mirror of
https://github.com/Bloodysharp/ImGui-Loader.git
synced 2024-12-22 16:07:25 +08:00
50 lines
3.5 KiB
C++
50 lines
3.5 KiB
C++
// dear imgui: FreeType font builder (used as a replacement for the stb_truetype builder)
|
|
// (headers)
|
|
|
|
#pragma once
|
|
|
|
#include "imgui.h" // IMGUI_API
|
|
|
|
// Forward declarations
|
|
struct ImFontAtlas;
|
|
struct ImFontBuilderIO;
|
|
|
|
// Hinting greatly impacts visuals (and glyph sizes).
|
|
// - By default, hinting is enabled and the font's native hinter is preferred over the auto-hinter.
|
|
// - When disabled, FreeType generates blurrier glyphs, more or less matches the stb_truetype.h
|
|
// - The Default hinting mode usually looks good, but may distort glyphs in an unusual way.
|
|
// - The Light hinting mode generates fuzzier glyphs but better matches Microsoft's rasterizer.
|
|
// You can set those flags globaly in ImFontAtlas::FontBuilderFlags
|
|
// You can set those flags on a per font basis in ImFontConfig::FontBuilderFlags
|
|
enum ImGuiFreeTypeBuilderFlags
|
|
{
|
|
ImGuiFreeTypeBuilderFlags_NoHinting = 1 << 0, // Disable hinting. This generally generates 'blurrier' bitmap glyphs when the glyph are rendered in any of the anti-aliased modes.
|
|
ImGuiFreeTypeBuilderFlags_NoAutoHint = 1 << 1, // Disable auto-hinter.
|
|
ImGuiFreeTypeBuilderFlags_ForceAutoHint = 1 << 2, // Indicates that the auto-hinter is preferred over the font's native hinter.
|
|
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.
|
|
ImGuiFreeTypeBuilderFlags_MonoHinting = 1 << 4, // Strong hinting algorithm that should only be used for monochrome output.
|
|
ImGuiFreeTypeBuilderFlags_Bold = 1 << 5, // Styling: Should we artificially embolden the font?
|
|
ImGuiFreeTypeBuilderFlags_Oblique = 1 << 6, // Styling: Should we slant the font, emulating italic style?
|
|
ImGuiFreeTypeBuilderFlags_Monochrome = 1 << 7, // Disable anti-aliasing. Combine this with MonoHinting for best results!
|
|
ImGuiFreeTypeBuilderFlags_LoadColor = 1 << 8, // Enable FreeType color-layered glyphs
|
|
ImGuiFreeTypeBuilderFlags_Bitmap = 1 << 9 // Enable FreeType bitmap glyphs
|
|
};
|
|
|
|
namespace ImGuiFreeType
|
|
{
|
|
// This is automatically assigned when using '#define IMGUI_ENABLE_FREETYPE'.
|
|
// If you need to dynamically select between multiple builders:
|
|
// - you can manually assign this builder with 'atlas->FontBuilderIO = ImGuiFreeType::GetBuilderForFreeType()'
|
|
// - prefer deep-copying this into your own ImFontBuilderIO instance if you use hot-reloading that messes up static data.
|
|
IMGUI_API const ImFontBuilderIO* GetBuilderForFreeType();
|
|
|
|
// Override allocators. By default ImGuiFreeType will use IM_ALLOC()/IM_FREE()
|
|
// However, as FreeType does lots of allocations we provide a way for the user to redirect it to a separate memory heap if desired.
|
|
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);
|
|
|
|
// Obsolete names (will be removed soon)
|
|
// Prefer using '#define IMGUI_ENABLE_FREETYPE'
|
|
#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
|
|
static inline bool BuildFontAtlas(ImFontAtlas* atlas, unsigned int flags = 0) { atlas->FontBuilderIO = GetBuilderForFreeType(); atlas->FontBuilderFlags = flags; return atlas->Build(); }
|
|
#endif
|
|
} |