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440 lines
9.8 KiB
440 lines
9.8 KiB
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2015 Mario Luzeiro <mrluzeiro@gmail.com>
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* Copyright (C) 1992-2015 KiCad Developers, see AUTHORS.txt for contributors.
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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, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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/**
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* @file CImage.cpp
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* @brief one 8bit-channel image implementation
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*/
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#include "CImage.h"
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#include <wx/image.h> // Used for save an image to disk
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#include <string.h> // For memcpy
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#ifndef CLAMP
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#define CLAMP(n, min, max) {if (n < min) n=min; else if (n > max) n = max;}
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#endif
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CIMAGE::CIMAGE( unsigned int aXsize, unsigned int aYsize )
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{
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m_wxh = aXsize * aYsize;
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m_pixels = (unsigned char*)malloc( m_wxh );
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m_width = aXsize;
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m_height = aYsize;
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m_wraping = (E_WRAP)WRAP_CLAMP;
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}
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CIMAGE::~CIMAGE()
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{
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free( m_pixels );
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}
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unsigned char* CIMAGE::GetBuffer() const
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{
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return m_pixels;
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}
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bool CIMAGE::wrapCoords( int *aXo, int *aYo ) const
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{
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int x = *aXo;
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int y = *aYo;
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switch(m_wraping)
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{
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case WRAP_CLAMP:
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x = (x < 0 )?0:x;
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x = (x >= (int)(m_width - 1))?(m_width - 1):x;
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y = (y < 0)?0:y;
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y = (y >= (int)(m_height - 1))?(m_height - 1):y;
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break;
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case WRAP_WRAP:
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x = (x < 0)?((m_width - 1)+x):x;
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x = (x >= (int)(m_width - 1))?(x - m_width):x;
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y = (y < 0)?((m_height - 1)+y):y;
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y = (y >= (int)(m_height - 1))?(y - m_height):y;
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break;
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default:
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break;
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}
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if( (x < 0) || (x >= (int)m_width) ||
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(y < 0) || (y >= (int)m_height) )
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return false;
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*aXo = x;
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*aYo = y;
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return true;
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}
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void CIMAGE::Setpixel( int aX, int aY, unsigned char aValue )
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{
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if( wrapCoords( &aX, &aY ) )
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m_pixels[aX + aY * m_width] = aValue;
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}
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unsigned char CIMAGE::Getpixel( int aX, int aY ) const
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{
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if( wrapCoords( &aX, &aY ) )
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return m_pixels[aX + aY * m_width];
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else
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return 0;
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}
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void CIMAGE::Invert()
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{
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for( unsigned int it = 0; it < m_wxh; it++ )
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m_pixels[it] = 255 - m_pixels[it];
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}
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void CIMAGE::CopyFull( const CIMAGE *aImgA, const CIMAGE *aImgB, E_IMAGE_OP aOperation )
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{
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int aV, bV;
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if( aOperation == COPY_RAW )
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{
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if ( aImgA == NULL )
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return;
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}
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else
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{
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if ( (aImgA == NULL) || (aImgB == NULL) )
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return;
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}
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switch(aOperation)
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{
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case COPY_RAW:
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memcpy( m_pixels, aImgA->m_pixels, m_wxh );
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break;
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case COPY_ADD:
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for( unsigned int it = 0;it < m_wxh; it++ )
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{
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aV = aImgA->m_pixels[it];
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bV = aImgB->m_pixels[it];
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aV = (aV + bV);
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aV = (aV > 255)?255:aV;
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m_pixels[it] = aV;
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}
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break;
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case COPY_SUB:
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for( unsigned int it = 0;it < m_wxh; it++ )
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{
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aV = aImgA->m_pixels[it];
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bV = aImgB->m_pixels[it];
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aV = (aV - bV);
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aV = (aV < 0)?0:aV;
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m_pixels[it] = aV;
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}
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break;
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case COPY_DIF:
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for( unsigned int it = 0;it < m_wxh; it++ )
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{
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aV = aImgA->m_pixels[it];
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bV = aImgB->m_pixels[it];
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m_pixels[it] = abs(aV - bV);
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}
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break;
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case COPY_MUL:
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for( unsigned int it = 0;it < m_wxh; it++ )
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{
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aV = aImgA->m_pixels[it];
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bV = aImgB->m_pixels[it];
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m_pixels[it] = (unsigned char)((((float)aV / 255.0f) * ((float)bV / 255.0f)) * 255);
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}
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break;
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case COPY_AND:
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for( unsigned int it = 0;it < m_wxh; it++ )
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{
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m_pixels[it] = aImgA->m_pixels[it] & aImgB->m_pixels[it];
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}
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break;
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case COPY_OR:
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for( unsigned int it = 0;it < m_wxh; it++ )
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{
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m_pixels[it] = aImgA->m_pixels[it] | aImgB->m_pixels[it];
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}
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break;
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case COPY_XOR:
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for( unsigned int it = 0;it < m_wxh; it++ )
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{
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m_pixels[it] = aImgA->m_pixels[it] ^ aImgB->m_pixels[it];
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}
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break;
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case COPY_BLEND50:
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for( unsigned int it = 0;it < m_wxh; it++ )
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{
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aV = aImgA->m_pixels[it];
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bV = aImgB->m_pixels[it];
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m_pixels[it] = (aV + bV) / 2;
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}
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break;
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case COPY_MIN:
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for( unsigned int it = 0;it < m_wxh; it++ )
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{
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aV = aImgA->m_pixels[it];
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bV = aImgB->m_pixels[it];
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m_pixels[it] = (aV < bV)?aV:bV;
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}
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break;
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case COPY_MAX:
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for( unsigned int it = 0;it < m_wxh; it++ )
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{
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aV = aImgA->m_pixels[it];
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bV = aImgB->m_pixels[it];
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m_pixels[it] = (aV > bV)?aV:bV;
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}
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break;
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default:
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break;
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}
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}
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// TIP: If you want create or test filters you can use GIMP
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// with a generic convolution matrix and get the values from there.
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// http://docs.gimp.org/nl/plug-in-convmatrix.html
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static const S_FILTER FILTERS[] = {
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// Hi Pass
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{
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{ { 0, -1, -1, -1, 0},
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{-1, 2, -4, 2, -1},
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{-1, -4, 13, -4, -1},
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{-1, 2, -4, 2, -1},
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{ 0, -1, -1, -1, 0}
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},
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7,
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255
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},
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// Blur
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{
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{ { 3, 5, 7, 5, 3},
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{ 5, 9, 12, 9, 5},
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{ 7, 12, 20, 12, 7},
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{ 5, 9, 12, 9, 5},
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{ 3, 5, 7, 5, 3}
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},
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182,
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0
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},
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// Blur Invert
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{
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{ { 0, 0, 0, 0, 0},
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{ 0, 0, -1, 0, 0},
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{ 0, -1, 0, -1, 0},
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{ 0, 0, -1, 0, 0},
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{ 0, 0, 0, 0, 0}
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},
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4,
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255
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},
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//
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{
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{ { 0, 2, 4, 2, 0},
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{ 2, -2, 1, -2, 2},
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{ 4, 1, -8, 1, 4},
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{ 2, -2, 1, -2, 2},
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{ 0, 2, 4, 2, 0}
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},
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20,
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0
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},
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// Cartoon
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{
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{ {-1, -1, -1, -1, 0},
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{-1, 0, 0, 0, 0},
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{-1, 0, 4, 0, 0},
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{ 0, 0, 0, 1, 0},
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{ 0, 0, 0, 0, 4}
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},
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3,
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0
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},
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// Emboss
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{
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{ {-1, -1, -1, -1, 0},
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{-1, -1, -1, 0, 1},
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{-1, -1, 0, 1, 1},
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{-1, 0, 1, 1, 1},
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{ 0, 1, 1, 1, 1}
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},
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1,
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128
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},
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// Sharpen
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{
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{ {-1, -1, -1, -1, -1},
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{-1, 2, 2, 2, -1},
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{-1, 2, 8, 2, -1},
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{-1, 2, 2, 2, -1},
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{-1, -1, -1, -1, -1}
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},
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8,
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0
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},
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// Melt
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{
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{ { 4, 2, 6, 8, 1},
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{ 1, 2, 5, 4, 2},
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{ 0, -1, 1, -1, 0},
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{ 0, 0, -2, 0, 0},
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{ 0, 0, 0, 0, 0}
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},
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32,
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0
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},
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// Sobel Gx
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{
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{ { 0, 0, 0, 0, 0},
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{ 0, -1, 0, 1, 0},
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{ 0, -2, 0, 2, 0},
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{ 0, -1, 0, 1, 0},
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{ 0, 0, 0, 0, 0}
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},
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1,
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0
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},
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// Sobel Gy
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{
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{ { 1, 2, 4, 2, 1},
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{-1, -1, 0, 1, 1},
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{-2, -2, 0, 2, 2},
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{-1, -1, 0, 1, 1},
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{-1, -2, -4, -2, -1},
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},
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1,
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0
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}
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};// Filters
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//!TODO: This functions can be optimized slipting it between the edges and
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// do it without use the getpixel function.
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// Optimization can be done to m_pixels[ix + iy * m_width]
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// but keep in mind the parallel process of the algorithm
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void CIMAGE::EfxFilter( CIMAGE *aInImg, E_FILTER aFilterType )
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{
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S_FILTER filter = FILTERS[aFilterType];
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aInImg->m_wraping = WRAP_CLAMP;
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m_wraping = WRAP_CLAMP;
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#ifdef USE_OPENMP
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#pragma omp parallel for
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#endif /* USE_OPENMP */
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for( int iy = 0; iy < (int)m_height; iy++)
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{
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for( int ix = 0; ix < (int)m_width; ix++ )
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{
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int v = 0;
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for( int sy = 0; sy < 5; sy++ )
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{
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for( int sx = 0; sx < 5; sx++ )
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{
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int factor = filter.kernel[sx][sy];
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unsigned char pixelv = aInImg->Getpixel( ix + sx - 2, iy + sy - 2 );
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v += pixelv * factor;
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}
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}
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v /= filter.div;
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v += filter.offset;
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CLAMP(v, 0, 255);
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m_pixels[ix + iy * m_width] = v;
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}
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}
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}
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void CIMAGE::SetPixelsFromNormalizedFloat( const float * aNormalizedFloatArray )
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{
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for( unsigned int i = 0; i < m_wxh; i++ )
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{
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int v = aNormalizedFloatArray[i] * 255;
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CLAMP(v, 0, 255);
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m_pixels[i] = v;
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}
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}
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void CIMAGE::SaveAsPNG( wxString aFileName ) const
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{
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unsigned char* pixelbuffer = (unsigned char*) malloc( m_wxh * 3 );
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wxImage image( m_width, m_height );
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for( unsigned int i = 0; i < m_wxh; i++)
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{
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unsigned char v = m_pixels[i];
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// Set RGB value with all same values intensities
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pixelbuffer[i * 3 + 0] = v;
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pixelbuffer[i * 3 + 1] = v;
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pixelbuffer[i * 3 + 2] = v;
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}
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image.SetData( pixelbuffer );
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image = image.Mirror( false );
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image.SaveFile( aFileName + ".png", wxBITMAP_TYPE_PNG );
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image.Destroy();
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}
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