diff options
| -rw-r--r-- | src/mesa/state_tracker/st_framebuffer.c | 79 | ||||
| -rw-r--r-- | src/mesa/state_tracker/st_public.h | 4 |
2 files changed, 83 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_framebuffer.c b/src/mesa/state_tracker/st_framebuffer.c index 6ad64739bd..07ccaa6aab 100644 --- a/src/mesa/state_tracker/st_framebuffer.c +++ b/src/mesa/state_tracker/st_framebuffer.c @@ -293,6 +293,85 @@ st_notify_swapbuffers(struct st_framebuffer *stfb) } +/** + * Swap the front/back color buffers. Exchange the front/back pointers + * and update some derived state. + * No need to call st_notify_swapbuffers() first. + * This is effectively a no-op for single-buffered framebuffers. + * \param front_left returns pointer to front-left renderbuffer after swap + * \param front_right returns pointer to front-right renderbuffer after swap + */ +void +st_swapbuffers(struct st_framebuffer *stfb, + struct pipe_surface **front_left, + struct pipe_surface **front_right) +{ + struct gl_framebuffer *fb = &stfb->Base; + + GET_CURRENT_CONTEXT(ctx); + + if (ctx && ctx->DrawBuffer == &stfb->Base) { + st_flush( ctx->st, + PIPE_FLUSH_RENDER_CACHE | + PIPE_FLUSH_SWAPBUFFERS | + PIPE_FLUSH_FRAME, + NULL ); + } + + /* swap left buffers */ + if (fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer && + fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer) { + struct gl_renderbuffer *rbTemp; + rbTemp = fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer; + fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer = + fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer; + fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer = rbTemp; + if (front_left) { + struct st_renderbuffer *strb = + st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer); + *front_left = strb->surface; + } + } + else { + /* no front buffer, display the back buffer */ + if (front_left) { + struct st_renderbuffer *strb = + st_renderbuffer(fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer); + *front_left = strb->surface; + } + } + + /* swap right buffers (for stereo) */ + if (fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer && + fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer) { + struct gl_renderbuffer *rbTemp; + rbTemp = fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer; + fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer = + fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer; + fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer = rbTemp; + if (front_right) { + struct st_renderbuffer *strb = + st_renderbuffer(fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer); + *front_right = strb->surface; + } + } + else { + /* no front right buffer, display back right buffer (if exists) */ + if (front_right) { + struct st_renderbuffer *strb = + st_renderbuffer(fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer); + *front_right = strb ? strb->surface : NULL; + } + } + + /* Update the _ColorDrawBuffers[] array and _ColorReadBuffer pointer */ + _mesa_update_framebuffer(ctx); + + /* Make sure we draw into the new back surface */ + st_invalidate_state(ctx, _NEW_BUFFERS); +} + + void *st_framebuffer_private( struct st_framebuffer *stfb ) { return stfb->Private; diff --git a/src/mesa/state_tracker/st_public.h b/src/mesa/state_tracker/st_public.h index 290b8a974e..174fbc6394 100644 --- a/src/mesa/state_tracker/st_public.h +++ b/src/mesa/state_tracker/st_public.h @@ -103,6 +103,10 @@ void st_finish( struct st_context *st ); void st_notify_swapbuffers(struct st_framebuffer *stfb); +void st_swapbuffers(struct st_framebuffer *stfb, + struct pipe_surface **front_left, + struct pipe_surface **front_right); + int st_set_teximage(struct pipe_texture *pt, int target); /** Redirect rendering into stfb's surface to a texture image */ |