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diff --git a/tdefx/kimageeffect.h b/tdefx/kimageeffect.h new file mode 100644 index 000000000..8d73e5bfb --- /dev/null +++ b/tdefx/kimageeffect.h @@ -0,0 +1,817 @@ +/* This file is part of the KDE libraries + Copyright (C) 1998, 1999, 2001, 2002 Daniel M. Duley <mosfet@interaccess.com> + (C) 1998, 1999 Christian Tibirna <ctibirna@total.net> + (C) 1998, 1999 Dirk Mueller <mueller@kde.org> + +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. + +*/ + +// $Id$ + +#ifndef __KIMAGE_EFFECT_H +#define __KIMAGE_EFFECT_H + +#include <kdelibs_export.h> + +class TQImage; +class TQSize; +class TQColor; +class TQPoint; +class TQRect; + +/** + * This class includes various TQImage based graphical effects. + * + * Everything is + * static, so there is no need to create an instance of this class. You can + * just call the static methods. They are encapsulated here merely to provide + * a common namespace. + */ +class KDEFX_EXPORT KImageEffect +{ +public: + /** + * This enum provides a gradient type specification + * @see KImageEffect::blend(), KImageEffect::gradient(), + * KImageEffect::unbalancedGradient() + */ + enum GradientType { VerticalGradient, + HorizontalGradient, + DiagonalGradient, + CrossDiagonalGradient, + PyramidGradient, + RectangleGradient, + PipeCrossGradient, + EllipticGradient + }; + + /** + * This enum provides a RGB channel specification + * @see KImageEffect::blend(), KImageEffect::channelIntensity(), + * KImageEffect::modulate() + */ + enum RGBComponent { Red, //!< Red channel + Green, //!< Green channel + Blue, //!< Blue channel + Gray, //!< Grey channel + All //!< All channels + }; + + /** + * This enum provides a lighting direction specification + * @see KImageEffect::hash() + */ + enum Lighting {NorthLite, //!< Lighting from the top of the image + NWLite, //!< Lighting from the top left of the image + WestLite, //!< Lighting from the left of the image + SWLite, //!< Lighting from the bottom left of the image + SouthLite, //!< Lighting from the bottom of the image + SELite, //!< Lighting from the bottom right of the image + EastLite, //!< Lighting from the right of the image + NELite //!< Lighting from the top right of the image + }; + + /** + * This enum provides a modulation type specification + * @see KImageEffect::modulate() + */ + enum ModulationType { Intensity, //!< Modulate image intensity + Saturation, //!< Modulate image saturation + HueShift, //!< Modulate image hue + Contrast //!< Modulate image contrast + }; + + /** + * This enum provides a noise type specification + * @see KImageEffect::addNoise() + */ + enum NoiseType { UniformNoise=0, //!< Uniform distribution + GaussianNoise, //!< Gaussian distribution + MultiplicativeGaussianNoise, //!< Multiplicative Gaussian distribution + ImpulseNoise, //!< Impulse distribution + LaplacianNoise, //!< Laplacian distribution + PoissonNoise //!< Poisson distribution + }; + + /** + * This enum provides a rotation specification. + * @see KImageEffect::rotate() + */ + enum RotateDirection{ Rotate90, //!< Rotate 90 degrees to the right. + Rotate180, //!< Rotate 180 degrees. + Rotate270 //!< Rotate 90 degrees to the left. + }; + + /** + * This enum lists possible bumpmapping implementations. + * @see KImageEffect::bumpmap() + */ + enum BumpmapType { + Linear, + Spherical, + Sinuosidal + }; + + /** + * 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. + * @param ncols The number of colors to use when not running on a + * truecolor display. The gradient will be dithered to this number of + * colors. Pass 0 to prevent dithering. + */ + static TQImage gradient(const TQSize &size, const TQColor &ca, + const TQColor &cb, GradientType type, int ncols=3); + + /** + * 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. + * @param ncols The number of colors. See KImageEffect:gradient. + */ + static TQImage unbalancedGradient(const TQSize &size, const TQColor &ca, + const TQColor &cb, GradientType type, int xfactor = 100, + int yfactor = 100, int ncols = 3); + + /** + * Blends a color into the destination image, using an opacity + * value for blending one into another. Very fast direct pixel + * manipulation is used. + * + * This function uses MMX and SSE2 instructions to blend the + * image on processors that support it. + * + * @param clr source color to be blended into the destination image. + * @param dst destination image in which the source will be blended into. + * @param opacity opacity (between 0.0 and 1.0) which determines how much + * the source color will be blended into the destination image. + * @return The destination image (dst) containing the result. + * @author Karol Szwed (gallium@kde.org) + * @author Fredrik Höglund (fredrik@kde.org) + */ + static TQImage& blend(const TQColor& clr, TQImage& dst, float opacity); + + /** + * Blend the src image into the destination image, using an opacity + * value for blending one into another. Very fast direct pixel + * manipulation is used. + * + * This function uses MMX and SSE2 instructions to blend the + * images on processors that support it. + * + * @param src source image to be blended into the destination image. + * @param dst destination image in which the source will be blended into. + * @param opacity opacity (between 0.0 and 1.0) which determines how much + * the source image will be blended into the destination image. + * @return The destination image (dst) containing the result. + * @author Karol Szwed (gallium@kde.org) + * @author Fredrik Höglund (fredrik@kde.org) + */ + static TQImage& blend(TQImage& src, TQImage& dst, float opacity); + + /** + * Blend the provided image into a background of the indicated color. + * + * @param initial_intensity this parameter takes values from -1 to 1: + * a) if positive: how much to fade the image in its + * less affected spot + * b) if negative: roughly indicates how much of the image + * remains unaffected + * @param bgnd indicates the color of the background to blend in + * @param eff lets you choose what kind of blending you like + * @param anti_dir blend in the opposite direction (makes no much sense + * with concentric blending effects) + * @param image must be 32bpp + */ + static TQImage& blend(TQImage &image, float initial_intensity, + const TQColor &bgnd, GradientType eff, + bool anti_dir=false); + + /** + * Blend an image into another one, using a gradient type + * for blending from one to another. + * + * @param image1 source1 and result of blending + * @param image2 source2 of blending + * @param gt gradient type for blending between source1 and source2 + * @param xf x decay length for unbalanced gradient tpye + * @param yf y decay length for unbalanced gradient tpye + */ + static TQImage& blend(TQImage &image1,TQImage &image2, + GradientType gt, int xf=100, int yf=100); + + /** + * Blend an image into another one, using a color channel of a + * third image for the decision of blending from one to another. + * + * @param image1 Source 1 and result of blending + * @param image2 Source 2 of blending + * @param blendImage If the gray value of of pixel is 0, the result + * for this pixel is that of image1; for a gray value + * of 1, the pixel of image2 is used; for a value + * in between, a corresponding blending is used. + * @param channel The RBG channel to use for the blending decision. + */ + static TQImage& blend(TQImage &image1, TQImage &image2, + TQImage &blendImage, RGBComponent channel); + + /** + * Blend an image into another one, using alpha in the expected way. + * @param upper the "upper" image + * @param lower the "lower" image + * @param output the target image + * @author Rik Hemsley (rikkus) <rik@kde.org> + */ + static bool blend(const TQImage & upper, const TQImage & lower, TQImage & output); +// Not yet... static bool blend(const TQImage & image1, const TQImage & image2, TQImage & output, const TQRect & destRect); + + /** + * Blend an image into another one, using alpha in the expected way and + * over coordinates @p x and @p y with respect to the lower image. + * The output is a TQImage which is the @p upper image already blended + * with the @p lower one, so its size will be (in general) the same than + * @p upper instead of the same size than @p lower like the method above. + * In fact, the size of @p output is like upper's one only when it can be + * painted on lower, if there has to be some clipping, output's size will + * be the clipped area and x and y will be set to the correct up-left corner + * where the clipped rectangle begins. + * @param x x-coordinate of lower image + * @param y y-coordinate of lower image + * @param upper the "upper" image + * @param lower the "lower" image + * @param output the target image + */ + static bool blend(int &x, int &y, const TQImage & upper, const TQImage & lower, TQImage & output); + + /** + * Blend an image into another one, using alpha in the expected way and + * over coordinates @p x and @p y with respect to the lower image. + * The output is painted in the own @p lower image. This is an optimization + * of the blend method above provided by convenience. + * @param x x-coordinate of lower image + * @param y y-coordinate of lower image + * @param upper the "upper" image + * @param lower the "lower" image, which becomes the output image + */ + static bool blendOnLower(int x, int y, const TQImage & upper, const TQImage & lower); + + /** + * Blend part of an image into part of another, using the alpha channel in + * the expected way. + * Note that the destination rectangle will be correctly clipped. + * + * @param upper the "upper" image + * @param upperOffset Offset for the part of the upper image to be used. + * @param lower the "lower" image + * @param lowerRect Rectangle for the part of the lower image where the + * blending will occur. + * @since 3.2 + */ + static void blendOnLower(const TQImage &upper, const TQPoint &upperOffset, + TQImage &lower, const TQRect &lowerRect); + + /** + * Blend part of an image into part of another, using the opacity value + * and the alpha channel in the expected way. + * Note that the destination rectangle will be correctly clipped. + * + * @param upper the "upper" image + * @param upperOffset Offset for the part of the upper image to be used. + * @param lower the "lower" image + * @param lowerRect Rectangle for the part of the lower image where the + * blending will occur. + * @param opacity Opacity (between 0.0 and 1.0) which determines how much + * the source image will be blended into the destination image. + * @since 3.2 + */ + static void blendOnLower(const TQImage &upper, const TQPoint &upperOffset, + TQImage &lower, const TQRect &lowerRect, float opacity); + + /** + * Disposition of a source image on top of a destination image. + * @see KImageEffect::computeDestinationRect, KImageEffect::blendOnLower + * @since 3.2 + */ + enum Disposition { NoImage = 0, //!< Don't overlay + Centered, //!< Center top image on botton image + Tiled, //!< Tile top image on bottom image + CenterTiled, //!< Center and tile top image on bottom image + CenteredMaxpect, //!< Center and scale aspect + TiledMaxpect, //!< Tile and scale aspect + Scaled, //!< Scale + CenteredAutoFit //!< Center and scale or scale aspect + }; + + /** + * Compute the destination rectangle where to draw the upper image on top + * of another image using the given disposition. For tiled + * disposition, the rectangle should be duplicated on the whole area to + * obtained the wanted effect. + * + * @param lowerSize The size of the destination image. + * @param disposition The wanted disposition. + * @param upper The upper image. Note that this image may be scaled to + * adjust to the requested disposition. + * + * @return the computed rectangle. Its size may exceed @e lowerSize. + * @since 3.2 + */ + static TQRect computeDestinationRect(const TQSize &lowerSize, + Disposition disposition, TQImage &upper); + + /** + * Blend an image on top of another using a given disposition and a given + * opacity. The alpha channel of the upper image is used in the expected + * way. Beware the upper image may be modified. + * @since 3.2 + */ + static void blendOnLower(TQImage &upper, TQImage &lower, + Disposition disposition, float opacity); + + /** + * Modifies the intensity of a pixmap's RGB channel component. + * + * @param image The TQImage to process. + * @param percent Percent value. Use a negative value to dim. + * @param channel Which channel(s) should be modified + * @return The @p image, provided for convenience. + * @author Daniel M. Duley (mosfet) + */ + static TQImage& channelIntensity(TQImage &image, float percent, + RGBComponent channel); + + /** + * Fade an image to a certain background color. + * + * The number of colors will not be changed. + * + * @param image The TQImage to process. + * @param val The strength of the effect. 0 <= val <= 1. + * @param color The background color. + * @return Returns the image(), provided for convenience. + */ + static TQImage& fade(TQImage &image, float val, const TQColor &color); + + + /** + * This recolors a pixmap. The most dark color will become color a, + * the most bright one color b, and in between. + * + * @param image A TQImage to process. + * @param ca Color a + * @param cb Color b + * @param ncols The number of colors to dither the image to. + * Pass 0 to prevent dithering. + */ + static TQImage& flatten(TQImage &image, const TQColor &ca, + const TQColor &cb, int ncols=0); + + /** + * Build a hash on any given QImage + * + * @param image The TQImage to process + * @param lite The hash faces the indicated lighting (cardinal poles). + * @param spacing How many unmodified pixels in between hashes. + * @return Returns the image(), provided for convenience. + */ + static TQImage& hash(TQImage &image, Lighting lite=NorthLite, + unsigned int spacing=0); + + /** + * Either brighten or dim the image by a specified percent. + * For example, .50 will modify the colors by 50%. + * + * This function uses MMX instructions to process the image + * on processors that support it. + * + * @param image The TQImage to process. + * @param percent The percent value. Use a negative value to dim. + * @return Returns The image(), provided for convenience. + * @author Daniel M. Duley (mosfet) + * @author Benjamin Roe (ben@benroe.com) + */ + static TQImage& intensity(TQImage &image, float percent); + + /** + * Modulate the image with a color channel of another image. + * + * @param image The TQImage to modulate and result. + * @param modImage The TQImage to use for modulation. + * @param reverse Invert the meaning of image/modImage; result is image! + * @param type The modulation Type to use. + * @param factor The modulation amplitude; with 0 no effect [-200;200]. + * @param channel The RBG channel of image2 to use for modulation. + * @return Returns the image(), provided for convenience. + */ + static TQImage& modulate(TQImage &image, TQImage &modImage, bool reverse, + ModulationType type, int factor, RGBComponent channel); + + /** + * Convert an image to grayscale. + * + * @param image The TQImage to process. + * @param fast Set to @p true in order to use a faster but non-photographic + * quality algorithm. Appropriate for things such as toolbar icons. + * @return Returns the image(), provided for convenience. + * @author Daniel M. Duley (mosfet) + */ + static TQImage& toGray(TQImage &image, bool fast = false); + + /** + * Desaturate an image evenly. + * + * @param image The TQImage to process. + * @param desat A value between 0 and 1 setting the degree of desaturation + * @return Returns the image(), provided for convenience. + */ + static TQImage& desaturate(TQImage &image, float desat = 0.3); + + /** + * Fast, but low quality contrast of an image. Also see contrastHSV. + * + * @param image The TQImage to process. + * @param c A contrast value between -255 to 255. + * @return The image(), provided for convenience. + * @author Daniel M. Duley (mosfet) + * ### KDE 4: remove + */ + static TQImage& contrast(TQImage &image, int c); + + /** + * Dither an image using Floyd-Steinberg dithering for low-color + * situations. + * + * @param image The TQImage to process. + * @param palette The color palette to use + * @param size The size of the palette + * @return Returns the image(), provided for convenience. + */ + static TQImage& dither(TQImage &image, const TQColor *palette, int size); + + /** + * Calculate the image for a selected image, for instance a selected icon + * on the desktop. + * @param img the TQImage to select + * @param col the selected color, usually from TQColorGroup::highlight(). + */ + static TQImage& selectedImage( TQImage &img, const TQColor &col ); + + /** + * High quality, expensive HSV contrast. You can do a faster one by just + * taking a intensity threshold (ie: 128) and incrementing RGB color + * channels above it and decrementing those below it, but this gives much + * better results. + * + * @param img The TQImage to process. + * @param sharpen If true sharpness is increase, (spiffed). Otherwise + * it is decreased, (dulled). + * @author Daniel M. Duley (mosfet) + */ + static void contrastHSV(TQImage &img, bool sharpen=true); + + /** + * Normalises the pixel values to span the full range of color values. + * This is a contrast enhancement technique. + * @param img the image that is normalised + * @author Daniel M. Duley (mosfet) + */ + static void normalize(TQImage &img); + + /** + * Performs histogram equalisation on the reference + * image. + * @param img the image that is equalised + * @author Daniel M. Duley (mosfet) + */ + static void equalize(TQImage &img); + + /** + * Thresholds the reference image. You can also threshold images by using + * ThresholdDither in the various QPixmap/TQImage convert methods, but this + * lets you specify a threshold value. + * + * @param img The TQImage to process. + * @param value The threshold value. + * @author Daniel M. Duley (mosfet) + */ + static void threshold(TQImage &img, unsigned int value=128); + + /** + * Produces a 'solarization' effect seen when exposing a photographic + * film to light during the development process. + * + * @param img The TQImage to process. + * @param factor The extent of the solarization (0-99.9) + * @author Daniel M. Duley (mosfet) + */ + static void solarize(TQImage &img, double factor=50.0); + + /** + * Embosses the source image. This involves highlighting the edges + * and applying various other enhancements in order to get a metal + * effect. + * + * @param src The TQImage to process. + * @param radius The radius of the gaussian not counting the + * center pixel. Use 0 and a suitable radius will be automatically used. + * @param sigma The standard deviation of the gaussian. Use 1 if you're not + * sure. + * @return The embossed image. The original is not changed. + * @author Daniel M. Duley (mosfet) + */ + static TQImage emboss(TQImage &src, double radius, double sigma); + + /** + * Convenience method. + */ + static TQImage emboss(TQImage &src); + + /** + * Minimizes speckle noise in the source image using the 8 hull + * algorithm. + * + * @param src The TQImage to process. + * @return The despeckled image. The original is not changed. + * @author Daniel M. Duley (mosfet) + */ + static TQImage despeckle(TQImage &src); + + /** + * Produces a neat little "charcoal" effect. + * + * @param src The TQImage to process. + * @param radius The radius of the gaussian not counting the + * center pixel. Use 0 and a suitable radius will be automatically used. + * @param sigma The standard deviation of the gaussian. Use 1 if you're not + * sure. + * @return The charcoal image. The original is not changed. + * @author Daniel M. Duley (mosfet) + */ + static TQImage charcoal(TQImage &src, double radius, double sigma); + + /** + * This is provided for binary compatability only! Use the above method + * with a radius and sigma instead! + */ + static TQImage charcoal(TQImage &src, double factor=50.0); + + /** + * Rotates the image by the specified amount + * + * @param src The TQImage to process. + * @param r The rotate direction. + * @return The rotated image. The original is not changed. + * @author Daniel M. Duley (mosfet) + */ + static TQImage rotate(TQImage &src, RotateDirection r); + + /** + * Scales an image using simple pixel sampling. This does not produce + * nearly as nice a result as TQImage::smoothScale(), but has the + * advantage of being much faster - only a few milliseconds. + * + * @param src The TQImage to process. + * @param w The new width. + * @param h The new height. + * @return The scaled image. The original is not changed. + * @author Daniel M. Duley (mosfet) + */ + static TQImage sample(TQImage &src, int w, int h); + + /** + * Adds noise to an image. + * + * @param src The TQImage to process. + * @param type The algorithm used to generate the noise. + * @return The image with noise added. The original is not changed. + * @author Daniel M. Duley (mosfet) + */ + static TQImage addNoise(TQImage &src, NoiseType type = GaussianNoise); + + /** + * Blurs an image by convolving pixel neighborhoods. + * + * @param src The TQImage to process. + * @param radius The radius of the gaussian not counting the + * center pixel. Use 0 and a suitable radius will be automatically used. + * @param sigma The standard deviation of the gaussian. Use 1 if you're not + * sure. + * @return The blurred image. The original is not changed. + * @author Daniel M. Duley (mosfet) + */ + static TQImage blur(TQImage &src, double radius, double sigma); + + /** + * This is provided for binary compatability only! Use the above method + * with a radius and sigma instead! + */ + static TQImage blur(TQImage &src, double factor=50.0); + + /** + * Detects edges in an image using pixel neighborhoods and an edge + * detection mask. + * + * @param src The TQImage to process. + * @param radius The radius of the gaussian not counting the + * center pixel. Use 0 and a suitable radius will be automatically used. + * @return The image with edges detected. The original is not changed. + * @author Daniel M. Duley (mosfet) + */ + static TQImage edge(TQImage &src, double radius); + + /** + * Implodes an image by a specified percent. + * + * @param src The TQImage to process. + * @param factor The extent of the implosion. + * @param background An RGBA value to use for the background. After the + * effect some pixels may be "empty". This value is used for those pixels. + * @return The imploded image. The original is not changed. + * @author Daniel M. Duley (mosfet) + */ + static TQImage implode(TQImage &src, double factor=30.0, + unsigned int background = 0xFFFFFFFF); + + /** + * Produces an oil painting effect. + * + * @param src The TQImage to process. + * @param radius The radius of the gaussian not counting the + * center pixel. Use 0 and a suitable radius will be automatically used. + * @return The new image. The original is not changed. + * @author Daniel M. Duley (mosfet) + */ + static TQImage oilPaintConvolve(TQImage &src, double radius); + + /** + * This is provided for binary compatability only! Use the above method + * instead! + */ + static TQImage oilPaint(TQImage &src, int radius=3); + + /** + * Sharpens the pixels in the image using pixel neighborhoods. + * + * @param src The TQImage to process. + * @param radius The radius of the gaussian not counting the + * center pixel. Use 0 and a suitable radius will be automatically used. + * @param sigma The standard deviation of the gaussian. Use 1 if you're not + * sure. + * @return The sharpened image. The original is not changed. + * @author Daniel M. Duley (mosfet) + */ + static TQImage sharpen(TQImage &src, double radius, double sigma); + + /** + * This is provided for binary compatability only! Use the above method + * instead! + */ + static TQImage sharpen(TQImage &src, double factor=30.0); + + /** + * Randomly displaces pixels. + * + * @param src The TQImage to process. + * @param amount The vicinity for choosing a random pixel to swap. + * @return The image with pixels displaced. The original is not changed. + * @author Daniel M. Duley (mosfet) + */ + static TQImage spread(TQImage &src, unsigned int amount=3); + + /** + * Shades the image using a distance light source. + * + * @param src The TQImage to process. + * @param color_shading If true do color shading, otherwise do grayscale. + * @param azimuth Determines the light source and direction. + * @param elevation Determines the light source and direction. + * @return The shaded image. The original is not changed. + * @author Daniel M. Duley (mosfet) + */ + static TQImage shade(TQImage &src, bool color_shading=true, double azimuth=30.0, + double elevation=30.0); + /** + * Swirls the image by a specified amount + * + * @param src The TQImage to process. + * @param degrees The tightness of the swirl. + * @param background An RGBA value to use for the background. After the + * effect some pixels may be "empty". This value is used for those pixels. + * @return The swirled image. The original is not changed. + * @author Daniel M. Duley (mosfet) + */ + static TQImage swirl(TQImage &src, double degrees=50.0, unsigned int background = + 0xFFFFFFFF); + + /** + * Modifies the pixels along a sine wave. + * + * @param src The TQImage to process. + * @param amplitude The amplitude of the sine wave. + * @param frequency The frequency of the sine wave. + * @param background An RGBA value to use for the background. After the + * effect some pixels may be "empty". This value is used for those pixels. + * @return The new image. The original is not changed. + * @author Daniel M. Duley (mosfet) + */ + static TQImage wave(TQImage &src, double amplitude=25.0, double frequency=150.0, + unsigned int background = 0xFFFFFFFF); + + /** + * A bumpmapping algorithm. + * + * @param img the image you want bumpmap + * @param map the map used + * @param azimuth azimuth + * @param elevation elevation + * @param depth depth (not the depth of the image, but of the map) + * @param xofs X offset + * @param yofs Y offset + * @param waterlevel level that full transparency should represent + * @param ambient ambient lighting factor + * @param compensate compensate for darkening + * @param invert invert bumpmap + * @param type type of the bumpmap + * @param tiled tile the bumpmap over the image through the Y offset + * + * @return The destination image (dst) containing the result. + * @author Zack Rusin <zack@kde.org> + */ + static TQImage bumpmap(TQImage &img, TQImage &map, double azimuth, double elevation, + int depth, int xofs, int yofs, int waterlevel, + int ambient, bool compensate, bool invert, + BumpmapType type, bool tiled); + + /** + * Convert an image with standard alpha to premultiplied alpha + * + * @param img the image you want convert + * + * @return The destination image (dst) containing the result. + * @author Timothy Pearson <kb9vqf@pearsoncomputing.net> + */ + static TQImage convertToPremultipliedAlpha(TQImage input); + +private: + + /** + * Helper function to fast calc some altered (lighten, shaded) colors + * + */ + static unsigned int lHash(unsigned int c); + static unsigned int uHash(unsigned int c); + + /** + * Helper function to find the nearest color to the RBG triplet + */ + static int nearestColor( int r, int g, int b, const TQColor *pal, int size ); + + static void hull(const int x_offset, const int y_offset, const int polarity, + const int width, const int height, + unsigned int *f, unsigned int *g); + static unsigned int generateNoise(unsigned int pixel, NoiseType type); + static unsigned int interpolateColor(TQImage *image, double x, double y, + unsigned int background); + /* Various convolve routines */ + static int getOptimalKernelWidth(double radius, double sigma); + static bool convolveImage(TQImage *image, TQImage *dest, + const unsigned int order, + const double *kernel); + static void blurScanLine(double *kernel, int width, + unsigned int *src, unsigned int *dest, + int columns); + static int getBlurKernel(int width, double sigma, double **kernel); +}; + +#endif |