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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 <Availability.h>
+
+#import "ccConfig.h"
+#import "CCSpriteBatchNode.h"
+#import "CCSprite.h"
+#import "CCSpriteFrame.h"
+#import "CCSpriteFrameCache.h"
+#import "CCAnimation.h"
+#import "CCAnimationCache.h"
+#import "CCTextureCache.h"
+#import "Support/CGPointExtension.h"
+#import "CCDrawingPrimitives.h"
+
+#pragma mark -
+#pragma mark CCSprite
+
+#if CC_SPRITEBATCHNODE_RENDER_SUBPIXEL
+#define RENDER_IN_SUBPIXEL
+#else
+#define RENDER_IN_SUBPIXEL(__A__) ( (int)(__A__))
+#endif
+
+// XXX: Optmization
+struct transformValues_ {
+        CGPoint pos;            // position x and y
+        CGPoint scale;          // scale x and y
+        float   rotation;
+        CGPoint skew;           // skew x and y
+        CGPoint ap;                     // anchor point in pixels
+        BOOL    visible;
+};
+
+@interface CCSprite (Private)
+-(void)updateTextureCoords:(CGRect)rect;
+-(void)updateBlendFunc;
+-(void) initAnimationDictionary;
+-(void) getTransformValues:(struct transformValues_*)tv;        // optimization
+@end
+
+@implementation CCSprite
+
+@synthesize dirty = dirty_;
+@synthesize quad = quad_;
+@synthesize atlasIndex = atlasIndex_;
+@synthesize textureRect = rect_;
+@synthesize textureRectRotated = rectRotated_;
+@synthesize blendFunc = blendFunc_;
+@synthesize usesBatchNode = usesBatchNode_;
+@synthesize textureAtlas = textureAtlas_;
+@synthesize batchNode = batchNode_;
+@synthesize honorParentTransform = honorParentTransform_;
+@synthesize offsetPositionInPixels = offsetPositionInPixels_;
+
+
++(id)spriteWithTexture:(CCTexture2D*)texture
+{
+        return [[[self alloc] initWithTexture:texture] autorelease];
+}
+
++(id)spriteWithTexture:(CCTexture2D*)texture rect:(CGRect)rect
+{
+        return [[[self alloc] initWithTexture:texture rect:rect] autorelease];
+}
+
++(id)spriteWithFile:(NSString*)filename
+{
+        return [[[self alloc] initWithFile:filename] autorelease];
+}
+
++(id)spriteWithFile:(NSString*)filename rect:(CGRect)rect
+{
+        return [[[self alloc] initWithFile:filename rect:rect] autorelease];
+}
+
++(id)spriteWithSpriteFrame:(CCSpriteFrame*)spriteFrame
+{
+        return [[[self alloc] initWithSpriteFrame:spriteFrame] autorelease];
+}
+
++(id)spriteWithSpriteFrameName:(NSString*)spriteFrameName
+{
+        CCSpriteFrame *frame = [[CCSpriteFrameCache sharedSpriteFrameCache] spriteFrameByName:spriteFrameName];
+        
+        NSAssert1(frame!=nil, @"Invalid spriteFrameName: %@", spriteFrameName);
+        return [self spriteWithSpriteFrame:frame];
+}
+
++(id)spriteWithCGImage:(CGImageRef)image key:(NSString*)key
+{
+        return [[[self alloc] initWithCGImage:image key:key] autorelease];
+}
+
++(id) spriteWithBatchNode:(CCSpriteBatchNode*)batchNode rect:(CGRect)rect
+{
+        return [[[self alloc] initWithBatchNode:batchNode rect:rect] autorelease];
+}
+
+-(id) init
+{
+        if( (self=[super init]) ) {
+                dirty_ = recursiveDirty_ = NO;
+                
+                // by default use "Self Render".
+                // if the sprite is added to a batchnode, then it will automatically switch to "batchnode Render"
+                [self useSelfRender];
+                
+                opacityModifyRGB_                       = YES;
+                opacity_                                        = 255;
+                color_ = colorUnmodified_       = ccWHITE;
+                
+                blendFunc_.src = CC_BLEND_SRC;
+                blendFunc_.dst = CC_BLEND_DST;
+                
+                // update texture (calls updateBlendFunc)
+                [self setTexture:nil];
+                
+                // clean the Quad
+                bzero(&quad_, sizeof(quad_));
+                
+                flipY_ = flipX_ = NO;
+                
+                // lazy alloc
+                animations_ = nil;
+                
+                // default transform anchor: center
+                anchorPoint_ =  ccp(0.5f, 0.5f);
+                
+                // zwoptex default values
+                offsetPositionInPixels_ = CGPointZero;
+                
+                honorParentTransform_ = CC_HONOR_PARENT_TRANSFORM_ALL;
+                hasChildren_ = NO;
+                
+                // Atlas: Color
+                ccColor4B tmpColor = {255,255,255,255};
+                quad_.bl.colors = tmpColor;
+                quad_.br.colors = tmpColor;
+                quad_.tl.colors = tmpColor;
+                quad_.tr.colors = tmpColor;     
+                
+                // Atlas: Vertex
+                
+                // updated in "useSelfRender"
+                
+                // Atlas: TexCoords
+                [self setTextureRectInPixels:CGRectZero rotated:NO untrimmedSize:CGSizeZero];
+                
+                // updateMethod selector
+                updateMethod = (__typeof__(updateMethod))[self methodForSelector:@selector(updateTransform)];
+        }
+        
+        return self;
+}
+
+-(id) initWithTexture:(CCTexture2D*)texture rect:(CGRect)rect
+{
+        NSAssert(texture!=nil, @"Invalid texture for sprite");
+        // IMPORTANT: [self init] and not [super init];
+        if( (self = [self init]) )
+        {
+                [self setTexture:texture];
+                [self setTextureRect:rect];
+        }
+        return self;
+}
+
+-(id) initWithTexture:(CCTexture2D*)texture
+{
+        NSAssert(texture!=nil, @"Invalid texture for sprite");
+
+        CGRect rect = CGRectZero;
+        rect.size = texture.contentSize;
+        return [self initWithTexture:texture rect:rect];
+}
+
+-(id) initWithFile:(NSString*)filename
+{
+        NSAssert(filename!=nil, @"Invalid filename for sprite");
+
+        CCTexture2D *texture = [[CCTextureCache sharedTextureCache] addImage: filename];
+        if( texture ) {
+                CGRect rect = CGRectZero;
+                rect.size = texture.contentSize;
+                return [self initWithTexture:texture rect:rect];
+        }
+
+        [self release];
+        return nil;
+}
+
+-(id) initWithFile:(NSString*)filename rect:(CGRect)rect
+{
+        NSAssert(filename!=nil, @"Invalid filename for sprite");
+
+        CCTexture2D *texture = [[CCTextureCache sharedTextureCache] addImage: filename];
+        if( texture )
+                return [self initWithTexture:texture rect:rect];
+
+        [self release];
+        return nil;
+}
+
+- (id) initWithSpriteFrame:(CCSpriteFrame*)spriteFrame
+{
+        NSAssert(spriteFrame!=nil, @"Invalid spriteFrame for sprite");
+
+        id ret = [self initWithTexture:spriteFrame.texture rect:spriteFrame.rect];
+        [self setDisplayFrame:spriteFrame];
+        return ret;
+}
+
+-(id)initWithSpriteFrameName:(NSString*)spriteFrameName
+{
+        NSAssert(spriteFrameName!=nil, @"Invalid spriteFrameName for sprite");
+
+        CCSpriteFrame *frame = [[CCSpriteFrameCache sharedSpriteFrameCache] spriteFrameByName:spriteFrameName];
+        return [self initWithSpriteFrame:frame];
+}
+
+// XXX: deprecated
+- (id) initWithCGImage: (CGImageRef)image
+{
+        NSAssert(image!=nil, @"Invalid CGImageRef for sprite");
+
+        // XXX: possible bug. See issue #349. New API should be added
+        NSString *key = [NSString stringWithFormat:@"%08X",(unsigned long)image];
+        CCTexture2D *texture = [[CCTextureCache sharedTextureCache] addCGImage:image forKey:key];
+        
+        CGRect rect = CGRectZero;
+        rect.size = texture.contentSize;
+        
+        return [self initWithTexture:texture rect:rect];
+}
+
+- (id) initWithCGImage:(CGImageRef)image key:(NSString*)key
+{
+        NSAssert(image!=nil, @"Invalid CGImageRef for sprite");
+        
+        // XXX: possible bug. See issue #349. New API should be added
+        CCTexture2D *texture = [[CCTextureCache sharedTextureCache] addCGImage:image forKey:key];
+        
+        CGRect rect = CGRectZero;
+        rect.size = texture.contentSize;
+        
+        return [self initWithTexture:texture rect:rect];
+}
+
+-(id) initWithBatchNode:(CCSpriteBatchNode*)batchNode rect:(CGRect)rect
+{
+        id ret = [self initWithTexture:batchNode.texture rect:rect];
+        [self useBatchNode:batchNode];
+        
+        return ret;
+}
+
+-(id) initWithBatchNode:(CCSpriteBatchNode*)batchNode rectInPixels:(CGRect)rect
+{
+        id ret = [self initWithTexture:batchNode.texture];
+        [self setTextureRectInPixels:rect rotated:NO untrimmedSize:rect.size];
+        [self useBatchNode:batchNode];
+        
+        return ret;
+}
+
+- (NSString*) description
+{
+        return [NSString stringWithFormat:@"<%@ = %08X | Rect = (%.2f,%.2f,%.2f,%.2f) | tag = %i | atlasIndex = %i>", [self class], self,
+                        rect_.origin.x, rect_.origin.y, rect_.size.width, rect_.size.height,
+                        tag_,
+                        atlasIndex_
+        ];
+}
+
+- (void) dealloc
+{
+        [texture_ release];
+        [animations_ release];
+        [super dealloc];
+}
+
+-(void) useSelfRender
+{
+        atlasIndex_ = CCSpriteIndexNotInitialized;
+        usesBatchNode_ = NO;
+        textureAtlas_ = nil;
+        batchNode_ = nil;
+        dirty_ = recursiveDirty_ = NO;
+        
+        float x1 = 0 + offsetPositionInPixels_.x;
+        float y1 = 0 + offsetPositionInPixels_.y;
+        float x2 = x1 + rectInPixels_.size.width;
+        float y2 = y1 + rectInPixels_.size.height;
+        quad_.bl.vertices = (ccVertex3F) { x1, y1, 0 };
+        quad_.br.vertices = (ccVertex3F) { x2, y1, 0 };
+        quad_.tl.vertices = (ccVertex3F) { x1, y2, 0 };
+        quad_.tr.vertices = (ccVertex3F) { x2, y2, 0 };         
+}
+
+-(void) useBatchNode:(CCSpriteBatchNode*)batchNode
+{
+        usesBatchNode_ = YES;
+        textureAtlas_ = [batchNode textureAtlas]; // weak ref
+        batchNode_ = batchNode; // weak ref
+}
+
+-(void) initAnimationDictionary
+{
+        animations_ = [[NSMutableDictionary alloc] initWithCapacity:2];
+}
+
+-(void)setTextureRect:(CGRect)rect
+{
+        CGRect rectInPixels = CC_RECT_POINTS_TO_PIXELS( rect );
+        [self setTextureRectInPixels:rectInPixels rotated:NO untrimmedSize:rectInPixels.size];
+}
+
+-(void)setTextureRectInPixels:(CGRect)rect rotated:(BOOL)rotated untrimmedSize:(CGSize)untrimmedSize
+{
+        rectInPixels_ = rect;
+        rect_ = CC_RECT_PIXELS_TO_POINTS( rect );
+        rectRotated_ = rotated;
+
+        [self setContentSizeInPixels:untrimmedSize];
+        [self updateTextureCoords:rectInPixels_];
+
+        CGPoint relativeOffsetInPixels = unflippedOffsetPositionFromCenter_;
+        
+        // issue #732
+        if( flipX_ )
+                relativeOffsetInPixels.x = -relativeOffsetInPixels.x;
+        if( flipY_ )
+                relativeOffsetInPixels.y = -relativeOffsetInPixels.y;
+        
+        offsetPositionInPixels_.x = relativeOffsetInPixels.x + (contentSizeInPixels_.width - rectInPixels_.size.width) / 2;
+        offsetPositionInPixels_.y = relativeOffsetInPixels.y + (contentSizeInPixels_.height - rectInPixels_.size.height) / 2;
+        
+        
+        // rendering using batch node
+        if( usesBatchNode_ ) {
+                // update dirty_, don't update recursiveDirty_
+                dirty_ = YES;
+        }
+
+        // self rendering
+        else
+        {
+                // Atlas: Vertex
+                float x1 = 0 + offsetPositionInPixels_.x;
+                float y1 = 0 + offsetPositionInPixels_.y;
+                float x2 = x1 + rectInPixels_.size.width;
+                float y2 = y1 + rectInPixels_.size.height;
+                
+                // Don't update Z.
+                quad_.bl.vertices = (ccVertex3F) { x1, y1, 0 };
+                quad_.br.vertices = (ccVertex3F) { x2, y1, 0 };
+                quad_.tl.vertices = (ccVertex3F) { x1, y2, 0 };
+                quad_.tr.vertices = (ccVertex3F) { x2, y2, 0 }; 
+        }                       
+}
+
+-(void)updateTextureCoords:(CGRect)rect
+{
+        CCTexture2D *tex        = (usesBatchNode_)?[textureAtlas_ texture]:texture_;
+        if(!tex)
+                return;
+        
+        float atlasWidth = (float)tex.pixelsWide;
+        float atlasHeight = (float)tex.pixelsHigh;
+        
+        float left,right,top,bottom;
+        
+        if(rectRotated_){
+#if CC_FIX_ARTIFACTS_BY_STRECHING_TEXEL
+                left    = (2*rect.origin.x+1)/(2*atlasWidth);
+                right   = left+(rect.size.height*2-2)/(2*atlasWidth);
+                top             = (2*rect.origin.y+1)/(2*atlasHeight);
+                bottom  = top+(rect.size.width*2-2)/(2*atlasHeight);
+#else
+                left    = rect.origin.x/atlasWidth;
+                right   = left+(rect.size.height/atlasWidth);
+                top             = rect.origin.y/atlasHeight;
+                bottom  = top+(rect.size.width/atlasHeight);
+#endif // ! CC_FIX_ARTIFACTS_BY_STRECHING_TEXEL
+                
+                if( flipX_)
+                        CC_SWAP(top,bottom);
+                if( flipY_)
+                        CC_SWAP(left,right);
+                
+                quad_.bl.texCoords.u = left;
+                quad_.bl.texCoords.v = top;
+                quad_.br.texCoords.u = left;
+                quad_.br.texCoords.v = bottom;
+                quad_.tl.texCoords.u = right;
+                quad_.tl.texCoords.v = top;
+                quad_.tr.texCoords.u = right;
+                quad_.tr.texCoords.v = bottom;
+        } else {
+#if CC_FIX_ARTIFACTS_BY_STRECHING_TEXEL
+                left    = (2*rect.origin.x+1)/(2*atlasWidth);
+                right   = left + (rect.size.width*2-2)/(2*atlasWidth);
+                top             = (2*rect.origin.y+1)/(2*atlasHeight);
+                bottom  = top + (rect.size.height*2-2)/(2*atlasHeight);
+#else
+                left    = rect.origin.x/atlasWidth;
+                right   = left + rect.size.width/atlasWidth;
+                top             = rect.origin.y/atlasHeight;
+                bottom  = top + rect.size.height/atlasHeight;
+#endif // ! CC_FIX_ARTIFACTS_BY_STRECHING_TEXEL
+                
+                if( flipX_)
+                        CC_SWAP(left,right);
+                if( flipY_)
+                        CC_SWAP(top,bottom);
+                
+                quad_.bl.texCoords.u = left;
+                quad_.bl.texCoords.v = bottom;
+                quad_.br.texCoords.u = right;
+                quad_.br.texCoords.v = bottom;
+                quad_.tl.texCoords.u = left;
+                quad_.tl.texCoords.v = top;
+                quad_.tr.texCoords.u = right;
+                quad_.tr.texCoords.v = top;
+        }
+}
+
+-(void)updateTransform
+{
+        NSAssert( usesBatchNode_, @"updateTransform is only valid when CCSprite is being renderd using an CCSpriteBatchNode");
+
+        // optimization. Quick return if not dirty
+        if( ! dirty_ )
+                return;
+        
+        CGAffineTransform matrix;
+        
+        // Optimization: if it is not visible, then do nothing
+        if( ! visible_ ) {
+                quad_.br.vertices = quad_.tl.vertices = quad_.tr.vertices = quad_.bl.vertices = (ccVertex3F){0,0,0};
+                [textureAtlas_ updateQuad:&quad_ atIndex:atlasIndex_];
+                dirty_ = recursiveDirty_ = NO;
+                return ;
+        }
+        
+
+        // Optimization: If parent is batchnode, or parent is nil
+        // build Affine transform manually
+        if( ! parent_ || parent_ == batchNode_ ) {
+                
+                float radians = -CC_DEGREES_TO_RADIANS(rotation_);
+                float c = cosf(radians);
+                float s = sinf(radians);
+
+                matrix = CGAffineTransformMake( c * scaleX_,  s * scaleX_,
+                                                                           -s * scaleY_, c * scaleY_,
+                                                                           positionInPixels_.x, positionInPixels_.y);
+                if( skewX_ || skewY_ ) {
+                        CGAffineTransform skewMatrix = CGAffineTransformMake(1.0f, tanf(CC_DEGREES_TO_RADIANS(skewY_)),
+                                                                                                                                 tanf(CC_DEGREES_TO_RADIANS(skewX_)), 1.0f,
+                                                                                                                                 0.0f, 0.0f);
+                        matrix = CGAffineTransformConcat(skewMatrix, matrix);
+                }
+                matrix = CGAffineTransformTranslate(matrix, -anchorPointInPixels_.x, -anchorPointInPixels_.y);          
+
+                
+        }  else {       // parent_ != batchNode_ 
+
+                // else do affine transformation according to the HonorParentTransform
+
+                matrix = CGAffineTransformIdentity;
+                ccHonorParentTransform prevHonor = CC_HONOR_PARENT_TRANSFORM_ALL;
+                
+                for (CCNode *p = self ; p && p != batchNode_ ; p = p.parent) {
+                        
+                        // Might happen. Issue #1053
+                        NSAssert( [p isKindOfClass:[CCSprite class]], @"CCSprite should be a CCSprite subclass. Probably you initialized an sprite with a batchnode, but you didn't add it to the batch node." );
+
+                        struct transformValues_ tv;
+                        [(CCSprite*)p getTransformValues: &tv];
+                        
+                        // If any of the parents are not visible, then don't draw this node
+                        if( ! tv.visible ) {
+                                quad_.br.vertices = quad_.tl.vertices = quad_.tr.vertices = quad_.bl.vertices = (ccVertex3F){0,0,0};
+                                [textureAtlas_ updateQuad:&quad_ atIndex:atlasIndex_];
+                                dirty_ = recursiveDirty_ = NO;
+                                return;
+                        }
+                        CGAffineTransform newMatrix = CGAffineTransformIdentity;
+                        
+                        // 2nd: Translate, Skew, Rotate, Scale
+                        if( prevHonor & CC_HONOR_PARENT_TRANSFORM_TRANSLATE )
+                                newMatrix = CGAffineTransformTranslate(newMatrix, tv.pos.x, tv.pos.y);
+                        if( prevHonor & CC_HONOR_PARENT_TRANSFORM_ROTATE )
+                                newMatrix = CGAffineTransformRotate(newMatrix, -CC_DEGREES_TO_RADIANS(tv.rotation));
+                        if ( prevHonor & CC_HONOR_PARENT_TRANSFORM_SKEW ) {
+                                CGAffineTransform skew = CGAffineTransformMake(1.0f, tanf(CC_DEGREES_TO_RADIANS(tv.skew.y)), tanf(CC_DEGREES_TO_RADIANS(tv.skew.x)), 1.0f, 0.0f, 0.0f);
+                                // apply the skew to the transform
+                                newMatrix = CGAffineTransformConcat(skew, newMatrix);
+                        }
+                        if( prevHonor & CC_HONOR_PARENT_TRANSFORM_SCALE ) {
+                                newMatrix = CGAffineTransformScale(newMatrix, tv.scale.x, tv.scale.y);
+                        }
+                        
+                        // 3rd: Translate anchor point
+                        newMatrix = CGAffineTransformTranslate(newMatrix, -tv.ap.x, -tv.ap.y);
+
+                        // 4th: Matrix multiplication
+                        matrix = CGAffineTransformConcat( matrix, newMatrix);
+                        
+                        prevHonor = [(CCSprite*)p honorParentTransform];
+                }               
+        }
+        
+        
+        //
+        // calculate the Quad based on the Affine Matrix
+        //      
+
+        CGSize size = rectInPixels_.size;
+
+        float x1 = offsetPositionInPixels_.x;
+        float y1 = offsetPositionInPixels_.y;
+        
+        float x2 = x1 + size.width;
+        float y2 = y1 + size.height;
+        float x = matrix.tx;
+        float y = matrix.ty;
+        
+        float cr = matrix.a;
+        float sr = matrix.b;
+        float cr2 = matrix.d;
+        float sr2 = -matrix.c;
+        float ax = x1 * cr - y1 * sr2 + x;
+        float ay = x1 * sr + y1 * cr2 + y;
+        
+        float bx = x2 * cr - y1 * sr2 + x;
+        float by = x2 * sr + y1 * cr2 + y;
+        
+        float cx = x2 * cr - y2 * sr2 + x;
+        float cy = x2 * sr + y2 * cr2 + y;
+        
+        float dx = x1 * cr - y2 * sr2 + x;
+        float dy = x1 * sr + y2 * cr2 + y;
+        
+        quad_.bl.vertices = (ccVertex3F) { RENDER_IN_SUBPIXEL(ax), RENDER_IN_SUBPIXEL(ay), vertexZ_ };
+        quad_.br.vertices = (ccVertex3F) { RENDER_IN_SUBPIXEL(bx), RENDER_IN_SUBPIXEL(by), vertexZ_ };
+        quad_.tl.vertices = (ccVertex3F) { RENDER_IN_SUBPIXEL(dx), RENDER_IN_SUBPIXEL(dy), vertexZ_ };
+        quad_.tr.vertices = (ccVertex3F) { RENDER_IN_SUBPIXEL(cx), RENDER_IN_SUBPIXEL(cy), vertexZ_ };
+                
+        [textureAtlas_ updateQuad:&quad_ atIndex:atlasIndex_];
+        dirty_ = recursiveDirty_ = NO;
+}
+
+// XXX: Optimization: instead of calling 5 times the parent sprite to obtain: position, scale.x, scale.y, anchorpoint and rotation,
+// this fuction return the 5 values in 1 single call
+-(void) getTransformValues:(struct transformValues_*) tv
+{
+        tv->pos                 = positionInPixels_;
+        tv->scale.x             = scaleX_;
+        tv->scale.y             = scaleY_;
+        tv->rotation    = rotation_;
+        tv->skew.x              = skewX_;
+        tv->skew.y              = skewY_;
+        tv->ap                  = anchorPointInPixels_;
+        tv->visible             = visible_;
+}
+
+#pragma mark CCSprite - draw
+
+-(void) draw
+{
+        [super draw];
+
+        NSAssert(!usesBatchNode_, @"If CCSprite is being rendered by CCSpriteBatchNode, CCSprite#draw SHOULD NOT be called");
+
+        // Default GL states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_COLOR_ARRAY, GL_TEXTURE_COORD_ARRAY
+        // Needed states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_COLOR_ARRAY, GL_TEXTURE_COORD_ARRAY
+        // Unneeded states: -
+
+        BOOL newBlend = blendFunc_.src != CC_BLEND_SRC || blendFunc_.dst != CC_BLEND_DST;
+        if( newBlend )
+                glBlendFunc( blendFunc_.src, blendFunc_.dst );
+
+#define kQuadSize sizeof(quad_.bl)
+        glBindTexture(GL_TEXTURE_2D, [texture_ name]);
+        
+        long offset = (long)&quad_;
+        
+        // vertex
+        NSInteger diff = offsetof( ccV3F_C4B_T2F, vertices);
+        glVertexPointer(3, GL_FLOAT, kQuadSize, (void*) (offset + diff) );
+        
+        // color
+        diff = offsetof( ccV3F_C4B_T2F, colors);
+        glColorPointer(4, GL_UNSIGNED_BYTE, kQuadSize, (void*)(offset + diff));
+        
+        // tex coords
+        diff = offsetof( ccV3F_C4B_T2F, texCoords);
+        glTexCoordPointer(2, GL_FLOAT, kQuadSize, (void*)(offset + diff));
+        
+        glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+        
+        if( newBlend )
+                glBlendFunc(CC_BLEND_SRC, CC_BLEND_DST);
+        
+#if CC_SPRITE_DEBUG_DRAW == 1
+        // draw bounding box
+        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);
+#elif CC_SPRITE_DEBUG_DRAW == 2
+        // draw texture box
+        CGSize s = self.textureRect.size;
+        CGPoint offsetPix = self.offsetPositionInPixels;
+        CGPoint vertices[4] = {
+                ccp(offsetPix.x,offsetPix.y), ccp(offsetPix.x+s.width,offsetPix.y),
+                ccp(offsetPix.x+s.width,offsetPix.y+s.height), ccp(offsetPix.x,offsetPix.y+s.height)
+        };
+        ccDrawPoly(vertices, 4, YES);
+#endif // CC_SPRITE_DEBUG_DRAW
+        
+}
+
+#pragma mark CCSprite - CCNode overrides
+
+-(void) addChild:(CCSprite*)child z:(NSInteger)z tag:(NSInteger) aTag
+{
+        NSAssert( child != nil, @"Argument must be non-nil");
+        
+        [super addChild:child z:z tag:aTag];
+        
+        if( usesBatchNode_ ) {
+                NSAssert( [child isKindOfClass:[CCSprite class]], @"CCSprite only supports CCSprites as children when using CCSpriteBatchNode");
+                NSAssert( child.texture.name == textureAtlas_.texture.name, @"CCSprite is not using the same texture id");
+                
+                NSUInteger index = [batchNode_ atlasIndexForChild:child atZ:z];
+                [batchNode_ insertChild:child inAtlasAtIndex:index];
+        }
+        
+        hasChildren_ = YES;
+}
+
+-(void) reorderChild:(CCSprite*)child z:(NSInteger)z
+{
+        NSAssert( child != nil, @"Child must be non-nil");
+        NSAssert( [children_ containsObject:child], @"Child doesn't belong to Sprite" );
+
+        if( z == child.zOrder )
+                return;
+
+        if( usesBatchNode_ ) {
+                // XXX: Instead of removing/adding, it is more efficient to reorder manually
+                [child retain];
+                [self removeChild:child cleanup:NO];
+                [self addChild:child z:z];
+                [child release];
+        }
+
+        else
+                [super reorderChild:child z:z];
+}
+
+-(void)removeChild: (CCSprite *)sprite cleanup:(BOOL)doCleanup
+{
+        if( usesBatchNode_ )
+                [batchNode_ removeSpriteFromAtlas:sprite];
+
+        [super removeChild:sprite cleanup:doCleanup];
+        
+        hasChildren_ = ( [children_ count] > 0 );
+}
+
+-(void)removeAllChildrenWithCleanup:(BOOL)doCleanup
+{
+        if( usesBatchNode_ ) {
+                CCSprite *child;
+                CCARRAY_FOREACH(children_, child)
+                        [batchNode_ removeSpriteFromAtlas:child];
+        }
+        
+        [super removeAllChildrenWithCleanup:doCleanup];
+        
+        hasChildren_ = NO;
+}
+
+//
+// CCNode property overloads
+// used only when parent is CCSpriteBatchNode
+//
+#pragma mark CCSprite - property overloads
+
+
+-(void) setDirtyRecursively:(BOOL)b
+{
+        dirty_ = recursiveDirty_ = b;
+        // recursively set dirty
+        if( hasChildren_ ) {
+                CCSprite *child;
+                CCARRAY_FOREACH(children_, child)
+                        [child setDirtyRecursively:YES];
+        }
+}
+
+// XXX HACK: optimization
+#define SET_DIRTY_RECURSIVELY() {                                                                       \
+                                        if( usesBatchNode_ && ! recursiveDirty_ ) {     \
+                                                dirty_ = recursiveDirty_ = YES;                         \
+                                                if( hasChildren_)                                                       \
+                                                        [self setDirtyRecursively:YES];                 \
+                                                }                                                                                       \
+                                        }
+
+-(void)setPosition:(CGPoint)pos
+{
+        [super setPosition:pos];
+        SET_DIRTY_RECURSIVELY();
+}
+
+-(void)setPositionInPixels:(CGPoint)pos
+{
+        [super setPositionInPixels:pos];
+        SET_DIRTY_RECURSIVELY();
+}
+
+-(void)setRotation:(float)rot
+{
+        [super setRotation:rot];
+        SET_DIRTY_RECURSIVELY();
+}
+
+-(void)setSkewX:(float)sx
+{
+        [super setSkewX:sx];
+        SET_DIRTY_RECURSIVELY();
+}
+
+-(void)setSkewY:(float)sy
+{
+        [super setSkewY:sy];
+        SET_DIRTY_RECURSIVELY();
+}
+
+-(void)setScaleX:(float) sx
+{
+        [super setScaleX:sx];
+        SET_DIRTY_RECURSIVELY();
+}
+
+-(void)setScaleY:(float) sy
+{
+        [super setScaleY:sy];
+        SET_DIRTY_RECURSIVELY();
+}
+
+-(void)setScale:(float) s
+{
+        [super setScale:s];
+        SET_DIRTY_RECURSIVELY();
+}
+
+-(void) setVertexZ:(float)z
+{
+        [super setVertexZ:z];
+        SET_DIRTY_RECURSIVELY();
+}
+
+-(void)setAnchorPoint:(CGPoint)anchor
+{
+        [super setAnchorPoint:anchor];
+        SET_DIRTY_RECURSIVELY();
+}
+
+-(void)setIsRelativeAnchorPoint:(BOOL)relative
+{
+        NSAssert( ! usesBatchNode_, @"relativeTransformAnchor is invalid in CCSprite");
+        [super setIsRelativeAnchorPoint:relative];
+}
+
+-(void)setVisible:(BOOL)v
+{
+        [super setVisible:v];
+        SET_DIRTY_RECURSIVELY();
+}
+
+-(void)setFlipX:(BOOL)b
+{
+        if( flipX_ != b ) {
+                flipX_ = b;
+                [self setTextureRectInPixels:rectInPixels_ rotated:rectRotated_ untrimmedSize:contentSizeInPixels_];
+        }
+}
+-(BOOL) flipX
+{
+        return flipX_;
+}
+
+-(void) setFlipY:(BOOL)b
+{
+        if( flipY_ != b ) {
+                flipY_ = b;     
+                [self setTextureRectInPixels:rectInPixels_ rotated:rectRotated_ untrimmedSize:contentSizeInPixels_];
+        }       
+}
+-(BOOL) flipY
+{
+        return flipY_;
+}
+
+//
+// RGBA protocol
+//
+#pragma mark CCSprite - RGBA protocol
+-(void) updateColor
+{
+        ccColor4B color4 = {color_.r, color_.g, color_.b, opacity_ };
+        
+        quad_.bl.colors = color4;
+        quad_.br.colors = color4;
+        quad_.tl.colors = color4;
+        quad_.tr.colors = color4;
+        
+        // renders using Sprite Manager
+        if( usesBatchNode_ ) {
+                if( atlasIndex_ != CCSpriteIndexNotInitialized)
+                        [textureAtlas_ updateQuad:&quad_ atIndex:atlasIndex_];
+                else
+                        // no need to set it recursively
+                        // update dirty_, don't update recursiveDirty_
+                        dirty_ = YES;
+        }
+        // self render
+        // do nothing
+}
+
+-(GLubyte) opacity
+{
+        return opacity_;
+}
+
+-(void) setOpacity:(GLubyte) anOpacity
+{
+        opacity_                        = anOpacity;
+
+        // special opacity for premultiplied textures
+        if( opacityModifyRGB_ )
+                [self setColor: colorUnmodified_];
+        
+        [self updateColor];
+}
+
+- (ccColor3B) color
+{
+        if(opacityModifyRGB_)
+                return colorUnmodified_;
+        
+        return color_;
+}
+
+-(void) setColor:(ccColor3B)color3
+{
+        color_ = colorUnmodified_ = color3;
+        
+        if( opacityModifyRGB_ ){
+                color_.r = color3.r * opacity_/255;
+                color_.g = color3.g * opacity_/255;
+                color_.b = color3.b * opacity_/255;
+        }
+        
+        [self updateColor];
+}
+
+-(void) setOpacityModifyRGB:(BOOL)modify
+{
+        ccColor3B oldColor      = self.color;
+        opacityModifyRGB_       = modify;
+        self.color                      = oldColor;
+}
+
+-(BOOL) doesOpacityModifyRGB
+{
+        return opacityModifyRGB_;
+}
+
+//
+// Frames
+//
+#pragma mark CCSprite - Frames
+
+-(void) setDisplayFrame:(CCSpriteFrame*)frame
+{
+        unflippedOffsetPositionFromCenter_ = frame.offsetInPixels;
+
+        CCTexture2D *newTexture = [frame texture];
+        // update texture before updating texture rect
+        if ( newTexture.name != texture_.name )
+                [self setTexture: newTexture];
+        
+        // update rect
+        rectRotated_ = frame.rotated;
+        [self setTextureRectInPixels:frame.rectInPixels rotated:frame.rotated untrimmedSize:frame.originalSizeInPixels];
+}
+
+// XXX deprecated
+-(void) setDisplayFrame: (NSString*) animationName index:(int) frameIndex
+{
+        if( ! animations_ )
+                [self initAnimationDictionary];
+        
+        CCAnimation *a = [animations_ objectForKey: animationName];
+        CCSpriteFrame *frame = [[a frames] objectAtIndex:frameIndex];
+        
+        NSAssert( frame, @"CCSprite#setDisplayFrame. Invalid frame");
+        
+        [self setDisplayFrame:frame];
+}
+
+-(void) setDisplayFrameWithAnimationName: (NSString*) animationName index:(int) frameIndex
+{
+        NSAssert( animationName, @"CCSprite#setDisplayFrameWithAnimationName. animationName must not be nil");
+        
+        CCAnimation *a = [[CCAnimationCache sharedAnimationCache] animationByName:animationName];
+        
+        NSAssert( a, @"CCSprite#setDisplayFrameWithAnimationName: Frame not found");
+        
+        CCSpriteFrame *frame = [[a frames] objectAtIndex:frameIndex];
+        
+        NSAssert( frame, @"CCSprite#setDisplayFrame. Invalid frame");
+        
+        [self setDisplayFrame:frame];
+}
+
+
+-(BOOL) isFrameDisplayed:(CCSpriteFrame*)frame 
+{
+        CGRect r = [frame rect];
+        return ( CGRectEqualToRect(r, rect_) &&
+                        frame.texture.name == self.texture.name );
+}
+
+-(CCSpriteFrame*) displayedFrame
+{       
+        return [CCSpriteFrame frameWithTexture:texture_
+                                                          rectInPixels:rectInPixels_
+                                                                   rotated:rectRotated_
+                                                                        offset:unflippedOffsetPositionFromCenter_
+                                                          originalSize:contentSizeInPixels_];
+}
+
+-(void) addAnimation: (CCAnimation*) anim
+{
+        // lazy alloc
+        if( ! animations_ )
+                [self initAnimationDictionary];
+        
+        [animations_ setObject:anim forKey:[anim name]];
+}
+
+-(CCAnimation*)animationByName: (NSString*) animationName
+{
+        NSAssert( animationName != nil, @"animationName parameter must be non nil");
+    return [animations_ objectForKey:animationName];
+}
+
+#pragma mark CCSprite - CocosNodeTexture protocol
+
+-(void) updateBlendFunc
+{
+        NSAssert( ! usesBatchNode_, @"CCSprite: updateBlendFunc doesn't work when the sprite is rendered using a CCSpriteBatchNode");
+
+        // it's possible to have an untextured sprite
+        if( !texture_ || ! [texture_ hasPremultipliedAlpha] ) {
+                blendFunc_.src = GL_SRC_ALPHA;
+                blendFunc_.dst = GL_ONE_MINUS_SRC_ALPHA;
+                [self setOpacityModifyRGB:NO];
+        } else {
+                blendFunc_.src = CC_BLEND_SRC;
+                blendFunc_.dst = CC_BLEND_DST;
+                [self setOpacityModifyRGB:YES];
+        }
+}
+
+-(void) setTexture:(CCTexture2D*)texture
+{
+        NSAssert( ! usesBatchNode_, @"CCSprite: setTexture doesn't work when the sprite is rendered using a CCSpriteBatchNode");
+        
+        // accept texture==nil as argument
+        NSAssert( !texture || [texture isKindOfClass:[CCTexture2D class]], @"setTexture expects a CCTexture2D. Invalid argument");
+
+        [texture_ release];
+        texture_ = [texture retain];
+        
+        [self updateBlendFunc];
+}
+
+-(CCTexture2D*) texture
+{
+        return texture_;
+}
+
+@end