svn merge ^/branches/released .

1 files changed, 493 insertions, 0 deletions

diff --git a/mesalib/src/glsl/ir_variable.cpp b/mesalib/src/glsl/ir_variable.cpp
new file mode 100644
index 000000000..1eff740ef
--- /dev/null
+++ b/mesalib/src/glsl/ir_variable.cpp
@@ -0,0 +1,493 @@
+/*
+ * Copyright © 2010 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include "ir.h"
+#include "glsl_parser_extras.h"
+#include "glsl_symbol_table.h"
+#include "builtin_variables.h"
+
+static void generate_ARB_draw_buffers_variables(exec_list *,
+						struct _mesa_glsl_parse_state *,
+						bool, _mesa_glsl_parser_targets);
+
+static ir_variable *
+add_variable(const char *name, enum ir_variable_mode mode, int slot,
+	     const glsl_type *type, exec_list *instructions,
+		     glsl_symbol_table *symtab)
+{
+   ir_variable *var = new(symtab) ir_variable(type, name, mode);
+
+   switch (var->mode) {
+   case ir_var_auto:
+   case ir_var_in:
+   case ir_var_uniform:
+      var->read_only = true;
+      break;
+   case ir_var_inout:
+   case ir_var_out:
+      break;
+   default:
+      assert(0);
+      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.
+    */
+   instructions->push_tail(var);
+
+   symtab->add_variable(var->name, var);
+   return var;
+}
+
+static ir_variable *
+add_uniform(exec_list *instructions,
+	    struct _mesa_glsl_parse_state *state,
+	    const char *name, const glsl_type *type)
+{
+   return add_variable(name, ir_var_uniform, -1, type, instructions,
+		       state->symbols);
+}
+
+static void
+add_builtin_variable(const builtin_variable *proto, exec_list *instructions,
+		     glsl_symbol_table *symtab)
+{
+   /* Create a new variable declaration from the description supplied by
+    * the caller.
+    */
+   const glsl_type *const type = symtab->get_type(proto->type);
+
+   assert(type != NULL);
+
+   add_variable(proto->name, proto->mode, proto->slot, type, instructions,
+		symtab);
+}
+
+static void
+add_builtin_constant(exec_list *instructions,
+		     struct _mesa_glsl_parse_state *state,
+		     const char *name, int value)
+{
+   ir_variable *const var = add_variable(name, ir_var_auto,
+					 -1, glsl_type::int_type,
+					 instructions, state->symbols);
+   var->constant_value = new(var) ir_constant(value);
+}
+
+/* Several constants in GLSL ES have different names than normal desktop GLSL.
+ * Therefore, this function should only be called on the ES path.
+ */
+static void
+generate_100ES_uniforms(exec_list *instructions,
+		     struct _mesa_glsl_parse_state *state)
+{
+   add_builtin_constant(instructions, state, "gl_MaxVertexAttribs",
+			state->Const.MaxVertexAttribs);
+   add_builtin_constant(instructions, state, "gl_MaxVertexUniformVectors",
+			state->Const.MaxVertexUniformComponents);
+   add_builtin_constant(instructions, state, "gl_MaxVaryingVectors",
+			state->Const.MaxVaryingFloats / 4);
+   add_builtin_constant(instructions, state, "gl_MaxVertexTextureImageUnits",
+			state->Const.MaxVertexTextureImageUnits);
+   add_builtin_constant(instructions, state, "gl_MaxCombinedTextureImageUnits",
+			state->Const.MaxCombinedTextureImageUnits);
+   add_builtin_constant(instructions, state, "gl_MaxTextureImageUnits",
+			state->Const.MaxTextureImageUnits);
+   add_builtin_constant(instructions, state, "gl_MaxFragmentUniformVectors",
+			state->Const.MaxFragmentUniformComponents);
+
+   add_uniform(instructions, state, "gl_DepthRange",
+	       state->symbols->get_type("gl_DepthRangeParameters"));
+}
+
+static void
+generate_110_uniforms(exec_list *instructions,
+		      struct _mesa_glsl_parse_state *state)
+{
+   for (unsigned i = 0
+	   ; i < Elements(builtin_110_deprecated_uniforms)
+	   ; i++) {
+      add_builtin_variable(& builtin_110_deprecated_uniforms[i],
+			   instructions, state->symbols);
+   }
+
+   add_builtin_constant(instructions, state, "gl_MaxLights",
+			state->Const.MaxLights);
+   add_builtin_constant(instructions, state, "gl_MaxClipPlanes",
+			state->Const.MaxClipPlanes);
+   add_builtin_constant(instructions, state, "gl_MaxTextureUnits",
+			state->Const.MaxTextureUnits);
+   add_builtin_constant(instructions, state, "gl_MaxTextureCoords",
+			state->Const.MaxTextureCoords);
+   add_builtin_constant(instructions, state, "gl_MaxVertexAttribs",
+			state->Const.MaxVertexAttribs);
+   add_builtin_constant(instructions, state, "gl_MaxVertexUniformComponents",
+			state->Const.MaxVertexUniformComponents);
+   add_builtin_constant(instructions, state, "gl_MaxVaryingFloats",
+			state->Const.MaxVaryingFloats);
+   add_builtin_constant(instructions, state, "gl_MaxVertexTextureImageUnits",
+			state->Const.MaxVertexTextureImageUnits);
+   add_builtin_constant(instructions, state, "gl_MaxCombinedTextureImageUnits",
+			state->Const.MaxCombinedTextureImageUnits);
+   add_builtin_constant(instructions, state, "gl_MaxTextureImageUnits",
+			state->Const.MaxTextureImageUnits);
+   add_builtin_constant(instructions, state, "gl_MaxFragmentUniformComponents",
+			state->Const.MaxFragmentUniformComponents);
+
+   const glsl_type *const mat4_array_type =
+      glsl_type::get_array_instance(glsl_type::mat4_type,
+				    state->Const.MaxTextureCoords);
+
+   add_uniform(instructions, state, "gl_TextureMatrix", mat4_array_type);
+   add_uniform(instructions, state, "gl_TextureMatrixInverse", mat4_array_type);
+   add_uniform(instructions, state, "gl_TextureMatrixTranspose", mat4_array_type);
+   add_uniform(instructions, state, "gl_TextureMatrixInverseTranspose", mat4_array_type);
+
+   add_uniform(instructions, state, "gl_DepthRange",
+		state->symbols->get_type("gl_DepthRangeParameters"));
+
+   add_uniform(instructions, state, "gl_ClipPlane",
+	       glsl_type::get_array_instance(glsl_type::vec4_type,
+					     state->Const.MaxClipPlanes));
+   add_uniform(instructions, state, "gl_Point",
+	       state->symbols->get_type("gl_PointParameters"));
+
+   const glsl_type *const material_parameters_type =
+      state->symbols->get_type("gl_MaterialParameters");
+   add_uniform(instructions, state, "gl_FrontMaterial", material_parameters_type);
+   add_uniform(instructions, state, "gl_BackMaterial", material_parameters_type);
+
+   const glsl_type *const light_source_array_type =
+      glsl_type::get_array_instance(state->symbols->get_type("gl_LightSourceParameters"), state->Const.MaxLights);
+
+   add_uniform(instructions, state, "gl_LightSource", light_source_array_type);
+
+   const glsl_type *const light_model_products_type =
+      state->symbols->get_type("gl_LightModelProducts");
+   add_uniform(instructions, state, "gl_FrontLightModelProduct",
+	       light_model_products_type);
+   add_uniform(instructions, state, "gl_BackLightModelProduct",
+	       light_model_products_type);
+
+   const glsl_type *const light_products_type =
+      glsl_type::get_array_instance(state->symbols->get_type("gl_LightProducts"),
+				    state->Const.MaxLights);
+   add_uniform(instructions, state, "gl_FrontLightProduct", light_products_type);
+   add_uniform(instructions, state, "gl_BackLightProduct", light_products_type);
+
+   add_uniform(instructions, state, "gl_TextureEnvColor",
+	       glsl_type::get_array_instance(glsl_type::vec4_type,
+					     state->Const.MaxTextureUnits));
+
+   const glsl_type *const texcoords_vec4 =
+      glsl_type::get_array_instance(glsl_type::vec4_type,
+				    state->Const.MaxTextureCoords);
+   add_uniform(instructions, state, "gl_EyePlaneS", texcoords_vec4);
+   add_uniform(instructions, state, "gl_EyePlaneT", texcoords_vec4);
+   add_uniform(instructions, state, "gl_EyePlaneR", texcoords_vec4);
+   add_uniform(instructions, state, "gl_EyePlaneQ", texcoords_vec4);
+   add_uniform(instructions, state, "gl_ObjectPlaneS", texcoords_vec4);
+   add_uniform(instructions, state, "gl_ObjectPlaneT", texcoords_vec4);
+   add_uniform(instructions, state, "gl_ObjectPlaneR", texcoords_vec4);
+   add_uniform(instructions, state, "gl_ObjectPlaneQ", texcoords_vec4);
+
+   add_uniform(instructions, state, "gl_Fog",
+	       state->symbols->get_type("gl_FogParameters"));
+}
+
+/* This function should only be called for ES, not desktop GL. */
+static void
+generate_100ES_vs_variables(exec_list *instructions,
+			  struct _mesa_glsl_parse_state *state)
+{
+   for (unsigned i = 0; i < Elements(builtin_core_vs_variables); i++) {
+      add_builtin_variable(& builtin_core_vs_variables[i],
+			   instructions, state->symbols);
+   }
+
+   generate_100ES_uniforms(instructions, state);
+
+   generate_ARB_draw_buffers_variables(instructions, state, false,
+				       vertex_shader);
+}
+
+
+static void
+generate_110_vs_variables(exec_list *instructions,
+			  struct _mesa_glsl_parse_state *state)
+{
+   for (unsigned i = 0; i < Elements(builtin_core_vs_variables); i++) {
+      add_builtin_variable(& builtin_core_vs_variables[i],
+			   instructions, state->symbols);
+   }
+
+   for (unsigned i = 0
+	   ; i < Elements(builtin_110_deprecated_vs_variables)
+	   ; i++) {
+      add_builtin_variable(& builtin_110_deprecated_vs_variables[i],
+			   instructions, state->symbols);
+   }
+   generate_110_uniforms(instructions, state);
+
+   /* From page 54 (page 60 of the PDF) of the GLSL 1.20 spec:
+    *
+    *     "As with all arrays, indices used to subscript gl_TexCoord must
+    *     either be an integral constant expressions, or this array must be
+    *     re-declared by the shader with a size. The size can be at most
+    *     gl_MaxTextureCoords. Using indexes close to 0 may aid the
+    *     implementation in preserving varying resources."
+    */
+   const glsl_type *const vec4_array_type =
+      glsl_type::get_array_instance(glsl_type::vec4_type, 0);
+
+   add_variable("gl_TexCoord", ir_var_out, VERT_RESULT_TEX0, vec4_array_type,
+		instructions, state->symbols);
+
+   generate_ARB_draw_buffers_variables(instructions, state, false,
+				       vertex_shader);
+}
+
+
+static void
+generate_120_vs_variables(exec_list *instructions,
+			  struct _mesa_glsl_parse_state *state)
+{
+   /* GLSL version 1.20 did not add any built-in variables in the vertex
+    * shader.
+    */
+   generate_110_vs_variables(instructions, state);
+}
+
+
+static void
+generate_130_vs_variables(exec_list *instructions,
+			  struct _mesa_glsl_parse_state *state)
+{
+   generate_120_vs_variables(instructions, state);
+
+   for (unsigned i = 0; i < Elements(builtin_130_vs_variables); i++) {
+      add_builtin_variable(& builtin_130_vs_variables[i],
+			   instructions, state->symbols);
+   }
+
+   const glsl_type *const clip_distance_array_type =
+      glsl_type::get_array_instance(glsl_type::float_type,
+				    state->Const.MaxClipPlanes);
+
+   /* FINISHME: gl_ClipDistance needs a real location assigned. */
+   add_variable("gl_ClipDistance", ir_var_out, -1, clip_distance_array_type,
+		instructions, state->symbols);
+
+}
+
+
+static void
+initialize_vs_variables(exec_list *instructions,
+			struct _mesa_glsl_parse_state *state)
+{
+
+   switch (state->language_version) {
+   case 100:
+      generate_100ES_vs_variables(instructions, state);
+      break;
+   case 110:
+      generate_110_vs_variables(instructions, state);
+      break;
+   case 120:
+      generate_120_vs_variables(instructions, state);
+      break;
+   case 130:
+      generate_130_vs_variables(instructions, state);
+      break;
+   }
+}
+
+/* This function should only be called for ES, not desktop GL. */
+static void
+generate_100ES_fs_variables(exec_list *instructions,
+			  struct _mesa_glsl_parse_state *state)
+{
+   for (unsigned i = 0; i < Elements(builtin_core_fs_variables); i++) {
+      add_builtin_variable(& builtin_core_fs_variables[i],
+			   instructions, state->symbols);
+   }
+
+   for (unsigned i = 0; i < Elements(builtin_100ES_fs_variables); i++) {
+      add_builtin_variable(& builtin_100ES_fs_variables[i],
+			   instructions, state->symbols);
+   }
+
+   generate_100ES_uniforms(instructions, state);
+
+   generate_ARB_draw_buffers_variables(instructions, state, false,
+				       fragment_shader);
+}
+
+static void
+generate_110_fs_variables(exec_list *instructions,
+			  struct _mesa_glsl_parse_state *state)
+{
+   for (unsigned i = 0; i < Elements(builtin_core_fs_variables); i++) {
+      add_builtin_variable(& builtin_core_fs_variables[i],
+			   instructions, state->symbols);
+   }
+
+   for (unsigned i = 0; i < Elements(builtin_110_fs_variables); i++) {
+      add_builtin_variable(& builtin_110_fs_variables[i],
+			   instructions, state->symbols);
+   }
+
+   for (unsigned i = 0
+	   ; i < Elements(builtin_110_deprecated_fs_variables)
+	   ; i++) {
+      add_builtin_variable(& builtin_110_deprecated_fs_variables[i],
+			   instructions, state->symbols);
+   }
+   generate_110_uniforms(instructions, state);
+
+   /* From page 54 (page 60 of the PDF) of the GLSL 1.20 spec:
+    *
+    *     "As with all arrays, indices used to subscript gl_TexCoord must
+    *     either be an integral constant expressions, or this array must be
+    *     re-declared by the shader with a size. The size can be at most
+    *     gl_MaxTextureCoords. Using indexes close to 0 may aid the
+    *     implementation in preserving varying resources."
+    */
+   const glsl_type *const vec4_array_type =
+      glsl_type::get_array_instance(glsl_type::vec4_type, 0);
+
+   add_variable("gl_TexCoord", ir_var_in, FRAG_ATTRIB_TEX0, vec4_array_type,
+		instructions, state->symbols);
+
+   generate_ARB_draw_buffers_variables(instructions, state, false,
+				       fragment_shader);
+}
+
+
+static void
+generate_ARB_draw_buffers_variables(exec_list *instructions,
+				    struct _mesa_glsl_parse_state *state,
+				    bool warn, _mesa_glsl_parser_targets target)
+{
+   /* gl_MaxDrawBuffers is available in all shader stages.
+    */
+   ir_variable *const mdb =
+      add_variable("gl_MaxDrawBuffers", ir_var_auto, -1,
+		   glsl_type::int_type, instructions, state->symbols);
+
+   if (warn)
+      mdb->warn_extension = "GL_ARB_draw_buffers";
+
+   mdb->constant_value = new(mdb)
+      ir_constant(int(state->Const.MaxDrawBuffers));
+
+
+   /* gl_FragData is only available in the fragment shader.
+    */
+   if (target == fragment_shader) {
+      const glsl_type *const vec4_array_type =
+	 glsl_type::get_array_instance(glsl_type::vec4_type,
+				       state->Const.MaxDrawBuffers);
+
+      ir_variable *const fd =
+	 add_variable("gl_FragData", ir_var_out, FRAG_RESULT_DATA0,
+		      vec4_array_type, instructions, state->symbols);
+
+      if (warn)
+	 fd->warn_extension = "GL_ARB_draw_buffers";
+   }
+}
+
+
+static void
+generate_120_fs_variables(exec_list *instructions,
+			  struct _mesa_glsl_parse_state *state)
+{
+   generate_110_fs_variables(instructions, state);
+
+   for (unsigned i = 0
+	   ; i < Elements(builtin_120_fs_variables)
+	   ; i++) {
+      add_builtin_variable(& builtin_120_fs_variables[i],
+			   instructions, state->symbols);
+   }
+}
+
+static void
+generate_130_fs_variables(exec_list *instructions,
+			  struct _mesa_glsl_parse_state *state)
+{
+   generate_120_fs_variables(instructions, state);
+
+   const glsl_type *const clip_distance_array_type =
+      glsl_type::get_array_instance(glsl_type::float_type,
+				    state->Const.MaxClipPlanes);
+
+   /* FINISHME: gl_ClipDistance needs a real location assigned. */
+   add_variable("gl_ClipDistance", ir_var_in, -1, clip_distance_array_type,
+		instructions, state->symbols);
+}
+
+static void
+initialize_fs_variables(exec_list *instructions,
+			struct _mesa_glsl_parse_state *state)
+{
+
+   switch (state->language_version) {
+   case 100:
+      generate_100ES_fs_variables(instructions, state);
+      break;
+   case 110:
+      generate_110_fs_variables(instructions, state);
+      break;
+   case 120:
+      generate_120_fs_variables(instructions, state);
+      break;
+   case 130:
+      generate_130_fs_variables(instructions, state);
+      break;
+   }
+}
+
+void
+_mesa_glsl_initialize_variables(exec_list *instructions,
+				struct _mesa_glsl_parse_state *state)
+{
+   switch (state->target) {
+   case vertex_shader:
+      initialize_vs_variables(instructions, state);
+      break;
+   case geometry_shader:
+      break;
+   case fragment_shader:
+      initialize_fs_variables(instructions, state);
+      break;
+   case ir_shader:
+      fprintf(stderr, "ir reader has no builtin variables");
+      exit(1);
+      break;
+   }
+}