Changeset 31446 for trunk/psLib/src/imageops/psImageMaskOps.c

Timestamp:

May 5, 2011, 10:37:54 AM (15 years ago)

Author:

eugene

Message:

compile-time option for separable (but unthreaded) bilinear interpolation (which is faster?); correct psImageMaskCircle for 0.5 pixel offset

File:

• trunk/psLib/src/imageops/psImageMaskOps.c (modified) (2 diffs)

trunk/psLib/src/imageops/psImageMaskOps.c

@@ -146 +146 @@
     for (int iy = 0; iy < image->numRows; iy++) { \
         for (int ix = 0; ix < image->numCols; ix++) { \
-            dx = ix + image->col0 - x; \
-            dy = iy + image->row0 - y; \
+            dx = ix + 0.5 + image->col0 - x; \
+            dy = iy + 0.5 + image->row0 - y; \
             r2 = PS_SQR(dx) + PS_SQR(dy); \
             if (r2 <= R2) { \
@@ -197 +197 @@
     for (int iy = 0; iy < image->numRows; iy++) { \
         for (int ix = 0; ix < image->numCols; ix++) { \
-            dx = ix + image->col0 - x; \
-            dy = iy + image->row0 - y; \
+            dx = ix + 0.5 + image->col0 - x; \
+            dy = iy + 0.5 + image->row0 - y; \
             r2 = PS_SQR(dx) + PS_SQR(dy); \
             if (r2 > R2) { \