diff options
| author | Keith Whitwell <[email protected]> | 2009-09-02 17:58:52 +0100 |
|---|---|---|
| committer | Keith Whitwell <[email protected]> | 2009-09-02 18:31:48 +0100 |
| commit | de343680a3e6b2a588f8b3c844828b8d9e6cb6a5 (patch) | |
| tree | 93365ebe884d2cf7d384ae2a15deead43c9d85be /src/gallium/auxiliary/util/u_simple_shaders.c | |
| parent | 1d7a989b104f02042fadfeec5bd20654bbb6fea6 (diff) | |
util: add version of u_blit_pixels which takes a writemask
Values outside the writemask are set in the destination to {0,0,0,1}
Diffstat (limited to 'src/gallium/auxiliary/util/u_simple_shaders.c')
| -rw-r--r-- | src/gallium/auxiliary/util/u_simple_shaders.c | 45 |
1 files changed, 43 insertions, 2 deletions
diff --git a/src/gallium/auxiliary/util/u_simple_shaders.c b/src/gallium/auxiliary/util/u_simple_shaders.c index e519c354d25..acc5b83c622 100644 --- a/src/gallium/auxiliary/util/u_simple_shaders.c +++ b/src/gallium/auxiliary/util/u_simple_shaders.c @@ -152,11 +152,14 @@ util_make_vertex_passthrough_shader(struct pipe_context *pipe, /** * Make simple fragment texture shader: - * TEX OUT[0], IN[0], SAMP[0], 2D; + * IMM {0,0,0,1} // (if writemask != 0xf) + * MOV OUT[0], IMM[0] // (if writemask != 0xf) + * TEX OUT[0].writemask, IN[0], SAMP[0], 2D; * END; */ void * -util_make_fragment_tex_shader(struct pipe_context *pipe) +util_make_fragment_tex_shader_writemask(struct pipe_context *pipe, + unsigned writemask ) { struct pipe_shader_state shader; struct tgsi_token tokens[100]; @@ -217,12 +220,43 @@ util_make_fragment_tex_shader(struct pipe_context *pipe) header, Elements(tokens) - ti); + + if (writemask != TGSI_WRITEMASK_XYZW) { + struct tgsi_full_immediate imm; + static const float value[4] = { 0, 0, 0, 1 }; + + imm = tgsi_default_full_immediate(); + imm.Immediate.NrTokens += 4; + imm.Immediate.DataType = TGSI_IMM_FLOAT32; + imm.u.Pointer = value; + + ti += tgsi_build_full_immediate(&imm, + &tokens[ti], + header, + Elements(tokens) - ti ); + + /* MOV instruction */ + inst = tgsi_default_full_instruction(); + inst.Instruction.Opcode = TGSI_OPCODE_MOV; + inst.Instruction.NumDstRegs = 1; + inst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_OUTPUT; + inst.FullDstRegisters[0].DstRegister.Index = 0; + inst.Instruction.NumSrcRegs = 1; + inst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_IMMEDIATE; + inst.FullSrcRegisters[0].SrcRegister.Index = 0; + ti += tgsi_build_full_instruction(&inst, + &tokens[ti], + header, + Elements(tokens) - ti ); + } + /* TEX instruction */ inst = tgsi_default_full_instruction(); inst.Instruction.Opcode = TGSI_OPCODE_TEX; inst.Instruction.NumDstRegs = 1; inst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_OUTPUT; inst.FullDstRegisters[0].DstRegister.Index = 0; + inst.FullDstRegisters[0].DstRegister.WriteMask = writemask; inst.Instruction.NumSrcRegs = 2; inst.InstructionExtTexture.Texture = TGSI_TEXTURE_2D; inst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_INPUT; @@ -253,6 +287,13 @@ util_make_fragment_tex_shader(struct pipe_context *pipe) return pipe->create_fs_state(pipe, &shader); } +void * +util_make_fragment_tex_shader(struct pipe_context *pipe ) +{ + return util_make_fragment_tex_shader_writemask( pipe, + TGSI_WRITEMASK_XYZW ); +} + |