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|
/*
* Mesa 3-D graphics library
* Version: 7.2
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* 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_buffer_object extension.
* \author Brian Paul, Ian Romanick
*/
#include "glheader.h"
#include "hash.h"
#include "imports.h"
#include "image.h"
#include "context.h"
#include "bufferobj.h"
/**
* Get the buffer object bound to the specified target in a GL context.
*
* \param ctx GL context
* \param target Buffer object target to be retrieved. Currently this must
* be either \c GL_ARRAY_BUFFER or \c GL_ELEMENT_ARRAY_BUFFER.
* \return A 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(GLcontext *ctx, GLenum target)
{
struct gl_buffer_object * bufObj = NULL;
switch (target) {
case GL_ARRAY_BUFFER_ARB:
bufObj = ctx->Array.ArrayBufferObj;
break;
case GL_ELEMENT_ARRAY_BUFFER_ARB:
bufObj = ctx->Array.ElementArrayBufferObj;
break;
case GL_PIXEL_PACK_BUFFER_EXT:
bufObj = ctx->Pack.BufferObj;
break;
case GL_PIXEL_UNPACK_BUFFER_EXT:
bufObj = ctx->Unpack.BufferObj;
break;
default:
/* error must be recorded by caller */
return NULL;
}
/* bufObj should point to NullBufferObj or a user-created buffer object */
ASSERT(bufObj);
return bufObj;
}
/**
* 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( GLcontext * 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 (bufObj->Name == 0) {
_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 (bufObj->Pointer) {
/* Buffer is currently mapped */
_mesa_error(ctx, GL_INVALID_OPERATION, "%s", caller);
return NULL;
}
return bufObj;
}
/**
* Allocate and initialize a new buffer object.
*
* This function is intended to be called via
* \c dd_function_table::NewBufferObject.
*/
struct gl_buffer_object *
_mesa_new_buffer_object( GLcontext *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.
*
* This function is intended to be called via
* \c dd_function_table::DeleteBuffer.
*/
void
_mesa_delete_buffer_object( GLcontext *ctx, struct gl_buffer_object *bufObj )
{
(void) ctx;
if (bufObj->Data)
_mesa_free(bufObj->Data);
/* assign strange values here to help w/ debugging */
bufObj->RefCount = -1000;
bufObj->Name = ~0;
_mesa_free(bufObj);
}
/**
* Set ptr to bufObj w/ reference counting.
*/
void
_mesa_reference_buffer_object(GLcontext *ctx,
struct gl_buffer_object **ptr,
struct gl_buffer_object *bufObj)
{
if (*ptr == bufObj)
return;
if (*ptr) {
/* Unreference the old texture */
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 texture */
/*_glthread_LOCK_MUTEX(tex->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(tex->Mutex);*/
}
}
/**
* Initialize a buffer object to default values.
*/
void
_mesa_initialize_buffer_object( struct gl_buffer_object *obj,
GLuint name, GLenum target )
{
(void) target;
_mesa_bzero(obj, sizeof(struct gl_buffer_object));
obj->RefCount = 1;
obj->Name = name;
obj->Usage = GL_STATIC_DRAW_ARB;
obj->Access = GL_READ_WRITE_ARB;
}
/**
* 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 function is intended to be called via
* \c dd_function_table::BufferData. This function need not set GL error
* codes. The input parameters will have been tested before calling.
*
* \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.
*
* \sa glBufferDataARB, dd_function_table::BufferData.
*/
void
_mesa_buffer_data( GLcontext *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) {
_mesa_memcpy( bufObj->Data, data, size );
}
}
}
/**
* 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 function is intended to be called by
* \c dd_function_table::BufferSubData. This function need not set GL error
* codes. The input parameters will have been tested before calling.
*
* \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.
*/
void
_mesa_buffer_subdata( GLcontext *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) {
_mesa_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 function is intended to be called by
* \c dd_function_table::BufferGetSubData. This function need not set GL error
* codes. The input parameters will have been tested before calling.
*
* \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 glBufferGetSubDataARB, dd_function_table::GetBufferSubData.
*/
void
_mesa_buffer_get_subdata( GLcontext *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)) {
_mesa_memcpy( data, (GLubyte *) bufObj->Data + offset, size );
}
}
/**
* Fallback function called via ctx->Driver.MapBuffer().
* Hardware drivers that really implement buffer objects should never use
* this function.
*
* 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
*/
void *
_mesa_buffer_map( GLcontext *ctx, GLenum target, GLenum access,
struct gl_buffer_object *bufObj )
{
(void) ctx;
(void) target;
(void) access;
ASSERT(!bufObj->OnCard);
/* Just return a direct pointer to the data */
if (bufObj->Pointer) {
/* already mapped! */
return NULL;
}
bufObj->Pointer = bufObj->Data;
return bufObj->Pointer;
}
/**
* Fallback function called via ctx->Driver.MapBuffer().
* Hardware drivers that really implement buffer objects should never use
* function.
*
* The input parameters will have been already tested for errors.
*
* \sa glUnmapBufferARB, dd_function_table::UnmapBuffer
*/
GLboolean
_mesa_buffer_unmap( GLcontext *ctx, GLenum target,
struct gl_buffer_object *bufObj )
{
(void) ctx;
(void) target;
ASSERT(!bufObj->OnCard);
/* XXX we might assert here that bufObj->Pointer is non-null */
bufObj->Pointer = NULL;
return GL_TRUE;
}
/**
* Initialize the state associated with buffer objects
*/
void
_mesa_init_buffer_objects( GLcontext *ctx )
{
/* Allocate the default buffer object and set refcount so high that
* it never gets deleted.
* XXX with recent/improved refcounting this may not longer be needed.
*/
ctx->Array.NullBufferObj = _mesa_new_buffer_object(ctx, 0, 0);
if (ctx->Array.NullBufferObj)
ctx->Array.NullBufferObj->RefCount = 1000;
ctx->Array.ArrayBufferObj = ctx->Array.NullBufferObj;
ctx->Array.ElementArrayBufferObj = ctx->Array.NullBufferObj;
}
/**
* 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!
*
* \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 */
ASSERT(pack->BufferObj->Name != 0);
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;
}
/**
* If the source of glBitmap data is a PBO, check that we won't read out
* of buffer bounds, then map the buffer.
* If not sourcing from a PBO, just return the bitmap pointer.
* This is a helper function for (some) drivers.
* Return NULL if error.
* If non-null return, must call _mesa_unmap_bitmap_pbo() when done.
*/
const GLubyte *
_mesa_map_bitmap_pbo(GLcontext *ctx,
const struct gl_pixelstore_attrib *unpack,
const GLubyte *bitmap)
{
const GLubyte *buf;
if (unpack->BufferObj->Name) {
/* 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, bitmap);
}
else {
/* unpack from normal memory */
buf = bitmap;
}
return buf;
}
/**
* Counterpart to _mesa_map_bitmap_pbo()
* This is a helper function for (some) drivers.
*/
void
_mesa_unmap_bitmap_pbo(GLcontext *ctx,
const struct gl_pixelstore_attrib *unpack)
{
if (unpack->BufferObj->Name) {
ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
unpack->BufferObj);
}
}
/**
* \sa _mesa_map_bitmap_pbo
*/
const GLvoid *
_mesa_map_drawpix_pbo(GLcontext *ctx,
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels)
{
const GLvoid *buf;
if (unpack->BufferObj->Name) {
/* 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, pixels);
}
else {
/* unpack from normal memory */
buf = pixels;
}
return buf;
}
/**
* \sa _mesa_unmap_bitmap_pbo
*/
void
_mesa_unmap_drawpix_pbo(GLcontext *ctx,
const struct gl_pixelstore_attrib *unpack)
{
if (unpack->BufferObj->Name) {
ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
unpack->BufferObj);
}
}
/**
* If PBO is bound, map the buffer, return dest pointer in mapped buffer.
* Call _mesa_unmap_readpix_pbo() when finished
* \return NULL if error
*/
void *
_mesa_map_readpix_pbo(GLcontext *ctx,
const struct gl_pixelstore_attrib *pack,
GLvoid *dest)
{
void *buf;
if (pack->BufferObj->Name) {
/* 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;
}
/**
* Counterpart to _mesa_map_readpix_pbo()
*/
void
_mesa_unmap_readpix_pbo(GLcontext *ctx,
const struct gl_pixelstore_attrib *pack)
{
if (pack->BufferObj->Name) {
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(GLcontext *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(GLcontext *ctx,
struct gl_buffer_object **ptr,
struct gl_buffer_object *obj)
{
if (*ptr == obj) {
_mesa_reference_buffer_object(ctx, ptr, ctx->Array.NullBufferObj);
}
}
/**********************************************************************/
/* API Functions */
/**********************************************************************/
void GLAPIENTRY
_mesa_BindBufferARB(GLenum target, GLuint buffer)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_buffer_object *oldBufObj;
struct gl_buffer_object *newBufObj = NULL;
struct gl_buffer_object **bindTarget = NULL;
ASSERT_OUTSIDE_BEGIN_END(ctx);
switch (target) {
case GL_ARRAY_BUFFER_ARB:
bindTarget = &ctx->Array.ArrayBufferObj;
break;
case GL_ELEMENT_ARRAY_BUFFER_ARB:
bindTarget = &ctx->Array.ElementArrayBufferObj;
break;
case GL_PIXEL_PACK_BUFFER_EXT:
bindTarget = &ctx->Pack.BufferObj;
break;
case GL_PIXEL_UNPACK_BUFFER_EXT:
bindTarget = &ctx->Unpack.BufferObj;
break;
default:
_mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferARB(target)");
return;
}
/* Get pointer to old buffer object (to be unbound) */
oldBufObj = get_buffer(ctx, target);
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->Array.NullBufferObj;
}
else {
/* non-default buffer object */
newBufObj = _mesa_lookup_bufferobj(ctx, buffer);
if (!newBufObj) {
/* if this is a new buffer object id, 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 && newBufObj)
ctx->Driver.BindBuffer( ctx, target, newBufObj );
}
/**
* 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) {
/* unbind any vertex pointers bound to this buffer */
GLuint j;
ASSERT(bufObj->Name == ids[i]);
unbind(ctx, &ctx->Array.ArrayObj->Vertex.BufferObj, bufObj);
unbind(ctx, &ctx->Array.ArrayObj->Normal.BufferObj, bufObj);
unbind(ctx, &ctx->Array.ArrayObj->Color.BufferObj, bufObj);
unbind(ctx, &ctx->Array.ArrayObj->SecondaryColor.BufferObj, bufObj);
unbind(ctx, &ctx->Array.ArrayObj->FogCoord.BufferObj, bufObj);
unbind(ctx, &ctx->Array.ArrayObj->Index.BufferObj, bufObj);
unbind(ctx, &ctx->Array.ArrayObj->EdgeFlag.BufferObj, bufObj);
for (j = 0; j < MAX_TEXTURE_UNITS; j++) {
unbind(ctx, &ctx->Array.ArrayObj->TexCoord[j].BufferObj, bufObj);
}
for (j = 0; j < VERT_ATTRIB_MAX; j++) {
unbind(ctx, &ctx->Array.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 );
}
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, bufObj->Name);
_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);
/* Allocate new, empty buffer objects and return identifiers */
for (i = 0; i < n; i++) {
struct gl_buffer_object *bufObj;
GLuint name = first + i;
GLenum target = 0;
bufObj = ctx->Driver.NewBufferObject( ctx, name, target );
if (!bufObj) {
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glGenBuffersARB");
return;
}
_mesa_HashInsert(ctx->Shared->BufferObjects, first + i, bufObj);
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 ? GL_TRUE : GL_FALSE;
}
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 (bufObj->Name == 0) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glBufferDataARB" );
return;
}
if (bufObj->Pointer) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glBufferDataARB(buffer is mapped)" );
return;
}
ASSERT(ctx->Driver.BufferData);
/* Give the buffer object to the driver! <data> may be null! */
ctx->Driver.BufferData( ctx, target, size, data, usage, bufObj );
}
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;
}
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;
ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
switch (access) {
case GL_READ_ONLY_ARB:
case GL_WRITE_ONLY_ARB:
case GL_READ_WRITE_ARB:
/* OK */
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 (bufObj->Name == 0) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glMapBufferARB" );
return NULL;
}
if (bufObj->Pointer) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glMapBufferARB(already mapped)");
return NULL;
}
ASSERT(ctx->Driver.MapBuffer);
bufObj->Pointer = ctx->Driver.MapBuffer( ctx, target, access, bufObj );
if (!bufObj->Pointer) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glMapBufferARB(access)");
}
bufObj->Access = access;
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 (bufObj->Name == 0) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glUnmapBufferARB" );
return GL_FALSE;
}
if (!bufObj->Pointer) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glUnmapBufferARB");
return GL_FALSE;
}
if (ctx->Driver.UnmapBuffer) {
status = ctx->Driver.UnmapBuffer( ctx, target, bufObj );
}
bufObj->Access = GL_READ_WRITE_ARB; /* initial value, OK? */
bufObj->Pointer = NULL;
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, "GetBufferParameterivARB(target)" );
return;
}
if (bufObj->Name == 0) {
_mesa_error(ctx, GL_INVALID_OPERATION, "GetBufferParameterivARB" );
return;
}
switch (pname) {
case GL_BUFFER_SIZE_ARB:
*params = (GLint) bufObj->Size;
break;
case GL_BUFFER_USAGE_ARB:
*params = bufObj->Usage;
break;
case GL_BUFFER_ACCESS_ARB:
*params = bufObj->Access;
break;
case GL_BUFFER_MAPPED_ARB:
*params = (bufObj->Pointer != NULL);
break;
default:
_mesa_error(ctx, GL_INVALID_ENUM, "glGetBufferParameterivARB(pname)");
return;
}
}
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 (bufObj->Name == 0) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glGetBufferPointervARB" );
return;
}
*params = bufObj->Pointer;
}
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