1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/style/nsStyleTransformMatrix.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,71 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/*
1.10 + * A class representing three matrices that can be used for style transforms.
1.11 + */
1.12 +
1.13 +#ifndef nsStyleTransformMatrix_h_
1.14 +#define nsStyleTransformMatrix_h_
1.15 +
1.16 +#include "nsCSSValue.h"
1.17 +#include "gfx3DMatrix.h"
1.18 +
1.19 +class nsStyleContext;
1.20 +class nsPresContext;
1.21 +struct nsRect;
1.22 +
1.23 +/**
1.24 + * A helper to generate gfxMatrixes from css transform functions.
1.25 + */
1.26 +namespace nsStyleTransformMatrix {
1.27 +
1.28 + /**
1.29 + * Return the transform function, as an nsCSSKeyword, for the given
1.30 + * nsCSSValue::Array from a transform list.
1.31 + */
1.32 + nsCSSKeyword TransformFunctionOf(const nsCSSValue::Array* aData);
1.33 +
1.34 + float ProcessTranslatePart(const nsCSSValue& aValue,
1.35 + nsStyleContext* aContext,
1.36 + nsPresContext* aPresContext,
1.37 + bool& aCanStoreInRuleTree,
1.38 + nscoord aSize,
1.39 + float aAppUnitsPerMatrixUnit);
1.40 +
1.41 + void
1.42 + ProcessInterpolateMatrix(gfx3DMatrix& aMatrix,
1.43 + const nsCSSValue::Array* aData,
1.44 + nsStyleContext* aContext,
1.45 + nsPresContext* aPresContext,
1.46 + bool& aCanStoreInRuleTree,
1.47 + nsRect& aBounds, float aAppUnitsPerMatrixUnit);
1.48 +
1.49 + /**
1.50 + * Given an nsCSSValueList containing -moz-transform functions,
1.51 + * returns a matrix containing the value of those functions.
1.52 + *
1.53 + * @param aData The nsCSSValueList containing the transform functions
1.54 + * @param aContext The style context, used for unit conversion.
1.55 + * @param aPresContext The presentation context, used for unit conversion.
1.56 + * @param aCanStoreInRuleTree Set to false if the result cannot be cached
1.57 + * in the rule tree, otherwise untouched.
1.58 + * @param aBounds The frame's bounding rectangle.
1.59 + * @param aAppUnitsPerMatrixUnit The number of app units per device pixel.
1.60 + *
1.61 + * aContext and aPresContext may be null if all of the (non-percent)
1.62 + * length values in aData are already known to have been converted to
1.63 + * eCSSUnit_Pixel (as they are in an nsStyleAnimation::Value)
1.64 + */
1.65 + gfx3DMatrix ReadTransforms(const nsCSSValueList* aList,
1.66 + nsStyleContext* aContext,
1.67 + nsPresContext* aPresContext,
1.68 + bool &aCanStoreInRuleTree,
1.69 + nsRect& aBounds,
1.70 + float aAppUnitsPerMatrixUnit);
1.71 +
1.72 +} // namespace nsStyleTransformMatrix
1.73 +
1.74 +#endif
