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mutter-performance-source/src/compositor/meta-shaped-texture.c
Jasper St. Pierre 1e6b3faa83 Fix the input region not working properly 
The input region was set on the shaped texture, but the shaped texture
was never picked properly, as it was never set to be reactive. Move the
pick implementation and reactivity to the MetaSurfaceActor, and update
the code everywhere else to expect a MetaSurfaceActor.
2014-02-18 21:29:23 -05:00

866 lines
26 KiB
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/*
* Authored By Neil Roberts <neil@linux.intel.com>
* and Jasper St. Pierre <jstpierre@mecheye.net>
*
* Copyright (C) 2008 Intel Corporation
* Copyright (C) 2012 Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
/**
* SECTION:meta-shaped-texture
* @title: MetaShapedTexture
* @short_description: An actor to draw a masked texture.
*/
#include <config.h>
#include <meta/meta-shaped-texture.h>
#include <meta/util.h>
#include "clutter-utils.h"
#include "meta-texture-tower.h"
#include "meta-shaped-texture-private.h"
#include <clutter/clutter.h>
#include <cogl/cogl.h>
#include <gdk/gdk.h> /* for gdk_rectangle_intersect() */
#include "meta-cullable.h"
static void meta_shaped_texture_dispose (GObject *object);
static void meta_shaped_texture_paint (ClutterActor *actor);
static void meta_shaped_texture_get_preferred_width (ClutterActor *self,
gfloat for_height,
gfloat *min_width_p,
gfloat *natural_width_p);
static void meta_shaped_texture_get_preferred_height (ClutterActor *self,
gfloat for_width,
gfloat *min_height_p,
gfloat *natural_height_p);
static gboolean meta_shaped_texture_get_paint_volume (ClutterActor *self, ClutterPaintVolume *volume);
static void cullable_iface_init (MetaCullableInterface *iface);
G_DEFINE_TYPE_WITH_CODE (MetaShapedTexture, meta_shaped_texture, CLUTTER_TYPE_ACTOR,
G_IMPLEMENT_INTERFACE (META_TYPE_CULLABLE, cullable_iface_init));
#define META_SHAPED_TEXTURE_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), META_TYPE_SHAPED_TEXTURE, \
MetaShapedTexturePrivate))
struct _MetaShapedTexturePrivate
{
MetaTextureTower *paint_tower;
CoglTexture *texture;
CoglTexture *mask_texture;
/* The region containing only fully opaque pixels */
cairo_region_t *opaque_region;
/* MetaCullable regions, see that documentation for more details */
cairo_region_t *clip_region;
cairo_region_t *unobscured_region;
guint tex_width, tex_height;
guint create_mipmaps : 1;
};
static void
meta_shaped_texture_class_init (MetaShapedTextureClass *klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
ClutterActorClass *actor_class = (ClutterActorClass *) klass;
gobject_class->dispose = meta_shaped_texture_dispose;
actor_class->get_preferred_width = meta_shaped_texture_get_preferred_width;
actor_class->get_preferred_height = meta_shaped_texture_get_preferred_height;
actor_class->paint = meta_shaped_texture_paint;
actor_class->get_paint_volume = meta_shaped_texture_get_paint_volume;
g_type_class_add_private (klass, sizeof (MetaShapedTexturePrivate));
}
static void
meta_shaped_texture_init (MetaShapedTexture *self)
{
MetaShapedTexturePrivate *priv;
priv = self->priv = META_SHAPED_TEXTURE_GET_PRIVATE (self);
priv->paint_tower = meta_texture_tower_new ();
priv->texture = NULL;
priv->mask_texture = NULL;
priv->create_mipmaps = TRUE;
}
static void
set_unobscured_region (MetaShapedTexture *self,
cairo_region_t *unobscured_region)
{
MetaShapedTexturePrivate *priv = self->priv;
g_clear_pointer (&priv->unobscured_region, (GDestroyNotify) cairo_region_destroy);
if (unobscured_region)
{
cairo_rectangle_int_t bounds = { 0, 0, priv->tex_width, priv->tex_height };
priv->unobscured_region = cairo_region_copy (unobscured_region);
cairo_region_intersect_rectangle (priv->unobscured_region, &bounds);
}
}
static void
set_clip_region (MetaShapedTexture *self,
cairo_region_t *clip_region)
{
MetaShapedTexturePrivate *priv = self->priv;
g_clear_pointer (&priv->clip_region, (GDestroyNotify) cairo_region_destroy);
if (clip_region)
priv->clip_region = cairo_region_copy (clip_region);
}
static void
meta_shaped_texture_dispose (GObject *object)
{
MetaShapedTexture *self = (MetaShapedTexture *) object;
MetaShapedTexturePrivate *priv = self->priv;
if (priv->paint_tower)
meta_texture_tower_free (priv->paint_tower);
priv->paint_tower = NULL;
g_clear_pointer (&priv->texture, cogl_object_unref);
g_clear_pointer (&priv->opaque_region, cairo_region_destroy);
meta_shaped_texture_set_mask_texture (self, NULL);
set_unobscured_region (self, NULL);
set_clip_region (self, NULL);
G_OBJECT_CLASS (meta_shaped_texture_parent_class)->dispose (object);
}
static CoglPipeline *
get_unmasked_pipeline (CoglContext *ctx)
{
return cogl_pipeline_new (ctx);
}
static CoglPipeline *
get_masked_pipeline (CoglContext *ctx)
{
static CoglPipeline *template = NULL;
if (G_UNLIKELY (template == NULL))
{
template = cogl_pipeline_new (ctx);
cogl_pipeline_set_layer_combine (template, 1,
"RGBA = MODULATE (PREVIOUS, TEXTURE[A])",
NULL);
}
return cogl_pipeline_copy (template);
}
static CoglPipeline *
get_unblended_pipeline (CoglContext *ctx)
{
static CoglPipeline *template = NULL;
if (G_UNLIKELY (template == NULL))
{
CoglColor color;
template = cogl_pipeline_new (ctx);
cogl_color_init_from_4ub (&color, 255, 255, 255, 255);
cogl_pipeline_set_blend (template,
"RGBA = ADD (SRC_COLOR, 0)",
NULL);
cogl_pipeline_set_color (template, &color);
}
return cogl_pipeline_copy (template);
}
static void
paint_clipped_rectangle (CoglFramebuffer *fb,
CoglPipeline *pipeline,
cairo_rectangle_int_t *rect,
ClutterActorBox *alloc)
{
float coords[8];
float x1, y1, x2, y2;
x1 = rect->x;
y1 = rect->y;
x2 = rect->x + rect->width;
y2 = rect->y + rect->height;
coords[0] = rect->x / (alloc->x2 - alloc->x1);
coords[1] = rect->y / (alloc->y2 - alloc->y1);
coords[2] = (rect->x + rect->width) / (alloc->x2 - alloc->x1);
coords[3] = (rect->y + rect->height) / (alloc->y2 - alloc->y1);
coords[4] = coords[0];
coords[5] = coords[1];
coords[6] = coords[2];
coords[7] = coords[3];
cogl_framebuffer_draw_multitextured_rectangle (fb, pipeline,
x1, y1, x2, y2,
&coords[0], 8);
}
static void
set_cogl_texture (MetaShapedTexture *stex,
CoglTexture *cogl_tex)
{
MetaShapedTexturePrivate *priv;
guint width, height;
g_return_if_fail (META_IS_SHAPED_TEXTURE (stex));
priv = stex->priv;
if (priv->texture)
cogl_object_unref (priv->texture);
priv->texture = cogl_tex;
if (cogl_tex != NULL)
{
cogl_object_ref (cogl_tex);
width = cogl_texture_get_width (COGL_TEXTURE (cogl_tex));
height = cogl_texture_get_height (COGL_TEXTURE (cogl_tex));
if (width != priv->tex_width ||
height != priv->tex_height)
{
priv->tex_width = width;
priv->tex_height = height;
clutter_actor_queue_relayout (CLUTTER_ACTOR (stex));
}
}
else
{
/* size changed to 0 going to an invalid handle */
priv->tex_width = 0;
priv->tex_height = 0;
clutter_actor_queue_relayout (CLUTTER_ACTOR (stex));
}
/* NB: We don't queue a redraw of the actor here because we don't
* know how much of the buffer has changed with respect to the
* previous buffer. We only queue a redraw in response to surface
* damage. */
if (priv->create_mipmaps)
meta_texture_tower_set_base_texture (priv->paint_tower, cogl_tex);
}
static void
meta_shaped_texture_paint (ClutterActor *actor)
{
MetaShapedTexture *stex = (MetaShapedTexture *) actor;
MetaShapedTexturePrivate *priv = stex->priv;
guint tex_width, tex_height;
guchar opacity;
CoglContext *ctx;
CoglFramebuffer *fb;
CoglPipeline *pipeline = NULL;
CoglTexture *paint_tex;
ClutterActorBox alloc;
cairo_region_t *blended_region = NULL;
CoglPipelineFilter filter;
if (priv->clip_region && cairo_region_is_empty (priv->clip_region))
return;
if (!CLUTTER_ACTOR_IS_REALIZED (CLUTTER_ACTOR (stex)))
clutter_actor_realize (CLUTTER_ACTOR (stex));
/* The GL EXT_texture_from_pixmap extension does allow for it to be
* used together with SGIS_generate_mipmap, however this is very
* rarely supported. Also, even when it is supported there
* are distinct performance implications from:
*
* - Updating mipmaps that we don't need
* - Having to reallocate pixmaps on the server into larger buffers
*
* So, we just unconditionally use our mipmap emulation code. If we
* wanted to use SGIS_generate_mipmap, we'd have to query COGL to
* see if it was supported (no API currently), and then if and only
* if that was the case, set the clutter texture quality to HIGH.
* Setting the texture quality to high without SGIS_generate_mipmap
* support for TFP textures will result in fallbacks to XGetImage.
*/
if (priv->create_mipmaps)
paint_tex = meta_texture_tower_get_paint_texture (priv->paint_tower);
else
paint_tex = COGL_TEXTURE (priv->texture);
if (paint_tex == NULL)
return;
tex_width = priv->tex_width;
tex_height = priv->tex_height;
if (tex_width == 0 || tex_height == 0) /* no contents yet */
return;
/* Use nearest-pixel interpolation if the texture is unscaled. This
* improves performance, especially with software rendering.
*/
filter = COGL_PIPELINE_FILTER_LINEAR;
if (!clutter_actor_is_in_clone_paint (actor) && meta_actor_is_untransformed (actor, NULL, NULL))
filter = COGL_PIPELINE_FILTER_NEAREST;
ctx = clutter_backend_get_cogl_context (clutter_get_default_backend ());
fb = cogl_get_draw_framebuffer ();
opacity = clutter_actor_get_paint_opacity (actor);
clutter_actor_get_allocation_box (actor, &alloc);
if (priv->opaque_region != NULL && opacity == 255)
{
CoglPipeline *opaque_pipeline;
cairo_region_t *region;
int n_rects;
int i;
if (priv->clip_region != NULL)
{
region = cairo_region_copy (priv->clip_region);
cairo_region_intersect (region, priv->opaque_region);
}
else
{
region = cairo_region_reference (priv->opaque_region);
}
if (cairo_region_is_empty (region))
goto paint_blended;
opaque_pipeline = get_unblended_pipeline (ctx);
cogl_pipeline_set_layer_texture (opaque_pipeline, 0, paint_tex);
cogl_pipeline_set_layer_filters (opaque_pipeline, 0, filter, filter);
n_rects = cairo_region_num_rectangles (region);
for (i = 0; i < n_rects; i++)
{
cairo_rectangle_int_t rect;
cairo_region_get_rectangle (region, i, &rect);
paint_clipped_rectangle (fb, opaque_pipeline, &rect, &alloc);
}
cogl_object_unref (opaque_pipeline);
if (priv->clip_region != NULL)
{
blended_region = cairo_region_copy (priv->clip_region);
}
else
{
cairo_rectangle_int_t rect = { 0, 0, tex_width, tex_height };
blended_region = cairo_region_create_rectangle (&rect);
}
cairo_region_subtract (blended_region, priv->opaque_region);
paint_blended:
cairo_region_destroy (region);
}
if (blended_region == NULL && priv->clip_region != NULL)
blended_region = cairo_region_reference (priv->clip_region);
if (blended_region != NULL && cairo_region_is_empty (blended_region))
goto out;
if (priv->mask_texture == NULL)
{
pipeline = get_unmasked_pipeline (ctx);
}
else
{
pipeline = get_masked_pipeline (ctx);
cogl_pipeline_set_layer_texture (pipeline, 1, priv->mask_texture);
cogl_pipeline_set_layer_filters (pipeline, 1, filter, filter);
}
cogl_pipeline_set_layer_texture (pipeline, 0, paint_tex);
cogl_pipeline_set_layer_filters (pipeline, 0, filter, filter);
{
CoglColor color;
cogl_color_init_from_4ub (&color, opacity, opacity, opacity, opacity);
cogl_pipeline_set_color (pipeline, &color);
}
if (blended_region != NULL)
{
int n_rects;
/* Limit to how many separate rectangles we'll draw; beyond this just
* fall back and draw the whole thing */
# define MAX_RECTS 16
n_rects = cairo_region_num_rectangles (blended_region);
if (n_rects <= MAX_RECTS)
{
int i;
cairo_rectangle_int_t tex_rect = { 0, 0, tex_width, tex_height };
for (i = 0; i < n_rects; i++)
{
cairo_rectangle_int_t rect;
cairo_region_get_rectangle (blended_region, i, &rect);
if (!gdk_rectangle_intersect (&tex_rect, &rect, &rect))
continue;
paint_clipped_rectangle (fb, pipeline, &rect, &alloc);
}
goto out;
}
}
cogl_framebuffer_draw_rectangle (fb, pipeline,
0, 0,
alloc.x2 - alloc.x1,
alloc.y2 - alloc.y1);
out:
if (pipeline != NULL)
cogl_object_unref (pipeline);
if (blended_region != NULL)
cairo_region_destroy (blended_region);
}
static void
meta_shaped_texture_get_preferred_width (ClutterActor *self,
gfloat for_height,
gfloat *min_width_p,
gfloat *natural_width_p)
{
MetaShapedTexturePrivate *priv;
g_return_if_fail (META_IS_SHAPED_TEXTURE (self));
priv = META_SHAPED_TEXTURE (self)->priv;
if (min_width_p)
*min_width_p = 0;
if (natural_width_p)
*natural_width_p = priv->tex_width;
}
static void
meta_shaped_texture_get_preferred_height (ClutterActor *self,
gfloat for_width,
gfloat *min_height_p,
gfloat *natural_height_p)
{
MetaShapedTexturePrivate *priv;
g_return_if_fail (META_IS_SHAPED_TEXTURE (self));
priv = META_SHAPED_TEXTURE (self)->priv;
if (min_height_p)
*min_height_p = 0;
if (natural_height_p)
*natural_height_p = priv->tex_height;
}
static gboolean
meta_shaped_texture_get_paint_volume (ClutterActor *actor,
ClutterPaintVolume *volume)
{
MetaShapedTexture *self = META_SHAPED_TEXTURE (actor);
cairo_rectangle_int_t unobscured_bounds;
if (!clutter_paint_volume_set_from_allocation (volume, actor))
return FALSE;
if (meta_shaped_texture_get_unobscured_bounds (self, &unobscured_bounds))
{
ClutterVertex origin;
cairo_rectangle_int_t bounds;
/* I hate ClutterPaintVolume so much... */
clutter_paint_volume_get_origin (volume, &origin);
bounds.x = origin.x;
bounds.y = origin.y;
bounds.width = clutter_paint_volume_get_width (volume);
bounds.height = clutter_paint_volume_get_height (volume);
gdk_rectangle_intersect (&bounds, &unobscured_bounds, &bounds);
origin.x = bounds.x;
origin.y = bounds.y;
clutter_paint_volume_set_origin (volume, &origin);
clutter_paint_volume_set_width (volume, bounds.width);
clutter_paint_volume_set_height (volume, bounds.height);
}
return TRUE;
}
void
meta_shaped_texture_set_create_mipmaps (MetaShapedTexture *stex,
gboolean create_mipmaps)
{
MetaShapedTexturePrivate *priv;
g_return_if_fail (META_IS_SHAPED_TEXTURE (stex));
priv = stex->priv;
create_mipmaps = create_mipmaps != FALSE;
if (create_mipmaps != priv->create_mipmaps)
{
CoglTexture *base_texture;
priv->create_mipmaps = create_mipmaps;
base_texture = create_mipmaps ? priv->texture : NULL;
meta_texture_tower_set_base_texture (priv->paint_tower, base_texture);
}
}
void
meta_shaped_texture_set_mask_texture (MetaShapedTexture *stex,
CoglTexture *mask_texture)
{
MetaShapedTexturePrivate *priv;
g_return_if_fail (META_IS_SHAPED_TEXTURE (stex));
priv = stex->priv;
g_clear_pointer (&priv->mask_texture, cogl_object_unref);
if (mask_texture != NULL)
{
priv->mask_texture = mask_texture;
cogl_object_ref (priv->mask_texture);
}
clutter_actor_queue_redraw (CLUTTER_ACTOR (stex));
}
static cairo_region_t *
effective_unobscured_region (MetaShapedTexture *self)
{
MetaShapedTexturePrivate *priv = self->priv;
return clutter_actor_has_mapped_clones (CLUTTER_ACTOR (self)) ? NULL : priv->unobscured_region;
}
gboolean
meta_shaped_texture_get_unobscured_bounds (MetaShapedTexture *self,
cairo_rectangle_int_t *unobscured_bounds)
{
cairo_region_t *unobscured_region = effective_unobscured_region (self);
if (unobscured_region)
{
cairo_region_get_extents (unobscured_region, unobscured_bounds);
return TRUE;
}
else
return FALSE;
}
gboolean
meta_shaped_texture_is_obscured (MetaShapedTexture *self)
{
cairo_region_t *unobscured_region = effective_unobscured_region (self);
if (unobscured_region)
return cairo_region_is_empty (unobscured_region);
else
return FALSE;
}
/**
* meta_shaped_texture_update_area:
* @stex: #MetaShapedTexture
* @x: the x coordinate of the damaged area
* @y: the y coordinate of the damaged area
* @width: the width of the damaged area
* @height: the height of the damaged area
*
* Repairs the damaged area indicated by @x, @y, @width and @height
* and potentially queues a redraw.
*
* Return value: Whether a redraw have been queued or not
*/
gboolean
meta_shaped_texture_update_area (MetaShapedTexture *stex,
int x,
int y,
int width,
int height)
{
MetaShapedTexturePrivate *priv;
cairo_region_t *unobscured_region;
const cairo_rectangle_int_t clip = { x, y, width, height };
priv = stex->priv;
if (priv->texture == NULL)
return FALSE;
meta_texture_tower_update_area (priv->paint_tower, x, y, width, height);
unobscured_region = effective_unobscured_region (stex);
if (unobscured_region)
{
cairo_region_t *intersection;
if (cairo_region_is_empty (unobscured_region))
return FALSE;
intersection = cairo_region_copy (unobscured_region);
cairo_region_intersect_rectangle (intersection, &clip);
if (!cairo_region_is_empty (intersection))
{
cairo_rectangle_int_t damage_rect;
cairo_region_get_extents (intersection, &damage_rect);
clutter_actor_queue_redraw_with_clip (CLUTTER_ACTOR (stex), &damage_rect);
cairo_region_destroy (intersection);
return TRUE;
}
cairo_region_destroy (intersection);
return FALSE;
}
else
{
clutter_actor_queue_redraw_with_clip (CLUTTER_ACTOR (stex), &clip);
return TRUE;
}
}
/**
* meta_shaped_texture_set_texture:
* @stex: The #MetaShapedTexture
* @pixmap: The #CoglTexture to display
*/
void
meta_shaped_texture_set_texture (MetaShapedTexture *stex,
CoglTexture *texture)
{
g_return_if_fail (META_IS_SHAPED_TEXTURE (stex));
set_cogl_texture (stex, texture);
}
/**
* meta_shaped_texture_get_texture:
* @stex: The #MetaShapedTexture
*
* Returns: (transfer none): the unshaped texture
*/
CoglTexture *
meta_shaped_texture_get_texture (MetaShapedTexture *stex)
{
g_return_val_if_fail (META_IS_SHAPED_TEXTURE (stex), NULL);
return COGL_TEXTURE (stex->priv->texture);
}
/**
* meta_shaped_texture_set_opaque_region:
* @stex: a #MetaShapedTexture
* @opaque_region: (transfer full): the region of the texture that
* can have blending turned off.
*
* As most windows have a large portion that does not require blending,
* we can easily turn off blending if we know the areas that do not
* require blending. This sets the region where we will not blend for
* optimization purposes.
*/
void
meta_shaped_texture_set_opaque_region (MetaShapedTexture *stex,
cairo_region_t *opaque_region)
{
MetaShapedTexturePrivate *priv;
g_return_if_fail (META_IS_SHAPED_TEXTURE (stex));
priv = stex->priv;
if (priv->opaque_region)
cairo_region_destroy (priv->opaque_region);
if (opaque_region)
priv->opaque_region = cairo_region_reference (opaque_region);
else
priv->opaque_region = NULL;
}
/**
* meta_shaped_texture_get_image:
* @stex: A #MetaShapedTexture
* @clip: A clipping rectangle, to help prevent extra processing.
* In the case that the clipping rectangle is partially or fully
* outside the bounds of the texture, the rectangle will be clipped.
*
* Flattens the two layers of the shaped texture into one ARGB32
* image by alpha blending the two images, and returns the flattened
* image.
*
* Returns: (transfer full): a new cairo surface to be freed with
* cairo_surface_destroy().
*/
cairo_surface_t *
meta_shaped_texture_get_image (MetaShapedTexture *stex,
cairo_rectangle_int_t *clip)
{
CoglTexture *texture, *mask_texture;
cairo_rectangle_int_t texture_rect = { 0, 0, 0, 0 };
cairo_surface_t *surface;
g_return_val_if_fail (META_IS_SHAPED_TEXTURE (stex), NULL);
texture = COGL_TEXTURE (stex->priv->texture);
if (texture == NULL)
return NULL;
texture_rect.width = cogl_texture_get_width (texture);
texture_rect.height = cogl_texture_get_height (texture);
if (clip != NULL)
{
/* GdkRectangle is just a typedef of cairo_rectangle_int_t,
* so we can use the gdk_rectangle_* APIs on these. */
if (!gdk_rectangle_intersect (&texture_rect, clip, clip))
return NULL;
}
if (clip != NULL)
texture = cogl_texture_new_from_sub_texture (texture,
clip->x,
clip->y,
clip->width,
clip->height);
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
cogl_texture_get_width (texture),
cogl_texture_get_height (texture));
cogl_texture_get_data (texture, CLUTTER_CAIRO_FORMAT_ARGB32,
cairo_image_surface_get_stride (surface),
cairo_image_surface_get_data (surface));
cairo_surface_mark_dirty (surface);
if (clip != NULL)
cogl_object_unref (texture);
mask_texture = stex->priv->mask_texture;
if (mask_texture != NULL)
{
cairo_t *cr;
cairo_surface_t *mask_surface;
if (clip != NULL)
mask_texture = cogl_texture_new_from_sub_texture (mask_texture,
clip->x,
clip->y,
clip->width,
clip->height);
mask_surface = cairo_image_surface_create (CAIRO_FORMAT_A8,
cogl_texture_get_width (mask_texture),
cogl_texture_get_height (mask_texture));
cogl_texture_get_data (mask_texture, COGL_PIXEL_FORMAT_A_8,
cairo_image_surface_get_stride (mask_surface),
cairo_image_surface_get_data (mask_surface));
cairo_surface_mark_dirty (mask_surface);
cr = cairo_create (surface);
cairo_set_source_surface (cr, mask_surface, 0, 0);
cairo_set_operator (cr, CAIRO_OPERATOR_DEST_IN);
cairo_paint (cr);
cairo_destroy (cr);
cairo_surface_destroy (mask_surface);
if (clip != NULL)
cogl_object_unref (mask_texture);
}
return surface;
}
static void
meta_shaped_texture_cull_out (MetaCullable *cullable,
cairo_region_t *unobscured_region,
cairo_region_t *clip_region)
{
MetaShapedTexture *self = META_SHAPED_TEXTURE (cullable);
MetaShapedTexturePrivate *priv = self->priv;
set_unobscured_region (self, unobscured_region);
set_clip_region (self, clip_region);
if (clutter_actor_get_paint_opacity (CLUTTER_ACTOR (self)) == 0xff)
{
if (priv->opaque_region)
{
if (unobscured_region)
cairo_region_subtract (unobscured_region, priv->opaque_region);
if (clip_region)
cairo_region_subtract (clip_region, priv->opaque_region);
}
}
}
static void
meta_shaped_texture_reset_culling (MetaCullable *cullable)
{
MetaShapedTexture *self = META_SHAPED_TEXTURE (cullable);
set_clip_region (self, NULL);
}
static void
cullable_iface_init (MetaCullableInterface *iface)
{
iface->cull_out = meta_shaped_texture_cull_out;
iface->reset_culling = meta_shaped_texture_reset_culling;
}
ClutterActor *
meta_shaped_texture_new (void)
{
return g_object_new (META_TYPE_SHAPED_TEXTURE, NULL);
}
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