09caa0632f
Use a hb font at nominal size when generating sdf contours, and use a cache key that is independent of the size.
143 lines
4.1 KiB
C
143 lines
4.1 KiB
C
/* gskglglyphylibraryprivate.h
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*
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* Copyright 2020-2022 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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#ifndef __GSK_GL_GLYPHY_LIBRARY_PRIVATE_H__
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#define __GSK_GL_GLYPHY_LIBRARY_PRIVATE_H__
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#include <glyphy.h>
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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_GLYPHY_LIBRARY (gsk_gl_glyphy_library_get_type())
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typedef guint FontKey;
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extern GQuark quark_glyphy_font_key;
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static inline FontKey
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gsk_gl_glyphy_library_get_font_key (PangoFont *font)
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{
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FontKey key;
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key = (FontKey) GPOINTER_TO_UINT (g_object_get_qdata ((GObject *)font, quark_glyphy_font_key));
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if (key == 0)
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{
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PangoFontDescription *desc = pango_font_describe (font);
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pango_font_description_set_size (desc, 10 * PANGO_SCALE);
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key = (FontKey) pango_font_description_hash (desc);
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pango_font_description_free (desc);
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g_object_set_qdata ((GObject *)font, quark_glyphy_font_key, GUINT_TO_POINTER (key));
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}
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return key;
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}
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static inline float
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gsk_gl_glyphy_library_get_font_scale (PangoFont *font)
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{
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hb_font_t *hbfont;
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int x_scale, y_scale;
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hbfont = pango_font_get_hb_font (font);
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hb_font_get_scale (hbfont, &x_scale, &y_scale);
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return MAX (x_scale, y_scale) / 1000.0;
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}
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typedef struct _GskGLGlyphyKey
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{
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FontKey font;
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PangoGlyph glyph;
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} GskGLGlyphyKey;
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typedef struct _GskGLGlyphyValue
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{
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GskGLTextureAtlasEntry entry;
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struct {
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float min_x;
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float min_y;
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float max_x;
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float max_y;
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} extents;
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guint nominal_w;
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guint nominal_h;
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guint atlas_x;
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guint atlas_y;
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} GskGLGlyphyValue;
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G_DECLARE_FINAL_TYPE (GskGLGlyphyLibrary, gsk_gl_glyphy_library, GSK, GL_GLYPHY_LIBRARY, GskGLTextureLibrary)
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struct _GskGLGlyphyLibrary
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{
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GskGLTextureLibrary parent_instance;
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glyphy_arc_accumulator_t *acc;
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GArray *acc_endpoints;
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guint item_w;
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guint item_h_q;
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struct {
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GskGLGlyphyKey key;
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const GskGLGlyphyValue *value;
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} front[256];
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};
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GskGLGlyphyLibrary *gsk_gl_glyphy_library_new (GskGLDriver *driver);
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gboolean gsk_gl_glyphy_library_add (GskGLGlyphyLibrary *self,
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GskGLGlyphyKey *key,
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PangoFont *font,
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const GskGLGlyphyValue **out_value);
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static inline guint
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gsk_gl_glyphy_library_lookup_or_add (GskGLGlyphyLibrary *self,
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const GskGLGlyphyKey *key,
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PangoFont *font,
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const GskGLGlyphyValue **out_value)
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{
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GskGLTextureAtlasEntry *entry;
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guint front_index = key->glyph & 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 = (GskGLGlyphyValue *)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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GskGLGlyphyKey *k = g_slice_copy (sizeof *key, key);
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gsk_gl_glyphy_library_add (self, k, font, 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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#endif /* __GSK_GL_GLYPHY_LIBRARY_PRIVATE_H__ */
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