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| author | Siarhei Siamashka <siarhei.siamashka@gmail.com> | 2012-06-26 01:06:10 +0300 |
|---|---|---|
| committer | Siarhei Siamashka <siarhei.siamashka@gmail.com> | 2012-07-01 21:45:43 +0300 |
| commit | ccd31896bc2f1f323b3be9e8b1447cab892ee62d (patch) | |
| tree | 2857dd43c40fc1157b376cdd9104205667f23d88 /pixman/pixman-bits-image.c | |
| parent | ad9f1d020188fe90ae742041195baebdfbe6fe27 (diff) | |
| download | pixman-ccd31896bc2f1f323b3be9e8b1447cab892ee62d.tar.gz | |
Bilinear interpolation precision is now configurable at compile time
Macro BILINEAR_INTERPOLATION_BITS in pixman-private.h selects
the number of fractional bits used for bilinear interpolation.
scaling-test and affine-test have checksums for 4-bit, 7-bit
and 8-bit configurations.
Diffstat (limited to 'pixman/pixman-bits-image.c')
| -rw-r--r-- | pixman/pixman-bits-image.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/pixman/pixman-bits-image.c b/pixman/pixman-bits-image.c index 05eab96..b6c8630 100644 --- a/pixman/pixman-bits-image.c +++ b/pixman/pixman-bits-image.c @@ -131,8 +131,8 @@ bits_image_fetch_pixel_bilinear (bits_image_t *image, x1 = x - pixman_fixed_1 / 2; y1 = y - pixman_fixed_1 / 2; - distx = (x1 >> 8) & 0xff; - disty = (y1 >> 8) & 0xff; + distx = pixman_fixed_to_bilinear_weight (x1); + disty = pixman_fixed_to_bilinear_weight (y1); x1 = pixman_fixed_to_int (x1); y1 = pixman_fixed_to_int (y1); @@ -200,7 +200,7 @@ bits_image_fetch_bilinear_no_repeat_8888 (pixman_iter_t *iter, x = x_top = x_bottom = v.vector[0] - pixman_fixed_1/2; y = v.vector[1] - pixman_fixed_1/2; - disty = (y >> 8) & 0xff; + disty = pixman_fixed_to_bilinear_weight (y); /* Load the pointers to the first and second lines from the source * image that bilinear code must read. @@ -309,7 +309,7 @@ bits_image_fetch_bilinear_no_repeat_8888 (pixman_iter_t *iter, tr = top_row[pixman_fixed_to_int (x_top) + 1] | top_mask; br = bottom_row[pixman_fixed_to_int (x_bottom) + 1] | bottom_mask; - distx = (x >> 8) & 0xff; + distx = pixman_fixed_to_bilinear_weight (x); *buffer++ = bilinear_interpolation (0, tr, 0, br, distx, disty); @@ -334,7 +334,7 @@ bits_image_fetch_bilinear_no_repeat_8888 (pixman_iter_t *iter, bl = bottom_row [pixman_fixed_to_int (x_bottom)] | bottom_mask; br = bottom_row [pixman_fixed_to_int (x_bottom) + 1] | bottom_mask; - distx = (x >> 8) & 0xff; + distx = pixman_fixed_to_bilinear_weight (x); *buffer = bilinear_interpolation (tl, tr, bl, br, distx, disty); } @@ -358,7 +358,7 @@ bits_image_fetch_bilinear_no_repeat_8888 (pixman_iter_t *iter, tl = top_row [pixman_fixed_to_int (x_top)] | top_mask; bl = bottom_row [pixman_fixed_to_int (x_bottom)] | bottom_mask; - distx = (x >> 8) & 0xff; + distx = pixman_fixed_to_bilinear_weight (x); *buffer = bilinear_interpolation (tl, 0, bl, 0, distx, disty); } @@ -695,8 +695,8 @@ bits_image_fetch_bilinear_affine (pixman_image_t * image, x1 = x - pixman_fixed_1 / 2; y1 = y - pixman_fixed_1 / 2; - distx = (x1 >> 8) & 0xff; - disty = (y1 >> 8) & 0xff; + distx = pixman_fixed_to_bilinear_weight (x1); + disty = pixman_fixed_to_bilinear_weight (y1); y1 = pixman_fixed_to_int (y1); y2 = y1 + 1; |