LCOV - code coverage report
Current view: directory - gfx/thebes - gfxRect.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 30 0 0.0 %
Date: 2012-06-02 Functions: 3 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
       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 Novell code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is Novell Corporation.
      18                 :  * Portions created by the Initial Developer are Copyright (C) 2006
      19                 :  * the Initial Developer. All Rights Reserved.
      20                 :  *
      21                 :  * Contributor(s):
      22                 :  *   Robert O'Callahan (rocallahan@novell.com)
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      26                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : #include "gfxRect.h"
      39                 : 
      40                 : #include "nsMathUtils.h"
      41                 : 
      42                 : static bool
      43               0 : WithinEpsilonOfInteger(gfxFloat aX, gfxFloat aEpsilon)
      44                 : {
      45               0 :     return fabs(NS_round(aX) - aX) <= fabs(aEpsilon);
      46                 : }
      47                 : 
      48                 : bool
      49               0 : gfxRect::WithinEpsilonOfIntegerPixels(gfxFloat aEpsilon) const
      50                 : {
      51               0 :     NS_ASSERTION(-0.5 < aEpsilon && aEpsilon < 0.5, "Nonsense epsilon value");
      52               0 :     return (WithinEpsilonOfInteger(x, aEpsilon) &&
      53               0 :             WithinEpsilonOfInteger(y, aEpsilon) &&
      54               0 :             WithinEpsilonOfInteger(width, aEpsilon) &&
      55               0 :             WithinEpsilonOfInteger(height, aEpsilon));
      56                 : }
      57                 : 
      58                 : /* Clamp r to CAIRO_COORD_MIN .. CAIRO_COORD_MAX
      59                 :  * these are to be device coordinates.
      60                 :  *
      61                 :  * Cairo is currently using 24.8 fixed point,
      62                 :  * so -2^24 .. 2^24-1 is our valid
      63                 :  */
      64                 : 
      65                 : #define CAIRO_COORD_MAX (16777215.0)
      66                 : #define CAIRO_COORD_MIN (-16777216.0)
      67                 : 
      68                 : void
      69               0 : gfxRect::Condition()
      70                 : {
      71                 :     // if either x or y is way out of bounds;
      72                 :     // note that we don't handle negative w/h here
      73               0 :     if (x > CAIRO_COORD_MAX) {
      74               0 :         x = CAIRO_COORD_MAX;
      75               0 :         width = 0.0;
      76                 :     } 
      77                 : 
      78               0 :     if (y > CAIRO_COORD_MAX) {
      79               0 :         y = CAIRO_COORD_MAX;
      80               0 :         height = 0.0;
      81                 :     }
      82                 : 
      83               0 :     if (x < CAIRO_COORD_MIN) {
      84               0 :         width += x - CAIRO_COORD_MIN;
      85               0 :         if (width < 0.0)
      86               0 :             width = 0.0;
      87               0 :         x = CAIRO_COORD_MIN;
      88                 :     }
      89                 : 
      90               0 :     if (y < CAIRO_COORD_MIN) {
      91               0 :         height += y - CAIRO_COORD_MIN;
      92               0 :         if (height < 0.0)
      93               0 :             height = 0.0;
      94               0 :         y = CAIRO_COORD_MIN;
      95                 :     }
      96                 : 
      97               0 :     if (x + width > CAIRO_COORD_MAX) {
      98               0 :         width = CAIRO_COORD_MAX - x;
      99                 :     }
     100                 : 
     101               0 :     if (y + height > CAIRO_COORD_MAX) {
     102               0 :         height = CAIRO_COORD_MAX - y;
     103                 :     }
     104               0 : }

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