From c91847d549cc1c30eb15504a15ea9a6d5aa48165 Mon Sep 17 00:00:00 2001 From: "chirs241097@gmail.com" Date: Sun, 12 Jan 2014 14:43:14 +0000 Subject: --- hge/CxImage/ximapcx.cpp | 479 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 479 insertions(+) create mode 100644 hge/CxImage/ximapcx.cpp (limited to 'hge/CxImage/ximapcx.cpp') diff --git a/hge/CxImage/ximapcx.cpp b/hge/CxImage/ximapcx.cpp new file mode 100644 index 0000000..2fa2f5d --- /dev/null +++ b/hge/CxImage/ximapcx.cpp @@ -0,0 +1,479 @@ +/* + * File: ximapcx.cpp + * Purpose: Platform Independent PCX Image Class Loader and Writer + * 05/Jan/2002 Davide Pizzolato - www.xdp.it + * CxImage version 7.0.0 31/Dec/2010 + * + * based on ppmtopcx.c - convert a portable pixmap to PCX + * Copyright (C) 1994 by Ingo Wilken (Ingo.Wilken@informatik.uni-oldenburg.de) + * based on ppmtopcx.c by Michael Davidson + */ + +#include "ximapcx.h" + +#if CXIMAGE_SUPPORT_PCX + +#include "xmemfile.h" + +#define PCX_MAGIC 0X0A // PCX magic number +#define PCX_256_COLORS 0X0C // magic number for 256 colors +#define PCX_HDR_SIZE 128 // size of PCX header +#define PCX_MAXCOLORS 256 +#define PCX_MAXPLANES 4 +#define PCX_MAXVAL 255 + +//////////////////////////////////////////////////////////////////////////////// +#if CXIMAGE_SUPPORT_DECODE +//////////////////////////////////////////////////////////////////////////////// +bool CxImagePCX::Decode(CxFile *hFile) +{ + if (hFile == NULL) return false; + + PCXHEADER pcxHeader; + int32_t i, x, y, y2, nbytes, count, Height, Width; + uint8_t c, ColorMap[PCX_MAXCOLORS][3]; + uint8_t *pcximage = NULL, *lpHead1 = NULL, *lpHead2 = NULL; + uint8_t *pcxplanes, *pcxpixels; + + cx_try + { + if (hFile->Read(&pcxHeader,sizeof(PCXHEADER),1)==0) cx_throw("Can't read PCX image"); + + PCX_toh(&pcxHeader); + + if (pcxHeader.Manufacturer != PCX_MAGIC) cx_throw("Error: Not a PCX file"); + // Check for PCX run length encoding + if (pcxHeader.Encoding != 1) cx_throw("PCX file has unknown encoding scheme"); + + Width = (pcxHeader.Xmax - pcxHeader.Xmin) + 1; + Height = (pcxHeader.Ymax - pcxHeader.Ymin) + 1; + info.xDPI = pcxHeader.Hres; + info.yDPI = pcxHeader.Vres; + + if (info.nEscape == -1){ + head.biWidth = Width; + head.biHeight= Height; + info.dwType = CXIMAGE_FORMAT_PCX; + return true; + } + + // Check that we can handle this image format + if (pcxHeader.ColorPlanes > 4) + cx_throw("Can't handle image with more than 4 planes"); + + // Create the image + if (pcxHeader.ColorPlanes >= 3 && pcxHeader.BitsPerPixel == 8){ + Create (Width, Height, 24, CXIMAGE_FORMAT_PCX); +#if CXIMAGE_SUPPORT_ALPHA + if (pcxHeader.ColorPlanes==4) AlphaCreate(); +#endif //CXIMAGE_SUPPORT_ALPHA + } else if (pcxHeader.ColorPlanes == 4 && pcxHeader.BitsPerPixel == 1) + Create (Width, Height, 4, CXIMAGE_FORMAT_PCX); + else + Create (Width, Height, pcxHeader.BitsPerPixel, CXIMAGE_FORMAT_PCX); + + if (info.nEscape) cx_throw("Cancelled"); // - cancel decoding + + //Read the image and check if it's ok + nbytes = pcxHeader.BytesPerLine * pcxHeader.ColorPlanes * Height; + lpHead1 = pcximage = (uint8_t*)malloc(nbytes); + while (nbytes > 0){ + if (hFile == NULL || hFile->Eof()) cx_throw("corrupted PCX"); + + hFile->Read(&c,1,1); + if ((c & 0XC0) != 0XC0){ // Repeated group + *pcximage++ = c; + --nbytes; + continue; + } + count = c & 0X3F; // extract count + hFile->Read(&c,1,1); + if (count > nbytes) cx_throw("repeat count spans end of image"); + + nbytes -= count; + while (--count >=0) *pcximage++ = c; + } + pcximage = lpHead1; + + //store the palette + for (i = 0; i < 16; i++){ + ColorMap[i][0] = pcxHeader.ColorMap[i][0]; + ColorMap[i][1] = pcxHeader.ColorMap[i][1]; + ColorMap[i][2] = pcxHeader.ColorMap[i][2]; + } + if (pcxHeader.BitsPerPixel == 8 && pcxHeader.ColorPlanes == 1){ + hFile->Read(&c,1,1); + if (c != PCX_256_COLORS) cx_throw("bad color map signature"); + + for (i = 0; i < PCX_MAXCOLORS; i++){ + hFile->Read(&ColorMap[i][0],1,1); + hFile->Read(&ColorMap[i][1],1,1); + hFile->Read(&ColorMap[i][2],1,1); + } + } + if (pcxHeader.BitsPerPixel == 1 && pcxHeader.ColorPlanes == 1){ + ColorMap[0][0] = ColorMap[0][1] = ColorMap[0][2] = 0; + ColorMap[1][0] = ColorMap[1][1] = ColorMap[1][2] = 255; + } + + for (uint32_t idx=0; idx - cancel decoding + + y2=Height-1-y; + pcxpixels = lpHead2; + pcxplanes = pcximage + (y * pcxHeader.BytesPerLine * pcxHeader.ColorPlanes); + + if (pcxHeader.ColorPlanes == 3 && pcxHeader.BitsPerPixel == 8){ + // Deal with 24 bit color image + for (x = 0; x < Width; x++){ + SetPixelColor(x,y2,RGB(pcxplanes[x],pcxplanes[pcxHeader.BytesPerLine + x],pcxplanes[2*pcxHeader.BytesPerLine + x])); + } + continue; +#if CXIMAGE_SUPPORT_ALPHA + } else if (pcxHeader.ColorPlanes == 4 && pcxHeader.BitsPerPixel == 8){ + for (x = 0; x < Width; x++){ + SetPixelColor(x,y2,RGB(pcxplanes[x],pcxplanes[pcxHeader.BytesPerLine + x],pcxplanes[2*pcxHeader.BytesPerLine + x])); + AlphaSet(x,y2,pcxplanes[3*pcxHeader.BytesPerLine + x]); + } + continue; +#endif //CXIMAGE_SUPPORT_ALPHA + } else if (pcxHeader.ColorPlanes == 1) { + if (!PCX_UnpackPixels(pcxpixels, pcxplanes, pcxHeader.BytesPerLine, pcxHeader.ColorPlanes, pcxHeader.BitsPerPixel)){ + cx_throw("PCX_UnpackPixels: Can't handle packed pixels with more than 1 plane"); + } + } else { + if (!PCX_PlanesToPixels(pcxpixels, pcxplanes, pcxHeader.BytesPerLine, pcxHeader.ColorPlanes, pcxHeader.BitsPerPixel)){ + cx_throw("PCX_PlanesToPixels: more than 4 planes or more than 1 bit per pixel"); + } + } + for (x = 0; x < Width; x++) SetPixelIndex(x,y2,pcxpixels[x]); + } + + } cx_catch { + if (strcmp(message,"")) strncpy(info.szLastError,message,255); + if (lpHead1){ free(lpHead1); lpHead1 = NULL; } + if (lpHead2){ free(lpHead2); lpHead2 = NULL; } + return false; + } + if (lpHead1){ free(lpHead1); lpHead1 = NULL; } + if (lpHead2){ free(lpHead2); lpHead2 = NULL; } + return true; +} +//////////////////////////////////////////////////////////////////////////////// +#endif //CXIMAGE_SUPPORT_DECODE +//////////////////////////////////////////////////////////////////////////////// +#if CXIMAGE_SUPPORT_ENCODE +//////////////////////////////////////////////////////////////////////////////// +bool CxImagePCX::Encode(CxFile * hFile) +{ + if (EncodeSafeCheck(hFile)) return false; + + cx_try + { + PCXHEADER pcxHeader; + memset(&pcxHeader,0,sizeof(pcxHeader)); + pcxHeader.Manufacturer = PCX_MAGIC; + pcxHeader.Version = 5; + pcxHeader.Encoding = 1; + pcxHeader.Xmin = 0; + pcxHeader.Ymin = 0; + pcxHeader.Xmax = (uint16_t)head.biWidth-1; + pcxHeader.Ymax = (uint16_t)head.biHeight-1; + pcxHeader.Hres = (uint16_t)info.xDPI; + pcxHeader.Vres = (uint16_t)info.yDPI; + pcxHeader.Reserved = 0; + pcxHeader.PaletteType = head.biClrUsed==0; + + switch(head.biBitCount){ + case 24: + case 8: + { + pcxHeader.BitsPerPixel = 8; + pcxHeader.ColorPlanes = head.biClrUsed==0 ? 3 : 1; +#if CXIMAGE_SUPPORT_ALPHA + if (AlphaIsValid() && head.biClrUsed==0) pcxHeader.ColorPlanes =4; +#endif //CXIMAGE_SUPPORT_ALPHA + pcxHeader.BytesPerLine = (uint16_t)head.biWidth; + break; + } + default: //(4 1) + pcxHeader.BitsPerPixel = 1; + pcxHeader.ColorPlanes = head.biClrUsed==16 ? 4 : 1; + pcxHeader.BytesPerLine = (uint16_t)((head.biWidth * pcxHeader.BitsPerPixel + 7)>>3); + } + + if (pcxHeader.BitsPerPixel == 1 && pcxHeader.ColorPlanes == 1){ + pcxHeader.ColorMap[0][0] = pcxHeader.ColorMap[0][1] = pcxHeader.ColorMap[0][2] = 0; + pcxHeader.ColorMap[1][0] = pcxHeader.ColorMap[1][1] = pcxHeader.ColorMap[1][2] = 255; + } + if (pcxHeader.BitsPerPixel == 1 && pcxHeader.ColorPlanes == 4){ + RGBQUAD c; + for (int32_t i = 0; i < 16; i++){ + c=GetPaletteColor(i); + pcxHeader.ColorMap[i][0] = c.rgbRed; + pcxHeader.ColorMap[i][1] = c.rgbGreen; + pcxHeader.ColorMap[i][2] = c.rgbBlue; + } + } + + pcxHeader.BytesPerLine = (pcxHeader.BytesPerLine + 1)&(~1); + + PCX_toh(&pcxHeader); + if (hFile->Write(&pcxHeader, sizeof(pcxHeader), 1) == 0 ) + cx_throw("cannot write PCX header"); + PCX_toh(&pcxHeader); + + CxMemFile buffer; + buffer.Open(); + + uint8_t c,n; + int32_t x,y; + if (head.biClrUsed==0){ + for (y = head.biHeight-1; y >=0 ; y--){ + for (int32_t p=0; pWrite(buffer.GetBuffer(false),buffer.Tell(),1); + + } else if (head.biBitCount==8) { + + for (y = head.biHeight-1; y >=0 ; y--){ + c=n=0; + for (x = 0; xWrite(buffer.GetBuffer(false),buffer.Tell(),1); + + if (head.biBitCount == 8){ + hFile->PutC(0x0C); + uint8_t* pal = (uint8_t*)malloc(768); + RGBQUAD c; + for (int32_t i=0;i<256;i++){ + c=GetPaletteColor(i); + pal[3*i+0] = c.rgbRed; + pal[3*i+1] = c.rgbGreen; + pal[3*i+2] = c.rgbBlue; + } + hFile->Write(pal,768,1); + free(pal); + } + } else { //(head.biBitCount==4) || (head.biBitCount==1) + + RGBQUAD *rgb = GetPalette(); + bool binvert = false; + if (CompareColors(&rgb[0],&rgb[1])>0) binvert=(head.biBitCount==1); + + uint8_t* plane = (uint8_t*)malloc(pcxHeader.BytesPerLine); + uint8_t* raw = (uint8_t*)malloc(head.biWidth); + + for(y = head.biHeight-1; y >=0 ; y--) { + + for( x = 0; x < head.biWidth; x++) raw[x] = (uint8_t)GetPixelIndex(x,y); + + if (binvert) for( x = 0; x < head.biWidth; x++) raw[x] = 1-raw[x]; + + for( x = 0; x < pcxHeader.ColorPlanes; x++ ) { + PCX_PixelsToPlanes(raw, head.biWidth, plane, x); + PCX_PackPlanes(plane, pcxHeader.BytesPerLine, buffer); + } + } + + free(plane); + free(raw); + + hFile->Write(buffer.GetBuffer(false),buffer.Tell(),1); + + } + + } cx_catch { + if (strcmp(message,"")) strncpy(info.szLastError,message,255); + return false; + } + return true; +} +//////////////////////////////////////////////////////////////////////////////// +#endif // CXIMAGE_SUPPORT_ENCODE +//////////////////////////////////////////////////////////////////////////////// +// Convert multi-plane format into 1 pixel per byte +// from unpacked file data bitplanes[] into pixel row pixels[] +// image Height rows, with each row having planes image planes each +// bytesperline bytes +bool CxImagePCX::PCX_PlanesToPixels(uint8_t * pixels, uint8_t * bitplanes, int16_t bytesperline, int16_t planes, int16_t bitsperpixel) +{ + int32_t i, j, npixels; + uint8_t * p; + if (planes > 4) return false; + if (bitsperpixel != 1) return false; + + // Clear the pixel buffer + npixels = (bytesperline * 8) / bitsperpixel; + p = pixels; + while (--npixels >= 0) *p++ = 0; + + // Do the format conversion + for (i = 0; i < planes; i++){ + int32_t pixbit, bits, mask; + p = pixels; + pixbit = (1 << i); // pixel bit for this plane + for (j = 0; j < bytesperline; j++){ + bits = *bitplanes++; + for (mask = 0X80; mask != 0; mask >>= 1, p++) + if (bits & mask) *p |= pixbit; + } + } + return true; +} +//////////////////////////////////////////////////////////////////////////////// +// convert packed pixel format into 1 pixel per byte +// from unpacked file data bitplanes[] into pixel row pixels[] +// image Height rows, with each row having planes image planes each +// bytesperline bytes +bool CxImagePCX::PCX_UnpackPixels(uint8_t * pixels, uint8_t * bitplanes, int16_t bytesperline, int16_t planes, int16_t bitsperpixel) +{ + register int32_t bits; + if (planes != 1) return false; + + if (bitsperpixel == 8){ // 8 bits/pixels, no unpacking needed + while (bytesperline-- > 0) *pixels++ = *bitplanes++; + } else if (bitsperpixel == 4){ // 4 bits/pixel, two pixels per byte + while (bytesperline-- > 0){ + bits = *bitplanes++; + *pixels++ = (uint8_t)((bits >> 4) & 0X0F); + *pixels++ = (uint8_t)((bits) & 0X0F); + } + } else if (bitsperpixel == 2){ // 2 bits/pixel, four pixels per byte + while (bytesperline-- > 0){ + bits = *bitplanes++; + *pixels++ = (uint8_t)((bits >> 6) & 0X03); + *pixels++ = (uint8_t)((bits >> 4) & 0X03); + *pixels++ = (uint8_t)((bits >> 2) & 0X03); + *pixels++ = (uint8_t)((bits) & 0X03); + } + } else if (bitsperpixel == 1){ // 1 bits/pixel, 8 pixels per byte + while (bytesperline-- > 0){ + bits = *bitplanes++; + *pixels++ = ((bits & 0X80) != 0); + *pixels++ = ((bits & 0X40) != 0); + *pixels++ = ((bits & 0X20) != 0); + *pixels++ = ((bits & 0X10) != 0); + *pixels++ = ((bits & 0X08) != 0); + *pixels++ = ((bits & 0X04) != 0); + *pixels++ = ((bits & 0X02) != 0); + *pixels++ = ((bits & 0X01) != 0); + } + } + return true; +} +//////////////////////////////////////////////////////////////////////////////// +/* PCX_PackPixels(const int32_t p,uint8_t &c, uint8_t &n, int32_t &l, CxFile &f) + * p = current pixel (-1 ends the line -2 ends odd line) + * c = previous pixel + * n = number of consecutive pixels + */ +void CxImagePCX::PCX_PackPixels(const int32_t p,uint8_t &c, uint8_t &n, CxFile &f) +{ + if (p!=c && n){ + if (n==1 && c<0xC0){ + f.PutC(c); + } else { + f.PutC(0xC0|n); + f.PutC(c); + } + n=0; + } + if (n==0x3F) { + f.PutC(0xFF); + f.PutC(c); + n=0; + } + if (p==-2) f.PutC(0); + c=(uint8_t)p; + n++; +} +//////////////////////////////////////////////////////////////////////////////// +void CxImagePCX::PCX_PackPlanes(uint8_t* buff, const int32_t size, CxFile &f) +{ + uint8_t *start,*end; + uint8_t c, previous, count; + + start = buff; + end = buff + size; + previous = *start++; + count = 1; + + while (start < end) { + c = *start++; + if (c == previous && count < 63) { + ++count; + continue; + } + + if (count > 1 || (previous & 0xc0) == 0xc0) { + f.PutC( count | 0xc0 ); + } + f.PutC(previous); + previous = c; + count = 1; + } + + if (count > 1 || (previous & 0xc0) == 0xc0) { + count |= 0xc0; + f.PutC(count); + } + f.PutC(previous); +} +//////////////////////////////////////////////////////////////////////////////// +void CxImagePCX::PCX_PixelsToPlanes(uint8_t* raw, int32_t width, uint8_t* buf, int32_t plane) +{ + int32_t cbit, x, mask; + uint8_t *cp = buf-1; + + mask = 1 << plane; + cbit = -1; + for( x = 0; x < width; x++ ) { + if( cbit < 0 ) { + cbit = 7; + *++cp = 0; + } + if( raw[x] & mask ) + *cp |= (1<Xmin = m_ntohs(p->Xmin); + p->Ymin = m_ntohs(p->Ymin); + p->Xmax = m_ntohs(p->Xmax); + p->Ymax = m_ntohs(p->Ymax); + p->Hres = m_ntohs(p->Hres); + p->Vres = m_ntohs(p->Vres); + p->BytesPerLine = m_ntohs(p->BytesPerLine); + p->PaletteType = m_ntohs(p->PaletteType); +} +//////////////////////////////////////////////////////////////////////////////// +#endif // CXIMAGE_SUPPORT_PCX -- cgit v1.2.3