mirror of
https://github.com/Bloodysharp/ImGui-Loader.git
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50 lines
3.5 KiB
C
50 lines
3.5 KiB
C
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// dear imgui: FreeType font builder (used as a replacement for the stb_truetype builder)
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// (headers)
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#pragma once
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#include "imgui.h" // IMGUI_API
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// Forward declarations
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struct ImFontAtlas;
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struct ImFontBuilderIO;
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// Hinting greatly impacts visuals (and glyph sizes).
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// - By default, hinting is enabled and the font's native hinter is preferred over the auto-hinter.
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// - When disabled, FreeType generates blurrier glyphs, more or less matches the stb_truetype.h
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// - The Default hinting mode usually looks good, but may distort glyphs in an unusual way.
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// - The Light hinting mode generates fuzzier glyphs but better matches Microsoft's rasterizer.
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// You can set those flags globaly in ImFontAtlas::FontBuilderFlags
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// You can set those flags on a per font basis in ImFontConfig::FontBuilderFlags
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enum ImGuiFreeTypeBuilderFlags
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{
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ImGuiFreeTypeBuilderFlags_NoHinting = 1 << 0, // Disable hinting. This generally generates 'blurrier' bitmap glyphs when the glyph are rendered in any of the anti-aliased modes.
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ImGuiFreeTypeBuilderFlags_NoAutoHint = 1 << 1, // Disable auto-hinter.
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ImGuiFreeTypeBuilderFlags_ForceAutoHint = 1 << 2, // Indicates that the auto-hinter is preferred over the font's native hinter.
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ImGuiFreeTypeBuilderFlags_LightHinting = 1 << 3, // A lighter hinting algorithm for gray-level modes. Many generated glyphs are fuzzier but better resemble their original shape. This is achieved by snapping glyphs to the pixel grid only vertically (Y-axis), as is done by Microsoft's ClearType and Adobe's proprietary font renderer. This preserves inter-glyph spacing in horizontal text.
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ImGuiFreeTypeBuilderFlags_MonoHinting = 1 << 4, // Strong hinting algorithm that should only be used for monochrome output.
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ImGuiFreeTypeBuilderFlags_Bold = 1 << 5, // Styling: Should we artificially embolden the font?
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ImGuiFreeTypeBuilderFlags_Oblique = 1 << 6, // Styling: Should we slant the font, emulating italic style?
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ImGuiFreeTypeBuilderFlags_Monochrome = 1 << 7, // Disable anti-aliasing. Combine this with MonoHinting for best results!
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ImGuiFreeTypeBuilderFlags_LoadColor = 1 << 8, // Enable FreeType color-layered glyphs
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ImGuiFreeTypeBuilderFlags_Bitmap = 1 << 9 // Enable FreeType bitmap glyphs
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};
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namespace ImGuiFreeType
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{
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// This is automatically assigned when using '#define IMGUI_ENABLE_FREETYPE'.
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// If you need to dynamically select between multiple builders:
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// - you can manually assign this builder with 'atlas->FontBuilderIO = ImGuiFreeType::GetBuilderForFreeType()'
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// - prefer deep-copying this into your own ImFontBuilderIO instance if you use hot-reloading that messes up static data.
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IMGUI_API const ImFontBuilderIO* GetBuilderForFreeType();
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// Override allocators. By default ImGuiFreeType will use IM_ALLOC()/IM_FREE()
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// However, as FreeType does lots of allocations we provide a way for the user to redirect it to a separate memory heap if desired.
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IMGUI_API void SetAllocatorFunctions(void* (*alloc_func)(size_t sz, void* user_data), void (*free_func)(void* ptr, void* user_data), void* user_data = NULL);
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// Obsolete names (will be removed soon)
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// Prefer using '#define IMGUI_ENABLE_FREETYPE'
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#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
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static inline bool BuildFontAtlas(ImFontAtlas* atlas, unsigned int flags = 0) { atlas->FontBuilderIO = GetBuilderForFreeType(); atlas->FontBuilderFlags = flags; return atlas->Build(); }
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#endif
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}
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