Line data    Source code

       1           0 : /*
       2             : 
       3             : OONullTexture.m
       4             : 
       5             : 
       6             : Copyright (C) 2008-2013 Jens Ayton
       7             : 
       8             : Permission is hereby granted, free of charge, to any person obtaining a copy
       9             : of this software and associated documentation files (the "Software"), to deal
      10             : in the Software without restriction, including without limitation the rights
      11             : to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
      12             : copies of the Software, and to permit persons to whom the Software is
      13             : furnished to do so, subject to the following conditions:
      14             : 
      15             : The above copyright notice and this permission notice shall be included in all
      16             : copies or substantial portions of the Software.
      17             : 
      18             : THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
      19             : IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      20             : FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
      21             : AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      22             : LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
      23             : OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
      24             : SOFTWARE.
      25             : 
      26             : */
      27             : 
      28             : #import "OONullTexture.h"
      29             : #import "OOCocoa.h"
      30             : #import "OOTextureInternal.h"
      31             : 
      32             : 
      33           0 : static OONullTexture *sSingleton = nil;
      34             : 
      35             : 
      36             : @implementation OONullTexture
      37             : 
      38             : + (OONullTexture *) sharedNullTexture
      39             : {
      40             :         // NOTE: assumes single-threaded access.
      41             :         if (sSingleton == nil)
      42             :         {
      43             :                 sSingleton = [[self alloc] init];
      44             :         }
      45             :         
      46             :         return sSingleton;
      47             : }
      48             : 
      49             : 
      50           0 : - (void) apply
      51             : {
      52             :         [OOTexture applyNone];
      53             : }
      54             : 
      55             : 
      56           0 : - (NSSize) dimensions
      57             : {
      58             :         return NSZeroSize;
      59             : }
      60             : 
      61             : 
      62           0 : - (BOOL) isMipMapped
      63             : {
      64             :         return NO;
      65             : }
      66             : 
      67             : 
      68           0 : - (void) forceRebind
      69             : {
      70             :         
      71             : }
      72             : 
      73             : 
      74             : #ifndef NDEBUG
      75           0 : - (NSString *) name
      76             : {
      77             :         return @"<null texture>";
      78             : }
      79             : #endif
      80             : 
      81             : @end
      82             : 
      83             : 
      84             : @implementation OONullTexture (Singleton)
      85             : 
      86             : /*      Canonical singleton boilerplate.
      87             :         See Cocoa Fundamentals Guide: Creating a Singleton Instance.
      88             :         See also +nullTexture above.
      89             :         
      90             :         NOTE: assumes single-threaded access.
      91             : */
      92             : 
      93           0 : + (id)allocWithZone:(NSZone *)inZone
      94             : {
      95             :         if (sSingleton == nil)
      96             :         {
      97             :                 sSingleton = [super allocWithZone:inZone];
      98             :                 return sSingleton;
      99             :         }
     100             :         return nil;
     101             : }
     102             : 
     103             : 
     104           0 : - (id)copyWithZone:(NSZone *)inZone
     105             : {
     106             :         return self;
     107             : }
     108             : 
     109             : 
     110           0 : - (id)retain
     111             : {
     112             :         return self;
     113             : }
     114             : 
     115             : 
     116           0 : - (NSUInteger)retainCount
     117             : {
     118             :         return UINT_MAX;
     119             : }
     120             : 
     121             : 
     122           0 : - (void)release
     123             : {}
     124             : 
     125             : 
     126           0 : - (id)autorelease
     127             : {
     128             :         return self;
     129             : }
     130             : 
     131             : @end