+ GLint bufIndex = _mesa_ffs(destMask[buf]) - 1;
+ /* only one bit should be set in the destMask[buf] field */
+ ASSERT(_mesa_bitcount(destMask[buf]) == 1);
+ if (fb->_ColorDrawBufferIndexes[buf] != bufIndex) {
+ fb->_ColorDrawBufferIndexes[buf] = bufIndex;
+ newState = GL_TRUE;
+ }