#ifdef FEATURE_OES_mapbuffer
-#define DEFAULT_ACCESS GL_WRITE_ONLY;
+#define DEFAULT_ACCESS GL_MAP_WRITE_BIT
#else
-#define DEFAULT_ACCESS GL_READ_WRITE;
+#define DEFAULT_ACCESS (GL_MAP_READ_BIT | GL_MAP_WRITE_BIT)
#endif
}
+/**
+ * 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.
_mesa_error(ctx, GL_INVALID_ENUM, "%s(target)", caller);
return NULL;
}
- if (bufObj->Name == 0) {
+ if (!_mesa_is_bufferobj(bufObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "%s", caller);
return NULL;
}
"%s(size + offset > buffer size)", caller);
return NULL;
}
- if (bufObj->Pointer) {
+ if (_mesa_bufferobj_mapped(bufObj)) {
/* Buffer is currently mapped */
_mesa_error(ctx, GL_INVALID_OPERATION, "%s", caller);
return NULL;
*
* Default callback for the \c dd_function_table::NewBufferObject() hook.
*/
-struct gl_buffer_object *
+static struct gl_buffer_object *
_mesa_new_buffer_object( GLcontext *ctx, GLuint name, GLenum target )
{
struct gl_buffer_object *obj;
*
* Default callback for the \c dd_function_table::DeleteBuffer() hook.
*/
-void
+static void
_mesa_delete_buffer_object( GLcontext *ctx, struct gl_buffer_object *bufObj )
{
(void) ctx;
obj->RefCount = 1;
obj->Name = name;
obj->Usage = GL_STATIC_DRAW_ARB;
- obj->Access = DEFAULT_ACCESS;
+ obj->AccessFlags = DEFAULT_ACCESS;
}
* \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.
*/
-void
+static GLboolean
_mesa_buffer_data( GLcontext *ctx, GLenum target, GLsizeiptrARB size,
const GLvoid * data, GLenum usage,
struct gl_buffer_object * bufObj )
if (data) {
_mesa_memcpy( bufObj->Data, data, size );
}
+
+ return GL_TRUE;
+ }
+ else {
+ return GL_FALSE;
}
}
*
* \sa glBufferSubDataARB, dd_function_table::BufferSubData.
*/
-void
+static void
_mesa_buffer_subdata( GLcontext *ctx, GLenum target, GLintptrARB offset,
GLsizeiptrARB size, const GLvoid * data,
struct gl_buffer_object * bufObj )
*
* \sa glBufferGetSubDataARB, dd_function_table::GetBufferSubData.
*/
-void
+static void
_mesa_buffer_get_subdata( GLcontext *ctx, GLenum target, GLintptrARB offset,
GLsizeiptrARB size, GLvoid * data,
struct gl_buffer_object * bufObj )
*
* \sa glMapBufferARB, dd_function_table::MapBuffer
*/
-void *
+static void *
_mesa_buffer_map( GLcontext *ctx, GLenum target, GLenum access,
struct gl_buffer_object *bufObj )
{
(void) target;
(void) access;
/* Just return a direct pointer to the data */
- if (bufObj->Pointer) {
+ 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().
*
*
* \sa glUnmapBufferARB, dd_function_table::UnmapBuffer
*/
-GLboolean
+static GLboolean
_mesa_buffer_unmap( GLcontext *ctx, GLenum target,
struct gl_buffer_object *bufObj )
{
(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().
*/
-void
+static void
_mesa_copy_buffer_subdata(GLcontext *ctx,
struct gl_buffer_object *src,
struct gl_buffer_object *dst,
GLubyte *srcPtr, *dstPtr;
/* buffer should not already be mapped */
- assert(!src->Pointer);
- assert(!dst->Pointer);
+ assert(!_mesa_bufferobj_mapped(src));
+ assert(!_mesa_bufferobj_mapped(dst));
srcPtr = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_COPY_READ_BUFFER,
GL_READ_ONLY, src);
* 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
GLvoid *start, *end;
const GLubyte *sizeAddr; /* buffer size, cast to a pointer */
- ASSERT(pack->BufferObj->Name != 0);
+ if (!_mesa_is_bufferobj(pack->BufferObj))
+ return GL_TRUE; /* no PBO, OK */
if (pack->BufferObj->Size == 0)
/* no buffer! */
/**
- * If the source of glBitmap data is a PBO, check that we won't read out
- * of buffer bounds, then map the buffer.
- * If not sourcing from a PBO, just return the bitmap pointer.
- * This is a helper function for (some) drivers.
- * Return NULL if error.
- * If non-null return, must call _mesa_unmap_bitmap_pbo() when done.
+ * 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 GLubyte *
-_mesa_map_bitmap_pbo(GLcontext *ctx,
+const GLvoid *
+_mesa_map_pbo_source(GLcontext *ctx,
const struct gl_pixelstore_attrib *unpack,
- const GLubyte *bitmap)
+ const GLvoid *src)
{
const GLubyte *buf;
- if (unpack->BufferObj->Name) {
+ if (_mesa_is_bufferobj(unpack->BufferObj)) {
/* unpack from PBO */
buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
GL_READ_ONLY_ARB,
if (!buf)
return NULL;
- buf = ADD_POINTERS(buf, bitmap);
+ buf = ADD_POINTERS(buf, src);
}
else {
/* unpack from normal memory */
- buf = bitmap;
+ buf = src;
}
return buf;
/**
- * Counterpart to _mesa_map_bitmap_pbo()
- * This is a helper function for (some) drivers.
- */
-void
-_mesa_unmap_bitmap_pbo(GLcontext *ctx,
- const struct gl_pixelstore_attrib *unpack)
-{
- if (unpack->BufferObj->Name) {
- ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
- unpack->BufferObj);
- }
-}
-
-
-/**
- * \sa _mesa_map_bitmap_pbo
+ * 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_drawpix_pbo(GLcontext *ctx,
- const struct gl_pixelstore_attrib *unpack,
- const GLvoid *pixels)
+_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)
{
- const GLvoid *buf;
+ ASSERT(dimensions == 1 || dimensions == 2 || dimensions == 3);
- if (unpack->BufferObj->Name) {
- /* unpack from PBO */
- buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
- GL_READ_ONLY_ARB,
- unpack->BufferObj);
- if (!buf)
- return NULL;
+ if (!_mesa_is_bufferobj(unpack->BufferObj)) {
+ /* non-PBO access: no validation to be done */
+ return ptr;
+ }
- buf = ADD_POINTERS(buf, pixels);
+ 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;
}
- else {
- /* unpack from normal memory */
- buf = pixels;
+
+ 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;
}
- return buf;
+ ptr = _mesa_map_pbo_source(ctx, unpack, ptr);
+ return ptr;
}
/**
- * \sa _mesa_unmap_bitmap_pbo
+ * Counterpart to _mesa_map_pbo_source()
*/
void
-_mesa_unmap_drawpix_pbo(GLcontext *ctx,
- const struct gl_pixelstore_attrib *unpack)
+_mesa_unmap_pbo_source(GLcontext *ctx,
+ const struct gl_pixelstore_attrib *unpack)
{
- if (unpack->BufferObj->Name) {
+ 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);
}
/**
- * If PBO is bound, map the buffer, return dest pointer in mapped buffer.
- * Call _mesa_unmap_readpix_pbo() when finished
- * \return NULL if error
+ * 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_readpix_pbo(GLcontext *ctx,
- const struct gl_pixelstore_attrib *pack,
- GLvoid *dest)
+_mesa_map_pbo_dest(GLcontext *ctx,
+ const struct gl_pixelstore_attrib *pack,
+ GLvoid *dest)
{
void *buf;
- if (pack->BufferObj->Name) {
+ if (_mesa_is_bufferobj(pack->BufferObj)) {
/* pack into PBO */
buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
GL_WRITE_ONLY_ARB,
/**
- * Counterpart to _mesa_map_readpix_pbo()
+ * 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_readpix_pbo(GLcontext *ctx,
- const struct gl_pixelstore_attrib *pack)
+_mesa_unmap_pbo_dest(GLcontext *ctx,
+ const struct gl_pixelstore_attrib *pack)
{
- if (pack->BufferObj->Name) {
+ 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);
}
}
}
+/**
+ * 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 */
ASSERT(bufObj->Name == ids[i]);
- if (bufObj->Pointer) {
+ if (_mesa_bufferobj_mapped(bufObj)) {
/* if mapped, unmap it now */
ctx->Driver.UnmapBuffer(ctx, 0, bufObj);
- bufObj->Access = DEFAULT_ACCESS;
+ bufObj->AccessFlags = DEFAULT_ACCESS;
bufObj->Pointer = NULL;
}
_mesa_error(ctx, GL_INVALID_ENUM, "glBufferDataARB(target)" );
return;
}
- if (bufObj->Name == 0) {
+ if (!_mesa_is_bufferobj(bufObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glBufferDataARB(buffer 0)" );
return;
}
- if (bufObj->Pointer) {
+ if (_mesa_bufferobj_mapped(bufObj)) {
/* Unmap the existing buffer. We'll replace it now. Not an error. */
ctx->Driver.UnmapBuffer(ctx, target, bufObj);
- bufObj->Access = DEFAULT_ACCESS;
- bufObj->Pointer = NULL;
+ bufObj->AccessFlags = DEFAULT_ACCESS;
+ ASSERT(bufObj->Pointer == NULL);
}
FLUSH_VERTICES(ctx, _NEW_BUFFER_OBJECT);
- ASSERT(ctx->Driver.BufferData);
-
bufObj->Written = GL_TRUE;
#ifdef VBO_DEBUG
#ifdef BOUNDS_CHECK
size += 100;
#endif
- /* Give the buffer object to the driver! <data> may be null! */
- ctx->Driver.BufferData( ctx, target, size, data, usage, bufObj );
+
+ ASSERT(ctx->Driver.BufferData);
+ if (!ctx->Driver.BufferData( ctx, target, size, data, usage, bufObj )) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBufferDataARB()");
+ }
}
{
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:
- /* OK */
+ accessFlags = GL_MAP_READ_BIT | GL_MAP_WRITE_BIT;
break;
default:
_mesa_error(ctx, GL_INVALID_ENUM, "glMapBufferARB(access)");
_mesa_error(ctx, GL_INVALID_ENUM, "glMapBufferARB(target)" );
return NULL;
}
- if (bufObj->Name == 0) {
+ if (!_mesa_is_bufferobj(bufObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glMapBufferARB(buffer 0)" );
return NULL;
}
- if (bufObj->Pointer) {
+ if (_mesa_bufferobj_mapped(bufObj)) {
_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)");
+ 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;
}
- bufObj->Access = access;
if (access == GL_WRITE_ONLY_ARB || access == GL_READ_WRITE_ARB)
bufObj->Written = GL_TRUE;
_mesa_error(ctx, GL_INVALID_ENUM, "glUnmapBufferARB(target)" );
return GL_FALSE;
}
- if (bufObj->Name == 0) {
+ if (!_mesa_is_bufferobj(bufObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glUnmapBufferARB" );
return GL_FALSE;
}
- if (!bufObj->Pointer) {
+ if (!_mesa_bufferobj_mapped(bufObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glUnmapBufferARB");
return GL_FALSE;
}
#endif
#ifdef VBO_DEBUG
- if (bufObj->Access == GL_WRITE_ONLY_ARB) {
+ if (bufObj->AccessFlags & GL_MAP_WRITE_BIT) {
GLuint i, unchanged = 0;
GLubyte *b = (GLubyte *) bufObj->Pointer;
GLint pos = -1;
#endif
status = ctx->Driver.UnmapBuffer( ctx, target, bufObj );
- bufObj->Access = DEFAULT_ACCESS;
- bufObj->Pointer = NULL;
+ bufObj->AccessFlags = DEFAULT_ACCESS;
+ ASSERT(bufObj->Pointer == NULL);
+ ASSERT(bufObj->Offset == 0);
+ ASSERT(bufObj->Length == 0);
return status;
}
_mesa_error(ctx, GL_INVALID_ENUM, "GetBufferParameterivARB(target)" );
return;
}
- if (bufObj->Name == 0) {
+ if (!_mesa_is_bufferobj(bufObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "GetBufferParameterivARB" );
return;
}
*params = bufObj->Usage;
break;
case GL_BUFFER_ACCESS_ARB:
- *params = bufObj->Access;
+ *params = simplified_access_mode(bufObj->AccessFlags);
break;
case GL_BUFFER_MAPPED_ARB:
- *params = (bufObj->Pointer != NULL);
+ *params = _mesa_bufferobj_mapped(bufObj);
break;
default:
_mesa_error(ctx, GL_INVALID_ENUM, "glGetBufferParameterivARB(pname)");
_mesa_error(ctx, GL_INVALID_ENUM, "glGetBufferPointervARB(target)" );
return;
}
- if (bufObj->Name == 0) {
+ if (!_mesa_is_bufferobj(bufObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glGetBufferPointervARB" );
return;
}
ASSERT_OUTSIDE_BEGIN_END(ctx);
src = get_buffer(ctx, readTarget);
- if (!src || src->Name == 0) {
+ 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 || dst->Name == 0) {
+ if (!dst || !_mesa_is_bufferobj(dst)) {
_mesa_error(ctx, GL_INVALID_ENUM,
"glCopyBuffserSubData(writeTarget = 0x%x)", writeTarget);
return;
}
- if (src->Pointer) {
+ if (_mesa_bufferobj_mapped(src)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glCopyBuffserSubData(readBuffer is mapped)");
return;
}
- if (dst->Pointer) {
+ if (_mesa_bufferobj_mapped(dst)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glCopyBuffserSubData(writeBuffer is mapped)");
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)", offset);
+ return NULL;
+ }
+
+ if (length < 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glMapBufferRange(length = %ld)", 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)", offset);
+ return;
+ }
+
+ if (length < 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glMapBufferRange(length = %ld)", 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)",
+ offset, length, bufObj->Length);
+ return;
+ }
+
+ ASSERT(bufObj->AccessFlags & GL_MAP_WRITE_BIT);
+
+ if (ctx->Driver.FlushMappedBufferRange)
+ ctx->Driver.FlushMappedBufferRange(ctx, target, offset, length, bufObj);
+}