| /* |
| * 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/gm.h" |
| #include "include/core/SkBitmap.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkClipOp.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkFont.h" |
| #include "include/core/SkFontTypes.h" |
| #include "include/core/SkMatrix.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPathBuilder.h" |
| #include "include/core/SkPoint.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkShader.h" |
| #include "include/core/SkSize.h" |
| #include "include/core/SkString.h" |
| #include "include/core/SkTileMode.h" |
| #include "include/core/SkTypeface.h" |
| #include "include/core/SkTypes.h" |
| #include "include/effects/SkGradientShader.h" |
| #include "tools/ToolUtils.h" |
| |
| static sk_sp<SkImage> make_img(int w, int h) { |
| auto surf = SkSurfaces::Raster(SkImageInfo::MakeN32(w, h, kOpaque_SkAlphaType)); |
| auto canvas = surf->getCanvas(); |
| |
| SkScalar wScalar = SkIntToScalar(w); |
| SkScalar hScalar = SkIntToScalar(h); |
| |
| SkPoint pt = { wScalar / 2, hScalar / 2 }; |
| |
| SkScalar radius = 3 * std::max(wScalar, hScalar); |
| |
| SkColor colors[] = {SK_ColorDKGRAY, |
| ToolUtils::color_to_565(0xFF222255), |
| ToolUtils::color_to_565(0xFF331133), |
| ToolUtils::color_to_565(0xFF884422), |
| ToolUtils::color_to_565(0xFF000022), |
| SK_ColorWHITE, |
| ToolUtils::color_to_565(0xFFAABBCC)}; |
| |
| SkScalar pos[] = {0, |
| SK_Scalar1 / 6, |
| 2 * SK_Scalar1 / 6, |
| 3 * SK_Scalar1 / 6, |
| 4 * SK_Scalar1 / 6, |
| 5 * SK_Scalar1 / 6, |
| SK_Scalar1}; |
| |
| SkPaint paint; |
| SkRect rect = SkRect::MakeWH(wScalar, hScalar); |
| SkMatrix mat = SkMatrix::I(); |
| for (int i = 0; i < 4; ++i) { |
| paint.setShader(SkGradientShader::MakeRadial( |
| pt, radius, |
| colors, pos, |
| std::size(colors), |
| SkTileMode::kRepeat, |
| 0, &mat)); |
| canvas->drawRect(rect, paint); |
| rect.inset(wScalar / 8, hScalar / 8); |
| mat.preTranslate(6 * wScalar, 6 * hScalar); |
| mat.postScale(SK_Scalar1 / 3, SK_Scalar1 / 3); |
| } |
| |
| SkFont font(ToolUtils::create_portable_typeface(), wScalar / 2.2f); |
| |
| paint.setShader(nullptr); |
| paint.setColor(SK_ColorLTGRAY); |
| constexpr char kTxt[] = "Skia"; |
| SkPoint texPos = { wScalar / 17, hScalar / 2 + font.getSize() / 2.5f }; |
| canvas->drawSimpleText(kTxt, std::size(kTxt)-1, SkTextEncoding::kUTF8, |
| texPos.fX, texPos.fY, font, paint); |
| paint.setColor(SK_ColorBLACK); |
| paint.setStyle(SkPaint::kStroke_Style); |
| paint.setStrokeWidth(SK_Scalar1); |
| canvas->drawSimpleText(kTxt, std::size(kTxt)-1, SkTextEncoding::kUTF8, |
| texPos.fX, texPos.fY, font, paint); |
| return surf->makeImageSnapshot(); |
| } |
| |
| namespace skiagm { |
| /** |
| * This GM tests convex polygon clips. |
| */ |
| class ConvexPolyClip : public GM { |
| public: |
| ConvexPolyClip() { |
| this->setBGColor(0xFFFFFFFF); |
| } |
| |
| protected: |
| SkString onShortName() override { |
| return SkString("convex_poly_clip"); |
| } |
| |
| SkISize onISize() override { |
| // When benchmarking the saveLayer set of draws is skipped. |
| int w = 435; |
| if (kBench_Mode != this->getMode()) { |
| w *= 2; |
| } |
| return SkISize::Make(w, 540); |
| } |
| |
| void onOnceBeforeDraw() override { |
| // On < c++17, emplace_back() returns a void :( |
| auto emplace_back = [](std::vector<Clip>& clips) -> Clip& { |
| clips.emplace_back(); |
| return clips.back(); |
| }; |
| |
| emplace_back(fClips).setPath(SkPath::Polygon({ |
| { 5.f, 5.f}, |
| {100.f, 20.f}, |
| { 15.f, 100.f}, |
| }, false)); |
| |
| SkPathBuilder hexagon; |
| constexpr SkScalar kRadius = 45.f; |
| const SkPoint center = { kRadius, kRadius }; |
| for (int i = 0; i < 6; ++i) { |
| SkScalar angle = 2 * SK_ScalarPI * i / 6; |
| SkPoint point = { SkScalarCos(angle), SkScalarSin(angle) }; |
| point.scale(kRadius); |
| point = center + point; |
| if (0 == i) { |
| hexagon.moveTo(point); |
| } else { |
| hexagon.lineTo(point); |
| } |
| } |
| emplace_back(fClips).setPath(hexagon.snapshot()); |
| |
| SkMatrix scaleM; |
| scaleM.setScale(1.1f, 0.4f, kRadius, kRadius); |
| emplace_back(fClips).setPath(hexagon.detach().makeTransform(scaleM)); |
| |
| emplace_back(fClips).setRect(SkRect::MakeXYWH(8.3f, 11.6f, 78.2f, 72.6f)); |
| |
| SkRect rect = SkRect::MakeLTRB(10.f, 12.f, 80.f, 86.f); |
| SkMatrix rotM; |
| rotM.setRotate(23.f, rect.centerX(), rect.centerY()); |
| emplace_back(fClips).setPath(SkPath::Rect(rect).makeTransform(rotM)); |
| |
| fImg = make_img(100, 100); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| SkScalar y = 0; |
| constexpr SkScalar kMargin = 10.f; |
| |
| SkPaint bgPaint; |
| bgPaint.setAlpha(0x15); |
| SkISize size = canvas->getBaseLayerSize(); |
| canvas->drawImageRect(fImg, SkRect::MakeIWH(size.fWidth, size.fHeight), |
| SkSamplingOptions(), &bgPaint); |
| |
| constexpr char kTxt[] = "Clip Me!"; |
| SkFont font(ToolUtils::create_portable_typeface(), 23); |
| SkScalar textW = font.measureText(kTxt, std::size(kTxt)-1, SkTextEncoding::kUTF8); |
| SkPaint txtPaint; |
| txtPaint.setColor(SK_ColorDKGRAY); |
| |
| SkScalar startX = 0; |
| int testLayers = kBench_Mode != this->getMode(); |
| for (int doLayer = 0; doLayer <= testLayers; ++doLayer) { |
| for (const Clip& clip : fClips) { |
| SkScalar x = startX; |
| for (int aa = 0; aa < 2; ++aa) { |
| if (doLayer) { |
| SkRect bounds; |
| clip.getBounds(&bounds); |
| bounds.outset(2, 2); |
| bounds.offset(x, y); |
| canvas->saveLayer(&bounds, nullptr); |
| } else { |
| canvas->save(); |
| } |
| canvas->translate(x, y); |
| clip.setOnCanvas(canvas, SkClipOp::kIntersect, SkToBool(aa)); |
| canvas->drawImage(fImg, 0, 0); |
| canvas->restore(); |
| x += fImg->width() + kMargin; |
| } |
| for (int aa = 0; aa < 2; ++aa) { |
| |
| SkPaint clipOutlinePaint; |
| clipOutlinePaint.setAntiAlias(true); |
| clipOutlinePaint.setColor(0x50505050); |
| clipOutlinePaint.setStyle(SkPaint::kStroke_Style); |
| clipOutlinePaint.setStrokeWidth(0); |
| |
| if (doLayer) { |
| SkRect bounds; |
| clip.getBounds(&bounds); |
| bounds.outset(2, 2); |
| bounds.offset(x, y); |
| canvas->saveLayer(&bounds, nullptr); |
| } else { |
| canvas->save(); |
| } |
| canvas->translate(x, y); |
| SkPath closedClipPath = clip.asClosedPath(); |
| canvas->drawPath(closedClipPath, clipOutlinePaint); |
| clip.setOnCanvas(canvas, SkClipOp::kIntersect, SkToBool(aa)); |
| canvas->scale(1.f, 1.8f); |
| canvas->drawSimpleText(kTxt, std::size(kTxt)-1, SkTextEncoding::kUTF8, |
| 0, 1.5f * font.getSize(), font, txtPaint); |
| canvas->restore(); |
| x += textW + 2 * kMargin; |
| } |
| y += fImg->height() + kMargin; |
| } |
| y = 0; |
| startX += 2 * fImg->width() + SkScalarCeilToInt(2 * textW) + 6 * kMargin; |
| } |
| } |
| |
| bool runAsBench() const override { return true; } |
| |
| private: |
| class Clip { |
| public: |
| enum ClipType { |
| kNone_ClipType, |
| kPath_ClipType, |
| kRect_ClipType |
| }; |
| |
| Clip () : fClipType(kNone_ClipType) {} |
| |
| void setOnCanvas(SkCanvas* canvas, SkClipOp op, bool aa) const { |
| switch (fClipType) { |
| case kPath_ClipType: |
| canvas->clipPath(fPathBuilder.snapshot(), op, aa); |
| break; |
| case kRect_ClipType: |
| canvas->clipRect(fRect, op, aa); |
| break; |
| case kNone_ClipType: |
| SkDEBUGFAIL("Uninitialized Clip."); |
| break; |
| } |
| } |
| |
| SkPath asClosedPath() const { |
| switch (fClipType) { |
| case kPath_ClipType: |
| return SkPathBuilder(fPathBuilder).close().detach(); |
| case kRect_ClipType: |
| return SkPath::Rect(fRect); |
| case kNone_ClipType: |
| SkDEBUGFAIL("Uninitialized Clip."); |
| break; |
| } |
| return SkPath(); |
| } |
| |
| void setPath(const SkPath& path) { |
| fClipType = kPath_ClipType; |
| fPathBuilder = path; |
| } |
| |
| void setRect(const SkRect& rect) { |
| fClipType = kRect_ClipType; |
| fRect = rect; |
| fPathBuilder.reset(); |
| } |
| |
| ClipType getType() const { return fClipType; } |
| |
| void getBounds(SkRect* bounds) const { |
| switch (fClipType) { |
| case kPath_ClipType: |
| *bounds = fPathBuilder.computeBounds(); |
| break; |
| case kRect_ClipType: |
| *bounds = fRect; |
| break; |
| case kNone_ClipType: |
| SkDEBUGFAIL("Uninitialized Clip."); |
| break; |
| } |
| } |
| |
| private: |
| ClipType fClipType; |
| SkPathBuilder fPathBuilder; |
| SkRect fRect; |
| }; |
| |
| std::vector<Clip> fClips; |
| sk_sp<SkImage> fImg;; |
| |
| using INHERITED = GM; |
| }; |
| |
| DEF_GM(return new ConvexPolyClip;) |
| } // namespace skiagm |