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-rw-r--r--src/gallium/auxiliary/util/u_draw_quad.c81
1 files changed, 40 insertions, 41 deletions
diff --git a/src/gallium/auxiliary/util/u_draw_quad.c b/src/gallium/auxiliary/util/u_draw_quad.c
index e659edb088..bf143815d8 100644
--- a/src/gallium/auxiliary/util/u_draw_quad.c
+++ b/src/gallium/auxiliary/util/u_draw_quad.c
@@ -82,52 +82,51 @@ util_draw_texquad(struct pipe_context *pipe,
{
struct pipe_buffer *vbuf;
uint numAttribs = 2, vertexBytes, i, j;
- float *v;
vertexBytes = 4 * (4 * numAttribs * sizeof(float));
/* XXX create one-time */
vbuf = pipe->winsys->buffer_create(pipe->winsys, 32,
PIPE_BUFFER_USAGE_VERTEX, vertexBytes);
- assert(vbuf);
-
- v = (float *) pipe->winsys->buffer_map(pipe->winsys, vbuf,
- PIPE_BUFFER_USAGE_CPU_WRITE);
-
- /*
- * Load vertex buffer
- */
- for (i = j = 0; i < 4; i++) {
- v[j + 2] = z; /* z */
- v[j + 3] = 1.0; /* w */
- v[j + 6] = 0.0; /* r */
- v[j + 7] = 1.0; /* q */
- j += 8;
+ if (vbuf) {
+ float *v = (float *) pipe->winsys->buffer_map(pipe->winsys, vbuf,
+ PIPE_BUFFER_USAGE_CPU_WRITE);
+ if (v) {
+ /*
+ * Load vertex buffer
+ */
+ for (i = j = 0; i < 4; i++) {
+ v[j + 2] = z; /* z */
+ v[j + 3] = 1.0; /* w */
+ v[j + 6] = 0.0; /* r */
+ v[j + 7] = 1.0; /* q */
+ j += 8;
+ }
+
+ v[0] = x0;
+ v[1] = y0;
+ v[4] = 0.0; /*s*/
+ v[5] = 0.0; /*t*/
+
+ v[8] = x1;
+ v[9] = y0;
+ v[12] = 1.0;
+ v[13] = 0.0;
+
+ v[16] = x1;
+ v[17] = y1;
+ v[20] = 1.0;
+ v[21] = 1.0;
+
+ v[24] = x0;
+ v[25] = y1;
+ v[28] = 0.0;
+ v[29] = 1.0;
+
+ pipe->winsys->buffer_unmap(pipe->winsys, vbuf);
+ util_draw_vertex_buffer(pipe, vbuf, PIPE_PRIM_TRIANGLE_FAN, 4, 2);
+ }
+
+ pipe_buffer_reference(pipe->winsys, &vbuf, NULL);
}
-
- v[0] = x0;
- v[1] = y0;
- v[4] = 0.0; /*s*/
- v[5] = 0.0; /*t*/
-
- v[8] = x1;
- v[9] = y0;
- v[12] = 1.0;
- v[13] = 0.0;
-
- v[16] = x1;
- v[17] = y1;
- v[20] = 1.0;
- v[21] = 1.0;
-
- v[24] = x0;
- v[25] = y1;
- v[28] = 0.0;
- v[29] = 1.0;
-
- pipe->winsys->buffer_unmap(pipe->winsys, vbuf);
-
- util_draw_vertex_buffer(pipe, vbuf, PIPE_PRIM_TRIANGLE_FAN, 4, 2);
-
- pipe_buffer_reference(pipe->winsys, &vbuf, NULL);
}