12b57e84e6
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98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/*
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* This file is part of the DXX-Rebirth project <https://www.dxx-rebirth.com/>.
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* It is copyright by its individual contributors, as recorded in the
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* project's Git history. See COPYING.txt at the top level for license
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* terms and a link to the Git history.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <malloc.h>
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#include "iff.h"
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#define INDEX_TO_15BPP(i) ((WORD)((((palptr[(i)].r/2)&31)<<10)+(((palptr[(i)].g/2)&31)<<5)+((palptr[(i)].b/2 )&31)))
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extern int parse_iff(FILE *ifile,struct bitmap_header *bitmap_header);
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int x,y,pl,bc;
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int bytes_per_row,color;
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int mask,first_bit_value;
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FILE *ifile;
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struct bitmap_header iff_bitmap_header;
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// Parse ilbm style data at my_bh->raw_data.
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BITMAP15 * IFF_To_15BPP(char * ifilename)
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{
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struct bitmap_header * my_bh;
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int Process_width,Process_height;
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unsigned char *p;
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struct pal_entry *palptr;
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int newptr = 0;
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int i;
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BITMAP15 * new;
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my_bh = &iff_bitmap_header;
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palptr=my_bh->palette;
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p=my_bh->raw_data;
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Process_width = 32767; // say to process full width of bitmap
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Process_height = 32767; // say to process full height of bitmap
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if ((ifile = fopen(ifilename,"rb")) == NULL) {
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printf("Unable to open bitmap file %s.\n", ifilename);
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exit(1);
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}
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parse_iff(ifile,&iff_bitmap_header);
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if (Process_width > iff_bitmap_header.w)
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Process_width = iff_bitmap_header.w;
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if (Process_height > iff_bitmap_header.h)
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Process_height = iff_bitmap_header.h;
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//printf( "%d, %d\n", Process_width, Process_height );
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new = (BITMAP15 *)malloc( sizeof(BITMAP15)+ (Process_width * Process_height * 2 ));
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if (new==NULL) exit(1);
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new->Width = Process_width;
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new->Height = Process_height;
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//printf("Process_width = %i, Process_height = %i\n",Process_width,Process_height);
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first_bit_value = 1 << (my_bh->nplanes-1);
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bytes_per_row = 2*((my_bh->w+15)/16);
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for (y=0; y<Process_height; y++) {
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bc = Process_width;
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p = &my_bh->raw_data[y*bytes_per_row*my_bh->nplanes];
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switch (my_bh->type) {
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case PBM_TYPE:
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for (x=0; x<my_bh->w; x++) {
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new->Data[newptr++] = INDEX_TO_15BPP(my_bh->raw_data[y*my_bh->w+x]);
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}
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break;
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case ILBM_TYPE:
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for (x=0; x<bytes_per_row; x++) {
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for (mask=128; mask; mask /=2) {
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color = 0;
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for (pl=0; pl<my_bh->nplanes; pl++) {
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color /= 2;
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if ( p[pl*bytes_per_row+x] & mask)
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color += first_bit_value;
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}
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new->Data[newptr++] = INDEX_TO_15BPP(color);
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bc--;
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if (!bc)
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goto line_done;
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}
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}
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line_done: ;
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break;
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}
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}
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free( my_bh->raw_data );
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return new;
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}
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<EFBFBD> |