annotate src/image.c @ 0:a4788c959918
initial commit
| author |
John Tsiombikas <nuclear@member.fsf.org> |
| date |
Wed, 25 Oct 2017 19:34:53 +0300 (2017-10-25) |
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663471a80c21 |
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1 #include <stdlib.h>
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2 #include <string.h>
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3 #include "image.h"
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4
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5 struct ham_image *load_ham_image(const char *fname)
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6 {
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7 return 0; /* TODO */
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8 }
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9
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10 struct ham_image *gen_ham_image(int w, int h, int nbpl)
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11 {
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12 int i, x, y;
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13 struct ham_image *img;
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14 unsigned char *pptr;
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15 unsigned char pixval;
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16 /*static const uint16_t defpal[] = {
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17 0x000, 0xf00, 0xff0, 0x0f0, 0x0ff, 0x00f, 0xf0f, 0xfff,
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18 0x444, 0x800, 0x880, 0x080, 0x088, 0x008, 0x808, 0x888
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19 };*/
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20
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21 if(!(img = malloc(sizeof *img))) {
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22 return 0;
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23 }
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24 if(!(img->pixels = calloc(w * h / 8 * nbpl, 1))) {
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25 free(img);
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26 return 0;
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27 }
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28 img->width = w;
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29 img->height = h;
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30 img->chglist = 0;
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31
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32 img->nbitplanes = nbpl;
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33 /*memcpy(img->palette, defpal, sizeof defpal);*/
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34 for(i=0; i<16; i++) {
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35 img->palette[i] = i | (i << 4) | (i << 8);
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36 }
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37
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38 pptr = img->pixels;
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39 for(i=0; i<4; i++) {
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40 pptr = img->pixels + i * w / 8;
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41 for(y=0; y<h; y++) {
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42 pixval = 0;
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43 for(x=0; x<w; x++) {
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44 pixval = (pixval >> 1) | ((((x ^ y) >> i) & 1) ? 0x80 : 0);
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45 if((x & 7) == 7) {
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46 *pptr++ = pixval;
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47 pixval = 0;
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48 }
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49 }
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50 pptr += w / 8 * (img->nbitplanes - 1);
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51 }
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52 }
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53
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54 return img;
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55 }
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