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shaped-texture: Use nearest-pixel interpolation if the texture is unscaled

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Use nearest-pixel interpolation if the texture is unscaled. This
improves performance, especially with software rendering.

Bug: https://bugzilla.gnome.org/show_bug.cgi?id=708389
This commit is contained in:
Hans Petter Jansson 2013-10-10 02:38:52 +02:00
parent 71f574bc52
commit 8af0e10aa4
1 changed files with 21 additions and 0 deletions
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21
src/compositor/meta-shaped-texture.c
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@ -30,6 +30,7 @@
#include <config.h>
#include <meta/meta-shaped-texture.h>
#include "clutter-utils.h"
#include "meta-texture-tower.h"
#include <clutter/clutter.h>
@ -209,6 +210,7 @@ meta_shaped_texture_paint (ClutterActor *actor)
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;
@ -245,6 +247,22 @@ meta_shaped_texture_paint (ClutterActor *actor)
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))
{
int x_origin, y_origin;
if (meta_actor_is_untransformed (actor,
&x_origin,
&y_origin))
filter = COGL_PIPELINE_FILTER_NEAREST;
}
ctx = clutter_backend_get_cogl_context (clutter_get_default_backend ());
fb = cogl_get_draw_framebuffer ();
@ -273,6 +291,7 @@ meta_shaped_texture_paint (ClutterActor *actor)
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++)
@ -314,9 +333,11 @@ meta_shaped_texture_paint (ClutterActor *actor)
{
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;