C++ SkPaint::setColorFilter方法代码示例

SkPaint SkColorSpaceXformer::apply(const SkPaint& src) {
    const AutoCachePurge autoPurge(this);

    SkPaint dst = src;

    // All SkColorSpaces have the same black point.
    if (src.getColor() & 0xffffff) {
        dst.setColor(this->apply(src.getColor()));
    }

    if (auto shader = src.getShader()) {
        dst.setShader(this->apply(shader));
    }

    if (auto cf = src.getColorFilter()) {
        dst.setColorFilter(this->apply(cf));
    }

    if (auto looper = src.getDrawLooper()) {
        dst.setDrawLooper(looper->makeColorSpace(this));
    }

    if (auto imageFilter = src.getImageFilter()) {
        dst.setImageFilter(this->apply(imageFilter));
    }

    return dst;
}

    void onDraw(SkCanvas* canvas) override {
        SkLayerDrawLooper::Builder looperBuilder;
        {
            SkLayerDrawLooper::LayerInfo info;
            info.fPaintBits = SkLayerDrawLooper::kMaskFilter_Bit
                              | SkLayerDrawLooper::kColorFilter_Bit;
            info.fColorMode = SkXfermode::kSrc_Mode;
            info.fOffset = SkPoint::Make(SkIntToScalar(-1), SkIntToScalar(0));
            info.fPostTranslate = false;
            SkPaint* paint = looperBuilder.addLayerOnTop(info);
            SkMaskFilter* maskFilter = SkBlurMaskFilter::Create(
                    kNormal_SkBlurStyle,
                    SkBlurMask::ConvertRadiusToSigma(SK_ScalarHalf),
                    SkBlurMaskFilter::kHighQuality_BlurFlag);
            paint->setMaskFilter(maskFilter)->unref();
            SkColorFilter* colorFilter = SkColorFilter::CreateModeFilter(
                    sk_tool_utils::color_to_565(SK_ColorLTGRAY),
                    SkXfermode::kSrcIn_Mode);
            paint->setColorFilter(colorFilter)->unref();
            paint->setColor(sk_tool_utils::color_to_565(SK_ColorGRAY));
        }
        {
            SkLayerDrawLooper::LayerInfo info;
            looperBuilder.addLayerOnTop(info);
        }
        SkPaint paint;
        canvas->drawRect(fRRect.rect(), paint);

        paint.setLooper(looperBuilder.detachLooper())->unref();
        paint.setColor(SK_ColorCYAN);
        paint.setAntiAlias(true);

        canvas->drawRRect(fRRect, paint);
    }

    void onDraw(int loops, SkCanvas* canvas) override {
        SkLayerDrawLooper::Builder looperBuilder;
        {
            SkLayerDrawLooper::LayerInfo info;
            info.fPaintBits = SkLayerDrawLooper::kMaskFilter_Bit
                              | SkLayerDrawLooper::kColorFilter_Bit;
            info.fColorMode = (SK_XFERMODE_MODE_PARAM)SkBlendMode::kSrc;
            info.fOffset = SkPoint::Make(SkIntToScalar(-1), SkIntToScalar(0));
            info.fPostTranslate = false;
            SkPaint* paint = looperBuilder.addLayerOnTop(info);
            paint->setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle,
                                                        SkBlurMask::ConvertRadiusToSigma(0.5),
                                                        SkBlurMaskFilter::kHighQuality_BlurFlag));
            paint->setColorFilter(SkColorFilter::MakeModeFilter(SK_ColorLTGRAY,
                                                                SkBlendMode::kSrcIn));
            paint->setColor(SK_ColorGRAY);
        }
        {
            SkLayerDrawLooper::LayerInfo info;
            looperBuilder.addLayerOnTop(info);
        }
        SkPaint dullPaint;
        dullPaint.setAntiAlias(true);

        SkPaint loopedPaint;
        loopedPaint.setLooper(looperBuilder.detach());
        loopedPaint.setAntiAlias(true);
        loopedPaint.setColor(SK_ColorCYAN);

        for (int i = 0; i < loops; i++) {
            canvas->drawRect(fRRect.rect(), dullPaint);
            canvas->drawRRect(fRRect, loopedPaint);
        }
    }

bool SkColorFilterImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& source,
                                             const Context& ctx,
                                             SkBitmap* result,
                                             SkIPoint* offset) const {
    SkBitmap src = source;
    SkIPoint srcOffset = SkIPoint::Make(0, 0);
    if (getInput(0) && !getInput(0)->filterImage(proxy, source, ctx, &src, &srcOffset)) {
        return false;
    }

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

    SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
    if (NULL == device.get()) {
        return false;
    }
    SkCanvas canvas(device.get());
    SkPaint paint;

    paint.setXfermodeMode(SkXfermode::kSrc_Mode);
    paint.setColorFilter(fColorFilter);
    canvas.drawSprite(src, srcOffset.fX - bounds.fLeft, srcOffset.fY - bounds.fTop, &paint);

    *result = device.get()->accessBitmap(false);
    offset->fX = bounds.fLeft;
    offset->fY = bounds.fTop;
    return true;
}

void FEColorMatrix::applySoftware()
{
    ImageBuffer* resultImage = createImageBufferResult();
    if (!resultImage)
        return;

    FilterEffect* in = inputEffect(0);

    IntRect drawingRegion = drawingRegionOfInputImage(in->absolutePaintRect());

    SkAutoTUnref<SkColorFilter> filter(createColorFilter(m_type, m_values.data()));

    RefPtr<Image> image = in->asImageBuffer()->copyImage(DontCopyBackingStore);
    RefPtr<NativeImageSkia> nativeImage = image->nativeImageForCurrentFrame();
    if (!nativeImage)
        return;

    SkPaint paint;
    paint.setColorFilter(filter);
    paint.setXfermodeMode(SkXfermode::kSrc_Mode);
    resultImage->context()->drawBitmap(nativeImage->bitmap(), drawingRegion.x(), drawingRegion.y(), &paint);

    if (affectsTransparentPixels()) {
        IntRect fullRect = IntRect(IntPoint(), absolutePaintRect().size());
        resultImage->context()->clipOut(drawingRegion);
        resultImage->context()->fillRect(fullRect, Color(m_values[4], m_values[9], m_values[14], m_values[19]));
    }
    return;
}

bool SkColorFilterImageFilter::onFilterImageDeprecated(Proxy* proxy, const SkBitmap& source,
                                                       const Context& ctx,
                                                       SkBitmap* result,
                                                       SkIPoint* offset) const {
    SkBitmap src = source;
    SkIPoint srcOffset = SkIPoint::Make(0, 0);
    if (!this->filterInputDeprecated(0, proxy, source, ctx, &src, &srcOffset)) {
        return false;
    }

    SkIRect bounds;
    SkIRect srcBounds = src.bounds();
    srcBounds.offset(srcOffset);
    if (!this->applyCropRect(ctx, srcBounds, &bounds)) {
        return false;
    }

    SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
    if (nullptr == device.get()) {
        return false;
    }
    SkCanvas canvas(device.get());
    SkPaint paint;

    paint.setXfermodeMode(SkXfermode::kSrc_Mode);
    paint.setColorFilter(fColorFilter);
    canvas.drawBitmap(src, SkIntToScalar(srcOffset.fX - bounds.fLeft),
                           SkIntToScalar(srcOffset.fY - bounds.fTop), &paint);

    *result = device.get()->accessBitmap(false);
    offset->fX = bounds.fLeft;
    offset->fY = bounds.fTop;
    return true;
}

void OsmAnd::MapRasterizer_P::rasterizePolylineShadow(
    const Context& context,
    SkCanvas& canvas,
    const SkPath& path,
    SkPaint& paint,
    const ColorARGB shadowColor,
    const float shadowRadius)
{
    if (context.shadowMode == MapPresentationEnvironment::ShadowMode::BlurShadow && shadowRadius > 0.0f)
    {
        // simply draw shadow? difference from option 3 ?
        paint.setLooper(SkBlurDrawLooper::Create(
            shadowColor.toSkColor(),
            SkBlurMaskFilter::ConvertRadiusToSigma(shadowRadius),
            0,
            0))->unref();
        canvas.drawPath(path, paint);
    }
    else if (context.shadowMode == MapPresentationEnvironment::ShadowMode::SolidShadow && shadowRadius > 0.0f)
    {
        paint.setLooper(nullptr);
        paint.setStrokeWidth(paint.getStrokeWidth() + shadowRadius * 2);
        paint.setColorFilter(SkColorFilter::CreateModeFilter(
            shadowColor.toSkColor(),
            SkXfermode::kSrcIn_Mode))->unref();
        canvas.drawPath(path, paint);
    }
}

bool SkColorFilterImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& source,
                                             const SkMatrix& matrix,
                                             SkBitmap* result,
                                             SkIPoint* loc) {
    SkBitmap src = source;
    if (getInput(0) && !getInput(0)->filterImage(proxy, source, matrix, &src, loc)) {
        return false;
    }

    SkIRect bounds;
    src.getBounds(&bounds);
    if (!this->applyCropRect(&bounds, matrix)) {
        return false;
    }

    SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), bounds.height()));
    if (NULL == device.get()) {
        return false;
    }
    SkCanvas canvas(device.get());
    SkPaint paint;

    paint.setXfermodeMode(SkXfermode::kSrc_Mode);
    paint.setColorFilter(fColorFilter);
    canvas.drawSprite(src, -bounds.fLeft, -bounds.fTop, &paint);

    *result = device.get()->accessBitmap(false);
    loc->fX += bounds.fLeft;
    loc->fY += bounds.fTop;
    return true;
}

void FEComponentTransfer::applySoftware()
{
    FilterEffect* in = inputEffect(0);
    ImageBuffer* resultImage = createImageBufferResult();
    if (!resultImage)
        return;

    RefPtr<Image> image = in->asImageBuffer()->copyImage(DontCopyBackingStore);
    RefPtr<NativeImageSkia> nativeImage = image->nativeImageForCurrentFrame();
    if (!nativeImage)
        return;

    unsigned char rValues[256], gValues[256], bValues[256], aValues[256];
    getValues(rValues, gValues, bValues, aValues);

    IntRect destRect = drawingRegionOfInputImage(in->absolutePaintRect());
    SkPaint paint;
    paint.setColorFilter(SkTableColorFilter::CreateARGB(aValues, rValues, gValues, bValues))->unref();
    paint.setXfermodeMode(SkXfermode::kSrc_Mode);
    resultImage->context()->drawBitmap(nativeImage->bitmap(), destRect.x(), destRect.y(), &paint);

    if (affectsTransparentPixels()) {
        IntRect fullRect = IntRect(IntPoint(), absolutePaintRect().size());
        resultImage->context()->clipOut(destRect);
        resultImage->context()->fillRect(fullRect, Color(rValues[0], gValues[0], bValues[0], aValues[0]));
    }
}

DEF_SIMPLE_GM_BG(overdraw_canvas,       canvas, WIDTH, HEIGHT, SK_ColorWHITE) {
    // Set up the overdraw canvas.
    SkImageInfo offscreenInfo = SkImageInfo::MakeA8(WIDTH, HEIGHT);
    sk_sp<SkSurface> offscreen = SkSurface::MakeRaster(offscreenInfo);
    auto c = offscreen->getCanvas();

    SkOverdrawCanvas overdrawCanvas(c);

    overdrawCanvas.drawRect(SkRect::MakeLTRB(10, 10, 200, 200), SkPaint());
    overdrawCanvas.drawRect(SkRect::MakeLTRB(20, 20, 190, 190), SkPaint());
    overdrawCanvas.drawRect(SkRect::MakeLTRB(30, 30, 180, 180), SkPaint());
    overdrawCanvas.drawRect(SkRect::MakeLTRB(40, 40, 170, 170), SkPaint());
    overdrawCanvas.drawRect(SkRect::MakeLTRB(50, 50, 160, 160), SkPaint());
    overdrawCanvas.drawRect(SkRect::MakeLTRB(60, 60, 150, 150), SkPaint());

    char text[] = "Ae_p";
    overdrawCanvas.drawSimpleText(text, 4, SkTextEncoding::kUTF8, 300, 300, SkFont(), SkPaint());

    sk_sp<SkImage> counts = offscreen->makeImageSnapshot();

    // Draw overdraw colors to the canvas.  The color filter will convert counts to colors.
    SkPaint paint;
    paint.setColorFilter(SkOverdrawColorFilter::Make(kOverdrawColors));
    canvas->drawImage(counts.get(), 0.0f, 0.0f, &paint);
    canvas->drawString("This is some text:", 180, 300, SkFont(), SkPaint());
}

void FEDropShadow::applySoftware()
{
    FilterEffect* in = inputEffect(0);

    ImageBuffer* resultImage = createImageBufferResult();
    if (!resultImage)
        return;

    Filter* filter = this->filter();
    FloatSize blurRadius(filter->applyHorizontalScale(m_stdX), filter->applyVerticalScale(m_stdY));
    FloatSize offset(filter->applyHorizontalScale(m_dx), filter->applyVerticalScale(m_dy));

    FloatRect drawingRegion = drawingRegionOfInputImage(in->absolutePaintRect());
    GraphicsContext* resultContext = resultImage->context();
    ASSERT(resultContext);

    Color color = adaptColorToOperatingColorSpace(m_shadowColor.combineWithAlpha(m_shadowOpacity));
    SkAutoTUnref<SkImageFilter> blurFilter(SkBlurImageFilter::Create(blurRadius.width(), blurRadius.height()));
    SkAutoTUnref<SkColorFilter> colorFilter(SkColorFilter::CreateModeFilter(color.rgb(), SkXfermode::kSrcIn_Mode));
    SkPaint paint;
    paint.setImageFilter(blurFilter.get());
    paint.setColorFilter(colorFilter.get());
    paint.setXfermodeMode(SkXfermode::kSrcOver_Mode);
    RefPtr<Image> image = in->asImageBuffer()->copyImage(DontCopyBackingStore);

    RefPtr<NativeImageSkia> nativeImage = image->nativeImageForCurrentFrame();

    if (!nativeImage)
        return;

    resultContext->drawBitmap(nativeImage->bitmap(), drawingRegion.x() + offset.width(), drawingRegion.y() + offset.height(), &paint);
    resultContext->drawBitmap(nativeImage->bitmap(), drawingRegion.x(), drawingRegion.y());
}

 void test(int loops, SkCanvas* canvas) {
     SkPaint paint;
     for (int i = 0; i < loops; i++) {
         SkAutoTUnref<SkColorFilter> colorCube(
             SkColorCubeFilter::Create(fCubeData, fCubeDimension));
         paint.setColorFilter(colorCube);
         canvas->drawBitmap(fBitmap, 0, 0, &paint);
     }
 }

static void initPaint(SkPaint& paint) {
    // Make sure the paint is opaque, color, alpha, filter, etc.
    // will be applied later when compositing the alpha8 texture
    paint.setColor(SK_ColorBLACK);
    paint.setAlpha(255);
    paint.setColorFilter(NULL);
    paint.setMaskFilter(NULL);
    paint.setShader(NULL);
    SkXfermode* mode = SkXfermode::Create(SkXfermode::kSrc_Mode);
    SkSafeUnref(paint.setXfermode(mode));
}

sk_sp<SkSpecialImage> SkDropShadowImageFilter::onFilterImage(SkSpecialImage* source,
                                                             const Context& ctx,
                                                             SkIPoint* offset) const {
    SkIPoint inputOffset = SkIPoint::Make(0, 0);
    sk_sp<SkSpecialImage> input(this->filterInput(0, source, ctx, &inputOffset));
    if (!input) {
        return nullptr;
    }

    const SkIRect inputBounds = SkIRect::MakeXYWH(inputOffset.x(), inputOffset.y(),
                                                  input->width(), input->height());
    SkIRect bounds;
    if (!this->applyCropRect(ctx, inputBounds, &bounds)) {
        return nullptr;
    }

    const SkImageInfo info = SkImageInfo::MakeN32(bounds.width(), bounds.height(),
                                                  kPremul_SkAlphaType);
    sk_sp<SkSpecialSurface> surf(source->makeSurface(info));
    if (!surf) {
        return nullptr;
    }

    SkCanvas* canvas = surf->getCanvas();
    SkASSERT(canvas);

    canvas->clear(0x0);

    SkVector sigma = SkVector::Make(fSigmaX, fSigmaY);
    ctx.ctm().mapVectors(&sigma, 1);
    sigma.fX = SkMaxScalar(0, sigma.fX);
    sigma.fY = SkMaxScalar(0, sigma.fY);

    SkAutoTUnref<SkImageFilter> blurFilter(SkBlurImageFilter::Create(sigma.fX, sigma.fY));
    SkPaint paint;
    paint.setImageFilter(blurFilter.get());
    paint.setColorFilter(SkColorFilter::MakeModeFilter(fColor, SkXfermode::kSrcIn_Mode));
    paint.setXfermodeMode(SkXfermode::kSrcOver_Mode);

    SkVector offsetVec = SkVector::Make(fDx, fDy);
    ctx.ctm().mapVectors(&offsetVec, 1);

    canvas->translate(SkIntToScalar(inputOffset.fX - bounds.fLeft),
                      SkIntToScalar(inputOffset.fY - bounds.fTop));
    input->draw(canvas, offsetVec.fX, offsetVec.fY, &paint);

    if (fShadowMode == kDrawShadowAndForeground_ShadowMode) {
        input->draw(canvas, 0, 0, nullptr);
    }
    offset->fX = bounds.fLeft;
    offset->fY = bounds.fTop;
    return surf->makeImageSnapshot();
}

static SkPaint make_paint() {
    SkPaint paint;
    if (fuzz->exhausted()) {
        return paint;
    }
    paint.setHinting(make_paint_hinting());
    paint.setAntiAlias(make_bool());
    paint.setDither(make_bool());
    paint.setLinearText(make_bool());
    paint.setSubpixelText(make_bool());
    paint.setLCDRenderText(make_bool());
    paint.setEmbeddedBitmapText(make_bool());
    paint.setAutohinted(make_bool());
    paint.setVerticalText(make_bool());
    paint.setFakeBoldText(make_bool());
    paint.setDevKernText(make_bool());
    paint.setFilterQuality(make_filter_quality());
    paint.setStyle(make_paint_style());
    paint.setColor(make_color());
    paint.setStrokeWidth(make_number(false));
    paint.setStrokeMiter(make_number(false));
    paint.setStrokeCap(make_paint_cap());
    paint.setStrokeJoin(make_paint_join());
    paint.setColorFilter(make_color_filter());
    paint.setBlendMode(make_blendmode());
    paint.setPathEffect(make_path_effect());
    paint.setMaskFilter(make_mask_filter());

    if (false) {
        // our validating buffer does not support typefaces yet, so skip this for now
        paint.setTypeface(SkTypeface::MakeFromName(make_font_name().c_str(),make_typeface_style()));
    }

    SkLayerRasterizer::Builder rasterizerBuilder;
    SkPaint paintForRasterizer;
    if (make_bool()) {
        paintForRasterizer = make_paint();
    }
    rasterizerBuilder.addLayer(paintForRasterizer);
    paint.setRasterizer(rasterizerBuilder.detach());
    paint.setImageFilter(make_image_filter());
    bool a, b, c;
    fuzz->next(&a, &b, &c);
    sk_sp<SkData> data(make_3Dlut(nullptr, a, b, c));
    paint.setTextAlign(make_paint_align());
    SkScalar d, e, f;
    fuzz->next(&d, &e, &f);
    paint.setTextSize(d);
    paint.setTextScaleX(e);
    paint.setTextSkewX(f);
    paint.setTextEncoding(make_paint_text_encoding());
    return paint;
}