/* * Copyright 2012 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "gm/gm.h" #include "include/core/SkBitmap.h" #include "include/core/SkCanvas.h" #include "include/core/SkColor.h" #include "include/core/SkFont.h" #include "include/core/SkImage.h" #include "include/core/SkImageFilter.h" #include "include/core/SkImageInfo.h" #include "include/core/SkPaint.h" #include "include/core/SkPixelRef.h" #include "include/core/SkRect.h" #include "include/core/SkRefCnt.h" #include "include/core/SkScalar.h" #include "include/core/SkTypeface.h" #include "include/effects/SkImageFilters.h" #include "include/utils/SkRandom.h" #include "tools/ToolUtils.h" #include <utility> #define WIDTH 500 #define HEIGHT 500 DEF_SIMPLE_GM_BG(imagemagnifier, canvas, WIDTH, HEIGHT, SK_ColorBLACK) { SkPaint filterPaint; filterPaint.setImageFilter( SkImageFilters::Magnifier( SkRect::MakeXYWH(SkIntToScalar(100), SkIntToScalar(100), SkIntToScalar(WIDTH / 2), SkIntToScalar(HEIGHT / 2)), 100, nullptr)); canvas->saveLayer(nullptr, &filterPaint); const char* str = "The quick brown fox jumped over the lazy dog."; SkRandom rand; SkFont font(ToolUtils::create_portable_typeface()); for (int i = 0; i < 25; ++i) { int x = rand.nextULessThan(WIDTH); int y = rand.nextULessThan(HEIGHT); SkPaint paint; paint.setColor(ToolUtils::color_to_565(rand.nextBits(24) | 0xFF000000)); font.setSize(rand.nextRangeScalar(0, 300)); canvas->drawString(str, SkIntToScalar(x), SkIntToScalar(y), font, paint); } canvas->restore(); } //////////////////////////////////////////////////////////////////////////////// #define WIDTH_HEIGHT 256 static sk_sp<SkImage> make_img() { SkBitmap bitmap; bitmap.allocN32Pixels(WIDTH_HEIGHT, WIDTH_HEIGHT); SkCanvas canvas(bitmap); canvas.clear(0x0); SkPaint paint; paint.setColor(SK_ColorBLUE); for (float pos = 0; pos < WIDTH_HEIGHT; pos += 16) { canvas.drawLine(0, pos, SkIntToScalar(WIDTH_HEIGHT), pos, paint); canvas.drawLine(pos, 0, pos, SkIntToScalar(WIDTH_HEIGHT), paint); } SkBitmap result; result.setInfo(SkImageInfo::MakeS32(WIDTH_HEIGHT, WIDTH_HEIGHT, kPremul_SkAlphaType)); result.setPixelRef(sk_ref_sp(bitmap.pixelRef()), 0, 0); return result.asImage(); } DEF_SIMPLE_GM_BG(imagemagnifier_cropped, canvas, WIDTH_HEIGHT, WIDTH_HEIGHT, SK_ColorBLACK) { sk_sp<SkImage> image(make_img()); sk_sp<SkImageFilter> imageSource(SkImageFilters::Image(std::move(image))); SkRect srcRect = SkRect::MakeWH(SkIntToScalar(WIDTH_HEIGHT-32), SkIntToScalar(WIDTH_HEIGHT-32)); srcRect.inset(64.0f, 64.0f); constexpr SkScalar kInset = 64.0f; // Crop out a 16 pixel ring around the result const SkIRect cropRect = SkIRect::MakeXYWH(16, 16, WIDTH_HEIGHT-32, WIDTH_HEIGHT-32); SkPaint filterPaint; filterPaint.setImageFilter(SkImageFilters::Magnifier( srcRect, kInset, std::move(imageSource), &cropRect)); canvas->saveLayer(nullptr, &filterPaint); canvas->restore(); }