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author | Constantin Kaplinsky <const@tightvnc.com> | 2006-05-25 05:01:55 +0000 |
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committer | Constantin Kaplinsky <const@tightvnc.com> | 2006-05-25 05:01:55 +0000 |
commit | a2adc8d4cfdf7336ce9192414c5e775224742a97 (patch) | |
tree | 0fc9f229bd40a2de342d91338798033da8ebd7bc /common/rfb/transTempl.h | |
parent | 4fc2026b9595e9425f50616d18781995aebe495b (diff) | |
download | tigervnc-a2adc8d4cfdf7336ce9192414c5e775224742a97.tar.gz tigervnc-a2adc8d4cfdf7336ce9192414c5e775224742a97.zip |
Migrating to new directory structure adopted from the RealVNC's source tree. More changes will follow.
git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@589 3789f03b-4d11-0410-bbf8-ca57d06f2519
Diffstat (limited to 'common/rfb/transTempl.h')
-rw-r--r-- | common/rfb/transTempl.h | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/common/rfb/transTempl.h b/common/rfb/transTempl.h new file mode 100644 index 00000000..09dc7f95 --- /dev/null +++ b/common/rfb/transTempl.h @@ -0,0 +1,151 @@ +/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved. + * + * This is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This software is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this software; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, + * USA. + */ +// +// transTempl.h - templates for translation functions. +// +// This file is #included after having set the following macros: +// BPPIN - 8, 16 or 32 +// BPPOUT - 8, 16 or 32 + +#if !defined(BPPIN) || !defined(BPPOUT) +#error "transTempl.h: BPPIN or BPPOUT not defined" +#endif + +// CONCAT2E concatenates its arguments, expanding them if they are macros + +#ifndef CONCAT2E +#define CONCAT2(a,b) a##b +#define CONCAT2E(a,b) CONCAT2(a,b) +#endif + +#ifndef CONCAT4E +#define CONCAT4(a,b,c,d) a##b##c##d +#define CONCAT4E(a,b,c,d) CONCAT4(a,b,c,d) +#endif + +#define INPIXEL rdr::CONCAT2E(U,BPPIN) +#define OUTPIXEL rdr::CONCAT2E(U,BPPOUT) +#define transSimpleINtoOUT CONCAT4E(transSimple,BPPIN,to,BPPOUT) +#define transRGBINtoOUT CONCAT4E(transRGB,BPPIN,to,BPPOUT) +#define transRGBCubeINtoOUT CONCAT4E(transRGBCube,BPPIN,to,BPPOUT) + +#if (BPPIN <= 16) + +// transSimpleINtoOUT uses a single table. This can be used for any incoming +// and outgoing pixel formats, as long as the incoming pixel format is not too +// large (for 16bpp, the table needs 64K entries). + +void transSimpleINtoOUT (void* table_, + const PixelFormat& inPF, void* inPtr, int inStride, + const PixelFormat& outPF, void* outPtr, int outStride, + int width, int height) +{ + OUTPIXEL* table = (OUTPIXEL*)table_; + INPIXEL* ip = (INPIXEL*)inPtr; + OUTPIXEL* op = (OUTPIXEL*)outPtr; + int inExtra = inStride - width; + int outExtra = outStride - width; + + while (height > 0) { + OUTPIXEL* opEndOfRow = op + width; + while (op < opEndOfRow) + *op++ = table[*ip++]; + ip += inExtra; + op += outExtra; + height--; + } +} + +#endif + +#if (BPPIN >= 16) + +// transRGBINtoOUT uses three tables, one each for red, green and blue +// components and adds the values to produce the result. This can be used +// where a single table would be too large (e.g. 32bpp). It only works for a +// trueColour incoming pixel format. Usually the outgoing pixel format is +// trueColour, but we add rather than ORing the three values so that it is also +// possible to generate an index into a colour cube. I believe that in most +// cases adding is just as fast as ORing - if not then we should split this +// into two different functions for efficiency. + +void transRGBINtoOUT (void* table, + const PixelFormat& inPF, void* inPtr, int inStride, + const PixelFormat& outPF, void* outPtr, int outStride, + int width, int height) +{ + OUTPIXEL* redTable = (OUTPIXEL*)table; + OUTPIXEL* greenTable = redTable + inPF.redMax + 1; + OUTPIXEL* blueTable = greenTable + inPF.greenMax + 1; + INPIXEL* ip = (INPIXEL*)inPtr; + OUTPIXEL* op = (OUTPIXEL*)outPtr; + int inExtra = inStride - width; + int outExtra = outStride - width; + + while (height > 0) { + OUTPIXEL* opEndOfRow = op + width; + while (op < opEndOfRow) { + *op++ = (redTable [(*ip >> inPF.redShift) & inPF.redMax] + + greenTable[(*ip >> inPF.greenShift) & inPF.greenMax] + + blueTable [(*ip >> inPF.blueShift) & inPF.blueMax]); + ip++; + } + ip += inExtra; + op += outExtra; + height--; + } +} + +// transRGBCubeINtoOUT is similar to transRGBINtoOUT but also looks up the +// colour cube index in a fourth table to yield a pixel value. + +void transRGBCubeINtoOUT (void* table, + const PixelFormat& inPF, void* inPtr, int inStride, + const PixelFormat& outPF, void* outPtr, + int outStride, int width, int height) +{ + OUTPIXEL* redTable = (OUTPIXEL*)table; + OUTPIXEL* greenTable = redTable + inPF.redMax + 1; + OUTPIXEL* blueTable = greenTable + inPF.greenMax + 1; + OUTPIXEL* cubeTable = blueTable + inPF.blueMax + 1; + INPIXEL* ip = (INPIXEL*)inPtr; + OUTPIXEL* op = (OUTPIXEL*)outPtr; + int inExtra = inStride - width; + int outExtra = outStride - width; + + while (height > 0) { + OUTPIXEL* opEndOfRow = op + width; + while (op < opEndOfRow) { + *op++ = cubeTable[(redTable [(*ip >> inPF.redShift) & inPF.redMax] + + greenTable[(*ip >> inPF.greenShift) & inPF.greenMax] + + blueTable [(*ip >> inPF.blueShift) & inPF.blueMax])]; + ip++; + } + ip += inExtra; + op += outExtra; + height--; + } +} + +#endif + +#undef INPIXEL +#undef OUTPIXEL +#undef transSimpleINtoOUT +#undef transRGBINtoOUT +#undef transRGBCubeINtoOUT |