String SVGPreserveAspectRatio::valueAsString() const
{
String result;
switch ((SVGPreserveAspectRatioType) align()) {
default:
case SVG_PRESERVEASPECTRATIO_NONE:
result = "none";
break;
case SVG_PRESERVEASPECTRATIO_XMINYMIN:
result = "xMinYMin";
break;
case SVG_PRESERVEASPECTRATIO_XMIDYMIN:
result = "xMidYMin";
break;
case SVG_PRESERVEASPECTRATIO_XMAXYMIN:
result = "xMaxYMin";
break;
case SVG_PRESERVEASPECTRATIO_XMINYMID:
result = "xMinYMid";
break;
case SVG_PRESERVEASPECTRATIO_XMIDYMID:
result = "xMidYMid";
break;
case SVG_PRESERVEASPECTRATIO_XMAXYMID:
result = "xMaxYMid";
break;
case SVG_PRESERVEASPECTRATIO_XMINYMAX:
result = "xMinYMax";
break;
case SVG_PRESERVEASPECTRATIO_XMIDYMAX:
result = "xMidYMax";
break;
case SVG_PRESERVEASPECTRATIO_XMAXYMAX:
result = "xMaxYMax";
break;
};
switch ((SVGMeetOrSliceType) meetOrSlice()) {
default:
case SVG_MEETORSLICE_UNKNOWN:
break;
case SVG_MEETORSLICE_MEET:
result += " meet";
break;
case SVG_MEETORSLICE_SLICE:
result += " slice";
break;
};
return result;
}
AffineTransform SVGPreserveAspectRatio::getCTM(double logicX, double logicY,
double logicWidth, double logicHeight,
double /*physX*/, double /*physY*/,
double physWidth, double physHeight)
{
AffineTransform temp;
if (align() == SVG_PRESERVEASPECTRATIO_UNKNOWN)
return temp;
double vpar = logicWidth / logicHeight;
double svgar = physWidth / physHeight;
if (align() == SVG_PRESERVEASPECTRATIO_NONE) {
temp.scale(physWidth / logicWidth, physHeight / logicHeight);
temp.translate(-logicX, -logicY);
} else if (vpar < svgar && (meetOrSlice() == SVG_MEETORSLICE_MEET) || vpar >= svgar && (meetOrSlice() == SVG_MEETORSLICE_SLICE)) {
temp.scale(physHeight / logicHeight, physHeight / logicHeight);
if (align() == SVG_PRESERVEASPECTRATIO_XMINYMIN || align() == SVG_PRESERVEASPECTRATIO_XMINYMID || align() == SVG_PRESERVEASPECTRATIO_XMINYMAX)
temp.translate(-logicX, -logicY);
else if (align() == SVG_PRESERVEASPECTRATIO_XMIDYMIN || align() == SVG_PRESERVEASPECTRATIO_XMIDYMID || align() == SVG_PRESERVEASPECTRATIO_XMIDYMAX)
temp.translate(-logicX - (logicWidth - physWidth * logicHeight / physHeight) / 2, -logicY);
else
temp.translate(-logicX - (logicWidth - physWidth * logicHeight / physHeight), -logicY);
} else {
temp.scale(physWidth / logicWidth, physWidth / logicWidth);
if (align() == SVG_PRESERVEASPECTRATIO_XMINYMIN || align() == SVG_PRESERVEASPECTRATIO_XMIDYMIN || align() == SVG_PRESERVEASPECTRATIO_XMAXYMIN)
temp.translate(-logicX, -logicY);
else if (align() == SVG_PRESERVEASPECTRATIO_XMINYMID || align() == SVG_PRESERVEASPECTRATIO_XMIDYMID || align() == SVG_PRESERVEASPECTRATIO_XMAXYMID)
temp.translate(-logicX, -logicY - (logicHeight - physHeight * logicWidth / physWidth) / 2);
else
temp.translate(-logicX, -logicY - (logicHeight - physHeight * logicWidth / physWidth));
}
return temp;
}
void SVGPreserveAspectRatio::transformRect(FloatRect& destRect, FloatRect& srcRect)
{
FloatSize imageSize = srcRect.size();
float origDestWidth = destRect.width();
float origDestHeight = destRect.height();
if (meetOrSlice() == SVGPreserveAspectRatio::SVG_MEETORSLICE_MEET) {
float widthToHeightMultiplier = srcRect.height() / srcRect.width();
if (origDestHeight > (origDestWidth * widthToHeightMultiplier)) {
destRect.setHeight(origDestWidth * widthToHeightMultiplier);
switch (align()) {
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMID:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID:
destRect.setY(destRect.y() + origDestHeight / 2.0f - destRect.height() / 2.0f);
break;
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMAX:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX:
destRect.setY(destRect.y() + origDestHeight - destRect.height());
break;
}
}
if (origDestWidth > (origDestHeight / widthToHeightMultiplier)) {
destRect.setWidth(origDestHeight / widthToHeightMultiplier);
switch (align()) {
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMIN:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX:
destRect.setX(destRect.x() + origDestWidth / 2.0f - destRect.width() / 2.0f);
break;
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMIN:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX:
destRect.setX(destRect.x() + origDestWidth - destRect.width());
break;
}
}
} else if (meetOrSlice() == SVGPreserveAspectRatio::SVG_MEETORSLICE_SLICE) {
float widthToHeightMultiplier = srcRect.height() / srcRect.width();
// if the destination height is less than the height of the image we'll be drawing
if (origDestHeight < (origDestWidth * widthToHeightMultiplier)) {
float destToSrcMultiplier = srcRect.width() / destRect.width();
srcRect.setHeight(destRect.height() * destToSrcMultiplier);
switch (align()) {
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMID:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID:
srcRect.setY(destRect.y() + imageSize.height() / 2.0f - srcRect.height() / 2.0f);
break;
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMAX:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX:
srcRect.setY(destRect.y() + imageSize.height() - srcRect.height());
break;
}
}
// if the destination width is less than the width of the image we'll be drawing
if (origDestWidth < (origDestHeight / widthToHeightMultiplier)) {
float destToSrcMultiplier = srcRect.height() / destRect.height();
srcRect.setWidth(destRect.width() * destToSrcMultiplier);
switch (align()) {
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMIN:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX:
srcRect.setX(destRect.x() + imageSize.width() / 2.0f - srcRect.width() / 2.0f);
break;
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMIN:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID:
case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX:
srcRect.setX(destRect.x() + imageSize.width() - srcRect.width());
break;
}
}
}
}
