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/* gsknglglyphlibraryprivate.h
*
* Copyright 2020 Christian Hergert <chergert@redhat.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#ifndef __GSK_NGL_GLYPH_LIBRARY_PRIVATE_H__
#define __GSK_NGL_GLYPH_LIBRARY_PRIVATE_H__
#include <pango/pango.h>
#include "gskngltexturelibraryprivate.h"
G_BEGIN_DECLS
#define GSK_TYPE_GL_GLYPH_LIBRARY (gsk_ngl_glyph_library_get_type())
typedef struct _GskNglGlyphKey
{
PangoFont *font;
PangoGlyph glyph;
guint xshift : 2;
guint yshift : 2;
guint scale : 28; /* times 1024 */
} GskNglGlyphKey;
typedef struct _GskNglGlyphValue
{
GskNglTextureAtlasEntry entry;
PangoRectangle ink_rect;
} GskNglGlyphValue;
#if GLIB_SIZEOF_VOID_P == 8
G_STATIC_ASSERT (sizeof (GskNglGlyphKey) == 16);
#elif GLIB_SIZEOF_VOID_P == 4
G_STATIC_ASSERT (sizeof (GskNglGlyphKey) == 12);
#endif
G_DECLARE_FINAL_TYPE (GskNglGlyphLibrary, gsk_ngl_glyph_library, GSK, NGL_GLYPH_LIBRARY, GskNglTextureLibrary)
struct _GskNglGlyphLibrary
{
GskNglTextureLibrary parent_instance;
guint8 *surface_data;
gsize surface_data_len;
struct {
GskNglGlyphKey key;
const GskNglGlyphValue *value;
} front[256];
};
GskNglGlyphLibrary *gsk_ngl_glyph_library_new (GskNglDriver *driver);
gboolean gsk_ngl_glyph_library_add (GskNglGlyphLibrary *self,
GskNglGlyphKey *key,
const GskNglGlyphValue **out_value);
static inline guint
gsk_ngl_glyph_library_lookup_or_add (GskNglGlyphLibrary *self,
const GskNglGlyphKey *key,
const GskNglGlyphValue **out_value)
{
GskNglTextureAtlasEntry *entry;
guint front_index = ((key->glyph << 2) | key->xshift) & 0xFF;
if (memcmp (key, &self->front[front_index], sizeof *key) == 0)
{
*out_value = self->front[front_index].value;
}
else if (gsk_ngl_texture_library_lookup ((GskNglTextureLibrary *)self, key, &entry))
{
*out_value = (GskNglGlyphValue *)entry;
self->front[front_index].key = *key;
self->front[front_index].value = *out_value;
}
else
{
GskNglGlyphKey *k = g_slice_copy (sizeof *key, key);
g_object_ref (k->font);
gsk_ngl_glyph_library_add (self, k, out_value);
self->front[front_index].key = *key;
self->front[front_index].value = *out_value;
}
return GSK_NGL_TEXTURE_ATLAS_ENTRY_TEXTURE (*out_value);
}
G_END_DECLS
#endif /* __GSK_NGL_GLYPH_LIBRARY_PRIVATE_H__ */
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