text: /*
  Copyright (c) 2007, 2008 Markus Trenkwalder
  
  All rights reserved.
  
  Redistribution and use in source and binary forms, with or without 
  modification, are permitted provided that the following conditions are met:
  
  * Redistributions of source code must retain the above copyright notice, 
    this list of conditions and the following disclaimer.
  
  * Redistributions in binary form must reproduce the above copyright notice,
    this list of conditions and the following disclaimer in the documentation 
    and/or other materials provided with the distribution.
  
  * Neither the name of the library's copyright owner nor the names of its 
    contributors may be used to endorse or promote products derived from this 
    software without specific prior written permission.
  
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
  
  #include "duffsdevice.h"
  
  // LHS and RHS are supposed to be FragmentData structures. OP can be any
  // operation.
  #define FRAGMENTDATA_APPLY(SHADER, LHS, OP, RHS) \
  { \
  	if (SHADER::interpolate_z) \
  		LHS.z OP RHS.z; \
  	DUFFS_DEVICE8( \
  		int i = 0, \
  		LHS.varyings[i] OP RHS.varyings[i]; i++,  \
  		SHADER::varying_count, \
  		/**/) \
  }
  
  #define FRAGMENTDATA_PERSPECTIVE_APPLY(SHADER, LHS, OP, RHS) \
  { \
  	if (SHADER::varying_count) \
  		LHS.oow OP RHS.oow; \
  	FRAGMENTDATA_APPLY(SHADER, LHS.fd, OP, RHS.fd) \
  }
  