brl/mutter
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
490f27efcb
mutter/src/compositor/meta-shaped-texture.c
Jonas Ådahl 490f27efcb shaped-texture: Use actual texture if tower returned NULL 
The texture tower can return no texture e.g. if the calculated level is
negative. This was handled before, but regressed with
e1370ee209. This fixes a potential crash
observed occasionally when starting Firefox nightly using the Wayland
backend in overview mode.
2019-01-05 09:36:46 +00:00

1340 lines
39 KiB
C
Raw Blame History

/*
* 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 "compositor/meta-shaped-texture-private.h"
#include <gdk/gdk.h>
#include "cogl/cogl.h"
#include "compositor/clutter-utils.h"
#include "compositor/meta-cullable.h"
#include "compositor/meta-texture-tower.h"
#include "compositor/region-utils.h"
#include "core/boxes-private.h"
#include "meta/meta-shaped-texture.h"
/* MAX_MIPMAPPING_FPS needs to be as small as possible for the best GPU
* performance, but higher than the refresh rate of commonly slow updating
* windows like top or a blinking cursor, so that such windows do get
* mipmapped.
*/
#define MAX_MIPMAPPING_FPS 5
#define MIN_MIPMAP_AGE_USEC (G_USEC_PER_SEC / MAX_MIPMAPPING_FPS)
/* MIN_FAST_UPDATES_BEFORE_UNMIPMAP allows windows to update themselves
* occasionally without causing mipmapping to be disabled, so long as such
* an update takes fewer update_area calls than:
*/
#define MIN_FAST_UPDATES_BEFORE_UNMIPMAP 20
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);
enum {
SIZE_CHANGED,
LAST_SIGNAL,
};
static guint signals[LAST_SIGNAL];
struct _MetaShapedTexture
{
ClutterActor parent;
MetaTextureTower *paint_tower;
CoglTexture *texture;
CoglTexture *mask_texture;
CoglSnippet *snippet;
CoglPipeline *base_pipeline;
CoglPipeline *masked_pipeline;
CoglPipeline *unblended_pipeline;
gboolean is_y_inverted;
/* 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;
gboolean size_invalid;
MetaMonitorTransform transform;
int tex_width, tex_height;
int fallback_width, fallback_height;
int dst_width, dst_height;
gint64 prev_invalidation, last_invalidation;
guint fast_updates;
guint remipmap_timeout_id;
gint64 earliest_remipmap;
guint create_mipmaps : 1;
};
G_DEFINE_TYPE_WITH_CODE (MetaShapedTexture, meta_shaped_texture, CLUTTER_TYPE_ACTOR,
G_IMPLEMENT_INTERFACE (META_TYPE_CULLABLE, cullable_iface_init));
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;
signals[SIZE_CHANGED] = g_signal_new ("size-changed",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL, NULL,
G_TYPE_NONE, 0);
}
static void
invalidate_size (MetaShapedTexture *stex)
{
stex->size_invalid = TRUE;
}
static void
meta_shaped_texture_init (MetaShapedTexture *stex)
{
stex->paint_tower = meta_texture_tower_new ();
stex->texture = NULL;
stex->mask_texture = NULL;
stex->create_mipmaps = TRUE;
stex->is_y_inverted = TRUE;
stex->transform = META_MONITOR_TRANSFORM_NORMAL;
g_signal_connect (stex,
"notify::scale-x",
G_CALLBACK (invalidate_size),
stex);
}
static void
update_size (MetaShapedTexture *stex)
{
int dst_width;
int dst_height;
if (meta_monitor_transform_is_rotated (stex->transform))
{
if (stex->texture)
{
dst_width = stex->tex_height;
dst_height = stex->tex_width;
}
else
{
dst_width = stex->fallback_height;
dst_height = stex->fallback_width;
}
}
else
{
if (stex->texture)
{
dst_width = stex->tex_width;
dst_height = stex->tex_height;
}
else
{
dst_width = stex->fallback_width;
dst_height = stex->fallback_height;
}
}
stex->size_invalid = FALSE;
if (stex->dst_width != dst_width ||
stex->dst_height != dst_height)
{
stex->dst_width = dst_width;
stex->dst_height = dst_height;
meta_shaped_texture_set_mask_texture (stex, NULL);
clutter_actor_queue_relayout (CLUTTER_ACTOR (stex));
g_signal_emit (stex, signals[SIZE_CHANGED], 0);
}
}
static void
ensure_size_valid (MetaShapedTexture *stex)
{
if (stex->size_invalid)
update_size (stex);
}
static void
set_unobscured_region (MetaShapedTexture *stex,
cairo_region_t *unobscured_region)
{
g_clear_pointer (&stex->unobscured_region, cairo_region_destroy);
if (unobscured_region)
{
int width, height;
ensure_size_valid (stex);
width = stex->dst_width;
height = stex->dst_height;
cairo_rectangle_int_t bounds = { 0, 0, width, height };
stex->unobscured_region = cairo_region_copy (unobscured_region);
cairo_region_intersect_rectangle (stex->unobscured_region, &bounds);
}
}
static void
set_clip_region (MetaShapedTexture *stex,
cairo_region_t *clip_region)
{
g_clear_pointer (&stex->clip_region, cairo_region_destroy);
if (clip_region)
stex->clip_region = cairo_region_copy (clip_region);
}
static void
meta_shaped_texture_reset_pipelines (MetaShapedTexture *stex)
{
g_clear_pointer (&stex->base_pipeline, cogl_object_unref);
g_clear_pointer (&stex->masked_pipeline, cogl_object_unref);
g_clear_pointer (&stex->unblended_pipeline, cogl_object_unref);
}
static void
meta_shaped_texture_dispose (GObject *object)
{
MetaShapedTexture *stex = (MetaShapedTexture *) object;
if (stex->remipmap_timeout_id)
{
g_source_remove (stex->remipmap_timeout_id);
stex->remipmap_timeout_id = 0;
}
if (stex->paint_tower)
meta_texture_tower_free (stex->paint_tower);
stex->paint_tower = NULL;
g_clear_pointer (&stex->texture, cogl_object_unref);
g_clear_pointer (&stex->opaque_region, cairo_region_destroy);
meta_shaped_texture_set_mask_texture (stex, NULL);
set_unobscured_region (stex, NULL);
set_clip_region (stex, NULL);
meta_shaped_texture_reset_pipelines (stex);
g_clear_pointer (&stex->snippet, cogl_object_unref);
G_OBJECT_CLASS (meta_shaped_texture_parent_class)->dispose (object);
}
static CoglPipeline *
get_base_pipeline (MetaShapedTexture *stex,
CoglContext *ctx)
{
CoglPipeline *pipeline;
if (stex->base_pipeline)
return stex->base_pipeline;
pipeline = cogl_pipeline_new (ctx);
cogl_pipeline_set_layer_wrap_mode_s (pipeline, 0,
COGL_PIPELINE_WRAP_MODE_CLAMP_TO_EDGE);
cogl_pipeline_set_layer_wrap_mode_t (pipeline, 0,
COGL_PIPELINE_WRAP_MODE_CLAMP_TO_EDGE);
cogl_pipeline_set_layer_wrap_mode_s (pipeline, 1,
COGL_PIPELINE_WRAP_MODE_CLAMP_TO_EDGE);
cogl_pipeline_set_layer_wrap_mode_t (pipeline, 1,
COGL_PIPELINE_WRAP_MODE_CLAMP_TO_EDGE);
if (!stex->is_y_inverted)
{
CoglMatrix matrix;
cogl_matrix_init_identity (&matrix);
cogl_matrix_scale (&matrix, 1, -1, 1);
cogl_matrix_translate (&matrix, 0, -1, 0);
cogl_pipeline_set_layer_matrix (pipeline, 0, &matrix);
}
if (stex->transform != META_MONITOR_TRANSFORM_NORMAL)
{
CoglMatrix matrix;
CoglEuler euler;
cogl_matrix_init_translation (&matrix, 0.5, 0.5, 0.0);
switch (stex->transform)
{
case META_MONITOR_TRANSFORM_90:
cogl_euler_init (&euler, 0.0, 0.0, 90.0);
break;
case META_MONITOR_TRANSFORM_180:
cogl_euler_init (&euler, 0.0, 0.0, 180.0);
break;
case META_MONITOR_TRANSFORM_270:
cogl_euler_init (&euler, 0.0, 0.0, 270.0);
break;
case META_MONITOR_TRANSFORM_FLIPPED:
cogl_euler_init (&euler, 180.0, 0.0, 0.0);
break;
case META_MONITOR_TRANSFORM_FLIPPED_90:
cogl_euler_init (&euler, 0.0, 180.0, 90.0);
break;
case META_MONITOR_TRANSFORM_FLIPPED_180:
cogl_euler_init (&euler, 180.0, 0.0, 180.0);
break;
case META_MONITOR_TRANSFORM_FLIPPED_270:
cogl_euler_init (&euler, 0.0, 180.0, 270.0);
break;
case META_MONITOR_TRANSFORM_NORMAL:
g_assert_not_reached ();
}
cogl_matrix_rotate_euler (&matrix, &euler);
cogl_matrix_translate (&matrix, -0.5, -0.5, 0.0);
cogl_pipeline_set_layer_matrix (pipeline, 0, &matrix);
cogl_pipeline_set_layer_matrix (pipeline, 1, &matrix);
}
if (stex->snippet)
cogl_pipeline_add_layer_snippet (pipeline, 0, stex->snippet);
stex->base_pipeline = pipeline;
return stex->base_pipeline;
}
static CoglPipeline *
get_unmasked_pipeline (MetaShapedTexture *stex,
CoglContext *ctx)
{
return get_base_pipeline (stex, ctx);
}
static CoglPipeline *
get_masked_pipeline (MetaShapedTexture *stex,
CoglContext *ctx)
{
CoglPipeline *pipeline;
if (stex->masked_pipeline)
return stex->masked_pipeline;
pipeline = cogl_pipeline_copy (get_base_pipeline (stex, ctx));
cogl_pipeline_set_layer_combine (pipeline, 1,
"RGBA = MODULATE (PREVIOUS, TEXTURE[A])",
NULL);
stex->masked_pipeline = pipeline;
return pipeline;
}
static CoglPipeline *
get_unblended_pipeline (MetaShapedTexture *stex,
CoglContext *ctx)
{
CoglPipeline *pipeline;
CoglColor color;
if (stex->unblended_pipeline)
return stex->unblended_pipeline;
pipeline = cogl_pipeline_copy (get_base_pipeline (stex, ctx));
cogl_color_init_from_4ub (&color, 255, 255, 255, 255);
cogl_pipeline_set_blend (pipeline,
"RGBA = ADD (SRC_COLOR, 0)",
NULL);
cogl_pipeline_set_color (pipeline, &color);
stex->unblended_pipeline = pipeline;
return pipeline;
}
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)
{
int width, height;
g_return_if_fail (META_IS_SHAPED_TEXTURE (stex));
if (stex->texture)
cogl_object_unref (stex->texture);
stex->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));
}
else
{
width = 0;
height = 0;
}
if (stex->tex_width != width ||
stex->tex_height != height)
{
stex->tex_width = width;
stex->tex_height = height;
update_size (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 (stex->create_mipmaps)
meta_texture_tower_set_base_texture (stex->paint_tower, cogl_tex);
}
static gboolean
texture_is_idle_and_not_mipmapped (gpointer user_data)
{
MetaShapedTexture *stex = META_SHAPED_TEXTURE (user_data);
if ((g_get_monotonic_time () - stex->earliest_remipmap) < 0)
return G_SOURCE_CONTINUE;
clutter_actor_queue_redraw (CLUTTER_ACTOR (stex));
stex->remipmap_timeout_id = 0;
return G_SOURCE_REMOVE;
}
static void
do_paint (MetaShapedTexture *stex,
CoglFramebuffer *fb,
CoglTexture *paint_tex,
cairo_region_t *clip_region)
{
double tex_scale;
int dst_width, dst_height;
cairo_rectangle_int_t tex_rect;
guchar opacity;
gboolean use_opaque_region;
cairo_region_t *clip_tex_region;
cairo_region_t *opaque_tex_region;
cairo_region_t *blended_tex_region;
CoglContext *ctx;
ClutterActorBox alloc;
CoglPipelineFilter filter;
clutter_actor_get_scale (CLUTTER_ACTOR (stex), &tex_scale, NULL);
ensure_size_valid (stex);
dst_width = stex->dst_width;
dst_height = stex->dst_height;
if (dst_width == 0 || dst_height == 0) /* no contents yet */
return;
tex_rect = (cairo_rectangle_int_t) { 0, 0, dst_width, dst_height };
/* Use nearest-pixel interpolation if the texture is unscaled. This
* improves performance, especially with software rendering.
*/
filter = COGL_PIPELINE_FILTER_LINEAR;
if (meta_actor_painting_untransformed (fb,
dst_width, dst_height,
NULL, NULL))
filter = COGL_PIPELINE_FILTER_NEAREST;
ctx = clutter_backend_get_cogl_context (clutter_get_default_backend ());
opacity = clutter_actor_get_paint_opacity (CLUTTER_ACTOR (stex));
clutter_actor_get_allocation_box (CLUTTER_ACTOR (stex), &alloc);
if (stex->opaque_region && opacity == 255)
{
opaque_tex_region =
meta_region_scale_double (stex->opaque_region,
1.0 / tex_scale,
META_ROUNDING_STRATEGY_SHRINK);
use_opaque_region = TRUE;
}
else
{
opaque_tex_region = NULL;
use_opaque_region = FALSE;
}
if (clip_region)
{
clip_tex_region =
meta_region_scale_double (clip_region,
1.0 / tex_scale,
META_ROUNDING_STRATEGY_GROW);
}
else
{
clip_tex_region = NULL;
}
if (use_opaque_region)
{
if (clip_tex_region)
blended_tex_region = cairo_region_copy (clip_tex_region);
else
blended_tex_region = cairo_region_create_rectangle (&tex_rect);
cairo_region_subtract (blended_tex_region, opaque_tex_region);
}
else
{
if (clip_tex_region)
blended_tex_region = cairo_region_reference (clip_tex_region);
else
blended_tex_region = NULL;
}
/* Limit to how many separate rectangles we'll draw; beyond this just
* fall back and draw the whole thing */
#define MAX_RECTS 16
if (blended_tex_region)
{
int n_rects = cairo_region_num_rectangles (blended_tex_region);
if (n_rects > MAX_RECTS)
{
/* Fall back to taking the fully blended path. */
use_opaque_region = FALSE;
g_clear_pointer (&blended_tex_region, cairo_region_destroy);
}
}
/* First, paint the unblended parts, which are part of the opaque region. */
if (use_opaque_region)
{
CoglPipeline *opaque_pipeline;
cairo_region_t *region;
int n_rects;
int i;
if (clip_tex_region)
{
region = cairo_region_copy (clip_tex_region);
cairo_region_intersect (region, opaque_tex_region);
}
else
{
region = cairo_region_reference (opaque_tex_region);
}
if (!cairo_region_is_empty (region))
{
opaque_pipeline = get_unblended_pipeline (stex, 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);
}
}
cairo_region_destroy (region);
}
/* Now, go ahead and paint the blended parts. */
/* We have three cases:
* 1) blended_tex_region has rectangles - paint the rectangles.
* 2) blended_tex_region is empty - don't paint anything
* 3) blended_tex_region is NULL - paint fully-blended.
*
* 1) and 3) are the times where we have to paint stuff. This tests
* for 1) and 3).
*/
if (!blended_tex_region || !cairo_region_is_empty (blended_tex_region))
{
CoglPipeline *blended_pipeline;
if (stex->mask_texture == NULL)
{
blended_pipeline = get_unmasked_pipeline (stex, ctx);
}
else
{
blended_pipeline = get_masked_pipeline (stex, ctx);
cogl_pipeline_set_layer_texture (blended_pipeline, 1, stex->mask_texture);
cogl_pipeline_set_layer_filters (blended_pipeline, 1, filter, filter);
}
cogl_pipeline_set_layer_texture (blended_pipeline, 0, paint_tex);
cogl_pipeline_set_layer_filters (blended_pipeline, 0, filter, filter);
CoglColor color;
cogl_color_init_from_4ub (&color, opacity, opacity, opacity, opacity);
cogl_pipeline_set_color (blended_pipeline, &color);
if (blended_tex_region)
{
/* 1) blended_tex_region is not empty. Paint the rectangles. */
int i;
int n_rects = cairo_region_num_rectangles (blended_tex_region);
for (i = 0; i < n_rects; i++)
{
cairo_rectangle_int_t rect;
cairo_region_get_rectangle (blended_tex_region, i, &rect);
if (!gdk_rectangle_intersect (&tex_rect, &rect, &rect))
continue;
paint_clipped_rectangle (fb, blended_pipeline, &rect, &alloc);
}
}
else
{
/* 3) blended_tex_region is NULL. Do a full paint. */
cogl_framebuffer_draw_rectangle (fb, blended_pipeline,
0, 0,
alloc.x2 - alloc.x1,
alloc.y2 - alloc.y1);
}
}
g_clear_pointer (&clip_tex_region, cairo_region_destroy);
g_clear_pointer (&opaque_tex_region, cairo_region_destroy);
g_clear_pointer (&blended_tex_region, cairo_region_destroy);
}
static void
meta_shaped_texture_paint (ClutterActor *actor)
{
MetaShapedTexture *stex = META_SHAPED_TEXTURE (actor);
CoglTexture *paint_tex;
CoglFramebuffer *fb;
if (!stex->texture)
return;
if (stex->clip_region && cairo_region_is_empty (stex->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 (stex->create_mipmaps)
{
int64_t now = g_get_monotonic_time ();
int64_t age = now - stex->last_invalidation;
if (age >= MIN_MIPMAP_AGE_USEC ||
stex->fast_updates < MIN_FAST_UPDATES_BEFORE_UNMIPMAP)
{
paint_tex = meta_texture_tower_get_paint_texture (stex->paint_tower);
if (!paint_tex)
paint_tex = stex->texture;
}
else
{
paint_tex = stex->texture;
/* Minus 1000 to ensure we don't fail the age test in timeout */
stex->earliest_remipmap = now + MIN_MIPMAP_AGE_USEC - 1000;
if (!stex->remipmap_timeout_id)
stex->remipmap_timeout_id =
g_timeout_add (MIN_MIPMAP_AGE_USEC / 1000,
texture_is_idle_and_not_mipmapped,
stex);
}
}
else
{
paint_tex = COGL_TEXTURE (stex->texture);
}
if (cogl_texture_get_width (paint_tex) == 0 ||
cogl_texture_get_height (paint_tex) == 0)
return;
fb = cogl_get_draw_framebuffer ();
do_paint (META_SHAPED_TEXTURE (actor), fb, paint_tex, stex->clip_region);
}
static void
meta_shaped_texture_get_preferred_width (ClutterActor *self,
gfloat for_height,
gfloat *min_width_p,
gfloat *natural_width_p)
{
MetaShapedTexture *stex = META_SHAPED_TEXTURE (self);
ensure_size_valid (stex);
if (min_width_p)
*min_width_p = stex->dst_width;
if (natural_width_p)
*natural_width_p = stex->dst_width;
}
static void
meta_shaped_texture_get_preferred_height (ClutterActor *self,
gfloat for_width,
gfloat *min_height_p,
gfloat *natural_height_p)
{
MetaShapedTexture *stex = META_SHAPED_TEXTURE (self);
ensure_size_valid (stex);
if (min_height_p)
*min_height_p = stex->dst_height;
if (natural_height_p)
*natural_height_p = stex->dst_height;
}
static cairo_region_t *
effective_unobscured_region (MetaShapedTexture *stex)
{
ClutterActor *actor;
/* Fail if we have any mapped clones. */
actor = CLUTTER_ACTOR (stex);
do
{
if (clutter_actor_has_mapped_clones (actor))
return NULL;
actor = clutter_actor_get_parent (actor);
}
while (actor != NULL);
return stex->unobscured_region;
}
static gboolean
meta_shaped_texture_get_paint_volume (ClutterActor *actor,
ClutterPaintVolume *volume)
{
return clutter_paint_volume_set_from_allocation (volume, actor);
}
void
meta_shaped_texture_set_create_mipmaps (MetaShapedTexture *stex,
gboolean create_mipmaps)
{
g_return_if_fail (META_IS_SHAPED_TEXTURE (stex));
create_mipmaps = create_mipmaps != FALSE;
if (create_mipmaps != stex->create_mipmaps)
{
CoglTexture *base_texture;
stex->create_mipmaps = create_mipmaps;
base_texture = create_mipmaps ? stex->texture : NULL;
meta_texture_tower_set_base_texture (stex->paint_tower, base_texture);
}
}
void
meta_shaped_texture_set_mask_texture (MetaShapedTexture *stex,
CoglTexture *mask_texture)
{
g_return_if_fail (META_IS_SHAPED_TEXTURE (stex));
g_clear_pointer (&stex->mask_texture, cogl_object_unref);
if (mask_texture != NULL)
{
stex->mask_texture = mask_texture;
cogl_object_ref (stex->mask_texture);
}
clutter_actor_queue_redraw (CLUTTER_ACTOR (stex));
}
gboolean
meta_shaped_texture_is_obscured (MetaShapedTexture *stex)
{
cairo_region_t *unobscured_region = effective_unobscured_region (stex);
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)
{
cairo_region_t *unobscured_region;
const cairo_rectangle_int_t clip = { x, y, width, height };
if (stex->texture == NULL)
return FALSE;
meta_texture_tower_update_area (stex->paint_tower, x, y, width, height);
stex->prev_invalidation = stex->last_invalidation;
stex->last_invalidation = g_get_monotonic_time ();
if (stex->prev_invalidation)
{
gint64 interval = stex->last_invalidation - stex->prev_invalidation;
gboolean fast_update = interval < MIN_MIPMAP_AGE_USEC;
if (!fast_update)
stex->fast_updates = 0;
else if (stex->fast_updates < MIN_FAST_UPDATES_BEFORE_UNMIPMAP)
stex->fast_updates++;
}
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_set_is_y_inverted: (skip)
*/
void
meta_shaped_texture_set_is_y_inverted (MetaShapedTexture *stex,
gboolean is_y_inverted)
{
if (stex->is_y_inverted == is_y_inverted)
return;
meta_shaped_texture_reset_pipelines (stex);
stex->is_y_inverted = is_y_inverted;
}
/**
* meta_shaped_texture_set_snippet: (skip)
*/
void
meta_shaped_texture_set_snippet (MetaShapedTexture *stex,
CoglSnippet *snippet)
{
if (stex->snippet == snippet)
return;
meta_shaped_texture_reset_pipelines (stex);
g_clear_pointer (&stex->snippet, cogl_object_unref);
if (snippet)
stex->snippet = cogl_object_ref (snippet);
}
/**
* 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->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)
{
g_return_if_fail (META_IS_SHAPED_TEXTURE (stex));
if (stex->opaque_region)
cairo_region_destroy (stex->opaque_region);
if (opaque_region)
stex->opaque_region = cairo_region_reference (opaque_region);
else
stex->opaque_region = NULL;
}
cairo_region_t *
meta_shaped_texture_get_opaque_region (MetaShapedTexture *stex)
{
return stex->opaque_region;
}
void
meta_shaped_texture_set_transform (MetaShapedTexture *stex,
MetaMonitorTransform transform)
{
if (stex->transform == transform)
return;
stex->transform = transform;
meta_shaped_texture_reset_pipelines (stex);
invalidate_size (stex);
}
static gboolean
should_get_via_offscreen (MetaShapedTexture *stex)
{
if (!cogl_texture_is_get_data_supported (stex->texture))
return TRUE;
switch (stex->transform)
{
case META_MONITOR_TRANSFORM_90:
case META_MONITOR_TRANSFORM_180:
case META_MONITOR_TRANSFORM_270:
case META_MONITOR_TRANSFORM_FLIPPED:
case META_MONITOR_TRANSFORM_FLIPPED_90:
case META_MONITOR_TRANSFORM_FLIPPED_180:
case META_MONITOR_TRANSFORM_FLIPPED_270:
return TRUE;
case META_MONITOR_TRANSFORM_NORMAL:
break;
}
return FALSE;
}
static cairo_surface_t *
get_image_via_offscreen (MetaShapedTexture *stex,
cairo_rectangle_int_t *clip)
{
ClutterBackend *clutter_backend = clutter_get_default_backend ();
CoglContext *cogl_context =
clutter_backend_get_cogl_context (clutter_backend);
CoglTexture *image_texture;
GError *error = NULL;
CoglOffscreen *offscreen;
CoglFramebuffer *fb;
CoglMatrix projection_matrix;
int fb_width, fb_height;
cairo_rectangle_int_t fallback_clip;
CoglColor clear_color;
cairo_surface_t *surface;
if (cogl_has_feature (cogl_context, COGL_FEATURE_ID_TEXTURE_NPOT))
{
fb_width = stex->dst_width;
fb_height = stex->dst_height;
}
else
{
fb_width = _cogl_util_next_p2 (stex->dst_width);
fb_height = _cogl_util_next_p2 (stex->dst_height);
}
if (!clip)
{
fallback_clip = (cairo_rectangle_int_t) {
.width = stex->dst_width,
.height = stex->dst_height,
};
clip = &fallback_clip;
}
image_texture =
COGL_TEXTURE (cogl_texture_2d_new_with_size (cogl_context,
fb_width, fb_height));
cogl_primitive_texture_set_auto_mipmap (COGL_PRIMITIVE_TEXTURE (image_texture),
FALSE);
if (!cogl_texture_allocate (COGL_TEXTURE (image_texture), &error))
{
g_error_free (error);
cogl_object_unref (image_texture);
return FALSE;
}
if (fb_width != stex->dst_width || fb_height != stex->dst_height)
{
CoglSubTexture *sub_texture;
sub_texture = cogl_sub_texture_new (cogl_context,
image_texture,
0, 0,
stex->dst_width, stex->dst_height);
cogl_object_unref (image_texture);
image_texture = COGL_TEXTURE (sub_texture);
}
offscreen = cogl_offscreen_new_with_texture (COGL_TEXTURE (image_texture));
fb = COGL_FRAMEBUFFER (offscreen);
cogl_object_unref (image_texture);
if (!cogl_framebuffer_allocate (fb, &error))
{
g_error_free (error);
cogl_object_unref (fb);
return FALSE;
}
cogl_framebuffer_push_matrix (fb);
cogl_matrix_init_identity (&projection_matrix);
cogl_matrix_scale (&projection_matrix,
1.0 / (stex->dst_width / 2.0),
-1.0 / (stex->dst_height / 2.0), 0);
cogl_matrix_translate (&projection_matrix,
-(stex->dst_width / 2.0),
-(stex->dst_height / 2.0), 0);
cogl_framebuffer_set_projection_matrix (fb, &projection_matrix);
cogl_color_init_from_4ub (&clear_color, 0, 0, 0, 0);
cogl_framebuffer_clear (fb, COGL_BUFFER_BIT_COLOR, &clear_color);
do_paint (stex, fb, stex->texture, NULL);
cogl_framebuffer_pop_matrix (fb);
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
clip->width, clip->height);
cogl_framebuffer_read_pixels (fb,
clip->x, clip->y,
clip->width, clip->height,
CLUTTER_CAIRO_FORMAT_ARGB32,
cairo_image_surface_get_data (surface));
cogl_object_unref (fb);
cairo_surface_mark_dirty (surface);
return surface;
}
/**
* 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)
{
cairo_rectangle_int_t *transformed_clip = NULL;
CoglTexture *texture, *mask_texture;
cairo_surface_t *surface;
g_return_val_if_fail (META_IS_SHAPED_TEXTURE (stex), NULL);
texture = COGL_TEXTURE (stex->texture);
if (texture == NULL)
return NULL;
ensure_size_valid (stex);
if (stex->dst_width == 0 || stex->dst_height == 0)
return NULL;
if (clip != NULL)
{
double tex_scale;
cairo_rectangle_int_t dst_rect;
transformed_clip = alloca (sizeof (cairo_rectangle_int_t));
clutter_actor_get_scale (CLUTTER_ACTOR (stex), &tex_scale, NULL);
meta_rectangle_scale_double (clip, 1.0 / tex_scale,
META_ROUNDING_STRATEGY_GROW,
transformed_clip);
dst_rect = (cairo_rectangle_int_t) {
.width = stex->dst_width,
.height = stex->dst_height,
};
if (!meta_rectangle_intersect (&dst_rect, transformed_clip,
transformed_clip))
return NULL;
}
if (should_get_via_offscreen (stex))
return get_image_via_offscreen (stex, transformed_clip);
if (transformed_clip)
texture = cogl_texture_new_from_sub_texture (texture,
transformed_clip->x,
transformed_clip->y,
transformed_clip->width,
transformed_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 (transformed_clip)
cogl_object_unref (texture);
mask_texture = stex->mask_texture;
if (mask_texture != NULL)
{
cairo_t *cr;
cairo_surface_t *mask_surface;
if (transformed_clip)
mask_texture =
cogl_texture_new_from_sub_texture (mask_texture,
transformed_clip->x,
transformed_clip->y,
transformed_clip->width,
transformed_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 (transformed_clip)
cogl_object_unref (mask_texture);
}
return surface;
}
void
meta_shaped_texture_set_fallback_size (MetaShapedTexture *stex,
int fallback_width,
int fallback_height)
{
stex->fallback_width = fallback_width;
stex->fallback_height = fallback_height;
invalidate_size (stex);
}
static void
meta_shaped_texture_cull_out (MetaCullable *cullable,
cairo_region_t *unobscured_region,
cairo_region_t *clip_region)
{
MetaShapedTexture *stex = META_SHAPED_TEXTURE (cullable);
set_unobscured_region (stex, unobscured_region);
set_clip_region (stex, clip_region);
if (clutter_actor_get_paint_opacity (CLUTTER_ACTOR (stex)) == 0xff)
{
if (stex->opaque_region)
{
if (unobscured_region)
cairo_region_subtract (unobscured_region, stex->opaque_region);
if (clip_region)
cairo_region_subtract (clip_region, stex->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);
}
Reference in New Issue View Git Blame Copy Permalink