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Fonts: Assert that in each GlyphRanges[] pairs first is <= second.

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This commit is contained in:
ocornut
2023-02-14 15:00:12 +01:00
parent f0ac68ad35
commit 092b6825ac
4 changed files with 12 additions and 1 deletions
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1
docs/CHANGELOG.txt
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@@ -84,6 +84,7 @@ All changes:
- Menus: Fixed layout of MenuItem()/BeginMenu() when label contains a '\n'. (#6116) [@imkcy9]
- PlotHistogram, PlotLines: Passing negative sizes honor alignment like other widgets.
- Combo: Allow SetNextWindowSize() to alter combo popup size. (#6130)
- Fonts: Assert that in each GlyphRanges[] pairs first is <= second.
- ImDrawList: Added missing early-out in AddPolyline() and AddConvexPolyFilled() when
color alpha is zero.
- Misc: Most text functions treat "%s" as a shortcut to no-formatting. (#3466)

2
imgui.h
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@@ -2664,7 +2664,7 @@ struct ImFontConfig
bool PixelSnapH; // false // Align every glyph to pixel boundary. Useful e.g. if you are merging a non-pixel aligned font with the default font. If enabled, you can set OversampleH/V to 1.
ImVec2 GlyphExtraSpacing; // 0, 0 // Extra spacing (in pixels) between glyphs. Only X axis is supported for now.
ImVec2 GlyphOffset; // 0, 0 // Offset all glyphs from this font input.
const ImWchar* GlyphRanges; // NULL // Pointer to a user-provided list of Unicode range (2 value per range, values are inclusive, zero-terminated list). THE ARRAY DATA NEEDS TO PERSIST AS LONG AS THE FONT IS ALIVE.
const ImWchar* GlyphRanges; // NULL // THE ARRAY DATA NEEDS TO PERSIST AS LONG AS THE FONT IS ALIVE. Pointer to a user-provided list of Unicode range (2 value per range, values are inclusive, zero-terminated list).
float GlyphMinAdvanceX; // 0 // Minimum AdvanceX for glyphs, set Min to align font icons, set both Min/Max to enforce mono-space font
float GlyphMaxAdvanceX; // FLT_MAX // Maximum AdvanceX for glyphs
bool MergeMode; // false // Merge into previous ImFont, so you can combine multiple inputs font into one ImFont (e.g. ASCII font + icons + Japanese glyphs). You may want to use GlyphOffset.y when merge font of different heights.

5
imgui_draw.cpp
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@@ -2384,7 +2384,12 @@ static bool ImFontAtlasBuildWithStbTruetype(ImFontAtlas* atlas)
ImFontBuildDstData& dst_tmp = dst_tmp_array[src_tmp.DstIndex];
src_tmp.SrcRanges = cfg.GlyphRanges ? cfg.GlyphRanges : atlas->GetGlyphRangesDefault();
for (const ImWchar* src_range = src_tmp.SrcRanges; src_range[0] && src_range[1]; src_range += 2)
{
// Check for valid range. This may also help detect *some* dangling pointers, because a common
// user error is to setup ImFontConfig::GlyphRanges with a pointer to data that isn't persistent.
IM_ASSERT(src_range[0] <= src_range[1]);
src_tmp.GlyphsHighest = ImMax(src_tmp.GlyphsHighest, (int)src_range[1]);
}
dst_tmp.SrcCount++;
dst_tmp.GlyphsHighest = ImMax(dst_tmp.GlyphsHighest, src_tmp.GlyphsHighest);
}

5
misc/freetype/imgui_freetype.cpp
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@@ -444,7 +444,12 @@ bool ImFontAtlasBuildWithFreeTypeEx(FT_Library ft_library, ImFontAtlas* atlas, u
ImFontBuildDstDataFT& dst_tmp = dst_tmp_array[src_tmp.DstIndex];
src_tmp.SrcRanges = cfg.GlyphRanges ? cfg.GlyphRanges : atlas->GetGlyphRangesDefault();
for (const ImWchar* src_range = src_tmp.SrcRanges; src_range[0] && src_range[1]; src_range += 2)
{
// Check for valid range. This may also help detect *some* dangling pointers, because a common
// user error is to setup ImFontConfig::GlyphRanges with a pointer to data that isn't persistent.
IM_ASSERT(src_range[0] <= src_range[1]);
src_tmp.GlyphsHighest = ImMax(src_tmp.GlyphsHighest, (int)src_range[1]);
}
dst_tmp.SrcCount++;
dst_tmp.GlyphsHighest = ImMax(dst_tmp.GlyphsHighest, src_tmp.GlyphsHighest);
}