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Fonts: Rework ImFontLoader signatures.

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InitBaked may return false to signify this size is not supported.
This commit is contained in:
ocornut
2025-02-07 18:48:01 +01:00
parent c06a7585a3
commit 18c8a93cca
3 changed files with 22 additions and 27 deletions
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22
misc/freetype/imgui_freetype.cpp
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@@ -437,7 +437,7 @@ void ImGui_ImplFreeType_FontSrcDestroy(ImFontAtlas* atlas, ImFontConfig* src)
src->FontLoaderData = NULL;
}
void ImGui_ImplFreeType_FontBakedInit(ImFontAtlas* atlas, ImFontConfig* src, ImFontBaked* baked, void* loader_data_for_baked_src)
bool ImGui_ImplFreeType_FontBakedInit(ImFontAtlas* atlas, ImFontConfig* src, ImFontBaked* baked, void* loader_data_for_baked_src)
{
IM_UNUSED(atlas);
const float size = baked->Size;
@@ -479,6 +479,7 @@ void ImGui_ImplFreeType_FontBakedInit(ImFontAtlas* atlas, ImFontConfig* src, ImF
baked->Ascent = bd_baked_data->Ascender;
baked->Descent = bd_baked_data->Descender;
}
return true;
}
void ImGui_ImplFreeType_FontBakedDestroy(ImFontAtlas* atlas, ImFontConfig* src, ImFontBaked* baked, void* loader_data_for_baked_src)
@@ -492,12 +493,12 @@ void ImGui_ImplFreeType_FontBakedDestroy(ImFontAtlas* atlas, ImFontConfig* src,
bd_baked_data->~ImGui_ImplFreeType_FontSrcBakedData(); // ~IM_PLACEMENT_DELETE()
}
bool ImGui_ImplFreeType_FontBakedAddGlyph(ImFontAtlas* atlas, ImFontConfig* src, ImFontBaked* baked, void* loader_data_for_baked_src, ImWchar codepoint)
ImFontGlyph* ImGui_ImplFreeType_FontBakedLoadGlyph(ImFontAtlas* atlas, ImFontConfig* src, ImFontBaked* baked, void* loader_data_for_baked_src, ImWchar codepoint)
{
ImGui_ImplFreeType_FontSrcData* bd_font_data = (ImGui_ImplFreeType_FontSrcData*)src->FontLoaderData;
uint32_t glyph_index = FT_Get_Char_Index(bd_font_data->FtFace, codepoint);
if (glyph_index == 0)
return false; // Not found
return NULL;
if (bd_font_data->BakedLastActivated != baked)
{
@@ -509,18 +510,15 @@ bool ImGui_ImplFreeType_FontBakedAddGlyph(ImFontAtlas* atlas, ImFontConfig* src,
const FT_Glyph_Metrics* metrics = bd_font_data->LoadGlyph(codepoint);
if (metrics == NULL)
return false;
return NULL;
// Render glyph into a bitmap (currently held by FreeType)
FT_Face face = bd_font_data->FtFace;
FT_GlyphSlot slot = face->glyph;
FT_Error error = FT_Render_Glyph(slot, bd_font_data->RenderMode);
if (error != 0)
return false;
const FT_Bitmap* ft_bitmap = &slot->bitmap;
if (ft_bitmap == nullptr)
return false;
if (error != 0 || ft_bitmap == nullptr)
return NULL;
const int w = (int)ft_bitmap->width;
const int h = (int)ft_bitmap->rows;
@@ -540,7 +538,7 @@ bool ImGui_ImplFreeType_FontBakedAddGlyph(ImFontAtlas* atlas, ImFontConfig* src,
{
// Pathological out of memory case (TexMaxWidth/TexMaxHeight set too small?)
IM_ASSERT_USER_ERROR(pack_id >= 0, "Out of texture memory.");
return false;
return NULL;
}
ImFontAtlasRect* r = ImFontAtlasPackGetRect(atlas, pack_id);
@@ -576,7 +574,7 @@ bool ImGui_ImplFreeType_FontBakedAddGlyph(ImFontAtlas* atlas, ImFontConfig* src,
{
glyph = ImFontAtlasBakedAddFontGlyph(atlas, baked, src, glyph);
}
return true;
return glyph;
}
bool ImGui_ImplFreetype_FontSrcContainsGlyph(ImFontAtlas* atlas, ImFontConfig* src, ImWchar codepoint)
@@ -598,7 +596,7 @@ const ImFontLoader* ImGuiFreeType::GetFontLoader()
loader.FontSrcContainsGlyph = ImGui_ImplFreetype_FontSrcContainsGlyph;
loader.FontBakedInit = ImGui_ImplFreeType_FontBakedInit;
loader.FontBakedDestroy = ImGui_ImplFreeType_FontBakedDestroy;
loader.FontBakedAddGlyph = ImGui_ImplFreeType_FontBakedAddGlyph;
loader.FontBakedLoadGlyph = ImGui_ImplFreeType_FontBakedLoadGlyph;
loader.FontBakedSrcLoaderDataSize = sizeof(ImGui_ImplFreeType_FontSrcBakedData);
return &loader;
}