diff options
| -rw-r--r-- | src/gallium/auxiliary/util/u_draw_quad.c | 81 |
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); } |