/* * 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 "SkBitmap.h" #include "SkGradientShader.h" #include "SkTLList.h" static SkBitmap make_bmp(int w, int h) { SkBitmap bmp; bmp.allocN32Pixels(w, h, true); SkCanvas canvas(bmp); SkScalar wScalar = SkIntToScalar(w); SkScalar hScalar = SkIntToScalar(h); SkPoint pt = { wScalar / 2, hScalar / 2 }; SkScalar radius = 3 * SkMaxScalar(wScalar, hScalar); SkColor colors[] = { SK_ColorDKGRAY, 0xFF222255, 0xFF331133, 0xFF884422, 0xFF000022, SK_ColorWHITE, 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::CreateRadial( pt, radius, colors, pos, SK_ARRAY_COUNT(colors), SkShader::kRepeat_TileMode, 0, &mat))->unref(); canvas.drawRect(rect, paint); rect.inset(wScalar / 8, hScalar / 8); mat.preTranslate(6 * wScalar, 6 * hScalar); mat.postScale(SK_Scalar1 / 3, SK_Scalar1 / 3); } paint.setAntiAlias(true); paint.setTextSize(wScalar / 2.2f); paint.setShader(0); paint.setColor(SK_ColorLTGRAY); static const char kTxt[] = "Skia"; SkPoint texPos = { wScalar / 17, hScalar / 2 + paint.getTextSize() / 2.5f }; canvas.drawText(kTxt, SK_ARRAY_COUNT(kTxt)-1, texPos.fX, texPos.fY, paint); paint.setColor(SK_ColorBLACK); paint.setStyle(SkPaint::kStroke_Style); paint.setStrokeWidth(SK_Scalar1); canvas.drawText(kTxt, SK_ARRAY_COUNT(kTxt)-1, texPos.fX, texPos.fY, paint); return bmp; } namespace skiagm { /** * This GM tests convex polygon clips. */ class ConvexPolyClip : public GM { public: ConvexPolyClip() { this->setBGColor(0xFFFFFFFF); } protected: virtual SkString onShortName() SK_OVERRIDE { return SkString("convex_poly_clip"); } virtual SkISize onISize() SK_OVERRIDE { // When benchmarking the saveLayer set of draws is skipped. int w = 435; if (kBench_Mode != this->getMode()) { w *= 2; } return make_isize(w, 540); } virtual void onOnceBeforeDraw() SK_OVERRIDE { SkPath tri; tri.moveTo(5.f, 5.f); tri.lineTo(100.f, 20.f); tri.lineTo(15.f, 100.f); fClips.addToTail()->setPath(tri); SkPath hexagon; static const 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; point.fY = SkScalarSinCos(angle, &point.fX); point.scale(kRadius); point = center + point; if (0 == i) { hexagon.moveTo(point); } else { hexagon.lineTo(point); } } fClips.addToTail()->setPath(hexagon); SkMatrix scaleM; scaleM.setScale(1.1f, 0.4f, kRadius, kRadius); hexagon.transform(scaleM); fClips.addToTail()->setPath(hexagon); fClips.addToTail()->setRect(SkRect::MakeXYWH(8.3f, 11.6f, 78.2f, 72.6f)); SkPath rotRect; SkRect rect = SkRect::MakeLTRB(10.f, 12.f, 80.f, 86.f); rotRect.addRect(rect); SkMatrix rotM; rotM.setRotate(23.f, rect.centerX(), rect.centerY()); rotRect.transform(rotM); fClips.addToTail()->setPath(rotRect); fBmp = make_bmp(100, 100); } virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { SkScalar y = 0; static const SkScalar kMargin = 10.f; SkPaint bgPaint; bgPaint.setAlpha(0x15); SkISize size = canvas->getDeviceSize(); SkRect dstRect = SkRect::MakeWH(SkIntToScalar(size.fWidth), SkIntToScalar(size.fHeight)); canvas->drawBitmapRectToRect(fBmp, NULL, dstRect, &bgPaint); static const char kTxt[] = "Clip Me!"; SkPaint txtPaint; txtPaint.setTextSize(23.f); txtPaint.setAntiAlias(true); txtPaint.setColor(SK_ColorDKGRAY); SkScalar textW = txtPaint.measureText(kTxt, SK_ARRAY_COUNT(kTxt)-1); SkScalar startX = 0; int testLayers = kBench_Mode != this->getMode(); for (int doLayer = 0; doLayer <= testLayers; ++doLayer) { for (SkTLList::Iter iter(fClips, SkTLList::Iter::kHead_IterStart); NULL != iter.get(); iter.next()) { const Clip* clip = iter.get(); 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, NULL); } else { canvas->save(); } canvas->translate(x, y); clip->setOnCanvas(canvas, SkRegion::kIntersect_Op, SkToBool(aa)); canvas->drawBitmap(fBmp, 0, 0); canvas->restore(); x += fBmp.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, NULL); } else { canvas->save(); } canvas->translate(x, y); SkPath closedClipPath; clip->asClosedPath(&closedClipPath); canvas->drawPath(closedClipPath, clipOutlinePaint); clip->setOnCanvas(canvas, SkRegion::kIntersect_Op, SkToBool(aa)); canvas->scale(1.f, 1.8f); canvas->drawText(kTxt, SK_ARRAY_COUNT(kTxt)-1, 0, 1.5f * txtPaint.getTextSize(), txtPaint); canvas->restore(); x += textW + 2 * kMargin; } y += fBmp.height() + kMargin; } y = 0; startX += 2 * fBmp.width() + SkScalarCeilToInt(2 * textW) + 6 * kMargin; } } virtual uint32_t onGetFlags() const { return kAsBench_Flag | kSkipTiled_Flag; } private: class Clip { public: enum ClipType { kNone_ClipType, kPath_ClipType, kRect_ClipType }; Clip () : fClipType(kNone_ClipType) {} void setOnCanvas(SkCanvas* canvas, SkRegion::Op op, bool aa) const { switch (fClipType) { case kPath_ClipType: canvas->clipPath(fPath, op, aa); break; case kRect_ClipType: canvas->clipRect(fRect, op, aa); break; case kNone_ClipType: SkDEBUGFAIL("Uninitialized Clip."); break; } } void asClosedPath(SkPath* path) const { switch (fClipType) { case kPath_ClipType: *path = fPath; path->close(); break; case kRect_ClipType: path->reset(); path->addRect(fRect); break; case kNone_ClipType: SkDEBUGFAIL("Uninitialized Clip."); break; } } void setPath(const SkPath& path) { fClipType = kPath_ClipType; fPath = path; } void setRect(const SkRect& rect) { fClipType = kRect_ClipType; fRect = rect; fPath.reset(); } ClipType getType() const { return fClipType; } void getBounds(SkRect* bounds) const { switch (fClipType) { case kPath_ClipType: *bounds = fPath.getBounds(); break; case kRect_ClipType: *bounds = fRect; break; case kNone_ClipType: SkDEBUGFAIL("Uninitialized Clip."); break; } } private: ClipType fClipType; SkPath fPath; SkRect fRect; }; SkTLList fClips; SkBitmap fBmp; typedef GM INHERITED; }; DEF_GM( return SkNEW(ConvexPolyClip); ) }