- map_attachment(ctx, fb, fb->_ColorDrawBufferIndexes[buf]);
- find_renderbuffer_colortype(fb->_ColorDrawBuffers[buf]);
+ if (fb->_ColorDrawBufferIndexes[buf] >= 0) {
+ map_attachment(ctx, fb, fb->_ColorDrawBufferIndexes[buf]);
+ find_renderbuffer_colortype(fb->_ColorDrawBuffers[buf]);
+ }