Commit 1c9f9b5
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When using nearest neighbor interpolation and not actually scaling, just copy the data. (Note we don't do this for other kinds of interpolation, because the filtering on those interpolations could have an effect even when not actually scaling.)
1 parent bd94c0d commit 1c9f9b5
1 file changed
Lines changed: 9 additions & 5 deletions
| Original file line number | Diff line number | Diff line change | |
|---|---|---|---|
@@ -439,11 +439,15 @@ Image::resize(const Py::Tuple& args, const Py::Dict& kwargs) | |||
| 439 | 439 | ||
| 440 | 440 | case NEAREST: | |
| 441 | 441 | { | |
| 442 | - typedef agg::span_image_filter_rgba_nn<img_accessor_type, interpolator_type> span_gen_type; | ||
| 443 | - typedef agg::renderer_scanline_aa<renderer_base, span_alloc_type, span_gen_type> renderer_type; | ||
| 444 | - span_gen_type sg(ia, interpolator); | ||
| 445 | - renderer_type ri(rb, sa, sg); | ||
| 446 | - agg::render_scanlines(ras, sl, ri); | ||
| 442 | + if (colsIn == numcols && rowsIn == numrows) { | ||
| 443 | + memcpy(bufferOut, bufferIn, colsIn * rowsIn * 4); | ||
| 444 | + } else { | ||
| 445 | + typedef agg::span_image_filter_rgba_nn<img_accessor_type, interpolator_type> span_gen_type; | ||
| 446 | + typedef agg::renderer_scanline_aa<renderer_base, span_alloc_type, span_gen_type> renderer_type; | ||
| 447 | + span_gen_type sg(ia, interpolator); | ||
| 448 | + renderer_type ri(rb, sa, sg); | ||
| 449 | + agg::render_scanlines(ras, sl, ri); | ||
| 450 | + } | ||
| 447 | 451 | } | |
| 448 | 452 | break; | |
| 449 | 453 | ||
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