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gl: Add glyph cache

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Based on the one used by the vulkan renderer
This commit is contained in:
Timm Bäder 2017-11-18 14:30:57 +01:00
parent 3e23f6c22b
commit 4cf2a482ea
9 changed files with 806 additions and 6 deletions
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21
gsk/gskgldriver.c
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@ -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)
@ -511,6 +513,21 @@ gsk_gl_driver_get_texture_for_texture (GskGLDriver *driver,
return t->texture_id;
}
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,

3
gsk/gskgldriverprivate.h
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@ -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);

445
gsk/gskglglyphcache.c Normal file
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@ -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, &regions[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));
}

59
gsk/gskglglyphcacheprivate.h Normal file
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@ -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

68
gsk/gskglimage.c Normal file
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@ -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 = &regions[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
}

40
gsk/gskglimageprivate.h Normal file
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@ -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

161
gsk/gskglrenderer.c
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@ -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);
@ -949,7 +1004,6 @@ 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;
@ -1068,6 +1122,104 @@ 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 ();
@ -1077,7 +1229,6 @@ 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:
@ -1242,8 +1393,8 @@ 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,
@ -1302,6 +1453,7 @@ 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
@ -1437,6 +1589,7 @@ 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;

3
gsk/meson.build
View File

@ -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',

12
gsk/resources/glsl/coloring.fs.glsl Normal file
View File

@ -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);
}