gtk/gsk/gpu/gskgpudevice.c

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#include "config.h"
#include "gskgpudeviceprivate.h"
#include "gskgpuframeprivate.h"
#include "gskgpuuploadopprivate.h"
#include "gdk/gdkdisplayprivate.h"
#include "gdk/gdktextureprivate.h"
#define MAX_SLICES_PER_ATLAS 64
#define ATLAS_SIZE 1024
#define MAX_ATLAS_ITEM_SIZE 256
typedef struct _GskGpuCached GskGpuCached;
typedef struct _GskGpuCachedClass GskGpuCachedClass;
typedef struct _GskGpuCachedAtlas GskGpuCachedAtlas;
typedef struct _GskGpuCachedGlyph GskGpuCachedGlyph;
typedef struct _GskGpuCachedTexture GskGpuCachedTexture;
typedef struct _GskGpuDevicePrivate GskGpuDevicePrivate;
struct _GskGpuDevicePrivate
{
GdkDisplay *display;
gsize max_image_size;
GskGpuCached *first_cached;
GskGpuCached *last_cached;
guint cache_gc_source;
GHashTable *texture_cache;
GHashTable *glyph_cache;
GskGpuCachedAtlas *current_atlas;
};
G_DEFINE_TYPE_WITH_PRIVATE (GskGpuDevice, gsk_gpu_device, G_TYPE_OBJECT)
/* {{{ Cached base class */
struct _GskGpuCachedClass
{
gsize size;
void (* free) (GskGpuDevice *device,
GskGpuCached *cached);
gboolean (* should_collect) (GskGpuDevice *device,
GskGpuCached *cached,
gint64 timestsamp);
};
struct _GskGpuCached
{
const GskGpuCachedClass *class;
GskGpuCachedAtlas *atlas;
GskGpuCached *next;
GskGpuCached *prev;
};
static void
gsk_gpu_cached_free (GskGpuDevice *device,
GskGpuCached *cached)
{
GskGpuDevicePrivate *priv = gsk_gpu_device_get_instance_private (device);
if (cached->next)
cached->next->prev = cached->prev;
else
priv->last_cached = cached->prev;
if (cached->prev)
cached->prev->next = cached->next;
else
priv->first_cached = cached->next;
cached->class->free (device, cached);
}
static gboolean
gsk_gpu_cached_should_collect (GskGpuDevice *device,
GskGpuCached *cached,
gint64 timestamp)
{
return cached->class->should_collect (device, cached, timestamp);
}
static gpointer
gsk_gpu_cached_new (GskGpuDevice *device,
const GskGpuCachedClass *class,
GskGpuCachedAtlas *atlas)
{
GskGpuDevicePrivate *priv = gsk_gpu_device_get_instance_private (device);
GskGpuCached *cached;
cached = g_malloc0 (class->size);
cached->class = class;
cached->atlas = atlas;
cached->prev = priv->last_cached;
priv->last_cached = cached;
if (cached->prev)
cached->prev->next = cached;
else
priv->first_cached = cached;
return cached;
}
static void
gsk_gpu_cached_use (GskGpuDevice *device,
GskGpuCached *cached,
gint64 timestamp)
{
/* FIXME */
}
/* }}} */
/* {{{ CachedAtlas */
struct _GskGpuCachedAtlas
{
GskGpuCached parent;
GskGpuImage *image;
gsize n_slices;
struct {
gsize width;
gsize height;
} slices[MAX_SLICES_PER_ATLAS];
};
static void
gsk_gpu_cached_atlas_free (GskGpuDevice *device,
GskGpuCached *cached)
{
GskGpuCachedAtlas *self = (GskGpuCachedAtlas *) cached;
g_object_unref (self->image);
g_free (self);
}
static gboolean
gsk_gpu_cached_atlas_should_collect (GskGpuDevice *device,
GskGpuCached *cached,
gint64 timestamp)
{
/* FIXME */
return FALSE;
}
static const GskGpuCachedClass GSK_GPU_CACHED_ATLAS_CLASS =
{
sizeof (GskGpuCachedAtlas),
gsk_gpu_cached_atlas_free,
gsk_gpu_cached_atlas_should_collect
};
static GskGpuCachedAtlas *
gsk_gpu_cached_atlas_new (GskGpuDevice *device)
{
GskGpuCachedAtlas *self;
self = gsk_gpu_cached_new (device, &GSK_GPU_CACHED_ATLAS_CLASS, NULL);
self->image = GSK_GPU_DEVICE_GET_CLASS (device)->create_atlas_image (device, ATLAS_SIZE, ATLAS_SIZE);
return self;
}
/* }}} */
/* {{{ CachedTexture */
struct _GskGpuCachedTexture
{
GskGpuCached parent;
/* atomic */ GdkTexture *texture;
GskGpuImage *image;
};
static void
gsk_gpu_cached_texture_free (GskGpuDevice *device,
GskGpuCached *cached)
{
GskGpuCachedTexture *self = (GskGpuCachedTexture *) cached;
gboolean texture_still_alive;
texture_still_alive = g_atomic_pointer_exchange (&self->texture, NULL) != NULL;
g_object_unref (self->image);
if (!texture_still_alive)
g_free (self);
}
static gboolean
gsk_gpu_cached_texture_should_collect (GskGpuDevice *device,
GskGpuCached *cached,
gint64 timestamp)
{
/* FIXME */
return FALSE;
}
static const GskGpuCachedClass GSK_GPU_CACHED_TEXTURE_CLASS =
{
sizeof (GskGpuCachedTexture),
gsk_gpu_cached_texture_free,
gsk_gpu_cached_texture_should_collect
};
static void
gsk_gpu_cached_texture_destroy_cb (gpointer data)
{
GskGpuCachedTexture *cache = data;
gboolean cache_still_alive;
cache_still_alive = g_atomic_pointer_exchange (&cache->texture, NULL) != NULL;
if (!cache_still_alive)
g_free (cache);
}
static GskGpuCachedTexture *
gsk_gpu_cached_texture_new (GskGpuDevice *device,
GdkTexture *texture,
GskGpuImage *image)
{
GskGpuDevicePrivate *priv = gsk_gpu_device_get_instance_private (device);
GskGpuCachedTexture *self;
if (gdk_texture_get_render_data (texture, device))
gdk_texture_clear_render_data (texture);
else if ((self = g_hash_table_lookup (priv->texture_cache, texture)))
{
g_hash_table_remove (priv->texture_cache, texture);
g_object_weak_unref (G_OBJECT (texture), (GWeakNotify) gsk_gpu_cached_texture_destroy_cb, self);
}
self = gsk_gpu_cached_new (device, &GSK_GPU_CACHED_TEXTURE_CLASS, NULL);
self->texture = texture;
self->image = g_object_ref (image);
if (!gdk_texture_set_render_data (texture, device, self, gsk_gpu_cached_texture_destroy_cb))
{
g_object_weak_ref (G_OBJECT (texture), (GWeakNotify) gsk_gpu_cached_texture_destroy_cb, self);
g_hash_table_insert (priv->texture_cache, texture, self);
}
return self;
}
/* }}} */
/* {{{ CachedGlyph */
struct _GskGpuCachedGlyph
{
GskGpuCached parent;
PangoFont *font;
PangoGlyph glyph;
GskGpuGlyphLookupFlags flags;
float scale;
GskGpuImage *image;
graphene_rect_t bounds;
graphene_point_t origin;
};
static void
gsk_gpu_cached_glyph_free (GskGpuDevice *device,
GskGpuCached *cached)
{
GskGpuCachedGlyph *self = (GskGpuCachedGlyph *) cached;
g_object_unref (self->font);
g_object_unref (self->image);
g_free (self);
}
static gboolean
gsk_gpu_cached_glyph_should_collect (GskGpuDevice *device,
GskGpuCached *cached,
gint64 timestsamp)
{
/* FIXME */
return FALSE;
}
static guint
gsk_gpu_cached_glyph_hash (gconstpointer data)
{
const GskGpuCachedGlyph *glyph = data;
return GPOINTER_TO_UINT (glyph->font) ^
glyph->glyph ^
(glyph->flags << 24) ^
((guint) glyph->scale * PANGO_SCALE);
}
static gboolean
gsk_gpu_cached_glyph_equal (gconstpointer v1,
gconstpointer v2)
{
const GskGpuCachedGlyph *glyph1 = v1;
const GskGpuCachedGlyph *glyph2 = v2;
return glyph1->font == glyph2->font
&& glyph1->glyph == glyph2->glyph
&& glyph1->flags == glyph2->flags
&& glyph1->scale == glyph2->scale;
}
static const GskGpuCachedClass GSK_GPU_CACHED_GLYPH_CLASS =
{
sizeof (GskGpuCachedGlyph),
gsk_gpu_cached_glyph_free,
gsk_gpu_cached_glyph_should_collect
};
/* }}} */
/* {{{ GskGpuDevice */
void
gsk_gpu_device_gc (GskGpuDevice *self,
gint64 timestamp)
{
GskGpuDevicePrivate *priv = gsk_gpu_device_get_instance_private (self);
GskGpuCached *cached, *next;
for (cached = priv->first_cached; cached != NULL; cached = next)
{
next = cached->next;
if (gsk_gpu_cached_should_collect (self, cached, timestamp))
gsk_gpu_cached_free (self, priv->first_cached);
}
}
static void
gsk_gpu_device_clear_cache (GskGpuDevice *self)
{
GskGpuDevicePrivate *priv = gsk_gpu_device_get_instance_private (self);
for (GskGpuCached *cached = priv->first_cached; cached; cached = cached->next)
{
if (cached->prev == NULL)
g_assert (priv->first_cached == cached);
else
g_assert (cached->prev->next == cached);
if (cached->next == NULL)
g_assert (priv->last_cached == cached);
else
g_assert (cached->next->prev == cached);
}
while (priv->first_cached)
gsk_gpu_cached_free (self, priv->first_cached);
g_assert (priv->last_cached == NULL);
}
static void
gsk_gpu_device_dispose (GObject *object)
{
GskGpuDevice *self = GSK_GPU_DEVICE (object);
GskGpuDevicePrivate *priv = gsk_gpu_device_get_instance_private (self);
gsk_gpu_device_clear_cache (self);
g_hash_table_unref (priv->glyph_cache);
g_hash_table_unref (priv->texture_cache);
G_OBJECT_CLASS (gsk_gpu_device_parent_class)->dispose (object);
}
static void
gsk_gpu_device_finalize (GObject *object)
{
GskGpuDevice *self = GSK_GPU_DEVICE (object);
GskGpuDevicePrivate *priv = gsk_gpu_device_get_instance_private (self);
g_object_unref (priv->display);
G_OBJECT_CLASS (gsk_gpu_device_parent_class)->finalize (object);
}
static void
gsk_gpu_device_class_init (GskGpuDeviceClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->dispose = gsk_gpu_device_dispose;
object_class->finalize = gsk_gpu_device_finalize;
}
static void
gsk_gpu_device_init (GskGpuDevice *self)
{
GskGpuDevicePrivate *priv = gsk_gpu_device_get_instance_private (self);
priv->glyph_cache = g_hash_table_new (gsk_gpu_cached_glyph_hash,
gsk_gpu_cached_glyph_equal);
priv->texture_cache = g_hash_table_new (g_direct_hash,
g_direct_equal);
}
void
gsk_gpu_device_setup (GskGpuDevice *self,
GdkDisplay *display,
gsize max_image_size)
{
GskGpuDevicePrivate *priv = gsk_gpu_device_get_instance_private (self);
priv->display = g_object_ref (display);
priv->max_image_size = max_image_size;
}
GdkDisplay *
gsk_gpu_device_get_display (GskGpuDevice *self)
{
GskGpuDevicePrivate *priv = gsk_gpu_device_get_instance_private (self);
return priv->display;
}
gsize
gsk_gpu_device_get_max_image_size (GskGpuDevice *self)
{
GskGpuDevicePrivate *priv = gsk_gpu_device_get_instance_private (self);
return priv->max_image_size;
}
GskGpuImage *
gsk_gpu_device_create_offscreen_image (GskGpuDevice *self,
gboolean with_mipmap,
GdkMemoryDepth depth,
gsize width,
gsize height)
{
return GSK_GPU_DEVICE_GET_CLASS (self)->create_offscreen_image (self, with_mipmap, depth, width, height);
}
GskGpuImage *
gsk_gpu_device_create_upload_image (GskGpuDevice *self,
gboolean with_mipmap,
GdkMemoryFormat format,
gsize width,
gsize height)
{
return GSK_GPU_DEVICE_GET_CLASS (self)->create_upload_image (self, with_mipmap, format, width, height);
}
GskGpuImage *
gsk_gpu_device_create_download_image (GskGpuDevice *self,
GdkMemoryDepth depth,
gsize width,
gsize height)
{
return GSK_GPU_DEVICE_GET_CLASS (self)->create_download_image (self, depth, width, height);
}
/* This rounds up to the next number that has <= 2 bits set:
* 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, 128, ...
* That is roughly sqrt(2), so it should limit waste
*/
static gsize
round_up_atlas_size (gsize num)
{
gsize storage = g_bit_storage (num);
num = num + (((1 << storage) - 1) >> 2);
num &= (((gsize) 7) << storage) >> 2;
return num;
}
static gboolean
gsk_gpu_cached_atlas_allocate (GskGpuCachedAtlas *atlas,
gsize width,
gsize height,
gsize *out_x,
gsize *out_y)
{
gsize i;
gsize waste, slice_waste;
gsize best_slice;
gsize y, best_y;
gboolean can_add_slice;
best_y = 0;
best_slice = G_MAXSIZE;
can_add_slice = atlas->n_slices < MAX_SLICES_PER_ATLAS;
if (can_add_slice)
waste = height; /* Require less than 100% waste */
else
waste = G_MAXSIZE; /* Accept any slice, we can't make better ones */
for (i = 0, y = 0; i < atlas->n_slices; y += atlas->slices[i].height, i++)
{
if (atlas->slices[i].height < height || ATLAS_SIZE - atlas->slices[i].width < width)
continue;
slice_waste = atlas->slices[i].height - height;
if (slice_waste < waste)
{
waste = slice_waste;
best_slice = i;
best_y = y;
if (waste == 0)
break;
}
}
if (best_slice >= i && i == atlas->n_slices)
{
if (!can_add_slice)
return FALSE;
atlas->n_slices++;
if (atlas->n_slices == MAX_SLICES_PER_ATLAS)
atlas->slices[i].height = ATLAS_SIZE - y;
else
atlas->slices[i].height = round_up_atlas_size (MAX (height, 4));
atlas->slices[i].width = 0;
best_y = y;
best_slice = i;
}
*out_x = atlas->slices[best_slice].width;
*out_y = best_y;
atlas->slices[best_slice].width += width;
g_assert (atlas->slices[best_slice].width <= ATLAS_SIZE);
return TRUE;
}
static void
gsk_gpu_device_ensure_atlas (GskGpuDevice *self,
gboolean recreate,
gint64 timestamp)
{
GskGpuDevicePrivate *priv = gsk_gpu_device_get_instance_private (self);
if (priv->current_atlas && !recreate)
return;
priv->current_atlas = gsk_gpu_cached_atlas_new (self);
}
GskGpuImage *
gsk_gpu_device_get_atlas_image (GskGpuDevice *self)
{
GskGpuDevicePrivate *priv = gsk_gpu_device_get_instance_private (self);
gsk_gpu_device_ensure_atlas (self, FALSE, g_get_monotonic_time ());
return priv->current_atlas->image;
}
static GskGpuImage *
gsk_gpu_device_add_atlas_image (GskGpuDevice *self,
gint64 timestamp,
gsize width,
gsize height,
gsize *out_x,
gsize *out_y)
{
GskGpuDevicePrivate *priv = gsk_gpu_device_get_instance_private (self);
if (width > MAX_ATLAS_ITEM_SIZE || height > MAX_ATLAS_ITEM_SIZE)
return NULL;
gsk_gpu_device_ensure_atlas (self, FALSE, timestamp);
if (gsk_gpu_cached_atlas_allocate (priv->current_atlas, width, height, out_x, out_y))
{
gsk_gpu_cached_use (self, (GskGpuCached *) priv->current_atlas, timestamp);
return priv->current_atlas->image;
}
gsk_gpu_device_ensure_atlas (self, TRUE, timestamp);
if (gsk_gpu_cached_atlas_allocate (priv->current_atlas, width, height, out_x, out_y))
{
gsk_gpu_cached_use (self, (GskGpuCached *) priv->current_atlas, timestamp);
return priv->current_atlas->image;
}
return NULL;
}
GskGpuImage *
gsk_gpu_device_lookup_texture_image (GskGpuDevice *self,
GdkTexture *texture,
gint64 timestamp)
{
GskGpuDevicePrivate *priv = gsk_gpu_device_get_instance_private (self);
GskGpuCachedTexture *cache;
cache = gdk_texture_get_render_data (texture, self);
if (cache == NULL)
cache = g_hash_table_lookup (priv->texture_cache, texture);
if (cache)
{
return g_object_ref (cache->image);
}
return NULL;
}
void
gsk_gpu_device_cache_texture_image (GskGpuDevice *self,
GdkTexture *texture,
gint64 timestamp,
GskGpuImage *image)
{
GskGpuCachedTexture *cache;
cache = gsk_gpu_cached_texture_new (self, texture, image);
gsk_gpu_cached_use (self, (GskGpuCached *) cache, timestamp);
}
GskGpuImage *
gsk_gpu_device_lookup_glyph_image (GskGpuDevice *self,
GskGpuFrame *frame,
PangoFont *font,
PangoGlyph glyph,
GskGpuGlyphLookupFlags flags,
float scale,
graphene_rect_t *out_bounds,
graphene_point_t *out_origin)
{
GskGpuDevicePrivate *priv = gsk_gpu_device_get_instance_private (self);
GskGpuCachedGlyph lookup = {
.font = font,
.glyph = glyph,
.flags = flags,
.scale = scale
};
GskGpuCachedGlyph *cache;
PangoRectangle ink_rect;
graphene_rect_t rect;
graphene_point_t origin;
GskGpuImage *image;
gsize atlas_x, atlas_y, padding;
cache = g_hash_table_lookup (priv->glyph_cache, &lookup);
if (cache)
{
gsk_gpu_cached_use (self, (GskGpuCached *) cache, gsk_gpu_frame_get_timestamp (frame));
*out_bounds = cache->bounds;
*out_origin = cache->origin;
return cache->image;
}
cache = g_new (GskGpuCachedGlyph, 1);
pango_font_get_glyph_extents (font, glyph, &ink_rect, NULL);
origin.x = floor (ink_rect.x * scale / PANGO_SCALE);
origin.y = floor (ink_rect.y * scale / PANGO_SCALE);
rect.size.width = ceil ((ink_rect.x + ink_rect.width) * scale / PANGO_SCALE) - origin.x;
rect.size.height = ceil ((ink_rect.y + ink_rect.height) * scale / PANGO_SCALE) - origin.y;
padding = 1;
image = gsk_gpu_device_add_atlas_image (self,
gsk_gpu_frame_get_timestamp (frame),
rect.size.width + 2 * padding, rect.size.height + 2 * padding,
&atlas_x, &atlas_y);
if (image)
{
g_object_ref (image);
rect.origin.x = atlas_x + padding;
rect.origin.y = atlas_y + padding;
cache = gsk_gpu_cached_new (self, &GSK_GPU_CACHED_GLYPH_CLASS, priv->current_atlas);
}
else
{
image = gsk_gpu_device_create_upload_image (self, FALSE, GDK_MEMORY_DEFAULT, rect.size.width, rect.size.height),
rect.origin.x = 0;
rect.origin.y = 0;
padding = 0;
cache = gsk_gpu_cached_new (self, &GSK_GPU_CACHED_GLYPH_CLASS, NULL);
}
cache->font = g_object_ref (font),
cache->glyph = glyph,
cache->flags = flags,
cache->scale = scale,
cache->bounds = rect,
cache->image = image,
cache->origin = GRAPHENE_POINT_INIT (- origin.x + (flags & 3) / 4.f,
- origin.y + ((flags >> 2) & 3) / 4.f);
gsk_gpu_upload_glyph_op (frame,
cache->image,
font,
glyph,
&(cairo_rectangle_int_t) {
.x = rect.origin.x - padding,
.y = rect.origin.y - padding,
.width = rect.size.width + 2 * padding,
.height = rect.size.height + 2 * padding,
},
scale,
&GRAPHENE_POINT_INIT (cache->origin.x + 1,
cache->origin.y + 1));
g_hash_table_insert (priv->glyph_cache, cache, cache);
gsk_gpu_cached_use (self, (GskGpuCached *) cache, gsk_gpu_frame_get_timestamp (frame));
*out_bounds = cache->bounds;
*out_origin = cache->origin;
return cache->image;
}
/* }}} */