diff options
| -rw-r--r-- | src/opts/SkBlitRow_opts_arm_neon.cpp | 94 |
1 files changed, 93 insertions, 1 deletions
diff --git a/src/opts/SkBlitRow_opts_arm_neon.cpp b/src/opts/SkBlitRow_opts_arm_neon.cpp index 7868108378..200d85d1ea 100644 --- a/src/opts/SkBlitRow_opts_arm_neon.cpp +++ b/src/opts/SkBlitRow_opts_arm_neon.cpp @@ -760,6 +760,98 @@ void S32_Blend_BlitRow32_neon(SkPMColor* SK_RESTRICT dst, } } +void S32A_Blend_BlitRow32_neon(SkPMColor* SK_RESTRICT dst, + const SkPMColor* SK_RESTRICT src, + int count, U8CPU alpha) { + + SkASSERT(255 >= alpha); + + if (count <= 0) { + return; + } + + unsigned alpha256 = SkAlpha255To256(alpha); + + // First deal with odd counts + if (count & 1) { + uint8x8_t vsrc = vdup_n_u8(0), vdst = vdup_n_u8(0), vres; + uint16x8_t vdst_wide, vsrc_wide; + unsigned dst_scale; + + // Load + vsrc = vreinterpret_u8_u32(vld1_lane_u32(src, vreinterpret_u32_u8(vsrc), 0)); + vdst = vreinterpret_u8_u32(vld1_lane_u32(dst, vreinterpret_u32_u8(vdst), 0)); + + // Calc dst_scale + dst_scale = vget_lane_u8(vsrc, 3); + dst_scale *= alpha256; + dst_scale >>= 8; + dst_scale = 256 - dst_scale; + + // Process src + vsrc_wide = vmovl_u8(vsrc); + vsrc_wide = vmulq_n_u16(vsrc_wide, alpha256); + + // Process dst + vdst_wide = vmovl_u8(vdst); + vdst_wide = vmulq_n_u16(vdst_wide, dst_scale); + + // Combine + vres = vshrn_n_u16(vdst_wide, 8) + vshrn_n_u16(vsrc_wide, 8); + + vst1_lane_u32(dst, vreinterpret_u32_u8(vres), 0); + dst++; + src++; + count--; + } + + if (count) { + uint8x8_t alpha_mask; + static const uint8_t alpha_mask_setup[] = {3,3,3,3,7,7,7,7}; + alpha_mask = vld1_u8(alpha_mask_setup); + + do { + + uint8x8_t vsrc, vdst, vres, vsrc_alphas; + uint16x8_t vdst_wide, vsrc_wide, vsrc_scale, vdst_scale; + + __builtin_prefetch(src+32); + __builtin_prefetch(dst+32); + + // Load + vsrc = vreinterpret_u8_u32(vld1_u32(src)); + vdst = vreinterpret_u8_u32(vld1_u32(dst)); + + // Prepare src_scale + vsrc_scale = vdupq_n_u16(alpha256); + + // Calc dst_scale + vsrc_alphas = vtbl1_u8(vsrc, alpha_mask); + vdst_scale = vmovl_u8(vsrc_alphas); + vdst_scale *= vsrc_scale; + vdst_scale = vshrq_n_u16(vdst_scale, 8); + vdst_scale = vsubq_u16(vdupq_n_u16(256), vdst_scale); + + // Process src + vsrc_wide = vmovl_u8(vsrc); + vsrc_wide *= vsrc_scale; + + // Process dst + vdst_wide = vmovl_u8(vdst); + vdst_wide *= vdst_scale; + + // Combine + vres = vshrn_n_u16(vdst_wide, 8) + vshrn_n_u16(vsrc_wide, 8); + + vst1_u32(dst, vreinterpret_u32_u8(vres)); + + src += 2; + dst += 2; + count -= 2; + } while(count); + } +} + /////////////////////////////////////////////////////////////////////////////// #undef DEBUG_OPAQUE_DITHER @@ -1273,5 +1365,5 @@ const SkBlitRow::Proc32 sk_blitrow_platform_32_procs_arm_neon[] = { #else S32A_Opaque_BlitRow32_neon, // S32A_Opaque, #endif - S32A_Blend_BlitRow32_arm // S32A_Blend + S32A_Blend_BlitRow32_neon // S32A_Blend }; |