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390 lines
10 KiB
390 lines
10 KiB
/*
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* This file is part of the KDE libraries
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* Copyright (C) 1998 Mark Donohoe <donohoe@kde.org>
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* Stephan Kulow <coolo@kde.org>
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*
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* $Id$
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include <tqpixmap.h>
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#include <tqpainter.h>
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#include <tqimage.h>
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#include <tqbitmap.h>
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#include <tqcolor.h>
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#include <stdlib.h>
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#include "kpixmap.h"
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// Fast diffuse dither to 3x3x3 color cube
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// Based on Qt's image conversion functions
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static bool kdither_32_to_8( const TQImage *src, TQImage *dst )
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{
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// TQRgb *p;
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uchar *b;
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int y;
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if ( !dst->create(src->width(), src->height(), 8, 256) ) {
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tqWarning("KPixmap: destination image not valid\n");
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return false;
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}
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dst->setNumColors( 256 );
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#define MAX_R 2
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#define MAX_G 2
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#define MAX_B 2
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#define INDEXOF(r,g,b) (((r)*(MAX_G+1)+(g))*(MAX_B+1)+(b))
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int rc, gc, bc;
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for ( rc=0; rc<=MAX_R; rc++ ) // build 2x2x2 color cube
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for ( gc=0; gc<=MAX_G; gc++ )
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for ( bc=0; bc<=MAX_B; bc++ ) {
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dst->setColor( INDEXOF(rc,gc,bc),
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tqRgb( rc*255/MAX_R, gc*255/MAX_G, bc*255/MAX_B ) );
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}
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int sw = src->width();
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int* line1[3];
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int* line2[3];
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int* pv[3];
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line1[0] = new int[src->width()];
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line2[0] = new int[src->width()];
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line1[1] = new int[src->width()];
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line2[1] = new int[src->width()];
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line1[2] = new int[src->width()];
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line2[2] = new int[src->width()];
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pv[0] = new int[sw];
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pv[1] = new int[sw];
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pv[2] = new int[sw];
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for ( y=0; y < src->height(); y++ ) {
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// p = (TQRgb *)src->scanLine(y);
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b = dst->scanLine(y);
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int endian = (TQImage::systemBitOrder() == TQImage::BigEndian);
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int x;
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uchar* q = const_cast<TQImage*>(src)->scanLine(y);
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uchar* q2 = const_cast<TQImage*>(src)->scanLine(y+1 < src->height() ? y + 1 : 0);
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for (int chan = 0; chan < 3; chan++) {
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b = dst->scanLine(y);
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int *l1 = (y&1) ? line2[chan] : line1[chan];
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int *l2 = (y&1) ? line1[chan] : line2[chan];
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if ( y == 0 ) {
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for (int i=0; i<sw; i++)
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l1[i] = q[i*4+chan+endian];
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}
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if ( y+1 < src->height() ) {
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for (int i=0; i<sw; i++)
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l2[i] = q2[i*4+chan+endian];
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}
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// Bi-directional error diffusion
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if ( y&1 ) {
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for (x=0; x<sw; x++) {
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int pix = TQMAX(TQMIN(2, (l1[x] * 2 + 128)/ 255), 0);
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int err = l1[x] - pix * 255 / 2;
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pv[chan][x] = pix;
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// Spread the error around...
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if ( x+1<sw ) {
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l1[x+1] += (err*7)>>4;
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l2[x+1] += err>>4;
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}
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l2[x]+=(err*5)>>4;
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if (x>1)
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l2[x-1]+=(err*3)>>4;
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}
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} else {
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for (x=sw; x-->0; ) {
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int pix = TQMAX(TQMIN(2, (l1[x] * 2 + 128)/ 255), 0);
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int err = l1[x] - pix * 255 / 2;
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pv[chan][x] = pix;
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// Spread the error around...
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if ( x > 0 ) {
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l1[x-1] += (err*7)>>4;
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l2[x-1] += err>>4;
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}
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l2[x]+=(err*5)>>4;
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if (x+1 < sw)
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l2[x+1]+=(err*3)>>4;
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}
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}
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}
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if (!endian) {
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for (x=0; x<sw; x++)
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*b++ = INDEXOF(pv[2][x],pv[1][x],pv[0][x]);
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} else {
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for (x=0; x<sw; x++)
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*b++ = INDEXOF(pv[0][x],pv[1][x],pv[2][x]);
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}
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}
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delete [] line1[0];
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delete [] line2[0];
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delete [] line1[1];
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delete [] line2[1];
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delete [] line1[2];
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delete [] line2[2];
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delete [] pv[0];
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delete [] pv[1];
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delete [] pv[2];
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#undef MAX_R
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#undef MAX_G
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#undef MAX_B
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#undef INDEXOF
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return true;
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}
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KPixmap::~KPixmap()
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{
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}
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bool KPixmap::load( const TQString& fileName, const char *format,
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int conversion_flags )
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{
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TQImageIO io( fileName, format );
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bool result = io.read();
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if ( result ) {
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detach();
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result = convertFromImage( io.image(), conversion_flags );
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}
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return result;
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}
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bool KPixmap::load( const TQString& fileName, const char *format,
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ColorMode mode )
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{
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int conversion_flags = 0;
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switch (mode) {
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case Color:
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conversion_flags |= ColorOnly;
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break;
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case Mono:
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conversion_flags |= MonoOnly;
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break;
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case LowColor:
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conversion_flags |= LowOnly;
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break;
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case WebColor:
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conversion_flags |= WebOnly;
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break;
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default:
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break;// Nothing.
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}
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return load( fileName, format, conversion_flags );
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}
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bool KPixmap::convertFromImage( const TQImage &img, ColorMode mode )
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{
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int conversion_flags = 0;
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switch (mode) {
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case Color:
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conversion_flags |= ColorOnly;
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break;
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case Mono:
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conversion_flags |= MonoOnly;
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break;
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case LowColor:
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conversion_flags |= LowOnly;
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break;
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case WebColor:
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conversion_flags |= WebOnly;
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break;
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default:
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break; // Nothing.
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}
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return convertFromImage( img, conversion_flags );
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}
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bool KPixmap::convertFromImage( const TQImage &img, int conversion_flags )
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{
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if ( img.isNull() ) {
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#if defined(CHECK_NULL)
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tqWarning( "KPixmap::convertFromImage: Cannot convert a null image" );
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#endif
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return false;
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}
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detach(); // detach other references
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int dd = defaultDepth();
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// If color mode not one of KPixmaps extra modes nothing to do
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if ( ( conversion_flags & KColorMode_Mask ) != LowOnly &&
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( conversion_flags & KColorMode_Mask ) != WebOnly ) {
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return TQPixmap::convertFromImage ( img, conversion_flags );
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}
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// If the default pixmap depth is not 8bpp, KPixmap color modes have no
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// effect. Ignore them and use AutoColor instead.
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if ( dd > 8 ) {
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if ( ( conversion_flags & KColorMode_Mask ) == LowOnly ||
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( conversion_flags & KColorMode_Mask ) == WebOnly )
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conversion_flags = (conversion_flags & ~KColorMode_Mask) | Auto;
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return TQPixmap::convertFromImage ( img, conversion_flags );
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}
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if ( ( conversion_flags & KColorMode_Mask ) == LowOnly ) {
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// Here we skimp a little on the possible conversion modes
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// Don't offer ordered or threshold dither of RGB channels or
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// diffuse or ordered dither of alpha channel. It hardly seems
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// worth the effort for this specialized mode.
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// If image uses icon palette don't dither it.
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if( img.numColors() > 0 && img.numColors() <=40 ) {
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if ( checkColorTable( img ) )
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return TQPixmap::convertFromImage( img, TQPixmap::Auto );
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}
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TQBitmap mask;
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bool isMask = false;
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TQImage image = img.convertDepth(32);
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TQImage tImage( image.width(), image.height(), 8, 256 );
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if( img.hasAlphaBuffer() ) {
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image.setAlphaBuffer( true );
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tImage.setAlphaBuffer( true );
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isMask = mask.convertFromImage( img.createAlphaMask() );
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}
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kdither_32_to_8( &image, &tImage );
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if( TQPixmap::convertFromImage( tImage ) ) {
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if ( isMask ) TQPixmap::setMask( mask );
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return true;
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} else
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return false;
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} else {
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TQImage image = img.convertDepth( 32 );
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image.setAlphaBuffer( img.hasAlphaBuffer() );
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conversion_flags = (conversion_flags & ~ColorMode_Mask) | Auto;
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return TQPixmap::convertFromImage ( image, conversion_flags );
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}
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}
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static TQColor* kpixmap_iconPalette = 0;
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bool KPixmap::checkColorTable( const TQImage &image )
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{
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int i = 0;
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if (kpixmap_iconPalette == 0) {
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kpixmap_iconPalette = new TQColor[40];
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// Standard palette
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kpixmap_iconPalette[i++] = red;
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kpixmap_iconPalette[i++] = green;
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kpixmap_iconPalette[i++] = blue;
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kpixmap_iconPalette[i++] = cyan;
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kpixmap_iconPalette[i++] = magenta;
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kpixmap_iconPalette[i++] = yellow;
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kpixmap_iconPalette[i++] = darkRed;
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kpixmap_iconPalette[i++] = darkGreen;
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kpixmap_iconPalette[i++] = darkBlue;
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kpixmap_iconPalette[i++] = darkCyan;
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kpixmap_iconPalette[i++] = darkMagenta;
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kpixmap_iconPalette[i++] = darkYellow;
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kpixmap_iconPalette[i++] = white;
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kpixmap_iconPalette[i++] = lightGray;
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kpixmap_iconPalette[i++] = gray;
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kpixmap_iconPalette[i++] = darkGray;
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kpixmap_iconPalette[i++] = black;
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// Pastels
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kpixmap_iconPalette[i++] = TQColor( 255, 192, 192 );
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kpixmap_iconPalette[i++] = TQColor( 192, 255, 192 );
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kpixmap_iconPalette[i++] = TQColor( 192, 192, 255 );
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kpixmap_iconPalette[i++] = TQColor( 255, 255, 192 );
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kpixmap_iconPalette[i++] = TQColor( 255, 192, 255 );
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kpixmap_iconPalette[i++] = TQColor( 192, 255, 255 );
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// Reds
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kpixmap_iconPalette[i++] = TQColor( 64, 0, 0 );
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kpixmap_iconPalette[i++] = TQColor( 192, 0, 0 );
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// Oranges
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kpixmap_iconPalette[i++] = TQColor( 255, 128, 0 );
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kpixmap_iconPalette[i++] = TQColor( 192, 88, 0 );
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kpixmap_iconPalette[i++] = TQColor( 255, 168, 88 );
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kpixmap_iconPalette[i++] = TQColor( 255, 220, 168 );
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// Blues
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kpixmap_iconPalette[i++] = TQColor( 0, 0, 192 );
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// Turquoise
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kpixmap_iconPalette[i++] = TQColor( 0, 64, 64 );
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kpixmap_iconPalette[i++] = TQColor( 0, 192, 192 );
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// Yellows
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kpixmap_iconPalette[i++] = TQColor( 64, 64, 0 );
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kpixmap_iconPalette[i++] = TQColor( 192, 192, 0 );
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// Greens
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kpixmap_iconPalette[i++] = TQColor( 0, 64, 0 );
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kpixmap_iconPalette[i++] = TQColor( 0, 192, 0 );
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// Purples
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kpixmap_iconPalette[i++] = TQColor( 192, 0, 192 );
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// Greys
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kpixmap_iconPalette[i++] = TQColor( 88, 88, 88 );
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kpixmap_iconPalette[i++] = TQColor( 48, 48, 48 );
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kpixmap_iconPalette[i++] = TQColor( 220, 220, 220 );
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}
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TQRgb* ctable = image.tqcolorTable();
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int ncols = image.numColors();
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int j;
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// Allow one failure which could be transparent background
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int failures = 0;
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for ( i=0; i<ncols; i++ ) {
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for ( j=0; j<40; j++ ) {
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if ( kpixmap_iconPalette[j].red() == tqRed( ctable[i] ) &&
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kpixmap_iconPalette[j].green() == tqGreen( ctable[i] ) &&
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kpixmap_iconPalette[j].blue() == tqBlue( ctable[i] ) ) {
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break;
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}
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}
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if ( j == 40 ) {
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failures ++;
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}
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}
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return ( failures <= 1 );
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}
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KPixmap::KPixmap(const TQPixmap& p)
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: TQPixmap(p)
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{
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}
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