LCOV - app.info - objdir/dist/include/nsTransform2D.h

LCOV - code coverage report
| Current view: | directory - objdir/dist/include - nsTransform2D.h (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 4 | 0 | 0.0 %
| Date: | 2012-04-21 | Functions: | 4 | 0 | 0.0 %

           1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
           2                 : /* ***** BEGIN LICENSE BLOCK *****
           3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
           4                 :  *
           5                 :  * The contents of this file are subject to the Mozilla Public License Version
           6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
           7                 :  * the License. You may obtain a copy of the License at
           8                 :  * http://www.mozilla.org/MPL/
           9                 :  *
          10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
          11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
          12                 :  * for the specific language governing rights and limitations under the
          13                 :  * License.
          14                 :  *
          15                 :  * The Original Code is mozilla.org code.
          16                 :  *
          17                 :  * The Initial Developer of the Original Code is
          18                 :  * Netscape Communications Corporation.
          19                 :  * Portions created by the Initial Developer are Copyright (C) 1998
          20                 :  * the Initial Developer. All Rights Reserved.
          21                 :  *
          22                 :  * Contributor(s):
          23                 :  *      michaelp   09-25-97 1:56pm
          24                 :  *
          25                 :  * Alternatively, the contents of this file may be used under the terms of
          26                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
          27                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
          28                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
          29                 :  * of those above. If you wish to allow use of your version of this file only
          30                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
          31                 :  * use your version of this file under the terms of the MPL, indicate your
          32                 :  * decision by deleting the provisions above and replace them with the notice
          33                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
          34                 :  * the provisions above, a recipient may use your version of this file under
          35                 :  * the terms of any one of the MPL, the GPL or the LGPL.
          36                 :  *
          37                 :  * ***** END LICENSE BLOCK ***** */
          38                 :
          39                 : #ifndef nsTransform2D_h___
          40                 : #define nsTransform2D_h___
          41                 :
          42                 : #include "gfxCore.h"
          43                 : #include "nsCoord.h"
          44                 :
          45                 : class NS_GFX nsTransform2D
          46                 : {
          47                 : private:
          48                 :  /**
          49                 :   * This represents the following matrix (note that the order of row/column
          50                 :   * indices is opposite to usual notation)
          51                 :   *
          52                 :   *      / m00   0   m20  \
          53                 :   * M =  |  0   m11  m21  |
          54                 :   *      \  0    0    1   /
          55                 :   *
          56                 :   * Transformation of a coordinate (x, y) is obtained by setting
          57                 :   * v = (x, y, 1)^T and evaluating  M . v
          58                 :   **/
          59                 :
          60                 :   float     m00, m11, m20, m21;
          61                 :
          62                 : public:
          63               0 :   nsTransform2D(void)                         { m20 = m21 = 0.0f; m00 = m11 = 1.0f; }
          64                 :   nsTransform2D(nsTransform2D *aTransform2D)  {
          65                 :     m00 = aTransform2D->m00;
          66                 :     m11 = aTransform2D->m11;
          67                 :     m20 = aTransform2D->m20;
          68                 :     m21 = aTransform2D->m21;
          69                 :   }
          70                 :
          71               0 :   ~nsTransform2D(void)                        { }
          72                 :
          73                 :  /**
          74                 :   * set this transform to a translation
          75                 :   *
          76                 :   * @param      tx, x translation
          77                 :   * @param      ty, y translation
          78                 :   **/
          79                 :
          80               0 :   void SetToTranslate(float tx, float ty)    { m00 = m11 = 1.0f; m20 = tx; m21 = ty; }
          81                 :
          82                 :  /**
          83                 :   * get the translation portion of this transform
          84                 :   *
          85                 :   * @param      pt, Point to return translation values in
          86                 :   **/
          87                 :
          88                 :   void GetTranslationCoord(nscoord *ptX, nscoord *ptY) const { *ptX = NSToCoordRound(m20); *ptY = NSToCoordRound(m21); }
          89                 :
          90                 :  /**
          91                 :   * apply matrix to vector
          92                 :   *
          93                 :   * @param    pt Point to transform
          94                 :   **/
          95                 :
          96                 :   void TransformCoord(nscoord *ptX, nscoord *ptY) const;
          97                 :
          98                 :  /**
          99                 :   * apply matrix to rect
         100                 :   *
         101                 :   * @param    rect Rect to transform
         102                 :   **/
         103                 :
         104                 :   void TransformCoord(nscoord *aX, nscoord *aY, nscoord *aWidth, nscoord *aHeight) const;
         105                 :
         106                 :  /**
         107                 :   * add a scale to a Transform via x, y pair
         108                 :   *
         109                 :   * @param    ptX x value to add as x scale
         110                 :   * @param    ptY y value to add as y scale
         111                 :   **/
         112                 :
         113                 :   void AddScale(float ptX, float ptY) { m00 *= ptX; m11 *= ptY; }
         114                 :
         115                 :  /**
         116                 :   * Set the scale (overriding any previous calls to AddScale, but leaving
         117                 :   * any existing translation).
         118                 :   *
         119                 :   * @param    ptX x value to add as x scale
         120                 :   * @param    ptY y value to add as y scale
         121                 :   **/
         122                 :
         123               0 :   void SetScale(float ptX, float ptY) { m00 = ptX; m11 = ptY; }
         124                 : };
         125                 :
         126                 : #endif

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