예제 #1
0
파일: SkDevice.cpp 프로젝트: OwenTan/skia
void SkBaseDevice::drawAtlas(const SkDraw& draw, const SkImage* atlas, const SkRSXform xform[],
                             const SkRect tex[], const SkColor colors[], int count,
                             SkXfermode::Mode mode, const SkPaint& paint) {
    SkPath path;
    path.setIsVolatile(true);

    for (int i = 0; i < count; ++i) {
        SkPoint quad[4];
        xform[i].toQuad(tex[i].width(), tex[i].height(), quad);

        SkMatrix localM;
        localM.setRSXform(xform[i]);
        localM.preTranslate(-tex[i].left(), -tex[i].top());

        SkPaint pnt(paint);
        sk_sp<SkShader> shader = atlas->makeShader(SkShader::kClamp_TileMode,
                                                   SkShader::kClamp_TileMode,
                                                   &localM);
        if (!shader) {
            break;
        }
        pnt.setShader(std::move(shader));

        if (colors) {
            pnt.setColorFilter(SkColorFilter::MakeModeFilter(colors[i], mode));
        }

        path.rewind();
        path.addPoly(quad, 4, true);
        path.setConvexity(SkPath::kConvex_Convexity);
        this->drawPath(draw, path, pnt, nullptr, true);
    }
}
예제 #2
0
void SkBaseDevice::drawAtlas(const SkDraw& draw, const SkImage* atlas, const SkRSXform xform[],
                             const SkRect tex[], const SkColor colors[], int count,
                             SkXfermode::Mode mode, const SkPaint& paint) {
    SkPath path;
    path.setIsVolatile(true);

    for (int i = 0; i < count; ++i) {
        SkPoint quad[4];
        xform[i].toQuad(tex[i].width(), tex[i].height(), quad);
        
        SkMatrix localM;
        localM.setRSXform(xform[i]);
        localM.preTranslate(-tex[i].left(), -tex[i].top());

        SkPaint pnt(paint);
        pnt.setShader(atlas->newShader(SkShader::kClamp_TileMode, SkShader::kClamp_TileMode,
                                       &localM))->unref();
        if (colors && colors[i] != SK_ColorWHITE) {
            SkAutoTUnref<SkColorFilter> cf(SkColorFilter::CreateModeFilter(colors[i], mode));
            pnt.setColorFilter(cf);
        }
        
        path.rewind();
        path.addPoly(quad, 4, true);
        path.setConvexity(SkPath::kConvex_Convexity);
        this->drawPath(draw, path, pnt, NULL, true);
    }
}
예제 #3
0
    void onDraw(SkCanvas* canvas) override {
        SkPaint p;
        p.setColor(SK_ColorRED);
        p.setAntiAlias(true);

        canvas->clear(0xFFFFFFFF);

        canvas->save();

        SkScalar y = 0;

        canvas->translate(0, y);
        canvas->rotate(1);
        canvas->drawRect({ 20, 20, 200, 200 }, p);
        canvas->restore();

        y += 200;

        canvas->translate(0, y);
        canvas->rotate(1);
        canvas->drawRect({ 20, 20, 20.2f, 200 }, p);
        canvas->drawRect({ 20, 200, 200, 200.1f }, p);
        canvas->drawCircle(100, 100, 30, p);
        canvas->restore();

        // The following path is empty but it'll reveal bug chrome:662914
        SkPath path;
        path.moveTo(SkBits2Float(0x429b9d5c), SkBits2Float(0x4367a041));  // 77.8073f, 231.626f
        // 77.8075f, 231.626f, 77.8074f, 231.625f, 77.8073f, 231.625f
        path.cubicTo(SkBits2Float(0x429b9d71), SkBits2Float(0x4367a022),
                SkBits2Float(0x429b9d64), SkBits2Float(0x4367a009),
                SkBits2Float(0x429b9d50), SkBits2Float(0x43679ff2));
        path.lineTo(SkBits2Float(0x429b9d5c), SkBits2Float(0x4367a041));  // 77.8073f, 231.626f
        path.close();
        canvas->drawPath(path, p);

        // The following path reveals a subtle SkAnalyticQuadraticEdge::updateQuadratic bug:
        // we should not use any snapped y for the intermediate values whose error may accumulate;
        // snapping should only be allowed once before updateLine.
        path.reset();
        path.moveTo(SkBits2Float(0x434ba71e), SkBits2Float(0x438a06d0));  // 203.653f, 276.053f
        path.lineTo(SkBits2Float(0x43492a74), SkBits2Float(0x4396d70d));  // 201.166f, 301.68f
        // 200.921f, 304.207f, 196.939f, 303.82f, 0.707107f
        path.conicTo(SkBits2Float(0x4348ebaf), SkBits2Float(0x43981a75),
                SkBits2Float(0x4344f079), SkBits2Float(0x4397e900), SkBits2Float(0x3f3504f3));
        path.close();
        // Manually setting convexity is required. Otherwise, this path will be considered concave.
        path.setConvexity(SkPath::kConvex_Convexity);
        canvas->drawPath(path, p);

        // skbug.com/7573
        y += 200;
        canvas->translate(0, y);
        p.setAntiAlias(true);
        path.reset();
        path.moveTo(1.98009784f, 9.0162744f);
        path.lineTo(47.843992f, 10.1922744f);
        path.lineTo(47.804008f, 11.7597256f);
        path.lineTo(1.93990216f, 10.5837256f);
        canvas->drawPath(path, p);
        canvas->restore();
    }