gallium/util: Fix util_blitter_clear_render_target() for num_layers>1

Previously util_blitter_clear_render_target() could not clear more
than the first layer. We need to generalise this so that
ARB_clear_texture can pass the 3d piglit test.

Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>

diff --git a/src/gallium/auxiliary/util/u_blitter.c b/src/gallium/auxiliary/util/u_blitter.c
index fccc92c06c4adccf045964250ed012f8c10fa625..7f213fad737eeeacb03a1167bad2986851f147b5 100644 (file)
--- a/src/gallium/auxiliary/util/u_blitter.c
+++ b/src/gallium/auxiliary/util/u_blitter.c
@@ -1852,10 +1852,19 @@ void util_blitter_clear_render_target(struct blitter_context *blitter,
    pipe->set_framebuffer_state(pipe, &fb_state);
    pipe->set_sample_mask(pipe, ~0);
 
-   blitter_set_common_draw_rect_state(ctx, FALSE, FALSE);
    blitter_set_dst_dimensions(ctx, dstsurf->width, dstsurf->height);
-   blitter->draw_rectangle(blitter, dstx, dsty, dstx+width, dsty+height, 0,
-                           UTIL_BLITTER_ATTRIB_COLOR, color);
+
+   unsigned num_layers = dstsurf->u.tex.last_layer - dstsurf->u.tex.first_layer + 1;
+   if (num_layers > 1 && ctx->has_layered) {
+      blitter_set_common_draw_rect_state(ctx, FALSE, TRUE);
+      blitter_set_clear_color(ctx, color);
+      blitter_draw(ctx, dstx, dsty, dstx+width, dsty+height, 0, num_layers);
+   }
+   else {
+      blitter_set_common_draw_rect_state(ctx, FALSE, FALSE);
+      blitter->draw_rectangle(blitter, dstx, dsty, dstx+width, dsty+height, 0,
+                              UTIL_BLITTER_ATTRIB_COLOR, color);
+   }
 
    blitter_restore_vertex_states(ctx);
    blitter_restore_fragment_states(ctx);