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radeonsi: move sample positions constant buffer to RW buffers 

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
This commit is contained in:
Marek Olšák 2016-04-19 01:53:03 +02:00
parent 860b658b97
commit 302bec24bd
3 changed files with 5 additions and 4 deletions
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4
src/gallium/drivers/radeonsi/si_shader.c
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@ -1135,8 +1135,8 @@ static LLVMValueRef load_sample_position(struct radeon_llvm_context *radeon_bld,
struct lp_build_context *uint_bld = &radeon_bld->soa.bld_base.uint_bld;
struct gallivm_state *gallivm = &radeon_bld->gallivm;
LLVMBuilderRef builder = gallivm->builder;
LLVMValueRef desc = LLVMGetParam(ctx->radeon_bld.main_fn, SI_PARAM_CONST_BUFFERS);
LLVMValueRef buf_index = lp_build_const_int32(gallivm, SI_DRIVER_STATE_CONST_BUF);
LLVMValueRef desc = LLVMGetParam(ctx->radeon_bld.main_fn, SI_PARAM_RW_BUFFERS);
LLVMValueRef buf_index = lp_build_const_int32(gallivm, SI_PS_CONST_SAMPLE_POSITIONS);
LLVMValueRef resource = build_indexed_load_const(ctx, desc, buf_index);
/* offset = sample_id * 8 (8 = 2 floats containing samplepos.xy) */

4
src/gallium/drivers/radeonsi/si_state.c
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@ -2544,8 +2544,8 @@ static void si_set_framebuffer_state(struct pipe_context *ctx,
assert(0);
}
constbuf.buffer_size = sctx->framebuffer.nr_samples * 2 * 4;
ctx->set_constant_buffer(ctx, PIPE_SHADER_FRAGMENT,
SI_DRIVER_STATE_CONST_BUF, &constbuf);
si_set_constant_buffer(sctx, &sctx->rw_buffers,
SI_PS_CONST_SAMPLE_POSITIONS, &constbuf);
/* Smoothing (only possible with nr_samples == 1) uses the same
* sample locations as the MSAA it simulates.

1
src/gallium/drivers/radeonsi/si_state.h
View File

@ -180,6 +180,7 @@ enum {
SI_VS_CONST_CLIP_PLANES,
SI_PS_CONST_POLY_STIPPLE,
SI_PS_CONST_SAMPLE_POSITIONS,
SI_NUM_RW_BUFFERS,
};