[Mesa-dev] [PATCH 1/2] gallium/tgsi: Redefine the TGSI_TEXTURE_UNKNOWN texture target.

[jfonseca at vmware.com]

From: José Fonseca <jfonseca at vmware.com>

Some code relies on the existing of an invalid texture target. It seems
safer to bring it back than to deal with unintended consequences.

This partially reverts commit a4ebb04214bab1cd9bd41967232ec89441e31744.
---
 src/gallium/auxiliary/tgsi/tgsi_build.c            |    2 +-
 src/gallium/auxiliary/tgsi/tgsi_strings.c          |    3 ++-
 src/gallium/auxiliary/util/u_blitter.c             |    2 +-
 .../drivers/nv50/codegen/nv50_ir_from_tgsi.cpp     |    2 ++
 src/gallium/include/pipe/p_shader_tokens.h         |    3 ++-
 5 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/gallium/auxiliary/tgsi/tgsi_build.c b/src/gallium/auxiliary/tgsi/tgsi_build.c
index 1d3c4bc..869faa1 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_build.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_build.c
@@ -707,7 +707,7 @@ tgsi_default_instruction_texture( void )
 {
    struct tgsi_instruction_texture instruction_texture;
 
-   instruction_texture.Texture = TGSI_BUFFER;
+   instruction_texture.Texture = TGSI_TEXTURE_UNKNOWN;
    instruction_texture.NumOffsets = 0;
    instruction_texture.Padding = 0;
 
diff --git a/src/gallium/auxiliary/tgsi/tgsi_strings.c b/src/gallium/auxiliary/tgsi/tgsi_strings.c
index d7b74ba..b5fd1fc 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_strings.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_strings.c
@@ -96,7 +96,8 @@ const char *tgsi_texture_names[TGSI_TEXTURE_COUNT] =
    "2DARRAY",
    "SHADOW1DARRAY",
    "SHADOW2DARRAY",
-   "SHADOWCUBE"
+   "SHADOWCUBE",
+   "UNKNOWN"
 };
 
 const char *tgsi_property_names[TGSI_PROPERTY_COUNT] =
diff --git a/src/gallium/auxiliary/util/u_blitter.c b/src/gallium/auxiliary/util/u_blitter.c
index 28e7383..d0b9187 100644
--- a/src/gallium/auxiliary/util/u_blitter.c
+++ b/src/gallium/auxiliary/util/u_blitter.c
@@ -674,7 +674,7 @@ pipe_tex_to_tgsi_tex(enum pipe_texture_target pipe_tex_target)
       return TGSI_TEXTURE_2D_ARRAY;
    default:
       assert(0 && "unexpected texture target");
-      return 0;
+      return TGSI_TEXTURE_UNKNOWN;
    }
 }
 
diff --git a/src/gallium/drivers/nv50/codegen/nv50_ir_from_tgsi.cpp b/src/gallium/drivers/nv50/codegen/nv50_ir_from_tgsi.cpp
index 955eb92..ba08493 100644
--- a/src/gallium/drivers/nv50/codegen/nv50_ir_from_tgsi.cpp
+++ b/src/gallium/drivers/nv50/codegen/nv50_ir_from_tgsi.cpp
@@ -349,6 +349,8 @@ static nv50_ir::TexTarget translateTexture(uint tex)
    NV50_IR_TEX_TARG_CASE(SHADOWRECT, RECT_SHADOW);
    case TGSI_BUFFER:
       return nv50_ir::TEX_TARGET_BUFFER;
+
+   case TGSI_TEXTURE_UNKNOWN:
    default:
       assert(!"invalid texture target");
       return nv50_ir::TEX_TARGET_2D;
diff --git a/src/gallium/include/pipe/p_shader_tokens.h b/src/gallium/include/pipe/p_shader_tokens.h
index 5325e43..615a89a 100644
--- a/src/gallium/include/pipe/p_shader_tokens.h
+++ b/src/gallium/include/pipe/p_shader_tokens.h
@@ -504,7 +504,8 @@ struct tgsi_instruction_label
 #define TGSI_TEXTURE_SHADOW1D_ARRAY 11
 #define TGSI_TEXTURE_SHADOW2D_ARRAY 12
 #define TGSI_TEXTURE_SHADOWCUBE     13
-#define TGSI_TEXTURE_COUNT          14
+#define TGSI_TEXTURE_UNKNOWN        14
+#define TGSI_TEXTURE_COUNT          15
 
 struct tgsi_instruction_texture
 {
-- 
1.7.9.1