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/ximatga.cpp | 320 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 320 insertions(+) create mode 100644 hge/CxImage/ximatga.cpp (limited to 'hge/CxImage/ximatga.cpp') diff --git a/hge/CxImage/ximatga.cpp b/hge/CxImage/ximatga.cpp new file mode 100644 index 0000000..f1a762a --- /dev/null +++ b/hge/CxImage/ximatga.cpp @@ -0,0 +1,320 @@ +/* + * File: ximatga.cpp + * Purpose: Platform Independent TGA Image Class Loader and Writer + * 05/Jan/2001 Davide Pizzolato - www.xdp.it + * CxImage version 7.0.0 31/Dec/2010 + */ + +#include "ximatga.h" + +#if CXIMAGE_SUPPORT_TGA + +#include "ximaiter.h" + +// Definitions for image types. +#define TGA_Null 0 +#define TGA_Map 1 +#define TGA_RGB 2 +#define TGA_Mono 3 +#define TGA_RLEMap 9 +#define TGA_RLERGB 10 +#define TGA_RLEMono 11 +#define TGA_CompMap 32 +#define TGA_CompMap4 33 + +//////////////////////////////////////////////////////////////////////////////// +#if CXIMAGE_SUPPORT_DECODE +//////////////////////////////////////////////////////////////////////////////// +bool CxImageTGA::Decode(CxFile *hFile) +{ + if (hFile == NULL) return false; + + TGAHEADER tgaHead; + + cx_try + { + if (hFile->Read(&tgaHead,sizeof(tgaHead),1)==0) + cx_throw("Not a TGA"); + + tga_toh(&tgaHead); + + bool bCompressed; + switch (tgaHead.ImageType){ + case TGA_Map: + case TGA_RGB: + case TGA_Mono: + bCompressed = false; + break; + case TGA_RLEMap: + case TGA_RLERGB: + case TGA_RLEMono: + bCompressed = true; + break; + default: + cx_throw("Unknown TGA image type"); + } + + if (tgaHead.ImageWidth==0 || tgaHead.ImageHeight==0 || tgaHead.PixelDepth==0 || tgaHead.CmapLength>256) + cx_throw("bad TGA header"); + + if (tgaHead.PixelDepth!=8 && tgaHead.PixelDepth!=15 && tgaHead.PixelDepth!=16 && tgaHead.PixelDepth!=24 && tgaHead.PixelDepth!=32) + cx_throw("bad TGA header"); + + if (info.nEscape == -1){ + head.biWidth = tgaHead.ImageWidth ; + head.biHeight= tgaHead.ImageHeight; + info.dwType = CXIMAGE_FORMAT_TGA; + return true; + } + + if (tgaHead.IdLength>0) hFile->Seek(tgaHead.IdLength,SEEK_CUR); //skip descriptor + + Create(tgaHead.ImageWidth, tgaHead.ImageHeight, tgaHead.PixelDepth, CXIMAGE_FORMAT_TGA); +#if CXIMAGE_SUPPORT_ALPHA // + if (tgaHead.PixelDepth==32) AlphaCreate(); // Image has alpha channel +#endif //CXIMAGE_SUPPORT_ALPHA + + if (!IsValid()) cx_throw("TGA Create failed"); + + if (info.nEscape) cx_throw("Cancelled"); // - cancel decoding + + if (tgaHead.CmapType != 0){ // read the palette + rgb_color pal[256]; + hFile->Read(pal,tgaHead.CmapLength*sizeof(rgb_color), 1); + for (int32_t i=0;i - cancel decoding + + if (hFile == NULL || hFile->Eof()) cx_throw("corrupted TGA"); + + if (bYReversed) pDest = iter.GetRow(tgaHead.ImageHeight-y-1); + else pDest = iter.GetRow(y); + + if (bCompressed) rleLeftover = ExpandCompressedLine(pDest,&tgaHead,hFile,tgaHead.ImageWidth,y,rleLeftover); + else ExpandUncompressedLine (pDest,&tgaHead,hFile,tgaHead.ImageWidth,y,0); + } + + if (bXReversed) Mirror(); + +#if CXIMAGE_SUPPORT_ALPHA + if (bYReversed && tgaHead.PixelDepth==32) AlphaFlip(); // +#endif //CXIMAGE_SUPPORT_ALPHA + + } cx_catch { + if (strcmp(message,"")) strncpy(info.szLastError,message,255); + return false; + } + return true; +} +//////////////////////////////////////////////////////////////////////////////// +#endif //CXIMAGE_SUPPORT_DECODE +//////////////////////////////////////////////////////////////////////////////// +#if CXIMAGE_SUPPORT_ENCODE +//////////////////////////////////////////////////////////////////////////////// +bool CxImageTGA::Encode(CxFile * hFile) +{ + if (EncodeSafeCheck(hFile)) return false; + + if (head.biBitCount<8){ + strcpy(info.szLastError,"Bit depth must be 8 or 24"); + return false; + } + + TGAHEADER tgaHead; + + tgaHead.IdLength = 0; // Image ID Field Length + tgaHead.CmapType = GetPalette()!=0; // Color Map Type + tgaHead.ImageType = (head.biBitCount == 8) ? (uint8_t)TGA_Map : (uint8_t)TGA_RGB; // Image Type + + tgaHead.CmapIndex=0; // First Entry Index + tgaHead.CmapLength=(head.biBitCount == 8) ? 256 : 0; // Color Map Length + tgaHead.CmapEntrySize=(head.biBitCount == 8) ? (uint8_t)24 : (uint8_t)0; // Color Map Entry Size + + tgaHead.X_Origin=0; // X-origin of Image + tgaHead.Y_Origin=0; // Y-origin of Image + tgaHead.ImageWidth=(uint16_t)head.biWidth; // Image Width + tgaHead.ImageHeight=(uint16_t)head.biHeight; // Image Height + tgaHead.PixelDepth=(uint8_t)head.biBitCount; // Pixel Depth + tgaHead.ImagDesc=0; // Image Descriptor + + if (pAlpha && head.biBitCount==24) tgaHead.PixelDepth=32; + + tga_toh(&tgaHead); + hFile->Write(&tgaHead,sizeof(TGAHEADER),1); + tga_toh(&tgaHead); + + if (head.biBitCount==8){ + rgb_color pal[256]; + RGBQUAD* ppal = GetPalette(); + for (int32_t i=0;i<256; i++){ + pal[i].r = ppal[i].rgbBlue; + pal[i].g = ppal[i].rgbGreen; + pal[i].b = ppal[i].rgbRed; + } + hFile->Write(&pal,256*sizeof(rgb_color),1); + } + + CImageIterator iter(this); + uint8_t* pDest; + if (pAlpha==0 || head.biBitCount==8){ + for (int32_t y=0; y < tgaHead.ImageHeight; y++){ + pDest = iter.GetRow(y); + hFile->Write(pDest,tgaHead.ImageWidth * (head.biBitCount >> 3),1); + } + } else { + pDest = (uint8_t*)malloc(4*tgaHead.ImageWidth); + RGBQUAD c; + for (int32_t y=0; y < tgaHead.ImageHeight; y++){ + for(int32_t x=0, x4=0;x + pDest[x4+3]=AlphaGet(x,y); +#else + pDest[x4+3]=0; +#endif //CXIMAGE_SUPPORT_ALPHA + } + hFile->Write(pDest,4*tgaHead.ImageWidth,1); + } + free(pDest); + } + return true; +} +//////////////////////////////////////////////////////////////////////////////// +#endif // CXIMAGE_SUPPORT_ENCODE +//////////////////////////////////////////////////////////////////////////////// +uint8_t CxImageTGA::ExpandCompressedLine(uint8_t* pDest,TGAHEADER* ptgaHead,CxFile *hFile,int32_t width, int32_t y, uint8_t rleLeftover) +{ + uint8_t rle; + int32_t filePos=0; + for (int32_t x=0; xRead(&rle,1,1); + } + if (rle & 128) { // RLE-Encoded packet + rle -= 127; // Calculate real repeat count. + if ((x+rle)>width){ + rleLeftover = (uint8_t)(128 + (rle - (width - x) - 1)); + filePos = hFile->Tell(); + rle = (uint8_t)(width - x); + } + switch (ptgaHead->PixelDepth) + { + case 32: { + RGBQUAD color; + hFile->Read(&color,4,1); + for (int32_t ix = 0; ix < rle; ix++){ + memcpy(&pDest[3*ix],&color,3); +#if CXIMAGE_SUPPORT_ALPHA // + AlphaSet(ix+x,y,color.rgbReserved); +#endif //CXIMAGE_SUPPORT_ALPHA + } + break; + } + case 24: { + rgb_color triple; + hFile->Read(&triple,3,1); + for (int32_t ix = 0; ix < rle; ix++) memcpy(&pDest[3*ix],&triple,3); + break; + } + case 15: + case 16: { + uint16_t pixel; + hFile->Read(&pixel,2,1); + rgb_color triple; + triple.r = (uint8_t)(( pixel & 0x1F ) * 8); // red + triple.g = (uint8_t)(( pixel >> 2 ) & 0x0F8); // green + triple.b = (uint8_t)(( pixel >> 7 ) & 0x0F8); // blue + for (int32_t ix = 0; ix < rle; ix++){ + memcpy(&pDest[3*ix],&triple,3); + } + break; + } + case 8: { + uint8_t pixel; + hFile->Read(&pixel,1,1); + for (int32_t ix = 0; ix < rle; ix++) pDest[ix] = pixel; + } + } + if (rleLeftover!=255) hFile->Seek(filePos, SEEK_SET); + } else { // Raw packet + rle += 1; // Calculate real repeat count. + if ((x+rle)>width){ + rleLeftover = (uint8_t)(rle - (width - x) - 1); + rle = (uint8_t)(width - x); + } + ExpandUncompressedLine(pDest,ptgaHead,hFile,rle,y,x); + } + if (head.biBitCount == 24) pDest += rle*3; else pDest += rle; + x += rle; + } + return rleLeftover; +} +//////////////////////////////////////////////////////////////////////////////// +void CxImageTGA::ExpandUncompressedLine(uint8_t* pDest,TGAHEADER* ptgaHead,CxFile *hFile,int32_t width, int32_t y, int32_t xoffset) +{ + switch (ptgaHead->PixelDepth){ + case 8: + hFile->Read(pDest,width,1); + break; + case 15: + case 16:{ + uint8_t* dst=pDest; + uint16_t pixel; + for (int32_t x=0; xRead(&pixel,2,1); + *dst++ = (uint8_t)(( pixel & 0x1F ) * 8); // blue + *dst++ = (uint8_t)(( pixel >> 2 ) & 0x0F8); // green + *dst++ = (uint8_t)(( pixel >> 7 ) & 0x0F8); // red + } + break; + } + case 24: + hFile->Read(pDest,3*width,1); + break; + case 32:{ + uint8_t* dst=pDest; + for (int32_t x=0; xRead(&pixel,4,1); + *dst++ = pixel.rgbBlue; + *dst++ = pixel.rgbGreen; + *dst++ = pixel.rgbRed; +#if CXIMAGE_SUPPORT_ALPHA // + AlphaSet(x+xoffset,y,pixel.rgbReserved); //alpha +#endif //CXIMAGE_SUPPORT_ALPHA + } + break; + } + } +} +//////////////////////////////////////////////////////////////////////////////// +void CxImageTGA::tga_toh(TGAHEADER* p) +{ + p->CmapIndex = m_ntohs(p->CmapIndex); + p->CmapLength = m_ntohs(p->CmapLength); + p->X_Origin = m_ntohs(p->X_Origin); + p->Y_Origin = m_ntohs(p->Y_Origin); + p->ImageWidth = m_ntohs(p->ImageWidth); + p->ImageHeight = m_ntohs(p->ImageHeight); +} +//////////////////////////////////////////////////////////////////////////////// +#endif // CXIMAGE_SUPPORT_TGA -- cgit v1.2.3