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Rebased imstb_rectpack on stb_rect_pack v1.00.

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Tommy Nguyen 2019-08-27 22:40:34 +02:00 committed by omar
parent cb538fadfe
commit bcdb89ab07
2 changed files with 15 additions and 4 deletions
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2
docs/CHANGELOG.txt
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@ -46,6 +46,8 @@ Other Changes:
- Backends: Vulkan: Added support for specifying multisample count. - Backends: Vulkan: Added support for specifying multisample count.
Set ImGui_ImplVulkan_InitInfo::MSAASamples to one of the VkSampleCountFlagBits values Set ImGui_ImplVulkan_InitInfo::MSAASamples to one of the VkSampleCountFlagBits values
to use, default is non-multisampled as before. (#2705, #2706) [@vilya] to use, default is non-multisampled as before. (#2705, #2706) [@vilya]
- Misc: Updated stb_rect_pack from 0.99 to 1.00 (fixes by @rygorous: off-by-1 bug in best-fit heuristic,
fix handling of rectangles too large to fit inside texture). (#2762) [@tido64]
----------------------------------------------------------------------- -----------------------------------------------------------------------

17
imstb_rectpack.h
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@ -1,10 +1,10 @@
// [DEAR IMGUI] // [DEAR IMGUI]
// This is a slightly modified version of stb_rect_pack.h 0.99. // This is a slightly modified version of stb_rect_pack.h 1.00.
// Those changes would need to be pushed into nothings/stb: // Those changes would need to be pushed into nothings/stb:
// - Added STBRP__CDECL // - Added STBRP__CDECL
// Grep for [DEAR IMGUI] to find the changes. // Grep for [DEAR IMGUI] to find the changes.
// stb_rect_pack.h - v0.99 - public domain - rectangle packing // stb_rect_pack.h - v1.00 - public domain - rectangle packing
// Sean Barrett 2014 // Sean Barrett 2014
// //
// Useful for e.g. packing rectangular textures into an atlas. // Useful for e.g. packing rectangular textures into an atlas.
@ -37,9 +37,11 @@
// //
// Bugfixes / warning fixes // Bugfixes / warning fixes
// Jeremy Jaussaud // Jeremy Jaussaud
// Fabian Giesen
// //
// Version history: // Version history:
// //
// 1.00 (2019-02-25) avoid small space waste; gracefully fail too-wide rectangles
// 0.99 (2019-02-07) warning fixes // 0.99 (2019-02-07) warning fixes
// 0.11 (2017-03-03) return packing success/fail result // 0.11 (2017-03-03) return packing success/fail result
// 0.10 (2016-10-25) remove cast-away-const to avoid warnings // 0.10 (2016-10-25) remove cast-away-const to avoid warnings
@ -357,6 +359,13 @@ static stbrp__findresult stbrp__skyline_find_best_pos(stbrp_context *c, int widt
width -= width % c->align; width -= width % c->align;
STBRP_ASSERT(width % c->align == 0); STBRP_ASSERT(width % c->align == 0);
// if it can't possibly fit, bail immediately
if (width > c->width || height > c->height) {
fr.prev_link = NULL;
fr.x = fr.y = 0;
return fr;
}
node = c->active_head; node = c->active_head;
prev = &c->active_head; prev = &c->active_head;
while (node->x + width <= c->width) { while (node->x + width <= c->width) {
@ -420,7 +429,7 @@ static stbrp__findresult stbrp__skyline_find_best_pos(stbrp_context *c, int widt
} }
STBRP_ASSERT(node->next->x > xpos && node->x <= xpos); STBRP_ASSERT(node->next->x > xpos && node->x <= xpos);
y = stbrp__skyline_find_min_y(c, node, xpos, width, &waste); y = stbrp__skyline_find_min_y(c, node, xpos, width, &waste);
if (y + height < c->height) { if (y + height <= c->height) {
if (y <= best_y) { if (y <= best_y) {
if (y < best_y || waste < best_waste || (waste==best_waste && xpos < best_x)) { if (y < best_y || waste < best_waste || (waste==best_waste && xpos < best_x)) {
best_x = xpos; best_x = xpos;