dos33fsprogs/hgr-utils/png2dhgr.c
2020-01-02 23:51:05 -05:00

449 lines
9.9 KiB
C

/* Converts 140x192 8-bit PNG file with correct palette to Apple II DHGR */
/* http://www.battlestations.zone/2017/04/apple-ii-double-hi-res-from-ground-up_12.html */
#define VERSION "0.0.1"
#include <stdio.h> /* For FILE I/O */
#include <string.h> /* For strncmp */
#include <fcntl.h> /* for open() */
#include <unistd.h> /* for lseek() */
#include <sys/stat.h> /* for file modes */
#include <stdlib.h> /* free() */
#include <png.h>
#define OUTPUT_C 0
#define OUTPUT_ASM 1
#define OUTPUT_RAW 2
/* If you want default black a different color try the below */
/* Useful if you are trying to xdraw to get red/blue */
#if 0
/* Default is BLACK0 */
#define DEFAULT_BLACK -1
#else
/* DEFAULT is BLACK1 */
#define DEFAULT_BLACK 1
#endif
static int debug=0;
static int convert_color(int color) {
int c=0;
switch(color) {
case 0x000000: c=0; break; /* black */
case 0xe31e60: c=1; break; /* magenta */
case 0x604ebd: c=2; break; /* dark blue */
case 0xff44fd: c=3; break; /* purple */
case 0x00a360: c=4; break; /* dark green */
case 0x9c9c9c: c=5; break; /* grey 1 */
case 0x14cffd: c=6; break; /* medium blue */
case 0xd0c3ff: c=7; break; /* light blue */
case 0x607203: c=8; break; /* brown */
case 0xff6a3c: c=9; break; /* orange */
case 0x9d9d9d: c=10; break; /* grey 2 */
case 0xffa0d0: c=11; break; /* pink */
case 0x14f53c: c=12; break; /* bright green */
case 0xd0dd8d: c=13; break; /* yellow */
case 0x72ffd0: c=14; break; /* aqua */
case 0xffffff: c=15; break; /* white */
default:
fprintf(stderr,"Unknown color %x\n",color);
break;
}
return c;
}
/* expects a PNG */
int loadpng(char *filename,
unsigned char **image_ptr, int *xsize, int *ysize) {
int x,y;
int color;
FILE *infile;
unsigned char *image,*out_ptr;
int width, height;
int a2_color;
png_byte bit_depth;
png_structp png_ptr;
png_infop info_ptr;
png_bytep *row_pointers;
png_byte color_type;
int row_bytes,bytes_per_pixel;
unsigned char header[8];
/* open file and test for it being a png */
infile = fopen(filename, "rb");
if (infile==NULL) {
fprintf(stderr,"Error! Could not open %s\n",filename);
return -1;
}
/* Check the header */
fread(header, 1, 8, infile);
if (png_sig_cmp(header, 0, 8)) {
fprintf(stderr,"Error! %s is not a PNG file\n",filename);
return -1;
}
/* initialize stuff */
png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png_ptr) {
fprintf(stderr,"Error create_read_struct\n");
exit(-1);
}
info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr) {
fprintf(stderr,"Error png_create_info_struct\n");
exit(-1);
}
png_init_io(png_ptr, infile);
png_set_sig_bytes(png_ptr, 8);
png_read_info(png_ptr, info_ptr);
width = png_get_image_width(png_ptr, info_ptr);
height = png_get_image_height(png_ptr, info_ptr);
*xsize=width;
*ysize=height;
color_type = png_get_color_type(png_ptr, info_ptr);
bit_depth = png_get_bit_depth(png_ptr, info_ptr);
if (width!=140) {
fprintf(stderr,"Unknown width %d\n",width);
return -1;
}
if (height!=192) {
fprintf(stderr,"Unknown height %d\n",height);
return -1;
}
image=calloc(width*height,sizeof(unsigned char));
if (image==NULL) {
fprintf(stderr,"Error allocating image\n");
return -1;
}
if (debug) {
fprintf(stderr,"PNG: width=%d height=%d depth=%d\n",
width,height,bit_depth);
if (color_type==PNG_COLOR_TYPE_RGB) {
fprintf(stderr,"Type RGB\n");
}
else if (color_type==PNG_COLOR_TYPE_RGB_ALPHA) {
fprintf(stderr,"Type RGBA\n");
}
else if (color_type==PNG_COLOR_TYPE_PALETTE) {
fprintf(stderr,"Type palette\n");
}
}
/* If palette, expand to RGB automatically */
if (color_type == PNG_COLOR_TYPE_PALETTE) {
png_set_expand(png_ptr);
}
png_read_update_info(png_ptr, info_ptr);
row_bytes = png_get_rowbytes(png_ptr, info_ptr);
// *pChannels = (int)png_get_channels(png_ptr, info_ptr);
bytes_per_pixel=row_bytes/width;
if (debug) {
fprintf(stderr,"Rowbytes=%d bytes per pixel=%d\n",
row_bytes,row_bytes/width);
}
row_pointers = (png_bytep*) malloc(sizeof(png_bytep) * height);
for (y=0; y<height; y++) {
row_pointers[y] = (png_byte*)malloc(row_bytes);
}
png_read_image(png_ptr, row_pointers);
png_read_end(png_ptr, NULL);
fclose(infile);
out_ptr=image;
for(y=0;y<height;y++) {
for(x=0;x<width;x++) {
color= (row_pointers[y][x*bytes_per_pixel]<<16)+
(row_pointers[y][x*bytes_per_pixel+1]<<8)+
(row_pointers[y][x*bytes_per_pixel+2]);
// if (debug) {
// fprintf(stderr,"%x ",color);
// }
a2_color=convert_color(color);
if (debug) {
fprintf(stderr,"%x",a2_color);
}
*out_ptr=a2_color;
out_ptr++;
}
if (debug) fprintf(stderr,"\nNR: ");
}
*image_ptr=image;
return 0;
}
/* Converts a PNG to RAW 8K Hires Image */
static void print_help(char *name,int version) {
printf("\npng2dhgr version %s\n",VERSION);
if (version) exit(1);
printf("\nUsage: %s [-r] [-s] PNGFILE OUTBASE\n\n",name);
printf("\t[-r] raw, don't prepend with BLOAD addr/size\n");
printf("\t[-s] short, leave off bottom text area\n");
printf("\n");
exit(1);
}
static int hgr_offset_table[48]={
0x0000,0x0080,0x0100,0x0180,0x0200,0x0280,0x0300,0x0380,
0x0028,0x00A8,0x0128,0x01A8,0x0228,0x02A8,0x0328,0x03A8,
0x0050,0x00D0,0x0150,0x01D0,0x0250,0x02D0,0x0350,0x03D0,
};
static char aux1_colors[16]={
0x00,0x08,0x44,0x4c,0x22,0x2a,0x66,0x6e,
0x11,0x19,0x55,0x5d,0x33,0x3b,0x77,0x7f};
static char main1_colors[16]={
0x00,0x11,0x08,0x19,0x44,0x55,0x4c,0x5d,
0x22,0x33,0x2a,0x3b,0x66,0x77,0x6e,0x7f};
static char aux2_colors[16]={
0x00,0x22,0x11,0x33,0x08,0x2a,0x19,0x3b,
0x44,0x66,0x55,0x77,0x4c,0x6e,0x5d,0x7f};
static char main2_colors[16]={
0x00,0x44,0x22,0x66,0x11,0x55,0x33,0x77,
0x08,0x4c,0x2a,0x6e,0x19,0x5d,0x3b,0x7f};
static char flipped_colors[16]={
/* black */ 0x00,
/* magenta */ 0x08,
/* dark blue */ 0x01,
/* purple */ 0x09,
/* dark green */0x02,
/* grey 1 */ 0x0a,
/* med blue */ 0x03,
/* lt blue */ 0x0b,
/* brown */ 0x04,
/* orange */ 0x0c,
/* grey2 */ 0x05,
/* pink */ 0x0d,
/* br green */ 0x06,
/* yellow */ 0x0e,
/* aqua */ 0x07,
/* white */ 0x0f,
};
static int hgr_offset(int y) {
int temp,temp2,address;
temp=y/8;
temp2=y%8;
temp2=temp2*0x400;
address=hgr_offset_table[temp]+temp2;
return address;
}
static unsigned char apple2_aux[8192],apple2_bin[8192];
int main(int argc, char **argv) {
int xsize=0,ysize=0;
int c,x,y,color1;
unsigned char *image;
unsigned char colors[7];
char *filename,*base;
char outfile[BUFSIZ];
FILE *aux,*bin;
/* Parse command line arguments */
while ( (c=getopt(argc, argv, "hvd") ) != -1) {
switch(c) {
case 'h':
print_help(argv[0],0);
break;
case 'v':
print_help(argv[0],1);
break;
case 'd':
debug=1;
break;
default:
print_help(argv[0],0);
break;
}
}
if (optind>=argc) {
printf("ERROR: Was expecting filename!\n");
exit(1);
}
filename=strdup(argv[optind]);
if (optind+1>=argc) {
base=strdup("OUT");
}
else {
base=strdup(argv[optind+1]);
}
memset(apple2_aux,0,8192);
memset(apple2_bin,0,8192);
if (loadpng(filename,&image,&xsize,&ysize)<0) {
fprintf(stderr,"Error loading png!\n");
exit(-1);
}
fprintf(stderr,"Loaded image %d by %d\n",xsize,ysize);
for(y=0;y<192;y++) {
for(x=0;x<20;x++) {
colors[0]=image[y*140+x*7+0];
colors[1]=image[y*140+x*7+1];
colors[2]=image[y*140+x*7+2];
colors[3]=image[y*140+x*7+3];
colors[4]=image[y*140+x*7+4];
colors[5]=image[y*140+x*7+5];
colors[6]=image[y*140+x*7+6];
#if 0
color1=aux1_colors[colors[0]]&0xf;
color1|=(aux1_colors[colors[1]]<<4)&0x7f;
apple2_aux[hgr_offset(y)+(x*2)+0]=color1;
color1=(main1_colors[colors[1]]>>3)&0x1;
color1|=(main1_colors[colors[2]]<<1)&0x1e;
color1|=(main1_colors[colors[3]]<<5)&0x60;
apple2_bin[hgr_offset(y)+(x*2)+0]=color1;
color1=(aux2_colors[colors[3]]>>2)&0x3;
color1|=(aux2_colors[colors[4]]<<2)&0x3c;
color1|=(aux2_colors[colors[5]]<<6)&0x40;
apple2_aux[hgr_offset(y)+(x*2)+1]=color1;
color1=(main2_colors[colors[5]]>>1)&0x7;
color1|=(main2_colors[colors[6]]<<3)&0x78;
apple2_bin[hgr_offset(y)+(x*2)+1]=color1;
#endif
#if 0
color1=colors[0]&0xf;
color1|=(colors[1]<<4)&0x7f;
apple2_aux[hgr_offset(y)+(x*2)+0]=color1;
color1=(colors[1]>>3)&0x1;
color1|=(colors[2]<<1)&0x1e;
color1|=(colors[3]<<5)&0x60;
apple2_bin[hgr_offset(y)+(x*2)+0]=color1;
color1=(colors[3]>>2)&0x3;
color1|=(colors[4]<<2)&0x3c;
color1|=(colors[5]<<6)&0x40;
apple2_aux[hgr_offset(y)+(x*2)+1]=color1;
color1=(colors[5]>>1)&0x7;
color1|=(colors[6]<<3)&0x78;
apple2_bin[hgr_offset(y)+(x*2)+1]=color1;
#endif
#if 1
// 33 4c
// 0011 0011 0100 1100
// PDDC CCCB PGGG GFFF
// B=1XXX
// C=1001
// D=XX01
// F=100X
// G=1001
color1=flipped_colors[colors[0]]&0xf;
color1|=(flipped_colors[colors[1]]<<4)&0x7f;
apple2_aux[hgr_offset(y)+(x*2)+0]=color1;
color1=(flipped_colors[colors[1]]>>3)&0x1;
color1|=(flipped_colors[colors[2]]<<1)&0x1e;
color1|=(flipped_colors[colors[3]]<<5)&0x60;
apple2_bin[hgr_offset(y)+(x*2)+0]=color1;
color1=(flipped_colors[colors[3]]>>2)&0x3;
color1|=(flipped_colors[colors[4]]<<2)&0x3c;
color1|=(flipped_colors[colors[5]]<<6)&0x40;
apple2_aux[hgr_offset(y)+(x*2)+1]=color1;
color1=(flipped_colors[colors[5]]>>1)&0x7;
color1|=(flipped_colors[colors[6]]<<3)&0x78;
apple2_bin[hgr_offset(y)+(x*2)+1]=color1;
#endif
}
}
sprintf(outfile,"%s.AUX",base);
aux=fopen(outfile,"w");
if (aux==NULL) {
fprintf(stderr,"Error opening %s\n",outfile);
exit(1);
}
fwrite(apple2_aux,8192,sizeof(unsigned char),aux);
fclose(aux);
sprintf(outfile,"%s.BIN",base);
bin=fopen(outfile,"w");
if (bin==NULL) {
fprintf(stderr,"Error opening %s\n",outfile);
exit(1);
}
fwrite(apple2_bin,8192,sizeof(unsigned char),bin);
fclose(bin);
return 0;
}