Split SkGradientShader into separate files for each gradient subclass.

Review URL: https://codereview.appspot.com/6447049

git-svn-id: http://skia.googlecode.com/svn/trunk@4792 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 82 insertions, 0 deletions

diff --git a/src/effects/gradients/SkTwoPointConicalGradient.h b/src/effects/gradients/SkTwoPointConicalGradient.h
new file mode 100644
index 0000000000..de3e80d1e0
--- /dev/null
+++ b/src/effects/gradients/SkTwoPointConicalGradient.h
@@ -0,0 +1,82 @@
+
+/*
+ * Copyright 2012 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+ #ifndef SkTwoPointConicalGradient_DEFINED
+ #define SkTwoPointConicalGradient_DEFINED
+
+#include "SkGradientShaderPriv.h"
+
+struct TwoPtRadial {
+    enum {
+        kDontDrawT  = 0x80000000
+    };
+
+    float   fCenterX, fCenterY;
+    float   fDCenterX, fDCenterY;
+    float   fRadius;
+    float   fDRadius;
+    float   fA;
+    float   fRadius2;
+    float   fRDR;
+
+    void init(const SkPoint& center0, SkScalar rad0,
+              const SkPoint& center1, SkScalar rad1);
+    
+    // used by setup and nextT
+    float   fRelX, fRelY, fIncX, fIncY;
+    float   fB, fDB;
+    
+    void setup(SkScalar fx, SkScalar fy, SkScalar dfx, SkScalar dfy);
+    SkFixed nextT();
+    
+    static bool DontDrawT(SkFixed t) {
+        return kDontDrawT == (uint32_t)t;
+    }
+};
+
+
+class SkTwoPointConicalGradient : public SkGradientShaderBase {
+    TwoPtRadial fRec;
+    void init();
+
+public:
+    SkTwoPointConicalGradient(const SkPoint& start, SkScalar startRadius,
+                              const SkPoint& end, SkScalar endRadius,
+                              const SkColor colors[], const SkScalar pos[],
+                              int colorCount, SkShader::TileMode mode,
+                              SkUnitMapper* mapper);
+    
+    virtual void shadeSpan(int x, int y, SkPMColor* dstCParam,
+                           int count) SK_OVERRIDE;
+    virtual bool setContext(const SkBitmap& device,
+                            const SkPaint& paint,
+                            const SkMatrix& matrix) SK_OVERRIDE;
+
+    virtual BitmapType asABitmap(SkBitmap* bitmap,
+                                 SkMatrix* matrix,
+                                 TileMode* xy) const;
+    virtual SkShader::GradientType asAGradient(GradientInfo* info) const  SK_OVERRIDE;
+    virtual GrCustomStage* asNewCustomStage(GrContext* context,
+        GrSamplerState* sampler) const SK_OVERRIDE;
+
+    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTwoPointConicalGradient)
+    
+protected:
+    SkTwoPointConicalGradient(SkFlattenableReadBuffer& buffer);
+    virtual void flatten(SkFlattenableWriteBuffer& buffer) const SK_OVERRIDE;
+    
+private:
+    typedef SkGradientShaderBase INHERITED;
+    const SkPoint fCenter1;
+    const SkPoint fCenter2;
+    const SkScalar fRadius1;
+    const SkScalar fRadius2;
+};
+
+#endif
+