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-rw-r--r--src/gallium/auxiliary/tgsi/tgsi_scan.c49
-rw-r--r--src/gallium/auxiliary/tgsi/tgsi_scan.h3
2 files changed, 37 insertions, 15 deletions
diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.c b/src/gallium/auxiliary/tgsi/tgsi_scan.c
index be4870a4983..cfc7ea8e898 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.c
@@ -2,6 +2,7 @@
*
* Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
+ * Copyright 2008 VMware, Inc. All rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
@@ -79,38 +80,61 @@ tgsi_scan_shader(const struct tgsi_token *tokens,
switch( parse.FullToken.Token.Type ) {
case TGSI_TOKEN_TYPE_INSTRUCTION:
{
- struct tgsi_full_instruction *fullinst
+ const struct tgsi_full_instruction *fullinst
= &parse.FullToken.FullInstruction;
assert(fullinst->Instruction.Opcode < TGSI_OPCODE_LAST);
info->opcode_count[fullinst->Instruction.Opcode]++;
+
+ /* special case: scan fragment shaders for use of the fog
+ * input/attribute. The X component is fog, the Y component
+ * is the front/back-face flag.
+ */
+ if (procType == TGSI_PROCESSOR_FRAGMENT) {
+ uint i;
+ for (i = 0; i < fullinst->Instruction.NumSrcRegs; i++) {
+ const struct tgsi_full_src_register *src =
+ &fullinst->FullSrcRegisters[i];
+ if (src->SrcRegister.File == TGSI_FILE_INPUT) {
+ const int ind = src->SrcRegister.Index;
+ if (info->input_semantic_name[ind] == TGSI_SEMANTIC_FOG) {
+ if (src->SrcRegister.SwizzleX == TGSI_SWIZZLE_X) {
+ info->uses_fogcoord = TRUE;
+ }
+ else if (src->SrcRegister.SwizzleX == TGSI_SWIZZLE_Y) {
+ info->uses_frontfacing = TRUE;
+ }
+ }
+ }
+ }
+ }
}
break;
case TGSI_TOKEN_TYPE_DECLARATION:
{
- struct tgsi_full_declaration *fulldecl
+ const struct tgsi_full_declaration *fulldecl
= &parse.FullToken.FullDeclaration;
uint file = fulldecl->Declaration.File;
- uint i;
- for (i = fulldecl->DeclarationRange.First;
- i <= fulldecl->DeclarationRange.Last;
- i++) {
+ uint reg;
+ for (reg = fulldecl->DeclarationRange.First;
+ reg <= fulldecl->DeclarationRange.Last;
+ reg++) {
/* only first 32 regs will appear in this bitfield */
- info->file_mask[file] |= (1 << i);
+ info->file_mask[file] |= (1 << reg);
info->file_count[file]++;
info->file_max[file] = MAX2(info->file_max[file], (int)i);
if (file == TGSI_FILE_INPUT) {
- info->input_semantic_name[i] = (ubyte)fulldecl->Semantic.SemanticName;
- info->input_semantic_index[i] = (ubyte)fulldecl->Semantic.SemanticIndex;
+ info->input_semantic_name[reg] = (ubyte)fulldecl->Semantic.SemanticName;
+ info->input_semantic_index[reg] = (ubyte)fulldecl->Semantic.SemanticIndex;
info->num_inputs++;
}
if (file == TGSI_FILE_OUTPUT) {
- info->output_semantic_name[i] = (ubyte)fulldecl->Semantic.SemanticName;
- info->output_semantic_index[i] = (ubyte)fulldecl->Semantic.SemanticIndex;
+ info->output_semantic_name[reg] = (ubyte)fulldecl->Semantic.SemanticName;
+ info->output_semantic_index[reg] = (ubyte)fulldecl->Semantic.SemanticIndex;
info->num_outputs++;
}
@@ -133,9 +157,6 @@ tgsi_scan_shader(const struct tgsi_token *tokens,
}
}
- assert( info->file_max[TGSI_FILE_INPUT] + 1 == info->num_inputs );
- assert( info->file_max[TGSI_FILE_OUTPUT] + 1 == info->num_outputs );
-
info->uses_kill = (info->opcode_count[TGSI_OPCODE_KIL] ||
info->opcode_count[TGSI_OPCODE_KILP]);
diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.h b/src/gallium/auxiliary/tgsi/tgsi_scan.h
index 5cb6efb3439..2c1a75bc812 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.h
@@ -41,7 +41,6 @@ struct tgsi_shader_info
{
uint num_tokens;
- /* XXX eventually remove the corresponding fields from pipe_shader_state: */
ubyte num_inputs;
ubyte num_outputs;
ubyte input_semantic_name[PIPE_MAX_SHADER_INPUTS]; /**< TGSI_SEMANTIC_x */
@@ -59,6 +58,8 @@ struct tgsi_shader_info
boolean writes_z; /**< does fragment shader write Z value? */
boolean uses_kill; /**< KIL or KILP instruction used? */
+ boolean uses_fogcoord; /**< fragment shader uses fog coord? */
+ boolean uses_frontfacing; /**< fragment shader uses front/back-face flag? */
};