mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-12-28 09:30:41 +00:00
359 lines
6.0 KiB
C
359 lines
6.0 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdarg.h>
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#include "loadpng.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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/* Converts a PNG to RLE compressed data */
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int rle_original(int out_type, char *varname,
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int xsize,int ysize, unsigned char *image) {
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int run=0;
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int x;
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int last=-1,next;
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int size=0;
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int count=0;
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x=0;
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/* Write out xsize and ysize */
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if (out_type==OUTPUT_C) {
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fprintf(stdout,"unsigned char %s[]={\n",varname);
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fprintf(stdout,"\t0x%X,0x%X,",xsize,ysize);
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}
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else if (out_type==OUTPUT_ASM) {
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fprintf(stdout,"%s:",varname);
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fprintf(stdout,"\t.byte $%X,$%X",xsize,ysize);
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}
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size+=2;
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/* Get first top/bottom color pair */
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last=image[x];
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run++;
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x++;
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while(1) {
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/* get next top/bottom color pair */
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next=image[x];
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/* If color change (or too big) then output our run */
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/* Note 0xff for run length is special case meaning "finished" */
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if ((next!=last) || (run>253)) {
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/* handle new line */
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if (out_type==OUTPUT_C) {
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if (count==0) {
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printf("\n\t");
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}
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}
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else if (out_type==OUTPUT_ASM) {
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if (count==0) {
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printf("\n\t.byte ");
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}
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else {
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printf(", ");
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}
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}
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if (out_type==OUTPUT_C) {
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printf("0x%02X,0x%02X, ",run,last);
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}
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else if (out_type==OUTPUT_ASM) {
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printf("$%02X,$%02X",run,last);
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}
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else {
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printf("%c",run);
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printf("%c",last);
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}
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size+=2;
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count++;
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run=0;
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last=next;
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}
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x++;
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/* If we reach the end */
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if (x>=xsize*(ysize/2)) {
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run++;
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/* print tailing value */
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if (run!=0) {
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if (out_type==OUTPUT_C) {
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printf("0x%02X,0x%02X, ",run,last);
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}
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else if (out_type==OUTPUT_ASM) {
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if (count==0) {
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printf("\n\t.byte ");
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}
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else {
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printf(", ");
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}
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printf("$%02X,$%02X\n",run,last);
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} else {
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printf("%c",run);
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printf("%c",last);
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}
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size+=2;
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}
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break;
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}
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run++;
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if (count>6) count=0;
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}
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/* Print closing marker */
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if (out_type==OUTPUT_C) {
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fprintf(stdout,"0xFF,0xFF,");
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fprintf(stdout,"\t};\n");
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} else if (out_type==OUTPUT_ASM) {
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fprintf(stdout,"\t.byte $FF,$FF\n");
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}
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size+=2;
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return size;
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}
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/*****************************************/
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/* \/ \/ */
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/* Converts a PNG to RLE compressed data */
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/*****************************************/
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static int print_run(int count, int out_type, int run, int last) {
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int size=0;
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if (count==0) {
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if (out_type==OUTPUT_C) {
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printf("\n\t");
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}
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else if (out_type==OUTPUT_ASM) {
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printf("\n\t.byte ");
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}
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}
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else {
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if (out_type==OUTPUT_C) {
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}
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else if (out_type==OUTPUT_ASM) {
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printf(", ");
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}
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}
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if (run==1) {
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if (out_type==OUTPUT_C) {
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printf("0x%02X,",last);
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}
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else if (out_type==OUTPUT_ASM) {
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printf("$%02X",last);
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}
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else {
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printf("%c",last);
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}
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size++;
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}
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if (run==2) {
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if (out_type==OUTPUT_C) {
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printf("0x%02X,0x%02X,",last,last);
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}
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else if (out_type==OUTPUT_ASM) {
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printf("$%02X,$%02X",last,last);
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}
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else {
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printf("%c",last);
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printf("%c",last);
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}
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size+=2;
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}
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if ((run>2) && (run<16)) {
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if (out_type==OUTPUT_C) {
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printf("0x%02X,0x%02X,",0xA0|run,last);
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}
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else if (out_type==OUTPUT_ASM) {
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printf("$%02X,$%02X",0xA0|run,last);
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}
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else {
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printf("%c",0xA0|run);
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printf("%c",last);
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}
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size+=2;
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}
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if (run>=16) {
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if (out_type==OUTPUT_C) {
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printf("0x%02X,0x%02X,0x%02X,",0xA0,run,last);
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}
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else if (out_type==OUTPUT_ASM) {
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printf("$%02X,$%02X,$%02X",0xA0,run,last);
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}
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else {
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printf("%c",0xA0);
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printf("%c",run);
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printf("%c",last);
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}
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size+=3;
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}
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return size;
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}
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int rle_smaller(int out_type, char *varname,
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int xsize,int ysize, unsigned char *image) {
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int run=0;
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int x;
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int last=-1,next;
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int size=0;
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int count=0;
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x=0;
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/* Write out xsize and ysize */
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if (out_type==OUTPUT_C) {
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fprintf(stdout,"unsigned char %s[]={\n",varname);
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fprintf(stdout,"\t0x%X, /* ysize=%d */",xsize,ysize);
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}
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else if (out_type==OUTPUT_ASM) {
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fprintf(stdout,"%s:",varname);
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fprintf(stdout,"\t.byte $%X ; ysize=%d",xsize,ysize);
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} else {
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fprintf(stdout,"%c",xsize);
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}
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size+=2;
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/* Get first top/bottom color pair */
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last=image[x];
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run++;
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x++;
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while(1) {
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/* get next top/bottom color pair */
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next=image[x];
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if ((next&0xf0)==0xA0) {
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fprintf(stderr,"Warning! Using color A (grey2)!\n");
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next&=~0xf0;
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next|=0x50; // substitute grey1
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}
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/* If color change (or too big) then output our run */
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/* Note 0xff for run length is special case meaning "finished" */
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if ((next!=last) || (run>254)) {
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size+=print_run(count,out_type,run,last);
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count++;
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run=0;
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last=next;
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}
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x++;
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/* If we reach the end */
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if (x>=xsize*(ysize/2)) {
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run++;
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size+=print_run(count,out_type,run,last);
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break;
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}
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run++;
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if (count>6) count=0;
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}
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/* Print closing marker */
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if (out_type==OUTPUT_C) {
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fprintf(stdout,"0xA1,");
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fprintf(stdout,"\t};\n");
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} else if (out_type==OUTPUT_ASM) {
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fprintf(stdout,"\n\t.byte $A1\n");
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} else {
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fprintf(stdout,"%c",0xA1);
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}
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size+=1;
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return size;
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}
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/* Converts a PNG to RLE compressed data */
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int main(int argc, char **argv) {
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unsigned char *image;
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int xsize,ysize;
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int size=0;
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int out_type=OUTPUT_C;
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if (argc<4) {
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fprintf(stderr,"Usage:\t%s type INFILE varname\n\n",argv[0]);
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fprintf(stderr,"\ttype: c or asm or raw\n");
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fprintf(stderr,"\tvarname: label for graphic\n");
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fprintf(stderr,"\n");
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exit(-1);
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}
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if (!strcmp(argv[1],"c")) {
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out_type=OUTPUT_C;
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}
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else if (!strcmp(argv[1],"asm")) {
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out_type=OUTPUT_ASM;
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}
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else if (!strcmp(argv[1],"raw")) {
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out_type=OUTPUT_RAW;
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}
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if (loadpng(argv[2],&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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// size=rle_original(out_type,argv[3],
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// xsize,ysize,image);
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size=rle_smaller(out_type,argv[3],
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xsize,ysize,image);
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fprintf(stderr,"Size %d bytes\n",size);
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return 0;
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}
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