summaryrefslogtreecommitdiff
path: root/src/mesa/main/bufferobj.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/mesa/main/bufferobj.c')
-rw-r--r--src/mesa/main/bufferobj.c943
1 files changed, 943 insertions, 0 deletions
diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c
new file mode 100644
index 0000000..366ffbb
--- /dev/null
+++ b/src/mesa/main/bufferobj.c
@@ -0,0 +1,943 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 6.5
+ *
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/**
+ * \file bufferobj.c
+ * \brief Functions for the GL_ARB_vertex_buffer_object extension.
+ * \author Brian Paul, Ian Romanick
+ */
+
+
+#include "glheader.h"
+#include "hash.h"
+#include "imports.h"
+#include "image.h"
+#include "context.h"
+#include "bufferobj.h"
+
+
+/**
+ * Get the buffer object bound to the specified target in a GL context.
+ *
+ * \param ctx GL context
+ * \param target Buffer object target to be retrieved. Currently this must
+ * be either \c GL_ARRAY_BUFFER or \c GL_ELEMENT_ARRAY_BUFFER.
+ * \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 \c target is invalid or no
+ * buffer object is bound.
+ */
+static INLINE struct gl_buffer_object *
+buffer_object_get_target(GLcontext *ctx, GLenum target, const char *caller)
+{
+ struct gl_buffer_object * bufObj = NULL;
+
+ switch (target) {
+ case GL_ARRAY_BUFFER_ARB:
+ bufObj = ctx->Array.ArrayBufferObj;
+ break;
+ case GL_ELEMENT_ARRAY_BUFFER_ARB:
+ bufObj = ctx->Array.ElementArrayBufferObj;
+ break;
+ case GL_PIXEL_PACK_BUFFER_EXT:
+ bufObj = ctx->Pack.BufferObj;
+ break;
+ case GL_PIXEL_UNPACK_BUFFER_EXT:
+ bufObj = ctx->Unpack.BufferObj;
+ break;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM, "gl%s(target)", caller);
+ return NULL;
+ }
+
+ if (bufObj->Name == 0)
+ return NULL;
+
+ return bufObj;
+}
+
+
+/**
+ * Tests the subdata range parameters and sets the GL error code for
+ * \c glBufferSubDataARB and \c glGetBufferSubDataARB.
+ *
+ * \param ctx GL context.
+ * \param target Buffer object target on which to operate.
+ * \param offset Offset of the first byte of the subdata range.
+ * \param size Size, in bytes, of the subdata range.
+ * \param caller Name of calling function for recording errors.
+ * \return A pointer to the buffer object bound to \c target in the
+ * specified context or \c NULL if any of the parameter or state
+ * conditions for \c glBufferSubDataARB or \c glGetBufferSubDataARB
+ * are invalid.
+ *
+ * \sa glBufferSubDataARB, glGetBufferSubDataARB
+ */
+static struct gl_buffer_object *
+buffer_object_subdata_range_good( GLcontext * ctx, GLenum target,
+ GLintptrARB offset, GLsizeiptrARB size,
+ const char *caller )
+{
+ struct gl_buffer_object *bufObj;
+
+ if (size < 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE, "%s(size < 0)", caller);
+ return NULL;
+ }
+
+ if (offset < 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE, "%s(offset < 0)", caller);
+ return NULL;
+ }
+
+ bufObj = buffer_object_get_target(ctx, target, caller);
+ if (!bufObj || bufObj->Name == 0) {
+ return NULL;
+ }
+
+ if ((GLuint) (offset + size) > bufObj->Size) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "%s(size + offset > buffer size)", caller);
+ return NULL;
+ }
+
+ if (bufObj->Pointer) {
+ /* Buffer is currently mapped */
+ _mesa_error(ctx, GL_INVALID_OPERATION, "%s", caller);
+ return NULL;
+ }
+
+ return bufObj;
+}
+
+
+/**
+ * Allocate and initialize a new buffer object.
+ *
+ * This function is intended to be called via
+ * \c dd_function_table::NewBufferObject.
+ */
+struct gl_buffer_object *
+_mesa_new_buffer_object( GLcontext *ctx, GLuint name, GLenum target )
+{
+ struct gl_buffer_object *obj;
+
+ (void) ctx;
+
+ obj = MALLOC_STRUCT(gl_buffer_object);
+ _mesa_initialize_buffer_object(obj, name, target);
+ return obj;
+}
+
+
+/**
+ * Delete a buffer object.
+ *
+ * This function is intended to be called via
+ * \c dd_function_table::DeleteBuffer.
+ */
+void
+_mesa_delete_buffer_object( GLcontext *ctx, struct gl_buffer_object *bufObj )
+{
+ (void) ctx;
+
+ if (bufObj->Data)
+ _mesa_free(bufObj->Data);
+ _mesa_free(bufObj);
+}
+
+
+void
+_mesa_unbind_buffer_object( GLcontext *ctx, struct gl_buffer_object *bufObj )
+{
+ if (bufObj != ctx->Array.NullBufferObj) {
+ bufObj->RefCount--;
+ if (bufObj->RefCount <= 0) {
+ ASSERT(ctx->Array.ArrayBufferObj != bufObj);
+ ASSERT(ctx->Array.ElementArrayBufferObj != bufObj);
+ ASSERT(ctx->Array.ArrayObj->Vertex.BufferObj != bufObj);
+ ASSERT(ctx->Driver.DeleteBuffer);
+ ctx->Driver.DeleteBuffer(ctx, bufObj);
+ }
+ }
+}
+
+
+/**
+ * Initialize a buffer object to default values.
+ */
+void
+_mesa_initialize_buffer_object( struct gl_buffer_object *obj,
+ GLuint name, GLenum target )
+{
+ (void) target;
+
+ _mesa_bzero(obj, sizeof(struct gl_buffer_object));
+ obj->RefCount = 1;
+ obj->Name = name;
+ obj->Usage = GL_STATIC_DRAW_ARB;
+ obj->Access = GL_READ_WRITE_ARB;
+}
+
+
+/**
+ * Add the given buffer object to the buffer object pool.
+ */
+void
+_mesa_save_buffer_object( GLcontext *ctx, struct gl_buffer_object *obj )
+{
+ if (obj->Name > 0) {
+ /* insert into hash table */
+ _mesa_HashInsert(ctx->Shared->BufferObjects, obj->Name, obj);
+ }
+}
+
+
+/**
+ * Remove the given buffer object from the buffer object pool.
+ * Do not deallocate the buffer object though.
+ */
+void
+_mesa_remove_buffer_object( GLcontext *ctx, struct gl_buffer_object *bufObj )
+{
+ if (bufObj->Name > 0) {
+ /* remove from hash table */
+ _mesa_HashRemove(ctx->Shared->BufferObjects, bufObj->Name);
+ }
+}
+
+
+/**
+ * Allocate space for and store data in a buffer object. Any data that was
+ * previously stored in the buffer object is lost. If \c data is \c NULL,
+ * memory will be allocated, but no copy will occur.
+ *
+ * This function is intended to be called via
+ * \c dd_function_table::BufferData. This function need not set GL error
+ * codes. The input parameters will have been tested before calling.
+ *
+ * \param ctx GL context.
+ * \param target Buffer object target on which to operate.
+ * \param size Size, in bytes, of the new data store.
+ * \param data Pointer to the data to store in the buffer object. This
+ * pointer may be \c NULL.
+ * \param usage Hints about how the data will be used.
+ * \param bufObj Object to be used.
+ *
+ * \sa glBufferDataARB, dd_function_table::BufferData.
+ */
+void
+_mesa_buffer_data( GLcontext *ctx, GLenum target, GLsizeiptrARB size,
+ const GLvoid * data, GLenum usage,
+ struct gl_buffer_object * bufObj )
+{
+ void * new_data;
+
+ (void) ctx; (void) target;
+
+ new_data = _mesa_realloc( bufObj->Data, bufObj->Size, size );
+ if (new_data) {
+ bufObj->Data = (GLubyte *) new_data;
+ bufObj->Size = size;
+ bufObj->Usage = usage;
+
+ if (data) {
+ _mesa_memcpy( bufObj->Data, data, size );
+ }
+ }
+}
+
+
+/**
+ * Replace data in a subrange of buffer object. If the data range
+ * specified by \c size + \c offset extends beyond the end of the buffer or
+ * if \c data is \c NULL, no copy is performed.
+ *
+ * This function is intended to be called by
+ * \c dd_function_table::BufferSubData. This function need not set GL error
+ * codes. The input parameters will have been tested before calling.
+ *
+ * \param ctx GL context.
+ * \param target Buffer object target on which to operate.
+ * \param offset Offset of the first byte to be modified.
+ * \param size Size, in bytes, of the data range.
+ * \param data Pointer to the data to store in the buffer object.
+ * \param bufObj Object to be used.
+ *
+ * \sa glBufferSubDataARB, dd_function_table::BufferSubData.
+ */
+void
+_mesa_buffer_subdata( GLcontext *ctx, GLenum target, GLintptrARB offset,
+ GLsizeiptrARB size, const GLvoid * data,
+ struct gl_buffer_object * bufObj )
+{
+ (void) ctx; (void) target;
+
+ if (bufObj->Data && ((GLuint) (size + offset) <= bufObj->Size)) {
+ _mesa_memcpy( (GLubyte *) bufObj->Data + offset, data, size );
+ }
+}
+
+
+/**
+ * Retrieve data from a subrange of buffer object. If the data range
+ * specified by \c size + \c offset extends beyond the end of the buffer or
+ * if \c data is \c NULL, no copy is performed.
+ *
+ * This function is intended to be called by
+ * \c dd_function_table::BufferGetSubData. This function need not set GL error
+ * codes. The input parameters will have been tested before calling.
+ *
+ * \param ctx GL context.
+ * \param target Buffer object target on which to operate.
+ * \param offset Offset of the first byte to be modified.
+ * \param size Size, in bytes, of the data range.
+ * \param data Pointer to the data to store in the buffer object.
+ * \param bufObj Object to be used.
+ *
+ * \sa glBufferGetSubDataARB, dd_function_table::GetBufferSubData.
+ */
+void
+_mesa_buffer_get_subdata( GLcontext *ctx, GLenum target, GLintptrARB offset,
+ GLsizeiptrARB size, GLvoid * data,
+ struct gl_buffer_object * bufObj )
+{
+ (void) ctx; (void) target;
+
+ if (bufObj->Data && ((GLsizeiptrARB) (size + offset) <= bufObj->Size)) {
+ _mesa_memcpy( data, (GLubyte *) bufObj->Data + offset, size );
+ }
+}
+
+
+/**
+ * Fallback function called via ctx->Driver.MapBuffer().
+ * Hardware drivers that really implement buffer objects should never use
+ * function.
+ *
+ * The input parameters will have been already tested for errors.
+ *
+ * \param ctx GL context.
+ * \param target Buffer object target on which to operate.
+ * \param access Information about how the buffer will be accessed.
+ * \param bufObj Object to be mapped.
+ * \return A pointer to the object's internal data store that can be accessed
+ * by the processor
+ *
+ * \sa glMapBufferARB, dd_function_table::MapBuffer
+ */
+void *
+_mesa_buffer_map( GLcontext *ctx, GLenum target, GLenum access,
+ struct gl_buffer_object *bufObj )
+{
+ (void) ctx;
+ (void) target;
+ (void) access;
+ ASSERT(!bufObj->OnCard);
+ /* Just return a direct pointer to the data */
+ if (bufObj->Pointer) {
+ /* already mapped! */
+ return NULL;
+ }
+ bufObj->Pointer = bufObj->Data;
+ return bufObj->Pointer;
+}
+
+
+/**
+ * Fallback function called via ctx->Driver.MapBuffer().
+ * Hardware drivers that really implement buffer objects should never use
+ * function.
+ *
+ * The input parameters will have been already tested for errors.
+ *
+ * \sa glUnmapBufferARB, dd_function_table::UnmapBuffer
+ */
+GLboolean
+_mesa_buffer_unmap( GLcontext *ctx, GLenum target,
+ struct gl_buffer_object *bufObj )
+{
+ (void) ctx;
+ (void) target;
+ ASSERT(!bufObj->OnCard);
+ /* XXX we might assert here that bufObj->Pointer is non-null */
+ bufObj->Pointer = NULL;
+ return GL_TRUE;
+}
+
+
+/**
+ * Initialize the state associated with buffer objects
+ */
+void
+_mesa_init_buffer_objects( GLcontext *ctx )
+{
+ /* Allocate the default buffer object and set refcount so high that
+ * it never gets deleted.
+ */
+ ctx->Array.NullBufferObj = _mesa_new_buffer_object(ctx, 0, 0);
+ if (ctx->Array.NullBufferObj)
+ ctx->Array.NullBufferObj->RefCount = 1000;
+
+ ctx->Array.ArrayBufferObj = ctx->Array.NullBufferObj;
+ ctx->Array.ElementArrayBufferObj = ctx->Array.NullBufferObj;
+}
+
+
+/**
+ * When we're about to read pixel data out of a PBO (via glDrawPixels,
+ * glTexImage, etc) or write data into a PBO (via glReadPixels,
+ * glGetTexImage, etc) we call this function to check that we're not
+ * going to read out of bounds.
+ *
+ * XXX This would also be a convenient time to check that the PBO isn't
+ * currently mapped. Whoever calls this function should check for that.
+ * Remember, we can't use a PBO when it's mapped!
+ *
+ * \param width width of image to read/write
+ * \param height height of image to read/write
+ * \param depth depth of image to read/write
+ * \param format format of image to read/write
+ * \param type datatype of image to read/write
+ * \param ptr the user-provided pointer/offset
+ * \return GL_TRUE if the PBO access is OK, GL_FALSE if the access would
+ * go out of bounds.
+ */
+GLboolean
+_mesa_validate_pbo_access(GLuint dimensions,
+ const struct gl_pixelstore_attrib *pack,
+ GLsizei width, GLsizei height, GLsizei depth,
+ GLenum format, GLenum type, const GLvoid *ptr)
+{
+ GLvoid *start, *end;
+ const GLubyte *sizeAddr; /* buffer size, cast to a pointer */
+
+ ASSERT(pack->BufferObj->Name != 0);
+
+ if (pack->BufferObj->Size == 0)
+ /* no buffer! */
+ return GL_FALSE;
+
+ /* get address of first pixel we'll read */
+ start = _mesa_image_address(dimensions, pack, ptr, width, height,
+ format, type, 0, 0, 0);
+
+ /* get address just past the last pixel we'll read */
+ end = _mesa_image_address(dimensions, pack, ptr, width, height,
+ format, type, depth-1, height-1, width);
+
+
+ sizeAddr = ((const GLubyte *) 0) + pack->BufferObj->Size;
+
+ if ((const GLubyte *) start > sizeAddr) {
+ /* This will catch negative values / wrap-around */
+ return GL_FALSE;
+ }
+ if ((const GLubyte *) end > sizeAddr) {
+ /* Image read goes beyond end of buffer */
+ return GL_FALSE;
+ }
+
+ /* OK! */
+ return GL_TRUE;
+}
+
+
+/**
+ * Return the gl_buffer_object for the given ID.
+ * Always return NULL for ID 0.
+ */
+static INLINE struct gl_buffer_object *
+lookup_bufferobj(GLcontext *ctx, GLuint buffer)
+{
+ if (buffer == 0)
+ return NULL;
+ else
+ return (struct gl_buffer_object *)
+ _mesa_HashLookup(ctx->Shared->BufferObjects, buffer);
+}
+
+
+
+/**********************************************************************/
+/* API Functions */
+/**********************************************************************/
+
+void GLAPIENTRY
+_mesa_BindBufferARB(GLenum target, GLuint buffer)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ struct gl_buffer_object *oldBufObj;
+ struct gl_buffer_object *newBufObj = NULL;
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ oldBufObj = buffer_object_get_target( ctx, target, "BindBufferARB" );
+ if (oldBufObj && oldBufObj->Name == buffer)
+ return; /* rebinding the same buffer object- no change */
+
+ /*
+ * Get pointer to new buffer object (newBufObj)
+ */
+ if (buffer == 0) {
+ /* The spec says there's not a buffer object named 0, but we use
+ * one internally because it simplifies things.
+ */
+ newBufObj = ctx->Array.NullBufferObj;
+ }
+ else {
+ /* non-default buffer object */
+ newBufObj = 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_save_buffer_object(ctx, newBufObj);
+ }
+ newBufObj->RefCount++;
+ }
+
+ switch (target) {
+ case GL_ARRAY_BUFFER_ARB:
+ ctx->Array.ArrayBufferObj = newBufObj;
+ break;
+ case GL_ELEMENT_ARRAY_BUFFER_ARB:
+ ctx->Array.ElementArrayBufferObj = newBufObj;
+ break;
+ case GL_PIXEL_PACK_BUFFER_EXT:
+ ctx->Pack.BufferObj = newBufObj;
+ break;
+ case GL_PIXEL_UNPACK_BUFFER_EXT:
+ ctx->Unpack.BufferObj = newBufObj;
+ break;
+ default:
+ _mesa_problem(ctx, "Bad target in _mesa_BindBufferARB");
+ return;
+ }
+
+ /* Pass BindBuffer call to device driver */
+ if (ctx->Driver.BindBuffer && newBufObj)
+ ctx->Driver.BindBuffer( ctx, target, newBufObj );
+
+ if (oldBufObj) {
+ oldBufObj->RefCount--;
+ assert(oldBufObj->RefCount >= 0);
+ if (oldBufObj->RefCount == 0) {
+ assert(oldBufObj->Name != 0);
+ ASSERT(ctx->Driver.DeleteBuffer);
+ ctx->Driver.DeleteBuffer( ctx, oldBufObj );
+ }
+ }
+}
+
+
+/**
+ * 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 = lookup_bufferobj(ctx, ids[i]);
+ if (bufObj) {
+ /* unbind any vertex pointers bound to this buffer */
+ GLuint j;
+
+ ASSERT(bufObj->Name == ids[i]);
+
+ if (ctx->Array.ArrayObj->Vertex.BufferObj == bufObj) {
+ bufObj->RefCount--;
+ ctx->Array.ArrayObj->Vertex.BufferObj = ctx->Array.NullBufferObj;
+ ctx->Array.NullBufferObj->RefCount++;
+ }
+ if (ctx->Array.ArrayObj->Normal.BufferObj == bufObj) {
+ bufObj->RefCount--;
+ ctx->Array.ArrayObj->Normal.BufferObj = ctx->Array.NullBufferObj;
+ ctx->Array.NullBufferObj->RefCount++;
+ }
+ if (ctx->Array.ArrayObj->Color.BufferObj == bufObj) {
+ bufObj->RefCount--;
+ ctx->Array.ArrayObj->Color.BufferObj = ctx->Array.NullBufferObj;
+ ctx->Array.NullBufferObj->RefCount++;
+ }
+ if (ctx->Array.ArrayObj->SecondaryColor.BufferObj == bufObj) {
+ bufObj->RefCount--;
+ ctx->Array.ArrayObj->SecondaryColor.BufferObj = ctx->Array.NullBufferObj;
+ ctx->Array.NullBufferObj->RefCount++;
+ }
+ if (ctx->Array.ArrayObj->FogCoord.BufferObj == bufObj) {
+ bufObj->RefCount--;
+ ctx->Array.ArrayObj->FogCoord.BufferObj = ctx->Array.NullBufferObj;
+ ctx->Array.NullBufferObj->RefCount++;
+ }
+ if (ctx->Array.ArrayObj->Index.BufferObj == bufObj) {
+ bufObj->RefCount--;
+ ctx->Array.ArrayObj->Index.BufferObj = ctx->Array.NullBufferObj;
+ ctx->Array.NullBufferObj->RefCount++;
+ }
+ if (ctx->Array.ArrayObj->EdgeFlag.BufferObj == bufObj) {
+ bufObj->RefCount--;
+ ctx->Array.ArrayObj->EdgeFlag.BufferObj = ctx->Array.NullBufferObj;
+ ctx->Array.NullBufferObj->RefCount++;
+ }
+ for (j = 0; j < MAX_TEXTURE_UNITS; j++) {
+ if (ctx->Array.ArrayObj->TexCoord[j].BufferObj == bufObj) {
+ bufObj->RefCount--;
+ ctx->Array.ArrayObj->TexCoord[j].BufferObj = ctx->Array.NullBufferObj;
+ ctx->Array.NullBufferObj->RefCount++;
+ }
+ }
+ for (j = 0; j < VERT_ATTRIB_MAX; j++) {
+ if (ctx->Array.ArrayObj->VertexAttrib[j].BufferObj == bufObj) {
+ bufObj->RefCount--;
+ ctx->Array.ArrayObj->VertexAttrib[j].BufferObj = ctx->Array.NullBufferObj;
+ ctx->Array.NullBufferObj->RefCount++;
+ }
+ }
+
+ if (ctx->Array.ArrayBufferObj == bufObj) {
+ _mesa_BindBufferARB( GL_ARRAY_BUFFER_ARB, 0 );
+ }
+ if (ctx->Array.ElementArrayBufferObj == bufObj) {
+ _mesa_BindBufferARB( GL_ELEMENT_ARRAY_BUFFER_ARB, 0 );
+ }
+
+ if (ctx->Pack.BufferObj == bufObj) {
+ _mesa_BindBufferARB( GL_PIXEL_PACK_BUFFER_EXT, 0 );
+ }
+ if (ctx->Unpack.BufferObj == bufObj) {
+ _mesa_BindBufferARB( GL_PIXEL_UNPACK_BUFFER_EXT, 0 );
+ }
+
+ /* The ID is immediately freed for re-use */
+ _mesa_remove_buffer_object(ctx, bufObj);
+ _mesa_unbind_buffer_object(ctx, bufObj);
+ }
+ }
+
+ _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_save_buffer_object(ctx, 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 = 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 = buffer_object_get_target( ctx, target, "BufferDataARB" );
+ if (!bufObj || bufObj->Name ==0) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glBufferDataARB" );
+ return;
+ }
+
+ if (bufObj->Pointer) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glBufferDataARB(buffer is mapped)" );
+ return;
+ }
+
+ ASSERT(ctx->Driver.BufferData);
+
+ /* Give the buffer object to the driver! <data> may be null! */
+ ctx->Driver.BufferData( ctx, target, size, data, usage, bufObj );
+}
+
+
+void GLAPIENTRY
+_mesa_BufferSubDataARB(GLenum target, GLintptrARB offset,
+ GLsizeiptrARB size, const GLvoid * data)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ struct gl_buffer_object *bufObj;
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ bufObj = buffer_object_subdata_range_good( ctx, target, offset, size,
+ "BufferSubDataARB" );
+ if (!bufObj) {
+ /* error already recorded */
+ return;
+ }
+
+ ASSERT(ctx->Driver.BufferSubData);
+ ctx->Driver.BufferSubData( ctx, target, offset, size, data, bufObj );
+}
+
+
+void GLAPIENTRY
+_mesa_GetBufferSubDataARB(GLenum target, GLintptrARB offset,
+ GLsizeiptrARB size, void * data)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ struct gl_buffer_object *bufObj;
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ bufObj = buffer_object_subdata_range_good( ctx, target, offset, size,
+ "GetBufferSubDataARB" );
+ if (!bufObj) {
+ /* error already recorded */
+ return;
+ }
+
+ ASSERT(ctx->Driver.GetBufferSubData);
+ ctx->Driver.GetBufferSubData( ctx, target, offset, size, data, bufObj );
+}
+
+
+void * GLAPIENTRY
+_mesa_MapBufferARB(GLenum target, GLenum access)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ struct gl_buffer_object * bufObj;
+ ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
+
+ switch (access) {
+ case GL_READ_ONLY_ARB:
+ case GL_WRITE_ONLY_ARB:
+ case GL_READ_WRITE_ARB:
+ /* OK */
+ break;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM, "glMapBufferARB(access)");
+ return NULL;
+ }
+
+ bufObj = buffer_object_get_target( ctx, target, "MapBufferARB" );
+ if (!bufObj || bufObj->Name == 0) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glMapBufferARB" );
+ return NULL;
+ }
+
+ if (bufObj->Pointer) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glMapBufferARB(already mapped)");
+ return NULL;
+ }
+
+ ASSERT(ctx->Driver.MapBuffer);
+ bufObj->Pointer = ctx->Driver.MapBuffer( ctx, target, access, bufObj );
+ if (!bufObj->Pointer) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glMapBufferARB(access)");
+ }
+
+ bufObj->Access = access;
+
+ return bufObj->Pointer;
+}
+
+
+GLboolean GLAPIENTRY
+_mesa_UnmapBufferARB(GLenum target)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ struct gl_buffer_object *bufObj;
+ GLboolean status = GL_TRUE;
+ ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
+
+ bufObj = buffer_object_get_target( ctx, target, "UnmapBufferARB" );
+ if (!bufObj || bufObj->Name == 0) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glUnmapBufferARB" );
+ return GL_FALSE;
+ }
+
+ if (!bufObj->Pointer) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glUnmapBufferARB");
+ return GL_FALSE;
+ }
+
+ if (ctx->Driver.UnmapBuffer) {
+ status = ctx->Driver.UnmapBuffer( ctx, target, bufObj );
+ }
+
+ bufObj->Access = GL_READ_WRITE_ARB; /* initial value, OK? */
+ bufObj->Pointer = NULL;
+
+ return status;
+}
+
+
+void GLAPIENTRY
+_mesa_GetBufferParameterivARB(GLenum target, GLenum pname, GLint *params)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ struct gl_buffer_object *bufObj;
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ bufObj = buffer_object_get_target( ctx, target, "GetBufferParameterivARB" );
+ if (!bufObj || bufObj->Name == 0) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "GetBufferParameterivARB" );
+ return;
+ }
+
+ switch (pname) {
+ case GL_BUFFER_SIZE_ARB:
+ *params = (GLint) bufObj->Size;
+ break;
+ case GL_BUFFER_USAGE_ARB:
+ *params = bufObj->Usage;
+ break;
+ case GL_BUFFER_ACCESS_ARB:
+ *params = bufObj->Access;
+ break;
+ case GL_BUFFER_MAPPED_ARB:
+ *params = (bufObj->Pointer != NULL);
+ break;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetBufferParameterivARB(pname)");
+ return;
+ }
+}
+
+
+void GLAPIENTRY
+_mesa_GetBufferPointervARB(GLenum target, GLenum pname, GLvoid **params)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ struct gl_buffer_object * bufObj;
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ if (pname != GL_BUFFER_MAP_POINTER_ARB) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetBufferPointervARB(pname)");
+ return;
+ }
+
+ bufObj = buffer_object_get_target( ctx, target, "GetBufferPointervARB" );
+ if (!bufObj || bufObj->Name == 0) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGetBufferPointervARB" );
+ return;
+ }
+
+ *params = bufObj->Pointer;
+}