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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsError.h"
#include "nsSVGTransform.h"
#include "nsContentUtils.h" // for NS_ENSURE_FINITE
#include "nsTextFormatter.h"
namespace {
const double kRadPerDegree = 2.0 * M_PI / 360.0;
} // namespace
namespace mozilla {
void
nsSVGTransform::GetValueAsString(nsAString& aValue) const
{
char16_t buf[256];
switch (mType) {
case SVG_TRANSFORM_TRANSLATE:
// The spec say that if Y is not provided, it is assumed to be zero.
if (mMatrix._32 != 0)
nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
u"translate(%g, %g)",
mMatrix._31, mMatrix._32);
else
nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
u"translate(%g)",
mMatrix._31);
break;
case SVG_TRANSFORM_ROTATE:
if (mOriginX != 0.0f || mOriginY != 0.0f)
nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
u"rotate(%g, %g, %g)",
mAngle, mOriginX, mOriginY);
else
nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
u"rotate(%g)", mAngle);
break;
case SVG_TRANSFORM_SCALE:
if (mMatrix._11 != mMatrix._22)
nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
u"scale(%g, %g)", mMatrix._11, mMatrix._22);
else
nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
u"scale(%g)", mMatrix._11);
break;
case SVG_TRANSFORM_SKEWX:
nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
u"skewX(%g)", mAngle);
break;
case SVG_TRANSFORM_SKEWY:
nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
u"skewY(%g)", mAngle);
break;
case SVG_TRANSFORM_MATRIX:
nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
u"matrix(%g, %g, %g, %g, %g, %g)",
mMatrix._11, mMatrix._12,
mMatrix._21, mMatrix._22,
mMatrix._31, mMatrix._32);
break;
default:
buf[0] = '\0';
NS_ERROR("unknown transformation type");
break;
}
aValue.Assign(buf);
}
void
nsSVGTransform::SetMatrix(const gfxMatrix& aMatrix)
{
mType = SVG_TRANSFORM_MATRIX;
mMatrix = aMatrix;
// We set the other members here too, since operator== requires it and
// the DOM requires it for mAngle.
mAngle = 0.f;
mOriginX = 0.f;
mOriginY = 0.f;
}
void
nsSVGTransform::SetTranslate(float aTx, float aTy)
{
mType = SVG_TRANSFORM_TRANSLATE;
mMatrix.Reset();
mMatrix._31 = aTx;
mMatrix._32 = aTy;
mAngle = 0.f;
mOriginX = 0.f;
mOriginY = 0.f;
}
void
nsSVGTransform::SetScale(float aSx, float aSy)
{
mType = SVG_TRANSFORM_SCALE;
mMatrix.Reset();
mMatrix._11 = aSx;
mMatrix._22 = aSy;
mAngle = 0.f;
mOriginX = 0.f;
mOriginY = 0.f;
}
void
nsSVGTransform::SetRotate(float aAngle, float aCx, float aCy)
{
mType = SVG_TRANSFORM_ROTATE;
mMatrix.Reset();
mMatrix.Translate(aCx, aCy);
mMatrix.Rotate(aAngle*kRadPerDegree);
mMatrix.Translate(-aCx, -aCy);
mAngle = aAngle;
mOriginX = aCx;
mOriginY = aCy;
}
nsresult
nsSVGTransform::SetSkewX(float aAngle)
{
double ta = tan(aAngle*kRadPerDegree);
NS_ENSURE_FINITE(ta, NS_ERROR_RANGE_ERR);
mType = SVG_TRANSFORM_SKEWX;
mMatrix.Reset();
mMatrix._21 = ta;
mAngle = aAngle;
mOriginX = 0.f;
mOriginY = 0.f;
return NS_OK;
}
nsresult
nsSVGTransform::SetSkewY(float aAngle)
{
double ta = tan(aAngle*kRadPerDegree);
NS_ENSURE_FINITE(ta, NS_ERROR_RANGE_ERR);
mType = SVG_TRANSFORM_SKEWY;
mMatrix.Reset();
mMatrix._12 = ta;
mAngle = aAngle;
mOriginX = 0.f;
mOriginY = 0.f;
return NS_OK;
}
SVGTransformSMILData::SVGTransformSMILData(const nsSVGTransform& aTransform)
: mTransformType(aTransform.Type())
{
MOZ_ASSERT(mTransformType >= SVG_TRANSFORM_MATRIX &&
mTransformType <= SVG_TRANSFORM_SKEWY,
"Unexpected transform type");
for (uint32_t i = 0; i < NUM_STORED_PARAMS; ++i) {
mParams[i] = 0.f;
}
switch (mTransformType) {
case SVG_TRANSFORM_MATRIX: {
const gfxMatrix& mx = aTransform.GetMatrix();
mParams[0] = static_cast<float>(mx._11);
mParams[1] = static_cast<float>(mx._12);
mParams[2] = static_cast<float>(mx._21);
mParams[3] = static_cast<float>(mx._22);
mParams[4] = static_cast<float>(mx._31);
mParams[5] = static_cast<float>(mx._32);
break;
}
case SVG_TRANSFORM_TRANSLATE: {
const gfxMatrix& mx = aTransform.GetMatrix();
mParams[0] = static_cast<float>(mx._31);
mParams[1] = static_cast<float>(mx._32);
break;
}
case SVG_TRANSFORM_SCALE: {
const gfxMatrix& mx = aTransform.GetMatrix();
mParams[0] = static_cast<float>(mx._11);
mParams[1] = static_cast<float>(mx._22);
break;
}
case SVG_TRANSFORM_ROTATE:
mParams[0] = aTransform.Angle();
aTransform.GetRotationOrigin(mParams[1], mParams[2]);
break;
case SVG_TRANSFORM_SKEWX:
case SVG_TRANSFORM_SKEWY:
mParams[0] = aTransform.Angle();
break;
default:
NS_NOTREACHED("Unexpected transform type");
break;
}
}
nsSVGTransform
SVGTransformSMILData::ToSVGTransform() const
{
nsSVGTransform result;
switch (mTransformType) {
case SVG_TRANSFORM_MATRIX:
result.SetMatrix(gfxMatrix(mParams[0], mParams[1],
mParams[2], mParams[3],
mParams[4], mParams[5]));
break;
case SVG_TRANSFORM_TRANSLATE:
result.SetTranslate(mParams[0], mParams[1]);
break;
case SVG_TRANSFORM_SCALE:
result.SetScale(mParams[0], mParams[1]);
break;
case SVG_TRANSFORM_ROTATE:
result.SetRotate(mParams[0], mParams[1], mParams[2]);
break;
case SVG_TRANSFORM_SKEWX:
result.SetSkewX(mParams[0]);
break;
case SVG_TRANSFORM_SKEWY:
result.SetSkewY(mParams[0]);
break;
default:
NS_NOTREACHED("Unexpected transform type");
break;
}
return result;
}
} // namespace mozilla
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