diff options
Diffstat (limited to 'archive/hge/CxImage/ximapcx.cpp')
| -rw-r--r-- | archive/hge/CxImage/ximapcx.cpp | 479 |
1 files changed, 479 insertions, 0 deletions
diff --git a/archive/hge/CxImage/ximapcx.cpp b/archive/hge/CxImage/ximapcx.cpp new file mode 100644 index 0000000..2fa2f5d --- /dev/null +++ b/archive/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"); // <vho> - 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<head.biClrUsed; idx++) SetPaletteColor((uint8_t)idx,ColorMap[idx][0],ColorMap[idx][1],ColorMap[idx][2]);
+
+ lpHead2 = pcxpixels = (uint8_t *)malloc(Width + pcxHeader.BytesPerLine * 8);
+ // Convert the image
+ for (y = 0; y < Height; y++){
+
+ if (info.nEscape) cx_throw("Cancelled"); // <vho> - 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; p<pcxHeader.ColorPlanes; p++){
+ c=n=0;
+ for (x = 0; x<head.biWidth; x++){
+ if (p==0)
+ PCX_PackPixels(BlindGetPixelColor(x,y).rgbRed,c,n,buffer);
+ else if (p==1)
+ PCX_PackPixels(BlindGetPixelColor(x,y).rgbGreen,c,n,buffer);
+ else if (p==2)
+ PCX_PackPixels(BlindGetPixelColor(x,y).rgbBlue,c,n,buffer);
+#if CXIMAGE_SUPPORT_ALPHA
+ else if (p==3)
+ PCX_PackPixels(BlindAlphaGet(x,y),c,n,buffer);
+#endif //CXIMAGE_SUPPORT_ALPHA
+ }
+ PCX_PackPixels(-1-(head.biWidth&0x1),c,n,buffer);
+ }
+ }
+
+ hFile->Write(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; x<head.biWidth; x++){
+ PCX_PackPixels(GetPixelIndex(x,y),c,n,buffer);
+ }
+ PCX_PackPixels(-1-(head.biWidth&0x1),c,n,buffer);
+ }
+
+ hFile->Write(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<<cbit);
+ --cbit;
+ }
+}
+////////////////////////////////////////////////////////////////////////////////
+void CxImagePCX::PCX_toh(PCXHEADER* p)
+{
+ p->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
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