mirror of
https://github.com/deater/dos33fsprogs.git
synced 2026-04-24 05:25:35 +00:00
Vince Weaver
395 lines
8.1 KiB
C
395 lines
8.1 KiB
C
/* Converts 140x192 8-bit PNG file with correct palette to */
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/* compact 4-color Apple II DHGR */
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/* colors should be 0 / 5 / 7 / 15 */
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/* black, grey, light blue, white */
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/* Use fo rewind2 demo */
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#define VERSION "0.0.1"
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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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#include <png.h>
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#define OUTPUT_C 0
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#define OUTPUT_ASM 1
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#define OUTPUT_RAW 2
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/* If you want default black a different color try the below */
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/* Useful if you are trying to xdraw to get red/blue */
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#if 0
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/* Default is BLACK0 */
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#define DEFAULT_BLACK -1
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#else
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/* DEFAULT is BLACK1 */
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#define DEFAULT_BLACK 1
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#endif
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static int debug=0;
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static int convert_color(int color) {
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int c=0;
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switch(color) {
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case 0x000000: c=0; break; /* black */
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case 0xe31e60: c=1; break; /* magenta */
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case 0x604ebd: c=2; break; /* dark blue */
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case 0xff44fd: c=3; break; /* purple */
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case 0x00a360: c=4; break; /* dark green */
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case 0x9c9c9c: c=5; break; /* grey 1 */
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case 0x14cffd: c=6; break; /* medium blue */
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case 0xd0c3ff: c=7; break; /* light blue */
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case 0x607203: c=8; break; /* brown */
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case 0xff6a3c: c=9; break; /* orange */
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case 0x9d9d9d: c=10; break; /* grey 2 */
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case 0xffa0d0: c=11; break; /* pink */
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case 0x14f53c: c=12; break; /* bright green */
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case 0xd0dd8d: c=13; break; /* yellow */
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case 0x72ffd0: c=14; break; /* aqua */
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case 0xffffff: c=15; break; /* white */
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default:
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fprintf(stderr,"Unknown color %x\n",color);
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break;
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}
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return c;
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}
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/* expects a PNG */
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int loadpng(char *filename,
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unsigned char **image_ptr, int *xsize, int *ysize) {
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int x,y;
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int color;
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FILE *infile;
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unsigned char *image,*out_ptr;
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int width, height;
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int a2_color;
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int skip=1;
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png_byte bit_depth;
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png_structp png_ptr;
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png_infop info_ptr;
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png_bytep *row_pointers;
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png_byte color_type;
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int row_bytes,bytes_per_pixel;
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unsigned char header[8];
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/* open file and test for it being a png */
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infile = fopen(filename, "rb");
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if (infile==NULL) {
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fprintf(stderr,"Error! Could not open %s\n",filename);
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return -1;
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}
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/* Check the header */
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fread(header, 1, 8, infile);
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if (png_sig_cmp(header, 0, 8)) {
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fprintf(stderr,"Error! %s is not a PNG file\n",filename);
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return -1;
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}
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/* initialize stuff */
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png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
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if (!png_ptr) {
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fprintf(stderr,"Error create_read_struct\n");
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exit(-1);
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}
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info_ptr = png_create_info_struct(png_ptr);
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if (!info_ptr) {
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fprintf(stderr,"Error png_create_info_struct\n");
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exit(-1);
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}
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png_init_io(png_ptr, infile);
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png_set_sig_bytes(png_ptr, 8);
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png_read_info(png_ptr, info_ptr);
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width = png_get_image_width(png_ptr, info_ptr);
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height = png_get_image_height(png_ptr, info_ptr);
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*xsize=width;
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*ysize=height;
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color_type = png_get_color_type(png_ptr, info_ptr);
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bit_depth = png_get_bit_depth(png_ptr, info_ptr);
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if ((width!=140) && (width!=280)) {
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fprintf(stderr,"Unknown width %d\n",width);
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return -1;
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}
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if (width==280) {
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skip=2;
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}
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if (height!=192) {
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fprintf(stderr,"Unknown height %d\n",height);
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return -1;
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}
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image=calloc(width*height,sizeof(unsigned char));
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if (image==NULL) {
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fprintf(stderr,"Error allocating image\n");
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return -1;
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}
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if (debug) {
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fprintf(stderr,"PNG: width=%d height=%d depth=%d\n",
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width,height,bit_depth);
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if (color_type==PNG_COLOR_TYPE_RGB) {
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fprintf(stderr,"Type RGB\n");
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}
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else if (color_type==PNG_COLOR_TYPE_RGB_ALPHA) {
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fprintf(stderr,"Type RGBA\n");
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}
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else if (color_type==PNG_COLOR_TYPE_PALETTE) {
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fprintf(stderr,"Type palette\n");
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}
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}
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/* If palette, expand to RGB automatically */
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if (color_type == PNG_COLOR_TYPE_PALETTE) {
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png_set_expand(png_ptr);
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}
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png_read_update_info(png_ptr, info_ptr);
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row_bytes = png_get_rowbytes(png_ptr, info_ptr);
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// *pChannels = (int)png_get_channels(png_ptr, info_ptr);
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bytes_per_pixel=row_bytes/width;
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if (debug) {
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fprintf(stderr,"Rowbytes=%d bytes per pixel=%d\n",
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row_bytes,row_bytes/width);
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}
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row_pointers = (png_bytep*) malloc(sizeof(png_bytep) * height);
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for (y=0; y<height; y++) {
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row_pointers[y] = (png_byte*)malloc(row_bytes);
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}
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png_read_image(png_ptr, row_pointers);
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png_read_end(png_ptr, NULL);
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fclose(infile);
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out_ptr=image;
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for(y=0;y<height;y++) {
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for(x=0;x<width;x+=skip) {
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color= (row_pointers[y][x*bytes_per_pixel]<<16)+
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(row_pointers[y][x*bytes_per_pixel+1]<<8)+
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(row_pointers[y][x*bytes_per_pixel+2]);
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// if (debug) {
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// fprintf(stderr,"%x ",color);
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// }
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a2_color=convert_color(color);
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if (debug) {
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fprintf(stderr,"%x",a2_color);
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}
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*out_ptr=a2_color;
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out_ptr++;
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}
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if (debug) fprintf(stderr,"\nNR: ");
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}
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*image_ptr=image;
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return 0;
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}
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/* Converts a PNG to RAW 8K Hires Image */
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static void print_help(char *name,int version) {
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printf("\npng2dhgr version %s\n",VERSION);
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if (version) exit(1);
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printf("\nUsage: %s [-r] [-s] PNGFILE OUTBASE\n\n",name);
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printf("\t[-r] raw, don't prepend with BLOAD addr/size\n");
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printf("\t[-s] short, leave off bottom text area\n");
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printf("\n");
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exit(1);
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}
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#if 0
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static int hgr_offset_table[48]={
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0x0000,0x0080,0x0100,0x0180,0x0200,0x0280,0x0300,0x0380,
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0x0028,0x00A8,0x0128,0x01A8,0x0228,0x02A8,0x0328,0x03A8,
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0x0050,0x00D0,0x0150,0x01D0,0x0250,0x02D0,0x0350,0x03D0,
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};
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static char aux1_colors[16]={
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0x00,0x08,0x44,0x4c,0x22,0x2a,0x66,0x6e,
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0x11,0x19,0x55,0x5d,0x33,0x3b,0x77,0x7f};
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static char main1_colors[16]={
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0x00,0x11,0x08,0x19,0x44,0x55,0x4c,0x5d,
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0x22,0x33,0x2a,0x3b,0x66,0x77,0x6e,0x7f};
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static char aux2_colors[16]={
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0x00,0x22,0x11,0x33,0x08,0x2a,0x19,0x3b,
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0x44,0x66,0x55,0x77,0x4c,0x6e,0x5d,0x7f};
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static char main2_colors[16]={
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0x00,0x44,0x22,0x66,0x11,0x55,0x33,0x77,
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0x08,0x4c,0x2a,0x6e,0x19,0x5d,0x3b,0x7f};
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static char flipped_colors[16]={
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/* black */ 0x00,
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/* magenta */ 0x08,
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/* dark blue */ 0x01,
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/* purple */ 0x09,
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/* dark green */0x02,
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/* grey 1 */ 0x0a,
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/* med blue */ 0x03,
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/* lt blue */ 0x0b,
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/* brown */ 0x04,
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/* orange */ 0x0c,
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/* grey2 */ 0x05,
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/* pink */ 0x0d,
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/* br green */ 0x06,
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/* yellow */ 0x0e,
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/* aqua */ 0x07,
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/* white */ 0x0f,
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};
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static int hgr_offset(int y) {
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int temp,temp2,address;
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temp=y/8;
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temp2=y%8;
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temp2=temp2*0x400;
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address=hgr_offset_table[temp]+temp2;
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return address;
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}
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#endif
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int main(int argc, char **argv) {
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int xsize=0,ysize=0;
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int c,x,y;
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unsigned char *image;
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unsigned char colors[8];
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char *filename,*base;
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char outfile[BUFSIZ];
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FILE *aux;
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/* Parse command line arguments */
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while ( (c=getopt(argc, argv, "hvd") ) != -1) {
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switch(c) {
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case 'h':
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print_help(argv[0],0);
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break;
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case 'v':
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print_help(argv[0],1);
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break;
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case 'd':
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debug=1;
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break;
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default:
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print_help(argv[0],0);
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break;
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}
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}
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if (optind>=argc) {
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printf("ERROR: Was expecting filename!\n");
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exit(1);
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}
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filename=strdup(argv[optind]);
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if (optind+1>=argc) {
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base=strdup("OUT");
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}
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else {
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base=strdup(argv[optind+1]);
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}
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if (loadpng(filename,&image,&xsize,&ysize)<0) {
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fprintf(stderr,"Error loading png!\n");
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exit(-1);
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}
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fprintf(stderr,"Loaded image %d by %d\n",xsize,ysize);
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//
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// 4 bytes = 7 pixels. 20 bytes across display
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// 2 bits per color, so 140/4 = 35 (35 bytes per row)
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sprintf(outfile,"%s.packed",base);
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aux=fopen(outfile,"w");
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if (aux==NULL) {
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fprintf(stderr,"Error opening %s\n",outfile);
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exit(1);
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}
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int out_byte,q;
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for(y=0;y<192;y++) {
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for(x=0;x<35;x++) {
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out_byte=0;
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for(q=0;q<4;q++) {
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colors[q]=image[y*140+x*4+q];
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switch(colors[q]) {
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case 0: colors[q]=0;
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break;
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case 5: colors[q]=1;
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break;
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case 7: colors[q]=2;
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break;
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case 15: colors[q]=3;
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break;
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default: printf("Bad color %d\n",colors[q]);
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colors[q]=0;
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break;
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}
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out_byte>>=2;
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out_byte|=(colors[q]<<6);
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}
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fputc(out_byte,aux);
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}
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}
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fclose(aux);
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return 0;
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}
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