1 /* 2 * Copyright 2015 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkPM_DEFINED 9 #define SkPM_DEFINED 10 11 #include "SkTypes.h" 12 #include "SkColor.h" 13 #include "SkColorPriv.h" 14 #include "SkNx.h" 15 16 // A pre-multiplied color storing each component in the same order as SkPMColor, 17 // but as a float in the range [0, 255]. 18 class SkPMFloat : public Sk4f { 19 public: FromPMColor(SkPMColor c)20 static SkPMFloat FromPMColor(SkPMColor c) { return SkPMFloat(c); } FromARGB(float a,float r,float g,float b)21 static SkPMFloat FromARGB(float a, float r, float g, float b) { return SkPMFloat(a,r,g,b); } 22 23 // May be more efficient than one at a time. No special alignment assumed for SkPMColors. 24 static void From4PMColors(const SkPMColor[4], SkPMFloat*, SkPMFloat*, SkPMFloat*, SkPMFloat*); 25 26 // Uninitialized. SkPMFloat()27 SkPMFloat() {} 28 explicit SkPMFloat(SkPMColor); SkPMFloat(float a,float r,float g,float b)29 SkPMFloat(float a, float r, float g, float b) 30 #ifdef SK_PMCOLOR_IS_RGBA 31 : INHERITED(r,g,b,a) {} 32 #else 33 : INHERITED(b,g,r,a) {} 34 #endif 35 SkPMFloat(const Sk4f & fs)36 SkPMFloat(const Sk4f& fs) : INHERITED(fs) {} 37 a()38 float a() const { return this->kth<SK_A32_SHIFT / 8>(); } r()39 float r() const { return this->kth<SK_R32_SHIFT / 8>(); } g()40 float g() const { return this->kth<SK_G32_SHIFT / 8>(); } b()41 float b() const { return this->kth<SK_B32_SHIFT / 8>(); } 42 43 // N.B. All methods returning an SkPMColor call SkPMColorAssert on that result before returning. 44 45 // round() and roundClamp() round component values to the nearest integer. 46 SkPMColor round() const; // Assumes all values in [0, 255]. Some implementations may clamp. 47 SkPMColor roundClamp() const; // Will clamp all values to [0, 255]. 48 49 // Like round(), but truncates instead of rounding. 50 // The domain of this function is (-1.0f, 256.0f). Values in (-1.0f, 0.0f] trunc to a zero. 51 SkPMColor trunc() const; 52 53 // 4-at-a-time versions of round() and roundClamp(). Like From4PMColors(), no alignment assumed. 54 static void RoundTo4PMColors( 55 const SkPMFloat&, const SkPMFloat&, const SkPMFloat&, const SkPMFloat&, SkPMColor[4]); 56 static void RoundClampTo4PMColors( 57 const SkPMFloat&, const SkPMFloat&, const SkPMFloat&, const SkPMFloat&, SkPMColor[4]); 58 isValid()59 bool isValid() const { 60 return this->a() >= 0 && this->a() <= 255 61 && this->r() >= 0 && this->r() <= this->a() 62 && this->g() >= 0 && this->g() <= this->a() 63 && this->b() >= 0 && this->b() <= this->a(); 64 } 65 66 private: 67 typedef Sk4f INHERITED; 68 }; 69 70 #ifdef SKNX_NO_SIMD 71 // Platform implementations of SkPMFloat assume Sk4f uses SSE or NEON. _none is generic. 72 #include "../opts/SkPMFloat_none.h" 73 #else 74 #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3 75 #include "../opts/SkPMFloat_SSSE3.h" 76 #elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2 77 #include "../opts/SkPMFloat_SSE2.h" 78 #elif defined(SK_ARM_HAS_NEON) 79 #include "../opts/SkPMFloat_neon.h" 80 #else 81 #include "../opts/SkPMFloat_none.h" 82 #endif 83 #endif 84 85 #endif//SkPM_DEFINED 86