void onDraw(SkCanvas* canvas) override {
canvas->clear(SK_ColorBLACK);
{
SkRect srcRect = SkRect::MakeXYWH(20, 20, 30, 30);
SkRect dstRect = SkRect::MakeXYWH(0, 10, 60, 60);
SkRect clipRect = SkRect::MakeXYWH(0, 0, 100, 100);
SkRect bounds;
fBitmap.getBounds(&bounds);
SkAutoTUnref<SkImageFilter> bitmapSource(SkBitmapSource::Create(fBitmap));
SkAutoTUnref<SkImageFilter> bitmapSourceSrcRect(SkBitmapSource::Create(fBitmap, srcRect, srcRect));
SkAutoTUnref<SkImageFilter> bitmapSourceSrcRectDstRect(SkBitmapSource::Create(fBitmap, srcRect, dstRect));
SkAutoTUnref<SkImageFilter> bitmapSourceDstRectOnly(SkBitmapSource::Create(fBitmap, bounds, dstRect));
// Draw an unscaled bitmap.
FillRectFiltered(canvas, clipRect, bitmapSource);
canvas->translate(SkIntToScalar(100), 0);
// Draw an unscaled subset of the source bitmap (srcRect -> srcRect).
FillRectFiltered(canvas, clipRect, bitmapSourceSrcRect);
canvas->translate(SkIntToScalar(100), 0);
// Draw a subset of the bitmap scaled to a destination rect (srcRect -> dstRect).
FillRectFiltered(canvas, clipRect, bitmapSourceSrcRectDstRect);
canvas->translate(SkIntToScalar(100), 0);
// Draw the entire bitmap scaled to a destination rect (bounds -> dstRect).
FillRectFiltered(canvas, clipRect, bitmapSourceDstRectOnly);
canvas->translate(SkIntToScalar(100), 0);
}
}
virtual void onDraw(SkCanvas* canvas) {
if (!fInitialized) {
this->make_bitmap();
fInitialized = true;
}
canvas->clear(0x00000000);
{
SkAutoTUnref<SkImageFilter> bitmapSource(new SkBitmapSource(fBitmap));
SkAutoTUnref<SkColorFilter> cf(SkColorFilter::CreateModeFilter(SK_ColorRED,
SkXfermode::kSrcIn_Mode));
SkAutoTUnref<SkImageFilter> blur(new SkBlurImageFilter(4.0f, 4.0f, bitmapSource));
SkAutoTUnref<SkImageFilter> erode(new SkErodeImageFilter(4, 4, blur));
SkAutoTUnref<SkImageFilter> color(SkColorFilterImageFilter::Create(cf, erode));
SkAutoTUnref<SkImageFilter> merge(new SkMergeImageFilter(blur, color));
SkPaint paint;
paint.setImageFilter(merge);
canvas->drawPaint(paint);
}
{
SkAutoTUnref<SkImageFilter> morph(new SkDilateImageFilter(5, 5));
SkScalar matrix[20] = { SK_Scalar1, 0, 0, 0, 0,
0, SK_Scalar1, 0, 0, 0,
0, 0, SK_Scalar1, 0, 0,
0, 0, 0, SkFloatToScalar(0.5f), 0 };
SkAutoTUnref<SkColorFilter> matrixFilter(new SkColorMatrixFilter(matrix));
SkAutoTUnref<SkImageFilter> colorMorph(SkColorFilterImageFilter::Create(matrixFilter, morph));
SkAutoTUnref<SkXfermode> mode(SkXfermode::Create(SkXfermode::kSrcOver_Mode));
SkAutoTUnref<SkImageFilter> blendColor(new SkXfermodeImageFilter(mode, colorMorph));
SkPaint paint;
paint.setImageFilter(blendColor);
canvas->drawBitmap(fBitmap, 100, 0, &paint);
}
}
void onDraw(SkCanvas* canvas) override {
canvas->clear(SK_ColorBLACK);
{
sk_sp<SkImageFilter> bitmapSource(SkImageSource::Make(fImage));
sk_sp<SkColorFilter> cf(SkColorFilter::MakeModeFilter(SK_ColorRED,
SkBlendMode::kSrcIn));
sk_sp<SkImageFilter> blur(SkBlurImageFilter::Make(4.0f, 4.0f, std::move(bitmapSource)));
sk_sp<SkImageFilter> erode(SkErodeImageFilter::Make(4, 4, blur));
sk_sp<SkImageFilter> color(SkColorFilterImageFilter::Make(std::move(cf),
std::move(erode)));
sk_sp<SkImageFilter> merge(SkMergeImageFilter::Make(blur, color,
SkBlendMode::kSrcOver));
SkPaint paint;
paint.setImageFilter(std::move(merge));
canvas->drawPaint(paint);
canvas->translate(SkIntToScalar(100), 0);
}
{
sk_sp<SkImageFilter> morph(SkDilateImageFilter::Make(5, 5, nullptr));
SkScalar matrix[20] = { SK_Scalar1, 0, 0, 0, 0,
0, SK_Scalar1, 0, 0, 0,
0, 0, SK_Scalar1, 0, 0,
0, 0, 0, 0.5f, 0 };
sk_sp<SkColorFilter> matrixFilter(SkColorFilter::MakeMatrixFilterRowMajor255(matrix));
sk_sp<SkImageFilter> colorMorph(SkColorFilterImageFilter::Make(std::move(matrixFilter),
std::move(morph)));
SkPaint paint;
paint.setImageFilter(SkXfermodeImageFilter::Make(SkBlendMode::kSrcOver,
std::move(colorMorph)));
DrawClippedImage(canvas, fImage.get(), paint);
canvas->translate(SkIntToScalar(100), 0);
}
{
SkScalar matrix[20] = { SK_Scalar1, 0, 0, 0, 0,
0, SK_Scalar1, 0, 0, 0,
0, 0, SK_Scalar1, 0, 0,
0, 0, 0, 0.5f, 0 };
sk_sp<SkColorFilter> matrixCF(SkColorFilter::MakeMatrixFilterRowMajor255(matrix));
sk_sp<SkImageFilter> matrixFilter(SkColorFilterImageFilter::Make(std::move(matrixCF),
nullptr));
sk_sp<SkImageFilter> offsetFilter(SkOffsetImageFilter::Make(10.0f, 10.f,
matrixFilter));
SkPaint paint;
paint.setImageFilter(
SkXfermodeImageFilter::MakeArithmetic(0, 1, 1, 0, true,
std::move(matrixFilter),
std::move(offsetFilter),
nullptr));
DrawClippedImage(canvas, fImage.get(), paint);
canvas->translate(SkIntToScalar(100), 0);
}
{
sk_sp<SkImageFilter> blur(SkBlurImageFilter::Make(SkIntToScalar(10),
SkIntToScalar(10),
nullptr));
SkImageFilter::CropRect cropRect(SkRect::MakeWH(SkIntToScalar(95), SkIntToScalar(100)));
SkPaint paint;
paint.setImageFilter(
SkXfermodeImageFilter::Make(SkBlendMode::kSrcIn, std::move(blur), nullptr,
&cropRect));
DrawClippedImage(canvas, fImage.get(), paint);
canvas->translate(SkIntToScalar(100), 0);
}
{
// Dilate -> matrix convolution.
// This tests that a filter using asFragmentProcessor (matrix
// convolution) correctly handles a non-zero source offset
// (supplied by the dilate).
sk_sp<SkImageFilter> dilate(SkDilateImageFilter::Make(5, 5, nullptr));
SkScalar kernel[9] = {
SkIntToScalar(-1), SkIntToScalar( -1 ), SkIntToScalar(-1),
SkIntToScalar(-1), SkIntToScalar( 7 ), SkIntToScalar(-1),
SkIntToScalar(-1), SkIntToScalar( -1 ), SkIntToScalar(-1),
};
SkISize kernelSize = SkISize::Make(3, 3);
SkScalar gain = 1.0f, bias = SkIntToScalar(0);
SkIPoint kernelOffset = SkIPoint::Make(1, 1);
auto tileMode = SkMatrixConvolutionImageFilter::kClamp_TileMode;
bool convolveAlpha = false;
sk_sp<SkImageFilter> convolve(SkMatrixConvolutionImageFilter::Make(kernelSize,
kernel,
gain,
bias,
kernelOffset,
tileMode,
convolveAlpha,
std::move(dilate)));
SkPaint paint;
paint.setImageFilter(std::move(convolve));
DrawClippedImage(canvas, fImage.get(), paint);
canvas->translate(SkIntToScalar(100), 0);
}
{
// Test that crop offsets are absolute, not relative to the parent's crop rect.
sk_sp<SkColorFilter> cf1(SkColorFilter::MakeModeFilter(SK_ColorBLUE,
SkBlendMode::kSrcIn));
sk_sp<SkColorFilter> cf2(SkColorFilter::MakeModeFilter(SK_ColorGREEN,
SkBlendMode::kSrcIn));
SkImageFilter::CropRect outerRect(SkRect::MakeXYWH(SkIntToScalar(10), SkIntToScalar(10),
SkIntToScalar(80), SkIntToScalar(80)));
SkImageFilter::CropRect innerRect(SkRect::MakeXYWH(SkIntToScalar(20), SkIntToScalar(20),
SkIntToScalar(60), SkIntToScalar(60)));
sk_sp<SkImageFilter> color1(SkColorFilterImageFilter::Make(std::move(cf1),
nullptr,
&outerRect));
sk_sp<SkImageFilter> color2(SkColorFilterImageFilter::Make(std::move(cf2),
std::move(color1),
&innerRect));
SkPaint paint;
paint.setImageFilter(std::move(color2));
paint.setColor(SK_ColorRED);
canvas->drawRect(SkRect::MakeXYWH(0, 0, 100, 100), paint);
canvas->translate(SkIntToScalar(100), 0);
}
}