swrast: add an interface createNewContextForAPI

This new interface could set up context for OpenGL,
OpenGL ES1 and OpenGL ES2. It will be used by egl_dri2
driver.

Signed-off-by: Haitao Feng <haitao.feng@intel.com>

include/GL/internal/dri_interface.h

@@ -657,7 +657,7 @@ struct __DRIlegacyExtensionRec {
  * conjunction with the core extension.
  */
 #define __DRI_SWRAST "DRI_SWRast"
-#define __DRI_SWRAST_VERSION 1
+#define __DRI_SWRAST_VERSION 2
 
 struct __DRIswrastExtensionRec {
     __DRIextension base;
@@ -670,6 +670,13 @@ struct __DRIswrastExtensionRec {
     __DRIdrawable *(*createNewDrawable)(__DRIscreen *screen,
 					const __DRIconfig *config,
 					void *loaderPrivate);
+
+   /* Since version 2 */
+   __DRIcontext *(*createNewContextForAPI)(__DRIscreen *screen,
+                                           int api,
+                                           const __DRIconfig *config,
+                                           __DRIcontext *shared,
+                                           void *data);
 };
 
 /**

src/mesa/drivers/dri/common/drisw_util.c

@@ -121,6 +121,48 @@ driCreateNewContext(__DRIscreen *psp, const __DRIconfig *config,
     return pcp;
 }
 
+static __DRIcontext *
+driCreateNewContextForAPI(__DRIscreen *psp, int api,
+                          const __DRIconfig *config,
+                          __DRIcontext *shared, void *data)
+{
+    __DRIcontext *pcp;
+    void * const shareCtx = (shared != NULL) ? shared->driverPrivate : NULL;
+    gl_api mesa_api;
+
+    switch (api) {
+    case __DRI_API_OPENGL:
+            mesa_api = API_OPENGL;
+            break;
+    case __DRI_API_GLES:
+            mesa_api = API_OPENGLES;
+            break;
+    case __DRI_API_GLES2:
+            mesa_api = API_OPENGLES2;
+            break;
+    default:
+            return NULL;
+    }
+
+    pcp = CALLOC_STRUCT(__DRIcontextRec);
+    if (!pcp)
+        return NULL;
+
+    pcp->loaderPrivate = data;
+
+    pcp->driScreenPriv = psp;
+    pcp->driDrawablePriv = NULL;
+    pcp->driReadablePriv = NULL;
+
+    if (!driDriverAPI.CreateContext(mesa_api,
+                            &config->modes, pcp, shareCtx)) {
+        FREE(pcp);
+        return NULL;
+    }
+
+    return pcp;
+}
+
 static void
 driDestroyContext(__DRIcontext *pcp)
 {
@@ -269,5 +311,6 @@ const __DRIcoreExtension driCoreExtension = {
 const __DRIswrastExtension driSWRastExtension = {
     { __DRI_SWRAST, __DRI_SWRAST_VERSION },
     driCreateNewScreen,
-    driCreateNewDrawable
+    driCreateNewDrawable,
+    driCreateNewContextForAPI
 };

src/mesa/drivers/dri/swrast/swrast.c

@@ -561,6 +561,60 @@ swrast_init_driver_functions(struct dd_function_table *driver)
     driver->ChooseTextureFormat = swrastChooseTextureFormat;
 }
 
+static const char *es2_extensions[] = {
+   /* Used by mesa internally (cf all_mesa_extensions in ../common/utils.c) */
+   "GL_ARB_draw_buffers",
+   "GL_ARB_multisample",
+   "GL_ARB_texture_compression",
+   "GL_ARB_transpose_matrix",
+   "GL_ARB_vertex_buffer_object",
+   "GL_ARB_window_pos",
+   "GL_EXT_blend_func_separate",
+   "GL_EXT_compiled_vertex_array",
+   "GL_EXT_framebuffer_blit",
+   "GL_EXT_multi_draw_arrays",
+   "GL_EXT_polygon_offset",
+   "GL_EXT_texture_object",
+   "GL_EXT_vertex_array",
+   "GL_IBM_multimode_draw_arrays",
+   "GL_MESA_window_pos",
+   "GL_NV_vertex_program",
+
+   /* Required by GLES2 */
+   "GL_ARB_fragment_program",
+   "GL_ARB_fragment_shader",
+   "GL_ARB_multitexture",
+   "GL_ARB_shader_objects",
+   "GL_ARB_texture_cube_map",
+   "GL_ARB_texture_mirrored_repeat",
+   "GL_ARB_texture_non_power_of_two",
+   "GL_ARB_vertex_shader",
+   "GL_EXT_blend_color",
+   "GL_EXT_blend_equation_separate",
+   "GL_EXT_blend_minmax",
+   "GL_EXT_blend_subtract",
+   "GL_EXT_stencil_wrap",
+
+   /* Optional GLES2 */
+   "GL_ARB_framebuffer_object",
+   "GL_EXT_texture_filter_anisotropic",
+   "GL_ARB_depth_texture",
+   "GL_EXT_packed_depth_stencil",
+   "GL_EXT_framebuffer_object",
+   NULL,
+};
+
+static void
+InitExtensionsES2(struct gl_context *ctx)
+{
+   int i;
+
+   /* Can't use driInitExtensions() since it uses extensions from
+    * main/remap_helper.h when called the first time. */
+
+   for (i = 0; es2_extensions[i]; i++)
+      _mesa_enable_extension(ctx, es2_extensions[i]);
+}
 
 /**
  * Context-related functions.
@@ -597,7 +651,7 @@ dri_create_context(gl_api api,
     mesaCtx = &ctx->Base;
 
     /* basic context setup */
-    if (!_mesa_initialize_context(mesaCtx, visual, sharedCtx, &functions, (void *) cPriv)) {
+    if (!_mesa_initialize_context_for_api(mesaCtx, api, visual, sharedCtx, &functions, (void *) cPriv)) {
 	goto context_fail;
     }
 
@@ -617,16 +671,29 @@ dri_create_context(gl_api api,
        tnl->Driver.RunPipeline = _tnl_run_pipeline;
     }
 
-    _mesa_enable_sw_extensions(mesaCtx);
-    _mesa_enable_1_3_extensions(mesaCtx);
-    _mesa_enable_1_4_extensions(mesaCtx);
-    _mesa_enable_1_5_extensions(mesaCtx);
-    _mesa_enable_2_0_extensions(mesaCtx);
-    _mesa_enable_2_1_extensions(mesaCtx);
-
     _mesa_meta_init(mesaCtx);
+    _mesa_enable_sw_extensions(mesaCtx);
 
-    driInitExtensions( mesaCtx, NULL, GL_FALSE );
+    switch (api) {
+    case API_OPENGL:
+        _mesa_enable_1_3_extensions(mesaCtx);
+        _mesa_enable_1_4_extensions(mesaCtx);
+        _mesa_enable_1_5_extensions(mesaCtx);
+        _mesa_enable_2_0_extensions(mesaCtx);
+        _mesa_enable_2_1_extensions(mesaCtx);
+
+        driInitExtensions( mesaCtx, NULL, GL_FALSE );
+        break;
+    case API_OPENGLES:
+        _mesa_enable_1_3_extensions(mesaCtx);
+        _mesa_enable_1_4_extensions(mesaCtx);
+        _mesa_enable_1_5_extensions(mesaCtx);
+
+        break;
+    case API_OPENGLES2:
+        InitExtensionsES2( mesaCtx);
+        break;
+    }
 
     return GL_TRUE;