C++ SkPicture::unref方法代码示例

void SampleWindow::afterChildren(SkCanvas* orig) {
    switch (fCanvasType) {
    case kRaster_CanvasType:
        break;
    case kPicture_CanvasType:
        if (true) {
            SkPicture* pict = new SkPicture(*fPicture);
            fPicture->unref();
            orig->drawPicture(*pict);
            pict->unref();
        } else if (true) {
            SkDynamicMemoryWStream ostream;
            fPicture->serialize(&ostream);
            fPicture->unref();

            SkMemoryStream istream(ostream.getStream(), ostream.getOffset());
            SkPicture pict(&istream);
            orig->drawPicture(pict);
        } else {
            fPicture->draw(orig);
            fPicture->unref();
        }
        fPicture = NULL;
        break;
#ifdef SK_SUPPORT_GL
    case kOpenGL_CanvasType:
        glFlush();
        delete fGLCanvas;
        fGLCanvas = NULL;
#ifdef USE_OFFSCREEN
        reverseRedAndBlue(orig->getDevice()->accessBitmap(true));
#endif
        break;
#endif
    }

//    if ((fScrollTestX | fScrollTestY) != 0)
    {
        const SkBitmap& bm = orig->getDevice()->accessBitmap(true);
        int dx = fScrollTestX * 7;
        int dy = fScrollTestY * 7;
        SkIRect r;
        SkRegion inval;

        r.set(50, 50, 50+100, 50+100);
        bm.scrollRect(&r, dx, dy, &inval);
        paint_rgn(bm, r, inval);
    }
}

    virtual void onDraw(SkCanvas* canvas) {
        this->drawBG(canvas);

        SkMatrix matrix;

        SkGroupShape* gs = new SkGroupShape;
        SkAutoUnref aur(gs);
        gs->appendShape(&fGroup);
        matrix.setScale(-SK_Scalar1, SK_Scalar1);
        matrix.postTranslate(SkIntToScalar(220), SkIntToScalar(240));
        gs->appendShape(&fGroup, matrix);
        matrix.setTranslate(SkIntToScalar(240), 0);
        matrix.preScale(SK_Scalar1*2, SK_Scalar1*2);
        gs->appendShape(&fGroup, matrix);

#if 1
        SkPicture* pict = new SkPicture;
        SkCanvas* cv = pict->beginRecording(1000, 1000);
        cv->scale(SK_ScalarHalf, SK_ScalarHalf);
        gs->draw(cv);
        cv->translate(SkIntToScalar(680), SkIntToScalar(480));
        cv->scale(-SK_Scalar1, SK_Scalar1);
        gs->draw(cv);
        pict->endRecording();
        canvas->drawPicture(*pict);
        pict->unref();
#endif
}

static void test_clone_empty(skiatest::Reporter* reporter) {
    // This is a regression test for crbug.com/172062
    // Before the fix, we used to crash accessing a null pointer when we
    // had a picture with no paints. This test passes by not crashing.
    {
        SkPicture picture;
        picture.beginRecording(1, 1);
        picture.endRecording();
        SkPicture* destPicture = picture.clone();
        REPORTER_ASSERT(reporter, NULL != destPicture);
        destPicture->unref();
    }
    {
        // Test without call to endRecording
        SkPicture picture;
        picture.beginRecording(1, 1);
        SkPicture* destPicture = picture.clone();
        REPORTER_ASSERT(reporter, NULL != destPicture);
        destPicture->unref();
    }
}

    void drawpicture(SkCanvas* canvas, SkPicture& pict) {
#if 0
        SkDynamicMemoryWStream ostream;
        pict.serialize(&ostream);

        SkMemoryStream istream(ostream.getStream(), ostream.getOffset());
        SkPicture* newPict = new SkPicture(&istream);
        canvas->drawPicture(*newPict);
        newPict->unref();
#else
        canvas->drawPicture(pict);
#endif
    }

    virtual void onDrawContent(SkCanvas* canvas) {
        SkScalar angle = SampleCode::GetAnimScalar(SkIntToScalar(180),
                                                   SkIntToScalar(360));

        SkMatrix saveM = *fMatrixRefs[3];
        SkScalar c = SkIntToScalar(50);
        fMatrixRefs[3]->preRotate(angle, c, c);
        
        const SkScalar dx = 350;
        const SkScalar dy = 500;
        const int N = 1;
        for (int v = -N; v <= N; v++) {
            for (int h = -N; h <= N; h++) {
                SkAutoCanvasRestore acr(canvas, true);
                canvas->translate(h * dx, v * dy);
        
        SkMatrix matrix;
     
        SkGroupShape* gs = new SkGroupShape;
        SkAutoUnref aur(gs);
        gs->appendShape(&fGroup);
        matrix.setScale(-SK_Scalar1, SK_Scalar1);
        matrix.postTranslate(SkIntToScalar(220), SkIntToScalar(240));
        gs->appendShape(&fGroup, matrix);
        matrix.setTranslate(SkIntToScalar(240), 0);
        matrix.preScale(SK_Scalar1*2, SK_Scalar1*2);
        gs->appendShape(&fGroup, matrix);
        
#if 1
        SkPicture* pict = new SkPicture;
        SkCanvas* cv = pict->beginRecording(1000, 1000);
        cv->scale(SK_ScalarHalf, SK_ScalarHalf);
        gs->draw(cv);
        cv->translate(SkIntToScalar(680), SkIntToScalar(480));
        cv->scale(-SK_Scalar1, SK_Scalar1);
        gs->draw(cv);
        pict->endRecording();
        
        drawpicture(canvas, *pict);
        pict->unref();
#endif

        }}

        *fMatrixRefs[3] = saveM;
        this->inval(NULL);
}

void TestResult::testOne() {
    SkPicture* pic = nullptr;
    {
    #if DEBUG_SHOW_TEST_NAME
        if (fTestStep == kCompareBits) {
            SkString testName(fFilename);
            const char http[] = "http";
            if (testName.startsWith(http)) {
                testName.remove(0, sizeof(http) - 1);
            }
            while (testName.startsWith("_")) {
                testName.remove(0, 1);
            }
            const char dotSkp[] = ".skp";
            if (testName.endsWith(dotSkp)) {
                size_t len = testName.size();
                testName.remove(len - (sizeof(dotSkp) - 1), sizeof(dotSkp) - 1);
            }
            testName.prepend("skp");
            testName.append("1");
            strncpy(DEBUG_FILENAME_STRING, testName.c_str(), DEBUG_FILENAME_STRING_LENGTH);
        } else if (fTestStep == kEncodeFiles) {
            strncpy(DEBUG_FILENAME_STRING, "", DEBUG_FILENAME_STRING_LENGTH);
        }
    #endif
        SkString path = get_in_path(fDirNo, fFilename);
        SkFILEStream stream(path.c_str());
        if (!stream.isValid()) {
            SkDebugf("invalid stream %s\n", path.c_str());
            goto finish;
        }
        pic = SkPicture::CreateFromStream(&stream, &SkImageDecoder::DecodeMemory);
        if (!pic) {
            SkDebugf("unable to decode %s\n", fFilename);
            goto finish;
        }
        SkScalar width = pic->cullRect().width();
        SkScalar height = pic->cullRect().height();
        SkBitmap oldBitmap, opBitmap;
        fScale = 1;
        while (width / fScale > 32767 || height / fScale > 32767) {
            ++fScale;
        }
        do {
            int dimX = SkScalarCeilToInt(width / fScale);
            int dimY = SkScalarCeilToInt(height / fScale);
            if (oldBitmap.tryAllocN32Pixels(dimX, dimY) && opBitmap.tryAllocN32Pixels(dimX, dimY)) {
                break;
            }
            SkDebugf("-%d-", fScale);
        } while (++fScale < 256);
        if (fScale >= 256) {
            SkDebugf("unable to allocate bitmap for %s (w=%f h=%f)\n", fFilename,
                    width, height);
            goto finish;
        }
        oldBitmap.eraseColor(SK_ColorWHITE);
        SkCanvas oldCanvas(oldBitmap);
        oldCanvas.setAllowSimplifyClip(false);
        opBitmap.eraseColor(SK_ColorWHITE);
        SkCanvas opCanvas(opBitmap);
        opCanvas.setAllowSimplifyClip(true);
        drawPict(pic, &oldCanvas, fScale);
        drawPict(pic, &opCanvas, fScale);
        if (fTestStep == kCompareBits) {
            fPixelError = similarBits(oldBitmap, opBitmap);
            int oldTime = timePict(pic, &oldCanvas);
            int opTime = timePict(pic, &opCanvas);
            fTime = SkTMax(0, oldTime - opTime);
        } else if (fTestStep == kEncodeFiles) {
            SkString pngStr = make_png_name(fFilename);
            const char* pngName = pngStr.c_str();
            writePict(oldBitmap, outOldDir, pngName);
            writePict(opBitmap, outOpDir, pngName);
        }
    }
finish:
    if (pic) {
        pic->unref();
    }
}

 static void killPicture(JNIEnv* env, jobject, jlong pictureHandle) {
     SkPicture* picture = reinterpret_cast<SkPicture*>(pictureHandle);
     SkASSERT(picture);
     picture->unref();
 }

    virtual void HandleMessage(const pp::Var& var_message) {
        // Receive a message from javascript.
        if (var_message.is_string()) {
            SkString msg(var_message.AsString().c_str());
            if (msg.startsWith("init")) {
            } else if (msg.startsWith("LoadSKP")) {
                size_t startIndex = strlen("LoadSKP");
                size_t dataSize = msg.size()/sizeof(char) - startIndex;
                SkBase64 decodedData;
                decodedData.decode(msg.c_str() + startIndex, dataSize);
                size_t decodedSize = 3 * (dataSize / 4);
                SkDebugf("Got size: %d\n", decodedSize);
                if (!decodedData.getData()) {
                    SkDebugf("Failed to decode SKP\n");
                    return;
                }
                SkMemoryStream pictureStream(decodedData.getData(), decodedSize);
                SkPicture* picture = SkPicture::CreateFromStream(&pictureStream);
                if (NULL == picture) {
                    SkDebugf("Failed to create SKP.\n");
                    return;
                }
                fDebugger.loadPicture(picture);
                picture->unref();

                // Set up the command list.
                SkTArray<SkString>* commands = fDebugger.getDrawCommandsAsStrings();
                PostMessage("ClearCommands");
                for (int i = 0; i < commands->count(); ++i) {
                    SkString addCommand("AddCommand:");
                    addCommand.append((*commands)[i]);
                    PostMessage(addCommand.c_str());
                }
                PostMessage("UpdateCommands");

                // Set the overview text.
                SkString overviewText;
                fDebugger.getOverviewText(NULL, 0.0, &overviewText, 1);
                overviewText.prepend("SetOverview:");
                PostMessage(overviewText.c_str());

                // Draw the SKP.
                if (!fFlushLoopRunning) {
                    Paint();
                }
            } else if (msg.startsWith("CommandSelected:")) {
                size_t startIndex = strlen("CommandSelected:");
                int index = atoi(msg.c_str() + startIndex);
                fDebugger.setIndex(index);
                if (!fFlushLoopRunning) {
                    Paint();
                }
            } else if (msg.startsWith("Rewind")) {
                fCanvas->clear(SK_ColorWHITE);
                fDebugger.setIndex(0);
                if (!fFlushLoopRunning) {
                    Paint();
                }
            } else if (msg.startsWith("StepBack")) {
                fCanvas->clear(SK_ColorWHITE);
                int currentIndex = fDebugger.index();
                if (currentIndex > 1) {
                    fDebugger.setIndex(currentIndex - 1);
                    if (!fFlushLoopRunning) {
                        Paint();
                    }
                }
            } else if (msg.startsWith("Pause")) {
                // TODO(borenet)
            } else if (msg.startsWith("StepForward")) {
                int currentIndex = fDebugger.index();
                if (currentIndex < fDebugger.getSize() -1) {
                    fDebugger.setIndex(currentIndex + 1);
                    if (!fFlushLoopRunning) {
                        Paint();
                    }
                }
            } else if (msg.startsWith("Play")) {
                fDebugger.setIndex(fDebugger.getSize() - 1);
                if (!fFlushLoopRunning) {
                    Paint();
                }
            }
        }
    }

 ~TilingView() {
     fTextPicture->unref();
 }