Revert "Update SkLightingShader to support rotation"

src/core/SkLightingShader.h

-
-/*
- * 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 "SkFlattenable.h"
-#include "SkLight.h"
-#include "SkShader.h"
-#include "SkTDArray.h"
-
-class SkBitmap;
-class SkMatrix;
-
-class SK_API SkLightingShader {
-public:
-    class Lights  : public SkRefCnt {
-    public:
-        class Builder {
-        public:
-            Builder(const SkLight lights[], int numLights)
-                : fLights(SkNEW_ARGS(Lights, (lights, numLights))) {
-            }
-
-            Builder() : fLights(SkNEW(Lights)) { }
-    
-            // TODO: limit the number of lights here or just ignore those
-            // above some maximum?
-            void add(const SkLight& light) {
-                if (fLights) {
-                    *fLights->fLights.push() = light;
-                }
-            }
-
-            const Lights* finish() {
-                return fLights.detach();
-            }
-
-        private:
-            SkAutoTUnref<Lights> fLights;
-        };
-
-        int numLights() const {
-            return fLights.count();
-        }
-
-        const SkLight& light(int index) const {
-            return fLights[index];
-        }
-
-    private:
-        Lights() {}
-        Lights(const SkLight lights[], int numLights) : fLights(lights, numLights) {}
-
-        SkTDArray<SkLight> fLights;
-
-        typedef SkRefCnt INHERITED;
-    };
-
-    /** Returns a shader that lights the diffuse and normal maps with a single light.
-
-        It returns a shader with a reference count of 1.
-        The caller should decrement the shader's reference count when done with the shader.
-        It is an error for count to be < 2.
-        @param  diffuse     the diffuse bitmap
-        @param  normal      the normal map
-        @param  light       the light applied to the normal map
-        @param  ambient     the linear (unpremul) ambient light color. Range is 0..1/channel.
-        @param  localMatrix the matrix mapping the textures to the dest rect 
-
-        NULL will be returned if:
-            either 'diffuse' or 'normal' are empty
-            either 'diffuse' or 'normal' are too big (> 65535 on a side)
-            'diffuse' and 'normal' aren't the same size
-
-        The lighting equation is currently:
-            result = LightColor * DiffuseColor * (Normal * LightDir) + AmbientColor
-
-        The normal map is currently assumed to be an 8888 image where the normal at a texel
-        is retrieved by:
-            N.x = R-127;
-            N.y = G-127;
-            N.z = B-127;
-            N.normalize();
-        The +Z axis is thus encoded in RGB as (127, 127, 255) while the -Z axis is
-        (127, 127, 0).
-    */
-    static SkShader* Create(const SkBitmap& diffuse, const SkBitmap& normal,
-                            const Lights* lights, const SkVector& invNormRotation,
-                            const SkMatrix* diffLocalMatrix, const SkMatrix* normLocalMatrix);
-
-    SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP()
-};
-
-#endif