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Regard whitespace Rev 1900 → Rev 1901

/programs/develop/libraries/Mesa/src/mesa/main/bufferobj.c
0,0 → 1,2143
/*
* Mesa 3-D graphics library
* Version: 7.6
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
* Copyright (C) 2009 VMware, Inc. 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
* BRIAN PAUL 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.
*/
 
 
/**
* \file bufferobj.c
* \brief Functions for the GL_ARB_vertex/pixel_buffer_object extensions.
* \author Brian Paul, Ian Romanick
*/
 
 
#include "glheader.h"
#include "enums.h"
#include "hash.h"
#include "imports.h"
#include "image.h"
#include "context.h"
#include "bufferobj.h"
#include "fbobject.h"
#include "texobj.h"
 
 
/* Debug flags */
/*#define VBO_DEBUG*/
/*#define BOUNDS_CHECK*/
 
 
#if FEATURE_OES_mapbuffer
#define DEFAULT_ACCESS GL_MAP_WRITE_BIT
#else
#define DEFAULT_ACCESS (GL_MAP_READ_BIT | GL_MAP_WRITE_BIT)
#endif
 
 
/**
* Used as a placeholder for buffer objects between glGenBuffers() and
* glBindBuffer() so that glIsBuffer() can work correctly.
*/
static struct gl_buffer_object DummyBufferObject;
 
 
/**
* Return pointer to address of a buffer object target.
* \param ctx the GL context
* \param target the buffer object target to be retrieved.
* \return pointer to pointer to the buffer object bound to \c target in the
* specified context or \c NULL if \c target is invalid.
*/
static INLINE struct gl_buffer_object **
get_buffer_target(struct gl_context *ctx, GLenum target)
{
switch (target) {
case GL_ARRAY_BUFFER_ARB:
return &ctx->Array.ArrayBufferObj;
case GL_ELEMENT_ARRAY_BUFFER_ARB:
return &ctx->Array.ElementArrayBufferObj;
case GL_PIXEL_PACK_BUFFER_EXT:
return &ctx->Pack.BufferObj;
case GL_PIXEL_UNPACK_BUFFER_EXT:
return &ctx->Unpack.BufferObj;
case GL_COPY_READ_BUFFER:
return &ctx->CopyReadBuffer;
case GL_COPY_WRITE_BUFFER:
return &ctx->CopyWriteBuffer;
#if FEATURE_EXT_transform_feedback
case GL_TRANSFORM_FEEDBACK_BUFFER:
if (ctx->Extensions.EXT_transform_feedback) {
return &ctx->TransformFeedback.CurrentBuffer;
}
break;
#endif
default:
return NULL;
}
return NULL;
}
 
 
/**
* Get the buffer object bound to the specified target in a GL context.
* \param ctx the GL context
* \param target the buffer object target to be retrieved.
* \return pointer to the buffer object bound to \c target in the
* specified context or \c NULL if \c target is invalid.
*/
static INLINE struct gl_buffer_object *
get_buffer(struct gl_context *ctx, GLenum target)
{
struct gl_buffer_object **bufObj = get_buffer_target(ctx, target);
if (bufObj)
return *bufObj;
return NULL;
}
 
 
/**
* Convert a GLbitfield describing the mapped buffer access flags
* into one of GL_READ_WRITE, GL_READ_ONLY, or GL_WRITE_ONLY.
*/
static GLenum
simplified_access_mode(GLbitfield access)
{
const GLbitfield rwFlags = GL_MAP_READ_BIT | GL_MAP_WRITE_BIT;
if ((access & rwFlags) == rwFlags)
return GL_READ_WRITE;
if ((access & GL_MAP_READ_BIT) == GL_MAP_READ_BIT)
return GL_READ_ONLY;
if ((access & GL_MAP_WRITE_BIT) == GL_MAP_WRITE_BIT)
return GL_WRITE_ONLY;
return GL_READ_WRITE; /* this should never happen, but no big deal */
}
 
 
/**
* Tests the subdata range parameters and sets the GL error code for
* \c glBufferSubDataARB and \c glGetBufferSubDataARB.
*
* \param ctx GL context.
* \param target Buffer object target on which to operate.
* \param offset Offset of the first byte of the subdata range.
* \param size Size, in bytes, of the subdata range.
* \param caller Name of calling function for recording errors.
* \return A pointer to the buffer object bound to \c target in the
* specified context or \c NULL if any of the parameter or state
* conditions for \c glBufferSubDataARB or \c glGetBufferSubDataARB
* are invalid.
*
* \sa glBufferSubDataARB, glGetBufferSubDataARB
*/
static struct gl_buffer_object *
buffer_object_subdata_range_good( struct gl_context * ctx, GLenum target,
GLintptrARB offset, GLsizeiptrARB size,
const char *caller )
{
struct gl_buffer_object *bufObj;
 
if (size < 0) {
_mesa_error(ctx, GL_INVALID_VALUE, "%s(size < 0)", caller);
return NULL;
}
 
if (offset < 0) {
_mesa_error(ctx, GL_INVALID_VALUE, "%s(offset < 0)", caller);
return NULL;
}
 
bufObj = get_buffer(ctx, target);
if (!bufObj) {
_mesa_error(ctx, GL_INVALID_ENUM, "%s(target)", caller);
return NULL;
}
if (!_mesa_is_bufferobj(bufObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "%s", caller);
return NULL;
}
if (offset + size > bufObj->Size) {
_mesa_error(ctx, GL_INVALID_VALUE,
"%s(size + offset > buffer size)", caller);
return NULL;
}
if (_mesa_bufferobj_mapped(bufObj)) {
/* Buffer is currently mapped */
_mesa_error(ctx, GL_INVALID_OPERATION, "%s", caller);
return NULL;
}
 
return bufObj;
}
 
 
/**
* Allocate and initialize a new buffer object.
*
* Default callback for the \c dd_function_table::NewBufferObject() hook.
*/
static struct gl_buffer_object *
_mesa_new_buffer_object( struct gl_context *ctx, GLuint name, GLenum target )
{
struct gl_buffer_object *obj;
 
(void) ctx;
 
obj = MALLOC_STRUCT(gl_buffer_object);
_mesa_initialize_buffer_object(obj, name, target);
return obj;
}
 
 
/**
* Delete a buffer object.
*
* Default callback for the \c dd_function_table::DeleteBuffer() hook.
*/
static void
_mesa_delete_buffer_object( struct gl_context *ctx, struct gl_buffer_object *bufObj )
{
(void) ctx;
 
if (bufObj->Data)
free(bufObj->Data);
 
/* assign strange values here to help w/ debugging */
bufObj->RefCount = -1000;
bufObj->Name = ~0;
 
_glthread_DESTROY_MUTEX(bufObj->Mutex);
free(bufObj);
}
 
 
 
/**
* Set ptr to bufObj w/ reference counting.
*/
void
_mesa_reference_buffer_object(struct gl_context *ctx,
struct gl_buffer_object **ptr,
struct gl_buffer_object *bufObj)
{
if (*ptr == bufObj)
return;
 
if (*ptr) {
/* Unreference the old buffer */
GLboolean deleteFlag = GL_FALSE;
struct gl_buffer_object *oldObj = *ptr;
 
_glthread_LOCK_MUTEX(oldObj->Mutex);
ASSERT(oldObj->RefCount > 0);
oldObj->RefCount--;
#if 0
printf("BufferObj %p %d DECR to %d\n",
(void *) oldObj, oldObj->Name, oldObj->RefCount);
#endif
deleteFlag = (oldObj->RefCount == 0);
_glthread_UNLOCK_MUTEX(oldObj->Mutex);
 
if (deleteFlag) {
 
/* some sanity checking: don't delete a buffer still in use */
#if 0
/* unfortunately, these tests are invalid during context tear-down */
ASSERT(ctx->Array.ArrayBufferObj != bufObj);
ASSERT(ctx->Array.ElementArrayBufferObj != bufObj);
ASSERT(ctx->Array.ArrayObj->Vertex.BufferObj != bufObj);
#endif
 
ASSERT(ctx->Driver.DeleteBuffer);
ctx->Driver.DeleteBuffer(ctx, oldObj);
}
 
*ptr = NULL;
}
ASSERT(!*ptr);
 
if (bufObj) {
/* reference new buffer */
_glthread_LOCK_MUTEX(bufObj->Mutex);
if (bufObj->RefCount == 0) {
/* this buffer's being deleted (look just above) */
/* Not sure this can every really happen. Warn if it does. */
_mesa_problem(NULL, "referencing deleted buffer object");
*ptr = NULL;
}
else {
bufObj->RefCount++;
#if 0
printf("BufferObj %p %d INCR to %d\n",
(void *) bufObj, bufObj->Name, bufObj->RefCount);
#endif
*ptr = bufObj;
}
_glthread_UNLOCK_MUTEX(bufObj->Mutex);
}
}
 
 
/**
* Initialize a buffer object to default values.
*/
void
_mesa_initialize_buffer_object( struct gl_buffer_object *obj,
GLuint name, GLenum target )
{
(void) target;
 
memset(obj, 0, sizeof(struct gl_buffer_object));
_glthread_INIT_MUTEX(obj->Mutex);
obj->RefCount = 1;
obj->Name = name;
obj->Usage = GL_STATIC_DRAW_ARB;
obj->AccessFlags = DEFAULT_ACCESS;
}
 
 
/**
* Allocate space for and store data in a buffer object. Any data that was
* previously stored in the buffer object is lost. If \c data is \c NULL,
* memory will be allocated, but no copy will occur.
*
* This is the default callback for \c dd_function_table::BufferData()
* Note that all GL error checking will have been done already.
*
* \param ctx GL context.
* \param target Buffer object target on which to operate.
* \param size Size, in bytes, of the new data store.
* \param data Pointer to the data to store in the buffer object. This
* pointer may be \c NULL.
* \param usage Hints about how the data will be used.
* \param bufObj Object to be used.
*
* \return GL_TRUE for success, GL_FALSE for failure
* \sa glBufferDataARB, dd_function_table::BufferData.
*/
static GLboolean
_mesa_buffer_data( struct gl_context *ctx, GLenum target, GLsizeiptrARB size,
const GLvoid * data, GLenum usage,
struct gl_buffer_object * bufObj )
{
void * new_data;
 
(void) ctx; (void) target;
 
new_data = _mesa_realloc( bufObj->Data, bufObj->Size, size );
if (new_data) {
bufObj->Data = (GLubyte *) new_data;
bufObj->Size = size;
bufObj->Usage = usage;
 
if (data) {
memcpy( bufObj->Data, data, size );
}
 
return GL_TRUE;
}
else {
return GL_FALSE;
}
}
 
 
/**
* Replace data in a subrange of buffer object. If the data range
* specified by \c size + \c offset extends beyond the end of the buffer or
* if \c data is \c NULL, no copy is performed.
*
* This is the default callback for \c dd_function_table::BufferSubData()
* Note that all GL error checking will have been done already.
*
* \param ctx GL context.
* \param target Buffer object target on which to operate.
* \param offset Offset of the first byte to be modified.
* \param size Size, in bytes, of the data range.
* \param data Pointer to the data to store in the buffer object.
* \param bufObj Object to be used.
*
* \sa glBufferSubDataARB, dd_function_table::BufferSubData.
*/
static void
_mesa_buffer_subdata( struct gl_context *ctx, GLenum target, GLintptrARB offset,
GLsizeiptrARB size, const GLvoid * data,
struct gl_buffer_object * bufObj )
{
(void) ctx; (void) target;
 
/* this should have been caught in _mesa_BufferSubData() */
ASSERT(size + offset <= bufObj->Size);
 
if (bufObj->Data) {
memcpy( (GLubyte *) bufObj->Data + offset, data, size );
}
}
 
 
/**
* Retrieve data from a subrange of buffer object. If the data range
* specified by \c size + \c offset extends beyond the end of the buffer or
* if \c data is \c NULL, no copy is performed.
*
* This is the default callback for \c dd_function_table::GetBufferSubData()
* Note that all GL error checking will have been done already.
*
* \param ctx GL context.
* \param target Buffer object target on which to operate.
* \param offset Offset of the first byte to be fetched.
* \param size Size, in bytes, of the data range.
* \param data Destination for data
* \param bufObj Object to be used.
*
* \sa glBufferGetSubDataARB, dd_function_table::GetBufferSubData.
*/
static void
_mesa_buffer_get_subdata( struct gl_context *ctx, GLenum target, GLintptrARB offset,
GLsizeiptrARB size, GLvoid * data,
struct gl_buffer_object * bufObj )
{
(void) ctx; (void) target;
 
if (bufObj->Data && ((GLsizeiptrARB) (size + offset) <= bufObj->Size)) {
memcpy( data, (GLubyte *) bufObj->Data + offset, size );
}
}
 
 
/**
* Default callback for \c dd_function_tabel::MapBuffer().
*
* The function parameters will have been already tested for errors.
*
* \param ctx GL context.
* \param target Buffer object target on which to operate.
* \param access Information about how the buffer will be accessed.
* \param bufObj Object to be mapped.
* \return A pointer to the object's internal data store that can be accessed
* by the processor
*
* \sa glMapBufferARB, dd_function_table::MapBuffer
*/
static void *
_mesa_buffer_map( struct gl_context *ctx, GLenum target, GLenum access,
struct gl_buffer_object *bufObj )
{
(void) ctx;
(void) target;
(void) access;
/* Just return a direct pointer to the data */
if (_mesa_bufferobj_mapped(bufObj)) {
/* already mapped! */
return NULL;
}
bufObj->Pointer = bufObj->Data;
bufObj->Length = bufObj->Size;
bufObj->Offset = 0;
return bufObj->Pointer;
}
 
 
/**
* Default fallback for \c dd_function_table::MapBufferRange().
* Called via glMapBufferRange().
*/
static void *
_mesa_buffer_map_range( struct gl_context *ctx, GLenum target, GLintptr offset,
GLsizeiptr length, GLbitfield access,
struct gl_buffer_object *bufObj )
{
(void) ctx;
(void) target;
assert(!_mesa_bufferobj_mapped(bufObj));
/* Just return a direct pointer to the data */
bufObj->Pointer = bufObj->Data + offset;
bufObj->Length = length;
bufObj->Offset = offset;
bufObj->AccessFlags = access;
return bufObj->Pointer;
}
 
 
/**
* Default fallback for \c dd_function_table::FlushMappedBufferRange().
* Called via glFlushMappedBufferRange().
*/
static void
_mesa_buffer_flush_mapped_range( struct gl_context *ctx, GLenum target,
GLintptr offset, GLsizeiptr length,
struct gl_buffer_object *obj )
{
(void) ctx;
(void) target;
(void) offset;
(void) length;
(void) obj;
/* no-op */
}
 
 
/**
* Default callback for \c dd_function_table::MapBuffer().
*
* The input parameters will have been already tested for errors.
*
* \sa glUnmapBufferARB, dd_function_table::UnmapBuffer
*/
static GLboolean
_mesa_buffer_unmap( struct gl_context *ctx, GLenum target,
struct gl_buffer_object *bufObj )
{
(void) ctx;
(void) target;
/* XXX we might assert here that bufObj->Pointer is non-null */
bufObj->Pointer = NULL;
bufObj->Length = 0;
bufObj->Offset = 0;
bufObj->AccessFlags = 0x0;
return GL_TRUE;
}
 
 
/**
* Default fallback for \c dd_function_table::CopyBufferSubData().
* Called via glCopyBuffserSubData().
*/
static void
_mesa_copy_buffer_subdata(struct gl_context *ctx,
struct gl_buffer_object *src,
struct gl_buffer_object *dst,
GLintptr readOffset, GLintptr writeOffset,
GLsizeiptr size)
{
GLubyte *srcPtr, *dstPtr;
 
/* buffer should not already be mapped */
assert(!_mesa_bufferobj_mapped(src));
assert(!_mesa_bufferobj_mapped(dst));
 
srcPtr = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_COPY_READ_BUFFER,
GL_READ_ONLY, src);
dstPtr = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_COPY_WRITE_BUFFER,
GL_WRITE_ONLY, dst);
 
if (srcPtr && dstPtr)
memcpy(dstPtr + writeOffset, srcPtr + readOffset, size);
 
ctx->Driver.UnmapBuffer(ctx, GL_COPY_READ_BUFFER, src);
ctx->Driver.UnmapBuffer(ctx, GL_COPY_WRITE_BUFFER, dst);
}
 
 
 
/**
* Initialize the state associated with buffer objects
*/
void
_mesa_init_buffer_objects( struct gl_context *ctx )
{
memset(&DummyBufferObject, 0, sizeof(DummyBufferObject));
DummyBufferObject.RefCount = 1000*1000*1000; /* never delete */
 
_mesa_reference_buffer_object(ctx, &ctx->Array.ArrayBufferObj,
ctx->Shared->NullBufferObj);
_mesa_reference_buffer_object(ctx, &ctx->Array.ElementArrayBufferObj,
ctx->Shared->NullBufferObj);
 
_mesa_reference_buffer_object(ctx, &ctx->CopyReadBuffer,
ctx->Shared->NullBufferObj);
_mesa_reference_buffer_object(ctx, &ctx->CopyWriteBuffer,
ctx->Shared->NullBufferObj);
}
 
 
void
_mesa_free_buffer_objects( struct gl_context *ctx )
{
_mesa_reference_buffer_object(ctx, &ctx->Array.ArrayBufferObj, NULL);
_mesa_reference_buffer_object(ctx, &ctx->Array.ElementArrayBufferObj, NULL);
 
_mesa_reference_buffer_object(ctx, &ctx->CopyReadBuffer, NULL);
_mesa_reference_buffer_object(ctx, &ctx->CopyWriteBuffer, NULL);
}
 
 
/**
* Bind the specified target to buffer for the specified context.
* Called by glBindBuffer() and other functions.
*/
static void
bind_buffer_object(struct gl_context *ctx, GLenum target, GLuint buffer)
{
struct gl_buffer_object *oldBufObj;
struct gl_buffer_object *newBufObj = NULL;
struct gl_buffer_object **bindTarget = NULL;
 
bindTarget = get_buffer_target(ctx, target);
if (!bindTarget) {
_mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferARB(target 0x%x)", target);
return;
}
 
/* Get pointer to old buffer object (to be unbound) */
oldBufObj = *bindTarget;
if (oldBufObj && oldBufObj->Name == buffer)
return; /* rebinding the same buffer object- no change */
 
/*
* Get pointer to new buffer object (newBufObj)
*/
if (buffer == 0) {
/* The spec says there's not a buffer object named 0, but we use
* one internally because it simplifies things.
*/
newBufObj = ctx->Shared->NullBufferObj;
}
else {
/* non-default buffer object */
newBufObj = _mesa_lookup_bufferobj(ctx, buffer);
if (!newBufObj || newBufObj == &DummyBufferObject) {
/* If this is a new buffer object id, or one which was generated but
* never used before, allocate a buffer object now.
*/
ASSERT(ctx->Driver.NewBufferObject);
newBufObj = ctx->Driver.NewBufferObject(ctx, buffer, target);
if (!newBufObj) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindBufferARB");
return;
}
_mesa_HashInsert(ctx->Shared->BufferObjects, buffer, newBufObj);
}
}
/* bind new buffer */
_mesa_reference_buffer_object(ctx, bindTarget, newBufObj);
 
/* 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);
bind_buffer_object( ctx, GL_PIXEL_PACK_BUFFER_ARB, 0);
bind_buffer_object( ctx, GL_PIXEL_UNPACK_BUFFER_ARB, 0);
}
 
 
/**
* When we're about to read pixel data out of a PBO (via glDrawPixels,
* glTexImage, etc) or write data into a PBO (via glReadPixels,
* glGetTexImage, etc) we call this function to check that we're not
* going to read out of bounds.
*
* XXX This would also be a convenient time to check that the PBO isn't
* currently mapped. Whoever calls this function should check for that.
* Remember, we can't use a PBO when it's mapped!
*
* If we're not using a PBO, this is a no-op.
*
* \param width width of image to read/write
* \param height height of image to read/write
* \param depth depth of image to read/write
* \param format format of image to read/write
* \param type datatype of image to read/write
* \param ptr the user-provided pointer/offset
* \return GL_TRUE if the PBO access is OK, GL_FALSE if the access would
* go out of bounds.
*/
GLboolean
_mesa_validate_pbo_access(GLuint dimensions,
const struct gl_pixelstore_attrib *pack,
GLsizei width, GLsizei height, GLsizei depth,
GLenum format, GLenum type, const GLvoid *ptr)
{
GLvoid *start, *end;
const GLubyte *sizeAddr; /* buffer size, cast to a pointer */
 
if (!_mesa_is_bufferobj(pack->BufferObj))
return GL_TRUE; /* no PBO, OK */
 
if (pack->BufferObj->Size == 0)
/* no buffer! */
return GL_FALSE;
 
/* get address of first pixel we'll read */
start = _mesa_image_address(dimensions, pack, ptr, width, height,
format, type, 0, 0, 0);
 
/* get address just past the last pixel we'll read */
end = _mesa_image_address(dimensions, pack, ptr, width, height,
format, type, depth-1, height-1, width);
 
 
sizeAddr = ((const GLubyte *) 0) + pack->BufferObj->Size;
 
if ((const GLubyte *) start > sizeAddr) {
/* This will catch negative values / wrap-around */
return GL_FALSE;
}
if ((const GLubyte *) end > sizeAddr) {
/* Image read goes beyond end of buffer */
return GL_FALSE;
}
 
/* OK! */
return GL_TRUE;
}
 
 
/**
* For commands that read from a PBO (glDrawPixels, glTexImage,
* glPolygonStipple, etc), if we're reading from a PBO, map it read-only
* and return the pointer into the PBO. If we're not reading from a
* PBO, return \p src as-is.
* If non-null return, must call _mesa_unmap_pbo_source() when done.
*
* \return NULL if error, else pointer to start of data
*/
const GLvoid *
_mesa_map_pbo_source(struct gl_context *ctx,
const struct gl_pixelstore_attrib *unpack,
const GLvoid *src)
{
const GLubyte *buf;
 
if (_mesa_is_bufferobj(unpack->BufferObj)) {
/* unpack from PBO */
buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
GL_READ_ONLY_ARB,
unpack->BufferObj);
if (!buf)
return NULL;
 
buf = ADD_POINTERS(buf, src);
}
else {
/* unpack from normal memory */
buf = src;
}
 
return buf;
}
 
 
/**
* Combine PBO-read validation and mapping.
* If any GL errors are detected, they'll be recorded and NULL returned.
* \sa _mesa_validate_pbo_access
* \sa _mesa_map_pbo_source
* A call to this function should have a matching call to
* _mesa_unmap_pbo_source().
*/
const GLvoid *
_mesa_map_validate_pbo_source(struct gl_context *ctx,
GLuint dimensions,
const struct gl_pixelstore_attrib *unpack,
GLsizei width, GLsizei height, GLsizei depth,
GLenum format, GLenum type, const GLvoid *ptr,
const char *where)
{
ASSERT(dimensions == 1 || dimensions == 2 || dimensions == 3);
 
if (!_mesa_is_bufferobj(unpack->BufferObj)) {
/* non-PBO access: no validation to be done */
return ptr;
}
 
if (!_mesa_validate_pbo_access(dimensions, unpack,
width, height, depth, format, type, ptr)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(out of bounds PBO access)", where);
return NULL;
}
 
if (_mesa_bufferobj_mapped(unpack->BufferObj)) {
/* buffer is already mapped - that's an error */
_mesa_error(ctx, GL_INVALID_OPERATION, "%s(PBO is mapped)", where);
return NULL;
}
 
ptr = _mesa_map_pbo_source(ctx, unpack, ptr);
return ptr;
}
 
 
/**
* Counterpart to _mesa_map_pbo_source()
*/
void
_mesa_unmap_pbo_source(struct gl_context *ctx,
const struct gl_pixelstore_attrib *unpack)
{
ASSERT(unpack != &ctx->Pack); /* catch pack/unpack mismatch */
if (_mesa_is_bufferobj(unpack->BufferObj)) {
ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
unpack->BufferObj);
}
}
 
 
/**
* For commands that write to a PBO (glReadPixels, glGetColorTable, etc),
* if we're writing to a PBO, map it write-only and return the pointer
* into the PBO. If we're not writing to a PBO, return \p dst as-is.
* If non-null return, must call _mesa_unmap_pbo_dest() when done.
*
* \return NULL if error, else pointer to start of data
*/
void *
_mesa_map_pbo_dest(struct gl_context *ctx,
const struct gl_pixelstore_attrib *pack,
GLvoid *dest)
{
void *buf;
 
if (_mesa_is_bufferobj(pack->BufferObj)) {
/* pack into PBO */
buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
GL_WRITE_ONLY_ARB,
pack->BufferObj);
if (!buf)
return NULL;
 
buf = ADD_POINTERS(buf, dest);
}
else {
/* pack to normal memory */
buf = dest;
}
 
return buf;
}
 
 
/**
* Combine PBO-write validation and mapping.
* If any GL errors are detected, they'll be recorded and NULL returned.
* \sa _mesa_validate_pbo_access
* \sa _mesa_map_pbo_dest
* A call to this function should have a matching call to
* _mesa_unmap_pbo_dest().
*/
GLvoid *
_mesa_map_validate_pbo_dest(struct gl_context *ctx,
GLuint dimensions,
const struct gl_pixelstore_attrib *unpack,
GLsizei width, GLsizei height, GLsizei depth,
GLenum format, GLenum type, GLvoid *ptr,
const char *where)
{
ASSERT(dimensions == 1 || dimensions == 2 || dimensions == 3);
 
if (!_mesa_is_bufferobj(unpack->BufferObj)) {
/* non-PBO access: no validation to be done */
return ptr;
}
 
if (!_mesa_validate_pbo_access(dimensions, unpack,
width, height, depth, format, type, ptr)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(out of bounds PBO access)", where);
return NULL;
}
 
if (_mesa_bufferobj_mapped(unpack->BufferObj)) {
/* buffer is already mapped - that's an error */
_mesa_error(ctx, GL_INVALID_OPERATION, "%s(PBO is mapped)", where);
return NULL;
}
 
ptr = _mesa_map_pbo_dest(ctx, unpack, ptr);
return ptr;
}
 
 
/**
* Counterpart to _mesa_map_pbo_dest()
*/
void
_mesa_unmap_pbo_dest(struct gl_context *ctx,
const struct gl_pixelstore_attrib *pack)
{
ASSERT(pack != &ctx->Unpack); /* catch pack/unpack mismatch */
if (_mesa_is_bufferobj(pack->BufferObj)) {
ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT, pack->BufferObj);
}
}
 
 
 
/**
* 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->MapBuffer = _mesa_buffer_map;
driver->UnmapBuffer = _mesa_buffer_unmap;
 
/* GL_ARB_map_buffer_range */
driver->MapBufferRange = _mesa_buffer_map_range;
driver->FlushMappedBufferRange = _mesa_buffer_flush_mapped_range;
 
/* GL_ARB_copy_buffer */
driver->CopyBufferSubData = _mesa_copy_buffer_subdata;
}
 
 
 
/**********************************************************************/
/* API Functions */
/**********************************************************************/
 
void GLAPIENTRY
_mesa_BindBufferARB(GLenum target, GLuint buffer)
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
 
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);
 
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) {
struct gl_array_object *arrayObj = ctx->Array.ArrayObj;
GLuint j;
 
ASSERT(bufObj->Name == ids[i] || bufObj == &DummyBufferObject);
 
if (_mesa_bufferobj_mapped(bufObj)) {
/* if mapped, unmap it now */
ctx->Driver.UnmapBuffer(ctx, 0, bufObj);
bufObj->AccessFlags = DEFAULT_ACCESS;
bufObj->Pointer = NULL;
}
 
/* unbind any vertex pointers bound to this buffer */
unbind(ctx, &arrayObj->Vertex.BufferObj, bufObj);
unbind(ctx, &arrayObj->Weight.BufferObj, bufObj);
unbind(ctx, &arrayObj->Normal.BufferObj, bufObj);
unbind(ctx, &arrayObj->Color.BufferObj, bufObj);
unbind(ctx, &arrayObj->SecondaryColor.BufferObj, bufObj);
unbind(ctx, &arrayObj->FogCoord.BufferObj, bufObj);
unbind(ctx, &arrayObj->Index.BufferObj, bufObj);
unbind(ctx, &arrayObj->EdgeFlag.BufferObj, bufObj);
for (j = 0; j < Elements(arrayObj->TexCoord); j++) {
unbind(ctx, &arrayObj->TexCoord[j].BufferObj, bufObj);
}
for (j = 0; j < Elements(arrayObj->VertexAttrib); j++) {
unbind(ctx, &arrayObj->VertexAttrib[j].BufferObj, bufObj);
}
 
if (ctx->Array.ArrayBufferObj == bufObj) {
_mesa_BindBufferARB( GL_ARRAY_BUFFER_ARB, 0 );
}
if (ctx->Array.ElementArrayBufferObj == bufObj) {
_mesa_BindBufferARB( GL_ELEMENT_ARRAY_BUFFER_ARB, 0 );
}
 
/* unbind any pixel pack/unpack pointers bound to this buffer */
if (ctx->Pack.BufferObj == bufObj) {
_mesa_BindBufferARB( GL_PIXEL_PACK_BUFFER_EXT, 0 );
}
if (ctx->Unpack.BufferObj == bufObj) {
_mesa_BindBufferARB( GL_PIXEL_UNPACK_BUFFER_EXT, 0 );
}
 
/* The ID is immediately freed for re-use */
_mesa_HashRemove(ctx->Shared->BufferObjects, ids[i]);
_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 (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 (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, target);
if (!bufObj) {
_mesa_error(ctx, GL_INVALID_ENUM, "glBufferDataARB(target)" );
return;
}
if (!_mesa_is_bufferobj(bufObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glBufferDataARB(buffer 0)" );
return;
}
if (_mesa_bufferobj_mapped(bufObj)) {
/* Unmap the existing buffer. We'll replace it now. Not an error. */
ctx->Driver.UnmapBuffer(ctx, target, bufObj);
bufObj->AccessFlags = DEFAULT_ACCESS;
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, target, 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, target, 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, target);
if (!bufObj) {
_mesa_error(ctx, GL_INVALID_ENUM, "glMapBufferARB(target)" );
return NULL;
}
if (!_mesa_is_bufferobj(bufObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glMapBufferARB(buffer 0)" );
return NULL;
}
if (_mesa_bufferobj_mapped(bufObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glMapBufferARB(already mapped)");
return NULL;
}
 
ASSERT(ctx->Driver.MapBuffer);
map = ctx->Driver.MapBuffer( ctx, target, access, 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, target);
if (!bufObj) {
_mesa_error(ctx, GL_INVALID_ENUM, "glUnmapBufferARB(target)" );
return GL_FALSE;
}
if (!_mesa_is_bufferobj(bufObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glUnmapBufferARB" );
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, target, bufObj );
bufObj->AccessFlags = DEFAULT_ACCESS;
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, target);
if (!bufObj) {
_mesa_error(ctx, GL_INVALID_ENUM, "glGetBufferParameterivARB(target)" );
return;
}
if (!_mesa_is_bufferobj(bufObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glGetBufferParameterivARB" );
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->VersionMajor < 3)
goto invalid_pname;
*params = bufObj->AccessFlags;
return;
case GL_BUFFER_MAP_OFFSET:
if (ctx->VersionMajor < 3)
goto invalid_pname;
*params = (GLint) bufObj->Offset;
return;
case GL_BUFFER_MAP_LENGTH:
if (ctx->VersionMajor < 3)
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, target);
if (!bufObj) {
_mesa_error(ctx, GL_INVALID_ENUM, "glGetBufferParameteri64v(target)" );
return;
}
if (!_mesa_is_bufferobj(bufObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glGetBufferParameteri64v" );
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->VersionMajor < 3)
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->VersionMajor < 3)
goto invalid_pname;
*params = bufObj->Offset;
return;
case GL_BUFFER_MAP_LENGTH:
if (ctx->VersionMajor < 3)
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, target);
if (!bufObj) {
_mesa_error(ctx, GL_INVALID_ENUM, "glGetBufferPointervARB(target)" );
return;
}
if (!_mesa_is_bufferobj(bufObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glGetBufferPointervARB" );
return;
}
 
*params = bufObj->Pointer;
}
 
 
void GLAPIENTRY
_mesa_CopyBufferSubData(GLenum readTarget, GLenum writeTarget,
GLintptr readOffset, GLintptr writeOffset,
GLsizeiptr size)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_buffer_object *src, *dst;
ASSERT_OUTSIDE_BEGIN_END(ctx);
 
src = get_buffer(ctx, readTarget);
if (!src || !_mesa_is_bufferobj(src)) {
_mesa_error(ctx, GL_INVALID_ENUM,
"glCopyBuffserSubData(readTarget = 0x%x)", readTarget);
return;
}
 
dst = get_buffer(ctx, writeTarget);
if (!dst || !_mesa_is_bufferobj(dst)) {
_mesa_error(ctx, GL_INVALID_ENUM,
"glCopyBuffserSubData(writeTarget = 0x%x)", writeTarget);
return;
}
 
if (_mesa_bufferobj_mapped(src)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glCopyBuffserSubData(readBuffer is mapped)");
return;
}
 
if (_mesa_bufferobj_mapped(dst)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glCopyBuffserSubData(writeBuffer is mapped)");
return;
}
 
if (readOffset < 0) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glCopyBuffserSubData(readOffset = %d)", (int) readOffset);
return;
}
 
if (writeOffset < 0) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glCopyBuffserSubData(writeOffset = %d)", (int) writeOffset);
return;
}
 
if (readOffset + size > src->Size) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glCopyBuffserSubData(readOffset + size = %d)",
(int) (readOffset + size));
return;
}
 
if (writeOffset + size > dst->Size) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glCopyBuffserSubData(writeOffset + size = %d)",
(int) (writeOffset + size));
return;
}
 
if (src == dst) {
if (readOffset + size <= writeOffset) {
/* OK */
}
else if (writeOffset + size <= readOffset) {
/* OK */
}
else {
/* overlapping src/dst is illegal */
_mesa_error(ctx, GL_INVALID_VALUE,
"glCopyBuffserSubData(overlapping src/dst)");
return;
}
}
 
ctx->Driver.CopyBufferSubData(ctx, src, dst, readOffset, writeOffset, size);
}
 
 
/**
* 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)) == 0) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glMapBufferRange(access indicates neither read or write)");
return NULL;
}
 
if (access & GL_MAP_READ_BIT) {
if ((access & GL_MAP_INVALIDATE_RANGE_BIT) ||
(access & GL_MAP_INVALIDATE_BUFFER_BIT) ||
(access & 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, target);
if (!bufObj || !_mesa_is_bufferobj(bufObj)) {
_mesa_error(ctx, GL_INVALID_ENUM,
"glMapBufferRange(target = 0x%x)", target);
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;
}
ASSERT(ctx->Driver.MapBufferRange);
map = ctx->Driver.MapBufferRange(ctx, target, 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,
"glMapBufferRange(extension not supported)");
return;
}
 
if (offset < 0) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glMapBufferRange(offset = %ld)", (long)offset);
return;
}
 
if (length < 0) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glMapBufferRange(length = %ld)", (long)length);
return;
}
 
bufObj = get_buffer(ctx, target);
if (!bufObj) {
_mesa_error(ctx, GL_INVALID_ENUM,
"glMapBufferRange(target = 0x%x)", target);
return;
}
 
if (!_mesa_is_bufferobj(bufObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glMapBufferRange(current buffer is 0)");
return;
}
 
if (!_mesa_bufferobj_mapped(bufObj)) {
/* buffer is not mapped */
_mesa_error(ctx, GL_INVALID_OPERATION,
"glMapBufferRange(buffer is not mapped)");
return;
}
 
if ((bufObj->AccessFlags & GL_MAP_FLUSH_EXPLICIT_BIT) == 0) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glMapBufferRange(GL_MAP_FLUSH_EXPLICIT_BIT not set)");
return;
}
 
if (offset + length > bufObj->Length) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glMapBufferRange(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, target, offset, length, bufObj);
}
 
 
#if FEATURE_APPLE_object_purgeable
static GLenum
_mesa_BufferObjectPurgeable(struct gl_context *ctx, GLuint name, GLenum option)
{
struct gl_buffer_object *bufObj;
GLenum retval;
 
bufObj = _mesa_lookup_bufferobj(ctx, name);
if (!bufObj) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glObjectPurgeable(name = 0x%x)", name);
return 0;
}
if (!_mesa_is_bufferobj(bufObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glObjectPurgeable(buffer 0)" );
return 0;
}
 
if (bufObj->Purgeable) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glObjectPurgeable(name = 0x%x) is already purgeable", name);
return GL_VOLATILE_APPLE;
}
 
bufObj->Purgeable = GL_TRUE;
 
retval = GL_VOLATILE_APPLE;
if (ctx->Driver.BufferObjectPurgeable)
retval = ctx->Driver.BufferObjectPurgeable(ctx, bufObj, option);
 
return retval;
}
 
 
static GLenum
_mesa_RenderObjectPurgeable(struct gl_context *ctx, GLuint name, GLenum option)
{
struct gl_renderbuffer *bufObj;
GLenum retval;
 
bufObj = _mesa_lookup_renderbuffer(ctx, name);
if (!bufObj) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glObjectUnpurgeable(name = 0x%x)", name);
return 0;
}
 
if (bufObj->Purgeable) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glObjectPurgeable(name = 0x%x) is already purgeable", name);
return GL_VOLATILE_APPLE;
}
 
bufObj->Purgeable = GL_TRUE;
 
retval = GL_VOLATILE_APPLE;
if (ctx->Driver.RenderObjectPurgeable)
retval = ctx->Driver.RenderObjectPurgeable(ctx, bufObj, option);
 
return retval;
}
 
 
static GLenum
_mesa_TextureObjectPurgeable(struct gl_context *ctx, GLuint name, GLenum option)
{
struct gl_texture_object *bufObj;
GLenum retval;
 
bufObj = _mesa_lookup_texture(ctx, name);
if (!bufObj) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glObjectPurgeable(name = 0x%x)", name);
return 0;
}
 
if (bufObj->Purgeable) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glObjectPurgeable(name = 0x%x) is already purgeable", name);
return GL_VOLATILE_APPLE;
}
 
bufObj->Purgeable = GL_TRUE;
 
retval = GL_VOLATILE_APPLE;
if (ctx->Driver.TextureObjectPurgeable)
retval = ctx->Driver.TextureObjectPurgeable(ctx, bufObj, option);
 
return retval;
}
 
 
GLenum GLAPIENTRY
_mesa_ObjectPurgeableAPPLE(GLenum objectType, GLuint name, GLenum option)
{
GLenum retval;
 
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 
if (name == 0) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glObjectPurgeable(name = 0x%x)", name);
return 0;
}
 
switch (option) {
case GL_VOLATILE_APPLE:
case GL_RELEASED_APPLE:
/* legal */
break;
default:
_mesa_error(ctx, GL_INVALID_ENUM,
"glObjectPurgeable(name = 0x%x) invalid option: %d",
name, option);
return 0;
}
 
switch (objectType) {
case GL_TEXTURE:
retval = _mesa_TextureObjectPurgeable (ctx, name, option);
break;
case GL_RENDERBUFFER_EXT:
retval = _mesa_RenderObjectPurgeable (ctx, name, option);
break;
case GL_BUFFER_OBJECT_APPLE:
retval = _mesa_BufferObjectPurgeable (ctx, name, option);
break;
default:
_mesa_error(ctx, GL_INVALID_ENUM,
"glObjectPurgeable(name = 0x%x) invalid type: %d",
name, objectType);
return 0;
}
 
/* In strict conformance to the spec, we must only return VOLATILE when
* when passed the VOLATILE option. Madness.
*
* XXX First fix the spec, then fix me.
*/
return option == GL_VOLATILE_APPLE ? GL_VOLATILE_APPLE : retval;
}
 
 
static GLenum
_mesa_BufferObjectUnpurgeable(struct gl_context *ctx, GLuint name, GLenum option)
{
struct gl_buffer_object *bufObj;
GLenum retval;
 
bufObj = _mesa_lookup_bufferobj(ctx, name);
if (!bufObj) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glObjectUnpurgeable(name = 0x%x)", name);
return 0;
}
 
if (! bufObj->Purgeable) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glObjectUnpurgeable(name = 0x%x) object is "
" already \"unpurged\"", name);
return 0;
}
 
bufObj->Purgeable = GL_FALSE;
 
retval = option;
if (ctx->Driver.BufferObjectUnpurgeable)
retval = ctx->Driver.BufferObjectUnpurgeable(ctx, bufObj, option);
 
return retval;
}
 
 
static GLenum
_mesa_RenderObjectUnpurgeable(struct gl_context *ctx, GLuint name, GLenum option)
{
struct gl_renderbuffer *bufObj;
GLenum retval;
 
bufObj = _mesa_lookup_renderbuffer(ctx, name);
if (!bufObj) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glObjectUnpurgeable(name = 0x%x)", name);
return 0;
}
 
if (! bufObj->Purgeable) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glObjectUnpurgeable(name = 0x%x) object is "
" already \"unpurged\"", name);
return 0;
}
 
bufObj->Purgeable = GL_FALSE;
 
retval = option;
if (ctx->Driver.RenderObjectUnpurgeable)
retval = ctx->Driver.RenderObjectUnpurgeable(ctx, bufObj, option);
 
return retval;
}
 
 
static GLenum
_mesa_TextureObjectUnpurgeable(struct gl_context *ctx, GLuint name, GLenum option)
{
struct gl_texture_object *bufObj;
GLenum retval;
 
bufObj = _mesa_lookup_texture(ctx, name);
if (!bufObj) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glObjectUnpurgeable(name = 0x%x)", name);
return 0;
}
 
if (! bufObj->Purgeable) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glObjectUnpurgeable(name = 0x%x) object is"
" already \"unpurged\"", name);
return 0;
}
 
bufObj->Purgeable = GL_FALSE;
 
retval = option;
if (ctx->Driver.TextureObjectUnpurgeable)
retval = ctx->Driver.TextureObjectUnpurgeable(ctx, bufObj, option);
 
return retval;
}
 
 
GLenum GLAPIENTRY
_mesa_ObjectUnpurgeableAPPLE(GLenum objectType, GLuint name, GLenum option)
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 
if (name == 0) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glObjectUnpurgeable(name = 0x%x)", name);
return 0;
}
 
switch (option) {
case GL_RETAINED_APPLE:
case GL_UNDEFINED_APPLE:
/* legal */
break;
default:
_mesa_error(ctx, GL_INVALID_ENUM,
"glObjectUnpurgeable(name = 0x%x) invalid option: %d",
name, option);
return 0;
}
 
switch (objectType) {
case GL_BUFFER_OBJECT_APPLE:
return _mesa_BufferObjectUnpurgeable(ctx, name, option);
case GL_TEXTURE:
return _mesa_TextureObjectUnpurgeable(ctx, name, option);
case GL_RENDERBUFFER_EXT:
return _mesa_RenderObjectUnpurgeable(ctx, name, option);
default:
_mesa_error(ctx, GL_INVALID_ENUM,
"glObjectUnpurgeable(name = 0x%x) invalid type: %d",
name, objectType);
return 0;
}
}
 
 
static void
_mesa_GetBufferObjectParameterivAPPLE(struct gl_context *ctx, GLuint name,
GLenum pname, GLint* params)
{
struct gl_buffer_object *bufObj;
 
bufObj = _mesa_lookup_bufferobj(ctx, name);
if (!bufObj) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glGetObjectParameteriv(name = 0x%x) invalid object", name);
return;
}
 
switch (pname) {
case GL_PURGEABLE_APPLE:
*params = bufObj->Purgeable;
break;
default:
_mesa_error(ctx, GL_INVALID_ENUM,
"glGetObjectParameteriv(name = 0x%x) invalid enum: %d",
name, pname);
break;
}
}
 
 
static void
_mesa_GetRenderObjectParameterivAPPLE(struct gl_context *ctx, GLuint name,
GLenum pname, GLint* params)
{
struct gl_renderbuffer *bufObj;
 
bufObj = _mesa_lookup_renderbuffer(ctx, name);
if (!bufObj) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glObjectUnpurgeable(name = 0x%x)", name);
return;
}
 
switch (pname) {
case GL_PURGEABLE_APPLE:
*params = bufObj->Purgeable;
break;
default:
_mesa_error(ctx, GL_INVALID_ENUM,
"glGetObjectParameteriv(name = 0x%x) invalid enum: %d",
name, pname);
break;
}
}
 
 
static void
_mesa_GetTextureObjectParameterivAPPLE(struct gl_context *ctx, GLuint name,
GLenum pname, GLint* params)
{
struct gl_texture_object *bufObj;
 
bufObj = _mesa_lookup_texture(ctx, name);
if (!bufObj) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glObjectUnpurgeable(name = 0x%x)", name);
return;
}
 
switch (pname) {
case GL_PURGEABLE_APPLE:
*params = bufObj->Purgeable;
break;
default:
_mesa_error(ctx, GL_INVALID_ENUM,
"glGetObjectParameteriv(name = 0x%x) invalid enum: %d",
name, pname);
break;
}
}
 
 
void GLAPIENTRY
_mesa_GetObjectParameterivAPPLE(GLenum objectType, GLuint name, GLenum pname,
GLint* params)
{
GET_CURRENT_CONTEXT(ctx);
 
if (name == 0) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glGetObjectParameteriv(name = 0x%x)", name);
return;
}
 
switch (objectType) {
case GL_TEXTURE:
_mesa_GetTextureObjectParameterivAPPLE (ctx, name, pname, params);
break;
case GL_BUFFER_OBJECT_APPLE:
_mesa_GetBufferObjectParameterivAPPLE (ctx, name, pname, params);
break;
case GL_RENDERBUFFER_EXT:
_mesa_GetRenderObjectParameterivAPPLE (ctx, name, pname, params);
break;
default:
_mesa_error(ctx, GL_INVALID_ENUM,
"glGetObjectParameteriv(name = 0x%x) invalid type: %d",
name, objectType);
}
}
 
#endif /* FEATURE_APPLE_object_purgeable */