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st/mesa: simplify drawpixels shader code with tgsi transform helper functions

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Reviewed-by: Charmaine Lee <charmainel@vmware.com>
This commit is contained in:
Brian Paul 2016-03-16 15:50:21 -06:00
parent 373910f4e7
commit 0f73c3ab25
1 changed files with 18 additions and 64 deletions
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82
src/mesa/state_tracker/st_cb_drawpixels_shader.c
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@ -72,8 +72,6 @@ transform_instr(struct tgsi_transform_context *tctx,
struct tgsi_full_instruction *current_inst)
{
struct tgsi_drawpix_transform *ctx = tgsi_drawpix_transform(tctx);
struct tgsi_full_declaration decl;
struct tgsi_full_instruction inst;
unsigned i, sem_texcoord = ctx->use_texcoord ? TGSI_SEMANTIC_TEXCOORD :
TGSI_SEMANTIC_GENERIC;
int texcoord_index = -1;
@ -86,33 +84,21 @@ transform_instr(struct tgsi_transform_context *tctx,
/* Add scale and bias constants. */
if (ctx->scale_and_bias) {
if (ctx->info.const_file_max[0] < (int)ctx->scale_const) {
decl = tgsi_default_full_declaration();
decl.Declaration.File = TGSI_FILE_CONSTANT;
decl.Range.First = decl.Range.Last = ctx->scale_const;
tctx->emit_declaration(tctx, &decl);
tgsi_transform_const_decl(tctx, ctx->scale_const, ctx->scale_const);
}
if (ctx->info.const_file_max[0] < (int)ctx->bias_const) {
decl = tgsi_default_full_declaration();
decl.Declaration.File = TGSI_FILE_CONSTANT;
decl.Range.First = decl.Range.Last = ctx->bias_const;
tctx->emit_declaration(tctx, &decl);
tgsi_transform_const_decl(tctx, ctx->bias_const, ctx->bias_const);
}
}
if (ctx->info.const_file_max[0] < (int)ctx->texcoord_const) {
decl = tgsi_default_full_declaration();
decl.Declaration.File = TGSI_FILE_CONSTANT;
decl.Range.First = decl.Range.Last = ctx->texcoord_const;
tctx->emit_declaration(tctx, &decl);
tgsi_transform_const_decl(tctx, ctx->texcoord_const, ctx->texcoord_const);
}
/* Add a new temp. */
ctx->color_temp = ctx->info.file_max[TGSI_FILE_TEMPORARY] + 1;
decl = tgsi_default_full_declaration();
decl.Declaration.File = TGSI_FILE_TEMPORARY;
decl.Range.First = decl.Range.Last = ctx->color_temp;
tctx->emit_declaration(tctx, &decl);
tgsi_transform_temp_decl(tctx, ctx->color_temp);
/* Add TEXCOORD[texcoord_slot] if it's missing. */
for (i = 0; i < ctx->info.num_inputs; i++) {
@ -124,75 +110,43 @@ transform_instr(struct tgsi_transform_context *tctx,
}
if (texcoord_index == -1) {
decl = tgsi_default_full_declaration();
decl.Declaration.File = TGSI_FILE_INPUT;
decl.Declaration.Semantic = 1;
decl.Semantic.Name = sem_texcoord;
decl.Declaration.Interpolate = 1;
decl.Interp.Interpolate = TGSI_INTERPOLATE_PERSPECTIVE;
decl.Range.First = decl.Range.Last = ctx->info.num_inputs;
texcoord_index = ctx->info.num_inputs;
tctx->emit_declaration(tctx, &decl);
tgsi_transform_input_decl(tctx, texcoord_index, sem_texcoord, 0,
TGSI_INTERPOLATE_PERSPECTIVE);
}
/* Declare the drawpix sampler if it's missing. */
if (!(ctx->info.samplers_declared & (1 << ctx->drawpix_sampler))) {
decl = tgsi_default_full_declaration();
decl.Declaration.File = TGSI_FILE_SAMPLER;
decl.Range.First = decl.Range.Last = ctx->drawpix_sampler;
tctx->emit_declaration(tctx, &decl);
tgsi_transform_sampler_decl(tctx, ctx->drawpix_sampler);
}
/* Declare the pixel map sampler if it's missing. */
if (ctx->pixel_maps &&
!(ctx->info.samplers_declared & (1 << ctx->pixelmap_sampler))) {
decl = tgsi_default_full_declaration();
decl.Declaration.File = TGSI_FILE_SAMPLER;
decl.Range.First = decl.Range.Last = ctx->pixelmap_sampler;
tctx->emit_declaration(tctx, &decl);
tgsi_transform_sampler_decl(tctx, ctx->pixelmap_sampler);
}
/* Get initial pixel color from the texture.
* TEX temp, fragment.texcoord[0], texture[0], 2D;
*/
inst = tgsi_default_full_instruction();
inst.Instruction.Opcode = TGSI_OPCODE_TEX;
inst.Instruction.Texture = 1;
inst.Texture.Texture = TGSI_TEXTURE_2D;
inst.Instruction.NumDstRegs = 1;
inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
inst.Dst[0].Register.Index = ctx->color_temp;
inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
inst.Instruction.NumSrcRegs = 2;
SET_SRC(&inst, 0, TGSI_FILE_INPUT, texcoord_index, X, Y, Z, W);
inst.Src[1].Register.File = TGSI_FILE_SAMPLER;
inst.Src[1].Register.Index = ctx->drawpix_sampler;
tctx->emit_instruction(tctx, &inst);
tgsi_transform_tex_2d_inst(tctx, TGSI_FILE_TEMPORARY, ctx->color_temp,
TGSI_FILE_INPUT, texcoord_index,
ctx->drawpix_sampler);
/* Apply the scale and bias. */
if (ctx->scale_and_bias) {
/* MAD temp, temp, scale, bias; */
inst = tgsi_default_full_instruction();
inst.Instruction.Opcode = TGSI_OPCODE_MAD;
inst.Instruction.NumDstRegs = 1;
inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
inst.Dst[0].Register.Index = ctx->color_temp;
inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
inst.Instruction.NumSrcRegs = 3;
SET_SRC(&inst, 0, TGSI_FILE_TEMPORARY, ctx->color_temp, X, Y, Z, W);
SET_SRC(&inst, 1, TGSI_FILE_CONSTANT, ctx->scale_const, X, Y, Z, W);
SET_SRC(&inst, 2, TGSI_FILE_CONSTANT, ctx->bias_const, X, Y, Z, W);
tctx->emit_instruction(tctx, &inst);
tgsi_transform_op3_inst(tctx, TGSI_OPCODE_MAD,
TGSI_FILE_TEMPORARY, ctx->color_temp,
TGSI_WRITEMASK_XYZW,
TGSI_FILE_TEMPORARY, ctx->color_temp,
TGSI_FILE_CONSTANT, ctx->scale_const,
TGSI_FILE_CONSTANT, ctx->bias_const);
}
if (ctx->pixel_maps) {
/* do four pixel map look-ups with two TEX instructions: */
struct tgsi_full_instruction inst;
/* TEX temp.xy, temp.xyyy, texture[1], 2D; */
inst = tgsi_default_full_instruction();