| /* |
| * Copyright 2012 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. |
| */ |
| |
| #ifndef SkLightingImageFilter_DEFINED |
| #define SkLightingImageFilter_DEFINED |
| |
| #include "SkImageFilter.h" |
| #include "SkColor.h" |
| |
| class SK_API SkPoint3 { |
| public: |
| SkPoint3() {} |
| SkPoint3(SkScalar x, SkScalar y, SkScalar z) |
| : fX(x), fY(y), fZ(z) {} |
| SkScalar dot(const SkPoint3& other) const { |
| return fX * other.fX + fY * other.fY + fZ * other.fZ; |
| } |
| SkScalar maxComponent() const { |
| return fX > fY ? (fX > fZ ? fX : fZ) : (fY > fZ ? fY : fZ); |
| } |
| void normalize() { |
| // Small epsilon is added to prevent division by 0. |
| SkScalar scale = SkScalarInvert(SkScalarSqrt(dot(*this)) + SK_ScalarNearlyZero); |
| fX = fX * scale; |
| fY = fY * scale; |
| fZ = fZ * scale; |
| } |
| SkPoint3 operator*(SkScalar scalar) const { |
| return SkPoint3(fX * scalar, fY * scalar, fZ * scalar); |
| } |
| SkPoint3 operator-(const SkPoint3& other) const { |
| return SkPoint3(fX - other.fX, fY - other.fY, fZ - other.fZ); |
| } |
| bool operator==(const SkPoint3& other) const { |
| return fX == other.fX && fY == other.fY && fZ == other.fZ; |
| } |
| SkScalar fX, fY, fZ; |
| }; |
| |
| class SkLight; |
| |
| class SK_API SkLightingImageFilter : public SkImageFilter { |
| public: |
| static SkImageFilter* CreateDistantLitDiffuse(const SkPoint3& direction, |
| SkColor lightColor, SkScalar surfaceScale, SkScalar kd, |
| SkImageFilter* input = NULL, const CropRect* cropRect = NULL); |
| static SkImageFilter* CreatePointLitDiffuse(const SkPoint3& location, |
| SkColor lightColor, SkScalar surfaceScale, SkScalar kd, |
| SkImageFilter* input = NULL, const CropRect* cropRect = NULL); |
| static SkImageFilter* CreateSpotLitDiffuse(const SkPoint3& location, |
| const SkPoint3& target, SkScalar specularExponent, SkScalar cutoffAngle, |
| SkColor lightColor, SkScalar surfaceScale, SkScalar kd, |
| SkImageFilter* input = NULL, const CropRect* cropRect = NULL); |
| static SkImageFilter* CreateDistantLitSpecular(const SkPoint3& direction, |
| SkColor lightColor, SkScalar surfaceScale, SkScalar ks, |
| SkScalar shininess, SkImageFilter* input = NULL, const CropRect* cropRect = NULL); |
| static SkImageFilter* CreatePointLitSpecular(const SkPoint3& location, |
| SkColor lightColor, SkScalar surfaceScale, SkScalar ks, |
| SkScalar shininess, SkImageFilter* input = NULL, const CropRect* cropRect = NULL); |
| static SkImageFilter* CreateSpotLitSpecular(const SkPoint3& location, |
| const SkPoint3& target, SkScalar specularExponent, SkScalar cutoffAngle, |
| SkColor lightColor, SkScalar surfaceScale, SkScalar ks, |
| SkScalar shininess, SkImageFilter* input = NULL, const CropRect* cropRect = NULL); |
| ~SkLightingImageFilter(); |
| |
| SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP() |
| |
| protected: |
| SkLightingImageFilter(SkLight* light, |
| SkScalar surfaceScale, |
| SkImageFilter* input, |
| const CropRect* cropRect); |
| explicit SkLightingImageFilter(SkReadBuffer& buffer); |
| virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE; |
| const SkLight* light() const { return fLight; } |
| SkScalar surfaceScale() const { return fSurfaceScale; } |
| |
| private: |
| typedef SkImageFilter INHERITED; |
| SkLight* fLight; |
| SkScalar fSurfaceScale; |
| }; |
| |
| #endif |