| /* |
| * Copyright 2013 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/SkCanvas.h" |
| #include "include/core/SkMaskFilter.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPath.h" |
| #include "include/core/SkPathEffect.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkTypes.h" |
| #include "include/effects/SkDashPathEffect.h" |
| #include "include/effects/SkImageFilters.h" |
| |
| #include <utility> |
| |
| static SkPath generate_square(SkScalar cx, SkScalar cy, SkScalar w) { |
| return SkPath::Rect(SkRect::MakeXYWH(cx - w / 2, cy - w / 2, w, w)); |
| } |
| |
| static SkPath generate_rect_line(SkScalar cx, SkScalar cy, SkScalar l) { |
| return SkPath::Rect(SkRect::MakeXYWH(cx - l / 2, cy, l, 0)); |
| } |
| |
| static SkPath generate_circle(SkScalar cx, SkScalar cy, SkScalar d) { |
| return SkPath::Circle(cx, cy, d/2, SkPathDirection::kCW); |
| } |
| |
| static SkPath generate_line(SkScalar cx, SkScalar cy, SkScalar l) { |
| return SkPath::Line({cx - l / 2, cy}, {cx + l / 2, cy}); |
| } |
| |
| namespace { |
| struct Style { |
| Style(SkPaint::Style paintStyle, sk_sp<SkPathEffect> pe = sk_sp<SkPathEffect>()) |
| : fPaintStyle(paintStyle) |
| , fPathEffect(std::move(pe)) {} |
| SkPaint::Style fPaintStyle; |
| sk_sp<SkPathEffect> fPathEffect; |
| }; |
| |
| sk_sp<SkPathEffect> make_dash() { |
| constexpr SkScalar kIntervals[] = { 4.f, 3.f }; |
| return SkDashPathEffect::Make(kIntervals, std::size(kIntervals), 0); |
| } |
| |
| Style styles[] { |
| {SkPaint::kStroke_Style}, |
| {SkPaint::kStrokeAndFill_Style}, |
| {SkPaint::kFill_Style}, |
| {SkPaint::kStroke_Style, make_dash()}, |
| }; |
| |
| SkScalar pathSizes[] = { |
| 40, |
| 10, |
| 0 |
| }; |
| SkScalar strokeWidths[] = { |
| 10, |
| 0 |
| }; |
| SkPath (*paths[])(SkScalar, SkScalar, SkScalar) = { |
| generate_square, |
| generate_rect_line, |
| generate_circle, |
| generate_line |
| }; |
| |
| const SkScalar slideWidth = 90, slideHeight = 90; |
| const SkScalar slideBoundary = 5; |
| |
| } // namespace |
| |
| DEF_SIMPLE_GM(inverse_paths, canvas, 800, 1200) { |
| SkScalar cx = slideWidth / 2 + slideBoundary; |
| SkScalar cy = slideHeight / 2 + slideBoundary; |
| SkScalar dx = slideWidth + 2 * slideBoundary; |
| SkScalar dy = slideHeight + 2 * slideBoundary; |
| |
| SkRect clipRect = SkRect::MakeLTRB(slideBoundary, slideBoundary, |
| slideBoundary + slideWidth, |
| slideBoundary + slideHeight); |
| SkPaint clipPaint; |
| clipPaint.setStyle(SkPaint::kStroke_Style); |
| clipPaint.setStrokeWidth(SkIntToScalar(2)); |
| |
| SkPaint outlinePaint; |
| outlinePaint.setColor(0x40000000); |
| outlinePaint.setStyle(SkPaint::kStroke_Style); |
| outlinePaint.setStrokeWidth(SkIntToScalar(0)); |
| |
| for (size_t styleIndex = 0; styleIndex < std::size(styles); |
| styleIndex++) { |
| for (size_t sizeIndex = 0; sizeIndex < std::size(pathSizes); |
| sizeIndex++) { |
| SkScalar size = pathSizes[sizeIndex]; |
| |
| canvas->save(); |
| |
| for (size_t widthIndex = 0; |
| widthIndex < std::size(strokeWidths); |
| widthIndex++) { |
| SkPaint paint; |
| paint.setColor(0xff007000); |
| paint.setStrokeWidth(strokeWidths[widthIndex]); |
| paint.setStyle(styles[styleIndex].fPaintStyle); |
| paint.setPathEffect(styles[styleIndex].fPathEffect); |
| |
| for (size_t pathIndex = 0; |
| pathIndex < std::size(paths); |
| pathIndex++) { |
| canvas->drawRect(clipRect, clipPaint); |
| |
| canvas->save(); |
| canvas->clipRect(clipRect); |
| |
| SkPath path = paths[pathIndex](cx, cy, size); |
| path.setFillType(SkPathFillType::kInverseWinding); |
| canvas->drawPath(path, paint); |
| |
| path.setFillType(SkPathFillType::kWinding); |
| canvas->drawPath(path, outlinePaint); |
| |
| canvas->restore(); |
| canvas->translate(dx, 0); |
| } |
| } |
| canvas->restore(); |
| canvas->translate(0, dy); |
| } |
| } |
| } |
| |
| DEF_SIMPLE_GM(inverse_fill_filters, canvas, 384, 128) { |
| auto draw = [canvas](const SkPaint& paint) { |
| SkPath path = SkPath::Circle(65.f, 65.f, 30.f); |
| path.setFillType(SkPathFillType::kInverseWinding); |
| |
| canvas->save(); |
| canvas->clipRect({0, 0, 128, 128}); |
| canvas->drawPath(path, paint); |
| canvas->restore(); |
| |
| SkPaint stroke; |
| stroke.setStyle(SkPaint::kStroke_Style); |
| stroke.setColor(SK_ColorWHITE); |
| canvas->drawRect({0, 0, 128, 128}, stroke); |
| }; |
| |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| |
| draw(paint); |
| |
| canvas->translate(128, 0); |
| paint.setImageFilter(SkImageFilters::Blur(5.f, 5.f, nullptr)); |
| draw(paint); |
| |
| canvas->translate(128, 0); |
| paint.setImageFilter(nullptr); |
| paint.setMaskFilter(SkMaskFilter::MakeBlur(kNormal_SkBlurStyle, 5)); |
| draw(paint); |
| } |
| |
| DEF_SIMPLE_GM(inverse_windingmode_filters, canvas, 256, 100) { |
| SkPath path; |
| path.addRect({10, 10, 30, 30}, SkPathDirection::kCW); |
| path.addRect({20, 20, 40, 40}, SkPathDirection::kCW); |
| path.addRect({10, 60, 30, 80}, SkPathDirection::kCW); |
| path.addRect({20, 70, 40, 90}, SkPathDirection::kCCW); |
| SkPaint strokePaint; |
| strokePaint.setStyle(SkPaint::kStroke_Style); |
| SkRect clipRect = {0, 0, 51, 99}; |
| canvas->drawPath(path, strokePaint); |
| SkPaint fillPaint; |
| fillPaint.setMaskFilter(SkMaskFilter::MakeBlur(kNormal_SkBlurStyle, 1.0f)); |
| for (auto fillType : { SkPathFillType::kWinding, |
| SkPathFillType::kEvenOdd, |
| SkPathFillType::kInverseWinding, |
| SkPathFillType::kInverseEvenOdd } ) { |
| canvas->translate(51, 0); |
| canvas->save(); |
| canvas->clipRect(clipRect); |
| path.setFillType(fillType); |
| canvas->drawPath(path, fillPaint); |
| canvas->restore(); |
| SkPaint clipPaint; |
| clipPaint.setColor(SK_ColorRED); |
| clipPaint.setStyle(SkPaint::kStroke_Style); |
| clipPaint.setStrokeWidth(1.f); |
| canvas->drawRect(clipRect, clipPaint); |
| } |
| } |