[gtk+/wip/baedert/gl: 22/39] gl: Add glyph cache
- From: Timm Bäder <baedert src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gtk+/wip/baedert/gl: 22/39] gl: Add glyph cache
- Date: Fri, 24 Nov 2017 11:49:55 +0000 (UTC)
commit 30d2eeb917565b22da08ca0614bdfe92b36051d6
Author: Timm Bäder <mail baedert org>
Date: Sat Nov 18 14:30:57 2017 +0100
gl: Add glyph cache
Based on the one used by the vulkan renderer
gsk/gskgldriver.c | 21 ++-
gsk/gskgldriverprivate.h | 3 +
gsk/gskglglyphcache.c | 445 +++++++++++++++++++++++++++++++++++
gsk/gskglglyphcacheprivate.h | 59 +++++
gsk/gskglimage.c | 68 ++++++
gsk/gskglimageprivate.h | 40 +++
gsk/gskglrenderer.c | 161 ++++++++++++-
gsk/meson.build | 3 +
gsk/resources/glsl/coloring.fs.glsl | 12 +
9 files changed, 806 insertions(+), 6 deletions(-)
---
diff --git a/gsk/gskgldriver.c b/gsk/gskgldriver.c
index 188ad23..f74e396 100644
--- a/gsk/gskgldriver.c
+++ b/gsk/gskgldriver.c
@@ -17,7 +17,8 @@ typedef struct {
GLuint mag_filter;
GArray *fbos;
GdkTexture *user;
- gboolean in_use : 1;
+ guint in_use : 1;
+ guint permanent : 1;
} Texture;
typedef struct {
@@ -298,6 +299,7 @@ gsk_gl_driver_collect_textures (GskGLDriver *driver)
GHashTableIter iter;
gpointer value_p = NULL;
int old_size;
+ /*return;*/
g_return_val_if_fail (GSK_IS_GL_DRIVER (driver), 0);
g_return_val_if_fail (!driver->in_frame, 0);
@@ -309,7 +311,7 @@ gsk_gl_driver_collect_textures (GskGLDriver *driver)
{
Texture *t = value_p;
- if (t->user)
+ if (t->user || t->permanent)
continue;
if (t->in_use)
@@ -512,6 +514,21 @@ gsk_gl_driver_get_texture_for_texture (GskGLDriver *driver,
}
int
+gsk_gl_driver_create_permanent_texture (GskGLDriver *self,
+ float width,
+ float height)
+{
+ Texture *t;
+
+ g_return_val_if_fail (GSK_IS_GL_DRIVER (self), -1);
+
+ t = create_texture (self, width, height);
+ t->permanent = TRUE;
+
+ return t->texture_id;
+}
+
+int
gsk_gl_driver_create_texture (GskGLDriver *driver,
float width,
float height)
diff --git a/gsk/gskgldriverprivate.h b/gsk/gskgldriverprivate.h
index 5a138b1..c26ebff 100644
--- a/gsk/gskgldriverprivate.h
+++ b/gsk/gskgldriverprivate.h
@@ -27,6 +27,9 @@ int gsk_gl_driver_get_texture_for_texture (GskGLDriver *driver
GdkTexture *texture,
int min_filter,
int mag_filter);
+int gsk_gl_driver_create_permanent_texture (GskGLDriver *driver,
+ float width,
+ float height);
int gsk_gl_driver_create_texture (GskGLDriver *driver,
float width,
float height);
diff --git a/gsk/gskglglyphcache.c b/gsk/gskglglyphcache.c
new file mode 100644
index 0000000..9e253e2
--- /dev/null
+++ b/gsk/gskglglyphcache.c
@@ -0,0 +1,445 @@
+#include "config.h"
+
+#include "gskglglyphcacheprivate.h"
+#include "gskgldriverprivate.h"
+#include "gskdebugprivate.h"
+#include "gskprivate.h"
+
+#include <graphene.h>
+#include <cairo/cairo.h>
+#include <epoxy/gl.h>
+
+/* Parameters for our cache eviction strategy.
+ *
+ * Each cached glyph has an age that gets reset every time a cached glyph gets used.
+ * Glyphs that have not been used for the MAX_AGE frames are considered old. We keep
+ * count of the pixels of each atlas that are taken up by old glyphs. We check the
+ * fraction of old pixels every CHECK_INTERVAL frames, and if it is above MAX_OLD, then
+ * we drop the atlas an all the glyphs contained in it from the cache.
+ */
+
+#define MAX_AGE 60
+#define CHECK_INTERVAL 10
+#define MAX_OLD 0.333
+
+#define ATLAS_SIZE 512
+
+typedef struct
+{
+ PangoFont *font;
+ PangoGlyph glyph;
+ guint scale; /* times 1024 */
+} GlyphCacheKey;
+
+typedef struct
+{
+ GlyphCacheKey *key;
+ GskGLCachedGlyph *value;
+ cairo_surface_t *surface;
+} DirtyGlyph;
+
+
+static guint glyph_cache_hash (gconstpointer v);
+static gboolean glyph_cache_equal (gconstpointer v1,
+ gconstpointer v2);
+static void glyph_cache_key_free (gpointer v);
+static void glyph_cache_value_free (gpointer v);
+static void dirty_glyph_free (gpointer v);
+
+static GskGLGlyphAtlas *
+create_atlas (GskGLGlyphCache *cache)
+{
+ GskGLGlyphAtlas *atlas;
+
+ atlas = g_new0 (GskGLGlyphAtlas, 1);
+ atlas->width = ATLAS_SIZE;
+ atlas->height = ATLAS_SIZE;
+ atlas->y0 = 1;
+ atlas->y = 1;
+ atlas->x = 1;
+ atlas->image = NULL;
+ atlas->num_glyphs = 0;
+ atlas->dirty_glyphs = NULL;
+
+ return atlas;
+}
+
+static void
+free_atlas (gpointer v)
+{
+ GskGLGlyphAtlas *atlas = v;
+
+ if (atlas->image)
+ {
+ g_assert (atlas->image->texture_id == 0);
+ g_free (atlas->image);
+ }
+ g_list_free_full (atlas->dirty_glyphs, dirty_glyph_free);
+ g_free (atlas);
+}
+
+void
+gsk_gl_glyph_cache_init (GskGLGlyphCache *self,
+ GskGLDriver *gl_driver)
+{
+ self->hash_table = g_hash_table_new_full (glyph_cache_hash, glyph_cache_equal,
+ glyph_cache_key_free, glyph_cache_value_free);
+ self->atlases = g_ptr_array_new_with_free_func (free_atlas);
+ g_ptr_array_add (self->atlases, create_atlas (self));
+
+ self->gl_driver = gl_driver;
+}
+
+void
+gsk_gl_glyph_cache_free (GskGLGlyphCache *self)
+{
+ guint i;
+
+ for (i = 0; i < self->atlases->len; i ++)
+ {
+ GskGLGlyphAtlas *atlas = g_ptr_array_index (self->atlases, i);
+
+ if (atlas->image)
+ {
+ gsk_gl_image_destroy (atlas->image, self->gl_driver);
+ atlas->image->texture_id = 0;
+ }
+ }
+
+ g_ptr_array_unref (self->atlases);
+ g_hash_table_unref (self->hash_table);
+}
+
+static gboolean
+glyph_cache_equal (gconstpointer v1, gconstpointer v2)
+{
+ const GlyphCacheKey *key1 = v1;
+ const GlyphCacheKey *key2 = v2;
+
+ return key1->font == key2->font &&
+ key1->glyph == key2->glyph &&
+ key1->scale == key2->scale;
+}
+
+static guint
+glyph_cache_hash (gconstpointer v)
+{
+ const GlyphCacheKey *key = v;
+
+ return GPOINTER_TO_UINT (key->font) ^ key->glyph ^ key->scale;
+}
+
+static void
+glyph_cache_key_free (gpointer v)
+{
+ GlyphCacheKey *f = v;
+
+ g_object_unref (f->font);
+ g_free (f);
+}
+
+static void
+glyph_cache_value_free (gpointer v)
+{
+ g_free (v);
+}
+
+static void
+dirty_glyph_free (gpointer v)
+{
+ DirtyGlyph *glyph = v;
+
+ if (glyph->surface)
+ cairo_surface_destroy (glyph->surface);
+ g_free (glyph);
+}
+
+static void
+add_to_cache (GskGLGlyphCache *cache,
+ GlyphCacheKey *key,
+ GskGLCachedGlyph *value)
+{
+ GskGLGlyphAtlas *atlas;
+ int i;
+ DirtyGlyph *dirty;
+ int width = value->draw_width * key->scale / 1024;
+ int height = value->draw_height * key->scale / 1024;
+
+ for (i = 0; i < cache->atlases->len; i++)
+ {
+ int x, y, y0;
+
+ atlas = g_ptr_array_index (cache->atlases, i);
+ x = atlas->x;
+ y = atlas->y;
+ y0 = atlas->y0;
+
+ if (atlas->x + width + 1 >= atlas->width)
+ {
+ /* start a new row */
+ y0 = y + 1;
+ x = 1;
+ }
+
+ if (y0 + height + 1 >= atlas->height)
+ continue;
+
+ atlas->y0 = y0;
+ atlas->x = x;
+ atlas->y = y;
+ break;
+ }
+
+ if (i == cache->atlases->len)
+ {
+ atlas = create_atlas (cache);
+ g_ptr_array_add (cache->atlases, atlas);
+ }
+
+ value->tx = (float)atlas->x / atlas->width;
+ value->ty = (float)atlas->y0 / atlas->height;
+ value->tw = (float)width / atlas->width;
+ value->th = (float)height / atlas->height;
+
+ value->atlas = atlas;
+
+ dirty = g_new0 (DirtyGlyph, 1);
+ dirty->key = key;
+ dirty->value = value;
+ atlas->dirty_glyphs = g_list_prepend (atlas->dirty_glyphs, dirty);
+
+ atlas->x = atlas->x + width + 1;
+ atlas->y = MAX (atlas->y, atlas->y0 + height + 1);
+
+ atlas->num_glyphs++;
+
+#ifdef G_ENABLE_DEBUG
+ if (GSK_DEBUG_CHECK(GLYPH_CACHE))
+ {
+ g_print ("Glyph cache:\n");
+ for (i = 0; i < cache->atlases->len; i++)
+ {
+ atlas = g_ptr_array_index (cache->atlases, i);
+ g_print ("\tGskGLGlyphAtlas %d (%dx%d): %d glyphs (%d dirty), %.2g%% old pixels, filled to %d, %d
/ %d\n",
+ i, atlas->width, atlas->height,
+ atlas->num_glyphs, g_list_length (atlas->dirty_glyphs),
+ 100.0 * (double)atlas->old_pixels / (double)(atlas->width * atlas->height),
+ atlas->x, atlas->y0, atlas->y);
+ }
+ }
+#endif
+}
+
+static void
+render_glyph (const GskGLGlyphAtlas *atlas,
+ DirtyGlyph *glyph,
+ GskImageRegion *region)
+{
+ GlyphCacheKey *key = glyph->key;
+ GskGLCachedGlyph *value = glyph->value;
+ cairo_surface_t *surface;
+ cairo_t *cr;
+ cairo_scaled_font_t *scaled_font;
+ cairo_glyph_t cg;
+
+ scaled_font = pango_cairo_font_get_scaled_font ((PangoCairoFont *)key->font);
+ if (G_UNLIKELY (!scaled_font || cairo_scaled_font_status (scaled_font) != CAIRO_STATUS_SUCCESS))
+ return;
+
+ surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
+ value->draw_width * key->scale / 1024,
+ value->draw_height * key->scale / 1024);
+ cairo_surface_set_device_scale (surface, key->scale / 1024.0, key->scale / 1024.0);
+
+ cr = cairo_create (surface);
+
+ cairo_set_scaled_font (cr, scaled_font);
+ cairo_set_source_rgba (cr, 1, 1, 1, 1);
+
+ cg.index = key->glyph;
+ cg.x = - value->draw_x;
+ cg.y = - value->draw_y;
+
+ cairo_show_glyphs (cr, &cg, 1);
+
+ cairo_destroy (cr);
+
+ glyph->surface = surface;
+
+ region->data = cairo_image_surface_get_data (surface);
+ region->width = cairo_image_surface_get_width (surface);
+ region->height = cairo_image_surface_get_height (surface);
+ region->stride = cairo_image_surface_get_stride (surface);
+ region->x = (gsize)(value->tx * atlas->width);
+ region->y = (gsize)(value->ty * atlas->height);
+}
+
+static void
+upload_dirty_glyphs (GskGLGlyphCache *self,
+ GskGLGlyphAtlas *atlas)
+{
+ GList *l;
+ guint num_regions;
+ GskImageRegion *regions;
+ int i;
+
+ num_regions = g_list_length (atlas->dirty_glyphs);
+ regions = alloca (sizeof (GskImageRegion) * num_regions);
+
+ for (l = atlas->dirty_glyphs, i = 0; l; l = l->next, i++)
+ render_glyph (atlas, (DirtyGlyph *)l->data, ®ions[i]);
+
+ GSK_NOTE (GLYPH_CACHE,
+ g_print ("uploading %d glyphs to cache\n", num_regions));
+
+
+ gsk_gl_image_upload_regions (atlas->image, self->gl_driver, num_regions, regions);
+
+ g_list_free_full (atlas->dirty_glyphs, dirty_glyph_free);
+ atlas->dirty_glyphs = NULL;
+}
+
+const GskGLCachedGlyph *
+gsk_gl_glyph_cache_lookup (GskGLGlyphCache *cache,
+ gboolean create,
+ PangoFont *font,
+ PangoGlyph glyph,
+ float scale)
+{
+ GlyphCacheKey lookup_key;
+ GskGLCachedGlyph *value;
+
+ lookup_key.font = font;
+ lookup_key.glyph = glyph;
+ lookup_key.scale = (guint)(scale * 1024);
+
+ value = g_hash_table_lookup (cache->hash_table, &lookup_key);
+
+ if (value)
+ {
+ if (cache->timestamp - value->timestamp >= MAX_AGE)
+ {
+ GskGLGlyphAtlas *atlas = value->atlas;
+
+ if (atlas)
+ atlas->old_pixels -= value->draw_width * value->draw_height;
+
+ value->timestamp = cache->timestamp;
+ }
+ }
+
+ if (create && value == NULL)
+ {
+ GlyphCacheKey *key;
+ PangoRectangle ink_rect;
+
+ key = g_new0 (GlyphCacheKey, 1);
+ value = g_new0 (GskGLCachedGlyph, 1);
+
+ pango_font_get_glyph_extents (font, glyph, &ink_rect, NULL);
+ pango_extents_to_pixels (&ink_rect, NULL);
+
+ value->draw_x = ink_rect.x;
+ value->draw_y = ink_rect.y;
+ value->draw_width = ink_rect.width;
+ value->draw_height = ink_rect.height;
+ value->timestamp = cache->timestamp;
+ value->atlas = NULL; /* For now */
+
+ key->font = g_object_ref (font);
+ key->glyph = glyph;
+ key->scale = (guint)(scale * 1024);
+
+ if (ink_rect.width > 0 && ink_rect.height > 0)
+ add_to_cache (cache, key, value);
+
+ g_hash_table_insert (cache->hash_table, key, value);
+ }
+
+ return value;
+}
+
+GskGLImage *
+gsk_gl_glyph_cache_get_glyph_image (GskGLGlyphCache *self,
+ const GskGLCachedGlyph *glyph)
+{
+ GskGLGlyphAtlas *atlas = glyph->atlas;
+
+ g_assert (atlas != NULL);
+
+
+ if (atlas->image == NULL)
+ {
+ atlas->image = g_new0 (GskGLImage, 1);
+ gsk_gl_image_create (atlas->image, self->gl_driver, atlas->width, atlas->height);
+ }
+
+ if (atlas->dirty_glyphs)
+ upload_dirty_glyphs (self, atlas);
+
+ return atlas->image;
+}
+
+void
+gsk_gl_glyph_cache_begin_frame (GskGLGlyphCache *self)
+{
+ int i;
+ GHashTableIter iter;
+ GlyphCacheKey *key;
+ GskGLCachedGlyph *value;
+ guint dropped = 0;
+
+ self->timestamp++;
+
+
+ if (self->timestamp % CHECK_INTERVAL != 0)
+ return;
+
+ /* look for glyphs that have grown old since last time */
+ g_hash_table_iter_init (&iter, self->hash_table);
+ while (g_hash_table_iter_next (&iter, (gpointer *)&key, (gpointer *)&value))
+ {
+ guint age;
+
+ age = self->timestamp - value->timestamp;
+ if (MAX_AGE <= age && age < MAX_AGE + CHECK_INTERVAL)
+ {
+ GskGLGlyphAtlas *atlas = value->atlas;
+
+ if (atlas)
+ atlas->old_pixels += value->draw_width * value->draw_height;
+ }
+ }
+
+ /* look for atlases to drop, and create a mapping of updated texture indices */
+ for (i = self->atlases->len - 1; i >= 0; i--)
+ {
+ GskGLGlyphAtlas *atlas = g_ptr_array_index (self->atlases, i);
+
+ if (atlas->old_pixels > MAX_OLD * atlas->width * atlas->height)
+ {
+ GSK_NOTE(GLYPH_CACHE,
+ g_print ("Dropping atlas %d (%g.2%% old)\n",
+ i, 100.0 * (double)atlas->old_pixels / (double)(atlas->width * atlas->height)));
+
+ if (atlas->image)
+ {
+ gsk_gl_image_destroy (atlas->image, self->gl_driver);
+ atlas->image->texture_id = 0;
+ }
+
+ /* Remove all glyphs that point to this atlas */
+ g_hash_table_iter_init (&iter, self->hash_table);
+ while (g_hash_table_iter_next (&iter, (gpointer *)&key, (gpointer *)&value))
+ {
+ if (value->atlas == atlas)
+ g_hash_table_iter_remove (&iter);
+ }
+ /* TODO: The above loop inside this other loop could be slow... */
+
+ g_ptr_array_remove_index (self->atlases, i);
+ }
+ }
+
+ GSK_NOTE(GLYPH_CACHE, g_print ("Dropped %d glyphs\n", dropped));
+}
diff --git a/gsk/gskglglyphcacheprivate.h b/gsk/gskglglyphcacheprivate.h
new file mode 100644
index 0000000..7166402
--- /dev/null
+++ b/gsk/gskglglyphcacheprivate.h
@@ -0,0 +1,59 @@
+#ifndef __GSK_GL_GLYPH_CACHE_PRIVATE_H__
+#define __GSK_GL_GLYPH_CACHE_PRIVATE_H__
+
+#include "gskgldriverprivate.h"
+#include "gskglimageprivate.h"
+#include <pango/pango.h>
+#include <gdk/gdk.h>
+
+typedef struct
+{
+ GskGLDriver *gl_driver;
+
+ GHashTable *hash_table;
+ GPtrArray *atlases;
+
+ guint64 timestamp;
+} GskGLGlyphCache;
+
+
+typedef struct
+{
+ GskGLImage *image;
+ int width, height;
+ int x, y, y0;
+ int num_glyphs;
+ GList *dirty_glyphs;
+ guint old_pixels;
+} GskGLGlyphAtlas;
+
+typedef struct
+{
+ GskGLGlyphAtlas *atlas;
+
+ float tx;
+ float ty;
+ float tw;
+ float th;
+
+ int draw_x;
+ int draw_y;
+ int draw_width;
+ int draw_height;
+
+ guint64 timestamp;
+} GskGLCachedGlyph;
+
+void gsk_gl_glyph_cache_init (GskGLGlyphCache *self,
+ GskGLDriver *gl_driver);
+void gsk_gl_glyph_cache_free (GskGLGlyphCache *self);
+void gsk_gl_glyph_cache_begin_frame (GskGLGlyphCache *self);
+GskGLImage * gsk_gl_glyph_cache_get_glyph_image (GskGLGlyphCache *self,
+ const GskGLCachedGlyph *glyph);
+const GskGLCachedGlyph * gsk_gl_glyph_cache_lookup (GskGLGlyphCache *self,
+ gboolean create,
+ PangoFont *font,
+ PangoGlyph glyph,
+ float scale);
+
+#endif
diff --git a/gsk/gskglimage.c b/gsk/gskglimage.c
new file mode 100644
index 0000000..6d91b35
--- /dev/null
+++ b/gsk/gskglimage.c
@@ -0,0 +1,68 @@
+
+#include "gskglimageprivate.h"
+#include <epoxy/gl.h>
+
+void
+gsk_gl_image_create (GskGLImage *self,
+ GskGLDriver *gl_driver,
+ int width,
+ int height)
+{
+ self->texture_id = gsk_gl_driver_create_permanent_texture (gl_driver, width, height);
+ self->width = width;
+ self->height = height;
+
+ gsk_gl_driver_bind_source_texture (gl_driver, self->texture_id);
+ gsk_gl_driver_init_texture_empty (gl_driver, self->texture_id);
+}
+
+void
+gsk_gl_image_destroy (GskGLImage *self,
+ GskGLDriver *gl_driver)
+{
+ gsk_gl_driver_destroy_texture (gl_driver, self->texture_id);
+}
+
+void
+gsk_gl_image_write_to_png (const GskGLImage *self,
+ GskGLDriver *gl_driver,
+ const char *filename)
+{
+ int stride = cairo_format_stride_for_width (CAIRO_FORMAT_ARGB32, self->width);
+ guchar *data = g_malloc (self->height * stride);
+ cairo_surface_t *s;
+
+ gsk_gl_driver_bind_source_texture (gl_driver, self->texture_id);
+ glGetTexImage (GL_TEXTURE_2D, 0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, data);
+ s = cairo_image_surface_create_for_data (data, CAIRO_FORMAT_ARGB32, self->width, self->height, stride);
+ cairo_surface_write_to_png (s, filename);
+
+ cairo_surface_destroy (s);
+ g_free (data);
+}
+
+void
+gsk_gl_image_upload_regions (GskGLImage *self,
+ GskGLDriver *gl_driver,
+ guint n_regions,
+ const GskImageRegion *regions)
+{
+ guint i;
+
+ for (i = 0; i < n_regions; i ++)
+ {
+ const GskImageRegion *region = ®ions[i];
+
+ gsk_gl_driver_bind_source_texture (gl_driver, self->texture_id);
+ glBindTexture (GL_TEXTURE_2D, self->texture_id);
+
+ glTexSubImage2D (GL_TEXTURE_2D, 0, region->x, region->y, region->width, region->height,
+ GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, region->data);
+ }
+
+#ifdef G_ENABLE_DEBUG
+ /*gsk_gl_driver_bind_source_texture (gl_driver, self->texture_id);*/
+ /*gsk_gl_image_dump (self, gl_driver, "/home/baedert/atlases/test_dump.png");*/
+#endif
+}
+
diff --git a/gsk/gskglimageprivate.h b/gsk/gskglimageprivate.h
new file mode 100644
index 0000000..5a58fea
--- /dev/null
+++ b/gsk/gskglimageprivate.h
@@ -0,0 +1,40 @@
+#ifndef __GSK_GL_IMAGE_H__
+#define __GSK_GL_IMAGE_H__
+
+#include "gskgldriverprivate.h"
+#include <cairo/cairo.h>
+
+typedef struct
+{
+ guint texture_id;
+ int width;
+ int height;
+} GskGLImage;
+
+typedef struct
+{
+ guchar *data;
+ gsize width;
+ gsize height;
+ gsize stride;
+ gsize x;
+ gsize y;
+} GskImageRegion;
+
+void gsk_gl_image_create (GskGLImage *self,
+ GskGLDriver *gl_driver,
+ int width,
+ int height);
+void gsk_gl_image_destroy (GskGLImage *self,
+ GskGLDriver *gl_driver);
+void gsk_gl_image_write_to_png (const GskGLImage *self,
+ GskGLDriver *gl_driver,
+ const char *filename);
+void gsk_gl_image_upload_regions (GskGLImage *self,
+ GskGLDriver *gl_driver,
+ guint n_regions,
+ const GskImageRegion *regions);
+
+
+#endif
+
diff --git a/gsk/gskglrenderer.c b/gsk/gskglrenderer.c
index 2c50b74..5ee3537 100644
--- a/gsk/gskglrenderer.c
+++ b/gsk/gskglrenderer.c
@@ -10,11 +10,13 @@
#include "gskrendererprivate.h"
#include "gskrendernodeprivate.h"
#include "gskshaderbuilderprivate.h"
+#include "gskglglyphcacheprivate.h"
#include "gdk/gdktextureprivate.h"
#include "gskprivate.h"
#include <epoxy/gl.h>
+#include <cairo-ft.h>
#define SHADER_VERSION_GLES 100
#define SHADER_VERSION_GL2_LEGACY 110
@@ -41,6 +43,22 @@ dump_framebuffer (const char *filename, int w, int h)
g_free (data);
}
+static gboolean
+font_has_color_glyphs (const PangoFont *font)
+{
+ cairo_scaled_font_t *scaled_font;
+ gboolean has_color = FALSE;
+
+ scaled_font = pango_cairo_font_get_scaled_font ((PangoCairoFont *)font);
+ if (cairo_scaled_font_get_type (scaled_font) == CAIRO_FONT_TYPE_FT)
+ {
+ FT_Face ft_face = cairo_ft_scaled_font_lock_face (scaled_font);
+ has_color = (FT_HAS_COLOR (ft_face) != 0);
+ cairo_ft_scaled_font_unlock_face (scaled_font);
+ }
+
+ return has_color;
+}
static void
gsk_gl_renderer_setup_render_mode (GskGLRenderer *self);
@@ -95,6 +113,7 @@ typedef struct {
enum {
MODE_BLIT = 1,
MODE_COLOR,
+ MODE_COLORING,
MODE_TEXTURE,
MODE_COLOR_MATRIX,
MODE_LINEAR_GRADIENT,
@@ -219,12 +238,15 @@ struct _GskGLRenderer
Program blend_program;
Program blit_program;
Program color_program;
+ Program coloring_program;
Program color_matrix_program;
Program linear_gradient_program;
Program clip_program;
GArray *render_items;
+ GskGLGlyphCache glyph_cache;
+
#ifdef G_ENABLE_DEBUG
ProfileCounters profile_counters;
ProfileTimers profile_timers;
@@ -429,6 +451,20 @@ gsk_gl_renderer_create_programs (GskGLRenderer *self,
init_common_locations (self, builder, &self->color_program);
INIT_PROGRAM_UNIFORM_LOCATION (color_program, color_location, "uColor");
+ self->coloring_program.id = gsk_shader_builder_create_program (builder,
+ "blit.vs.glsl",
+ "coloring.fs.glsl",
+ &shader_error);
+ if (shader_error != NULL)
+ {
+ g_propagate_prefixed_error (error,
+ shader_error,
+ "Unable to create 'coloring' program: ");
+ goto out;
+ }
+ init_common_locations (self, builder, &self->coloring_program);
+ INIT_PROGRAM_UNIFORM_LOCATION (coloring_program, color_location, "uColor");
+
self->color_matrix_program.id = gsk_shader_builder_create_program (builder,
"color_matrix.vs.glsl",
"color_matrix.fs.glsl",
@@ -502,6 +538,8 @@ gsk_gl_renderer_realize (GskRenderer *renderer,
if (!gsk_gl_renderer_create_programs (self, error))
return FALSE;
+ gsk_gl_glyph_cache_init (&self->glyph_cache, self->gl_driver);
+
return TRUE;
}
@@ -524,11 +562,14 @@ gsk_gl_renderer_unrealize (GskRenderer *renderer)
glDeleteProgram (self->blend_program.id);
glDeleteProgram (self->blit_program.id);
glDeleteProgram (self->color_program.id);
+ glDeleteProgram (self->coloring_program.id);
glDeleteProgram (self->color_matrix_program.id);
glDeleteProgram (self->linear_gradient_program.id);
gsk_gl_renderer_destroy_buffers (self);
+ gsk_gl_glyph_cache_free (&self->glyph_cache);
+
g_clear_object (&self->gl_profiler);
g_clear_object (&self->gl_driver);
@@ -666,6 +707,20 @@ render_item (GskGLRenderer *self,
}
break;
+ case MODE_COLORING:
+ {
+ glUniform4f (item->program->color_location,
+ item->color_data.color.red,
+ item->color_data.color.green,
+ item->color_data.color.blue,
+ item->color_data.color.alpha);
+ g_assert(item->texture_id != 0);
+ /* Use texture unit 0 for the source */
+ glUniform1i (item->program->source_location, 0);
+ gsk_gl_driver_bind_source_texture (self->gl_driver, item->texture_id);
+ }
+ break;
+
case MODE_TEXTURE:
{
g_assert(item->texture_id != 0);
@@ -980,7 +1035,6 @@ gsk_gl_renderer_add_render_item (GskGLRenderer *self,
if (gsk_render_node_get_node_type (child) != GSK_TEXTURE_NODE)
{
-
graphene_matrix_t p;
graphene_matrix_t identity;
@@ -1099,6 +1153,104 @@ gsk_gl_renderer_add_render_item (GskGLRenderer *self,
}
return;
+ case GSK_TEXT_NODE:
+ {
+ const PangoFont *font = gsk_text_node_peek_font (node);
+ const PangoGlyphInfo *glyphs = gsk_text_node_peek_glyphs (node);
+ guint num_glyphs = gsk_text_node_get_num_glyphs (node);
+ int i;
+ int x_position = 0;
+ int x = gsk_text_node_get_x (node);
+ int y = gsk_text_node_get_y (node);
+
+ /* We use one quad per character, unlike the other nodes which
+ * use at most one quad altogether */
+ for (i = 0; i < num_glyphs; i++)
+ {
+ const PangoGlyphInfo *gi = &glyphs[i];
+ const GskGLCachedGlyph *glyph;
+ int glyph_x, glyph_y, glyph_w, glyph_h;
+ float tx, ty, tx2, ty2;
+ double cx;
+ double cy;
+
+ if (gi->glyph == PANGO_GLYPH_EMPTY ||
+ (gi->glyph & PANGO_GLYPH_UNKNOWN_FLAG) > 0)
+ continue;
+
+ glyph = gsk_gl_glyph_cache_lookup (&self->glyph_cache,
+ TRUE,
+ (PangoFont *)font,
+ gi->glyph,
+ self->scale_factor);
+
+ /* e.g. whitespace */
+ if (glyph->draw_width <= 0 || glyph->draw_height <= 0)
+ {
+ x_position += gi->geometry.width;
+ continue;
+ }
+ cx = (double)(x_position + gi->geometry.x_offset) / PANGO_SCALE;
+ cy = (double)(gi->geometry.y_offset) / PANGO_SCALE;
+
+ /* If the font has color glyphs, we don't need to recolor anything */
+ if (font_has_color_glyphs (font))
+ {
+ item.mode = MODE_BLIT;
+ item.program = &self->blit_program;
+ }
+ else
+ {
+ item.mode = MODE_COLORING;
+ item.program = &self->coloring_program;
+ item.color_data.color = *gsk_text_node_peek_color (node);
+ }
+
+ item.texture_id = gsk_gl_glyph_cache_get_glyph_image (&self->glyph_cache, glyph)->texture_id;
+
+ {
+ tx = glyph->tx;
+ ty = glyph->ty;
+ tx2 = tx + glyph->tw;
+ ty2 = ty + glyph->th;
+
+ glyph_x = x + cx + glyph->draw_x;
+ glyph_y = y + cy + glyph->draw_y;
+ glyph_w = glyph->draw_width;
+ glyph_h = glyph->draw_height;
+
+ item.min.x = glyph_x;
+ item.min.y = glyph_y;
+ item.size.width = glyph_w;
+ item.size.height = glyph_h;
+ item.max.x = item.min.x + item.size.width;
+ item.max.y = item.min.y + item.size.height;
+
+ GskQuadVertex vertex_data[N_VERTICES] = {
+ { { glyph_x, glyph_y }, { tx, ty }, },
+ { { glyph_x, glyph_y + glyph_h }, { tx, ty2 }, },
+ { { glyph_x + glyph_w, glyph_y }, { tx2, ty }, },
+
+ { { glyph_x + glyph_w, glyph_y + glyph_h }, { tx2, ty2 }, },
+ { { glyph_x, glyph_y + glyph_h }, { tx, ty2 }, },
+ { { glyph_x + glyph_w, glyph_y }, { tx2, ty }, },
+ };
+
+ item.vao_id = gsk_gl_driver_create_vao_for_quad (self->gl_driver,
+ item.program->position_location,
+ item.program->uv_location,
+ N_VERTICES,
+ vertex_data);
+ }
+
+
+ g_array_append_val (render_items, item);
+
+ x_position += gi->geometry.width;
+ }
+ }
+ return;
+
case GSK_NOT_A_RENDER_NODE:
case GSK_CONTAINER_NODE:
g_assert_not_reached ();
@@ -1108,7 +1260,6 @@ gsk_gl_renderer_add_render_item (GskGLRenderer *self,
case GSK_BORDER_NODE:
case GSK_INSET_SHADOW_NODE:
case GSK_OUTSET_SHADOW_NODE:
- case GSK_TEXT_NODE:
case GSK_BLUR_NODE:
case GSK_SHADOW_NODE:
case GSK_CROSS_FADE_NODE:
@@ -1273,8 +1424,8 @@ gsk_gl_renderer_setup_render_mode (GskGLRenderer *self)
window_height = gdk_window_get_height (window) * self->scale_factor;
- cairo_region_get_extents (clip, &extents);
- /*cairo_region_get_rectangle (clip, 0, &extents);*/
+ /*cairo_region_get_extents (clip, &extents);*/
+ cairo_region_get_rectangle (clip, 0, &extents);
glEnable (GL_SCISSOR_TEST);
glScissor (extents.x * self->scale_factor,
@@ -1333,6 +1484,7 @@ gsk_gl_renderer_do_render (GskRenderer *renderer,
graphene_matrix_scale (&projection, 1, -1, 1);
gsk_gl_driver_begin_frame (self->gl_driver);
+ gsk_gl_glyph_cache_begin_frame (&self->glyph_cache);
gsk_gl_renderer_validate_tree (self, root, &projection);
#ifdef G_ENABLE_DEBUG
@@ -1468,6 +1620,7 @@ gsk_gl_renderer_init (GskGLRenderer *self)
{
gsk_ensure_resources ();
+
self->render_items = g_array_new (FALSE, FALSE, sizeof (RenderItem));
g_array_set_clear_func (self->render_items, (GDestroyNotify)destroy_render_item);
self->scale_factor = 1;
diff --git a/gsk/meson.build b/gsk/meson.build
index 28447a3..03c1f6a 100644
--- a/gsk/meson.build
+++ b/gsk/meson.build
@@ -5,6 +5,7 @@ gsk_private_source_shaders = [
'resources/glsl/blit.vs.glsl',
'resources/glsl/color.fs.glsl',
'resources/glsl/color.vs.glsl',
+ 'resources/glsl/coloring.fs.glsl',
'resources/glsl/color_matrix.fs.glsl',
'resources/glsl/color_matrix.vs.glsl',
'resources/glsl/linear_gradient.fs.glsl',
@@ -30,6 +31,8 @@ gsk_private_sources = files([
'gskgldriver.c',
'gskglprofiler.c',
'gskglrenderer.c',
+ 'gskglglyphcache.c',
+ 'gskglimage.c',
'gskprivate.c',
'gskprofiler.c',
'gskshaderbuilder.c',
diff --git a/gsk/resources/glsl/coloring.fs.glsl b/gsk/resources/glsl/coloring.fs.glsl
new file mode 100644
index 0000000..8bb1d63
--- /dev/null
+++ b/gsk/resources/glsl/coloring.fs.glsl
@@ -0,0 +1,12 @@
+
+uniform vec4 uColor;
+
+void main() {
+ vec4 diffuse = Texture(uSource, vUv);
+ vec4 color = uColor;
+
+ // pre-multiply
+ color.rgb *= color.a;
+
+ setOutputColor((diffuse * color) * uAlpha);
+}
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