From 776971218ef6c6749fcb882a95ae5fc3a1ff5059 Mon Sep 17 00:00:00 2001
From: Brian Paul <brianp@vmware.com>
Date: Fri, 20 Feb 2009 14:06:25 -0700
Subject: gallium: use the TGSI_TEXTURE_SHADOW1D/2D/RECT texture types for TEX
 instructions

These texture types were defined but never put to use.
For the time being though, the Mesa->TGSI translater isn't emitting these
targets.  See the XXX comment in map_texture_target().
---
 src/mesa/state_tracker/st_mesa_to_tgsi.c | 39 ++++++++++++++++++++++++--------
 1 file changed, 30 insertions(+), 9 deletions(-)

(limited to 'src/mesa/state_tracker')

diff --git a/src/mesa/state_tracker/st_mesa_to_tgsi.c b/src/mesa/state_tracker/st_mesa_to_tgsi.c
index 862d29fb1b..8ce0b20113 100644
--- a/src/mesa/state_tracker/st_mesa_to_tgsi.c
+++ b/src/mesa/state_tracker/st_mesa_to_tgsi.c
@@ -132,19 +132,35 @@ map_register_file_index(
  */
 static GLuint
 map_texture_target(
-   GLuint textarget )
+    GLuint textarget,
+    GLboolean shadow )
 {
+#if 1
+   /* XXX remove this line after we've checked that the rest of gallium
+    * can handle the TGSI_TEXTURE_SHADOWx tokens.
+    */
+   shadow = GL_FALSE;
+#endif
    switch( textarget ) {
    case TEXTURE_1D_INDEX:
-      return TGSI_TEXTURE_1D;
+      if (shadow)
+         return TGSI_TEXTURE_SHADOW1D;
+      else
+         return TGSI_TEXTURE_1D;
    case TEXTURE_2D_INDEX:
-      return TGSI_TEXTURE_2D;
+      if (shadow)
+         return TGSI_TEXTURE_SHADOW2D;
+      else
+         return TGSI_TEXTURE_2D;
    case TEXTURE_3D_INDEX:
       return TGSI_TEXTURE_3D;
    case TEXTURE_CUBE_INDEX:
       return TGSI_TEXTURE_CUBE;
    case TEXTURE_RECT_INDEX:
-      return TGSI_TEXTURE_RECT;
+      if (shadow)
+         return TGSI_TEXTURE_SHADOWRECT;
+      else
+         return TGSI_TEXTURE_RECT;
    default:
       assert( 0 );
    }
@@ -514,7 +530,8 @@ compile_instruction(
       /* ordinary texture lookup */
       fullinst->Instruction.Opcode = TGSI_OPCODE_TEX;
       fullinst->Instruction.NumSrcRegs = 2;
-      fullinst->InstructionExtTexture.Texture = map_texture_target( inst->TexSrcTarget );
+      fullinst->InstructionExtTexture.Texture =
+         map_texture_target( inst->TexSrcTarget, inst->TexShadow );
       fullinst->FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_SAMPLER;
       fullinst->FullSrcRegisters[1].SrcRegister.Index = inst->TexSrcUnit;
       break;
@@ -522,7 +539,8 @@ compile_instruction(
       /* texture lookup with LOD bias */
       fullinst->Instruction.Opcode = TGSI_OPCODE_TXB;
       fullinst->Instruction.NumSrcRegs = 2;
-      fullinst->InstructionExtTexture.Texture = map_texture_target( inst->TexSrcTarget );
+      fullinst->InstructionExtTexture.Texture =
+         map_texture_target( inst->TexSrcTarget, inst->TexShadow );
       fullinst->FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_SAMPLER;
       fullinst->FullSrcRegisters[1].SrcRegister.Index = inst->TexSrcUnit;
       break;
@@ -530,7 +548,8 @@ compile_instruction(
       /* texture lookup with explicit partial derivatives */
       fullinst->Instruction.Opcode = TGSI_OPCODE_TXD;
       fullinst->Instruction.NumSrcRegs = 4;
-      fullinst->InstructionExtTexture.Texture = map_texture_target( inst->TexSrcTarget );
+      fullinst->InstructionExtTexture.Texture =
+         map_texture_target( inst->TexSrcTarget, inst->TexShadow );
       /* src[0] = coord, src[1] = d[strq]/dx, src[2] = d[strq]/dy */
       fullinst->FullSrcRegisters[3].SrcRegister.File = TGSI_FILE_SAMPLER;
       fullinst->FullSrcRegisters[3].SrcRegister.Index = inst->TexSrcUnit;
@@ -539,7 +558,8 @@ compile_instruction(
       /* texture lookup with explicit LOD */
       fullinst->Instruction.Opcode = TGSI_OPCODE_TXL;
       fullinst->Instruction.NumSrcRegs = 2;
-      fullinst->InstructionExtTexture.Texture = map_texture_target( inst->TexSrcTarget );
+      fullinst->InstructionExtTexture.Texture =
+         map_texture_target( inst->TexSrcTarget, inst->TexShadow );
       fullinst->FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_SAMPLER;
       fullinst->FullSrcRegisters[1].SrcRegister.Index = inst->TexSrcUnit;
       break;
@@ -548,7 +568,8 @@ compile_instruction(
       /* convert to TEX w/ special flag for division */
       fullinst->Instruction.Opcode = TGSI_OPCODE_TXP;
       fullinst->Instruction.NumSrcRegs = 2;
-      fullinst->InstructionExtTexture.Texture = map_texture_target( inst->TexSrcTarget );
+      fullinst->InstructionExtTexture.Texture =
+         map_texture_target( inst->TexSrcTarget, inst->TexShadow );
       fullinst->FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_SAMPLER;
       fullinst->FullSrcRegisters[1].SrcRegister.Index = inst->TexSrcUnit;
       break;
-- 
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