diff options
Diffstat (limited to 'archive/hge/CxImage/ximage.cpp')
| -rw-r--r-- | archive/hge/CxImage/ximage.cpp | 537 |
1 files changed, 537 insertions, 0 deletions
diff --git a/archive/hge/CxImage/ximage.cpp b/archive/hge/CxImage/ximage.cpp new file mode 100644 index 0000000..904b807 --- /dev/null +++ b/archive/hge/CxImage/ximage.cpp @@ -0,0 +1,537 @@ +// ximage.cpp : main implementation file
+/* 07/08/2001 v1.00 - Davide Pizzolato - www.xdp.it
+ * CxImage version 7.0.0 31/Dec/2010
+ */
+
+#include "ximage.h"
+
+////////////////////////////////////////////////////////////////////////////////
+// CxImage
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Initialize the internal structures
+ */
+void CxImage::Startup(uint32_t imagetype)
+{
+ //init pointers
+ pDib = pSelection = pAlpha = NULL;
+ ppLayers = ppFrames = NULL;
+ //init structures
+ memset(&head,0,sizeof(BITMAPINFOHEADER));
+ memset(&info,0,sizeof(CXIMAGEINFO));
+ //init default attributes
+ info.dwType = imagetype;
+ info.fQuality = 90.0f;
+ info.nAlphaMax = 255;
+ info.nBkgndIndex = -1;
+ info.bEnabled = true;
+ info.nJpegScale = 1;
+ SetXDPI(CXIMAGE_DEFAULT_DPI);
+ SetYDPI(CXIMAGE_DEFAULT_DPI);
+
+ int16_t test = 1;
+ info.bLittleEndianHost = (*((char *) &test) == 1);
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Empty image constructor
+ * \param imagetype: (optional) set the image format, see ENUM_CXIMAGE_FORMATS
+ */
+CxImage::CxImage(uint32_t imagetype)
+{
+ Startup(imagetype);
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Call this function to destroy image pixels, alpha channel, selection and sub layers.
+ * - Attributes are not erased, but IsValid returns false.
+ *
+ * \return true if everything is freed, false if the image is a Ghost
+ */
+bool CxImage::Destroy()
+{
+ //free this only if it's valid and it's not a ghost
+ if (info.pGhost==NULL){
+ if (ppLayers) {
+ for(int32_t n=0; n<info.nNumLayers;n++){ delete ppLayers[n]; }
+ delete [] ppLayers; ppLayers=0; info.nNumLayers = 0;
+ }
+ if (pSelection) {free(pSelection); pSelection=0;}
+ if (pAlpha) {free(pAlpha); pAlpha=0;}
+ if (pDib) {free(pDib); pDib=0;}
+ return true;
+ }
+ return false;
+}
+////////////////////////////////////////////////////////////////////////////////
+bool CxImage::DestroyFrames()
+{
+ if (info.pGhost==NULL) {
+ if (ppFrames) {
+ for (int32_t n=0; n<info.nNumFrames; n++) { delete ppFrames[n]; }
+ delete [] ppFrames; ppFrames = NULL; info.nNumFrames = 0;
+ }
+ return true;
+ }
+ return false;
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Sized image constructor
+ * \param dwWidth: width
+ * \param dwHeight: height
+ * \param wBpp: bit per pixel, can be 1, 4, 8, 24
+ * \param imagetype: (optional) set the image format, see ENUM_CXIMAGE_FORMATS
+ */
+CxImage::CxImage(uint32_t dwWidth, uint32_t dwHeight, uint32_t wBpp, uint32_t imagetype)
+{
+ Startup(imagetype);
+ Create(dwWidth,dwHeight,wBpp,imagetype);
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * image constructor from existing source
+ * \param src: source image.
+ * \param copypixels: copy the pixels from the source image into the new image.
+ * \param copyselection: copy the selection from source
+ * \param copyalpha: copy the alpha channel from source
+ * \sa Copy
+ */
+CxImage::CxImage(const CxImage &src, bool copypixels, bool copyselection, bool copyalpha)
+{
+ Startup(src.GetType());
+ Copy(src,copypixels,copyselection,copyalpha);
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Copies the image from an exsisting source
+ * \param src: source image.
+ * \param copypixels: copy the pixels from the source image into the new image.
+ * \param copyselection: copy the selection from source
+ * \param copyalpha: copy the alpha channel from source
+ */
+void CxImage::Copy(const CxImage &src, bool copypixels, bool copyselection, bool copyalpha)
+{
+ // if the source is a ghost, the copy is still a ghost
+ if (src.info.pGhost){
+ Ghost(&src);
+ return;
+ }
+ //copy the attributes
+ memcpy(&info,&src.info,sizeof(CXIMAGEINFO));
+ memcpy(&head,&src.head,sizeof(BITMAPINFOHEADER)); // [andy] - fix for bitmap header DPI
+ //rebuild the image
+ Create(src.GetWidth(),src.GetHeight(),src.GetBpp(),src.GetType());
+ //copy the pixels and the palette, or at least copy the palette only.
+ if (copypixels && pDib && src.pDib) memcpy(pDib,src.pDib,GetSize());
+ else SetPalette(src.GetPalette());
+ int32_t nSize = head.biWidth * head.biHeight;
+ //copy the selection
+ if (copyselection && src.pSelection){
+ if (pSelection) free(pSelection);
+ pSelection = (uint8_t*)malloc(nSize);
+ memcpy(pSelection,src.pSelection,nSize);
+ }
+ //copy the alpha channel
+ if (copyalpha && src.pAlpha){
+ if (pAlpha) free(pAlpha);
+ pAlpha = (uint8_t*)malloc(nSize);
+ memcpy(pAlpha,src.pAlpha,nSize);
+ }
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Copies the image attributes from an existing image.
+ * - Works only on an empty image, and the image will be still empty.
+ * - <b> Use it before Create() </b>
+ */
+void CxImage::CopyInfo(const CxImage &src)
+{
+ if (pDib==NULL) memcpy(&info,&src.info,sizeof(CXIMAGEINFO));
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * \sa Copy
+ */
+CxImage& CxImage::operator = (const CxImage& isrc)
+{
+ if (this != &isrc) Copy(isrc);
+ return *this;
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Initializes or rebuilds the image.
+ * \param dwWidth: width
+ * \param dwHeight: height
+ * \param wBpp: bit per pixel, can be 1, 4, 8, 24
+ * \param imagetype: (optional) set the image format, see ENUM_CXIMAGE_FORMATS
+ * \return pointer to the internal pDib object; NULL if an error occurs.
+ */
+void* CxImage::Create(uint32_t dwWidth, uint32_t dwHeight, uint32_t wBpp, uint32_t imagetype)
+{
+ // destroy the existing image (if any)
+ if (!Destroy())
+ return NULL;
+
+ // prevent further actions if width or height are not vaild <Balabasnia>
+ if ((dwWidth == 0) || (dwHeight == 0)){
+ strcpy(info.szLastError,"CxImage::Create : width and height must be greater than zero");
+ return NULL;
+ }
+
+ // Make sure bits per pixel is valid
+ if (wBpp <= 1) wBpp = 1;
+ else if (wBpp <= 4) wBpp = 4;
+ else if (wBpp <= 8) wBpp = 8;
+ else wBpp = 24;
+
+ // limit memory requirements
+ if ((((float)dwWidth*(float)dwHeight*(float)wBpp)/8.0f) > (float)CXIMAGE_MAX_MEMORY)
+ {
+ strcpy(info.szLastError,"CXIMAGE_MAX_MEMORY exceeded");
+ return NULL;
+ }
+
+ // set the correct bpp value
+ switch (wBpp){
+ case 1:
+ head.biClrUsed = 2; break;
+ case 4:
+ head.biClrUsed = 16; break;
+ case 8:
+ head.biClrUsed = 256; break;
+ default:
+ head.biClrUsed = 0;
+ }
+
+ //set the common image informations
+ info.dwEffWidth = ((((wBpp * dwWidth) + 31) / 32) * 4);
+ info.dwType = imagetype;
+
+ // initialize BITMAPINFOHEADER
+ head.biSize = sizeof(BITMAPINFOHEADER); //<ralphw>
+ head.biWidth = dwWidth; // fill in width from parameter
+ head.biHeight = dwHeight; // fill in height from parameter
+ head.biPlanes = 1; // must be 1
+ head.biBitCount = (uint16_t)wBpp; // from parameter
+ head.biCompression = BI_RGB;
+ head.biSizeImage = info.dwEffWidth * dwHeight;
+// head.biXPelsPerMeter = 0; See SetXDPI
+// head.biYPelsPerMeter = 0; See SetYDPI
+// head.biClrImportant = 0; See SetClrImportant
+
+ pDib = malloc(GetSize()); // alloc memory block to store our bitmap
+ if (!pDib){
+ strcpy(info.szLastError,"CxImage::Create can't allocate memory");
+ return NULL;
+ }
+
+ //clear the palette
+ RGBQUAD* pal=GetPalette();
+ if (pal) memset(pal,0,GetPaletteSize());
+ //Destroy the existing selection
+#if CXIMAGE_SUPPORT_SELECTION
+ if (pSelection) SelectionDelete();
+#endif //CXIMAGE_SUPPORT_SELECTION
+ //Destroy the existing alpha channel
+#if CXIMAGE_SUPPORT_ALPHA
+ if (pAlpha) AlphaDelete();
+#endif //CXIMAGE_SUPPORT_ALPHA
+
+ // use our bitmap info structure to fill in first part of
+ // our DIB with the BITMAPINFOHEADER
+ BITMAPINFOHEADER* lpbi;
+ lpbi = (BITMAPINFOHEADER*)(pDib);
+ *lpbi = head;
+
+ info.pImage=GetBits();
+
+ return pDib; //return handle to the DIB
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * \return pointer to the image pixels. <b> USE CAREFULLY </b>
+ */
+uint8_t* CxImage::GetBits(uint32_t row)
+{
+ if (pDib){
+ if (row) {
+ if (row<(uint32_t)head.biHeight){
+ return ((uint8_t*)pDib + *(uint32_t*)pDib + GetPaletteSize() + (info.dwEffWidth * row));
+ } else {
+ return NULL;
+ }
+ } else {
+ return ((uint8_t*)pDib + *(uint32_t*)pDib + GetPaletteSize());
+ }
+ }
+ return NULL;
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * \return the size in bytes of the internal pDib object
+ */
+int32_t CxImage::GetSize()
+{
+ return head.biSize + head.biSizeImage + GetPaletteSize();
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Checks if the coordinates are inside the image
+ * \return true if x and y are both inside the image
+ */
+bool CxImage::IsInside(int32_t x, int32_t y)
+{
+ return (0<=y && y<head.biHeight && 0<=x && x<head.biWidth);
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Sets the image bits to the specified value
+ * - for indexed images, the output color is set by the palette entries.
+ * - for RGB images, the output color is a shade of gray.
+ */
+void CxImage::Clear(uint8_t bval)
+{
+ if (pDib == 0) return;
+
+ if (GetBpp() == 1){
+ if (bval > 0) bval = 255;
+ }
+ if (GetBpp() == 4){
+ bval = (uint8_t)(17*(0x0F & bval));
+ }
+
+ memset(info.pImage,bval,head.biSizeImage);
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Transfers the image from an existing source image. The source becomes empty.
+ * \return true if everything is ok
+ */
+bool CxImage::Transfer(CxImage &from, bool bTransferFrames /*=true*/)
+{
+ if (!Destroy())
+ return false;
+
+ memcpy(&head,&from.head,sizeof(BITMAPINFOHEADER));
+ memcpy(&info,&from.info,sizeof(CXIMAGEINFO));
+
+ pDib = from.pDib;
+ pSelection = from.pSelection;
+ pAlpha = from.pAlpha;
+ ppLayers = from.ppLayers;
+
+ memset(&from.head,0,sizeof(BITMAPINFOHEADER));
+ memset(&from.info,0,sizeof(CXIMAGEINFO));
+ from.pDib = from.pSelection = from.pAlpha = NULL;
+ from.ppLayers = NULL;
+
+ if (bTransferFrames){
+ DestroyFrames();
+ ppFrames = from.ppFrames;
+ from.ppFrames = NULL;
+ }
+
+ return true;
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * (this) points to the same pDib owned by (*from), the image remains in (*from)
+ * but (this) has the access to the pixels. <b>Use carefully !!!</b>
+ */
+void CxImage::Ghost(const CxImage *from)
+{
+ if (from){
+ memcpy(&head,&from->head,sizeof(BITMAPINFOHEADER));
+ memcpy(&info,&from->info,sizeof(CXIMAGEINFO));
+ pDib = from->pDib;
+ pSelection = from->pSelection;
+ pAlpha = from->pAlpha;
+ ppLayers = from->ppLayers;
+ ppFrames = from->ppFrames;
+ info.pGhost=(CxImage *)from;
+ }
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * turns a 16 or 32 bit bitfield image into a RGB image
+ */
+void CxImage::Bitfield2RGB(uint8_t *src, uint32_t redmask, uint32_t greenmask, uint32_t bluemask, uint8_t bpp)
+{
+ switch (bpp){
+ case 16:
+ {
+ uint32_t ns[3]={0,0,0};
+ // compute the number of shift for each mask
+ for (int32_t i=0;i<16;i++){
+ if ((redmask>>i)&0x01) ns[0]++;
+ if ((greenmask>>i)&0x01) ns[1]++;
+ if ((bluemask>>i)&0x01) ns[2]++;
+ }
+ ns[1]+=ns[0]; ns[2]+=ns[1]; ns[0]=8-ns[0]; ns[1]-=8; ns[2]-=8;
+ // dword aligned width for 16 bit image
+ int32_t effwidth2=(((head.biWidth + 1) / 2) * 4);
+ uint16_t w;
+ int32_t y2,y3,x2,x3;
+ uint8_t *p=info.pImage;
+ // scan the buffer in reverse direction to avoid reallocations
+ for (int32_t y=head.biHeight-1; y>=0; y--){
+ y2=effwidth2*y;
+ y3=info.dwEffWidth*y;
+ for (int32_t x=head.biWidth-1; x>=0; x--){
+ x2 = 2*x+y2;
+ x3 = 3*x+y3;
+ w = (uint16_t)(src[x2]+256*src[1+x2]);
+ p[ x3]=(uint8_t)((w & bluemask)<<ns[0]);
+ p[1+x3]=(uint8_t)((w & greenmask)>>ns[1]);
+ p[2+x3]=(uint8_t)((w & redmask)>>ns[2]);
+ }
+ }
+ break;
+ }
+ case 32:
+ {
+ uint32_t ns[3]={0,0,0};
+ // compute the number of shift for each mask
+ for (int32_t i=8;i<32;i+=8){
+ if (redmask>>i) ns[0]++;
+ if (greenmask>>i) ns[1]++;
+ if (bluemask>>i) ns[2]++;
+ }
+ // dword aligned width for 32 bit image
+ int32_t effwidth4 = head.biWidth * 4;
+ int32_t y4,y3,x4,x3;
+ uint8_t *p=info.pImage;
+ // scan the buffer in reverse direction to avoid reallocations
+ for (int32_t y=head.biHeight-1; y>=0; y--){
+ y4=effwidth4*y;
+ y3=info.dwEffWidth*y;
+ for (int32_t x=head.biWidth-1; x>=0; x--){
+ x4 = 4*x+y4;
+ x3 = 3*x+y3;
+ p[ x3]=src[ns[2]+x4];
+ p[1+x3]=src[ns[1]+x4];
+ p[2+x3]=src[ns[0]+x4];
+ }
+ }
+ }
+
+ }
+ return;
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * Creates an image from a generic buffer
+ * \param pArray: source memory buffer
+ * \param dwWidth: image width
+ * \param dwHeight: image height
+ * \param dwBitsperpixel: can be 1,4,8,24,32
+ * \param dwBytesperline: line alignment, in bytes, for a single row stored in pArray
+ * \param bFlipImage: tune this parameter if the image is upsidedown
+ * \return true if everything is ok
+ */
+bool CxImage::CreateFromArray(uint8_t* pArray,uint32_t dwWidth,uint32_t dwHeight,uint32_t dwBitsperpixel, uint32_t dwBytesperline, bool bFlipImage)
+{
+ if (pArray==NULL) return false;
+ if (!((dwBitsperpixel==1)||(dwBitsperpixel==4)||(dwBitsperpixel==8)||
+ (dwBitsperpixel==24)||(dwBitsperpixel==32))) return false;
+
+ if (!Create(dwWidth,dwHeight,dwBitsperpixel)) return false;
+
+ if (dwBitsperpixel<24) SetGrayPalette();
+
+#if CXIMAGE_SUPPORT_ALPHA
+ if (dwBitsperpixel==32) AlphaCreate();
+#endif //CXIMAGE_SUPPORT_ALPHA
+
+ uint8_t *dst,*src;
+
+ for (uint32_t y = 0; y<dwHeight; y++) {
+ dst = info.pImage + (bFlipImage?(dwHeight-1-y):y) * info.dwEffWidth;
+ src = pArray + y * dwBytesperline;
+ if (dwBitsperpixel==32){
+ for(uint32_t x=0;x<dwWidth;x++){
+ *dst++=src[0];
+ *dst++=src[1];
+ *dst++=src[2];
+#if CXIMAGE_SUPPORT_ALPHA
+ AlphaSet(x,(bFlipImage?(dwHeight-1-y):y),src[3]);
+#endif //CXIMAGE_SUPPORT_ALPHA
+ src+=4;
+ }
+ } else {
+ memcpy(dst,src,min(info.dwEffWidth,dwBytesperline));
+ }
+ }
+ return true;
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * \sa CreateFromArray
+ */
+bool CxImage::CreateFromMatrix(uint8_t** ppMatrix,uint32_t dwWidth,uint32_t dwHeight,uint32_t dwBitsperpixel, uint32_t dwBytesperline, bool bFlipImage)
+{
+ if (ppMatrix==NULL) return false;
+ if (!((dwBitsperpixel==1)||(dwBitsperpixel==4)||(dwBitsperpixel==8)||
+ (dwBitsperpixel==24)||(dwBitsperpixel==32))) return false;
+
+ if (!Create(dwWidth,dwHeight,dwBitsperpixel)) return false;
+
+ if (dwBitsperpixel<24) SetGrayPalette();
+
+#if CXIMAGE_SUPPORT_ALPHA
+ if (dwBitsperpixel==32) AlphaCreate();
+#endif //CXIMAGE_SUPPORT_ALPHA
+
+ uint8_t *dst,*src;
+
+ for (uint32_t y = 0; y<dwHeight; y++) {
+ dst = info.pImage + (bFlipImage?(dwHeight-1-y):y) * info.dwEffWidth;
+ src = ppMatrix[y];
+ if (src){
+ if (dwBitsperpixel==32){
+ for(uint32_t x=0;x<dwWidth;x++){
+ *dst++=src[0];
+ *dst++=src[1];
+ *dst++=src[2];
+#if CXIMAGE_SUPPORT_ALPHA
+ AlphaSet(x,(bFlipImage?(dwHeight-1-y):y),src[3]);
+#endif //CXIMAGE_SUPPORT_ALPHA
+ src+=4;
+ }
+ } else {
+ memcpy(dst,src,min(info.dwEffWidth,dwBytesperline));
+ }
+ }
+ }
+ return true;
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * \return lightness difference between elem1 and elem2
+ */
+int32_t CxImage::CompareColors(const void *elem1, const void *elem2)
+{
+ RGBQUAD* c1 = (RGBQUAD*)elem1;
+ RGBQUAD* c2 = (RGBQUAD*)elem2;
+
+ int32_t g1 = (int32_t)RGB2GRAY(c1->rgbRed,c1->rgbGreen,c1->rgbBlue);
+ int32_t g2 = (int32_t)RGB2GRAY(c2->rgbRed,c2->rgbGreen,c2->rgbBlue);
+
+ return (g1-g2);
+}
+////////////////////////////////////////////////////////////////////////////////
+/**
+ * simply calls "if (memblock) free(memblock);".
+ * Useful when calling Encode for a memory buffer,
+ * from a DLL compiled with different memory management options.
+ * CxImage::FreeMemory will use the same memory environment used by Encode.
+ * \author [livecn]
+ */
+void CxImage::FreeMemory(void* memblock)
+{
+ if (memblock)
+ free(memblock);
+}
+////////////////////////////////////////////////////////////////////////////////
+//EOF
|