ARB_shader_image_load_store only requires a very fixed list of formats
to be supported, while textures may be in all kinds of formats, like
BGRA which are presently not supported on at least Kepler.
Signed-off-by: Ilia Mirkin <imir...@alum.mit.edu>
---
src/mesa/state_tracker/st_cb_readpixels.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/src/mesa/state_tracker/st_cb_readpixels.c
b/src/mesa/state_tracker/st_cb_readpixels.c
index 6df3a39..09450c9 100644
--- a/src/mesa/state_tracker/st_cb_readpixels.c
+++ b/src/mesa/state_tracker/st_cb_readpixels.c
@@ -79,6 +79,7 @@ try_pbo_readpixels(struct st_context *st, struct
st_renderbuffer *strb,
const struct gl_pixelstore_attrib *pack, void *pixels)
{
struct pipe_context *pipe = st->pipe;
+ struct pipe_screen *screen = pipe->screen;
struct cso_context *cso = st->cso_context;
struct pipe_surface *surface = strb->surface;
struct pipe_resource *texture = strb->texture;
@@ -91,6 +92,11 @@ try_pbo_readpixels(struct st_context *st, struct
st_renderbuffer *strb,
if (texture->nr_samples > 1)
return false;
+ if (!screen->is_format_supported(screen, dst_format, PIPE_TEXTURE_2D,
+ texture->nr_samples,
+ PIPE_BIND_SHADER_IMAGE))
+ return false;
+
desc = util_format_description(dst_format);
/* Compute PBO addresses */
--
2.7.3
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