Commit Graph

9 Commits

Author SHA1 Message Date
Owen W. Taylor
a4a688ed83 Rewrite background code
The old requirement that multiple MetaBackgroundActor objects be
layered on top of each to produce blended backgrounds resulted in
extremely inefficient drawing since the entire framebuffer had
to be read and written multiple times.

 * Replace the MetaBackground ClutterContent with a plain GObject
   that serves to hold the background parameters and prerender
   textures to be used to draw the background. It handles
   colors, gradients, and blended images, but does not handle
   vignetting

 * Add vignetting to MetaBackgroundActor directly.

 * Add MetaBackgroundImage and MetaBackgroundImageCache to allow
   multiple MetaBackground objects to share the same images

By removing the usage of ClutterContent, the following optimizations
were easy to add:

 Blending is turned off when the actor is fully opaque
 Nearest-neighbour filtering is used when drawing 1:1

The GLSL vignette code is slightly improved to use a vertex shader
snippet for computing the texture coordinate => position in actor
mapping.

https://bugzilla.gnome.org/show_bug.cgi?id=735637
2014-09-03 13:43:40 -04:00
Jasper St. Pierre
584460deec background: Merge the code for creating the color texture into here
It's unused anywhere else.
2014-08-07 13:49:16 -04:00
Florian Müllner
d380d30ef4 Update (allow-none) annotations
The annotation has been deprecated in favor of (nullable) and/or
(optional).
2014-05-28 21:55:03 +02:00
Andika Triwidada
fbec4718f8 Changed obsolete FSF postal address into generic URL.
Fix https://bugzilla.gnome.org/show_bug.cgi?id=721517 #2
2014-01-12 08:42:06 +07:00
Neil Roberts
c5bf60eab4 Don't create a dummy texture for the texture pipeline template
The meta_create_texture_pipeline function used to create a dummy 1x1
texture so that it could make sure that the all of the state that
affects the shader generation would be set on the template pipeline so
that Cogl could share the pipeline's shader with any other pipelines
that are just rendering a texture. This is no longer necessary because
the only thing that affects the shader generation is the texture type,
not the actual texture data and Cogl now has a function to explicitly
set the texture type which we can use instead. Additionally even if
the template mechanism is not used at all Cogl will still end up
reusing the same shader because it now has a shader cache which is
indexed by the pipeline state so pipeline's don't strictly need to
share ancestry in order to take advantage of it. However we still
might as well use the function because if there is a common ancestry
it is faster to look up the shader because Cogl doesn't need to hash
the pipeline state.

https://bugzilla.gnome.org/show_bug.cgi?id=707458
2013-09-04 14:23:51 +01:00
Tomeu Vizoso
e0b698d365 Fix gobs of gtk-doc warnings
https://bugzilla.gnome.org/show_bug.cgi?id=676856
2013-03-14 18:02:43 -04:00
Jasper St. Pierre
7f6a77232f compositor: Don't use deprecated Cogl-1.0 API
https://bugzilla.gnome.org/show_bug.cgi?id=694224
2013-02-19 20:05:33 -05:00
Owen W. Taylor
fe12294b92 Create the 1x1 texture for the root background unsliced
When there was no root background pixmap, we were using a 1x1 repeating
texture as a simple way of drawing a solid color without adding a
second code path. However, when that 1x1 texture was combined into
a larger "atlas texture", hardware repeat couldn't be used, so a
small inefficiency from this approach became an enormous inefficiency
as clutter drew every pixel of the background as a separate rectangle.

https://bugzilla.gnome.org/show_bug.cgi?id=652507
2011-06-29 12:27:02 -04:00
Owen W. Taylor
0477a3066d Refactor "texture material" creation from MetaShadowFactory
Create new cogl-utils.[ch] and move a helper function from
MetaShadowFactory there as meta_create_texture_material(); this
allows us to create single-layer materials from different parts of
Mutter and have them share the same template material.

Also expose a function for creating a 1x1 texture of a given
color meta_create_color_texture_4ub().

https://bugzilla.gnome.org/show_bug.cgi?id=634833
2010-11-18 13:58:37 -05:00