libs/agg/agg_pixfmt_rgb.h

88                                          unsigned alpha,
91             p[Order::R] += (value_type)(((cr - p[Order::R]) * alpha) >> base_shift);
92             p[Order::G] += (value_type)(((cg - p[Order::G]) * alpha) >> base_shift);
93             p[Order::B] += (value_type)(((cb - p[Order::B]) * alpha) >> base_shift);
110                                          unsigned alpha,
113             alpha = color_type::base_mask - alpha;
115             p[Order::R] = (value_type)((p[Order::R] * alpha + cr * cover) >> base_shift);
116             p[Order::G] = (value_type)((p[Order::G] * alpha + cg * cover) >> base_shift);
117             p[Order::B] = (value_type)((p[Order::B] * alpha + cb * cover) >> base_shift);
123                                          unsigned alpha)
125             alpha = color_type::base_mask - alpha;
126             p[Order::R] = (value_type)(((p[Order::R] * alpha) >> base_shift) + cr);
127             p[Order::G] = (value_type)(((p[Order::G] * alpha) >> base_shift) + cg);
128             p[Order::B] = (value_type)(((p[Order::B] * alpha) >> base_shift) + cb);
153                                   unsigned alpha,
159             p[Order::R] = m_gamma->inv((((m_gamma->dir(cr) - r) * alpha) >> base_shift) + r);
160             p[Order::G] = m_gamma->inv((((m_gamma->dir(cg) - g) * alpha) >> base_shift) + g);
161             p[Order::B] = m_gamma->inv((((m_gamma->dir(cb) - b) * alpha) >> base_shift) + b);
198                 calc_type alpha = (calc_type(c.a) * (cover + 1)) >> 8;
199                 if(alpha == base_mask)
207                     m_blender.blend_pix(p, c.r, c.g, c.b, alpha, cover);
358                 calc_type alpha = (calc_type(c.a) * (calc_type(cover) + 1)) >> 8;
359                 if(alpha == base_mask)
374                         m_blender.blend_pix(p, c.r, c.g, c.b, alpha, cover);
392                 calc_type alpha = (calc_type(c.a) * (cover + 1)) >> 8;
393                 if(alpha == base_mask)
413                         m_blender.blend_pix(p, c.r, c.g, c.b, alpha, cover);
434                     calc_type alpha = (calc_type(c.a) * (calc_type(*covers) + 1)) >> 8;
435                     if(alpha == base_mask)
443                         m_blender.blend_pix(p, c.r, c.g, c.b, alpha, *covers);
466                     calc_type alpha = (calc_type(c.a) * (calc_type(*covers) + 1)) >> 8;
467                     if(alpha == base_mask)
475                         m_blender.blend_pix(p, c.r, c.g, c.b, alpha, *covers);
684                         value_type alpha = psrc[src_order::A];
685                         if(alpha)
687                             if(alpha == base_mask)
699                                                     alpha);