C++ SkPaint::setFakeBoldText方法代码示例

void draw(SkCanvas* canvas) {
    SkPaint paint;
    paint.setAntiAlias(true);
    paint.setTextSize(40);
    canvas->drawString("OjYy_-", 10, 35, paint);
    paint.setFakeBoldText(true);
    canvas->drawString("OjYy_-", 10, 75, paint);
    // create a custom fake bold by varying the stroke width
    paint.setFakeBoldText(false);
    paint.setStyle(SkPaint::kStrokeAndFill_Style);
    paint.setStrokeWidth(40.f / 48);
    canvas->drawString("OjYy_-", 10, 115, paint);
}

void draw(SkCanvas* canvas) {
    SkPaint paint;
    SkDebugf("paint.isFakeBoldText() %c= !!(paint.getFlags() & SkPaint::kFakeBoldText_Flag)\n",
        paint.isFakeBoldText() == !!(paint.getFlags() & SkPaint::kFakeBoldText_Flag) ? '=' : '!');
    paint.setFakeBoldText(true);
    SkDebugf("paint.isFakeBoldText() %c= !!(paint.getFlags() & SkPaint::kFakeBoldText_Flag)\n",
        paint.isFakeBoldText() == !!(paint.getFlags() & SkPaint::kFakeBoldText_Flag) ? '=' : '!');
}

static SkPaint make_paint() {
    SkPaint paint;
    if (fuzz->exhausted()) {
        return paint;
    }
    paint.setHinting(make_paint_hinting());
    paint.setAntiAlias(make_bool());
    paint.setDither(make_bool());
    paint.setLinearText(make_bool());
    paint.setSubpixelText(make_bool());
    paint.setLCDRenderText(make_bool());
    paint.setEmbeddedBitmapText(make_bool());
    paint.setAutohinted(make_bool());
    paint.setVerticalText(make_bool());
    paint.setFakeBoldText(make_bool());
    paint.setDevKernText(make_bool());
    paint.setFilterQuality(make_filter_quality());
    paint.setStyle(make_paint_style());
    paint.setColor(make_color());
    paint.setStrokeWidth(make_number(false));
    paint.setStrokeMiter(make_number(false));
    paint.setStrokeCap(make_paint_cap());
    paint.setStrokeJoin(make_paint_join());
    paint.setColorFilter(make_color_filter());
    paint.setBlendMode(make_blendmode());
    paint.setPathEffect(make_path_effect());
    paint.setMaskFilter(make_mask_filter());

    if (false) {
        // our validating buffer does not support typefaces yet, so skip this for now
        paint.setTypeface(SkTypeface::MakeFromName(make_font_name().c_str(),make_typeface_style()));
    }

    SkLayerRasterizer::Builder rasterizerBuilder;
    SkPaint paintForRasterizer;
    if (make_bool()) {
        paintForRasterizer = make_paint();
    }
    rasterizerBuilder.addLayer(paintForRasterizer);
    paint.setRasterizer(rasterizerBuilder.detach());
    paint.setImageFilter(make_image_filter());
    bool a, b, c;
    fuzz->next(&a, &b, &c);
    sk_sp<SkData> data(make_3Dlut(nullptr, a, b, c));
    paint.setTextAlign(make_paint_align());
    SkScalar d, e, f;
    fuzz->next(&d, &e, &f);
    paint.setTextSize(d);
    paint.setTextScaleX(e);
    paint.setTextSkewX(f);
    paint.setTextEncoding(make_paint_text_encoding());
    return paint;
}

static void fuzz_drawText(Fuzz* fuzz, sk_sp<SkTypeface> font) {
    SkPaint p;
    init_paint(fuzz, &p);
    sk_sp<SkSurface> surface;
    init_surface(fuzz, &surface);

    char text[kTxtLen];
    init_string(fuzz, text, kTxtLen);

    SkScalar x, y;
    fuzz->next(&x, &y);
    // populate pts array
    SkPoint pts[kPtsLen];
    for (uint8_t i = 0; i < kPtsLen; ++i) {
        pts[i].set(x, y);
        x += p.getTextSize();
    }

    p.setTypeface(font);
    // set text related attributes
    bool b;
    fuzz->next(&b);
    p.setAutohinted(b);
    fuzz->next(&b);
    p.setDevKernText(b);
    fuzz->next(&b);
    p.setEmbeddedBitmapText(b);
    fuzz->next(&b);
    p.setFakeBoldText(b);
    fuzz->next(&b);
    p.setLCDRenderText(b);
    fuzz->next(&b);
    p.setLinearText(b);
    fuzz->next(&b);
    p.setSubpixelText(b);
    fuzz->next(&x);
    p.setTextScaleX(x);
    fuzz->next(&x);
    p.setTextSkewX(x);
    fuzz->next(&x);
    p.setTextSize(x);
    fuzz->next(&b);
    p.setVerticalText(b);

    SkCanvas* cnv = surface->getCanvas();
    cnv->drawPosText(text, (kTxtLen-1), pts, p);

    fuzz->next(&x);
    fuzz->next(&y);
    cnv->drawText(text, (kTxtLen-1), x, y, p);
}

static SkPaint make_paint() {
    SkPaint paint;
    paint.setHinting(make_paint_hinting());
    paint.setAntiAlias(make_bool());
    paint.setDither(make_bool());
    paint.setLinearText(make_bool());
    paint.setSubpixelText(make_bool());
    paint.setLCDRenderText(make_bool());
    paint.setEmbeddedBitmapText(make_bool());
    paint.setAutohinted(make_bool());
    paint.setVerticalText(make_bool());
    paint.setUnderlineText(make_bool());
    paint.setStrikeThruText(make_bool());
    paint.setFakeBoldText(make_bool());
    paint.setDevKernText(make_bool());
    paint.setFilterQuality(make_filter_quality());
    paint.setStyle(make_paint_style());
    paint.setColor(make_color());
    paint.setStrokeWidth(make_scalar());
    paint.setStrokeMiter(make_scalar());
    paint.setStrokeCap(make_paint_cap());
    paint.setStrokeJoin(make_paint_join());
    paint.setColorFilter(make_color_filter());
    paint.setXfermodeMode(make_xfermode());
    paint.setPathEffect(make_path_effect());
    paint.setMaskFilter(make_mask_filter());

    if (false) {
        // our validating buffer does not support typefaces yet, so skip this for now
        SkAutoTUnref<SkTypeface> typeface(
                      SkTypeface::CreateFromName(make_font_name().c_str(), make_typeface_style()));
        paint.setTypeface(typeface);
    }

    SkLayerRasterizer::Builder rasterizerBuilder;
    SkPaint paintForRasterizer;
    if (R(2) == 1) {
        paintForRasterizer = make_paint();
    }
    rasterizerBuilder.addLayer(paintForRasterizer);
    paint.setRasterizer(rasterizerBuilder.detach());
    paint.setImageFilter(make_image_filter());
    sk_sp<SkData> data(make_3Dlut(nullptr, make_bool(), make_bool(), make_bool()));
    paint.setTextAlign(make_paint_align());
    paint.setTextSize(make_scalar());
    paint.setTextScaleX(make_scalar());
    paint.setTextSkewX(make_scalar());
    paint.setTextEncoding(make_paint_text_encoding());
    return paint;
}

DEF_SIMPLE_GM_BG(glyph_pos_align, canvas, kWidth, kHeight, SK_ColorBLACK) {
        SkPaint paint;
        paint.setTextSize(kTextHeight);
        paint.setFakeBoldText(true);
        const SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE };
        const SkPoint pts[] = {{0, 0}, {kWidth, kHeight}};
        paint.setShader(SkGradientShader::MakeLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors),
                                                     SkShader::kMirror_TileMode));
        paint.setTextAlign(SkPaint::kRight_Align);
        drawTestCase(canvas, "Right Align", kTextHeight, paint);

        paint.setTextAlign(SkPaint::kCenter_Align);
        drawTestCase(canvas, "Center Align", 4 * kTextHeight, paint);

        paint.setTextAlign(SkPaint::kLeft_Align);
        drawTestCase(canvas, "Left Align", 7 * kTextHeight, paint);
}

static SkPaint make_paint() {
    SkPaint paint;
    paint.setHinting(make_paint_hinting());
    paint.setAntiAlias(make_bool());
    paint.setDither(make_bool());
    paint.setLinearText(make_bool());
    paint.setSubpixelText(make_bool());
    paint.setLCDRenderText(make_bool());
    paint.setEmbeddedBitmapText(make_bool());
    paint.setAutohinted(make_bool());
    paint.setVerticalText(make_bool());
    paint.setFakeBoldText(make_bool());
    paint.setDevKernText(make_bool());
    paint.setFilterQuality(make_filter_quality());
    paint.setStyle(make_paint_style());
    paint.setColor(make_color());
    paint.setStrokeWidth(make_scalar());
    paint.setStrokeMiter(make_scalar());
    paint.setStrokeCap(make_paint_cap());
    paint.setStrokeJoin(make_paint_join());
    paint.setColorFilter(make_color_filter());
    paint.setBlendMode(make_xfermode());
    paint.setPathEffect(make_path_effect());
    paint.setMaskFilter(make_mask_filter());

    if (false) {
        // our validating buffer does not support typefaces yet, so skip this for now
        paint.setTypeface(SkTypeface::MakeFromName(make_font_name().c_str(),
                                                   make_typeface_style()));
    }

    paint.setImageFilter(make_image_filter());
    sk_sp<SkData> data(make_3Dlut(nullptr, make_bool(), make_bool(), make_bool()));
    paint.setTextAlign(make_paint_align());
    paint.setTextSize(make_scalar());
    paint.setTextScaleX(make_scalar());
    paint.setTextSkewX(make_scalar());
    paint.setTextEncoding(make_paint_text_encoding());
    return paint;
}

static void draw_vector_logo(SkCanvas* canvas, const SkRect& viewBox) {
    constexpr char kSkiaStr[] = "SKIA";
    constexpr SkScalar kGradientPad = .1f;
    constexpr SkScalar kVerticalSpacing = 0.25f;
    constexpr SkScalar kAccentScale = 1.20f;

    SkPaint paint;
    paint.setAntiAlias(true);
    paint.setSubpixelText(true);
    paint.setFakeBoldText(true);
    sk_tool_utils::set_portable_typeface(&paint);

    SkPath path;
    SkRect iBox, skiBox, skiaBox;
    paint.getTextPath("SKI", 3, 0, 0, &path);
    TightBounds(path, &skiBox);
    paint.getTextPath("I", 1, 0, 0, &path);
    TightBounds(path, &iBox);
    iBox.offsetTo(skiBox.fRight - iBox.width(), iBox.fTop);

    const size_t textLen = strlen(kSkiaStr);
    paint.getTextPath(kSkiaStr, textLen, 0, 0, &path);
    TightBounds(path, &skiaBox);
    skiaBox.outset(0, 2 * iBox.width() * (kVerticalSpacing + 1));

    const SkScalar accentSize = iBox.width() * kAccentScale;
    const SkScalar underlineY = iBox.bottom() +
        (kVerticalSpacing + SkScalarSqrt(3) / 2) * accentSize;
    SkMatrix m;
    m.setRectToRect(skiaBox, viewBox, SkMatrix::kFill_ScaleToFit);
    SkAutoCanvasRestore acr(canvas, true);
    canvas->concat(m);

    canvas->drawCircle(iBox.centerX(),
                       iBox.y() - (0.5f + kVerticalSpacing) * accentSize,
                       accentSize / 2,
                       paint);

    path.reset();
    path.moveTo(iBox.centerX() - accentSize / 2, iBox.bottom() + kVerticalSpacing * accentSize);
    path.rLineTo(accentSize, 0);
    path.lineTo(iBox.centerX(), underlineY);
    canvas->drawPath(path, paint);

    SkRect underlineRect = SkRect::MakeLTRB(iBox.centerX() - iBox.width() * accentSize * 3,
                                            underlineY,
                                            iBox.centerX(),
                                            underlineY + accentSize / 10);
    const SkPoint pts1[] = { SkPoint::Make(underlineRect.x(), 0),
                             SkPoint::Make(iBox.centerX(), 0) };
    const SkScalar pos1[] = { 0, 0.75f };
    const SkColor colors1[] = { SK_ColorTRANSPARENT, SK_ColorBLACK };
    SkASSERT(SK_ARRAY_COUNT(pos1) == SK_ARRAY_COUNT(colors1));
    paint.setShader(SkGradientShader::MakeLinear(pts1, colors1, pos1, SK_ARRAY_COUNT(pos1),
                                                 SkShader::kClamp_TileMode));
    canvas->drawRect(underlineRect, paint);

    const SkPoint pts2[] = { SkPoint::Make(iBox.x() - iBox.width() * kGradientPad, 0),
                             SkPoint::Make(iBox.right() + iBox.width() * kGradientPad, 0) };
    const SkScalar pos2[] = { 0, .01f, 1.0f/3, 1.0f/3, 2.0f/3, 2.0f/3, .99f, 1 };
    const SkColor colors2[] = {
        SK_ColorBLACK,
        0xffca5139,
        0xffca5139,
        0xff8dbd53,
        0xff8dbd53,
        0xff5460a5,
        0xff5460a5,
        SK_ColorBLACK
    };
    SkASSERT(SK_ARRAY_COUNT(pos2) == SK_ARRAY_COUNT(colors2));
    paint.setShader(SkGradientShader::MakeLinear(pts2, colors2, pos2, SK_ARRAY_COUNT(pos2),
                                                 SkShader::kClamp_TileMode));
    canvas->drawText(kSkiaStr, textLen, 0, 0, paint);
}

void drawTextOverCanvas(RenderingContext* rc, SkCanvas* cv) {
	SkRect r = SkRect::MakeLTRB(0, 0, rc->getWidth(), rc->getHeight());
	r.inset(-100, -100);
	quad_tree<TextDrawInfo*> boundsIntersect(r, 4, 0.6);

	SkPaint paintIcon;
	paintIcon.setStyle(SkPaint::kStroke_Style);
	paintIcon.setStrokeWidth(1);
	paintIcon.setColor(0xff000000);
	paintIcon.setFilterBitmap(true);
	SkPaint paintText;
	paintText.setStyle(SkPaint::kFill_Style);
	paintText.setStrokeWidth(1);
	paintText.setColor(0xff000000);
	paintText.setTextAlign(SkPaint::kCenter_Align);
    if(!sTypeface)
        sTypeface = SkTypeface::CreateFromName("Droid Serif", SkTypeface::kNormal);
	paintText.setTypeface(sTypeface);
	paintText.setAntiAlias(true);
	SkPaint::FontMetrics fm;

	// 1. Sort text using text order
	std::sort(rc->textToDraw.begin(), rc->textToDraw.end(), textOrder);
	for (uint32_t i = 0; i < rc->textToDraw.size(); i++) {
		TextDrawInfo* text = rc->textToDraw.at(i);
		if (text->text.length() > 0) {
			// sest text size before finding intersection (it is used there)
			float textSize = rc->getDensityValue(text->textSize);
			paintText.setTextSize(textSize);
			paintText.setFakeBoldText(text->bold);
			paintText.setColor(text->textColor);
			// align center y
			paintText.getFontMetrics(&fm);
			text->centerY += (-fm.fAscent);

			// calculate if there is intersection
			bool intersects = findTextIntersection(cv, rc, boundsIntersect, text, &paintText, &paintIcon);
			if (!intersects) {
				if(rc->interrupted()){
						return;
				}
				if (text->drawOnPath && text->path != NULL) {
					if (text->textShadow > 0) {
						paintText.setColor(0xFFFFFFFF);
						paintText.setStyle(SkPaint::kStroke_Style);
						paintText.setStrokeWidth(2 + text->textShadow);
						rc->nativeOperations.Pause();
						cv->drawTextOnPathHV(text->text.c_str(), text->text.length(), *text->path, text->hOffset,
								text->vOffset, paintText);
						rc->nativeOperations.Start();
						// reset
						paintText.setStyle(SkPaint::kFill_Style);
						paintText.setStrokeWidth(2);
						paintText.setColor(text->textColor);
					}
					rc->nativeOperations.Pause();
					cv->drawTextOnPathHV(text->text.c_str(), text->text.length(), *text->path, text->hOffset,
							text->vOffset, paintText);
					rc->nativeOperations.Start();
				} else {
					if (text->shieldRes.length() > 0) {
						SkBitmap* ico = getCachedBitmap(rc, text->shieldRes);
						if (ico != NULL) {
							float left = text->centerX - rc->getDensityValue(ico->width() / 2) - 0.5f;
							float top = text->centerY - rc->getDensityValue(ico->height() / 2)
									- rc->getDensityValue(4.5f);
							SkRect r = SkRect::MakeXYWH(left, top, rc->getDensityValue(ico->width()),
									rc->getDensityValue(ico->height()));
							PROFILE_NATIVE_OPERATION(rc, cv->drawBitmapRect(*ico, (SkIRect*) NULL, r, &paintIcon));
						}
					}
					drawWrappedText(rc, cv, text, textSize, paintText);
				}
			}
		}
	}
}

void drawTextOverCanvas(RenderingContext* rc, SkCanvas* cv) {
	SkRect r = SkRect::MakeLTRB(0, 0, rc->width, rc->height);
	r.inset(-100, -100);
	quad_tree<TextDrawInfo*> boundsIntersect(r, 4, 0.6);

	SkPaint paintIcon;
	paintIcon.setStyle(SkPaint::kStroke_Style);
	paintIcon.setStrokeWidth(1);
	paintIcon.setColor(0xff000000);
	SkPaint paintText;
	paintText.setStyle(SkPaint::kFill_Style);
	paintText.setStrokeWidth(1);
	paintText.setColor(0xff000000);
	paintText.setTextAlign(SkPaint::kCenter_Align);
	paintText.setTypeface(serif);
	paintText.setAntiAlias(true);
	SkPaint::FontMetrics fm;

	// 1. Sort text using text order
	std::sort(rc->textToDraw.begin(), rc->textToDraw.end(), textOrder);
	uint size = rc->textToDraw.size();
	for (uint i = 0; i < size; i++) {
		TextDrawInfo* text = rc->textToDraw.at(i);
		if (text->text.length() > 0) {
			size_t d = text->text.find(DELIM_CHAR);
			// not used now functionality
			// possibly it will be used specifying english names after that character
			if (d > 0) {
				text->text = text->text.substr(0, d);
			}

			// sest text size before finding intersection (it is used there)
			float textSize = getDensityValue(rc, text->textSize);
			paintText.setTextSize(textSize);
			paintText.setFakeBoldText(text->bold);
			paintText.setColor(text->textColor);
			// align center y
			paintText.getFontMetrics(&fm);
			text->centerY += (-fm.fAscent);

			// calculate if there is intersection
			bool intersects = findTextIntersection(cv, rc, boundsIntersect, text, &paintText, &paintIcon);
			if (!intersects) {
				if(rc->interrupted()){
						return;
				}
				if (text->drawOnPath && text->path != NULL) {
					if (text->textShadow > 0) {
						paintText.setColor(0xFFFFFFFF);
						paintText.setStyle(SkPaint::kStroke_Style);
						paintText.setStrokeWidth(2 + text->textShadow);
						rc->nativeOperations.pause();
						cv->drawTextOnPathHV(text->text.c_str(), text->text.length(), *text->path, text->hOffset,
								text->vOffset, paintText);
						rc->nativeOperations.start();
						// reset
						paintText.setStyle(SkPaint::kFill_Style);
						paintText.setStrokeWidth(2);
						paintText.setColor(text->textColor);
					}
					rc->nativeOperations.pause();
					cv->drawTextOnPathHV(text->text.c_str(), text->text.length(), *text->path, text->hOffset,
							text->vOffset, paintText);
					rc->nativeOperations.start();
				} else {
					if (text->shieldRes.length() > 0) {
						SkBitmap* ico = getCachedBitmap(rc, text->shieldRes);
						if (ico != NULL) {
							rc->nativeOperations.pause();
							cv->drawBitmap(*ico, text->centerX - ico->width() / 2 - 0.5f,
									text->centerY - ico->height() / 2 - getDensityValue(rc, 4.5f), &paintIcon);
							rc->nativeOperations.start();
						}
					}
					drawWrappedText(rc, cv, text, textSize, paintText);
				}
			}
		}
	}
}