41 def color_pre_multiply(r, g, b, a, background):  argument
46     return ((r * a + (255 - a) * br) >> 8, (g * a + (255 - a) * bg) >> 8,
267             for r, g, b in zip(R, G, B):
268                 ret += [r, g, b]
298         for r, g, b, a in zip(R, G, B, A):
299             ret += [r, g, b, a]
588             def multiply(r, g, b, a):  argument
589                 r, g, b = (r * a) >> 8, (g * a) >> 8, (b * a) >> 8
590                 return uint8_t(b) + uint8_t(g) + uint8_t(r) + uint8_t(a)
603             def multiply(b, g, r, a):  argument
604                 r, g, b = (r * a) >> 8, (g * a) >> 8, (b * a) >> 8
605                 return uint32_t((a << 24) | (r << 16) | (g << 8) | (b << 0))
620                 r = (data >> 11) & 0x1f
624                 r, g, b = (r * a) // 255, (g * a) // 255, (b * a) // 255
625                 return uint16_t((r << 11) | (g << 5) | (b << 0))
645                 r = (data >> 11) & 0x1f
649                 r, g, b = (r * a) // 255, (g * a) // 255, (b * a) // 255
650                 return uint24_t((a << 16) | (r << 11) | (g << 5) | (b << 0))
915         for (r, g, b, a) in palette:
916             rawdata += uint32_t((a << 24) | (r << 16) | (g << 8) | (b << 0))
968             for r, g, b, a in zip(R, G, B, A):
969                 r, g, b, a = color_pre_multiply(r, g, b, a, self.background)
970                 r = self.sRGB_to_linear(r / 255.0)
973                 luma = 0.2126 * r + 0.7152 * g + 0.0722 * b
982             def pack(r, g, b, a):  argument
983                 return uint32_t((a << 24) | (r << 16) | (g << 8) | (b << 0))
986             def pack(r, g, b, a):  argument
987                 r, g, b, a = color_pre_multiply(r, g, b, a, self.background)
988                 return uint32_t((0xff << 24) | (r << 16) | (g << 8) | (b << 0))
991             def pack(r, g, b, a):  argument
992                 r, g, b, a = color_pre_multiply(r, g, b, a, self.background)
993                 return uint24_t((r << 16) | (g << 8) | (b << 0))
996             def pack(r, g, b, a):  argument
997                 r, g, b, a = color_pre_multiply(r, g, b, a, self.background)
998                 color = (r >> 3) << 11
1005             def pack(r, g, b, a):  argument
1006                 color = (r >> 3) << 11
1012             def pack(r, g, b, a):  argument
1013                 color = (r >> 3) << 11
1029             for x, (r, g, b, a) in enumerate(zip(R, G, B, A)):
1039                     r = min(r + red_thresh[treshold_id], 0xFF) & 0xF8
1043                 rawdata += pack(r, g, b, a)