diff options
Diffstat (limited to 'render/imagescale.c')
| -rw-r--r-- | render/imagescale.c | 191 |
1 files changed, 0 insertions, 191 deletions
diff --git a/render/imagescale.c b/render/imagescale.c deleted file mode 100644 index ede19f1c..00000000 --- a/render/imagescale.c +++ /dev/null @@ -1,191 +0,0 @@ -#include <fitz.h> - -typedef unsigned char byte; - -static void srown(byte *src, byte *dst, int w, int denom, int n) -{ - int x, left, k; - int sum[FZ_MAXCOLORS]; - - left = 0; - for (k = 0; k < n; k++) - sum[k] = 0; - - for (x = 0; x < w; x++) - { - for (k = 0; k < n; k++) - sum[k] += src[x * n + k]; - if (++left == denom) - { - left = 0; - for (k = 0; k < n; k++) - { - dst[k] = sum[k] / denom; - sum[k] = 0; - } - dst += n; - } - } - - /* left overs */ - if (left) - for (k = 0; k < n; k++) - dst[k] = sum[k] / left; -} - -static void srow1(byte *src, byte *dst, int w, int denom) -{ - srown(src, dst, w, denom, 1); -} - -static void srow2(byte *src, byte *dst, int w, int denom) -{ - srown(src, dst, w, denom, 2); -} - -static void srow4(byte *src, byte *dst, int w, int denom) -{ - srown(src, dst, w, denom, 4); -} - -static void srow5(byte *src, byte *dst, int w, int denom) -{ - srown(src, dst, w, denom, 5); -} - -static void scoln(byte *src, byte *dst, int w, int denom, int n) -{ - int x, y, k; - byte *s; - int sum[FZ_MAXCOLORS]; - - for (x = 0; x < w; x++) - { - s = src + (x * n); - for (k = 0; k < n; k++) - sum[k] = 0; - for (y = 0; y < denom; y++) - for (k = 0; k < n; k++) - sum[k] += s[y * w * n + k]; - for (k = 0; k < n; k++) - dst[k] = sum[k] / denom; - dst += n; - } -} - -static void scol1(byte *src, byte *dst, int w, int denom) -{ - scoln(src, dst, w, denom, 1); -} - -static void scol2(byte *src, byte *dst, int w, int denom) -{ - scoln(src, dst, w, denom, 2); -} - -static void scol4(byte *src, byte *dst, int w, int denom) -{ - scoln(src, dst, w, denom, 4); -} - -static void scol5(byte *src, byte *dst, int w, int denom) -{ - scoln(src, dst, w, denom, 5); -} - -void (*fz_srown)(byte *src, byte *dst, int w, int denom, int n) = srown; -void (*fz_srow1)(byte *src, byte *dst, int w, int denom) = srow1; -void (*fz_srow2)(byte *src, byte *dst, int w, int denom) = srow2; -void (*fz_srow4)(byte *src, byte *dst, int w, int denom) = srow4; -void (*fz_srow5)(byte *src, byte *dst, int w, int denom) = srow5; - -void (*fz_scoln)(byte *src, byte *dst, int w, int denom, int n) = scoln; -void (*fz_scol1)(byte *src, byte *dst, int w, int denom) = scol1; -void (*fz_scol2)(byte *src, byte *dst, int w, int denom) = scol2; -void (*fz_scol4)(byte *src, byte *dst, int w, int denom) = scol4; -void (*fz_scol5)(byte *src, byte *dst, int w, int denom) = scol5; - -fz_error * -fz_scalepixmap(fz_pixmap **dstp, fz_pixmap *src, int xdenom, int ydenom) -{ - fz_error *error; - fz_pixmap *dst; - unsigned char *buf; - int y, iy, oy; - int ow, oh, n; - - void (*srowx)(byte *src, byte *dst, int w, int denom) = nil; - void (*scolx)(byte *src, byte *dst, int w, int denom) = nil; - - ow = (src->w + xdenom - 1) / xdenom; - oh = (src->h + ydenom - 1) / ydenom; - n = src->n; - - buf = fz_malloc(ow * n * ydenom); - if (!buf) - return fz_outofmem; - - error = fz_newpixmap(&dst, 0, 0, ow, oh, src->n); - if (error) - { - fz_free(buf); - return error; - } - - switch (n) - { - case 1: srowx = fz_srow1; scolx = fz_scol1; break; - case 2: srowx = fz_srow2; scolx = fz_scol2; break; - case 4: srowx = fz_srow4; scolx = fz_scol4; break; - case 5: srowx = fz_srow5; scolx = fz_scol5; break; - } - - if (srowx && scolx) - { - for (y = 0, oy = 0; y < (src->h / ydenom) * ydenom; y += ydenom, oy++) - { - for (iy = 0; iy < ydenom; iy++) - srowx(src->samples + (y + iy) * src->w * n, - buf + iy * ow * n, - src->w, xdenom); - scolx(buf, dst->samples + oy * dst->w * n, dst->w, ydenom); - } - - ydenom = src->h - y; - if (ydenom) - { - for (iy = 0; iy < ydenom; iy++) - srowx(src->samples + (y + iy) * src->w * n, - buf + iy * ow * n, - src->w, xdenom); - scolx(buf, dst->samples + oy * dst->w * n, dst->w, ydenom); - } - } - - else - { - for (y = 0, oy = 0; y < (src->h / ydenom) * ydenom; y += ydenom, oy++) - { - for (iy = 0; iy < ydenom; iy++) - fz_srown(src->samples + (y + iy) * src->w * n, - buf + iy * ow * n, - src->w, xdenom, n); - fz_scoln(buf, dst->samples + oy * dst->w * n, dst->w, ydenom, n); - } - - ydenom = src->h - y; - if (ydenom) - { - for (iy = 0; iy < ydenom; iy++) - fz_srown(src->samples + (y + iy) * src->w * n, - buf + iy * ow * n, - src->w, xdenom, n); - fz_scoln(buf, dst->samples + oy * dst->w * n, dst->w, ydenom, n); - } - } - - fz_free(buf); - *dstp = dst; - return nil; -} - |