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Diffstat (limited to 'archive/hge/CxImage/ximatga.cpp')
| -rw-r--r-- | archive/hge/CxImage/ximatga.cpp | 320 |
1 files changed, 320 insertions, 0 deletions
diff --git a/archive/hge/CxImage/ximatga.cpp b/archive/hge/CxImage/ximatga.cpp new file mode 100644 index 0000000..f1a762a --- /dev/null +++ b/archive/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 // <vho>
+ 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"); // <vho> - 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<tgaHead.CmapLength; i++) SetPaletteColor((uint8_t)i,pal[i].b,pal[i].g,pal[i].r);
+ }
+
+ if (tgaHead.ImageType == TGA_Mono || tgaHead.ImageType == TGA_RLEMono)
+ SetGrayPalette();
+
+ // Bits 4 & 5 of the Image Descriptor byte control the ordering of the pixels.
+ bool bXReversed = ((tgaHead.ImagDesc & 16) == 16);
+ bool bYReversed = ((tgaHead.ImagDesc & 32) == 32);
+
+ CImageIterator iter(this);
+ uint8_t rleLeftover = 255; //for images with illegal packet boundary
+ uint8_t* pDest;
+ for (int32_t y=0; y < tgaHead.ImageHeight; y++){
+
+ if (info.nEscape) cx_throw("Cancelled"); // <vho> - 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(); //<lioucr>
+#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<tgaHead.ImageWidth;x++, x4+=4){
+ c = BlindGetPixelColor(x,y);
+ pDest[x4+0]=c.rgbBlue;
+ pDest[x4+1]=c.rgbGreen;
+ pDest[x4+2]=c.rgbRed;
+#if CXIMAGE_SUPPORT_ALPHA // <vho>
+ 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; x<width; ){
+ if (rleLeftover != 255){
+ rle = rleLeftover;
+ rleLeftover = 255;
+ } else {
+ hFile->Read(&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 // <vho>
+ 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; x<width; x++){
+ hFile->Read(&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; x<width; x++){
+ RGBQUAD pixel;
+ hFile->Read(&pixel,4,1);
+ *dst++ = pixel.rgbBlue;
+ *dst++ = pixel.rgbGreen;
+ *dst++ = pixel.rgbRed;
+#if CXIMAGE_SUPPORT_ALPHA // <vho>
+ 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
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