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/*
* Copyright (c) 2005 Cyrille Berger <cberger@cberger.net>
*
* This program 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 program 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 program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef KIS_CONVOLUTION_PAINTER_H_
#define KIS_CONVOLUTION_PAINTER_H_
#include <tqimage.h>
#include "ksharedptr.h"
#include "kis_types.h"
#include "kis_painter.h"
#include "koffice_export.h"
enum KisConvolutionBorderOp {
BORDER_DEFAULT_FILL = 0, // Use the default pixel to make up for the missing pixels on the border or the pixel that lies beyond
// the rect we are convolving.
BORDER_WRAP = 1, // Use the pixel on the opposite side to make up for the missing pixels on the border. XXX: Not implemented yet
BORDER_REPEAT = 2, // Use the border for the missing pixels, too.
BORDER_AVOID = 3 // Skip convolving the border pixels at all.
};
class KisKernel;
typedef TDESharedPtr<KisKernel> KisKernelSP;
class KisKernel : public TDEShared
{
public:
TQ_UINT32 width;
TQ_UINT32 height;
TQ_INT32 offset;
TQ_INT32 factor;
TQ_INT32 * data;
KisKernel() : width(0), height(0), offset(0), factor(0), data(0) {};
virtual ~KisKernel() { delete [] data; };
static KisKernelSP fromTQImage(const TQImage& img);
};
class KRITACORE_EXPORT KisConvolutionPainter : public KisPainter
{
typedef KisPainter super;
public:
KisConvolutionPainter();
KisConvolutionPainter(KisPaintDeviceSP device);
/**
* Convolve all channels in src using the specified kernel; there is only one kernel for all
* channels possible. By default the the border pixels are not convolved, that is, convolving
* starts with at (x + kernel.width/2, y + kernel.height/2) and stops at w - (kernel.width/2)
* and h - (kernel.height/2)
*
* The border op decides what to do with pixels too close to the edge of the rect as defined above.
*
* The channels flag determines which set out of color channels, alpha channels, substance or substrate
* channels we convolve.
*
* Note that we do not (currently) support different kernels for different channels _or_ channel types.
*/
void applyMatrix(KisKernelSP kernel, TQ_INT32 x, TQ_INT32 y, TQ_INT32 w, TQ_INT32 h,
KisConvolutionBorderOp borderOp = BORDER_AVOID,
KisChannelInfo::enumChannelFlags channelFlags = KisChannelInfo::FLAG_COLOR);
private:
/**
* This function is called by applyMatrix when borderOp == BORDER_REPEAT
*/
void applyMatrixRepeat(KisKernelSP kernel, TQ_INT32 x, TQ_INT32 y, TQ_INT32 w, TQ_INT32 h,
KisChannelInfo::enumChannelFlags channelFlags);
};
#endif //KIS_CONVOLUTION_PAINTER_H_
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