| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "samplecode/Sample.h" |
| |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkFont.h" |
| #include "include/core/SkMaskFilter.h" |
| #include "include/core/SkPath.h" |
| #include "include/utils/SkParsePath.h" |
| #include "include/utils/SkRandom.h" |
| #include "src/core/SkBlurMask.h" |
| |
| |
| static void test_huge_stroke(SkCanvas* canvas) { |
| SkRect srcR = { 0, 0, 72000, 54000 }; |
| SkRect dstR = { 0, 0, 640, 480 }; |
| |
| SkPath path; |
| path.moveTo(17600, 8000); |
| path.lineTo(52800, 8000); |
| path.lineTo(52800, 41600); |
| path.lineTo(17600, 41600); |
| path.close(); |
| |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| paint.setStrokeWidth(8000); |
| paint.setStrokeMiter(10); |
| paint.setStrokeCap(SkPaint::kButt_Cap); |
| paint.setStrokeJoin(SkPaint::kRound_Join); |
| paint.setStyle(SkPaint::kStroke_Style); |
| |
| canvas->concat(SkMatrix::RectToRect(srcR, dstR, SkMatrix::kCenter_ScaleToFit)); |
| |
| canvas->drawPath(path, paint); |
| } |
| |
| #if 0 |
| static void test_blur() { |
| uint8_t cell[9]; |
| memset(cell, 0xFF, sizeof(cell)); |
| SkMask src; |
| src.fImage = cell; |
| src.fFormat = SkMask::kA8_Format; |
| SkMask dst; |
| |
| for (int y = 1; y <= 3; y++) { |
| for (int x = 1; x <= 3; x++) { |
| src.fBounds.set(0, 0, x, y); |
| src.fRowBytes = src.fBounds.width(); |
| |
| SkScalar radius = 1.f; |
| |
| printf("src [%d %d %d %d] radius %g\n", src.fBounds.fLeft, src.fBounds.fTop, |
| src.fBounds.fRight, src.fBounds.fBottom, radius); |
| |
| SkBlurMask::Blur(&dst, src, radius, SkBlurMask::kNormal_Style); |
| uint8_t* dstPtr = dst.fImage; |
| |
| for (int y = 0; y < dst.fBounds.height(); y++) { |
| for (int x = 0; x < dst.fBounds.width(); x++) { |
| printf(" %02X", dstPtr[x]); |
| } |
| printf("\n"); |
| dstPtr += dst.fRowBytes; |
| } |
| } |
| } |
| } |
| #endif |
| |
| static void scale_to_width(SkPath* path, SkScalar dstWidth) { |
| const SkRect& bounds = path->getBounds(); |
| SkScalar scale = dstWidth / bounds.width(); |
| SkMatrix matrix; |
| |
| matrix.setScale(scale, scale); |
| path->transform(matrix); |
| } |
| |
| static const struct { |
| SkPaint::Style fStyle; |
| SkPaint::Join fJoin; |
| int fStrokeWidth; |
| } gRec[] = { |
| { SkPaint::kFill_Style, SkPaint::kMiter_Join, 0 }, |
| { SkPaint::kStroke_Style, SkPaint::kMiter_Join, 0 }, |
| { SkPaint::kStroke_Style, SkPaint::kMiter_Join, 10 }, |
| { SkPaint::kStrokeAndFill_Style, SkPaint::kMiter_Join, 10 }, |
| }; |
| |
| class StrokePathView : public Sample { |
| SkScalar fWidth; |
| SkPath fPath; |
| protected: |
| void onOnceBeforeDraw() override { |
| // test_blur(); |
| fWidth = SkIntToScalar(120); |
| |
| #if 0 |
| const char str[] = |
| "M 0, 3" |
| "C 10, -10, 30, -10, 0, 28" |
| "C -30, -10, -10, -10, 0, 3" |
| "Z"; |
| SkParsePath::FromSVGString(str, &fPath); |
| #else |
| fPath.addCircle(0, 0, SkIntToScalar(50), SkPathDirection::kCW); |
| fPath.addCircle(0, SkIntToScalar(-50), SkIntToScalar(30), SkPathDirection::kCW); |
| #endif |
| |
| scale_to_width(&fPath, fWidth); |
| const SkRect& bounds = fPath.getBounds(); |
| fPath.offset(-bounds.fLeft, -bounds.fTop); |
| |
| this->setBGColor(0xFFDDDDDD); |
| } |
| |
| SkString name() override { return SkString("StrokePath"); } |
| |
| SkRandom rand; |
| |
| void drawSet(SkCanvas* canvas, SkPaint* paint) { |
| SkAutoCanvasRestore acr(canvas, true); |
| |
| for (size_t i = 0; i < SK_ARRAY_COUNT(gRec); i++) { |
| paint->setStyle(gRec[i].fStyle); |
| paint->setStrokeJoin(gRec[i].fJoin); |
| paint->setStrokeWidth(SkIntToScalar(gRec[i].fStrokeWidth)); |
| canvas->drawPath(fPath, *paint); |
| canvas->translate(fWidth * 5 / 4, 0); |
| } |
| } |
| |
| void onDrawContent(SkCanvas* canvas) override { |
| test_huge_stroke(canvas); |
| #if 0 |
| canvas->translate(SkIntToScalar(10), SkIntToScalar(10)); |
| |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| |
| if (true) { |
| canvas->drawColor(SK_ColorBLACK); |
| |
| SkFont font(nullptr, 24); |
| paint.setColor(SK_ColorWHITE); |
| canvas->translate(10, 30); |
| |
| static const SkBlurStyle gStyle[] = { |
| kNormal_SkBlurStyle, |
| kInner_SkBlurStyle, |
| kOuter_SkBlurStyle, |
| kSolid_SkBlurStyle, |
| }; |
| for (int x = 0; x < 5; x++) { |
| SkScalar sigma = SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(4)); |
| for (int y = 0; y < 10; y++) { |
| if (x) { |
| paint.setMaskFilter(SkMaskFilter::MakeBlur(gStyle[x - 1], sigma)); |
| } |
| canvas->drawString("Title Bar", x * 100.0f, y * 30.0f, font, paint); |
| sigma *= 0.75f; |
| } |
| |
| } |
| return; |
| } |
| |
| paint.setColor(SK_ColorBLUE); |
| |
| #if 1 |
| SkPath p; |
| float r = rand.nextUScalar1() + 0.5f; |
| SkScalar x = 0, y = 0; |
| p.moveTo(x, y); |
| #if 0 |
| p.cubicTo(x-75*r, y+75*r, x-40*r, y+125*r, x, y+85*r); |
| p.cubicTo(x+40*r, y+125*r, x+75*r, y+75*r, x, y); |
| #else |
| p.cubicTo(x+75*r, y+75*r, x+40*r, y+125*r, x, y+85*r); |
| p.cubicTo(x-40*r, y+125*r, x-75*r, y+75*r, x, y); |
| #endif |
| p.close(); |
| fPath = p; |
| fPath.offset(100, 0); |
| #endif |
| |
| fPath.setFillType(SkPathFillType::kWinding); |
| drawSet(canvas, &paint); |
| |
| canvas->translate(0, fPath.getBounds().height() * 5 / 4); |
| fPath.setFillType(SkPathFillType::kEvenOdd); |
| drawSet(canvas, &paint); |
| #endif |
| } |
| |
| private: |
| using INHERITED = Sample; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_SAMPLE( return new StrokePathView(); ) |