245 lines
6.5 KiB
C++
245 lines
6.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsError.h"
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#include "nsSVGTransform.h"
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#include "nsContentUtils.h" // for NS_ENSURE_FINITE
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#include "nsTextFormatter.h"
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namespace {
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const double kRadPerDegree = 2.0 * M_PI / 360.0;
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} // namespace
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namespace mozilla {
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void
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nsSVGTransform::GetValueAsString(nsAString& aValue) const
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{
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char16_t buf[256];
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switch (mType) {
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case SVG_TRANSFORM_TRANSLATE:
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// The spec say that if Y is not provided, it is assumed to be zero.
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if (mMatrix._32 != 0)
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nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
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MOZ_UTF16("translate(%g, %g)"),
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mMatrix._31, mMatrix._32);
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else
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nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
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MOZ_UTF16("translate(%g)"),
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mMatrix._31);
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break;
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case SVG_TRANSFORM_ROTATE:
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if (mOriginX != 0.0f || mOriginY != 0.0f)
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nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
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MOZ_UTF16("rotate(%g, %g, %g)"),
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mAngle, mOriginX, mOriginY);
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else
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nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
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MOZ_UTF16("rotate(%g)"), mAngle);
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break;
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case SVG_TRANSFORM_SCALE:
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if (mMatrix._11 != mMatrix._22)
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nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
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MOZ_UTF16("scale(%g, %g)"), mMatrix._11, mMatrix._22);
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else
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nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
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MOZ_UTF16("scale(%g)"), mMatrix._11);
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break;
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case SVG_TRANSFORM_SKEWX:
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nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
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MOZ_UTF16("skewX(%g)"), mAngle);
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break;
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case SVG_TRANSFORM_SKEWY:
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nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
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MOZ_UTF16("skewY(%g)"), mAngle);
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break;
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case SVG_TRANSFORM_MATRIX:
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nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
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MOZ_UTF16("matrix(%g, %g, %g, %g, %g, %g)"),
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mMatrix._11, mMatrix._12,
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mMatrix._21, mMatrix._22,
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mMatrix._31, mMatrix._32);
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break;
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default:
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buf[0] = '\0';
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NS_ERROR("unknown transformation type");
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break;
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}
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aValue.Assign(buf);
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}
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void
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nsSVGTransform::SetMatrix(const gfxMatrix& aMatrix)
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{
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mType = SVG_TRANSFORM_MATRIX;
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mMatrix = aMatrix;
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// We set the other members here too, since operator== requires it and
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// the DOM requires it for mAngle.
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mAngle = 0.f;
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mOriginX = 0.f;
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mOriginY = 0.f;
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}
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void
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nsSVGTransform::SetTranslate(float aTx, float aTy)
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{
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mType = SVG_TRANSFORM_TRANSLATE;
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mMatrix.Reset();
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mMatrix._31 = aTx;
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mMatrix._32 = aTy;
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mAngle = 0.f;
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mOriginX = 0.f;
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mOriginY = 0.f;
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}
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void
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nsSVGTransform::SetScale(float aSx, float aSy)
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{
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mType = SVG_TRANSFORM_SCALE;
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mMatrix.Reset();
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mMatrix._11 = aSx;
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mMatrix._22 = aSy;
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mAngle = 0.f;
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mOriginX = 0.f;
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mOriginY = 0.f;
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}
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void
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nsSVGTransform::SetRotate(float aAngle, float aCx, float aCy)
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{
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mType = SVG_TRANSFORM_ROTATE;
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mMatrix.Reset();
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mMatrix.Translate(aCx, aCy);
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mMatrix.Rotate(aAngle*kRadPerDegree);
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mMatrix.Translate(-aCx, -aCy);
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mAngle = aAngle;
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mOriginX = aCx;
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mOriginY = aCy;
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}
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nsresult
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nsSVGTransform::SetSkewX(float aAngle)
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{
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double ta = tan(aAngle*kRadPerDegree);
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NS_ENSURE_FINITE(ta, NS_ERROR_RANGE_ERR);
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mType = SVG_TRANSFORM_SKEWX;
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mMatrix.Reset();
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mMatrix._21 = ta;
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mAngle = aAngle;
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mOriginX = 0.f;
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mOriginY = 0.f;
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return NS_OK;
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}
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nsresult
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nsSVGTransform::SetSkewY(float aAngle)
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{
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double ta = tan(aAngle*kRadPerDegree);
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NS_ENSURE_FINITE(ta, NS_ERROR_RANGE_ERR);
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mType = SVG_TRANSFORM_SKEWY;
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mMatrix.Reset();
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mMatrix._12 = ta;
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mAngle = aAngle;
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mOriginX = 0.f;
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mOriginY = 0.f;
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return NS_OK;
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}
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SVGTransformSMILData::SVGTransformSMILData(const nsSVGTransform& aTransform)
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: mTransformType(aTransform.Type())
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{
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MOZ_ASSERT(mTransformType >= SVG_TRANSFORM_MATRIX &&
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mTransformType <= SVG_TRANSFORM_SKEWY,
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"Unexpected transform type");
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for (uint32_t i = 0; i < NUM_STORED_PARAMS; ++i) {
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mParams[i] = 0.f;
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}
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switch (mTransformType) {
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case SVG_TRANSFORM_MATRIX: {
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const gfxMatrix& mx = aTransform.GetMatrix();
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mParams[0] = static_cast<float>(mx._11);
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mParams[1] = static_cast<float>(mx._12);
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mParams[2] = static_cast<float>(mx._21);
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mParams[3] = static_cast<float>(mx._22);
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mParams[4] = static_cast<float>(mx._31);
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mParams[5] = static_cast<float>(mx._32);
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break;
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}
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case SVG_TRANSFORM_TRANSLATE: {
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const gfxMatrix& mx = aTransform.GetMatrix();
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mParams[0] = static_cast<float>(mx._31);
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mParams[1] = static_cast<float>(mx._32);
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break;
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}
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case SVG_TRANSFORM_SCALE: {
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const gfxMatrix& mx = aTransform.GetMatrix();
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mParams[0] = static_cast<float>(mx._11);
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mParams[1] = static_cast<float>(mx._22);
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break;
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}
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case SVG_TRANSFORM_ROTATE:
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mParams[0] = aTransform.Angle();
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aTransform.GetRotationOrigin(mParams[1], mParams[2]);
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break;
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case SVG_TRANSFORM_SKEWX:
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case SVG_TRANSFORM_SKEWY:
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mParams[0] = aTransform.Angle();
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break;
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default:
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NS_NOTREACHED("Unexpected transform type");
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break;
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}
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}
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nsSVGTransform
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SVGTransformSMILData::ToSVGTransform() const
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{
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nsSVGTransform result;
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switch (mTransformType) {
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case SVG_TRANSFORM_MATRIX:
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result.SetMatrix(gfxMatrix(mParams[0], mParams[1],
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mParams[2], mParams[3],
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mParams[4], mParams[5]));
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break;
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case SVG_TRANSFORM_TRANSLATE:
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result.SetTranslate(mParams[0], mParams[1]);
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break;
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case SVG_TRANSFORM_SCALE:
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result.SetScale(mParams[0], mParams[1]);
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break;
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case SVG_TRANSFORM_ROTATE:
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result.SetRotate(mParams[0], mParams[1], mParams[2]);
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break;
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case SVG_TRANSFORM_SKEWX:
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result.SetSkewX(mParams[0]);
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break;
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case SVG_TRANSFORM_SKEWY:
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result.SetSkewY(mParams[0]);
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break;
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default:
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NS_NOTREACHED("Unexpected transform type");
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break;
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}
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return result;
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}
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} // namespace mozilla
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