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/* -*- Mode: C++; tab-width: 2; 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/. */
/*
* A class representing three matrices that can be used for style transforms.
*/
#ifndef nsStyleTransformMatrix_h_
#define nsStyleTransformMatrix_h_
#include "nsCSSValue.h"
#include "gfxMatrix.h"
#include "gfx3DMatrix.h"
struct nsCSSValueList;
class nsStyleContext;
class nsPresContext;
struct nsRect;
/**
* A helper to generate gfxMatrixes from css transform functions.
*/
namespace nsStyleTransformMatrix {
/**
* Return the transform function, as an nsCSSKeyword, for the given
* nsCSSValue::Array from a transform list.
*/
nsCSSKeyword TransformFunctionOf(const nsCSSValue::Array* aData);
float ProcessTranslatePart(const nsCSSValue& aValue,
nsStyleContext* aContext,
nsPresContext* aPresContext,
bool& aCanStoreInRuleTree,
nscoord aSize,
float aAppUnitsPerMatrixUnit);
void
ProcessInterpolateMatrix(gfx3DMatrix& aMatrix,
const nsCSSValue::Array* aData,
nsStyleContext* aContext,
nsPresContext* aPresContext,
bool& aCanStoreInRuleTree,
nsRect& aBounds, float aAppUnitsPerMatrixUnit);
/**
* Given an nsCSSValueList containing -moz-transform functions,
* returns a matrix containing the value of those functions.
*
* @param aData The nsCSSValueList containing the transform functions
* @param aContext The style context, used for unit conversion.
* @param aPresContext The presentation context, used for unit conversion.
* @param aCanStoreInRuleTree Set to false if the result cannot be cached
* in the rule tree, otherwise untouched.
* @param aBounds The frame's bounding rectangle.
* @param aAppUnitsPerMatrixUnit The number of app units per device pixel.
*
* aContext and aPresContext may be null if all of the (non-percent)
* length values in aData are already known to have been converted to
* eCSSUnit_Pixel (as they are in an nsStyleAnimation::Value)
*/
gfx3DMatrix ReadTransforms(const nsCSSValueList* aList,
nsStyleContext* aContext,
nsPresContext* aPresContext,
bool &aCanStoreInRuleTree,
nsRect& aBounds,
float aAppUnitsPerMatrixUnit);
} // namespace nsStyleTransformMatrix
#endif
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