auto import from //depot/cupcake/@135843

1 files changed, 73 insertions, 0 deletions

diff --git a/include/effects/SkAvoidXfermode.h b/include/effects/SkAvoidXfermode.h
new file mode 100644
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+++ b/include/effects/SkAvoidXfermode.h
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+/*
+ * Copyright (C) 2006 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SkAvoidXfermode_DEFINED
+#define SkAvoidXfermode_DEFINED
+
+#include "SkXfermode.h"
+
+/** \class SkAvoidXfermode
+
+    This xfermode will draw the src everywhere except on top of the specified
+    color.
+*/
+class SkAvoidXfermode : public SkXfermode {
+public:
+    enum Mode {
+        kAvoidColor_Mode,   //!< draw everywhere except on the opColor
+        kTargetColor_Mode   //!< draw only on top of the opColor
+    };
+
+    /** This xfermode will draw the src everywhere except on top of the opColor
+        or, depending on the Mode, draw only on top of the opColor.
+        @param opColor  the color to avoid (or to target depending on Mode).
+                        note: the alpha in opColor is ignored
+        @param tolerance    How closely we compare a pixel to the opColor.
+                            0 - only operate if exact match
+                            255 - maximum gradation (blending) based on how
+                            similar the pixel is to our opColor (max tolerance)
+        @param mode If we should avoid or target the opColor
+    */
+    SkAvoidXfermode(SkColor opColor, U8CPU tolerance, Mode mode);
+
+    // overrides from SkXfermode
+    virtual void xfer32(SkPMColor dst[], const SkPMColor src[], int count,
+                        const SkAlpha aa[]);
+    virtual void xfer16(uint16_t dst[], const SkPMColor src[], int count,
+                        const SkAlpha aa[]);
+    virtual void xfer4444(uint16_t dst[], const SkPMColor src[], int count,
+                          const SkAlpha aa[]);
+    virtual void xferA8(SkAlpha dst[], const SkPMColor src[], int count,
+                        const SkAlpha aa[]);
+
+    // overrides from SkFlattenable
+    virtual Factory getFactory();
+    virtual void flatten(SkFlattenableWriteBuffer&);
+
+protected:
+    SkAvoidXfermode(SkFlattenableReadBuffer&);
+
+private:
+    SkColor     fOpColor;
+    uint32_t    fDistMul;   // x.14
+    Mode        fMode;
+    
+    static SkFlattenable* Create(SkFlattenableReadBuffer&);
+    
+    typedef SkXfermode INHERITED;
+};
+
+#endif