From c91847d549cc1c30eb15504a15ea9a6d5aa48165 Mon Sep 17 00:00:00 2001
From: "chirs241097@gmail.com"
 <chirs241097@gmail.com@c17bf020-1265-9734-9302-a83f62007ddb>
Date: Sun, 12 Jan 2014 14:43:14 +0000
Subject:

---
 hge/CxImage/ximapal.cpp | 834 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 834 insertions(+)
 create mode 100644 hge/CxImage/ximapal.cpp

(limited to 'hge/CxImage/ximapal.cpp')

diff --git a/hge/CxImage/ximapal.cpp b/hge/CxImage/ximapal.cpp
new file mode 100644
index 0000000..fe0615b
--- /dev/null
+++ b/hge/CxImage/ximapal.cpp
@@ -0,0 +1,834 @@
+// xImaPal.cpp : Palette and Pixel functions
+/* 07/08/2001 v1.00 - Davide Pizzolato - www.xdp.it
+ * CxImage version 7.0.0 31/Dec/2010
+ */
+
+#include "ximage.h"
+
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * returns the palette dimension in byte
+ */
+uint32_t CxImage::GetPaletteSize()
+{
+	return (head.biClrUsed * sizeof(RGBQUAD));
+}
+////////////////////////////////////////////////////////////////////////////////
+void CxImage::SetPaletteColor(uint8_t idx, uint8_t r, uint8_t g, uint8_t b, uint8_t alpha)
+{
+	if ((pDib)&&(head.biClrUsed)){
+		uint8_t* iDst = (uint8_t*)(pDib) + sizeof(BITMAPINFOHEADER);
+		if (idx<head.biClrUsed){
+			int32_t ldx=idx*sizeof(RGBQUAD);
+			iDst[ldx++] = (uint8_t) b;
+			iDst[ldx++] = (uint8_t) g;
+			iDst[ldx++] = (uint8_t) r;
+			iDst[ldx] = (uint8_t) alpha;
+			info.last_c_isvalid = false;
+		}
+	}
+}
+////////////////////////////////////////////////////////////////////////////////
+void CxImage::SetPaletteColor(uint8_t idx, RGBQUAD c)
+{
+	if ((pDib)&&(head.biClrUsed)){
+		uint8_t* iDst = (uint8_t*)(pDib) + sizeof(BITMAPINFOHEADER);
+		if (idx<head.biClrUsed){
+			int32_t ldx=idx*sizeof(RGBQUAD);
+			iDst[ldx++] = (uint8_t) c.rgbBlue;
+			iDst[ldx++] = (uint8_t) c.rgbGreen;
+			iDst[ldx++] = (uint8_t) c.rgbRed;
+			iDst[ldx] = (uint8_t) c.rgbReserved;
+			info.last_c_isvalid = false;
+		}
+	}
+}
+////////////////////////////////////////////////////////////////////////////////
+void CxImage::SetPaletteColor(uint8_t idx, COLORREF cr)
+{
+	if ((pDib)&&(head.biClrUsed)){
+		uint8_t* iDst = (uint8_t*)(pDib) + sizeof(BITMAPINFOHEADER);
+		if (idx<head.biClrUsed){
+			int32_t ldx=idx*sizeof(RGBQUAD);
+			iDst[ldx++] = (uint8_t) GetBValue(cr);
+			iDst[ldx++] = (uint8_t) GetGValue(cr);
+			iDst[ldx++] = (uint8_t) GetRValue(cr);
+			iDst[ldx] = (uint8_t) 0;
+			info.last_c_isvalid = false;
+		}
+	}
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * returns the pointer to the first palette index
+ */
+RGBQUAD* CxImage::GetPalette() const
+{
+	if ((pDib)&&(head.biClrUsed))
+		return (RGBQUAD*)((uint8_t*)pDib + sizeof(BITMAPINFOHEADER));
+	return NULL;
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Returns the color of the specified index.
+ */
+RGBQUAD CxImage::GetPaletteColor(uint8_t idx)
+{
+	RGBQUAD rgb = {0,0,0,0};
+	if ((pDib)&&(head.biClrUsed)){
+		uint8_t* iDst = (uint8_t*)(pDib) + sizeof(BITMAPINFOHEADER);
+		if (idx<head.biClrUsed){
+			int32_t ldx=idx*sizeof(RGBQUAD);
+			rgb.rgbBlue = iDst[ldx++];
+			rgb.rgbGreen=iDst[ldx++];
+			rgb.rgbRed =iDst[ldx++];
+			rgb.rgbReserved = iDst[ldx];
+		}
+	}
+	return rgb;
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Returns the palette index of the specified pixel.
+ */
+uint8_t CxImage::GetPixelIndex(int32_t x,int32_t y)
+{
+	if ((pDib==NULL)||(head.biClrUsed==0)) return 0;
+
+	if ((x<0)||(y<0)||(x>=head.biWidth)||(y>=head.biHeight)) {
+		if (info.nBkgndIndex >= 0)	return (uint8_t)info.nBkgndIndex;
+		else return *info.pImage;
+	}
+	if (head.biBitCount==8){
+		return info.pImage[y*info.dwEffWidth + x];
+	} else {
+		uint8_t pos;
+		uint8_t iDst= info.pImage[y*info.dwEffWidth + (x*head.biBitCount >> 3)];
+		if (head.biBitCount==4){
+			pos = (uint8_t)(4*(1-x%2));
+			iDst &= (0x0F<<pos);
+			return (uint8_t)(iDst >> pos);
+		} else if (head.biBitCount==1){
+			pos = (uint8_t)(7-x%8);
+			iDst &= (0x01<<pos);
+			return (uint8_t)(iDst >> pos);
+		}
+	}
+	return 0;
+}
+////////////////////////////////////////////////////////////////////////////////
+uint8_t CxImage::BlindGetPixelIndex(const int32_t x,const int32_t y)
+{
+#ifdef _DEBUG
+	if ((pDib==NULL) || (head.biClrUsed==0) || !IsInside(x,y))
+  #if CXIMAGE_SUPPORT_EXCEPTION_HANDLING
+		throw 0;
+  #else
+		return 0;
+  #endif
+#endif
+
+	if (head.biBitCount==8){
+		return info.pImage[y*info.dwEffWidth + x];
+	} else {
+		uint8_t pos;
+		uint8_t iDst= info.pImage[y*info.dwEffWidth + (x*head.biBitCount >> 3)];
+		if (head.biBitCount==4){
+			pos = (uint8_t)(4*(1-x%2));
+			iDst &= (0x0F<<pos);
+			return (uint8_t)(iDst >> pos);
+		} else if (head.biBitCount==1){
+			pos = (uint8_t)(7-x%8);
+			iDst &= (0x01<<pos);
+			return (uint8_t)(iDst >> pos);
+		}
+	}
+	return 0;
+}
+////////////////////////////////////////////////////////////////////////////////
+RGBQUAD CxImage::GetPixelColor(int32_t x,int32_t y, bool bGetAlpha)
+{
+//	RGBQUAD rgb={0,0,0,0};
+	RGBQUAD rgb=info.nBkgndColor; //<mpwolski>
+	if ((pDib==NULL)||(x<0)||(y<0)||
+		(x>=head.biWidth)||(y>=head.biHeight)){
+		if (info.nBkgndIndex >= 0){
+			if (head.biBitCount<24) return GetPaletteColor((uint8_t)info.nBkgndIndex);
+			else return info.nBkgndColor;
+		} else if (pDib) return GetPixelColor(0,0);
+		return rgb;
+	}
+
+	if (head.biClrUsed){
+		rgb = GetPaletteColor(BlindGetPixelIndex(x,y));
+	} else {
+		uint8_t* iDst  = info.pImage + y*info.dwEffWidth + x*3;
+		rgb.rgbBlue = *iDst++;
+		rgb.rgbGreen= *iDst++;
+		rgb.rgbRed  = *iDst;
+	}
+#if CXIMAGE_SUPPORT_ALPHA
+	if (pAlpha && bGetAlpha) rgb.rgbReserved = BlindAlphaGet(x,y);
+#else
+	rgb.rgbReserved = 0;
+#endif //CXIMAGE_SUPPORT_ALPHA
+	return rgb;
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * This is (a bit) faster version of GetPixelColor. 
+ * It tests bounds only in debug mode (_DEBUG defined).
+ * 
+ * It is an error to request out-of-borders pixel with this method. 
+ * In DEBUG mode an exception will be thrown, and data will be violated in non-DEBUG mode. 
+ * \author ***bd*** 2.2004
+ */
+RGBQUAD CxImage::BlindGetPixelColor(const int32_t x,const int32_t y, bool bGetAlpha)
+{
+  RGBQUAD rgb;
+#ifdef _DEBUG
+	if ((pDib==NULL) || !IsInside(x,y))
+  #if CXIMAGE_SUPPORT_EXCEPTION_HANDLING
+		throw 0;
+  #else
+		{rgb.rgbReserved = 0; return rgb;}
+  #endif
+#endif
+
+	if (head.biClrUsed){
+		rgb = GetPaletteColor(BlindGetPixelIndex(x,y));
+	} else {
+		uint8_t* iDst  = info.pImage + y*info.dwEffWidth + x*3;
+		rgb.rgbBlue = *iDst++;
+		rgb.rgbGreen= *iDst++;
+		rgb.rgbRed  = *iDst;
+		rgb.rgbReserved = 0; //needed for images without alpha layer
+	}
+#if CXIMAGE_SUPPORT_ALPHA
+	if (pAlpha && bGetAlpha) rgb.rgbReserved = BlindAlphaGet(x,y);
+#else
+	rgb.rgbReserved = 0;
+#endif //CXIMAGE_SUPPORT_ALPHA
+	return rgb;
+}
+////////////////////////////////////////////////////////////////////////////////
+uint8_t CxImage::GetPixelGray(int32_t x, int32_t y)
+{
+	RGBQUAD color = GetPixelColor(x,y);
+	return (uint8_t)RGB2GRAY(color.rgbRed,color.rgbGreen,color.rgbBlue);
+}
+////////////////////////////////////////////////////////////////////////////////
+void CxImage::BlindSetPixelIndex(int32_t x,int32_t y,uint8_t i)
+{
+#ifdef _DEBUG
+	if ((pDib==NULL)||(head.biClrUsed==0)||
+		(x<0)||(y<0)||(x>=head.biWidth)||(y>=head.biHeight))
+  #if CXIMAGE_SUPPORT_EXCEPTION_HANDLING
+		throw 0;
+  #else
+		return;
+  #endif
+#endif
+
+	if (head.biBitCount==8){
+		info.pImage[y*info.dwEffWidth + x]=i;
+		return;
+	} else {
+		uint8_t pos;
+		uint8_t* iDst= info.pImage + y*info.dwEffWidth + (x*head.biBitCount >> 3);
+		if (head.biBitCount==4){
+			pos = (uint8_t)(4*(1-x%2));
+			*iDst &= ~(0x0F<<pos);
+			*iDst |= ((i & 0x0F)<<pos);
+			return;
+		} else if (head.biBitCount==1){
+			pos = (uint8_t)(7-x%8);
+			*iDst &= ~(0x01<<pos);
+			*iDst |= ((i & 0x01)<<pos);
+			return;
+		}
+	}
+}
+////////////////////////////////////////////////////////////////////////////////
+void CxImage::SetPixelIndex(int32_t x,int32_t y,uint8_t i)
+{
+	if ((pDib==NULL)||(head.biClrUsed==0)||
+		(x<0)||(y<0)||(x>=head.biWidth)||(y>=head.biHeight)) return ;
+
+	if (head.biBitCount==8){
+		info.pImage[y*info.dwEffWidth + x]=i;
+		return;
+	} else {
+		uint8_t pos;
+		uint8_t* iDst= info.pImage + y*info.dwEffWidth + (x*head.biBitCount >> 3);
+		if (head.biBitCount==4){
+			pos = (uint8_t)(4*(1-x%2));
+			*iDst &= ~(0x0F<<pos);
+			*iDst |= ((i & 0x0F)<<pos);
+			return;
+		} else if (head.biBitCount==1){
+			pos = (uint8_t)(7-x%8);
+			*iDst &= ~(0x01<<pos);
+			*iDst |= ((i & 0x01)<<pos);
+			return;
+		}
+	}
+}
+////////////////////////////////////////////////////////////////////////////////
+void CxImage::SetPixelColor(int32_t x,int32_t y,COLORREF cr)
+{
+	SetPixelColor(x,y,RGBtoRGBQUAD(cr));
+}
+////////////////////////////////////////////////////////////////////////////////
+void CxImage::BlindSetPixelColor(int32_t x,int32_t y,RGBQUAD c, bool bSetAlpha)
+{
+#ifdef _DEBUG
+	if ((pDib==NULL)||(x<0)||(y<0)||
+		(x>=head.biWidth)||(y>=head.biHeight))
+  #if CXIMAGE_SUPPORT_EXCEPTION_HANDLING
+		throw 0;
+  #else
+		return;
+  #endif
+#endif
+	if (head.biClrUsed)
+		BlindSetPixelIndex(x,y,GetNearestIndex(c));
+	else {
+		uint8_t* iDst = info.pImage + y*info.dwEffWidth + x*3;
+		*iDst++ = c.rgbBlue;
+		*iDst++ = c.rgbGreen;
+		*iDst   = c.rgbRed;
+	}
+#if CXIMAGE_SUPPORT_ALPHA
+	if (bSetAlpha) AlphaSet(x,y,c.rgbReserved);
+#endif //CXIMAGE_SUPPORT_ALPHA
+}
+////////////////////////////////////////////////////////////////////////////////
+void CxImage::SetPixelColor(int32_t x,int32_t y,RGBQUAD c, bool bSetAlpha)
+{
+	if ((pDib==NULL)||(x<0)||(y<0)||
+		(x>=head.biWidth)||(y>=head.biHeight)) return;
+	if (head.biClrUsed)
+		BlindSetPixelIndex(x,y,GetNearestIndex(c));
+	else {
+		uint8_t* iDst = info.pImage + y*info.dwEffWidth + x*3;
+		*iDst++ = c.rgbBlue;
+		*iDst++ = c.rgbGreen;
+		*iDst   = c.rgbRed;
+	}
+#if CXIMAGE_SUPPORT_ALPHA
+	if (bSetAlpha) AlphaSet(x,y,c.rgbReserved);
+#endif //CXIMAGE_SUPPORT_ALPHA
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Blends the current pixel color with a new color.
+ * \param x,y = pixel
+ * \param c = new color
+ * \param blend = can be from 0 (no effect) to 1 (full effect).
+ * \param bSetAlpha = if true, blends also the alpha component stored in c.rgbReserved
+ */
+void CxImage::BlendPixelColor(int32_t x,int32_t y,RGBQUAD c, float blend, bool bSetAlpha)
+{
+	if ((pDib==NULL)||(x<0)||(y<0)||
+		(x>=head.biWidth)||(y>=head.biHeight)) return;
+
+	int32_t a0 = (int32_t)(256*blend);
+	int32_t a1 = 256 - a0;
+
+	RGBQUAD c0 = BlindGetPixelColor(x,y);
+	c.rgbRed  = (uint8_t)((c.rgbRed * a0 + c0.rgbRed * a1)>>8);
+	c.rgbBlue  = (uint8_t)((c.rgbBlue * a0 + c0.rgbBlue * a1)>>8);
+	c.rgbGreen  = (uint8_t)((c.rgbGreen * a0 + c0.rgbGreen * a1)>>8);
+
+	if (head.biClrUsed)
+		BlindSetPixelIndex(x,y,GetNearestIndex(c));
+	else {
+		uint8_t* iDst = info.pImage + y*info.dwEffWidth + x*3;
+		*iDst++ = c.rgbBlue;
+		*iDst++ = c.rgbGreen;
+		*iDst   = c.rgbRed;
+#if CXIMAGE_SUPPORT_ALPHA
+		if (bSetAlpha) AlphaSet(x,y,c.rgbReserved);
+#endif //CXIMAGE_SUPPORT_ALPHA
+	}
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Returns the best palette index that matches a specified color.
+ */
+uint8_t CxImage::GetNearestIndex(RGBQUAD c)
+{
+	if ((pDib==NULL)||(head.biClrUsed==0)) return 0;
+
+	// <RJ> check matching with the previous result
+	if (info.last_c_isvalid && (*(int32_t*)&info.last_c == *(int32_t*)&c)) return info.last_c_index;
+	info.last_c = c;
+	info.last_c_isvalid = true;
+
+	uint8_t* iDst = (uint8_t*)(pDib) + sizeof(BITMAPINFOHEADER);
+	int32_t distance=200000;
+	int32_t i,j = 0;
+	int32_t k,l;
+	int32_t m = (int32_t)(head.biClrImportant==0 ? head.biClrUsed : head.biClrImportant);
+	for(i=0,l=0;i<m;i++,l+=sizeof(RGBQUAD)){
+		k = (iDst[l]-c.rgbBlue)*(iDst[l]-c.rgbBlue)+
+			(iDst[l+1]-c.rgbGreen)*(iDst[l+1]-c.rgbGreen)+
+			(iDst[l+2]-c.rgbRed)*(iDst[l+2]-c.rgbRed);
+//		k = abs(iDst[l]-c.rgbBlue)+abs(iDst[l+1]-c.rgbGreen)+abs(iDst[l+2]-c.rgbRed);
+		if (k==0){
+			j=i;
+			break;
+		}
+		if (k<distance){
+			distance=k;
+			j=i;
+		}
+	}
+	info.last_c_index = (uint8_t)j;
+	return (uint8_t)j;
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * swaps the blue and red components (for RGB images)
+ * \param buffer : pointer to the pixels
+ * \param length : number of bytes to swap. lenght may not exceed the scan line.
+ */
+void CxImage::RGBtoBGR(uint8_t *buffer, int32_t length)
+{
+	if (buffer && (head.biClrUsed==0)){
+		uint8_t temp;
+		length = min(length,(int32_t)info.dwEffWidth);
+		length = min(length,(int32_t)(3*head.biWidth));
+		for (int32_t i=0;i<length;i+=3){
+			temp = buffer[i]; buffer[i] = buffer[i+2]; buffer[i+2] = temp;
+		}
+	}
+}
+////////////////////////////////////////////////////////////////////////////////
+RGBQUAD CxImage::RGBtoRGBQUAD(COLORREF cr)
+{
+	RGBQUAD c;
+	c.rgbRed = GetRValue(cr);	/* get R, G, and B out of uint32_t */
+	c.rgbGreen = GetGValue(cr);
+	c.rgbBlue = GetBValue(cr);
+	c.rgbReserved=0;
+	return c;
+}
+////////////////////////////////////////////////////////////////////////////////
+COLORREF CxImage::RGBQUADtoRGB (RGBQUAD c)
+{
+	return RGB(c.rgbRed,c.rgbGreen,c.rgbBlue);
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Returns the color of the specified index.
+ * \param i = palette index
+ * \param r, g, b = output color channels
+ */
+bool CxImage::GetPaletteColor(uint8_t i, uint8_t* r, uint8_t* g, uint8_t* b)
+{
+	RGBQUAD* ppal=GetPalette();
+	if (ppal) {
+		*r = ppal[i].rgbRed;
+		*g = ppal[i].rgbGreen;
+		*b = ppal[i].rgbBlue; 
+		return true;
+	}
+	return false;
+}
+////////////////////////////////////////////////////////////////////////////////
+void CxImage::SetPalette(uint32_t n, uint8_t *r, uint8_t *g, uint8_t *b)
+{
+	if ((!r)||(pDib==NULL)||(head.biClrUsed==0)) return;
+	if (!g) g = r;
+	if (!b) b = g;
+	RGBQUAD* ppal=GetPalette();
+	uint32_t m=min(n,head.biClrUsed);
+	for (uint32_t i=0; i<m;i++){
+		ppal[i].rgbRed=r[i];
+		ppal[i].rgbGreen=g[i];
+		ppal[i].rgbBlue=b[i];
+	}
+	info.last_c_isvalid = false;
+}
+////////////////////////////////////////////////////////////////////////////////
+void CxImage::SetPalette(rgb_color *rgb,uint32_t nColors)
+{
+	if ((!rgb)||(pDib==NULL)||(head.biClrUsed==0)) return;
+	RGBQUAD* ppal=GetPalette();
+	uint32_t m=min(nColors,head.biClrUsed);
+	for (uint32_t i=0; i<m;i++){
+		ppal[i].rgbRed=rgb[i].r;
+		ppal[i].rgbGreen=rgb[i].g;
+		ppal[i].rgbBlue=rgb[i].b;
+	}
+	info.last_c_isvalid = false;
+}
+////////////////////////////////////////////////////////////////////////////////
+void CxImage::SetPalette(RGBQUAD* pPal,uint32_t nColors)
+{
+	if ((pPal==NULL)||(pDib==NULL)||(head.biClrUsed==0)) return;
+	memcpy(GetPalette(),pPal,min(GetPaletteSize(),nColors*sizeof(RGBQUAD)));
+	info.last_c_isvalid = false;
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Sets (or replaces) the palette to gray scale palette.
+ * The function doesn't change the pixels; for standard
+ * gray scale conversion use GrayScale().
+ */
+void CxImage::SetGrayPalette()
+{
+	if ((pDib==NULL)||(head.biClrUsed==0)) return;
+	RGBQUAD* pal=GetPalette();
+	for (uint32_t ni=0;ni<head.biClrUsed;ni++)
+		pal[ni].rgbBlue=pal[ni].rgbGreen = pal[ni].rgbRed = (uint8_t)(ni*(255/(head.biClrUsed-1)));
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Colorize the palette.
+ * \sa Colorize
+ */
+void CxImage::BlendPalette(COLORREF cr,int32_t perc)
+{
+	if ((pDib==NULL)||(head.biClrUsed==0)) return;
+	uint8_t* iDst = (uint8_t*)(pDib) + sizeof(BITMAPINFOHEADER);
+	uint32_t i,r,g,b;
+	RGBQUAD* pPal=(RGBQUAD*)iDst;
+	r = GetRValue(cr);
+	g = GetGValue(cr);
+	b = GetBValue(cr);
+	if (perc>100) perc=100;
+	for(i=0;i<head.biClrUsed;i++){
+		pPal[i].rgbBlue=(uint8_t)((pPal[i].rgbBlue*(100-perc)+b*perc)/100);
+		pPal[i].rgbGreen =(uint8_t)((pPal[i].rgbGreen*(100-perc)+g*perc)/100);
+		pPal[i].rgbRed =(uint8_t)((pPal[i].rgbRed*(100-perc)+r*perc)/100);
+	}
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Returns true if the image has 256 colors and a linear grey scale palette.
+ */
+bool CxImage::IsGrayScale()
+{
+	RGBQUAD* ppal=GetPalette();
+	if(!(pDib && ppal && head.biClrUsed)) return false;
+	for(uint32_t i=0;i<head.biClrUsed;i++){
+		if (ppal[i].rgbBlue!=i || ppal[i].rgbGreen!=i || ppal[i].rgbRed!=i) return false;
+	}
+	return true;
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * swap two indexes in the image and their colors in the palette
+ */
+void CxImage::SwapIndex(uint8_t idx1, uint8_t idx2)
+{
+	RGBQUAD* ppal=GetPalette();
+	if(!(pDib && ppal)) return;
+	//swap the colors
+	RGBQUAD tempRGB=GetPaletteColor(idx1);
+	SetPaletteColor(idx1,GetPaletteColor(idx2));
+	SetPaletteColor(idx2,tempRGB);
+	//swap the pixels
+	uint8_t idx;
+	for(int32_t y=0; y < head.biHeight; y++){
+		for(int32_t x=0; x < head.biWidth; x++){
+			idx=BlindGetPixelIndex(x,y);
+			if (idx==idx1) BlindSetPixelIndex(x,y,idx2);
+			if (idx==idx2) BlindSetPixelIndex(x,y,idx1);
+		}
+	}
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * swap Red and Blue colors
+ */
+void CxImage::SwapRGB2BGR()
+{
+	if (!pDib) return;
+
+	if (head.biClrUsed){
+		RGBQUAD* ppal=GetPalette();
+		uint8_t b;
+		if(!ppal) return;
+		for(uint16_t a=0;a<head.biClrUsed;a++){
+			b=ppal[a].rgbBlue; ppal[a].rgbBlue=ppal[a].rgbRed; ppal[a].rgbRed=b;
+		}
+	} else {
+		for(int32_t y=0;y<head.biHeight;y++){
+			RGBtoBGR(GetBits(y),3*head.biWidth);
+		}
+	}
+}
+////////////////////////////////////////////////////////////////////////////////
+bool CxImage::IsTransparent(int32_t x, int32_t y)
+{
+	if (!pDib) return false;
+
+	if (info.nBkgndIndex>=0){
+		if (head.biClrUsed){
+			if (GetPixelIndex(x,y) == info.nBkgndIndex) return true;
+		} else {
+			RGBQUAD ct = info.nBkgndColor;
+			RGBQUAD c = GetPixelColor(x,y,false);
+			if (*(int32_t*)&c==*(int32_t*)&ct) return true;
+		}
+	}
+
+#if CXIMAGE_SUPPORT_ALPHA
+	if (pAlpha) return AlphaGet(x,y)==0;
+#endif
+
+	return false;
+}
+////////////////////////////////////////////////////////////////////////////////
+bool CxImage::GetTransparentMask(CxImage* iDst)
+{
+	if (!pDib) return false;
+
+	CxImage tmp;
+	tmp.Create(head.biWidth, head.biHeight, 1, GetType());
+	tmp.SetStdPalette();
+	tmp.Clear(0);
+
+	for(int32_t y=0; y<head.biHeight; y++){
+		for(int32_t x=0; x<head.biWidth; x++){
+			if (IsTransparent(x,y)){
+				tmp.BlindSetPixelIndex(x,y,1);
+			}
+		}
+	}
+
+	if (iDst) iDst->Transfer(tmp);
+	else Transfer(tmp);
+
+	return true;
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Checks if image has the same palette, if any.
+ * \param img = image to compare.
+ * \param bCheckAlpha = check also the rgbReserved field.
+ */
+bool CxImage::IsSamePalette(CxImage &img, bool bCheckAlpha)
+{
+	if (head.biClrUsed != img.head.biClrUsed)
+		return false;
+	if (head.biClrUsed == 0)
+		return false;
+
+	RGBQUAD c1,c2;
+	for (uint32_t n=0; n<head.biClrUsed; n++){
+		c1 = GetPaletteColor((uint8_t)n);
+		c2 = img.GetPaletteColor((uint8_t)n);
+		if (c1.rgbRed != c2.rgbRed) return false;
+		if (c1.rgbBlue != c2.rgbBlue) return false;
+		if (c1.rgbGreen != c2.rgbGreen) return false;
+		if (bCheckAlpha && (c1.rgbReserved != c2.rgbReserved)) return false;
+	}
+	return true;
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * \sa SetClrImportant
+ */
+uint32_t CxImage::GetClrImportant() const
+{
+	return head.biClrImportant;
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * sets the maximum number of colors that some functions like
+ * DecreaseBpp() or GetNearestIndex() will use on indexed images
+ * \param ncolors should be less than 2^bpp,
+ * or 0 if all the colors are important.
+ */
+void CxImage::SetClrImportant(uint32_t ncolors)
+{
+	if (ncolors==0 || ncolors>256) {
+		head.biClrImportant = 0;
+		return;
+	}
+
+	switch(head.biBitCount){
+	case 1:
+		head.biClrImportant = min(ncolors,2);
+		break;
+	case 4:
+		head.biClrImportant = min(ncolors,16);
+		break;
+	case 8:
+		head.biClrImportant = ncolors;
+		break;
+	}
+	return;
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Returns pointer to pixel. Currently implemented only for truecolor images.
+ *  
+ * \param  x,y - coordinates
+ *
+ * \return pointer to first byte of pixel data
+ *
+ * \author ***bd*** 2.2004
+ */
+void* CxImage::BlindGetPixelPointer(const int32_t x, const int32_t y)
+{
+#ifdef _DEBUG
+	if ((pDib==NULL) || !IsInside(x,y))
+  #if CXIMAGE_SUPPORT_EXCEPTION_HANDLING
+		throw 0;
+  #else
+		return 0;
+  #endif
+#endif
+  if (!IsIndexed())
+    return info.pImage + y*info.dwEffWidth + x*3;
+  else
+    return 0;
+}
+////////////////////////////////////////////////////////////////////////////////
+void CxImage::DrawLine(int32_t StartX, int32_t EndX, int32_t StartY, int32_t EndY, COLORREF cr)
+{
+	DrawLine(StartX, EndX, StartY, EndY, RGBtoRGBQUAD(cr));
+}
+////////////////////////////////////////////////////////////////////////////////
+void CxImage::DrawLine(int32_t StartX, int32_t EndX, int32_t StartY, int32_t EndY, RGBQUAD color, bool bSetAlpha)
+{
+	if (!pDib) return;
+	//////////////////////////////////////////////////////
+	// Draws a line using the Bresenham line algorithm
+	// Thanks to Jordan DeLozier <JDL>
+	//////////////////////////////////////////////////////
+	int32_t x1 = StartX;
+	int32_t y1 = StartY;
+	int32_t x = x1;                       // Start x off at the first pixel
+	int32_t y = y1;                       // Start y off at the first pixel
+	int32_t x2 = EndX;
+	int32_t y2 = EndY;
+
+	int32_t xinc1,xinc2,yinc1,yinc2;      // Increasing values
+	int32_t den, num, numadd,numpixels;   
+	int32_t deltax = abs(x2 - x1);        // The difference between the x's
+	int32_t deltay = abs(y2 - y1);        // The difference between the y's
+
+	// Get Increasing Values
+	if (x2 >= x1) {                // The x-values are increasing
+		xinc1 = 1;
+		xinc2 = 1;
+	} else {                         // The x-values are decreasing
+		xinc1 = -1;
+		xinc2 = -1;
+	}
+
+	if (y2 >= y1) {                // The y-values are increasing
+		yinc1 = 1;
+		yinc2 = 1;
+	} else {                         // The y-values are decreasing
+		yinc1 = -1;
+		yinc2 = -1;
+	}
+
+	// Actually draw the line
+	if (deltax >= deltay)         // There is at least one x-value for every y-value
+	{
+		xinc1 = 0;                  // Don't change the x when numerator >= denominator
+		yinc2 = 0;                  // Don't change the y for every iteration
+		den = deltax;
+		num = deltax / 2;
+		numadd = deltay;
+		numpixels = deltax;         // There are more x-values than y-values
+	}
+	else                          // There is at least one y-value for every x-value
+	{
+		xinc2 = 0;                  // Don't change the x for every iteration
+		yinc1 = 0;                  // Don't change the y when numerator >= denominator
+		den = deltay;
+		num = deltay / 2;
+		numadd = deltax;
+		numpixels = deltay;         // There are more y-values than x-values
+	}
+	
+	for (int32_t curpixel = 0; curpixel <= numpixels; curpixel++)
+	{
+		// Draw the current pixel
+		SetPixelColor(x,y,color,bSetAlpha);
+		
+		num += numadd;              // Increase the numerator by the top of the fraction
+		if (num >= den)             // Check if numerator >= denominator
+		{
+			num -= den;               // Calculate the new numerator value
+			x += xinc1;               // Change the x as appropriate
+			y += yinc1;               // Change the y as appropriate
+		}
+		x += xinc2;                 // Change the x as appropriate
+		y += yinc2;                 // Change the y as appropriate
+	}
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Sets a palette with standard colors for 1, 4 and 8 bpp images.
+ */
+void CxImage::SetStdPalette()
+{
+	if (!pDib) return;
+	switch (head.biBitCount){
+	case 8:
+		{
+			const uint8_t pal256[1024] = {0,0,0,0,0,0,128,0,0,128,0,0,0,128,128,0,128,0,0,0,128,0,128,0,128,128,0,0,192,192,192,0,
+			192,220,192,0,240,202,166,0,212,240,255,0,177,226,255,0,142,212,255,0,107,198,255,0,
+			72,184,255,0,37,170,255,0,0,170,255,0,0,146,220,0,0,122,185,0,0,98,150,0,0,74,115,0,0,
+			50,80,0,212,227,255,0,177,199,255,0,142,171,255,0,107,143,255,0,72,115,255,0,37,87,255,0,0,
+			85,255,0,0,73,220,0,0,61,185,0,0,49,150,0,0,37,115,0,0,25,80,0,212,212,255,0,177,177,255,0,
+			142,142,255,0,107,107,255,0,72,72,255,0,37,37,255,0,0,0,254,0,0,0,220,0,0,0,185,0,0,0,150,0,
+			0,0,115,0,0,0,80,0,227,212,255,0,199,177,255,0,171,142,255,0,143,107,255,0,115,72,255,0,
+			87,37,255,0,85,0,255,0,73,0,220,0,61,0,185,0,49,0,150,0,37,0,115,0,25,0,80,0,240,212,255,0,
+			226,177,255,0,212,142,255,0,198,107,255,0,184,72,255,0,170,37,255,0,170,0,255,0,146,0,220,0,
+			122,0,185,0,98,0,150,0,74,0,115,0,50,0,80,0,255,212,255,0,255,177,255,0,255,142,255,0,255,107,255,0,
+			255,72,255,0,255,37,255,0,254,0,254,0,220,0,220,0,185,0,185,0,150,0,150,0,115,0,115,0,80,0,80,0,
+			255,212,240,0,255,177,226,0,255,142,212,0,255,107,198,0,255,72,184,0,255,37,170,0,255,0,170,0,
+			220,0,146,0,185,0,122,0,150,0,98,0,115,0,74,0,80,0,50,0,255,212,227,0,255,177,199,0,255,142,171,0,
+			255,107,143,0,255,72,115,0,255,37,87,0,255,0,85,0,220,0,73,0,185,0,61,0,150,0,49,0,115,0,37,0,
+			80,0,25,0,255,212,212,0,255,177,177,0,255,142,142,0,255,107,107,0,255,72,72,0,255,37,37,0,254,0,
+			0,0,220,0,0,0,185,0,0,0,150,0,0,0,115,0,0,0,80,0,0,0,255,227,212,0,255,199,177,0,255,171,142,0,
+			255,143,107,0,255,115,72,0,255,87,37,0,255,85,0,0,220,73,0,0,185,61,0,0,150,49,0,0,115,37,0,
+			0,80,25,0,0,255,240,212,0,255,226,177,0,255,212,142,0,255,198,107,0,255,184,72,0,255,170,37,0,
+			255,170,0,0,220,146,0,0,185,122,0,0,150,98,0,0,115,74,0,0,80,50,0,0,255,255,212,0,255,255,177,0,
+			255,255,142,0,255,255,107,0,255,255,72,0,255,255,37,0,254,254,0,0,220,220,0,0,185,185,0,0,150,150,0,
+			0,115,115,0,0,80,80,0,0,240,255,212,0,226,255,177,0,212,255,142,0,198,255,107,0,184,255,72,0,
+			170,255,37,0,170,255,0,0,146,220,0,0,122,185,0,0,98,150,0,0,74,115,0,0,50,80,0,0,227,255,212,0,
+			199,255,177,0,171,255,142,0,143,255,107,0,115,255,72,0,87,255,37,0,85,255,0,0,73,220,0,0,61,185,0,
+			0,49,150,0,0,37,115,0,0,25,80,0,0,212,255,212,0,177,255,177,0,142,255,142,0,107,255,107,0,72,255,72,0,
+			37,255,37,0,0,254,0,0,0,220,0,0,0,185,0,0,0,150,0,0,0,115,0,0,0,80,0,0,212,255,227,0,177,255,199,0,
+			142,255,171,0,107,255,143,0,72,255,115,0,37,255,87,0,0,255,85,0,0,220,73,0,0,185,61,0,0,150,49,0,0,
+			115,37,0,0,80,25,0,212,255,240,0,177,255,226,0,142,255,212,0,107,255,198,0,72,255,184,0,37,255,170,0,
+			0,255,170,0,0,220,146,0,0,185,122,0,0,150,98,0,0,115,74,0,0,80,50,0,212,255,255,0,177,255,255,0,
+			142,255,255,0,107,255,255,0,72,255,255,0,37,255,255,0,0,254,254,0,0,220,220,0,0,185,185,0,0,
+			150,150,0,0,115,115,0,0,80,80,0,242,242,242,0,230,230,230,0,218,218,218,0,206,206,206,0,194,194,194,0,
+			182,182,182,0,170,170,170,0,158,158,158,0,146,146,146,0,134,134,134,0,122,122,122,0,110,110,110,0,
+			98,98,98,0,86,86,86,0,74,74,74,0,62,62,62,0,50,50,50,0,38,38,38,0,26,26,26,0,14,14,14,0,240,251,255,0,
+			164,160,160,0,128,128,128,0,0,0,255,0,0,255,0,0,0,255,255,0,255,0,0,0,255,0,255,0,255,255,0,0,255,255,255,0};
+			memcpy(GetPalette(),pal256,1024);
+			break;
+		}
+	case 4:
+		{
+			const uint8_t pal16[64]={0,0,0,0,0,0,128,0,0,128,0,0,0,128,128,0,128,0,0,0,128,0,128,0,128,128,0,0,192,192,192,0,
+								128,128,128,0,0,0,255,0,0,255,0,0,0,255,255,0,255,0,0,0,255,0,255,0,255,255,0,0,255,255,255,0};
+			memcpy(GetPalette(),pal16,64);
+			break;
+		}
+	case 1:
+		{
+			const uint8_t pal2[8]={0,0,0,0,255,255,255,0};
+			memcpy(GetPalette(),pal2,8);
+			break;
+		}
+	}
+	info.last_c_isvalid = false;
+	return;
+}
+////////////////////////////////////////////////////////////////////////////////
-- 
cgit v1.2.3