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background-actor: Use MetaBackgroundContent

Browse Source 
MetaBackgroundActor is still necessary for culling purposes,
but now the actual rendering of the background is delegated
to MetaBackgroundContent, as well as the sizing information.

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1302
This commit is contained in:
Georges Basile Stavracas Neto 2020-06-08 22:02:34 -03:00
parent a1b3d1a2a7
commit 6bd382ad23
3 changed files with 35 additions and 843 deletions
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846
src/compositor/meta-background-actor.c
View File

@ -19,142 +19,19 @@
* 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 "compositor/meta-background-content-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_SQRT_2 "1.4142"
#define VIGNETTE_FRAGMENT_SHADER_DECLARATIONS \
"uniform float vignette_sharpness;\n" \
"varying vec2 position;\n" \
"float rand(vec2 p) { return fract(sin(dot(p, vec2(12.9898, 78.233))) * 43758.5453123); }\n" \
#define VIGNETTE_FRAGMENT_SHADER_CODE \
"float t = " VIGNETTE_SQRT_2 " * 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" \
"cogl_color_out.rgb += (rand(position) - 0.5) / 255.0;\n" \
typedef struct _MetaBackgroundLayer MetaBackgroundLayer;
typedef enum
{
PIPELINE_VIGNETTE = (1 << 0),
PIPELINE_BLEND = (1 << 1),
PIPELINE_GRADIENT = (1 << 2),
} PipelineFlags;
struct _MetaBackgroundActor
{
ClutterActor parent;
@ -162,24 +39,7 @@ struct _MetaBackgroundActor
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;
cairo_region_t *unobscured_region;
MetaBackgroundContent *content;
};
static void cullable_iface_init (MetaCullableInterface *iface);
@ -188,407 +48,16 @@ G_DEFINE_TYPE_WITH_CODE (MetaBackgroundActor, meta_background_actor, CLUTTER_TYP
G_IMPLEMENT_INTERFACE (META_TYPE_CULLABLE, cullable_iface_init));
static void
set_clip_region (MetaBackgroundActor *self,
cairo_region_t *clip_region)
maybe_create_content (MetaBackgroundActor *self)
{
g_clear_pointer (&self->clip_region, cairo_region_destroy);
if (clip_region)
{
if (cairo_region_is_empty (clip_region))
self->clip_region = cairo_region_reference (clip_region);
else
self->clip_region = cairo_region_copy (clip_region);
}
}
g_autoptr (ClutterContent) content = NULL;
static void
set_unobscured_region (MetaBackgroundActor *self,
cairo_region_t *unobscured_region)
{
g_clear_pointer (&self->unobscured_region, cairo_region_destroy);
if (unobscured_region)
{
if (cairo_region_is_empty (unobscured_region))
self->unobscured_region = cairo_region_reference (unobscured_region);
else
self->unobscured_region = cairo_region_copy (unobscured_region);
}
}
static void
meta_background_actor_dispose (GObject *object)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (object);
set_clip_region (self, NULL);
set_unobscured_region (self, NULL);
meta_background_actor_set_background (self, NULL);
if (self->pipeline)
{
cogl_object_unref (self->pipeline);
self->pipeline = NULL;
}
G_OBJECT_CLASS (meta_background_actor_parent_class)->dispose (object);
}
static void
get_preferred_size (MetaBackgroundActor *self,
gfloat *width,
gfloat *height)
{
MetaRectangle monitor_geometry;
meta_display_get_monitor_geometry (self->display,
self->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,
ClutterPaintContext *paint_context,
cairo_rectangle_int_t *actor_pixel_rect)
{
PipelineFlags pipeline_flags = 0;
guint8 opacity;
float color_component;
CoglFramebuffer *fb;
CoglPipelineFilter filter;
opacity = clutter_actor_get_paint_opacity (CLUTTER_ACTOR (self));
if (opacity < 255)
pipeline_flags |= PIPELINE_BLEND;
if (self->vignette && clutter_feature_available (CLUTTER_FEATURE_SHADERS_GLSL))
pipeline_flags |= PIPELINE_VIGNETTE;
if (self->gradient && clutter_feature_available (CLUTTER_FEATURE_SHADERS_GLSL))
pipeline_flags |= PIPELINE_GRADIENT;
if (self->pipeline &&
pipeline_flags != self->pipeline_flags)
{
cogl_object_unref (self->pipeline);
self->pipeline = NULL;
}
if (self->pipeline == NULL)
{
self->pipeline_flags = pipeline_flags;
self->pipeline = make_pipeline (pipeline_flags);
self->changed = CHANGED_ALL;
}
if ((self->changed & CHANGED_BACKGROUND) != 0)
{
CoglPipelineWrapMode wrap_mode;
CoglTexture *texture = meta_background_get_texture (self->background,
self->monitor,
&self->texture_area,
&wrap_mode);
self->force_bilinear = texture &&
(self->texture_area.width != (int)cogl_texture_get_width (texture) ||
self->texture_area.height != (int)cogl_texture_get_height (texture));
cogl_pipeline_set_layer_texture (self->pipeline, 0, texture);
cogl_pipeline_set_layer_wrap_mode (self->pipeline, 0, wrap_mode);
self->changed &= ~CHANGED_BACKGROUND;
}
if ((self->changed & CHANGED_VIGNETTE_PARAMETERS) != 0)
{
cogl_pipeline_set_uniform_1f (self->pipeline,
cogl_pipeline_get_uniform_location (self->pipeline,
"vignette_sharpness"),
self->vignette_sharpness);
self->changed &= ~CHANGED_VIGNETTE_PARAMETERS;
}
if ((self->changed & CHANGED_GRADIENT_PARAMETERS) != 0)
{
MetaRectangle monitor_geometry;
float gradient_height_perc;
meta_display_get_monitor_geometry (self->display,
self->monitor, &monitor_geometry);
gradient_height_perc = MAX (0.0001, self->gradient_height / (float)monitor_geometry.height);
cogl_pipeline_set_uniform_1f (self->pipeline,
cogl_pipeline_get_uniform_location (self->pipeline,
"gradient_height_perc"),
gradient_height_perc);
cogl_pipeline_set_uniform_1f (self->pipeline,
cogl_pipeline_get_uniform_location (self->pipeline,
"gradient_max_darkness"),
self->gradient_max_darkness);
self->changed &= ~CHANGED_GRADIENT_PARAMETERS;
}
if (self->vignette)
{
color_component = self->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 * self->vignette_sharpness);
}
}
else
color_component = opacity / 255.;
cogl_pipeline_set_color4f (self->pipeline,
color_component,
color_component,
color_component,
opacity / 255.);
fb = clutter_paint_context_get_framebuffer (paint_context);
if (!self->force_bilinear &&
meta_actor_painting_untransformed (fb,
actor_pixel_rect->width,
actor_pixel_rect->height,
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 (self->pipeline, 0, filter, filter);
}
static void
set_glsl_parameters (MetaBackgroundActor *self,
cairo_rectangle_int_t *actor_pixel_rect)
{
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] = self->texture_area.width / (float)actor_pixel_rect->width;
scale[1] = self->texture_area.height / (float)actor_pixel_rect->height;
offset[0] = self->texture_area.x / (float)actor_pixel_rect->width - 0.5;
offset[1] = self->texture_area.y / (float)actor_pixel_rect->height - 0.5;
cogl_pipeline_set_uniform_float (self->pipeline,
cogl_pipeline_get_uniform_location (self->pipeline,
"scale"),
2, 1, scale);
cogl_pipeline_set_uniform_float (self->pipeline,
cogl_pipeline_get_uniform_location (self->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,
ClutterPaintContext *paint_context)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (actor);
ClutterActorBox actor_box;
cairo_rectangle_int_t actor_pixel_rect;
CoglFramebuffer *fb;
cairo_region_t *region;
int i, n_rects;
if ((self->clip_region && cairo_region_is_empty (self->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, paint_context, &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 = clutter_paint_context_get_framebuffer (paint_context);
/* Now figure out what to actually paint.
*/
if (self->clip_region)
{
region = cairo_region_copy (self->clip_region);
cairo_region_intersect_rectangle (region, &actor_pixel_rect);
}
else
{
region = cairo_region_create_rectangle (&actor_pixel_rect);
}
if (self->unobscured_region)
cairo_region_intersect (region, self->unobscured_region);
if (cairo_region_is_empty (region))
{
cairo_region_destroy (region);
if (self->content || !self->display || self->monitor == -1)
return;
}
n_rects = cairo_region_num_rectangles (region);
if (n_rects <= MAX_RECTS)
{
for (i = 0; i < n_rects; i++)
{
cairo_rectangle_int_t rect;
cairo_region_get_rectangle (region, i, &rect);
paint_clipped_rectangle (fb, self->pipeline, &rect,
&self->texture_area);
}
}
else
{
cairo_rectangle_int_t rect;
cairo_region_get_extents (region, &rect);
paint_clipped_rectangle (fb, self->pipeline, &rect,
&self->texture_area);
}
cairo_region_destroy (region);
content = meta_background_content_new (self->display, self->monitor);
self->content = META_BACKGROUND_CONTENT (content);
clutter_actor_set_content (CLUTTER_ACTOR (self), content);
}
static void
@ -603,48 +72,11 @@ meta_background_actor_set_property (GObject *object,
{
case PROP_META_DISPLAY:
self->display = g_value_get_object (value);
maybe_create_content (self);
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),
self->gradient_height,
self->gradient_max_darkness);
break;
case PROP_GRADIENT_HEIGHT:
meta_background_actor_set_gradient (self,
self->gradient,
g_value_get_int (value),
self->gradient_max_darkness);
break;
case PROP_GRADIENT_MAX_DARKNESS:
meta_background_actor_set_gradient (self,
self->gradient,
self->gradient_height,
g_value_get_double (value));
break;
case PROP_VIGNETTE:
meta_background_actor_set_vignette (self,
g_value_get_boolean (value),
self->vignette_brightness,
self->vignette_sharpness);
break;
case PROP_VIGNETTE_SHARPNESS:
meta_background_actor_set_vignette (self,
self->vignette,
self->vignette_brightness,
g_value_get_double (value));
break;
case PROP_VIGNETTE_BRIGHTNESS:
meta_background_actor_set_vignette (self,
self->vignette,
g_value_get_double (value),
self->vignette_sharpness);
self->monitor = g_value_get_int (value);
maybe_create_content (self);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
@ -668,27 +100,6 @@ meta_background_actor_get_property (GObject *object,
case PROP_MONITOR:
g_value_set_int (value, self->monitor);
break;
case PROP_BACKGROUND:
g_value_set_object (value, self->background);
break;
case PROP_GRADIENT:
g_value_set_boolean (value, self->gradient);
break;
case PROP_GRADIENT_HEIGHT:
g_value_set_int (value, self->gradient_height);
break;
case PROP_GRADIENT_MAX_DARKNESS:
g_value_set_double (value, self->gradient_max_darkness);
break;
case PROP_VIGNETTE:
g_value_set_boolean (value, self->vignette);
break;
case PROP_VIGNETTE_BRIGHTNESS:
g_value_set_double (value, self->vignette_brightness);
break;
case PROP_VIGNETTE_SHARPNESS:
g_value_set_double (value, self->vignette_sharpness);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -699,18 +110,11 @@ 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",
@ -730,88 +134,15 @@ meta_background_actor_class_init (MetaBackgroundActorClass *klass)
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)
{
self->gradient = FALSE;
self->gradient_height = 0;
self->gradient_max_darkness = 0.0;
self->monitor = -1;
self->vignette = FALSE;
self->vignette_brightness = 1.0;
self->vignette_sharpness = 0.0;
clutter_actor_set_request_mode (CLUTTER_ACTOR (self),
CLUTTER_REQUEST_CONTENT_SIZE);
}
/**
@ -843,8 +174,12 @@ meta_background_actor_cull_out (MetaCullable *cullable,
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (cullable);
set_unobscured_region (self, unobscured_region);
set_clip_region (self, clip_region);
if (!self->content)
return;
meta_background_content_cull_out (self->content,
unobscured_region,
clip_region);
}
static void
@ -852,8 +187,10 @@ meta_background_actor_reset_culling (MetaCullable *cullable)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (cullable);
set_unobscured_region (self, NULL);
set_clip_region (self, NULL);
if (!self->content)
return;
meta_background_content_reset_culling (self->content);
}
static void
@ -874,135 +211,8 @@ cullable_iface_init (MetaCullableInterface *iface)
cairo_region_t *
meta_background_actor_get_clip_region (MetaBackgroundActor *self)
{
return self->clip_region;
}
static void
invalidate_pipeline (MetaBackgroundActor *self,
ChangedFlags changed)
{
self->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)
{
g_return_if_fail (META_IS_BACKGROUND_ACTOR (self));
g_return_if_fail (background == NULL || META_IS_BACKGROUND (background));
if (background == self->background)
return;
if (self->background)
{
g_signal_handlers_disconnect_by_func (self->background,
(gpointer)on_background_changed,
self);
g_object_unref (self->background);
self->background = NULL;
}
if (background)
{
self->background = g_object_ref (background);
g_signal_connect (self->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)
{
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.);
enabled = enabled != FALSE && height != 0;
if (enabled != self->gradient)
{
self->gradient = enabled;
invalidate_pipeline (self, CHANGED_EFFECTS);
changed = TRUE;
}
if (height != self->gradient_height || max_darkness != self->gradient_max_darkness)
{
self->gradient_height = height;
self->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)
{
MetaRectangle old_monitor_geometry;
MetaRectangle new_monitor_geometry;
MetaDisplay *display = self->display;
if(self->monitor == monitor)
return;
meta_display_get_monitor_geometry (display, self->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);
self->monitor = monitor;
}
void
meta_background_actor_set_vignette (MetaBackgroundActor *self,
gboolean enabled,
double brightness,
double sharpness)
{
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.);
enabled = enabled != FALSE;
if (enabled != self->vignette)
{
self->vignette = enabled;
invalidate_pipeline (self, CHANGED_EFFECTS);
changed = TRUE;
}
if (brightness != self->vignette_brightness || sharpness != self->vignette_sharpness)
{
self->vignette_brightness = brightness;
self->vignette_sharpness = sharpness;
invalidate_pipeline (self, CHANGED_VIGNETTE_PARAMETERS);
changed = TRUE;
}
if (changed)
clutter_actor_queue_redraw (CLUTTER_ACTOR (self));
if (!self->content)
return NULL;
return meta_background_content_get_clip_region (self->content);
}

12
src/compositor/plugins/default.c
View File

@ -30,6 +30,7 @@
#include "clutter/clutter.h"
#include "meta/meta-backend.h"
#include "meta/meta-background-actor.h"
#include "meta/meta-background-content.h"
#include "meta/meta-background-group.h"
#include "meta/meta-monitor-manager.h"
#include "meta/meta-plugin.h"
@ -332,6 +333,8 @@ on_monitors_changed (MetaMonitorManager *monitor_manager,
n = meta_display_get_n_monitors (display);
for (i = 0; i < n; i++)
{
MetaBackgroundContent *background_content;
ClutterContent *content;
MetaRectangle rect;
ClutterActor *background_actor;
MetaBackground *background;
@ -340,6 +343,8 @@ on_monitors_changed (MetaMonitorManager *monitor_manager,
meta_display_get_monitor_geometry (display, i, &rect);
background_actor = meta_background_actor_new (display, i);
content = clutter_actor_get_content (background_actor);
background_content = META_BACKGROUND_CONTENT (content);
clutter_actor_set_position (background_actor, rect.x, rect.y);
clutter_actor_set_size (background_actor, rect.width, rect.height);
@ -356,13 +361,10 @@ on_monitors_changed (MetaMonitorManager *monitor_manager,
background = meta_background_new (display);
meta_background_set_color (background, &color);
meta_background_actor_set_background (META_BACKGROUND_ACTOR (background_actor), background);
meta_background_content_set_background (background_content, background);
g_object_unref (background);
meta_background_actor_set_vignette (META_BACKGROUND_ACTOR (background_actor),
TRUE,
0.5,
0.5);
meta_background_content_set_vignette (background_content, TRUE, 0.5, 0.5);
clutter_actor_add_child (self->priv->background_group, background_actor);
}

20
src/meta/meta-background-actor.h
View File

@ -47,24 +47,4 @@ META_EXPORT
ClutterActor *meta_background_actor_new (MetaDisplay *display,
int monitor);
META_EXPORT
void meta_background_actor_set_background (MetaBackgroundActor *self,
MetaBackground *background);
META_EXPORT
void meta_background_actor_set_gradient (MetaBackgroundActor *self,
gboolean enabled,
int height,
double tone_start);
META_EXPORT
void meta_background_actor_set_monitor (MetaBackgroundActor *self,
int monitor);
META_EXPORT
void meta_background_actor_set_vignette (MetaBackgroundActor *self,
gboolean enabled,
double brightness,
double sharpness);
#endif /* META_BACKGROUND_ACTOR_H */