71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
#ifndef FONT_RENDERER_H
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#define FONT_RENDERER_H
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct {
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unsigned short x0, y0, x1, y1;
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float xoff, yoff, xadvance;
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} FR_Bitmap_Glyph_Metrics;
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typedef struct FR_Bitmap FR_Bitmap;
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struct FR_Impl;
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typedef struct FR_Impl FontRenderer;
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enum {
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FONT_RENDERER_HINTING = 1 << 0,
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FONT_RENDERER_KERNING = 1 << 1,
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FONT_RENDERER_SUBPIXEL = 1 << 2,
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};
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typedef struct {
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uint8_t r, g, b;
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} FR_Color;
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typedef struct {
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int left, top, right, bottom;
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} FR_Clip_Area;
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FontRenderer * FR_New(unsigned int flags, float gamma);
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void FR_Free(FontRenderer *);
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int FR_Load_Font(FontRenderer *, const char *filename);
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int FR_Get_Font_Height(FontRenderer *, float size);
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int FR_Bake_Font_Bitmap(FontRenderer *, int font_height,
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FR_Bitmap *image,
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int first_char, int num_chars, FR_Bitmap_Glyph_Metrics *glyph_info,
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int subpixel_scale);
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#if 0
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// FIXME: this function needs to be updated to match BlendGammaSubpixel.
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void FR_Blend_Gamma(FontRenderer *,
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uint8_t *dst, int dst_stride,
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uint8_t *src, int src_stride,
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int region_width, int region_height,
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FR_Color color);
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#endif
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void FR_Blend_Gamma_Subpixel(FontRenderer *font_renderer,
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FR_Clip_Area *clip, int x, int y,
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uint8_t *dst, int dst_width,
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const FR_Bitmap *glyphs_bitmap,
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const FR_Bitmap_Glyph_Metrics *glyph, FR_Color color);
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FR_Bitmap* FR_Bitmap_New(int width, int height, int subpixel_scale);
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void FR_Bitmap_Free(FR_Bitmap *image);
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#ifdef __cplusplus
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}
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#endif
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#endif
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