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StThemeNodeTransition: work around Cogl bug

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Switch to using the layer combine constant rather than the material
primary color for representing the opacity of the material; this
avoids triggering a Cogl bug where changing the primary color corrupts
the layer state.

https://bugzilla.gnome.org/show_bug.cgi?id=629616
This commit is contained in:
Owen W. Taylor 2010-09-23 10:04:44 -04:00
parent cbf2cbac61
commit 8f0f159960
1 changed files with 5 additions and 4 deletions
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9
src/st/st-theme-node-transition.c
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@ -263,7 +263,7 @@ setup_framebuffers (StThemeNodeTransition *transition,
NULL);
cogl_material_set_layer_combine (material_template, 2,
"RGBA = MODULATE (PREVIOUS, "
"PRIMARY)",
"CONSTANT)",
NULL);
}
priv->material = cogl_material_copy (material_template);
@ -322,9 +322,10 @@ st_theme_node_transition_paint (StThemeNodeTransition *transition,
clutter_alpha_get_alpha (priv->alpha));
cogl_material_set_layer_combine_constant (priv->material, 1, &constant);
cogl_material_set_color4ub (priv->material,
paint_opacity, paint_opacity,
paint_opacity, paint_opacity);
cogl_color_set_from_4ub (&constant,
paint_opacity, paint_opacity,
paint_opacity, paint_opacity);
cogl_material_set_layer_combine_constant (priv->material, 2, &constant);
cogl_set_source (priv->material);
cogl_rectangle_with_multitexture_coords (priv->offscreen_box.x1,