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mutter-performance-source/src/compositor/meta-background-actor.c
Jonas Ådahl 2f4a68c8c3 Clean up include macros mess 
The order and way include macros were structured was chaotic, with no
real common thread between files. Try to tidy up the mess with some
common scheme, to make things look less messy.
2018-11-06 17:17:36 +01:00

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/*
* Copyright 2009 Sander Dijkhuis
* Copyright 2014 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/>.
*
* Portions adapted from gnome-shell/src/shell-global.c
*/
/**
* SECTION:meta-background-actor
* @title: MetaBackgroundActor
* @short_description: Actor for painting the root window background
*
*/
/*
* The overall model drawing model of this widget is that we have one
* texture, or two interpolated textures, possibly with alpha or
* margins that let the underlying background show through, blended
* over a solid color or a gradient. The result of that combination
* can then be affected by a "vignette" that darkens the background
* away from a central point (or as a no-GLSL fallback, simply darkens
* the background) and by overall opacity.
*
* As of GNOME 3.14, GNOME is only using a fraction of this when the
* user sets the background through the control center - what can be
* set is:
*
* A single image without a border
* An animation of images without a border that blend together,
* with the blend changing every 4-5 minutes
* A solid color with a repeated noise texture blended over it
*
* This all is pretty easy to do in a fragment shader, except when:
*
* A) We don't have GLSL - in this case, the operation of
* interpolating the two textures and blending the result over the
* background can't be expressed with Cogl's fixed-function layer
* combining (which is confined to what GL's texture environment
* combining can do) So we can only handle the above directly if
* there are no margins or alpha.
*
* B) The image textures are sliced. Texture size limits on older
* hardware (pre-965 intel hardware, r300, etc.) is often 2048,
* and it would be common to use a texture larger than this for a
* background and expect it to be scaled down. Cogl can compensate
* for this by breaking the texture up into multiple textures, but
* can't multitexture with sliced textures. So we can only handle
* the above if there's a single texture.
*
* However, even when we *can* represent everything in a single pass,
* it's not necessarily efficient. If we want to draw a 1024x768
* background, it's pretty inefficient to bilinearly texture from
* two 2560x1440 images and mix that. So the drawing model we take
* here is that MetaBackground generates a single texture (which
* might be a 1x1 texture for a solid color, or a 1x2 texture for a
* gradient, or a repeated texture for wallpaper, or a pre-rendered
* texture the size of the screen), and we draw with that, possibly
* adding the vignette and opacity.
*/
#include "config.h"
#include "compositor/meta-background-actor-private.h"
#include "clutter/clutter.h"
#include "compositor/clutter-utils.h"
#include "compositor/cogl-utils.h"
#include "compositor/meta-background-private.h"
#include "compositor/meta-cullable.h"
#include "meta/display.h"
#include "meta/meta-x11-errors.h"
enum
{
PROP_META_DISPLAY = 1,
PROP_MONITOR,
PROP_BACKGROUND,
PROP_GRADIENT,
PROP_GRADIENT_HEIGHT,
PROP_GRADIENT_MAX_DARKNESS,
PROP_VIGNETTE,
PROP_VIGNETTE_SHARPNESS,
PROP_VIGNETTE_BRIGHTNESS
};
typedef enum {
CHANGED_BACKGROUND = 1 << 0,
CHANGED_EFFECTS = 1 << 2,
CHANGED_VIGNETTE_PARAMETERS = 1 << 3,
CHANGED_GRADIENT_PARAMETERS = 1 << 4,
CHANGED_ALL = 0xFFFF
} ChangedFlags;
#define GRADIENT_VERTEX_SHADER_DECLARATIONS \
"uniform vec2 scale;\n" \
"varying vec2 position;\n" \
#define GRADIENT_VERTEX_SHADER_CODE \
"position = cogl_tex_coord0_in.xy * scale;\n" \
#define GRADIENT_FRAGMENT_SHADER_DECLARATIONS \
"uniform float gradient_height_perc;\n" \
"uniform float gradient_max_darkness;\n" \
"varying vec2 position;\n" \
#define GRADIENT_FRAGMENT_SHADER_CODE \
"float min_brightness = 1.0 - gradient_max_darkness;\n" \
"float gradient_y_pos = min(position.y, gradient_height_perc) / gradient_height_perc;\n" \
"float pixel_brightness = (1.0 - min_brightness) * gradient_y_pos + min_brightness;\n" \
"cogl_color_out.rgb = cogl_color_out.rgb * pixel_brightness;\n" \
#define VIGNETTE_VERTEX_SHADER_DECLARATIONS \
"uniform vec2 scale;\n" \
"uniform vec2 offset;\n" \
"varying vec2 position;\n" \
#define VIGNETTE_VERTEX_SHADER_CODE \
"position = cogl_tex_coord0_in.xy * scale + offset;\n" \
#define VIGNETTE_FRAGMENT_SHADER_DECLARATIONS \
"uniform float vignette_sharpness;\n" \
"varying vec2 position;\n" \
#define VIGNETTE_FRAGMENT_SHADER_CODE \
"float t = 2.0 * length(position);\n" \
"t = min(t, 1.0);\n" \
"float pixel_brightness = 1.0 - t * vignette_sharpness;\n" \
"cogl_color_out.rgb = cogl_color_out.rgb * pixel_brightness;\n" \
typedef struct _MetaBackgroundLayer MetaBackgroundLayer;
typedef enum {
PIPELINE_VIGNETTE = (1 << 0),
PIPELINE_BLEND = (1 << 1),
PIPELINE_GRADIENT = (1 << 2),
} PipelineFlags;
struct _MetaBackgroundActorPrivate
{
MetaDisplay *display;
int monitor;
MetaBackground *background;
gboolean gradient;
double gradient_max_darkness;
int gradient_height;
gboolean vignette;
double vignette_brightness;
double vignette_sharpness;
ChangedFlags changed;
CoglPipeline *pipeline;
PipelineFlags pipeline_flags;
cairo_rectangle_int_t texture_area;
gboolean force_bilinear;
cairo_region_t *clip_region;
};
static void cullable_iface_init (MetaCullableInterface *iface);
G_DEFINE_TYPE_WITH_CODE (MetaBackgroundActor, meta_background_actor, CLUTTER_TYPE_ACTOR,
G_ADD_PRIVATE (MetaBackgroundActor)
G_IMPLEMENT_INTERFACE (META_TYPE_CULLABLE, cullable_iface_init));
static void
set_clip_region (MetaBackgroundActor *self,
cairo_region_t *clip_region)
{
MetaBackgroundActorPrivate *priv = self->priv;
g_clear_pointer (&priv->clip_region, cairo_region_destroy);
if (clip_region)
priv->clip_region = cairo_region_copy (clip_region);
}
static void
meta_background_actor_dispose (GObject *object)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (object);
MetaBackgroundActorPrivate *priv = self->priv;
set_clip_region (self, NULL);
meta_background_actor_set_background (self, NULL);
if (priv->pipeline)
{
cogl_object_unref (priv->pipeline);
priv->pipeline = NULL;
}
G_OBJECT_CLASS (meta_background_actor_parent_class)->dispose (object);
}
static void
get_preferred_size (MetaBackgroundActor *self,
gfloat *width,
gfloat *height)
{
MetaBackgroundActorPrivate *priv = META_BACKGROUND_ACTOR (self)->priv;
MetaRectangle monitor_geometry;
meta_display_get_monitor_geometry (priv->display,
priv->monitor,
&monitor_geometry);
if (width != NULL)
*width = monitor_geometry.width;
if (height != NULL)
*height = monitor_geometry.height;
}
static void
meta_background_actor_get_preferred_width (ClutterActor *actor,
gfloat for_height,
gfloat *min_width_p,
gfloat *natural_width_p)
{
gfloat width;
get_preferred_size (META_BACKGROUND_ACTOR (actor), &width, NULL);
if (min_width_p)
*min_width_p = width;
if (natural_width_p)
*natural_width_p = width;
}
static void
meta_background_actor_get_preferred_height (ClutterActor *actor,
gfloat for_width,
gfloat *min_height_p,
gfloat *natural_height_p)
{
gfloat height;
get_preferred_size (META_BACKGROUND_ACTOR (actor), NULL, &height);
if (min_height_p)
*min_height_p = height;
if (natural_height_p)
*natural_height_p = height;
}
static CoglPipeline *
make_pipeline (PipelineFlags pipeline_flags)
{
static CoglPipeline *templates[8];
CoglPipeline **templatep;
templatep = &templates[pipeline_flags];
if (*templatep == NULL)
{
/* Cogl automatically caches pipelines with no eviction policy,
* so we need to prevent identical pipelines from getting cached
* separately, by reusing the same shader snippets.
*/
*templatep = COGL_PIPELINE (meta_create_texture_pipeline (NULL));
if ((pipeline_flags & PIPELINE_VIGNETTE) != 0)
{
static CoglSnippet *vignette_vertex_snippet;
static CoglSnippet *vignette_fragment_snippet;
if (!vignette_vertex_snippet)
vignette_vertex_snippet = cogl_snippet_new (COGL_SNIPPET_HOOK_VERTEX,
VIGNETTE_VERTEX_SHADER_DECLARATIONS,
VIGNETTE_VERTEX_SHADER_CODE);
cogl_pipeline_add_snippet (*templatep, vignette_vertex_snippet);
if (!vignette_fragment_snippet)
vignette_fragment_snippet = cogl_snippet_new (COGL_SNIPPET_HOOK_FRAGMENT,
VIGNETTE_FRAGMENT_SHADER_DECLARATIONS,
VIGNETTE_FRAGMENT_SHADER_CODE);
cogl_pipeline_add_snippet (*templatep, vignette_fragment_snippet);
}
if ((pipeline_flags & PIPELINE_GRADIENT) != 0)
{
static CoglSnippet *gradient_vertex_snippet;
static CoglSnippet *gradient_fragment_snippet;
if (!gradient_vertex_snippet)
gradient_vertex_snippet = cogl_snippet_new (COGL_SNIPPET_HOOK_VERTEX,
GRADIENT_VERTEX_SHADER_DECLARATIONS,
GRADIENT_VERTEX_SHADER_CODE);
cogl_pipeline_add_snippet (*templatep, gradient_vertex_snippet);
if (!gradient_fragment_snippet)
gradient_fragment_snippet = cogl_snippet_new (COGL_SNIPPET_HOOK_FRAGMENT,
GRADIENT_FRAGMENT_SHADER_DECLARATIONS,
GRADIENT_FRAGMENT_SHADER_CODE);
cogl_pipeline_add_snippet (*templatep, gradient_fragment_snippet);
}
if ((pipeline_flags & PIPELINE_BLEND) == 0)
cogl_pipeline_set_blend (*templatep, "RGBA = ADD (SRC_COLOR, 0)", NULL);
}
return cogl_pipeline_copy (*templatep);
}
static void
setup_pipeline (MetaBackgroundActor *self,
cairo_rectangle_int_t *actor_pixel_rect)
{
MetaBackgroundActorPrivate *priv = self->priv;
PipelineFlags pipeline_flags = 0;
guint8 opacity;
float color_component;
CoglPipelineFilter filter;
opacity = clutter_actor_get_paint_opacity (CLUTTER_ACTOR (self));
if (opacity < 255)
pipeline_flags |= PIPELINE_BLEND;
if (priv->vignette && clutter_feature_available (CLUTTER_FEATURE_SHADERS_GLSL))
pipeline_flags |= PIPELINE_VIGNETTE;
if (priv->gradient && clutter_feature_available (CLUTTER_FEATURE_SHADERS_GLSL))
pipeline_flags |= PIPELINE_GRADIENT;
if (priv->pipeline &&
pipeline_flags != priv->pipeline_flags)
{
cogl_object_unref (priv->pipeline);
priv->pipeline = NULL;
}
if (priv->pipeline == NULL)
{
priv->pipeline_flags = pipeline_flags;
priv->pipeline = make_pipeline (pipeline_flags);
priv->changed = CHANGED_ALL;
}
if ((priv->changed & CHANGED_BACKGROUND) != 0)
{
CoglPipelineWrapMode wrap_mode;
CoglTexture *texture = meta_background_get_texture (priv->background,
priv->monitor,
&priv->texture_area,
&wrap_mode);
priv->force_bilinear = texture &&
(priv->texture_area.width != (int)cogl_texture_get_width (texture) ||
priv->texture_area.height != (int)cogl_texture_get_height (texture));
cogl_pipeline_set_layer_texture (priv->pipeline, 0, texture);
cogl_pipeline_set_layer_wrap_mode (priv->pipeline, 0, wrap_mode);
priv->changed &= ~CHANGED_BACKGROUND;
}
if ((priv->changed & CHANGED_VIGNETTE_PARAMETERS) != 0)
{
cogl_pipeline_set_uniform_1f (priv->pipeline,
cogl_pipeline_get_uniform_location (priv->pipeline,
"vignette_sharpness"),
priv->vignette_sharpness);
priv->changed &= ~CHANGED_VIGNETTE_PARAMETERS;
}
if ((priv->changed & CHANGED_GRADIENT_PARAMETERS) != 0)
{
MetaRectangle monitor_geometry;
float gradient_height_perc;
meta_display_get_monitor_geometry (priv->display,
priv->monitor, &monitor_geometry);
gradient_height_perc = MAX (0.0001, priv->gradient_height / (float)monitor_geometry.height);
cogl_pipeline_set_uniform_1f (priv->pipeline,
cogl_pipeline_get_uniform_location (priv->pipeline,
"gradient_height_perc"),
gradient_height_perc);
cogl_pipeline_set_uniform_1f (priv->pipeline,
cogl_pipeline_get_uniform_location (priv->pipeline,
"gradient_max_darkness"),
priv->gradient_max_darkness);
priv->changed &= ~CHANGED_GRADIENT_PARAMETERS;
}
if (priv->vignette)
{
color_component = priv->vignette_brightness * opacity / 255.;
if (!clutter_feature_available (CLUTTER_FEATURE_SHADERS_GLSL))
{
/* Darken everything to match the average brightness that would
* be there if we were drawing the vignette, which is
* (1 - (pi/12.) * vignette_sharpness) [exercise for the reader :]
*/
color_component *= (1 - 0.74 * priv->vignette_sharpness);
}
}
else
color_component = opacity / 255.;
cogl_pipeline_set_color4f (priv->pipeline,
color_component,
color_component,
color_component,
opacity / 255.);
if (!priv->force_bilinear &&
meta_actor_painting_untransformed (actor_pixel_rect->width, actor_pixel_rect->height, NULL, NULL))
filter = COGL_PIPELINE_FILTER_NEAREST;
else
filter = COGL_PIPELINE_FILTER_LINEAR;
cogl_pipeline_set_layer_filters (priv->pipeline, 0, filter, filter);
}
static void
set_glsl_parameters (MetaBackgroundActor *self,
cairo_rectangle_int_t *actor_pixel_rect)
{
MetaBackgroundActorPrivate *priv = self->priv;
float scale[2];
float offset[2];
/* Compute a scale and offset for transforming texture coordinates to the
* coordinate system from [-0.5 to 0.5] across the area of the actor
*/
scale[0] = priv->texture_area.width / (float)actor_pixel_rect->width;
scale[1] = priv->texture_area.height / (float)actor_pixel_rect->height;
offset[0] = priv->texture_area.x / (float)actor_pixel_rect->width - 0.5;
offset[1] = priv->texture_area.y / (float)actor_pixel_rect->height - 0.5;
cogl_pipeline_set_uniform_float (priv->pipeline,
cogl_pipeline_get_uniform_location (priv->pipeline,
"scale"),
2, 1, scale);
cogl_pipeline_set_uniform_float (priv->pipeline,
cogl_pipeline_get_uniform_location (priv->pipeline,
"offset"),
2, 1, offset);
}
static void
paint_clipped_rectangle (CoglFramebuffer *fb,
CoglPipeline *pipeline,
cairo_rectangle_int_t *rect,
cairo_rectangle_int_t *texture_area)
{
float x1, y1, x2, y2;
float tx1, ty1, tx2, ty2;
x1 = rect->x;
y1 = rect->y;
x2 = rect->x + rect->width;
y2 = rect->y + rect->height;
tx1 = (x1 - texture_area->x) / texture_area->width;
ty1 = (y1 - texture_area->y) / texture_area->height;
tx2 = (x2 - texture_area->x) / texture_area->width;
ty2 = (y2 - texture_area->y) / texture_area->height;
cogl_framebuffer_draw_textured_rectangle (fb, pipeline,
x1, y1, x2, y2,
tx1, ty1, tx2, ty2);
}
static gboolean
meta_background_actor_get_paint_volume (ClutterActor *actor,
ClutterPaintVolume *volume)
{
return clutter_paint_volume_set_from_allocation (volume, actor);
}
static void
meta_background_actor_paint (ClutterActor *actor)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (actor);
MetaBackgroundActorPrivate *priv = self->priv;
ClutterActorBox actor_box;
cairo_rectangle_int_t actor_pixel_rect;
CoglFramebuffer *fb;
int i;
if ((priv->clip_region && cairo_region_is_empty (priv->clip_region)))
return;
clutter_actor_get_content_box (actor, &actor_box);
actor_pixel_rect.x = actor_box.x1;
actor_pixel_rect.y = actor_box.y1;
actor_pixel_rect.width = actor_box.x2 - actor_box.x1;
actor_pixel_rect.height = actor_box.y2 - actor_box.y1;
setup_pipeline (self, &actor_pixel_rect);
set_glsl_parameters (self, &actor_pixel_rect);
/* Limit to how many separate rectangles we'll draw; beyond this just
* fall back and draw the whole thing */
#define MAX_RECTS 64
fb = cogl_get_draw_framebuffer ();
/* Now figure out what to actually paint.
*/
if (priv->clip_region != NULL)
{
int n_rects = cairo_region_num_rectangles (priv->clip_region);
if (n_rects <= MAX_RECTS)
{
for (i = 0; i < n_rects; i++)
{
cairo_rectangle_int_t rect;
cairo_region_get_rectangle (priv->clip_region, i, &rect);
if (!gdk_rectangle_intersect (&actor_pixel_rect, &rect, &rect))
continue;
paint_clipped_rectangle (fb, priv->pipeline, &rect, &priv->texture_area);
}
return;
}
}
paint_clipped_rectangle (fb, priv->pipeline, &actor_pixel_rect, &priv->texture_area);
}
static void
meta_background_actor_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (object);
MetaBackgroundActorPrivate *priv = self->priv;
switch (prop_id)
{
case PROP_META_DISPLAY:
priv->display = g_value_get_object (value);
break;
case PROP_MONITOR:
meta_background_actor_set_monitor (self, g_value_get_int (value));
break;
case PROP_BACKGROUND:
meta_background_actor_set_background (self, g_value_get_object (value));
break;
case PROP_GRADIENT:
meta_background_actor_set_gradient (self,
g_value_get_boolean (value),
priv->gradient_height,
priv->gradient_max_darkness);
break;
case PROP_GRADIENT_HEIGHT:
meta_background_actor_set_gradient (self,
priv->gradient,
g_value_get_int (value),
priv->gradient_max_darkness);
break;
case PROP_GRADIENT_MAX_DARKNESS:
meta_background_actor_set_gradient (self,
priv->gradient,
priv->gradient_height,
g_value_get_double (value));
break;
case PROP_VIGNETTE:
meta_background_actor_set_vignette (self,
g_value_get_boolean (value),
priv->vignette_brightness,
priv->vignette_sharpness);
break;
case PROP_VIGNETTE_SHARPNESS:
meta_background_actor_set_vignette (self,
priv->vignette,
priv->vignette_brightness,
g_value_get_double (value));
break;
case PROP_VIGNETTE_BRIGHTNESS:
meta_background_actor_set_vignette (self,
priv->vignette,
g_value_get_double (value),
priv->vignette_sharpness);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
meta_background_actor_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
MetaBackgroundActorPrivate *priv = META_BACKGROUND_ACTOR (object)->priv;
switch (prop_id)
{
case PROP_META_DISPLAY:
g_value_set_object (value, priv->display);
break;
case PROP_MONITOR:
g_value_set_int (value, priv->monitor);
break;
case PROP_BACKGROUND:
g_value_set_object (value, priv->background);
break;
case PROP_GRADIENT:
g_value_set_boolean (value, priv->gradient);
break;
case PROP_GRADIENT_HEIGHT:
g_value_set_int (value, priv->gradient_height);
break;
case PROP_GRADIENT_MAX_DARKNESS:
g_value_set_double (value, priv->gradient_max_darkness);
break;
case PROP_VIGNETTE:
g_value_set_boolean (value, priv->vignette);
break;
case PROP_VIGNETTE_BRIGHTNESS:
g_value_set_double (value, priv->vignette_brightness);
break;
case PROP_VIGNETTE_SHARPNESS:
g_value_set_double (value, priv->vignette_sharpness);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
meta_background_actor_class_init (MetaBackgroundActorClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
GParamSpec *param_spec;
object_class->dispose = meta_background_actor_dispose;
object_class->set_property = meta_background_actor_set_property;
object_class->get_property = meta_background_actor_get_property;
actor_class->get_preferred_width = meta_background_actor_get_preferred_width;
actor_class->get_preferred_height = meta_background_actor_get_preferred_height;
actor_class->get_paint_volume = meta_background_actor_get_paint_volume;
actor_class->paint = meta_background_actor_paint;
param_spec = g_param_spec_object ("meta-display",
"MetaDisplay",
"MetaDisplay",
META_TYPE_DISPLAY,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
g_object_class_install_property (object_class,
PROP_META_DISPLAY,
param_spec);
param_spec = g_param_spec_int ("monitor",
"monitor",
"monitor",
0, G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
g_object_class_install_property (object_class,
PROP_MONITOR,
param_spec);
param_spec = g_param_spec_object ("background",
"Background",
"MetaBackground object holding background parameters",
META_TYPE_BACKGROUND,
G_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_BACKGROUND,
param_spec);
param_spec = g_param_spec_boolean ("gradient",
"Gradient",
"Whether gradient effect is enabled",
FALSE,
G_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_GRADIENT,
param_spec);
param_spec = g_param_spec_int ("gradient-height",
"Gradient Height",
"Height of gradient effect",
0, G_MAXINT, 0,
G_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_GRADIENT_HEIGHT,
param_spec);
param_spec = g_param_spec_double ("gradient-max-darkness",
"Gradient Max Darkness",
"How dark is the gradient initially",
0.0, 1.0, 0.0,
G_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_GRADIENT_MAX_DARKNESS,
param_spec);
param_spec = g_param_spec_boolean ("vignette",
"Vignette",
"Whether vignette effect is enabled",
FALSE,
G_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_VIGNETTE,
param_spec);
param_spec = g_param_spec_double ("brightness",
"Vignette Brightness",
"Brightness of vignette effect",
0.0, 1.0, 1.0,
G_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_VIGNETTE_BRIGHTNESS,
param_spec);
param_spec = g_param_spec_double ("vignette-sharpness",
"Vignette Sharpness",
"Sharpness of vignette effect",
0.0, G_MAXDOUBLE, 0.0,
G_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_VIGNETTE_SHARPNESS,
param_spec);
}
static void
meta_background_actor_init (MetaBackgroundActor *self)
{
MetaBackgroundActorPrivate *priv;
priv = self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
META_TYPE_BACKGROUND_ACTOR,
MetaBackgroundActorPrivate);
priv->gradient = FALSE;
priv->gradient_height = 0;
priv->gradient_max_darkness = 0.0;
priv->vignette = FALSE;
priv->vignette_brightness = 1.0;
priv->vignette_sharpness = 0.0;
}
/**
* meta_background_actor_new:
* @monitor: Index of the monitor for which to draw the background
*
* Creates a new actor to draw the background for the given monitor.
*
* Return value: the newly created background actor
*/
ClutterActor *
meta_background_actor_new (MetaDisplay *display,
int monitor)
{
MetaBackgroundActor *self;
self = g_object_new (META_TYPE_BACKGROUND_ACTOR,
"meta-display", display,
"monitor", monitor,
NULL);
return CLUTTER_ACTOR (self);
}
static void
meta_background_actor_cull_out (MetaCullable *cullable,
cairo_region_t *unobscured_region,
cairo_region_t *clip_region)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (cullable);
set_clip_region (self, clip_region);
}
static void
meta_background_actor_reset_culling (MetaCullable *cullable)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (cullable);
set_clip_region (self, NULL);
}
static void
cullable_iface_init (MetaCullableInterface *iface)
{
iface->cull_out = meta_background_actor_cull_out;
iface->reset_culling = meta_background_actor_reset_culling;
}
/**
* meta_background_actor_get_clip_region:
* @self: a #MetaBackgroundActor
*
* Return value (transfer none): a #cairo_region_t that represents the part of
* the background not obscured by other #MetaBackgroundActor or
* #MetaWindowActor objects.
*/
cairo_region_t *
meta_background_actor_get_clip_region (MetaBackgroundActor *self)
{
MetaBackgroundActorPrivate *priv = self->priv;
return priv->clip_region;
}
static void
invalidate_pipeline (MetaBackgroundActor *self,
ChangedFlags changed)
{
MetaBackgroundActorPrivate *priv = self->priv;
priv->changed |= changed;
}
static void
on_background_changed (MetaBackground *background,
MetaBackgroundActor *self)
{
invalidate_pipeline (self, CHANGED_BACKGROUND);
clutter_actor_queue_redraw (CLUTTER_ACTOR (self));
}
void
meta_background_actor_set_background (MetaBackgroundActor *self,
MetaBackground *background)
{
MetaBackgroundActorPrivate *priv;
g_return_if_fail (META_IS_BACKGROUND_ACTOR (self));
g_return_if_fail (background == NULL || META_IS_BACKGROUND (background));
priv = self->priv;
if (background == priv->background)
return;
if (priv->background)
{
g_signal_handlers_disconnect_by_func (priv->background,
(gpointer)on_background_changed,
self);
g_object_unref (priv->background);
priv->background = NULL;
}
if (background)
{
priv->background = g_object_ref (background);
g_signal_connect (priv->background, "changed",
G_CALLBACK (on_background_changed), self);
}
invalidate_pipeline (self, CHANGED_BACKGROUND);
clutter_actor_queue_redraw (CLUTTER_ACTOR (self));
}
void
meta_background_actor_set_gradient (MetaBackgroundActor *self,
gboolean enabled,
int height,
double max_darkness)
{
MetaBackgroundActorPrivate *priv;
gboolean changed = FALSE;
g_return_if_fail (META_IS_BACKGROUND_ACTOR (self));
g_return_if_fail (height >= 0);
g_return_if_fail (max_darkness >= 0. && max_darkness <= 1.);
priv = self->priv;
enabled = enabled != FALSE && height != 0;
if (enabled != priv->gradient)
{
priv->gradient = enabled;
invalidate_pipeline (self, CHANGED_EFFECTS);
changed = TRUE;
}
if (height != priv->gradient_height || max_darkness != priv->gradient_max_darkness)
{
priv->gradient_height = height;
priv->gradient_max_darkness = max_darkness;
invalidate_pipeline (self, CHANGED_GRADIENT_PARAMETERS);
changed = TRUE;
}
if (changed)
clutter_actor_queue_redraw (CLUTTER_ACTOR (self));
}
void
meta_background_actor_set_monitor (MetaBackgroundActor *self,
int monitor)
{
MetaBackgroundActorPrivate *priv = self->priv;
MetaRectangle old_monitor_geometry;
MetaRectangle new_monitor_geometry;
MetaDisplay *display = priv->display;
if(priv->monitor == monitor)
return;
meta_display_get_monitor_geometry (display, priv->monitor, &old_monitor_geometry);
meta_display_get_monitor_geometry (display, monitor, &new_monitor_geometry);
if(old_monitor_geometry.height != new_monitor_geometry.height)
invalidate_pipeline (self, CHANGED_GRADIENT_PARAMETERS);
priv->monitor = monitor;
}
void
meta_background_actor_set_vignette (MetaBackgroundActor *self,
gboolean enabled,
double brightness,
double sharpness)
{
MetaBackgroundActorPrivate *priv;
gboolean changed = FALSE;
g_return_if_fail (META_IS_BACKGROUND_ACTOR (self));
g_return_if_fail (brightness >= 0. && brightness <= 1.);
g_return_if_fail (sharpness >= 0.);
priv = self->priv;
enabled = enabled != FALSE;
if (enabled != priv->vignette)
{
priv->vignette = enabled;
invalidate_pipeline (self, CHANGED_EFFECTS);
changed = TRUE;
}
if (brightness != priv->vignette_brightness || sharpness != priv->vignette_sharpness)
{
priv->vignette_brightness = brightness;
priv->vignette_sharpness = sharpness;
invalidate_pipeline (self, CHANGED_VIGNETTE_PARAMETERS);
changed = TRUE;
}
if (changed)
clutter_actor_queue_redraw (CLUTTER_ACTOR (self));
}
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