| /* |
| * Mesa 3-D graphics library |
| * |
| * 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 OR COPYRIGHT HOLDERS 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) |
| { |
| mtx_init(&rb->Mutex, mtx_plain); |
| |
| 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->Depth = 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) |
| { |
| mtx_destroy(&rb->Mutex); |
| free(rb->Label); |
| 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; |
| |
| mtx_lock(&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); |
| mtx_unlock(&oldRb->Mutex); |
| |
| if (deleteFlag) { |
| GET_CURRENT_CONTEXT(ctx); |
| oldRb->Delete(ctx, oldRb); |
| } |
| |
| *ptr = NULL; |
| } |
| assert(!*ptr); |
| |
| if (rb) { |
| /* reference new renderbuffer */ |
| mtx_lock(&rb->Mutex); |
| rb->RefCount++; |
| /*printf("RB INCR %p (%d) to %d\n", (void*) rb, rb->Name, rb->RefCount);*/ |
| mtx_unlock(&rb->Mutex); |
| *ptr = rb; |
| } |
| } |