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#include "mdlread.hpp"
#include "macs.hpp"
#include "linked.hpp"
#include "system.h"
#include <stdio.h>
// write_mdl take an array of pointer to images and a palette
// and the generates a Moving DeLight file format containing all the
// images. Note, only the mode 320x200x256 is sopprted here for saving
// images. All images should be sized so they will fit on an mdl screen
// but no checking of that is done hhere.
void write_mdl(image **images, short total_images, palette *pal,char *fn,
short firstpage, short images_per_page)
{
FILE *fp;
char buf[18];
unsigned short xy[2],x;
char name[13],page;
unsigned char *c;
short i;
palette *np;
clear_errors();
CONDITION(images && pal && fn && total_images>0,"bad parms");
CONDITION(pal->pal_size()==256,"MDL write only support 256 color images");
fp=fopen(fn,"wb");
if (!fp) set_error(imWRITE_ERROR);
else
{ strcpy(buf,"JC20"); // Signature for mdl file
buf[4]=255; // 255 is graph driver 320x200x256
buf[5]=0; // graph mode 0 for this graph driver
buf[6]=19; // the BIOS mode is 19
fwrite(buf,7,1,fp);
np=pal->copy(); // make a copy before we change
np->shift(-COLOR_SHIFT); // PC palette don't have 8 bit color regs
fwrite(np->addr(),1,768,fp);
delete np; // destroy the copy me made
memset(buf,0,11); // 11 reserved bytes (0) follow
fwrite(buf,11,1,fp);
for (i=0;i<total_images;i++)
{
memset(buf,0,6); // each image has 6 bytes of reserved 0
fwrite(buf,6,1,fp);
xy[0]=int_to_intel(i%100+20); xy[1]=int_to_intel(30); // the x and y position on the screen
fwrite(xy,4,1,fp);
sprintf(name,"JC%-10d",i); // set the name of the image
fwrite(name,12,1,fp);
page=firstpage+i/images_per_page;
fwrite(&page,1,1,fp); // put all of the image on the first page
xy[0]=int_to_intel(images[i]->width()*images[i]->height()+4); // calc the size of the image
fwrite(xy,2,1,fp);
xy[0]=int_to_intel(images[i]->width());
fwrite(xy,2,1,fp);
xy[0]=int_to_intel(images[i]->height());
fwrite(xy,2,1,fp);
for (x=0;x<(unsigned short)images[i]->height();x++) // write all the scan_lines for the
{ c=images[i]->scan_line(x); // image
fwrite(c,images[i]->width(),1,fp);
}
}
fclose(fp); // close the file and make sure buffers empty
}
}
short mdl_total_images(char *fn)
{
char buf[800];
unsigned short xy[2],t;
FILE *fp;
fp=fopen(fn,"rb");
if (!fp)
{ set_error(imFILE_NOT_FOUND);
return 0;
}
if (fread(buf,2,1,fp)!=1)
set_error(imFILE_CORRUPTED);
else if (buf[0]!='J' || buf[1]!='C')
set_error(imINCORRECT_FILETYPE);
else if (fread(buf,5,1,fp)!=1)
set_error(imFILE_CORRUPTED);
else if (buf[4]!=0x13)
set_error(imNOT_SUPPORTED);
if (current_error()) { fclose(fp); return 0;}
fread(buf,1,768+11,fp);
t=0;
while (!feof(fp))
{ if (fread(buf,1,23,fp)==23)
{
fread(xy,2,1,fp);
xy[0]=int_to_local(xy[0]);
fseek(fp,xy[0],SEEK_CUR);
t++;
}
}
fclose(fp);
return t;
}
// read_mdl returns an array containing pointers to all the desired images
// and a palette that is read form the file
// to load image numbers 4 through 9 let start =4, end=9
image **read_mdl(char *fn, palette *&pal, short startn, short endn, short &total)
{
FILE *fp;
image **im;
char buf[50];
unsigned short xy[2],i,j;
clear_errors();
make_block(sizeof(FILE));
im=NULL;
total=0;
startn--;
CHECK(fn && (startn<=endn || endn==-1) && startn>=0);
fp=fopen(fn,"rb");
if (!fp)
{ set_error(imFILE_NOT_FOUND);
return NULL;
}
if (fread(buf,2,1,fp)!=1)
set_error(imFILE_CORRUPTED);
else if (buf[0]!='J' || buf[1]!='C')
set_error(imINCORRECT_FILETYPE);
else if (fread(buf,5,1,fp)!=1)
set_error(imFILE_CORRUPTED);
else if (buf[4]!=0x13)
set_error(imNOT_SUPPORTED);
else
{
make_block(sizeof(palette));
pal=new palette(256);
if (!pal)
{ set_error(imMEMORY_ERROR); return NULL; }
if (fread(pal->addr(),1,768,fp)!=768)
set_error(imFILE_CORRUPTED);
else if (fread(buf,1,11,fp)!=11)
set_error(imFILE_CORRUPTED);
else
{
pal->shift(2);
pal->set_all_used();
while (startn && !current_error())
{ if (fread(buf,1,23,fp)!=23)
set_error(imFILE_CORRUPTED);
fread(xy,2,1,fp);
xy[0]=int_to_local(xy[0]);
fseek(fp,xy[0],SEEK_CUR);
startn--; if (endn>0) endn--;
}
if (!current_error())
im=(image **)jmalloc(sizeof(image *)*endn,"mdl_read::image * array");
while ((startn<endn || endn==-1) && !feof(fp) && !current_error())
{
if (fread(buf,1,23,fp)==23)
{
if (fread(&j,1,2,fp)!=2) set_error(imFILE_CORRUPTED);
else
{
j=int_to_local(j);
j-=4;
xy[0]=5; xy[1]=5;
if (fread(xy,1,4,fp)!=4) set_error(imFILE_CORRUPTED);
make_block(sizeof(image));
xy[0]=int_to_local(xy[0]);
xy[1]=int_to_local(xy[1]);
im[startn]=new image(xy[0],xy[1]);
total++;
for (i=0;i<xy[1];i++)
if (fread(im[startn]->scan_line(i),xy[0],1,fp)!=1)
set_error(imFILE_CORRUPTED);
else j-=xy[0];
if (j)
fseek(fp,j,SEEK_CUR);
}
startn++;
}
}
}
}
fclose(fp);
return im;
}
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