-{
- struct st_framebuffer *stfb = (struct st_framebuffer *) fb;
- struct pipe_surface *surf_front, *surf_back;
-
- (void) st_get_framebuffer_surface(stfb, frontIndex, &surf_front);
- (void) st_get_framebuffer_surface(stfb, backIndex, &surf_back);
-
- if (surf_front && surf_back) {
- if (st->pipe->surface_copy) {
- st->pipe->surface_copy(st->pipe,
- surf_front, 0, 0, /* dest */
- surf_back, 0, 0, /* src */
- fb->Width, fb->Height);
- } else {
- util_surface_copy(st->pipe, FALSE,
- surf_front, 0, 0,
- surf_back, 0, 0,
- fb->Width, fb->Height);
- }
- }
-}
-
-
-/**
- * Check if we're drawing into, or read from, a front color buffer. If the
- * front buffer is missing, create it now.
- *
- * The back color buffer must exist since we'll use its format/samples info
- * for creating the front buffer.
- *
- * \param frontIndex either BUFFER_FRONT_LEFT or BUFFER_FRONT_RIGHT
- * \param backIndex either BUFFER_BACK_LEFT or BUFFER_BACK_RIGHT
- */
-static void
-check_create_front_buffer(GLcontext *ctx, struct gl_framebuffer *fb,
- gl_buffer_index frontIndex,
- gl_buffer_index backIndex)
-{
- if (fb->Attachment[frontIndex].Renderbuffer == NULL) {
- GLboolean create = GL_FALSE;
-
- /* check if drawing to or reading from front buffer */
- if (fb->_ColorReadBufferIndex == frontIndex) {
- create = GL_TRUE;
- }
- else {
- GLuint b;
- for (b = 0; b < fb->_NumColorDrawBuffers; b++) {
- if (fb->_ColorDrawBufferIndexes[b] == frontIndex) {
- create = GL_TRUE;
- break;
- }