SVGPreserveAspectRatio.cpp [plain text]
#include "config.h"
#if ENABLE(SVG)
#include "SVGPreserveAspectRatio.h"
#include "SVGParserUtilities.h"
#include "SVGSVGElement.h"
namespace WebCore {
SVGPreserveAspectRatio::SVGPreserveAspectRatio(const SVGStyledElement* context)
: Shared<SVGPreserveAspectRatio>()
, m_align(SVG_PRESERVEASPECTRATIO_XMIDYMID)
, m_meetOrSlice(SVG_MEETORSLICE_MEET)
, m_context(context)
{
}
SVGPreserveAspectRatio::~SVGPreserveAspectRatio()
{
}
void SVGPreserveAspectRatio::setAlign(unsigned short align)
{
m_align = align;
}
unsigned short SVGPreserveAspectRatio::align() const
{
return m_align;
}
void SVGPreserveAspectRatio::setMeetOrSlice(unsigned short meetOrSlice)
{
m_meetOrSlice = meetOrSlice;
}
unsigned short SVGPreserveAspectRatio::meetOrSlice() const
{
return m_meetOrSlice;
}
void SVGPreserveAspectRatio::parsePreserveAspectRatio(const String& string)
{
SVGPreserveAspectRatioType align = SVG_PRESERVEASPECTRATIO_NONE;
SVGMeetOrSliceType meetOrSlice = SVG_MEETORSLICE_MEET;
const UChar* currParam = string.characters();
const UChar* end = currParam + string.length();
if (!skipOptionalSpaces(currParam, end))
goto bail_out;
if (*currParam == 'd') {
if (!skipString(currParam, end, "defer"))
goto bail_out;
if (!skipOptionalSpaces(currParam, end))
goto bail_out;
}
if (*currParam == 'n') {
if (!skipString(currParam, end, "none"))
goto bail_out;
skipOptionalSpaces(currParam, end);
} else if (*currParam == 'x') {
if ((end - currParam) < 8)
goto bail_out;
if (currParam[1] != 'M' || currParam[4] != 'Y' || currParam[5] != 'M')
goto bail_out;
if (currParam[2] == 'i') {
if (currParam[3] == 'n') {
if (currParam[6] == 'i') {
if (currParam[7] == 'n')
align = SVG_PRESERVEASPECTRATIO_XMINYMIN;
else if (currParam[7] == 'd')
align = SVG_PRESERVEASPECTRATIO_XMINYMID;
else
goto bail_out;
} else if (currParam[6] == 'a' && currParam[7] == 'x')
align = SVG_PRESERVEASPECTRATIO_XMINYMAX;
else
goto bail_out;
} else if (currParam[3] == 'd') {
if (currParam[6] == 'i') {
if (currParam[7] == 'n')
align = SVG_PRESERVEASPECTRATIO_XMIDYMIN;
else if (currParam[7] == 'd')
align = SVG_PRESERVEASPECTRATIO_XMIDYMID;
else
goto bail_out;
} else if (currParam[6] == 'a' && currParam[7] == 'x')
align = SVG_PRESERVEASPECTRATIO_XMIDYMAX;
else
goto bail_out;
} else
goto bail_out;
} else if (currParam[2] == 'a' && currParam[3] == 'x') {
if (currParam[6] == 'i') {
if (currParam[7] == 'n')
align = SVG_PRESERVEASPECTRATIO_XMAXYMIN;
else if (currParam[7] == 'd')
align = SVG_PRESERVEASPECTRATIO_XMAXYMID;
else
goto bail_out;
} else if (currParam[6] == 'a' && currParam[7] == 'x')
align = SVG_PRESERVEASPECTRATIO_XMAXYMAX;
else
goto bail_out;
} else
goto bail_out;
currParam += 8;
skipOptionalSpaces(currParam, end);
} else
goto bail_out;
if (currParam < end) {
if (*currParam == 'm') {
if (!skipString(currParam, end, "meet"))
goto bail_out;
skipOptionalSpaces(currParam, end);
} else if (*currParam == 's') {
if (!skipString(currParam, end, "slice"))
goto bail_out;
skipOptionalSpaces(currParam, end);
if (align != SVG_PRESERVEASPECTRATIO_NONE)
meetOrSlice = SVG_MEETORSLICE_SLICE;
}
}
if (end != currParam) {
bail_out:
align = SVG_PRESERVEASPECTRATIO_NONE;
meetOrSlice = SVG_MEETORSLICE_MEET;
}
if (m_align == align && m_meetOrSlice == meetOrSlice)
return;
m_align = align;
m_meetOrSlice = meetOrSlice;
if (m_context)
m_context->notifyAttributeChange();
}
AffineTransform SVGPreserveAspectRatio::getCTM(float logicX, float logicY,
float logicWidth, float logicHeight,
float , float ,
float physWidth, float physHeight)
{
AffineTransform temp;
if (align() == SVG_PRESERVEASPECTRATIO_UNKNOWN)
return temp;
float vpar = logicWidth / logicHeight;
float 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;
}
}
#endif // ENABLE(SVG)