Declare fragment shader output registers.

diff --git a/src/mesa/pipe/tgsi/mesa/mesa_to_tgsi.c b/src/mesa/pipe/tgsi/mesa/mesa_to_tgsi.c
index c3201ec..690339b 100644 (file)
--- a/src/mesa/pipe/tgsi/mesa/mesa_to_tgsi.c
+++ b/src/mesa/pipe/tgsi/mesa/mesa_to_tgsi.c
@@ -1,7 +1,7 @@
 #include "tgsi_platform.h"\r
 #include "tgsi_mesa.h"\r
 \r
-#define TGSI_DEBUG 0\r
+#define TGSI_DEBUG 1\r
 \r
 /*\r
  * Map mesa register file to SBIR register file.\r
@@ -463,13 +463,37 @@ compile_instruction(
    return GL_FALSE;\r
 }\r
 \r
+static struct tgsi_full_declaration\r
+make_declaration(\r
+   GLuint file,\r
+   GLuint first,\r
+   GLuint last,\r
+   GLboolean do_interpolate,\r
+   GLuint interpolate )\r
+{\r
+   struct tgsi_full_declaration decl;\r
+\r
+   decl = tgsi_default_full_declaration();\r
+   decl.Declaration.File = file;\r
+   decl.Declaration.Declare = TGSI_DECLARE_RANGE;\r
+   decl.u.DeclarationRange.First = first;\r
+   decl.u.DeclarationRange.Last = last;\r
+\r
+   if( do_interpolate ) {\r
+      decl.Declaration.Interpolate = 1;\r
+      decl.Interpolation.Interpolate = interpolate;\r
+   }\r
+\r
+   return decl;\r
+}\r
+\r
 GLboolean\r
 tgsi_mesa_compile_fp_program(\r
    const struct gl_fragment_program *program,\r
    struct tgsi_token *tokens,\r
    GLuint maxTokens )\r
 {\r
-   GLuint i, ti;\r
+   GLuint i, ti, count;\r
    struct tgsi_header *header;\r
    struct tgsi_full_declaration fulldecl;\r
    struct tgsi_full_instruction fullinst;\r
@@ -486,53 +510,79 @@ tgsi_mesa_compile_fp_program(
    ti = 2;\r
 \r
    /*\r
-    * Input 0 is always read, at least implicitly by the instruction generated\r
-    * above, so mark it as used.\r
+    * Input 0 is always read, at least implicitly by the MOV instruction generated\r
+    * below, so mark it as used.\r
     */\r
    inputs_read = program->Base.InputsRead | 1;\r
 \r
    /*\r
-    * Declare input attributes.\r
+    * Declare input attributes. Note that we do not interpolate fragment position.\r
     */\r
-   fulldecl = tgsi_default_full_declaration();\r
-\r
-   fulldecl.Declaration.File = TGSI_FILE_INPUT;\r
-   fulldecl.Declaration.Declare = TGSI_DECLARE_RANGE;\r
-   fulldecl.Declaration.Interpolate = 1;\r
-\r
-   /*\r
-    * Do not interpolate fragment position.\r
-    */\r
-   fulldecl.u.DeclarationRange.First = 0;\r
-   fulldecl.u.DeclarationRange.Last = 0;\r
-\r
-   fulldecl.Interpolation.Interpolate = TGSI_INTERPOLATE_CONSTANT;\r
-\r
+   fulldecl = make_declaration(\r
+      TGSI_FILE_INPUT,\r
+      0,\r
+      0,\r
+      GL_TRUE,\r
+      TGSI_INTERPOLATE_CONSTANT );\r
    ti += tgsi_build_full_declaration(\r
       &fulldecl,\r
       &tokens[ti],\r
       header,\r
       maxTokens - ti );\r
 \r
-   /*\r
-    * Interpolate generic attributes.\r
-    */\r
-   fulldecl.u.DeclarationRange.First = 1;\r
-   fulldecl.u.DeclarationRange.Last = 1;\r
+   count = 0;\r
    for( i = 1; i < 32; i++ ) {\r
       if( inputs_read & (1 << i) ) {\r
-         fulldecl.u.DeclarationRange.Last++;\r
+         count++;\r
       }\r
    }\r
+   if( count > 0 ) {\r
+      fulldecl = make_declaration(\r
+         TGSI_FILE_INPUT,\r
+         1,\r
+         count + 1,\r
+         GL_TRUE,\r
+         TGSI_INTERPOLATE_LINEAR );\r
+      ti += tgsi_build_full_declaration(\r
+         &fulldecl,\r
+         &tokens[ti],\r
+         header,\r
+         maxTokens - ti );\r
+   }\r
 \r
-   fulldecl.Interpolation.Interpolate = TGSI_INTERPOLATE_LINEAR;\r
-\r
+   /*\r
+    * Declare output attributes.\r
+    */\r
+   assert(\r
+      program->Base.OutputsWritten ==\r
+      (program->Base.OutputsWritten & ((1 << FRAG_RESULT_COLR) | (1 << FRAG_RESULT_DEPR))) );\r
+\r
+   fulldecl = make_declaration(\r
+      TGSI_FILE_OUTPUT,\r
+      0,\r
+      0,\r
+      GL_FALSE,\r
+      0 );\r
    ti += tgsi_build_full_declaration(\r
       &fulldecl,\r
       &tokens[ti],\r
       header,\r
       maxTokens - ti );\r
 \r
+   if( program->Base.OutputsWritten & (1 << FRAG_RESULT_COLR) ) {\r
+      fulldecl = make_declaration(\r
+         TGSI_FILE_OUTPUT,\r
+         1,\r
+         1,\r
+         GL_FALSE,\r
+         0 );\r
+      ti += tgsi_build_full_declaration(\r
+         &fulldecl,\r
+         &tokens[ti],\r
+         header,\r
+         maxTokens - ti );\r
+   }\r
+\r
    /*\r
     * Copy input fragment xyz to output xyz.\r
     * If the shader writes depth, do not copy the z component.\r