st/mesa: fix st_CopyPixels without support for stencil exports
Fixes: f611af35948e ("st/mesa: use fragment shader to copy stencil buffer")
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5940>
diff --git a/src/mesa/state_tracker/st_cb_drawpixels.c b/src/mesa/state_tracker/st_cb_drawpixels.c
index 0537c6d..366c324 100644
--- a/src/mesa/state_tracker/st_cb_drawpixels.c
+++ b/src/mesa/state_tracker/st_cb_drawpixels.c
@@ -1724,6 +1724,13 @@
return;
}
+ /* fallback if the driver can't do stencil exports */
+ if (type == GL_STENCIL &&
+ !pipe->screen->get_param(pipe->screen, PIPE_CAP_SHADER_STENCIL_EXPORT)) {
+ copy_stencil_pixels(ctx, srcx, srcy, width, height, dstx, dsty);
+ return;
+ }
+
/*
* The subsequent code implements glCopyPixels by copying the source
* pixels into a temporary texture that's then applied to a textured quad.
