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glamor: swizzle RED to 0 for alpha textures

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I'm pretty sure Eric suspected this could cause a problem, and we
couldn't find a test. Well loading feedly in firefox seems to trigger
badness that this solves.

bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=94554
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Tested-by: Timo Aaltonen <tjaalton@ubuntu.com>
This commit is contained in:
Dave Airlie 2016-03-16 10:45:54 +10:00 committed by Adam Jackson
parent 4583fa9a6c
commit a288cf58a0
1 changed files with 3 additions and 1 deletions
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4
glamor/glamor_fbo.c
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@ -352,8 +352,10 @@ _glamor_create_tex(glamor_screen_private *glamor_priv,
glBindTexture(GL_TEXTURE_2D, tex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
if (format == glamor_priv->one_channel_format && format == GL_RED)
if (format == glamor_priv->one_channel_format && format == GL_RED) {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_R, GL_ZERO);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_A, GL_RED);
}
glamor_priv->suppress_gl_out_of_memory_logging = true;
glTexImage2D(GL_TEXTURE_2D, 0, format, w, h, 0,
format, GL_UNSIGNED_BYTE, NULL);