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imgui_freetype: fixed issue where glyph advances would incorrectly be snapped to pixels.

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ocornut
2025-01-16 17:42:00 +01:00
parent 007735737a
commit 4c64ba16c5
2 changed files with 8 additions and 4 deletions
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8
misc/freetype/imgui_freetype.cpp
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@@ -104,6 +104,9 @@ static FT_Error ImGuiLunasvgPortPresetSlot(FT_GlyphSlot slot, FT_Bool cache, FT_
// Code
//-------------------------------------------------------------------------
#define FT_CEIL(X) (((X + 63) & -64) / 64) // From SDL_ttf: Handy routines for converting from fixed point
#define FT_SCALEFACTOR 64.0f
namespace
{
// Glyph metrics:
@@ -182,9 +185,6 @@ namespace
float InvRasterizationDensity;
};
// From SDL_ttf: Handy routines for converting from fixed point
#define FT_CEIL(X) (((X + 63) & -64) / 64)
bool FreeTypeFont::InitFont(FT_Library ft_library, const ImFontConfig& cfg, unsigned int extra_font_builder_flags)
{
FT_Error error = FT_New_Memory_Face(ft_library, (uint8_t*)cfg.FontData, (uint32_t)cfg.FontDataSize, (uint32_t)cfg.FontNo, &Face);
@@ -316,7 +316,7 @@ namespace
out_glyph_info->Height = (int)ft_bitmap->rows;
out_glyph_info->OffsetX = Face->glyph->bitmap_left;
out_glyph_info->OffsetY = -Face->glyph->bitmap_top;
out_glyph_info->AdvanceX = (float)FT_CEIL(slot->advance.x);
out_glyph_info->AdvanceX = (float)slot->advance.x / FT_SCALEFACTOR;
out_glyph_info->IsColored = (ft_bitmap->pixel_mode == FT_PIXEL_MODE_BGRA);
return ft_bitmap;