OpenHarmony/third_party_mesa3d
2
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mesa/st: add ARB_uniform_buffer_object support (v2)

Browse Source 
this adds UBO support to the state tracker, it works with softpipe
as-is.

It uses UARL + CONST[x][ADDR[0].x] type constructs.

v2: don't disable UBOs if geom shaders don't exist (me)
rename upload to bind (calim)
fix 12 -> 13 comparison as comment (calim + brianp)
fix signed->unsigned (Brian)
remove assert (Brian)

Reviewed-by: Brian Paul <brianp@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie
2012-12-06 16:16:10 +10:00
parent 535e248c5f
commit 73ae865af8
6 changed files with 147 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
src/mesa/state_tracker/st_extensions.c
View File

@@ -70,6 +70,8 @@ void st_init_limits(struct st_context *st)
struct pipe_screen *screen = st->pipe->screen;
struct gl_constants *c = &st->ctx->Const;
gl_shader_type sh;
boolean can_ubo = TRUE;
int max_const_buffers;
c->MaxTextureLevels
= _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS),
@@ -218,6 +220,17 @@ void st_init_limits(struct st_context *st)
options->EmitNoIndirectUniform = !screen->get_shader_param(screen, sh,
PIPE_SHADER_CAP_INDIRECT_CONST_ADDR);
if (pc->MaxNativeInstructions) {
if (options->EmitNoIndirectUniform)
can_ubo = FALSE;
max_const_buffers = screen->get_shader_param(screen, sh,
PIPE_SHADER_CAP_MAX_CONST_BUFFERS);
/* we need 13 buffers - 1 constant, 12 UBO */
if (max_const_buffers < 13)
can_ubo = FALSE;
}
if (options->EmitNoLoops)
options->MaxUnrollIterations = MIN2(screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS), 65536);
else
@@ -251,6 +264,9 @@ void st_init_limits(struct st_context *st)
c->GLSLSkipStrictMaxVaryingLimitCheck =
screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_VARYINGS);
if (can_ubo)
st->ctx->Extensions.ARB_uniform_buffer_object = GL_TRUE;
}