ir_variable: Set locations for shader built-in variables

2 files changed, 65 insertions, 55 deletions

diff --git a/builtin_variables.h b/builtin_variables.h
index b405b46..77f2fe5 100644
--- a/builtin_variables.h
+++ b/builtin_variables.h
@@ -21,70 +21,73 @@
  * DEALINGS IN THE SOFTWARE.
  */
 
+#include "main/mtypes.h"
+
 struct builtin_variable {
    enum ir_variable_mode mode;
+   int slot;
    const char *type;
    const char *name;
 };
 
 static const builtin_variable builtin_core_vs_variables[] = {
-   { ir_var_out, "vec4",  "gl_Position" },
-   { ir_var_out, "float", "gl_PointSize" },
+   { ir_var_out, VERT_RESULT_HPOS, "vec4",  "gl_Position" },
+   { ir_var_out, VERT_RESULT_PSIZ, "float", "gl_PointSize" },
 };
 
 static const builtin_variable builtin_core_fs_variables[] = {
-   { ir_var_in, "vec4",  "gl_FragCoord" },
-   { ir_var_in, "bool",  "gl_FrontFacing" },
-   { ir_var_out, "vec4",  "gl_FragColor" },
-   { ir_var_out, "float", "gl_FragDepth" },
+   { ir_var_in,  FRAG_ATTRIB_WPOS,  "vec4",  "gl_FragCoord" },
+   { ir_var_in,  FRAG_ATTRIB_FACE,  "bool",  "gl_FrontFacing" },
+   { ir_var_out, FRAG_RESULT_COLOR, "vec4",  "gl_FragColor" },
+   { ir_var_out, FRAG_RESULT_DEPTH, "float", "gl_FragDepth" },
 };
 
 static const builtin_variable builtin_110_deprecated_fs_variables[] = {
-   { ir_var_in,  "vec4",  "gl_Color" },
-   { ir_var_in,  "vec4",  "gl_SecondaryColor" },
-   { ir_var_in,  "float", "gl_FogFragCoord" },
+   { ir_var_in,  FRAG_ATTRIB_COL0,  "vec4",  "gl_Color" },
+   { ir_var_in,  FRAG_ATTRIB_COL1,  "vec4",  "gl_SecondaryColor" },
+   { ir_var_in,  FRAG_ATTRIB_FOGC,  "float", "gl_FogFragCoord" },
 };
 
 static const builtin_variable builtin_110_deprecated_vs_variables[] = {
-   { ir_var_in,  "vec4",  "gl_Vertex" },
-   { ir_var_in,  "vec3",  "gl_Normal" },
-   { ir_var_in,  "vec4",  "gl_Color" },
-   { ir_var_in,  "vec4",  "gl_SecondaryColor" },
-   { ir_var_in,  "vec4",  "gl_MultiTexCoord0" },
-   { ir_var_in,  "vec4",  "gl_MultiTexCoord1" },
-   { ir_var_in,  "vec4",  "gl_MultiTexCoord2" },
-   { ir_var_in,  "vec4",  "gl_MultiTexCoord3" },
-   { ir_var_in,  "vec4",  "gl_MultiTexCoord4" },
-   { ir_var_in,  "vec4",  "gl_MultiTexCoord5" },
-   { ir_var_in,  "vec4",  "gl_MultiTexCoord6" },
-   { ir_var_in,  "vec4",  "gl_MultiTexCoord7" },
-   { ir_var_in,  "float", "gl_FogCoord" },
-   { ir_var_out, "vec4",  "gl_ClipVertex" },
-   { ir_var_out, "vec4",  "gl_FrontColor" },
-   { ir_var_out, "vec4",  "gl_BackColor" },
-   { ir_var_out, "vec4",  "gl_FrontSecondaryColor" },
-   { ir_var_out, "vec4",  "gl_BackSecondaryColor" },
-   { ir_var_out, "float", "gl_FogFragCoord" },
+   { ir_var_in,  VERT_ATTRIB_POS,    "vec4",  "gl_Vertex" },
+   { ir_var_in,  VERT_ATTRIB_NORMAL, "vec3",  "gl_Normal" },
+   { ir_var_in,  VERT_ATTRIB_COLOR0, "vec4",  "gl_Color" },
+   { ir_var_in,  VERT_ATTRIB_COLOR1, "vec4",  "gl_SecondaryColor" },
+   { ir_var_in,  VERT_ATTRIB_TEX0,   "vec4",  "gl_MultiTexCoord0" },
+   { ir_var_in,  VERT_ATTRIB_TEX1,   "vec4",  "gl_MultiTexCoord1" },
+   { ir_var_in,  VERT_ATTRIB_TEX2,   "vec4",  "gl_MultiTexCoord2" },
+   { ir_var_in,  VERT_ATTRIB_TEX3,   "vec4",  "gl_MultiTexCoord3" },
+   { ir_var_in,  VERT_ATTRIB_TEX4,   "vec4",  "gl_MultiTexCoord4" },
+   { ir_var_in,  VERT_ATTRIB_TEX5,   "vec4",  "gl_MultiTexCoord5" },
+   { ir_var_in,  VERT_ATTRIB_TEX6,   "vec4",  "gl_MultiTexCoord6" },
+   { ir_var_in,  VERT_ATTRIB_TEX7,   "vec4",  "gl_MultiTexCoord7" },
+   { ir_var_in,  VERT_ATTRIB_FOG,    "float", "gl_FogCoord" },
+   { ir_var_out, VERT_RESULT_HPOS,   "vec4",  "gl_ClipVertex" },
+   { ir_var_out, VERT_RESULT_COL0,   "vec4",  "gl_FrontColor" },
+   { ir_var_out, VERT_RESULT_BFC0,   "vec4",  "gl_BackColor" },
+   { ir_var_out, VERT_RESULT_COL1,   "vec4",  "gl_FrontSecondaryColor" },
+   { ir_var_out, VERT_RESULT_BFC1,   "vec4",  "gl_BackSecondaryColor" },
+   { ir_var_out, VERT_RESULT_FOGC,   "float", "gl_FogFragCoord" },
 };
 
 static const builtin_variable builtin_130_vs_variables[] = {
-   { ir_var_in,  "int",   "gl_VertexID" },
+   { ir_var_in,  -1,                 "int",   "gl_VertexID" },
 };
 
 static const builtin_variable builtin_110_deprecated_uniforms[] = {
-   { ir_var_uniform, "mat4", "gl_ModelViewMatrix" },
-   { ir_var_uniform, "mat4", "gl_ProjectionMatrix" },
-   { ir_var_uniform, "mat4", "gl_ModelViewProjectionMatrix" },
-   { ir_var_uniform, "mat3", "gl_NormalMatrix" },
-   { ir_var_uniform, "mat4", "gl_ModelViewMatrixInverse" },
-   { ir_var_uniform, "mat4", "gl_ProjectionMatrixInverse" },
-   { ir_var_uniform, "mat4", "gl_ModelViewProjectionMatrixInverse" },
-   { ir_var_uniform, "mat4", "gl_ModelViewMatrixTranspose" },
-   { ir_var_uniform, "mat4", "gl_ProjectionMatrixTranspose" },
-   { ir_var_uniform, "mat4", "gl_ModelViewProjectionMatrixTranspose" },
-   { ir_var_uniform, "mat4", "gl_ModelViewMatrixInverseTranspose" },
-   { ir_var_uniform, "mat4", "gl_ProjectionMatrixInverseTranspose" },
-   { ir_var_uniform, "mat4", "gl_ModelViewProjectionMatrixInverseTranspose" },
-   { ir_var_uniform, "float", "gl_NormalScale" },
+   { ir_var_uniform, -1, "mat4", "gl_ModelViewMatrix" },
+   { ir_var_uniform, -1, "mat4", "gl_ProjectionMatrix" },
+   { ir_var_uniform, -1, "mat4", "gl_ModelViewProjectionMatrix" },
+   { ir_var_uniform, -1, "mat3", "gl_NormalMatrix" },
+   { ir_var_uniform, -1, "mat4", "gl_ModelViewMatrixInverse" },
+   { ir_var_uniform, -1, "mat4", "gl_ProjectionMatrixInverse" },
+   { ir_var_uniform, -1, "mat4", "gl_ModelViewProjectionMatrixInverse" },
+   { ir_var_uniform, -1, "mat4", "gl_ModelViewMatrixTranspose" },
+   { ir_var_uniform, -1, "mat4", "gl_ProjectionMatrixTranspose" },
+   { ir_var_uniform, -1, "mat4", "gl_ModelViewProjectionMatrixTranspose" },
+   { ir_var_uniform, -1, "mat4", "gl_ModelViewMatrixInverseTranspose" },
+   { ir_var_uniform, -1, "mat4", "gl_ProjectionMatrixInverseTranspose" },
+   { ir_var_uniform, -1, "mat4", "gl_ModelViewProjectionMatrixInverseTranspose" },
+   { ir_var_uniform, -1, "float", "gl_NormalScale" },
 };
 
diff --git a/ir_variable.cpp b/ir_variable.cpp
index 49d8e3d..efebe91 100644
--- a/ir_variable.cpp
+++ b/ir_variable.cpp
@@ -31,7 +31,7 @@
 #endif
 
 static ir_variable *
-add_variable(const char *name, enum ir_variable_mode mode,
+add_variable(const char *name, enum ir_variable_mode mode, int slot,
 	     const glsl_type *type, exec_list *instructions,
 		     glsl_symbol_table *symtab)
 {
@@ -59,6 +59,8 @@ add_variable(const char *name, enum ir_variable_mode mode,
       break;
    }
 
+   var->location = slot;
+
    /* Once the variable is created an initialized, add it to the symbol table
     * and add the declaration to the IR stream.
     */
@@ -80,7 +82,8 @@ add_builtin_variable(const builtin_variable *proto, exec_list *instructions,
 
    assert(type != NULL);
 
-   add_variable(proto->name, proto->mode, type, instructions, symtab);
+   add_variable(proto->name, proto->mode, proto->slot, type, instructions,
+		symtab);
 }
 
 
@@ -103,7 +106,7 @@ generate_110_uniforms(exec_list *instructions,
    const glsl_type *const mat4_array_type =
       glsl_type::get_array_instance(glsl_type::mat4_type, 4);
 
-   add_variable("gl_TextureMatrix", ir_var_uniform, mat4_array_type,
+   add_variable("gl_TextureMatrix", ir_var_uniform, -1, mat4_array_type,
 		instructions, symtab);
 
    /* FINISHME: Add support for gl_DepthRangeParameters */
@@ -121,7 +124,7 @@ generate_110_uniforms(exec_list *instructions,
    const glsl_type *const light_source_array_type =
       glsl_type::get_array_instance(symtab->get_type("gl_LightSourceParameters"), 8);
 
-   add_variable("gl_LightSource", ir_var_uniform, light_source_array_type,
+   add_variable("gl_LightSource", ir_var_uniform, -1, light_source_array_type,
 		instructions, symtab);
 
    /* FINISHME: Add support for gl_LightModel */
@@ -156,8 +159,8 @@ generate_110_vs_variables(exec_list *instructions,
    const glsl_type *const vec4_array_type =
       glsl_type::get_array_instance(glsl_type::vec4_type, 4);
 
-   add_variable("gl_TexCoord", ir_var_out, vec4_array_type, instructions,
-		symtab);
+   add_variable("gl_TexCoord", ir_var_out, VERT_RESULT_TEX0, vec4_array_type,
+		instructions, symtab);
 }
 
 
@@ -188,7 +191,9 @@ generate_130_vs_variables(exec_list *instructions,
     */
    const glsl_type *const clip_distance_array_type =
       glsl_type::get_array_instance(glsl_type::float_type, 8);
-   add_variable("gl_ClipDistance", ir_var_out, clip_distance_array_type,
+
+   /* FINISHME: gl_ClipDistance needs a real location assigned. */
+   add_variable("gl_ClipDistance", ir_var_out, -1, clip_distance_array_type,
 		instructions, symtab);
 
 }
@@ -237,8 +242,8 @@ generate_110_fs_variables(exec_list *instructions,
    const glsl_type *const vec4_array_type =
       glsl_type::get_array_instance(glsl_type::vec4_type, 4);
 
-   add_variable("gl_TexCoord", ir_var_in, vec4_array_type, instructions,
-		symtab);
+   add_variable("gl_TexCoord", ir_var_in, FRAG_ATTRIB_TEX0, vec4_array_type,
+		instructions, symtab);
 }
 
 
@@ -254,8 +259,8 @@ generate_ARB_draw_buffers_fs_variables(exec_list *instructions,
       glsl_type::get_array_instance(glsl_type::vec4_type, 1);
 
    ir_variable *const fd =
-      add_variable("gl_FragData", ir_var_out, vec4_array_type, instructions,
-		   symtab);
+      add_variable("gl_FragData", ir_var_out, FRAG_RESULT_DATA0,
+		   vec4_array_type, instructions, symtab);
 
    if (warn)
       fd->warn_extension = "GL_ARB_draw_buffers";
@@ -281,7 +286,9 @@ generate_130_fs_variables(exec_list *instructions,
     */
    const glsl_type *const clip_distance_array_type =
       glsl_type::get_array_instance(glsl_type::float_type, 8);
-   add_variable("gl_ClipDistance", ir_var_in, clip_distance_array_type,
+
+   /* FINISHME: gl_ClipDistance needs a real location assigned. */
+   add_variable("gl_ClipDistance", ir_var_in, -1, clip_distance_array_type,
 		instructions, symtab);
 }