// returns expanded * 5bits static inline uint32_t Filter_565_Expanded(unsigned x, unsigned y, uint32_t a00, uint32_t a01, uint32_t a10, uint32_t a11) { SkASSERT((unsigned)x <= 0xF); SkASSERT((unsigned)y <= 0xF); a00 = SkExpand_rgb_16(a00); a01 = SkExpand_rgb_16(a01); a10 = SkExpand_rgb_16(a10); a11 = SkExpand_rgb_16(a11); int xy = x * y >> 3; return a00 * (32 - 2*y - 2*x + xy) + a01 * (2*x - xy) + a10 * (2*y - xy) + a11 * xy; }
void SkRGB16BlitterBlitV_neon(uint16_t* device, int height, size_t deviceRB, unsigned scale, uint32_t src32) { if (height >= 8) { uint16_t* dst = device; // prepare constants uint16x8_t vdev = vdupq_n_u16(0); uint16x8_t vmaskq_g16 = vdupq_n_u16(SK_G16_MASK_IN_PLACE); uint16x8_t vmaskq_ng16 = vdupq_n_u16(~SK_G16_MASK_IN_PLACE); uint32x4_t vsrc32 = vdupq_n_u32(src32); uint32x4_t vscale5 = vdupq_n_u32((uint32_t)scale); while (height >= 8){ LOAD_LANE_16(vdev, 0) LOAD_LANE_16(vdev, 1) LOAD_LANE_16(vdev, 2) LOAD_LANE_16(vdev, 3) LOAD_LANE_16(vdev, 4) LOAD_LANE_16(vdev, 5) LOAD_LANE_16(vdev, 6) LOAD_LANE_16(vdev, 7) // Expand_rgb_16 uint16x8x2_t vdst = vzipq_u16((vdev & vmaskq_ng16), (vdev & vmaskq_g16)); uint32x4_t vdst32_lo = vmulq_u32(vreinterpretq_u32_u16(vdst.val[0]), vscale5); uint32x4_t vdst32_hi = vmulq_u32(vreinterpretq_u32_u16(vdst.val[1]), vscale5); // Compact_rgb_16 vdst32_lo = vaddq_u32(vdst32_lo, vsrc32); vdst32_hi = vaddq_u32(vdst32_hi, vsrc32); vdst32_lo = vshrq_n_u32(vdst32_lo, 5); vdst32_hi = vshrq_n_u32(vdst32_hi, 5); uint16x4_t vtmp_lo = vmovn_u32(vdst32_lo) & vget_low_u16(vmaskq_ng16); uint16x4_t vtmp_hi = vshrn_n_u32(vdst32_lo, 16) & vget_low_u16(vmaskq_g16); uint16x4_t vdst16_lo = vorr_u16(vtmp_lo, vtmp_hi); vtmp_lo = vmovn_u32(vdst32_hi) & vget_low_u16(vmaskq_ng16); vtmp_hi = vshrn_n_u32(vdst32_hi, 16) & vget_low_u16(vmaskq_g16); uint16x4_t vdst16_hi = vorr_u16(vtmp_lo, vtmp_hi); STORE_LANE_16(vdst16_lo, 0) STORE_LANE_16(vdst16_lo, 1) STORE_LANE_16(vdst16_lo, 2) STORE_LANE_16(vdst16_lo, 3) STORE_LANE_16(vdst16_hi, 0) STORE_LANE_16(vdst16_hi, 1) STORE_LANE_16(vdst16_hi, 2) STORE_LANE_16(vdst16_hi, 3) height -= 8; } } while (height != 0){ uint32_t dst32 = SkExpand_rgb_16(*device) * scale; *device = SkCompact_rgb_16((src32 + dst32) >> 5); device = (uint16_t*)((char*)device + deviceRB); height--; } }