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clutter-offscreen-effect: Don't recreate the material when FBO changes

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Previously whenever the size of the FBO changes it would create a new
material and attach the texture to it. This is not good for Cogl
because it throws away any cached state for the material. In
test-rotate the size of the FBO changes constantly so it effectively
uses a new material every paint. For shader effects this also ends up
relinking the shader every paint because the linked programs are part
of the material state.
This commit is contained in:
Neil Roberts 2010-11-25 10:56:50 +00:00
parent 1b2a748d6c
commit 6ddb839711
1 changed files with 5 additions and 7 deletions
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12
clutter/clutter-offscreen-effect.c
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@ -152,13 +152,8 @@ update_fbo (ClutterEffect *effect, int fbo_width, int fbo_height)
priv->target_height == fbo_height)
return TRUE;
if (priv->target != COGL_INVALID_HANDLE)
{
cogl_handle_unref (priv->target);
cogl_handle_unref (priv->offscreen);
}
priv->target = cogl_material_new ();
if (priv->target == COGL_INVALID_HANDLE)
priv->target = cogl_material_new ();
texture =
clutter_offscreen_effect_create_texture (self, fbo_width, fbo_height);
@ -175,6 +170,9 @@ update_fbo (ClutterEffect *effect, int fbo_width, int fbo_height)
priv->target_width = cogl_texture_get_width (texture);
priv->target_height = cogl_texture_get_height (texture);
if (priv->offscreen != COGL_INVALID_HANDLE)
cogl_handle_unref (priv->offscreen);
priv->offscreen = cogl_offscreen_new_to_texture (texture);
if (priv->offscreen == COGL_INVALID_HANDLE)
{