| |
| /* |
| * Copyright 2006 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| #include "SkXfermode.h" |
| #include "SkColorPriv.h" |
| #include "SkFlattenableBuffers.h" |
| #include "SkMathPriv.h" |
| #include "SkString.h" |
| |
| SK_DEFINE_INST_COUNT(SkXfermode) |
| |
| #define SkAlphaMulAlpha(a, b) SkMulDiv255Round(a, b) |
| |
| #if 0 |
| // idea for higher precision blends in xfer procs (and slightly faster) |
| // see DstATop as a probable caller |
| static U8CPU mulmuldiv255round(U8CPU a, U8CPU b, U8CPU c, U8CPU d) { |
| SkASSERT(a <= 255); |
| SkASSERT(b <= 255); |
| SkASSERT(c <= 255); |
| SkASSERT(d <= 255); |
| unsigned prod = SkMulS16(a, b) + SkMulS16(c, d) + 128; |
| unsigned result = (prod + (prod >> 8)) >> 8; |
| SkASSERT(result <= 255); |
| return result; |
| } |
| #endif |
| |
| static inline unsigned saturated_add(unsigned a, unsigned b) { |
| SkASSERT(a <= 255); |
| SkASSERT(b <= 255); |
| unsigned sum = a + b; |
| if (sum > 255) { |
| sum = 255; |
| } |
| return sum; |
| } |
| |
| static inline int clamp_signed_byte(int n) { |
| if (n < 0) { |
| n = 0; |
| } else if (n > 255) { |
| n = 255; |
| } |
| return n; |
| } |
| |
| static inline int clamp_div255round(int prod) { |
| if (prod <= 0) { |
| return 0; |
| } else if (prod >= 255*255) { |
| return 255; |
| } else { |
| return SkDiv255Round(prod); |
| } |
| } |
| |
| static inline int clamp_max(int value, int max) { |
| if (value > max) { |
| value = max; |
| } |
| return value; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| // kClear_Mode, //!< [0, 0] |
| static SkPMColor clear_modeproc(SkPMColor src, SkPMColor dst) { |
| return 0; |
| } |
| |
| // kSrc_Mode, //!< [Sa, Sc] |
| static SkPMColor src_modeproc(SkPMColor src, SkPMColor dst) { |
| return src; |
| } |
| |
| // kDst_Mode, //!< [Da, Dc] |
| static SkPMColor dst_modeproc(SkPMColor src, SkPMColor dst) { |
| return dst; |
| } |
| |
| // kSrcOver_Mode, //!< [Sa + Da - Sa*Da, Sc + (1 - Sa)*Dc] |
| static SkPMColor srcover_modeproc(SkPMColor src, SkPMColor dst) { |
| #if 0 |
| // this is the old, more-correct way, but it doesn't guarantee that dst==255 |
| // will always stay opaque |
| return src + SkAlphaMulQ(dst, SkAlpha255To256(255 - SkGetPackedA32(src))); |
| #else |
| // this is slightly faster, but more importantly guarantees that dst==255 |
| // will always stay opaque |
| return src + SkAlphaMulQ(dst, 256 - SkGetPackedA32(src)); |
| #endif |
| } |
| |
| // kDstOver_Mode, //!< [Sa + Da - Sa*Da, Dc + (1 - Da)*Sc] |
| static SkPMColor dstover_modeproc(SkPMColor src, SkPMColor dst) { |
| // this is the reverse of srcover, just flipping src and dst |
| // see srcover's comment about the 256 for opaqueness guarantees |
| return dst + SkAlphaMulQ(src, 256 - SkGetPackedA32(dst)); |
| } |
| |
| // kSrcIn_Mode, //!< [Sa * Da, Sc * Da] |
| static SkPMColor srcin_modeproc(SkPMColor src, SkPMColor dst) { |
| return SkAlphaMulQ(src, SkAlpha255To256(SkGetPackedA32(dst))); |
| } |
| |
| // kDstIn_Mode, //!< [Sa * Da, Sa * Dc] |
| static SkPMColor dstin_modeproc(SkPMColor src, SkPMColor dst) { |
| return SkAlphaMulQ(dst, SkAlpha255To256(SkGetPackedA32(src))); |
| } |
| |
| // kSrcOut_Mode, //!< [Sa * (1 - Da), Sc * (1 - Da)] |
| static SkPMColor srcout_modeproc(SkPMColor src, SkPMColor dst) { |
| return SkAlphaMulQ(src, SkAlpha255To256(255 - SkGetPackedA32(dst))); |
| } |
| |
| // kDstOut_Mode, //!< [Da * (1 - Sa), Dc * (1 - Sa)] |
| static SkPMColor dstout_modeproc(SkPMColor src, SkPMColor dst) { |
| return SkAlphaMulQ(dst, SkAlpha255To256(255 - SkGetPackedA32(src))); |
| } |
| |
| // kSrcATop_Mode, //!< [Da, Sc * Da + (1 - Sa) * Dc] |
| static SkPMColor srcatop_modeproc(SkPMColor src, SkPMColor dst) { |
| unsigned sa = SkGetPackedA32(src); |
| unsigned da = SkGetPackedA32(dst); |
| unsigned isa = 255 - sa; |
| |
| return SkPackARGB32(da, |
| SkAlphaMulAlpha(da, SkGetPackedR32(src)) + |
| SkAlphaMulAlpha(isa, SkGetPackedR32(dst)), |
| SkAlphaMulAlpha(da, SkGetPackedG32(src)) + |
| SkAlphaMulAlpha(isa, SkGetPackedG32(dst)), |
| SkAlphaMulAlpha(da, SkGetPackedB32(src)) + |
| SkAlphaMulAlpha(isa, SkGetPackedB32(dst))); |
| } |
| |
| // kDstATop_Mode, //!< [Sa, Sa * Dc + Sc * (1 - Da)] |
| static SkPMColor dstatop_modeproc(SkPMColor src, SkPMColor dst) { |
| unsigned sa = SkGetPackedA32(src); |
| unsigned da = SkGetPackedA32(dst); |
| unsigned ida = 255 - da; |
| |
| return SkPackARGB32(sa, |
| SkAlphaMulAlpha(ida, SkGetPackedR32(src)) + |
| SkAlphaMulAlpha(sa, SkGetPackedR32(dst)), |
| SkAlphaMulAlpha(ida, SkGetPackedG32(src)) + |
| SkAlphaMulAlpha(sa, SkGetPackedG32(dst)), |
| SkAlphaMulAlpha(ida, SkGetPackedB32(src)) + |
| SkAlphaMulAlpha(sa, SkGetPackedB32(dst))); |
| } |
| |
| // kXor_Mode [Sa + Da - 2 * Sa * Da, Sc * (1 - Da) + (1 - Sa) * Dc] |
| static SkPMColor xor_modeproc(SkPMColor src, SkPMColor dst) { |
| unsigned sa = SkGetPackedA32(src); |
| unsigned da = SkGetPackedA32(dst); |
| unsigned isa = 255 - sa; |
| unsigned ida = 255 - da; |
| |
| return SkPackARGB32(sa + da - (SkAlphaMulAlpha(sa, da) << 1), |
| SkAlphaMulAlpha(ida, SkGetPackedR32(src)) + |
| SkAlphaMulAlpha(isa, SkGetPackedR32(dst)), |
| SkAlphaMulAlpha(ida, SkGetPackedG32(src)) + |
| SkAlphaMulAlpha(isa, SkGetPackedG32(dst)), |
| SkAlphaMulAlpha(ida, SkGetPackedB32(src)) + |
| SkAlphaMulAlpha(isa, SkGetPackedB32(dst))); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| // kPlus_Mode |
| static SkPMColor plus_modeproc(SkPMColor src, SkPMColor dst) { |
| unsigned b = saturated_add(SkGetPackedB32(src), SkGetPackedB32(dst)); |
| unsigned g = saturated_add(SkGetPackedG32(src), SkGetPackedG32(dst)); |
| unsigned r = saturated_add(SkGetPackedR32(src), SkGetPackedR32(dst)); |
| unsigned a = saturated_add(SkGetPackedA32(src), SkGetPackedA32(dst)); |
| return SkPackARGB32(a, r, g, b); |
| } |
| |
| // kModulate_Mode |
| static SkPMColor modulate_modeproc(SkPMColor src, SkPMColor dst) { |
| int a = SkAlphaMulAlpha(SkGetPackedA32(src), SkGetPackedA32(dst)); |
| int r = SkAlphaMulAlpha(SkGetPackedR32(src), SkGetPackedR32(dst)); |
| int g = SkAlphaMulAlpha(SkGetPackedG32(src), SkGetPackedG32(dst)); |
| int b = SkAlphaMulAlpha(SkGetPackedB32(src), SkGetPackedB32(dst)); |
| return SkPackARGB32(a, r, g, b); |
| } |
| |
| // kScreen_Mode |
| static inline int srcover_byte(int a, int b) { |
| return a + b - SkAlphaMulAlpha(a, b); |
| } |
| static SkPMColor screen_modeproc(SkPMColor src, SkPMColor dst) { |
| int a = srcover_byte(SkGetPackedA32(src), SkGetPackedA32(dst)); |
| int r = srcover_byte(SkGetPackedR32(src), SkGetPackedR32(dst)); |
| int g = srcover_byte(SkGetPackedG32(src), SkGetPackedG32(dst)); |
| int b = srcover_byte(SkGetPackedB32(src), SkGetPackedB32(dst)); |
| return SkPackARGB32(a, r, g, b); |
| } |
| |
| // kOverlay_Mode |
| static inline int overlay_byte(int sc, int dc, int sa, int da) { |
| int tmp = sc * (255 - da) + dc * (255 - sa); |
| int rc; |
| if (2 * dc <= da) { |
| rc = 2 * sc * dc; |
| } else { |
| rc = sa * da - 2 * (da - dc) * (sa - sc); |
| } |
| return clamp_div255round(rc + tmp); |
| } |
| static SkPMColor overlay_modeproc(SkPMColor src, SkPMColor dst) { |
| int sa = SkGetPackedA32(src); |
| int da = SkGetPackedA32(dst); |
| int a = srcover_byte(sa, da); |
| int r = overlay_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); |
| int g = overlay_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); |
| int b = overlay_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); |
| return SkPackARGB32(a, r, g, b); |
| } |
| |
| // kDarken_Mode |
| static inline int darken_byte(int sc, int dc, int sa, int da) { |
| int sd = sc * da; |
| int ds = dc * sa; |
| if (sd < ds) { |
| // srcover |
| return sc + dc - SkDiv255Round(ds); |
| } else { |
| // dstover |
| return dc + sc - SkDiv255Round(sd); |
| } |
| } |
| static SkPMColor darken_modeproc(SkPMColor src, SkPMColor dst) { |
| int sa = SkGetPackedA32(src); |
| int da = SkGetPackedA32(dst); |
| int a = srcover_byte(sa, da); |
| int r = darken_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); |
| int g = darken_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); |
| int b = darken_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); |
| return SkPackARGB32(a, r, g, b); |
| } |
| |
| // kLighten_Mode |
| static inline int lighten_byte(int sc, int dc, int sa, int da) { |
| int sd = sc * da; |
| int ds = dc * sa; |
| if (sd > ds) { |
| // srcover |
| return sc + dc - SkDiv255Round(ds); |
| } else { |
| // dstover |
| return dc + sc - SkDiv255Round(sd); |
| } |
| } |
| static SkPMColor lighten_modeproc(SkPMColor src, SkPMColor dst) { |
| int sa = SkGetPackedA32(src); |
| int da = SkGetPackedA32(dst); |
| int a = srcover_byte(sa, da); |
| int r = lighten_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); |
| int g = lighten_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); |
| int b = lighten_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); |
| return SkPackARGB32(a, r, g, b); |
| } |
| |
| // kColorDodge_Mode |
| static inline int colordodge_byte(int sc, int dc, int sa, int da) { |
| int diff = sa - sc; |
| int rc; |
| if (0 == diff) { |
| rc = sa * da + sc * (255 - da) + dc * (255 - sa); |
| rc = SkDiv255Round(rc); |
| } else { |
| int tmp = (dc * sa << 15) / (da * diff); |
| rc = SkDiv255Round(sa * da) * tmp >> 15; |
| // don't clamp here, since we'll do it in our modeproc |
| } |
| return rc; |
| } |
| static SkPMColor colordodge_modeproc(SkPMColor src, SkPMColor dst) { |
| // added to avoid div-by-zero in colordodge_byte |
| if (0 == dst) { |
| return src; |
| } |
| |
| int sa = SkGetPackedA32(src); |
| int da = SkGetPackedA32(dst); |
| int a = srcover_byte(sa, da); |
| int r = colordodge_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); |
| int g = colordodge_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); |
| int b = colordodge_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); |
| r = clamp_max(r, a); |
| g = clamp_max(g, a); |
| b = clamp_max(b, a); |
| return SkPackARGB32(a, r, g, b); |
| } |
| |
| // kColorBurn_Mode |
| static inline int colorburn_byte(int sc, int dc, int sa, int da) { |
| int rc; |
| if (dc == da && 0 == sc) { |
| rc = sa * da + dc * (255 - sa); |
| } else if (0 == sc) { |
| return SkAlphaMulAlpha(dc, 255 - sa); |
| } else { |
| int tmp = (sa * (da - dc) * 256) / (sc * da); |
| if (tmp > 256) { |
| tmp = 256; |
| } |
| int tmp2 = sa * da; |
| rc = tmp2 - (tmp2 * tmp >> 8) + sc * (255 - da) + dc * (255 - sa); |
| } |
| return SkDiv255Round(rc); |
| } |
| static SkPMColor colorburn_modeproc(SkPMColor src, SkPMColor dst) { |
| // added to avoid div-by-zero in colorburn_byte |
| if (0 == dst) { |
| return src; |
| } |
| |
| int sa = SkGetPackedA32(src); |
| int da = SkGetPackedA32(dst); |
| int a = srcover_byte(sa, da); |
| int r = colorburn_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); |
| int g = colorburn_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); |
| int b = colorburn_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); |
| return SkPackARGB32(a, r, g, b); |
| } |
| |
| // kHardLight_Mode |
| static inline int hardlight_byte(int sc, int dc, int sa, int da) { |
| int rc; |
| if (2 * sc <= sa) { |
| rc = 2 * sc * dc; |
| } else { |
| rc = sa * da - 2 * (da - dc) * (sa - sc); |
| } |
| return clamp_div255round(rc + sc * (255 - da) + dc * (255 - sa)); |
| } |
| static SkPMColor hardlight_modeproc(SkPMColor src, SkPMColor dst) { |
| int sa = SkGetPackedA32(src); |
| int da = SkGetPackedA32(dst); |
| int a = srcover_byte(sa, da); |
| int r = hardlight_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); |
| int g = hardlight_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); |
| int b = hardlight_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); |
| return SkPackARGB32(a, r, g, b); |
| } |
| |
| // returns 255 * sqrt(n/255) |
| static U8CPU sqrt_unit_byte(U8CPU n) { |
| return SkSqrtBits(n, 15+4); |
| } |
| |
| // kSoftLight_Mode |
| static inline int softlight_byte(int sc, int dc, int sa, int da) { |
| int m = da ? dc * 256 / da : 0; |
| int rc; |
| if (2 * sc <= sa) { |
| rc = dc * (sa + ((2 * sc - sa) * (256 - m) >> 8)); |
| } else if (4 * dc <= da) { |
| int tmp = (4 * m * (4 * m + 256) * (m - 256) >> 16) + 7 * m; |
| rc = dc * sa + (da * (2 * sc - sa) * tmp >> 8); |
| } else { |
| int tmp = sqrt_unit_byte(m) - m; |
| rc = dc * sa + (da * (2 * sc - sa) * tmp >> 8); |
| } |
| return clamp_div255round(rc + sc * (255 - da) + dc * (255 - sa)); |
| } |
| static SkPMColor softlight_modeproc(SkPMColor src, SkPMColor dst) { |
| int sa = SkGetPackedA32(src); |
| int da = SkGetPackedA32(dst); |
| int a = srcover_byte(sa, da); |
| int r = softlight_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); |
| int g = softlight_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); |
| int b = softlight_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); |
| return SkPackARGB32(a, r, g, b); |
| } |
| |
| // kDifference_Mode |
| static inline int difference_byte(int sc, int dc, int sa, int da) { |
| int tmp = SkMin32(sc * da, dc * sa); |
| return clamp_signed_byte(sc + dc - 2 * SkDiv255Round(tmp)); |
| } |
| static SkPMColor difference_modeproc(SkPMColor src, SkPMColor dst) { |
| int sa = SkGetPackedA32(src); |
| int da = SkGetPackedA32(dst); |
| int a = srcover_byte(sa, da); |
| int r = difference_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); |
| int g = difference_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); |
| int b = difference_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); |
| return SkPackARGB32(a, r, g, b); |
| } |
| |
| // kExclusion_Mode |
| static inline int exclusion_byte(int sc, int dc, int sa, int da) { |
| // this equations is wacky, wait for SVG to confirm it |
| int r = sc * da + dc * sa - 2 * sc * dc + sc * (255 - da) + dc * (255 - sa); |
| return clamp_div255round(r); |
| } |
| static SkPMColor exclusion_modeproc(SkPMColor src, SkPMColor dst) { |
| int sa = SkGetPackedA32(src); |
| int da = SkGetPackedA32(dst); |
| int a = srcover_byte(sa, da); |
| int r = exclusion_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); |
| int g = exclusion_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); |
| int b = exclusion_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); |
| return SkPackARGB32(a, r, g, b); |
| } |
| |
| struct ProcCoeff { |
| SkXfermodeProc fProc; |
| SkXfermode::Coeff fSC; |
| SkXfermode::Coeff fDC; |
| }; |
| |
| #define CANNOT_USE_COEFF SkXfermode::Coeff(-1) |
| |
| static const ProcCoeff gProcCoeffs[] = { |
| { clear_modeproc, SkXfermode::kZero_Coeff, SkXfermode::kZero_Coeff }, |
| { src_modeproc, SkXfermode::kOne_Coeff, SkXfermode::kZero_Coeff }, |
| { dst_modeproc, SkXfermode::kZero_Coeff, SkXfermode::kOne_Coeff }, |
| { srcover_modeproc, SkXfermode::kOne_Coeff, SkXfermode::kISA_Coeff }, |
| { dstover_modeproc, SkXfermode::kIDA_Coeff, SkXfermode::kOne_Coeff }, |
| { srcin_modeproc, SkXfermode::kDA_Coeff, SkXfermode::kZero_Coeff }, |
| { dstin_modeproc, SkXfermode::kZero_Coeff, SkXfermode::kSA_Coeff }, |
| { srcout_modeproc, SkXfermode::kIDA_Coeff, SkXfermode::kZero_Coeff }, |
| { dstout_modeproc, SkXfermode::kZero_Coeff, SkXfermode::kISA_Coeff }, |
| { srcatop_modeproc, SkXfermode::kDA_Coeff, SkXfermode::kISA_Coeff }, |
| { dstatop_modeproc, SkXfermode::kIDA_Coeff, SkXfermode::kSA_Coeff }, |
| { xor_modeproc, SkXfermode::kIDA_Coeff, SkXfermode::kISA_Coeff }, |
| |
| { plus_modeproc, SkXfermode::kOne_Coeff, SkXfermode::kOne_Coeff }, |
| { modulate_modeproc,SkXfermode::kZero_Coeff, SkXfermode::kSC_Coeff }, |
| { screen_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| { overlay_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| { darken_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| { lighten_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| { colordodge_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| { colorburn_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| { hardlight_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| { softlight_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| { difference_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| { exclusion_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| bool SkXfermode::asCoeff(Coeff* src, Coeff* dst) const { |
| return false; |
| } |
| |
| bool SkXfermode::asMode(Mode* mode) const { |
| return false; |
| } |
| |
| SkPMColor SkXfermode::xferColor(SkPMColor src, SkPMColor dst) const{ |
| // no-op. subclasses should override this |
| return dst; |
| } |
| |
| void SkXfermode::xfer32(SkPMColor* SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT src, int count, |
| const SkAlpha* SK_RESTRICT aa) const { |
| SkASSERT(dst && src && count >= 0); |
| |
| if (NULL == aa) { |
| for (int i = count - 1; i >= 0; --i) { |
| dst[i] = this->xferColor(src[i], dst[i]); |
| } |
| } else { |
| for (int i = count - 1; i >= 0; --i) { |
| unsigned a = aa[i]; |
| if (0 != a) { |
| SkPMColor dstC = dst[i]; |
| SkPMColor C = this->xferColor(src[i], dstC); |
| if (0xFF != a) { |
| C = SkFourByteInterp(C, dstC, a); |
| } |
| dst[i] = C; |
| } |
| } |
| } |
| } |
| |
| void SkXfermode::xfer16(uint16_t* dst, |
| const SkPMColor* SK_RESTRICT src, int count, |
| const SkAlpha* SK_RESTRICT aa) const { |
| SkASSERT(dst && src && count >= 0); |
| |
| if (NULL == aa) { |
| for (int i = count - 1; i >= 0; --i) { |
| SkPMColor dstC = SkPixel16ToPixel32(dst[i]); |
| dst[i] = SkPixel32ToPixel16_ToU16(this->xferColor(src[i], dstC)); |
| } |
| } else { |
| for (int i = count - 1; i >= 0; --i) { |
| unsigned a = aa[i]; |
| if (0 != a) { |
| SkPMColor dstC = SkPixel16ToPixel32(dst[i]); |
| SkPMColor C = this->xferColor(src[i], dstC); |
| if (0xFF != a) { |
| C = SkFourByteInterp(C, dstC, a); |
| } |
| dst[i] = SkPixel32ToPixel16_ToU16(C); |
| } |
| } |
| } |
| } |
| |
| void SkXfermode::xfer4444(SkPMColor16* SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT src, int count, |
| const SkAlpha* SK_RESTRICT aa) const { |
| SkASSERT(dst && src && count >= 0); |
| |
| if (NULL == aa) { |
| for (int i = count - 1; i >= 0; --i) { |
| SkPMColor dstC = SkPixel4444ToPixel32(dst[i]); |
| dst[i] = SkPixel32ToPixel4444(this->xferColor(src[i], dstC)); |
| } |
| } else { |
| for (int i = count - 1; i >= 0; --i) { |
| unsigned a = aa[i]; |
| if (0 != a) { |
| SkPMColor dstC = SkPixel4444ToPixel32(dst[i]); |
| SkPMColor C = this->xferColor(src[i], dstC); |
| if (0xFF != a) { |
| C = SkFourByteInterp(C, dstC, a); |
| } |
| dst[i] = SkPixel32ToPixel4444(C); |
| } |
| } |
| } |
| } |
| |
| void SkXfermode::xferA8(SkAlpha* SK_RESTRICT dst, |
| const SkPMColor src[], int count, |
| const SkAlpha* SK_RESTRICT aa) const { |
| SkASSERT(dst && src && count >= 0); |
| |
| if (NULL == aa) { |
| for (int i = count - 1; i >= 0; --i) { |
| SkPMColor res = this->xferColor(src[i], (dst[i] << SK_A32_SHIFT)); |
| dst[i] = SkToU8(SkGetPackedA32(res)); |
| } |
| } else { |
| for (int i = count - 1; i >= 0; --i) { |
| unsigned a = aa[i]; |
| if (0 != a) { |
| SkAlpha dstA = dst[i]; |
| unsigned A = SkGetPackedA32(this->xferColor(src[i], |
| (SkPMColor)(dstA << SK_A32_SHIFT))); |
| if (0xFF != a) { |
| A = SkAlphaBlend(A, dstA, SkAlpha255To256(a)); |
| } |
| dst[i] = SkToU8(A); |
| } |
| } |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void SkProcXfermode::xfer32(SkPMColor* SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT src, int count, |
| const SkAlpha* SK_RESTRICT aa) const { |
| SkASSERT(dst && src && count >= 0); |
| |
| SkXfermodeProc proc = fProc; |
| |
| if (NULL != proc) { |
| if (NULL == aa) { |
| for (int i = count - 1; i >= 0; --i) { |
| dst[i] = proc(src[i], dst[i]); |
| } |
| } else { |
| for (int i = count - 1; i >= 0; --i) { |
| unsigned a = aa[i]; |
| if (0 != a) { |
| SkPMColor dstC = dst[i]; |
| SkPMColor C = proc(src[i], dstC); |
| if (a != 0xFF) { |
| C = SkFourByteInterp(C, dstC, a); |
| } |
| dst[i] = C; |
| } |
| } |
| } |
| } |
| } |
| |
| void SkProcXfermode::xfer16(uint16_t* SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT src, int count, |
| const SkAlpha* SK_RESTRICT aa) const { |
| SkASSERT(dst && src && count >= 0); |
| |
| SkXfermodeProc proc = fProc; |
| |
| if (NULL != proc) { |
| if (NULL == aa) { |
| for (int i = count - 1; i >= 0; --i) { |
| SkPMColor dstC = SkPixel16ToPixel32(dst[i]); |
| dst[i] = SkPixel32ToPixel16_ToU16(proc(src[i], dstC)); |
| } |
| } else { |
| for (int i = count - 1; i >= 0; --i) { |
| unsigned a = aa[i]; |
| if (0 != a) { |
| SkPMColor dstC = SkPixel16ToPixel32(dst[i]); |
| SkPMColor C = proc(src[i], dstC); |
| if (0xFF != a) { |
| C = SkFourByteInterp(C, dstC, a); |
| } |
| dst[i] = SkPixel32ToPixel16_ToU16(C); |
| } |
| } |
| } |
| } |
| } |
| |
| void SkProcXfermode::xfer4444(SkPMColor16* SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT src, int count, |
| const SkAlpha* SK_RESTRICT aa) const { |
| SkASSERT(dst && src && count >= 0); |
| |
| SkXfermodeProc proc = fProc; |
| |
| if (NULL != proc) { |
| if (NULL == aa) { |
| for (int i = count - 1; i >= 0; --i) { |
| SkPMColor dstC = SkPixel4444ToPixel32(dst[i]); |
| dst[i] = SkPixel32ToPixel4444(proc(src[i], dstC)); |
| } |
| } else { |
| for (int i = count - 1; i >= 0; --i) { |
| unsigned a = aa[i]; |
| if (0 != a) { |
| SkPMColor dstC = SkPixel4444ToPixel32(dst[i]); |
| SkPMColor C = proc(src[i], dstC); |
| if (0xFF != a) { |
| C = SkFourByteInterp(C, dstC, a); |
| } |
| dst[i] = SkPixel32ToPixel4444(C); |
| } |
| } |
| } |
| } |
| } |
| |
| void SkProcXfermode::xferA8(SkAlpha* SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT src, int count, |
| const SkAlpha* SK_RESTRICT aa) const { |
| SkASSERT(dst && src && count >= 0); |
| |
| SkXfermodeProc proc = fProc; |
| |
| if (NULL != proc) { |
| if (NULL == aa) { |
| for (int i = count - 1; i >= 0; --i) { |
| SkPMColor res = proc(src[i], dst[i] << SK_A32_SHIFT); |
| dst[i] = SkToU8(SkGetPackedA32(res)); |
| } |
| } else { |
| for (int i = count - 1; i >= 0; --i) { |
| unsigned a = aa[i]; |
| if (0 != a) { |
| SkAlpha dstA = dst[i]; |
| SkPMColor res = proc(src[i], dstA << SK_A32_SHIFT); |
| unsigned A = SkGetPackedA32(res); |
| if (0xFF != a) { |
| A = SkAlphaBlend(A, dstA, SkAlpha255To256(a)); |
| } |
| dst[i] = SkToU8(A); |
| } |
| } |
| } |
| } |
| } |
| |
| SkProcXfermode::SkProcXfermode(SkFlattenableReadBuffer& buffer) |
| : SkXfermode(buffer) { |
| fProc = NULL; |
| if (!buffer.isCrossProcess()) { |
| fProc = (SkXfermodeProc)buffer.readFunctionPtr(); |
| } |
| } |
| |
| void SkProcXfermode::flatten(SkFlattenableWriteBuffer& buffer) const { |
| this->INHERITED::flatten(buffer); |
| if (!buffer.isCrossProcess()) { |
| buffer.writeFunctionPtr((void*)fProc); |
| } |
| } |
| |
| #ifdef SK_DEVELOPER |
| void SkProcXfermode::toString(SkString* str) const { |
| str->appendf("SkProcXfermode: %p", fProc); |
| } |
| #endif |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class SkProcCoeffXfermode : public SkProcXfermode { |
| public: |
| SkProcCoeffXfermode(const ProcCoeff& rec, Mode mode) |
| : INHERITED(rec.fProc) { |
| fMode = mode; |
| // these may be valid, or may be CANNOT_USE_COEFF |
| fSrcCoeff = rec.fSC; |
| fDstCoeff = rec.fDC; |
| } |
| |
| virtual bool asMode(Mode* mode) const SK_OVERRIDE { |
| if (mode) { |
| *mode = fMode; |
| } |
| return true; |
| } |
| |
| virtual bool asCoeff(Coeff* sc, Coeff* dc) const SK_OVERRIDE { |
| if (CANNOT_USE_COEFF == fSrcCoeff) { |
| return false; |
| } |
| |
| if (sc) { |
| *sc = fSrcCoeff; |
| } |
| if (dc) { |
| *dc = fDstCoeff; |
| } |
| return true; |
| } |
| |
| SK_DEVELOPER_TO_STRING() |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkProcCoeffXfermode) |
| |
| protected: |
| SkProcCoeffXfermode(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { |
| fMode = (SkXfermode::Mode)buffer.read32(); |
| |
| const ProcCoeff& rec = gProcCoeffs[fMode]; |
| // these may be valid, or may be CANNOT_USE_COEFF |
| fSrcCoeff = rec.fSC; |
| fDstCoeff = rec.fDC; |
| // now update our function-ptr in the super class |
| this->INHERITED::setProc(rec.fProc); |
| } |
| |
| virtual void flatten(SkFlattenableWriteBuffer& buffer) const SK_OVERRIDE { |
| this->INHERITED::flatten(buffer); |
| buffer.write32(fMode); |
| } |
| |
| private: |
| Mode fMode; |
| Coeff fSrcCoeff, fDstCoeff; |
| |
| typedef SkProcXfermode INHERITED; |
| }; |
| |
| #ifdef SK_DEVELOPER |
| void SkProcCoeffXfermode::toString(SkString* str) const { |
| str->append("SkProcCoeffXfermode: "); |
| |
| const char *gModeStrings[kLastMode+1] = { |
| "Clear", "Src", "Dst", "SrcOver", "DstOver", "SrcIn", "DstIn", |
| "SrcOut", "DstOut", "SrcATop", "DstATop", "Xor", "Plus", |
| "Modulate", "Screen", "Overlay", "Darken", "Lighten", "ColorDodge", |
| "ColorBurn", "HardLight", "SoftLight", "Difference", "Exclusion" |
| }; |
| |
| str->append("mode: "); |
| str->append(gModeStrings[fMode]); |
| |
| static const char* gCoeffStrings[kCoeffCount] = { |
| "Zero", "One", "SC", "ISC", "DC", "IDC", "SA", "ISA", "DA", "IDA" |
| }; |
| |
| str->append(" src: "); |
| if (CANNOT_USE_COEFF == fSrcCoeff) { |
| str->append("can't use"); |
| } else { |
| str->append(gCoeffStrings[fSrcCoeff]); |
| } |
| |
| str->append(" dst: "); |
| if (CANNOT_USE_COEFF == fDstCoeff) { |
| str->append("can't use"); |
| } else { |
| str->append(gCoeffStrings[fDstCoeff]); |
| } |
| } |
| #endif |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class SkClearXfermode : public SkProcCoeffXfermode { |
| public: |
| SkClearXfermode(const ProcCoeff& rec) : SkProcCoeffXfermode(rec, kClear_Mode) {} |
| |
| virtual void xfer32(SkPMColor*, const SkPMColor*, int, const SkAlpha*) const SK_OVERRIDE; |
| virtual void xferA8(SkAlpha*, const SkPMColor*, int, const SkAlpha*) const SK_OVERRIDE; |
| |
| SK_DEVELOPER_TO_STRING() |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkClearXfermode) |
| |
| private: |
| SkClearXfermode(SkFlattenableReadBuffer& buffer) |
| : SkProcCoeffXfermode(buffer) {} |
| |
| typedef SkProcCoeffXfermode INHERITED; |
| }; |
| |
| void SkClearXfermode::xfer32(SkPMColor* SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT, int count, |
| const SkAlpha* SK_RESTRICT aa) const { |
| SkASSERT(dst && count >= 0); |
| |
| if (NULL == aa) { |
| memset(dst, 0, count << 2); |
| } else { |
| for (int i = count - 1; i >= 0; --i) { |
| unsigned a = aa[i]; |
| if (0xFF == a) { |
| dst[i] = 0; |
| } else if (a != 0) { |
| dst[i] = SkAlphaMulQ(dst[i], SkAlpha255To256(255 - a)); |
| } |
| } |
| } |
| } |
| void SkClearXfermode::xferA8(SkAlpha* SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT, int count, |
| const SkAlpha* SK_RESTRICT aa) const { |
| SkASSERT(dst && count >= 0); |
| |
| if (NULL == aa) { |
| memset(dst, 0, count); |
| } else { |
| for (int i = count - 1; i >= 0; --i) { |
| unsigned a = aa[i]; |
| if (0xFF == a) { |
| dst[i] = 0; |
| } else if (0 != a) { |
| dst[i] = SkAlphaMulAlpha(dst[i], 255 - a); |
| } |
| } |
| } |
| } |
| |
| #ifdef SK_DEVELOPER |
| void SkClearXfermode::toString(SkString* str) const { |
| this->INHERITED::toString(str); |
| } |
| #endif |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class SkSrcXfermode : public SkProcCoeffXfermode { |
| public: |
| SkSrcXfermode(const ProcCoeff& rec) : SkProcCoeffXfermode(rec, kSrc_Mode) {} |
| |
| virtual void xfer32(SkPMColor*, const SkPMColor*, int, const SkAlpha*) const SK_OVERRIDE; |
| virtual void xferA8(SkAlpha*, const SkPMColor*, int, const SkAlpha*) const SK_OVERRIDE; |
| |
| SK_DEVELOPER_TO_STRING() |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkSrcXfermode) |
| |
| private: |
| SkSrcXfermode(SkFlattenableReadBuffer& buffer) |
| : SkProcCoeffXfermode(buffer) {} |
| |
| typedef SkProcCoeffXfermode INHERITED; |
| }; |
| |
| void SkSrcXfermode::xfer32(SkPMColor* SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT src, int count, |
| const SkAlpha* SK_RESTRICT aa) const { |
| SkASSERT(dst && src && count >= 0); |
| |
| if (NULL == aa) { |
| memcpy(dst, src, count << 2); |
| } else { |
| for (int i = count - 1; i >= 0; --i) { |
| unsigned a = aa[i]; |
| if (a == 0xFF) { |
| dst[i] = src[i]; |
| } else if (a != 0) { |
| dst[i] = SkFourByteInterp(src[i], dst[i], a); |
| } |
| } |
| } |
| } |
| |
| void SkSrcXfermode::xferA8(SkAlpha* SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT src, int count, |
| const SkAlpha* SK_RESTRICT aa) const { |
| SkASSERT(dst && src && count >= 0); |
| |
| if (NULL == aa) { |
| for (int i = count - 1; i >= 0; --i) { |
| dst[i] = SkToU8(SkGetPackedA32(src[i])); |
| } |
| } else { |
| for (int i = count - 1; i >= 0; --i) { |
| unsigned a = aa[i]; |
| if (0 != a) { |
| unsigned srcA = SkGetPackedA32(src[i]); |
| if (a == 0xFF) { |
| dst[i] = SkToU8(srcA); |
| } else { |
| dst[i] = SkToU8(SkAlphaBlend(srcA, dst[i], a)); |
| } |
| } |
| } |
| } |
| } |
| #ifdef SK_DEVELOPER |
| void SkSrcXfermode::toString(SkString* str) const { |
| this->INHERITED::toString(str); |
| } |
| #endif |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class SkDstInXfermode : public SkProcCoeffXfermode { |
| public: |
| SkDstInXfermode(const ProcCoeff& rec) : SkProcCoeffXfermode(rec, kDstIn_Mode) {} |
| |
| virtual void xfer32(SkPMColor*, const SkPMColor*, int, const SkAlpha*) const SK_OVERRIDE; |
| |
| SK_DEVELOPER_TO_STRING() |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDstInXfermode) |
| |
| private: |
| SkDstInXfermode(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) {} |
| |
| typedef SkProcCoeffXfermode INHERITED; |
| }; |
| |
| void SkDstInXfermode::xfer32(SkPMColor* SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT src, int count, |
| const SkAlpha* SK_RESTRICT aa) const { |
| SkASSERT(dst && src); |
| |
| if (count <= 0) { |
| return; |
| } |
| if (NULL != aa) { |
| return this->INHERITED::xfer32(dst, src, count, aa); |
| } |
| |
| do { |
| unsigned a = SkGetPackedA32(*src); |
| *dst = SkAlphaMulQ(*dst, SkAlpha255To256(a)); |
| dst++; |
| src++; |
| } while (--count != 0); |
| } |
| |
| #ifdef SK_DEVELOPER |
| void SkDstInXfermode::toString(SkString* str) const { |
| this->INHERITED::toString(str); |
| } |
| #endif |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class SkDstOutXfermode : public SkProcCoeffXfermode { |
| public: |
| SkDstOutXfermode(const ProcCoeff& rec) : SkProcCoeffXfermode(rec, kDstOut_Mode) {} |
| |
| virtual void xfer32(SkPMColor*, const SkPMColor*, int, const SkAlpha*) const SK_OVERRIDE; |
| |
| SK_DEVELOPER_TO_STRING() |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDstOutXfermode) |
| |
| private: |
| SkDstOutXfermode(SkFlattenableReadBuffer& buffer) |
| : INHERITED(buffer) {} |
| |
| typedef SkProcCoeffXfermode INHERITED; |
| }; |
| |
| void SkDstOutXfermode::xfer32(SkPMColor* SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT src, int count, |
| const SkAlpha* SK_RESTRICT aa) const { |
| SkASSERT(dst && src); |
| |
| if (count <= 0) { |
| return; |
| } |
| if (NULL != aa) { |
| return this->INHERITED::xfer32(dst, src, count, aa); |
| } |
| |
| do { |
| unsigned a = SkGetPackedA32(*src); |
| *dst = SkAlphaMulQ(*dst, SkAlpha255To256(255 - a)); |
| dst++; |
| src++; |
| } while (--count != 0); |
| } |
| |
| #ifdef SK_DEVELOPER |
| void SkDstOutXfermode::toString(SkString* str) const { |
| this->INHERITED::toString(str); |
| } |
| #endif |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkXfermode* SkXfermode::Create(Mode mode) { |
| SkASSERT(SK_ARRAY_COUNT(gProcCoeffs) == kModeCount); |
| SkASSERT((unsigned)mode < kModeCount); |
| |
| const ProcCoeff& rec = gProcCoeffs[mode]; |
| |
| switch (mode) { |
| case kClear_Mode: |
| return SkNEW_ARGS(SkClearXfermode, (rec)); |
| case kSrc_Mode: |
| return SkNEW_ARGS(SkSrcXfermode, (rec)); |
| case kSrcOver_Mode: |
| return NULL; |
| case kDstIn_Mode: |
| return SkNEW_ARGS(SkDstInXfermode, (rec)); |
| case kDstOut_Mode: |
| return SkNEW_ARGS(SkDstOutXfermode, (rec)); |
| default: |
| return SkNEW_ARGS(SkProcCoeffXfermode, (rec, mode)); |
| } |
| } |
| |
| SkXfermodeProc SkXfermode::GetProc(Mode mode) { |
| SkXfermodeProc proc = NULL; |
| if ((unsigned)mode < kModeCount) { |
| proc = gProcCoeffs[mode].fProc; |
| } |
| return proc; |
| } |
| |
| bool SkXfermode::ModeAsCoeff(Mode mode, Coeff* src, Coeff* dst) { |
| SkASSERT(SK_ARRAY_COUNT(gProcCoeffs) == kModeCount); |
| |
| if ((unsigned)mode >= (unsigned)kModeCount) { |
| // illegal mode parameter |
| return false; |
| } |
| |
| const ProcCoeff& rec = gProcCoeffs[mode]; |
| |
| if (CANNOT_USE_COEFF == rec.fSC) { |
| return false; |
| } |
| |
| SkASSERT(CANNOT_USE_COEFF != rec.fDC); |
| if (src) { |
| *src = rec.fSC; |
| } |
| if (dst) { |
| *dst = rec.fDC; |
| } |
| return true; |
| } |
| |
| bool SkXfermode::AsMode(const SkXfermode* xfer, Mode* mode) { |
| if (NULL == xfer) { |
| if (mode) { |
| *mode = kSrcOver_Mode; |
| } |
| return true; |
| } |
| return xfer->asMode(mode); |
| } |
| |
| bool SkXfermode::AsCoeff(const SkXfermode* xfer, Coeff* src, Coeff* dst) { |
| if (NULL == xfer) { |
| return ModeAsCoeff(kSrcOver_Mode, src, dst); |
| } |
| return xfer->asCoeff(src, dst); |
| } |
| |
| bool SkXfermode::IsMode(const SkXfermode* xfer, Mode mode) { |
| // if xfer==null then the mode is srcover |
| Mode m = kSrcOver_Mode; |
| if (xfer && !xfer->asMode(&m)) { |
| return false; |
| } |
| return mode == m; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| //////////// 16bit xfermode procs |
| |
| #ifdef SK_DEBUG |
| static bool require_255(SkPMColor src) { return SkGetPackedA32(src) == 0xFF; } |
| static bool require_0(SkPMColor src) { return SkGetPackedA32(src) == 0; } |
| #endif |
| |
| static uint16_t src_modeproc16_255(SkPMColor src, uint16_t dst) { |
| SkASSERT(require_255(src)); |
| return SkPixel32ToPixel16(src); |
| } |
| |
| static uint16_t dst_modeproc16(SkPMColor src, uint16_t dst) { |
| return dst; |
| } |
| |
| static uint16_t srcover_modeproc16_0(SkPMColor src, uint16_t dst) { |
| SkASSERT(require_0(src)); |
| return dst; |
| } |
| |
| static uint16_t srcover_modeproc16_255(SkPMColor src, uint16_t dst) { |
| SkASSERT(require_255(src)); |
| return SkPixel32ToPixel16(src); |
| } |
| |
| static uint16_t dstover_modeproc16_0(SkPMColor src, uint16_t dst) { |
| SkASSERT(require_0(src)); |
| return dst; |
| } |
| |
| static uint16_t dstover_modeproc16_255(SkPMColor src, uint16_t dst) { |
| SkASSERT(require_255(src)); |
| return dst; |
| } |
| |
| static uint16_t srcin_modeproc16_255(SkPMColor src, uint16_t dst) { |
| SkASSERT(require_255(src)); |
| return SkPixel32ToPixel16(src); |
| } |
| |
| static uint16_t dstin_modeproc16_255(SkPMColor src, uint16_t dst) { |
| SkASSERT(require_255(src)); |
| return dst; |
| } |
| |
| static uint16_t dstout_modeproc16_0(SkPMColor src, uint16_t dst) { |
| SkASSERT(require_0(src)); |
| return dst; |
| } |
| |
| static uint16_t srcatop_modeproc16(SkPMColor src, uint16_t dst) { |
| unsigned isa = 255 - SkGetPackedA32(src); |
| |
| return SkPackRGB16( |
| SkPacked32ToR16(src) + SkAlphaMulAlpha(SkGetPackedR16(dst), isa), |
| SkPacked32ToG16(src) + SkAlphaMulAlpha(SkGetPackedG16(dst), isa), |
| SkPacked32ToB16(src) + SkAlphaMulAlpha(SkGetPackedB16(dst), isa)); |
| } |
| |
| static uint16_t srcatop_modeproc16_0(SkPMColor src, uint16_t dst) { |
| SkASSERT(require_0(src)); |
| return dst; |
| } |
| |
| static uint16_t srcatop_modeproc16_255(SkPMColor src, uint16_t dst) { |
| SkASSERT(require_255(src)); |
| return SkPixel32ToPixel16(src); |
| } |
| |
| static uint16_t dstatop_modeproc16_255(SkPMColor src, uint16_t dst) { |
| SkASSERT(require_255(src)); |
| return dst; |
| } |
| |
| /********* |
| darken and lighten boil down to this. |
| |
| darken = (1 - Sa) * Dc + min(Sc, Dc) |
| lighten = (1 - Sa) * Dc + max(Sc, Dc) |
| |
| if (Sa == 0) these become |
| darken = Dc + min(0, Dc) = 0 |
| lighten = Dc + max(0, Dc) = Dc |
| |
| if (Sa == 1) these become |
| darken = min(Sc, Dc) |
| lighten = max(Sc, Dc) |
| */ |
| |
| static uint16_t darken_modeproc16_0(SkPMColor src, uint16_t dst) { |
| SkASSERT(require_0(src)); |
| return 0; |
| } |
| |
| static uint16_t darken_modeproc16_255(SkPMColor src, uint16_t dst) { |
| SkASSERT(require_255(src)); |
| unsigned r = SkFastMin32(SkPacked32ToR16(src), SkGetPackedR16(dst)); |
| unsigned g = SkFastMin32(SkPacked32ToG16(src), SkGetPackedG16(dst)); |
| unsigned b = SkFastMin32(SkPacked32ToB16(src), SkGetPackedB16(dst)); |
| return SkPackRGB16(r, g, b); |
| } |
| |
| static uint16_t lighten_modeproc16_0(SkPMColor src, uint16_t dst) { |
| SkASSERT(require_0(src)); |
| return dst; |
| } |
| |
| static uint16_t lighten_modeproc16_255(SkPMColor src, uint16_t dst) { |
| SkASSERT(require_255(src)); |
| unsigned r = SkMax32(SkPacked32ToR16(src), SkGetPackedR16(dst)); |
| unsigned g = SkMax32(SkPacked32ToG16(src), SkGetPackedG16(dst)); |
| unsigned b = SkMax32(SkPacked32ToB16(src), SkGetPackedB16(dst)); |
| return SkPackRGB16(r, g, b); |
| } |
| |
| struct Proc16Rec { |
| SkXfermodeProc16 fProc16_0; |
| SkXfermodeProc16 fProc16_255; |
| SkXfermodeProc16 fProc16_General; |
| }; |
| |
| static const Proc16Rec gModeProcs16[] = { |
| { NULL, NULL, NULL }, // CLEAR |
| { NULL, src_modeproc16_255, NULL }, |
| { dst_modeproc16, dst_modeproc16, dst_modeproc16 }, |
| { srcover_modeproc16_0, srcover_modeproc16_255, NULL }, |
| { dstover_modeproc16_0, dstover_modeproc16_255, NULL }, |
| { NULL, srcin_modeproc16_255, NULL }, |
| { NULL, dstin_modeproc16_255, NULL }, |
| { NULL, NULL, NULL },// SRC_OUT |
| { dstout_modeproc16_0, NULL, NULL }, |
| { srcatop_modeproc16_0, srcatop_modeproc16_255, srcatop_modeproc16 }, |
| { NULL, dstatop_modeproc16_255, NULL }, |
| { NULL, NULL, NULL }, // XOR |
| |
| { NULL, NULL, NULL }, // plus |
| { NULL, NULL, NULL }, // modulate |
| { NULL, NULL, NULL }, // screen |
| { NULL, NULL, NULL }, // overlay |
| { darken_modeproc16_0, darken_modeproc16_255, NULL }, // darken |
| { lighten_modeproc16_0, lighten_modeproc16_255, NULL }, // lighten |
| { NULL, NULL, NULL }, // colordodge |
| { NULL, NULL, NULL }, // colorburn |
| { NULL, NULL, NULL }, // hardlight |
| { NULL, NULL, NULL }, // softlight |
| { NULL, NULL, NULL }, // difference |
| { NULL, NULL, NULL }, // exclusion |
| }; |
| |
| SkXfermodeProc16 SkXfermode::GetProc16(Mode mode, SkColor srcColor) { |
| SkXfermodeProc16 proc16 = NULL; |
| if ((unsigned)mode < kModeCount) { |
| const Proc16Rec& rec = gModeProcs16[mode]; |
| unsigned a = SkColorGetA(srcColor); |
| |
| if (0 == a) { |
| proc16 = rec.fProc16_0; |
| } else if (255 == a) { |
| proc16 = rec.fProc16_255; |
| } else { |
| proc16 = rec.fProc16_General; |
| } |
| } |
| return proc16; |
| } |
| |
| SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkXfermode) |
| SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkProcCoeffXfermode) |
| SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkClearXfermode) |
| SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkSrcXfermode) |
| SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkDstInXfermode) |
| SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkDstOutXfermode) |
| SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END |
