diff options
| author | shumkovnd <shumkovnd@yandex-team.com> | 2023-11-10 14:39:34 +0300 |
|---|---|---|
| committer | shumkovnd <shumkovnd@yandex-team.com> | 2023-11-10 16:42:24 +0300 |
| commit | 77eb2d3fdcec5c978c64e025ced2764c57c00285 (patch) | |
| tree | c51edb0748ca8d4a08d7c7323312c27ba1a8b79a /contrib/python/matplotlib/py3/src/agg_workaround.h | |
| parent | dd6d20cadb65582270ac23f4b3b14ae189704b9d (diff) | |
| download | ydb-77eb2d3fdcec5c978c64e025ced2764c57c00285.tar.gz | |
KIKIMR-19287: add task_stats_drawing script
Diffstat (limited to 'contrib/python/matplotlib/py3/src/agg_workaround.h')
| -rw-r--r-- | contrib/python/matplotlib/py3/src/agg_workaround.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/contrib/python/matplotlib/py3/src/agg_workaround.h b/contrib/python/matplotlib/py3/src/agg_workaround.h new file mode 100644 index 0000000000..4762195192 --- /dev/null +++ b/contrib/python/matplotlib/py3/src/agg_workaround.h @@ -0,0 +1,85 @@ +#ifndef MPL_AGG_WORKAROUND_H +#define MPL_AGG_WORKAROUND_H + +#include "agg_pixfmt_rgba.h" + +/********************************************************************** + WORKAROUND: This class is to workaround a bug in Agg SVN where the + blending of RGBA32 pixels does not preserve enough precision +*/ + +template<class ColorT, class Order> +struct fixed_blender_rgba_pre : agg::conv_rgba_pre<ColorT, Order> +{ + typedef ColorT color_type; + typedef Order order_type; + typedef typename color_type::value_type value_type; + typedef typename color_type::calc_type calc_type; + typedef typename color_type::long_type long_type; + enum base_scale_e + { + base_shift = color_type::base_shift, + base_mask = color_type::base_mask + }; + + //-------------------------------------------------------------------- + static AGG_INLINE void blend_pix(value_type* p, + value_type cr, value_type cg, value_type cb, + value_type alpha, agg::cover_type cover) + { + blend_pix(p, + color_type::mult_cover(cr, cover), + color_type::mult_cover(cg, cover), + color_type::mult_cover(cb, cover), + color_type::mult_cover(alpha, cover)); + } + + //-------------------------------------------------------------------- + static AGG_INLINE void blend_pix(value_type* p, + value_type cr, value_type cg, value_type cb, + value_type alpha) + { + alpha = base_mask - alpha; + p[Order::R] = (value_type)(((p[Order::R] * alpha) >> base_shift) + cr); + p[Order::G] = (value_type)(((p[Order::G] * alpha) >> base_shift) + cg); + p[Order::B] = (value_type)(((p[Order::B] * alpha) >> base_shift) + cb); + p[Order::A] = (value_type)(base_mask - ((alpha * (base_mask - p[Order::A])) >> base_shift)); + } +}; + + +template<class ColorT, class Order> +struct fixed_blender_rgba_plain : agg::conv_rgba_plain<ColorT, Order> +{ + typedef ColorT color_type; + typedef Order order_type; + typedef typename color_type::value_type value_type; + typedef typename color_type::calc_type calc_type; + typedef typename color_type::long_type long_type; + enum base_scale_e { base_shift = color_type::base_shift }; + + //-------------------------------------------------------------------- + static AGG_INLINE void blend_pix(value_type* p, + value_type cr, value_type cg, value_type cb, value_type alpha, agg::cover_type cover) + { + blend_pix(p, cr, cg, cb, color_type::mult_cover(alpha, cover)); + } + + //-------------------------------------------------------------------- + static AGG_INLINE void blend_pix(value_type* p, + value_type cr, value_type cg, value_type cb, value_type alpha) + { + if(alpha == 0) return; + calc_type a = p[Order::A]; + calc_type r = p[Order::R] * a; + calc_type g = p[Order::G] * a; + calc_type b = p[Order::B] * a; + a = ((alpha + a) << base_shift) - alpha * a; + p[Order::A] = (value_type)(a >> base_shift); + p[Order::R] = (value_type)((((cr << base_shift) - r) * alpha + (r << base_shift)) / a); + p[Order::G] = (value_type)((((cg << base_shift) - g) * alpha + (g << base_shift)) / a); + p[Order::B] = (value_type)((((cb << base_shift) - b) * alpha + (b << base_shift)) / a); + } +}; + +#endif |