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93 lines
2.6 KiB
C
93 lines
2.6 KiB
C
#ifndef __GSK_GL_GLYPH_CACHE_PRIVATE_H__
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#define __GSK_GL_GLYPH_CACHE_PRIVATE_H__
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#include "gskgldriverprivate.h"
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#include "gskglimageprivate.h"
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#include "gskgltextureatlasprivate.h"
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#include <pango/pango.h>
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#include <gdk/gdk.h>
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typedef struct
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{
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int ref_count;
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GdkDisplay *display;
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GHashTable *hash_table;
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GskGLTextureAtlases *atlases;
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int timestamp;
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} GskGLGlyphCache;
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struct _CacheKeyData
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{
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PangoFont *font;
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PangoGlyph glyph;
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guint xshift : 3;
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guint yshift : 3;
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guint scale : 26; /* times 1024 */
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};
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typedef struct _CacheKeyData CacheKeyData;
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struct _GlyphCacheKey
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{
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CacheKeyData data;
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guint hash;
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};
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typedef struct _GlyphCacheKey GlyphCacheKey;
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#define PHASE(x) ((int)(floor (4 * (x + 0.125)) - 4 * floor (x + 0.125)))
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static inline void
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glyph_cache_key_set_glyph_and_shift (GlyphCacheKey *key,
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PangoGlyph glyph,
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float x,
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float y)
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{
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key->data.glyph = glyph;
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key->data.xshift = PHASE (x);
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key->data.yshift = PHASE (y);
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key->hash = GPOINTER_TO_UINT (key->data.font) ^
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key->data.glyph ^
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(key->data.xshift << 24) ^
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(key->data.yshift << 26) ^
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key->data.scale;
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}
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typedef struct _GskGLCachedGlyph GskGLCachedGlyph;
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struct _GskGLCachedGlyph
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{
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GskGLTextureAtlas *atlas;
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guint texture_id;
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float tx;
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float ty;
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float tw;
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float th;
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int draw_x;
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int draw_y;
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int draw_width;
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int draw_height;
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guint accessed : 1; /* accessed since last check */
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guint used : 1; /* accounted as used in the atlas */
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};
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GskGLGlyphCache * gsk_gl_glyph_cache_new (GdkDisplay *display,
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GskGLTextureAtlases *atlases);
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GskGLGlyphCache * gsk_gl_glyph_cache_ref (GskGLGlyphCache *self);
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void gsk_gl_glyph_cache_unref (GskGLGlyphCache *self);
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void gsk_gl_glyph_cache_begin_frame (GskGLGlyphCache *self,
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GskGLDriver *driver,
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GPtrArray *removed_atlases);
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void gsk_gl_glyph_cache_lookup_or_add (GskGLGlyphCache *self,
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GlyphCacheKey *lookup,
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GskGLDriver *driver,
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const GskGLCachedGlyph **cached_glyph_out);
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#endif
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