diff options
Diffstat (limited to 'source/fitz/draw-affine.c')
| -rw-r--r-- | source/fitz/draw-affine.c | 20 |
1 files changed, 7 insertions, 13 deletions
diff --git a/source/fitz/draw-affine.c b/source/fitz/draw-affine.c index c05c70a7..110c0085 100644 --- a/source/fitz/draw-affine.c +++ b/source/fitz/draw-affine.c @@ -1062,19 +1062,13 @@ fz_paint_image_imp(fz_pixmap *dst, const fz_irect *scissor, fz_pixmap *shape, fz u = (int)((local_ctm.a * x) + (local_ctm.c * y) + local_ctm.e + ((local_ctm.a + local_ctm.c) * .5f)); v = (int)((local_ctm.b * x) + (local_ctm.d * y) + local_ctm.f + ((local_ctm.b + local_ctm.d) * .5f)); - /* RJW: The following is voodoo. No idea why it works, but it gives - * the best match between scaled/unscaled/interpolated/non-interpolated - * that we have found. */ - if (dolerp) { - u -= 32768; - v -= 32768; - if (is_rectilinear) - { - if (u < 0) - u = 0; - if (v < 0) - v = 0; - } + /* If we are not linearly interpolating, then we use 'nearest'. We round u and v downwards + * each time, which isn't really "nearest". Bias them by a rounding constant now to adjust + * for this. */ + if (!dolerp) + { + u += 32768; + v += 32768; } dp = dst->samples + (unsigned int)(((y - dst->y) * dst->w + (x - dst->x)) * dst->n); |