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authorMarek Olšák <maraeo@gmail.com>2010-11-14 18:57:14 +0100
committerMarek Olšák <maraeo@gmail.com>2010-11-20 16:20:48 +0100
commitffb732d8bd51f0a40379590a6485de2a56a2a306 (patch)
tree5e386ee294515373bdc73e1569b3a5b86ab1269f /src/gallium/drivers/r300/r300_state.c
parentb6b91fa02911f5dfc5d528d822674ee5557800d9 (diff)
r300g: fix rendering with no vertex elements
Fixes glsl-vs-point-size, although I meant to fix glsl-novertexdata. Since swrast fails glsl-novertexdata too, I guess it's a core issue.
Diffstat (limited to 'src/gallium/drivers/r300/r300_state.c')
-rw-r--r--src/gallium/drivers/r300/r300_state.c20
1 files changed, 19 insertions, 1 deletions
diff --git a/src/gallium/drivers/r300/r300_state.c b/src/gallium/drivers/r300/r300_state.c
index bd08bf2d3fd..247c22216e1 100644
--- a/src/gallium/drivers/r300/r300_state.c
+++ b/src/gallium/drivers/r300/r300_state.c
@@ -1448,6 +1448,15 @@ static void r300_set_vertex_buffers(struct pipe_context* pipe,
struct pipe_vertex_buffer *vbo;
unsigned i, max_index = (1 << 24) - 1;
boolean any_user_buffer = FALSE;
+ struct pipe_vertex_buffer dummy_vb = {0};
+
+ /* There must be at least one vertex buffer set, otherwise it locks up. */
+ if (!count) {
+ dummy_vb.buffer = r300->dummy_vb;
+ dummy_vb.max_index = r300->dummy_vb->width0 / 4;
+ buffers = &dummy_vb;
+ count = 1;
+ }
if (count == r300->vertex_buffer_count &&
memcmp(r300->vertex_buffer, buffers,
@@ -1601,6 +1610,14 @@ static void* r300_create_vertex_elements_state(struct pipe_context* pipe,
struct r300_vertex_element_state *velems;
unsigned i;
enum pipe_format *format;
+ struct pipe_vertex_element dummy_attrib = {0};
+
+ /* R300 Programmable Stream Control (PSC) doesn't support 0 vertex elements. */
+ if (!count) {
+ dummy_attrib.src_format = PIPE_FORMAT_R8G8B8A8_UNORM;
+ attribs = &dummy_attrib;
+ count = 1;
+ }
assert(count <= PIPE_MAX_ATTRIBS);
velems = CALLOC_STRUCT(r300_vertex_element_state);
@@ -1667,7 +1684,8 @@ static void* r300_create_vertex_elements_state(struct pipe_context* pipe,
* swizzles are already set up.
* Also compute the vertex size. */
for (i = 0; i < count; i++) {
- /* This is OK because we check for aligned strides too. */
+ /* This is OK because we check for aligned strides too
+ * elsewhere. */
velems->hw_format_size[i] =
align(util_format_get_blocksize(velems->hw_format[i]), 4);
velems->vertex_size_dwords += velems->hw_format_size[i] / 4;