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glyph cache: Upload glyphs incrementally

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This commit is contained in:
Matthias Clasen 2017-09-20 10:02:29 -04:00
parent 7bbd4d41e0
commit b321b26a73
1 changed files with 95 additions and 48 deletions
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141
gsk/gskvulkanglyphcache.c
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@ -14,6 +14,7 @@ typedef struct {
int width, height;
int x, y, y0;
int num_glyphs;
GList *dirty_glyphs;
} Atlas;
struct _GskVulkanGlyphCache {
@ -38,7 +39,7 @@ static void glyph_cache_key_free (gpointer v);
static void glyph_cache_value_free (gpointer v);
static Atlas *
create_atlas (void)
create_atlas (GskVulkanGlyphCache *cache)
{
Atlas *atlas;
@ -48,9 +49,9 @@ create_atlas (void)
atlas->y0 = 1;
atlas->y = 1;
atlas->x = 1;
atlas->surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, atlas->width, atlas->height);
atlas->image = NULL;
atlas->num_glyphs = 0;
atlas->dirty_glyphs = NULL;
return atlas;
}
@ -63,6 +64,7 @@ free_atlas (gpointer v)
if (atlas->surface)
cairo_surface_destroy (atlas->surface);
g_clear_object (&atlas->image);
g_list_free_full (atlas->dirty_glyphs, g_free);
g_free (atlas);
}
@ -72,7 +74,6 @@ gsk_vulkan_glyph_cache_init (GskVulkanGlyphCache *cache)
cache->hash_table = g_hash_table_new_full (glyph_cache_hash, glyph_cache_equal,
glyph_cache_key_free, glyph_cache_value_free);
cache->atlases = g_ptr_array_new_with_free_func (free_atlas);
g_ptr_array_add (cache->atlases, create_atlas ());
}
static void
@ -80,8 +81,8 @@ gsk_vulkan_glyph_cache_finalize (GObject *object)
{
GskVulkanGlyphCache *cache = GSK_VULKAN_GLYPH_CACHE (object);
g_hash_table_unref (cache->hash_table);
g_ptr_array_unref (cache->atlases);
g_hash_table_unref (cache->hash_table);
G_OBJECT_CLASS (gsk_vulkan_glyph_cache_parent_class)->finalize (object);
}
@ -132,17 +133,19 @@ glyph_cache_value_free (gpointer v)
g_free (v);
}
typedef struct {
GlyphCacheKey *key;
GskVulkanCachedGlyph *value;
} DirtyGlyph;
static void
add_to_cache (GskVulkanGlyphCache *cache,
PangoFont *font,
PangoGlyph glyph,
GlyphCacheKey *key,
GskVulkanCachedGlyph *value)
{
cairo_t *cr;
cairo_scaled_font_t *scaled_font;
cairo_glyph_t cg;
Atlas *atlas;
int i;
DirtyGlyph *dirty;
for (i = 0; i < cache->atlases->len; i++)
{
@ -171,60 +174,87 @@ add_to_cache (GskVulkanGlyphCache *cache,
if (i == cache->atlases->len)
{
atlas = create_atlas ();
atlas = create_atlas (cache);
g_ptr_array_add (cache->atlases, atlas);
}
cr = cairo_create (atlas->surface);
value->tx = (float)atlas->x / atlas->width;
value->ty = (float)atlas->y0 / atlas->height;
value->tw = (float)value->draw_width / atlas->width;
value->th = (float)value->draw_height / atlas->height;
scaled_font = pango_cairo_font_get_scaled_font ((PangoCairoFont *)font);
if (G_UNLIKELY (!scaled_font || cairo_scaled_font_status (scaled_font) != CAIRO_STATUS_SUCCESS))
return;
value->texture_index = i;
cairo_set_scaled_font (cr, scaled_font);
cairo_set_source_rgba (cr, 1, 1, 1, 1);
cg.index = glyph;
cg.x = atlas->x - value->draw_x;
cg.y = atlas->y0 - value->draw_y;
cairo_show_glyphs (cr, &cg, 1);
cairo_destroy (cr);
dirty = g_new (DirtyGlyph, 1);
dirty->key = key;
dirty->value = value;
atlas->dirty_glyphs = g_list_prepend (atlas->dirty_glyphs, dirty);
atlas->x = atlas->x + value->draw_width + 1;
atlas->y = MAX (atlas->y, atlas->y0 + value->draw_height + 1);
atlas->num_glyphs++;
value->tx = (cg.x + value->draw_x) / atlas->width;
value->ty = (cg.y + value->draw_y) / atlas->height;
value->tw = (float)value->draw_width / atlas->width;
value->th = (float)value->draw_height / atlas->height;
value->texture_index = i;
g_clear_object (&atlas->image); /* force re-upload */
#ifdef G_ENABLE_DEBUG
if (GSK_DEBUG_CHECK(GLYPH_CACHE))
{
gchar buffer[256];
g_print ("Glyph cache:\n");
for (i = 0; i < cache->atlases->len; i++)
{
atlas = g_ptr_array_index (cache->atlases, i);
g_print ("\tAtlas %d (%dx%d): %d glyphs, filled to %d, %d / %d\n",
i, atlas->width, atlas->height, atlas->num_glyphs,
g_print ("\tAtlas %d (%dx%d): %d glyphs (%d dirty), filled to %d, %d / %d\n",
i, atlas->width, atlas->height,
atlas->num_glyphs, g_list_length (atlas->dirty_glyphs),
atlas->x, atlas->y0, atlas->y);
snprintf (buffer, sizeof (buffer), "gsk-vulkan-glyph-cache-%d-%d.png", i, atlas->num_glyphs);
cairo_surface_write_to_png (atlas->surface, buffer);
}
}
#endif
}
static void
upload_glyph (Atlas *atlas,
GskVulkanUploader *uploader,
GlyphCacheKey *key,
GskVulkanCachedGlyph *value)
{
cairo_surface_t *surface;
cairo_t *cr;
cairo_scaled_font_t *scaled_font;
cairo_glyph_t cg;
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
value->draw_width,
value->draw_height);
cr = cairo_create (surface);
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;
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);
gsk_vulkan_image_upload_region (atlas->image,
uploader,
cairo_image_surface_get_data (surface),
cairo_image_surface_get_width (surface),
cairo_image_surface_get_height (surface),
cairo_image_surface_get_stride (surface),
(gsize)(value->tx * atlas->width),
(gsize)(value->ty * atlas->height));
cairo_surface_destroy (surface);
}
GskVulkanGlyphCache *
gsk_vulkan_glyph_cache_new (GdkVulkanContext *vulkan)
{
@ -232,6 +262,7 @@ gsk_vulkan_glyph_cache_new (GdkVulkanContext *vulkan)
cache = GSK_VULKAN_GLYPH_CACHE (g_object_new (GSK_TYPE_VULKAN_GLYPH_CACHE, NULL));
cache->vulkan = vulkan;
g_ptr_array_add (cache->atlases, create_atlas (cache));
return cache;
}
@ -255,6 +286,7 @@ gsk_vulkan_glyph_cache_lookup (GskVulkanGlyphCache *cache,
GlyphCacheKey *key;
PangoRectangle ink_rect;
key = g_new (GlyphCacheKey, 1);
value = g_new0 (GskVulkanCachedGlyph, 1);
pango_font_get_glyph_extents (font, glyph, &ink_rect, NULL);
@ -265,13 +297,12 @@ gsk_vulkan_glyph_cache_lookup (GskVulkanGlyphCache *cache,
value->draw_width = ink_rect.width;
value->draw_height = ink_rect.height;
if (ink_rect.width > 0 && ink_rect.height > 0)
add_to_cache (cache, font, glyph, value);
key = g_new (GlyphCacheKey, 1);
key->font = g_object_ref (font);
key->glyph = glyph;
if (ink_rect.width > 0 && ink_rect.height > 0)
add_to_cache (cache, key, value);
g_hash_table_insert (cache->hash_table, key, value);
}
@ -284,17 +315,33 @@ gsk_vulkan_glyph_cache_get_glyph_image (GskVulkanGlyphCache *cache,
guint index)
{
Atlas *atlas;
GList *l;
g_return_val_if_fail (index < cache->atlases->len, NULL);
atlas = g_ptr_array_index (cache->atlases, index);
if (atlas->image == NULL)
{
cairo_surface_t *surface;
/* FIXME: create the image without uploading data pointlessly */
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, atlas->width, atlas->height);
atlas->image = gsk_vulkan_image_new_from_data (uploader,
cairo_image_surface_get_data (atlas->surface),
cairo_image_surface_get_width (atlas->surface),
cairo_image_surface_get_height (atlas->surface),
cairo_image_surface_get_stride (atlas->surface));
cairo_image_surface_get_data (surface),
cairo_image_surface_get_width (surface),
cairo_image_surface_get_height (surface),
cairo_image_surface_get_stride (surface));
cairo_surface_destroy (surface);
}
for (l = atlas->dirty_glyphs; l; l = l->next)
{
DirtyGlyph *glyph = l->data;
upload_glyph (atlas, uploader, glyph->key, glyph->value);
}
g_list_free_full (atlas->dirty_glyphs, g_free);
atlas->dirty_glyphs = NULL;
return atlas->image;
}