r300g: use cliprects for scissoring

Cliprects can be disabled, scissors can't. It maps nicely to hardware.

1 files changed, 5 insertions, 15 deletions

diff --git a/src/gallium/drivers/r300/r300_state.c b/src/gallium/drivers/r300/r300_state.c
index f549b453ee..95ce1a9600 100644
--- a/src/gallium/drivers/r300/r300_state.c
+++ b/src/gallium/drivers/r300/r300_state.c
@@ -641,16 +641,13 @@ static void
     if (!!old_state->zsbuf != !!state->zsbuf) {
         r300->dsa_state.dirty = TRUE;
     }
-    if (!r300->scissor_enabled) {
-        r300->scissor_state.dirty = TRUE;
-    }
 
     r300_fb_update_tiling_flags(r300, r300->fb_state.state, state);
 
     memcpy(r300->fb_state.state, state, sizeof(struct pipe_framebuffer_state));
 
     r300->fb_state.size = (10 * state->nr_cbufs) + (2 * (4 - state->nr_cbufs)) +
-                          (state->zsbuf ? 10 : 0) + 8;
+                          (state->zsbuf ? 10 : 0) + 11;
 
     /* Polygon offset depends on the zbuffer bit depth. */
     if (state->zsbuf && r300->polygon_offset_enabled) {
@@ -836,6 +833,8 @@ static void* r300_create_rs_state(struct pipe_context* pipe,
         rs->color_control = R300_SHADE_MODEL_SMOOTH;
     }
 
+    rs->clip_rule = state->scissor ? 0xAAAA : 0xFFFF;
+
     return (void*)rs;
 }
 
@@ -844,7 +843,6 @@ static void r300_bind_rs_state(struct pipe_context* pipe, void* state)
 {
     struct r300_context* r300 = r300_context(pipe);
     struct r300_rs_state* rs = (struct r300_rs_state*)state;
-    boolean scissor_was_enabled = r300->scissor_enabled;
 
     if (r300->draw) {
         draw_flush(r300->draw);
@@ -853,18 +851,12 @@ static void r300_bind_rs_state(struct pipe_context* pipe, void* state)
 
     if (rs) {
         r300->polygon_offset_enabled = rs->rs.offset_cw || rs->rs.offset_ccw;
-        r300->scissor_enabled = rs->rs.scissor;
     } else {
         r300->polygon_offset_enabled = FALSE;
-        r300->scissor_enabled = FALSE;
     }
 
     UPDATE_STATE(state, r300->rs_state);
-    r300->rs_state.size = 17 + (r300->polygon_offset_enabled ? 5 : 0);
-
-    if (scissor_was_enabled != r300->scissor_enabled) {
-        r300->scissor_state.dirty = TRUE;
-    }
+    r300->rs_state.size = 19 + (r300->polygon_offset_enabled ? 5 : 0);
 }
 
 /* Free rasterizer state. */
@@ -1070,9 +1062,7 @@ static void r300_set_scissor_state(struct pipe_context* pipe,
     memcpy(r300->scissor_state.state, state,
         sizeof(struct pipe_scissor_state));
 
-    if (r300->scissor_enabled) {
-        r300->scissor_state.dirty = TRUE;
-    }
+    r300->scissor_state.dirty = TRUE;
 }
 
 static void r300_set_viewport_state(struct pipe_context* pipe,