mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-12-25 20:30:31 +00:00
318 lines
7.5 KiB
C
318 lines
7.5 KiB
C
/* Converts 140x192 8-bit PCX file with correct palette to Apple II HGR */
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#include <stdio.h> /* For FILE I/O */
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#include <string.h> /* For strncmp */
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#include <fcntl.h> /* for open() */
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#include <unistd.h> /* for lseek() */
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#include <sys/stat.h> /* for file modes */
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#include <stdlib.h> /* free() */
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#define PCX_UNKNOWN 0
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#define PCX_8BIT 1
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#define PCX_24BIT 2
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static int debug=0;
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static int vmwGetPCXInfo(char *filename, int *xsize, int *ysize, int *type) {
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unsigned char pcx_header[128];
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int xmin,ymin,xmax,ymax,version=PCX_UNKNOWN,bpp,pcx_fd;
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int result;
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/* Open the file */
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pcx_fd=open(filename,O_RDONLY);
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if (pcx_fd<0) {
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fprintf(stderr,"ERROR! File \"%s\" not found!\n",filename);
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return -1;
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}
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lseek(pcx_fd,0,SEEK_SET);
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result=read(pcx_fd,&pcx_header,128);
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if (result<0) {
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fprintf(stderr,"Error! Could not read header from file %s\n",filename);
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return -1;
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}
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xmin=(pcx_header[5]<<8)+pcx_header[4];
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ymin=(pcx_header[7]<<8)+pcx_header[6];
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xmax=(pcx_header[9]<<8)+pcx_header[8];
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ymax=(pcx_header[11]<<8)+pcx_header[10];
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version=pcx_header[1];
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bpp=pcx_header[3];
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if (debug) {
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printf("Manufacturer: ");
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if (pcx_header[0]==10) printf("Zsoft\n");
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else printf("Unknown %i\n",pcx_header[0]);
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printf("Version: ");
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switch(version) {
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case 0: printf("2.5\n"); break;
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case 2: printf("2.8 w palette\n"); break;
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case 3: printf("2.8 w/o palette\n"); break;
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case 4: printf("Paintbrush for Windows\n"); break;
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case 5: printf("3.0+\n"); break;
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default: printf("Unknown %i\n",version);
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}
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printf("Encoding: ");
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if (pcx_header[2]==1) printf("RLE\n");
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else printf("Unknown %i\n",pcx_header[2]);
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printf("BitsPerPixelPerPlane: %i\n",bpp);
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printf("File goes from %i,%i to %i,%i\n",xmin,ymin,xmax,ymax);
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printf("Horizontal DPI: %i\n",(pcx_header[13]<<8)+pcx_header[12]);
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printf("Vertical DPI: %i\n",(pcx_header[15]<<8)+pcx_header[14]);
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printf("Number of colored planes: %i\n",pcx_header[65]);
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printf("Bytes per line: %i\n",(pcx_header[67]<<8)+pcx_header[66]);
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printf("Palette Type: %i\n",(pcx_header[69]<<8)+pcx_header[68]);
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printf("Hscreen Size: %i\n",(pcx_header[71]<<8)+pcx_header[70]);
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printf("Vscreen Size: %i\n",(pcx_header[73]<<8)+pcx_header[72]);
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}
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*xsize=(xmax-xmin+1);
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*ysize=(ymax-ymin+1);
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if ((version==5) && (bpp==8) && (pcx_header[65]==3)) *type=PCX_24BIT;
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else if (version==5) *type=PCX_8BIT;
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else *type=PCX_UNKNOWN;
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close(pcx_fd);
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return 0;
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}
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unsigned char colors[256];
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static int vmwLoadPCX(char *filename, unsigned char *framebuffer) {
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int pcx_fd;
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int x,y,i,numacross,xsize,ysize,xmin,ymin;
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unsigned int r,g,b;
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int xmax,ymax;
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unsigned char pcx_header[128];
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unsigned char temp_byte;
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int result;
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unsigned char *pointer=framebuffer;
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/* Open the file */
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pcx_fd=open(filename,O_RDONLY);
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if (pcx_fd<0) {
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fprintf(stderr,"ERROR! File \"%s\" not found!\n",filename);
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return -1;
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}
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/*************** DECODE THE HEADER *************************/
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result=read(pcx_fd,&pcx_header,128);
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if (result<0) {
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fprintf(stderr,"ERROR opening header of file %s\n",filename);
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}
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xmin=(pcx_header[5]<<8)+pcx_header[4];
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ymin=(pcx_header[7]<<8)+pcx_header[6];
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xmax=(pcx_header[9]<<8)+pcx_header[8];
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ymax=(pcx_header[11]<<8)+pcx_header[10];
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xsize=((xmax-xmin)+1);
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ysize=((ymax-ymin)+1);
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x=0; y=0;
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while (x<xsize*ysize) {
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/* read a byte */
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result=read(pcx_fd,&temp_byte,1);
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/* if > 0xc0, then it's a RLE byte */
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if (0xc0 == (temp_byte&0xc0)) {
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numacross=temp_byte&0x3f;
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result=read(pcx_fd,&temp_byte,1);
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for(i=0;i<numacross;i++) {
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*pointer=temp_byte;
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pointer++;
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x++;
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}
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}
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else {
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*pointer=temp_byte;
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pointer++;
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x++;
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}
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}
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/*Load Palette*/
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result=lseek(pcx_fd,-769,SEEK_END);
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result=read(pcx_fd,&temp_byte,1);
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if (temp_byte!=12) {
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fprintf(stderr,"Error! No palette found!\n");
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return -1;
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}
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for(i=0;i<255;i++) {
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result=read(pcx_fd,&temp_byte,1);
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r=temp_byte;
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result=read(pcx_fd,&temp_byte,1);
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g=temp_byte;
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result=read(pcx_fd,&temp_byte,1);
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b=temp_byte;
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#if 0
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int colors[8]={0, /* black 0 */
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1, /* purple */
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2, /* green */
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3, /* white 0 */
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0, /* black 1 */
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1, /* blue */
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2, /* orange */
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3, /* white */
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};
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#endif
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if ((r==0x00) && (g==0x00) && (b==0x00)) colors[i]=0; /* black */
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else
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if ((r==0xff) && (g==0xff) && (b==0xff)) colors[i]=3; /* white */
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else
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if ((r==0x1b) && (g==0x9a) && (b==0xfe)) colors[i]=0x81; /* blue */
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else
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if ((r==0xe4) && (g==0x34) && (b==0xfe)) colors[i]=0x41; /* purple */
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else
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if ((r==0xcd) && (g==0x5b) && (b==0x1)) colors[i]=0x82; /* orange */
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else
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if ((r==0x1b) && (g==0xcb) && (b==0x1)) colors[i]=0x42; /* green */
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else fprintf(stderr,"Unknown color %i %x %x %x\n",i,r,g,b);
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// printf("%i: 0x%x %x %x\n",i,r,g,b);
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}
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close(pcx_fd);
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return 0;
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}
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int main(int argc, char **argv) {
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int xsize=0,ysize=0,type,x,y;
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unsigned char *in_framebuffer,*pointer;
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unsigned char *out_framebuffer,*pcx,*hgr;
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char *filename;
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if (argc<2) {
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fprintf(stderr,"\nUsage: %s PCXFILE\n\n",argv[0]);
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exit(1);
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}
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filename=strdup(argv[1]);
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vmwGetPCXInfo(filename,&xsize,&ysize,&type);
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in_framebuffer=calloc(xsize*ysize,sizeof(unsigned char));
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if (in_framebuffer==NULL) {
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fprintf(stderr,"Error allocating memory!\n");
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return -1;
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}
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vmwLoadPCX(filename,in_framebuffer);
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pointer=in_framebuffer;
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#if 0
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for(y=0;y<ysize;y++) {
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for(x=0;x<xsize;x++) {
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printf("%1x",*pointer);
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pointer++;
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}
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printf("\n");
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}
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#endif
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out_framebuffer=calloc(8192,sizeof(unsigned char));
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if (out_framebuffer==NULL) {
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fprintf(stderr,"Error allocating memory!\n");
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return -1;
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}
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short fourteen_bits;
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int i,pal[2],yoffset=0;
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unsigned char byte1,byte2;
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int page,block,leaf;
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pcx=in_framebuffer;
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hgr=out_framebuffer;
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for(y=0;y<ysize;y++) {
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for(x=0;x<20;x++) {
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fourteen_bits=0;
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pal[0]=0; pal[1]=0;
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for(i=0;i<7;i++) {
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fourteen_bits|= ((colors[(*pcx)&0x7]&0x3)<<(i*2));
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/* choose which palette */
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pal[i/4]+= (colors[*pcx]&0x80) - (colors[*pcx]&0x40);
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pcx++;
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}
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byte1=(fourteen_bits&0x7f)|((pal[0]>0)<<7);
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byte2=((fourteen_bits>>7)&0x7f)|((pal[1]>0)<<7);
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page=(y%8);
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block=((y/8)%8);
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leaf=(y/64);
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yoffset=(page*1024) + (block*128) + (leaf*40);
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/*
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printf("%d %d = %x %x %x\n",x,y,fourteen_bits,yoffset,
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yoffset+(x*2));
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*/
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hgr=out_framebuffer+yoffset+(x*2);
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*hgr=byte1;
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*(hgr+1)=byte2;
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}
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}
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unsigned char header[4];
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/* assume HGR page 1 */
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int offset=8192;
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int file_size=8184;
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header[0]=offset&0xff;
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header[1]=(offset>>8)&0xff;
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header[2]=file_size&0xff;
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header[3]=(file_size>>8)&0xff;
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fwrite(header,sizeof(unsigned char),4,stdout);
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/* Don't need the last 8 bytes; makes it fit in one fewer disk sectors */
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fwrite(out_framebuffer,sizeof(unsigned char),8184,stdout);
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free(out_framebuffer);
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free(in_framebuffer);
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return 0;
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}
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