diff options
Diffstat (limited to 'render/scale.c')
| -rw-r--r-- | render/scale.c | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/render/scale.c b/render/scale.c deleted file mode 100644 index 01ebec2d..00000000 --- a/render/scale.c +++ /dev/null @@ -1,225 +0,0 @@ -#include <fitz.h> - -/* TODO: these should go in fz_rastfuncs */ - -typedef void (*rowfunc)(unsigned char *src, unsigned char *dst, int w, int ncomp, int denom); -typedef void (*colfunc)(unsigned char *src, unsigned char *dst, int w, int ncomp, int denom); - -static void -scalerow(unsigned char *src, unsigned char *dst, int w, int ncomp, int denom) -{ - int x, left, k; - int sum[FZ_MAXCOLORS]; - - left = 0; - for (k = 0; k < ncomp; k++) - sum[k] = 0; - - for (x = 0; x < w; x++) - { - for (k = 0; k < ncomp; k++) - sum[k] += src[x * ncomp + k]; - if (++left == denom) - { - left = 0; - for (k = 0; k < ncomp; k++) - { - dst[k] = sum[k] / denom; - sum[k] = 0; - } - dst += ncomp; - } - } - - /* left overs */ - if (left) - for (k = 0; k < ncomp; k++) - dst[k] = sum[k] / left; -} - -static void -scalerow1(unsigned char *src, unsigned char *dst, int w, int ncomp, int denom) -{ - int x, left; - int sum; - - left = 0; - sum = 0; - - for (x = 0; x < w; x++) - { - sum += *src++; - if (++left == denom) - { - left = 0; - *dst++ = sum / denom; - sum = 0; - } - } - - /* left overs */ - if (left) - { - *dst++ = sum / left; - } -} - -static void -scalerow2(unsigned char *src, unsigned char *dst, int w, int ncomp, int denom) -{ - int x, left; - int sum0, sum1; - - left = 0; - sum0 = 0; - sum1 = 0; - - for (x = 0; x < w; x++) - { - sum0 += *src++; - sum1 += *src++; - if (++left == denom) - { - left = 0; - *dst++ = sum0 / denom; - *dst++ = sum1 / denom; - sum0 = 0; - sum1 = 0; - } - } - - /* left overs */ - if (left) - { - *dst++ = sum0 / left; - *dst++ = sum1 / left; - } -} - - -static void -scalecols(unsigned char *src, unsigned char *dst, int w, int ncomp, int denom) -{ - int x, y, k; - unsigned char *s; - int sum[FZ_MAXCOLORS]; - - for (x = 0; x < w; x++) - { - s = src + (x * ncomp); - for (k = 0; k < ncomp; k++) - sum[k] = 0; - for (y = 0; y < denom; y++) - for (k = 0; k < ncomp; k++) - sum[k] += s[y * w * ncomp + k]; - for (k = 0; k < ncomp; k++) - dst[k] = sum[k] / denom; - dst += ncomp; - } -} - -static void -scalecols1(unsigned char *src, unsigned char *dst, int w, int ncomp, int denom) -{ - int x, y; - unsigned char *s; - int sum; - - for (x = 0; x < w; x++) - { - s = src + x; - sum = 0; - for (y = 0; y < denom; y++) - sum += s[y * w]; - *dst++ = sum / denom; - } -} - -static void -scalecols2(unsigned char *src, unsigned char *dst, int w, int ncomp, int denom) -{ - int x, y; - unsigned char *s; - int sum0, sum1; - - for (x = 0; x < w; x++) - { - s = src + (x * 2); - sum0 = 0; - sum1 = 0; - for (y = 0; y < denom; y++) - { - sum0 += s[y * w * 2 + 0]; - sum1 += s[y * w * 2 + 1]; - } - *dst++ = sum0 / denom; - *dst++ = sum1 / denom; - } -} - -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; - rowfunc rowfunc; - colfunc colfunc; - - 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: - rowfunc = scalerow1; - colfunc = scalecols1; - break; - case 2: - rowfunc = scalerow2; - colfunc = scalecols2; - break; - default: - rowfunc = scalerow; - colfunc = scalecols; - break; - } - - for (y = 0, oy = 0; y < (src->h / ydenom) * ydenom; y += ydenom, oy++) - { - for (iy = 0; iy < ydenom; iy++) - rowfunc(src->samples + (y + iy) * src->w * n, - buf + iy * ow * n, - src->w, n, xdenom); - colfunc(buf, dst->samples + oy * dst->w * n, dst->w, n, ydenom); - } - - ydenom = src->h - y; - if (ydenom) - { - for (iy = 0; iy < ydenom; iy++) - rowfunc(src->samples + (y + iy) * src->w * n, - buf + iy * ow * n, - src->w, n, xdenom); - colfunc(buf, dst->samples + oy * dst->w * n, dst->w, n, ydenom); - } - - fz_free(buf); - *dstp = dst; - return nil; -} - |