| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkLightingShader_DEFINED |
| #define SkLightingShader_DEFINED |
| |
| #include "SkLights.h" |
| #include "SkShader.h" |
| |
| class SkBitmap; |
| class SkMatrix; |
| class SkNormalSource; |
| |
| class SK_API SkLightingShader { |
| public: |
| /** Returns a shader that lights the shape, colored by the diffuseShader, using the |
| normals from normalSource, with the set of lights provided. |
| |
| @param diffuseShader the shader that provides the colors. If nullptr, uses the paint's |
| color. |
| @param normalSource the source for the shape's normals. If nullptr, assumes straight |
| up normals (<0,0,1>). |
| @param lights the lights applied to the normals |
| |
| The lighting equation is currently: |
| result = (LightColor * dot(Normal, LightDir) + AmbientColor) * DiffuseColor |
| |
| */ |
| static sk_sp<SkShader> Make(sk_sp<SkShader> diffuseShader, sk_sp<SkNormalSource> normalSource, |
| sk_sp<SkLights> lights); |
| |
| SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP() |
| }; |
| |
| #endif |