diff options
Diffstat (limited to 'archive/hge/CxImage/ximatran.cpp')
| -rw-r--r-- | archive/hge/CxImage/ximatran.cpp | 2728 |
1 files changed, 0 insertions, 2728 deletions
diff --git a/archive/hge/CxImage/ximatran.cpp b/archive/hge/CxImage/ximatran.cpp deleted file mode 100644 index decac18..0000000 --- a/archive/hge/CxImage/ximatran.cpp +++ /dev/null @@ -1,2728 +0,0 @@ -// xImaTran.cpp : Transformation functions
-/* 07/08/2001 v1.00 - Davide Pizzolato - www.xdp.it
- * CxImage version 7.0.0 31/Dec/2010
- */
-
-#include "ximage.h"
-#include "ximath.h"
-
-#if CXIMAGE_SUPPORT_BASICTRANSFORMATIONS
-////////////////////////////////////////////////////////////////////////////////
-/**
- * Increases the number of bits per pixel of the image.
- * \param nbit: 4, 8, 24
- */
-bool CxImage::IncreaseBpp(uint32_t nbit)
-{
- if (!pDib) return false;
- switch (nbit){
- case 4:
- {
- if (head.biBitCount==4) return true;
- if (head.biBitCount>4) return false;
-
- CxImage tmp;
- tmp.CopyInfo(*this);
- tmp.Create(head.biWidth,head.biHeight,4,info.dwType);
- tmp.SetPalette(GetPalette(),GetNumColors());
- if (!tmp.IsValid()){
- strcpy(info.szLastError,tmp.GetLastError());
- return false;
- }
-
-
-#if CXIMAGE_SUPPORT_SELECTION
- tmp.SelectionCopy(*this);
-#endif //CXIMAGE_SUPPORT_SELECTION
-
-#if CXIMAGE_SUPPORT_ALPHA
- tmp.AlphaCopy(*this);
-#endif //CXIMAGE_SUPPORT_ALPHA
-
- for (int32_t y=0;y<head.biHeight;y++){
- if (info.nEscape) break;
- for (int32_t x=0;x<head.biWidth;x++){
- tmp.BlindSetPixelIndex(x,y,BlindGetPixelIndex(x,y));
- }
- }
- Transfer(tmp);
- return true;
- }
- case 8:
- {
- if (head.biBitCount==8) return true;
- if (head.biBitCount>8) return false;
-
- CxImage tmp;
- tmp.CopyInfo(*this);
- tmp.Create(head.biWidth,head.biHeight,8,info.dwType);
- tmp.SetPalette(GetPalette(),GetNumColors());
- if (!tmp.IsValid()){
- strcpy(info.szLastError,tmp.GetLastError());
- return false;
- }
-
-#if CXIMAGE_SUPPORT_SELECTION
- tmp.SelectionCopy(*this);
-#endif //CXIMAGE_SUPPORT_SELECTION
-
-#if CXIMAGE_SUPPORT_ALPHA
- tmp.AlphaCopy(*this);
-#endif //CXIMAGE_SUPPORT_ALPHA
-
- for (int32_t y=0;y<head.biHeight;y++){
- if (info.nEscape) break;
- for (int32_t x=0;x<head.biWidth;x++){
- tmp.BlindSetPixelIndex(x,y,BlindGetPixelIndex(x,y));
- }
- }
- Transfer(tmp);
- return true;
- }
- case 24:
- {
- if (head.biBitCount==24) return true;
- if (head.biBitCount>24) return false;
-
- CxImage tmp;
- tmp.CopyInfo(*this);
- tmp.Create(head.biWidth,head.biHeight,24,info.dwType);
- if (!tmp.IsValid()){
- strcpy(info.szLastError,tmp.GetLastError());
- return false;
- }
-
- if (info.nBkgndIndex>=0) //translate transparency
- tmp.info.nBkgndColor=GetPaletteColor((uint8_t)info.nBkgndIndex);
-
-#if CXIMAGE_SUPPORT_SELECTION
- tmp.SelectionCopy(*this);
-#endif //CXIMAGE_SUPPORT_SELECTION
-
-#if CXIMAGE_SUPPORT_ALPHA
- tmp.AlphaCopy(*this);
- if (AlphaPaletteIsValid() && !AlphaIsValid()) tmp.AlphaCreate();
-#endif //CXIMAGE_SUPPORT_ALPHA
-
- for (int32_t y=0;y<head.biHeight;y++){
- if (info.nEscape) break;
- for (int32_t x=0;x<head.biWidth;x++){
- tmp.BlindSetPixelColor(x,y,BlindGetPixelColor(x,y),true);
- }
- }
- Transfer(tmp);
- return true;
- }
- }
- return false;
-}
-////////////////////////////////////////////////////////////////////////////////
-bool CxImage::GrayScale()
-{
- if (!pDib) return false;
- if (head.biBitCount<=8){
- RGBQUAD* ppal=GetPalette();
- int32_t gray;
- //converts the colors to gray, use the blue channel only
- for(uint32_t i=0;i<head.biClrUsed;i++){
- gray=(int32_t)RGB2GRAY(ppal[i].rgbRed,ppal[i].rgbGreen,ppal[i].rgbBlue);
- ppal[i].rgbBlue = (uint8_t)gray;
- }
- // preserve transparency
- if (info.nBkgndIndex >= 0) info.nBkgndIndex = ppal[info.nBkgndIndex].rgbBlue;
- //create a "real" 8 bit gray scale image
- if (head.biBitCount==8){
- uint8_t *img=info.pImage;
- for(uint32_t i=0;i<head.biSizeImage;i++) img[i]=ppal[img[i]].rgbBlue;
- SetGrayPalette();
- }
- //transform to 8 bit gray scale
- if (head.biBitCount==4 || head.biBitCount==1){
- CxImage ima;
- ima.CopyInfo(*this);
- if (!ima.Create(head.biWidth,head.biHeight,8,info.dwType)) return false;
- ima.SetGrayPalette();
-#if CXIMAGE_SUPPORT_SELECTION
- ima.SelectionCopy(*this);
-#endif //CXIMAGE_SUPPORT_SELECTION
-#if CXIMAGE_SUPPORT_ALPHA
- ima.AlphaCopy(*this);
-#endif //CXIMAGE_SUPPORT_ALPHA
- for (int32_t y=0;y<head.biHeight;y++){
- uint8_t *iDst = ima.GetBits(y);
- uint8_t *iSrc = GetBits(y);
- for (int32_t x=0;x<head.biWidth; x++){
- //iDst[x]=ppal[BlindGetPixelIndex(x,y)].rgbBlue;
- if (head.biBitCount==4){
- uint8_t pos = (uint8_t)(4*(1-x%2));
- iDst[x]= ppal[(uint8_t)((iSrc[x >> 1]&((uint8_t)0x0F<<pos)) >> pos)].rgbBlue;
- } else {
- uint8_t pos = (uint8_t)(7-x%8);
- iDst[x]= ppal[(uint8_t)((iSrc[x >> 3]&((uint8_t)0x01<<pos)) >> pos)].rgbBlue;
- }
- }
- }
- Transfer(ima);
- }
- } else { //from RGB to 8 bit gray scale
- uint8_t *iSrc=info.pImage;
- CxImage ima;
- ima.CopyInfo(*this);
- if (!ima.Create(head.biWidth,head.biHeight,8,info.dwType)) return false;
- ima.SetGrayPalette();
- if (GetTransIndex()>=0){
- RGBQUAD c = GetTransColor();
- ima.SetTransIndex((uint8_t)RGB2GRAY(c.rgbRed,c.rgbGreen,c.rgbBlue));
- }
-#if CXIMAGE_SUPPORT_SELECTION
- ima.SelectionCopy(*this);
-#endif //CXIMAGE_SUPPORT_SELECTION
-#if CXIMAGE_SUPPORT_ALPHA
- ima.AlphaCopy(*this);
-#endif //CXIMAGE_SUPPORT_ALPHA
- uint8_t *img=ima.GetBits();
- int32_t l8=ima.GetEffWidth();
- int32_t l=head.biWidth * 3;
- for(int32_t y=0; y < head.biHeight; y++) {
- for(int32_t x=0,x8=0; x < l; x+=3,x8++) {
- img[x8+y*l8]=(uint8_t)RGB2GRAY(*(iSrc+x+2),*(iSrc+x+1),*(iSrc+x+0));
- }
- iSrc+=info.dwEffWidth;
- }
- Transfer(ima);
- }
- return true;
-}
-////////////////////////////////////////////////////////////////////////////////
-/**
- * \sa Mirror
- * \author [qhbo]
- */
-bool CxImage::Flip(bool bFlipSelection, bool bFlipAlpha)
-{
- if (!pDib) return false;
-
- uint8_t *buff = (uint8_t*)malloc(info.dwEffWidth);
- if (!buff) return false;
-
- uint8_t *iSrc,*iDst;
- iSrc = GetBits(head.biHeight-1);
- iDst = GetBits(0);
- for (int32_t i=0; i<(head.biHeight/2); ++i)
- {
- memcpy(buff, iSrc, info.dwEffWidth);
- memcpy(iSrc, iDst, info.dwEffWidth);
- memcpy(iDst, buff, info.dwEffWidth);
- iSrc-=info.dwEffWidth;
- iDst+=info.dwEffWidth;
- }
-
- free(buff);
-
- if (bFlipSelection){
-#if CXIMAGE_SUPPORT_SELECTION
- SelectionFlip();
-#endif //CXIMAGE_SUPPORT_SELECTION
- }
-
- if (bFlipAlpha){
-#if CXIMAGE_SUPPORT_ALPHA
- AlphaFlip();
-#endif //CXIMAGE_SUPPORT_ALPHA
- }
-
- return true;
-}
-////////////////////////////////////////////////////////////////////////////////
-/**
- * \sa Flip
- */
-bool CxImage::Mirror(bool bMirrorSelection, bool bMirrorAlpha)
-{
- if (!pDib) return false;
-
- CxImage* imatmp = new CxImage(*this,false,true,true);
- if (!imatmp) return false;
- if (!imatmp->IsValid()){
- delete imatmp;
- return false;
- }
-
- uint8_t *iSrc,*iDst;
- int32_t wdt=(head.biWidth-1) * (head.biBitCount==24 ? 3:1);
- iSrc=info.pImage + wdt;
- iDst=imatmp->info.pImage;
- int32_t x,y;
- switch (head.biBitCount){
- case 24:
- for(y=0; y < head.biHeight; y++){
- for(x=0; x <= wdt; x+=3){
- *(iDst+x)=*(iSrc-x);
- *(iDst+x+1)=*(iSrc-x+1);
- *(iDst+x+2)=*(iSrc-x+2);
- }
- iSrc+=info.dwEffWidth;
- iDst+=info.dwEffWidth;
- }
- break;
- case 8:
- for(y=0; y < head.biHeight; y++){
- for(x=0; x <= wdt; x++)
- *(iDst+x)=*(iSrc-x);
- iSrc+=info.dwEffWidth;
- iDst+=info.dwEffWidth;
- }
- break;
- default:
- for(y=0; y < head.biHeight; y++){
- for(x=0; x <= wdt; x++)
- imatmp->SetPixelIndex(x,y,GetPixelIndex(wdt-x,y));
- }
- }
-
- if (bMirrorSelection){
-#if CXIMAGE_SUPPORT_SELECTION
- imatmp->SelectionMirror();
-#endif //CXIMAGE_SUPPORT_SELECTION
- }
-
- if (bMirrorAlpha){
-#if CXIMAGE_SUPPORT_ALPHA
- imatmp->AlphaMirror();
-#endif //CXIMAGE_SUPPORT_ALPHA
- }
-
- Transfer(*imatmp);
- delete imatmp;
- return true;
-}
-
-////////////////////////////////////////////////////////////////////////////////
-#define RBLOCK 64
-
-////////////////////////////////////////////////////////////////////////////////
-bool CxImage::RotateLeft(CxImage* iDst)
-{
- if (!pDib) return false;
-
- int32_t newWidth = GetHeight();
- int32_t newHeight = GetWidth();
-
- CxImage imgDest;
- imgDest.CopyInfo(*this);
- imgDest.Create(newWidth,newHeight,GetBpp(),GetType());
- imgDest.SetPalette(GetPalette());
-
-#if CXIMAGE_SUPPORT_ALPHA
- if (AlphaIsValid()) imgDest.AlphaCreate();
-#endif
-
-#if CXIMAGE_SUPPORT_SELECTION
- if (SelectionIsValid()) imgDest.SelectionCreate();
-#endif
-
- int32_t x,x2,y,dlineup;
-
- // Speedy rotate for BW images <Robert Abram>
- if (head.biBitCount == 1) {
-
- uint8_t *sbits, *dbits, *dbitsmax, bitpos, *nrow,*srcdisp;
- ldiv_t div_r;
-
- uint8_t *bsrc = GetBits(), *bdest = imgDest.GetBits();
- dbitsmax = bdest + imgDest.head.biSizeImage - 1;
- dlineup = 8 * imgDest.info.dwEffWidth - imgDest.head.biWidth;
-
- imgDest.Clear(0);
- for (y = 0; y < head.biHeight; y++) {
- // Figure out the Column we are going to be copying to
- div_r = ldiv(y + dlineup, (int32_t)8);
- // set bit pos of src column byte
- bitpos = (uint8_t)(1 << div_r.rem);
- srcdisp = bsrc + y * info.dwEffWidth;
- for (x = 0; x < (int32_t)info.dwEffWidth; x++) {
- // Get Source Bits
- sbits = srcdisp + x;
- // Get destination column
- nrow = bdest + (x * 8) * imgDest.info.dwEffWidth + imgDest.info.dwEffWidth - 1 - div_r.quot;
- for (int32_t z = 0; z < 8; z++) {
- // Get Destination Byte
- dbits = nrow + z * imgDest.info.dwEffWidth;
- if ((dbits < bdest) || (dbits > dbitsmax)) break;
- if (*sbits & (128 >> z)) *dbits |= bitpos;
- }
- }
- }//for y
-
-#if CXIMAGE_SUPPORT_ALPHA
- if (AlphaIsValid()) {
- for (x = 0; x < newWidth; x++){
- x2=newWidth-x-1;
- for (y = 0; y < newHeight; y++){
- imgDest.AlphaSet(x,y,BlindAlphaGet(y, x2));
- }//for y
- }//for x
- }
-#endif //CXIMAGE_SUPPORT_ALPHA
-
-#if CXIMAGE_SUPPORT_SELECTION
- if (SelectionIsValid()) {
- imgDest.info.rSelectionBox.left = newWidth-info.rSelectionBox.top;
- imgDest.info.rSelectionBox.right = newWidth-info.rSelectionBox.bottom;
- imgDest.info.rSelectionBox.bottom = info.rSelectionBox.left;
- imgDest.info.rSelectionBox.top = info.rSelectionBox.right;
- for (x = 0; x < newWidth; x++){
- x2=newWidth-x-1;
- for (y = 0; y < newHeight; y++){
- imgDest.SelectionSet(x,y,BlindSelectionGet(y, x2));
- }//for y
- }//for x
- }
-#endif //CXIMAGE_SUPPORT_SELECTION
-
- } else {
- //anything other than BW:
- //bd, 10. 2004: This optimized version of rotation rotates image by smaller blocks. It is quite
- //a bit faster than obvious algorithm, because it produces much less CPU cache misses.
- //This optimization can be tuned by changing block size (RBLOCK). 96 is good value for current
- //CPUs (tested on Athlon XP and Celeron D). Larger value (if CPU has enough cache) will increase
- //speed somehow, but once you drop out of CPU's cache, things will slow down drastically.
- //For older CPUs with less cache, lower value would yield better results.
-
- uint8_t *srcPtr, *dstPtr; //source and destionation for 24-bit version
- int32_t xs, ys; //x-segment and y-segment
- for (xs = 0; xs < newWidth; xs+=RBLOCK) { //for all image blocks of RBLOCK*RBLOCK pixels
- for (ys = 0; ys < newHeight; ys+=RBLOCK) {
- if (head.biBitCount==24) {
- //RGB24 optimized pixel access:
- for (x = xs; x < min(newWidth, xs+RBLOCK); x++){ //do rotation
- info.nProgress = (int32_t)(100*x/newWidth);
- x2=newWidth-x-1;
- dstPtr = (uint8_t*) imgDest.BlindGetPixelPointer(x,ys);
- srcPtr = (uint8_t*) BlindGetPixelPointer(ys, x2);
- for (y = ys; y < min(newHeight, ys+RBLOCK); y++){
- //imgDest.SetPixelColor(x, y, GetPixelColor(y, x2));
- *(dstPtr) = *(srcPtr);
- *(dstPtr+1) = *(srcPtr+1);
- *(dstPtr+2) = *(srcPtr+2);
- srcPtr += 3;
- dstPtr += imgDest.info.dwEffWidth;
- }//for y
- }//for x
- } else {
- //anything else than 24bpp (and 1bpp): palette
- for (x = xs; x < min(newWidth, xs+RBLOCK); x++){
- info.nProgress = (int32_t)(100*x/newWidth); //<Anatoly Ivasyuk>
- x2=newWidth-x-1;
- for (y = ys; y < min(newHeight, ys+RBLOCK); y++){
- imgDest.SetPixelIndex(x, y, BlindGetPixelIndex(y, x2));
- }//for y
- }//for x
- }//if (version selection)
-#if CXIMAGE_SUPPORT_ALPHA
- if (AlphaIsValid()) {
- for (x = xs; x < min(newWidth, xs+RBLOCK); x++){
- x2=newWidth-x-1;
- for (y = ys; y < min(newHeight, ys+RBLOCK); y++){
- imgDest.AlphaSet(x,y,BlindAlphaGet(y, x2));
- }//for y
- }//for x
- }//if (alpha channel)
-#endif //CXIMAGE_SUPPORT_ALPHA
-
-#if CXIMAGE_SUPPORT_SELECTION
- if (SelectionIsValid()) {
- imgDest.info.rSelectionBox.left = newWidth-info.rSelectionBox.top;
- imgDest.info.rSelectionBox.right = newWidth-info.rSelectionBox.bottom;
- imgDest.info.rSelectionBox.bottom = info.rSelectionBox.left;
- imgDest.info.rSelectionBox.top = info.rSelectionBox.right;
- for (x = xs; x < min(newWidth, xs+RBLOCK); x++){
- x2=newWidth-x-1;
- for (y = ys; y < min(newHeight, ys+RBLOCK); y++){
- imgDest.SelectionSet(x,y,BlindSelectionGet(y, x2));
- }//for y
- }//for x
- }//if (selection)
-#endif //CXIMAGE_SUPPORT_SELECTION
- }//for ys
- }//for xs
- }//if
-
- //select the destination
- if (iDst) iDst->Transfer(imgDest);
- else Transfer(imgDest);
- return true;
-}
-
-////////////////////////////////////////////////////////////////////////////////
-bool CxImage::RotateRight(CxImage* iDst)
-{
- if (!pDib) return false;
-
- int32_t newWidth = GetHeight();
- int32_t newHeight = GetWidth();
-
- CxImage imgDest;
- imgDest.CopyInfo(*this);
- imgDest.Create(newWidth,newHeight,GetBpp(),GetType());
- imgDest.SetPalette(GetPalette());
-
-#if CXIMAGE_SUPPORT_ALPHA
- if (AlphaIsValid()) imgDest.AlphaCreate();
-#endif
-
-#if CXIMAGE_SUPPORT_SELECTION
- if (SelectionIsValid()) imgDest.SelectionCreate();
-#endif
-
- int32_t x,y,y2;
- // Speedy rotate for BW images <Robert Abram>
- if (head.biBitCount == 1) {
-
- uint8_t *sbits, *dbits, *dbitsmax, bitpos, *nrow,*srcdisp;
- ldiv_t div_r;
-
- uint8_t *bsrc = GetBits(), *bdest = imgDest.GetBits();
- dbitsmax = bdest + imgDest.head.biSizeImage - 1;
-
- imgDest.Clear(0);
- for (y = 0; y < head.biHeight; y++) {
- // Figure out the Column we are going to be copying to
- div_r = ldiv(y, (int32_t)8);
- // set bit pos of src column byte
- bitpos = (uint8_t)(128 >> div_r.rem);
- srcdisp = bsrc + y * info.dwEffWidth;
- for (x = 0; x < (int32_t)info.dwEffWidth; x++) {
- // Get Source Bits
- sbits = srcdisp + x;
- // Get destination column
- nrow = bdest + (imgDest.head.biHeight-1-(x*8)) * imgDest.info.dwEffWidth + div_r.quot;
- for (int32_t z = 0; z < 8; z++) {
- // Get Destination Byte
- dbits = nrow - z * imgDest.info.dwEffWidth;
- if ((dbits < bdest) || (dbits > dbitsmax)) break;
- if (*sbits & (128 >> z)) *dbits |= bitpos;
- }
- }
- }
-
-#if CXIMAGE_SUPPORT_ALPHA
- if (AlphaIsValid()){
- for (y = 0; y < newHeight; y++){
- y2=newHeight-y-1;
- for (x = 0; x < newWidth; x++){
- imgDest.AlphaSet(x,y,BlindAlphaGet(y2, x));
- }
- }
- }
-#endif //CXIMAGE_SUPPORT_ALPHA
-
-#if CXIMAGE_SUPPORT_SELECTION
- if (SelectionIsValid()){
- imgDest.info.rSelectionBox.left = info.rSelectionBox.bottom;
- imgDest.info.rSelectionBox.right = info.rSelectionBox.top;
- imgDest.info.rSelectionBox.bottom = newHeight-info.rSelectionBox.right;
- imgDest.info.rSelectionBox.top = newHeight-info.rSelectionBox.left;
- for (y = 0; y < newHeight; y++){
- y2=newHeight-y-1;
- for (x = 0; x < newWidth; x++){
- imgDest.SelectionSet(x,y,BlindSelectionGet(y2, x));
- }
- }
- }
-#endif //CXIMAGE_SUPPORT_SELECTION
-
- } else {
- //anything else but BW
- uint8_t *srcPtr, *dstPtr; //source and destionation for 24-bit version
- int32_t xs, ys; //x-segment and y-segment
- for (xs = 0; xs < newWidth; xs+=RBLOCK) {
- for (ys = 0; ys < newHeight; ys+=RBLOCK) {
- if (head.biBitCount==24) {
- //RGB24 optimized pixel access:
- for (y = ys; y < min(newHeight, ys+RBLOCK); y++){
- info.nProgress = (int32_t)(100*y/newHeight); //<Anatoly Ivasyuk>
- y2=newHeight-y-1;
- dstPtr = (uint8_t*) imgDest.BlindGetPixelPointer(xs,y);
- srcPtr = (uint8_t*) BlindGetPixelPointer(y2, xs);
- for (x = xs; x < min(newWidth, xs+RBLOCK); x++){
- //imgDest.SetPixelColor(x, y, GetPixelColor(y2, x));
- *(dstPtr) = *(srcPtr);
- *(dstPtr+1) = *(srcPtr+1);
- *(dstPtr+2) = *(srcPtr+2);
- dstPtr += 3;
- srcPtr += info.dwEffWidth;
- }//for x
- }//for y
- } else {
- //anything else than BW & RGB24: palette
- for (y = ys; y < min(newHeight, ys+RBLOCK); y++){
- info.nProgress = (int32_t)(100*y/newHeight); //<Anatoly Ivasyuk>
- y2=newHeight-y-1;
- for (x = xs; x < min(newWidth, xs+RBLOCK); x++){
- imgDest.SetPixelIndex(x, y, BlindGetPixelIndex(y2, x));
- }//for x
- }//for y
- }//if
-#if CXIMAGE_SUPPORT_ALPHA
- if (AlphaIsValid()){
- for (y = ys; y < min(newHeight, ys+RBLOCK); y++){
- y2=newHeight-y-1;
- for (x = xs; x < min(newWidth, xs+RBLOCK); x++){
- imgDest.AlphaSet(x,y,BlindAlphaGet(y2, x));
- }//for x
- }//for y
- }//if (has alpha)
-#endif //CXIMAGE_SUPPORT_ALPHA
-
-#if CXIMAGE_SUPPORT_SELECTION
- if (SelectionIsValid()){
- imgDest.info.rSelectionBox.left = info.rSelectionBox.bottom;
- imgDest.info.rSelectionBox.right = info.rSelectionBox.top;
- imgDest.info.rSelectionBox.bottom = newHeight-info.rSelectionBox.right;
- imgDest.info.rSelectionBox.top = newHeight-info.rSelectionBox.left;
- for (y = ys; y < min(newHeight, ys+RBLOCK); y++){
- y2=newHeight-y-1;
- for (x = xs; x < min(newWidth, xs+RBLOCK); x++){
- imgDest.SelectionSet(x,y,BlindSelectionGet(y2, x));
- }//for x
- }//for y
- }//if (has alpha)
-#endif //CXIMAGE_SUPPORT_SELECTION
- }//for ys
- }//for xs
- }//if
-
- //select the destination
- if (iDst) iDst->Transfer(imgDest);
- else Transfer(imgDest);
- return true;
-}
-
-////////////////////////////////////////////////////////////////////////////////
-bool CxImage::Negative()
-{
- if (!pDib) return false;
-
- if (head.biBitCount<=8){
- if (IsGrayScale()){ //GRAYSCALE, selection
- if (pSelection){
- for(int32_t y=info.rSelectionBox.bottom; y<info.rSelectionBox.top; y++){
- for(int32_t x=info.rSelectionBox.left; x<info.rSelectionBox.right; x++){
-#if CXIMAGE_SUPPORT_SELECTION
- if (BlindSelectionIsInside(x,y))
-#endif //CXIMAGE_SUPPORT_SELECTION
- {
- BlindSetPixelIndex(x,y,(uint8_t)(255-BlindGetPixelIndex(x,y)));
- }
- }
- }
- } else {
- uint8_t *iSrc=info.pImage;
- for(uint32_t i=0; i < head.biSizeImage; i++){
- *iSrc=(uint8_t)~(*(iSrc));
- iSrc++;
- }
- }
- } else { //PALETTE, full image
- RGBQUAD* ppal=GetPalette();
- for(uint32_t i=0;i<head.biClrUsed;i++){
- ppal[i].rgbBlue =(uint8_t)(255-ppal[i].rgbBlue);
- ppal[i].rgbGreen =(uint8_t)(255-ppal[i].rgbGreen);
- ppal[i].rgbRed =(uint8_t)(255-ppal[i].rgbRed);
- }
- }
- } else {
- if (pSelection==NULL){ //RGB, full image
- uint8_t *iSrc=info.pImage;
- for(uint32_t i=0; i < head.biSizeImage; i++){
- *iSrc=(uint8_t)~(*(iSrc));
- iSrc++;
- }
- } else { // RGB with selection
- RGBQUAD color;
- for(int32_t y=info.rSelectionBox.bottom; y<info.rSelectionBox.top; y++){
- for(int32_t x=info.rSelectionBox.left; x<info.rSelectionBox.right; x++){
-#if CXIMAGE_SUPPORT_SELECTION
- if (BlindSelectionIsInside(x,y))
-#endif //CXIMAGE_SUPPORT_SELECTION
- {
- color = BlindGetPixelColor(x,y);
- color.rgbRed = (uint8_t)(255-color.rgbRed);
- color.rgbGreen = (uint8_t)(255-color.rgbGreen);
- color.rgbBlue = (uint8_t)(255-color.rgbBlue);
- BlindSetPixelColor(x,y,color);
- }
- }
- }
- }
- //<DP> invert transparent color too
- info.nBkgndColor.rgbBlue = (uint8_t)(255-info.nBkgndColor.rgbBlue);
- info.nBkgndColor.rgbGreen = (uint8_t)(255-info.nBkgndColor.rgbGreen);
- info.nBkgndColor.rgbRed = (uint8_t)(255-info.nBkgndColor.rgbRed);
- }
- return true;
-}
-
-////////////////////////////////////////////////////////////////////////////////
-#endif //CXIMAGE_SUPPORT_BASICTRANSFORMATIONS
-////////////////////////////////////////////////////////////////////////////////
-#if CXIMAGE_SUPPORT_TRANSFORMATION
-////////////////////////////////////////////////////////////////////////////////
-
-////////////////////////////////////////////////////////////////////////////////
-#if CXIMAGE_SUPPORT_EXIF
-bool CxImage::RotateExif(int32_t orientation /* = 0 */)
-{
- bool ret = true;
- if (orientation <= 0)
- orientation = info.ExifInfo.Orientation;
- if (orientation == 3)
- ret = Rotate180();
- else if (orientation == 6)
- ret = RotateRight();
- else if (orientation == 8)
- ret = RotateLeft();
- else if (orientation == 5)
- ret = RotateLeft();
-
- info.ExifInfo.Orientation = 1;
- return ret;
-}
-#endif //CXIMAGE_SUPPORT_EXIF
-
-////////////////////////////////////////////////////////////////////////////////
-bool CxImage::Rotate(float angle, CxImage* iDst)
-{
- if (!pDib) return false;
-
- if (fmod(angle,180.0f)==0.0f && fmod(angle,360.0f)!=0.0f)
- return Rotate180(iDst);
-
- // Copyright (c) 1996-1998 Ulrich von Zadow
-
- // Negative the angle, because the y-axis is negative.
- double ang = -angle*acos((float)0)/90;
- int32_t newWidth, newHeight;
- int32_t nWidth = GetWidth();
- int32_t nHeight= GetHeight();
- double cos_angle = cos(ang);
- double sin_angle = sin(ang);
-
- // Calculate the size of the new bitmap
- POINT p1={0,0};
- POINT p2={nWidth,0};
- POINT p3={0,nHeight};
- POINT p4={nWidth,nHeight};
- CxPoint2 newP1,newP2,newP3,newP4, leftTop, rightTop, leftBottom, rightBottom;
-
- newP1.x = (float)p1.x;
- newP1.y = (float)p1.y;
- newP2.x = (float)(p2.x*cos_angle - p2.y*sin_angle);
- newP2.y = (float)(p2.x*sin_angle + p2.y*cos_angle);
- newP3.x = (float)(p3.x*cos_angle - p3.y*sin_angle);
- newP3.y = (float)(p3.x*sin_angle + p3.y*cos_angle);
- newP4.x = (float)(p4.x*cos_angle - p4.y*sin_angle);
- newP4.y = (float)(p4.x*sin_angle + p4.y*cos_angle);
-
- leftTop.x = min(min(newP1.x,newP2.x),min(newP3.x,newP4.x));
- leftTop.y = min(min(newP1.y,newP2.y),min(newP3.y,newP4.y));
- rightBottom.x = max(max(newP1.x,newP2.x),max(newP3.x,newP4.x));
- rightBottom.y = max(max(newP1.y,newP2.y),max(newP3.y,newP4.y));
- leftBottom.x = leftTop.x;
- leftBottom.y = rightBottom.y;
- rightTop.x = rightBottom.x;
- rightTop.y = leftTop.y;
-
- newWidth = (int32_t) floor(0.5f + rightTop.x - leftTop.x);
- newHeight= (int32_t) floor(0.5f + leftBottom.y - leftTop.y);
- CxImage imgDest;
- imgDest.CopyInfo(*this);
- imgDest.Create(newWidth,newHeight,GetBpp(),GetType());
- imgDest.SetPalette(GetPalette());
-
-#if CXIMAGE_SUPPORT_ALPHA
- if(AlphaIsValid()) //MTA: Fix for rotation problem when the image has an alpha channel
- {
- imgDest.AlphaCreate();
- imgDest.AlphaClear();
- }
-#endif //CXIMAGE_SUPPORT_ALPHA
-
- int32_t x,y,newX,newY,oldX,oldY;
-
- if (head.biClrUsed==0){ //RGB
- for (y = (int32_t)leftTop.y, newY = 0; y<=(int32_t)leftBottom.y; y++,newY++){
- info.nProgress = (int32_t)(100*newY/newHeight);
- if (info.nEscape) break;
- for (x = (int32_t)leftTop.x, newX = 0; x<=(int32_t)rightTop.x; x++,newX++){
- oldX = (int32_t)(x*cos_angle + y*sin_angle + 0.5);
- oldY = (int32_t)(y*cos_angle - x*sin_angle + 0.5);
- imgDest.SetPixelColor(newX,newY,GetPixelColor(oldX,oldY));
-#if CXIMAGE_SUPPORT_ALPHA
- imgDest.AlphaSet(newX,newY,AlphaGet(oldX,oldY)); //MTA: copy the alpha value
-#endif //CXIMAGE_SUPPORT_ALPHA
- }
- }
- } else { //PALETTE
- for (y = (int32_t)leftTop.y, newY = 0; y<=(int32_t)leftBottom.y; y++,newY++){
- info.nProgress = (int32_t)(100*newY/newHeight);
- if (info.nEscape) break;
- for (x = (int32_t)leftTop.x, newX = 0; x<=(int32_t)rightTop.x; x++,newX++){
- oldX = (int32_t)(x*cos_angle + y*sin_angle + 0.5);
- oldY = (int32_t)(y*cos_angle - x*sin_angle + 0.5);
- imgDest.SetPixelIndex(newX,newY,GetPixelIndex(oldX,oldY));
-#if CXIMAGE_SUPPORT_ALPHA
- imgDest.AlphaSet(newX,newY,AlphaGet(oldX,oldY)); //MTA: copy the alpha value
-#endif //CXIMAGE_SUPPORT_ALPHA
- }
- }
- }
- //select the destination
- if (iDst) iDst->Transfer(imgDest);
- else Transfer(imgDest);
-
- return true;
-}
-////////////////////////////////////////////////////////////////////////////////
-/**
- * Rotates image around it's center.
- * Method can use interpolation with paletted images, but does not change pallete, so results vary.
- * (If you have only four colours in a palette, there's not much room for interpolation.)
- *
- * \param angle - angle in degrees (positive values rotate clockwise)
- * \param *iDst - destination image (if null, this image is changed)
- * \param inMethod - interpolation method used
- * (IM_NEAREST_NEIGHBOUR produces aliasing (fast), IM_BILINEAR softens picture a bit (slower)
- * IM_SHARPBICUBIC is slower and produces some halos...)
- * \param ofMethod - overflow method (how to choose colour of pixels that have no source)
- * \param replColor - replacement colour to use (OM_COLOR, OM_BACKGROUND with no background colour...)
- * \param optimizeRightAngles - call faster methods for 90, 180, and 270 degree rotations. Faster methods
- * are called for angles, where error (in location of corner pixels) is less
- * than 0.25 pixels.
- * \param bKeepOriginalSize - rotates the image without resizing.
- *
- * \author ***bd*** 2.2004
- */
-bool CxImage::Rotate2(float angle,
- CxImage *iDst,
- InterpolationMethod inMethod,
- OverflowMethod ofMethod,
- RGBQUAD *replColor,
- bool const optimizeRightAngles,
- bool const bKeepOriginalSize)
-{
- if (!pDib) return false; //no dib no go
-
- if (fmod(angle,180.0f)==0.0f && fmod(angle,360.0f)!=0.0f)
- return Rotate180(iDst);
-
- double ang = -angle*acos(0.0f)/90.0f; //convert angle to radians and invert (positive angle performs clockwise rotation)
- float cos_angle = (float) cos(ang); //these two are needed later (to rotate)
- float sin_angle = (float) sin(ang);
-
- //Calculate the size of the new bitmap (rotate corners of image)
- CxPoint2 p[4]; //original corners of the image
- p[0]=CxPoint2(-0.5f,-0.5f);
- p[1]=CxPoint2(GetWidth()-0.5f,-0.5f);
- p[2]=CxPoint2(-0.5f,GetHeight()-0.5f);
- p[3]=CxPoint2(GetWidth()-0.5f,GetHeight()-0.5f);
- CxPoint2 newp[4]; //rotated positions of corners
- //(rotate corners)
- if (bKeepOriginalSize){
- for (int32_t i=0; i<4; i++) {
- newp[i].x = p[i].x;
- newp[i].y = p[i].y;
- }//for
- } else {
- for (int32_t i=0; i<4; i++) {
- newp[i].x = (p[i].x*cos_angle - p[i].y*sin_angle);
- newp[i].y = (p[i].x*sin_angle + p[i].y*cos_angle);
- }//for i
-
- if (optimizeRightAngles) {
- //For rotations of 90, -90 or 180 or 0 degrees, call faster routines
- if (newp[3].Distance(CxPoint2(GetHeight()-0.5f, 0.5f-GetWidth())) < 0.25)
- //rotation right for circa 90 degrees (diagonal pixels less than 0.25 pixel away from 90 degree rotation destination)
- return RotateRight(iDst);
- if (newp[3].Distance(CxPoint2(0.5f-GetHeight(), -0.5f+GetWidth())) < 0.25)
- //rotation left for ~90 degrees
- return RotateLeft(iDst);
- if (newp[3].Distance(CxPoint2(0.5f-GetWidth(), 0.5f-GetHeight())) < 0.25)
- //rotation left for ~180 degrees
- return Rotate180(iDst);
- if (newp[3].Distance(p[3]) < 0.25) {
- //rotation not significant
- if (iDst) iDst->Copy(*this); //copy image to iDst, if required
- return true; //and we're done
- }//if
- }//if
- }//if
-
- //(read new dimensions from location of corners)
- float minx = (float) min(min(newp[0].x,newp[1].x),min(newp[2].x,newp[3].x));
- float miny = (float) min(min(newp[0].y,newp[1].y),min(newp[2].y,newp[3].y));
- float maxx = (float) max(max(newp[0].x,newp[1].x),max(newp[2].x,newp[3].x));
- float maxy = (float) max(max(newp[0].y,newp[1].y),max(newp[2].y,newp[3].y));
- int32_t newWidth = (int32_t) floor(maxx-minx+0.5f);
- int32_t newHeight= (int32_t) floor(maxy-miny+0.5f);
- float ssx=((maxx+minx)- ((float) newWidth-1))/2.0f; //start for x
- float ssy=((maxy+miny)- ((float) newHeight-1))/2.0f; //start for y
-
- float newxcenteroffset = 0.5f * newWidth;
- float newycenteroffset = 0.5f * newHeight;
- if (bKeepOriginalSize){
- ssx -= 0.5f * GetWidth();
- ssy -= 0.5f * GetHeight();
- }
-
- //create destination image
- CxImage imgDest;
- imgDest.CopyInfo(*this);
- imgDest.Create(newWidth,newHeight,GetBpp(),GetType());
- imgDest.SetPalette(GetPalette());
-#if CXIMAGE_SUPPORT_ALPHA
- if(AlphaIsValid()) imgDest.AlphaCreate(); //MTA: Fix for rotation problem when the image has an alpha channel
-#endif //CXIMAGE_SUPPORT_ALPHA
-
- RGBQUAD rgb; //pixel colour
- RGBQUAD rc;
- if (replColor!=0)
- rc=*replColor;
- else {
- rc.rgbRed=255; rc.rgbGreen=255; rc.rgbBlue=255; rc.rgbReserved=0;
- }//if
- float x,y; //destination location (float, with proper offset)
- float origx, origy; //origin location
- int32_t destx, desty; //destination location
-
- y=ssy; //initialize y
- if (!IsIndexed()){ //RGB24
- //optimized RGB24 implementation (direct write to destination):
- uint8_t *pxptr;
-#if CXIMAGE_SUPPORT_ALPHA
- uint8_t *pxptra=0;
-#endif //CXIMAGE_SUPPORT_ALPHA
- for (desty=0; desty<newHeight; desty++) {
- info.nProgress = (int32_t)(100*desty/newHeight);
- if (info.nEscape) break;
- //initialize x
- x=ssx;
- //calculate pointer to first byte in row
- pxptr=(uint8_t *)imgDest.BlindGetPixelPointer(0, desty);
-#if CXIMAGE_SUPPORT_ALPHA
- //calculate pointer to first byte in row
- if (AlphaIsValid()) pxptra=imgDest.AlphaGetPointer(0, desty);
-#endif //CXIMAGE_SUPPORT_ALPHA
- for (destx=0; destx<newWidth; destx++) {
- //get source pixel coordinate for current destination point
- //origx = (cos_angle*(x-head.biWidth/2)+sin_angle*(y-head.biHeight/2))+newWidth/2;
- //origy = (cos_angle*(y-head.biHeight/2)-sin_angle*(x-head.biWidth/2))+newHeight/2;
- origx = cos_angle*x+sin_angle*y;
- origy = cos_angle*y-sin_angle*x;
- if (bKeepOriginalSize){
- origx += newxcenteroffset;
- origy += newycenteroffset;
- }
- rgb = GetPixelColorInterpolated(origx, origy, inMethod, ofMethod, &rc); //get interpolated colour value
- //copy alpha and colour value to destination
-#if CXIMAGE_SUPPORT_ALPHA
- if (pxptra) *pxptra++ = rgb.rgbReserved;
-#endif //CXIMAGE_SUPPORT_ALPHA
- *pxptr++ = rgb.rgbBlue;
- *pxptr++ = rgb.rgbGreen;
- *pxptr++ = rgb.rgbRed;
- x++;
- }//for destx
- y++;
- }//for desty
- } else {
- //non-optimized implementation for paletted images
- for (desty=0; desty<newHeight; desty++) {
- info.nProgress = (int32_t)(100*desty/newHeight);
- if (info.nEscape) break;
- x=ssx;
- for (destx=0; destx<newWidth; destx++) {
- //get source pixel coordinate for current destination point
- origx=(cos_angle*x+sin_angle*y);
- origy=(cos_angle*y-sin_angle*x);
- if (bKeepOriginalSize){
- origx += newxcenteroffset;
- origy += newycenteroffset;
- }
- rgb = GetPixelColorInterpolated(origx, origy, inMethod, ofMethod, &rc);
- //***!*** SetPixelColor is slow for palleted images
-#if CXIMAGE_SUPPORT_ALPHA
- if (AlphaIsValid())
- imgDest.SetPixelColor(destx,desty,rgb,true);
- else
-#endif //CXIMAGE_SUPPORT_ALPHA
- imgDest.SetPixelColor(destx,desty,rgb,false);
- x++;
- }//for destx
- y++;
- }//for desty
- }
- //select the destination
-
- if (iDst) iDst->Transfer(imgDest);
- else Transfer(imgDest);
-
- return true;
-}
-////////////////////////////////////////////////////////////////////////////////
-bool CxImage::Rotate180(CxImage* iDst)
-{
- if (!pDib) return false;
-
- int32_t wid = GetWidth();
- int32_t ht = GetHeight();
-
- CxImage imgDest;
- imgDest.CopyInfo(*this);
- imgDest.Create(wid,ht,GetBpp(),GetType());
- imgDest.SetPalette(GetPalette());
-
-#if CXIMAGE_SUPPORT_ALPHA
- if (AlphaIsValid()) imgDest.AlphaCreate();
-#endif //CXIMAGE_SUPPORT_ALPHA
-
- int32_t x,y,y2;
- for (y = 0; y < ht; y++){
- info.nProgress = (int32_t)(100*y/ht); //<Anatoly Ivasyuk>
- y2=ht-y-1;
- for (x = 0; x < wid; x++){
- if(head.biClrUsed==0)//RGB
- imgDest.SetPixelColor(wid-x-1, y2, BlindGetPixelColor(x, y));
- else //PALETTE
- imgDest.SetPixelIndex(wid-x-1, y2, BlindGetPixelIndex(x, y));
-
-#if CXIMAGE_SUPPORT_ALPHA
- if (AlphaIsValid()) imgDest.AlphaSet(wid-x-1, y2,BlindAlphaGet(x, y));
-#endif //CXIMAGE_SUPPORT_ALPHA
-
- }
- }
-
- //select the destination
- if (iDst) iDst->Transfer(imgDest);
- else Transfer(imgDest);
- return true;
-}
-
-////////////////////////////////////////////////////////////////////////////////
-/**
- * Resizes the image. mode can be 0 for slow (bilinear) method ,
- * 1 for fast (nearest pixel) method, or 2 for accurate (bicubic spline interpolation) method.
- * The function is faster with 24 and 1 bpp images, slow for 4 bpp images and slowest for 8 bpp images.
- */
-bool CxImage::Resample(int32_t newx, int32_t newy, int32_t mode, CxImage* iDst)
-{
- if (newx==0 || newy==0) return false;
-
- if (head.biWidth==newx && head.biHeight==newy){
- if (iDst) iDst->Copy(*this);
- return true;
- }
-
- float xScale, yScale, fX, fY;
- xScale = (float)head.biWidth / (float)newx;
- yScale = (float)head.biHeight / (float)newy;
-
- CxImage newImage;
- newImage.CopyInfo(*this);
- newImage.Create(newx,newy,head.biBitCount,GetType());
- newImage.SetPalette(GetPalette());
- if (!newImage.IsValid()){
- strcpy(info.szLastError,newImage.GetLastError());
- return false;
- }
-
- switch (mode) {
- case 1: // nearest pixel
- {
- for(int32_t y=0; y<newy; y++){
- info.nProgress = (int32_t)(100*y/newy);
- if (info.nEscape) break;
- fY = y * yScale;
- for(int32_t x=0; x<newx; x++){
- fX = x * xScale;
- newImage.SetPixelColor(x,y,GetPixelColor((int32_t)fX,(int32_t)fY));
- }
- }
- break;
- }
- case 2: // bicubic interpolation by Blake L. Carlson <blake-carlson(at)uiowa(dot)edu
- {
- float f_x, f_y, a, b, rr, gg, bb, r1, r2;
- int32_t i_x, i_y, xx, yy;
- RGBQUAD rgb;
- uint8_t* iDst;
- for(int32_t y=0; y<newy; y++){
- info.nProgress = (int32_t)(100*y/newy);
- if (info.nEscape) break;
- f_y = (float) y * yScale - 0.5f;
- i_y = (int32_t) floor(f_y);
- a = f_y - (float)floor(f_y);
- for(int32_t x=0; x<newx; x++){
- f_x = (float) x * xScale - 0.5f;
- i_x = (int32_t) floor(f_x);
- b = f_x - (float)floor(f_x);
-
- rr = gg = bb = 0.0f;
- for(int32_t m=-1; m<3; m++) {
- r1 = KernelBSpline((float) m - a);
- yy = i_y+m;
- if (yy<0) yy=0;
- if (yy>=head.biHeight) yy = head.biHeight-1;
- for(int32_t n=-1; n<3; n++) {
- r2 = r1 * KernelBSpline(b - (float)n);
- xx = i_x+n;
- if (xx<0) xx=0;
- if (xx>=head.biWidth) xx=head.biWidth-1;
-
- if (head.biClrUsed){
- rgb = GetPixelColor(xx,yy);
- } else {
- iDst = info.pImage + yy*info.dwEffWidth + xx*3;
- rgb.rgbBlue = *iDst++;
- rgb.rgbGreen= *iDst++;
- rgb.rgbRed = *iDst;
- }
-
- rr += rgb.rgbRed * r2;
- gg += rgb.rgbGreen * r2;
- bb += rgb.rgbBlue * r2;
- }
- }
-
- if (head.biClrUsed)
- newImage.SetPixelColor(x,y,RGB(rr,gg,bb));
- else {
- iDst = newImage.info.pImage + y*newImage.info.dwEffWidth + x*3;
- *iDst++ = (uint8_t)bb;
- *iDst++ = (uint8_t)gg;
- *iDst = (uint8_t)rr;
- }
-
- }
- }
- break;
- }
- default: // bilinear interpolation
- if (!(head.biWidth>newx && head.biHeight>newy && head.biBitCount==24)) {
- // (c) 1999 Steve McMahon (steve@dogma.demon.co.uk)
- int32_t ifX, ifY, ifX1, ifY1, xmax, ymax;
- float ir1, ir2, ig1, ig2, ib1, ib2, dx, dy;
- uint8_t r,g,b;
- RGBQUAD rgb1, rgb2, rgb3, rgb4;
- xmax = head.biWidth-1;
- ymax = head.biHeight-1;
- for(int32_t y=0; y<newy; y++){
- info.nProgress = (int32_t)(100*y/newy);
- if (info.nEscape) break;
- fY = y * yScale;
- ifY = (int32_t)fY;
- ifY1 = min(ymax, ifY+1);
- dy = fY - ifY;
- for(int32_t x=0; x<newx; x++){
- fX = x * xScale;
- ifX = (int32_t)fX;
- ifX1 = min(xmax, ifX+1);
- dx = fX - ifX;
- // Interpolate using the four nearest pixels in the source
- if (head.biClrUsed){
- rgb1=GetPaletteColor(GetPixelIndex(ifX,ifY));
- rgb2=GetPaletteColor(GetPixelIndex(ifX1,ifY));
- rgb3=GetPaletteColor(GetPixelIndex(ifX,ifY1));
- rgb4=GetPaletteColor(GetPixelIndex(ifX1,ifY1));
- }
- else {
- uint8_t* iDst;
- iDst = info.pImage + ifY*info.dwEffWidth + ifX*3;
- rgb1.rgbBlue = *iDst++; rgb1.rgbGreen= *iDst++; rgb1.rgbRed =*iDst;
- iDst = info.pImage + ifY*info.dwEffWidth + ifX1*3;
- rgb2.rgbBlue = *iDst++; rgb2.rgbGreen= *iDst++; rgb2.rgbRed =*iDst;
- iDst = info.pImage + ifY1*info.dwEffWidth + ifX*3;
- rgb3.rgbBlue = *iDst++; rgb3.rgbGreen= *iDst++; rgb3.rgbRed =*iDst;
- iDst = info.pImage + ifY1*info.dwEffWidth + ifX1*3;
- rgb4.rgbBlue = *iDst++; rgb4.rgbGreen= *iDst++; rgb4.rgbRed =*iDst;
- }
- // Interplate in x direction:
- ir1 = rgb1.rgbRed + (rgb3.rgbRed - rgb1.rgbRed) * dy;
- ig1 = rgb1.rgbGreen + (rgb3.rgbGreen - rgb1.rgbGreen) * dy;
- ib1 = rgb1.rgbBlue + (rgb3.rgbBlue - rgb1.rgbBlue) * dy;
- ir2 = rgb2.rgbRed + (rgb4.rgbRed - rgb2.rgbRed) * dy;
- ig2 = rgb2.rgbGreen + (rgb4.rgbGreen - rgb2.rgbGreen) * dy;
- ib2 = rgb2.rgbBlue + (rgb4.rgbBlue - rgb2.rgbBlue) * dy;
- // Interpolate in y:
- r = (uint8_t)(ir1 + (ir2-ir1) * dx);
- g = (uint8_t)(ig1 + (ig2-ig1) * dx);
- b = (uint8_t)(ib1 + (ib2-ib1) * dx);
- // Set output
- newImage.SetPixelColor(x,y,RGB(r,g,b));
- }
- }
- } else {
- //high resolution shrink, thanks to Henrik Stellmann <henrik.stellmann@volleynet.de>
- const int32_t ACCURACY = 1000;
- int32_t i,j; // index for faValue
- int32_t x,y; // coordinates in source image
- uint8_t* pSource;
- uint8_t* pDest = newImage.info.pImage;
- int32_t* naAccu = new int32_t[3 * newx + 3];
- int32_t* naCarry = new int32_t[3 * newx + 3];
- int32_t* naTemp;
- int32_t nWeightX,nWeightY;
- float fEndX;
- int32_t nScale = (int32_t)(ACCURACY * xScale * yScale);
-
- memset(naAccu, 0, sizeof(int32_t) * 3 * newx);
- memset(naCarry, 0, sizeof(int32_t) * 3 * newx);
-
- int32_t u, v = 0; // coordinates in dest image
- float fEndY = yScale - 1.0f;
- for (y = 0; y < head.biHeight; y++){
- info.nProgress = (int32_t)(100*y/head.biHeight); //<Anatoly Ivasyuk>
- if (info.nEscape) break;
- pSource = info.pImage + y * info.dwEffWidth;
- u = i = 0;
- fEndX = xScale - 1.0f;
- if ((float)y < fEndY) { // complete source row goes into dest row
- for (x = 0; x < head.biWidth; x++){
- if ((float)x < fEndX){ // complete source pixel goes into dest pixel
- for (j = 0; j < 3; j++) naAccu[i + j] += (*pSource++) * ACCURACY;
- } else { // source pixel is splitted for 2 dest pixels
- nWeightX = (int32_t)(((float)x - fEndX) * ACCURACY);
- for (j = 0; j < 3; j++){
- naAccu[i] += (ACCURACY - nWeightX) * (*pSource);
- naAccu[3 + i++] += nWeightX * (*pSource++);
- }
- fEndX += xScale;
- u++;
- }
- }
- } else { // source row is splitted for 2 dest rows
- nWeightY = (int32_t)(((float)y - fEndY) * ACCURACY);
- for (x = 0; x < head.biWidth; x++){
- if ((float)x < fEndX){ // complete source pixel goes into 2 pixel
- for (j = 0; j < 3; j++){
- naAccu[i + j] += ((ACCURACY - nWeightY) * (*pSource));
- naCarry[i + j] += nWeightY * (*pSource++);
- }
- } else { // source pixel is splitted for 4 dest pixels
- nWeightX = (int32_t)(((float)x - fEndX) * ACCURACY);
- for (j = 0; j < 3; j++) {
- naAccu[i] += ((ACCURACY - nWeightY) * (ACCURACY - nWeightX)) * (*pSource) / ACCURACY;
- *pDest++ = (uint8_t)(naAccu[i] / nScale);
- naCarry[i] += (nWeightY * (ACCURACY - nWeightX) * (*pSource)) / ACCURACY;
- naAccu[i + 3] += ((ACCURACY - nWeightY) * nWeightX * (*pSource)) / ACCURACY;
- naCarry[i + 3] = (nWeightY * nWeightX * (*pSource)) / ACCURACY;
- i++;
- pSource++;
- }
- fEndX += xScale;
- u++;
- }
- }
- if (u < newx){ // possibly not completed due to rounding errors
- for (j = 0; j < 3; j++) *pDest++ = (uint8_t)(naAccu[i++] / nScale);
- }
- naTemp = naCarry;
- naCarry = naAccu;
- naAccu = naTemp;
- memset(naCarry, 0, sizeof(int32_t) * 3); // need only to set first pixel zero
- pDest = newImage.info.pImage + (++v * newImage.info.dwEffWidth);
- fEndY += yScale;
- }
- }
- if (v < newy){ // possibly not completed due to rounding errors
- for (i = 0; i < 3 * newx; i++) *pDest++ = (uint8_t)(naAccu[i] / nScale);
- }
- delete [] naAccu;
- delete [] naCarry;
- }
- }
-
-#if CXIMAGE_SUPPORT_ALPHA
- if (AlphaIsValid()){
- if (1 == mode){
- newImage.AlphaCreate();
- for(int32_t y=0; y<newy; y++){
- fY = y * yScale;
- for(int32_t x=0; x<newx; x++){
- fX = x * xScale;
- newImage.AlphaSet(x,y,AlphaGet((int32_t)fX,(int32_t)fY));
- }
- }
- } else {
- CxImage newAlpha;
- AlphaSplit(&newAlpha);
- newAlpha.Resample(newx, newy, mode);
- newImage.AlphaSet(newAlpha);
- }
- }
-#endif //CXIMAGE_SUPPORT_ALPHA
-
- //select the destination
- if (iDst) iDst->Transfer(newImage);
- else Transfer(newImage);
-
- return true;
-}
-////////////////////////////////////////////////////////////////////////////////
-/**
- * New simpler resample. Adds new interpolation methods and simplifies code (using GetPixelColorInterpolated
- * and GetAreaColorInterpolated). It also (unlike old method) interpolates alpha layer.
- *
- * \param newx, newy - size of resampled image
- * \param inMethod - interpolation method to use (see comments at GetPixelColorInterpolated)
- * If image size is being reduced, averaging is used instead (or simultaneously with) inMethod.
- * \param ofMethod - what to replace outside pixels by (only significant for bordering pixels of enlarged image)
- * \param iDst - pointer to destination CxImage or NULL.
- * \param disableAveraging - force no averaging when shrinking images (Produces aliasing.
- * You probably just want to leave this off...)
- *
- * \author ***bd*** 2.2004
- */
-bool CxImage::Resample2(
- int32_t newx, int32_t newy,
- InterpolationMethod const inMethod,
- OverflowMethod const ofMethod,
- CxImage* const iDst,
- bool const disableAveraging)
-{
- if (newx<=0 || newy<=0 || !pDib) return false;
-
- if (head.biWidth==newx && head.biHeight==newy) {
- //image already correct size (just copy and return)
- if (iDst) iDst->Copy(*this);
- return true;
- }//if
-
- //calculate scale of new image (less than 1 for enlarge)
- float xScale, yScale;
- xScale = (float)head.biWidth / (float)newx;
- yScale = (float)head.biHeight / (float)newy;
-
- //create temporary destination image
- CxImage newImage;
- newImage.CopyInfo(*this);
- newImage.Create(newx,newy,head.biBitCount,GetType());
- newImage.SetPalette(GetPalette());
- if (!newImage.IsValid()){
- strcpy(info.szLastError,newImage.GetLastError());
- return false;
- }
-
- //and alpha channel if required
-#if CXIMAGE_SUPPORT_ALPHA
- if (AlphaIsValid()) newImage.AlphaCreate();
- uint8_t *pxptra = 0; // destination alpha data
-#endif
-
- float sX, sY; //source location
- int32_t dX,dY; //destination pixel (int32_t value)
- if ((xScale<=1 && yScale<=1) || disableAveraging) {
- //image is being enlarged (or interpolation on demand)
- if (!IsIndexed()) {
- //RGB24 image (optimized version with direct writes)
- RGBQUAD q; //pixel colour
- uint8_t *pxptr; //pointer to destination pixel
- for(dY=0; dY<newy; dY++){
- info.nProgress = (int32_t)(100*dY/newy);
- if (info.nEscape) break;
- sY = (dY + 0.5f) * yScale - 0.5f;
- pxptr=(uint8_t*)(newImage.BlindGetPixelPointer(0,dY));
-#if CXIMAGE_SUPPORT_ALPHA
- pxptra=newImage.AlphaGetPointer(0,dY);
-#endif
- for(dX=0; dX<newx; dX++){
- sX = (dX + 0.5f) * xScale - 0.5f;
- q=GetPixelColorInterpolated(sX,sY,inMethod,ofMethod,0);
- *pxptr++=q.rgbBlue;
- *pxptr++=q.rgbGreen;
- *pxptr++=q.rgbRed;
-#if CXIMAGE_SUPPORT_ALPHA
- if (pxptra) *pxptra++=q.rgbReserved;
-#endif
- }//for dX
- }//for dY
- } else {
- //enlarge paletted image. Slower method.
- for(dY=0; dY<newy; dY++){
- info.nProgress = (int32_t)(100*dY/newy);
- if (info.nEscape) break;
- sY = (dY + 0.5f) * yScale - 0.5f;
- for(dX=0; dX<newx; dX++){
- sX = (dX + 0.5f) * xScale - 0.5f;
- newImage.SetPixelColor(dX,dY,GetPixelColorInterpolated(sX,sY,inMethod,ofMethod,0),true);
- }//for x
- }//for y
- }//if
- } else {
- //image size is being reduced (averaging enabled)
- for(dY=0; dY<newy; dY++){
- info.nProgress = (int32_t)(100*dY/newy); if (info.nEscape) break;
- sY = (dY+0.5f) * yScale - 0.5f;
- for(dX=0; dX<newx; dX++){
- sX = (dX+0.5f) * xScale - 0.5f;
- newImage.SetPixelColor(dX,dY,GetAreaColorInterpolated(sX, sY, xScale, yScale, inMethod, ofMethod,0),true);
- }//for x
- }//for y
- }//if
-
-#if CXIMAGE_SUPPORT_ALPHA
- if (AlphaIsValid() && pxptra == 0){
- for(int32_t y=0; y<newy; y++){
- dY = (int32_t)(y * yScale);
- for(int32_t x=0; x<newx; x++){
- dX = (int32_t)(x * xScale);
- newImage.AlphaSet(x,y,AlphaGet(dX,dY));
- }
- }
- }
-#endif //CXIMAGE_SUPPORT_ALPHA
-
- //copy new image to the destination
- if (iDst)
- iDst->Transfer(newImage);
- else
- Transfer(newImage);
- return true;
-}
-////////////////////////////////////////////////////////////////////////////////
-/**
- * Reduces the number of bits per pixel to nbit (1, 4 or 8).
- * ppal points to a valid palette for the final image; if not supplied the function will use a standard palette.
- * ppal is not necessary for reduction to 1 bpp.
- */
-bool CxImage::DecreaseBpp(uint32_t nbit, bool errordiffusion, RGBQUAD* ppal, uint32_t clrimportant)
-{
- if (!pDib) return false;
- if (head.biBitCount < nbit){
- strcpy(info.szLastError,"DecreaseBpp: target BPP greater than source BPP");
- return false;
- }
- if (head.biBitCount == nbit){
- if (clrimportant==0) return true;
- if (head.biClrImportant && (head.biClrImportant<clrimportant)) return true;
- }
-
- int32_t er,eg,eb;
- RGBQUAD c,ce;
-
- CxImage tmp;
- tmp.CopyInfo(*this);
- tmp.Create(head.biWidth,head.biHeight,(uint16_t)nbit,info.dwType);
- if (clrimportant) tmp.SetClrImportant(clrimportant);
- if (!tmp.IsValid()){
- strcpy(info.szLastError,tmp.GetLastError());
- return false;
- }
-
-#if CXIMAGE_SUPPORT_SELECTION
- tmp.SelectionCopy(*this);
-#endif //CXIMAGE_SUPPORT_SELECTION
-
-#if CXIMAGE_SUPPORT_ALPHA
- tmp.AlphaCopy(*this);
-#endif //CXIMAGE_SUPPORT_ALPHA
-
- if (ppal) {
- if (clrimportant) {
- tmp.SetPalette(ppal,clrimportant);
- } else {
- tmp.SetPalette(ppal,1<<tmp.head.biBitCount);
- }
- } else {
- tmp.SetStdPalette();
- }
-
- for (int32_t y=0;y<head.biHeight;y++){
- if (info.nEscape) break;
- info.nProgress = (int32_t)(100*y/head.biHeight);
- for (int32_t x=0;x<head.biWidth;x++){
- if (!errordiffusion){
- tmp.BlindSetPixelColor(x,y,BlindGetPixelColor(x,y));
- } else {
- c = BlindGetPixelColor(x,y);
- tmp.BlindSetPixelColor(x,y,c);
-
- ce = tmp.BlindGetPixelColor(x,y);
- er=(int32_t)c.rgbRed - (int32_t)ce.rgbRed;
- eg=(int32_t)c.rgbGreen - (int32_t)ce.rgbGreen;
- eb=(int32_t)c.rgbBlue - (int32_t)ce.rgbBlue;
-
- c = GetPixelColor(x+1,y);
- c.rgbRed = (uint8_t)min(255L,max(0L,(int32_t)c.rgbRed + ((er*7)/16)));
- c.rgbGreen = (uint8_t)min(255L,max(0L,(int32_t)c.rgbGreen + ((eg*7)/16)));
- c.rgbBlue = (uint8_t)min(255L,max(0L,(int32_t)c.rgbBlue + ((eb*7)/16)));
- SetPixelColor(x+1,y,c);
- int32_t coeff=1;
- for(int32_t i=-1; i<2; i++){
- switch(i){
- case -1:
- coeff=2; break;
- case 0:
- coeff=4; break;
- case 1:
- coeff=1; break;
- }
- c = GetPixelColor(x+i,y+1);
- c.rgbRed = (uint8_t)min(255L,max(0L,(int32_t)c.rgbRed + ((er * coeff)/16)));
- c.rgbGreen = (uint8_t)min(255L,max(0L,(int32_t)c.rgbGreen + ((eg * coeff)/16)));
- c.rgbBlue = (uint8_t)min(255L,max(0L,(int32_t)c.rgbBlue + ((eb * coeff)/16)));
- SetPixelColor(x+i,y+1,c);
- }
- }
- }
- }
-
- Transfer(tmp);
- return true;
-}
-////////////////////////////////////////////////////////////////////////////////
-/**
- * Converts the image to B&W using the desired method :
- * - 0 = Floyd-Steinberg
- * - 1 = Ordered-Dithering (4x4)
- * - 2 = Burkes
- * - 3 = Stucki
- * - 4 = Jarvis-Judice-Ninke
- * - 5 = Sierra
- * - 6 = Stevenson-Arce
- * - 7 = Bayer (4x4 ordered dithering)
- * - 8 = Bayer (8x8 ordered dithering)
- * - 9 = Bayer (16x16 ordered dithering)
- */
-bool CxImage::Dither(int32_t method)
-{
- if (!pDib) return false;
- if (head.biBitCount == 1) return true;
-
- GrayScale();
-
- CxImage tmp;
- tmp.CopyInfo(*this);
- tmp.Create(head.biWidth, head.biHeight, 1, info.dwType);
- if (!tmp.IsValid()){
- strcpy(info.szLastError,tmp.GetLastError());
- return false;
- }
-
-#if CXIMAGE_SUPPORT_SELECTION
- tmp.SelectionCopy(*this);
-#endif //CXIMAGE_SUPPORT_SELECTION
-
-#if CXIMAGE_SUPPORT_ALPHA
- tmp.AlphaCopy(*this);
-#endif //CXIMAGE_SUPPORT_ALPHA
-
- switch (method){
- case 1:
- {
- // Multi-Level Ordered-Dithering by Kenny Hoff (Oct. 12, 1995)
- #define dth_NumRows 4
- #define dth_NumCols 4
- #define dth_NumIntensityLevels 2
- #define dth_NumRowsLessOne (dth_NumRows-1)
- #define dth_NumColsLessOne (dth_NumCols-1)
- #define dth_RowsXCols (dth_NumRows*dth_NumCols)
- #define dth_MaxIntensityVal 255
- #define dth_MaxDitherIntensityVal (dth_NumRows*dth_NumCols*(dth_NumIntensityLevels-1))
-
- int32_t DitherMatrix[dth_NumRows][dth_NumCols] = {{0,8,2,10}, {12,4,14,6}, {3,11,1,9}, {15,7,13,5} };
-
- uint8_t Intensity[dth_NumIntensityLevels] = { 0,1 }; // 2 LEVELS B/W
- //uint8_t Intensity[NumIntensityLevels] = { 0,255 }; // 2 LEVELS
- //uint8_t Intensity[NumIntensityLevels] = { 0,127,255 }; // 3 LEVELS
- //uint8_t Intensity[NumIntensityLevels] = { 0,85,170,255 }; // 4 LEVELS
- //uint8_t Intensity[NumIntensityLevels] = { 0,63,127,191,255 }; // 5 LEVELS
- //uint8_t Intensity[NumIntensityLevels] = { 0,51,102,153,204,255 }; // 6 LEVELS
- //uint8_t Intensity[NumIntensityLevels] = { 0,42,85,127,170,213,255 }; // 7 LEVELS
- //uint8_t Intensity[NumIntensityLevels] = { 0,36,73,109,145,182,219,255 }; // 8 LEVELS
- int32_t DitherIntensity, DitherMatrixIntensity, Offset, DeviceIntensity;
- uint8_t DitherValue;
-
- 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++){
-
- DeviceIntensity = BlindGetPixelIndex(x,y);
- DitherIntensity = DeviceIntensity*dth_MaxDitherIntensityVal/dth_MaxIntensityVal;
- DitherMatrixIntensity = DitherIntensity % dth_RowsXCols;
- Offset = DitherIntensity / dth_RowsXCols;
- if (DitherMatrix[y&dth_NumRowsLessOne][x&dth_NumColsLessOne] < DitherMatrixIntensity)
- DitherValue = Intensity[1+Offset];
- else
- DitherValue = Intensity[0+Offset];
-
- tmp.BlindSetPixelIndex(x,y,DitherValue);
- }
- }
- break;
- }
- case 2:
- {
- //Burkes error diffusion (Thanks to Franco Gerevini)
- int32_t TotalCoeffSum = 32;
- int32_t error, nlevel, coeff=1;
- uint8_t level;
-
- 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++) {
- level = BlindGetPixelIndex(x, y);
- if (level > 128) {
- tmp.SetPixelIndex(x, y, 1);
- error = level - 255;
- } else {
- tmp.SetPixelIndex(x, y, 0);
- error = level;
- }
-
- nlevel = GetPixelIndex(x + 1, y) + (error * 8) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(x + 1, y, level);
- nlevel = GetPixelIndex(x + 2, y) + (error * 4) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(x + 2, y, level);
- int32_t i;
- for (i = -2; i < 3; i++) {
- switch (i) {
- case -2:
- coeff = 2;
- break;
- case -1:
- coeff = 4;
- break;
- case 0:
- coeff = 8;
- break;
- case 1:
- coeff = 4;
- break;
- case 2:
- coeff = 2;
- break;
- }
- nlevel = GetPixelIndex(x + i, y + 1) + (error * coeff) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(x + i, y + 1, level);
- }
- }
- }
- break;
- }
- case 3:
- {
- //Stucki error diffusion (Thanks to Franco Gerevini)
- int32_t TotalCoeffSum = 42;
- int32_t error, nlevel, coeff=1;
- uint8_t level;
-
- 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++) {
- level = BlindGetPixelIndex(x, y);
- if (level > 128) {
- tmp.SetPixelIndex(x, y, 1);
- error = level - 255;
- } else {
- tmp.SetPixelIndex(x, y, 0);
- error = level;
- }
-
- nlevel = GetPixelIndex(x + 1, y) + (error * 8) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(x + 1, y, level);
- nlevel = GetPixelIndex(x + 2, y) + (error * 4) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(x + 2, y, level);
- int32_t i;
- for (i = -2; i < 3; i++) {
- switch (i) {
- case -2:
- coeff = 2;
- break;
- case -1:
- coeff = 4;
- break;
- case 0:
- coeff = 8;
- break;
- case 1:
- coeff = 4;
- break;
- case 2:
- coeff = 2;
- break;
- }
- nlevel = GetPixelIndex(x + i, y + 1) + (error * coeff) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(x + i, y + 1, level);
- }
- for (i = -2; i < 3; i++) {
- switch (i) {
- case -2:
- coeff = 1;
- break;
- case -1:
- coeff = 2;
- break;
- case 0:
- coeff = 4;
- break;
- case 1:
- coeff = 2;
- break;
- case 2:
- coeff = 1;
- break;
- }
- nlevel = GetPixelIndex(x + i, y + 2) + (error * coeff) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(x + i, y + 2, level);
- }
- }
- }
- break;
- }
- case 4:
- {
- //Jarvis, Judice and Ninke error diffusion (Thanks to Franco Gerevini)
- int32_t TotalCoeffSum = 48;
- int32_t error, nlevel, coeff=1;
- uint8_t level;
-
- 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++) {
- level = BlindGetPixelIndex(x, y);
- if (level > 128) {
- tmp.SetPixelIndex(x, y, 1);
- error = level - 255;
- } else {
- tmp.SetPixelIndex(x, y, 0);
- error = level;
- }
-
- nlevel = GetPixelIndex(x + 1, y) + (error * 7) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(x + 1, y, level);
- nlevel = GetPixelIndex(x + 2, y) + (error * 5) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(x + 2, y, level);
- int32_t i;
- for (i = -2; i < 3; i++) {
- switch (i) {
- case -2:
- coeff = 3;
- break;
- case -1:
- coeff = 5;
- break;
- case 0:
- coeff = 7;
- break;
- case 1:
- coeff = 5;
- break;
- case 2:
- coeff = 3;
- break;
- }
- nlevel = GetPixelIndex(x + i, y + 1) + (error * coeff) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(x + i, y + 1, level);
- }
- for (i = -2; i < 3; i++) {
- switch (i) {
- case -2:
- coeff = 1;
- break;
- case -1:
- coeff = 3;
- break;
- case 0:
- coeff = 5;
- break;
- case 1:
- coeff = 3;
- break;
- case 2:
- coeff = 1;
- break;
- }
- nlevel = GetPixelIndex(x + i, y + 2) + (error * coeff) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(x + i, y + 2, level);
- }
- }
- }
- break;
- }
- case 5:
- {
- //Sierra error diffusion (Thanks to Franco Gerevini)
- int32_t TotalCoeffSum = 32;
- int32_t error, nlevel, coeff=1;
- uint8_t level;
-
- 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++) {
- level = BlindGetPixelIndex(x, y);
- if (level > 128) {
- tmp.SetPixelIndex(x, y, 1);
- error = level - 255;
- } else {
- tmp.SetPixelIndex(x, y, 0);
- error = level;
- }
-
- nlevel = GetPixelIndex(x + 1, y) + (error * 5) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(x + 1, y, level);
- nlevel = GetPixelIndex(x + 2, y) + (error * 3) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(x + 2, y, level);
- int32_t i;
- for (i = -2; i < 3; i++) {
- switch (i) {
- case -2:
- coeff = 2;
- break;
- case -1:
- coeff = 4;
- break;
- case 0:
- coeff = 5;
- break;
- case 1:
- coeff = 4;
- break;
- case 2:
- coeff = 2;
- break;
- }
- nlevel = GetPixelIndex(x + i, y + 1) + (error * coeff) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(x + i, y + 1, level);
- }
- for (i = -1; i < 2; i++) {
- switch (i) {
- case -1:
- coeff = 2;
- break;
- case 0:
- coeff = 3;
- break;
- case 1:
- coeff = 2;
- break;
- }
- nlevel = GetPixelIndex(x + i, y + 2) + (error * coeff) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(x + i, y + 2, level);
- }
- }
- }
- break;
- }
- case 6:
- {
- //Stevenson and Arce error diffusion (Thanks to Franco Gerevini)
- int32_t TotalCoeffSum = 200;
- int32_t error, nlevel;
- uint8_t level;
-
- 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++) {
- level = BlindGetPixelIndex(x, y);
- if (level > 128) {
- tmp.SetPixelIndex(x, y, 1);
- error = level - 255;
- } else {
- tmp.SetPixelIndex(x, y, 0);
- error = level;
- }
-
- int32_t tmp_index_x = x + 2;
- int32_t tmp_index_y = y;
- int32_t tmp_coeff = 32;
- nlevel = GetPixelIndex(tmp_index_x, tmp_index_y) + (error * tmp_coeff) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(tmp_index_x, tmp_index_y, level);
-
- tmp_index_x = x - 3;
- tmp_index_y = y + 1;
- tmp_coeff = 12;
- nlevel = GetPixelIndex(tmp_index_x, tmp_index_y) + (error * tmp_coeff) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(tmp_index_x, tmp_index_y, level);
-
- tmp_index_x = x - 1;
- tmp_coeff = 26;
- nlevel = GetPixelIndex(tmp_index_x, tmp_index_y) + (error * tmp_coeff) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(tmp_index_x, tmp_index_y, level);
-
- tmp_index_x = x + 1;
- tmp_coeff = 30;
- nlevel = GetPixelIndex(tmp_index_x, tmp_index_y) + (error * tmp_coeff) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(tmp_index_x, tmp_index_y, level);
-
- tmp_index_x = x + 3;
- tmp_coeff = 16;
- nlevel = GetPixelIndex(tmp_index_x, tmp_index_y) + (error * tmp_coeff) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(tmp_index_x, tmp_index_y, level);
-
- tmp_index_x = x - 2;
- tmp_index_y = y + 2;
- tmp_coeff = 12;
- nlevel = GetPixelIndex(tmp_index_x, tmp_index_y) + (error * tmp_coeff) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(tmp_index_x, tmp_index_y, level);
-
- tmp_index_x = x;
- tmp_coeff = 26;
- nlevel = GetPixelIndex(tmp_index_x, tmp_index_y) + (error * tmp_coeff) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(tmp_index_x, tmp_index_y, level);
-
- tmp_index_x = x + 2;
- tmp_coeff = 12;
- nlevel = GetPixelIndex(tmp_index_x, tmp_index_y) + (error * tmp_coeff) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(tmp_index_x, tmp_index_y, level);
-
- tmp_index_x = x - 3;
- tmp_index_y = y + 3;
- tmp_coeff = 5;
- nlevel = GetPixelIndex(tmp_index_x, tmp_index_y) + (error * tmp_coeff) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(tmp_index_x, tmp_index_y, level);
-
- tmp_index_x = x - 1;
- tmp_coeff = 12;
- nlevel = GetPixelIndex(tmp_index_x, tmp_index_y) + (error * tmp_coeff) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(tmp_index_x, tmp_index_y, level);
-
- tmp_index_x = x + 1;
- tmp_coeff = 12;
- nlevel = GetPixelIndex(tmp_index_x, tmp_index_y) + (error * tmp_coeff) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(tmp_index_x, tmp_index_y, level);
-
- tmp_index_x = x + 3;
- tmp_coeff = 5;
- nlevel = GetPixelIndex(tmp_index_x, tmp_index_y) + (error * tmp_coeff) / TotalCoeffSum;
- level = (uint8_t)min(255, max(0, (int32_t)nlevel));
- SetPixelIndex(tmp_index_x, tmp_index_y, level);
- }
- }
- break;
- }
- case 7:
- {
- // Bayer ordered dither
- int32_t order = 4;
- //create Bayer matrix
- if (order>4) order = 4;
- int32_t size = (1 << (2*order));
- uint8_t* Bmatrix = (uint8_t*) malloc(size * sizeof(uint8_t));
- for(int32_t i = 0; i < size; i++) {
- int32_t n = order;
- int32_t x = i / n;
- int32_t y = i % n;
- int32_t dither = 0;
- while (n-- > 0){
- dither = (((dither<<1)|((x&1) ^ (y&1)))<<1) | (y&1);
- x >>= 1;
- y >>= 1;
- }
- Bmatrix[i] = (uint8_t)(dither);
- }
-
- int32_t scale = max(0,(8-2*order));
- int32_t level;
- 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++){
- level = BlindGetPixelIndex(x,y) >> scale;
- if(level > Bmatrix[ (x % order) + order * (y % order) ]){
- tmp.SetPixelIndex(x,y,1);
- } else {
- tmp.SetPixelIndex(x,y,0);
- }
- }
- }
-
- free(Bmatrix);
-
- break;
- }
- case 8:
- {
- // 8x8 Bayer ordered dither
- int32_t const pattern8x8[8][8] = {
- { 0, 32, 8, 40, 2, 34, 10, 42}, /* 8x8 Bayer ordered dithering */
- {48, 16, 56, 24, 50, 18, 58, 26}, /* pattern. Each input pixel */
- {12, 44, 4, 36, 14, 46, 6, 38}, /* is scaled to the 0..63 range */
- {60, 28, 52, 20, 62, 30, 54, 22}, /* before looking in this table */
- { 3, 35, 11, 43, 1, 33, 9, 41}, /* to determine the action. */
- {51, 19, 59, 27, 49, 17, 57, 25},
- {15, 47, 7, 39, 13, 45, 5, 37},
- {63, 31, 55, 23, 61, 29, 53, 21} };
-
- 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++){
- int32_t level = BlindGetPixelIndex(x,y) >> 2;
- if(level && level >= pattern8x8[x & 7][y & 7]){
- tmp.SetPixelIndex(x,y,1);
- } else {
- tmp.SetPixelIndex(x,y,0);
- }
- }
- }
- break;
- }
- case 9:
- {
- // 16x16 Bayer ordered dither
- int32_t const pattern16x16[16][16] = {
- { 1,235, 59,219, 15,231, 55,215, 2,232, 56,216, 12,228, 52,212},
- { 129, 65,187,123,143, 79,183,119,130, 66,184,120,140, 76,180,116},
- { 33,193, 17,251, 47,207, 31,247, 34,194, 18,248, 44,204, 28,244},
- { 161, 97,145, 81,175,111,159, 95,162, 98,146, 82,172,108,156, 92},
- { 9,225, 49,209, 5,239, 63,223, 10,226, 50,210, 6,236, 60,220},
- { 137, 73,177,113,133, 69,191,127,138, 74,178,114,134, 70,188,124},
- { 41,201, 25,241, 37,197, 21,255, 42,202, 26,242, 38,198, 22,252},
- { 169,105,153, 89,165,101,149, 85,170,106,154, 90,166,102,150, 86},
- { 3,233, 57,217, 13,229, 53,213, 0,234, 58,218, 14,230, 54,214},
- { 131, 67,185,121,141, 77,181,117,128, 64,186,122,142, 78,182,118},
- { 35,195, 19,249, 45,205, 29,245, 32,192, 16,250, 46,206, 30,246},
- { 163, 99,147, 83,173,109,157, 93,160, 96,144, 80,174,110,158, 94},
- { 11,227, 51,211, 7,237, 61,221, 8,224, 48,208, 4,238, 62,222},
- { 139, 75,179,115,135, 71,189,125,136, 72,176,112,132, 68,190,126},
- { 43,203, 27,243, 39,199, 23,253, 40,200, 24,240, 36,196, 20,254},
- { 171,107,155, 91,167,103,151, 87,168,104,152, 88,164,100,148, 84}
- };
-
- 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) > pattern16x16[x & 15][y & 15]){
- tmp.SetPixelIndex(x,y,1);
- } else {
- tmp.SetPixelIndex(x,y,0);
- }
- }
- }
- break;
- }
- default:
- {
- // Floyd-Steinberg error diffusion (Thanks to Steve McMahon)
- int32_t error,nlevel,coeff=1;
- uint8_t level;
-
- 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++){
-
- level = BlindGetPixelIndex(x,y);
- if (level > 128){
- tmp.SetPixelIndex(x,y,1);
- error = level-255;
- } else {
- tmp.SetPixelIndex(x,y,0);
- error = level;
- }
-
- nlevel = GetPixelIndex(x+1,y) + (error * 7)/16;
- level = (uint8_t)min(255,max(0,(int32_t)nlevel));
- SetPixelIndex(x+1,y,level);
- for(int32_t i=-1; i<2; i++){
- switch(i){
- case -1:
- coeff=3; break;
- case 0:
- coeff=5; break;
- case 1:
- coeff=1; break;
- }
- nlevel = GetPixelIndex(x+i,y+1) + (error * coeff)/16;
- level = (uint8_t)min(255,max(0,(int32_t)nlevel));
- SetPixelIndex(x+i,y+1,level);
- }
- }
- }
- }
- }
-
- tmp.SetPaletteColor(0,0,0,0);
- tmp.SetPaletteColor(1,255,255,255);
- Transfer(tmp);
-
- return true;
-}
-////////////////////////////////////////////////////////////////////////////////
-/**
- * CropRotatedRectangle
- * \param topx,topy : topmost and leftmost point of the rectangle
- (topmost, and if there are 2 topmost points, the left one)
- * \param width : size of the right hand side of rect, from (topx,topy) roundwalking clockwise
- * \param height : size of the left hand side of rect, from (topx,topy) roundwalking clockwise
- * \param angle : angle of the right hand side of rect, from (topx,topy)
- * \param iDst : pointer to destination image (if 0, this image is modified)
- * \author [VATI]
- */
-bool CxImage::CropRotatedRectangle( int32_t topx, int32_t topy, int32_t width, int32_t height, float angle, CxImage* iDst)
-{
- if (!pDib) return false;
-
-
- int32_t startx,starty,endx,endy;
- double cos_angle = cos(angle/*/57.295779513082320877*/);
- double sin_angle = sin(angle/*/57.295779513082320877*/);
-
- // if there is nothing special, call the original Crop():
- if ( fabs(angle)<0.0002 )
- return Crop( topx, topy, topx+width, topy+height, iDst);
-
- startx = min(topx, topx - (int32_t)(sin_angle*(double)height));
- endx = topx + (int32_t)(cos_angle*(double)width);
- endy = topy + (int32_t)(cos_angle*(double)height + sin_angle*(double)width);
- // check: corners of the rectangle must be inside
- if ( IsInside( startx, topy )==false ||
- IsInside( endx, endy ) == false )
- return false;
-
- // first crop to bounding rectangle
- CxImage tmp(*this, true, false, true);
- // tmp.Copy(*this, true, false, true);
- if (!tmp.IsValid()){
- strcpy(info.szLastError,tmp.GetLastError());
- return false;
- }
- if (!tmp.Crop( startx, topy, endx, endy)){
- strcpy(info.szLastError,tmp.GetLastError());
- return false;
- }
-
- // the midpoint of the image now became the same as the midpoint of the rectangle
- // rotate new image with minus angle amount
- if ( false == tmp.Rotate( (float)(-angle*57.295779513082320877) ) ) // Rotate expects angle in degrees
- return false;
-
- // crop rotated image to the original selection rectangle
- endx = (tmp.head.biWidth+width)/2;
- startx = (tmp.head.biWidth-width)/2;
- starty = (tmp.head.biHeight+height)/2;
- endy = (tmp.head.biHeight-height)/2;
- if ( false == tmp.Crop( startx, starty, endx, endy ) )
- return false;
-
- if (iDst) iDst->Transfer(tmp);
- else Transfer(tmp);
-
- return true;
-}
-////////////////////////////////////////////////////////////////////////////////
-bool CxImage::Crop(const RECT& rect, CxImage* iDst)
-{
- return Crop(rect.left, rect.top, rect.right, rect.bottom, iDst);
-}
-////////////////////////////////////////////////////////////////////////////////
-bool CxImage::Crop(int32_t left, int32_t top, int32_t right, int32_t bottom, CxImage* iDst)
-{
- if (!pDib) return false;
-
- int32_t startx = max(0L,min(left,head.biWidth));
- int32_t endx = max(0L,min(right,head.biWidth));
- int32_t starty = head.biHeight - max(0L,min(top,head.biHeight));
- int32_t endy = head.biHeight - max(0L,min(bottom,head.biHeight));
-
- if (startx==endx || starty==endy) return false;
-
- if (startx>endx) {int32_t tmp=startx; startx=endx; endx=tmp;}
- if (starty>endy) {int32_t tmp=starty; starty=endy; endy=tmp;}
-
- CxImage tmp;
- tmp.CopyInfo(*this);
- tmp.Create(endx-startx,endy-starty,head.biBitCount,info.dwType);
- if (!tmp.IsValid()){
- strcpy(info.szLastError,tmp.GetLastError());
- return false;
- }
-
- tmp.SetPalette(GetPalette(),head.biClrUsed);
- tmp.info.nBkgndIndex = info.nBkgndIndex;
- tmp.info.nBkgndColor = info.nBkgndColor;
-
- switch (head.biBitCount) {
- case 1:
- case 4:
- {
- for(int32_t y=starty, yd=0; y<endy; y++, yd++){
- info.nProgress = (int32_t)(100*(y-starty)/(endy-starty)); //<Anatoly Ivasyuk>
- for(int32_t x=startx, xd=0; x<endx; x++, xd++){
- tmp.SetPixelIndex(xd,yd,GetPixelIndex(x,y));
- }
- }
- break;
- }
- case 8:
- case 24:
- {
- int32_t linelen = tmp.head.biWidth * tmp.head.biBitCount >> 3;
- uint8_t* pDest = tmp.info.pImage;
- uint8_t* pSrc = info.pImage + starty * info.dwEffWidth + (startx*head.biBitCount >> 3);
- for(int32_t y=starty; y<endy; y++){
- info.nProgress = (int32_t)(100*(y-starty)/(endy-starty)); //<Anatoly Ivasyuk>
- memcpy(pDest,pSrc,linelen);
- pDest+=tmp.info.dwEffWidth;
- pSrc+=info.dwEffWidth;
- }
- }
- }
-
-#if CXIMAGE_SUPPORT_ALPHA
- if (AlphaIsValid()){ //<oboolo>
- tmp.AlphaCreate();
- if (!tmp.AlphaIsValid()) return false;
- uint8_t* pDest = tmp.pAlpha;
- uint8_t* pSrc = pAlpha + startx + starty*head.biWidth;
- for (int32_t y=starty; y<endy; y++){
- memcpy(pDest,pSrc,endx-startx);
- pDest+=tmp.head.biWidth;
- pSrc+=head.biWidth;
- }
- }
-#endif //CXIMAGE_SUPPORT_ALPHA
-
- //select the destination
- if (iDst) iDst->Transfer(tmp);
- else Transfer(tmp);
-
- return true;
-}
-////////////////////////////////////////////////////////////////////////////////
-/**
- * \param xgain, ygain : can be from 0 to 1.
- * \param xpivot, ypivot : is the center of the transformation.
- * \param bEnableInterpolation : if true, enables bilinear interpolation.
- * \return true if everything is ok
- */
-bool CxImage::Skew(float xgain, float ygain, int32_t xpivot, int32_t ypivot, bool bEnableInterpolation)
-{
- if (!pDib) return false;
- float nx,ny;
-
- 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
- {
- nx = x + (xgain*(y - ypivot));
- ny = y + (ygain*(x - xpivot));
-#if CXIMAGE_SUPPORT_INTERPOLATION
- if (bEnableInterpolation){
- tmp.SetPixelColor(x,y,GetPixelColorInterpolated(nx, ny, CxImage::IM_BILINEAR, CxImage::OM_BACKGROUND),true);
- } else
-#endif //CXIMAGE_SUPPORT_INTERPOLATION
- {
- if (head.biClrUsed==0){
- tmp.SetPixelColor(x,y,GetPixelColor((int32_t)nx,(int32_t)ny));
- } else {
- tmp.SetPixelIndex(x,y,GetPixelIndex((int32_t)nx,(int32_t)ny));
- }
-#if CXIMAGE_SUPPORT_ALPHA
- tmp.AlphaSet(x,y,AlphaGet((int32_t)nx,(int32_t)ny));
-#endif //CXIMAGE_SUPPORT_ALPHA
- }
- }
- }
- }
- Transfer(tmp);
- return true;
-}
-////////////////////////////////////////////////////////////////////////////////
-/**
- * Expands the borders.
- * \param left, top, right, bottom = additional dimensions, should be greater than 0.
- * \param canvascolor = border color. canvascolor.rgbReserved will set the alpha channel (if any) in the border.
- * \param iDst = pointer to destination image (if it's 0, this image is modified)
- * \return true if everything is ok
- * \author [Colin Urquhart]; changes [DP]
- */
-bool CxImage::Expand(int32_t left, int32_t top, int32_t right, int32_t bottom, RGBQUAD canvascolor, CxImage* iDst)
-{
- if (!pDib) return false;
-
- if ((left < 0) || (right < 0) || (bottom < 0) || (top < 0)) return false;
-
- int32_t newWidth = head.biWidth + left + right;
- int32_t newHeight = head.biHeight + top + bottom;
-
- right = left + head.biWidth - 1;
- top = bottom + head.biHeight - 1;
-
- CxImage tmp;
- tmp.CopyInfo(*this);
- if (!tmp.Create(newWidth, newHeight, head.biBitCount, info.dwType)){
- strcpy(info.szLastError,tmp.GetLastError());
- return false;
- }
-
- tmp.SetPalette(GetPalette(),head.biClrUsed);
-
- switch (head.biBitCount) {
- case 1:
- case 4:
- {
- uint8_t pixel = tmp.GetNearestIndex(canvascolor);
- for(int32_t y=0; y < newHeight; y++){
- info.nProgress = (int32_t)(100*y/newHeight);
- for(int32_t x=0; x < newWidth; x++){
- if ((y < bottom) || (y > top) || (x < left) || (x > right)) {
- tmp.SetPixelIndex(x,y, pixel);
- } else {
- tmp.SetPixelIndex(x,y,GetPixelIndex(x-left,y-bottom));
- }
- }
- }
- break;
- }
- case 8:
- case 24:
- {
- if (head.biBitCount == 8) {
- uint8_t pixel = tmp.GetNearestIndex( canvascolor);
- memset(tmp.info.pImage, pixel, + (tmp.info.dwEffWidth * newHeight));
- } else {
- for (int32_t y = 0; y < newHeight; ++y) {
- uint8_t *pDest = tmp.info.pImage + (y * tmp.info.dwEffWidth);
- for (int32_t x = 0; x < newWidth; ++x) {
- *pDest++ = canvascolor.rgbBlue;
- *pDest++ = canvascolor.rgbGreen;
- *pDest++ = canvascolor.rgbRed;
- }
- }
- }
-
- uint8_t* pDest = tmp.info.pImage + (tmp.info.dwEffWidth * bottom) + (left*(head.biBitCount >> 3));
- uint8_t* pSrc = info.pImage;
- for(int32_t y=bottom; y <= top; y++){
- info.nProgress = (int32_t)(100*y/(1 + top - bottom));
- memcpy(pDest,pSrc,(head.biBitCount >> 3) * (right - left + 1));
- pDest+=tmp.info.dwEffWidth;
- pSrc+=info.dwEffWidth;
- }
- }
- }
-
-#if CXIMAGE_SUPPORT_SELECTION
- if (SelectionIsValid()){
- if (!tmp.SelectionCreate())
- return false;
- uint8_t* pSrc = SelectionGetPointer();
- uint8_t* pDst = tmp.SelectionGetPointer(left,bottom);
- for(int32_t y=bottom; y <= top; y++){
- memcpy(pDst,pSrc, (right - left + 1));
- pSrc+=head.biWidth;
- pDst+=tmp.head.biWidth;
- }
- tmp.info.rSelectionBox.left = info.rSelectionBox.left + left;
- tmp.info.rSelectionBox.right = info.rSelectionBox.right + left;
- tmp.info.rSelectionBox.top = info.rSelectionBox.top + bottom;
- tmp.info.rSelectionBox.bottom = info.rSelectionBox.bottom + bottom;
- }
-#endif //CXIMAGE_SUPPORT_SELECTION
-
-#if CXIMAGE_SUPPORT_ALPHA
- if (AlphaIsValid()){
- if (!tmp.AlphaCreate())
- return false;
- tmp.AlphaSet(canvascolor.rgbReserved);
- uint8_t* pSrc = AlphaGetPointer();
- uint8_t* pDst = tmp.AlphaGetPointer(left,bottom);
- for(int32_t y=bottom; y <= top; y++){
- memcpy(pDst,pSrc, (right - left + 1));
- pSrc+=head.biWidth;
- pDst+=tmp.head.biWidth;
- }
- }
-#endif //CXIMAGE_SUPPORT_ALPHA
-
- //select the destination
- if (iDst) iDst->Transfer(tmp);
- else Transfer(tmp);
-
- return true;
-}
-////////////////////////////////////////////////////////////////////////////////
-bool CxImage::Expand(int32_t newx, int32_t newy, RGBQUAD canvascolor, CxImage* iDst)
-{
- //thanks to <Colin Urquhart>
-
- if (!pDib) return false;
-
- if ((newx < head.biWidth) || (newy < head.biHeight)) return false;
-
- int32_t nAddLeft = (newx - head.biWidth) / 2;
- int32_t nAddTop = (newy - head.biHeight) / 2;
-
- return Expand(nAddLeft, nAddTop, newx - (head.biWidth + nAddLeft), newy - (head.biHeight + nAddTop), canvascolor, iDst);
-}
-////////////////////////////////////////////////////////////////////////////////
-/**
- * Resamples the image with the correct aspect ratio, and fills the borders.
- * \param newx, newy = thumbnail size.
- * \param canvascolor = border color.
- * \param iDst = pointer to destination image (if it's 0, this image is modified).
- * \return true if everything is ok.
- * \author [Colin Urquhart]
- */
-bool CxImage::Thumbnail(int32_t newx, int32_t newy, RGBQUAD canvascolor, CxImage* iDst)
-{
- if (!pDib) return false;
-
- if ((newx <= 0) || (newy <= 0)) return false;
-
- CxImage tmp(*this);
- if (!tmp.IsValid()){
- strcpy(info.szLastError,tmp.GetLastError());
- return false;
- }
-
- // determine whether we need to shrink the image
- if ((head.biWidth > newx) || (head.biHeight > newy)) {
- float fScale;
- float fAspect = (float) newx / (float) newy;
- if (fAspect * head.biHeight > head.biWidth) {
- fScale = (float) newy / head.biHeight;
- } else {
- fScale = (float) newx / head.biWidth;
- }
- tmp.Resample((int32_t) (fScale * head.biWidth), (int32_t) (fScale * head.biHeight), 0);
- }
-
- // expand the frame
- tmp.Expand(newx, newy, canvascolor);
-
- //select the destination
- if (iDst) iDst->Transfer(tmp);
- else Transfer(tmp);
- return true;
-}
-////////////////////////////////////////////////////////////////////////////////
-/**
- * Perform circle_based transformations.
- * \param type - for different transformations
- * - 0 for normal (proturberant) FishEye
- * - 1 for reverse (concave) FishEye
- * - 2 for Swirle
- * - 3 for Cilinder mirror
- * - 4 for bathroom
- *
- * \param rmax - effect radius. If 0, the whole image is processed
- * \param Koeff - only for swirle
- * \author Arkadiy Olovyannikov ark(at)msun(dot)ru
- */
-bool CxImage::CircleTransform(int32_t type,int32_t rmax,float Koeff)
-{
- if (!pDib) return false;
-
- int32_t nx,ny;
- double angle,radius,rnew;
-
- CxImage tmp(*this);
- if (!tmp.IsValid()){
- strcpy(info.szLastError,tmp.GetLastError());
- return false;
- }
-
- int32_t xmin,xmax,ymin,ymax,xmid,ymid;
- 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;
- }
-
- xmid = (int32_t) (tmp.GetWidth()/2);
- ymid = (int32_t) (tmp.GetHeight()/2);
-
- if (!rmax) rmax=(int32_t)sqrt((float)((xmid-xmin)*(xmid-xmin)+(ymid-ymin)*(ymid-ymin)));
- if (Koeff==0.0f) Koeff=1.0f;
-
- 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
- {
- nx=xmid-x;
- ny=ymid-y;
- radius=sqrt((float)(nx*nx+ny*ny));
- if (radius<rmax) {
- angle=atan2((double)ny,(double)nx);
- if (type==0) rnew=radius*radius/rmax;
- else if (type==1) rnew=sqrt(radius*rmax);
- else if (type==2) {rnew=radius;angle += radius / Koeff;}
- else rnew = 1; // potentially uninitialized
- if (type<3){
- nx = xmid + (int32_t)(rnew * cos(angle));
- ny = ymid - (int32_t)(rnew * sin(angle));
- }
- else if (type==3){
- nx = (int32_t)fabs((angle*xmax/6.2831852));
- ny = (int32_t)fabs((radius*ymax/rmax));
- }
- else {
- nx=x+(x%32)-16;
- ny=y;
- }
-// nx=max(xmin,min(nx,xmax));
-// ny=max(ymin,min(ny,ymax));
- }
- else { nx=-1;ny=-1;}
- if (head.biClrUsed==0){
- tmp.SetPixelColor(x,y,GetPixelColor(nx,ny));
- } else {
- tmp.SetPixelIndex(x,y,GetPixelIndex(nx,ny));
- }
-#if CXIMAGE_SUPPORT_ALPHA
- tmp.AlphaSet(x,y,AlphaGet(nx,ny));
-#endif //CXIMAGE_SUPPORT_ALPHA
- }
- }
- }
- Transfer(tmp);
- return true;
-}
-////////////////////////////////////////////////////////////////////////////////
-/**
- * Faster way to almost properly shrink image. Algorithm produces results comparable with "high resoultion shrink"
- * when resulting image is much smaller (that would be 3 times or more) than original. When
- * resulting image is only slightly smaller, results are closer to nearest pixel.
- * This algorithm works by averaging, but it does not calculate fractions of pixels. It adds whole
- * source pixels to the best destionation. It is not geometrically "correct".
- * It's main advantage over "high" resulution shrink is speed, so it's useful, when speed is most
- * important (preview thumbnails, "map" view, ...).
- * Method is optimized for RGB24 images.
- *
- * \param newx, newy - size of destination image (must be smaller than original!)
- * \param iDst - pointer to destination image (if it's 0, this image is modified)
- * \param bChangeBpp - flag points to change result image bpp (if it's true, this result image bpp = 24 (useful for B/W image thumbnails))
- *
- * \return true if everything is ok
- * \author [bd], 9.2004; changes [Artiom Mirolubov], 1.2005
- */
-bool CxImage::QIShrink(int32_t newx, int32_t newy, CxImage* const iDst, bool bChangeBpp)
-{
- if (!pDib) return false;
-
- if (newx>head.biWidth || newy>head.biHeight) {
- //let me repeat... this method can't enlarge image
- strcpy(info.szLastError,"QIShrink can't enlarge image");
- return false;
- }
-
- if (newx==head.biWidth && newy==head.biHeight) {
- //image already correct size (just copy and return)
- if (iDst) iDst->Copy(*this);
- return true;
- }//if
-
- //create temporary destination image
- CxImage newImage;
- newImage.CopyInfo(*this);
- newImage.Create(newx,newy,(bChangeBpp)?24:head.biBitCount,GetType());
- newImage.SetPalette(GetPalette());
- if (!newImage.IsValid()){
- strcpy(info.szLastError,newImage.GetLastError());
- return false;
- }
-
- //and alpha channel if required
-#if CXIMAGE_SUPPORT_ALPHA
- if (AlphaIsValid()) newImage.AlphaCreate();
-#endif
-
- const int32_t oldx = head.biWidth;
- const int32_t oldy = head.biHeight;
-
- int32_t accuCellSize = 4;
-#if CXIMAGE_SUPPORT_ALPHA
- uint8_t *alphaPtr;
- if (AlphaIsValid()) accuCellSize=5;
-#endif
-
- uint32_t *accu = new uint32_t[newx*accuCellSize]; //array for suming pixels... one pixel for every destination column
- uint32_t *accuPtr; //pointer for walking through accu
- //each cell consists of blue, red, green component and count of pixels summed in this cell
- memset(accu, 0, newx * accuCellSize * sizeof(uint32_t)); //clear accu
-
- if (!IsIndexed()) {
- //RGB24 version with pointers
- uint8_t *destPtr, *srcPtr, *destPtrS, *srcPtrS; //destination and source pixel, and beginnings of current row
- srcPtrS=(uint8_t*)BlindGetPixelPointer(0,0);
- destPtrS=(uint8_t*)newImage.BlindGetPixelPointer(0,0);
- int32_t ex=0, ey=0; //ex and ey replace division...
- int32_t dy=0;
- //(we just add pixels, until by adding newx or newy we get a number greater than old size... then
- // it's time to move to next pixel)
-
- for(int32_t y=0; y<oldy; y++){ //for all source rows
- info.nProgress = (int32_t)(100*y/oldy); if (info.nEscape) break;
- ey += newy;
- ex = 0; //restart with ex = 0
- accuPtr=accu; //restart from beginning of accu
- srcPtr=srcPtrS; //and from new source line
-#if CXIMAGE_SUPPORT_ALPHA
- alphaPtr = AlphaGetPointer(0, y);
-#endif
-
- for(int32_t x=0; x<oldx; x++){ //for all source columns
- ex += newx;
- *accuPtr += *(srcPtr++); //add current pixel to current accu slot
- *(accuPtr+1) += *(srcPtr++);
- *(accuPtr+2) += *(srcPtr++);
- (*(accuPtr+3)) ++;
-#if CXIMAGE_SUPPORT_ALPHA
- if (alphaPtr) *(accuPtr+4) += *(alphaPtr++);
-#endif
- if (ex>oldx) { //when we reach oldx, it's time to move to new slot
- accuPtr += accuCellSize;
- ex -= oldx; //(substract oldx from ex and resume from there on)
- }//if (ex overflow)
- }//for x
-
- if (ey>=oldy) { //now when this happens
- ey -= oldy; //it's time to move to new destination row
- destPtr = destPtrS; //reset pointers to proper initial values
- accuPtr = accu;
-#if CXIMAGE_SUPPORT_ALPHA
- alphaPtr = newImage.AlphaGetPointer(0, dy++);
-#endif
- for (int32_t k=0; k<newx; k++) { //copy accu to destination row (divided by number of pixels in each slot)
- *(destPtr++) = (uint8_t)(*(accuPtr) / *(accuPtr+3));
- *(destPtr++) = (uint8_t)(*(accuPtr+1) / *(accuPtr+3));
- *(destPtr++) = (uint8_t)(*(accuPtr+2) / *(accuPtr+3));
-#if CXIMAGE_SUPPORT_ALPHA
- if (alphaPtr) *(alphaPtr++) = (uint8_t)(*(accuPtr+4) / *(accuPtr+3));
-#endif
- accuPtr += accuCellSize;
- }//for k
- memset(accu, 0, newx * accuCellSize * sizeof(uint32_t)); //clear accu
- destPtrS += newImage.info.dwEffWidth;
- }//if (ey overflow)
-
- srcPtrS += info.dwEffWidth; //next round we start from new source row
- }//for y
- } else {
- //standard version with GetPixelColor...
- int32_t ex=0, ey=0; //ex and ey replace division...
- int32_t dy=0;
- //(we just add pixels, until by adding newx or newy we get a number greater than old size... then
- // it's time to move to next pixel)
- RGBQUAD rgb;
-
- for(int32_t y=0; y<oldy; y++){ //for all source rows
- info.nProgress = (int32_t)(100*y/oldy); if (info.nEscape) break;
- ey += newy;
- ex = 0; //restart with ex = 0
- accuPtr=accu; //restart from beginning of accu
- for(int32_t x=0; x<oldx; x++){ //for all source columns
- ex += newx;
- rgb = GetPixelColor(x, y, true);
- *accuPtr += rgb.rgbBlue; //add current pixel to current accu slot
- *(accuPtr+1) += rgb.rgbRed;
- *(accuPtr+2) += rgb.rgbGreen;
- (*(accuPtr+3)) ++;
-#if CXIMAGE_SUPPORT_ALPHA
- if (pAlpha) *(accuPtr+4) += rgb.rgbReserved;
-#endif
- if (ex>oldx) { //when we reach oldx, it's time to move to new slot
- accuPtr += accuCellSize;
- ex -= oldx; //(substract oldx from ex and resume from there on)
- }//if (ex overflow)
- }//for x
-
- if (ey>=oldy) { //now when this happens
- ey -= oldy; //it's time to move to new destination row
- accuPtr = accu;
- for (int32_t dx=0; dx<newx; dx++) { //copy accu to destination row (divided by number of pixels in each slot)
- rgb.rgbBlue = (uint8_t)(*(accuPtr) / *(accuPtr+3));
- rgb.rgbRed = (uint8_t)(*(accuPtr+1) / *(accuPtr+3));
- rgb.rgbGreen= (uint8_t)(*(accuPtr+2) / *(accuPtr+3));
-#if CXIMAGE_SUPPORT_ALPHA
- if (pAlpha) rgb.rgbReserved = (uint8_t)(*(accuPtr+4) / *(accuPtr+3));
-#endif
- newImage.SetPixelColor(dx, dy, rgb, pAlpha!=0);
- accuPtr += accuCellSize;
- }//for dx
- memset(accu, 0, newx * accuCellSize * sizeof(uint32_t)); //clear accu
- dy++;
- }//if (ey overflow)
- }//for y
- }//if
-
- delete [] accu; //delete helper array
-
- //copy new image to the destination
- if (iDst)
- iDst->Transfer(newImage);
- else
- Transfer(newImage);
- return true;
-
-}
-
-////////////////////////////////////////////////////////////////////////////////
-#endif //CXIMAGE_SUPPORT_TRANSFORMATION
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