fabs/rotate-me-fast
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Remove pixel_size in rotate_pixel().

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It is now specialized for PGM format.
This commit is contained in:
Fabien Freling 2014-08-11 07:51:17 +02:00
parent ea7855b9dd
commit 2491796107
1 changed files with 5 additions and 7 deletions
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12
rotation.cpp
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@ -340,15 +340,13 @@ void rotate_pixel(Image const& src,
int const src_y = src_rotated_point.y >> q_pow;
// Bilinear interpolation
unsigned int const src_index_1 = (src_y * src.width + src_x) * src.pixel_size;
unsigned int const src_index_2 = src_index_1 + src.pixel_size;
unsigned int const src_index_3 = src_index_1 + src.pixel_size * src.width;
unsigned int const src_index_4 = src_index_3 + src.pixel_size;
unsigned int const src_index_1 = src_y * src.width + src_x;
unsigned int const src_index_3 = src_index_1 + src.width;
pvalue_t const src_tl = src.buffer[src_index_1];
pvalue_t const src_tr = src.buffer[src_index_2];
pvalue_t const src_tr = src.buffer[src_index_1 + 1];
pvalue_t const src_bl = src.buffer[src_index_3];
pvalue_t const src_br = src.buffer[src_index_4];
pvalue_t const src_br = src.buffer[src_index_3 + 1];
unsigned int const x_delta = (src_rotated_point.x >> (q_pow - q_inter_pow)) & mask;
unsigned int const y_delta = (src_rotated_point.y >> (q_pow - q_inter_pow)) & mask;
@ -402,7 +400,7 @@ Image* rotate(Image const& src, double angle)
round_if_very_small(src_delta_y.x);
round_if_very_small(src_delta_y.y);
// Quantized position on a grid
// Quantized position on a 1024x1024 grid
int const q_pos_pow = 10;
int const q_pos = 1 << q_pos_pow;