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https://github.com/reactos/reactos.git
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1313 lines
37 KiB
C
1313 lines
37 KiB
C
/*
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* Mesa 3-D graphics library
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* Version: 7.6
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*
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* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
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* Copyright (C) 2009 VMware, Inc. 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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/**
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* \file bufferobj.c
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* \brief Functions for the GL_ARB_vertex/pixel_buffer_object extensions.
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* \author Brian Paul, Ian Romanick
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*/
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#include <precomp.h>
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/* Debug flags */
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/*#define VBO_DEBUG*/
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/*#define BOUNDS_CHECK*/
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/**
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* Used as a placeholder for buffer objects between glGenBuffers() and
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* glBindBuffer() so that glIsBuffer() can work correctly.
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*/
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static struct gl_buffer_object DummyBufferObject;
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/**
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* Return pointer to address of a buffer object target.
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* \param ctx the GL context
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* \param target the buffer object target to be retrieved.
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* \return pointer to pointer to the buffer object bound to \c target in the
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* specified context or \c NULL if \c target is invalid.
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*/
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static inline struct gl_buffer_object **
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get_buffer_target(struct gl_context *ctx, GLenum target)
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{
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switch (target) {
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case GL_ELEMENT_ARRAY_BUFFER_ARB:
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return &ctx->Array.ElementArrayBufferObj;
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default:
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return NULL;
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}
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return NULL;
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}
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/**
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* Get the buffer object bound to the specified target in a GL context.
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* \param ctx the GL context
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* \param target the buffer object target to be retrieved.
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* \return pointer to the buffer object bound to \c target in the
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* specified context or \c NULL if \c target is invalid.
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*/
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static inline struct gl_buffer_object *
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get_buffer(struct gl_context *ctx, const char *func, GLenum target)
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{
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struct gl_buffer_object **bufObj = get_buffer_target(ctx, target);
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if (!bufObj) {
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_mesa_error(ctx, GL_INVALID_ENUM, "%s(target)", func);
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return NULL;
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}
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if (!_mesa_is_bufferobj(*bufObj)) {
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_mesa_error(ctx, GL_INVALID_OPERATION, "%s(buffer 0)", func);
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return NULL;
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}
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return *bufObj;
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}
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static inline GLenum
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default_access_mode(const struct gl_context *ctx)
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{
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(void)ctx;
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return GL_MAP_READ_BIT | GL_MAP_WRITE_BIT;
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}
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/**
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* Convert a GLbitfield describing the mapped buffer access flags
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* into one of GL_READ_WRITE, GL_READ_ONLY, or GL_WRITE_ONLY.
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*/
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static GLenum
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simplified_access_mode(GLbitfield access)
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{
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const GLbitfield rwFlags = GL_MAP_READ_BIT | GL_MAP_WRITE_BIT;
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if ((access & rwFlags) == rwFlags)
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return GL_READ_WRITE;
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if ((access & GL_MAP_READ_BIT) == GL_MAP_READ_BIT)
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return GL_READ_ONLY;
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if ((access & GL_MAP_WRITE_BIT) == GL_MAP_WRITE_BIT)
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return GL_WRITE_ONLY;
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return GL_READ_WRITE; /* this should never happen, but no big deal */
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}
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/**
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* Tests the subdata range parameters and sets the GL error code for
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* \c glBufferSubDataARB and \c glGetBufferSubDataARB.
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*
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* \param ctx GL context.
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* \param target Buffer object target on which to operate.
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* \param offset Offset of the first byte of the subdata range.
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* \param size Size, in bytes, of the subdata range.
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* \param caller Name of calling function for recording errors.
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* \return A pointer to the buffer object bound to \c target in the
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* specified context or \c NULL if any of the parameter or state
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* conditions for \c glBufferSubDataARB or \c glGetBufferSubDataARB
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* are invalid.
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*
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* \sa glBufferSubDataARB, glGetBufferSubDataARB
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*/
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static struct gl_buffer_object *
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buffer_object_subdata_range_good( struct gl_context * ctx, GLenum target,
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GLintptrARB offset, GLsizeiptrARB size,
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const char *caller )
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{
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struct gl_buffer_object *bufObj;
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if (size < 0) {
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_mesa_error(ctx, GL_INVALID_VALUE, "%s(size < 0)", caller);
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return NULL;
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}
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if (offset < 0) {
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_mesa_error(ctx, GL_INVALID_VALUE, "%s(offset < 0)", caller);
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return NULL;
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}
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bufObj = get_buffer(ctx, caller, target);
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if (!bufObj)
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return NULL;
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if (offset + size > bufObj->Size) {
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_mesa_error(ctx, GL_INVALID_VALUE,
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"%s(offset %lu + size %lu > buffer size %lu)", caller,
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(unsigned long) offset,
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(unsigned long) size,
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(unsigned long) bufObj->Size);
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return NULL;
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}
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if (_mesa_bufferobj_mapped(bufObj)) {
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/* Buffer is currently mapped */
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_mesa_error(ctx, GL_INVALID_OPERATION, "%s", caller);
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return NULL;
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}
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return bufObj;
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}
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/**
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* Allocate and initialize a new buffer object.
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*
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* Default callback for the \c dd_function_table::NewBufferObject() hook.
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*/
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static struct gl_buffer_object *
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_mesa_new_buffer_object( struct gl_context *ctx, GLuint name, GLenum target )
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{
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struct gl_buffer_object *obj;
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(void) ctx;
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obj = MALLOC_STRUCT(gl_buffer_object);
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_mesa_initialize_buffer_object(ctx, obj, name, target);
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return obj;
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}
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/**
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* Delete a buffer object.
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*
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* Default callback for the \c dd_function_table::DeleteBuffer() hook.
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*/
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static void
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_mesa_delete_buffer_object(struct gl_context *ctx,
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struct gl_buffer_object *bufObj)
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{
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(void) ctx;
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if (bufObj->Data)
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free(bufObj->Data);
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/* assign strange values here to help w/ debugging */
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bufObj->RefCount = -1000;
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bufObj->Name = ~0;
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_glthread_DESTROY_MUTEX(bufObj->Mutex);
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free(bufObj);
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}
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/**
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* Set ptr to bufObj w/ reference counting.
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* This is normally only called from the _mesa_reference_buffer_object() 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_buffer_object_(struct gl_context *ctx,
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struct gl_buffer_object **ptr,
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struct gl_buffer_object *bufObj)
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{
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if (*ptr) {
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/* Unreference the old buffer */
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GLboolean deleteFlag = GL_FALSE;
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struct gl_buffer_object *oldObj = *ptr;
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_glthread_LOCK_MUTEX(oldObj->Mutex);
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ASSERT(oldObj->RefCount > 0);
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oldObj->RefCount--;
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#if 0
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printf("BufferObj %p %d DECR to %d\n",
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(void *) oldObj, oldObj->Name, oldObj->RefCount);
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#endif
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deleteFlag = (oldObj->RefCount == 0);
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_glthread_UNLOCK_MUTEX(oldObj->Mutex);
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if (deleteFlag) {
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/* some sanity checking: don't delete a buffer still in use */
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#if 0
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/* unfortunately, these tests are invalid during context tear-down */
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ASSERT(ctx->Array.ArrayBufferObj != bufObj);
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ASSERT(ctx->Array.ArrayObj->ElementArrayBufferObj != bufObj);
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ASSERT(ctx->Array.ArrayObj->Vertex.BufferObj != bufObj);
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#endif
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ASSERT(ctx->Driver.DeleteBuffer);
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ctx->Driver.DeleteBuffer(ctx, oldObj);
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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 (bufObj) {
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/* reference new buffer */
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_glthread_LOCK_MUTEX(bufObj->Mutex);
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if (bufObj->RefCount == 0) {
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/* this buffer's being deleted (look just above) */
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/* Not sure this can every really happen. Warn if it does. */
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_mesa_problem(NULL, "referencing deleted buffer object");
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*ptr = NULL;
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}
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else {
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bufObj->RefCount++;
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#if 0
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printf("BufferObj %p %d INCR to %d\n",
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(void *) bufObj, bufObj->Name, bufObj->RefCount);
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#endif
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*ptr = bufObj;
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}
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_glthread_UNLOCK_MUTEX(bufObj->Mutex);
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}
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}
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/**
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* Initialize a buffer object to default values.
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*/
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void
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_mesa_initialize_buffer_object( struct gl_context *ctx,
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struct gl_buffer_object *obj,
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GLuint name, GLenum target )
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{
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(void) target;
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memset(obj, 0, sizeof(struct gl_buffer_object));
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_glthread_INIT_MUTEX(obj->Mutex);
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obj->RefCount = 1;
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obj->Name = name;
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obj->Usage = GL_STATIC_DRAW_ARB;
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obj->AccessFlags = default_access_mode(ctx);
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}
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/**
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* Allocate space for and store data in a buffer object. Any data that was
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* previously stored in the buffer object is lost. If \c data is \c NULL,
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* memory will be allocated, but no copy will occur.
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*
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* This is the default callback for \c dd_function_table::BufferData()
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* Note that all GL error checking will have been done already.
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*
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* \param ctx GL context.
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* \param target Buffer object target on which to operate.
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* \param size Size, in bytes, of the new data store.
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* \param data Pointer to the data to store in the buffer object. This
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* pointer may be \c NULL.
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* \param usage Hints about how the data will be used.
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* \param bufObj Object to be used.
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*
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* \return GL_TRUE for success, GL_FALSE for failure
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* \sa glBufferDataARB, dd_function_table::BufferData.
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*/
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static GLboolean
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_mesa_buffer_data( struct gl_context *ctx, GLenum target, GLsizeiptrARB size,
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const GLvoid * data, GLenum usage,
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struct gl_buffer_object * bufObj )
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{
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void * new_data;
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(void) ctx; (void) target;
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new_data = _mesa_realloc( bufObj->Data, bufObj->Size, size );
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if (new_data) {
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bufObj->Data = (GLubyte *) new_data;
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bufObj->Size = size;
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bufObj->Usage = usage;
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if (data) {
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memcpy( bufObj->Data, data, size );
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}
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return GL_TRUE;
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}
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else {
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return GL_FALSE;
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}
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}
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/**
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* Replace data in a subrange of buffer object. If the data range
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* specified by \c size + \c offset extends beyond the end of the buffer or
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* if \c data is \c NULL, no copy is performed.
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*
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* This is the default callback for \c dd_function_table::BufferSubData()
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* Note that all GL error checking will have been done already.
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*
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* \param ctx GL context.
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* \param target Buffer object target on which to operate.
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* \param offset Offset of the first byte to be modified.
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* \param size Size, in bytes, of the data range.
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* \param data Pointer to the data to store in the buffer object.
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* \param bufObj Object to be used.
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*
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* \sa glBufferSubDataARB, dd_function_table::BufferSubData.
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*/
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static void
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_mesa_buffer_subdata( struct gl_context *ctx, GLintptrARB offset,
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GLsizeiptrARB size, const GLvoid * data,
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struct gl_buffer_object * bufObj )
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{
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(void) ctx;
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/* this should have been caught in _mesa_BufferSubData() */
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ASSERT(size + offset <= bufObj->Size);
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if (bufObj->Data) {
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memcpy( (GLubyte *) bufObj->Data + offset, data, size );
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}
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}
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/**
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* Retrieve data from a subrange of buffer object. If the data range
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* specified by \c size + \c offset extends beyond the end of the buffer or
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* if \c data is \c NULL, no copy is performed.
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*
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* This is the default callback for \c dd_function_table::GetBufferSubData()
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* Note that all GL error checking will have been done already.
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*
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* \param ctx GL context.
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* \param target Buffer object target on which to operate.
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* \param offset Offset of the first byte to be fetched.
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* \param size Size, in bytes, of the data range.
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* \param data Destination for data
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* \param bufObj Object to be used.
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*
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* \sa glBufferGetSubDataARB, dd_function_table::GetBufferSubData.
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*/
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static void
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_mesa_buffer_get_subdata( struct gl_context *ctx, GLintptrARB offset,
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GLsizeiptrARB size, GLvoid * data,
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struct gl_buffer_object * bufObj )
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{
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(void) ctx;
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if (bufObj->Data && ((GLsizeiptrARB) (size + offset) <= bufObj->Size)) {
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memcpy( data, (GLubyte *) bufObj->Data + offset, size );
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}
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}
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/**
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* Default fallback for \c dd_function_table::MapBufferRange().
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* Called via glMapBufferRange().
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*/
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static void *
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_mesa_buffer_map_range( struct gl_context *ctx, GLintptr offset,
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GLsizeiptr length, GLbitfield access,
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struct gl_buffer_object *bufObj )
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{
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(void) ctx;
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assert(!_mesa_bufferobj_mapped(bufObj));
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/* Just return a direct pointer to the data */
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bufObj->Pointer = bufObj->Data + offset;
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bufObj->Length = length;
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bufObj->Offset = offset;
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bufObj->AccessFlags = access;
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return bufObj->Pointer;
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}
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/**
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* Default fallback for \c dd_function_table::FlushMappedBufferRange().
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* Called via glFlushMappedBufferRange().
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*/
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static void
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_mesa_buffer_flush_mapped_range( struct gl_context *ctx,
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GLintptr offset, GLsizeiptr length,
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struct gl_buffer_object *obj )
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{
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(void) ctx;
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(void) offset;
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(void) length;
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(void) obj;
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/* no-op */
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}
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/**
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* Default callback for \c dd_function_table::MapBuffer().
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*
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* The input parameters will have been already tested for errors.
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*
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* \sa glUnmapBufferARB, dd_function_table::UnmapBuffer
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*/
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static GLboolean
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_mesa_buffer_unmap( struct gl_context *ctx, struct gl_buffer_object *bufObj )
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{
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(void) ctx;
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/* XXX we might assert here that bufObj->Pointer is non-null */
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bufObj->Pointer = NULL;
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bufObj->Length = 0;
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bufObj->Offset = 0;
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bufObj->AccessFlags = 0x0;
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return GL_TRUE;
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}
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/**
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* Initialize the state associated with buffer objects
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*/
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void
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_mesa_init_buffer_objects( struct gl_context *ctx )
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{
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memset(&DummyBufferObject, 0, sizeof(DummyBufferObject));
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_glthread_INIT_MUTEX(DummyBufferObject.Mutex);
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DummyBufferObject.RefCount = 1000*1000*1000; /* never delete */
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}
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/**
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* Bind the specified target to buffer for the specified context.
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* Called by glBindBuffer() and other functions.
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*/
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static void
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bind_buffer_object(struct gl_context *ctx, GLenum target, GLuint buffer)
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{
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struct gl_buffer_object *oldBufObj;
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struct gl_buffer_object *newBufObj = NULL;
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struct gl_buffer_object **bindTarget = NULL;
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bindTarget = get_buffer_target(ctx, target);
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if (!bindTarget) {
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_mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferARB(target 0x%x)", target);
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return;
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}
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/* Get pointer to old buffer object (to be unbound) */
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oldBufObj = *bindTarget;
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if (oldBufObj && oldBufObj->Name == buffer && !oldBufObj->DeletePending)
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return; /* rebinding the same buffer object- no change */
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/*
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* Get pointer to new buffer object (newBufObj)
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*/
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if (buffer == 0) {
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/* The spec says there's not a buffer object named 0, but we use
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* one internally because it simplifies things.
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*/
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newBufObj = ctx->Shared->NullBufferObj;
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}
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else {
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/* non-default buffer object */
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newBufObj = _mesa_lookup_bufferobj(ctx, buffer);
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if (!newBufObj || newBufObj == &DummyBufferObject) {
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/* If this is a new buffer object id, or one which was generated but
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* never used before, allocate a buffer object now.
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*/
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ASSERT(ctx->Driver.NewBufferObject);
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newBufObj = ctx->Driver.NewBufferObject(ctx, buffer, target);
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|
if (!newBufObj) {
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_mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindBufferARB");
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return;
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}
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_mesa_HashInsert(ctx->Shared->BufferObjects, buffer, newBufObj);
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}
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}
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|
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/* bind new buffer */
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_mesa_reference_buffer_object(ctx, bindTarget, newBufObj);
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|
|
/* Pass BindBuffer call to device driver */
|
|
if (ctx->Driver.BindBuffer)
|
|
ctx->Driver.BindBuffer( ctx, target, newBufObj );
|
|
}
|
|
|
|
|
|
/**
|
|
* Update the default buffer objects in the given context to reference those
|
|
* specified in the shared state and release those referencing the old
|
|
* shared state.
|
|
*/
|
|
void
|
|
_mesa_update_default_objects_buffer_objects(struct gl_context *ctx)
|
|
{
|
|
/* Bind the NullBufferObj to remove references to those
|
|
* in the shared context hash table.
|
|
*/
|
|
bind_buffer_object( ctx, GL_ARRAY_BUFFER_ARB, 0);
|
|
bind_buffer_object( ctx, GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Return the gl_buffer_object for the given ID.
|
|
* Always return NULL for ID 0.
|
|
*/
|
|
struct gl_buffer_object *
|
|
_mesa_lookup_bufferobj(struct gl_context *ctx, GLuint buffer)
|
|
{
|
|
if (buffer == 0)
|
|
return NULL;
|
|
else
|
|
return (struct gl_buffer_object *)
|
|
_mesa_HashLookup(ctx->Shared->BufferObjects, buffer);
|
|
}
|
|
|
|
|
|
/**
|
|
* If *ptr points to obj, set ptr = the Null/default buffer object.
|
|
* This is a helper for buffer object deletion.
|
|
* The GL spec says that deleting a buffer object causes it to get
|
|
* unbound from all arrays in the current context.
|
|
*/
|
|
static void
|
|
unbind(struct gl_context *ctx,
|
|
struct gl_buffer_object **ptr,
|
|
struct gl_buffer_object *obj)
|
|
{
|
|
if (*ptr == obj) {
|
|
_mesa_reference_buffer_object(ctx, ptr, ctx->Shared->NullBufferObj);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Plug default/fallback buffer object functions into the device
|
|
* driver hooks.
|
|
*/
|
|
void
|
|
_mesa_init_buffer_object_functions(struct dd_function_table *driver)
|
|
{
|
|
/* GL_ARB_vertex/pixel_buffer_object */
|
|
driver->NewBufferObject = _mesa_new_buffer_object;
|
|
driver->DeleteBuffer = _mesa_delete_buffer_object;
|
|
driver->BindBuffer = NULL;
|
|
driver->BufferData = _mesa_buffer_data;
|
|
driver->BufferSubData = _mesa_buffer_subdata;
|
|
driver->GetBufferSubData = _mesa_buffer_get_subdata;
|
|
driver->UnmapBuffer = _mesa_buffer_unmap;
|
|
|
|
/* GL_ARB_map_buffer_range */
|
|
driver->MapBufferRange = _mesa_buffer_map_range;
|
|
driver->FlushMappedBufferRange = _mesa_buffer_flush_mapped_range;
|
|
}
|
|
|
|
|
|
|
|
/**********************************************************************/
|
|
/* API Functions */
|
|
/**********************************************************************/
|
|
|
|
void GLAPIENTRY
|
|
_mesa_BindBufferARB(GLenum target, GLuint buffer)
|
|
{
|
|
GET_CURRENT_CONTEXT(ctx);
|
|
ASSERT_OUTSIDE_BEGIN_END(ctx);
|
|
|
|
if (MESA_VERBOSE & VERBOSE_API)
|
|
_mesa_debug(ctx, "glBindBuffer(%s, %u)\n",
|
|
_mesa_lookup_enum_by_nr(target), buffer);
|
|
|
|
bind_buffer_object(ctx, target, buffer);
|
|
}
|
|
|
|
|
|
/**
|
|
* Delete a set of buffer objects.
|
|
*
|
|
* \param n Number of buffer objects to delete.
|
|
* \param ids Array of \c n buffer object IDs.
|
|
*/
|
|
void GLAPIENTRY
|
|
_mesa_DeleteBuffersARB(GLsizei n, const GLuint *ids)
|
|
{
|
|
GET_CURRENT_CONTEXT(ctx);
|
|
GLsizei i;
|
|
ASSERT_OUTSIDE_BEGIN_END(ctx);
|
|
FLUSH_VERTICES(ctx, 0);
|
|
|
|
if (n < 0) {
|
|
_mesa_error(ctx, GL_INVALID_VALUE, "glDeleteBuffersARB(n)");
|
|
return;
|
|
}
|
|
|
|
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
|
|
|
|
for (i = 0; i < n; i++) {
|
|
struct gl_buffer_object *bufObj = _mesa_lookup_bufferobj(ctx, ids[i]);
|
|
if (bufObj) {
|
|
GLuint j;
|
|
|
|
ASSERT(bufObj->Name == ids[i] || bufObj == &DummyBufferObject);
|
|
|
|
if (_mesa_bufferobj_mapped(bufObj)) {
|
|
/* if mapped, unmap it now */
|
|
ctx->Driver.UnmapBuffer(ctx, bufObj);
|
|
bufObj->AccessFlags = default_access_mode(ctx);
|
|
bufObj->Pointer = NULL;
|
|
}
|
|
|
|
/* unbind any vertex pointers bound to this buffer */
|
|
for (j = 0; j < Elements(ctx->Array.VertexAttrib); j++) {
|
|
unbind(ctx, &ctx->Array.VertexAttrib[j].BufferObj, bufObj);
|
|
}
|
|
|
|
if (ctx->Array.ElementArrayBufferObj == bufObj) {
|
|
_mesa_BindBufferARB( GL_ELEMENT_ARRAY_BUFFER_ARB, 0 );
|
|
}
|
|
|
|
/* The ID is immediately freed for re-use */
|
|
_mesa_HashRemove(ctx->Shared->BufferObjects, ids[i]);
|
|
/* Make sure we do not run into the classic ABA problem on bind.
|
|
* We don't want to allow re-binding a buffer object that's been
|
|
* "deleted" by glDeleteBuffers().
|
|
*
|
|
* The explicit rebinding to the default object in the current context
|
|
* prevents the above in the current context, but another context
|
|
* sharing the same objects might suffer from this problem.
|
|
* The alternative would be to do the hash lookup in any case on bind
|
|
* which would introduce more runtime overhead than this.
|
|
*/
|
|
bufObj->DeletePending = GL_TRUE;
|
|
_mesa_reference_buffer_object(ctx, &bufObj, NULL);
|
|
}
|
|
}
|
|
|
|
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
|
|
}
|
|
|
|
|
|
/**
|
|
* Generate a set of unique buffer object IDs and store them in \c buffer.
|
|
*
|
|
* \param n Number of IDs to generate.
|
|
* \param buffer Array of \c n locations to store the IDs.
|
|
*/
|
|
void GLAPIENTRY
|
|
_mesa_GenBuffersARB(GLsizei n, GLuint *buffer)
|
|
{
|
|
GET_CURRENT_CONTEXT(ctx);
|
|
GLuint first;
|
|
GLint i;
|
|
ASSERT_OUTSIDE_BEGIN_END(ctx);
|
|
|
|
if (MESA_VERBOSE & VERBOSE_API)
|
|
_mesa_debug(ctx, "glGenBuffers(%d)\n", n);
|
|
|
|
if (n < 0) {
|
|
_mesa_error(ctx, GL_INVALID_VALUE, "glGenBuffersARB");
|
|
return;
|
|
}
|
|
|
|
if (!buffer) {
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* This must be atomic (generation and allocation of buffer object IDs)
|
|
*/
|
|
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
|
|
|
|
first = _mesa_HashFindFreeKeyBlock(ctx->Shared->BufferObjects, n);
|
|
|
|
/* Insert the ID and pointer to dummy buffer object into hash table */
|
|
for (i = 0; i < n; i++) {
|
|
_mesa_HashInsert(ctx->Shared->BufferObjects, first + i,
|
|
&DummyBufferObject);
|
|
buffer[i] = first + i;
|
|
}
|
|
|
|
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
|
|
}
|
|
|
|
|
|
/**
|
|
* Determine if ID is the name of a buffer object.
|
|
*
|
|
* \param id ID of the potential buffer object.
|
|
* \return \c GL_TRUE if \c id is the name of a buffer object,
|
|
* \c GL_FALSE otherwise.
|
|
*/
|
|
GLboolean GLAPIENTRY
|
|
_mesa_IsBufferARB(GLuint id)
|
|
{
|
|
struct gl_buffer_object *bufObj;
|
|
GET_CURRENT_CONTEXT(ctx);
|
|
ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
|
|
|
|
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
|
|
bufObj = _mesa_lookup_bufferobj(ctx, id);
|
|
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
|
|
|
|
return bufObj && bufObj != &DummyBufferObject;
|
|
}
|
|
|
|
|
|
void GLAPIENTRY
|
|
_mesa_BufferDataARB(GLenum target, GLsizeiptrARB size,
|
|
const GLvoid * data, GLenum usage)
|
|
{
|
|
GET_CURRENT_CONTEXT(ctx);
|
|
struct gl_buffer_object *bufObj;
|
|
ASSERT_OUTSIDE_BEGIN_END(ctx);
|
|
|
|
if (MESA_VERBOSE & VERBOSE_API)
|
|
_mesa_debug(ctx, "glBufferData(%s, %ld, %p, %s)\n",
|
|
_mesa_lookup_enum_by_nr(target),
|
|
(long int) size, data,
|
|
_mesa_lookup_enum_by_nr(usage));
|
|
|
|
if (size < 0) {
|
|
_mesa_error(ctx, GL_INVALID_VALUE, "glBufferDataARB(size < 0)");
|
|
return;
|
|
}
|
|
|
|
switch (usage) {
|
|
case GL_STREAM_DRAW_ARB:
|
|
case GL_STREAM_READ_ARB:
|
|
case GL_STREAM_COPY_ARB:
|
|
case GL_STATIC_DRAW_ARB:
|
|
case GL_STATIC_READ_ARB:
|
|
case GL_STATIC_COPY_ARB:
|
|
case GL_DYNAMIC_DRAW_ARB:
|
|
case GL_DYNAMIC_READ_ARB:
|
|
case GL_DYNAMIC_COPY_ARB:
|
|
/* OK */
|
|
break;
|
|
default:
|
|
_mesa_error(ctx, GL_INVALID_ENUM, "glBufferDataARB(usage)");
|
|
return;
|
|
}
|
|
|
|
bufObj = get_buffer(ctx, "glBufferDataARB", target);
|
|
if (!bufObj)
|
|
return;
|
|
|
|
if (_mesa_bufferobj_mapped(bufObj)) {
|
|
/* Unmap the existing buffer. We'll replace it now. Not an error. */
|
|
ctx->Driver.UnmapBuffer(ctx, bufObj);
|
|
bufObj->AccessFlags = default_access_mode(ctx);
|
|
ASSERT(bufObj->Pointer == NULL);
|
|
}
|
|
|
|
FLUSH_VERTICES(ctx, _NEW_BUFFER_OBJECT);
|
|
|
|
bufObj->Written = GL_TRUE;
|
|
|
|
#ifdef VBO_DEBUG
|
|
printf("glBufferDataARB(%u, sz %ld, from %p, usage 0x%x)\n",
|
|
bufObj->Name, size, data, usage);
|
|
#endif
|
|
|
|
#ifdef BOUNDS_CHECK
|
|
size += 100;
|
|
#endif
|
|
|
|
ASSERT(ctx->Driver.BufferData);
|
|
if (!ctx->Driver.BufferData( ctx, target, size, data, usage, bufObj )) {
|
|
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glBufferDataARB()");
|
|
}
|
|
}
|
|
|
|
|
|
void GLAPIENTRY
|
|
_mesa_BufferSubDataARB(GLenum target, GLintptrARB offset,
|
|
GLsizeiptrARB size, const GLvoid * data)
|
|
{
|
|
GET_CURRENT_CONTEXT(ctx);
|
|
struct gl_buffer_object *bufObj;
|
|
ASSERT_OUTSIDE_BEGIN_END(ctx);
|
|
|
|
bufObj = buffer_object_subdata_range_good( ctx, target, offset, size,
|
|
"glBufferSubDataARB" );
|
|
if (!bufObj) {
|
|
/* error already recorded */
|
|
return;
|
|
}
|
|
|
|
if (size == 0)
|
|
return;
|
|
|
|
bufObj->Written = GL_TRUE;
|
|
|
|
ASSERT(ctx->Driver.BufferSubData);
|
|
ctx->Driver.BufferSubData( ctx, offset, size, data, bufObj );
|
|
}
|
|
|
|
|
|
void GLAPIENTRY
|
|
_mesa_GetBufferSubDataARB(GLenum target, GLintptrARB offset,
|
|
GLsizeiptrARB size, void * data)
|
|
{
|
|
GET_CURRENT_CONTEXT(ctx);
|
|
struct gl_buffer_object *bufObj;
|
|
ASSERT_OUTSIDE_BEGIN_END(ctx);
|
|
|
|
bufObj = buffer_object_subdata_range_good( ctx, target, offset, size,
|
|
"glGetBufferSubDataARB" );
|
|
if (!bufObj) {
|
|
/* error already recorded */
|
|
return;
|
|
}
|
|
|
|
ASSERT(ctx->Driver.GetBufferSubData);
|
|
ctx->Driver.GetBufferSubData( ctx, offset, size, data, bufObj );
|
|
}
|
|
|
|
|
|
void * GLAPIENTRY
|
|
_mesa_MapBufferARB(GLenum target, GLenum access)
|
|
{
|
|
GET_CURRENT_CONTEXT(ctx);
|
|
struct gl_buffer_object * bufObj;
|
|
GLbitfield accessFlags;
|
|
void *map;
|
|
|
|
ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
|
|
|
|
switch (access) {
|
|
case GL_READ_ONLY_ARB:
|
|
accessFlags = GL_MAP_READ_BIT;
|
|
break;
|
|
case GL_WRITE_ONLY_ARB:
|
|
accessFlags = GL_MAP_WRITE_BIT;
|
|
break;
|
|
case GL_READ_WRITE_ARB:
|
|
accessFlags = GL_MAP_READ_BIT | GL_MAP_WRITE_BIT;
|
|
break;
|
|
default:
|
|
_mesa_error(ctx, GL_INVALID_ENUM, "glMapBufferARB(access)");
|
|
return NULL;
|
|
}
|
|
|
|
bufObj = get_buffer(ctx, "glMapBufferARB", target);
|
|
if (!bufObj)
|
|
return NULL;
|
|
|
|
if (_mesa_bufferobj_mapped(bufObj)) {
|
|
_mesa_error(ctx, GL_INVALID_OPERATION, "glMapBufferARB(already mapped)");
|
|
return NULL;
|
|
}
|
|
|
|
if (!bufObj->Size) {
|
|
_mesa_error(ctx, GL_OUT_OF_MEMORY,
|
|
"glMapBuffer(buffer size = 0)");
|
|
return NULL;
|
|
}
|
|
|
|
ASSERT(ctx->Driver.MapBufferRange);
|
|
map = ctx->Driver.MapBufferRange(ctx, 0, bufObj->Size, accessFlags, bufObj);
|
|
if (!map) {
|
|
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glMapBufferARB(map failed)");
|
|
return NULL;
|
|
}
|
|
else {
|
|
/* The driver callback should have set these fields.
|
|
* This is important because other modules (like VBO) might call
|
|
* the driver function directly.
|
|
*/
|
|
ASSERT(bufObj->Pointer == map);
|
|
ASSERT(bufObj->Length == bufObj->Size);
|
|
ASSERT(bufObj->Offset == 0);
|
|
bufObj->AccessFlags = accessFlags;
|
|
}
|
|
|
|
if (access == GL_WRITE_ONLY_ARB || access == GL_READ_WRITE_ARB)
|
|
bufObj->Written = GL_TRUE;
|
|
|
|
#ifdef VBO_DEBUG
|
|
printf("glMapBufferARB(%u, sz %ld, access 0x%x)\n",
|
|
bufObj->Name, bufObj->Size, access);
|
|
if (access == GL_WRITE_ONLY_ARB) {
|
|
GLuint i;
|
|
GLubyte *b = (GLubyte *) bufObj->Pointer;
|
|
for (i = 0; i < bufObj->Size; i++)
|
|
b[i] = i & 0xff;
|
|
}
|
|
#endif
|
|
|
|
#ifdef BOUNDS_CHECK
|
|
{
|
|
GLubyte *buf = (GLubyte *) bufObj->Pointer;
|
|
GLuint i;
|
|
/* buffer is 100 bytes larger than requested, fill with magic value */
|
|
for (i = 0; i < 100; i++) {
|
|
buf[bufObj->Size - i - 1] = 123;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return bufObj->Pointer;
|
|
}
|
|
|
|
|
|
GLboolean GLAPIENTRY
|
|
_mesa_UnmapBufferARB(GLenum target)
|
|
{
|
|
GET_CURRENT_CONTEXT(ctx);
|
|
struct gl_buffer_object *bufObj;
|
|
GLboolean status = GL_TRUE;
|
|
ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
|
|
|
|
bufObj = get_buffer(ctx, "glUnmapBufferARB", target);
|
|
if (!bufObj)
|
|
return GL_FALSE;
|
|
|
|
if (!_mesa_bufferobj_mapped(bufObj)) {
|
|
_mesa_error(ctx, GL_INVALID_OPERATION, "glUnmapBufferARB");
|
|
return GL_FALSE;
|
|
}
|
|
|
|
#ifdef BOUNDS_CHECK
|
|
if (bufObj->Access != GL_READ_ONLY_ARB) {
|
|
GLubyte *buf = (GLubyte *) bufObj->Pointer;
|
|
GLuint i;
|
|
/* check that last 100 bytes are still = magic value */
|
|
for (i = 0; i < 100; i++) {
|
|
GLuint pos = bufObj->Size - i - 1;
|
|
if (buf[pos] != 123) {
|
|
_mesa_warning(ctx, "Out of bounds buffer object write detected"
|
|
" at position %d (value = %u)\n",
|
|
pos, buf[pos]);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef VBO_DEBUG
|
|
if (bufObj->AccessFlags & GL_MAP_WRITE_BIT) {
|
|
GLuint i, unchanged = 0;
|
|
GLubyte *b = (GLubyte *) bufObj->Pointer;
|
|
GLint pos = -1;
|
|
/* check which bytes changed */
|
|
for (i = 0; i < bufObj->Size - 1; i++) {
|
|
if (b[i] == (i & 0xff) && b[i+1] == ((i+1) & 0xff)) {
|
|
unchanged++;
|
|
if (pos == -1)
|
|
pos = i;
|
|
}
|
|
}
|
|
if (unchanged) {
|
|
printf("glUnmapBufferARB(%u): %u of %ld unchanged, starting at %d\n",
|
|
bufObj->Name, unchanged, bufObj->Size, pos);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
status = ctx->Driver.UnmapBuffer( ctx, bufObj );
|
|
bufObj->AccessFlags = default_access_mode(ctx);
|
|
ASSERT(bufObj->Pointer == NULL);
|
|
ASSERT(bufObj->Offset == 0);
|
|
ASSERT(bufObj->Length == 0);
|
|
|
|
return status;
|
|
}
|
|
|
|
|
|
void GLAPIENTRY
|
|
_mesa_GetBufferParameterivARB(GLenum target, GLenum pname, GLint *params)
|
|
{
|
|
GET_CURRENT_CONTEXT(ctx);
|
|
struct gl_buffer_object *bufObj;
|
|
ASSERT_OUTSIDE_BEGIN_END(ctx);
|
|
|
|
bufObj = get_buffer(ctx, "glGetBufferParameterivARB", target);
|
|
if (!bufObj)
|
|
return;
|
|
|
|
switch (pname) {
|
|
case GL_BUFFER_SIZE_ARB:
|
|
*params = (GLint) bufObj->Size;
|
|
return;
|
|
case GL_BUFFER_USAGE_ARB:
|
|
*params = bufObj->Usage;
|
|
return;
|
|
case GL_BUFFER_ACCESS_ARB:
|
|
*params = simplified_access_mode(bufObj->AccessFlags);
|
|
return;
|
|
case GL_BUFFER_MAPPED_ARB:
|
|
*params = _mesa_bufferobj_mapped(bufObj);
|
|
return;
|
|
case GL_BUFFER_ACCESS_FLAGS:
|
|
if (!ctx->Extensions.ARB_map_buffer_range)
|
|
goto invalid_pname;
|
|
*params = bufObj->AccessFlags;
|
|
return;
|
|
case GL_BUFFER_MAP_OFFSET:
|
|
if (!ctx->Extensions.ARB_map_buffer_range)
|
|
goto invalid_pname;
|
|
*params = (GLint) bufObj->Offset;
|
|
return;
|
|
case GL_BUFFER_MAP_LENGTH:
|
|
if (!ctx->Extensions.ARB_map_buffer_range)
|
|
goto invalid_pname;
|
|
*params = (GLint) bufObj->Length;
|
|
return;
|
|
default:
|
|
; /* fall-through */
|
|
}
|
|
|
|
invalid_pname:
|
|
_mesa_error(ctx, GL_INVALID_ENUM, "glGetBufferParameterivARB(pname=%s)",
|
|
_mesa_lookup_enum_by_nr(pname));
|
|
}
|
|
|
|
|
|
/**
|
|
* New in GL 3.2
|
|
* This is pretty much a duplicate of GetBufferParameteriv() but the
|
|
* GL_BUFFER_SIZE_ARB attribute will be 64-bits on a 64-bit system.
|
|
*/
|
|
void GLAPIENTRY
|
|
_mesa_GetBufferParameteri64v(GLenum target, GLenum pname, GLint64 *params)
|
|
{
|
|
GET_CURRENT_CONTEXT(ctx);
|
|
struct gl_buffer_object *bufObj;
|
|
ASSERT_OUTSIDE_BEGIN_END(ctx);
|
|
|
|
bufObj = get_buffer(ctx, "glGetBufferParameteri64v", target);
|
|
if (!bufObj)
|
|
return;
|
|
|
|
switch (pname) {
|
|
case GL_BUFFER_SIZE_ARB:
|
|
*params = bufObj->Size;
|
|
return;
|
|
case GL_BUFFER_USAGE_ARB:
|
|
*params = bufObj->Usage;
|
|
return;
|
|
case GL_BUFFER_ACCESS_ARB:
|
|
*params = simplified_access_mode(bufObj->AccessFlags);
|
|
return;
|
|
case GL_BUFFER_ACCESS_FLAGS:
|
|
if (!ctx->Extensions.ARB_map_buffer_range)
|
|
goto invalid_pname;
|
|
*params = bufObj->AccessFlags;
|
|
return;
|
|
case GL_BUFFER_MAPPED_ARB:
|
|
*params = _mesa_bufferobj_mapped(bufObj);
|
|
return;
|
|
case GL_BUFFER_MAP_OFFSET:
|
|
if (!ctx->Extensions.ARB_map_buffer_range)
|
|
goto invalid_pname;
|
|
*params = bufObj->Offset;
|
|
return;
|
|
case GL_BUFFER_MAP_LENGTH:
|
|
if (!ctx->Extensions.ARB_map_buffer_range)
|
|
goto invalid_pname;
|
|
*params = bufObj->Length;
|
|
return;
|
|
default:
|
|
; /* fall-through */
|
|
}
|
|
|
|
invalid_pname:
|
|
_mesa_error(ctx, GL_INVALID_ENUM, "glGetBufferParameteri64v(pname=%s)",
|
|
_mesa_lookup_enum_by_nr(pname));
|
|
}
|
|
|
|
|
|
void GLAPIENTRY
|
|
_mesa_GetBufferPointervARB(GLenum target, GLenum pname, GLvoid **params)
|
|
{
|
|
GET_CURRENT_CONTEXT(ctx);
|
|
struct gl_buffer_object * bufObj;
|
|
ASSERT_OUTSIDE_BEGIN_END(ctx);
|
|
|
|
if (pname != GL_BUFFER_MAP_POINTER_ARB) {
|
|
_mesa_error(ctx, GL_INVALID_ENUM, "glGetBufferPointervARB(pname)");
|
|
return;
|
|
}
|
|
|
|
bufObj = get_buffer(ctx, "glGetBufferPointervARB", target);
|
|
if (!bufObj)
|
|
return;
|
|
|
|
*params = bufObj->Pointer;
|
|
}
|
|
|
|
/**
|
|
* See GL_ARB_map_buffer_range spec
|
|
*/
|
|
void * GLAPIENTRY
|
|
_mesa_MapBufferRange(GLenum target, GLintptr offset, GLsizeiptr length,
|
|
GLbitfield access)
|
|
{
|
|
GET_CURRENT_CONTEXT(ctx);
|
|
struct gl_buffer_object *bufObj;
|
|
void *map;
|
|
|
|
ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
|
|
|
|
if (!ctx->Extensions.ARB_map_buffer_range) {
|
|
_mesa_error(ctx, GL_INVALID_OPERATION,
|
|
"glMapBufferRange(extension not supported)");
|
|
return NULL;
|
|
}
|
|
|
|
if (offset < 0) {
|
|
_mesa_error(ctx, GL_INVALID_VALUE,
|
|
"glMapBufferRange(offset = %ld)", (long)offset);
|
|
return NULL;
|
|
}
|
|
|
|
if (length < 0) {
|
|
_mesa_error(ctx, GL_INVALID_VALUE,
|
|
"glMapBufferRange(length = %ld)", (long)length);
|
|
return NULL;
|
|
}
|
|
|
|
if (access & ~(GL_MAP_READ_BIT |
|
|
GL_MAP_WRITE_BIT |
|
|
GL_MAP_INVALIDATE_RANGE_BIT |
|
|
GL_MAP_INVALIDATE_BUFFER_BIT |
|
|
GL_MAP_FLUSH_EXPLICIT_BIT |
|
|
GL_MAP_UNSYNCHRONIZED_BIT)) {
|
|
/* generate an error if any undefind bit is set */
|
|
_mesa_error(ctx, GL_INVALID_VALUE, "glMapBufferRange(access)");
|
|
return NULL;
|
|
}
|
|
|
|
if ((access & (GL_MAP_READ_BIT | GL_MAP_WRITE_BIT)) == 0) {
|
|
_mesa_error(ctx, GL_INVALID_OPERATION,
|
|
"glMapBufferRange(access indicates neither read or write)");
|
|
return NULL;
|
|
}
|
|
|
|
if ((access & GL_MAP_READ_BIT) &&
|
|
(access & (GL_MAP_INVALIDATE_RANGE_BIT |
|
|
GL_MAP_INVALIDATE_BUFFER_BIT |
|
|
GL_MAP_UNSYNCHRONIZED_BIT))) {
|
|
_mesa_error(ctx, GL_INVALID_OPERATION,
|
|
"glMapBufferRange(invalid access flags)");
|
|
return NULL;
|
|
}
|
|
|
|
if ((access & GL_MAP_FLUSH_EXPLICIT_BIT) &&
|
|
((access & GL_MAP_WRITE_BIT) == 0)) {
|
|
_mesa_error(ctx, GL_INVALID_OPERATION,
|
|
"glMapBufferRange(invalid access flags)");
|
|
return NULL;
|
|
}
|
|
|
|
bufObj = get_buffer(ctx, "glMapBufferRange", target);
|
|
if (!bufObj)
|
|
return NULL;
|
|
|
|
if (offset + length > bufObj->Size) {
|
|
_mesa_error(ctx, GL_INVALID_VALUE,
|
|
"glMapBufferRange(offset + length > size)");
|
|
return NULL;
|
|
}
|
|
|
|
if (_mesa_bufferobj_mapped(bufObj)) {
|
|
_mesa_error(ctx, GL_INVALID_OPERATION,
|
|
"glMapBufferRange(buffer already mapped)");
|
|
return NULL;
|
|
}
|
|
|
|
if (!bufObj->Size) {
|
|
_mesa_error(ctx, GL_OUT_OF_MEMORY,
|
|
"glMapBufferRange(buffer size = 0)");
|
|
return NULL;
|
|
}
|
|
|
|
/* Mapping zero bytes should return a non-null pointer. */
|
|
if (!length) {
|
|
static long dummy = 0;
|
|
bufObj->Pointer = &dummy;
|
|
bufObj->Length = length;
|
|
bufObj->Offset = offset;
|
|
bufObj->AccessFlags = access;
|
|
return bufObj->Pointer;
|
|
}
|
|
|
|
ASSERT(ctx->Driver.MapBufferRange);
|
|
map = ctx->Driver.MapBufferRange(ctx, offset, length, access, bufObj);
|
|
if (!map) {
|
|
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glMapBufferARB(map failed)");
|
|
}
|
|
else {
|
|
/* The driver callback should have set all these fields.
|
|
* This is important because other modules (like VBO) might call
|
|
* the driver function directly.
|
|
*/
|
|
ASSERT(bufObj->Pointer == map);
|
|
ASSERT(bufObj->Length == length);
|
|
ASSERT(bufObj->Offset == offset);
|
|
ASSERT(bufObj->AccessFlags == access);
|
|
}
|
|
|
|
return map;
|
|
}
|
|
|
|
|
|
/**
|
|
* See GL_ARB_map_buffer_range spec
|
|
*/
|
|
void GLAPIENTRY
|
|
_mesa_FlushMappedBufferRange(GLenum target, GLintptr offset, GLsizeiptr length)
|
|
{
|
|
GET_CURRENT_CONTEXT(ctx);
|
|
struct gl_buffer_object *bufObj;
|
|
ASSERT_OUTSIDE_BEGIN_END(ctx);
|
|
|
|
if (!ctx->Extensions.ARB_map_buffer_range) {
|
|
_mesa_error(ctx, GL_INVALID_OPERATION,
|
|
"glFlushMappedBufferRange(extension not supported)");
|
|
return;
|
|
}
|
|
|
|
if (offset < 0) {
|
|
_mesa_error(ctx, GL_INVALID_VALUE,
|
|
"glFlushMappedBufferRange(offset = %ld)", (long)offset);
|
|
return;
|
|
}
|
|
|
|
if (length < 0) {
|
|
_mesa_error(ctx, GL_INVALID_VALUE,
|
|
"glFlushMappedBufferRange(length = %ld)", (long)length);
|
|
return;
|
|
}
|
|
|
|
bufObj = get_buffer(ctx, "glFlushMappedBufferRange", target);
|
|
if (!bufObj)
|
|
return;
|
|
|
|
if (!_mesa_bufferobj_mapped(bufObj)) {
|
|
/* buffer is not mapped */
|
|
_mesa_error(ctx, GL_INVALID_OPERATION,
|
|
"glFlushMappedBufferRange(buffer is not mapped)");
|
|
return;
|
|
}
|
|
|
|
if ((bufObj->AccessFlags & GL_MAP_FLUSH_EXPLICIT_BIT) == 0) {
|
|
_mesa_error(ctx, GL_INVALID_OPERATION,
|
|
"glFlushMappedBufferRange(GL_MAP_FLUSH_EXPLICIT_BIT not set)");
|
|
return;
|
|
}
|
|
|
|
if (offset + length > bufObj->Length) {
|
|
_mesa_error(ctx, GL_INVALID_VALUE,
|
|
"glFlushMappedBufferRange(offset %ld + length %ld > mapped length %ld)",
|
|
(long)offset, (long)length, (long)bufObj->Length);
|
|
return;
|
|
}
|
|
|
|
ASSERT(bufObj->AccessFlags & GL_MAP_WRITE_BIT);
|
|
|
|
if (ctx->Driver.FlushMappedBufferRange)
|
|
ctx->Driver.FlushMappedBufferRange(ctx, offset, length, bufObj);
|
|
}
|
|
|