C++ SkPaint::setFlags方法代码示例

void HelloWorldWindow::drawContents(SkCanvas* canvas) {
    // Clear background
    canvas->drawColor(SK_ColorWHITE);

    SkPaint paint;
    paint.setColor(SK_ColorRED);

    // Draw a rectangle with red paint
    SkRect rect = SkRect::MakeXYWH(10, 10, 128, 128);
    canvas->drawRect(rect, paint);

    // Set up a linear gradient and draw a circle
    {
        SkPoint linearPoints[] = {
                {0, 0},
                {300, 300}
        };
        SkColor linearColors[] = {SK_ColorGREEN, SK_ColorBLACK};

        paint.setShader(SkGradientShader::MakeLinear(
                linearPoints, linearColors, nullptr, 2,
                SkShader::kMirror_TileMode));
        paint.setFlags(SkPaint::kAntiAlias_Flag);

        canvas->drawCircle(200, 200, 64, paint);

        // Detach shader
        paint.setShader(nullptr);
    }

    // Draw a message with a nice black paint.
    paint.setFlags(
            SkPaint::kAntiAlias_Flag |
            SkPaint::kSubpixelText_Flag |  // ... avoid waggly text when rotating.
            SkPaint::kUnderlineText_Flag);
    paint.setColor(SK_ColorBLACK);
    paint.setTextSize(20);

    canvas->save();

    static const char message[] = "Hello World";

    // Translate and rotate
    canvas->translate(300, 300);
    fRotationAngle += 0.2f;
    if (fRotationAngle > 360) {
        fRotationAngle -= 360;
    }
    canvas->rotate(fRotationAngle);

    // Draw the text:
    canvas->drawText(message, strlen(message), 0, 0, paint);

    canvas->restore();
}

SkRect Text::onRevalidate(InvalidationController*, const SkMatrix&) {
    // TODO: we could potentially track invals which don't require rebuilding the blob.

    SkPaint font;
    font.setFlags(fFlags);
    font.setTypeface(fTypeface);
    font.setTextSize(fSize);
    font.setTextScaleX(fScaleX);
    font.setTextSkewX(fSkewX);
    font.setTextAlign(fAlign);
    font.setHinting(fHinting);

    // First, convert to glyphIDs.
    font.setTextEncoding(SkPaint::kUTF8_TextEncoding);
    SkSTArray<256, SkGlyphID, true> glyphs;
    glyphs.reset(font.textToGlyphs(fText.c_str(), fText.size(), nullptr));
    SkAssertResult(font.textToGlyphs(fText.c_str(), fText.size(), glyphs.begin()) == glyphs.count());
    font.setTextEncoding(SkPaint::kGlyphID_TextEncoding);

    // Next, build the cached blob.
    SkTextBlobBuilder builder;
    const auto& buf = builder.allocRun(font, glyphs.count(), 0, 0, nullptr);
    if (!buf.glyphs) {
        fBlob.reset();
        return SkRect::MakeEmpty();
    }

    memcpy(buf.glyphs, glyphs.begin(), glyphs.count() * sizeof(SkGlyphID));

    fBlob = builder.make();
    return fBlob
        ? fBlob->bounds().makeOffset(fPosition.x(), fPosition.y())
        : SkRect::MakeEmpty();
}

    virtual void onDrawContent(SkCanvas* canvas) {
        const char* str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
        SkPaint paint;
        SkScalar    x = SkIntToScalar(10);
        SkScalar    y = SkIntToScalar(20);

        paint.setFlags(0x105);

        paint.setARGB(fByte, 0xFF, 0xFF, 0xFF);

        paint.setMaskFilter(SkBlurMaskFilter::Create(SkIntToScalar(3),
                                        SkBlurMaskFilter::kNormal_BlurStyle));
        paint.getMaskFilter()->unref();

        SkRandom rand;

        for (int ps = 6; ps <= 35; ps++) {
            paint.setColor(rand.nextU() | (0xFF << 24));
            paint.setTextSize(SkIntToScalar(ps));
            paint.setTextSize(SkIntToScalar(24));
            canvas->drawText(str, strlen(str), x, y, paint);
            y += paint.getFontMetrics(NULL);
        }
        if (false) { // avoid bit rot, suppress warning
            check_for_nonwhite(canvas->getDevice()->accessBitmap(false), fByte);
            SkDebugf("------ byte %x\n", fByte);
        }

        if (false) {
            fByte += 1;
            fByte &= 0xFF;
            this->inval(NULL);
        }
    }

static void drawmarshmallow(SkCanvas* canvas) {
    SkBitmap bitmap;
    SkPaint paint;
    SkRect r;
    SkMatrix m;

    SkImageDecoder::DecodeFile("/Users/reed/Downloads/3elfs.jpg", &bitmap);
    if (!bitmap.pixelRef()) {
        return;
    }

    SkShader* s = SkShader::CreateBitmapShader(bitmap,
                                               SkShader::kRepeat_TileMode,
                                               SkShader::kRepeat_TileMode);
    paint.setShader(s)->unref();
    m.setTranslate(SkIntToScalar(250), SkIntToScalar(134));
    s->setLocalMatrix(m);

    r.set(SkIntToScalar(250),
          SkIntToScalar(134),
          SkIntToScalar(250 + 449),
          SkIntToScalar(134 + 701));
    paint.setFlags(2);

    canvas->drawRect(r, paint);
}

void GrStencilAndCoverTextContext::uncachedDrawTextBlob(GrContext* context,
                                                        GrDrawContext* dc,
                                                        const GrClip& clip,
                                                        const SkPaint& skPaint,
                                                        const SkMatrix& viewMatrix,
                                                        const SkSurfaceProps& props,
                                                        const SkTextBlob* blob,
                                                        SkScalar x, SkScalar y,
                                                        SkDrawFilter* drawFilter,
                                                        const SkIRect& clipBounds) {
    SkPaint runPaint = skPaint;

    SkTextBlobRunIterator it(blob);
    for (;!it.done(); it.next()) {
        size_t textLen = it.glyphCount() * sizeof(uint16_t);
        const SkPoint& offset = it.offset();

        // applyFontToPaint() always overwrites the exact same attributes,
        // so it is safe to not re-seed the paint for this reason.
        it.applyFontToPaint(&runPaint);

        if (drawFilter && !drawFilter->filter(&runPaint, SkDrawFilter::kText_Type)) {
            // A false return from filter() means we should abort the current draw.
            runPaint = skPaint;
            continue;
        }

        runPaint.setFlags(GrTextUtils::FilterTextFlags(props, runPaint));

        GrPaint grPaint;
        if (!SkPaintToGrPaint(context, dc, runPaint, viewMatrix, &grPaint)) {
            return;
        }

        switch (it.positioning()) {
            case SkTextBlob::kDefault_Positioning:
                this->drawText(context, dc, clip, grPaint, runPaint, viewMatrix, props,
                               (const char *)it.glyphs(),
                               textLen, x + offset.x(), y + offset.y(), clipBounds);
                break;
            case SkTextBlob::kHorizontal_Positioning:
                this->drawPosText(context, dc, clip, grPaint, runPaint, viewMatrix, props,
                                  (const char*)it.glyphs(),
                                  textLen, it.pos(), 1, SkPoint::Make(x, y + offset.y()),
                                  clipBounds);
                break;
            case SkTextBlob::kFull_Positioning:
                this->drawPosText(context, dc, clip, grPaint, runPaint, viewMatrix, props,
                                  (const char*)it.glyphs(),
                                  textLen, it.pos(), 2, SkPoint::Make(x, y), clipBounds);
                break;
        }

        if (drawFilter) {
            // A draw filter may change the paint arbitrarily, so we must re-seed in this case.
            runPaint = skPaint;
        }
    }
}

void LinkHighlight::paintContents(WebCanvas* canvas, const WebRect&, WebContentLayerClient::PaintingControlSetting paintingControl)
{
    if (!m_node || !m_node->layoutObject())
        return;

    SkPaint paint;
    paint.setStyle(SkPaint::kFill_Style);
    paint.setFlags(SkPaint::kAntiAlias_Flag);
    paint.setColor(m_node->layoutObject()->style()->tapHighlightColor().rgb());
    canvas->drawPath(m_path.skPath(), paint);
}

    static void make_textstrip(SkBitmap* bm) {
        bm->setConfig(SkBitmap::kRGB_565_Config, 200, 18);
        bm->allocPixels();
        bm->eraseColor(SK_ColorWHITE);

        SkCanvas    canvas(*bm);
        SkPaint     paint;
        const char* s = "Lorem ipsum dolor sit amet, consectetuer adipiscing elit";

        paint.setFlags(paint.getFlags() | SkPaint::kAntiAlias_Flag
                                        | SkPaint::kDevKernText_Flag);
        paint.setTextSize(SkIntToScalar(14));
        canvas.drawText(s, strlen(s), SkIntToScalar(8), SkIntToScalar(14), paint);
    }

static void paintOp_rp(SkCanvas*, SkReader32* reader, uint32_t op32,
                       SkGPipeState* state) {
    size_t offset = reader->offset();
    size_t stop = offset + PaintOp_unpackData(op32);
    SkPaint* p = state->editPaint();

    do {
        uint32_t p32 = reader->readU32();
        unsigned op = PaintOp_unpackOp(p32);
        unsigned data = PaintOp_unpackData(p32);

//        SkDebugf(" read %08X op=%d flags=%d data=%d\n", p32, op, done, data);

        switch (op) {
            case kReset_PaintOp: p->reset(); break;
            case kFlags_PaintOp: p->setFlags(data); break;
            case kColor_PaintOp: p->setColor(reader->readU32()); break;
            case kFilterLevel_PaintOp: p->setFilterQuality((SkFilterQuality)data); break;
            case kStyle_PaintOp: p->setStyle((SkPaint::Style)data); break;
            case kJoin_PaintOp: p->setStrokeJoin((SkPaint::Join)data); break;
            case kCap_PaintOp: p->setStrokeCap((SkPaint::Cap)data); break;
            case kWidth_PaintOp: p->setStrokeWidth(reader->readScalar()); break;
            case kMiter_PaintOp: p->setStrokeMiter(reader->readScalar()); break;
            case kEncoding_PaintOp:
                p->setTextEncoding((SkPaint::TextEncoding)data);
                break;
            case kHinting_PaintOp: p->setHinting((SkPaint::Hinting)data); break;
            case kAlign_PaintOp: p->setTextAlign((SkPaint::Align)data); break;
            case kTextSize_PaintOp: p->setTextSize(reader->readScalar()); break;
            case kTextScaleX_PaintOp: p->setTextScaleX(reader->readScalar()); break;
            case kTextSkewX_PaintOp: p->setTextSkewX(reader->readScalar()); break;

            case kFlatIndex_PaintOp: {
                PaintFlats pf = (PaintFlats)PaintOp_unpackFlags(p32);
                unsigned index = data;
                set_paintflat(p, state->getFlat(index), pf);
                break;
            }

            case kTypeface_PaintOp:
                SkASSERT(SkToBool(state->getFlags() &
                                  SkGPipeWriter::kCrossProcess_Flag));
                p->setTypeface(state->getTypeface(data));
                break;
            default: SkDEBUGFAIL("bad paintop"); return;
        }
        SkASSERT(reader->offset() <= stop);
    } while (reader->offset() < stop);
}

void LinkHighlightImpl::paintContents(WebDisplayItemList* webDisplayItemList, WebContentLayerClient::PaintingControlSetting paintingControl)
{
    if (!m_node || !m_node->layoutObject())
        return;

    SkPictureRecorder recorder;
    gfx::Rect visualRect = paintableRegion();
    SkCanvas* canvas = recorder.beginRecording(visualRect.width(), visualRect.height());

    SkPaint paint;
    paint.setStyle(SkPaint::kFill_Style);
    paint.setFlags(SkPaint::kAntiAlias_Flag);
    paint.setColor(m_node->layoutObject()->style()->tapHighlightColor().rgb());
    canvas->drawPath(m_path.getSkPath(), paint);

    webDisplayItemList->appendDrawingItem(WebRect(visualRect.x(), visualRect.y(),
                                          visualRect.width(), visualRect.height()), recorder.finishRecordingAsPicture());
}

void SkBaseDevice::drawTextBlob(const SkDraw& draw, const SkTextBlob* blob, SkScalar x, SkScalar y,
                                const SkPaint &paint, SkDrawFilter* drawFilter) {

    SkPaint runPaint = paint;

    SkTextBlobRunIterator it(blob);
    for (;!it.done(); it.next()) {
        size_t textLen = it.glyphCount() * sizeof(uint16_t);
        const SkPoint& offset = it.offset();
        // applyFontToPaint() always overwrites the exact same attributes,
        // so it is safe to not re-seed the paint for this reason.
        it.applyFontToPaint(&runPaint);

        if (drawFilter && !drawFilter->filter(&runPaint, SkDrawFilter::kText_Type)) {
            // A false return from filter() means we should abort the current draw.
            runPaint = paint;
            continue;
        }

        runPaint.setFlags(this->filterTextFlags(runPaint));

        switch (it.positioning()) {
        case SkTextBlob::kDefault_Positioning:
            this->drawText(draw, it.glyphs(), textLen, x + offset.x(), y + offset.y(), runPaint);
            break;
        case SkTextBlob::kHorizontal_Positioning:
            this->drawPosText(draw, it.glyphs(), textLen, it.pos(), 1,
                              SkPoint::Make(x, y + offset.y()), runPaint);
            break;
        case SkTextBlob::kFull_Positioning:
            this->drawPosText(draw, it.glyphs(), textLen, it.pos(), 2,
                              SkPoint::Make(x, y), runPaint);
            break;
        default:
            SkFAIL("unhandled positioning mode");
        }

        if (drawFilter) {
            // A draw filter may change the paint arbitrarily, so we must re-seed in this case.
            runPaint = paint;
        }
    }
}

void LinkHighlightImpl::paintContents(WebDisplayItemList* webDisplayItemList, const WebRect& webClipRect, WebContentLayerClient::PaintingControlSetting paintingControl)
{
    if (!m_node || !m_node->layoutObject())
        return;

    SkPictureRecorder recorder;
    SkCanvas* canvas = recorder.beginRecording(webClipRect.width, webClipRect.height);
    canvas->translate(-webClipRect.x, -webClipRect.y);

    SkPaint paint;
    paint.setStyle(SkPaint::kFill_Style);
    paint.setFlags(SkPaint::kAntiAlias_Flag);
    paint.setColor(m_node->layoutObject()->style()->tapHighlightColor().rgb());
    canvas->drawPath(m_path.skPath(), paint);

    RefPtr<const SkPicture> picture = adoptRef(recorder.endRecording());
    // TODO(wkorman): Pass actual visual rect with the drawing item.
    webDisplayItemList->appendDrawingItem(IntRect(), picture.get());
}

    virtual void onDrawContent(SkCanvas* canvas) {
        SkAutoCanvasRestore restore(canvas, false);
        {
            SkRect r;
            r.set(0, 0, SkIntToScalar(1000), SkIntToScalar(20));
       //     canvas->saveLayer(&r, NULL, SkCanvas::kHasAlphaLayer_SaveFlag);
        }

        SkPaint paint;
//        const uint16_t glyphs[] = { 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19 };
        int         index = fHints % SK_ARRAY_COUNT(gHints);
        index = 1;
//        const char* style = gHints[index].fName;

//        canvas->translate(0, SkIntToScalar(50));

  //      canvas->drawText(style, strlen(style), SkIntToScalar(20), SkIntToScalar(20), paint);

        SkSafeUnref(paint.setTypeface(SkTypeface::CreateFromFile("/skimages/samplefont.ttf")));
        paint.setAntiAlias(true);
        paint.setFlags(paint.getFlags() | gHints[index].fFlags);

        SkRect clip;
        clip.set(SkIntToScalar(25), SkIntToScalar(34), SkIntToScalar(88), SkIntToScalar(155));

        const char* text = "Hamburgefons";
        size_t length = strlen(text);

        SkScalar y = SkIntToScalar(0);
        for (int i = 9; i <= 24; i++) {
            paint.setTextSize(SkIntToScalar(i) /*+ (gRand.nextU() & 0xFFFF)*/);
            for (SkScalar dx = 0; dx <= SkIntToScalar(3)/4;
                                            dx += SkIntToScalar(1) /* /4 */) {
                y += paint.getFontSpacing();
                DrawTheText(canvas, text, length, SkIntToScalar(20) + dx, y,
                            paint, fClickX, fMF);
            }
        }
        if (gHints[index].fFlushCache) {
//                SkGraphics::SetFontCacheUsed(0);
        }
    }

void GrAtlasTextBlob::flushRunAsPaths(GrContext* context, GrDrawContext* dc,
                                      const SkSurfaceProps& props,
                                      const SkTextBlobRunIterator& it,
                                      const GrClip& clip, const SkPaint& skPaint,
                                      SkDrawFilter* drawFilter, const SkMatrix& viewMatrix,
                                      const SkIRect& clipBounds, SkScalar x, SkScalar y) {
    SkPaint runPaint = skPaint;

    size_t textLen = it.glyphCount() * sizeof(uint16_t);
    const SkPoint& offset = it.offset();

    it.applyFontToPaint(&runPaint);

    if (drawFilter && !drawFilter->filter(&runPaint, SkDrawFilter::kText_Type)) {
        return;
    }

    runPaint.setFlags(GrTextUtils::FilterTextFlags(props, runPaint));

    switch (it.positioning()) {
        case SkTextBlob::kDefault_Positioning:
            GrTextUtils::DrawTextAsPath(context, dc, clip, runPaint, viewMatrix,
                                        (const char *)it.glyphs(),
                                        textLen, x + offset.x(), y + offset.y(), clipBounds);
            break;
        case SkTextBlob::kHorizontal_Positioning:
            GrTextUtils::DrawPosTextAsPath(context, dc, props, clip, runPaint, viewMatrix,
                                           (const char*)it.glyphs(),
                                           textLen, it.pos(), 1, SkPoint::Make(x, y + offset.y()),
                                           clipBounds);
            break;
        case SkTextBlob::kFull_Positioning:
            GrTextUtils::DrawPosTextAsPath(context, dc, props, clip, runPaint, viewMatrix,
                                           (const char*)it.glyphs(),
                                           textLen, it.pos(), 2, SkPoint::Make(x, y), clipBounds);
            break;
    }
}

    void onDrawContent(SkCanvas* canvas) override {
        const char* str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
        SkPaint paint;
        SkScalar    x = SkIntToScalar(10);
        SkScalar    y = SkIntToScalar(20);

        paint.setFlags(0x105);

        paint.setARGB(fByte, 0xFF, 0xFF, 0xFF);

        paint.setMaskFilter(SkBlurMaskFilter::Create(kNormal_SkBlurStyle,
                                    SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(3))));
        paint.getMaskFilter()->unref();

        SkRandom rand;

        for (int ps = 6; ps <= 35; ps++) {
            paint.setColor(rand.nextU() | (0xFF << 24));
            paint.setTextSize(SkIntToScalar(ps));
            paint.setTextSize(SkIntToScalar(24));
            canvas->drawText(str, strlen(str), x, y, paint);
            y += paint.getFontMetrics(nullptr);
        }
    }

DEF_TEST(Paint_flattening, reporter) {
    const SkFilterQuality levels[] = {
        kNone_SkFilterQuality,
        kLow_SkFilterQuality,
        kMedium_SkFilterQuality,
        kHigh_SkFilterQuality,
    };
    const SkPaint::Hinting hinting[] = {
        SkPaint::kNo_Hinting,
        SkPaint::kSlight_Hinting,
        SkPaint::kNormal_Hinting,
        SkPaint::kFull_Hinting,
    };
    const SkPaint::Align align[] = {
        SkPaint::kLeft_Align,
        SkPaint::kCenter_Align,
        SkPaint::kRight_Align
    };
    const SkPaint::Cap caps[] = {
        SkPaint::kButt_Cap,
        SkPaint::kRound_Cap,
        SkPaint::kSquare_Cap,
    };
    const SkPaint::Join joins[] = {
        SkPaint::kMiter_Join,
        SkPaint::kRound_Join,
        SkPaint::kBevel_Join,
    };
    const SkPaint::TextEncoding encodings[] = {
        SkPaint::kUTF8_TextEncoding,
        SkPaint::kUTF16_TextEncoding,
        SkPaint::kUTF32_TextEncoding,
        SkPaint::kGlyphID_TextEncoding,
    };
    const SkPaint::Style styles[] = {
        SkPaint::kFill_Style,
        SkPaint::kStroke_Style,
        SkPaint::kStrokeAndFill_Style,
    };

#define FOR_SETUP(index, array, setter)                                 \
    for (size_t index = 0; index < SK_ARRAY_COUNT(array); ++index) {    \
        paint.setter(array[index]);                                     \

    SkPaint paint;
    paint.setFlags(0x1234);

    FOR_SETUP(i, levels, setFilterQuality)
    FOR_SETUP(j, hinting, setHinting)
    FOR_SETUP(k, align, setTextAlign)
    FOR_SETUP(l, caps, setStrokeCap)
    FOR_SETUP(m, joins, setStrokeJoin)
    FOR_SETUP(n, encodings, setTextEncoding)
    FOR_SETUP(p, styles, setStyle)

    SkWriteBuffer writer;
    paint.flatten(writer);

    const uint32_t* written = writer.getWriter32()->contiguousArray();
    SkReadBuffer reader(written, writer.bytesWritten());

    SkPaint paint2;
    paint2.unflatten(reader);
    REPORTER_ASSERT(reporter, paint2 == paint);

    }}}}}}}