mirror of
https://github.com/TigerVNC/tigervnc.git
synced 2024-08-21 17:54:34 +02:00
![Constantin Kaplinsky](/assets/img/avatar_default.png)
git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@2 3789f03b-4d11-0410-bbf8-ca57d06f2519
152 lines
5.1 KiB
C
152 lines
5.1 KiB
C
/* Copyright (C) 2002-2003 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
|