[Nouveau] [PATCH] nv50, nvc0: only clear out the buffers that we were asked to clear

[Ilia Mirkin]

Fixes fbo-drawbuffers-none glClearBuffer piglit test.

Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
---

Only tested on nv50, but implementations seem similar enough.

 src/gallium/drivers/nouveau/nv50/nv50_surface.c | 17 +++++++++--------
 src/gallium/drivers/nouveau/nvc0/nvc0_surface.c | 17 +++++++++--------
 2 files changed, 18 insertions(+), 16 deletions(-)

diff --git a/src/gallium/drivers/nouveau/nv50/nv50_surface.c b/src/gallium/drivers/nouveau/nv50/nv50_surface.c
index 358f57a..eb27429 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_surface.c
+++ b/src/gallium/drivers/nouveau/nv50/nv50_surface.c
@@ -408,9 +408,6 @@ nv50_clear(struct pipe_context *pipe, unsigned buffers,
       PUSH_DATAf(push, color->f[1]);
       PUSH_DATAf(push, color->f[2]);
       PUSH_DATAf(push, color->f[3]);
-      mode =
-         NV50_3D_CLEAR_BUFFERS_R | NV50_3D_CLEAR_BUFFERS_G |
-         NV50_3D_CLEAR_BUFFERS_B | NV50_3D_CLEAR_BUFFERS_A;
    }
 
    if (buffers & PIPE_CLEAR_DEPTH) {
@@ -425,12 +422,16 @@ nv50_clear(struct pipe_context *pipe, unsigned buffers,
       mode |= NV50_3D_CLEAR_BUFFERS_S;
    }
 
-   BEGIN_NV04(push, NV50_3D(CLEAR_BUFFERS), 1);
-   PUSH_DATA (push, mode);
-
-   for (i = 1; i < fb->nr_cbufs; i++) {
+   if (mode) {
       BEGIN_NV04(push, NV50_3D(CLEAR_BUFFERS), 1);
-      PUSH_DATA (push, (i << 6) | 0x3c);
+      PUSH_DATA (push, mode);
+   }
+
+   for (i = 0; i < fb->nr_cbufs; i++) {
+      if (buffers & (PIPE_CLEAR_COLOR0 << i)) {
+         BEGIN_NV04(push, NV50_3D(CLEAR_BUFFERS), 1);
+         PUSH_DATA (push, (i << 6) | 0x3c);
+      }
    }
 }
 
diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_surface.c b/src/gallium/drivers/nouveau/nvc0/nvc0_surface.c
index 5375bd4..0c12bce 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_surface.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_surface.c
@@ -427,9 +427,6 @@ nvc0_clear(struct pipe_context *pipe, unsigned buffers,
       PUSH_DATAf(push, color->f[1]);
       PUSH_DATAf(push, color->f[2]);
       PUSH_DATAf(push, color->f[3]);
-      mode =
-         NVC0_3D_CLEAR_BUFFERS_R | NVC0_3D_CLEAR_BUFFERS_G |
-         NVC0_3D_CLEAR_BUFFERS_B | NVC0_3D_CLEAR_BUFFERS_A;
    }
 
    if (buffers & PIPE_CLEAR_DEPTH) {
@@ -444,12 +441,16 @@ nvc0_clear(struct pipe_context *pipe, unsigned buffers,
       mode |= NVC0_3D_CLEAR_BUFFERS_S;
    }
 
-   BEGIN_NVC0(push, NVC0_3D(CLEAR_BUFFERS), 1);
-   PUSH_DATA (push, mode);
-
-   for (i = 1; i < fb->nr_cbufs; i++) {
+   if (mode) {
       BEGIN_NVC0(push, NVC0_3D(CLEAR_BUFFERS), 1);
-      PUSH_DATA (push, (i << 6) | 0x3c);
+      PUSH_DATA (push, mode);
+   }
+
+   for (i = 0; i < fb->nr_cbufs; i++) {
+      if (buffers & (PIPE_CLEAR_COLOR0 << i)) {
+         BEGIN_NVC0(push, NVC0_3D(CLEAR_BUFFERS), 1);
+         PUSH_DATA (push, (i << 6) | 0x3c);
+      }
    }
 }
 
-- 
1.8.3.2