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gallium: added util_make_fragment_passthrough_shader()

This commit is contained in:
Brian 2008-03-20 09:11:27 -06:00
parent a88202d3b0
commit 6a9a3afcf9
2 changed files with 107 additions and 0 deletions
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95
src/gallium/auxiliary/util/u_simple_shaders.c
View File

@ -261,3 +261,98 @@ util_make_fragment_tex_shader(struct pipe_context *pipe)
return pipe->create_fs_state(pipe, &shader);
}
/**
* Make simple fragment color pass-through shader.
*/
void *
util_make_fragment_passthrough_shader(struct pipe_context *pipe)
{
uint maxTokens = 40;
struct tgsi_token *tokens;
struct tgsi_header *header;
struct tgsi_processor *processor;
struct tgsi_full_declaration decl;
struct tgsi_full_instruction inst;
const uint procType = TGSI_PROCESSOR_FRAGMENT;
uint ti, i;
struct pipe_shader_state shader;
tokens = (struct tgsi_token *) malloc(maxTokens * sizeof(tokens[0]));
/* shader header
*/
*(struct tgsi_version *) &tokens[0] = tgsi_build_version();
header = (struct tgsi_header *) &tokens[1];
*header = tgsi_build_header();
processor = (struct tgsi_processor *) &tokens[2];
*processor = tgsi_build_processor( procType, header );
ti = 3;
/* declare input */
decl = tgsi_default_full_declaration();
decl.Declaration.File = TGSI_FILE_INPUT;
decl.Declaration.Semantic = 1;
decl.Semantic.SemanticName = TGSI_SEMANTIC_COLOR;
decl.Semantic.SemanticIndex = 0;
decl.u.DeclarationRange.First =
decl.u.DeclarationRange.Last = 0;
ti += tgsi_build_full_declaration(&decl,
&tokens[ti],
header,
maxTokens - ti);
/* declare output */
decl = tgsi_default_full_declaration();
decl.Declaration.File = TGSI_FILE_OUTPUT;
decl.Declaration.Semantic = 1;
decl.Semantic.SemanticName = TGSI_SEMANTIC_COLOR;
decl.Semantic.SemanticIndex = 0;
decl.u.DeclarationRange.First =
decl.u.DeclarationRange.Last = 0;
ti += tgsi_build_full_declaration(&decl,
&tokens[ti],
header,
maxTokens - ti);
/* MOVE out[0], in[0]; */
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_INPUT;
inst.FullSrcRegisters[0].SrcRegister.Index = 0;
ti += tgsi_build_full_instruction(&inst,
&tokens[ti],
header,
maxTokens - ti );
/* END instruction */
inst = tgsi_default_full_instruction();
inst.Instruction.Opcode = TGSI_OPCODE_END;
inst.Instruction.NumDstRegs = 0;
inst.Instruction.NumSrcRegs = 0;
ti += tgsi_build_full_instruction(&inst,
&tokens[ti],
header,
maxTokens - ti );
assert(ti < maxTokens);
#if 0 /*debug*/
tgsi_dump(tokens, 0);
#endif
shader.tokens = tokens;
return pipe->create_fs_state(pipe, &shader);
}

12
src/gallium/auxiliary/util/u_simple_shaders.h
View File

@ -36,6 +36,11 @@
struct pipe_context;
#ifdef __cplusplus
extern "C" {
#endif
extern void *
util_make_vertex_passthrough_shader(struct pipe_context *pipe,
uint num_attribs,
@ -47,6 +52,13 @@ extern void *
util_make_fragment_tex_shader(struct pipe_context *pipe);
extern void *
util_make_fragment_passthrough_shader(struct pipe_context *pipe);
#ifdef __cplusplus
}
#endif
#endif