r300g: flush zmasks of zbuffers we are going to use as samplers

It sometimes works, sometimes not. I guess we have the zmask offsets wrong.

1 files changed, 36 insertions, 0 deletions

diff --git a/src/gallium/drivers/r300/r300_state_derived.c b/src/gallium/drivers/r300/r300_state_derived.c
index a85b46f..693b1e2 100644
--- a/src/gallium/drivers/r300/r300_state_derived.c
+++ b/src/gallium/drivers/r300/r300_state_derived.c
@@ -677,8 +677,44 @@ static void r300_merge_textures_and_samplers(struct r300_context* r300)
     }
 }
 
+/* We can't use compressed zbuffers as samplers. */
+static void r300_flush_depth_textures(struct r300_context *r300)
+{
+    struct r300_textures_state *state =
+        (struct r300_textures_state*)r300->textures_state.state;
+    unsigned i, level;
+    unsigned count = MIN2(state->sampler_view_count,
+                          state->sampler_state_count);
+
+    if (r300->z_decomp_rd)
+        return;
+
+    for (i = 0; i < count; i++)
+        if (state->sampler_views[i] && state->sampler_states[i]) {
+            struct pipe_resource *tex = state->sampler_views[i]->base.texture;
+
+            if (tex->target == PIPE_TEXTURE_3D ||
+                tex->target == PIPE_TEXTURE_CUBE)
+                continue;
+
+            /* Ignore non-depth textures.
+             * Also ignore reinterpreted depth textures, e.g. resource_copy. */
+            if (!util_format_is_depth_or_stencil(tex->format))
+                continue;
+
+            for (level = 0; level <= tex->last_level; level++)
+                if (r300_texture(tex)->dirty_zmask[level]) {
+                    /* We don't handle 3D textures and cubemaps yet. */
+                    r300_flush_depth_stencil(&r300->context, tex,
+                                             u_subresource(0, level), 0);
+                }
+        }
+}
+
 void r300_update_derived_state(struct r300_context* r300)
 {
+    r300_flush_depth_textures(r300);
+
     if (r300->textures_state.dirty) {
         r300_merge_textures_and_samplers(r300);
     }