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+/*
+ * cocos2d for iPhone: http://www.cocos2d-iphone.org
+ *
+ * Copyright (c) 2008-2010 Ricardo Quesada
+ * Copyright (c) 2011 Zynga Inc.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+
+#import "ccConfig.h"
+#import "ccMacros.h"
+#import "CCDrawingPrimitives.h"
+#import "CCLabelAtlas.h"
+#import "Support/CGPointExtension.h"
+
+
+
+@implementation CCLabelAtlas
+
+#pragma mark CCLabelAtlas - Creation & Init
++(id) labelWithString:(NSString*)string charMapFile:(NSString*)charmapfile itemWidth:(NSUInteger)w itemHeight:(NSUInteger)h startCharMap:(unsigned char)c
+{
+        return [[[self alloc] initWithString:string charMapFile:charmapfile itemWidth:w itemHeight:h startCharMap:c] autorelease];
+}
+
+// XXX DEPRECATED. Remove it in 1.0.1
++(id) labelAtlasWithString:(NSString*) string charMapFile: (NSString*) charmapfile itemWidth:(NSUInteger)w itemHeight:(NSUInteger)h startCharMap:(unsigned char)c
+{
+        return [self labelWithString:string charMapFile:charmapfile itemWidth:w itemHeight:h startCharMap:c];
+}
+
+
+-(id) initWithString:(NSString*) theString charMapFile: (NSString*) charmapfile itemWidth:(NSUInteger)w itemHeight:(NSUInteger)h startCharMap:(unsigned char)c
+{
+
+        if ((self=[super initWithTileFile:charmapfile tileWidth:w tileHeight:h itemsToRender:[theString length] ]) ) {
+
+                mapStartChar_ = c;              
+                [self setString: theString];
+        }
+
+        return self;
+}
+
+-(void) dealloc
+{
+        [string_ release];
+
+        [super dealloc];
+}
+
+#pragma mark CCLabelAtlas - Atlas generation
+
+-(void) updateAtlasValues
+{
+        NSUInteger n = [string_ length];
+        
+        ccV3F_C4B_T2F_Quad quad;
+
+        const unsigned char *s = (unsigned char*) [string_ UTF8String];
+
+        CCTexture2D *texture = [textureAtlas_ texture];
+        float textureWide = [texture pixelsWide];
+        float textureHigh = [texture pixelsHigh];
+
+        for( NSUInteger i=0; i<n; i++) {
+                unsigned char a = s[i] - mapStartChar_;
+                float row = (a % itemsPerRow_);
+                float col = (a / itemsPerRow_);
+                
+#if CC_FIX_ARTIFACTS_BY_STRECHING_TEXEL
+                // Issue #938. Don't use texStepX & texStepY
+                float left              = (2*row*itemWidth_+1)/(2*textureWide);
+                float right             = left+(itemWidth_*2-2)/(2*textureWide);
+                float top               = (2*col*itemHeight_+1)/(2*textureHigh);
+                float bottom    = top+(itemHeight_*2-2)/(2*textureHigh);
+#else
+                float left              = row*itemWidth_/textureWide;
+                float right             = left+itemWidth_/textureWide;
+                float top               = col*itemHeight_/textureHigh;
+                float bottom    = top+itemHeight_/textureHigh;
+#endif // ! CC_FIX_ARTIFACTS_BY_STRECHING_TEXEL
+                
+                quad.tl.texCoords.u = left;
+                quad.tl.texCoords.v = top;
+                quad.tr.texCoords.u = right;
+                quad.tr.texCoords.v = top;
+                quad.bl.texCoords.u = left;
+                quad.bl.texCoords.v = bottom;
+                quad.br.texCoords.u = right;
+                quad.br.texCoords.v = bottom;
+                
+                quad.bl.vertices.x = (int) (i * itemWidth_);
+                quad.bl.vertices.y = 0;
+                quad.bl.vertices.z = 0.0f;
+                quad.br.vertices.x = (int)(i * itemWidth_ + itemWidth_);
+                quad.br.vertices.y = 0;
+                quad.br.vertices.z = 0.0f;
+                quad.tl.vertices.x = (int)(i * itemWidth_);
+                quad.tl.vertices.y = (int)(itemHeight_);
+                quad.tl.vertices.z = 0.0f;
+                quad.tr.vertices.x = (int)(i * itemWidth_ + itemWidth_);
+                quad.tr.vertices.y = (int)(itemHeight_);
+                quad.tr.vertices.z = 0.0f;
+                
+                [textureAtlas_ updateQuad:&quad atIndex:i];
+        }
+}
+
+#pragma mark CCLabelAtlas - CCLabelProtocol
+
+- (void) setString:(NSString*) newString
+{
+        NSUInteger len = [newString length];
+        if( len > textureAtlas_.capacity )
+                [textureAtlas_ resizeCapacity:len];
+
+        [string_ release];
+        string_ = [newString copy];
+        [self updateAtlasValues];
+
+        CGSize s;
+        s.width = len * itemWidth_;
+        s.height = itemHeight_;
+        [self setContentSizeInPixels:s];
+        
+        self.quadsToDraw = len;
+}
+
+-(NSString*) string
+{
+        return string_;
+}
+
+#pragma mark CCLabelAtlas - DebugDraw
+
+#if CC_LABELATLAS_DEBUG_DRAW
+- (void) draw
+{
+        [super draw];
+
+        CGSize s = [self contentSize];
+        CGPoint vertices[4]={
+                ccp(0,0),ccp(s.width,0),
+                ccp(s.width,s.height),ccp(0,s.height),
+        };
+        ccDrawPoly(vertices, 4, YES);
+
+}
+#endif // CC_LABELATLAS_DEBUG_DRAW
+
+@end