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Commit c495e611 authored by Rob Tsuk's avatar Rob Tsuk
Browse files

Add a way to override Xfermode 

Add a non-public API to Canvas/GLES20Canvas to provide a way to draw
the touch ripple animation without using a save layer.

Bug: 18226391
Change-Id: I6f8fb8938505e976892c4e14f6f864362c43e73c
parent d71152fc

core/java/android/view/GLES20Canvas.java

+11 −0
Original line number Diff line number Diff line
@@ -988,4 +988,15 @@ class GLES20Canvas extends HardwareCanvas { 
            int indexOffset, int indexCount, Paint paint) {

        // TODO: Implement

    }



    @Override

    public void setOverrideXfermode(PorterDuff.Mode xfermode) {

        int xfermodeValue = -1;

        if (xfermode != null) {

            xfermodeValue = xfermode.nativeInt;

        }

        nSetOverrideXfermode(mRenderer, xfermodeValue);

    }



    private static native void nSetOverrideXfermode(long renderer, int xfermode);

}

core/jni/android_view_GLES20Canvas.cpp

+8 −0
Original line number Diff line number Diff line
@@ -172,6 +172,12 @@ static jint android_view_GLES20Canvas_getMaxTextureHeight(JNIEnv* env, jobject c 
    return Caches::getInstance().maxTextureSize;

}



static void android_view_GLES20Canvas_setOverrideXfermode(JNIEnv* env, jobject clazz,

        jlong rendererPtr, int xfermode) {

    DisplayListRenderer* renderer = reinterpret_cast<DisplayListRenderer*>(rendererPtr);

    renderer->setOverrideXfermode(xfermode);

}



// ----------------------------------------------------------------------------

// State

// ----------------------------------------------------------------------------
@@ -953,6 +959,8 @@ static JNINativeMethod gMethods[] = { 
    { "nGetMaximumTextureWidth",  "()I",       (void*) android_view_GLES20Canvas_getMaxTextureWidth },

    { "nGetMaximumTextureHeight", "()I",       (void*) android_view_GLES20Canvas_getMaxTextureHeight },



    { "nSetOverrideXfermode", "(JI)V",       (void*) android_view_GLES20Canvas_setOverrideXfermode },



#endif

};

graphics/java/android/graphics/Canvas.java

+9 −0
Original line number Diff line number Diff line
@@ -249,6 +249,15 @@ public class Canvas { 
    /** @hide */

    public void insertInorderBarrier() {}



    /**

     * Set a transfer mode that overrides any transfer modes

     * in paints used for drawing. Pass null to disable this

     * override. Only implemented in GLES20Canvas.

     *

     * @hide

     */

    public void setOverrideXfermode(@Nullable PorterDuff.Mode xfermode) {}



    /**

     * Return true if the device that the current layer draws into is opaque

     * (i.e. does not support per-pixel alpha).

libs/hwui/DisplayListRenderer.cpp

+1 −0
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ DisplayListRenderer::DisplayListRenderer() 
    , mTranslateY(0.0f)

    , mDeferredBarrierType(kBarrier_None)

    , mHighContrastText(false)

    , mOverrideXfermode(-1)

    , mRestoreSaveCount(-1) {

}

libs/hwui/DisplayListRenderer.h

+21 −3
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 
#include <SkPath.h>

#include <SkRegion.h>

#include <SkTLazy.h>

#include <SkPorterDuff.h>

#include <cutils/compiler.h>



#include "CanvasState.h"
@@ -189,6 +190,14 @@ public: 
    virtual void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored) { }

    virtual GLuint onGetTargetFbo() const { return -1; }



    void setOverrideXfermode(int xfermode) {

        if (xfermode != -1) {

            SkPorterDuff::Mode porterDuffMode = static_cast<SkPorterDuff::Mode>(xfermode);

            xfermode = SkPorterDuff::ToXfermodeMode(porterDuffMode);

        }

        mOverrideXfermode = xfermode;

    };



private:



    CanvasState mState;
@@ -253,10 +262,16 @@ private: 


        // If there is a draw filter apply it here and store the modified paint

        // so that we don't need to modify the paint every time we access it.

        SkTLazy<SkPaint> filteredPaint;

        SkTLazy<SkPaint> localPaint;

        if (mDrawFilter.get()) {

           paint = filteredPaint.init();

           mDrawFilter->filter(filteredPaint.get(), SkDrawFilter::kPaint_Type);

           paint = localPaint.set(*paint);

           mDrawFilter->filter(localPaint.get(), SkDrawFilter::kPaint_Type);

        }



        if (mOverrideXfermode != -1) {

            SkPaint* overriddenPaint = localPaint.set(*paint);

            overriddenPaint->setXfermodeMode(static_cast<SkXfermode::Mode>(mOverrideXfermode));

            paint = overriddenPaint;

        }



        // compute the hash key for the paint and check the cache.
@@ -334,6 +349,9 @@ private: 
    DeferredBarrierType mDeferredBarrierType;

    bool mHighContrastText;



    // -1 if unset, or SkXfermode::Mode value if set

    int mOverrideXfermode;



    int mRestoreSaveCount;



    SkAutoTUnref<SkDrawFilter> mDrawFilter;