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- /*
- * 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);
- SkMatrix matrix;
- matrix.setRectToRect(srcR, dstR, SkMatrix::kCenter_ScaleToFit);
- canvas->concat(matrix);
- 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), SkPath::kCW_Direction);
- fPath.addCircle(0, SkIntToScalar(-50), SkIntToScalar(30), SkPath::kCW_Direction);
- #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); return;
- 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(SkPath::kWinding_FillType);
- drawSet(canvas, &paint);
- canvas->translate(0, fPath.getBounds().height() * 5 / 4);
- fPath.setFillType(SkPath::kEvenOdd_FillType);
- drawSet(canvas, &paint);
- }
- private:
- typedef Sample INHERITED;
- };
- //////////////////////////////////////////////////////////////////////////////
- DEF_SAMPLE( return new StrokePathView(); )
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