| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm.h" |
| #include "SkCanvas.h" |
| #include "SkColorFilter.h" |
| #include "SkColorPriv.h" |
| #include "SkShader.h" |
| |
| #include "SkBlurImageFilter.h" |
| #include "SkColorMatrixFilter.h" |
| #include "SkDisplacementMapEffect.h" |
| #include "SkDropShadowImageFilter.h" |
| #include "SkGradientShader.h" |
| #include "SkImageSource.h" |
| #include "SkMorphologyImageFilter.h" |
| #include "SkColorFilterImageFilter.h" |
| #include "SkMergeImageFilter.h" |
| #include "SkOffsetImageFilter.h" |
| #include "SkSurface.h" |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class ImageFiltersCropExpandGM : public skiagm::GM { |
| public: |
| ImageFiltersCropExpandGM () {} |
| |
| protected: |
| |
| SkString onShortName() override { |
| return SkString("imagefilterscropexpand"); |
| } |
| |
| SkISize onISize() override { return SkISize::Make(650, 650); } |
| |
| void onDraw(SkCanvas* canvas) override { |
| SkAutoTUnref<SkColorFilter> cf( |
| SkColorFilter::CreateModeFilter(SK_ColorBLUE, SkXfermode::kSrcIn_Mode)); |
| SkImageFilter::CropRect cropRect( |
| SkRect::Make(SkIRect::MakeXYWH(10, 10, 44, 44)), |
| SkImageFilter::CropRect::kHasAll_CropEdge); |
| |
| SkAutoTUnref<SkImage> gradientCircle(MakeGradientCircle(64, 64)); |
| SkBitmap checkerboard; |
| MakeCheckerboard(&checkerboard); |
| |
| SkAutoTUnref<SkImageFilter> gradientCircleSource( |
| SkImageSource::Create(gradientCircle)); |
| SkAutoTUnref<SkImageFilter> noopCropped( |
| SkOffsetImageFilter::Create(0, 0, nullptr, &cropRect)); |
| SkScalar sk255 = SkIntToScalar(255); |
| SkScalar matrix[20] = { 1, 0, 0, 0, 0, |
| 0, 1, 0, 0, sk255, |
| 0, 0, 1, 0, 0, |
| 0, 0, 0, 0, sk255 }; |
| SkAutoTUnref<SkColorFilter> cfAlphaTrans(SkColorMatrixFilter::Create(matrix)); |
| |
| SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64)); |
| SkScalar MARGIN = SkIntToScalar(12); |
| |
| SkIRect bounds; |
| r.roundOut(&bounds); |
| |
| SkPaint paint; |
| canvas->translate(MARGIN, MARGIN); |
| for (int outset = -15; outset <= 20; outset += 5) { |
| canvas->save(); |
| SkRect rect = cropRect.rect(); |
| rect.outset(SkIntToScalar(outset), |
| SkIntToScalar(outset)); |
| SkImageFilter::CropRect big_rect(rect, SkImageFilter::CropRect::kHasAll_CropEdge); |
| |
| Draw(canvas, checkerboard, rect, SkColorFilterImageFilter::Create( |
| cfAlphaTrans, noopCropped.get(), &big_rect)); |
| |
| Draw(canvas, checkerboard, rect, SkBlurImageFilter::Create( |
| 0.3f, 0.3f, noopCropped.get(), &big_rect)); |
| |
| Draw(canvas, checkerboard, rect, SkBlurImageFilter::Create( |
| 8.0f, 8.0f, noopCropped.get(), &big_rect)); |
| |
| Draw(canvas, checkerboard, rect, SkDilateImageFilter::Create( |
| 2, 2, noopCropped.get(), &big_rect)); |
| |
| Draw(canvas, checkerboard, rect, SkErodeImageFilter::Create( |
| 2, 2, noopCropped.get(), &big_rect)); |
| |
| Draw(canvas, checkerboard, rect, SkDropShadowImageFilter::Create( |
| SkIntToScalar(10), SkIntToScalar(10), SkIntToScalar(3), SkIntToScalar(3), |
| SK_ColorBLUE, SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode, |
| noopCropped.get(), &big_rect)); |
| |
| Draw(canvas, checkerboard, rect, SkDisplacementMapEffect::Create( |
| SkDisplacementMapEffect::kR_ChannelSelectorType, |
| SkDisplacementMapEffect::kR_ChannelSelectorType, |
| SkIntToScalar(12), |
| gradientCircleSource.get(), |
| noopCropped.get(), |
| &big_rect)); |
| |
| Draw(canvas, checkerboard, rect, SkOffsetImageFilter::Create( |
| SkIntToScalar(-8), SkIntToScalar(16), noopCropped.get(), &big_rect)); |
| |
| canvas->restore(); |
| canvas->translate(0, SkIntToScalar(80)); |
| } |
| } |
| |
| private: |
| static void MakeCheckerboard(SkBitmap* bitmap) { |
| bitmap->allocN32Pixels(64, 64); |
| SkCanvas canvas(*bitmap); |
| canvas.clear(0xFFFF0000); |
| SkPaint darkPaint; |
| darkPaint.setColor(sk_tool_utils::color_to_565(0xFF404040)); |
| SkPaint lightPaint; |
| lightPaint.setColor(sk_tool_utils::color_to_565(0xFFA0A0A0)); |
| for (int y = 8; y < 48; y += 16) { |
| for (int x = 8; x < 48; x += 16) { |
| canvas.save(); |
| canvas.translate(SkIntToScalar(x), SkIntToScalar(y)); |
| canvas.drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint); |
| canvas.drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint); |
| canvas.drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint); |
| canvas.drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint); |
| canvas.restore(); |
| } |
| } |
| } |
| |
| static SkImage* MakeGradientCircle(int width, int height) { |
| SkScalar x = SkIntToScalar(width / 2); |
| SkScalar y = SkIntToScalar(height / 2); |
| SkScalar radius = SkMinScalar(x, y) * 0.8f; |
| SkAutoTUnref<SkSurface> surface(SkSurface::NewRasterN32Premul(width, height)); |
| SkCanvas* canvas = surface->getCanvas(); |
| canvas->clear(0x00000000); |
| SkColor colors[2]; |
| colors[0] = SK_ColorWHITE; |
| colors[1] = SK_ColorBLACK; |
| SkAutoTUnref<SkShader> shader( |
| SkGradientShader::CreateRadial(SkPoint::Make(x, y), radius, colors, nullptr, 2, |
| SkShader::kClamp_TileMode) |
| ); |
| SkPaint paint; |
| paint.setShader(shader); |
| canvas->drawCircle(x, y, radius, paint); |
| |
| return surface->newImageSnapshot(); |
| } |
| |
| static void Draw(SkCanvas* canvas, const SkBitmap& bitmap, const SkRect& rect, SkImageFilter* filter) { |
| SkPaint paint; |
| paint.setImageFilter(filter)->unref(); |
| canvas->saveLayer(&rect, &paint); |
| canvas->drawBitmap(bitmap, 0, 0); |
| canvas->restore(); |
| |
| SkPaint strokePaint; |
| strokePaint.setColor(0xFFFF0000); |
| strokePaint.setStyle(SkPaint::kStroke_Style); |
| canvas->drawRect(rect, strokePaint); |
| |
| canvas->translate(SkIntToScalar(80), 0); |
| } |
| |
| typedef GM INHERITED; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM( return new ImageFiltersCropExpandGM; ) |