diff options
author | Campbell Barton <ideasman42@gmail.com> | 2014-04-16 17:25:10 +0400 |
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committer | Campbell Barton <ideasman42@gmail.com> | 2014-04-16 17:25:10 +0400 |
commit | d1b1d194dc9cc741d87dc63e701402de0776c694 (patch) | |
tree | 344bde4783c61c65412fa1fd2435e705ead26965 /source/blender/blenkernel/intern/mask_rasterize.c | |
parent | b3972aeea05bc6c60d7b7da4e6b59a64b822448a (diff) |
Fix for half pixel offset rasterizing masks
Diffstat (limited to 'source/blender/blenkernel/intern/mask_rasterize.c')
-rw-r--r-- | source/blender/blenkernel/intern/mask_rasterize.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/source/blender/blenkernel/intern/mask_rasterize.c b/source/blender/blenkernel/intern/mask_rasterize.c index 92628387dc6..ea039dabce4 100644 --- a/source/blender/blenkernel/intern/mask_rasterize.c +++ b/source/blender/blenkernel/intern/mask_rasterize.c @@ -1434,6 +1434,10 @@ void BKE_maskrasterize_buffer(MaskRasterHandle *mr_handle, const unsigned int width, const unsigned int height, float *buffer) { + const float x_inv = 1.0f / (float)width; + const float y_inv = 1.0f / (float)height; + const float x_px_ofs = x_inv * 0.5f; + const float y_px_ofs = y_inv * 0.5f; #ifdef _MSC_VER int y; /* msvc requires signed for some reason */ @@ -1449,9 +1453,9 @@ void BKE_maskrasterize_buffer(MaskRasterHandle *mr_handle, unsigned int i = y * width; unsigned int x; float xy[2]; - xy[1] = (float)y / (float)height; + xy[1] = ((float)y * y_inv) + y_px_ofs; for (x = 0; x < width; x++, i++) { - xy[0] = (float)x / (float)width; + xy[0] = ((float)x * x_inv) + x_px_ofs; buffer[i] = BKE_maskrasterize_handle_sample(mr_handle, xy); } |