mirror of
https://github.com/isometimes/rpi4-osdev
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90 lines
2.3 KiB
C
90 lines
2.3 KiB
C
#include "../include/wgt.h"
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#include "../include/mem.h"
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short wloadsprites (color *pal, unsigned char *file, block *image_array, short start,
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short end)
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{
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short maxsprite; /* maximum # of sprites in the file */
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short startingsprite; /* First sprite in the file. Version <=3 = 1
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Version 4 = 0 */
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unsigned int a, b, i, spritemade;
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char buf[14];
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int size;
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a = (unsigned int)*file;
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file += 2;
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/* Get the version number, and change the startingsprite accordingly.
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If version <= 3, maxsprite contains the maximum number of sprites
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that can be stored in a file. If version > 4, maxsprite contains
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the number of the highest sprite in the file. (empty sprites at
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the end are not kept in the file. */
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if (a <= 3)
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startingsprite = 1;
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else
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startingsprite = 0;
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memcpy_char(&buf, file, 13);
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file += 13;
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if (0 == memcmp (" Sprite File ", &buf[0], 13))
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/* see if it is a sprite file */
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{
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for (int k=0;k<256;k++) {
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pal[k].r = 4 * *file++;
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pal[k].g = 4 * *file++;
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pal[k].b = 4 * *file++;
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}
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wsetpalette (0, 255, pal);
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maxsprite = (short)*file; /* maximum sprites in this file */
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file += 2;
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for (i = start; i <= end; i++) /* make all sprites null
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(still need to call wfreesprites) */
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image_array[i] = NULL;
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for (i = startingsprite; i <= maxsprite; i++) /* load them in */
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{
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spritemade = (unsigned int)*file; /* flag to see if sprite exists */
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file += 2;
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if (spritemade == 1)
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{
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a = (unsigned int)*file; /* get width and height */
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file += 2;
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b = (unsigned int)*file;
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file += 2;
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if ((i >= start) && (i <= end)) /* Load this one */
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{
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size = a * b;
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image_array[i] = (block)malloc ((size * 4) + 12);
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block arr = image_array[i];
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*arr++ = a;
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*arr++ = b;
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for (int k=0;k<size;k++) *arr++ = vgapal[*file++];
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}
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else /* Don't load this one */
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file += size;
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}
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}
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}
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return (0);
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}
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void wfreesprites (block *image_array, short start, short end)
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{
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short i;
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for (i = start; i <= end; i++)
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{
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if (image_array[i] != NULL)
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{
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free (image_array[i]);
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image_array[i] = NULL;
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}
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}
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}
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