mesa/glsl: stop using GL shader type internally

Instead use the internal gl_shader_stage enum everywhere. This
makes things more consistent and gets rid of unnecessary
conversions.

Ideally it would be nice to remove the Type field from gl_shader
altogether but currently it is used to differentiate between
gl_shader and gl_shader_program in the ShaderObjects hash table.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

src/compiler/glsl/builtin_functions.cpp

@@ -956,7 +956,7 @@ builtin_builder::create_shader()
     * GLSL utility code that could be linked against any stage, so just
     * arbitrarily pick GL_VERTEX_SHADER.
     */
-   shader = _mesa_new_shader(NULL, 0, GL_VERTEX_SHADER);
+   shader = _mesa_new_shader(NULL, 0, MESA_SHADER_VERTEX);
    shader->symbols = new(mem_ctx) glsl_symbol_table;
 
    gl_ModelViewProjectionMatrix =

src/compiler/glsl/link_varyings.cpp

@@ -2129,7 +2129,7 @@ assign_varying_locations(struct gl_context *ctx,
           * within a patch and can be used as shared memory.
           */
          if (input_var || (prog->SeparateShader && consumer == NULL) ||
-             producer->Type == GL_TESS_CONTROL_SHADER) {
+             producer->Stage == MESA_SHADER_TESS_CTRL) {
             matches.record(output_var, input_var);
          }
 

src/compiler/glsl/linker.cpp

@@ -2235,7 +2235,7 @@ link_intrastage_shaders(void *mem_ctx,
       return NULL;
    }
 
-   gl_shader *linked = ctx->Driver.NewShader(NULL, 0, main->Type);
+   gl_shader *linked = ctx->Driver.NewShader(NULL, 0, shader_list[0]->Stage);
    linked->ir = new(linked) exec_list;
    clone_ir_list(mem_ctx, linked->ir, main->ir);
 

src/compiler/glsl/standalone.cpp

@@ -418,7 +418,7 @@ standalone_compile_shader(const struct standalone_options *_options,
             continue;
 
          shader->Program = rzalloc(shader, gl_program);
-         init_gl_program(shader->Program, shader->Type);
+         init_gl_program(shader->Program, shader->Stage);
       }
    }
 

src/compiler/glsl/standalone_scaffolding.cpp

@@ -68,17 +68,16 @@ _mesa_shader_debug(struct gl_context *, GLenum, GLuint *,
 }
 
 struct gl_shader *
-_mesa_new_shader(struct gl_context *ctx, GLuint name, GLenum type)
+_mesa_new_shader(struct gl_context *ctx, GLuint name, gl_shader_stage stage)
 {
    struct gl_shader *shader;
 
    (void) ctx;
 
-   assert(type == GL_FRAGMENT_SHADER || type == GL_VERTEX_SHADER);
+   assert(stage == MESA_SHADER_FRAGMENT || stage == MESA_SHADER_VERTEX);
    shader = rzalloc(NULL, struct gl_shader);
    if (shader) {
-      shader->Type = type;
-      shader->Stage = _mesa_shader_enum_to_shader_stage(type);
+      shader->Stage = stage;
       shader->Name = name;
       shader->RefCount = 1;
    }

src/compiler/glsl/standalone_scaffolding.h

@@ -42,7 +42,7 @@ _mesa_reference_shader(struct gl_context *ctx, struct gl_shader **ptr,
                        struct gl_shader *sh);
 
 extern "C" struct gl_shader *
-_mesa_new_shader(struct gl_context *ctx, GLuint name, GLenum type);
+_mesa_new_shader(struct gl_context *ctx, GLuint name, gl_shader_stage stage);
 
 extern "C" void
 _mesa_delete_shader(struct gl_context *ctx, struct gl_shader *sh);