r300g: add support for color0 writes to all bound color buffers.

Thanks to Marek Olšák for making my initial attempt actually work.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 20 insertions, 2 deletions

diff --git a/src/gallium/drivers/r300/r300_state.c b/src/gallium/drivers/r300/r300_state.c
index f902db54cc..62c4f8d85a 100644
--- a/src/gallium/drivers/r300/r300_state.c
+++ b/src/gallium/drivers/r300/r300_state.c
@@ -686,13 +686,22 @@ void r300_mark_fb_state_dirty(struct r300_context *r300,
     struct pipe_framebuffer_state *state = r300->fb_state.state;
     boolean can_hyperz = r300->rws->get_value(r300->rws, R300_CAN_HYPERZ);
 
-    /* What is marked as dirty depends on the enum r300_fb_state_change. */
     r300_mark_atom_dirty(r300, &r300->gpu_flush);
     r300_mark_atom_dirty(r300, &r300->fb_state);
-    r300_mark_atom_dirty(r300, &r300->hyperz_state);
 
+    /* What is marked as dirty depends on the enum r300_fb_state_change. */
     if (change == R300_CHANGED_FB_STATE) {
         r300_mark_atom_dirty(r300, &r300->aa_state);
+    }
+
+    if (change == R300_CHANGED_FB_STATE ||
+        change == R300_CHANGED_CBZB_FLAG ||
+        change == R300_CHANGED_ZCLEAR_FLAG) {
+        r300_mark_atom_dirty(r300, &r300->hyperz_state);
+    }
+
+    if (change == R300_CHANGED_FB_STATE ||
+        change == R300_CHANGED_MULTIWRITE) {
         r300_mark_atom_dirty(r300, &r300->fb_state_pipelined);
     }
 
@@ -876,16 +885,25 @@ static void r300_bind_fs_state(struct pipe_context* pipe, void* shader)
 {
     struct r300_context* r300 = r300_context(pipe);
     struct r300_fragment_shader* fs = (struct r300_fragment_shader*)shader;
+    struct pipe_framebuffer_state *fb = r300->fb_state.state;
+    boolean last_multi_write;
 
     if (fs == NULL) {
         r300->fs.state = NULL;
         return;
     }
 
+    last_multi_write = r300_fragment_shader_writes_all(r300_fs(r300));
+
     r300->fs.state = fs;
     r300_pick_fragment_shader(r300);
     r300_mark_fs_code_dirty(r300);
 
+    if (fb->nr_cbufs > 1 &&
+        last_multi_write != r300_fragment_shader_writes_all(fs)) {
+        r300_mark_fb_state_dirty(r300, R300_CHANGED_MULTIWRITE);
+    }
+
     r300_mark_atom_dirty(r300, &r300->rs_block_state); /* Will be updated before the emission. */
 }