SkSVGRectPriv.h File Reference

#include <tuple>
#include "src/base/SkTLazy.h"

Go to the source code of this file.

Functions
std::tuple< float, float >	ResolveOptionalRadii (const SkTLazy< SkSVGLength > &rx, const SkTLazy< SkSVGLength > &ry, const SkSVGLengthContext &)

Function Documentation

ResolveOptionalRadii()

std::tuple< float, float > ResolveOptionalRadii	(	const SkTLazy< SkSVGLength > &	rx,
		const SkTLazy< SkSVGLength > &	ry,
		const SkSVGLengthContext &	lctx
	)

Definition at line 17 of file SkSVGRect.cpp.

                                                                              {
    // https://www.w3.org/TR/SVG2/shapes.html#RectElement
    //
    // The used values for rx and ry are determined from the computed values by following these
    // steps in order:
    //
    // 1. If both rx and ry have a computed value of auto (since auto is the initial value for both
    //    properties, this will also occur if neither are specified by the author or if all
    //    author-supplied values are invalid), then the used value of both rx and ry is 0.
    //    (This will result in square corners.)
    // 2. Otherwise, convert specified values to absolute values as follows:
    //     1. If rx is set to a length value or a percentage, but ry is auto, calculate an absolute
    //        length equivalent for rx, resolving percentages against the used width of the
    //        rectangle; the absolute value for ry is the same.
    //     2. If ry is set to a length value or a percentage, but rx is auto, calculate the absolute
    //        length equivalent for ry, resolving percentages against the used height of the
    //        rectangle; the absolute value for rx is the same.
    //     3. If both rx and ry were set to lengths or percentages, absolute values are generated
    //        individually, resolving rx percentages against the used width, and resolving ry
    //        percentages against the used height.
    const float rx = opt_rx.isValid()
        ? lctx.resolve(*opt_rx, SkSVGLengthContext::LengthType::kHorizontal)
        : 0;
    const float ry = opt_ry.isValid()
        ? lctx.resolve(*opt_ry, SkSVGLengthContext::LengthType::kVertical)
        : 0;
 
    return std::make_tuple(opt_rx.isValid() ? rx : ry,
                           opt_ry.isValid() ? ry : rx);
}