diff --git a/src/utils/gradient.cpp b/src/utils/gradient.cpp index 001a174c..7446c725 100644 --- a/src/utils/gradient.cpp +++ b/src/utils/gradient.cpp @@ -1,601 +1,601 @@ -/* +/* Copyright (C) 1998, 1999, 2001, 2002, 2004, 2005, 2007 Daniel M. Duley (C) 2004 Zack Rusin (C) 2000 Josef Weidendorfer (C) 1999 Geert Jansen (C) 1998, 1999 Christian Tibirna (C) 1998, 1999 Dirk Mueller Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* Diagonal gradient code was inspired by BlackBox. BlackBox gradients are (C) Brad Hughes, and Mike Cole . */ #include "gradient.h" #include #include #include -QImage Tellico::gradient(const QSize &size, const QColor &ca, +QImage Tellico::gradient(QSize size, const QColor &ca, const QColor &cb, Tellico::GradientType eff) { QImage image(size, QImage::Format_RGB32); if(!size.isValid()) return(image); int rca, gca, bca, rcb, gcb, bcb; int rDiff = (rcb = cb.red()) - (rca = ca.red()); int gDiff = (gcb = cb.green()) - (gca = ca.green()); int bDiff = (bcb = cb.blue()) - (bca = ca.blue()); int x, y; QRgb rgb; if(eff == VerticalGradient || eff == HorizontalGradient){ int rl = rca << 16; int gl = gca << 16; int bl = bca << 16; QRgb *p; if(eff == VerticalGradient){ int rcdelta = ((1<<16) / size.height()) * rDiff; int gcdelta = ((1<<16) / size.height()) * gDiff; int bcdelta = ((1<<16) / size.height()) * bDiff; for(y=0; y < size.height(); ++y){ rl += rcdelta; gl += gcdelta; bl += bcdelta; rgb = qRgb( (rl>>16), (gl>>16), (bl>>16) ); p = (QRgb *)image.scanLine(y); for(x = 0; x < size.width(); ++x) *p++ = rgb; } } else{ // must be HorizontalGradient int rcdelta = ((1<<16) / size.width()) * rDiff; int gcdelta = ((1<<16) / size.width()) * gDiff; int bcdelta = ((1<<16) / size.width()) * bDiff; p = (QRgb *)image.scanLine(0); for(x = 0; x < size.width(); ++x){ rl += rcdelta; gl += gcdelta; bl += bcdelta; *p++ = qRgb((rl>>16), (gl>>16), (bl>>16)); } p = (QRgb *)image.scanLine(0); for(y = 1; y < size.height(); ++y) memcpy(image.scanLine(y), p, size.width()*sizeof(QRgb)); } } else{ float rfd, gfd, bfd; float rd = rca, gd = gca, bd = bca; int w = size.width(), h = size.height(); int dw = w*2, dh = h*2; unsigned char *xtable = new unsigned char[w*3]; unsigned char *ytable = new unsigned char[h*3]; if(eff == DiagonalGradient || eff == CrossDiagonalGradient){ rfd = (float)rDiff/dw; gfd = (float)gDiff/dw; bfd = (float)bDiff/dw; int dir; for(x=0; x < w; x++, rd+=rfd, gd+=gfd, bd+=bfd) { dir = eff == DiagonalGradient? x : w - x - 1; xtable[dir*3] = (unsigned char) rd; xtable[dir*3+1] = (unsigned char) gd; xtable[dir*3+2] = (unsigned char) bd; } rfd = (float)rDiff/dh; gfd = (float)gDiff/dh; bfd = (float)bDiff/dh; rd = gd = bd = 0; for(y = 0; y < h; y++, rd+=rfd, gd+=gfd, bd+=bfd){ ytable[y*3] = (unsigned char) rd; ytable[y*3+1] = (unsigned char) gd; ytable[y*3+2] = (unsigned char) bd; } for(y = 0; y < h; y++){ QRgb *p = (QRgb *)image.scanLine(y); for(x = 0; x < w; x++){ *p++ = qRgb(xtable[x*3] + ytable[y*3], xtable[x*3+1] + ytable[y*3+1], xtable[x*3+2] + ytable[y*3+2]); } } } else{ int rSign = rDiff>0? 1: -1; int gSign = gDiff>0? 1: -1; int bSign = bDiff>0? 1: -1; rfd = (float)rDiff/w; gfd = (float)gDiff/w; bfd = (float)bDiff/w; rd = (float)rDiff/2; gd = (float)gDiff/2; bd = (float)bDiff/2; for(x=0; x < w; x++, rd-=rfd, gd-=gfd, bd-=bfd){ xtable[x*3] = (unsigned char) qAbs((int)rd); xtable[x*3+1] = (unsigned char) qAbs((int)gd); xtable[x*3+2] = (unsigned char) qAbs((int)bd); } rfd = (float)rDiff/h; gfd = (float)gDiff/h; bfd = (float)bDiff/h; rd = (float)rDiff/2; gd = (float)gDiff/2; bd = (float)bDiff/2; for(y=0; y < h; y++, rd-=rfd, gd-=gfd, bd-=bfd){ ytable[y*3] = (unsigned char) qAbs((int)rd); ytable[y*3+1] = (unsigned char) qAbs((int)gd); ytable[y*3+2] = (unsigned char) qAbs((int)bd); } dw = (w+1)>>1; dh = (h+1)>>1; int x2; QRgb *sl1, *sl2; for(y = 0; y < dh; y++){ sl1 = (QRgb *)image.scanLine(y); sl2 = (QRgb *)image.scanLine(qMax(h-y-1, y)); for(x = 0, x2 = w-1; x < dw; x++, x2--){ switch(eff){ case PyramidGradient: rgb = qRgb(rcb-rSign*(xtable[x*3]+ytable[y*3]), gcb-gSign*(xtable[x*3+1]+ytable[y*3+1]), bcb-bSign*(xtable[x*3+2]+ytable[y*3+2])); break; case RectangleGradient: rgb = qRgb(rcb - rSign * qMax(xtable[x*3], ytable[y*3]) * 2, gcb - gSign * qMax(xtable[x*3+1], ytable[y*3+1]) * 2, bcb - bSign * qMax(xtable[x*3+2], ytable[y*3+2]) * 2); break; case PipeCrossGradient: rgb = qRgb(rcb - rSign * qMin(xtable[x*3], ytable[y*3]) * 2, gcb - gSign * qMin(xtable[x*3+1], ytable[y*3+1]) * 2, bcb - bSign * qMin(xtable[x*3+2], ytable[y*3+2]) * 2); break; case EllipticGradient: default: rgb = qRgb(rcb - rSign * (int)std::sqrt((xtable[x*3]*xtable[x*3] + ytable[y*3]*ytable[y*3])*2.0f), gcb - gSign * (int)std::sqrt((xtable[x*3+1]*xtable[x*3+1] + ytable[y*3+1]*ytable[y*3+1])*2.0f), bcb - bSign * (int)std::sqrt((xtable[x*3+2]*xtable[x*3+2] + ytable[y*3+2]*ytable[y*3+2])*2.0f)); break; } sl1[x] = sl2[x] = rgb; sl1[x2] = sl2[x2] = rgb; } } } delete [] xtable; delete [] ytable; } return(image); } -QImage Tellico::grayGradient(const QSize &size, unsigned char ca, - unsigned char cb, Tellico::GradientType eff) +QImage Tellico::grayGradient(QSize size, unsigned char ca, + unsigned char cb, Tellico::GradientType eff) { QImage image(size, QImage::Format_Indexed8); if(!size.isValid()) return(image); QVector colorTable(256); for(int i=0; i < 256; ++i) colorTable[i] = qRgba(i, i, i, 255); image.setColorTable(colorTable); int diff = cb - ca; int x, y; unsigned char idx; if(eff == VerticalGradient || eff == HorizontalGradient){ int val = ca << 16; unsigned char *p; if(eff == VerticalGradient){ int delta = ((1<<16) / size.height()) * diff; for(y=0; y < size.height(); ++y){ val += delta; idx = val >> 16; p = image.scanLine(y); for(x = 0; x < size.width(); ++x) *p++ = idx; } } else{ // must be HorizontalGradient int delta = ((1<<16) / size.width()) * diff; p = image.scanLine(0); for(x = 0; x < size.width(); ++x){ val += delta; *p++ = val >> 16; } p = image.scanLine(0); for(y = 1; y < size.height(); ++y) memcpy(image.scanLine(y), p, image.bytesPerLine()); } } else{ float delta, val=ca; unsigned int w = size.width(), h = size.height(); unsigned char *xtable = new unsigned char[w]; unsigned char *ytable = new unsigned char[h]; w*=2, h*=2; if(eff == DiagonalGradient || eff == CrossDiagonalGradient){ delta = (float)diff/w; int dir; for(x=0; x < size.width(); x++, val+=delta){ dir = eff == DiagonalGradient? x : size.width() - x - 1; xtable[dir] = (unsigned char) val; } delta = (float)diff/h; val = 0; for(y = 0; y < size.height(); y++, val+=delta) ytable[y] = (unsigned char) val; for(y = 0; y < size.height(); y++){ unsigned char *p = image.scanLine(y); for(x = 0; x < size.width(); x++) *p++ = xtable[x] + ytable[y]; } } else{ int sign = diff>0? 1: -1; delta = (float)diff / size.width(); val = (float)diff/2; for(x=0; x < size.width(); x++, val-=delta) xtable[x] = (unsigned char) qAbs((int)val); delta = (float)diff/size.height(); val = (float)diff/2; for(y=0; y < size.height(); y++, val-=delta) ytable[y] = (unsigned char) qAbs((int)val); int w = (size.width()+1)>>1; int h = (size.height()+1)>>1; int x2; unsigned char *sl1, *sl2; for(y = 0; y < h; y++){ sl1 = image.scanLine(y); sl2 = image.scanLine(qMax(size.height()-y-1, y)); for(x = 0, x2 = size.width()-1; x < w; x++, x2--){ switch(eff){ case PyramidGradient: idx = cb-sign*(xtable[x]+ytable[y]); break; case RectangleGradient: idx = cb-sign*qMax(xtable[x], ytable[y])*2; break; case PipeCrossGradient: idx = cb-sign*qMin(xtable[x], ytable[y])*2; break; case EllipticGradient: default: idx = cb - sign * (int)std::sqrt((xtable[x]*xtable[x] + ytable[y]*ytable[y])*2.0f); break; } sl1[x] = sl2[x] = idx; sl1[x2] = sl2[x2] = idx; } } } delete [] xtable; delete [] ytable; } return(image); } -QImage Tellico::unbalancedGradient(const QSize &size, const QColor &ca, - const QColor &cb, Tellico::GradientType eff, - int xfactor, int yfactor) +QImage Tellico::unbalancedGradient(QSize size, const QColor &ca, + const QColor &cb, Tellico::GradientType eff, + int xfactor, int yfactor) { QImage image(size, QImage::Format_RGB32); if(!size.isValid()) return image; int dir; // general parameter used for direction switches bool _xanti = (xfactor < 0); // negative on X direction bool _yanti = (yfactor < 0); // negative on Y direction xfactor = qBound(1, qAbs(xfactor), 200); yfactor = qBound(1, qAbs(yfactor), 200); // float xbal = xfactor/5000.; // float ybal = yfactor/5000.; float xbal = xfactor/30.0f/size.width(); float ybal = yfactor/30.0f/size.height(); float rat; int x, y; int rca, gca, bca, rcb, gcb, bcb; int rDiff = (rcb = cb.red()) - (rca = ca.red()); int gDiff = (gcb = cb.green()) - (gca = ca.green()); int bDiff = (bcb = cb.blue()) - (bca = ca.blue()); if(eff == VerticalGradient || eff == HorizontalGradient){ QRgb *p; if(eff == VerticalGradient){ QRgb rgbRow; for(y=0; y < size.height(); y++){ dir = _yanti ? y : size.height() - 1 - y; rat = 1 - std::exp( - (float)y * ybal ); p = (QRgb *) image.scanLine(dir); rgbRow = qRgb(rcb - (int) ( rDiff * rat ), gcb - (int) ( gDiff * rat ), bcb - (int) ( bDiff * rat )); for(x = 0; x < size.width(); x++) *p++ = rgbRow; } } else{ p = (QRgb *)image.scanLine(0); for(x = 0; x < size.width(); x++){ dir = _xanti ? x : size.width() - 1 - x; rat = 1 - std::exp( - (float)x * xbal ); p[dir] = qRgb(rcb - (int) ( rDiff * rat ), gcb - (int) ( gDiff * rat ), bcb - (int) ( bDiff * rat )); } p = (QRgb *)image.scanLine(0); for(y = 1; y < size.height(); ++y){ memcpy(image.scanLine(y), p, size.width()*sizeof(QRgb)); } } } else{ int w=size.width(), h=size.height(); unsigned char *xtable = new unsigned char[w*3]; unsigned char *ytable = new unsigned char[h*3]; QRgb *p; if(eff == DiagonalGradient || eff == CrossDiagonalGradient){ for(x = 0; x < w; x++){ dir = _xanti ? x : w - 1 - x; rat = 1 - std::exp( - (float)x * xbal ); xtable[dir*3] = (unsigned char) ( rDiff/2 * rat ); xtable[dir*3+1] = (unsigned char) ( gDiff/2 * rat ); xtable[dir*3+2] = (unsigned char) ( bDiff/2 * rat ); } for(y = 0; y < h; y++){ dir = _yanti ? y : h - 1 - y; rat = 1 - std::exp( - (float)y * ybal ); ytable[dir*3] = (unsigned char) ( rDiff/2 * rat ); ytable[dir*3+1] = (unsigned char) ( gDiff/2 * rat ); ytable[dir*3+2] = (unsigned char) ( bDiff/2 * rat ); } for(y = 0; y < h; y++){ p = (QRgb *)image.scanLine(y); for(x = 0; x < w; x++){ *p++ = qRgb(rcb - (xtable[x*3] + ytable[y*3]), gcb - (xtable[x*3+1] + ytable[y*3+1]), bcb - (xtable[x*3+2] + ytable[y*3+2])); } } } else{ int rSign = rDiff>0? 1: -1; int gSign = gDiff>0? 1: -1; int bSign = bDiff>0? 1: -1; for(x = 0; x < w; x++){ dir = _xanti ? x : w - 1 - x; rat = 1 - std::exp( - (float)x * xbal ); xtable[dir*3] = (unsigned char) qAbs((int)(rDiff*(0.5-rat))); xtable[dir*3+1] = (unsigned char) qAbs((int)(gDiff*(0.5-rat))); xtable[dir*3+2] = (unsigned char) qAbs((int)(bDiff*(0.5-rat))); } for(y = 0; y < h; y++){ dir = _yanti ? y : h - 1 - y; rat = 1 - std::exp( - (float)y * ybal ); ytable[dir*3] = (unsigned char) qAbs((int)(rDiff*(0.5-rat))); ytable[dir*3+1] = (unsigned char) qAbs((int)(gDiff*(0.5-rat))); ytable[dir*3+2] = (unsigned char) qAbs((int)(bDiff*(0.5-rat))); } for(y = 0; y < h; y++){ p = (QRgb *)image.scanLine(y); for(x = 0; x < w; x++) { if (eff == PyramidGradient){ *p++ = qRgb(rcb-rSign*(xtable[x*3]+ytable[y*3]), gcb-gSign*(xtable[x*3+1]+ytable[y*3+1]), bcb-bSign*(xtable[x*3+2]+ytable[y*3+2])); } else if (eff == RectangleGradient){ *p++ = qRgb(rcb - rSign * qMax(xtable[x*3], ytable[y*3]) * 2, gcb - gSign * qMax(xtable[x*3+1], ytable[y*3+1]) * 2, bcb - bSign * qMax(xtable[x*3+2], ytable[y*3+2]) * 2); } else if (eff == PipeCrossGradient){ *p++ = qRgb(rcb - rSign * qMin(xtable[x*3], ytable[y*3]) * 2, gcb - gSign * qMin(xtable[x*3+1], ytable[y*3+1]) * 2, bcb - bSign * qMin(xtable[x*3+2], ytable[y*3+2]) * 2); } else if (eff == EllipticGradient){ *p++ = qRgb(rcb - rSign * (int)std::sqrt((xtable[x*3]*xtable[x*3] + ytable[y*3]*ytable[y*3])*2.0), gcb - gSign * (int)std::sqrt((xtable[x*3+1]*xtable[x*3+1] + ytable[y*3+1]*ytable[y*3+1])*2.0), bcb - bSign * (int)std::sqrt((xtable[x*3+2]*xtable[x*3+2] + ytable[y*3+2]*ytable[y*3+2])*2.0)); } } } } delete [] xtable; delete [] ytable; } return(image); } -QImage Tellico::grayUnbalancedGradient(const QSize &size, unsigned char ca, - unsigned char cb, Tellico::GradientType eff, - int xfactor, int yfactor) +QImage Tellico::grayUnbalancedGradient(QSize size, unsigned char ca, + unsigned char cb, Tellico::GradientType eff, + int xfactor, int yfactor) { QImage image(size, QImage::Format_Indexed8); if(!size.isValid()) return(image); QVector colorTable(256); for(int i=0; i < 256; ++i) colorTable[i] = qRgba(i, i, i, 255); image.setColorTable(colorTable); int dir; // general parameter used for direction switches bool _xanti = (xfactor < 0); // negative on X direction bool _yanti = (yfactor < 0); // negative on Y direction xfactor = qBound(1, qAbs(xfactor), 200); yfactor = qBound(1, qAbs(yfactor), 200); float xbal = xfactor/30.0f/size.width(); float ybal = yfactor/30.0f/size.height(); float rat; int x, y; int diff = cb-ca; if(eff == VerticalGradient || eff == HorizontalGradient){ unsigned char *p; if(eff == VerticalGradient){ unsigned char idx; for(y=0; y < size.height(); y++){ dir = _yanti ? y : size.height() - 1 - y; rat = 1 - std::exp( - (float)y * ybal ); p = image.scanLine(dir); idx = cb - (int)( diff * rat ); for(x = 0; x < size.width(); x++) *p++ = idx; } } else{ p = image.scanLine(0); for(x = 0; x < size.width(); x++){ dir = _xanti ? x : size.width() - 1 - x; rat = 1 - std::exp( - (float)x * xbal ); p[dir] = cb - (int)( diff * rat ); } p = image.scanLine(0); for(y = 1; y < size.height(); ++y) memcpy(image.scanLine(y), p, image.bytesPerLine()); } } else{ int w=size.width(), h=size.height(); unsigned char *xtable = new unsigned char[w]; unsigned char *ytable = new unsigned char[h]; unsigned char *p; if(eff == DiagonalGradient || eff == CrossDiagonalGradient){ for(x = 0; x < w; x++){ dir = _xanti ? x : w - 1 - x; rat = 1 - std::exp( - (float)x * xbal ); xtable[dir] = (unsigned char) ( diff/2 * rat ); } for(y = 0; y < h; y++){ dir = _yanti ? y : h - 1 - y; rat = 1 - std::exp( - (float)y * ybal ); ytable[dir] = (unsigned char) ( diff/2 * rat ); } for(y = 0; y < h; y++){ p = image.scanLine(y); for(x = 0; x < w; x++) *p++ = cb - (xtable[x] + ytable[y]); } } else{ int sign = diff>0? 1: -1; for(x = 0; x < w; x++){ dir = _xanti ? x : w - 1 - x; rat = 1 - std::exp( - (float)x * xbal ); xtable[dir] = (unsigned char) qAbs((int)(diff*(0.5-rat))); } for(y = 0; y < h; y++){ dir = _yanti ? y : h - 1 - y; rat = 1 - std::exp( - (float)y * ybal ); ytable[dir] = (unsigned char) qAbs((int)(diff*(0.5-rat))); } for(y = 0; y < h; y++){ p = image.scanLine(y); for(x = 0; x < w; x++) { if (eff == PyramidGradient) *p++ = cb-sign*(xtable[x]+ytable[y]); else if (eff == RectangleGradient) *p++ = cb -sign*qMax(xtable[x], ytable[y])*2; else if (eff == PipeCrossGradient) *p++ = cb-sign*qMin(xtable[x], ytable[y])*2; else if (eff == EllipticGradient) *p++ = cb-sign * (int)std::sqrt((xtable[x]*xtable[x] + ytable[y]*ytable[y])*2.0); } } } delete [] xtable; delete [] ytable; } return(image); } diff --git a/src/utils/gradient.h b/src/utils/gradient.h index 9b0a5bd6..fba16390 100644 --- a/src/utils/gradient.h +++ b/src/utils/gradient.h @@ -1,100 +1,100 @@ #ifndef __BLITZ_H #define __BLITZ_H -/* +/* Copyright (C) 1998, 1999, 2001, 2002, 2004, 2005, 2007 Daniel M. Duley (C) 2004 Zack Rusin (C) 2000 Josef Weidendorfer (C) 1999 Geert Jansen (C) 1998, 1999 Christian Tibirna (C) 1998, 1999 Dirk Mueller Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include namespace Tellico { enum GradientType {VerticalGradient=0, HorizontalGradient, DiagonalGradient, CrossDiagonalGradient, PyramidGradient, RectangleGradient, PipeCrossGradient, EllipticGradient}; /** * Create a gradient from color a to color b of the specified type. * * @param size The desired size of the gradient. * @param ca Color a * @param cb Color b * @param type The type of gradient. * @return The gradient. */ - QImage gradient(const QSize &size, const QColor &ca, + QImage gradient(QSize size, const QColor &ca, const QColor &cb, GradientType type); /** * Creates an 8bit grayscale gradient suitable for use as an alpha channel * using QImage::setAlphaChannel(). * * @param size The desired size of the gradient. * @param ca The grayscale start value. * @param cb The grayscale end value. * @param type The type of gradient. * @return The gradient. */ - QImage grayGradient(const QSize &size, unsigned char ca, + QImage grayGradient(QSize size, unsigned char ca, unsigned char cb, GradientType type); /** * Create an unbalanced gradient. An unbalanced gradient is a gradient * where the transition from color a to color b is not linear, but in this * case exponential. * * @param size The desired size of the gradient. * @param ca Color a * @param cb Color b * @param type The type of gradient. * @param xfactor The x decay length. Use a value between -200 and 200. * @param yfactor The y decay length. * @return The gradient. */ - QImage unbalancedGradient(const QSize &size, const QColor &ca, + QImage unbalancedGradient(QSize size, const QColor &ca, const QColor &cb, GradientType type, int xfactor=100, int yfactor=100); /** * Creates an 8bit grayscale gradient suitable for use as an alpha channel * using QImage::setAlphaChannel(). * * @param size The desired size of the gradient. * @param type The type of gradient. * @param ca The grayscale start value. * @param cb The grayscale end value. * @param xfactor The x decay length. Use a value between -200 and 200. * @param yfactor The y decay length. * @return The gradient. */ - QImage grayUnbalancedGradient(const QSize &size, unsigned char ca, + QImage grayUnbalancedGradient(QSize size, unsigned char ca, unsigned char cb, GradientType type, int xfactor=100, int yfactor=100); } #endif