diff options
Diffstat (limited to 'src/mesa/main/renderbuffer.c')
-rw-r--r-- | src/mesa/main/renderbuffer.c | 88 |
1 files changed, 67 insertions, 21 deletions
diff --git a/src/mesa/main/renderbuffer.c b/src/mesa/main/renderbuffer.c index e387c42c34..49706b5251 100644 --- a/src/mesa/main/renderbuffer.c +++ b/src/mesa/main/renderbuffer.c @@ -1435,6 +1435,17 @@ put_mono_values_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, } +static void +copy_buffer_alpha8(struct gl_renderbuffer* dst, struct gl_renderbuffer* src) +{ + ASSERT(dst->_ActualFormat == GL_ALPHA8); + ASSERT(src->_ActualFormat == GL_ALPHA8); + ASSERT(dst->Width == src->Width); + ASSERT(dst->Height == src->Height); + + _mesa_memcpy(dst->Data, src->Data, dst->Width * dst->Height * sizeof(GLubyte)); +} + /**********************************************************************/ /**********************************************************************/ @@ -1462,7 +1473,7 @@ _mesa_init_renderbuffer(struct gl_renderbuffer *rb, GLuint name) rb->ClassID = 0; rb->Name = name; - rb->RefCount = 1; + rb->RefCount = 0; rb->Delete = _mesa_delete_renderbuffer; /* The rest of these should be set later by the caller of this function or @@ -1766,6 +1777,27 @@ _mesa_add_alpha_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb, /** + * For framebuffers that use a software alpha channel wrapper + * created by _mesa_add_alpha_renderbuffer or _mesa_add_soft_renderbuffers, + * copy the back buffer alpha channel into the front buffer alpha channel. + */ +void +_mesa_copy_soft_alpha_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb) +{ + if (fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer && + fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer) + copy_buffer_alpha8(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer, + fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer); + + + if (fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer && + fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer) + copy_buffer_alpha8(fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer, + fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer); +} + + +/** * Add a software-based depth renderbuffer to the given framebuffer. * This is a helper routine for device drivers when creating a * window system framebuffer (not a user-created render/framebuffer). @@ -2073,9 +2105,7 @@ _mesa_add_renderbuffer(struct gl_framebuffer *fb, fb->Attachment[bufferName].Type = GL_RENDERBUFFER_EXT; fb->Attachment[bufferName].Complete = GL_TRUE; - fb->Attachment[bufferName].Renderbuffer = rb; - - rb->RefCount++; + _mesa_reference_renderbuffer(&fb->Attachment[bufferName].Renderbuffer, rb); } @@ -2093,38 +2123,55 @@ _mesa_remove_renderbuffer(struct gl_framebuffer *fb, GLuint bufferName) if (!rb) return; - _mesa_unreference_renderbuffer(&rb); + _mesa_reference_renderbuffer(&rb, NULL); fb->Attachment[bufferName].Renderbuffer = NULL; } /** - * Decrement a renderbuffer object's reference count and delete it when - * the refcount hits zero. - * Note: we pass the address of a pointer. + * Set *ptr to point to rb. If *ptr points to another renderbuffer, + * dereference that buffer first. The new renderbuffer's refcount will + * be incremented. The old renderbuffer's refcount will be decremented. */ void -_mesa_unreference_renderbuffer(struct gl_renderbuffer **rb) +_mesa_reference_renderbuffer(struct gl_renderbuffer **ptr, + struct gl_renderbuffer *rb) { - assert(rb); - if (*rb) { + assert(ptr); + if (*ptr == rb) { + /* no change */ + return; + } + + if (*ptr) { + /* Unreference the old renderbuffer */ GLboolean deleteFlag = GL_FALSE; + struct gl_renderbuffer *oldRb = *ptr; - _glthread_LOCK_MUTEX((*rb)->Mutex); - ASSERT((*rb)->RefCount > 0); - (*rb)->RefCount--; - deleteFlag = ((*rb)->RefCount == 0); - _glthread_UNLOCK_MUTEX((*rb)->Mutex); + _glthread_LOCK_MUTEX(oldRb->Mutex); + ASSERT(oldRb->RefCount > 0); + oldRb->RefCount--; + /*printf("RB DECR %p to %d\n", (void*) oldRb, oldRb->RefCount);*/ + deleteFlag = (oldRb->RefCount == 0); + _glthread_UNLOCK_MUTEX(oldRb->Mutex); if (deleteFlag) - (*rb)->Delete(*rb); + oldRb->Delete(oldRb); - *rb = NULL; + *ptr = NULL; } -} - + assert(!*ptr); + if (rb) { + /* reference new renderbuffer */ + _glthread_LOCK_MUTEX(rb->Mutex); + rb->RefCount++; + /*printf("RB REF %p to %d\n", (void*)rb, rb->RefCount);*/ + _glthread_UNLOCK_MUTEX(rb->Mutex); + *ptr = rb; + } +} /** @@ -2148,4 +2195,3 @@ _mesa_new_depthstencil_renderbuffer(GLcontext *ctx, GLuint name) return dsrb; } - |