| 0,0 → 1,76 |
|---|
| #include "fitz.h" |
| |
| fz_bitmap * |
| fz_new_bitmap(int w, int h, int n) |
| { |
| fz_bitmap *bit; |
| |
| bit = fz_malloc(sizeof(fz_bitmap)); |
| bit->refs = 1; |
| bit->w = w; |
| bit->h = h; |
| bit->n = n; |
| /* Span is 32 bit aligned. We may want to make this 64 bit if we |
| * use SSE2 etc. */ |
| bit->stride = ((n * w + 31) & ~31) >> 3; |
| |
| bit->samples = fz_calloc(h, bit->stride); |
| |
| return bit; |
| } |
| |
| fz_bitmap * |
| fz_keep_bitmap(fz_bitmap *pix) |
| { |
| pix->refs++; |
| return pix; |
| } |
| |
| void |
| fz_drop_bitmap(fz_bitmap *bit) |
| { |
| if (bit && --bit->refs == 0) |
| { |
| fz_free(bit->samples); |
| fz_free(bit); |
| } |
| } |
| |
| void |
| fz_clear_bitmap(fz_bitmap *bit) |
| { |
| memset(bit->samples, 0, bit->stride * bit->h); |
| } |
| |
| /* |
| * Write bitmap to PBM file |
| */ |
| |
| fz_error |
| fz_write_pbm(fz_bitmap *bitmap, char *filename) |
| { |
| FILE *fp; |
| unsigned char *p; |
| int h, bytestride; |
| |
| fp = fopen(filename, "wb"); |
| if (!fp) |
| return fz_throw("cannot open file '%s': %s", filename, strerror(errno)); |
| |
| assert(bitmap->n == 1); |
| |
| fprintf(fp, "P4\n%d %d\n", bitmap->w, bitmap->h); |
| |
| p = bitmap->samples; |
| |
| h = bitmap->h; |
| bytestride = (bitmap->w + 7) >> 3; |
| while (h--) |
| { |
| fwrite(p, 1, bytestride, fp); |
| p += bitmap->stride; |
| } |
| |
| fclose(fp); |
| return fz_okay; |
| } |