glsl2: Move the compiler to the subdirectory it will live in in Mesa.

1 files changed, 345 insertions, 0 deletions

diff --git a/src/glsl/ir_variable.cpp b/src/glsl/ir_variable.cpp
new file mode 100644
index 00000000000..15a4a92f628
--- /dev/null
+++ b/src/glsl/ir_variable.cpp
@@ -0,0 +1,345 @@
+/*
+ * 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"
+
+#ifndef Elements
+#define Elements(x) (sizeof(x)/sizeof(*(x)))
+#endif
+
+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);
+
+   var->mode = mode;
+   switch (var->mode) {
+   case ir_var_in:
+      var->shader_in = true;
+      var->read_only = true;
+      break;
+   case ir_var_inout:
+      var->shader_in = true;
+      var->shader_out = true;
+      break;
+   case ir_var_out:
+      var->shader_out = true;
+      break;
+   case ir_var_uniform:
+      var->shader_in = true;
+      var->read_only = true;
+      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 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
+generate_110_uniforms(exec_list *instructions,
+		      glsl_symbol_table *symtab)
+{
+   for (unsigned i = 0
+	   ; i < Elements(builtin_110_deprecated_uniforms)
+	   ; i++) {
+      add_builtin_variable(& builtin_110_deprecated_uniforms[i],
+			   instructions, symtab);
+   }
+
+   /* FINISHME: The size of this array is implementation dependent based on the
+    * FINISHME: value of GL_MAX_TEXTURE_COORDS.  Every platform that supports
+    * FINISHME: GLSL sets GL_MAX_TEXTURE_COORDS to at least 4, so hard-code 4
+    * FINISHME: for now.
+    */
+   const glsl_type *const mat4_array_type =
+      glsl_type::get_array_instance(symtab, glsl_type::mat4_type, 4);
+
+   add_variable("gl_TextureMatrix", ir_var_uniform, -1, mat4_array_type,
+		instructions, symtab);
+
+   /* FINISHME: Add support for gl_DepthRangeParameters */
+   /* FINISHME: Add support for gl_ClipPlane[] */
+   /* FINISHME: Add support for gl_PointParameters */
+
+   /* FINISHME: Add support for gl_MaterialParameters
+    * FINISHME: (glFrontMaterial, glBackMaterial)
+    */
+
+   /* FINISHME: The size of this array is implementation dependent based on the
+    * FINISHME: value of GL_MAX_TEXTURE_LIGHTS.  GL_MAX_TEXTURE_LIGHTS must be
+    * FINISHME: at least 8, so hard-code 8 for now.
+    */
+   const glsl_type *const light_source_array_type =
+      glsl_type::get_array_instance(symtab,
+				    symtab->get_type("gl_LightSourceParameters"), 8);
+
+   add_variable("gl_LightSource", ir_var_uniform, -1, light_source_array_type,
+		instructions, symtab);
+
+   /* FINISHME: Add support for gl_LightModel */
+   /* FINISHME: Add support for gl_FrontLightProduct[], gl_BackLightProduct[] */
+   /* FINISHME: Add support for gl_TextureEnvColor[] */
+   /* FINISHME: Add support for gl_ObjectPlane*[], gl_EyePlane*[] */
+   /* FINISHME: Add support for gl_Fog */
+}
+
+static void
+generate_110_vs_variables(exec_list *instructions,
+			  glsl_symbol_table *symtab)
+{
+   for (unsigned i = 0; i < Elements(builtin_core_vs_variables); i++) {
+      add_builtin_variable(& builtin_core_vs_variables[i],
+			   instructions, symtab);
+   }
+
+   for (unsigned i = 0
+	   ; i < Elements(builtin_110_deprecated_vs_variables)
+	   ; i++) {
+      add_builtin_variable(& builtin_110_deprecated_vs_variables[i],
+			   instructions, symtab);
+   }
+   generate_110_uniforms(instructions, symtab);
+
+   /* FINISHME: The size of this array is implementation dependent based on the
+    * FINISHME: value of GL_MAX_TEXTURE_COORDS.  Every platform that supports
+    * FINISHME: GLSL sets GL_MAX_TEXTURE_COORDS to at least 4, so hard-code 4
+    * FINISHME: for now.
+    */
+   const glsl_type *const vec4_array_type =
+      glsl_type::get_array_instance(symtab, glsl_type::vec4_type, 4);
+
+   add_variable("gl_TexCoord", ir_var_out, VERT_RESULT_TEX0, vec4_array_type,
+		instructions, symtab);
+}
+
+
+static void
+generate_120_vs_variables(exec_list *instructions,
+			  glsl_symbol_table *symtab)
+{
+   /* GLSL version 1.20 did not add any built-in variables in the vertex
+    * shader.
+    */
+   generate_110_vs_variables(instructions, symtab);
+}
+
+
+static void
+generate_130_vs_variables(exec_list *instructions,
+			  glsl_symbol_table *symtab)
+{
+   void *ctx = symtab;
+   generate_120_vs_variables(instructions, symtab);
+
+   for (unsigned i = 0; i < Elements(builtin_130_vs_variables); i++) {
+      add_builtin_variable(& builtin_130_vs_variables[i],
+			   instructions, symtab);
+   }
+
+   /* FINISHME: The size of this array is implementation dependent based on
+    * FINISHME: the value of GL_MAX_CLIP_DISTANCES.
+    */
+   const glsl_type *const clip_distance_array_type =
+      glsl_type::get_array_instance(ctx, glsl_type::float_type, 8);
+
+   /* FINISHME: gl_ClipDistance needs a real location assigned. */
+   add_variable("gl_ClipDistance", ir_var_out, -1, clip_distance_array_type,
+		instructions, symtab);
+
+}
+
+
+static void
+initialize_vs_variables(exec_list *instructions,
+			struct _mesa_glsl_parse_state *state)
+{
+
+   switch (state->language_version) {
+   case 110:
+      generate_110_vs_variables(instructions, state->symbols);
+      break;
+   case 120:
+      generate_120_vs_variables(instructions, state->symbols);
+      break;
+   case 130:
+      generate_130_vs_variables(instructions, state->symbols);
+      break;
+   }
+}
+
+static void
+generate_110_fs_variables(exec_list *instructions,
+			  glsl_symbol_table *symtab)
+{
+   for (unsigned i = 0; i < Elements(builtin_core_fs_variables); i++) {
+      add_builtin_variable(& builtin_core_fs_variables[i],
+			   instructions, symtab);
+   }
+
+   for (unsigned i = 0
+	   ; i < Elements(builtin_110_deprecated_fs_variables)
+	   ; i++) {
+      add_builtin_variable(& builtin_110_deprecated_fs_variables[i],
+			   instructions, symtab);
+   }
+   generate_110_uniforms(instructions, symtab);
+
+   /* FINISHME: The size of this array is implementation dependent based on the
+    * FINISHME: value of GL_MAX_TEXTURE_COORDS.  Every platform that supports
+    * FINISHME: GLSL sets GL_MAX_TEXTURE_COORDS to at least 4, so hard-code 4
+    * FINISHME: for now.
+    */
+   const glsl_type *const vec4_array_type =
+      glsl_type::get_array_instance(symtab, glsl_type::vec4_type, 4);
+
+   add_variable("gl_TexCoord", ir_var_in, FRAG_ATTRIB_TEX0, vec4_array_type,
+		instructions, symtab);
+}
+
+
+static void
+generate_ARB_draw_buffers_fs_variables(exec_list *instructions,
+				       glsl_symbol_table *symtab, bool warn)
+{
+   /* FINISHME: The size of this array is implementation dependent based on the
+    * FINISHME: value of GL_MAX_DRAW_BUFFERS.  GL_MAX_DRAW_BUFFERS must be
+    * FINISHME: at least 1, so hard-code 1 for now.
+    */
+   const glsl_type *const vec4_array_type =
+      glsl_type::get_array_instance(symtab, glsl_type::vec4_type, 1);
+
+   ir_variable *const fd =
+      add_variable("gl_FragData", ir_var_out, FRAG_RESULT_DATA0,
+		   vec4_array_type, instructions, symtab);
+
+   if (warn)
+      fd->warn_extension = "GL_ARB_draw_buffers";
+}
+
+
+static void
+generate_120_fs_variables(exec_list *instructions,
+			  glsl_symbol_table *symtab)
+{
+   generate_110_fs_variables(instructions, symtab);
+   generate_ARB_draw_buffers_fs_variables(instructions, symtab, false);
+}
+
+static void
+generate_130_fs_variables(exec_list *instructions,
+			  glsl_symbol_table *symtab)
+{
+   void *ctx = symtab;
+   generate_120_fs_variables(instructions, symtab);
+
+   /* FINISHME: The size of this array is implementation dependent based on
+    * FINISHME: the value of GL_MAX_CLIP_DISTANCES.
+    */
+   const glsl_type *const clip_distance_array_type =
+      glsl_type::get_array_instance(ctx, glsl_type::float_type, 8);
+
+   /* FINISHME: gl_ClipDistance needs a real location assigned. */
+   add_variable("gl_ClipDistance", ir_var_in, -1, clip_distance_array_type,
+		instructions, symtab);
+}
+
+static void
+initialize_fs_variables(exec_list *instructions,
+			struct _mesa_glsl_parse_state *state)
+{
+
+   switch (state->language_version) {
+   case 110:
+      generate_110_fs_variables(instructions, state->symbols);
+      break;
+   case 120:
+      generate_120_fs_variables(instructions, state->symbols);
+      break;
+   case 130:
+      generate_130_fs_variables(instructions, state->symbols);
+      break;
+   }
+
+
+   /* Since GL_ARB_draw_buffers is included in GLSL 1.20 and later, we
+    * can basically ignore any extension settings for it.
+    */
+   if (state->language_version < 120) {
+      if (state->ARB_draw_buffers_enable) {
+	 generate_ARB_draw_buffers_fs_variables(instructions, state->symbols,
+						state->ARB_draw_buffers_warn);
+      }
+   }
+}
+
+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;
+   }
+}