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dos33fsprogs/utils/hgr-utils/hgr_make_sprite.c

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/* Grabs part of 280x192 8-bit PNG file with correct palette to */
/* Sprites suitable for Apple II HGR */
#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,color_warnings=0;
static int convert_color(int color) {
int c=0;
switch(color) {
#if 0
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 */
#endif
/* These use the questionable palette my older code used */
/* Also handle the newer one */
/* Bitflipped because HGR is backwards, woz is crazy */
case 0x000000: c=0; break; /* black1 */
case 0x1bcb01: c=2; break; /* bright green */
case 0x14f53c: c=2; break; /* bright green */
case 0xe434fe: c=1; break; /* magenta */
case 0xe31e60: c=1; break; /* magenta */
case 0xffffff: c=3; break; /* white1 */
case 0xcd5b01: c=6; break; /* orange */
case 0xff6a3c: c=6; break; /* orange */
case 0x1b9afe: c=5; break; /* medium blue */
case 0x14cffd: c=5; break; /* medium blue */
case 0x010101: c=4; break; /* black2 */
case 0xfefefe: c=7; break; /* white2 */
default:
fprintf(stderr,"Unknown color %x\n",color);
break;
}
return c;
}
/* expects a PNG where the xsize is *2 */
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!=280) {
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("\n%s version %s\n",VERSION,name);
if (version) exit(1);
printf("\nUsage: %s [-h] [-v] [-d] [-l label] PNGFILE x1 y1 x2 y2\n\n",name);
printf("\t[-d] debug\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 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;
}
/* Count both black/white variants */
static int color_high(int color) {
if (color>3) return 1;
return 0;
}
static int color_low(int color) {
if (color<4) return 1;
return 0;
}
/* also count any black/white */
static int color_high_bw(int color) {
if (color>3) return 1;
if ((color==0) || (color==3)) return 1;
return 0;
}
static int color_low_bw(int color) {
if (color<4) return 1;
if ((color==4) || (color==7)) return 1;
return 0;
}
static int colors_to_bytes(unsigned char colors[14],
unsigned char *byte1,
unsigned char *byte2) {
int i;
int highbit1=0,highbit2=0,lowbit1=0,lowbit2=0;
int bwhigh1=0,bwlow1=0;
int bwhigh2=0,bwlow2=0;
int hb1,hb2;
int error=0;
*byte1=0;
*byte2=0;
for(i=0;i<7;i++) {
highbit1+=color_high(colors[i]);
lowbit1+=color_low(colors[i]);
bwhigh1+=color_high_bw(colors[i]);
bwlow1+=color_low_bw(colors[i]);
}
for(i=7;i<14;i++) {
highbit2+=color_high(colors[i]);
lowbit2+=color_low(colors[i]);
bwhigh2+=color_high_bw(colors[i]);
bwlow2+=color_low_bw(colors[i]);
}
if (highbit1==7) hb1=1; // all were high bit set
else if (lowbit1==7) hb1=0; // all were lo bit set
else if (bwhigh1==7) hb1=1; // ignore black/white
else if (bwlow1==7) hb1=0;
else {
error=1;
if (bwhigh1>bwlow1) hb1=1;
else hb1=0;
}
if (highbit2==7) hb2=1; // all were high bit set
else if (lowbit2==7) hb2=0; // all were lo bit set
else if (bwhigh2==7) hb2=1; // ignore black/white
else if (bwlow2==7) hb2=0;
else {
error=1;
if (bwhigh2>bwlow2) hb2=1;
else hb2=0;
}
/*
0 0 0 0 -> 00 00
1 1 1 1 -> 01 01
2 2 2 2 -> 10 10
3 3 3 3 -> 11 11
1 3 3 1 -> 01 11
1 1 2 2 3 3 0 -> 0 11 10 01
*/
*byte1|=(colors[0]&1)<<0;
*byte1|=(colors[1]&2)<<0;
*byte1|=(colors[2]&1)<<2;
*byte1|=(colors[3]&2)<<2;
*byte1|=(colors[4]&1)<<4;
*byte1|=(colors[5]&2)<<4;
*byte1|=(colors[6]&1)<<6;
*byte1|=hb1<<7;
*byte2|=(colors[7]&2)>>1;
*byte2|=(colors[8]&1)<<1;
*byte2|=(colors[9]&2)<<1;
*byte2|=(colors[10]&1)<<3;
*byte2|=(colors[11]&2)<<3;
*byte2|=(colors[12]&1)<<5;
*byte2|=(colors[13]&2)<<5;
*byte2|=hb2<<7;
return error;
}
static unsigned char apple2_image[8192];
int main(int argc, char **argv) {
int xsize=0,ysize=0,error;
int printsize=0;
int c,x,y,z,color1;
unsigned char *image;
unsigned char byte1,byte2,colors[14];
char label_string[BUFSIZ];
int x1,y1,x2,y2;
int xs;
char *filename;
strncpy(label_string,"sprite",BUFSIZ);
/* Parse command line arguments */
while ( (c=getopt(argc, argv, "hvdsl:") ) != -1) {
switch(c) {
case 'h':
print_help(argv[0],0);
break;
case 'v':
print_help(argv[0],1);
break;
case 'd':
debug=1;
break;
case 's':
printsize=1;
break;
case 'l':
strncpy(label_string,optarg,BUFSIZ-1);
break;
default:
print_help(argv[0],0);
break;
}
}
if (argc-optind<5) {
printf("ERROR: Was expecting filename and co-ords!\n");
//printf("\targc=%d optind=%d\n",argc,optind);
exit(1);
}
filename=strdup(argv[optind]);
x1=atoi(argv[optind+1]);
y1=atoi(argv[optind+2]);
x2=atoi(argv[optind+3]);
y2=atoi(argv[optind+4]);
memset(apple2_image,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++) {
for(z=0;z<14;z++) {
color1=image[y*280+x*14+z];
// if (color1!=color2) {
// fprintf(stderr,"Warning: color at %d x %d doesn't match\n",
// x*14+z*2,y);
//
// }
colors[z]=color1;
}
error=colors_to_bytes(colors,&byte1,&byte2);
if (error!=0) {
color_warnings++;
fprintf(stderr,"Warning: mixing colors at %d x %d\n",
x*14+error*7,y);
}
apple2_image[hgr_offset(y)+(x*2)+0]=byte1;
apple2_image[hgr_offset(y)+(x*2)+1]=byte2;
}
}
if (x1%7) {
fprintf(stderr,"Warning! x1 should be a multiple of 7\n");
}
printf("; %d %d %d %d\n",x1,y1,x2,y2);
printf("%s:\n",label_string);
if (printsize) {
xs=(x2/7-x1/7);
if (!((x2%7==0)&&(x1%7==0))) xs++;
printf("\t.byte $%02X,$%02X\n",
xs,y2-y1);
}
for(y=y1;y<y2;y++) {
printf("\t.byte ");
for(x=x1/7;x<=x2/7;x++) {
printf("$%02X",apple2_image[hgr_offset(y)+x]);
if (x!=x2/7) printf(",");
}
printf("\n");
}
fprintf(stderr,"Total warnings: %d\n",color_warnings);
return 0;
}
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