MHVLib
20111011
An efficiency oriented runtime library for AVR microcontrollers
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00001 /* Copyright (c) 2011, Make, Hack, Void Inc 00002 * All rights reserved. 00003 * 00004 * Redistribution and use in source and binary forms, with or without 00005 * modification, are permitted provided that the following conditions are met: 00006 * * Redistributions of source code must retain the above copyright 00007 * notice, this list of conditions and the following disclaimer. 00008 * * Redistributions in binary form must reproduce the above copyright 00009 * notice, this list of conditions and the following disclaimer in the 00010 * documentation and/or other materials provided with the distribution. 00011 * * Neither the name of the Make, Hack, Void nor the 00012 * names of its contributors may be used to endorse or promote products 00013 * derived from this software without specific prior written permission. 00014 * 00015 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 00016 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 00017 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 00018 * DISCLAIMED. IN NO EVENT SHALL MAKE, HACK, VOID BE LIABLE FOR ANY 00019 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 00020 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 00021 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 00022 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00023 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 00024 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00025 */ 00026 00027 #ifndef MHV_GAMMACORRECT_H_ 00028 #define MHV_GAMMACORRECT_H_ 00029 00030 #include <inttypes.h> 00031 #include <math.h> 00032 #include <avr/pgmspace.h> 00033 00034 /* Requires mhv_gammaValues to be brought in as: 00035 * extern uint8_t mhv_gammaValues[] PROGMEM; 00036 */ 00037 #define MHV_PRECALCULATED_GAMMA_CORRECT(gammaValue) \ 00038 pgm_read_byte(mhv_gammaValues + gammaValue) 00039 00040 uint8_t mhv_calculatedGammaCorrect(uint8_t value); 00041 uint8_t mhv_precalculatedGammaCorrect(uint8_t value); 00042 00043 #endif /* MHV_GAMMACORRECT_H_ */