Composite cube logo against background color.

From: Kristian Høgsberg <krh@redhat.com>


---

 plugins/cube.c |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/plugins/cube.c b/plugins/cube.c
index b605e22..6439b9e 100644
--- a/plugins/cube.c
+++ b/plugins/cube.c
@@ -1204,11 +1204,28 @@ cubePaintTransformedScreen (CompScreen		
 
 	if (cs->invert == 1 && s->size == 4 && cs->texture.name)
 	{
+	    glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE);
+
+	    glTexEnvf (GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_INTERPOLATE);
+	    glTexEnvf (GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_TEXTURE0);
+	    glTexEnvf (GL_TEXTURE_ENV, GL_SOURCE1_RGB, GL_PRIMARY_COLOR);
+	    glTexEnvf (GL_TEXTURE_ENV, GL_SOURCE2_RGB, GL_TEXTURE0);
+	    glTexEnvf (GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR);
+	    glTexEnvf (GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR);
+	    glTexEnvf (GL_TEXTURE_ENV, GL_OPERAND2_RGB, GL_SRC_ALPHA);
+
+	    glTexEnvf (GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_REPLACE);
+	    glTexEnvf (GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_PREVIOUS);
+	    glTexEnvf (GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA);
+
 	    enableTexture (s, &cs->texture, COMP_TEXTURE_FILTER_GOOD);
+
 	    glTexCoordPointer (2, GL_FLOAT, 0, cs->tc);
 	    glDrawArrays (GL_TRIANGLE_FAN, 0, cs->nvertices >> 1);
 	    disableTexture (s, &cs->texture);
 	    glDisableClientState (GL_TEXTURE_COORD_ARRAY);
+
+	    glTexEnvi (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 	}
 	else
 	{