void onDraw(SkCanvas* canvas) override { auto cf = SkColorFilter::MakeModeFilter(SK_ColorGREEN, SkXfermode::kSrc_Mode); sk_sp<SkImageFilter> filters[] = { SkColorFilterImageFilter::Make(std::move(cf), nullptr), SkBlurImageFilter::Make(2.0f, 2.0f, nullptr), SkDropShadowImageFilter::Make( 10.0f, 5.0f, 3.0f, 3.0f, SK_ColorBLUE, SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode, nullptr), }; SkIRect clipBounds[] { { -20, -20, 100, 100 }, { 0, 0, 75, 75 }, { 20, 20, 100, 100 }, { -20, -20, 50, 50 }, { 20, 20, 50, 50 }, }; SkImageInfo info = SkImageInfo::MakeN32(100, 100, kPremul_SkAlphaType); SkScalar MARGIN = SkIntToScalar(40); SkScalar DX = info.width() + MARGIN; SkScalar DY = info.height() + MARGIN; canvas->translate(MARGIN, MARGIN); sk_sp<SkSurface> surface = canvas->makeSurface(info); if (!surface) { surface = SkSurface::MakeRaster(info); } sk_tool_utils::draw_checkerboard(surface->getCanvas()); sk_sp<SkImage> source = surface->makeImageSnapshot(); for (auto clipBound : clipBounds) { canvas->save(); for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) { SkIRect subset = SkIRect::MakeXYWH(25, 25, 50, 50); SkIRect outSubset; SkIPoint offset; sk_sp<SkImage> result = source->makeWithFilter(filters[i].get(), subset, clipBound, &outSubset, &offset); SkASSERT(result); SkASSERT(source->isTextureBacked() == result->isTextureBacked()); result = result->makeSubset(outSubset); canvas->drawImage(result.get(), SkIntToScalar(offset.fX), SkIntToScalar(offset.fY)); show_bounds(canvas, SkIRect::MakeXYWH(offset.x(), offset.y(), outSubset.width(), outSubset.height()), clipBound); canvas->translate(DX, 0); } canvas->restore(); canvas->translate(0, DY); } }
void onDraw(SkCanvas* canvas) override { SkPaint paint; paint.setAntiAlias(true); paint.setSubpixelText(true); paint.setTextSize(100); paint.setStyle(SkPaint::kStroke_Style); paint.setTextScaleX(fScaleX); paint.setTextSkewX(fSkewX); const SkColor boundsColors[2] = { SK_ColorRED, SK_ColorBLUE }; SkFontMgr* fm = fFM; int count = SkMin32(fm->countFamilies(), 32); int index = 0; SkScalar x = 0, y = 0; canvas->translate(80, 120); for (int i = 0; i < count; ++i) { SkAutoTUnref<SkFontStyleSet> set(fm->createStyleSet(i)); for (int j = 0; j < set->count(); ++j) { SkSafeUnref(paint.setTypeface(set->createTypeface(j))); if (paint.getTypeface()) { show_bounds(canvas, paint, x, y, boundsColors[index & 1]); index += 1; x += 160; if (0 == (index % 6)) { x = 0; y += 160; } if (index >= 30) { return; } } } } }