C++ SkBitmap::getPixels方法代码示例

static jobject android_media_MediaMetadataRetriever_getFrameAtTime(JNIEnv *env, jobject thiz, jlong timeUs, jint option)
{
    ALOGV("getFrameAtTime: %lld us option: %d", timeUs, option);
    MediaMetadataRetriever* retriever = getRetriever(env, thiz);
    if (retriever == 0) {
        jniThrowException(env, "java/lang/IllegalStateException", "No retriever available");
        return NULL;
    }

    // Call native method to retrieve a video frame
    VideoFrame *videoFrame = NULL;
    sp<IMemory> frameMemory = retriever->getFrameAtTime(timeUs, option);
    if (frameMemory != 0) {  // cast the shared structure to a VideoFrame object
        videoFrame = static_cast<VideoFrame *>(frameMemory->pointer());
    }
    if (videoFrame == NULL) {
        ALOGE("getFrameAtTime: videoFrame is a NULL pointer");
        return NULL;
    }

    ALOGV("Dimension = %dx%d and bytes = %d",
          videoFrame->mDisplayWidth,
          videoFrame->mDisplayHeight,
          videoFrame->mSize);

    jobject config = env->CallStaticObjectMethod(
                         fields.configClazz,
                         fields.createConfigMethod,
                         SkBitmap::kRGB_565_Config);

    size_t width, height;
    bool swapWidthAndHeight = false;
    if (videoFrame->mRotationAngle == 90 || videoFrame->mRotationAngle == 270) {
        width = videoFrame->mHeight;
        height = videoFrame->mWidth;
        swapWidthAndHeight = true;
    } else {
        width = videoFrame->mWidth;
        height = videoFrame->mHeight;
    }

    jobject jBitmap = env->CallStaticObjectMethod(
                          fields.bitmapClazz,
                          fields.createBitmapMethod,
                          width,
                          height,
                          config);

    SkBitmap *bitmap =
        (SkBitmap *) env->GetLongField(jBitmap, fields.nativeBitmap);

    bitmap->lockPixels();
    rotate((uint16_t*)bitmap->getPixels(),
           (uint16_t*)((char*)videoFrame + sizeof(VideoFrame)),
           videoFrame->mWidth,
           videoFrame->mHeight,
           videoFrame->mRotationAngle);
    bitmap->unlockPixels();

    if (videoFrame->mDisplayWidth  != videoFrame->mWidth ||
            videoFrame->mDisplayHeight != videoFrame->mHeight) {
        size_t displayWidth = videoFrame->mDisplayWidth;
        size_t displayHeight = videoFrame->mDisplayHeight;
        if (swapWidthAndHeight) {
            displayWidth = videoFrame->mDisplayHeight;
            displayHeight = videoFrame->mDisplayWidth;
        }
        ALOGV("Bitmap dimension is scaled from %dx%d to %dx%d",
              width, height, displayWidth, displayHeight);
        jobject scaledBitmap = env->CallStaticObjectMethod(fields.bitmapClazz,
                               fields.createScaledBitmapMethod,
                               jBitmap,
                               displayWidth,
                               displayHeight,
                               true);
        return scaledBitmap;
    }

    return jBitmap;
}

        SkPoint pt = {10 * SK_Scalar1, 10 * SK_Scalar1};
        SkScalar small = 1 / (500 * SK_Scalar1);

        m.mapPoints(&pt, 1);
        path.addCircle(pt.fX, pt.fY, small);
        canvas->drawPath(path, paint);

        pt.set(30 * SK_Scalar1, 10 * SK_Scalar1);
        m.mapPoints(&pt, 1);
        SkRect rect = {pt.fX - small, pt.fY - small,
                       pt.fX + small, pt.fY + small};
        canvas->drawRect(rect, paint);

        SkBitmap bmp;
        bmp.allocN32Pixels(2, 2);
        uint32_t* pixels = reinterpret_cast<uint32_t*>(bmp.getPixels());
        pixels[0] = SkPackARGB32(0xFF, 0xFF, 0x00, 0x00);
        pixels[1] = SkPackARGB32(0xFF, 0x00, 0xFF, 0x00);
        pixels[2] = SkPackARGB32(0x80, 0x00, 0x00, 0x00);
        pixels[3] = SkPackARGB32(0xFF, 0x00, 0x00, 0xFF);
        pt.set(30 * SK_Scalar1, 30 * SK_Scalar1);
        m.mapPoints(&pt, 1);
        SkMatrix s;
        s.reset();
        s.setScale(SK_Scalar1 / 1000, SK_Scalar1 / 1000);
        SkShader* shader = SkShader::CreateBitmapShader(
                                            bmp,
                                            SkShader::kRepeat_TileMode,
                                            SkShader::kRepeat_TileMode,
                                            &s);
        paint.setShader(shader)->unref();

//.........这里部分代码省略.........
    }

    if (frameToDecode == fDisplayFrame.fIndex) {
        if (animationEnded) {
            return this->finish();
        }
        return fCurrentFrameDuration;
    }

    for (Frame* frame : { &fRestoreFrame, &fDecodingFrame }) {
        if (frameToDecode == frame->fIndex) {
            using std::swap;
            swap(fDisplayFrame, *frame);
            if (animationEnded) {
                return this->finish();
            }
            return fCurrentFrameDuration;
        }
    }

    // The following code makes an effort to avoid overwriting a frame that will
    // be used again. If frame |i| is_restore_previous, frame |i+1| will not
    // depend on frame |i|, so do not overwrite frame |i-1|, which may be needed
    // for frame |i+1|.
    // We could be even smarter about which frames to save by looking at the
    // entire dependency chain.
    SkCodec::Options options;
    options.fFrameIndex = frameToDecode;
    if (frameInfo.fRequiredFrame == SkCodec::kNoFrame) {
        if (is_restore_previous(frameInfo.fDisposalMethod)) {
            // frameToDecode will be discarded immediately after drawing, so
            // do not overwrite a frame which could possibly be used in the
            // future.
            if (fDecodingFrame.fIndex != SkCodec::kNoFrame &&
                    !is_restore_previous(fDecodingFrame.fDisposalMethod)) {
                using std::swap;
                swap(fDecodingFrame, fRestoreFrame);
            }
        }
    } else {
        auto validPriorFrame = [&frameInfo, &frameToDecode](const Frame& frame) {
            if (SkCodec::kNoFrame == frame.fIndex ||
                    is_restore_previous(frame.fDisposalMethod)) {
                return false;
            }

            return frame.fIndex >= frameInfo.fRequiredFrame && frame.fIndex < frameToDecode;
        };
        if (validPriorFrame(fDecodingFrame)) {
            if (is_restore_previous(frameInfo.fDisposalMethod)) {
                // fDecodingFrame is a good frame to use for this one, but we
                // don't want to overwrite it.
                fDecodingFrame.copyTo(&fRestoreFrame);
            }
            options.fPriorFrame = fDecodingFrame.fIndex;
        } else if (validPriorFrame(fDisplayFrame)) {
            if (!fDisplayFrame.copyTo(&fDecodingFrame)) {
                SkCodecPrintf("Failed to allocate pixels for frame\n");
                return this->finish();
            }
            options.fPriorFrame = fDecodingFrame.fIndex;
        } else if (validPriorFrame(fRestoreFrame)) {
            if (!is_restore_previous(frameInfo.fDisposalMethod)) {
                using std::swap;
                swap(fDecodingFrame, fRestoreFrame);
            } else if (!fRestoreFrame.copyTo(&fDecodingFrame)) {
                SkCodecPrintf("Failed to restore frame\n");
                return this->finish();
            }
            options.fPriorFrame = fDecodingFrame.fIndex;
        }
    }

    auto alphaType = kOpaque_SkAlphaType == frameInfo.fAlphaType ?
                     kOpaque_SkAlphaType : kPremul_SkAlphaType;
    auto info = fDecodeInfo.makeAlphaType(alphaType);
    SkBitmap* dst = &fDecodingFrame.fBitmap;
    if (!fDecodingFrame.init(info, Frame::OnInit::kRestoreIfNecessary)) {
        return this->finish();
    }

    auto result = fCodec->codec()->getPixels(dst->info(), dst->getPixels(), dst->rowBytes(),
                                             &options);
    if (result != SkCodec::kSuccess) {
        SkCodecPrintf("error %i, frame %i of %i\n", result, frameToDecode, fFrameCount);
        return this->finish();
    }

    fDecodingFrame.fIndex = frameToDecode;
    fDecodingFrame.fDisposalMethod = frameInfo.fDisposalMethod;

    using std::swap;
    swap(fDecodingFrame, fDisplayFrame);
    fDisplayFrame.fBitmap.notifyPixelsChanged();

    if (animationEnded) {
        return this->finish();
    }
    return fCurrentFrameDuration;
}

    // static
    SkBitmap ImageOperations::ResizeBasic(const SkBitmap& source,
        ResizeMethod method,
        int dest_width, int dest_height,
        const SkIRect& dest_subset)
    {
        // 确保枚举值合法.
        SkASSERT(((RESIZE_FIRST_QUALITY_METHOD<=method) &&
            (method<=RESIZE_LAST_QUALITY_METHOD)) ||
            ((RESIZE_FIRST_ALGORITHM_METHOD<=method) &&
            (method<=RESIZE_LAST_ALGORITHM_METHOD)));

        // 用于计算函数执行时间, 方便查看是否有问题.
        base::TimeTicks resize_start = base::TimeTicks::Now();

        SkIRect dest = { 0, 0, dest_width, dest_height };
        DCHECK(dest.contains(dest_subset)) <<
            "The supplied subset does not fall within the destination image.";

        // 如果源和目的大小都是0(0*0 0*N N*0), 返回一个空位图.
        if(source.width()<1 || source.height()<1 ||
            dest_width<1 || dest_height<1)
        {
            return SkBitmap();
        }

        method = ResizeMethodToAlgorithmMethod(method);
        // Check that we deal with an "algorithm methods" from this point onward.
        SkASSERT((ImageOperations::RESIZE_FIRST_ALGORITHM_METHOD<=method) &&
            (method<=ImageOperations::RESIZE_LAST_ALGORITHM_METHOD));

        SkAutoLockPixels locker(source);

        ResizeFilter filter(method, source.width(), source.height(),
            dest_width, dest_height, dest_subset);

        // Get a source bitmap encompassing this touched area. We construct the
        // offsets and row strides such that it looks like a new bitmap, while
        // referring to the old data.
        const uint8* source_subset =
            reinterpret_cast<const uint8*>(source.getPixels());

        // Convolve into the result.
        base::CPU cpu;
        SkBitmap result;
        result.setConfig(SkBitmap::kARGB_8888_Config,
            dest_subset.width(), dest_subset.height());
        result.allocPixels();
        BGRAConvolve2D(source_subset, static_cast<int>(source.rowBytes()),
            !source.isOpaque(), filter.x_filter(), filter.y_filter(),
            static_cast<int>(result.rowBytes()),
            static_cast<unsigned char*>(result.getPixels()),
            cpu.has_sse2());

        // Preserve the "opaque" flag for use as an optimization later.
        result.setIsOpaque(source.isOpaque());

        base::TimeDelta delta = base::TimeTicks::Now() - resize_start;
        UMA_HISTOGRAM_TIMES("Image.ResampleMS", delta);

        return result;
    }

//.........这里部分代码省略.........
			fileBuf += sizeof(float)*boneAnim->mCount;
			memcpy((float*)boneAnim->mAnimMat[0].Pointer(), fileBuf, sizeof(float)*boneAnim->mCount*16);
			fileBuf += sizeof(float)*boneAnim->mCount*16;
			mBoneMatData.push_back(boneAnim);
		}
	}
	else if(gloHeader->animType == KEYFRMANIM)
	{
		mAnimSize = gloHeader->numAnim;

		for(int anim = 0; anim < mAnimSize; anim++)
		{
			AnimationBin *animObj = new AnimationBin(); 

			memcpy(animObj, fileBuf, sizeof(AnimationBin));
			fileBuf += sizeof(AnimationBin);
			animObj->mKeyTrans = new float[animObj->mCount*16]; 
			memcpy(animObj->mKeyTrans, fileBuf, sizeof(float)*animObj->mCount*16);
			fileBuf += sizeof(float)*animObj->mCount*16;
			mAnimBinList.push_back(animObj);
		}
	}
	else if(gloHeader->animType == NOANIMATION)
	{
		//cout<<"no animation found"<<endl;
	}
	fclose(fin);
	delete[] freeBuf;
	delete gloHeader; 



	// Load textures using skia
	SkImageDecoder::Mode mode = SkImageDecoder::kDecodePixels_Mode;
	SkBitmap::Config prefConfig = SkBitmap::kARGB_8888_Config;

	for(unsigned int i = 0; i < mImageList.size();i++) {
		ImageTex *imgObj = mImageList.itemAt(i);

		SkBitmap* bm = new SkBitmap();
		if(NULL == bm) {
			VR_LOGE("Skia bitmap allocation failed for scene textures\n");
		}

		if(SkImageDecoder::DecodeFile(imgObj->fileName, bm, prefConfig, mode, NULL))
		{

			GLuint texId;
			glGenTextures(1, &texId);
			glBindTexture(GL_TEXTURE_2D, texId);

			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

			/* load texture */

#ifdef USE_COMPRESSED_TEXTURE	
			SkCompressedImageRef *ref = static_cast<SkCompressedImageRef *>(bm->pixelRef());
			glCompressedTexImage2D(GL_TEXTURE_2D, 0,/*GL_COMPRESSED_RGB8_ETC2*/0x9274, ref->getWidth(), ref->getHeight(), 0, ref->getPixelsByteSize(), ref->pixels());

#else
			glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, bm->width(), bm->height(), 0, GL_RGBA, GL_UNSIGNED_BYTE, (unsigned char *)bm->getPixels());
#endif
			/*load compressed texture */


			imgObj->mTexId = texId;

		}else {
			VR_LOGE("Loading the scene texture file [%s] : failed\n", imgObj->fileName);
		}

		if(bm){
			delete bm;
			bm = 0;
		}

	}

	for(unsigned int i = 0; i < mGeometryList.size(); i++)
	{
		Geometry *geom = mGeometryList.itemAt(i);
		for(unsigned int j = 0; j < geom->mMeshList.size(); j++)
		{
			Mesh *mesh = geom->mMeshList.itemAt(j);
			ImageTex *imgObj = mImageList.itemAt(mesh->mImgObjIndex);
			mesh->mTexId= imgObj->mTexId;
			imgObj = 0;

		}
		geom = 0;
	}

	

	return true;

}

static void generateMask(const SkMask& mask, const SkPath& path,
                         const SkMaskGamma::PreBlend& maskPreBlend) {
    SkPaint paint;

    int srcW = mask.fBounds.width();
    int srcH = mask.fBounds.height();
    int dstW = srcW;
    int dstH = srcH;
    int dstRB = mask.fRowBytes;

    SkMatrix matrix;
    matrix.setTranslate(-SkIntToScalar(mask.fBounds.fLeft),
                        -SkIntToScalar(mask.fBounds.fTop));

    SkBitmap::Config config = SkBitmap::kA8_Config;
    paint.setAntiAlias(SkMask::kBW_Format != mask.fFormat);
    switch (mask.fFormat) {
        case SkMask::kBW_Format:
            dstRB = 0;  // signals we need a copy
            break;
        case SkMask::kA8_Format:
            break;
        case SkMask::kLCD16_Format:
        case SkMask::kLCD32_Format:
            // TODO: trigger off LCD orientation
            dstW = 4*dstW - 8;
            matrix.setTranslate(-SkIntToScalar(mask.fBounds.fLeft + 1),
                                -SkIntToScalar(mask.fBounds.fTop));
            matrix.postScale(SkIntToScalar(4), SK_Scalar1);
            dstRB = 0;  // signals we need a copy
            break;
        default:
            SkDEBUGFAIL("unexpected mask format");
    }

    SkRasterClip clip;
    clip.setRect(SkIRect::MakeWH(dstW, dstH));

    SkBitmap bm;
    bm.setConfig(config, dstW, dstH, dstRB);

    if (0 == dstRB) {
        if (!bm.allocPixels()) {
            // can't allocate offscreen, so empty the mask and return
            sk_bzero(mask.fImage, mask.computeImageSize());
            return;
        }
        bm.lockPixels();
    } else {
        bm.setPixels(mask.fImage);
    }
    sk_bzero(bm.getPixels(), bm.getSafeSize());

    SkDraw  draw;
    draw.fRC    = &clip;
    draw.fClip  = &clip.bwRgn();
    draw.fMatrix = &matrix;
    draw.fBitmap = &bm;
    draw.drawPath(path, paint);

    switch (mask.fFormat) {
        case SkMask::kBW_Format:
            packA8ToA1(mask, bm.getAddr8(0, 0), bm.rowBytes());
            break;
        case SkMask::kA8_Format:
            if (maskPreBlend.isApplicable()) {
                applyLUTToA8Mask(mask, maskPreBlend.fG);
            }
            break;
        case SkMask::kLCD16_Format:
            if (maskPreBlend.isApplicable()) {
                pack4xHToLCD16<true>(bm, mask, maskPreBlend);
            } else {
                pack4xHToLCD16<false>(bm, mask, maskPreBlend);
            }
            break;
        case SkMask::kLCD32_Format:
            if (maskPreBlend.isApplicable()) {
                pack4xHToLCD32<true>(bm, mask, maskPreBlend);
            } else {
                pack4xHToLCD32<false>(bm, mask, maskPreBlend);
            }
            break;
        default:
            break;
    }
}

static void check(skiatest::Reporter* r,
                  const char path[],
                  SkISize size,
                  bool supportsScanlineDecoding,
                  bool supportsSubsetDecoding) {
    SkAutoTDelete<SkStream> stream(resource(path));
    if (!stream) {
        SkDebugf("Missing resource '%s'\n", path);
        return;
    }
    SkAutoTDelete<SkCodec> codec(SkCodec::NewFromStream(stream.detach()));
    if (!codec) {
        ERRORF(r, "Unable to decode '%s'", path);
        return;
    }

    // This test is used primarily to verify rewinding works properly.  Using kN32 allows
    // us to test this without the added overhead of creating different bitmaps depending
    // on the color type (ex: building a color table for kIndex8).  DM is where we test
    // decodes to all possible destination color types.
    SkImageInfo info = codec->getInfo().makeColorType(kN32_SkColorType);
    REPORTER_ASSERT(r, info.dimensions() == size);
    SkBitmap bm;
    bm.allocPixels(info);
    SkAutoLockPixels autoLockPixels(bm);
    SkCodec::Result result =
        codec->getPixels(info, bm.getPixels(), bm.rowBytes(), NULL, NULL, NULL);
    REPORTER_ASSERT(r, result == SkCodec::kSuccess);

    SkMD5::Digest digest;
    md5(bm, &digest);

    bm.eraseColor(SK_ColorYELLOW);

    result =
        codec->getPixels(info, bm.getPixels(), bm.rowBytes(), NULL, NULL, NULL);

    REPORTER_ASSERT(r, result == SkCodec::kSuccess);
    // verify that re-decoding gives the same result.
    compare_to_good_digest(r, digest, bm);

    stream.reset(resource(path));
    SkAutoTDelete<SkScanlineDecoder> scanlineDecoder(
            SkScanlineDecoder::NewFromStream(stream.detach()));
    if (supportsScanlineDecoding) {
        bm.eraseColor(SK_ColorYELLOW);
        REPORTER_ASSERT(r, scanlineDecoder);

        REPORTER_ASSERT(r, scanlineDecoder->start(info) == SkCodec::kSuccess);

        for (int y = 0; y < info.height(); y++) {
            result = scanlineDecoder->getScanlines(bm.getAddr(0, y), 1, 0);
            REPORTER_ASSERT(r, result == SkCodec::kSuccess);
        }
        // verify that scanline decoding gives the same result.
        compare_to_good_digest(r, digest, bm);
    } else {
        REPORTER_ASSERT(r, !scanlineDecoder);
    }

    // The rest of this function tests decoding subsets, and will decode an arbitrary number of
    // random subsets.
    // Do not attempt to decode subsets of an image of only once pixel, since there is no
    // meaningful subset.
    if (size.width() * size.height() == 1) {
        return;
    }

    SkRandom rand;
    SkIRect subset;
    SkCodec::Options opts;
    opts.fSubset = &subset;
    for (int i = 0; i < 5; i++) {
        subset = generate_random_subset(&rand, size.width(), size.height());
        SkASSERT(!subset.isEmpty());
        const bool supported = codec->getValidSubset(&subset);
        REPORTER_ASSERT(r, supported == supportsSubsetDecoding);

        SkImageInfo subsetInfo = info.makeWH(subset.width(), subset.height());
        SkBitmap bm;
        bm.allocPixels(subsetInfo);
        const SkCodec::Result result = codec->getPixels(bm.info(), bm.getPixels(), bm.rowBytes(),
                                                        &opts, NULL, NULL);

        if (supportsSubsetDecoding) {
            REPORTER_ASSERT(r, result == SkCodec::kSuccess);
            // Webp is the only codec that supports subsets, and it will have modified the subset
            // to have even left/top.
            REPORTER_ASSERT(r, SkIsAlign2(subset.fLeft) && SkIsAlign2(subset.fTop));
        } else {
            // No subsets will work.
            REPORTER_ASSERT(r, result == SkCodec::kUnimplemented);
        }
    }
}

status_t BootAnimation::initTexture(void* buffer, size_t len)
{
    //StopWatch watch("blah");

    SkBitmap bitmap;
    SkMemoryStream  stream(buffer, len);
    SkImageDecoder* codec = SkImageDecoder::Factory(&stream);
    if (codec) {
        codec->setDitherImage(false);
        codec->decode(&stream, &bitmap,
                SkBitmap::kARGB_8888_Config,
                SkImageDecoder::kDecodePixels_Mode);
        delete codec;
    }

    // ensure we can call getPixels(). No need to call unlock, since the
    // bitmap will go out of scope when we return from this method.
    bitmap.lockPixels();

    const int w = bitmap.width();
    const int h = bitmap.height();
    const void* p = bitmap.getPixels();

    GLint crop[4] = { 0, h, w, -h };
    int tw = 1 << (31 - __builtin_clz(w));
    int th = 1 << (31 - __builtin_clz(h));
    if (tw < w) tw <<= 1;
    if (th < h) th <<= 1;

    switch (bitmap.getConfig()) {
        case SkBitmap::kARGB_8888_Config:
            if (tw != w || th != h) {
                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tw, th, 0, GL_RGBA,
                        GL_UNSIGNED_BYTE, 0);
                glTexSubImage2D(GL_TEXTURE_2D, 0,
                        0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, p);
            } else {
                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tw, th, 0, GL_RGBA,
                        GL_UNSIGNED_BYTE, p);
            }
            break;

        case SkBitmap::kRGB_565_Config:
            if (tw != w || th != h) {
                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, tw, th, 0, GL_RGB,
                        GL_UNSIGNED_SHORT_5_6_5, 0);
                glTexSubImage2D(GL_TEXTURE_2D, 0,
                        0, 0, w, h, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, p);
            } else {
                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, tw, th, 0, GL_RGB,
                        GL_UNSIGNED_SHORT_5_6_5, p);
            }
            break;
        default:
            break;
    }

    glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES, crop);

    return NO_ERROR;
}

bool SkMorphologyImageFilter::filterImageGeneric(SkMorphologyImageFilter::Proc procX,
                                                 SkMorphologyImageFilter::Proc procY,
                                                 Proxy* proxy,
                                                 const SkBitmap& source,
                                                 const Context& ctx,
                                                 SkBitmap* dst,
                                                 SkIPoint* offset) const {
    SkBitmap src = source;
    SkIPoint srcOffset = SkIPoint::Make(0, 0);
    if (!this->filterInput(0, proxy, source, ctx, &src, &srcOffset)) {
        return false;
    }

    if (src.colorType() != kN32_SkColorType) {
        return false;
    }

    SkIRect bounds;
    if (!this->applyCropRect(this->mapContext(ctx), proxy, src, &srcOffset, &bounds, &src)) {
        return false;
    }

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

    SkVector radius = SkVector::Make(SkIntToScalar(this->radius().width()),
                                     SkIntToScalar(this->radius().height()));
    ctx.ctm().mapVectors(&radius, 1);
    int width = SkScalarFloorToInt(radius.fX);
    int height = SkScalarFloorToInt(radius.fY);

    if (width < 0 || height < 0) {
        return false;
    }

    SkIRect srcBounds = bounds;
    srcBounds.offset(-srcOffset);

    if (width == 0 && height == 0) {
        src.extractSubset(dst, srcBounds);
        offset->fX = bounds.left();
        offset->fY = bounds.top();
        return true;
    }

    SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
    if (!device) {
        return false;
    }
    *dst = device->accessBitmap(false);
    SkAutoLockPixels alp_dst(*dst);

    if (width > 0 && height > 0) {
        SkAutoTUnref<SkBaseDevice> tempDevice(proxy->createDevice(dst->width(), dst->height()));
        if (!tempDevice) {
            return false;
        }
        SkBitmap temp = tempDevice->accessBitmap(false);
        SkAutoLockPixels alp_temp(temp);
        callProcX(procX, src, &temp, width, srcBounds);
        SkIRect tmpBounds = SkIRect::MakeWH(srcBounds.width(), srcBounds.height());
        callProcY(procY, temp, dst, height, tmpBounds);
    } else if (width > 0) {
        callProcX(procX, src, dst, width, srcBounds);
    } else if (height > 0) {
        callProcY(procY, src, dst, height, srcBounds);
    }
    offset->fX = bounds.left();
    offset->fY = bounds.top();
    return true;
}

static void bitmap_to_pdf_pixels(const SkBitmap& bitmap, SkWStream* out) {
    if (!bitmap.getPixels()) {
        size_t size = pixel_count(bitmap) *
                      pdf_color_component_count(bitmap.colorType());
        fill_stream(out, '\x00', size);
        return;
    }
    SkBitmap copy;
    const SkBitmap& bm = not4444(bitmap, &copy);
    SkAutoLockPixels autoLockPixels(bm);
    switch (bm.colorType()) {
        case kN32_SkColorType: {
            SkASSERT(3 == pdf_color_component_count(bitmap.colorType()));
            SkAutoTMalloc<uint8_t> scanline(3 * bm.width());
            for (int y = 0; y < bm.height(); ++y) {
                const SkPMColor* src = bm.getAddr32(0, y);
                uint8_t* dst = scanline.get();
                for (int x = 0; x < bm.width(); ++x) {
                    SkPMColor color = *src++;
                    U8CPU alpha = SkGetPackedA32(color);
                    if (alpha != SK_AlphaTRANSPARENT) {
                        pmcolor_to_rgb24(color, dst);
                    } else {
                        get_neighbor_avg_color(bm, x, y, dst);
                    }
                    dst += 3;
                }
                out->write(scanline.get(), 3 * bm.width());
            }
            return;
        }
        case kRGB_565_SkColorType: {
            SkASSERT(3 == pdf_color_component_count(bitmap.colorType()));
            SkAutoTMalloc<uint8_t> scanline(3 * bm.width());
            for (int y = 0; y < bm.height(); ++y) {
                const uint16_t* src = bm.getAddr16(0, y);
                uint8_t* dst = scanline.get();
                for (int x = 0; x < bm.width(); ++x) {
                    U16CPU color565 = *src++;
                    *dst++ = SkPacked16ToR32(color565);
                    *dst++ = SkPacked16ToG32(color565);
                    *dst++ = SkPacked16ToB32(color565);
                }
                out->write(scanline.get(), 3 * bm.width());
            }
            return;
        }
        case kAlpha_8_SkColorType:
            SkASSERT(1 == pdf_color_component_count(bitmap.colorType()));
            fill_stream(out, '\x00', pixel_count(bm));
            return;
        case kGray_8_SkColorType:
        case kIndex_8_SkColorType:
            SkASSERT(1 == pdf_color_component_count(bitmap.colorType()));
            // these two formats need no transformation to serialize.
            for (int y = 0; y < bm.height(); ++y) {
                out->write(bm.getAddr8(0, y), bm.width());
            }
            return;
        case kUnknown_SkColorType:
        case kARGB_4444_SkColorType:
        default:
            SkDEBUGFAIL("unexpected color type");
    }
}

bool PNGImageEncoder::encode(const SkBitmap& bitmap, Vector<unsigned char>* output)
{
    SkAutoLockPixels bitmapLock(bitmap);

    if (bitmap.config() != SkBitmap::kARGB_8888_Config)
        return false; // Only support 32 bit/pixel skia bitmaps.

    return encodePixels(IntSize(bitmap.width(), bitmap.height()), static_cast<unsigned char*>(bitmap.getPixels()), true, output);
}

/*
 *  High quality is implemented by performing up-right scale-only filtering and then
 *  using bilerp for any remaining transformations.
 */
bool SkDefaultBitmapControllerState::processHQRequest(const SkBitmapProvider& provider) {
    if (fQuality != kHigh_SkFilterQuality) {
        return false;
    }
    
    // Our default return state is to downgrade the request to Medium, w/ or w/o setting fBitmap
    // to a valid bitmap. If we succeed, we will set this to Low instead.
    fQuality = kMedium_SkFilterQuality;
    
    if (kN32_SkColorType != provider.info().colorType() || !cache_size_okay(provider, fInvMatrix) ||
        fInvMatrix.hasPerspective())
    {
        return false; // can't handle the reqeust
    }
    
    SkScalar invScaleX = fInvMatrix.getScaleX();
    SkScalar invScaleY = fInvMatrix.getScaleY();
    if (fInvMatrix.getType() & SkMatrix::kAffine_Mask) {
        SkSize scale;
        if (!fInvMatrix.decomposeScale(&scale)) {
            return false;
        }
        invScaleX = scale.width();
        invScaleY = scale.height();
    }
    if (SkScalarNearlyEqual(invScaleX, 1) && SkScalarNearlyEqual(invScaleY, 1)) {
        return false; // no need for HQ
    }

#ifndef SK_SUPPORT_LEGACY_HQ_DOWNSAMPLING
    if (invScaleX > 1 || invScaleY > 1) {
        return false; // only use HQ when upsampling
    }
#endif
    
    const int dstW = SkScalarRoundToScalar(provider.width() / invScaleX);
    const int dstH = SkScalarRoundToScalar(provider.height() / invScaleY);
    const SkBitmapCacheDesc desc = provider.makeCacheDesc(dstW, dstH);

    if (!SkBitmapCache::FindWH(desc, &fResultBitmap)) {
        SkBitmap orig;
        if (!provider.asBitmap(&orig)) {
            return false;
        }
        SkAutoPixmapUnlock src;
        if (!orig.requestLock(&src)) {
            return false;
        }
        if (!SkBitmapScaler::Resize(&fResultBitmap, src.pixmap(), kHQ_RESIZE_METHOD,
                                    dstW, dstH, SkResourceCache::GetAllocator())) {
            return false; // we failed to create fScaledBitmap
        }
        
        SkASSERT(fResultBitmap.getPixels());
        fResultBitmap.setImmutable();
        if (!provider.isVolatile()) {
            if (SkBitmapCache::AddWH(desc, fResultBitmap)) {
                provider.notifyAddedToCache();
            }
        }
    }
    
    SkASSERT(fResultBitmap.getPixels());
    
    fInvMatrix.postScale(SkIntToScalar(dstW) / provider.width(),
                         SkIntToScalar(dstH) / provider.height());
    fQuality = kLow_SkFilterQuality;
    return true;
}