| /* |
| * 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 "src/base/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(); |
| } |