diff options
Diffstat (limited to 'mesalib/src/mesa/main/bufferobj.c')
| -rw-r--r-- | mesalib/src/mesa/main/bufferobj.c | 4285 |
1 files changed, 2143 insertions, 2142 deletions
diff --git a/mesalib/src/mesa/main/bufferobj.c b/mesalib/src/mesa/main/bufferobj.c index 4797f29b4..a70c75750 100644 --- a/mesalib/src/mesa/main/bufferobj.c +++ b/mesalib/src/mesa/main/bufferobj.c @@ -1,2142 +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 - - -/** - * 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(GLcontext *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: - if (ctx->Extensions.ARB_copy_buffer) { - return &ctx->CopyReadBuffer; - } - break; - case GL_COPY_WRITE_BUFFER: - if (ctx->Extensions.ARB_copy_buffer) { - return &ctx->CopyWriteBuffer; - } - break; -#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(GLcontext *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( 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 (!_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( 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. - * - * Default callback for the \c dd_function_table::DeleteBuffer() hook. - */ -static void -_mesa_delete_buffer_object( GLcontext *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(GLcontext *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( 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) { - 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( 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) { - 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( 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)) { - 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( GLcontext *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( GLcontext *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( GLcontext *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( GLcontext *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(GLcontext *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( GLcontext *ctx ) -{ - _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( GLcontext *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(GLcontext *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) { - /* 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) - 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(GLcontext *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(GLcontext *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(GLcontext *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(GLcontext *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(GLcontext *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(GLcontext *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(GLcontext *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(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->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]); - - 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, 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 (!_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; - } - - 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(GLcontext *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(GLcontext *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(GLcontext *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(GLcontext *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(GLcontext *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(GLcontext *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(GLcontext *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(GLcontext *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(GLcontext *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 */ +/*
+ * 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 */
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