0,0 → 1,198 |
/* |
* 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" |
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/** |
* Initialize the fields of a gl_renderbuffer to default values. |
*/ |
void |
_mesa_init_renderbuffer(struct gl_renderbuffer *rb, GLuint name) |
{ |
GET_CURRENT_CONTEXT(ctx); |
|
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; |
|
/* In GL 3, the initial format is GL_RGBA according to Table 6.26 |
* on page 302 of the GL 3.3 spec. |
* |
* In GLES 3, the initial format is GL_RGBA4 according to Table 6.15 |
* on page 258 of the GLES 3.0.4 spec. |
* |
* If the context is current, set the initial format based on the |
* specs. If the context is not current, we cannot determine the |
* API, so default to GL_RGBA. |
*/ |
if (ctx && _mesa_is_gles3(ctx)) { |
rb->InternalFormat = GL_RGBA4; |
} else { |
rb->InternalFormat = GL_RGBA; |
} |
|
rb->Format = MESA_FORMAT_NONE; |
} |
|
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/** |
* 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; |
} |
|
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/** |
* 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); |
} |
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fb->Attachment[bufferName].Type = GL_RENDERBUFFER_EXT; |
fb->Attachment[bufferName].Complete = GL_TRUE; |
_mesa_reference_renderbuffer(&fb->Attachment[bufferName].Renderbuffer, rb); |
} |
|
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/** |
* 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); |
} |
|
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/** |
* 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); |
} |
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*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; |
} |
} |