forked from AuroraMiddleware/gtk
41c25b8809
This reverts commit 6599cb001f
.
324 lines
10 KiB
C
324 lines
10 KiB
C
/* gsknglglyphlibrary.c
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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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#include "config.h"
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#include <gdk/gdkglcontextprivate.h>
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#include <gdk/gdkmemorytextureprivate.h>
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#include <gdk/gdkprofilerprivate.h>
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#include "gsknglcommandqueueprivate.h"
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#include "gskngldriverprivate.h"
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#include "gsknglglyphlibraryprivate.h"
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#define MAX_GLYPH_SIZE 128
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G_DEFINE_TYPE (GskNglGlyphLibrary, gsk_ngl_glyph_library, GSK_TYPE_GL_TEXTURE_LIBRARY)
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GskNglGlyphLibrary *
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gsk_ngl_glyph_library_new (GskNglDriver *driver)
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{
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g_return_val_if_fail (GSK_IS_NGL_DRIVER (driver), NULL);
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return g_object_new (GSK_TYPE_GL_GLYPH_LIBRARY,
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"driver", driver,
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NULL);
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}
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static guint
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gsk_ngl_glyph_key_hash (gconstpointer data)
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{
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const GskNglGlyphKey *key = data;
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/* We do not store the hash within the key because GHashTable will already
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* store the hash value for us and so this is called only a single time per
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* cached item. This saves an extra 4 bytes per GskNglGlyphKey which means on
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* 64-bit, we fit nicely within 2 pointers (the smallest allocation size
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* for GSlice).
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*/
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return GPOINTER_TO_UINT (key->font) ^
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key->glyph ^
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(key->xshift << 24) ^
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(key->yshift << 26) ^
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key->scale;
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}
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static gboolean
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gsk_ngl_glyph_key_equal (gconstpointer v1,
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gconstpointer v2)
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{
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return memcmp (v1, v2, sizeof (GskNglGlyphKey)) == 0;
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}
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static void
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gsk_ngl_glyph_key_free (gpointer data)
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{
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GskNglGlyphKey *key = data;
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g_clear_object (&key->font);
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g_slice_free (GskNglGlyphKey, key);
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}
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static void
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gsk_ngl_glyph_value_free (gpointer data)
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{
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g_slice_free (GskNglGlyphValue, data);
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}
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static void
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gsk_ngl_glyph_library_begin_frame (GskNglTextureLibrary *library,
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gint64 frame_id,
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GPtrArray *removed_atlases)
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{
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GskNglGlyphLibrary *self = (GskNglGlyphLibrary *)library;
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memset (self->front, 0, sizeof self->front);
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}
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static void
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gsk_ngl_glyph_library_finalize (GObject *object)
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{
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GskNglGlyphLibrary *self = (GskNglGlyphLibrary *)object;
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g_clear_pointer (&self->surface_data, g_free);
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G_OBJECT_CLASS (gsk_ngl_glyph_library_parent_class)->finalize (object);
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}
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static void
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gsk_ngl_glyph_library_class_init (GskNglGlyphLibraryClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GskNglTextureLibraryClass *library_class = GSK_NGL_TEXTURE_LIBRARY_CLASS (klass);
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object_class->finalize = gsk_ngl_glyph_library_finalize;
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library_class->begin_frame = gsk_ngl_glyph_library_begin_frame;
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}
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static void
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gsk_ngl_glyph_library_init (GskNglGlyphLibrary *self)
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{
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GskNglTextureLibrary *tl = (GskNglTextureLibrary *)self;
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tl->max_entry_size = MAX_GLYPH_SIZE;
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gsk_ngl_texture_library_set_funcs (tl,
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gsk_ngl_glyph_key_hash,
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gsk_ngl_glyph_key_equal,
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gsk_ngl_glyph_key_free,
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gsk_ngl_glyph_value_free);
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}
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static cairo_surface_t *
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gsk_ngl_glyph_library_create_surface (GskNglGlyphLibrary *self,
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int stride,
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int width,
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int height,
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double device_scale)
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{
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cairo_surface_t *surface;
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gsize n_bytes;
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g_assert (GSK_IS_NGL_GLYPH_LIBRARY (self));
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g_assert (width > 0);
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g_assert (height > 0);
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n_bytes = stride * height;
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if G_LIKELY (n_bytes > self->surface_data_len)
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{
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self->surface_data = g_realloc (self->surface_data, n_bytes);
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self->surface_data_len = n_bytes;
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}
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memset (self->surface_data, 0, n_bytes);
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surface = cairo_image_surface_create_for_data (self->surface_data,
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CAIRO_FORMAT_ARGB32,
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width, height, stride);
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cairo_surface_set_device_scale (surface, device_scale, device_scale);
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return surface;
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}
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static void
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render_glyph (cairo_surface_t *surface,
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const cairo_scaled_font_t *scaled_font,
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const GskNglGlyphKey *key,
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const GskNglGlyphValue *value)
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{
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cairo_t *cr;
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cairo_glyph_t glyph;
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g_assert (surface != NULL);
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g_assert (scaled_font != NULL);
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cr = cairo_create (surface);
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cairo_set_scaled_font (cr, scaled_font);
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cairo_set_source_rgba (cr, 1, 1, 1, 1);
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glyph.index = key->glyph;
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glyph.x = 0.25 * key->xshift - value->ink_rect.x;
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glyph.y = 0.25 * key->yshift - value->ink_rect.y;
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cairo_show_glyphs (cr, &glyph, 1);
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cairo_destroy (cr);
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cairo_surface_flush (surface);
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}
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static void
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gsk_ngl_glyph_library_upload_glyph (GskNglGlyphLibrary *self,
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const GskNglGlyphKey *key,
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const GskNglGlyphValue *value,
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int x,
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int y,
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int width,
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int height,
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double device_scale)
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{
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GskNglTextureLibrary *tl = (GskNglTextureLibrary *)self;
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G_GNUC_UNUSED gint64 start_time = GDK_PROFILER_CURRENT_TIME;
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cairo_scaled_font_t *scaled_font;
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cairo_surface_t *surface;
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guchar *pixel_data;
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guchar *free_data = NULL;
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guint gl_format;
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guint gl_type;
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guint texture_id;
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gsize stride;
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g_assert (GSK_IS_NGL_GLYPH_LIBRARY (self));
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g_assert (key != NULL);
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g_assert (value != NULL);
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scaled_font = pango_cairo_font_get_scaled_font ((PangoCairoFont *)key->font);
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if G_UNLIKELY (scaled_font == NULL ||
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cairo_scaled_font_status (scaled_font) != CAIRO_STATUS_SUCCESS)
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return;
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stride = cairo_format_stride_for_width (CAIRO_FORMAT_ARGB32, width);
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gdk_gl_context_push_debug_group_printf (gdk_gl_context_get_current (),
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"Uploading glyph %d",
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key->glyph);
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surface = gsk_ngl_glyph_library_create_surface (self, stride, width, height, device_scale);
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render_glyph (surface, scaled_font, key, value);
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texture_id = GSK_NGL_TEXTURE_ATLAS_ENTRY_TEXTURE (value);
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g_assert (texture_id > 0);
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glPixelStorei (GL_UNPACK_ROW_LENGTH, stride / 4);
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glBindTexture (GL_TEXTURE_2D, texture_id);
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if G_UNLIKELY (gdk_gl_context_get_use_es (gdk_gl_context_get_current ()))
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{
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pixel_data = free_data = g_malloc (width * height * 4);
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gdk_memory_convert (pixel_data,
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width * 4,
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GDK_MEMORY_R8G8B8A8_PREMULTIPLIED,
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cairo_image_surface_get_data (surface),
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width * 4,
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GDK_MEMORY_DEFAULT,
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width, height);
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gl_format = GL_RGBA;
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gl_type = GL_UNSIGNED_BYTE;
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}
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else
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{
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pixel_data = cairo_image_surface_get_data (surface);
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gl_format = GL_BGRA;
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gl_type = GL_UNSIGNED_INT_8_8_8_8_REV;
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}
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glTexSubImage2D (GL_TEXTURE_2D, 0, x, y, width, height,
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gl_format, gl_type, pixel_data);
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glPixelStorei (GL_UNPACK_ROW_LENGTH, 0);
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cairo_surface_destroy (surface);
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g_free (free_data);
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gdk_gl_context_pop_debug_group (gdk_gl_context_get_current ());
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tl->driver->command_queue->n_uploads++;
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if (gdk_profiler_is_running ())
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{
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char message[64];
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g_snprintf (message, sizeof message, "Size %dx%d", width, height);
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gdk_profiler_add_mark (start_time, GDK_PROFILER_CURRENT_TIME-start_time, "Upload Glyph", message);
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}
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}
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gboolean
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gsk_ngl_glyph_library_add (GskNglGlyphLibrary *self,
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GskNglGlyphKey *key,
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const GskNglGlyphValue **out_value)
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{
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GskNglTextureLibrary *tl = (GskNglTextureLibrary *)self;
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PangoRectangle ink_rect;
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GskNglGlyphValue *value;
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int width;
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int height;
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guint packed_x;
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guint packed_y;
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g_assert (GSK_IS_NGL_GLYPH_LIBRARY (self));
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g_assert (key != NULL);
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g_assert (out_value != NULL);
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pango_font_get_glyph_extents (key->font, key->glyph, &ink_rect, NULL);
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pango_extents_to_pixels (&ink_rect, NULL);
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if (key->xshift != 0)
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ink_rect.width++;
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if (key->yshift != 0)
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ink_rect.height++;
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width = (int) ceil (ink_rect.width * key->scale / 1024.0);
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height = (int) ceil (ink_rect.height * key->scale / 1024.0);
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value = gsk_ngl_texture_library_pack (tl,
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key,
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sizeof *value,
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width,
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height,
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1,
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&packed_x, &packed_y);
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memcpy (&value->ink_rect, &ink_rect, sizeof ink_rect);
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if (key->scale > 0 && width > 0 && height > 0)
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gsk_ngl_glyph_library_upload_glyph (self,
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key,
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value,
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packed_x + 1,
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packed_y + 1,
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width,
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height,
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key->scale / 1024.0);
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*out_value = value;
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return GSK_NGL_TEXTURE_ATLAS_ENTRY_TEXTURE (value) != 0;
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}
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