diff options
Diffstat (limited to 'src/mesa/state_tracker/st_atom_constbuf.c')
| -rw-r--r-- | src/mesa/state_tracker/st_atom_constbuf.c | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/src/mesa/state_tracker/st_atom_constbuf.c b/src/mesa/state_tracker/st_atom_constbuf.c index f1d08a3e16..05667a7430 100644 --- a/src/mesa/state_tracker/st_atom_constbuf.c +++ b/src/mesa/state_tracker/st_atom_constbuf.c @@ -56,7 +56,6 @@ void st_upload_constants( struct st_context *st, unsigned shader_type) { struct pipe_context *pipe = st->pipe; - struct pipe_resource **cbuf = &st->state.constants[shader_type]; assert(shader_type == PIPE_SHADER_VERTEX || shader_type == PIPE_SHADER_FRAGMENT || @@ -64,6 +63,7 @@ void st_upload_constants( struct st_context *st, /* update constants */ if (params && params->NumParameters) { + struct pipe_resource *cbuf; const uint paramBytes = params->NumParameters * sizeof(GLfloat) * 4; /* Update the constants which come from fixed-function state, such as @@ -75,11 +75,12 @@ void st_upload_constants( struct st_context *st, /* We always need to get a new buffer, to keep the drivers simple and * avoid gratuitous rendering synchronization. + * Let's use a user buffer to avoid an unnecessary copy. */ - pipe_resource_reference(cbuf, NULL ); - *cbuf = pipe_buffer_create(pipe->screen, - PIPE_BIND_CONSTANT_BUFFER, - paramBytes ); + cbuf = pipe_user_buffer_create(pipe->screen, + params->ParameterValues, + paramBytes, + PIPE_BIND_CONSTANT_BUFFER); if (ST_DEBUG & DEBUG_CONSTANTS) { debug_printf("%s(shader=%d, numParams=%d, stateFlags=0x%x)\n", @@ -88,17 +89,15 @@ void st_upload_constants( struct st_context *st, _mesa_print_parameter_list(params); } - /* load Mesa constants into the constant buffer */ - pipe_buffer_write(st->pipe, *cbuf, - 0, paramBytes, - params->ParameterValues); + st->pipe->set_constant_buffer(st->pipe, shader_type, 0, cbuf); + pipe_resource_reference(&cbuf, NULL); - st->pipe->set_constant_buffer(st->pipe, shader_type, 0, *cbuf); + st->state.constants[shader_type].ptr = params->ParameterValues; + st->state.constants[shader_type].size = paramBytes; } - else if (*cbuf) { - st->constants.tracked_state[shader_type].dirty.mesa = 0x0; - - pipe_resource_reference(cbuf, NULL); + else if (st->state.constants[shader_type].ptr) { + st->state.constants[shader_type].ptr = NULL; + st->state.constants[shader_type].size = 0; st->pipe->set_constant_buffer(st->pipe, shader_type, 0, NULL); } } |