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 #include "MHV_Display_Monochrome_Buffered.h" 00028 #include <string.h> 00029 #include <math.h> 00030 00031 #define pixel(pixelRow, pixelCol) _frameBuffer[pixelRow * _colCount + pixelCol] 00032 00039 MHV_Display_Monochrome_Buffered::MHV_Display_Monochrome_Buffered( 00040 uint16_t colCount, uint16_t rowCount, 00041 uint8_t *frameBuffer, MHV_RingBuffer *txBuffers) : 00042 MHV_Display_Monochrome(rowCount, colCount, txBuffers) { 00043 _frameBuffer = frameBuffer; 00044 memset(_frameBuffer, 0, rowCount * colCount); 00045 } 00046 00047 /* Set a pixel 00048 * param: col the column 00049 * param: row the row 00050 * param: value the intensity of the pixel 00051 */ 00052 void MHV_Display_Monochrome_Buffered::setPixel(uint16_t col, uint16_t row, uint8_t value) { 00053 if (row < _rowCount && col < _colCount) { 00054 pixel(row, col) = value; 00055 } 00056 } 00057 00058 /* Get a pixel 00059 * param: col the column 00060 * param: row the row 00061 * return the intensity of the pixel 00062 */ 00063 uint8_t MHV_Display_Monochrome_Buffered::getPixel(uint16_t col, uint16_t row) { 00064 if (row < _rowCount && col < _colCount) { 00065 return pixel(row, col); 00066 } else { 00067 return 0; 00068 } 00069 }