Remove SkPorterDuff now that Android has been updated.

include/effects/SkPorterDuff.h

-/*
- * Copyright 2006 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 SkPorterDuff_DEFINED
-#define SkPorterDuff_DEFINED
-
-#include "SkColor.h"
-#include "SkXfermode.h"
-
-//#define SK_SUPPORT_LEGACY_PORTER_DUFF
-
-// Temporary guard until we can remove the dependencies in android. Then we
-// plan to remove this entirely.
-#ifdef SK_SUPPORT_LEGACY_PORTER_DUFF
-
-class SkXfermode;
-
-class SK_API SkPorterDuff {
-public:
-    /** List of predefined xfermodes. In general, the algebra for the modes
-        uses the following symbols:
-        Sa, Sc  - source alpha and color
-        Da, Dc - destination alpha and color (before compositing)
-        [a, c] - Resulting (alpha, color) values
-        For these equations, the colors are in premultiplied state.
-        If no xfermode is specified, kSrcOver is assumed.
-    */
-    enum Mode {
-        kClear_Mode,    //!< [0, 0]
-        kSrc_Mode,      //!< [Sa, Sc]
-        kDst_Mode,      //!< [Da, Dc]
-        kSrcOver_Mode,  //!< [Sa + Da - Sa*Da, Rc = Sc + (1 - Sa)*Dc]
-        kDstOver_Mode,  //!< [Sa + Da - Sa*Da, Rc = Dc + (1 - Da)*Sc]
-        kSrcIn_Mode,    //!< [Sa * Da, Sc * Da]
-        kDstIn_Mode,    //!< [Sa * Da, Sa * Dc]
-        kSrcOut_Mode,   //!< [Sa * (1 - Da), Sc * (1 - Da)]
-        kDstOut_Mode,   //!< [Da * (1 - Sa), Dc * (1 - Sa)]
-        kSrcATop_Mode,  //!< [Da, Sc * Da + (1 - Sa) * Dc]
-        kDstATop_Mode,  //!< [Sa, Sa * Dc + Sc * (1 - Da)]
-        kXor_Mode,      //!< [Sa + Da - 2 * Sa * Da, Sc * (1 - Da) + (1 - Sa) * Dc]
-        kDarken_Mode,   //!< [Sa + Da - Sa*Da, Sc*(1 - Da) + Dc*(1 - Sa) + min(Sc, Dc)]
-        kLighten_Mode,  //!< [Sa + Da - Sa*Da, Sc*(1 - Da) + Dc*(1 - Sa) + max(Sc, Dc)]
-        kModulate_Mode, //!< [Sa * Da, Sc * Dc] multiplies all components
-        kScreen_Mode,   //!< [Sa + Da - Sa * Da, Sc + Dc - Sc * Dc]
-        kAdd_Mode,      //!< Saturate(S + D)
-#ifdef SK_BUILD_FOR_ANDROID
-        kOverlay_Mode,
-#endif
-
-        kModeCount
-    };
-
-    /** Return an SkXfermode object for the specified mode.
-    */
-    static SkXfermode* CreateXfermode(Mode mode);
-
-    /** Return a function pointer to a routine that applies the specified
-        porter-duff transfer mode.
-    */
-    static SkXfermodeProc GetXfermodeProc(Mode mode);
-
-    /** Return a function pointer to a routine that applies the specified
-        porter-duff transfer mode and srcColor to a 16bit device color. Note,
-        if the mode+srcColor might return a non-opaque color, then there is not
-        16bit proc, and this will return NULL.
-    */
-    static SkXfermodeProc16 GetXfermodeProc16(Mode mode, SkColor srcColor);
-
-    /** If the specified xfermode advertises itself as one of the porterduff
-        modes (via SkXfermode::Coeff), return true and if not null, set mode
-        to the corresponding porterduff mode. If it is not recognized as a one,
-        return false and ignore the mode parameter.
-    */
-    static bool IsMode(SkXfermode*, Mode* mode);
-
-    /** Return the corersponding SkXfermode::Mode
-     */
-    static SkXfermode::Mode ToXfermodeMode(Mode);
-} SK_ATTR_DEPRECATED("use SkXfermode::Mode");
-
-#endif
-
-#endif