* rebase it into a temporary.
*/
if ((get_size(index_buffer->type) - 1) & offset) {
- GLubyte *map = ctx->Driver.MapBuffer(ctx,
- GL_ELEMENT_ARRAY_BUFFER_ARB,
- GL_DYNAMIC_DRAW_ARB,
- bufferobj);
- map += offset;
+ GLubyte *map = ctx->Driver.MapBufferRange(ctx,
+ offset,
+ ib_size,
+ GL_MAP_WRITE_BIT,
+ bufferobj);
intel_upload_data(&brw->intel, map, ib_size, ib_type_size,
&bo, &offset);
brw->ib.start_vertex_offset = offset / ib_type_size;
- ctx->Driver.UnmapBuffer(ctx, GL_ELEMENT_ARRAY_BUFFER_ARB, bufferobj);
+ ctx->Driver.UnmapBuffer(ctx, bufferobj);
} else {
/* Use CMD_3D_PRIM's start_vertex_offset to avoid re-uploading
* the index buffer state when we're just moving the start index