| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkHalf.h" |
| #include "SkPM4fPriv.h" |
| #include "SkUtils.h" |
| #include "SkXfermode.h" |
| |
| static Sk4f lerp_by_coverage(const Sk4f& src, const Sk4f& dst, uint8_t srcCoverage) { |
| return dst + (src - dst) * Sk4f(srcCoverage * (1/255.0f)); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| static void xfer_1(const SkXfermode* xfer, uint64_t dst[], const SkPM4f* src, int count, |
| const SkAlpha aa[]) { |
| SkXfermodeProc4f proc = xfer->getProc4f(); |
| SkPM4f d; |
| if (aa) { |
| for (int i = 0; i < count; ++i) { |
| Sk4f d4 = SkHalfToFloat_finite_ftz(dst[i]); |
| d4.store(d.fVec); |
| Sk4f r4 = Sk4f::Load(proc(*src, d).fVec); |
| SkFloatToHalf_finite_ftz(lerp_by_coverage(r4, d4, aa[i])).store(&dst[i]); |
| } |
| } else { |
| for (int i = 0; i < count; ++i) { |
| SkHalfToFloat_finite_ftz(dst[i]).store(d.fVec); |
| Sk4f r4 = Sk4f::Load(proc(*src, d).fVec); |
| SkFloatToHalf_finite_ftz(r4).store(&dst[i]); |
| } |
| } |
| } |
| |
| static void xfer_n(const SkXfermode* xfer, uint64_t dst[], const SkPM4f src[], int count, |
| const SkAlpha aa[]) { |
| SkXfermodeProc4f proc = xfer->getProc4f(); |
| SkPM4f d; |
| if (aa) { |
| for (int i = 0; i < count; ++i) { |
| Sk4f d4 = SkHalfToFloat_finite_ftz(dst[i]); |
| d4.store(d.fVec); |
| Sk4f r4 = Sk4f::Load(proc(src[i], d).fVec); |
| SkFloatToHalf_finite_ftz(lerp_by_coverage(r4, d4, aa[i])).store(&dst[i]); |
| } |
| } else { |
| for (int i = 0; i < count; ++i) { |
| SkHalfToFloat_finite_ftz(dst[i]).store(d.fVec); |
| Sk4f r4 = Sk4f::Load(proc(src[i], d).fVec); |
| SkFloatToHalf_finite_ftz(r4).store(&dst[i]); |
| } |
| } |
| } |
| |
| const SkXfermode::F16Proc gProcs_General[] = { xfer_n, xfer_n, xfer_1, xfer_1 }; |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| static void clear(const SkXfermode*, uint64_t dst[], const SkPM4f*, int count, const SkAlpha aa[]) { |
| if (aa) { |
| for (int i = 0; i < count; ++i) { |
| if (aa[i]) { |
| const Sk4f d4 = SkHalfToFloat_finite_ftz(dst[i]); |
| SkFloatToHalf_finite_ftz(d4 * Sk4f((255 - aa[i]) * 1.0f/255)).store(&dst[i]); |
| } |
| } |
| } else { |
| sk_memset64(dst, 0, count); |
| } |
| } |
| |
| const SkXfermode::F16Proc gProcs_Clear[] = { clear, clear, clear, clear }; |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| static void src_1(const SkXfermode*, uint64_t dst[], const SkPM4f* src, int count, |
| const SkAlpha aa[]) { |
| const Sk4f s4 = Sk4f::Load(src->fVec); |
| if (aa) { |
| for (int i = 0; i < count; ++i) { |
| const Sk4f d4 = SkHalfToFloat_finite_ftz(dst[i]); |
| SkFloatToHalf_finite_ftz(lerp_by_coverage(s4, d4, aa[i])).store(&dst[i]); |
| } |
| } else { |
| uint64_t s4h; |
| SkFloatToHalf_finite_ftz(s4).store(&s4h); |
| sk_memset64(dst, s4h, count); |
| } |
| } |
| |
| static void src_n(const SkXfermode*, uint64_t dst[], const SkPM4f src[], int count, |
| const SkAlpha aa[]) { |
| if (aa) { |
| for (int i = 0; i < count; ++i) { |
| const Sk4f s4 = Sk4f::Load(src[i].fVec); |
| const Sk4f d4 = SkHalfToFloat_finite_ftz(dst[i]); |
| SkFloatToHalf_finite_ftz(lerp_by_coverage(s4, d4, aa[i])).store(&dst[i]); |
| } |
| } else { |
| for (int i = 0; i < count; ++i) { |
| const Sk4f s4 = Sk4f::Load(src[i].fVec); |
| SkFloatToHalf_finite_ftz(s4).store(&dst[i]); |
| } |
| } |
| } |
| |
| const SkXfermode::F16Proc gProcs_Src[] = { src_n, src_n, src_1, src_1 }; |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| static void dst(const SkXfermode*, uint64_t*, const SkPM4f*, int count, const SkAlpha[]) {} |
| |
| const SkXfermode::F16Proc gProcs_Dst[] = { dst, dst, dst, dst }; |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| static void srcover_1(const SkXfermode*, uint64_t dst[], const SkPM4f* src, int count, |
| const SkAlpha aa[]) { |
| const Sk4f s4 = Sk4f::Load(src->fVec); |
| const Sk4f dst_scale = Sk4f(1 - get_alpha(s4)); |
| for (int i = 0; i < count; ++i) { |
| const Sk4f d4 = SkHalfToFloat_finite_ftz(dst[i]); |
| const Sk4f r4 = s4 + d4 * dst_scale; |
| if (aa) { |
| SkFloatToHalf_finite_ftz(lerp_by_coverage(r4, d4, aa[i])).store(&dst[i]); |
| } else { |
| SkFloatToHalf_finite_ftz(r4).store(&dst[i]); |
| } |
| } |
| } |
| |
| static void srcover_n(const SkXfermode*, uint64_t dst[], const SkPM4f src[], int count, |
| const SkAlpha aa[]) { |
| for (int i = 0; i < count; ++i) { |
| Sk4f s = Sk4f::Load(src+i), |
| d = SkHalfToFloat_finite_ftz(dst[i]), |
| r = s + d*(1.0f - SkNx_shuffle<3,3,3,3>(s)); |
| if (aa) { |
| r = lerp_by_coverage(r, d, aa[i]); |
| } |
| SkFloatToHalf_finite_ftz(r).store(&dst[i]); |
| } |
| } |
| |
| const SkXfermode::F16Proc gProcs_SrcOver[] = { srcover_n, src_n, srcover_1, src_1 }; |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| static SkXfermode::F16Proc find_proc(SkXfermode::Mode mode, uint32_t flags) { |
| SkASSERT(0 == (flags & ~3)); |
| flags &= 3; |
| |
| switch (mode) { |
| case SkXfermode::kClear_Mode: return gProcs_Clear[flags]; |
| case SkXfermode::kSrc_Mode: return gProcs_Src[flags]; |
| case SkXfermode::kDst_Mode: return gProcs_Dst[flags]; |
| case SkXfermode::kSrcOver_Mode: return gProcs_SrcOver[flags]; |
| default: |
| break; |
| } |
| return gProcs_General[flags]; |
| } |
| |
| SkXfermode::F16Proc SkXfermode::onGetF16Proc(uint32_t flags) const { |
| SkASSERT(0 == (flags & ~3)); |
| flags &= 3; |
| |
| Mode mode; |
| return this->asMode(&mode) ? find_proc(mode, flags) : gProcs_General[flags]; |
| } |
| |
| SkXfermode::F16Proc SkXfermode::GetF16Proc(SkXfermode* xfer, uint32_t flags) { |
| return xfer ? xfer->onGetF16Proc(flags) : find_proc(SkXfermode::kSrcOver_Mode, flags); |
| } |