| |
| /* |
| * 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 "SkXfermode_proccoeff.h" |
| #include "SkColorPriv.h" |
| #include "SkFlattenableBuffers.h" |
| #include "SkMathPriv.h" |
| #include "SkString.h" |
| #include "SkUtilsArm.h" |
| |
| #if !SK_ARM_NEON_IS_NONE |
| #include "SkXfermode_opts_arm_neon.h" |
| #endif |
| |
| 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); |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| // 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); |
| } |
| |
| static inline int srcover_byte(int a, int b) { |
| return a + b - SkAlphaMulAlpha(a, b); |
| } |
| |
| // kMultiply_Mode |
| // B(Cb, Cs) = Cb x Cs |
| // multiply uses its own version of blendfunc_byte because sa and da are not needed |
| static int blendfunc_multiply_byte(int sc, int dc, int sa, int da) { |
| return clamp_div255round(sc * (255 - da) + dc * (255 - sa) + sc * dc); |
| } |
| |
| static SkPMColor multiply_modeproc(SkPMColor src, SkPMColor dst) { |
| int sa = SkGetPackedA32(src); |
| int da = SkGetPackedA32(dst); |
| int a = srcover_byte(sa, da); |
| int r = blendfunc_multiply_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); |
| int g = blendfunc_multiply_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); |
| int b = blendfunc_multiply_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); |
| return SkPackARGB32(a, r, g, b); |
| } |
| |
| // kScreen_Mode |
| 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 == dc) { |
| return SkAlphaMulAlpha(sc, 255 - da); |
| } else if (0 == diff) { |
| rc = sa * da + sc * (255 - da) + dc * (255 - sa); |
| } else { |
| diff = dc * sa / diff; |
| rc = sa * ((da < diff) ? da : diff) + sc * (255 - da) + dc * (255 - sa); |
| } |
| return clamp_div255round(rc); |
| } |
| static SkPMColor colordodge_modeproc(SkPMColor src, SkPMColor dst) { |
| 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); |
| 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) { |
| rc = sa * da + sc * (255 - da) + dc * (255 - sa); |
| } else if (0 == sc) { |
| return SkAlphaMulAlpha(dc, 255 - sa); |
| } else { |
| int tmp = (da - dc) * sa / sc; |
| rc = sa * (da - ((da < tmp) ? da : tmp)) |
| + sc * (255 - da) + dc * (255 - sa); |
| } |
| return clamp_div255round(rc); |
| } |
| static SkPMColor colorburn_modeproc(SkPMColor src, SkPMColor dst) { |
| 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, int) { |
| // 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); |
| |
| // The above equation can be simplified as follows |
| int r = 255*(sc + dc) - 2 * sc * dc; |
| 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); |
| } |
| |
| // The CSS compositing spec introduces the following formulas: |
| // (See https://dvcs.w3.org/hg/FXTF/rawfile/tip/compositing/index.html#blendingnonseparable) |
| // SkComputeLuminance is similar to this formula but it uses the new definition from Rec. 709 |
| // while PDF and CG uses the one from Rec. Rec. 601 |
| // See http://www.glennchan.info/articles/technical/hd-versus-sd-color-space/hd-versus-sd-color-space.htm |
| static inline int Lum(int r, int g, int b) |
| { |
| return SkDiv255Round(r * 77 + g * 150 + b * 28); |
| } |
| |
| static inline int min2(int a, int b) { return a < b ? a : b; } |
| static inline int max2(int a, int b) { return a > b ? a : b; } |
| #define minimum(a, b, c) min2(min2(a, b), c) |
| #define maximum(a, b, c) max2(max2(a, b), c) |
| |
| static inline int Sat(int r, int g, int b) { |
| return maximum(r, g, b) - minimum(r, g, b); |
| } |
| |
| static inline void setSaturationComponents(int* Cmin, int* Cmid, int* Cmax, int s) { |
| if(*Cmax > *Cmin) { |
| *Cmid = SkMulDiv(*Cmid - *Cmin, s, *Cmax - *Cmin); |
| *Cmax = s; |
| } else { |
| *Cmax = 0; |
| *Cmid = 0; |
| } |
| |
| *Cmin = 0; |
| } |
| |
| static inline void SetSat(int* r, int* g, int* b, int s) { |
| if(*r <= *g) { |
| if(*g <= *b) { |
| setSaturationComponents(r, g, b, s); |
| } else if(*r <= *b) { |
| setSaturationComponents(r, b, g, s); |
| } else { |
| setSaturationComponents(b, r, g, s); |
| } |
| } else if(*r <= *b) { |
| setSaturationComponents(g, r, b, s); |
| } else if(*g <= *b) { |
| setSaturationComponents(g, b, r, s); |
| } else { |
| setSaturationComponents(b, g, r, s); |
| } |
| } |
| |
| static inline void clipColor(int* r, int* g, int* b, int a) { |
| int L = Lum(*r, *g, *b); |
| int n = minimum(*r, *g, *b); |
| int x = maximum(*r, *g, *b); |
| if(n < 0) { |
| *r = L + SkMulDiv(*r - L, L, L - n); |
| *g = L + SkMulDiv(*g - L, L, L - n); |
| *b = L + SkMulDiv(*b - L, L, L - n); |
| } |
| |
| if (x > a) { |
| *r = L + SkMulDiv(*r - L, a - L, x - L); |
| *g = L + SkMulDiv(*g - L, a - L, x - L); |
| *b = L + SkMulDiv(*b - L, a - L, x - L); |
| } |
| } |
| |
| static inline void SetLum(int* r, int* g, int* b, int a, int l) { |
| int d = l - Lum(*r, *g, *b); |
| *r += d; |
| *g += d; |
| *b += d; |
| |
| clipColor(r, g, b, a); |
| } |
| |
| // non-separable blend modes are done in non-premultiplied alpha |
| #define blendfunc_nonsep_byte(sc, dc, sa, da, blendval) \ |
| clamp_div255round(sc * (255 - da) + dc * (255 - sa) + blendval) |
| |
| // kHue_Mode |
| // B(Cb, Cs) = SetLum(SetSat(Cs, Sat(Cb)), Lum(Cb)) |
| // Create a color with the hue of the source color and the saturation and luminosity of the backdrop color. |
| static SkPMColor hue_modeproc(SkPMColor src, SkPMColor dst) { |
| int sr = SkGetPackedR32(src); |
| int sg = SkGetPackedG32(src); |
| int sb = SkGetPackedB32(src); |
| int sa = SkGetPackedA32(src); |
| |
| int dr = SkGetPackedR32(dst); |
| int dg = SkGetPackedG32(dst); |
| int db = SkGetPackedB32(dst); |
| int da = SkGetPackedA32(dst); |
| int Sr, Sg, Sb; |
| |
| if(sa && da) { |
| Sr = sr * sa; |
| Sg = sg * sa; |
| Sb = sb * sa; |
| SetSat(&Sr, &Sg, &Sb, Sat(dr, dg, db) * sa); |
| SetLum(&Sr, &Sg, &Sb, sa * da, Lum(dr, dg, db) * sa); |
| } else { |
| Sr = 0; |
| Sg = 0; |
| Sb = 0; |
| } |
| |
| int a = srcover_byte(sa, da); |
| int r = blendfunc_nonsep_byte(sr, dr, sa, da, Sr); |
| int g = blendfunc_nonsep_byte(sg, dg, sa, da, Sg); |
| int b = blendfunc_nonsep_byte(sb, db, sa, da, Sb); |
| return SkPackARGB32(a, r, g, b); |
| } |
| |
| // kSaturation_Mode |
| // B(Cb, Cs) = SetLum(SetSat(Cb, Sat(Cs)), Lum(Cb)) |
| // Create a color with the saturation of the source color and the hue and luminosity of the backdrop color. |
| static SkPMColor saturation_modeproc(SkPMColor src, SkPMColor dst) { |
| int sr = SkGetPackedR32(src); |
| int sg = SkGetPackedG32(src); |
| int sb = SkGetPackedB32(src); |
| int sa = SkGetPackedA32(src); |
| |
| int dr = SkGetPackedR32(dst); |
| int dg = SkGetPackedG32(dst); |
| int db = SkGetPackedB32(dst); |
| int da = SkGetPackedA32(dst); |
| int Dr, Dg, Db; |
| |
| if(sa && da) { |
| Dr = dr * sa; |
| Dg = dg * sa; |
| Db = db * sa; |
| SetSat(&Dr, &Dg, &Db, Sat(sr, sg, sb) * da); |
| SetLum(&Dr, &Dg, &Db, sa * da, Lum(dr, dg, db) * sa); |
| } else { |
| Dr = 0; |
| Dg = 0; |
| Db = 0; |
| } |
| |
| int a = srcover_byte(sa, da); |
| int r = blendfunc_nonsep_byte(sr, dr, sa, da, Dr); |
| int g = blendfunc_nonsep_byte(sg, dg, sa, da, Dg); |
| int b = blendfunc_nonsep_byte(sb, db, sa, da, Db); |
| return SkPackARGB32(a, r, g, b); |
| } |
| |
| // kColor_Mode |
| // B(Cb, Cs) = SetLum(Cs, Lum(Cb)) |
| // Create a color with the hue and saturation of the source color and the luminosity of the backdrop color. |
| static SkPMColor color_modeproc(SkPMColor src, SkPMColor dst) { |
| int sr = SkGetPackedR32(src); |
| int sg = SkGetPackedG32(src); |
| int sb = SkGetPackedB32(src); |
| int sa = SkGetPackedA32(src); |
| |
| int dr = SkGetPackedR32(dst); |
| int dg = SkGetPackedG32(dst); |
| int db = SkGetPackedB32(dst); |
| int da = SkGetPackedA32(dst); |
| int Sr, Sg, Sb; |
| |
| if(sa && da) { |
| Sr = sr * da; |
| Sg = sg * da; |
| Sb = sb * da; |
| SetLum(&Sr, &Sg, &Sb, sa * da, Lum(dr, dg, db) * sa); |
| } else { |
| Sr = 0; |
| Sg = 0; |
| Sb = 0; |
| } |
| |
| int a = srcover_byte(sa, da); |
| int r = blendfunc_nonsep_byte(sr, dr, sa, da, Sr); |
| int g = blendfunc_nonsep_byte(sg, dg, sa, da, Sg); |
| int b = blendfunc_nonsep_byte(sb, db, sa, da, Sb); |
| return SkPackARGB32(a, r, g, b); |
| } |
| |
| // kLuminosity_Mode |
| // B(Cb, Cs) = SetLum(Cb, Lum(Cs)) |
| // Create a color with the luminosity of the source color and the hue and saturation of the backdrop color. |
| static SkPMColor luminosity_modeproc(SkPMColor src, SkPMColor dst) { |
| int sr = SkGetPackedR32(src); |
| int sg = SkGetPackedG32(src); |
| int sb = SkGetPackedB32(src); |
| int sa = SkGetPackedA32(src); |
| |
| int dr = SkGetPackedR32(dst); |
| int dg = SkGetPackedG32(dst); |
| int db = SkGetPackedB32(dst); |
| int da = SkGetPackedA32(dst); |
| int Dr, Dg, Db; |
| |
| if(sa && da) { |
| Dr = dr * sa; |
| Dg = dg * sa; |
| Db = db * sa; |
| SetLum(&Dr, &Dg, &Db, sa * da, Lum(sr, sg, sb) * da); |
| } else { |
| Dr = 0; |
| Dg = 0; |
| Db = 0; |
| } |
| |
| int a = srcover_byte(sa, da); |
| int r = blendfunc_nonsep_byte(sr, dr, sa, da, Dr); |
| int g = blendfunc_nonsep_byte(sg, dg, sa, da, Dg); |
| int b = blendfunc_nonsep_byte(sb, db, sa, da, Db); |
| return SkPackARGB32(a, r, g, b); |
| } |
| |
| 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, SkXfermode::kOne_Coeff, SkXfermode::kISC_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 }, |
| { multiply_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| { hue_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| { saturation_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| { color_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, |
| { luminosity_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; |
| } |
| |
| bool SkXfermode::asNewEffectOrCoeff(GrContext*, GrEffectRef**, Coeff* src, Coeff* dst, GrTexture*) const { |
| return this->asCoeff(src, dst); |
| } |
| |
| bool SkXfermode::AsNewEffectOrCoeff(SkXfermode* xfermode, |
| GrContext* context, |
| GrEffectRef** effect, |
| Coeff* src, |
| Coeff* dst, |
| GrTexture* background) { |
| if (NULL == xfermode) { |
| return ModeAsCoeff(kSrcOver_Mode, src, dst); |
| } else { |
| return xfermode->asNewEffectOrCoeff(context, effect, src, dst, background); |
| } |
| } |
| |
| 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::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::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 |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| #if SK_SUPPORT_GPU |
| |
| #include "GrEffect.h" |
| #include "GrCoordTransform.h" |
| #include "GrEffectUnitTest.h" |
| #include "GrTBackendEffectFactory.h" |
| #include "gl/GrGLEffect.h" |
| |
| /** |
| * GrEffect that implements the all the separable xfer modes that cannot be expressed as Coeffs. |
| */ |
| class XferEffect : public GrEffect { |
| public: |
| static bool IsSupportedMode(SkXfermode::Mode mode) { |
| return mode > SkXfermode::kLastCoeffMode && mode <= SkXfermode::kLastMode; |
| } |
| |
| static GrEffectRef* Create(SkXfermode::Mode mode, GrTexture* background) { |
| if (!IsSupportedMode(mode)) { |
| return NULL; |
| } else { |
| AutoEffectUnref effect(SkNEW_ARGS(XferEffect, (mode, background))); |
| return CreateEffectRef(effect); |
| } |
| } |
| |
| virtual void getConstantColorComponents(GrColor* color, |
| uint32_t* validFlags) const SK_OVERRIDE { |
| *validFlags = 0; |
| } |
| |
| virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE { |
| return GrTBackendEffectFactory<XferEffect>::getInstance(); |
| } |
| |
| static const char* Name() { return "XferEffect"; } |
| |
| SkXfermode::Mode mode() const { return fMode; } |
| const GrTextureAccess& backgroundAccess() const { return fBackgroundAccess; } |
| |
| class GLEffect : public GrGLEffect { |
| public: |
| GLEffect(const GrBackendEffectFactory& factory, const GrDrawEffect&) |
| : GrGLEffect(factory) { |
| } |
| virtual void emitCode(GrGLShaderBuilder* builder, |
| const GrDrawEffect& drawEffect, |
| EffectKey key, |
| const char* outputColor, |
| const char* inputColor, |
| const TransformedCoordsArray& coords, |
| const TextureSamplerArray& samplers) SK_OVERRIDE { |
| SkXfermode::Mode mode = drawEffect.castEffect<XferEffect>().mode(); |
| const GrTexture* backgroundTex = drawEffect.castEffect<XferEffect>().backgroundAccess().getTexture(); |
| const char* dstColor; |
| if (backgroundTex) { |
| dstColor = "bgColor"; |
| builder->fsCodeAppendf("\t\tvec4 %s = ", dstColor); |
| builder->fsAppendTextureLookup(samplers[0], coords[0].c_str(), coords[0].type()); |
| builder->fsCodeAppendf(";\n"); |
| } else { |
| dstColor = builder->dstColor(); |
| } |
| SkASSERT(NULL != dstColor); |
| |
| // We don't try to optimize for this case at all |
| if (NULL == inputColor) { |
| builder->fsCodeAppendf("\t\tconst vec4 ones = vec4(1);\n"); |
| inputColor = "ones"; |
| } |
| builder->fsCodeAppendf("\t\t// SkXfermode::Mode: %s\n", SkXfermode::ModeName(mode)); |
| |
| // These all perform src-over on the alpha channel. |
| builder->fsCodeAppendf("\t\t%s.a = %s.a + (1.0 - %s.a) * %s.a;\n", |
| outputColor, inputColor, inputColor, dstColor); |
| |
| switch (mode) { |
| case SkXfermode::kOverlay_Mode: |
| // Overlay is Hard-Light with the src and dst reversed |
| HardLight(builder, outputColor, dstColor, inputColor); |
| break; |
| case SkXfermode::kDarken_Mode: |
| builder->fsCodeAppendf("\t\t%s.rgb = min((1.0 - %s.a) * %s.rgb + %s.rgb, " |
| "(1.0 - %s.a) * %s.rgb + %s.rgb);\n", |
| outputColor, |
| inputColor, dstColor, inputColor, |
| dstColor, inputColor, dstColor); |
| break; |
| case SkXfermode::kLighten_Mode: |
| builder->fsCodeAppendf("\t\t%s.rgb = max((1.0 - %s.a) * %s.rgb + %s.rgb, " |
| "(1.0 - %s.a) * %s.rgb + %s.rgb);\n", |
| outputColor, |
| inputColor, dstColor, inputColor, |
| dstColor, inputColor, dstColor); |
| break; |
| case SkXfermode::kColorDodge_Mode: |
| ColorDodgeComponent(builder, outputColor, inputColor, dstColor, 'r'); |
| ColorDodgeComponent(builder, outputColor, inputColor, dstColor, 'g'); |
| ColorDodgeComponent(builder, outputColor, inputColor, dstColor, 'b'); |
| break; |
| case SkXfermode::kColorBurn_Mode: |
| ColorBurnComponent(builder, outputColor, inputColor, dstColor, 'r'); |
| ColorBurnComponent(builder, outputColor, inputColor, dstColor, 'g'); |
| ColorBurnComponent(builder, outputColor, inputColor, dstColor, 'b'); |
| break; |
| case SkXfermode::kHardLight_Mode: |
| HardLight(builder, outputColor, inputColor, dstColor); |
| break; |
| case SkXfermode::kSoftLight_Mode: |
| builder->fsCodeAppendf("\t\tif (0.0 == %s.a) {\n", dstColor); |
| builder->fsCodeAppendf("\t\t\t%s.rgba = %s;\n", outputColor, inputColor); |
| builder->fsCodeAppendf("\t\t} else {\n"); |
| SoftLightComponentPosDstAlpha(builder, outputColor, inputColor, dstColor, 'r'); |
| SoftLightComponentPosDstAlpha(builder, outputColor, inputColor, dstColor, 'g'); |
| SoftLightComponentPosDstAlpha(builder, outputColor, inputColor, dstColor, 'b'); |
| builder->fsCodeAppendf("\t\t}\n"); |
| break; |
| case SkXfermode::kDifference_Mode: |
| builder->fsCodeAppendf("\t\t%s.rgb = %s.rgb + %s.rgb -" |
| "2.0 * min(%s.rgb * %s.a, %s.rgb * %s.a);\n", |
| outputColor, inputColor, dstColor, inputColor, dstColor, |
| dstColor, inputColor); |
| break; |
| case SkXfermode::kExclusion_Mode: |
| builder->fsCodeAppendf("\t\t%s.rgb = %s.rgb + %s.rgb - " |
| "2.0 * %s.rgb * %s.rgb;\n", |
| outputColor, dstColor, inputColor, dstColor, inputColor); |
| break; |
| case SkXfermode::kMultiply_Mode: |
| builder->fsCodeAppendf("\t\t%s.rgb = (1.0 - %s.a) * %s.rgb + " |
| "(1.0 - %s.a) * %s.rgb + " |
| "%s.rgb * %s.rgb;\n", |
| outputColor, inputColor, dstColor, dstColor, inputColor, |
| inputColor, dstColor); |
| break; |
| case SkXfermode::kHue_Mode: { |
| // SetLum(SetSat(S * Da, Sat(D * Sa)), Sa*Da, D*Sa) + (1 - Sa) * D + (1 - Da) * S |
| SkString setSat, setLum; |
| AddSatFunction(builder, &setSat); |
| AddLumFunction(builder, &setLum); |
| builder->fsCodeAppendf("\t\tvec4 dstSrcAlpha = %s * %s.a;\n", |
| dstColor, inputColor); |
| builder->fsCodeAppendf("\t\t%s.rgb = %s(%s(%s.rgb * %s.a, dstSrcAlpha.rgb), dstSrcAlpha.a, dstSrcAlpha.rgb);\n", |
| outputColor, setLum.c_str(), setSat.c_str(), inputColor, |
| dstColor); |
| builder->fsCodeAppendf("\t\t%s.rgb += (1.0 - %s.a) * %s.rgb + (1.0 - %s.a) * %s.rgb;\n", |
| outputColor, inputColor, dstColor, dstColor, inputColor); |
| break; |
| } |
| case SkXfermode::kSaturation_Mode: { |
| // SetLum(SetSat(D * Sa, Sat(S * Da)), Sa*Da, D*Sa)) + (1 - Sa) * D + (1 - Da) * S |
| SkString setSat, setLum; |
| AddSatFunction(builder, &setSat); |
| AddLumFunction(builder, &setLum); |
| builder->fsCodeAppendf("\t\tvec4 dstSrcAlpha = %s * %s.a;\n", |
| dstColor, inputColor); |
| builder->fsCodeAppendf("\t\t%s.rgb = %s(%s(dstSrcAlpha.rgb, %s.rgb * %s.a), dstSrcAlpha.a, dstSrcAlpha.rgb);\n", |
| outputColor, setLum.c_str(), setSat.c_str(), inputColor, |
| dstColor); |
| builder->fsCodeAppendf("\t\t%s.rgb += (1.0 - %s.a) * %s.rgb + (1.0 - %s.a) * %s.rgb;\n", |
| outputColor, inputColor, dstColor, dstColor, inputColor); |
| break; |
| } |
| case SkXfermode::kColor_Mode: { |
| // SetLum(S * Da, Sa* Da, D * Sa) + (1 - Sa) * D + (1 - Da) * S |
| SkString setLum; |
| AddLumFunction(builder, &setLum); |
| builder->fsCodeAppendf("\t\tvec4 srcDstAlpha = %s * %s.a;\n", |
| inputColor, dstColor); |
| builder->fsCodeAppendf("\t\t%s.rgb = %s(srcDstAlpha.rgb, srcDstAlpha.a, %s.rgb * %s.a);\n", |
| outputColor, setLum.c_str(), dstColor, inputColor); |
| builder->fsCodeAppendf("\t\t%s.rgb += (1.0 - %s.a) * %s.rgb + (1.0 - %s.a) * %s.rgb;\n", |
| outputColor, inputColor, dstColor, dstColor, inputColor); |
| break; |
| } |
| case SkXfermode::kLuminosity_Mode: { |
| // SetLum(D * Sa, Sa* Da, S * Da) + (1 - Sa) * D + (1 - Da) * S |
| SkString setLum; |
| AddLumFunction(builder, &setLum); |
| builder->fsCodeAppendf("\t\tvec4 srcDstAlpha = %s * %s.a;\n", |
| inputColor, dstColor); |
| builder->fsCodeAppendf("\t\t%s.rgb = %s(%s.rgb * %s.a, srcDstAlpha.a, srcDstAlpha.rgb);\n", |
| outputColor, setLum.c_str(), dstColor, inputColor); |
| builder->fsCodeAppendf("\t\t%s.rgb += (1.0 - %s.a) * %s.rgb + (1.0 - %s.a) * %s.rgb;\n", |
| outputColor, inputColor, dstColor, dstColor, inputColor); |
| break; |
| } |
| default: |
| GrCrash("Unknown XferEffect mode."); |
| break; |
| } |
| } |
| |
| static inline EffectKey GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&) { |
| return drawEffect.castEffect<XferEffect>().mode(); |
| } |
| |
| private: |
| static void HardLight(GrGLShaderBuilder* builder, |
| const char* final, |
| const char* src, |
| const char* dst) { |
| static const char kComponents[] = {'r', 'g', 'b'}; |
| for (size_t i = 0; i < SK_ARRAY_COUNT(kComponents); ++i) { |
| char component = kComponents[i]; |
| builder->fsCodeAppendf("\t\tif (2.0 * %s.%c <= %s.a) {\n", src, component, src); |
| builder->fsCodeAppendf("\t\t\t%s.%c = 2.0 * %s.%c * %s.%c;\n", final, component, src, component, dst, component); |
| builder->fsCodeAppend("\t\t} else {\n"); |
| builder->fsCodeAppendf("\t\t\t%s.%c = %s.a * %s.a - 2.0 * (%s.a - %s.%c) * (%s.a - %s.%c);\n", |
| final, component, src, dst, dst, dst, component, src, src, component); |
| builder->fsCodeAppend("\t\t}\n"); |
| } |
| builder->fsCodeAppendf("\t\t%s.rgb += %s.rgb * (1.0 - %s.a) + %s.rgb * (1.0 - %s.a);\n", |
| final, src, dst, dst, src); |
| } |
| |
| // Does one component of color-dodge |
| static void ColorDodgeComponent(GrGLShaderBuilder* builder, |
| const char* final, |
| const char* src, |
| const char* dst, |
| const char component) { |
| builder->fsCodeAppendf("\t\tif (0.0 == %s.%c) {\n", dst, component); |
| builder->fsCodeAppendf("\t\t\t%s.%c = %s.%c * (1.0 - %s.a);\n", |
| final, component, src, component, dst); |
| builder->fsCodeAppend("\t\t} else {\n"); |
| builder->fsCodeAppendf("\t\t\tfloat d = %s.a - %s.%c;\n", src, src, component); |
| builder->fsCodeAppend("\t\t\tif (0.0 == d) {\n"); |
| builder->fsCodeAppendf("\t\t\t\t%s.%c = %s.a * %s.a + %s.%c * (1.0 - %s.a) + %s.%c * (1.0 - %s.a);\n", |
| final, component, src, dst, src, component, dst, dst, component, |
| src); |
| builder->fsCodeAppend("\t\t\t} else {\n"); |
| builder->fsCodeAppendf("\t\t\t\td = min(%s.a, %s.%c * %s.a / d);\n", |
| dst, dst, component, src); |
| builder->fsCodeAppendf("\t\t\t\t%s.%c = d * %s.a + %s.%c * (1.0 - %s.a) + %s.%c * (1.0 - %s.a);\n", |
| final, component, src, src, component, dst, dst, component, src); |
| builder->fsCodeAppend("\t\t\t}\n"); |
| builder->fsCodeAppend("\t\t}\n"); |
| } |
| |
| // Does one component of color-burn |
| static void ColorBurnComponent(GrGLShaderBuilder* builder, |
| const char* final, |
| const char* src, |
| const char* dst, |
| const char component) { |
| builder->fsCodeAppendf("\t\tif (%s.a == %s.%c) {\n", dst, dst, component); |
| builder->fsCodeAppendf("\t\t\t%s.%c = %s.a * %s.a + %s.%c * (1.0 - %s.a) + %s.%c * (1.0 - %s.a);\n", |
| final, component, src, dst, src, component, dst, dst, component, |
| src); |
| builder->fsCodeAppendf("\t\t} else if (0.0 == %s.%c) {\n", src, component); |
| builder->fsCodeAppendf("\t\t\t%s.%c = %s.%c * (1.0 - %s.a);\n", |
| final, component, dst, component, src); |
| builder->fsCodeAppend("\t\t} else {\n"); |
| builder->fsCodeAppendf("\t\t\tfloat d = max(0.0, %s.a - (%s.a - %s.%c) * %s.a / %s.%c);\n", |
| dst, dst, dst, component, src, src, component); |
| builder->fsCodeAppendf("\t\t\t%s.%c = %s.a * d + %s.%c * (1.0 - %s.a) + %s.%c * (1.0 - %s.a);\n", |
| final, component, src, src, component, dst, dst, component, src); |
| builder->fsCodeAppend("\t\t}\n"); |
| } |
| |
| // Does one component of soft-light. Caller should have already checked that dst alpha > 0. |
| static void SoftLightComponentPosDstAlpha(GrGLShaderBuilder* builder, |
| const char* final, |
| const char* src, |
| const char* dst, |
| const char component) { |
| // if (2S < Sa) |
| builder->fsCodeAppendf("\t\t\tif (2.0 * %s.%c <= %s.a) {\n", src, component, src); |
| // (D^2 (Sa-2 S))/Da+(1-Da) S+D (-Sa+2 S+1) |
| builder->fsCodeAppendf("\t\t\t\t%s.%c = (%s.%c*%s.%c*(%s.a - 2.0*%s.%c)) / %s.a + (1.0 - %s.a) * %s.%c + %s.%c*(-%s.a + 2.0*%s.%c + 1.0);\n", |
| final, component, dst, component, dst, component, src, src, |
| component, dst, dst, src, component, dst, component, src, src, |
| component); |
| // else if (4D < Da) |
| builder->fsCodeAppendf("\t\t\t} else if (4.0 * %s.%c <= %s.a) {\n", |
| dst, component, dst); |
| builder->fsCodeAppendf("\t\t\t\tfloat DSqd = %s.%c * %s.%c;\n", |
| dst, component, dst, component); |
| builder->fsCodeAppendf("\t\t\t\tfloat DCub = DSqd * %s.%c;\n", dst, component); |
| builder->fsCodeAppendf("\t\t\t\tfloat DaSqd = %s.a * %s.a;\n", dst, dst); |
| builder->fsCodeAppendf("\t\t\t\tfloat DaCub = DaSqd * %s.a;\n", dst); |
| // (Da^3 (-S)+Da^2 (S-D (3 Sa-6 S-1))+12 Da D^2 (Sa-2 S)-16 D^3 (Sa-2 S))/Da^2 |
| builder->fsCodeAppendf("\t\t\t\t%s.%c = (-DaCub*%s.%c + DaSqd*(%s.%c - %s.%c * (3.0*%s.a - 6.0*%s.%c - 1.0)) + 12.0*%s.a*DSqd*(%s.a - 2.0*%s.%c) - 16.0*DCub * (%s.a - 2.0*%s.%c)) / DaSqd;\n", |
| final, component, src, component, src, component, dst, component, |
| src, src, component, dst, src, src, component, src, src, |
| component); |
| builder->fsCodeAppendf("\t\t\t} else {\n"); |
| // -sqrt(Da * D) (Sa-2 S)-Da S+D (Sa-2 S+1)+S |
| builder->fsCodeAppendf("\t\t\t\t%s.%c = -sqrt(%s.a*%s.%c)*(%s.a - 2.0*%s.%c) - %s.a*%s.%c + %s.%c*(%s.a - 2.0*%s.%c + 1.0) + %s.%c;\n", |
| final, component, dst, dst, component, src, src, component, dst, |
| src, component, dst, component, src, src, component, src, |
| component); |
| builder->fsCodeAppendf("\t\t\t}\n"); |
| } |
| |
| // Adds a function that takes two colors and an alpha as input. It produces a color with the |
| // hue and saturation of the first color, the luminosity of the second color, and the input |
| // alpha. It has this signature: |
| // vec3 set_luminance(vec3 hueSatColor, float alpha, vec3 lumColor). |
| static void AddLumFunction(GrGLShaderBuilder* builder, SkString* setLumFunction) { |
| // Emit a helper that gets the luminance of a color. |
| SkString getFunction; |
| GrGLShaderVar getLumArgs[] = { |
| GrGLShaderVar("color", kVec3f_GrSLType), |
| }; |
| SkString getLumBody("\treturn dot(vec3(0.3, 0.59, 0.11), color);\n"); |
| builder->fsEmitFunction(kFloat_GrSLType, |
| "luminance", |
| SK_ARRAY_COUNT(getLumArgs), getLumArgs, |
| getLumBody.c_str(), |
| &getFunction); |
| |
| // Emit the set luminance function. |
| GrGLShaderVar setLumArgs[] = { |
| GrGLShaderVar("hueSat", kVec3f_GrSLType), |
| GrGLShaderVar("alpha", kFloat_GrSLType), |
| GrGLShaderVar("lumColor", kVec3f_GrSLType), |
| }; |
| SkString setLumBody; |
| setLumBody.printf("\tfloat diff = %s(lumColor - hueSat);\n", getFunction.c_str()); |
| setLumBody.append("\tvec3 outColor = hueSat + diff;\n"); |
| setLumBody.appendf("\tfloat outLum = %s(outColor);\n", getFunction.c_str()); |
| setLumBody.append("\tfloat minComp = min(min(outColor.r, outColor.g), outColor.b);\n" |
| "\tfloat maxComp = max(max(outColor.r, outColor.g), outColor.b);\n" |
| "\tif (minComp < 0.0) {\n" |
| "\t\toutColor = outLum + ((outColor - vec3(outLum, outLum, outLum)) * outLum) / (outLum - minComp);\n" |
| "\t}\n" |
| "\tif (maxComp > alpha) {\n" |
| "\t\toutColor = outLum + ((outColor - vec3(outLum, outLum, outLum)) * (alpha - outLum)) / (maxComp - outLum);\n" |
| "\t}\n" |
| "\treturn outColor;\n"); |
| builder->fsEmitFunction(kVec3f_GrSLType, |
| "set_luminance", |
| SK_ARRAY_COUNT(setLumArgs), setLumArgs, |
| setLumBody.c_str(), |
| setLumFunction); |
| } |
| |
| // Adds a function that creates a color with the hue and luminosity of one input color and |
| // the saturation of another color. It will have this signature: |
| // float set_saturation(vec3 hueLumColor, vec3 satColor) |
| static void AddSatFunction(GrGLShaderBuilder* builder, SkString* setSatFunction) { |
| // Emit a helper that gets the saturation of a color |
| SkString getFunction; |
| GrGLShaderVar getSatArgs[] = { GrGLShaderVar("color", kVec3f_GrSLType) }; |
| SkString getSatBody; |
| getSatBody.printf("\treturn max(max(color.r, color.g), color.b) - " |
| "min(min(color.r, color.g), color.b);\n"); |
| builder->fsEmitFunction(kFloat_GrSLType, |
| "saturation", |
| SK_ARRAY_COUNT(getSatArgs), getSatArgs, |
| getSatBody.c_str(), |
| &getFunction); |
| |
| // Emit a helper that sets the saturation given sorted input channels. This used |
| // to use inout params for min, mid, and max components but that seems to cause |
| // problems on PowerVR drivers. So instead it returns a vec3 where r, g ,b are the |
| // adjusted min, mid, and max inputs, respectively. |
| SkString helperFunction; |
| GrGLShaderVar helperArgs[] = { |
| GrGLShaderVar("minComp", kFloat_GrSLType), |
| GrGLShaderVar("midComp", kFloat_GrSLType), |
| GrGLShaderVar("maxComp", kFloat_GrSLType), |
| GrGLShaderVar("sat", kFloat_GrSLType), |
| }; |
| static const char kHelperBody[] = "\tif (minComp < maxComp) {\n" |
| "\t\tvec3 result;\n" |
| "\t\tresult.r = 0.0;\n" |
| "\t\tresult.g = sat * (midComp - minComp) / (maxComp - minComp);\n" |
| "\t\tresult.b = sat;\n" |
| "\t\treturn result;\n" |
| "\t} else {\n" |
| "\t\treturn vec3(0, 0, 0);\n" |
| "\t}\n"; |
| builder->fsEmitFunction(kVec3f_GrSLType, |
| "set_saturation_helper", |
| SK_ARRAY_COUNT(helperArgs), helperArgs, |
| kHelperBody, |
| &helperFunction); |
| |
| GrGLShaderVar setSatArgs[] = { |
| GrGLShaderVar("hueLumColor", kVec3f_GrSLType), |
| GrGLShaderVar("satColor", kVec3f_GrSLType), |
| }; |
| const char* helpFunc = helperFunction.c_str(); |
| SkString setSatBody; |
| setSatBody.appendf("\tfloat sat = %s(satColor);\n" |
| "\tif (hueLumColor.r <= hueLumColor.g) {\n" |
| "\t\tif (hueLumColor.g <= hueLumColor.b) {\n" |
| "\t\t\thueLumColor.rgb = %s(hueLumColor.r, hueLumColor.g, hueLumColor.b, sat);\n" |
| "\t\t} else if (hueLumColor.r <= hueLumColor.b) {\n" |
| "\t\t\thueLumColor.rbg = %s(hueLumColor.r, hueLumColor.b, hueLumColor.g, sat);\n" |
| "\t\t} else {\n" |
| "\t\t\thueLumColor.brg = %s(hueLumColor.b, hueLumColor.r, hueLumColor.g, sat);\n" |
| "\t\t}\n" |
| "\t} else if (hueLumColor.r <= hueLumColor.b) {\n" |
| "\t\thueLumColor.grb = %s(hueLumColor.g, hueLumColor.r, hueLumColor.b, sat);\n" |
| "\t} else if (hueLumColor.g <= hueLumColor.b) {\n" |
| "\t\thueLumColor.gbr = %s(hueLumColor.g, hueLumColor.b, hueLumColor.r, sat);\n" |
| "\t} else {\n" |
| "\t\thueLumColor.bgr = %s(hueLumColor.b, hueLumColor.g, hueLumColor.r, sat);\n" |
| "\t}\n" |
| "\treturn hueLumColor;\n", |
| getFunction.c_str(), helpFunc, helpFunc, helpFunc, helpFunc, |
| helpFunc, helpFunc); |
| builder->fsEmitFunction(kVec3f_GrSLType, |
| "set_saturation", |
| SK_ARRAY_COUNT(setSatArgs), setSatArgs, |
| setSatBody.c_str(), |
| setSatFunction); |
| |
| } |
| |
| typedef GrGLEffect INHERITED; |
| }; |
| |
| GR_DECLARE_EFFECT_TEST; |
| |
| private: |
| XferEffect(SkXfermode::Mode mode, GrTexture* background) |
| : fMode(mode) { |
| if (background) { |
| fBackgroundTransform.reset(kLocal_GrCoordSet, background); |
| this->addCoordTransform(&fBackgroundTransform); |
| fBackgroundAccess.reset(background); |
| this->addTextureAccess(&fBackgroundAccess); |
| } else { |
| this->setWillReadDstColor(); |
| } |
| } |
| virtual bool onIsEqual(const GrEffect& other) const SK_OVERRIDE { |
| const XferEffect& s = CastEffect<XferEffect>(other); |
| return fMode == s.fMode && |
| fBackgroundAccess.getTexture() == s.fBackgroundAccess.getTexture(); |
| } |
| |
| SkXfermode::Mode fMode; |
| GrCoordTransform fBackgroundTransform; |
| GrTextureAccess fBackgroundAccess; |
| |
| typedef GrEffect INHERITED; |
| }; |
| |
| GR_DEFINE_EFFECT_TEST(XferEffect); |
| GrEffectRef* XferEffect::TestCreate(SkRandom* rand, |
| GrContext*, |
| const GrDrawTargetCaps&, |
| GrTexture*[]) { |
| int mode = rand->nextRangeU(SkXfermode::kLastCoeffMode + 1, SkXfermode::kLastSeparableMode); |
| |
| static AutoEffectUnref gEffect(SkNEW_ARGS(XferEffect, (static_cast<SkXfermode::Mode>(mode), NULL))); |
| return CreateEffectRef(gEffect); |
| } |
| |
| #endif |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| bool SkProcCoeffXfermode::asMode(Mode* mode) const { |
| if (mode) { |
| *mode = fMode; |
| } |
| return true; |
| } |
| |
| bool SkProcCoeffXfermode::asCoeff(Coeff* sc, Coeff* dc) const { |
| if (CANNOT_USE_COEFF == fSrcCoeff) { |
| return false; |
| } |
| |
| if (sc) { |
| *sc = fSrcCoeff; |
| } |
| if (dc) { |
| *dc = fDstCoeff; |
| } |
| return true; |
| } |
| |
| #if SK_SUPPORT_GPU |
| bool SkProcCoeffXfermode::asNewEffectOrCoeff(GrContext*, |
| GrEffectRef** effect, |
| Coeff* src, |
| Coeff* dst, |
| GrTexture* background) const { |
| if (this->asCoeff(src, dst)) { |
| return true; |
| } |
| if (XferEffect::IsSupportedMode(fMode)) { |
| if (NULL != effect) { |
| *effect = XferEffect::Create(fMode, background); |
| SkASSERT(NULL != *effect); |
| } |
| return true; |
| } |
| return false; |
| } |
| #endif |
| |
| void SkProcCoeffXfermode::flatten(SkFlattenableWriteBuffer& buffer) const { |
| this->INHERITED::flatten(buffer); |
| buffer.write32(fMode); |
| } |
| |
| const char* SkXfermode::ModeName(Mode mode) { |
| SkASSERT((unsigned) mode <= (unsigned)kLastMode); |
| const char* gModeStrings[] = { |
| "Clear", "Src", "Dst", "SrcOver", "DstOver", "SrcIn", "DstIn", |
| "SrcOut", "DstOut", "SrcATop", "DstATop", "Xor", "Plus", |
| "Modulate", "Screen", "Overlay", "Darken", "Lighten", "ColorDodge", |
| "ColorBurn", "HardLight", "SoftLight", "Difference", "Exclusion", |
| "Multiply", "Hue", "Saturation", "Color", "Luminosity" |
| }; |
| return gModeStrings[mode]; |
| SK_COMPILE_ASSERT(SK_ARRAY_COUNT(gModeStrings) == kLastMode + 1, mode_count); |
| } |
| |
| #ifdef SK_DEVELOPER |
| void SkProcCoeffXfermode::toString(SkString* str) const { |
| str->append("SkProcCoeffXfermode: "); |
| |
| str->append("mode: "); |
| str->append(ModeName(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 |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SK_DECLARE_STATIC_MUTEX(gCachedXfermodesMutex); |
| static SkXfermode* gCachedXfermodes[SkXfermode::kLastMode + 1]; |
| |
| void SkXfermode::Term() { |
| SkAutoMutexAcquire ac(gCachedXfermodesMutex); |
| |
| for (size_t i = 0; i < SK_ARRAY_COUNT(gCachedXfermodes); ++i) { |
| SkSafeUnref(gCachedXfermodes[i]); |
| gCachedXfermodes[i] = NULL; |
| } |
| } |
| |
| extern SkProcCoeffXfermode* SkPlatformXfermodeFactory(const ProcCoeff& rec, |
| SkXfermode::Mode mode); |
| |
| SkXfermode* SkXfermode::Create(Mode mode) { |
| SkASSERT(SK_ARRAY_COUNT(gProcCoeffs) == kModeCount); |
| SkASSERT(SK_ARRAY_COUNT(gCachedXfermodes) == kModeCount); |
| |
| if ((unsigned)mode >= kModeCount) { |
| // report error |
| return NULL; |
| } |
| |
| // Skia's "defaut" mode is srcover. NULL in SkPaint is interpreted as srcover |
| // so we can just return NULL from the factory. |
| if (kSrcOver_Mode == mode) { |
| return NULL; |
| } |
| |
| // guard our access to gCachedXfermodes, since we may write into it |
| SkAutoMutexAcquire ac(gCachedXfermodesMutex); |
| |
| SkXfermode* xfer = gCachedXfermodes[mode]; |
| if (NULL == xfer) { |
| const ProcCoeff& rec = gProcCoeffs[mode]; |
| |
| // check if we have a platform optim for that |
| SkProcCoeffXfermode* xfm = SkPlatformXfermodeFactory(rec, mode); |
| if (xfm != NULL) { |
| xfer = xfm; |
| } else { |
| // All modes can in theory be represented by the ProcCoeff rec, since |
| // it contains function ptrs. However, a few modes are both simple and |
| // commonly used, so we call those out for their own subclasses here. |
| switch (mode) { |
| case kClear_Mode: |
| xfer = SkNEW_ARGS(SkClearXfermode, (rec)); |
| break; |
| case kSrc_Mode: |
| xfer = SkNEW_ARGS(SkSrcXfermode, (rec)); |
| break; |
| case kSrcOver_Mode: |
| SkASSERT(false); // should not land here |
| break; |
| case kDstIn_Mode: |
| xfer = SkNEW_ARGS(SkDstInXfermode, (rec)); |
| break; |
| case kDstOut_Mode: |
| xfer = SkNEW_ARGS(SkDstOutXfermode, (rec)); |
| break; |
| default: |
| // no special-case, just rely in the rec and its function-ptrs |
| xfer = SkNEW_ARGS(SkProcCoeffXfermode, (rec, mode)); |
| break; |
| } |
| } |
| gCachedXfermodes[mode] = xfer; |
| } |
| return SkSafeRef(xfer); |
| } |
| |
| 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 |
| { NULL, NULL, NULL }, // multiply |
| { NULL, NULL, NULL }, // hue |
| { NULL, NULL, NULL }, // saturation |
| { NULL, NULL, NULL }, // color |
| { NULL, NULL, NULL }, // luminosity |
| }; |
| |
| 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) |
| #if !SK_ARM_NEON_IS_NONE |
| SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkNEONProcCoeffXfermode) |
| #endif |
| SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END |
