This is an automated email from the git hooks/post-receive script. x2go pushed a commit to branch 3.6.x-rpm-debug in repository nx-libs. commit aaf78fdff9a4aa9d2b32bc8590976a4befcb02d7 Author: Mihai Moldovan <ionic@ionic.de> Date: Mon Mar 19 00:38:59 2018 +0100 nx-X11/programs/Xserver/hw/nxagent/Screen.c: implement split algorithm/functions. --- nx-X11/programs/Xserver/hw/nxagent/Screen.c | 215 ++++++++++++++++++++++++++++ 1 file changed, 215 insertions(+) diff --git a/nx-X11/programs/Xserver/hw/nxagent/Screen.c b/nx-X11/programs/Xserver/hw/nxagent/Screen.c index cd82111..1f2b08f 100644 --- a/nx-X11/programs/Xserver/hw/nxagent/Screen.c +++ b/nx-X11/programs/Xserver/hw/nxagent/Screen.c @@ -3910,6 +3910,221 @@ int nxagentChangeScreenConfig(int screen, int width, int height) } /* + * Structure containing a list of splits. + * + * Only used locally, not exported. + */ +typedef struct { + size_t x_count; + size_t y_count; + INT32 *x_splits; + INT32 *y_splits; +} nxagentScreenSplits; + +/* + * Helper function that takes a potential split point, the window bounds, + * a split count and a splits array. + * + * The function checks if the split point is within bounds, not already + * contained in the list and adds a new split point, modifying both the + * count parameter and the splits list. + * + * In case of errors, does nothing. + */ +static void nxagentAddToSplits(const CARD16 test_edge, const CARD16 rwin_start, const CARD16 rwin_end, size_t *split_count, INT32 *splits) { + if ((!(split_count)) || (!(splits))) { + return; + } + + /* FIXME: think through and check edge case: 1px split. */ + if ((rwin_start < test_edge) && (rwin_end > test_edge)) { + /* Edge somewhere inside of agent window, split point. */ + + /* Filter out if split point exists already. */ + Bool exists = FALSE; + for (size_t i = 0; i < (*split_count); ++i) { + if (splits[i] == test_edge) { + exists = TRUE; + break; + } + } + + if (!(exists)) { + splits[(*split_count)++] = test_edge; + } + } +} + +/* Helper function used while sorting the split lists. */ +static int nxagentCompareSplits(const void *lhs, const void *rhs) { + int ret = 0; + + const INT32 lhs_ = *((INT32*)(lhs)), + rhs_ = *((INT32*)(rhs)); + + if (lhs_ < rhs_) { + ret = -1; + } + else if (lhs_ > rhs_) { + ret = 1; + } + + return(ret); +} + +/* Helper function that deallocates a split list. */ +static void nxagentFreeSplits(nxagentScreenSplits **splits) { + if ((!(splits)) || (!(*splits))) { + return; + } + + nxagentScreenSplits *splits_ = (*splits); + + splits_->x_count = 0; + splits_->y_count = 0; + + SAFE_FREE(splits_->x_splits); + SAFE_FREE(splits_->y_splits); + SAFE_FREE(splits_); +} + +/* + * Helper function compacting an nxagentScreenSplits structure. + * The initial allocation assumes the worst case and overallocates memory, + * upper bounded by the maximum count of possible splits for a given screen + * configuration. + * This function compacts the lists back down into what is necessary only. + * + * In case of memory allocation errors, it frees all allocated datan and sets + * the splits list pointer to NULL! + */ +static void nxagentCompactSplits(nxagentScreenSplits **splits, const size_t actual_x_count, const size_t actual_y_count) { + if ((!(splits)) || (!(*splits))) { + return; + } + + nxagentScreenSplits *splits_ = (*splits); + + splits_->x_count = actual_x_count; + INT32 *new_data = NULL; + if (actual_x_count) { + /* Compact to accomodate actual data. */ + new_data = realloc(splits_->x_splits, sizeof(INT32) * actual_x_count); + + if (!(new_data)) { + nxagentFreeSplits(splits); + + return; + } + + splits_->x_splits = new_data; + } + else { + /* No splits in this dimension, drop data. */ + SAFE_FREE(splits_->x_splits); + } + + splits_->y_count = actual_y_count; + if (actual_y_count) { + new_data = realloc(splits_->y_splits, sizeof(INT32) * actual_y_count); + + if (!(new_data)) { + nxagentFreeSplits(splits); + + return; + } + + splits_->y_splits = new_data; + } + else { + /* No splits in this dimension, drop data. */ + SAFE_FREE(splits_->y_splits); + } +} + +/* + * Generate a list of splits. + * This is based upon the client's system configuration and will + * generally create more splits than we need/want. + * + * In case of errors, returns NULL. + */ +static nxagentScreenSplits* nxagentGenerateScreenSplitList(const XineramaScreenInfo *screen_info, const size_t screen_count) { + nxagentScreenSplits *ret = NULL; + + if (!(screen_info)) { + return(ret); + } + + /* + * The maximum number of split points per axis + * is screen_count * 2 due to the rectangular nature of a screen + * (and hence two vertical or horizontal edges). + */ + size_t split_counts = (screen_count * 2); + + ret = calloc(1, sizeof(nxagentScreenSplits)); + if (!ret) { + return(ret); + } + + ret->x_splits = calloc(split_counts, sizeof(INT32)); + ret->y_splits = calloc(split_counts, sizeof(INT32)); + if ((!(ret->x_splits)) || (!(ret->y_splits))) { + SAFE_FREE(ret->x_splits); + SAFE_FREE(ret); + + return(ret); + } + + /* + * Initialize split arrays to -1, denoting no split. + * Could be done only for the first invalid element, but play it safe. + */ + for (size_t i = 0; i < split_counts; ++i) { + ret->x_splits[i] = ret->y_splits[i] = -1; + } + + const CARD16 sess_x_start = nxagentOption(X), + sess_y_start = nxagentOption(Y), + sess_x_end = (sess_x_start + nxagentOption(Width)), + sess_y_end = (sess_y_start + nxagentOption(Height)); + + size_t actual_x_splits = 0, + actual_y_splits = 0; + + for (size_t i = 0; i < screen_count; ++i) { + /* Handle x component. */ + size_t start_x = screen_info[i].x_org, + end_x = start_x + screen_info[i].width; + + /* Left edge. */ + nxagentAddToSplits(start_x, sess_x_start, sess_x_end, &actual_x_splits, ret->x_splits); + + /* Right edge. */ + nxagentAddToSplits(end_x, sess_x_start, sess_x_end, &actual_x_splits, ret->x_splits); + + /* Handle y component. */ + size_t start_y = screen_info[i].y_org, + end_y = start_y + screen_info[i].height; + + /* Top edge. */ + nxagentAddToSplits(start_y, sess_y_start, sess_y_end, &actual_y_splits, ret->y_splits); + + /* Bottom edge. */ + nxagentAddToSplits(end_y, sess_y_start, sess_y_end, &actual_y_splits, ret->y_splits); + } + + /* + * Fetched all split points. + * Compact data and handle errors. + */ + nxagentCompactSplits(&ret, actual_x_splits, actual_y_splits); + + return(ret); +} + +/* Destroy an output after removing it from any crtc that might reference it */ void nxagentDropOutput(RROutputPtr o) { -- Alioth's /home/x2go-admin/maintenancescripts/git/hooks/post-receive-email on /srv/git/code.x2go.org/nx-libs.git

This is an automated email from the git hooks/post-receive script. x2go pushed a commit to branch 3.6.x-rpm-debug in repository nx-libs. commit 5537bb1025e752b947c56921eb983cd3db08dfc5 Author: Mihai Moldovan <ionic@ionic.de> Date: Sun Mar 18 03:01:28 2018 +0100 nx-X11/programs/Xserver/hw/nxagent/Screen.c: make intersect and intersect_bb static since they are only used in this file. --- nx-X11/programs/Xserver/hw/nxagent/Screen.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/nx-X11/programs/Xserver/hw/nxagent/Screen.c b/nx-X11/programs/Xserver/hw/nxagent/Screen.c index 6f0f99f..cd82111 100644 --- a/nx-X11/programs/Xserver/hw/nxagent/Screen.c +++ b/nx-X11/programs/Xserver/hw/nxagent/Screen.c @@ -3616,7 +3616,7 @@ Bool nxagentReconnectScreen(void *p0) } /* intersect two rectangles */ -Bool intersect(int ax1, int ay1, unsigned int aw, unsigned int ah, +static Bool intersect(int ax1, int ay1, unsigned int aw, unsigned int ah, int bx1, int by1, unsigned int bw, unsigned int bh, int *x, int *y, unsigned int *w, unsigned int *h) { @@ -3674,7 +3674,7 @@ Bool intersect(int ax1, int ay1, unsigned int aw, unsigned int ah, #ifndef NXAGENT_RANDR_XINERAMA_CLIPPING /* intersect two rectangles, return aw/ah for w/h if resulting rectangle is (partly) outside of bounding box */ -Bool intersect_bb(int ax1, int ay1, unsigned int aw, unsigned int ah, +static Bool intersect_bb(int ax1, int ay1, unsigned int aw, unsigned int ah, int bx1, int by1, unsigned int bw, unsigned int bh, int bbx1, int bby1, int bbx2, int bby2, int *x, int *y, unsigned int *w, unsigned int *h) -- Alioth's /home/x2go-admin/maintenancescripts/git/hooks/post-receive-email on /srv/git/code.x2go.org/nx-libs.git

This is an automated email from the git hooks/post-receive script. x2go pushed a commit to branch 3.6.x-rpm-debug in repository nx-libs. commit b03e638c9ae296c65945da4b570b03cf5245d34f Author: Mihai Moldovan <ionic@ionic.de> Date: Wed Apr 4 02:31:43 2018 +0200 nx-X11/programs/Xserver/hw/nxagent/Screen.c: implement algorithm generating a solution for extending a single box. --- nx-X11/programs/Xserver/hw/nxagent/Screen.c | 634 ++++++++++++++++++++++++++++ 1 file changed, 634 insertions(+) diff --git a/nx-X11/programs/Xserver/hw/nxagent/Screen.c b/nx-X11/programs/Xserver/hw/nxagent/Screen.c index 61cc8b3..903a773 100644 --- a/nx-X11/programs/Xserver/hw/nxagent/Screen.c +++ b/nx-X11/programs/Xserver/hw/nxagent/Screen.c @@ -42,6 +42,9 @@ is" without express or implied warranty. */ #include <signal.h> +#include <stdarg.h> +#include <math.h> +#include <float.h> #include "scrnintstr.h" #include "dix.h" @@ -3959,6 +3962,25 @@ typedef struct { } nxagentScreenBoxes; /* + * Structure containing a (potentially partial) solution to a Crtc tiling. + * + * Only used locally, not exported. + */ +typedef struct { + struct xorg_list entry; + size_t rating_size_change; + size_t rating_cover_penalty; + size_t rating_extended_boxes_count; + double rating; /* Calculated via the components above. */ + nxagentScreenBoxes *solution_boxes; + nxagentScreenBoxes *all_boxes; +} nxagentScreenCrtcsSolution; + +typedef struct xorg_list nxagentScreenCrtcsSolutions; + +#define INVALID_RATING ((-1) * (DBL_MAX)) + +/* * Helper function that takes a potential split point, the window bounds, * a split count and a splits array. * @@ -4890,6 +4912,618 @@ static Bool nxagentMergeScreenBoxes(nxagentScreenBoxes *all_boxes, nxagentScreen } /* + * Helper used to deep-copy an nxagentScreenBoxes list. + * + * Returns a pointer to a complete copy or NULL on failure. + */ +static nxagentScreenBoxes* nxagentScreenBoxesCopy(const nxagentScreenBoxes *boxes) { + nxagentScreenBoxes *ret = NULL; + + if (!(boxes)) { + return(ret); + } + + ret = calloc(1, sizeof(nxagentScreenBoxes)); + + if (!(ret)) { + return(ret); + } + + xorg_list_init(&(ret->head)); + + nxagentScreenBoxesElem *cur = NULL; + xorg_list_for_each_entry(cur, &(boxes->head), entry) { + nxagentScreenBoxesElem *copy = nxagentScreenBoxesElemCopy(cur, TRUE); + + if (!(copy)) { + nxagentFreeScreenBoxes(ret, TRUE); + + SAFE_FREE(ret); + + return(ret); + } + + xorg_list_append(&(copy->entry), &(ret->head)); + } + + ret->screen_id = boxes->screen_id; + + return(ret); +} + +/* Helper function that deallocates a single solution. */ +static void nxagentScreenCrtcsFreeSolution(nxagentScreenCrtcsSolution *solution) { + if (!(solution)) { + return; + } + + xorg_list_del(&(solution->entry)); + + solution->rating_size_change = solution->rating_cover_penalty = solution->rating_extended_boxes_count = 0; + solution->rating = 0.0; + + nxagentFreeScreenBoxes(solution->solution_boxes, TRUE); + SAFE_FREE(solution->solution_boxes); + + nxagentFreeScreenBoxes(solution->all_boxes, TRUE); + SAFE_FREE(solution->all_boxes); +} + +/* + * Helper to calculate a normalized sum for a list of boolean values. + * + * Each boolean value is normalized to to [0,1] range. + * + * Returns the sum of all normalized arguments. + */ +static size_t nxagentSumBools(const size_t count, ...) { + size_t ret = 0; + + va_list ap; + va_start(ap, count); + for (size_t i = 0; i < count; ++i) { + ret += (!(!(va_arg(ap, size_t)))); + } + va_end(ap); + + return(ret); +} + +/* + * Helper returning true if a given box intersects with a given screen box, + * otherwise and on error false. + */ +static Bool nxagentScreenBoxIntersectsScreenBox(const nxagentScreenBoxesElem *lhs, const nxagentScreenBoxesElem *rhs) { + Bool ret = FALSE; + + if ((!(lhs)) || (!(lhs->box)) || (!(rhs)) || (!(rhs->box))) { + return(ret); + } + + /* Find out if this box has intersections with display. */ + INT32 lhs_width = (lhs->box->x2 - lhs->box->x1), + lhs_height = (lhs->box->y2 - lhs->box->y1), + rhs_width = (rhs->box->x2 - rhs->box->x1), + rhs_height = (rhs->box->y2 - rhs->box->y1); + ret = intersect(lhs->box->x1, lhs->box->y1, + lhs_width, lhs_height, + rhs->box->x1, rhs->box->y1, + rhs_width, rhs_height, + NULL, NULL, NULL, NULL); + + return(ret); +} + +/* + * Calculates the rating for a given solution. + * + * Expects the size change and cover penalty struct variables to be set + * correctly. + * + * If boost is true, the rating calculated here will receive a small boost. + * + * On errors, sets the rating to INVALID_RATING or does nothing. + */ +static void nxagentScreenCrtcsSolutionCalculateRating(nxagentScreenCrtcsSolution *solution, const Bool boost) { + if ((!(solution)) || (!(solution->all_boxes))) { + return; + } + + size_t all_boxes_count = 0; + nxagentScreenBoxesElem *cur = NULL; + xorg_list_for_each_entry(cur, &(solution->all_boxes->head), entry) { + ++all_boxes_count; + } + + if (!(all_boxes_count)) { + solution->rating = INVALID_RATING; + return; + } + + solution->rating = (((double)(solution->rating_size_change) * ((double)(solution->rating_extended_boxes_count) + ((double)(solution->rating_size_change) / (double)(all_boxes_count)))) - (pow((double)(solution->rating_cover_penalty), 2.0))); + + if (boost) { + /* + * This is a magic number. + * It should be big enough so that it boosts the rating a tiny bit to + * prefer specific solutions, but small enough to never reach or exceed + * a +1 boost. + */ + solution->rating += (1.0 / 64.0); + } +} + +/* + * Helper that generates a solution for extending a specific box in one + * direction. + * + * Only one of the left, right, top or bottom parameters may be set to TRUE. + * + * The parameter "box" will be extended as much as possible in the specified + * direction, with the following constraints: + * - it's extended at least once unless hitting the nxagent window edge + * directly + * - it's further extended step-by-step IFF there are no "obsolete" boxes + * (i.e., base-level boxes already covered by a different screen box) in + * the extension direction. + * + * Note that the initial extension might not be a meaningful one. Calling + * functions must check the rating and determine if the solution is viable + * to them. + */ +static nxagentScreenCrtcsSolution* nxagentScreenCrtcsGenerateSolutionsSingleStep(const nxagentScreenBoxes *all_boxes, const nxagentScreenBoxesElem *box, const nxagentScreenBoxes *other_screens, const Bool left, const Bool right, const Bool top, const Bool bottom) { + nxagentScreenCrtcsSolution *ret = NULL; + + const size_t sum = nxagentSumBools(4, left, right, top, bottom); + if ((0 == sum) || (1 < sum) || (!(all_boxes)) || (!(box)) || (!(other_screens))) { + return(ret); + } + + ret = calloc(1, sizeof(nxagentScreenCrtcsSolution)); + + if (!(ret)) { + return(ret); + } + + xorg_list_init(&(ret->entry)); + ret->rating = INVALID_RATING; + + Bool init = TRUE, + cont = TRUE; + const nxagentScreenBoxesElem *box_ref = box; + const nxagentScreenBoxes *all_boxes_ref = all_boxes; + while (cont) { + /* + * Move one step into selected direction, unless hitting an obsolete block or the + * window edge. Obsolete blocks are not an obstacle for the initial run. + */ + size_t run_size_change = 0, + run_cover_penalty = 0; + nxagentScreenBoxesElem *cur = NULL; + nxagentScreenBoxes *merge_list = calloc(1, sizeof(nxagentScreenBoxes)); + + if (!(merge_list)) { + nxagentScreenCrtcsFreeSolution(ret); + + SAFE_FREE(ret); + + return(ret); + } + + xorg_list_init(&(merge_list->head)); + merge_list->screen_id = -1; + xorg_list_for_each_entry(cur, &(all_boxes->head), entry) { + /* + * Skip boxes already covered by this screen or other screens + * if we're looking for additional coverage. + */ + if ((!(init)) && (cur->obsolete)) { + continue; + } + + if (!(box_ref) || (!(box_ref->box)) || (!(cur->box))) { + nxagentFreeScreenBoxes(merge_list, TRUE); + + nxagentScreenCrtcsFreeSolution(ret); + + SAFE_FREE(merge_list); + + SAFE_FREE(ret); + + return(ret); + } + + if (nxagentCheckBoxAdjacency(box_ref->box, cur->box, FALSE, left, right, top, bottom)) { + /* Copy current box. */ + nxagentScreenBoxesElem *copy = nxagentScreenBoxesElemCopy(cur, TRUE); + + if (!(copy)) { + nxagentFreeScreenBoxes(merge_list, TRUE); + + nxagentScreenCrtcsFreeSolution(ret); + + SAFE_FREE(merge_list); + + SAFE_FREE(ret); + + return(ret); + } + + copy->obsolete = TRUE; + + xorg_list_append(&(copy->entry), &(merge_list->head)); + + ++run_size_change; + + /* + * Add a penalty value, if current box is already covered by at least + * one different screen box. + */ + nxagentScreenBoxesElem *cur_penalty_box = NULL; + /* FIXME: do we need more thorough error-checking for other_screens? */ + xorg_list_for_each_entry(cur_penalty_box, &(other_screens->head), entry) { + if (nxagentScreenBoxIntersectsScreenBox(cur, cur_penalty_box)) { + /* + * Add an initial penalty the first time for our current screen + * box. + */ + if (0 == run_cover_penalty) { + ++run_cover_penalty; + } + + ++run_cover_penalty; + } + } + } + + /* + * Break out early if possible. + * This assumes that the all_boxes list is sorted according to rows and cols. + */ + if ((left) || (right)) { + /* + * Discovering a box that is below the screen box means that any + * following boxes will be unsuitable for horizontal expansion. + */ + if (cur->box->y1 >= box_ref->box->y2) { + break; + } + } + + if (top) { + /* + * Discovering a box that is below the screen box's top edge means + * that any following boxes will be unsuitable for vertical expansion. + */ + if (cur->box->y1 >= box_ref->box->y1) { + break; + } + } + } + + /* + * At this point, merge_list should be populated with a list of boxes + * to merge with the current screen box. + * If it is incomplete (i.e., smaller height than the screen box for + * horizontal expansions or smaller width than the screen box for vertical + * expansions), merging will fail. + * Such a situation is fine, but will mean that we cannot extend the box. + */ + if (!(xorg_list_is_empty(&(merge_list->head)))) { + nxagentScreenBoxes *all_boxes_copy = nxagentScreenBoxesCopy(all_boxes_ref); + + if (!(all_boxes_copy)) { + nxagentFreeScreenBoxes(merge_list, TRUE); + + nxagentScreenCrtcsFreeSolution(ret); + + SAFE_FREE(merge_list); + + SAFE_FREE(ret); + + return(ret); + } + + /* Deep-copy original screen box. */ + nxagentScreenBoxesElem *screen_box_copy = nxagentScreenBoxesElemCopy(box_ref, TRUE); + + if (!(screen_box_copy)) { + nxagentFreeScreenBoxes(all_boxes_copy, TRUE); + nxagentFreeScreenBoxes(merge_list, TRUE); + + nxagentScreenCrtcsFreeSolution(ret); + + SAFE_FREE(all_boxes_copy); + SAFE_FREE(merge_list); + + SAFE_FREE(ret); + + return(ret); + } + + /* Add copy to merge list. */ + /* + * DO NOT change this to xorg_list_append(). Putting the screen box first + * means that, theoretically, all other boxes will be merged into it and + * we can assume that its screen_id entry stays valid. + */ + xorg_list_add(&(screen_box_copy->entry), &(merge_list->head)); + + /* Merge. */ + if (!(nxagentMergeBoxes(all_boxes_copy, merge_list))) { + /* + * Merging failed. Forgetting data and stopping extension. + * + * Make sure to not clear out ret. We want to retain and return a + * previous solution/extension. + */ + nxagentFreeScreenBoxes(all_boxes_copy, TRUE); + nxagentFreeScreenBoxes(merge_list, TRUE); + + SAFE_FREE(all_boxes_copy); + SAFE_FREE(merge_list); + + cont = FALSE; + } + else { + /* Merge successful. Create solution. */ + nxagentFreeScreenBoxes(ret->all_boxes, TRUE); + SAFE_FREE(ret->all_boxes); + ret->all_boxes = all_boxes_copy; + + nxagentFreeScreenBoxes(ret->solution_boxes, TRUE); + SAFE_FREE(ret->solution_boxes); + ret->solution_boxes = nxagentScreenBoxesCopy(merge_list); + + /* Unconditionally get rid of data. */ + nxagentFreeScreenBoxes(merge_list, TRUE); + + SAFE_FREE(merge_list); + + if (!(ret->solution_boxes)) { + nxagentScreenCrtcsFreeSolution(ret); + + SAFE_FREE(ret); + + return(ret); + } + + /* Update reference variables. */ + all_boxes_ref = ret->all_boxes; + + /* Should only have one box, so taking the first entry is fine. */ + box_ref = xorg_list_first_entry(&(ret->solution_boxes->head), nxagentScreenBoxesElem, entry); + + /* Update size change. */ + ret->rating_size_change += run_size_change; + + /* Update cover penalty. */ + ret->rating_cover_penalty += run_cover_penalty; + + /* One box was extended, record. */ + ret->rating_extended_boxes_count = 1; + } + } + else { + /* + * An empty merge list means that we didn't find other mergable boxes. + * Not an error, but rather an indication to stop the loop. + * + * Make sure to not clear out ret. + */ + nxagentFreeScreenBoxes(merge_list, TRUE); + + SAFE_FREE(merge_list); + + cont = FALSE; + } + + init = FALSE; + } + + if ((ret) && (ret->all_boxes) && (ret->solution_boxes)) { + /* + * Calculate actual rating. + */ + nxagentScreenCrtcsSolutionCalculateRating(ret, (top || bottom)); + } + else { + /* Invalid solution, clear out. */ + nxagentScreenCrtcsFreeSolution(ret); + + SAFE_FREE(ret); + } + + return(ret); +} + +/* + * Helper that deep-copies a single solution. + * + * Returns a pointer to the copy or NULL on error. + */ +static nxagentScreenCrtcsSolution* nxagentScreenCrtcsSolutionCopy(const nxagentScreenCrtcsSolution *solution) { + nxagentScreenCrtcsSolution *ret = NULL; + + if (!(solution)) { + return(ret); + } + + ret = calloc(1, sizeof(nxagentScreenCrtcsSolution)); + + if (!(ret)) { + return(ret); + } + + xorg_list_init(&(ret->entry)); + + ret->rating_size_change = solution->rating_size_change; + ret->rating_cover_penalty = solution->rating_cover_penalty; + ret->rating_extended_boxes_count = solution->rating_extended_boxes_count; + ret->rating = solution->rating; + + if (solution->solution_boxes) { + ret->solution_boxes = nxagentScreenBoxesCopy(solution->solution_boxes); + + if (!(ret->solution_boxes)) { + SAFE_FREE(ret); + + return(ret); + } + } + + if (solution->all_boxes) { + ret->all_boxes = nxagentScreenBoxesCopy(solution->all_boxes); + + if (!(ret->all_boxes)) { + nxagentFreeScreenBoxes(ret->solution_boxes, TRUE); + + SAFE_FREE(ret->solution_boxes); + + SAFE_FREE(ret); + + return(ret); + } + } + + return(ret); +} + +/* Helper function that deallocates a solutions list. */ +static void nxagentScreenCrtcsFreeSolutions(nxagentScreenCrtcsSolutions *solutions) { + if (!(solutions)) { + return; + } + + nxagentScreenCrtcsSolution *cur, *next = NULL; + xorg_list_for_each_entry_safe(cur, next, solutions, entry) { + nxagentScreenCrtcsFreeSolution(cur); + + SAFE_FREE(cur); + } + + xorg_list_init(solutions); +} + +/* + * Helper that extracts the best solutions out of a solutions list. + * + * Returns a list of best solutions or NULL on error. Might be empty. + */ +static nxagentScreenCrtcsSolutions* nxagentScreenCrtcsExtractBestSolutions(const nxagentScreenCrtcsSolutions *solutions) { + nxagentScreenCrtcsSolutions *ret = NULL; + + if (!(solutions)) { + return(ret); + } + + ret = calloc(1, sizeof(nxagentScreenCrtcsSolutions)); + + if (!(ret)) { + return(ret); + } + + xorg_list_init(ret); + + /* Get best rating value. */ + double best_rating = INVALID_RATING; + nxagentScreenCrtcsSolution *cur = NULL; + xorg_list_for_each_entry(cur, solutions, entry) { + if (cur->rating > best_rating) { + best_rating = cur->rating; + } + } + + if (INVALID_RATING == best_rating) { + /* No need to go through the list again, return empty list. */ + return(ret); + } + + xorg_list_for_each_entry(cur, solutions, entry) { + if (cur->rating == best_rating) { + nxagentScreenCrtcsSolution *cur_copy = nxagentScreenCrtcsSolutionCopy(cur); + + if (!(cur_copy)) { + nxagentScreenCrtcsFreeSolutions(ret); + + SAFE_FREE(ret); + + return(ret); + } + + xorg_list_append(&(cur_copy->entry), ret); + } + } + + return(ret); +} + +/* + * Helper generating a list of solutions, extending one specific initial + * screen box. + * + * Returns either a pointer to the solutions list or NULL on failure. + */ +static nxagentScreenCrtcsSolutions* nxagentScreenCrtcsGenerateSolutionsSingleScreen(const nxagentScreenBoxes *all_boxes, const nxagentScreenBoxesElem *box, const nxagentScreenBoxes *other_screens) { + nxagentScreenCrtcsSolutions *ret = NULL, + *tmp_solutions = NULL; + + if ((!(all_boxes)) || (!(box)) || (!(other_screens))) { + return(ret); + } + + tmp_solutions = calloc(1, sizeof(nxagentScreenCrtcsSolutions)); + + if (!(tmp_solutions)) { + return(ret); + } + + xorg_list_init(tmp_solutions); + + nxagentScreenCrtcsSolution *cur_solution = NULL; + + /* Left expansion. */ + cur_solution = nxagentScreenCrtcsGenerateSolutionsSingleStep(all_boxes, box, other_screens, TRUE, FALSE, FALSE, FALSE); + + if (cur_solution) { + xorg_list_append(&(cur_solution->entry), tmp_solutions); + } + + /* Right expansion. */ + cur_solution = nxagentScreenCrtcsGenerateSolutionsSingleStep(all_boxes, box, other_screens, FALSE, TRUE, FALSE, FALSE); + + if (cur_solution) { + xorg_list_append(&(cur_solution->entry), tmp_solutions); + } + + /* Top expansion. */ + cur_solution = nxagentScreenCrtcsGenerateSolutionsSingleStep(all_boxes, box, other_screens, FALSE, FALSE, TRUE, FALSE); + + if (cur_solution) { + xorg_list_append(&(cur_solution->entry), tmp_solutions); + } + + /* Bottom expansion. */ + cur_solution = nxagentScreenCrtcsGenerateSolutionsSingleStep(all_boxes, box, other_screens, FALSE, FALSE, FALSE, TRUE); + + if (cur_solution) { + xorg_list_append(&(cur_solution->entry), tmp_solutions); + } + + ret = nxagentScreenCrtcsExtractBestSolutions(tmp_solutions); + + /* + * Since the best solutions list is a deep copy, we can clear out the + * all solutions list. + */ + nxagentScreenCrtcsFreeSolutions(tmp_solutions); + + SAFE_FREE(tmp_solutions); + + return(ret); +} + +/* Destroy an output after removing it from any crtc that might reference it */ void nxagentDropOutput(RROutputPtr o) { -- Alioth's /home/x2go-admin/maintenancescripts/git/hooks/post-receive-email on /srv/git/code.x2go.org/nx-libs.git

This is an automated email from the git hooks/post-receive script. x2go pushed a commit to branch 3.6.x-rpm-debug in repository nx-libs. commit 91287427d3100439676ad72b36e4a8c96c1e38e7 Author: Mihai Moldovan <ionic@ionic.de> Date: Thu Mar 22 11:20:50 2018 +0100 nx-X11/programs/Xserver/hw/nxagent/Screen.c: add low-level screen boxes merging algorithm/functions. --- nx-X11/programs/Xserver/hw/nxagent/Screen.c | 535 ++++++++++++++++++++++++++++ 1 file changed, 535 insertions(+) diff --git a/nx-X11/programs/Xserver/hw/nxagent/Screen.c b/nx-X11/programs/Xserver/hw/nxagent/Screen.c index d090af2..61cc8b3 100644 --- a/nx-X11/programs/Xserver/hw/nxagent/Screen.c +++ b/nx-X11/programs/Xserver/hw/nxagent/Screen.c @@ -4355,6 +4355,541 @@ static nxagentScreenBoxes* nxagentGenerateScreenCrtcs(nxagentScreenSplits *split } /* + * Helper returning true if a given box intersects with a given screen, + * otherwise and on error false. + */ +static Bool nxagentScreenBoxIntersectsScreen(const nxagentScreenBoxesElem *box, const XineramaScreenInfo *screen_info) { + Bool ret = FALSE; + + if ((!(box)) || (!(box->box)) || (!(screen_info))) { + return(ret); + } + + /* Find out if this box has intersections with display. */ + INT32 box_width = (box->box->x2 - box->box->x1), + box_height = (box->box->y2 - box->box->y1); + ret = intersect(box->box->x1, box->box->y1, + box_width, box_height, + screen_info->x_org, screen_info->y_org, + screen_info->width, screen_info->height, + NULL, NULL, NULL, NULL); + + return(ret); +} + +/* Helper printing out a single screen box. */ +static char* nxagentPrintScreenBoxesElem(const nxagentScreenBoxesElem *box) { + char *ret = NULL; + + if ((!(box)) || (!(box->box))) { + return(ret); + } + + BoxPtr box_data = box->box; + + char *construct = NULL; + { + const signed long long screen_id = box->screen_id; + const unsigned obsolete = box->obsolete; + if (-1 == asprintf(&construct, "(%u)[(%d, %d), (%d, %d)]->%lld", obsolete, box_data->x1, box_data->y1, box_data->x2, box_data->y2, screen_id)) { + return(ret); + } + } + + ret = construct; + + return(ret); +} + +/* + * Helper comparing two box elements. + * Returns true if both data sections match, false otherwise or on error. + */ +static Bool nxagentCompareScreenBoxData(const BoxPtr lhs, const BoxPtr rhs) { + Bool ret = FALSE; + + if ((!(lhs)) || (!(rhs))) { + return(ret); + } + + if ((lhs->x1 == rhs->x1) && (lhs->x2 == rhs->x2) && (lhs->y1 == rhs->y1) && (lhs->y2 == rhs->y2)) { + ret = TRUE; + } + + return(ret); +} + +/* + * Helper marking a box in the all boxes list as obsolete. + * + * Returns true if such a box has been found (and marked), false otherwise + * or on error. + */ +static Bool nxagentScreenBoxMarkObsolete(nxagentScreenBoxes *all_boxes, const nxagentScreenBoxesElem *ref) { + Bool ret = FALSE; + + if ((!(ref)) || (!(all_boxes)) || (!(ref->box))) { + return(ret); + } + + nxagentScreenBoxesElem *cur_obsolete = NULL; + xorg_list_for_each_entry(cur_obsolete, &(all_boxes->head), entry) { + if (nxagentCompareScreenBoxData(cur_obsolete->box, ref->box)) { + cur_obsolete->obsolete = TRUE; + + ret = TRUE; + + break; + } + } + + return(ret); +} + +/* + * Helper for checking box adjacency. + * + * The edges for which adjacency should be detected can be toggled via the + * left, right, top or bottom parameters. Checking for adjacency with no edge + * selected is an error. + * + * Adjancency can be strict of loose. + * If strict checking is enabled via the strict parameter, boxes must strictly + * share one of the enabled edges. + * If strict checking is disabled, sharing only part of an selected edge is + * enough make the check succeed. + * + * Returns true if boxes are adjacent to each other, false otherwise or on + * error. + */ +static Bool nxagentCheckBoxAdjacency(const BoxPtr lhs, const BoxPtr rhs, const Bool strict, const Bool left, const Bool right, const Bool top, const Bool bottom) { + Bool ret = FALSE; + + if ((!(lhs)) || (!(rhs)) || ((!(left)) && (!(right)) && (!(top)) && (!(bottom)))) { + return(ret); + } + + if (((left) && (lhs->x1 == rhs->x2)) || ((right) && (lhs->x2 == rhs->x1))) { + if (strict) { + if ((lhs->y1 == rhs->y1) && (lhs->y2 == rhs->y2)) { + ret = TRUE; + } + } + else { + /* rhs->{y1,y2-1} within {lhs->y1, lhs->y2) */ + if (((rhs->y1 >= lhs->y1) && (rhs->y1 < lhs->y2)) || ((rhs->y2 > lhs->y1) && (rhs->y2 <= lhs->y2))) { + ret = TRUE; + } + } + } + + if (((top) && (lhs->y1 == rhs->y2)) || ((bottom) && (lhs->y2 == rhs->y1))) { + if (strict) { + if ((lhs->x1 == rhs->x1) && (lhs->x2 == rhs->x2)) { + ret = TRUE; + } + } + else { + /* rhs->{x1,x2} within {lhs->x1, lhs->x2) */ + if (((rhs->x1 >= lhs->x1) && (rhs->x1 < lhs->x2)) || ((rhs->x2 > lhs->x1) && (rhs->x2 <= lhs->x2))) { + ret = TRUE; + } + } + } + + return(ret); +} + +/* + * Helper used to shallow- or deep-copy an nxagentScreenBoxesElem object. + * + * Returns a pointer to the copy or NULL on failure. + */ +static nxagentScreenBoxesElem* nxagentScreenBoxesElemCopy(const nxagentScreenBoxesElem *box, const Bool deep) { + nxagentScreenBoxesElem *ret = NULL; + + if (!(box)) { + return(ret); + } + + ret = calloc(1, sizeof(nxagentScreenBoxesElem)); + + if (!(ret)) { + return(ret); + } + + memmove(ret, box, sizeof(*box)); + + xorg_list_init(&(ret->entry)); + + /* For a deep copy, also copy the data. */ + if (deep) { + BoxPtr new_box_data = calloc(1, sizeof(BoxRec)); + + if (!(new_box_data)) { + SAFE_FREE(ret); + + return(ret); + } + + memmove(new_box_data, box->box, sizeof(*(box->box))); + + ret->box = new_box_data; + } + + return(ret); +} + +/* + * Helper merging boxes on a low level. + * Returns true if merging succeeded, otherwise or on error false. + * + * If merging succeded, the merge_boxes list shall contain only one element: + * the extended box representing a screen. + * + * In case of errors, the original list may or may not be modified. + * Assume that the data is invalid. + */ +static Bool nxagentMergeBoxes(nxagentScreenBoxes *all_boxes, nxagentScreenBoxes *merge_boxes) { + Bool ret = FALSE; + + if ((!(all_boxes)) || (!(merge_boxes))) { + return(ret); + } + + /* + * Special case: merge_boxes is empty. In such a case, return TRUE + * immediately. + */ + if (xorg_list_is_empty(&(merge_boxes->head))) { + ret = TRUE; + + return(ret); + } + + /* Naïve approach: merge of all boxes is the bounding box. */ + BoxRec bounding_box = { 0 }; + nxagentScreenBoxesElem *cur = NULL; + Bool init = FALSE; + size_t merge_boxes_count = 0; + xorg_list_for_each_entry(cur, &(merge_boxes->head), entry) { + if (!(cur->box)) { + return(ret); + } + + if (!(init)) { + bounding_box.x1 = cur->box->x1; + bounding_box.x2 = cur->box->x2; + bounding_box.y1 = cur->box->y1; + bounding_box.y2 = cur->box->y2; + + init = TRUE; + + ++merge_boxes_count; + + continue; + } + + bounding_box.x1 = MIN(cur->box->x1, bounding_box.x1); + bounding_box.x2 = MAX(cur->box->x2, bounding_box.x2); + bounding_box.y1 = MIN(cur->box->y1, bounding_box.y1); + bounding_box.y2 = MAX(cur->box->y2, bounding_box.y2); + + ++merge_boxes_count; + } + + /* + * Don't treat one box to merge as a special case. + * Returning directly is a mistake since in this case the corresponding box + * in the all boxes list wouldn't be correctly marked as obsolete. + * + * Copying the code for doing this into a special branch here doesn't make + * sense, so just let the normal algorithm handle that. + */ + + /* Try to find a suitable merge pair. */ + cur = NULL; + nxagentScreenBoxesElem *merge_rhs = NULL; + Bool restart = TRUE; + while (restart) { + restart = FALSE; + + xorg_list_for_each_entry(cur, &(merge_boxes->head), entry) { + if (!(cur->box)) { + return(ret); + } + + /* + * Mark left-hand side box as obsolete. + * We pick a box (usually the first one, but if there no mergable boxes + * readily available maybe others), search for a different mergable box, + * merge the picked box with the other box by extending it and mark the + * right-hand side original box as obsolete in the all boxes list. + * + * Observant readers might have noticed that we will never mark a picked + * box as obsolete this way, so we'll have to work around that issue at + * the beginning. + */ + if (cur->obsolete) { + if (!(nxagentScreenBoxMarkObsolete(all_boxes, cur))) { + /* False means that we haven't found a box to mark obsolete. */ +#ifdef WARNING + fprintf(stderr, "%s: couldn't find left-hand box in original list - box has likely already been merged into a different one.\n", __func__); +#endif + } + } + + xorg_list_for_each_entry(merge_rhs, &(cur->entry), entry) { + if (&(merge_rhs->entry) == &(merge_boxes->head)) { + /* Reached end of list. */ + merge_rhs = NULL; + break; + } + + /* + * Do not move this up. + * + * The list head won't have a box element and accessing it would + * actually read random data. + */ + if (!(merge_rhs->box)) { + return(ret); + } + + /* Check adjacency. */ + if (nxagentCheckBoxAdjacency(cur->box, merge_rhs->box, TRUE, TRUE, TRUE, TRUE, TRUE)) { + break; + } + } + + /* cur and merge_rhs are mergeable. */ + /* + * Side note, since working with lists is tricky: normally, the element + * pointer shouldn't be used after iterating over all list elements. + * In such a case, it would point to an invalid entry, since the list + * head is a simple xorg_list structure instead of an element-type. + * The looping macro takes care of this internally by always checking + * it->member against the known list head, which adds a previously + * subtracted offset back to the pointer in the break statement. It does, + * however, not modify the iteration pointer itself. + * In this special case, continuing to use the iteration pointer is safe + * due to always breaking out of the loop early when we know that we are + * working on a valid element or setting the iterator pointer to NULL. + */ + if (merge_rhs) { +#ifdef DEBUG + { + char *box_left_str = nxagentPrintScreenBoxesElem(cur); + char *box_right_str = nxagentPrintScreenBoxesElem(merge_rhs); + + fprintf(stderr, "%s: mergeable boxes found: ", __func__); + if (!(box_left_str)) { + fprintf(stderr, "box with invalid data [%p]", (void*)(cur)); + } + else { + fprintf(stderr, "%s", box_left_str); + } + + if (!(box_right_str)) { + fprintf(stderr, ", box with invalid data [%p]\n", (void*)(merge_rhs)); + } + else { + fprintf(stderr, ", %s\n", box_right_str); + } + + SAFE_FREE(box_left_str); + SAFE_FREE(box_right_str); + } +#endif + cur->box->x1 = MIN(cur->box->x1, merge_rhs->box->x1); + cur->box->x2 = MAX(cur->box->x2, merge_rhs->box->x2); + cur->box->y1 = MIN(cur->box->y1, merge_rhs->box->y1); + cur->box->y2 = MAX(cur->box->y2, merge_rhs->box->y2); + + /* Delete merge_rhs box out of merge list ... */ + xorg_list_del(&(merge_rhs->entry)); + + /* + * ... and mark an equivalent box in the all boxes list as obsolete. + * + * Note that it is not an error condition if no such box exists in the + * all boxes list. More likely we tried to mark a box obsolete that + * has already been merged with a different one (and now covers more + * than one entry in the all boxes list). + */ + if (merge_rhs->obsolete) { + if (!(nxagentScreenBoxMarkObsolete(all_boxes, merge_rhs))) { + /* False means that we haven't found a box to mark obsolete. */ +#ifdef WARNING + fprintf(stderr, "%s: merged boxes from merge list, but couldn't find right-hand box in original list - box has likely already been merged into a different one.\n", __func__); +#endif + } + } + + /* + * Remove merge_rhs's internal box data. + * Since it's a deep copy, only this element will be affected. + */ + SAFE_FREE(merge_rhs->box); + + /* + * At this point, merge_rhs's data has been free()d and the box + * element is not part of the merge_boxes lists. + * Delete the box element. + */ + SAFE_FREE(merge_rhs); + + /* + * Set restart flag and break out. + * + * After removing an entry from the list, we have to make sure to + * restart the loop, since otherwise we'd be operating on free'd + * data. + * + * An alternative would be to use xorg_list_for_each_entry_safe() + * to skip over the removed element, but this wouldn't rewind the + * pointer to the head element - which is what we also want to do. + */ + restart = TRUE; + + break; + } + else { +#ifdef DEBUG + char *box_str = nxagentPrintScreenBoxesElem(cur); + + fprintf(stderr, "%s: no mergeable box found for", __func__); + if (box_str) { + fprintf(stderr, " current box %s\n", box_str); + } + else { + fprintf(stderr, " box with invalid data [%p]\n", (void*)(cur)); + } + + SAFE_FREE(box_str); +#endif + } + } + } + + /* All boxes merged, we should only have one left. */ + merge_boxes_count = 0; + xorg_list_for_each_entry(cur, &(merge_boxes->head), entry) { + if (!(cur->box)) { + return(ret); + } + + ++merge_boxes_count; + } + + if (1 < merge_boxes_count) { +#ifdef WARNING + fprintf(stderr, "%s: WARNING: box merge operation produced more than one box - initial merge list was not a rectangle!\n", __func__); +#endif + } + else if (0 == merge_boxes_count) { +#ifdef WARNING + fprintf(stderr, "%s: WARNING: box merge operation produced a merged box count of 0!\n", __func__); +#endif + } + else { + /* Just take the first element, there should only be one box. */ + cur = xorg_list_first_entry(&(merge_boxes->head), nxagentScreenBoxesElem, entry); + + /* + * Safe to use cur here as we know that list has exactly one element + * and we break out directly at a point for which we know that the + * pointer is valid. + */ + if (nxagentCompareScreenBoxData(&bounding_box, cur->box)) { +#ifdef DEBUG + fprintf(stderr, "%s: merging operations result is equal to bounding box, could have avoided complex calculations.\n", __func__); +#endif + ret = TRUE; + } + } + + return(ret); +} + +/* + * Helper merging boxes that pertain to specific screen. + * Expects a list of all boxes, an array of screen boxes, a screen info array + * and the screen count. + * The screen boxes array msut have been allocated by the caller with at least + * screen count elements. Further elements are ignored. + * + * In case of errors, the original all boxes and screen boxes lists may or may + * not be modified or even the data free'd. + * Assume that the data is invalid. + */ +static Bool nxagentMergeScreenBoxes(nxagentScreenBoxes *all_boxes, nxagentScreenBoxes *screen_boxes, const XineramaScreenInfo *screen_info, const size_t screen_count) { + Bool ret = FALSE; + + if ((!(all_boxes)) || (!(screen_boxes)) || (!(screen_info)) || (!(screen_count))) { + return(ret); + } + + for (size_t i = 0; i < screen_count; ++i) { + /* + * Structure holding the box elements intersecting with + * the current screen. + */ + nxagentScreenBoxes *cur_screen_boxes = (screen_boxes + i); + xorg_list_init(&(cur_screen_boxes->head)); + cur_screen_boxes->screen_id = i; + + nxagentScreenBoxesElem *cur_box = NULL; + xorg_list_for_each_entry(cur_box, &(all_boxes->head), entry) { + Bool cur_intersect = nxagentScreenBoxIntersectsScreen(cur_box, &(screen_info[i])); + + if (cur_intersect) { + /* + * If a screen intersects the current box, we must: + * - create a deep copy of this box + * - add the copy to the screen boxes list + * - set the obsolete flag appropriately + * - start the low-level merge operation on the screen boxes list + * + * After this, assuming no error happened, the screen boxes list will + * contain only one element: a box containing the screen area. + */ + nxagentScreenBoxesElem *box_copy = nxagentScreenBoxesElemCopy(cur_box, TRUE); + + if (!(box_copy)) { + nxagentFreeScreenBoxes(all_boxes, TRUE); + nxagentFreeScreenBoxes(screen_boxes, TRUE); + + return(ret); + } + + box_copy->screen_id = cur_screen_boxes->screen_id; + box_copy->obsolete = TRUE; + + for (size_t y = (i + 1); y < screen_count; ++y) { + if (nxagentScreenBoxIntersectsScreen(cur_box, &(screen_info[y]))) { + /* Protect box, if still needed later on after merging this set. */ + box_copy->obsolete = FALSE; + break; + } + } + + xorg_list_append(&(box_copy->entry), &(cur_screen_boxes->head)); + } + } + + /* Actually merge the boxes. */ + if (!(nxagentMergeBoxes(all_boxes, cur_screen_boxes))) { + return(ret); + } + } + + ret = TRUE; + + return(ret); +} + +/* Destroy an output after removing it from any crtc that might reference it */ void nxagentDropOutput(RROutputPtr o) { -- Alioth's /home/x2go-admin/maintenancescripts/git/hooks/post-receive-email on /srv/git/code.x2go.org/nx-libs.git

This is an automated email from the git hooks/post-receive script. x2go pushed a commit to branch 3.6.x-rpm-debug in repository nx-libs. commit 158701a2188ffb232da7a60db60e7ff713dbb1ca Author: Mihai Moldovan <ionic@ionic.de> Date: Thu Mar 29 00:30:48 2018 +0200 nx-X11/programs/Xserver/hw/nxagent/Screen.c: implement basic screen boxes extending algorithm, generating a list of solutions. --- nx-X11/programs/Xserver/hw/nxagent/Screen.c | 1355 +++++++++++++++++++++++++++ 1 file changed, 1355 insertions(+) diff --git a/nx-X11/programs/Xserver/hw/nxagent/Screen.c b/nx-X11/programs/Xserver/hw/nxagent/Screen.c index 903a773..2213040 100644 --- a/nx-X11/programs/Xserver/hw/nxagent/Screen.c +++ b/nx-X11/programs/Xserver/hw/nxagent/Screen.c @@ -5524,6 +5524,1361 @@ static nxagentScreenCrtcsSolutions* nxagentScreenCrtcsGenerateSolutionsSingleScr } /* + * Helper calculating an obsolete boxes count, given a list of all boxes. + * + * Note that it might be zero if there are no obsolete boxes or an error + * happened. If the error parameter is non-NULL, its value will be set to true + * to indicate an error. + */ +#ifdef DEBUG +/* + * When debugging, make sure the guards are not optimized away. Otherwise + * providing NULL for the err parameter will crash when calling the function + * directly in debuggers. + */ +__attribute__((optimize("O0"))) +#endif +static size_t nxagentScreenBoxesObsoleteCount(const nxagentScreenBoxes *all_boxes, Bool *err) { + size_t ret = 0; + + if (err) { + *err = FALSE; + } + + if (!(all_boxes)) { + if (err) { + *err = TRUE; + } + + return(ret); + } + + nxagentScreenBoxesElem *cur = NULL; + xorg_list_for_each_entry(cur, &(all_boxes->head), entry) { + if (cur->obsolete) { + ++ret; + } + } + + return(ret); +} + +/* + * Helper that exchanges a screen box for a new one. + * The original box is destroyed, the new box is deep-copied. + * + * Returns true on success, otherwise false. + */ +static Bool nxagentScreenBoxesUpdateScreenBox(nxagentScreenBoxes *boxes, const size_t screen_number, const nxagentScreenBoxesElem *new_box) { + Bool ret = FALSE; + + if ((!(boxes)) || (!(new_box))) { + return(ret); + } + + nxagentScreenBoxesElem *cur_box = NULL; + size_t i = 0; + xorg_list_for_each_entry(cur_box, &(boxes->head), entry) { + if (cur_box->screen_id == new_box->screen_id) { + /* Need to exchange the current box. */ + nxagentScreenBoxesElem *new_copy = nxagentScreenBoxesElemCopy(new_box, TRUE); + + if (!(new_copy)) { + return(ret); + } + + /* + * Taking out the magic wand here: + * Since an xorg_list is cyclic and we know that the current element + * exists, we can use an append operation to insert the new element and + * then delete the old one. + * Instead of appending to the original list head (in this case boxes), + * we'll append to the current element. The actual magic is that a list + * append operation is *actually* a prepend operation relative to the + * passed head element. + * + * Example: + * Original list (each edge is actually a double edge pointing in both + * directions): + * + * ┌──────────────────────────────────────────┐ + * ↓ │ + * [HEAD] ↔ [elem1] ↔ [elem2] ↔ [elem3] ↔ ... ←─┘ + * + * Append operation relative to HEAD: + * + * ┌───────────────────────────────────────────────────────┐ + * ↓ │ + * [HEAD] ↔ [elem1] ↔ [elem2] ↔ [elem3] ↔ ... ↔ [new_elem] ←─┘ + * + * Append operation relative to elem2: + * + * ┌───────────────────────────────────────────────────────┐ + * ↓ │ + * [HEAD] ↔ [elem1] ↔ [new_elem] ↔ [elem2] ↔ [elem3] ↔ ... ←─┘ + * + * Afterwards, delete operation on elem2: + * + * ┌─────────────────────────────────────────────┐ + * ↓ │ + * [HEAD] ↔ [elem1] ↔ [new_elem] ↔ [elem3] ↔ ... ←─┘ + * + * Observant readers might have noticed that using either a list append + * or add operation (i.e., relative to given head element an inverse + * append or "real" append operation) followed by a delete operation for + * the current element will lead to the same result. + * + * We'll use an append/inverse append operation, though, since this makes + * the most sense. + */ + xorg_list_append(&(new_copy->entry), &(cur_box->entry)); + xorg_list_del(&(cur_box->entry)); + + /* Get rid of cur_box. */ + SAFE_FREE(cur_box); + + ret = TRUE; + break; + } + + i++; + } + + /* + * If ret is still false here it means that the list did not contain an + * element at position pos (i.e., it was too small). + * + * No need for special treatment. + */ + + return(ret); +} + +/* + * Helper that generates an array with solution lists for each screen box and + * direction. + * + * The array will always be screen_count-sized. + * + * Returns a pointer to the array. Will be NULL on failure. + */ +static nxagentScreenCrtcsSolutions** nxagentScreenCrtcsGeneratePotentialSolutionArray(const nxagentScreenBoxes *all_boxes, const nxagentScreenBoxes *screen_boxes, const size_t screen_count) { + nxagentScreenCrtcsSolutions **ret = NULL; + + /* FIXME: xorg_list_is_empty is not const-correct. */ + if ((!(screen_count)) || (xorg_list_is_empty((struct xorg_list *)(&(screen_boxes->head)))) || (xorg_list_is_empty((struct xorg_list *)(&(all_boxes->head))))) { + return(ret); + } + + ret = calloc(screen_count, sizeof(nxagentScreenCrtcsSolutions*)); + + if (!(ret)) { + return(ret); + } + + for (size_t i = 0; i < screen_count; ++i) { + nxagentScreenBoxesElem *tmp_box = NULL; + { + size_t y = 0; + xorg_list_for_each_entry(tmp_box, &(screen_boxes->head), entry) { + /* y == i means that we found our current box and can break out. */ + if (y++ == i) { + break; + } + } + + if ((&(tmp_box->entry)) == &(screen_boxes->head)) { +#ifdef WARNING + fprintf(stderr, "%s: reached end of list while fetching specific box. Algorithm error.\n", __func__); +#endif + + for (size_t z = 0; z < screen_count; ++z) { + nxagentScreenCrtcsFreeSolutions(ret[z]); + + SAFE_FREE(ret[z]); + } + + SAFE_FREE(ret); + + return(ret); + } + } + + /* Build other_screens list. */ + nxagentScreenBoxes *other_screens = calloc(1, sizeof(nxagentScreenBoxes)); + + if (!(other_screens)) { +#ifdef WARNING + fprintf(stderr, "%s: unable to allocate space for other_screens list.\n", __func__); +#endif + + for (size_t y = 0; y < screen_count; ++y) { + nxagentScreenCrtcsFreeSolutions(ret[y]); + + SAFE_FREE(ret[y]); + } + + SAFE_FREE(ret); + + return(ret); + } + + xorg_list_init(&(other_screens->head)); + other_screens->screen_id = -1; + + nxagentScreenBoxesElem *tmp = NULL; + xorg_list_for_each_entry(tmp, &(screen_boxes->head), entry) { + if (tmp != tmp_box) { + /* Copy current element. */ + nxagentScreenBoxesElem *box_copy = nxagentScreenBoxesElemCopy(tmp, TRUE); + + if (!(box_copy)) { +#ifdef WARNING + fprintf(stderr, "%s: unable to copy current screen box.\n", __func__); +#endif + + for (size_t y = 0; y < screen_count; ++y) { + nxagentScreenCrtcsFreeSolutions(ret[y]); + + SAFE_FREE(ret[y]); + } + + nxagentFreeScreenBoxes(other_screens, TRUE); + + SAFE_FREE(other_screens); + + SAFE_FREE(ret); + + return(ret); + } + + /* Add to other_screens list. */ + xorg_list_append(&(box_copy->entry), &(other_screens->head)); + } + } + + /* + * Right now, all_boxes contains all boxes, including obsolete + * information, tmp_box is the current screen box to extend and + * other_screens contains the other screen boxes. + * + * With that, we can fetch a solutions list comprising of the best(!) + * solutions for extending the current box in all directions. + */ + nxagentScreenCrtcsSolutions *cur_screen_solutions = nxagentScreenCrtcsGenerateSolutionsSingleScreen(all_boxes, tmp_box, other_screens); + + /* + * Clean up other_screens. Doing that now means we don't have to do it in + * the error handling. + */ + nxagentFreeScreenBoxes(other_screens, TRUE); + + SAFE_FREE(other_screens); + + /* NULL means failure or no solutions. */ + if (!(cur_screen_solutions)) { +#ifdef WARNING + fprintf(stderr, "%s: no solution found for current configuration. Algorithm error.\n", __func__); +#endif + + for (size_t y = 0; y < screen_count; ++y) { + nxagentScreenCrtcsFreeSolutions(ret[y]); + + SAFE_FREE(ret[y]); + } + + SAFE_FREE(ret); + + return(ret); + } + + /* + * If everything worked out, we'll have a solutions list. + * It might contain multiple entries, but at this point we don't care, + * since they may not have the highest overall rating. + * Just add them to our general solutions list. + * + * We're just setting plain pointer values here, which should work fine + * since the next and prev pointers point to the addresses of an + * element's entry xorg_list struct. + * + * Be careful, though. + */ + ret[i] = cur_screen_solutions; + } + + return(ret); +} + +/* + * Helper that extracts the best solutions from a screen_count-sized solutions + * array and, at the same time, records if a screen is suitable for extension. + * + * The arrays will always likewise be screen_count-sized. + * + * The last two parameters are output parameters that expect to be passed a + * valid address. NULL pointers for any parameter or a zero screen count will be + * treated as an error. init might be zero (i.e., false). + * + * Returns true on success, otherwise false. + */ +static Bool nxagentScreenCrtcsFilterScreenSolutions(const nxagentScreenCrtcsSolutions * const *solutions, const size_t screen_count, const Bool init, const Bool *screens_init, nxagentScreenCrtcsSolutions ***best_screen_solutions, Bool **screen_selection) { + Bool ret = FALSE; + + if ((!(solutions)) || (!(screen_count)) || (!(screens_init)) || (!(best_screen_solutions)) || (!(screen_selection))) { + return(ret); + } + + (*screen_selection) = NULL; + (*best_screen_solutions) = NULL; + + double *screen_ratings = calloc(screen_count, sizeof(double)); + + if (!(screen_ratings)) { + return(ret); + } + + Bool *screen_overlap_free = calloc(screen_count, sizeof(Bool)); + + if (!(screen_overlap_free)) { + SAFE_FREE(screen_ratings); + + return(ret); + } + + (*screen_selection) = calloc(screen_count, sizeof(Bool)); + (*best_screen_solutions) = calloc(screen_count, sizeof(nxagentScreenCrtcsSolutions*)); + + if ((!((*screen_selection))) || (!((*best_screen_solutions)))) { + SAFE_FREE(screen_ratings); + SAFE_FREE(screen_overlap_free); + + /* Let caller handle other cleanup. It'll be done there anyway. */ + return(ret); + } + + /* + * We consider two different cases when filtering solutions: + * - the initial case, used as long as we have non-extended (i.e., + * initial) screen boxes and + * - the normal case. + * + * The initial case is slightly different, since we generally need to + * consider every best solution per initial box. + * This ensures initial expansion (together with the rating function + * favoring initial expansion). + * + * In both cases, we still have to consider all screen boxes (i.e., also + * the already extended ones in the initial case), since we want to fish + * out solutions with no additional overlap. + * + * Viable solutions will be selected with this preference (n.b.: as the + * name implies, all solutions we can select from are the best for their + * respective screen): + * - if we have solutions with no additional overlap, take the best + * one(s) + * otherwise + * - if there are still screens to extend, take the best one(s) for an + * unextended screen + * otherwise + * - take the overall best one(s). + * + * Mixing all solutions into one list and extracting the best solutions is + * not feasible in this algorithmic branch siince we wouldn't be able to + * map the solution back to an initial screen. + * + * Instead, we'll mark screens as selected and pull out solutions manually. + */ + + /* Update the screen_overlap_free and screen_ratings arrays. */ + Bool overlap_free = FALSE; + double max_rating = INVALID_RATING, + max_overlap_free_rating = INVALID_RATING; + for (size_t i = 0; i < screen_count; ++i) { + screen_ratings[i] = INVALID_RATING; + screen_overlap_free[i] = FALSE; + + /* Extract best solutions first. */ + (*best_screen_solutions)[i] = nxagentScreenCrtcsExtractBestSolutions(solutions[i]); + + if (!((*best_screen_solutions)[i])) { + SAFE_FREE(screen_ratings); + SAFE_FREE(screen_overlap_free); + + /* Let caller handle other cleanup. It'll be done there anyway. */ + return(ret); + } + + /* Skip this part if we have no solutions in the list. */ + if (!(xorg_list_is_empty((*best_screen_solutions)[i]))) { + nxagentScreenCrtcsSolution *cur = xorg_list_first_entry((*best_screen_solutions)[i], nxagentScreenCrtcsSolution, entry); + + /* + * Rating must be the same for all entries in a list as returned by + * nxagentScreenCrtcsExtractBestSolutions(). + */ + screen_ratings[i] = cur->rating; + + /* + * Covers might be different per-solution, so go through the full list. + */ + cur = NULL; + xorg_list_for_each_entry(cur, (*best_screen_solutions)[i], entry) { + if (!(cur->rating_cover_penalty)) { + screen_overlap_free[i] = TRUE; + + if (screen_ratings[i] > max_overlap_free_rating) { + max_overlap_free_rating = screen_ratings[i]; + } + + /* First non-overlapping solution is all we care about. */ + break; + } + } + } + + overlap_free |= screen_overlap_free[i]; + + /* + * max_rating is useful in the case we have no overlap-free solutions. + * + * We care for all screens after initialization or for non-extended screens + * prior to initialization. + */ + if ((init) || (!(screens_init[i]))) { + if (screen_ratings[i] > max_rating) { + max_rating = screen_ratings[i]; + } + } + } + + if (((overlap_free) && (INVALID_RATING == max_overlap_free_rating)) || ((!(overlap_free)) && (INVALID_RATING == max_rating))) { +#ifdef WARNING + fprintf(stderr, "%s: no solution found for current configuration in %sscreen extension run%s. Algorithm error.\n", __func__, init ? "initial " : "", init ? ", but not all initial screen boxes have been extended yet" : ""); +#endif + + SAFE_FREE(screen_ratings); + SAFE_FREE(screen_overlap_free); + + /* Let caller handle other cleanup. It'll be done there anyway. */ + return(ret); + } + + if (overlap_free) { + /* + * We know that there is at least one overlap-free solution. The real + * question left is which screens have the highest-rating solutions. + * + * Go through the list and compare with the best rating. + * + * FIXME: do we want some more magic here to prefer non-extended screens + * during the initial extension run, even if that would mean picking + * worse (i.e., non-best) solutions? + */ + for (size_t i = 0; i < screen_count; ++i) { + if ((screen_overlap_free[i]) && (screen_ratings[i] == max_overlap_free_rating)) { + /* + * This screen has a maximum overlap-free rating. Since it may also + * contain non-overlap-free solutions, filter them out to make later + * handling easier. + */ + nxagentScreenCrtcsSolution *cur = NULL, + *tmp = NULL; + xorg_list_for_each_entry_safe(cur, tmp, (*best_screen_solutions)[i], entry) { + if (cur->rating_cover_penalty) { + xorg_list_del(&(cur->entry)); + + nxagentScreenCrtcsFreeSolution(cur); + + SAFE_FREE(cur); + } + } + + /* Mark this screen as suitable for further processing. */ + (*screen_selection)[i] = TRUE; + } + } + } + else { + /* + * No non-overlapping solutions found, so either select the best-rated + * non-extended screen(s) or generally the best-rated screen(s). + * + * Luckily we've already got the best rating value as max_rating, so we'll + * just need to go through the list again and mark the affected solutions + * as selected. + */ + for (size_t i = 0; i < screen_count; ++i) { + if (screen_ratings[i] == max_rating) { + (*screen_selection)[i] = TRUE; + } + } + } + + ret = TRUE; + + SAFE_FREE(screen_ratings); + SAFE_FREE(screen_overlap_free); + + return(ret); +} + +/* + * Helper setting up its my_solution output parameter according to the first + * solution in the best_screen_solutions list. + * + * No pointer parameters may be NULL. screen_number is allowed to be zero + * (indicating the first screen). + * + * Returns true on success, otherwise false. + */ +static Bool nxagentScreenCrtcsSelectSolution(const nxagentScreenBoxes *screen_boxes, const size_t screen_number, const Bool *screens_init, const nxagentScreenCrtcsSolutions *best_screen_solutions, nxagentScreenCrtcsSolution **my_solution) { + Bool ret = FALSE; + + if ((!(screen_boxes)) || (!(screens_init)) || (!(best_screen_solutions)) || (!(my_solution))) { + return(ret); + } + + /* + * Always take the first entry for the current run. + */ + nxagentScreenCrtcsSolution *first_entry = xorg_list_first_entry(best_screen_solutions, nxagentScreenCrtcsSolution, entry); + + /* + * Assert that first_entry is always a legit one - since we checked + * the amount of solutions before, that should be safe. + * This is why we don't check the return value here. + */ + + nxagentScreenCrtcsSolution *tmp_solution = nxagentScreenCrtcsSolutionCopy(first_entry); + + if (!(tmp_solution)) { +#ifdef WARNING + fprintf(stderr, "%s: unable to copy generated solution.\n", __func__); +#endif + + return(ret); + } + + if (!(*my_solution)) { + /* If we don't have a solution yet, use this one. */ + (*my_solution) = tmp_solution; + } + else { + /* Otherwise, modify my_solution. */ + (*my_solution)->rating_size_change += tmp_solution->rating_size_change; + (*my_solution)->rating_cover_penalty += tmp_solution->rating_cover_penalty; + + if (!(screens_init[screen_number])) { + (*my_solution)->rating_extended_boxes_count += tmp_solution->rating_extended_boxes_count; /* Should always be +1. */ + } + + (*my_solution)->rating += tmp_solution->rating; + + /* Plainly take the all_boxes pointer. */ + nxagentFreeScreenBoxes((*my_solution)->all_boxes, TRUE); + SAFE_FREE((*my_solution)->all_boxes); + (*my_solution)->all_boxes = nxagentScreenBoxesCopy(tmp_solution->all_boxes); + + if (!((*my_solution)->all_boxes)) { +#ifdef WARNING + fprintf(stderr, "%s: unable to copy current all boxes state.\n", __func__); +#endif + + return(ret); + } + } + + /* + * The solution boxes list handling is more complicated. + * Our new, temporary solution only has the extended screen box + * in its solution list - we will want to merge that into our + * solutions list, replacing the original one in there (if it + * exists). + */ + + /* Take a copy of the original solutions boxes pointer. */ + nxagentScreenBoxes *orig_solution_boxes = (*my_solution)->solution_boxes; + + /* Copy work_screens to the solution boxes of my_solution. */ + (*my_solution)->solution_boxes = nxagentScreenBoxesCopy(screen_boxes); + + if (!((*my_solution)->solution_boxes)) { +#ifdef WARNING + fprintf(stderr, "%s: unable to copy current screen state.\n", __func__); +#endif + + return(ret); + } + + if ((!(orig_solution_boxes)) || (xorg_list_is_empty(&(orig_solution_boxes->head)))) { +#ifdef WARNING + fprintf(stderr, "%s: original solution boxes list invalid or empty.\n", __func__); +#endif + + nxagentFreeScreenBoxes(orig_solution_boxes, TRUE); + + SAFE_FREE(orig_solution_boxes); + + return(ret); + } + + /* + * Fetch actual screen box. The solutions list should only + * contain one element, so breaking out directly should be + * safe. + */ + nxagentScreenBoxesElem *cur_box = xorg_list_first_entry(&(first_entry->solution_boxes->head), nxagentScreenBoxesElem, entry); + + const Bool update = nxagentScreenBoxesUpdateScreenBox((*my_solution)->solution_boxes, screen_number, cur_box); + + /* + * Outside of error handling, since we need to get rid of this + * data unconditionally. + */ + nxagentFreeScreenBoxes(orig_solution_boxes, TRUE); + + SAFE_FREE(orig_solution_boxes); + + if (!(update)) { +#ifdef WARNING + { + const unsigned long long screen_number_ = screen_number; + fprintf(stderr, "%s: unable to update solution screen number %llu.\n", __func__, screen_number_); + } +#endif + + return(ret); + } + + /* Delete taken solution out of the list. */ + xorg_list_del(&(first_entry->entry)); + + /* Get rid of the entry. */ + nxagentScreenCrtcsFreeSolution(first_entry); + + SAFE_FREE(first_entry); + + ret = TRUE; + + return(ret); +} + +/* + * Declaration needed since the next function is using one that is only defined + * at a later point. + * + * Moving it up would be problematic since in that case we'd need even more + * declarations for other functions. + */ +static nxagentScreenCrtcsSolutions* nxagentScreenCrtcsGenerateSolutions(const nxagentScreenBoxes *all_boxes, const nxagentScreenBoxes *initial_screens, const size_t all_boxes_count, const size_t screen_count, const Bool *orig_screens_init); + +/* + * Helper handling all the solutions in best_screen_solutions recursively, + * adding them to the ret_solutions output parameter list. + * + * No pointer parameters may be NULL. screen_count and screen_number might be + * zero. + * + * Returns true on success, otherwise false. + */ +static Bool nxagentScreenCrtcsRecurseSolutions(const nxagentScreenBoxes *screen_boxes, const size_t screen_count, const size_t all_boxes_count, const Bool *screens_init, const size_t screen_number, const nxagentScreenCrtcsSolutions *best_screen_solutions, nxagentScreenCrtcsSolutions *ret_solutions) { + Bool ret = FALSE; + + if ((!(screen_boxes)) || (!(screen_count)) || (!(all_boxes_count)) || (!(screens_init)) || (!(best_screen_solutions)) || (!(ret_solutions))) { + return(ret); + } + + nxagentScreenCrtcsSolution *cur_solution = NULL; + xorg_list_for_each_entry(cur_solution, best_screen_solutions, entry) { + /* Other solutions will be handled recursively. */ + + /* Copy screens_init and set current screen value to true. */ + Bool *recursive_screens_init = calloc(screen_count, sizeof(Bool)); + + if (!(recursive_screens_init)) { +#ifdef WARNING + fprintf(stderr, "%s: unable to copy screen initialization array.\n", __func__); +#endif + + return(ret); + } + + memmove(recursive_screens_init, screens_init, (screen_count * sizeof(Bool))); + + recursive_screens_init[screen_number] = TRUE; + + nxagentScreenBoxes *recursive_work_screens = nxagentScreenBoxesCopy(screen_boxes); + + if (!(recursive_work_screens)) { +#ifdef WARNING + fprintf(stderr, "%s: unable to copy current screen state.\n", __func__); +#endif + + SAFE_FREE(recursive_screens_init); + + return(ret); + } + + if ((!(cur_solution->solution_boxes)) || (xorg_list_is_empty(&(cur_solution->solution_boxes->head)))) { +#ifdef WARNING + fprintf(stderr, "%s: current solution boxes list is empty or invalid. Algorithm error.\n", __func__); +#endif + + nxagentFreeScreenBoxes(recursive_work_screens, TRUE); + + SAFE_FREE(recursive_work_screens); + + SAFE_FREE(recursive_screens_init); + + return(ret); + } + + nxagentScreenBoxesElem *cur_box = xorg_list_first_entry(&(cur_solution->solution_boxes->head), nxagentScreenBoxesElem, entry); + + const Bool update = nxagentScreenBoxesUpdateScreenBox(recursive_work_screens, screen_number, cur_box); + + if (!(update)) { +#ifdef WARNING + fprintf(stderr, "%s: unable to update screen state.\n", __func__); +#endif + + nxagentFreeScreenBoxes(recursive_work_screens, TRUE); + + SAFE_FREE(recursive_screens_init); + + SAFE_FREE(recursive_work_screens); + + return(ret); + } + + nxagentScreenCrtcsSolutions *tmp_solutions = nxagentScreenCrtcsGenerateSolutions(cur_solution->all_boxes, recursive_work_screens, all_boxes_count, screen_count, recursive_screens_init); + + /* Get rid of the temporary screens init array again. */ + SAFE_FREE(recursive_screens_init); + + /* Get rid of the modified work screens list. */ + nxagentFreeScreenBoxes(recursive_work_screens, TRUE); + + SAFE_FREE(recursive_work_screens); + + if (!(tmp_solutions)) { +#ifdef WARNING + fprintf(stderr, "%s: unable to generate a new solutions list. Algorithm error.\n", __func__); +#endif + + return(ret); + } + + /* + * tmp_solutions should now contain a list of possible solutions, + * add to ret_solutions. + */ + nxagentScreenCrtcsSolution *cur_solution_it = NULL, + *next_solution = NULL; + xorg_list_for_each_entry_safe(cur_solution_it, next_solution, tmp_solutions, entry) { + xorg_list_del(&(cur_solution_it->entry)); + xorg_list_append(&(cur_solution_it->entry), ret_solutions); + } + + /* tmp_solutions should be empty now, safe to free. */ + SAFE_FREE(tmp_solutions); + } + + ret = TRUE; + + return(ret); +} + +/* + * Helper for handling solution lists. This probably is the heart of the screen + * extension code. The function is called once per extension run and calls + * other functions to save the very first solution and recursively generate + * alternative solutions. + * + * No pointer parameters might be NULL. init might be zero (i.e., false). + * + * Returns true on success, otherwise false. + */ +static Bool nxagentScreenCrtcsHandleSolutions(const nxagentScreenBoxes *all_boxes, const nxagentScreenBoxes *screen_boxes, const Bool init, const Bool *screens_init, const size_t screen_count, const size_t all_boxes_count, const Bool *screen_selection, nxagentScreenCrtcsSolutions *ret_solutions, ssize_t *screen_to_init, nxagentScreenCrtcsSolutions **best_screen_solutions, nxagentScreenCrtcsSolution **my_solution) { + Bool ret = FALSE; + + if ((!(all_boxes)) || (!(screen_boxes)) || (!(screens_init)) || (!(screen_count)) || (!(all_boxes_count)) || (!(screen_selection)) || (!(ret_solutions)) || (!(screen_to_init)) || (!(best_screen_solutions)) || (!(my_solution))) { + return(ret); + } + + /* + * In case we have multiple solutions with a maximum rating, we need to + * consider each solution, which means branching off for all but one + * solution and only handling one solution in this run. + * Selecting the solution for the current run is tricky, though. We + * could either take the very first one, which is relatively easy, the + * last one, which is complicated because there might be multiple + * screens with a maximum rating and finding the last one is tricky + * with a spread-out array. Merging all solutions into one list and then + * taking the last element would be easy to do, but has the negative + * consequence of not being able to tell what screen the individual + * solutions belonged to originally - at least not without + * "sophisticated" means like keeping the original list and deep-checking + * objects for equality or creating another structure. + * Selecting a more or less random solution at the end of the first + * screen would work, but feels weird if there are more screens with + * potential solutions. + * + * Hence, let's go for selecting the very first solution. + */ + Bool fetched_solution = FALSE; + (*screen_to_init) = -1; + for (size_t i = 0; i < screen_count; ++i) { + if (screen_selection[i]) { + /* + * This screen has been selected. + * Its solution list may include more than one solution, though, + * which means that we have to branch off and consider each + * individual solution. + * At the very end, we select (potentially one of) the overall best + * solution. + */ + + if ((!(best_screen_solutions[i])) || (xorg_list_is_empty(best_screen_solutions[i]))) { +#ifdef WARNING + fprintf(stderr, "%s: current screen marked with a maximum rating, but no solutions found in screen extension run. Algorithm error.\n", __func__); +#endif + + return(ret); + } + + /* + * One or more solution(s), if necessary take the first one as the + * current solution and then branch off for the others. + */ + if (!(fetched_solution)) { + Bool fetch = nxagentScreenCrtcsSelectSolution(screen_boxes, i, screens_init, best_screen_solutions[i], my_solution); + + if (!(fetch)) { +#ifdef WARNING + fprintf(stderr, "%s: error while selecting solution for current run.\n", __func__); +#endif + + return(ret); + } + + fetched_solution = TRUE; + + /* + * DO NOT modify other data (screen, all boxes or screen initialization + * array) here! + * We will need to change these variables eventually, but given + * that we may have further solutions to process/generate, doing + * it here would be an error. + * Refer to the later part of nxagentScreenCrtcsGenerateSolutions for + * this. + */ + if (init) { + (*screen_to_init) = i; + } + } + + Bool recursive_solutions = nxagentScreenCrtcsRecurseSolutions(screen_boxes, screen_count, all_boxes_count, screens_init, i, best_screen_solutions[i], ret_solutions); + + if (!(recursive_solutions)) { +#ifdef WARNING + fprintf(stderr, "%s: error while handling other solutions recursively in current run.\n", __func__); +#endif + + return(ret); + } + } + } + + ret = TRUE; + + return(ret); +} + +/* + * Helper updating internal data in nxagentScreenCrtcsGenerateSolutions(). + * This mostly exists to avoid complicated data freeing while updating the + * internal data. + * + * No pointers might be NULL. screens_to_init is allowed to be zero or + * negative, although negative values will not lead to changed data. This is + * not considered an error. + * + * Returns true on success, otherwise false. + */ +static Bool nxagentScreenCrtcsGenerateSolutionsUpdateInternalData(const nxagentScreenBoxes *all_boxes, const nxagentScreenBoxes *screen_boxes, const ssize_t screen_to_init, nxagentScreenBoxes **work_all_boxes, nxagentScreenBoxes **work_screens, Bool *screens_init) { + Bool ret = FALSE; + + if ((!(all_boxes)) || (!(screen_boxes)) || (!(work_all_boxes)) || (!(work_screens)) || (!(screens_init))) { + return(ret); + } + + nxagentFreeScreenBoxes((*work_all_boxes), TRUE); + + SAFE_FREE((*work_all_boxes)); + + nxagentFreeScreenBoxes((*work_screens), TRUE); + + SAFE_FREE((*work_screens)); + + (*work_all_boxes) = nxagentScreenBoxesCopy(all_boxes); + + if (!((*work_all_boxes))) { +#ifdef WARNING + fprintf(stderr, "%s: unable to copy current screen boxes.\n", __func__); +#endif + + return(ret); + } + + (*work_screens) = nxagentScreenBoxesCopy(screen_boxes); + + if (!((*work_screens))) { +#ifdef WARNING + fprintf(stderr, "%s: unable to copy current screen boxes.\n", __func__); +#endif + + nxagentFreeScreenBoxes((*work_all_boxes), TRUE); + + SAFE_FREE((*work_all_boxes)); + + return(ret); + } + + /* + * Mark the current screen as initialized. + * DO NOT move this to the other functions, since we might have + * multiple screens with a maximum rating, but will not extend + * the other screens in the current run (but rather in recursive + * calls). + */ + if (0 <= screen_to_init) { +#ifdef WARNING + if (screens_init[screen_to_init]) { + const unsigned long long screen_number = screen_to_init; + fprintf(stderr, "%s: shall set screen init for screen number %llu to TRUE, but already marked as initialized. Algorithm warning.\n", __func__, screen_number); + } +#endif + + screens_init[screen_to_init] = TRUE; + } + + ret = TRUE; + + return(ret); +} + +/* + * Helper generating a "fake" solution based on the passed-in data. + * + * This is useful if no screens needed extension. + * + * No pointer parameters might be NULL. + * + * On success, returns a "fake" solution, otherwise NULL. + */ +static nxagentScreenCrtcsSolution* nxagentScreenCrtcsGenerateFakeSolution(const nxagentScreenBoxes *all_boxes, const nxagentScreenBoxes *screen_boxes) { + nxagentScreenCrtcsSolution *ret = NULL; + + if ((!(all_boxes)) || (!(screen_boxes))) { + return(ret); + } + + ret = calloc(1, sizeof(nxagentScreenCrtcsSolution)); + + if (!(ret)) { + return(ret); + } + + xorg_list_init(&(ret->entry)); + + ret->all_boxes = nxagentScreenBoxesCopy(all_boxes); + + if (!(ret->all_boxes)) { + nxagentScreenCrtcsFreeSolution(ret); + + SAFE_FREE(ret); + + return(ret); + } + + ret->solution_boxes = nxagentScreenBoxesCopy(screen_boxes); + + if (!(ret->solution_boxes)) { + nxagentScreenCrtcsFreeSolution(ret); + + SAFE_FREE(ret); + + return(ret); + } + + ret->rating_size_change = ret->rating_cover_penalty = ret->rating_extended_boxes_count = 0; + ret->rating = 0.0; + + nxagentScreenCrtcsSolutionCalculateRating(ret, FALSE); + + return(ret); +} + +/* + * Helper generating a list of solutions, extending the initial screen boxes. + * + * All pointer arguments but orig_screens_init must be non-NULL. All size + * parameters must be non-zero. + * + * Returns either a pointer to the solutions list or NULL on failure. + */ +static nxagentScreenCrtcsSolutions* nxagentScreenCrtcsGenerateSolutions(const nxagentScreenBoxes *all_boxes, const nxagentScreenBoxes *initial_screens, const size_t all_boxes_count, const size_t screen_count, const Bool *orig_screens_init) { + nxagentScreenCrtcsSolutions *ret = NULL; + + /* + * We assume that the screen and all boxes count as passed in match the + * actual data. + * + * We also assume that there is at least one screen. Otherwise, generating a + * fake one here and running an expensive algorithm on this which trivially + * will cover all base boxes anyway doesn't make a lot of sense. + * Theoretically, such a situation could occur if moving the nxagent window + * completely out of any screen bounds. This could potentially also happen if + * the window is initialized on a screen, which is later disconnected. + * Normally X11 window managers should take care of this situation and move + * the window to a connected screen again, but that doesn't happen on Windows + * for instance. This makes such windows inaccessible and would lead to an + * empty initial screens list. + */ + if ((!(all_boxes)) || (!(initial_screens)) || (!(all_boxes_count)) || (!(screen_count))) { + return(ret); + } + + /* Check that initial_screens and all_boxes are not empty. */ + /* FIXME: xorg_list_is_empty is not const-correct. */ + if ((xorg_list_is_empty((struct xorg_list *)(&(initial_screens->head)))) || (xorg_list_is_empty((struct xorg_list *)(&(all_boxes->head))))) { +#ifdef WARNING + fprintf(stderr, "%s: initial_screens or all_boxes empty, assuming error and returning NULL.\n", __func__); +#endif + + return(ret); + } + + Bool err = FALSE; + size_t obsolete_boxes_count = nxagentScreenBoxesObsoleteCount(all_boxes, &err); + + if (err) { + return(ret); + } + +#ifdef DEBUG + { + const unsigned long long obsolete_boxes_count_ = obsolete_boxes_count; + fprintf(stderr, "%s: calculated initial obsolete boxes count: %llu\n", __func__, obsolete_boxes_count_); + } +#endif + + /* + * orig_screens_init as passed-in to the function (if non-NULL) will serve as + * the base initialization of the array. + * Each function execution is reponsible for freeing the memory at the end - + * not callees. + */ + Bool *screens_init = calloc(screen_count, sizeof(Bool)); + + if (!(screens_init)) { + return(ret); + } + + if (orig_screens_init) { + memmove(screens_init, orig_screens_init, (screen_count * sizeof(*screens_init))); + } + + /* + * Let work_screens and work_all_boxes point to initial_screens and all_boxes + * respectively. + */ + nxagentScreenBoxes *work_screens = nxagentScreenBoxesCopy(initial_screens); + + if (!(work_screens)) { + SAFE_FREE(screens_init); + + return(ret); + } + + nxagentScreenBoxes *work_all_boxes = nxagentScreenBoxesCopy(all_boxes); + + if (!(work_all_boxes)) { + nxagentFreeScreenBoxes(work_screens, TRUE); + + SAFE_FREE(work_screens); + + SAFE_FREE(screens_init); + + return(ret); + } + + ret = calloc(1, sizeof(nxagentScreenCrtcsSolutions)); + + if (!(ret)) { + nxagentFreeScreenBoxes(work_screens, TRUE); + nxagentFreeScreenBoxes(work_all_boxes, TRUE); + + SAFE_FREE(work_screens); + SAFE_FREE(work_all_boxes); + + SAFE_FREE(screens_init); + + return(ret); + } + + xorg_list_init(ret); + + Bool init = TRUE; + nxagentScreenCrtcsSolution *my_solution = NULL; + while (obsolete_boxes_count < all_boxes_count) { + ssize_t screen_to_init = -1; + + nxagentScreenCrtcsSolutions **extended_screens = nxagentScreenCrtcsGeneratePotentialSolutionArray(work_all_boxes, work_screens, screen_count); + + if (!(extended_screens)) { + nxagentScreenCrtcsFreeSolutions(ret); + + nxagentScreenCrtcsFreeSolution(my_solution); + + nxagentFreeScreenBoxes(work_screens, TRUE); + nxagentFreeScreenBoxes(work_all_boxes, TRUE); + + SAFE_FREE(ret); + + SAFE_FREE(my_solution); + + SAFE_FREE(work_screens); + SAFE_FREE(work_all_boxes); + + SAFE_FREE(screens_init); + + return(ret); + } + + init = FALSE; + + /* If one screen wasn't extended yet, init should be true. Sync state. */ + for (size_t i = 0; i < screen_count; ++i) { + init |= (!(screens_init[i])); + } + + nxagentScreenCrtcsSolutions **best_screen_solutions = NULL; + Bool *screen_selection = NULL; + + /* + * Could work without an explicit cast, but C doesn't implement a more + * complicated implicit cast rule while C++ does. + */ + Bool filter = nxagentScreenCrtcsFilterScreenSolutions((const nxagentScreenCrtcsSolutions * const *)(extended_screens), screen_count, init, screens_init, &best_screen_solutions, &screen_selection); + + /* + * Clean up extended_screens. We don't need it any longer. + * Do this before error handling, since it will need to be free'd in any + * case. + */ + for (size_t i = 0; i < screen_count; ++i) { + nxagentScreenCrtcsFreeSolutions(extended_screens[i]); + + SAFE_FREE(extended_screens[i]); + } + + SAFE_FREE(extended_screens); + + if (!(filter)) { + for (size_t i = 0; i < screen_count; ++i) { + nxagentScreenCrtcsFreeSolutions(best_screen_solutions[i]); + + SAFE_FREE(best_screen_solutions[i]); + } + + nxagentScreenCrtcsFreeSolutions(ret); + + nxagentScreenCrtcsFreeSolution(my_solution); + + nxagentFreeScreenBoxes(work_screens, TRUE); + nxagentFreeScreenBoxes(work_all_boxes, TRUE); + + SAFE_FREE(best_screen_solutions); + + SAFE_FREE(ret); + + SAFE_FREE(my_solution); + + SAFE_FREE(work_screens); + SAFE_FREE(work_all_boxes); + + SAFE_FREE(screens_init); + SAFE_FREE(screen_selection); + + return(ret); + } + + Bool solution_handling = nxagentScreenCrtcsHandleSolutions(work_all_boxes, work_screens, init, screens_init, screen_count, all_boxes_count, screen_selection, ret, &screen_to_init, best_screen_solutions, &my_solution); + + /* Unconditionally get rid of best_screen_solutions. */ + for (size_t i = 0; i < screen_count; ++i) { + nxagentScreenCrtcsFreeSolutions(best_screen_solutions[i]); + + SAFE_FREE(best_screen_solutions[i]); + } + + SAFE_FREE(best_screen_solutions); + + /* And screen_selection. */ + SAFE_FREE(screen_selection); + + if (!(solution_handling)) { +#ifdef WARNING + fprintf(stderr, "%s: unable to handle screen boxes in current run.\n", __func__); +#endif + + nxagentScreenCrtcsFreeSolutions(ret); + + nxagentScreenCrtcsFreeSolution(my_solution); + + nxagentFreeScreenBoxes(work_screens, TRUE); + nxagentFreeScreenBoxes(work_all_boxes, TRUE); + + SAFE_FREE(ret); + + SAFE_FREE(my_solution); + + SAFE_FREE(work_screens); + SAFE_FREE(work_all_boxes); + + SAFE_FREE(screens_init); + + return(ret); + } + + /* + * This is actually the right place to change these variables. For more + * information, refer to comments in the other functions. + */ + Bool update_data = nxagentScreenCrtcsGenerateSolutionsUpdateInternalData(my_solution->all_boxes, my_solution->solution_boxes, screen_to_init, &work_all_boxes, &work_screens, screens_init); + + if (!(update_data)) { +#ifdef WARNING + fprintf(stderr, "%s: unable to update internal data in current run.\n", __func__); +#endif + + nxagentScreenCrtcsFreeSolutions(ret); + + nxagentScreenCrtcsFreeSolution(my_solution); + + nxagentFreeScreenBoxes(work_screens, TRUE); + nxagentFreeScreenBoxes(work_all_boxes, TRUE); + + SAFE_FREE(ret); + + SAFE_FREE(my_solution); + + SAFE_FREE(work_screens); + SAFE_FREE(work_all_boxes); + + SAFE_FREE(screens_init); + + return(ret); + } + + obsolete_boxes_count = nxagentScreenBoxesObsoleteCount(work_all_boxes, &err); + + if (err) { +#ifdef WARNING + fprintf(stderr, "%s: unable to update obsolete base boxes.\n", __func__); +#endif + + nxagentScreenCrtcsFreeSolutions(ret); + + nxagentScreenCrtcsFreeSolution(my_solution); + + nxagentFreeScreenBoxes(work_screens, TRUE); + nxagentFreeScreenBoxes(work_all_boxes, TRUE); + + SAFE_FREE(ret); + + SAFE_FREE(my_solution); + + SAFE_FREE(work_screens); + SAFE_FREE(work_all_boxes); + + SAFE_FREE(screens_init); + + return(ret); + } + +#ifdef DEBUG + { + const unsigned long long obsolete_boxes_count_ = obsolete_boxes_count; + fprintf(stderr, "%s: recalculated obsolete boxes count: %llu\n", __func__, obsolete_boxes_count_); + } +#endif + } + + /* Unconditional cleanup. */ + SAFE_FREE(screens_init); + + /* + * Having no solution means that we didn't have to generate one, i.e., that + * the original screen boxes were all extended in the first place. + * + * In such a case, copy the input data and recalculate the rating with size + * changes set to zero. + */ + if (!(my_solution)) { + my_solution = nxagentScreenCrtcsGenerateFakeSolution(work_all_boxes, work_screens); + } + + /* Cleanup. */ + nxagentFreeScreenBoxes(work_screens, TRUE); + nxagentFreeScreenBoxes(work_all_boxes, TRUE); + + SAFE_FREE(work_screens); + SAFE_FREE(work_all_boxes); + + if (!(my_solution)) { +#ifdef WARNING + fprintf(stderr, "%s: unable to generate \"fake\" solution.\n", __func__); +#endif + + nxagentScreenCrtcsFreeSolutions(ret); + + SAFE_FREE(ret); + + return(ret); + } + + /* + * Reaching this point means that we've extended everything to cover all + * non-obsoleted base boxes. + * + * my_solution isn't part of ret yet, so add it. + */ + xorg_list_append(&(my_solution->entry), ret); + + /* + * At the end of this function, we should only have fully extended solutions + * (i.e., no partial ones). + * Due to that, extracing the best solution(s) should work fine and leave out + * solutions that are not interesting to us. + */ + nxagentScreenCrtcsSolutions *best_ret = nxagentScreenCrtcsExtractBestSolutions(ret); + + /* Get rid of old solutions list. */ + nxagentScreenCrtcsFreeSolutions(ret); + + SAFE_FREE(ret); + + ret = best_ret; + + + return(ret); +} + +/* Destroy an output after removing it from any crtc that might reference it */ void nxagentDropOutput(RROutputPtr o) { -- Alioth's /home/x2go-admin/maintenancescripts/git/hooks/post-receive-email on /srv/git/code.x2go.org/nx-libs.git

This is an automated email from the git hooks/post-receive script. x2go pushed a commit to branch 3.6.x-rpm-debug in repository nx-libs. commit 04d9b3c8d93057b0f0075620487c700a120176ed Author: Mihai Moldovan <ionic@ionic.de> Date: Mon Apr 30 21:41:45 2018 +0200 nx-X11/programs/Xserver/hw/nxagent/Screen.c: reimplement Xinerama RandR adjustment function based on the new screen tiling functions. --- nx-X11/programs/Xserver/hw/nxagent/Screen.c | 697 ++++++++++++++++++++++------ 1 file changed, 554 insertions(+), 143 deletions(-) diff --git a/nx-X11/programs/Xserver/hw/nxagent/Screen.c b/nx-X11/programs/Xserver/hw/nxagent/Screen.c index 0f5e681..08ecbcc 100644 --- a/nx-X11/programs/Xserver/hw/nxagent/Screen.c +++ b/nx-X11/programs/Xserver/hw/nxagent/Screen.c @@ -45,6 +45,7 @@ is" without express or implied warranty. #include <stdarg.h> #include <math.h> #include <float.h> +#include <time.h> #include "scrnintstr.h" #include "dix.h" @@ -3980,6 +3981,8 @@ typedef struct xorg_list nxagentScreenCrtcsSolutions; #define INVALID_RATING ((-1) * (DBL_MAX)) +static nxagentScreenCrtcsSolution *nxagentScreenCrtcsTiling = NULL; + /* * Helper function that takes a potential split point, the window bounds, * a split count and a splits array. @@ -7288,6 +7291,276 @@ void nxagentDropOutput(RROutputPtr o) { RROutputDestroy(o); } +/* + * Helper used to swap the *data* of two nxagentScreenBoxesElem objects. + * Metadata, such as the internal list pointers, is not touched. + * + * Returns true on success, otherwise false. + */ +static Bool nxagentScreenBoxesElemSwap(nxagentScreenBoxesElem *lhs, nxagentScreenBoxesElem *rhs) { + Bool ret = FALSE; + + if ((!(lhs)) || (!(rhs))) { + return(ret); + } + + nxagentScreenBoxesElem *tmp = nxagentScreenBoxesElemCopy(lhs, FALSE); + + if (!(tmp)) { + return(ret); + } + + lhs->obsolete = rhs->obsolete; + lhs->screen_id = rhs->screen_id; + lhs->box = rhs->box; + + rhs->obsolete = tmp->obsolete; + rhs->screen_id = tmp->screen_id; + rhs->box = tmp->box; + + SAFE_FREE(tmp); + + ret = TRUE; + + return(ret); +} + +/* + * Helper executing the actual quicksort implementation. + * + * No pointer parameters might be NULL. + * + * Returns true on success, otherwise false. + */ +static Bool nxagentScreenBoxesQSortImpl(nxagentScreenBoxesElem *left, nxagentScreenBoxesElem *right, const size_t left_idx, const size_t right_idx, nxagentScreenBoxes *boxes) { + Bool ret = TRUE; + + if ((!(left)) || (!(right)) || (!(boxes))) { + ret = FALSE; + + return(ret); + } + + if (left_idx >= right_idx) { + return(ret); + } + + /* Select pivot. */ + size_t diff = (right_idx - left_idx); + size_t pivot_i = (left_idx + (rand() % diff)); + + nxagentScreenBoxesElem *pivot = NULL; + { + size_t i = 0; + xorg_list_for_each_entry(pivot, &(boxes->head), entry) { + if (i++ == pivot_i) { + break; + } + } + } + + /* IDs should be unique, so no need to optimize for same values. */ + nxagentScreenBoxesElem *left_ = left, + *right_ = right, + *split = NULL; + ssize_t left_i = left_idx, + right_i = right_idx, + split_i = -1; + while (TRUE) { + /* + * Careful: xorg_list_for_each_entry() skips over the first element (since + * it's assumed to be the list head without actual data), so we'll need to + * "rewind" the pointer first. + * + * Don't do this for right_, since we use a special implementation for + * iterating backwards. + */ + left_ = xorg_list_last_entry(&(left_->entry), nxagentScreenBoxesElem, entry); + + xorg_list_for_each_entry(left_, &(left_->entry), entry) { + if (&(left_->entry) == &(boxes->head)) { + ret = FALSE; + + break; + } + + /* + * Normally implementations check if they should continue, we check if we + * should break out instead. + * + * N.B.: left_ should never reach the list head. + */ + if ((left_->screen_id) >= (pivot->screen_id)) { + break; + } + + ++left_i; + } + + if (!(ret)) { + break; + } + + /* + * The xorg_list implementation does not have a way to iterate over a list + * reversely, so implement it with basic building blocks. + */ + while (&(right_->entry) != &(right->entry)) { + if (&(right_->entry) == &(boxes->head)) { + ret = FALSE; + + break; + } + + /* + * Normally implementations check if they should continue, we check if we + * should break out instead. + * + * N.B.: right_ should never reach the list head. + */ + if ((right_->screen_id) <= (pivot->screen_id)) { + break; + } + + --right_i; + + /* + * Move backwards. Last entry is actually the previous one. For more + * information see the comments in nxagentScreenBoxesUpdateScreenBox(). + */ + right_ = xorg_list_last_entry(&(right_->entry), nxagentScreenBoxesElem, entry); + } + + if (!(ret)) { + break; + } + + if (left_i >= right_i) { + split = right; + split_i = right_i; + + break; + } + + ret = nxagentScreenBoxesElemSwap(left_, right_); + + if (!(ret)) { + break; + } + } + + if (!(ret)) { + return(ret); + } + + ret = nxagentScreenBoxesQSortImpl(left, split, left_idx, split_i, boxes); + + if (!(ret)) { + return(ret); + } + + ret = nxagentScreenBoxesQSortImpl(xorg_list_first_entry(&(split->entry), nxagentScreenBoxesElem, entry), right, (split_i + 1), right_idx, boxes); + + return(ret); +} + +/* + * Helper sorting an nxagentScreenBoxes list. + * + * No pointer parameters might be NULL. + * + * Returns true on success, otherwise false. + */ +static Bool nxagentScreenBoxesQSort(nxagentScreenBoxes *boxes) { + Bool ret = FALSE; + + if (!(boxes)) { + return(ret); + } + + if (xorg_list_is_empty(&(boxes->head))) { + ret = TRUE; + + return(ret); + } + + /* + * Questionable error handling: check that each screen_id is unique. + * + * Otherwise this implementation will crash. + * That's probably fine since having a list with duplicated screen_id entries + * is a bug in the generation code anyway. + */ + Bool unique = TRUE; + { + nxagentScreenBoxesElem *lhs = NULL; + xorg_list_for_each_entry(lhs, &(boxes->head), entry) { + nxagentScreenBoxesElem *rhs = NULL; + xorg_list_for_each_entry(rhs, &(lhs->entry), entry) { + /* Check for actual list head and break out. */ + if (&(rhs->entry) == &(boxes->head)) { + break; + } + + /* Otherwise rhs is a valid entry. */ + if (lhs->screen_id == rhs->screen_id) { + unique = FALSE; + break; + } + } + + if (!(unique)) { + /* Found at least one duplicated entry, break out. */ + break; + } + } + } + + if (!(unique)) { + return(ret); + } + + /* + * Questionable optimization: check if list is already sorted. + */ + Bool sorted = TRUE; + { + ssize_t last_screen_id = -1; + nxagentScreenBoxesElem *cur = NULL; + xorg_list_for_each_entry(cur, &(boxes->head), entry) { + if (cur->screen_id < last_screen_id) { + sorted = FALSE; + + break; + } + + last_screen_id = cur->screen_id; + } + } + + if (sorted) { + ret = TRUE; + + return(ret); + } + + /* Seed PRNG. We don't need good entropy, some is enough. */ + srand((unsigned int)(time(NULL))); + + /* Get boxes count. */ + size_t boxes_count = 0; + { + nxagentScreenBoxesElem *cur = NULL; + xorg_list_for_each_entry(cur, &(boxes->head), entry) { + ++boxes_count; + } + } + + ret = nxagentScreenBoxesQSortImpl(xorg_list_first_entry(&(boxes->head), nxagentScreenBoxesElem, entry), xorg_list_last_entry(&(boxes->head), nxagentScreenBoxesElem, entry), 0, (boxes_count - 1), boxes); + + return(ret); +} + int nxagentAdjustRandRXinerama(ScreenPtr pScreen) { rrScrPrivPtr pScrPriv; @@ -7295,13 +7568,10 @@ int nxagentAdjustRandRXinerama(ScreenPtr pScreen) xRRModeInfo modeInfo; char name[100]; int refresh = 60; - int width = nxagentOption(Width); - int height = nxagentOption(Height); pScrPriv = rrGetScrPriv(pScreen); if (pScrPriv) { - int i; int number = 0; XineramaScreenInfo *screeninfo = NULL; @@ -7310,7 +7580,7 @@ int nxagentAdjustRandRXinerama(ScreenPtr pScreen) if (number) { #ifdef DEBUG fprintf(stderr, "nxagentAdjustRandRXinerama: XineramaQueryScreens() returned [%d] screens:\n", number); - for (int i=0; i < number; i++) { + for (size_t i = 0; i < number; ++i) { fprintf(stderr, "nxagentAdjustRandRXinerama: screen_number [%d] x_org [%d] y_org [%d] width [%d] height [%d]\n", screeninfo[i].screen_number, screeninfo[i].x_org, screeninfo[i].y_org, screeninfo[i].width, screeninfo[i].height); } #endif @@ -7322,7 +7592,7 @@ int nxagentAdjustRandRXinerama(ScreenPtr pScreen) } /* - * if there's no xinerama on the real server or xinerama is + * If there's no xinerama on the real server or xinerama is * disabled in nxagent we only report one big screen. Clients * still see xinerama enabled but it will report only one (big) * screen. This is consistent with the way rrxinerama always @@ -7335,9 +7605,9 @@ int nxagentAdjustRandRXinerama(ScreenPtr pScreen) #endif number = 1; - free(screeninfo); + SAFE_FREE(screeninfo); - if (!(screeninfo = malloc(sizeof(XineramaScreenInfo)))) { + if (!(screeninfo = calloc(1, sizeof(XineramaScreenInfo)))) { return FALSE; } @@ -7363,39 +7633,122 @@ int nxagentAdjustRandRXinerama(ScreenPtr pScreen) rrgetinfo = RRGetInfo(pScreen, FALSE); fprintf(stderr, "nxagentAdjustRandRXinerama: RRGetInfo returned [%d]\n", rrgetinfo); + + const signed int x = nxagentOption(X), + y = nxagentOption(Y), + w = nxagentOption(Width), + h = nxagentOption(Height); + fprintf(stderr, "%s: nxagent window extends: [(%d, %d), (%d, %d)]\n", __func__, x, y, (x + w), (y + h)); } #else /* we are not interested in the return code */ RRGetInfo(pScreen, FALSE); #endif -#ifndef NXAGENT_RANDR_XINERAMA_CLIPPING - /* calculate bounding box (outer edges) */ - int bbx2, bbx1, bby1, bby2; - bbx2 = bby2 = 0; - bbx1 = bby1 = INT_MAX; + nxagentScreenSplits *splits = nxagentGenerateScreenSplitList(screeninfo, number); + + if (!(splits)) { + fprintf(stderr, "%s: unable to generate screen split list.\n", __func__); - for (i = 0; i < number; i++) { - bbx2 = MAX(bbx2, screeninfo[i].x_org + screeninfo[i].width); - bby2 = MAX(bby2, screeninfo[i].y_org + screeninfo[i].height); - bbx1 = MIN(bbx1, screeninfo[i].x_org); - bby1 = MIN(bby1, screeninfo[i].y_org); + SAFE_FREE(screeninfo); + + return(FALSE); + } + + nxagentScreenBoxes *all_boxes = nxagentGenerateScreenCrtcs(splits); + + /* Get rid of splits. */ + SAFE_FREE(splits->x_splits); + SAFE_FREE(splits->y_splits); + SAFE_FREE(splits); + + if ((!(all_boxes)) || xorg_list_is_empty(&(all_boxes->head))) { + fprintf(stderr, "%s: unable to generate screen boxes list from screen splitting list.\n", __func__); + + SAFE_FREE(screeninfo); + + return(FALSE); + } + + nxagentScreenCrtcsSolution *solution = nxagentMergeScreenCrtcs(all_boxes, screeninfo, number); + + /* Get rid of all_boxes. */ + nxagentFreeScreenBoxes(all_boxes, TRUE); + + SAFE_FREE(all_boxes); + + if ((!(solution)) || (!(solution->solution_boxes)) || (!(solution->all_boxes))) { + fprintf(stderr, "%s: unable to extract screen boxes from screen metadata.\n", __func__); + + SAFE_FREE(screeninfo); + + return(FALSE); + } + + /* Sort new solution boxes list based on screen ID. */ + Bool sorted = nxagentScreenBoxesQSort(solution->solution_boxes); + + if (!(sorted)) { + fprintf(stderr, "%s: unable to sort solution screen boxes based on screen IDs.\n", __func__); + + nxagentScreenCrtcsFreeSolution(solution); + + SAFE_FREE(solution); + + SAFE_FREE(screeninfo); + + return(FALSE); } - #ifdef DEBUG - fprintf(stderr, "nxagentAdjustRandRXinerama: bounding box: left [%d] right [%d] top [%d] bottom [%d]\n", bbx1, bbx2, bby1, bby2); - #endif -#endif #ifdef DEBUG fprintf(stderr, "nxagentAdjustRandRXinerama: numCrtcs [%d], numOutputs [%d]\n", pScrPriv->numCrtcs, pScrPriv->numOutputs); #endif + #ifdef WARNING + if (nxagentScreenCrtcsTiling) { + size_t old_screen_count = 0; + nxagentScreenBoxesElem *cur = NULL; + xorg_list_for_each_entry(cur, &(nxagentScreenCrtcsTiling->solution_boxes->head), entry) { + ++old_screen_count; + } + + if (old_screen_count != pScrPriv->numCrtcs) { + const unsigned long long old_screen_count_ = old_screen_count; + const signed long long cur_crtcs_count = pScrPriv->numCrtcs; + fprintf(stderr, "%s: current CRTCs count [%lld] doesn't match old tiling data [%llu]. Algorithm warning.\n", __func__, cur_crtcs_count, old_screen_count_); + } + } + #endif + + size_t new_crtcs_count = 0; + { + nxagentScreenBoxesElem *cur = NULL; + xorg_list_for_each_entry(cur, &(solution->solution_boxes->head), entry) { + ++new_crtcs_count; + } + } + /* - * adjust the number of CRTCs to match the number of reported - * xinerama screens on the real server + * Adjust the number of CRTCs to match the number of reported Xinerama + * screens on the real server that intersect the nxagent window. + */ + /* + * The number of CRTCs might not be an appropriate means of setting up + * screen splitting since old and new screen IDs might differ. Doing some + * more complicated mapping between old and new screen IDs here would be + * possible, but likely isn't needed since each CRTC here is a purely + * virtual one in the first place. + * + * Pretend we have three screens in both the old and new solutions, but the + * middle one switched IDs from 2 to 4. Doing some complicated mapping + * wouldn't really lead to a different result, since we'd need to drop and + * re-add the virtual screen with a different size anyway. Just naïvely + * matching screen counts, however, has the added benefit of less virtual + * screen removals and additions if only metadata changed, but not the + * actual virtual screens count. */ - while (number != pScrPriv->numCrtcs) { - if (number < pScrPriv->numCrtcs) { + while (new_crtcs_count != pScrPriv->numCrtcs) { + if (new_crtcs_count < pScrPriv->numCrtcs) { #ifdef DEBUG fprintf(stderr, "nxagentAdjustRandRXinerama: destroying crtc\n"); #endif @@ -7416,11 +7769,10 @@ int nxagentAdjustRandRXinerama(ScreenPtr pScreen) #endif /* - * set gamma. Currently the only reason for doing this is - * preventing the xrandr command from complaining about missing - * gamma. + * Set gamma. Currently the only reason for doing this is preventing the + * xrandr command from complaining about missing gamma. */ - for (i = 0; i < pScrPriv->numCrtcs; i++) { + for (size_t i = 0; i < pScrPriv->numCrtcs; ++i) { if (pScrPriv->crtcs[i]->gammaSize == 0) { CARD16 gamma = 0; RRCrtcGammaSetSize(pScrPriv->crtcs[i], 1); @@ -7429,22 +7781,40 @@ int nxagentAdjustRandRXinerama(ScreenPtr pScreen) } } - /* delete superfluous non-NX outputs */ - for (i = pScrPriv->numOutputs - 1; i >= 0; i--) { + /* Delete superfluous non-NX outputs. */ + for (ptrdiff_t i = pScrPriv->numOutputs - 1; i >= 0; --i) { if (strncmp(pScrPriv->outputs[i]->name, "NX", 2)) { nxagentDropOutput(pScrPriv->outputs[i]); } } - /* at this stage only NX outputs are left - we delete the superfluous ones */ - for (i = pScrPriv->numOutputs - 1; i >= number; i--) { + /* + * At this stage only NX outputs are left - we delete the superfluous + * ones. + */ + if (new_crtcs_count > (ptrdiff_t)(PTRDIFF_MAX)) { + const unsigned long long new_crtcs_count_ = new_crtcs_count; + const unsigned long long max_crtcs = PTRDIFF_MAX; + fprintf(stderr, "%s: too many screen CRTCs [%llu], supporting at most [%llu]; erroring out, but keeping old solution.\n", __func__, new_crtcs_count_, max_crtcs); + + nxagentScreenCrtcsFreeSolution(solution); + + SAFE_FREE(solution); + + SAFE_FREE(screeninfo); + + return(FALSE); + } + + for (ptrdiff_t i = pScrPriv->numOutputs - 1; i >= (ptrdiff_t)(new_crtcs_count); --i) { nxagentDropOutput(pScrPriv->outputs[i]); } - /* add and init outputs */ - for (i = 0; i < number; i++) { + /* Add and init outputs. */ + for (size_t i = 0; i < new_crtcs_count; ++i) { if (i >= pScrPriv->numOutputs) { - sprintf(name, "NX%d", i+1); + const unsigned long long i_ = i; + sprintf(name, "NX%llu", (i_ + 1)); output = RROutputCreate(pScreen, name, strlen(name), NULL); /* will be done later RROutputSetConnection(output, RR_Disconnected); @@ -7468,138 +7838,168 @@ int nxagentAdjustRandRXinerama(ScreenPtr pScreen) RROutputSetPhysicalSize(output, 0, 0); } - for (i = 0; i < pScrPriv->numOutputs; i++) { - Bool disable_output = FALSE; + nxagentScreenBoxesElem *cur_screen_box = xorg_list_first_entry(&(solution->solution_boxes->head), nxagentScreenBoxesElem, entry); + for (size_t i = 0; i < pScrPriv->numOutputs; ++i) { RRModePtr mymode = NULL, prevmode = NULL; - int new_x = 0; - int new_y = 0; - unsigned int new_w = 0; - unsigned int new_h = 0; - - /* if there's no intersection disconnect the output */ -#ifdef NXAGENT_RANDR_XINERAMA_CLIPPING - disable_output = !intersect(nxagentOption(X), nxagentOption(Y), - width, height, - screeninfo[i].x_org, screeninfo[i].y_org, - screeninfo[i].width, screeninfo[i].height, - &new_x, &new_y, &new_w, &new_h); -#else - disable_output = !intersect_bb(nxagentOption(X), nxagentOption(Y), - width, height, - screeninfo[i].x_org, screeninfo[i].y_org, - screeninfo[i].width, screeninfo[i].height, - bbx1, bby1, bbx2, bby2, - &new_x, &new_y, &new_w, &new_h); -#endif - /* save previous mode */ - prevmode = pScrPriv->crtcs[i]->mode; - #ifdef DEBUG - if (prevmode) { - fprintf(stderr, "nxagentAdjustRandRXinerama: output [%d] name [%s]: prevmode [%s] ([%p]) refcnt [%d]\n", i, pScrPriv->outputs[i]->name, prevmode->name, (void *)prevmode, prevmode->refcnt); + /* Sanity checks. */ + Bool fail = FALSE; + if (cur_screen_box->box->x1 < nxagentOption(X)) { + fprintf(stderr, "%s: left X position out of bounds - less than left window bound [%d] < [%d]\n", __func__, cur_screen_box->box->x1, nxagentOption(X)); + + fail = TRUE; } - else { - fprintf(stderr, "nxagentAdjustRandRXinerama: output [%d] name [%s]: no prevmode\n", i, pScrPriv->outputs[i]->name); + + if (cur_screen_box->box->x1 >= (nxagentOption(X) + nxagentOption(Width))) { + fprintf(stderr, "%s: left X position out of bounds - higher than or equal right window bound [%d] >= [%d]\n", __func__, cur_screen_box->box->x1, (nxagentOption(X) + nxagentOption(Width))); + + fail = TRUE; } - #endif - RROutputSetCrtcs(pScrPriv->outputs[i], &(pScrPriv->crtcs[i]), 1); + if (cur_screen_box->box->x2 <= cur_screen_box->box->x1) { + fprintf(stderr, "%s: right X position out of bounds - less than or equal left X position [%d] <= [%d]\n", __func__, cur_screen_box->box->x2, cur_screen_box->box->x1); - if (disable_output) { - #ifdef DEBUG - fprintf(stderr, "nxagentAdjustRandRXinerama: output [%d] name [%s]: no (valid) intersection - disconnecting\n", i, pScrPriv->outputs[i]->name); - #endif - RROutputSetConnection(pScrPriv->outputs[i], RR_Disconnected); + fail = TRUE; + } - /* - * Tests revealed that some window managers (e.g. LXDE) also - * take disconnected outputs into account when calculating - * stuff like wallpaper tile size and maximum window - * size. This is problematic when a disconnected output is - * smaller than any of the connected ones. Solution: unset the - * mode of the output's crtc. This also leads to xinerama not - * showing the disconnected head anymore. - */ + if (cur_screen_box->box->x2 > (nxagentOption(X) + nxagentOption(Width))) { + fprintf(stderr, "%s: right X position out of bounds - less than or equal right window bound [%d] <= [%d]\n", __func__, cur_screen_box->box->x2, (nxagentOption(X) + nxagentOption(Width))); + + fail = TRUE; + } + + if (cur_screen_box->box->y1 < nxagentOption(Y)) { + fprintf(stderr, "%s: top Y position out of bounds - less than top window bound [%d] < [%d]\n", __func__, cur_screen_box->box->y1, nxagentOption(Y)); + + fail = TRUE; + } + + if (cur_screen_box->box->y1 >= (nxagentOption(Y) + nxagentOption(Height))) { + fprintf(stderr, "%s: top Y position out of bounds - higher than or equal top window bound [%d] >= [%d]\n", __func__, cur_screen_box->box->y1, (nxagentOption(Y) + nxagentOption(Height))); + + fail = TRUE; + } + + if (cur_screen_box->box->y2 <= cur_screen_box->box->y1) { + fprintf(stderr, "%s: bottom Y position out of bounds - less than or equal top Y position [%d] <= [%d]\n", __func__, cur_screen_box->box->y2, cur_screen_box->box->y1); + + fail = TRUE; + } + + if (cur_screen_box->box->y2 > (nxagentOption(Y) + nxagentOption(Height))) { + fprintf(stderr, "%s: bottom Y position out of bounds - less than or equal bottom window bound [%d] <= [%d]\n", __func__, cur_screen_box->box->y2, (nxagentOption(Y) + nxagentOption(Height))); + + fail = TRUE; + } + + if (fail) { + nxagentScreenCrtcsFreeSolution(solution); + + SAFE_FREE(solution); + + SAFE_FREE(screeninfo); + + return(FALSE); + } + + const int new_x = (cur_screen_box->box->x1 - nxagentOption(X)), + new_y = (cur_screen_box->box->y1 - nxagentOption(Y)); + const unsigned int new_w = (cur_screen_box->box->x2 - cur_screen_box->box->x1), + new_h = (cur_screen_box->box->y2 - cur_screen_box->box->y1); + + /* Save previous mode. */ + prevmode = pScrPriv->crtcs[i]->mode; + #ifdef DEBUG + { + const unsigned long long i_ = i; if (prevmode) { - #ifdef DEBUG - fprintf(stderr, "nxagentAdjustRandRXinerama: removing mode from output [%d] name [%s]\n", i, pScrPriv->outputs[i]->name); - #endif - RROutputSetModes(pScrPriv->outputs[i], NULL, 0, 0); - - #ifdef DEBUG - fprintf(stderr, "nxagentAdjustRandRXinerama: removing mode from ctrc [%d]\n", i); - #endif - RRCrtcSet(pScrPriv->crtcs[i], NULL, 0, 0, RR_Rotate_0, 1, &(pScrPriv->outputs[i])); + fprintf(stderr, "nxagentAdjustRandRXinerama: output [%llu] name [%s]: prevmode [%s] ([%p]) refcnt [%d]\n", i_, pScrPriv->outputs[i]->name, prevmode->name, (void *)prevmode, prevmode->refcnt); + } + else { + fprintf(stderr, "nxagentAdjustRandRXinerama: output [%llu] name [%s]: no prevmode\n", i_, pScrPriv->outputs[i]->name); } } - else { - #ifdef DEBUG - fprintf(stderr, "nxagentAdjustRandRXinerama: output [%d] name [%s]: intersection is x [%d] y [%d] width [%d] height [%d]\n", i, pScrPriv->outputs[i]->name, new_x, new_y, new_w, new_h); - #endif + #endif + + /* Map output to CRTC. */ + RROutputSetCrtcs(pScrPriv->outputs[i], &(pScrPriv->crtcs[i]), 1); - RROutputSetConnection(pScrPriv->outputs[i], RR_Connected); + #ifdef DEBUG + { + const unsigned long long i_ = i; + fprintf(stderr, "nxagentAdjustRandRXinerama: output [%llu] name [%s]: CRTC is x [%d] y [%d] width [%d] height [%d]\n", i_, pScrPriv->outputs[i]->name, new_x, new_y, new_w, new_h); + } + #endif - memset(&modeInfo, '\0', sizeof(modeInfo)); + RROutputSetConnection(pScrPriv->outputs[i], RR_Connected); + + memset(&modeInfo, '\0', sizeof(modeInfo)); #ifdef NXAGENT_RANDR_MODE_PREFIX - /* - * Avoid collisions with pre-existing default modes by using a - * separate namespace. If we'd simply use XxY we could not - * distinguish between pre-existing modes which should stay - * and our own modes that should be removed after use. - */ - sprintf(name, "nx_%dx%d", new_w, new_h); + /* + * Avoid collisions with pre-existing default modes by using a + * separate namespace. If we'd simply use XxY we could not + * distinguish between pre-existing modes which should stay + * and our own modes that should be removed after use. + */ + sprintf(name, "nx_%dx%d", new_w, new_h); #else - sprintf(name, "%dx%d", new_w, new_h); + sprintf(name, "%dx%d", new_w, new_h); #endif - modeInfo.width = new_w; - modeInfo.height = new_h; - modeInfo.hTotal = new_w; - modeInfo.vTotal = new_h; - modeInfo.dotClock = ((CARD32) new_w * (CARD32) new_h * (CARD32) refresh); - modeInfo.nameLength = strlen(name); + modeInfo.width = new_w; + modeInfo.height = new_h; + modeInfo.hTotal = new_w; + modeInfo.vTotal = new_h; + modeInfo.dotClock = ((CARD32) new_w * (CARD32) new_h * (CARD32) refresh); + modeInfo.nameLength = strlen(name); - mymode = RRModeGet(&modeInfo, name); + mymode = RRModeGet(&modeInfo, name); #ifdef DEBUG + { + const unsigned long long i_ = i; if (mymode) { - fprintf(stderr, "nxagentAdjustRandRXinerama: output [%d] name [%s]: mode [%s] ([%p]) created/received, refcnt [%d]\n", i, pScrPriv->outputs[i]->name, name, (void *) mymode, mymode->refcnt); + fprintf(stderr, "nxagentAdjustRandRXinerama: output [%llu] name [%s]: mode [%s] ([%p]) created/received, refcnt [%d]\n", i_, pScrPriv->outputs[i]->name, name, (void *) mymode, mymode->refcnt); } else { /* FIXME: what is the correct behaviour in this case? */ - fprintf(stderr, "nxagentAdjustRandRXinerama: output [%d] name [%s]: mode [%s] creation failed!\n", i, pScrPriv->outputs[i]->name, name); + fprintf(stderr, "nxagentAdjustRandRXinerama: output [%llu] name [%s]: mode [%s] creation failed!\n", i_, pScrPriv->outputs[i]->name, name); } + } #endif - if (prevmode && mymode == prevmode) { - #ifdef DEBUG - fprintf(stderr, "nxagentAdjustRandRXinerama: mymode [%s] ([%p]) == prevmode [%s] ([%p])\n", mymode->name, (void *) mymode, prevmode->name, (void *)prevmode); - #endif - - /* - * If they are the same RRModeGet() has increased the - * refcnt by 1. We decrease it again by calling only - * RRModeDestroy() and forget about prevmode - */ - RRModeDestroy(mymode); - } - else { - #ifdef DEBUG - fprintf(stderr, "nxagentAdjustRandRXinerama: setting mode [%s] ([%p]) refcnt [%d] for output %d [%s]\n", mymode->name, (void *) mymode, mymode->refcnt, i, pScrPriv->outputs[i]->name); - #endif - RROutputSetModes(pScrPriv->outputs[i], &mymode, 1, 0); - } + if (prevmode && mymode == prevmode) { + #ifdef DEBUG + fprintf(stderr, "nxagentAdjustRandRXinerama: mymode [%s] ([%p]) == prevmode [%s] ([%p])\n", mymode->name, (void *) mymode, prevmode->name, (void *)prevmode); + #endif + /* + * If they are the same RRModeGet() has increased the + * refcnt by 1. We decrease it again by calling only + * RRModeDestroy() and forget about prevmode. + */ + RRModeDestroy(mymode); + } + else { #ifdef DEBUG - fprintf(stderr, "nxagentAdjustRandRXinerama: setting mode [%s] ([%p]) refcnt [%d] for crtc %d\n", mymode->name, (void *) mymode, mymode->refcnt, i); + const unsigned long long i_ = i; + fprintf(stderr, "nxagentAdjustRandRXinerama: setting mode [%s] ([%p]) refcnt [%d] for output %llu [%s]\n", mymode->name, (void *) mymode, mymode->refcnt, i_, pScrPriv->outputs[i]->name); #endif - RRCrtcSet(pScrPriv->crtcs[i], mymode, new_x, new_y, RR_Rotate_0, 1, &(pScrPriv->outputs[i])); - } /* if disable_output */ + RROutputSetModes(pScrPriv->outputs[i], &mymode, 1, 0); + } + + #ifdef DEBUG + { + const unsigned long long i_ = i; + fprintf(stderr, "nxagentAdjustRandRXinerama: setting mode [%s] ([%p]) refcnt [%d] for crtc %llu\n", mymode->name, (void *) mymode, mymode->refcnt, i_); + } + #endif + RRCrtcSet(pScrPriv->crtcs[i], mymode, new_x, new_y, RR_Rotate_0, 1, &(pScrPriv->outputs[i])); /* * Throw away the mode if otherwise unused. We do not need it * anymore. We call FreeResource() to ensure the system will not - * try to free it again on shutdown + * try to free it again on shutdown. */ if (prevmode && prevmode->refcnt == 1) { #ifdef DEBUG @@ -7610,25 +8010,36 @@ int nxagentAdjustRandRXinerama(ScreenPtr pScreen) RROutputChanged(pScrPriv->outputs[i], TRUE); RRCrtcChanged(pScrPriv->crtcs[i], TRUE); + + cur_screen_box = xorg_list_first_entry(&(cur_screen_box->entry), nxagentScreenBoxesElem, entry); } - /* release allocated memory */ - free(screeninfo); - screeninfo = NULL; + /* Update internal data. */ + nxagentScreenCrtcsSolution *old_solution = nxagentScreenCrtcsTiling; + nxagentScreenCrtcsTiling = solution; + + /* Release allocated memory. */ + nxagentScreenCrtcsFreeSolution(old_solution); + + SAFE_FREE(old_solution); + + SAFE_FREE(screeninfo); #ifdef DEBUG - for (i = 0; i < pScrPriv->numCrtcs; i++) { + for (size_t i = 0; i < pScrPriv->numCrtcs; ++i) { + const unsigned long long i_ = i; RRModePtr mode = pScrPriv->crtcs[i]->mode; if (mode) { - fprintf(stderr, "nxagentAdjustRandRXinerama: crtc [%d] ([%p]) has mode [%s] ([%p]), refcnt [%d] and [%d] outputs:\n", i, (void *) pScrPriv->crtcs[i], pScrPriv->crtcs[i]->mode->name, (void *)pScrPriv->crtcs[i]->mode, pScrPriv->crtcs[i]->mode->refcnt, pScrPriv->crtcs[i]->numOutputs); + fprintf(stderr, "nxagentAdjustRandRXinerama: crtc [%llu] ([%p]) has mode [%s] ([%p]), refcnt [%d] and [%d] outputs:\n", i_, (void *) pScrPriv->crtcs[i], pScrPriv->crtcs[i]->mode->name, (void *)pScrPriv->crtcs[i]->mode, pScrPriv->crtcs[i]->mode->refcnt, pScrPriv->crtcs[i]->numOutputs); } else { - fprintf(stderr, "nxagentAdjustRandRXinerama: crtc [%d] ([%p]) has no mode and [%d] outputs:\n", i, (void *) pScrPriv->crtcs[i], pScrPriv->crtcs[i]->numOutputs); + fprintf(stderr, "nxagentAdjustRandRXinerama: crtc [%llu] ([%p]) has no mode and [%d] outputs:\n", i_, (void *) pScrPriv->crtcs[i], pScrPriv->crtcs[i]->numOutputs); } if (pScrPriv->crtcs[i]->numOutputs > 0) { - for (int j=0; j < pScrPriv->crtcs[i]->numOutputs; j++) { - fprintf(stderr, "nxagentAdjustRandRXinerama: output [%d] name [%s]->crtc=[%p]\n", j, pScrPriv->crtcs[i]->outputs[j]->name, (void *)pScrPriv->crtcs[i]->outputs[j]->crtc); + for (size_t j = 0; j < pScrPriv->crtcs[i]->numOutputs; ++j) { + const unsigned long long j_ = j; + fprintf(stderr, "nxagentAdjustRandRXinerama: output [%llu] name [%s]->crtc=[%p]\n", j_, pScrPriv->crtcs[i]->outputs[j]->name, (void *)pScrPriv->crtcs[i]->outputs[j]->crtc); } } } -- Alioth's /home/x2go-admin/maintenancescripts/git/hooks/post-receive-email on /srv/git/code.x2go.org/nx-libs.git

This is an automated email from the git hooks/post-receive script. x2go pushed a commit to branch 3.6.x-rpm-debug in repository nx-libs. commit 89d5467acb2d318cf155fa50128f4f600995980b Author: Mihai Moldovan <ionic@ionic.de> Date: Tue May 1 18:01:37 2018 +0200 nx-X11/programs/Xserver/hw/nxagent/Screen.c: add debugging to intersect for non-feasible intersections. --- nx-X11/programs/Xserver/hw/nxagent/Screen.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/nx-X11/programs/Xserver/hw/nxagent/Screen.c b/nx-X11/programs/Xserver/hw/nxagent/Screen.c index ef3a47e..a11ce35 100644 --- a/nx-X11/programs/Xserver/hw/nxagent/Screen.c +++ b/nx-X11/programs/Xserver/hw/nxagent/Screen.c @@ -3659,7 +3659,7 @@ static Bool intersect(int ax1, int ay1, unsigned int aw, unsigned int ah, if (iw <= 0 || ih <= 0) { #ifdef DEBUG - fprintf(stderr, "intersect: intersection rectangle not feasible\n"); + fprintf(stderr, "%s: intersection rectangle not feasible: width [%u], calculated as ([%d] - [%d]) [%u]; height [%u], calculated as ([%d] - [%d]) [%u]\n", __func__, iw, tx2, tx1, (tx2 - tx1), ih, ty2, ty1, (ty2 - ty1)); #endif return FALSE; -- Alioth's /home/x2go-admin/maintenancescripts/git/hooks/post-receive-email on /srv/git/code.x2go.org/nx-libs.git

This is an automated email from the git hooks/post-receive script. x2go pushed a commit to branch 3.6.x-rpm-debug in repository nx-libs. commit 9f4781f210b85e3624e542a790893c1d71fbea2e Author: Mihai Moldovan <ionic@ionic.de> Date: Tue May 1 23:46:02 2018 +0200 nx-X11/programs/Xserver/hw/nxagent/Screen.c: fix intersection break-out. --- nx-X11/programs/Xserver/hw/nxagent/Screen.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/nx-X11/programs/Xserver/hw/nxagent/Screen.c b/nx-X11/programs/Xserver/hw/nxagent/Screen.c index a11ce35..5a09cdb 100644 --- a/nx-X11/programs/Xserver/hw/nxagent/Screen.c +++ b/nx-X11/programs/Xserver/hw/nxagent/Screen.c @@ -3636,8 +3636,7 @@ static Bool intersect(int ax1, int ay1, unsigned int aw, unsigned int ah, /* thanks to http://silentmatt.com/rectangle-intersection */ /* check if there's any intersection at all */ - if (ax2 < bx1 || bx2 < ax1 || ay2 < by1 || by2 < ay1) { - + if ((ax1 >= bx2) || (ax2 <= bx1) || (ay1 >= by2) || (ay2 <= by1)) { #ifdef DEBUG fprintf(stderr, "intersect: the given rectangles do not intersect at all\n"); #endif -- Alioth's /home/x2go-admin/maintenancescripts/git/hooks/post-receive-email on /srv/git/code.x2go.org/nx-libs.git

This is an automated email from the git hooks/post-receive script. x2go pushed a commit to branch 3.6.x-rpm-debug in repository nx-libs. commit 287338f39634b045d7059552bcedf8459cfb0618 Author: Mihai Moldovan <ionic@ionic.de> Date: Mon Jun 4 09:38:50 2018 +0200 nx-X11/programs/Xserver/hw/nxagent/Screen.c: fix boolean vs. logical operator typo. --- nx-X11/programs/Xserver/hw/nxagent/Screen.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/nx-X11/programs/Xserver/hw/nxagent/Screen.c b/nx-X11/programs/Xserver/hw/nxagent/Screen.c index 5a09cdb..5c4bc8e 100644 --- a/nx-X11/programs/Xserver/hw/nxagent/Screen.c +++ b/nx-X11/programs/Xserver/hw/nxagent/Screen.c @@ -8345,7 +8345,7 @@ void nxagentPrintGeometry(void) for (i = 0; i < screenInfo.numScreens; i++) { - if (nxagentPrintGeometryFlags && (1 << i)) + if (nxagentPrintGeometryFlags & (1 << i)) { fprintf(stderr, "Info: Screen [%d] resized to geometry [%dx%d] " "fullscreen [%d].\n", i, screenInfo.screens[i] -> width, -- Alioth's /home/x2go-admin/maintenancescripts/git/hooks/post-receive-email on /srv/git/code.x2go.org/nx-libs.git