| /* |
| * 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 "sk_tool_utils.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 "SkLightingImageFilter.h" |
| #include "SkMergeImageFilter.h" |
| #include "SkOffsetImageFilter.h" |
| #include "SkPoint3.h" |
| #include "SkSurface.h" |
| |
| namespace { |
| |
| void make_checkerboard(SkBitmap* bitmap); |
| sk_sp<SkImage> make_gradient_circle(int width, int height); |
| void draw(SkCanvas* canvas, const SkBitmap& bitmap, const SkRect& rect, |
| sk_sp<SkImageFilter> filter); |
| |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_SIMPLE_GM(imagefilterscropexpand, canvas, 730, 650) { |
| SkImageFilter::CropRect cropRect( |
| SkRect::Make(SkIRect::MakeXYWH(10, 10, 44, 44)), |
| SkImageFilter::CropRect::kHasAll_CropEdge); |
| |
| sk_sp<SkImage> gradientCircle(make_gradient_circle(64, 64)); |
| SkBitmap checkerboard; |
| make_checkerboard(&checkerboard); |
| |
| sk_sp<SkImageFilter> gradientCircleSource(SkImageSource::Make(std::move(gradientCircle))); |
| sk_sp<SkImageFilter> noopCropped(SkOffsetImageFilter::Make(0, 0, nullptr, &cropRect)); |
| // This color matrix saturates the green component but only partly increases the opacity. |
| // For the opaque checkerboard, the opacity boost doesn't matter but it does impact the |
| // area outside the checkerboard. |
| SkScalar matrix[20] = { 1, 0, 0, 0, 0, |
| 0, 1, 0, 0, 255, |
| 0, 0, 1, 0, 0, |
| 0, 0, 0, 1, 32 }; |
| sk_sp<SkColorFilter> cfAlphaTrans(SkColorFilter::MakeMatrixFilterRowMajor255(matrix)); |
| |
| SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64)); |
| SkScalar MARGIN = SkIntToScalar(12); |
| |
| SkPoint3 pointLocation = SkPoint3::Make(0, 0, SkIntToScalar(10)); |
| SkScalar kd = SkIntToScalar(2); |
| SkScalar surfaceScale = SkIntToScalar(1); |
| 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 bigRect(rect, SkImageFilter::CropRect::kHasAll_CropEdge); |
| |
| draw(canvas, checkerboard, rect, SkColorFilterImageFilter::Make(cfAlphaTrans, |
| noopCropped, |
| &bigRect)); |
| |
| draw(canvas, checkerboard, rect, SkBlurImageFilter::Make(0.3f, 0.3f, |
| noopCropped, |
| &bigRect)); |
| |
| draw(canvas, checkerboard, rect, SkBlurImageFilter::Make(8.0f, 8.0f, |
| noopCropped, |
| &bigRect)); |
| |
| draw(canvas, checkerboard, rect, SkDilateImageFilter::Make(2, 2, |
| noopCropped, |
| &bigRect)); |
| |
| draw(canvas, checkerboard, rect, SkErodeImageFilter::Make(2, 2, |
| noopCropped, |
| &bigRect)); |
| |
| draw(canvas, checkerboard, rect, |
| SkDropShadowImageFilter::Make( |
| SkIntToScalar(10), |
| SkIntToScalar(10), |
| SkIntToScalar(3), |
| SkIntToScalar(3), |
| SK_ColorBLUE, |
| SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode, |
| noopCropped, |
| &bigRect)); |
| |
| draw(canvas, checkerboard, rect, |
| SkDisplacementMapEffect::Make(SkDisplacementMapEffect::kR_ChannelSelectorType, |
| SkDisplacementMapEffect::kR_ChannelSelectorType, |
| SkIntToScalar(12), |
| gradientCircleSource, |
| noopCropped, |
| &bigRect)); |
| |
| draw(canvas, checkerboard, rect, |
| SkOffsetImageFilter::Make(SkIntToScalar(-8), SkIntToScalar(16), |
| noopCropped, |
| &bigRect)); |
| |
| draw(canvas, checkerboard, rect, |
| SkLightingImageFilter::MakePointLitDiffuse(pointLocation, |
| SK_ColorWHITE, |
| surfaceScale, |
| kd, |
| noopCropped, |
| &bigRect)); |
| |
| canvas->restore(); |
| canvas->translate(0, SkIntToScalar(80)); |
| } |
| } |
| |
| namespace { |
| void make_checkerboard(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(); |
| } |
| } |
| } |
| |
| sk_sp<SkImage> make_gradient_circle(int width, int height) { |
| SkScalar x = SkIntToScalar(width / 2); |
| SkScalar y = SkIntToScalar(height / 2); |
| SkScalar radius = SkMinScalar(x, y) * 0.8f; |
| auto surface(SkSurface::MakeRasterN32Premul(width, height)); |
| SkCanvas* canvas = surface->getCanvas(); |
| canvas->clear(0x00000000); |
| SkColor colors[2]; |
| colors[0] = SK_ColorWHITE; |
| colors[1] = SK_ColorBLACK; |
| SkPaint paint; |
| paint.setShader(SkGradientShader::MakeRadial(SkPoint::Make(x, y), radius, colors, nullptr, |
| 2, SkShader::kClamp_TileMode)); |
| canvas->drawCircle(x, y, radius, paint); |
| |
| return surface->makeImageSnapshot(); |
| } |
| |
| void draw(SkCanvas* canvas, const SkBitmap& bitmap, const SkRect& rect, |
| sk_sp<SkImageFilter> filter) { |
| SkPaint paint; |
| paint.setImageFilter(std::move(filter)); |
| 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); |
| } |
| }; |