ASSERT(rb->PutMonoValues);
/* free old buffer storage */
- if (rb->Data)
+ if (rb->Data) {
_mesa_free(rb->Data);
+ rb->Data = NULL;
+ }
- /* allocate new buffer storage */
- rb->Data = _mesa_malloc(width * height * pixelSize);
- if (rb->Data == NULL) {
- rb->Width = 0;
- rb->Height = 0;
- _mesa_error(ctx, GL_OUT_OF_MEMORY,
- "software renderbuffer allocation (%d x %d x %d)",
- width, height, pixelSize);
- return GL_FALSE;
+ if (width > 0 && height > 0) {
+ /* allocate new buffer storage */
+ rb->Data = malloc(width * height * pixelSize);
+
+ if (rb->Data == NULL) {
+ rb->Width = 0;
+ rb->Height = 0;
+ _mesa_error(ctx, GL_OUT_OF_MEMORY,
+ "software renderbuffer allocation (%d x %d x %d)",
+ width, height, pixelSize);
+ return GL_FALSE;
+ }
}
rb->Width = width;
}
+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));
+}
+
/**********************************************************************/
/**********************************************************************/
{
_glthread_INIT_MUTEX(rb->Mutex);
+ rb->Magic = RB_MAGIC;
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
rb->InternalFormat = GL_NONE;
rb->_ActualFormat = GL_NONE;
rb->_BaseFormat = GL_NONE;
- rb->DataType = GL_NONE;
+
+ rb->ComponentType = GL_UNSIGNED_NORMALIZED; /* ARB_fbo */
+ rb->ColorEncoding = GL_LINEAR; /* ARB_fbo */
+
rb->RedBits = rb->GreenBits = rb->BlueBits = rb->AlphaBits = 0;
rb->IndexBits = 0;
rb->DepthBits = 0;
rb->StencilBits = 0;
+
+ rb->DataType = GL_NONE;
rb->Data = NULL;
/* Point back to ourself so that we don't have to check for Wrapped==NULL
}
+/**
+ * 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
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);
}
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) {
- GLboolean deleteFlag = GL_FALSE;
+ assert(ptr);
+ if (*ptr == rb) {
+ /* no change */
+ return;
+ }
- _glthread_LOCK_MUTEX((*rb)->Mutex);
- ASSERT((*rb)->RefCount > 0);
- (*rb)->RefCount--;
- deleteFlag = ((*rb)->RefCount == 0);
- _glthread_UNLOCK_MUTEX((*rb)->Mutex);
+ if (*ptr) {
+ /* Unreference the old renderbuffer */
+ GLboolean deleteFlag = GL_FALSE;
+ struct gl_renderbuffer *oldRb = *ptr;
+
+ assert(oldRb->Magic == RB_MAGIC);
+ _glthread_LOCK_MUTEX(oldRb->Mutex);
+ assert(oldRb->Magic == RB_MAGIC);
+ ASSERT(oldRb->RefCount > 0);
+ oldRb->RefCount--;
+ /*printf("RB DECR %p (%d) to %d\n", (void*) oldRb, oldRb->Name, oldRb->RefCount);*/
+ deleteFlag = (oldRb->RefCount == 0);
+ _glthread_UNLOCK_MUTEX(oldRb->Mutex);
+
+ if (deleteFlag) {
+ oldRb->Magic = 0; /* now invalid memory! */
+ oldRb->Delete(oldRb);
+ }
- if (deleteFlag)
- (*rb)->Delete(*rb);
+ *ptr = NULL;
+ }
+ assert(!*ptr);
- *rb = NULL;
+ if (rb) {
+ assert(rb->Magic == RB_MAGIC);
+ /* reference new renderbuffer */
+ _glthread_LOCK_MUTEX(rb->Mutex);
+ rb->RefCount++;
+ /*printf("RB INCR %p (%d) to %d\n", (void*) rb, rb->Name, rb->RefCount);*/
+ _glthread_UNLOCK_MUTEX(rb->Mutex);
+ *ptr = rb;
}
}
-
-
/**
* Create a new combined depth/stencil renderbuffer for implementing
* the GL_EXT_packed_depth_stencil extension.
return dsrb;
}
-
projects / mesa.git / blobdiff