/* * Mesa 3-D graphics library * Version: 6.5 * * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include "glheader.h" #include "imports.h" #include "context.h" #include "fbobject.h" #include "formats.h" #include "mtypes.h" #include "renderbuffer.h" /** * Initialize the fields of a gl_renderbuffer to default values. */ void _mesa_init_renderbuffer(struct gl_renderbuffer *rb, GLuint name) { _glthread_INIT_MUTEX(rb->Mutex); rb->ClassID = 0; rb->Name = name; rb->RefCount = 0; rb->Delete = _mesa_delete_renderbuffer; /* The rest of these should be set later by the caller of this function or * the AllocStorage method: */ rb->AllocStorage = NULL; rb->Width = 0; rb->Height = 0; rb->InternalFormat = GL_RGBA; rb->Format = MESA_FORMAT_NONE; } /** * Allocate a new gl_renderbuffer object. This can be used for user-created * renderbuffers or window-system renderbuffers. */ struct gl_renderbuffer * _mesa_new_renderbuffer(struct gl_context *ctx, GLuint name) { struct gl_renderbuffer *rb = CALLOC_STRUCT(gl_renderbuffer); if (rb) { _mesa_init_renderbuffer(rb, name); } return rb; } /** * Delete a gl_framebuffer. * This is the default function for renderbuffer->Delete(). * Drivers which subclass gl_renderbuffer should probably implement their * own delete function. But the driver might also call this function to * free the object in the end. */ void _mesa_delete_renderbuffer(struct gl_context *ctx, struct gl_renderbuffer *rb) { _glthread_DESTROY_MUTEX(rb->Mutex); free(rb); } /** * Attach a renderbuffer to a framebuffer. * \param bufferName one of the BUFFER_x tokens */ void _mesa_add_renderbuffer(struct gl_framebuffer *fb, gl_buffer_index bufferName, struct gl_renderbuffer *rb) { assert(fb); assert(rb); assert(bufferName < BUFFER_COUNT); /* There should be no previous renderbuffer on this attachment point, * with the exception of depth/stencil since the same renderbuffer may * be used for both. */ assert(bufferName == BUFFER_DEPTH || bufferName == BUFFER_STENCIL || fb->Attachment[bufferName].Renderbuffer == NULL); /* winsys vs. user-created buffer cross check */ if (_mesa_is_user_fbo(fb)) { assert(rb->Name); } else { assert(!rb->Name); } fb->Attachment[bufferName].Type = GL_RENDERBUFFER_EXT; fb->Attachment[bufferName].Complete = GL_TRUE; _mesa_reference_renderbuffer(&fb->Attachment[bufferName].Renderbuffer, rb); } /** * Remove the named renderbuffer from the given framebuffer. * \param bufferName one of the BUFFER_x tokens */ void _mesa_remove_renderbuffer(struct gl_framebuffer *fb, gl_buffer_index bufferName) { assert(bufferName < BUFFER_COUNT); _mesa_reference_renderbuffer(&fb->Attachment[bufferName].Renderbuffer, NULL); } /** * 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. * This is normally only called from the _mesa_reference_renderbuffer() macro * when there's a real pointer change. */ void _mesa_reference_renderbuffer_(struct gl_renderbuffer **ptr, struct gl_renderbuffer *rb) { if (*ptr) { /* Unreference the old renderbuffer */ GLboolean deleteFlag = GL_FALSE; struct gl_renderbuffer *oldRb = *ptr; _glthread_LOCK_MUTEX(oldRb->Mutex); 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) { GET_CURRENT_CONTEXT(ctx); oldRb->Delete(ctx, oldRb); } *ptr = NULL; } assert(!*ptr); if (rb) { /* 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; } }