132 lines
3.4 KiB
C++
132 lines
3.4 KiB
C++
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright (c) 2007 The Zdeno Ash Miklas
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*
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* This source file is part of VideoTexture library
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*
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* Contributor(s):
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file ImageMix.h
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* \ingroup bgevideotex
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*/
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#ifndef __IMAGEMIX_H__
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#define __IMAGEMIX_H__
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#include "Common.h"
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#include "ImageBase.h"
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#include "FilterBase.h"
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/// class for source mixing
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class ImageSourceMix : public ImageSource
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{
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public:
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/// constructor
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ImageSourceMix (const char *id) : ImageSource(id), m_offset(0), m_weight(0x100) {}
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/// destructor
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virtual ~ImageSourceMix (void) {}
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/// get offset
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long long getOffset (void) { return m_offset; }
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/// set offset
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void setOffset (unsigned int * firstImg) { m_offset = m_image - firstImg; }
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/// get weight
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short getWeight (void) { return m_weight; }
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/// set weight
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void setWeight (short weight) { m_weight = weight; }
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protected:
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/// buffer offset to the first source buffer
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long long m_offset;
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/// source weight
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short m_weight;
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};
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/// class for image mixer
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class ImageMix : public ImageBase
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{
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public:
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/// constructor
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ImageMix (void) : ImageBase(false) {}
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/// destructor
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virtual ~ImageMix (void) {}
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/// get weight
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short getWeight(const char *id);
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/// set weight
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bool setWeight(const char *id, short weight);
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protected:
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/// create new source
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virtual ImageSource *newSource(const char *id) { return new ImageSourceMix(id); }
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/// calculate image from sources and set its availability
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virtual void calcImage (unsigned int texId, double ts);
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};
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/// pixel filter for image mixer
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class FilterImageMix : public FilterBase
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{
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public:
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/// constructor
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FilterImageMix (ImageSourceList & sources) : m_sources(sources) {}
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/// destructor
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virtual ~FilterImageMix (void) {}
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protected:
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/// source list
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ImageSourceList & m_sources;
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/// filter pixel, source int buffer
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virtual unsigned int filter (unsigned int * src, short x, short y,
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short * size, unsigned int pixSize, unsigned int val = 0)
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{
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// resulting pixel color
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int color[] = {0, 0, 0, 0};
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// iterate sources
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for (ImageSourceList::iterator it = m_sources.begin(); it != m_sources.end(); ++it)
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{
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// get pointer to mixer source
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ImageSourceMix * mixSrc = static_cast<ImageSourceMix*>(*it);
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// add weighted source pixel to result
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color[0] += mixSrc->getWeight() * (src[mixSrc->getOffset()] & 0xFF);
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color[1] += mixSrc->getWeight() * ((src[mixSrc->getOffset()] >> 8) & 0xFF);
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color[2] += mixSrc->getWeight() * ((src[mixSrc->getOffset()] >> 16) & 0xFF);
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color[3] += mixSrc->getWeight() * ((src[mixSrc->getOffset()] >> 24) & 0xFF);
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}
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// return resulting color
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return ((color[0] >> 8) & 0xFF) | (color[1] & 0xFF00)
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| ((color[2] << 8) & 0xFF0000) | ((color[3] << 16) & 0xFF000000);
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}
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};
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#endif
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