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WIP - Texture resizing favor growing height, halve pack nodes.

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ocornut 2025-01-28 14:31:13 +01:00
parent e901924f01
commit 8fab706f31
1 changed files with 5 additions and 4 deletions
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9
imgui_draw.cpp
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@ -3841,9 +3841,10 @@ void ImFontAtlasBuildGrowTexture(ImFontAtlas* atlas, int old_tex_w, int old_tex_
IM_ASSERT(ImIsPowerOfTwo(atlas->TexMinWidth) && ImIsPowerOfTwo(atlas->TexMaxWidth) && ImIsPowerOfTwo(atlas->TexMinHeight) && ImIsPowerOfTwo(atlas->TexMaxHeight));
// Grow texture so it follows roughly a square.
// Caller should be taking account of RectsDiscardedSurface and may not need to grow.
int new_tex_w = (old_tex_h < old_tex_w) ? old_tex_w : old_tex_w * 2;
int new_tex_h = (old_tex_h < old_tex_w) ? old_tex_h * 2 : old_tex_h;
// - Grow height before width, as width imply more packing nodes.
// - Caller should be taking account of RectsDiscardedSurface and may not need to grow.
int new_tex_w = (old_tex_h <= old_tex_w) ? old_tex_w : old_tex_w * 2;
int new_tex_h = (old_tex_h <= old_tex_w) ? old_tex_h * 2 : old_tex_h;
// Handle minimum size first (for pathologically large packed rects)
const int pack_padding = atlas->TexGlyphPadding;
@ -3993,7 +3994,7 @@ void ImFontAtlasPackInit(ImFontAtlas * atlas)
ImFontAtlasBuilder* builder = atlas->Builder;
// In theory we could decide to reduce the number of nodes, e.g. halve them, and waste a little texture space, but it doesn't seem worth it.
const int pack_node_count = tex->Width;
const int pack_node_count = tex->Width / 2;
builder->PackNodes.resize(pack_node_count);
IM_STATIC_ASSERT(sizeof(stbrp_context) <= sizeof(stbrp_context_opaque));
stbrp_init_target((stbrp_context*)(void*)&builder->PackContext, tex->Width, tex->Height, builder->PackNodes.Data, builder->PackNodes.Size);