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140 lines
4.1 KiB
C
140 lines
4.1 KiB
C
/*
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* Mesa 3-D graphics library
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* Version: 6.5
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*
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* Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <precomp.h>
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/**
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* Initialize the fields of a gl_renderbuffer to default values.
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*/
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void
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_mesa_init_renderbuffer(struct gl_renderbuffer *rb, GLuint name)
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{
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_glthread_INIT_MUTEX(rb->Mutex);
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rb->ClassID = 0;
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rb->RefCount = 0;
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rb->Delete = _mesa_delete_renderbuffer;
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/* The rest of these should be set later by the caller of this function or
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* the AllocStorage method:
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*/
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rb->AllocStorage = NULL;
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rb->Width = 0;
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rb->Height = 0;
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rb->InternalFormat = GL_RGBA;
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rb->Format = MESA_FORMAT_NONE;
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}
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/**
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* Delete a gl_framebuffer.
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* This is the default function for renderbuffer->Delete().
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*/
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void
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_mesa_delete_renderbuffer(struct gl_renderbuffer *rb)
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{
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/* no-op */
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}
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/**
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* Attach a renderbuffer to a framebuffer.
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* \param bufferName one of the BUFFER_x tokens
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*/
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void
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_mesa_add_renderbuffer(struct gl_framebuffer *fb,
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gl_buffer_index bufferName, struct gl_renderbuffer *rb)
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{
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assert(fb);
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assert(rb);
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assert(bufferName < BUFFER_COUNT);
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/* There should be no previous renderbuffer on this attachment point,
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* with the exception of depth/stencil since the same renderbuffer may
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* be used for both.
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*/
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assert(bufferName == BUFFER_DEPTH ||
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bufferName == BUFFER_STENCIL ||
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fb->Attachment[bufferName].Renderbuffer == NULL);
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_mesa_reference_renderbuffer(&fb->Attachment[bufferName].Renderbuffer, rb);
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}
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/**
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* Remove the named renderbuffer from the given framebuffer.
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* \param bufferName one of the BUFFER_x tokens
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*/
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void
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_mesa_remove_renderbuffer(struct gl_framebuffer *fb,
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gl_buffer_index bufferName)
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{
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assert(bufferName < BUFFER_COUNT);
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_mesa_reference_renderbuffer(&fb->Attachment[bufferName].Renderbuffer,
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NULL);
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}
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/**
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* Set *ptr to point to rb. If *ptr points to another renderbuffer,
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* dereference that buffer first. The new renderbuffer's refcount will
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* be incremented. The old renderbuffer's refcount will be decremented.
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* This is normally only called from the _mesa_reference_renderbuffer() macro
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* when there's a real pointer change.
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*/
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void
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_mesa_reference_renderbuffer_(struct gl_renderbuffer **ptr,
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struct gl_renderbuffer *rb)
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{
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if (*ptr) {
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/* Unreference the old renderbuffer */
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GLboolean deleteFlag = GL_FALSE;
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struct gl_renderbuffer *oldRb = *ptr;
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_glthread_LOCK_MUTEX(oldRb->Mutex);
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ASSERT(oldRb->RefCount > 0);
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oldRb->RefCount--;
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/*printf("RB DECR %p (%d) to %d\n", (void*) oldRb, oldRb->Name, oldRb->RefCount);*/
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deleteFlag = (oldRb->RefCount == 0);
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_glthread_UNLOCK_MUTEX(oldRb->Mutex);
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if (deleteFlag) {
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oldRb->Delete(oldRb);
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}
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*ptr = NULL;
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}
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assert(!*ptr);
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if (rb) {
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/* reference new renderbuffer */
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_glthread_LOCK_MUTEX(rb->Mutex);
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rb->RefCount++;
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/*printf("RB INCR %p (%d) to %d\n", (void*) rb, rb->Name, rb->RefCount);*/
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_glthread_UNLOCK_MUTEX(rb->Mutex);
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*ptr = rb;
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}
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}
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