本文深入探讨了SkCanvas类中用于绘制文本的方法drawText的实现细节，包括参数解释、内部逻辑以及绘制流程。
void SkCanvas::drawText(const void* text, size_t byteLength,
1883 SkScalar x, SkScalar y, const SkPaint& paint) {
1884 CHECK_SHADER_NOSETCONTEXT(paint);
1885
1886 LOOPER_BEGIN(paint, SkDrawFilter::kText_Type)
1887
1888 while (iter.next()) {
1889 SkDeviceFilteredPaint dfp(iter.fDevice, looper.paint());
1890 iter.fDevice->drawText(iter, text, byteLength, x, y, dfp.paint());
1891 DrawTextDecorations(iter, dfp.paint(),
1892 static_cast<const char*>(text), byteLength, x, y);
1893 }
1894
1895 LOOPER_END
1883 SkScalar x, SkScalar y, const SkPaint& paint) {
1884 CHECK_SHADER_NOSETCONTEXT(paint);
1885
1886 LOOPER_BEGIN(paint, SkDrawFilter::kText_Type)
1887
1888 while (iter.next()) {
1889 SkDeviceFilteredPaint dfp(iter.fDevice, looper.paint());
1890 iter.fDevice->drawText(iter, text, byteLength, x, y, dfp.paint());
1891 DrawTextDecorations(iter, dfp.paint(),
1892 static_cast<const char*>(text), byteLength, x, y);
1893 }
1894
1895 LOOPER_END
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