[Mesa-dev] [PATCH 2/4] glsl: Move initialize_context() to glsl_parser_extras.cpp so it can be re-used.

[Paul Berry]

This function is used by main.cpp to initialize a context to a default
configuration for use in compiling builtins.  Moved the bulk of it to
glsl_parser_extras.cpp so that it can be re-used in testing.
---
 src/glsl/glsl_parser_extras.cpp |   33 +++++++++++++++++++++++++++++++++
 src/glsl/glsl_parser_extras.h   |   11 +++++++++++
 src/glsl/main.cpp               |   25 +------------------------
 3 files changed, 45 insertions(+), 24 deletions(-)

diff --git a/src/glsl/glsl_parser_extras.cpp b/src/glsl/glsl_parser_extras.cpp
index cc78137..936dbcc 100644
--- a/src/glsl/glsl_parser_extras.cpp
+++ b/src/glsl/glsl_parser_extras.cpp
@@ -926,6 +926,39 @@ do_common_optimization(exec_list *ir, bool linked, unsigned max_unroll_iteration
    return progress;
 }
 
+void initialize_context_to_defaults(struct gl_context *ctx, gl_api api)
+{
+   memset(ctx, 0, sizeof(*ctx));
+
+   ctx->API = api;
+
+   ctx->Extensions.ARB_ES2_compatibility = GL_TRUE;
+   ctx->Extensions.ARB_draw_buffers = GL_TRUE;
+   ctx->Extensions.ARB_draw_instanced = GL_TRUE;
+   ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
+   ctx->Extensions.EXT_texture_array = GL_TRUE;
+   ctx->Extensions.NV_texture_rectangle = GL_TRUE;
+   ctx->Extensions.EXT_texture3D = GL_TRUE;
+
+   ctx->Const.GLSLVersion = 120;
+
+   /* 1.10 minimums. */
+   ctx->Const.MaxLights = 8;
+   ctx->Const.MaxClipPlanes = 6;
+   ctx->Const.MaxTextureUnits = 2;
+   ctx->Const.MaxTextureCoordUnits = 2;
+   ctx->Const.VertexProgram.MaxAttribs = 16;
+
+   ctx->Const.VertexProgram.MaxUniformComponents = 512;
+   ctx->Const.MaxVarying = 8;
+   ctx->Const.MaxVertexTextureImageUnits = 0;
+   ctx->Const.MaxCombinedTextureImageUnits = 2;
+   ctx->Const.MaxTextureImageUnits = 2;
+   ctx->Const.FragmentProgram.MaxUniformComponents = 64;
+
+   ctx->Const.MaxDrawBuffers = 2;
+}
+
 extern "C" {
 
 /**
diff --git a/src/glsl/glsl_parser_extras.h b/src/glsl/glsl_parser_extras.h
index 2f4d3cb..3f88abd 100644
--- a/src/glsl/glsl_parser_extras.h
+++ b/src/glsl/glsl_parser_extras.h
@@ -33,6 +33,7 @@
 
 #include <stdlib.h>
 #include "glsl_symbol_table.h"
+#include "main/mtypes.h"
 
 enum _mesa_glsl_parser_targets {
    vertex_shader,
@@ -258,6 +259,16 @@ extern bool _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 extern const char *
 _mesa_glsl_shader_target_name(enum _mesa_glsl_parser_targets target);
 
+/**
+ * Initialize the given gl_context structure to a reasonable set of
+ * defaults representing the minimum capabilities required by the
+ * OpenGL spec.
+ *
+ * This is used when compiling builtin functions and in testing, when
+ * we don't have a connection to an actual driver.
+ */
+void initialize_context_to_defaults(struct gl_context *ctx, gl_api api);
+
 
 #endif /* __cplusplus */
 
diff --git a/src/glsl/main.cpp b/src/glsl/main.cpp
index 7952bb1..4cfcf0c 100644
--- a/src/glsl/main.cpp
+++ b/src/glsl/main.cpp
@@ -66,43 +66,20 @@ _mesa_new_shader(struct gl_context *ctx, GLuint name, GLenum type)
 static void
 initialize_context(struct gl_context *ctx, gl_api api)
 {
-   memset(ctx, 0, sizeof(*ctx));
-
-   ctx->API = api;
-
-   ctx->Extensions.ARB_ES2_compatibility = GL_TRUE;
-   ctx->Extensions.ARB_draw_buffers = GL_TRUE;
-   ctx->Extensions.ARB_draw_instanced = GL_TRUE;
-   ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
-   ctx->Extensions.EXT_texture_array = GL_TRUE;
-   ctx->Extensions.NV_texture_rectangle = GL_TRUE;
-   ctx->Extensions.EXT_texture3D = GL_TRUE;
+   initialize_context_to_defaults(ctx, api);
 
    /* GLSL 1.30 isn't fully supported, but we need to advertise 1.30 so that
     * the built-in functions for 1.30 can be built.
     */
    ctx->Const.GLSLVersion = 130;
 
-   /* 1.10 minimums. */
-   ctx->Const.MaxLights = 8;
    ctx->Const.MaxClipPlanes = 8;
-   ctx->Const.MaxTextureUnits = 2;
 
    /* More than the 1.10 minimum to appease parser tests taken from
     * apps that (hopefully) already checked the number of coords.
     */
    ctx->Const.MaxTextureCoordUnits = 4;
 
-   ctx->Const.VertexProgram.MaxAttribs = 16;
-   ctx->Const.VertexProgram.MaxUniformComponents = 512;
-   ctx->Const.MaxVarying = 8;
-   ctx->Const.MaxVertexTextureImageUnits = 0;
-   ctx->Const.MaxCombinedTextureImageUnits = 2;
-   ctx->Const.MaxTextureImageUnits = 2;
-   ctx->Const.FragmentProgram.MaxUniformComponents = 64;
-
-   ctx->Const.MaxDrawBuffers = 2;
-
    ctx->Driver.NewShader = _mesa_new_shader;
 }
 
-- 
1.7.6