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u_vbuf: add logic to use a limited number of vbufs

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Make it possible to limit the number of vertex buffers as there exist
GPUs with less then 32 supported vertex buffers.

Signed-off-by: Wladimir J. van der Laan <laanwj@gmail.com>
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/2807>
This commit is contained in:
Wladimir J. van der Laan
2016-06-11 21:21:52 +02:00
committed by Marge Bot
parent 5bd6a5c41b
commit 5f37e38b81
2 changed files with 8 additions and 0 deletions
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5
src/gallium/auxiliary/util/u_vbuf.c
View File

@@ -180,6 +180,8 @@ struct u_vbuf {
uint32_t incompatible_vb_mask; /* each bit describes a corresp. buffer */
/* Which buffer has a non-zero stride. */
uint32_t nonzero_stride_vb_mask; /* each bit describes a corresp. buffer */
/* Which buffers are allowed (supported by hardware). */
uint32_t allowed_vb_mask;
};
static void *
@@ -287,6 +289,8 @@ boolean u_vbuf_get_caps(struct pipe_screen *screen, struct u_vbuf_caps *caps,
PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY);
caps->user_vertex_buffers =
screen->get_param(screen, PIPE_CAP_USER_VERTEX_BUFFERS);
caps->max_vertex_buffers =
screen->get_param(screen, PIPE_CAP_MAX_VERTEX_BUFFERS);
if (!caps->buffer_offset_unaligned ||
!caps->buffer_stride_unaligned ||
@@ -308,6 +312,7 @@ u_vbuf_create(struct pipe_context *pipe, struct u_vbuf_caps *caps)
mgr->cso_cache = cso_cache_create();
mgr->translate_cache = translate_cache_create();
memset(mgr->fallback_vbs, ~0, sizeof(mgr->fallback_vbs));
mgr->allowed_vb_mask = u_bit_consecutive(0, mgr->caps.max_vertex_buffers);
mgr->has_signed_vb_offset =
pipe->screen->get_param(pipe->screen,

3
src/gallium/auxiliary/util/u_vbuf.h
View File

@@ -54,6 +54,9 @@ struct u_vbuf_caps {
/* Whether the driver supports user vertex buffers. */
unsigned user_vertex_buffers:1;
/* Maximum number of vertex buffers */
unsigned max_vertex_buffers:6;
};