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3810 lines (3430 loc) · 114 KB
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// xImaDsp.cpp : DSP functions
/* 07/08/2001 v1.00 - Davide Pizzolato - www.xdp.it
* CxImage version 7.0.1 07/Jan/2011
*/
#include "CxImage.h"
#include "CImageIterator.h"
//#include "Types.h"
#include "CxDefines.h"
#ifndef __MINGW32__
# include <queue>
#endif
#if CXIMAGE_SUPPORT_DSP
namespace CppImage
{
////////////////////////////////////////////////////////////////////////////////
/**
* Converts the image to B&W.
* The OptimalThreshold() function can be used for calculating the optimal threshold.
* \param level: the lightness threshold.
* \return true if everything is ok
*/
bool CxImage::Threshold(uint8_t level)
{
if (!pDib)
return false;
if (head.biBitCount == 1)
return true;
GrayScale();
CxImage tmp(head.biWidth, head.biHeight, 1);
if (!tmp.IsValid())
{
strcpy(info.szLastError,tmp.GetLastError());
return false;
}
for (int32_t y=0;y<head.biHeight;y++)
{
info.nProgress = (int32_t)(100*y/head.biHeight);
if (info.nEscape)
break;
for (int32_t x=0;x<head.biWidth;x++)
{
if (BlindGetPixelIndex(x,y)>level)
tmp.BlindSetPixelIndex(x,y,1);
else
tmp.BlindSetPixelIndex(x,y,0);
}
}
tmp.SetPaletteColor(0,0,0,0);
tmp.SetPaletteColor(1,255,255,255);
Transfer(tmp);
return true;
}
////////////////////////////////////////////////////////////////////////////////
/**
* Converts the image to B&W, using a threshold mask
* \param pThresholdMask: the lightness threshold mask.
* the pThresholdMask image must be grayscale with same with and height of the current image
* \return true if everything is ok
*/
bool CxImage::Threshold(CxImage* pThresholdMask)
{
if (!pDib)
return false;
if (head.biBitCount == 1)
return true;
if (!pThresholdMask)
return false;
if (!pThresholdMask->IsValid() ||
!pThresholdMask->IsGrayScale() ||
pThresholdMask->GetWidth() != GetWidth() ||
pThresholdMask->GetHeight() != GetHeight())
{
strcpy(info.szLastError,"invalid ThresholdMask");
return false;
}
GrayScale();
CxImage tmp(head.biWidth,head.biHeight,1);
if (!tmp.IsValid())
{
strcpy(info.szLastError,tmp.GetLastError());
return false;
}
for (int32_t y=0;y<head.biHeight;y++)
{
info.nProgress = (int32_t)(100*y/head.biHeight);
if (info.nEscape) break;
for (int32_t x=0;x<head.biWidth;x++)
{
if (BlindGetPixelIndex(x,y)>pThresholdMask->BlindGetPixelIndex(x,y))
tmp.BlindSetPixelIndex(x,y,1);
else
tmp.BlindSetPixelIndex(x,y,0);
}
}
tmp.SetPaletteColor(0,0,0,0);
tmp.SetPaletteColor(1,255,255,255);
Transfer(tmp);
return true;
}
////////////////////////////////////////////////////////////////////////////////
/**
* Filters only the pixels with a lightness less (or more) than the threshold level,
* and preserves the colors for the unfiltered pixels.
* \param level = the lightness threshold.
* \param bDirection = false: filter dark pixels, true: filter light pixels
* \param nBkgndColor = filtered pixels are set to nBkgndColor color
* \param bSetAlpha = if true, sets also the alpha component for the filtered pixels, with nBkgndColor.rgbReserved
* \return true if everything is ok
* \author [DP], [wangsongtao]
*/
////////////////////////////////////////////////////////////////////////////////
bool CxImage::Threshold2(uint8_t level, bool bDirection, RGBQuad nBkgndColor, bool bSetAlpha)
{
if (!pDib) return false;
if (head.biBitCount == 1) return true;
CxImage tmp(*this, true, false, false);
if (!tmp.IsValid()){
strcpy(info.szLastError,tmp.GetLastError());
return false;
}
tmp.GrayScale();
int32_t xmin,xmax,ymin,ymax;
if (pSelection){
xmin = info.rSelectionBox.left; xmax = info.rSelectionBox.right;
ymin = info.rSelectionBox.bottom; ymax = info.rSelectionBox.top;
} else {
xmin = ymin = 0;
xmax = head.biWidth; ymax=head.biHeight;
}
for(int32_t y=ymin; y<ymax; y++){
info.nProgress = (int32_t)(100*y/head.biHeight);
if (info.nEscape) break;
for(int32_t x=xmin; x<xmax; x++){
#if CXIMAGE_SUPPORT_SELECTION
if (BlindSelectionIsInside(x,y))
#endif //CXIMAGE_SUPPORT_SELECTION
{
uint8_t i = tmp.BlindGetPixelIndex(x,y);
if (!bDirection && i<level) BlindSetPixelColor(x,y,nBkgndColor,bSetAlpha);
if (bDirection && i>=level) BlindSetPixelColor(x,y,nBkgndColor,bSetAlpha);
}
}
}
return true;
}
////////////////////////////////////////////////////////////////////////////////
/**
* Extract RGB channels from the image. Each channel is an 8 bit grayscale image.
* \param r,g,b: pointers to CxImage objects, to store the splited channels
* \return true if everything is ok
*/
bool CxImage::SplitRGB(CxImage* r,CxImage* g,CxImage* b)
{
if (!pDib) return false;
if (r==NULL && g==NULL && b==NULL) return false;
CxImage tmpr(head.biWidth,head.biHeight,8);
CxImage tmpg(head.biWidth,head.biHeight,8);
CxImage tmpb(head.biWidth,head.biHeight,8);
RGBQuad color;
for(int32_t y=0; y<head.biHeight; y++){
for(int32_t x=0; x<head.biWidth; x++){
color = BlindGetPixelColor(x,y);
if (r) tmpr.BlindSetPixelIndex(x,y,color.rgbRed);
if (g) tmpg.BlindSetPixelIndex(x,y,color.rgbGreen);
if (b) tmpb.BlindSetPixelIndex(x,y,color.rgbBlue);
}
}
if (r) tmpr.SetGrayPalette();
if (g) tmpg.SetGrayPalette();
if (b) tmpb.SetGrayPalette();
/*for(int32_t j=0; j<256; j++){
uint8_t i=(uint8_t)j;
if (r) tmpr.SetPaletteColor(i,i,0,0);
if (g) tmpg.SetPaletteColor(i,0,i,0);
if (b) tmpb.SetPaletteColor(i,0,0,i);
}*/
if (r) r->Transfer(tmpr);
if (g) g->Transfer(tmpg);
if (b) b->Transfer(tmpb);
return true;
}
////////////////////////////////////////////////////////////////////////////////
/**
* Extract CMYK channels from the image. Each channel is an 8 bit grayscale image.
* \param c,m,y,k: pointers to CxImage objects, to store the splited channels
* \return true if everything is ok
*/
bool CxImage::SplitCMYK(CxImage* c,CxImage* m,CxImage* y,CxImage* k)
{
if (!pDib) return false;
if (c==NULL && m==NULL && y==NULL && k==NULL) return false;
CxImage tmpc(head.biWidth, head.biHeight, 8);
CxImage tmpm(head.biWidth, head.biHeight, 8);
CxImage tmpy(head.biWidth, head.biHeight, 8);
CxImage tmpk(head.biWidth, head.biHeight, 8);
RGBQuad color;
for(int32_t yy=0; yy<head.biHeight; yy++){
for(int32_t xx=0; xx<head.biWidth; xx++){
color = BlindGetPixelColor(xx,yy);
if (c) tmpc.BlindSetPixelIndex(xx,yy,(uint8_t)(255-color.rgbRed));
if (m) tmpm.BlindSetPixelIndex(xx,yy,(uint8_t)(255-color.rgbGreen));
if (y) tmpy.BlindSetPixelIndex(xx,yy,(uint8_t)(255-color.rgbBlue));
if (k) tmpk.BlindSetPixelIndex(xx,yy,(uint8_t)RGB2GRAY(color.rgbRed,color.rgbGreen,color.rgbBlue));
}
}
if (c) tmpc.SetGrayPalette();
if (m) tmpm.SetGrayPalette();
if (y) tmpy.SetGrayPalette();
if (k) tmpk.SetGrayPalette();
if (c) c->Transfer(tmpc);
if (m) m->Transfer(tmpm);
if (y) y->Transfer(tmpy);
if (k) k->Transfer(tmpk);
return true;
}
////////////////////////////////////////////////////////////////////////////////
/**
* Extract YUV channels from the image. Each channel is an 8 bit grayscale image.
* \param y,u,v: pointers to CxImage objects, to store the splited channels
* \return true if everything is ok
*/
bool CxImage::SplitYUV(CxImage* y,CxImage* u,CxImage* v)
{
if (!pDib) return false;
if (y==NULL && u==NULL && v==NULL) return false;
CxImage tmpy(head.biWidth, head.biHeight, 8);
CxImage tmpu(head.biWidth, head.biHeight, 8);
CxImage tmpv(head.biWidth, head.biHeight, 8);
RGBQuad color;
for(int32_t yy=0; yy<head.biHeight; yy++){
for(int32_t x=0; x<head.biWidth; x++){
color = RGBtoYUV(BlindGetPixelColor(x,yy));
if (y) tmpy.BlindSetPixelIndex(x,yy,color.rgbRed);
if (u) tmpu.BlindSetPixelIndex(x,yy,color.rgbGreen);
if (v) tmpv.BlindSetPixelIndex(x,yy,color.rgbBlue);
}
}
if (y) tmpy.SetGrayPalette();
if (u) tmpu.SetGrayPalette();
if (v) tmpv.SetGrayPalette();
if (y) y->Transfer(tmpy);
if (u) u->Transfer(tmpu);
if (v) v->Transfer(tmpv);
return true;
}
////////////////////////////////////////////////////////////////////////////////
/**
* Extract YIQ channels from the image. Each channel is an 8 bit grayscale image.
* \param y,i,q: pointers to CxImage objects, to store the splited channels
* \return true if everything is ok
*/
bool CxImage::SplitYIQ(CxImage* y,CxImage* i,CxImage* q)
{
if (!pDib) return false;
if (y==NULL && i==NULL && q==NULL) return false;
CxImage tmpy(head.biWidth,head.biHeight,8);
CxImage tmpi(head.biWidth,head.biHeight,8);
CxImage tmpq(head.biWidth,head.biHeight,8);
RGBQuad color;
for(int32_t yy=0; yy<head.biHeight; yy++){
for(int32_t x=0; x<head.biWidth; x++){
color = RGBtoYIQ(BlindGetPixelColor(x,yy));
if (y) tmpy.BlindSetPixelIndex(x,yy,color.rgbRed);
if (i) tmpi.BlindSetPixelIndex(x,yy,color.rgbGreen);
if (q) tmpq.BlindSetPixelIndex(x,yy,color.rgbBlue);
}
}
if (y) tmpy.SetGrayPalette();
if (i) tmpi.SetGrayPalette();
if (q) tmpq.SetGrayPalette();
if (y) y->Transfer(tmpy);
if (i) i->Transfer(tmpi);
if (q) q->Transfer(tmpq);
return true;
}
////////////////////////////////////////////////////////////////////////////////
/**
* Extract XYZ channels from the image. Each channel is an 8 bit grayscale image.
* \param x,y,z: pointers to CxImage objects, to store the splited channels
* \return true if everything is ok
*/
bool CxImage::SplitXYZ(CxImage* x,CxImage* y,CxImage* z)
{
if (!pDib) return false;
if (x==NULL && y==NULL && z==NULL) return false;
CxImage tmpx(head.biWidth,head.biHeight,8);
CxImage tmpy(head.biWidth,head.biHeight,8);
CxImage tmpz(head.biWidth,head.biHeight,8);
RGBQuad color;
for(int32_t yy=0; yy<head.biHeight; yy++){
for(int32_t xx=0; xx<head.biWidth; xx++){
color = RGBtoXYZ(BlindGetPixelColor(xx,yy));
if (x) tmpx.BlindSetPixelIndex(xx,yy,color.rgbRed);
if (y) tmpy.BlindSetPixelIndex(xx,yy,color.rgbGreen);
if (z) tmpz.BlindSetPixelIndex(xx,yy,color.rgbBlue);
}
}
if (x) tmpx.SetGrayPalette();
if (y) tmpy.SetGrayPalette();
if (z) tmpz.SetGrayPalette();
if (x) x->Transfer(tmpx);
if (y) y->Transfer(tmpy);
if (z) z->Transfer(tmpz);
return true;
}
////////////////////////////////////////////////////////////////////////////////
/**
* Extract HSL channels from the image. Each channel is an 8 bit grayscale image.
* \param h,s,l: pointers to CxImage objects, to store the splited channels
* \return true if everything is ok
*/
bool CxImage::SplitHSL(CxImage* h,CxImage* s,CxImage* l)
{
if (!pDib) return false;
if (h==NULL && s==NULL && l==NULL) return false;
CxImage tmph(head.biWidth,head.biHeight,8);
CxImage tmps(head.biWidth,head.biHeight,8);
CxImage tmpl(head.biWidth,head.biHeight,8);
RGBQuad color;
for(int32_t y=0; y<head.biHeight; y++){
for(int32_t x=0; x<head.biWidth; x++){
color = RGBtoHSL(BlindGetPixelColor(x,y));
if (h) tmph.BlindSetPixelIndex(x,y,color.rgbRed);
if (s) tmps.BlindSetPixelIndex(x,y,color.rgbGreen);
if (l) tmpl.BlindSetPixelIndex(x,y,color.rgbBlue);
}
}
if (h) tmph.SetGrayPalette();
if (s) tmps.SetGrayPalette();
if (l) tmpl.SetGrayPalette();
/* pseudo-color generator for hue channel (visual debug)
if (h) for(int32_t j=0; j<256; j++){
uint8_t i=(uint8_t)j;
RGBQuad hsl={120,240,i,0};
tmph.SetPaletteColor(i,HSLtoRGB(hsl));
}*/
if (h) h->Transfer(tmph);
if (s) s->Transfer(tmps);
if (l) l->Transfer(tmpl);
return true;
}
////////////////////////////////////////////////////////////////////////////////
#define HSLMAX 255 /* H,L, and S vary over 0-HSLMAX */
#define RGBMAX 255 /* R,G, and B vary over 0-RGBMAX */
/* HSLMAX BEST IF DIVISIBLE BY 6 */
/* RGBMAX, HSLMAX must each fit in a uint8_t. */
/* Hue is undefined if Saturation is 0 (grey-scale) */
/* This value determines where the Hue scrollbar is */
/* initially set for achromatic colors */
#define HSLUNDEFINED (HSLMAX*2/3)
////////////////////////////////////////////////////////////////////////////////
RGBQuad CxImage::RGBtoHSL(RGBQuad lRGBColor)
{
uint8_t R,G,B; /* input RGB values */
uint8_t H,L,S; /* output HSL values */
uint8_t cMax,cMin; /* max and min RGB values */
uint16_t Rdelta,Gdelta,Bdelta; /* intermediate value: % of spread from max*/
R = lRGBColor.rgbRed; /* get R, G, and B out of uint32_t */
G = lRGBColor.rgbGreen;
B = lRGBColor.rgbBlue;
cMax = max( max(R,G), B); /* calculate lightness */
cMin = min( min(R,G), B);
L = (uint8_t)((((cMax+cMin)*HSLMAX)+RGBMAX)/(2*RGBMAX));
if (cMax==cMin){ /* r=g=b --> achromatic case */
S = 0; /* saturation */
H = HSLUNDEFINED; /* hue */
} else { /* chromatic case */
if (L <= (HSLMAX/2)) /* saturation */
S = (uint8_t)((((cMax-cMin)*HSLMAX)+((cMax+cMin)/2))/(cMax+cMin));
else
S = (uint8_t)((((cMax-cMin)*HSLMAX)+((2*RGBMAX-cMax-cMin)/2))/(2*RGBMAX-cMax-cMin));
/* hue */
Rdelta = (uint16_t)((((cMax-R)*(HSLMAX/6)) + ((cMax-cMin)/2) ) / (cMax-cMin));
Gdelta = (uint16_t)((((cMax-G)*(HSLMAX/6)) + ((cMax-cMin)/2) ) / (cMax-cMin));
Bdelta = (uint16_t)((((cMax-B)*(HSLMAX/6)) + ((cMax-cMin)/2) ) / (cMax-cMin));
if (R == cMax)
H = (uint8_t)(Bdelta - Gdelta);
else if (G == cMax)
H = (uint8_t)((HSLMAX/3) + Rdelta - Bdelta);
else /* B == cMax */
H = (uint8_t)(((2*HSLMAX)/3) + Gdelta - Rdelta);
// if (H < 0) H += HSLMAX; //always false
if (H > HSLMAX) H -= HSLMAX;
}
RGBQuad hsl={L,S,H,0};
return hsl;
}
////////////////////////////////////////////////////////////////////////////////
float CxImage::HueToRGB(float n1,float n2, float hue)
{
//<F. Livraghi> fixed implementation for HSL2RGB routine
float rValue;
if (hue > 360)
hue = hue - 360;
else if (hue < 0)
hue = hue + 360;
if (hue < 60)
rValue = n1 + (n2-n1)*hue/60.0f;
else if (hue < 180)
rValue = n2;
else if (hue < 240)
rValue = n1+(n2-n1)*(240-hue)/60;
else
rValue = n1;
return rValue;
}
////////////////////////////////////////////////////////////////////////////////
RGBQuad CxImage::HSLtoRGB(ColorRef cHSLColor)
{
return HSLtoRGB(RGBtoRGBQUAD(cHSLColor));
}
////////////////////////////////////////////////////////////////////////////////
RGBQuad CxImage::HSLtoRGB(RGBQuad lHSLColor)
{
//<F. Livraghi> fixed implementation for HSL2RGB routine
float h,s,l;
float m1,m2;
uint8_t r,g,b;
h = (float)lHSLColor.rgbRed * 360.0f/255.0f;
s = (float)lHSLColor.rgbGreen/255.0f;
l = (float)lHSLColor.rgbBlue/255.0f;
if (l <= 0.5) m2 = l * (1+s);
else m2 = l + s - l*s;
m1 = 2 * l - m2;
if (s == 0) {
r=g=b=(uint8_t)(l*255.0f);
} else {
r = (uint8_t)(HueToRGB(m1,m2,h+120) * 255.0f);
g = (uint8_t)(HueToRGB(m1,m2,h) * 255.0f);
b = (uint8_t)(HueToRGB(m1,m2,h-120) * 255.0f);
}
RGBQuad rgb = {b,g,r,0};
return rgb;
}
////////////////////////////////////////////////////////////////////////////////
RGBQuad CxImage::YUVtoRGB(RGBQuad lYUVColor)
{
int32_t U,V,R,G,B;
float Y = lYUVColor.rgbRed;
U = lYUVColor.rgbGreen - 128;
V = lYUVColor.rgbBlue - 128;
// R = (int32_t)(1.164 * Y + 2.018 * U);
// G = (int32_t)(1.164 * Y - 0.813 * V - 0.391 * U);
// B = (int32_t)(1.164 * Y + 1.596 * V);
R = (int32_t)( Y + 1.403f * V);
G = (int32_t)( Y - 0.344f * U - 0.714f * V);
B = (int32_t)( Y + 1.770f * U);
R= min(255,max(0,R));
G= min(255,max(0,G));
B= min(255,max(0,B));
RGBQuad rgb={(uint8_t)B,(uint8_t)G,(uint8_t)R,0};
return rgb;
}
////////////////////////////////////////////////////////////////////////////////
RGBQuad CxImage::RGBtoYUV(RGBQuad lRGBColor)
{
int32_t Y,U,V,R,G,B;
R = lRGBColor.rgbRed;
G = lRGBColor.rgbGreen;
B = lRGBColor.rgbBlue;
// Y = (int32_t)( 0.257 * R + 0.504 * G + 0.098 * B);
// U = (int32_t)( 0.439 * R - 0.368 * G - 0.071 * B + 128);
// V = (int32_t)(-0.148 * R - 0.291 * G + 0.439 * B + 128);
Y = (int32_t)(0.299f * R + 0.587f * G + 0.114f * B);
U = (int32_t)((B-Y) * 0.565f + 128);
V = (int32_t)((R-Y) * 0.713f + 128);
Y= min(255,max(0,Y));
U= min(255,max(0,U));
V= min(255,max(0,V));
RGBQuad yuv={(uint8_t)V,(uint8_t)U,(uint8_t)Y,0};
return yuv;
}
////////////////////////////////////////////////////////////////////////////////
RGBQuad CxImage::YIQtoRGB(RGBQuad lYIQColor)
{
int32_t I,Q,R,G,B;
float Y = lYIQColor.rgbRed;
I = lYIQColor.rgbGreen - 128;
Q = lYIQColor.rgbBlue - 128;
R = (int32_t)( Y + 0.956f * I + 0.621f * Q);
G = (int32_t)( Y - 0.273f * I - 0.647f * Q);
B = (int32_t)( Y - 1.104f * I + 1.701f * Q);
R= min(255,max(0,R));
G= min(255,max(0,G));
B= min(255,max(0,B));
RGBQuad rgb={(uint8_t)B,(uint8_t)G,(uint8_t)R,0};
return rgb;
}
////////////////////////////////////////////////////////////////////////////////
RGBQuad CxImage::RGBtoYIQ(RGBQuad lRGBColor)
{
int32_t Y,I,Q,R,G,B;
R = lRGBColor.rgbRed;
G = lRGBColor.rgbGreen;
B = lRGBColor.rgbBlue;
Y = (int32_t)( 0.2992f * R + 0.5868f * G + 0.1140f * B);
I = (int32_t)( 0.5960f * R - 0.2742f * G - 0.3219f * B + 128);
Q = (int32_t)( 0.2109f * R - 0.5229f * G + 0.3120f * B + 128);
Y= min(255,max(0,Y));
I= min(255,max(0,I));
Q= min(255,max(0,Q));
RGBQuad yiq={(uint8_t)Q,(uint8_t)I,(uint8_t)Y,0};
return yiq;
}
////////////////////////////////////////////////////////////////////////////////
RGBQuad CxImage::XYZtoRGB(RGBQuad lXYZColor)
{
int32_t X,Y,Z,R,G,B;
X = lXYZColor.rgbRed;
Y = lXYZColor.rgbGreen;
Z = lXYZColor.rgbBlue;
double k=1.088751;
R = (int32_t)( 3.240479f * X - 1.537150f * Y - 0.498535f * Z * k);
G = (int32_t)( -0.969256f * X + 1.875992f * Y + 0.041556f * Z * k);
B = (int32_t)( 0.055648f * X - 0.204043f * Y + 1.057311f * Z * k);
R= min(255,max(0,R));
G= min(255,max(0,G));
B= min(255,max(0,B));
RGBQuad rgb={(uint8_t)B,(uint8_t)G,(uint8_t)R,0};
return rgb;
}
////////////////////////////////////////////////////////////////////////////////
RGBQuad CxImage::RGBtoXYZ(RGBQuad lRGBColor)
{
int32_t X,Y,Z,R,G,B;
R = lRGBColor.rgbRed;
G = lRGBColor.rgbGreen;
B = lRGBColor.rgbBlue;
X = (int32_t)( 0.412453f * R + 0.357580f * G + 0.180423f * B);
Y = (int32_t)( 0.212671f * R + 0.715160f * G + 0.072169f * B);
Z = (int32_t)((0.019334f * R + 0.119193f * G + 0.950227f * B)*0.918483657f);
//X= min(255,max(0,X));
//Y= min(255,max(0,Y));
//Z= min(255,max(0,Z));
RGBQuad xyz={(uint8_t)Z,(uint8_t)Y,(uint8_t)X,0};
return xyz;
}
////////////////////////////////////////////////////////////////////////////////
/**
* Generates a "rainbow" palette with saturated colors
* \param correction: 1 generates a single hue spectrum. 0.75 is nice for scientific applications.
*/
void CxImage::HuePalette(float correction)
{
if (head.biClrUsed==0) return;
for(uint32_t j=0; j<head.biClrUsed; j++){
uint8_t i=(uint8_t)(j*correction*(255/(head.biClrUsed-1)));
RGBQuad hsl={120,240,i,0};
SetPaletteColor((uint8_t)j,HSLtoRGB(hsl));
}
}
////////////////////////////////////////////////////////////////////////////////
/**
* Replaces the original hue and saturation values.
* \param hue: hue
* \param sat: saturation
* \param blend: can be from 0 (no effect) to 1 (full effect)
* \return true if everything is ok
*/
bool CxImage::Colorize(uint8_t hue, uint8_t sat, float blend)
{
if (!pDib) return false;
if (blend < 0.0f) blend = 0.0f;
if (blend > 1.0f) blend = 1.0f;
int32_t a0 = (int32_t)(256*blend);
int32_t a1 = 256 - a0;
bool bFullBlend = false;
if (blend > 0.999f) bFullBlend = true;
RGBQuad color,hsl;
if (head.biClrUsed==0){
int32_t xmin,xmax,ymin,ymax;
if (pSelection){
xmin = info.rSelectionBox.left; xmax = info.rSelectionBox.right;
ymin = info.rSelectionBox.bottom; ymax = info.rSelectionBox.top;
} else {
xmin = ymin = 0;
xmax = head.biWidth; ymax=head.biHeight;
}
for(int32_t y=ymin; y<ymax; y++){
info.nProgress = (int32_t)(100*(y-ymin)/(ymax-ymin));
if (info.nEscape) break;
for(int32_t x=xmin; x<xmax; x++){
#if CXIMAGE_SUPPORT_SELECTION
if (BlindSelectionIsInside(x,y))
#endif //CXIMAGE_SUPPORT_SELECTION
{
if (bFullBlend){
color = RGBtoHSL(BlindGetPixelColor(x,y));
color.rgbRed=hue;
color.rgbGreen=sat;
BlindSetPixelColor(x,y,HSLtoRGB(color));
} else {
color = BlindGetPixelColor(x,y);
hsl.rgbRed=hue;
hsl.rgbGreen=sat;
hsl.rgbBlue = (uint8_t)RGB2GRAY(color.rgbRed,color.rgbGreen,color.rgbBlue);
hsl = HSLtoRGB(hsl);
//BlendPixelColor(x,y,hsl,blend);
//color.rgbRed = (uint8_t)(hsl.rgbRed * blend + color.rgbRed * (1.0f - blend));
//color.rgbBlue = (uint8_t)(hsl.rgbBlue * blend + color.rgbBlue * (1.0f - blend));
//color.rgbGreen = (uint8_t)(hsl.rgbGreen * blend + color.rgbGreen * (1.0f - blend));
color.rgbRed = (uint8_t)((hsl.rgbRed * a0 + color.rgbRed * a1)>>8);
color.rgbBlue = (uint8_t)((hsl.rgbBlue * a0 + color.rgbBlue * a1)>>8);
color.rgbGreen = (uint8_t)((hsl.rgbGreen * a0 + color.rgbGreen * a1)>>8);
BlindSetPixelColor(x,y,color);
}
}
}
}
} else {
for(uint32_t j=0; j<head.biClrUsed; j++){
if (bFullBlend){
color = RGBtoHSL(GetPaletteColor((uint8_t)j));
color.rgbRed=hue;
color.rgbGreen=sat;
SetPaletteColor((uint8_t)j,HSLtoRGB(color));
} else {
color = GetPaletteColor((uint8_t)j);
hsl.rgbRed=hue;
hsl.rgbGreen=sat;
hsl.rgbBlue = (uint8_t)RGB2GRAY(color.rgbRed,color.rgbGreen,color.rgbBlue);
hsl = HSLtoRGB(hsl);
color.rgbRed = (uint8_t)(hsl.rgbRed * blend + color.rgbRed * (1.0f - blend));
color.rgbBlue = (uint8_t)(hsl.rgbBlue * blend + color.rgbBlue * (1.0f - blend));
color.rgbGreen = (uint8_t)(hsl.rgbGreen * blend + color.rgbGreen * (1.0f - blend));
SetPaletteColor((uint8_t)j,color);
}
}
}
return true;
}
////////////////////////////////////////////////////////////////////////////////
/**
* Changes the brightness and the contrast of the image.
* \param brightness: can be from -255 to 255, if brightness is negative, the image becomes dark.
* \param contrast: can be from -100 to 100, the neutral value is 0.
* \return true if everything is ok
*/
bool CxImage::Light(int32_t brightness, int32_t contrast)
{
if (!pDib) return false;
float c=(100 + contrast)/100.0f;
brightness+=128;
uint8_t cTable[256]; //<nipper>
for (int32_t i=0;i<256;i++) {
cTable[i] = (uint8_t)max(0,min(255,(int32_t)((i-128)*c + brightness + 0.5f)));
}
return Lut(cTable);
}
////////////////////////////////////////////////////////////////////////////////
/**
* \return mean lightness of the image. Useful with Threshold() and Light()
*/
float CxImage::Mean()
{
if (!pDib) return 0;
CxImage tmp(*this,true);
if (!tmp.IsValid()){
strcpy(info.szLastError,tmp.GetLastError());
return false;
}
tmp.GrayScale();
float sum=0;
int32_t xmin,xmax,ymin,ymax;
if (pSelection){
xmin = info.rSelectionBox.left; xmax = info.rSelectionBox.right;
ymin = info.rSelectionBox.bottom; ymax = info.rSelectionBox.top;
} else {
xmin = ymin = 0;
xmax = head.biWidth; ymax=head.biHeight;
}
if (xmin==xmax || ymin==ymax) return (float)0.0;
uint8_t *iSrc=tmp.info.pImage;
iSrc += tmp.info.dwEffWidth*ymin; // necessary for selections <Admir Hodzic>
for(int32_t y=ymin; y<ymax; y++){
info.nProgress = (int32_t)(100*(y-ymin)/(ymax-ymin)); //<zhanghk><Anatoly Ivasyuk>
for(int32_t x=xmin; x<xmax; x++){
sum+=iSrc[x];
}
iSrc+=tmp.info.dwEffWidth;
}
return sum/(xmax-xmin)/(ymax-ymin);
}
////////////////////////////////////////////////////////////////////////////////
/**
* 2D linear filter
* \param kernel: convolving matrix, in row format.
* \param Ksize: size of the kernel.
* \param Kfactor: normalization constant.
* \param Koffset: bias.
* \verbatim Example: the "soften" filter uses this kernel:
1 1 1
1 8 1
1 1 1
the function needs: kernel={1,1,1,1,8,1,1,1,1}; Ksize=3; Kfactor=16; Koffset=0; \endverbatim
* \return true if everything is ok
*/
bool CxImage::Filter(int32_t* kernel, int32_t Ksize, int32_t Kfactor, int32_t Koffset)
{
if (!pDib) return false;
int32_t k2 = Ksize/2;
int32_t kmax= Ksize-k2;
int32_t r,g,b,i;
int32_t ksumcur,ksumtot;
RGBQuad c;
CxImage tmp(*this);
if (!tmp.IsValid()){
strcpy(info.szLastError,tmp.GetLastError());
return false;
}
int32_t xmin,xmax,ymin,ymax;
if (pSelection){
xmin = info.rSelectionBox.left; xmax = info.rSelectionBox.right;
ymin = info.rSelectionBox.bottom; ymax = info.rSelectionBox.top;
} else {
xmin = ymin = 0;
xmax = head.biWidth; ymax=head.biHeight;
}
ksumtot = 0;
for(int32_t j=-k2;j<kmax;j++){
for(int32_t k=-k2;k<kmax;k++){
ksumtot += kernel[(j+k2)+Ksize*(k+k2)];
}
}
if ((head.biBitCount==8) && IsGrayScale())
{
uint8_t* cPtr;
uint8_t* cPtr2;
int32_t iCount;
int32_t iY, iY2, iY1;
cPtr = info.pImage;
cPtr2 = (uint8_t *)tmp.info.pImage;
for(int32_t y=ymin; y<ymax; y++){
info.nProgress = (int32_t)(100*(y-ymin)/(ymax-ymin));
if (info.nEscape) break;
iY1 = y*info.dwEffWidth+xmin;
for(int32_t x=xmin; x<xmax; x++, iY1++){
#if CXIMAGE_SUPPORT_SELECTION
if (BlindSelectionIsInside(x,y))
#endif //CXIMAGE_SUPPORT_SELECTION
{
b=ksumcur=0;
iCount = 0;
iY2 = ((y-k2)*info.dwEffWidth);
for(int32_t j=-k2;j<kmax;j++, iY2+=info.dwEffWidth)
{
if (0>(y+j) || (y+j)>=head.biHeight) continue;
iY = iY2+x;
for(int32_t k=-k2;k<kmax;k++, iCount++)
{
if (0>(x+k) || (x+k)>=head.biWidth) continue;
i=kernel[iCount];
b += cPtr[iY+k] * i;
ksumcur += i;
}
}
if (Kfactor==0 || ksumcur==0){
cPtr2[iY1] = (uint8_t)min(255, max(0,(int32_t)(b + Koffset)));
} else if (ksumtot == ksumcur) {
cPtr2[iY1] = (uint8_t)min(255, max(0,(int32_t)(b/Kfactor + Koffset)));
} else {
cPtr2[iY1] = (uint8_t)min(255, max(0,(int32_t)((b*ksumtot)/(ksumcur*Kfactor) + Koffset)));
}
}
}
}
}
else
{
for(int32_t y=ymin; y<ymax; y++){
info.nProgress = (int32_t)(100*(y-ymin)/(ymax-ymin));
if (info.nEscape) break;
for(int32_t x=xmin; x<xmax; x++){
#if CXIMAGE_SUPPORT_SELECTION
if (BlindSelectionIsInside(x,y))
#endif //CXIMAGE_SUPPORT_SELECTION
{
r=b=g=ksumcur=0;
for(int32_t j=-k2;j<kmax;j++){
for(int32_t k=-k2;k<kmax;k++){
if (!IsInside(x+j,y+k)) continue;
c = BlindGetPixelColor(x+j,y+k);
i = kernel[(j+k2)+Ksize*(k+k2)];
r += c.rgbRed * i;
g += c.rgbGreen * i;
b += c.rgbBlue * i;
ksumcur += i;
}
}
if (Kfactor==0 || ksumcur==0){
c.rgbRed = (uint8_t)min(255, max(0,(int32_t)(r + Koffset)));
c.rgbGreen = (uint8_t)min(255, max(0,(int32_t)(g + Koffset)));
c.rgbBlue = (uint8_t)min(255, max(0,(int32_t)(b + Koffset)));
} else if (ksumtot == ksumcur) {
c.rgbRed = (uint8_t)min(255, max(0,(int32_t)(r/Kfactor + Koffset)));
c.rgbGreen = (uint8_t)min(255, max(0,(int32_t)(g/Kfactor + Koffset)));
c.rgbBlue = (uint8_t)min(255, max(0,(int32_t)(b/Kfactor + Koffset)));
} else {
c.rgbRed = (uint8_t)min(255, max(0,(int32_t)((r*ksumtot)/(ksumcur*Kfactor) + Koffset)));
c.rgbGreen = (uint8_t)min(255, max(0,(int32_t)((g*ksumtot)/(ksumcur*Kfactor) + Koffset)));
c.rgbBlue = (uint8_t)min(255, max(0,(int32_t)((b*ksumtot)/(ksumcur*Kfactor) + Koffset)));
}
tmp.BlindSetPixelColor(x,y,c);
}
}
}
}
Transfer(tmp);
return true;
}
////////////////////////////////////////////////////////////////////////////////
/**
* Enhance the dark areas of the image
* \param Ksize: size of the kernel.
* \return true if everything is ok
*/
bool CxImage::Erode(int32_t Ksize)
{
if (!pDib) return false;
int32_t k2 = Ksize/2;
int32_t kmax= Ksize-k2;
uint8_t r,g,b;
RGBQuad c;
CxImage tmp(*this);
if (!tmp.IsValid()){
strcpy(info.szLastError,tmp.GetLastError());
return false;
}
int32_t xmin,xmax,ymin,ymax;
if (pSelection){
xmin = info.rSelectionBox.left; xmax = info.rSelectionBox.right;
ymin = info.rSelectionBox.bottom; ymax = info.rSelectionBox.top;
} else {
xmin = ymin = 0;
xmax = head.biWidth; ymax=head.biHeight;
}
for(int32_t y=ymin; y<ymax; y++){
info.nProgress = (int32_t)(100*(y-ymin)/(ymax-ymin));
if (info.nEscape) break;
for(int32_t x=xmin; x<xmax; x++){
#if CXIMAGE_SUPPORT_SELECTION
if (BlindSelectionIsInside(x,y))
#endif //CXIMAGE_SUPPORT_SELECTION
{
r=b=g=255;
for(int32_t j=-k2;j<kmax;j++){
for(int32_t k=-k2;k<kmax;k++){
if (!IsInside(x+j,y+k)) continue;
c = BlindGetPixelColor(x+j,y+k);
if (c.rgbRed < r) r=c.rgbRed;
if (c.rgbGreen < g) g=c.rgbGreen;
if (c.rgbBlue < b) b=c.rgbBlue;
}
}
c.rgbRed = r;
c.rgbGreen = g;
c.rgbBlue = b;
tmp.BlindSetPixelColor(x,y,c);
}
}
}
Transfer(tmp);
return true;
}
////////////////////////////////////////////////////////////////////////////////
/**
* Enhance the light areas of the image
* \param Ksize: size of the kernel.
* \return true if everything is ok
*/
bool CxImage::Dilate(int32_t Ksize)
{
if (!pDib) return false;
int32_t k2 = Ksize/2;
int32_t kmax= Ksize-k2;
uint8_t r,g,b;
RGBQuad c;
CxImage tmp(*this);
if (!tmp.IsValid()){
strcpy(info.szLastError,tmp.GetLastError());
return false;
}
int32_t xmin,xmax,ymin,ymax;
if (pSelection){
xmin = info.rSelectionBox.left; xmax = info.rSelectionBox.right;
ymin = info.rSelectionBox.bottom; ymax = info.rSelectionBox.top;
} else {
xmin = ymin = 0;
xmax = head.biWidth; ymax=head.biHeight;
}
for(int32_t y=ymin; y<ymax; y++){
info.nProgress = (int32_t)(100*(y-ymin)/(ymax-ymin));
if (info.nEscape) break;
for(int32_t x=xmin; x<xmax; x++){
#if CXIMAGE_SUPPORT_SELECTION
if (BlindSelectionIsInside(x,y))
#endif //CXIMAGE_SUPPORT_SELECTION
{