C++ SkBitmap::allocPixels方法代码示例

    OvalTestView() {
        fSize.set(SK_Scalar1, SK_Scalar1);

        fBitmap.setConfig(SkBitmap::kARGB_8888_Config, kILimit, kILimit);
        fBitmap.allocPixels();

        fInsideColor = SkPreMultiplyColor(SK_ColorRED);
        fOutsideColor = SkPreMultiplyColor(SK_ColorGREEN);

        this->setBGColor(0xFFDDDDDD);
    }

    virtual void onPreDraw() {
        SkBitmap bm;

        if (kIndex_8_SkColorType == fColorType) {
            bm.allocPixels(SkImageInfo::MakeN32(W, H, fAlphaType));
        } else {
            bm.allocPixels(SkImageInfo::Make(W, H, fColorType, fAlphaType));
        }
        bm.eraseColor(kOpaque_SkAlphaType == fAlphaType ? SK_ColorBLACK : 0);

        onDrawIntoBitmap(bm);

        if (kIndex_8_SkColorType == fColorType) {
            convertToIndex666(bm, &fBitmap, fAlphaType);
        } else {
            fBitmap = bm;
        }

        fBitmap.setIsVolatile(fIsVolatile);
    }

// Verifies that the deferred canvas triggers a flush when its memory
// limit is exceeded
static void TestDeferredCanvasMemoryLimit(skiatest::Reporter* reporter) {
    SkBitmap store;
    store.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
    store.allocPixels();
    MockDevice mockDevice(store);
    SkDeferredCanvas canvas(&mockDevice);
    canvas.setMaxRecordingStorage(160000);

    SkBitmap sourceImage;
    // 100 by 100 image, takes 40,000 bytes in memory
    sourceImage.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
    sourceImage.allocPixels();

    for (int i = 0; i < 5; i++) {
        sourceImage.notifyPixelsChanged(); // to force re-serialization
        canvas.drawBitmap(sourceImage, 0, 0, NULL);
    }

    REPORTER_ASSERT(reporter, mockDevice.fDrawBitmapCallCount == 4);
}

static void TestBitmapHeap(skiatest::Reporter* reporter) {
    // Create a bitmap shader.
    SkBitmap bm;
    bm.setConfig(SkBitmap::kARGB_8888_Config, 2, 2);
    bm.allocPixels();
    bm.eraseColor(SK_ColorRED);
    uint32_t* pixel = bm.getAddr32(1,0);
    *pixel = SK_ColorBLUE;

    SkShader* bitmapShader = SkShader::CreateBitmapShader(bm, SkShader::kRepeat_TileMode,
                                                          SkShader::kRepeat_TileMode);
    SkAutoTUnref<SkShader> aur(bitmapShader);

    // Flatten, storing it in the bitmap heap.
    SkBitmapHeap heap(1, 1);
    SkChunkFlatController controller(1024);
    controller.setBitmapStorage(&heap);
    FlatDictionary dictionary(&controller);

    // Dictionary and heap start off empty.
    REPORTER_ASSERT(reporter, heap.count() == 0);
    REPORTER_ASSERT(reporter, dictionary.count() == 0);

    heap.deferAddingOwners();
    int index = dictionary.find(*bitmapShader);
    heap.endAddingOwnersDeferral(true);

    // The dictionary and heap should now each have one entry.
    REPORTER_ASSERT(reporter, 1 == index);
    REPORTER_ASSERT(reporter, heap.count() == 1);
    REPORTER_ASSERT(reporter, dictionary.count() == 1);

    // The bitmap entry's refcount should be 1, then 0 after release.
    SkBitmapHeapEntry* entry = heap.getEntry(0);
    REPORTER_ASSERT(reporter, SkBitmapHeapTester::GetRefCount(entry) == 1);

    entry->releaseRef();
    REPORTER_ASSERT(reporter, SkBitmapHeapTester::GetRefCount(entry) == 0);

    // Now clear out the heap, after which it should be empty.
    heap.freeMemoryIfPossible(~0U);
    REPORTER_ASSERT(reporter, heap.count() == 0);

    // Now attempt to flatten the shader again.
    heap.deferAddingOwners();
    index = dictionary.find(*bitmapShader);
    heap.endAddingOwnersDeferral(false);

    // The dictionary should report the same index since the new entry is identical.
    // The bitmap heap should contain the bitmap, but with no references.
    REPORTER_ASSERT(reporter, 1 == index);
    REPORTER_ASSERT(reporter, heap.count() == 1);
    REPORTER_ASSERT(reporter, SkBitmapHeapTester::GetRefCount(heap.getEntry(0)) == 0);
}

jobject createBitmap(JNIEnv * env ,jobject  obj,jint w,jint h,SkBitmap::Config config,jboolean hasAlpha,int isMuttable)
{
SkBitmap* bm = new SkBitmap();
bm->setConfig(config, w, h);
bm->setIsOpaque(!hasAlpha);
bm->allocPixels();
bm->eraseColor(0);
//__android_log_print(ANDROID_LOG_DEBUG, "NativeBitmap", "Created bitmap %d has width = %d, height = %d",bm, bm->width(), bm->height());
jobject result = GraphicsJNI::createBitmap(env,bm,isMuttable,NULL,-1);
return result;
}

static void TestDeferredCanvasBitmapShaderNoLeak(skiatest::Reporter* reporter) {
    // This is a regression test for crbug.com/155875
    // This test covers a code path that inserts bitmaps into the bitmap heap through the
    // flattening of SkBitmapProcShaders. The refcount in the bitmap heap is maintained through
    // the flattening and unflattening of the shader.
    SkBitmap store;
    store.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
    store.allocPixels();
    SkDevice device(store);
    SkDeferredCanvas canvas(&device);
    // test will fail if nbIterations is not in sync with
    // BITMAPS_TO_KEEP in SkGPipeWrite.cpp
    const int nbIterations = 5;
    size_t bytesAllocated = 0;
    for(int pass = 0; pass < 2; ++pass) {
        for(int i = 0; i < nbIterations; ++i) {
            SkPaint paint;
            SkBitmap paintPattern;
            paintPattern.setConfig(SkBitmap::kARGB_8888_Config, 10, 10);
            paintPattern.allocPixels();
            paint.setShader(SkNEW_ARGS(SkBitmapProcShader,
                (paintPattern, SkShader::kClamp_TileMode, SkShader::kClamp_TileMode)))->unref();
            canvas.drawPaint(paint);
            canvas.flush();

            // In the first pass, memory allocation should be monotonically increasing as
            // the bitmap heap slots fill up.  In the second pass memory allocation should be
            // stable as bitmap heap slots get recycled.
            size_t newBytesAllocated = canvas.storageAllocatedForRecording();
            if (pass == 0) {
                REPORTER_ASSERT(reporter, newBytesAllocated > bytesAllocated);
                bytesAllocated = newBytesAllocated;
            } else {
                REPORTER_ASSERT(reporter, newBytesAllocated == bytesAllocated);
            }
        }
    }
    // All cached resources should be evictable since last canvas call was flush()
    canvas.freeMemoryIfPossible(~0);
    REPORTER_ASSERT(reporter, 0 == canvas.storageAllocatedForRecording());
}

static void test_cache(skiatest::Reporter* reporter,
                       GrContext* context,
                       SkCanvas* canvas) {
    const SkIRect size = SkIRect::MakeWH(gWidth, gHeight);

    SkBitmap src;
    src.setConfig(SkBitmap::kARGB_8888_Config, size.width(), size.height());
    src.allocPixels();
    src.eraseColor(SK_ColorBLACK);
    size_t srcSize = src.getSize();

    size_t initialCacheSize = context->getGpuTextureCacheBytes();

    int oldMaxNum;
    size_t oldMaxBytes;
    context->getTextureCacheLimits(&oldMaxNum, &oldMaxBytes);

    // Set the cache limits so we can fit 10 "src" images and the
    // max number of textures doesn't matter
    size_t maxCacheSize = initialCacheSize + 10*srcSize;
    context->setTextureCacheLimits(1000, maxCacheSize);

    SkBitmap readback;
    readback.setConfig(SkBitmap::kARGB_8888_Config, size.width(), size.height());
    readback.allocPixels();

    for (int i = 0; i < 100; ++i) {
        canvas->drawBitmap(src, 0, 0);
        canvas->readPixels(size, &readback);

        // "modify" the src texture
        src.notifyPixelsChanged();

        size_t curCacheSize = context->getGpuTextureCacheBytes();

        // we should never go over the size limit
        REPORTER_ASSERT(reporter, curCacheSize <= maxCacheSize);
    }

    context->setTextureCacheLimits(oldMaxNum, oldMaxBytes);
}

static void testOne(const SkString& filename) {
#if DEBUG_SHOW_TEST_NAME
    SkString testName(filename);
    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);
#endif
    SkString path;
    make_filepath(&path, pictDir, filename);
    SkFILEStream stream(path.c_str());
    if (!stream.isValid()) {
        return;
    }
    SkPicture* pic = SkPicture::CreateFromStream(&stream, &SkImageDecoder::DecodeMemory);
    if (!pic) {
        SkDebugf("unable to decode %s\n", filename.c_str());
        return;
    }
    int width = pic->width();
    int height = pic->height();
    SkBitmap bitmap;
    bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height);
    bool success = bitmap.allocPixels();
    if (!success) {
        SkDebugf("unable to allocate bitmap for %s\n", filename.c_str());
        return;
    }
    SkCanvas canvas(bitmap);
    SkString pngName(filename);
    pngName.remove(pngName.size() - 3, 3);
    pngName.append("png");
    for (int i = 0; i < 2; ++i) {
        bool useOp = i ? true : false;
        canvas.setAllowSimplifyClip(useOp);
        pic->draw(&canvas);
        SkString outFile;
        make_filepath(&outFile, useOp ? outSkpClipDir : outOldClipDir, pngName);
        SkImageEncoder::EncodeFile(outFile.c_str(), bitmap, SkImageEncoder::kPNG_Type, 100);
    }
    SkDELETE(pic);
}

static SkBitmap createBitmapWithSpace(const SkBitmap& bitmap, int spaceWidth, int spaceHeight)
{
    SkImageInfo info = bitmap.info();
    info = SkImageInfo::Make(info.width() + spaceWidth, info.height() + spaceHeight, info.colorType(), kPremul_SkAlphaType);

    SkBitmap result;
    result.allocPixels(info);
    result.eraseColor(SK_ColorTRANSPARENT);
    bitmap.copyPixelsTo(reinterpret_cast<uint8_t*>(result.getPixels()), result.rowBytes() * result.height(), result.rowBytes());

    return result;
}

void TextureCache::uploadLoFiTexture(bool resize, const SkBitmap* bitmap,
        uint32_t width, uint32_t height) {
    SkBitmap rgbaBitmap;
    rgbaBitmap.allocPixels(SkImageInfo::MakeN32(width, height, bitmap->alphaType()));
    rgbaBitmap.eraseColor(0);

    SkCanvas canvas(rgbaBitmap);
    canvas.drawBitmap(*bitmap, 0.0f, 0.0f, nullptr);

    uploadToTexture(resize, GL_RGBA, rgbaBitmap.rowBytesAsPixels(), rgbaBitmap.bytesPerPixel(),
            width, height, GL_UNSIGNED_BYTE, rgbaBitmap.getPixels());
}

    static void TestUnalignedQuery(skiatest::Reporter* reporter) {
        // Use SkTileGridPicture to generate a SkTileGrid with a helper
        SkTileGridPicture picture(10, 10, 20, 20);
        SkRect rect1 = SkRect::MakeXYWH(SkIntToScalar(0), SkIntToScalar(0),
                                        SkIntToScalar(8), SkIntToScalar(8));
        SkRect rect2 = SkRect::MakeXYWH(SkIntToScalar(11), SkIntToScalar(11),
                                        SkIntToScalar(1), SkIntToScalar(1));
        SkCanvas* canvas = picture.beginRecording(20, 20, SkPicture::kOptimizeForClippedPlayback_RecordingFlag);
        SkPaint paint;
        canvas->drawRect(rect1, paint);
        canvas->drawRect(rect2, paint);
        picture.endRecording();

        SkBitmap store;
        store.setConfig(SkBitmap::kARGB_8888_Config, 1, 1);
        store.allocPixels();

        // Test parts of top-left tile
        {
            SkDevice device(store);
            MockCanvas mockCanvas(&device);
            picture.draw(&mockCanvas);
            REPORTER_ASSERT(reporter, 1 == mockCanvas.fRects.count());
            REPORTER_ASSERT(reporter, rect1 == mockCanvas.fRects[0]);
        }
        {
            SkDevice device(store);
            MockCanvas mockCanvas(&device);
            mockCanvas.translate(SkFloatToScalar(-7.99f), SkFloatToScalar(-7.99f));
            picture.draw(&mockCanvas);
            REPORTER_ASSERT(reporter, 1 == mockCanvas.fRects.count());
            REPORTER_ASSERT(reporter, rect1 == mockCanvas.fRects[0]);
        }
        // Corner overlap
        {
            SkDevice device(store);
            MockCanvas mockCanvas(&device);
            mockCanvas.translate(SkFloatToScalar(-9.5f), SkFloatToScalar(-9.5f));
            picture.draw(&mockCanvas);
            REPORTER_ASSERT(reporter, 2 == mockCanvas.fRects.count());
            REPORTER_ASSERT(reporter, rect1 == mockCanvas.fRects[0]);
            REPORTER_ASSERT(reporter, rect2 == mockCanvas.fRects[1]);
        }
        // Intersect bottom right tile, but does not overlap rect 2
        {
            SkDevice device(store);
            MockCanvas mockCanvas(&device);
            mockCanvas.translate(SkFloatToScalar(-16.0f), SkFloatToScalar(-16.0f));
            picture.draw(&mockCanvas);
            REPORTER_ASSERT(reporter, 1 == mockCanvas.fRects.count());
            REPORTER_ASSERT(reporter, rect2 == mockCanvas.fRects[0]);
        }
    }

bool SkBlurImageFilter::onFilterImage(Proxy* proxy,
                                      const SkBitmap& source, const SkMatrix& ctm,
                                      SkBitmap* dst, SkIPoint* offset) {
    SkBitmap src = this->getInputResult(proxy, source, ctm, offset);
    if (src.config() != SkBitmap::kARGB_8888_Config) {
        return false;
    }

    SkAutoLockPixels alp(src);
    if (!src.getPixels()) {
        return false;
    }

    dst->setConfig(src.config(), src.width(), src.height());
    dst->allocPixels();
    int kernelSizeX, kernelSizeX3, lowOffsetX, highOffsetX;
    int kernelSizeY, kernelSizeY3, lowOffsetY, highOffsetY;
    getBox3Params(fSigma.width(), &kernelSizeX, &kernelSizeX3, &lowOffsetX, &highOffsetX);
    getBox3Params(fSigma.height(), &kernelSizeY, &kernelSizeY3, &lowOffsetY, &highOffsetY);

    if (kernelSizeX < 0 || kernelSizeY < 0) {
        return false;
    }

    if (kernelSizeX == 0 && kernelSizeY == 0) {
        src.copyTo(dst, dst->config());
        return true;
    }

    SkBitmap temp;
    temp.setConfig(dst->config(), dst->width(), dst->height());
    if (!temp.allocPixels()) {
        return false;
    }

    if (kernelSizeX > 0 && kernelSizeY > 0) {
        boxBlurX(src,  &temp, kernelSizeX,  lowOffsetX, highOffsetX);
        boxBlurY(temp, dst,   kernelSizeY,  lowOffsetY, highOffsetY);
        boxBlurX(*dst, &temp, kernelSizeX,  highOffsetX,  lowOffsetX);
        boxBlurY(temp, dst,   kernelSizeY,  highOffsetY,  lowOffsetY);
        boxBlurX(*dst, &temp, kernelSizeX3, highOffsetX, highOffsetX);
        boxBlurY(temp, dst,   kernelSizeY3, highOffsetY, highOffsetY);
    } else if (kernelSizeX > 0) {
        boxBlurX(src,  dst,   kernelSizeX,  lowOffsetX, highOffsetX);
        boxBlurX(*dst, &temp, kernelSizeX,  highOffsetX,  lowOffsetX);
        boxBlurX(temp, dst,   kernelSizeX3, highOffsetX, highOffsetX);
    } else if (kernelSizeY > 0) {
        boxBlurY(src,  dst,   kernelSizeY,  lowOffsetY, highOffsetY);
        boxBlurY(*dst, &temp, kernelSizeY,  highOffsetY, lowOffsetY);
        boxBlurY(temp, dst,   kernelSizeY3, highOffsetY, highOffsetY);
    }
    return true;
}

GraphicsContext* GraphicsContext::createOffscreenContext(int width, int height)
{
    SkBitmap bitmap;
    bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height);
    bitmap.allocPixels();
    bitmap.eraseColor(0);

    PlatformGraphicsContextSkia* pgc =
        new PlatformGraphicsContextSkia(new SkCanvas(bitmap), true);
    GraphicsContext* ctx = new GraphicsContext(pgc);
    return ctx;
}

static void TestDeferredCanvasBitmapSizeThreshold(skiatest::Reporter* reporter) {
    SkBitmap store;
    store.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
    store.allocPixels();

    SkBitmap sourceImage;
    // 100 by 100 image, takes 40,000 bytes in memory
    sourceImage.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
    sourceImage.allocPixels();

    // 1 under : should not store the image
    {
        SkDevice device(store);
        SkDeferredCanvas canvas(&device);
        canvas.setBitmapSizeThreshold(39999);
        canvas.drawBitmap(sourceImage, 0, 0, NULL);
        size_t newBytesAllocated = canvas.storageAllocatedForRecording();
        REPORTER_ASSERT(reporter, newBytesAllocated == 0);
    }

    // exact value : should store the image
    {
        SkDevice device(store);
        SkDeferredCanvas canvas(&device);
        canvas.setBitmapSizeThreshold(40000);
        canvas.drawBitmap(sourceImage, 0, 0, NULL);
        size_t newBytesAllocated = canvas.storageAllocatedForRecording();
        REPORTER_ASSERT(reporter, newBytesAllocated > 0);
    }

    // 1 over : should still store the image
    {
        SkDevice device(store);
        SkDeferredCanvas canvas(&device);
        canvas.setBitmapSizeThreshold(40001);
        canvas.drawBitmap(sourceImage, 0, 0, NULL);
        size_t newBytesAllocated = canvas.storageAllocatedForRecording();
        REPORTER_ASSERT(reporter, newBytesAllocated > 0);
    }
}

    void drawBG(SkCanvas* canvas)
    {
        canvas->drawColor(0xFFDDDDDD);
        return;

#if 0
        SkColorTable    ct;
        SkPMColor       colors[] = { SK_ColorRED, SK_ColorBLUE };
        ct.setColors(colors, 2);
        ct.setFlags(ct.getFlags() | SkColorTable::kColorsAreOpaque_Flag);

        SkBitmap        bm;
        bm.setConfig(SkBitmap::kIndex8_Config, 20, 20, 21);
        bm.setColorTable(&ct);
        bm.allocPixels();
        sk_memset16((uint16_t*)bm.getAddr8(0, 0), 0x0001, bm.rowBytes() * bm.height() / 2);
#endif
#if 0
        SkBitmap        bm;
        bm.setConfig(SkBitmap::kRGB_565_Config, 20, 20, 42);
        bm.allocPixels();
        sk_memset32((uint32_t*)bm.getAddr16(0, 0), 0x0000FFFF, bm.rowBytes() * bm.height() / 4);
#endif
#if 1
        SkBitmap        bm;
        bm.setConfig(SkBitmap::kARGB_8888_Config, 20, 20);
        bm.allocPixels();
        sk_memset32((uint32_t*)bm.getAddr32(0, 0), 0xFFDDDDDD, bm.rowBytes() * bm.height() / 4);
#endif

        SkPaint paint;

//        SkShader* shader = SkShader::CreateBitmapShader(bm, false, SkPaint::kBilinear_FilterType, SkShader::kRepeat_TileMode);
        SkPoint pts[] = { 0, 0, SkIntToScalar(100), SkIntToScalar(0) };
        SkColor colors[] = { SK_ColorBLACK, SK_ColorWHITE };
        SkShader* shader = SkGradientShader::CreateLinear(pts, colors, NULL, 2, SkShader::kMirror_TileMode);
        paint.setShader(shader)->unref();

        canvas->drawPaint(paint);
    }