michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /*
michael@0:  * A class representing three matrices that can be used for style transforms.
michael@0:  */
michael@0: 
michael@0: #ifndef nsStyleTransformMatrix_h_
michael@0: #define nsStyleTransformMatrix_h_
michael@0: 
michael@0: #include "nsCSSValue.h"
michael@0: #include "gfx3DMatrix.h"
michael@0: 
michael@0: class nsStyleContext;
michael@0: class nsPresContext;
michael@0: struct nsRect;
michael@0: 
michael@0: /**
michael@0:  * A helper to generate gfxMatrixes from css transform functions.
michael@0:  */
michael@0: namespace nsStyleTransformMatrix {
michael@0:   
michael@0:   /**
michael@0:    * Return the transform function, as an nsCSSKeyword, for the given
michael@0:    * nsCSSValue::Array from a transform list.
michael@0:    */
michael@0:   nsCSSKeyword TransformFunctionOf(const nsCSSValue::Array* aData);
michael@0: 
michael@0:   float ProcessTranslatePart(const nsCSSValue& aValue,
michael@0:                              nsStyleContext* aContext,
michael@0:                              nsPresContext* aPresContext,
michael@0:                              bool& aCanStoreInRuleTree,
michael@0:                              nscoord aSize,
michael@0:                              float aAppUnitsPerMatrixUnit);
michael@0: 
michael@0:   void
michael@0:   ProcessInterpolateMatrix(gfx3DMatrix& aMatrix,
michael@0:                             const nsCSSValue::Array* aData,
michael@0:                             nsStyleContext* aContext,
michael@0:                             nsPresContext* aPresContext,
michael@0:                             bool& aCanStoreInRuleTree,
michael@0:                             nsRect& aBounds, float aAppUnitsPerMatrixUnit);
michael@0: 
michael@0:   /**
michael@0:    * Given an nsCSSValueList containing -moz-transform functions,
michael@0:    * returns a matrix containing the value of those functions.
michael@0:    *
michael@0:    * @param aData The nsCSSValueList containing the transform functions
michael@0:    * @param aContext The style context, used for unit conversion.
michael@0:    * @param aPresContext The presentation context, used for unit conversion.
michael@0:    * @param aCanStoreInRuleTree Set to false if the result cannot be cached
michael@0:    *                            in the rule tree, otherwise untouched.
michael@0:    * @param aBounds The frame's bounding rectangle.
michael@0:    * @param aAppUnitsPerMatrixUnit The number of app units per device pixel.
michael@0:    *
michael@0:    * aContext and aPresContext may be null if all of the (non-percent)
michael@0:    * length values in aData are already known to have been converted to
michael@0:    * eCSSUnit_Pixel (as they are in an nsStyleAnimation::Value)
michael@0:    */
michael@0:   gfx3DMatrix ReadTransforms(const nsCSSValueList* aList,
michael@0:                              nsStyleContext* aContext,
michael@0:                              nsPresContext* aPresContext,
michael@0:                              bool &aCanStoreInRuleTree,
michael@0:                              nsRect& aBounds,
michael@0:                              float aAppUnitsPerMatrixUnit);
michael@0: 
michael@0: } // namespace nsStyleTransformMatrix
michael@0: 
michael@0: #endif