diff options
Diffstat (limited to 'StarsEx/Pcx.cpp')
| -rw-r--r-- | StarsEx/Pcx.cpp | 514 |
1 files changed, 514 insertions, 0 deletions
diff --git a/StarsEx/Pcx.cpp b/StarsEx/Pcx.cpp new file mode 100644 index 0000000..b1d8656 --- /dev/null +++ b/StarsEx/Pcx.cpp @@ -0,0 +1,514 @@ +/* Starshatter: The Open Source Project + Copyright (c) 2021-2022, Starshatter: The Open Source Project Contributors + Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors + Copyright (c) 1997-2006, Destroyer Studios LLC. + + AUTHOR: John DiCamillo
+
+
+ OVERVIEW
+ ========
+ PCX image file loader
+*/
+
+
+#include "Pcx.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+// +--------------------------------------------------------------------+
+
+#define MAX_SIZE (4*1024*1024)
+
+enum { BYTEMODE, RUNMODE };
+
+// +--------------------------------------------------------------------+
+
+PcxImage::PcxImage()
+: width(0), height(0), bitmap(0), himap(0), imagebytes(0)
+{ }
+
+PcxImage::PcxImage(short w, short h, unsigned char* bits, unsigned char* colors)
+: bitmap(0), himap(0)
+{
+ hdr.manufacturer = 10; // Always set to 10
+ hdr.version = 5; // Always 5 for 256-color files
+ hdr.encoding = 1; // Always set to 1
+ hdr.bits_per_pixel = 8; // Should be 8 for 256-color files
+ hdr.xmin = 0;
+ hdr.xmax = w-1;
+ hdr.ymin = 0;
+ hdr.ymax = h-1;
+ hdr.hres = 0x48;
+ hdr.vres = 0x48;
+
+ hdr.palette16[ 0] = (unsigned char) 0x00;
+ hdr.palette16[ 1] = (unsigned char) 0x00;
+ hdr.palette16[ 2] = (unsigned char) 0x00;
+ hdr.palette16[ 3] = (unsigned char) 0x80;
+ hdr.palette16[ 4] = (unsigned char) 0x00;
+ hdr.palette16[ 5] = (unsigned char) 0x00;
+ hdr.palette16[ 6] = (unsigned char) 0x00;
+ hdr.palette16[ 7] = (unsigned char) 0x80;
+ hdr.palette16[ 8] = (unsigned char) 0x00;
+ hdr.palette16[ 9] = (unsigned char) 0x80;
+ hdr.palette16[10] = (unsigned char) 0x80;
+ hdr.palette16[11] = (unsigned char) 0x00;
+ hdr.palette16[12] = (unsigned char) 0x00;
+ hdr.palette16[13] = (unsigned char) 0x00;
+ hdr.palette16[14] = (unsigned char) 0x80;
+ hdr.palette16[15] = (unsigned char) 0x80;
+
+ hdr.palette16[16] = (unsigned char) 0x00;
+ hdr.palette16[17] = (unsigned char) 0x80;
+ hdr.palette16[18] = (unsigned char) 0x00;
+ hdr.palette16[19] = (unsigned char) 0x80;
+ hdr.palette16[20] = (unsigned char) 0x80;
+ hdr.palette16[21] = (unsigned char) 0xC0;
+ hdr.palette16[22] = (unsigned char) 0xC0;
+ hdr.palette16[23] = (unsigned char) 0xC0;
+ hdr.palette16[24] = (unsigned char) 0xC0;
+ hdr.palette16[25] = (unsigned char) 0xDC;
+ hdr.palette16[26] = (unsigned char) 0xC0;
+ hdr.palette16[27] = (unsigned char) 0xA6;
+ hdr.palette16[28] = (unsigned char) 0xCA;
+ hdr.palette16[29] = (unsigned char) 0xF0;
+ hdr.palette16[30] = (unsigned char) 0x33;
+ hdr.palette16[31] = (unsigned char) 0x2B;
+
+ hdr.palette16[32] = (unsigned char) 0x1F;
+ hdr.palette16[33] = (unsigned char) 0x2B;
+ hdr.palette16[34] = (unsigned char) 0x23;
+ hdr.palette16[35] = (unsigned char) 0x1B;
+ hdr.palette16[36] = (unsigned char) 0x5F;
+ hdr.palette16[37] = (unsigned char) 0x5F;
+ hdr.palette16[38] = (unsigned char) 0x5F;
+ hdr.palette16[39] = (unsigned char) 0x2F;
+ hdr.palette16[40] = (unsigned char) 0x2F;
+ hdr.palette16[41] = (unsigned char) 0x2F;
+ hdr.palette16[42] = (unsigned char) 0x27;
+ hdr.palette16[43] = (unsigned char) 0x27;
+ hdr.palette16[44] = (unsigned char) 0x27;
+ hdr.palette16[45] = (unsigned char) 0x1F;
+ hdr.palette16[46] = (unsigned char) 0x1F;
+ hdr.palette16[47] = (unsigned char) 0x1F;
+
+ hdr.reserved = 0; // Reserved for future use
+ hdr.color_planes = 1; // Color planes
+ hdr.bytes_per_line = w; // Number of bytes in 1 line of pixels
+ hdr.palette_type = 1; // Should be 1 for color palette
+
+ for (unsigned int i = 0; i < 58; i++)
+ hdr.filler[i] = 0;
+
+ width = w;
+ height = h;
+ imagebytes = width * height;
+
+ bitmap = new unsigned char [imagebytes];
+
+ if (bitmap) {
+ for (unsigned long i = 0; i < imagebytes; i++)
+ bitmap[i] = bits[i];
+
+ unsigned char* p = pal;
+ for (int i = 0; i < 256; i++) {
+ *p++ = *colors++;
+ *p++ = *colors++;
+ *p++ = *colors++;
+ colors++;
+ }
+ }
+}
+
+PcxImage::PcxImage(short w, short h, unsigned long* hibits)
+: bitmap(0), himap(0)
+{
+ hdr.manufacturer = 10; // Always set to 10
+ hdr.version = 5; // Always 5 for true color files
+ hdr.encoding = 1; // Always set to 1
+ hdr.bits_per_pixel = 8; // Should be 8 for true color files
+ hdr.xmin = 0;
+ hdr.xmax = w-1;
+ hdr.ymin = 0;
+ hdr.ymax = h-1;
+ hdr.hres = 0x48;
+ hdr.vres = 0x48;
+
+ hdr.palette16[ 0] = (unsigned char) 0x00;
+ hdr.palette16[ 1] = (unsigned char) 0x00;
+ hdr.palette16[ 2] = (unsigned char) 0x00;
+ hdr.palette16[ 3] = (unsigned char) 0x80;
+ hdr.palette16[ 4] = (unsigned char) 0x00;
+ hdr.palette16[ 5] = (unsigned char) 0x00;
+ hdr.palette16[ 6] = (unsigned char) 0x00;
+ hdr.palette16[ 7] = (unsigned char) 0x80;
+ hdr.palette16[ 8] = (unsigned char) 0x00;
+ hdr.palette16[ 9] = (unsigned char) 0x80;
+ hdr.palette16[10] = (unsigned char) 0x80;
+ hdr.palette16[11] = (unsigned char) 0x00;
+ hdr.palette16[12] = (unsigned char) 0x00;
+ hdr.palette16[13] = (unsigned char) 0x00;
+ hdr.palette16[14] = (unsigned char) 0x80;
+ hdr.palette16[15] = (unsigned char) 0x80;
+
+ hdr.palette16[16] = (unsigned char) 0x00;
+ hdr.palette16[17] = (unsigned char) 0x80;
+ hdr.palette16[18] = (unsigned char) 0x00;
+ hdr.palette16[19] = (unsigned char) 0x80;
+ hdr.palette16[20] = (unsigned char) 0x80;
+ hdr.palette16[21] = (unsigned char) 0xC0;
+ hdr.palette16[22] = (unsigned char) 0xC0;
+ hdr.palette16[23] = (unsigned char) 0xC0;
+ hdr.palette16[24] = (unsigned char) 0xC0;
+ hdr.palette16[25] = (unsigned char) 0xDC;
+ hdr.palette16[26] = (unsigned char) 0xC0;
+ hdr.palette16[27] = (unsigned char) 0xA6;
+ hdr.palette16[28] = (unsigned char) 0xCA;
+ hdr.palette16[29] = (unsigned char) 0xF0;
+ hdr.palette16[30] = (unsigned char) 0x33;
+ hdr.palette16[31] = (unsigned char) 0x2B;
+
+ hdr.palette16[32] = (unsigned char) 0x1F;
+ hdr.palette16[33] = (unsigned char) 0x2B;
+ hdr.palette16[34] = (unsigned char) 0x23;
+ hdr.palette16[35] = (unsigned char) 0x1B;
+ hdr.palette16[36] = (unsigned char) 0x5F;
+ hdr.palette16[37] = (unsigned char) 0x5F;
+ hdr.palette16[38] = (unsigned char) 0x5F;
+ hdr.palette16[39] = (unsigned char) 0x2F;
+ hdr.palette16[40] = (unsigned char) 0x2F;
+ hdr.palette16[41] = (unsigned char) 0x2F;
+ hdr.palette16[42] = (unsigned char) 0x27;
+ hdr.palette16[43] = (unsigned char) 0x27;
+ hdr.palette16[44] = (unsigned char) 0x27;
+ hdr.palette16[45] = (unsigned char) 0x1F;
+ hdr.palette16[46] = (unsigned char) 0x1F;
+ hdr.palette16[47] = (unsigned char) 0x1F;
+
+ hdr.reserved = 0; // Reserved for future use
+ hdr.color_planes = 3; // Color planes
+ hdr.bytes_per_line = w; // Number of bytes in 1 line of pixels
+ hdr.palette_type = 1; // Should be 1 for color palette
+
+ for (unsigned int i = 0; i < 58; i++)
+ hdr.filler[i] = 0;
+
+ width = w;
+ height = h;
+ imagebytes = width * height;
+
+ himap = new unsigned long [imagebytes];
+
+ if (himap) {
+ for (unsigned long i = 0; i < imagebytes; i++)
+ himap[i] = hibits[i];
+ }
+}
+
+PcxImage::~PcxImage()
+{
+ delete [] bitmap;
+ delete [] himap;
+}
+
+// +--------------------------------------------------------------------+
+
+int PcxImage::Load(char *filename)
+{
+ unsigned long i;
+ short mode=BYTEMODE, bytecount;
+ unsigned char abyte, *p;
+ FILE *f;
+
+ fopen_s(&f, filename,"rb");
+ if (f == NULL)
+ return PCX_NOFILE;
+
+ fread(&hdr, sizeof(PcxHeader), 1, f);
+
+ // read 256 color PCX file
+ if (hdr.color_planes == 1) {
+ width = 1 + hdr.xmax - hdr.xmin;
+ height = 1 + hdr.ymax - hdr.ymin;
+ imagebytes = width * height;
+
+ if (imagebytes > MAX_SIZE)
+ return PCX_TOOBIG;
+
+ // get palette from pcx file
+ fseek(f,-768L,SEEK_END);
+ fread(pal,768,1,f);
+
+ // now go back and read the pixel data:
+ fseek(f,sizeof(PcxHeader),SEEK_SET);
+
+ delete [] himap; himap = 0;
+ delete [] bitmap; bitmap = 0;
+
+ himap = new unsigned long [imagebytes];
+ if (himap == NULL)
+ return PCX_NOMEM;
+
+ // force alpha channel to 255
+ memset(himap, 0xff, imagebytes*4);
+
+ unsigned long* pix = himap;
+ for (i=0; i<imagebytes; i++) {
+ if (mode == BYTEMODE) {
+ abyte = fgetc(f);
+
+ if (abyte > 0xbf) {
+ bytecount = abyte & 0x3f;
+ abyte = fgetc(f);
+ if (--bytecount > 0)
+ mode = RUNMODE;
+ }
+ }
+ else if (--bytecount == 0) {
+ mode = BYTEMODE;
+ }
+
+ *pix++ = 0xff000000 | (pal[3*abyte] << 16) | (pal[3*abyte+1] << 8) | (pal[3*abyte+2]);
+ }
+ }
+
+ // read 24-bit (true COLOR) PCX file
+ else {
+ width = 1 + hdr.xmax - hdr.xmin;
+ height = 1 + hdr.ymax - hdr.ymin;
+ imagebytes = width * height;
+
+ if (imagebytes > MAX_SIZE)
+ return PCX_TOOBIG;
+
+ delete [] himap; himap = 0;
+ delete [] bitmap; bitmap = 0;
+
+ himap = new unsigned long [imagebytes];
+ if (himap == NULL)
+ return PCX_NOMEM;
+
+ // force alpha channel to 255
+ memset(himap, 0xff, imagebytes*4);
+
+ for (int row = 0; row < height; row++) {
+ // RED, GREEN, BLUE
+ for (int plane = 2; plane >= 0; plane--) {
+ p = ((unsigned char*) himap) + width*row*4 + plane;
+ for (int col = 0; col < width; col++) {
+ if (mode == BYTEMODE) {
+ abyte = fgetc(f);
+
+ if (abyte > 0xbf) {
+ bytecount = abyte & 0x3f;
+ abyte = fgetc(f);
+ if (--bytecount > 0)
+ mode = RUNMODE;
+ }
+ }
+ else if (--bytecount == 0) {
+ mode = BYTEMODE;
+ }
+
+ *p = abyte;
+ p += 4;
+ }
+ }
+ }
+ }
+
+ fclose(f);
+ return PCX_OK;
+}
+
+// +--------------------------------------------------------------------+
+
+int PcxImage::LoadBuffer(unsigned char* buf, int len)
+{
+ unsigned long i;
+ short mode=BYTEMODE, bytecount;
+ unsigned char abyte, *p;
+ unsigned char* fp;
+
+ if (buf == NULL)
+ return PCX_NOFILE;
+
+ fp = buf;
+ memcpy(&hdr, buf, sizeof(PcxHeader));
+ fp += sizeof(PcxHeader);
+
+ // read 256 color PCX file
+ if (hdr.color_planes == 1) {
+ width = 1 + hdr.xmax - hdr.xmin;
+ height = 1 + hdr.ymax - hdr.ymin;
+ imagebytes = width * height;
+
+ if (imagebytes > MAX_SIZE)
+ return PCX_TOOBIG;
+
+ // get palette from end of pcx file
+ memcpy(pal,buf+len-768,768);
+
+ delete [] himap; himap = 0;
+ delete [] bitmap; bitmap = 0;
+
+ himap = new unsigned long [imagebytes];
+ if (himap == NULL)
+ return PCX_NOMEM;
+
+ memset(himap, 0, imagebytes*4);
+
+ unsigned long* pix = himap;
+ for (i=0; i<imagebytes; i++) {
+ if (mode == BYTEMODE) {
+ abyte = *fp++;
+
+ if (abyte > 0xbf) {
+ bytecount = abyte & 0x3f;
+ abyte = *fp++;
+ if (--bytecount > 0)
+ mode = RUNMODE;
+ }
+ }
+ else if (--bytecount == 0) {
+ mode = BYTEMODE;
+ }
+
+ *pix++ = 0xff000000 | (pal[3*abyte] << 16) | (pal[3*abyte+1] << 8) | (pal[3*abyte+2]);
+ }
+ }
+
+ // read 24-bit (true COLOR) PCX file
+ else {
+ width = 1 + hdr.xmax - hdr.xmin;
+ height = 1 + hdr.ymax - hdr.ymin;
+ imagebytes = width * height;
+
+ if (imagebytes > MAX_SIZE)
+ return PCX_TOOBIG;
+
+ delete [] himap; himap = 0;
+ delete [] bitmap; bitmap = 0;
+
+ himap = new unsigned long [imagebytes];
+ if (himap == NULL)
+ return PCX_NOMEM;
+
+ memset(himap, 0, imagebytes*4);
+
+ for (int row = 0; row < height; row++) {
+ // RED, GREEN, BLUE
+ for (int plane = 2; plane >= 0; plane--) {
+ p = ((unsigned char*) himap) + width*row*4 + plane;
+ for (int col = 0; col < width; col++) {
+ if (mode == BYTEMODE) {
+ abyte = *fp++;
+
+ if (abyte > 0xbf) {
+ bytecount = abyte & 0x3f;
+ abyte = *fp++;
+ if (--bytecount > 0)
+ mode = RUNMODE;
+ }
+ }
+ else if (--bytecount == 0) {
+ mode = BYTEMODE;
+ }
+
+ *p = abyte;
+ p += 4;
+ }
+ }
+ }
+ }
+
+ return PCX_OK;
+}
+
+// +--------------------------------------------------------------------+
+
+int PcxImage::Save(char *filename)
+{
+ short mode=BYTEMODE;
+ FILE *f;
+
+ fopen_s(&f, filename,"wb");
+ if (f == NULL)
+ return PCX_NOFILE;
+
+ fwrite(&hdr, sizeof(PcxHeader), 1, f);
+
+ if (hdr.color_planes == 1) {
+ unsigned char *p = bitmap;
+ unsigned long total = imagebytes;
+ unsigned long row = 0;
+ unsigned char palette_marker = 12;
+
+ while (total) {
+ unsigned char* start = p;
+ unsigned char count = 0;
+
+ while (*start == *p && count < 0x3f && row < width) {
+ p++;
+ count++;
+ row++;
+ }
+
+ if (count > 1 || *start > 0xbf) {
+ unsigned char b[2];
+ b[0] = 0xc0 | count;
+ b[1] = *start;
+ fwrite(b, 2, 1, f);
+ }
+ else {
+ fwrite(start, 1, 1, f);
+ }
+
+ total -= count;
+
+ if (row == width)
+ row = 0;
+ }
+
+ fwrite(&palette_marker,1,1,f);
+ fwrite(pal,768,1,f);
+ }
+
+ // write 24-bit (TRUE COLOR) PCX file
+ else {
+ for (int row = 0; row < height; row++) {
+ for (int plane = 2; plane >= 0; plane--) {
+ unsigned long col = 0;
+ unsigned char* p = ((unsigned char*) himap) + width*row*4 + plane;
+
+ while (col < width) {
+ unsigned char* start = p;
+ unsigned char count = 0;
+
+ while (*start == *p && count < 0x3f && col < width) {
+ p += 4;
+ count++;
+ col++;
+ }
+
+ if (count > 1 || *start > 0xbf) {
+ unsigned char b[2];
+ b[0] = 0xc0 | count;
+ b[1] = *start;
+ fwrite(b, 2, 1, f);
+ }
+ else {
+ fwrite(start, 1, 1, f);
+ }
+ }
+ }
+ }
+ }
+
+ fclose(f);
+ return PCX_OK; // return success
+}
+
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