tabletranstemplate.cpp
资源名称:vnc3326s.zip [点击查看]
上传用户:sbftbdw
上传日期:2007-01-03
资源大小:379k
文件大小:3k
源码类别:
远程控制编程
开发平台:
Visual C++
- /*
- * tabletranstemplate.c - template for translation using lookup tables.
- *
- * This file shouldn't be compiled. It is included multiple times by
- * translate.c, each time with different definitions of the macros IN and OUT.
- *
- * For each pair of values IN and OUT, this file defines two functions for
- * translating a given rectangle of pixel data. One uses a single lookup
- * table, and the other uses three separate lookup tables for the red, green
- * and blue values.
- *
- * I know this code isn't nice to read because of all the macros, but
- * efficiency is important here.
- */
- #if !defined(IN) || !defined(OUT)
- #error "This file shouldn't be compiled."
- #error "It is included as part of translate.c"
- #endif
- #define IN_T CONCAT2E(CARD,IN)
- #define OUT_T CONCAT2E(CARD,OUT)
- #define rfbTranslateWithSingleTableINtoOUT
- CONCAT4E(rfbTranslateWithSingleTable,IN,to,OUT)
- #define rfbTranslateWithRGBTablesINtoOUT
- CONCAT4E(rfbTranslateWithRGBTables,IN,to,OUT)
- /*
- * rfbTranslateWithSingleTableINtoOUT translates a rectangle of pixel data
- * using a single lookup table.
- */
- static void
- rfbTranslateWithSingleTableINtoOUT (char *table, rfbPixelFormat *in,
- rfbPixelFormat *out,
- char *iptr, char *optr,
- int bytesBetweenInputLines,
- int width, int height)
- {
- IN_T *ip = (IN_T *)iptr;
- OUT_T *op = (OUT_T *)optr;
- int ipextra = bytesBetweenInputLines / sizeof(IN_T) - width;
- OUT_T *opLineEnd;
- OUT_T *t = (OUT_T *)table;
- while (height > 0) {
- opLineEnd = op + width;
- while (op < opLineEnd) {
- *(op++) = t[*(ip++)];
- }
- ip += ipextra;
- height--;
- }
- }
- /*
- * rfbTranslateWithRGBTablesINtoOUT translates a rectangle of pixel data
- * using three separate lookup tables for the red, green and blue values.
- */
- static void
- rfbTranslateWithRGBTablesINtoOUT (char *table, rfbPixelFormat *in,
- rfbPixelFormat *out,
- char *iptr, char *optr,
- int bytesBetweenInputLines,
- int width, int height)
- {
- IN_T *ip = (IN_T *)iptr;
- OUT_T *op = (OUT_T *)optr;
- int ipextra = bytesBetweenInputLines / sizeof(IN_T) - width;
- OUT_T *opLineEnd;
- OUT_T *redTable = (OUT_T *)table;
- OUT_T *greenTable = redTable + in->redMax + 1;
- OUT_T *blueTable = greenTable + in->greenMax + 1;
- while (height > 0) {
- opLineEnd = op + width;
- while (op < opLineEnd) {
- *(op++) = (redTable[(*ip >> in->redShift) & in->redMax] |
- greenTable[(*ip >> in->greenShift) & in->greenMax] |
- blueTable[(*ip >> in->blueShift) & in->blueMax]);
- ip++;
- }
- ip += ipextra;
- height--;
- }
- }
- #undef IN_T
- #undef OUT_T
- #undef rfbTranslateWithSingleTableINtoOUT
- #undef rfbTranslateWithRGBTablesINtoOUT