int dpmi_allocate_selector( void * address, int size, ushort * selector )
{
union REGS regs;
memset(®s,0,sizeof(regs));
regs.w.ax = 0; // DPMI Allocate Selector
regs.w.cx = 1; // Allocate 1 selector
int386 (0x31, ®s, ®s); // call dpmi
if (regs.w.cflag)
return 0; // Return 0 if error
*selector = regs.w.ax;
if ( !dpmi_modify_selector_base( *selector, address ) )
return 0;
if ( !dpmi_modify_selector_limit( *selector, size ) )
return 0;
// mprintf( 0, "Selector 0x%4x has base of 0x%8x, size %d bytes\n", *selector, linear,segment_limit);
return 1;
}
void piggy_bitmap_page_in( bitmap_index bitmap )
{
grs_bitmap * bmp;
int i,org_i;
org_i = 0;
i = bitmap.index;
Assert( i >= 0 );
Assert( i < MAX_BITMAP_FILES );
Assert( i < Num_bitmap_files );
Assert( Piggy_bitmap_cache_size > 0 );
if ( i < 1 ) return;
if ( i >= MAX_BITMAP_FILES ) return;
if ( i >= Num_bitmap_files ) return;
if ( GameBitmapOffset[i] == 0 ) return; // A read-from-disk bitmap!!!
if ( GameArg.SysLowMem ) {
org_i = i;
i = GameBitmapXlat[i]; // Xlat for low-memory settings!
}
bmp = &GameBitmaps[i];
if ( bmp->bm_flags & BM_FLAG_PAGED_OUT ) {
stop_time();
ReDoIt:
descent_critical_error = 0;
PHYSFSX_fseek( Piggy_fp, GameBitmapOffset[i], SEEK_SET );
if ( descent_critical_error ) {
piggy_critical_error();
goto ReDoIt;
}
gr_set_bitmap_flags (bmp, GameBitmapFlags[i]);
gr_set_bitmap_data (bmp, &Piggy_bitmap_cache_data [Piggy_bitmap_cache_next]);
if ( bmp->bm_flags & BM_FLAG_RLE ) {
int zsize = 0;
descent_critical_error = 0;
zsize = PHYSFSX_readInt(Piggy_fp);
if ( descent_critical_error ) {
piggy_critical_error();
goto ReDoIt;
}
// GET JOHN NOW IF YOU GET THIS ASSERT!!!
Assert( Piggy_bitmap_cache_next+zsize < Piggy_bitmap_cache_size );
if ( Piggy_bitmap_cache_next+zsize >= Piggy_bitmap_cache_size ) {
piggy_bitmap_page_out_all();
goto ReDoIt;
}
memcpy( &Piggy_bitmap_cache_data[Piggy_bitmap_cache_next], &zsize, sizeof(int) );
Piggy_bitmap_cache_next += sizeof(int);
descent_critical_error = 0;
PHYSFS_read( Piggy_fp, &Piggy_bitmap_cache_data[Piggy_bitmap_cache_next], 1, zsize-4 );
if ( descent_critical_error ) {
piggy_critical_error();
goto ReDoIt;
}
if (MacPig)
{
rle_swap_0_255(bmp);
memcpy(&zsize, bmp->bm_data, 4);
}
Piggy_bitmap_cache_next += zsize-4;
} else {
// GET JOHN NOW IF YOU GET THIS ASSERT!!!
Assert( Piggy_bitmap_cache_next+(bmp->bm_h*bmp->bm_w) < Piggy_bitmap_cache_size );
if ( Piggy_bitmap_cache_next+(bmp->bm_h*bmp->bm_w) >= Piggy_bitmap_cache_size ) {
piggy_bitmap_page_out_all();
goto ReDoIt;
}
descent_critical_error = 0;
PHYSFS_read( Piggy_fp, &Piggy_bitmap_cache_data[Piggy_bitmap_cache_next], 1, bmp->bm_h*bmp->bm_w );
if ( descent_critical_error ) {
piggy_critical_error();
goto ReDoIt;
}
if (MacPig)
swap_0_255(bmp);
Piggy_bitmap_cache_next+=bmp->bm_h*bmp->bm_w;
}
#ifdef BITMAP_SELECTOR
if ( bmp->bm_selector ) {
if (!dpmi_modify_selector_base( bmp->bm_selector, bmp->bm_data ))
Error( "Error modifying selector base in piggy.c\n" );
}
#endif
compute_average_rgb(bmp, bmp->avg_color_rgb);
start_time();
}
if ( GameArg.SysLowMem ) {
if ( org_i != i )
GameBitmaps[org_i] = GameBitmaps[i];
}
}
void piggy_bitmap_page_in( bitmap_index bitmap )
{
grs_bitmap * bmp;
int i,org_i,temp;
i = bitmap.index;
Assert( i >= 0 );
Assert( i < MAX_BITMAP_FILES );
Assert( i < Num_bitmap_files );
Assert( Piggy_bitmap_cache_size > 0 );
if ( i < 1 ) return;
if ( i >= MAX_BITMAP_FILES ) return;
if ( i >= Num_bitmap_files ) return;
if ( GameBitmapOffset[i] == 0 ) return; // A read-from-disk bitmap!!!
if ( piggy_low_memory ) {
org_i = i;
i = GameBitmapXlat[i]; // Xlat for low-memory settings!
}
bmp = &GameBitmaps[i];
if ( bmp->bm_flags & BM_FLAG_PAGED_OUT ) {
stop_time();
ReDoIt:
descent_critical_error = 0;
cfseek(Piggy_fp, GameBitmapOffset[i], SEEK_SET);
if ( descent_critical_error ) {
piggy_critical_error();
goto ReDoIt;
}
bmp->bm_data = &Piggy_bitmap_cache_data[Piggy_bitmap_cache_next];
bmp->bm_flags = GameBitmapFlags[i];
if ( bmp->bm_flags & BM_FLAG_RLE ) {
int zsize = 0;
descent_critical_error = 0;
// This fails consistently the first time it's called...
// Would be nice to not have to redo every time
temp = cfread( &zsize, 1, sizeof(int), Piggy_fp );
if (temp == EOF)
goto ReDoIt;
if ( descent_critical_error ) {
piggy_critical_error();
goto ReDoIt;
}
// GET JOHN NOW IF YOU GET THIS ASSERT!!!
Assert( Piggy_bitmap_cache_next+zsize < Piggy_bitmap_cache_size );
if ( Piggy_bitmap_cache_next+zsize >= Piggy_bitmap_cache_size ) {
piggy_bitmap_page_out_all();
goto ReDoIt;
}
memcpy( &Piggy_bitmap_cache_data[Piggy_bitmap_cache_next], &zsize, sizeof(int) );
Piggy_bitmap_cache_next += sizeof(int);
descent_critical_error = 0;
temp = cfread( &Piggy_bitmap_cache_data[Piggy_bitmap_cache_next], 1, zsize-4, Piggy_fp );
if ( descent_critical_error ) {
piggy_critical_error();
goto ReDoIt;
}
Piggy_bitmap_cache_next += zsize-4;
} else {
// GET JOHN NOW IF YOU GET THIS ASSERT!!!
Assert( Piggy_bitmap_cache_next+(bmp->bm_h*bmp->bm_w) < Piggy_bitmap_cache_size );
if ( Piggy_bitmap_cache_next+(bmp->bm_h*bmp->bm_w) >= Piggy_bitmap_cache_size ) {
piggy_bitmap_page_out_all();
goto ReDoIt;
}
descent_critical_error = 0;
temp = cfread( &Piggy_bitmap_cache_data[Piggy_bitmap_cache_next], 1, bmp->bm_h*bmp->bm_w, Piggy_fp );
if ( descent_critical_error ) {
piggy_critical_error();
goto ReDoIt;
}
Piggy_bitmap_cache_next+=bmp->bm_h*bmp->bm_w;
}
if ( bmp->bm_selector ) {
if (!dpmi_modify_selector_base( bmp->bm_selector, bmp->bm_data ))
Error( "Error modifying selector base in piggy.c\n" );
}
start_time();
}
if ( piggy_low_memory ) {
if ( org_i != i )
GameBitmaps[org_i] = GameBitmaps[i];
}
}
