Alessandro Bonazzi
8c43d5cf2f
Files correlati : cg0.exe cg0700a.msk cg0700b.msk cg3.exe cg4.exe Bug : Commento: Merge 1.0 libraries
133 lines
4.0 KiB
C++
133 lines
4.0 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <qimage.h>
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#include <qcolor.h>
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static inline int blendComponent( int v, int av, int s, int as )
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{
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//shadow gets a color inversely proportional to the
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//alpha value
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s = (s*(255-as))/255;
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//then do standard blending
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return as*s + av*v -(av*as*s)/255;
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}
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static inline QRgb blendShade( QRgb v, QRgb s )
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{
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//pick a number: shadow is 1/3 of object
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int as = qAlpha(s)/3;
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int av = qAlpha(v);
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if ( as == 0 || av == 255 )
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return v;
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int a = as + av -(as*av)/255;
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int r = blendComponent( qRed(v),av, qRed(s), as)/a;
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int g = blendComponent( qGreen(v),av, qGreen(s), as)/a;
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int b = blendComponent( qBlue(v),av, qBlue(s), as)/a;
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return qRgba(r,g,b,a);
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}
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int main( int*, char**)
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{
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QImage *img;
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img = new QImage( "in.png" );
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int w,h;
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int y;
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img->setAlphaBuffer( TRUE );
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*img = img->convertDepth( 32 );
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w = img->width();
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h = img->height();
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#if 0
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for ( y = 0; y < h; y ++ ) {
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uint *line = (uint*)img->scanLine( y );
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for ( int x = 0; x < w; x++ ) {
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uint pixel = line[x];
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int r = qRed(pixel);
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int g = qGreen(pixel);
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int b = qBlue(pixel);
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int min = QMIN( r, QMIN( g, b ) );
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int max = QMAX( r, QMAX( g, b ) );
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r -= min;
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g -= min;
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b -= min;
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if ( max !=min ) {
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r = (r*255)/(max-min);
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g = (g*255)/(max-min);
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b = (b*255)/(max-min);
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}
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int a = 255-min;
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a -= (max-min)/3; //hack more transparency for colors.
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line[x] = qRgba( r, g, b, a );
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}
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}
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#endif
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*img = img->smoothScale( w/2, h/2 );
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qDebug( "saving out.png");
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img->save( "out.png", "PNG" );
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w = img->width();
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h = img->height();
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QImage *img2 = new QImage( w, h, 32 );
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img2->setAlphaBuffer( TRUE );
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for ( y = 0; y < h; y++ ) {
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for ( int x = 0; x < w; x++ ) {
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QRgb shader = img->pixel( x, y );
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int as = qAlpha(shader)/3;
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int r = (qRed(shader)*(255-as))/255;
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int g = (qGreen(shader)*(255-as))/255;
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int b = (qBlue(shader)*(255-as))/255;
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img2->setPixel( x, y, qRgba(r,g,b,as) );
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}
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}
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img2->save( "outshade.png", "PNG" );
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}
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