static JSValue toJS(ExecState* exec, JSDOMGlobalObject* globalObject, const CanvasStyle& style)
{
if (style.canvasGradient())
return toJS(exec, globalObject, style.canvasGradient());
if (style.canvasPattern())
return toJS(exec, globalObject, style.canvasPattern());
return jsStringWithCache(exec, style.color());
}
void CanvasRenderingContext2D::drawTextInternal(const String& text, float x, float y, bool fill, float /*maxWidth*/, bool /*useMaxWidth*/)
{
GraphicsContext* c = drawingContext();
if (!c)
return;
if (!state().m_invertibleCTM)
return;
const Font& font = accessFont();
// FIXME: Handle maxWidth.
// FIXME: Need to turn off font smoothing.
bool rtl = canvas()->computedStyle() ? canvas()->computedStyle()->direction() == RTL : false;
bool override = canvas()->computedStyle() ? canvas()->computedStyle()->unicodeBidi() == Override : false;
unsigned length = text.length();
const UChar* string = text.characters();
TextRun textRun(string, length, 0, 0, 0, rtl, override, false, false);
// Draw the item text at the correct point.
FloatPoint location(x, y);
switch (state().m_textBaseline) {
case TopTextBaseline:
case HangingTextBaseline:
location.setY(y + font.ascent());
break;
case BottomTextBaseline:
case IdeographicTextBaseline:
location.setY(y - font.descent());
break;
case MiddleTextBaseline:
location.setY(y - font.descent() + font.height() / 2);
break;
case AlphabeticTextBaseline:
default:
// Do nothing.
break;
}
float width = font.width(TextRun(text, false, 0, 0, rtl, override));
TextAlign align = state().m_textAlign;
if (align == StartTextAlign)
align = rtl ? RightTextAlign : LeftTextAlign;
else if (align == EndTextAlign)
align = rtl ? LeftTextAlign : RightTextAlign;
switch (align) {
case CenterTextAlign:
location.setX(location.x() - width / 2);
break;
case RightTextAlign:
location.setX(location.x() - width);
break;
default:
break;
}
// The slop built in to this mask rect matches the heuristic used in FontCGWin.cpp for GDI text.
FloatRect textRect = FloatRect(location.x() - font.height() / 2, location.y() - font.ascent() - font.lineGap(),
width + font.height(), font.lineSpacing());
if (!fill)
textRect.inflate(c->strokeThickness() / 2);
if (fill)
canvas()->willDraw(textRect);
else {
// When stroking text, pointy miters can extend outside of textRect, so we
// punt and dirty the whole canvas.
canvas()->willDraw(FloatRect(0, 0, canvas()->width(), canvas()->height()));
}
#if PLATFORM(CG)
CanvasStyle* drawStyle = fill ? state().m_fillStyle.get() : state().m_strokeStyle.get();
if (drawStyle->canvasGradient() || drawStyle->canvasPattern()) {
// FIXME: The rect is not big enough for miters on stroked text.
IntRect maskRect = enclosingIntRect(textRect);
OwnPtr<ImageBuffer> maskImage = ImageBuffer::create(maskRect.size());
GraphicsContext* maskImageContext = maskImage->context();
if (fill)
maskImageContext->setFillColor(Color::black, DeviceColorSpace);
else {
maskImageContext->setStrokeColor(Color::black, DeviceColorSpace);
maskImageContext->setStrokeThickness(c->strokeThickness());
}
maskImageContext->setTextDrawingMode(fill ? cTextFill : cTextStroke);
maskImageContext->translate(-maskRect.x(), -maskRect.y());
maskImageContext->drawBidiText(font, textRun, location);
c->save();
c->clipToImageBuffer(maskRect, maskImage.get());
drawStyle->applyFillColor(c);
c->fillRect(maskRect);
c->restore();
return;
}
#endif
c->setTextDrawingMode(fill ? cTextFill : cTextStroke);
c->drawBidiText(font, textRun, location);
}