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104 lines
3.0 KiB
C
104 lines
3.0 KiB
C
/* gskglglyphlibraryprivate.h
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*
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* Copyright 2020 Christian Hergert <chergert@redhat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*/
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#pragma once
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#include <pango/pango.h>
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#include "gskgltexturelibraryprivate.h"
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G_BEGIN_DECLS
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#define GSK_TYPE_GL_GLYPH_LIBRARY (gsk_gl_glyph_library_get_type())
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typedef struct _GskGLGlyphKey
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{
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PangoFont *font;
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PangoGlyph glyph;
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guint xshift : 2;
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guint yshift : 2;
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guint scale : 28; /* times 1024 */
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} GskGLGlyphKey;
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typedef struct _GskGLGlyphValue
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{
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GskGLTextureAtlasEntry entry;
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PangoRectangle ink_rect;
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} GskGLGlyphValue;
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#if GLIB_SIZEOF_VOID_P == 8
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G_STATIC_ASSERT (sizeof (GskGLGlyphKey) == 16);
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#elif GLIB_SIZEOF_VOID_P == 4
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G_STATIC_ASSERT (sizeof (GskGLGlyphKey) == 12);
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#endif
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G_DECLARE_FINAL_TYPE (GskGLGlyphLibrary, gsk_gl_glyph_library, GSK, GL_GLYPH_LIBRARY, GskGLTextureLibrary)
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struct _GskGLGlyphLibrary
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{
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GskGLTextureLibrary parent_instance;
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guint8 *surface_data;
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gsize surface_data_len;
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struct {
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GskGLGlyphKey key;
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const GskGLGlyphValue *value;
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} front[256];
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};
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GskGLGlyphLibrary *gsk_gl_glyph_library_new (GskGLDriver *driver);
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gboolean gsk_gl_glyph_library_add (GskGLGlyphLibrary *self,
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GskGLGlyphKey *key,
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const GskGLGlyphValue **out_value);
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static inline guint
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gsk_gl_glyph_library_lookup_or_add (GskGLGlyphLibrary *self,
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const GskGLGlyphKey *key,
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const GskGLGlyphValue **out_value)
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{
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GskGLTextureAtlasEntry *entry;
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guint front_index = ((key->glyph << 2) | key->xshift) & 0xFF;
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if (memcmp (key, &self->front[front_index], sizeof *key) == 0)
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{
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*out_value = self->front[front_index].value;
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}
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else if (gsk_gl_texture_library_lookup ((GskGLTextureLibrary *)self, key, &entry))
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{
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*out_value = (GskGLGlyphValue *)entry;
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self->front[front_index].key = *key;
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self->front[front_index].value = *out_value;
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}
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else
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{
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GskGLGlyphKey *k;
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k = g_new (GskGLGlyphKey, 1);
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memcpy (k, key, sizeof (GskGLGlyphKey));
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g_object_ref (k->font);
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gsk_gl_glyph_library_add (self, k, out_value);
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self->front[front_index].key = *key;
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self->front[front_index].value = *out_value;
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}
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return GSK_GL_TEXTURE_ATLAS_ENTRY_TEXTURE (*out_value);
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}
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G_END_DECLS
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