diff options
Diffstat (limited to 'src/mesa/state_tracker/st_cb_bufferobjects.c')
| -rw-r--r-- | src/mesa/state_tracker/st_cb_bufferobjects.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_cb_bufferobjects.c b/src/mesa/state_tracker/st_cb_bufferobjects.c index f5d802055f..340fbd9aba 100644 --- a/src/mesa/state_tracker/st_cb_bufferobjects.c +++ b/src/mesa/state_tracker/st_cb_bufferobjects.c @@ -296,6 +296,43 @@ st_bufferobj_unmap(GLcontext *ctx, GLenum target, struct gl_buffer_object *obj) } +/** + * Called via glCopyBufferSubData(). + */ +static void +st_copy_buffer_subdata(GLcontext *ctx, + struct gl_buffer_object *src, + struct gl_buffer_object *dst, + GLintptr readOffset, GLintptr writeOffset, + GLsizeiptr size) +{ + struct pipe_context *pipe = st_context(ctx)->pipe; + struct st_buffer_object *srcObj = st_buffer_object(src); + struct st_buffer_object *dstObj = st_buffer_object(dst); + ubyte *srcPtr, *dstPtr; + + /* buffer should not already be mapped */ + assert(!src->Pointer); + assert(!dst->Pointer); + + srcPtr = (ubyte *) pipe_buffer_map_range(pipe->screen, + srcObj->buffer, + readOffset, size, + PIPE_BUFFER_USAGE_CPU_READ); + + dstPtr = (ubyte *) pipe_buffer_map_range(pipe->screen, + dstObj->buffer, + writeOffset, size, + PIPE_BUFFER_USAGE_CPU_WRITE); + + if (srcPtr && dstPtr) + _mesa_memcpy(dstPtr + writeOffset, srcPtr + readOffset, size); + + pipe_buffer_unmap(pipe->screen, srcObj->buffer); + pipe_buffer_unmap(pipe->screen, dstObj->buffer); +} + + void st_init_bufferobject_functions(struct dd_function_table *functions) { @@ -308,6 +345,7 @@ st_init_bufferobject_functions(struct dd_function_table *functions) functions->MapBufferRange = st_bufferobj_map_range; functions->FlushMappedBufferRange = st_bufferobj_flush_mapped_range; functions->UnmapBuffer = st_bufferobj_unmap; + functions->CopyBufferSubData = st_copy_buffer_subdata; /* For GL_APPLE_vertex_array_object */ functions->NewArrayObject = _mesa_new_array_object; |