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+/*
+ * cocos2d for iPhone: http://www.cocos2d-iphone.org
+ *
+ * Copyright (c) 2009 On-Core
+ *
+ * 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 "ccMacros.h"
+#import "CCGrid.h"
+#import "CCTexture2D.h"
+#import "CCDirector.h"
+#import "CCGrabber.h"
+
+#import "Platforms/CCGL.h"
+#import "Support/CGPointExtension.h"
+#import "Support/ccUtils.h"
+
+#ifdef __IPHONE_OS_VERSION_MAX_ALLOWED
+#import "Platforms/iOS/CCDirectorIOS.h"
+#endif // __IPHONE_OS_VERSION_MAX_ALLOWED
+
+#pragma mark -
+#pragma mark CCGridBase
+
+@implementation CCGridBase
+
+@synthesize reuseGrid = reuseGrid_;
+@synthesize texture = texture_;
+@synthesize grabber = grabber_;
+@synthesize gridSize = gridSize_;
+@synthesize step = step_;
+
++(id) gridWithSize:(ccGridSize)gridSize texture:(CCTexture2D*)texture flippedTexture:(BOOL)flipped
+{
+        return [[[self alloc] initWithSize:gridSize texture:texture flippedTexture:flipped] autorelease];
+}
+
++(id) gridWithSize:(ccGridSize)gridSize
+{
+        return [[(CCGridBase*)[self alloc] initWithSize:gridSize] autorelease];
+}
+
+-(id) initWithSize:(ccGridSize)gridSize texture:(CCTexture2D*)texture flippedTexture:(BOOL)flipped
+{
+        if( (self=[super init]) ) {
+                
+                active_ = NO;
+                reuseGrid_ = 0;
+                gridSize_ = gridSize;
+
+                self.texture = texture;
+                isTextureFlipped_ = flipped;
+                
+                CGSize texSize = [texture_ contentSizeInPixels];
+                step_.x = texSize.width / gridSize_.x;
+                step_.y = texSize.height / gridSize_.y;
+                
+                grabber_ = [[CCGrabber alloc] init];
+                [grabber_ grab:texture_];
+                
+                [self calculateVertexPoints];
+        }
+        return self;
+}
+
+-(id)initWithSize:(ccGridSize)gSize
+{
+        CCDirector *director = [CCDirector sharedDirector];
+        CGSize s = [director winSizeInPixels];
+        
+        unsigned long POTWide = ccNextPOT(s.width);
+        unsigned long POTHigh = ccNextPOT(s.height);
+        
+#ifdef __IPHONE_OS_VERSION_MAX_ALLOWED
+        EAGLView *glview = [[CCDirector sharedDirector] openGLView];
+        NSString *pixelFormat = [glview pixelFormat];
+
+        CCTexture2DPixelFormat format = [pixelFormat isEqualToString: kEAGLColorFormatRGB565] ? kCCTexture2DPixelFormat_RGB565 : kCCTexture2DPixelFormat_RGBA8888;
+#else
+        CCTexture2DPixelFormat format = kCCTexture2DPixelFormat_RGBA8888;
+#endif
+        
+        void *data = calloc((int)(POTWide * POTHigh * 4), 1);
+        if( ! data ) {
+                CCLOG(@"cocos2d: CCGrid: not enough memory");
+                [self release];
+                return nil;
+        }
+        
+        CCTexture2D *texture = [[CCTexture2D alloc] initWithData:data pixelFormat:format pixelsWide:POTWide pixelsHigh:POTHigh contentSize:s];
+        free( data );
+
+        if( ! texture ) {
+                CCLOG(@"cocos2d: CCGrid: error creating texture");
+                [self release];
+                return nil;
+        }
+        
+        self = [self initWithSize:gSize texture:texture flippedTexture:NO];
+        
+        [texture release];
+        
+        return self;
+}
+- (NSString*) description
+{
+        return [NSString stringWithFormat:@"<%@ = %08X | Dimensions = %ix%i>", [self class], self, gridSize_.x, gridSize_.y];
+}
+
+- (void) dealloc
+{
+        CCLOGINFO(@"cocos2d: deallocing %@", self);
+
+        [self setActive: NO];
+
+        [texture_ release];
+        [grabber_ release];
+        [super dealloc];
+}
+
+// properties
+-(BOOL) active
+{
+        return active_;
+}
+
+-(void) setActive:(BOOL)active
+{
+        active_ = active;
+        if( ! active ) {
+                CCDirector *director = [CCDirector sharedDirector];
+                ccDirectorProjection proj = [director projection];
+                [director setProjection:proj];
+        }
+}
+
+-(BOOL) isTextureFlipped
+{
+        return isTextureFlipped_;
+}
+
+-(void) setIsTextureFlipped:(BOOL)flipped
+{
+        if( isTextureFlipped_ != flipped ) {
+                isTextureFlipped_ = flipped;
+                [self calculateVertexPoints];
+        }
+}
+
+// This routine can be merged with Director
+#ifdef __IPHONE_OS_VERSION_MAX_ALLOWED
+-(void)applyLandscape
+{
+        CCDirector *director = [CCDirector sharedDirector];
+        
+        CGSize winSize = [director displaySizeInPixels];
+        float w = winSize.width / 2;
+        float h = winSize.height / 2;
+
+        ccDeviceOrientation orientation  = [director deviceOrientation];
+
+        switch (orientation) {
+                case CCDeviceOrientationLandscapeLeft:
+                        glTranslatef(w,h,0);
+                        glRotatef(-90,0,0,1);
+                        glTranslatef(-h,-w,0);
+                        break;
+                case CCDeviceOrientationLandscapeRight:
+                        glTranslatef(w,h,0);
+                        glRotatef(90,0,0,1);
+                        glTranslatef(-h,-w,0);
+                        break;
+                case CCDeviceOrientationPortraitUpsideDown:
+                        glTranslatef(w,h,0);
+                        glRotatef(180,0,0,1);
+                        glTranslatef(-w,-h,0);
+                        break;
+                default:
+                        break;
+        }
+}
+#endif
+
+-(void)set2DProjection
+{
+        CGSize  winSize = [[CCDirector sharedDirector] winSizeInPixels];
+        
+        glLoadIdentity();
+        glViewport(0, 0, winSize.width, winSize.height);
+        glMatrixMode(GL_PROJECTION);
+        glLoadIdentity();
+        ccglOrtho(0, winSize.width, 0, winSize.height, -1024, 1024);
+        glMatrixMode(GL_MODELVIEW);
+}
+
+// This routine can be merged with Director
+-(void)set3DProjection
+{
+        CCDirector *director = [CCDirector sharedDirector];
+        
+        CGSize  winSize = [director displaySizeInPixels];
+        
+        glViewport(0, 0, winSize.width, winSize.height);
+        glMatrixMode(GL_PROJECTION);
+        glLoadIdentity();
+        gluPerspective(60, (GLfloat)winSize.width/winSize.height, 0.5f, 1500.0f);
+        
+        glMatrixMode(GL_MODELVIEW);     
+        glLoadIdentity();
+        gluLookAt( winSize.width/2, winSize.height/2, [director getZEye],
+                          winSize.width/2, winSize.height/2, 0,
+                          0.0f, 1.0f, 0.0f
+                          );
+}
+
+-(void)beforeDraw
+{
+        [self set2DProjection];
+        [grabber_ beforeRender:texture_];
+}
+
+-(void)afterDraw:(CCNode *)target
+{
+        [grabber_ afterRender:texture_];
+        
+        [self set3DProjection];
+#ifdef __IPHONE_OS_VERSION_MAX_ALLOWED
+        [self applyLandscape];
+#endif
+
+        if( target.camera.dirty ) {
+
+                CGPoint offset = [target anchorPointInPixels];
+
+                //
+                // XXX: Camera should be applied in the AnchorPoint
+                //
+                ccglTranslate(offset.x, offset.y, 0);
+                [target.camera locate];
+                ccglTranslate(-offset.x, -offset.y, 0);
+        }
+                
+        glBindTexture(GL_TEXTURE_2D, texture_.name);
+
+        [self blit];
+}
+
+-(void)blit
+{
+        [NSException raise:@"GridBase" format:@"Abstract class needs implementation"];
+}
+
+-(void)reuse
+{
+        [NSException raise:@"GridBase" format:@"Abstract class needs implementation"];
+}
+
+-(void)calculateVertexPoints
+{
+        [NSException raise:@"GridBase" format:@"Abstract class needs implementation"];
+}
+
+@end
+
+////////////////////////////////////////////////////////////
+
+#pragma mark -
+#pragma mark CCGrid3D
+@implementation CCGrid3D
+
+-(void)dealloc
+{
+        free(texCoordinates);
+        free(vertices);
+        free(indices);
+        free(originalVertices);
+        [super dealloc];
+}
+
+-(void)blit
+{
+        NSInteger n = gridSize_.x * gridSize_.y;
+        
+        // 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_TEXTURE_COORD_ARRAY
+        // Unneeded states: GL_COLOR_ARRAY
+        glDisableClientState(GL_COLOR_ARRAY);   
+        
+        glVertexPointer(3, GL_FLOAT, 0, vertices);
+        glTexCoordPointer(2, GL_FLOAT, 0, texCoordinates);
+        glDrawElements(GL_TRIANGLES, (GLsizei) n*6, GL_UNSIGNED_SHORT, indices);
+        
+        // restore GL default state
+        glEnableClientState(GL_COLOR_ARRAY);
+}
+
+-(void)calculateVertexPoints
+{
+        float width = (float)texture_.pixelsWide;
+        float height = (float)texture_.pixelsHigh;
+        float imageH = texture_.contentSizeInPixels.height;
+        
+        int x, y, i;
+        
+        vertices = malloc((gridSize_.x+1)*(gridSize_.y+1)*sizeof(ccVertex3F));
+        originalVertices = malloc((gridSize_.x+1)*(gridSize_.y+1)*sizeof(ccVertex3F));
+        texCoordinates = malloc((gridSize_.x+1)*(gridSize_.y+1)*sizeof(CGPoint));
+        indices = malloc(gridSize_.x*gridSize_.y*sizeof(GLushort)*6);
+        
+        float *vertArray = (float*)vertices;
+        float *texArray = (float*)texCoordinates;
+        GLushort *idxArray = (GLushort *)indices;
+        
+        for( x = 0; x < gridSize_.x; x++ )
+        {
+                for( y = 0; y < gridSize_.y; y++ )
+                {
+                        NSInteger idx = (y * gridSize_.x) + x;
+                        
+                        float x1 = x * step_.x;
+                        float x2 = x1 + step_.x;
+                        float y1 = y * step_.y;
+                        float y2 = y1 + step_.y;
+                        
+                        GLushort a = x * (gridSize_.y+1) + y;
+                        GLushort b = (x+1) * (gridSize_.y+1) + y;
+                        GLushort c = (x+1) * (gridSize_.y+1) + (y+1);
+                        GLushort d = x * (gridSize_.y+1) + (y+1);
+                        
+                        GLushort        tempidx[6] = { a, b, d, b, c, d };
+                        
+                        memcpy(&idxArray[6*idx], tempidx, 6*sizeof(GLushort));
+                        
+                        int l1[4] = { a*3, b*3, c*3, d*3 };
+                        ccVertex3F      e = {x1,y1,0};
+                        ccVertex3F      f = {x2,y1,0};
+                        ccVertex3F      g = {x2,y2,0};
+                        ccVertex3F      h = {x1,y2,0};
+                        
+                        ccVertex3F l2[4] = { e, f, g, h };
+                        
+                        int tex1[4] = { a*2, b*2, c*2, d*2 };
+                        CGPoint tex2[4] = { ccp(x1, y1), ccp(x2, y1), ccp(x2, y2), ccp(x1, y2) };
+                        
+                        for( i = 0; i < 4; i++ )
+                        {
+                                vertArray[ l1[i] ] = l2[i].x;
+                                vertArray[ l1[i] + 1 ] = l2[i].y;
+                                vertArray[ l1[i] + 2 ] = l2[i].z;
+                                
+                                texArray[ tex1[i] ] = tex2[i].x / width;
+                                if( isTextureFlipped_ )
+                                        texArray[ tex1[i] + 1 ] = (imageH - tex2[i].y) / height;
+                                else
+                                        texArray[ tex1[i] + 1 ] = tex2[i].y / height;
+                        }
+                }
+        }
+        
+        memcpy(originalVertices, vertices, (gridSize_.x+1)*(gridSize_.y+1)*sizeof(ccVertex3F));
+}
+
+-(ccVertex3F)vertex:(ccGridSize)pos
+{
+        NSInteger index = (pos.x * (gridSize_.y+1) + pos.y) * 3;
+        float *vertArray = (float *)vertices;
+        
+        ccVertex3F      vert = { vertArray[index], vertArray[index+1], vertArray[index+2] };
+        
+        return vert;
+}
+
+-(ccVertex3F)originalVertex:(ccGridSize)pos
+{
+        NSInteger index = (pos.x * (gridSize_.y+1) + pos.y) * 3;
+        float *vertArray = (float *)originalVertices;
+        
+        ccVertex3F      vert = { vertArray[index], vertArray[index+1], vertArray[index+2] };
+        
+        return vert;
+}
+
+-(void)setVertex:(ccGridSize)pos vertex:(ccVertex3F)vertex
+{
+        NSInteger index = (pos.x * (gridSize_.y+1) + pos.y) * 3;
+        float *vertArray = (float *)vertices;
+        vertArray[index] = vertex.x;
+        vertArray[index+1] = vertex.y;
+        vertArray[index+2] = vertex.z;
+}
+
+-(void)reuse
+{
+        if ( reuseGrid_ > 0 )
+        {
+                memcpy(originalVertices, vertices, (gridSize_.x+1)*(gridSize_.y+1)*sizeof(ccVertex3F));
+                reuseGrid_--;
+        }
+}
+
+@end
+
+////////////////////////////////////////////////////////////
+
+#pragma mark -
+#pragma mark CCTiledGrid3D
+
+@implementation CCTiledGrid3D
+
+-(void)dealloc
+{
+        free(texCoordinates);
+        free(vertices);
+        free(indices);
+        free(originalVertices);
+        [super dealloc];
+}
+
+-(void)blit
+{
+        NSInteger n = gridSize_.x * gridSize_.y;
+        
+        // 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_TEXTURE_COORD_ARRAY
+        // Unneeded states: GL_COLOR_ARRAY
+        glDisableClientState(GL_COLOR_ARRAY);   
+        
+        glVertexPointer(3, GL_FLOAT, 0, vertices);
+        glTexCoordPointer(2, GL_FLOAT, 0, texCoordinates);
+        glDrawElements(GL_TRIANGLES, (GLsizei) n*6, GL_UNSIGNED_SHORT, indices);
+
+        // restore default GL state
+        glEnableClientState(GL_COLOR_ARRAY);
+}
+
+-(void)calculateVertexPoints
+{
+        float width = (float)texture_.pixelsWide;
+        float height = (float)texture_.pixelsHigh;
+        float imageH = texture_.contentSizeInPixels.height;
+        
+        NSInteger numQuads = gridSize_.x * gridSize_.y;
+        
+        vertices = malloc(numQuads*12*sizeof(GLfloat));
+        originalVertices = malloc(numQuads*12*sizeof(GLfloat));
+        texCoordinates = malloc(numQuads*8*sizeof(GLfloat));
+        indices = malloc(numQuads*6*sizeof(GLushort));
+        
+        float *vertArray = (float*)vertices;
+        float *texArray = (float*)texCoordinates;
+        GLushort *idxArray = (GLushort *)indices;
+        
+        int x, y;
+        
+        for( x = 0; x < gridSize_.x; x++ )
+        {
+                for( y = 0; y < gridSize_.y; y++ )
+                {
+                        float x1 = x * step_.x;
+                        float x2 = x1 + step_.x;
+                        float y1 = y * step_.y;
+                        float y2 = y1 + step_.y;
+                        
+                        *vertArray++ = x1;
+                        *vertArray++ = y1;
+                        *vertArray++ = 0;
+                        *vertArray++ = x2;
+                        *vertArray++ = y1;
+                        *vertArray++ = 0;
+                        *vertArray++ = x1;
+                        *vertArray++ = y2;
+                        *vertArray++ = 0;
+                        *vertArray++ = x2;
+                        *vertArray++ = y2;
+                        *vertArray++ = 0;
+                        
+                        float newY1 = y1;
+                        float newY2 = y2;
+                        
+                        if( isTextureFlipped_ ) {
+                                newY1 = imageH - y1;
+                                newY2 = imageH - y2;
+                        }
+
+                        *texArray++ = x1 / width;
+                        *texArray++ = newY1 / height;
+                        *texArray++ = x2 / width;
+                        *texArray++ = newY1 / height;
+                        *texArray++ = x1 / width;
+                        *texArray++ = newY2 / height;
+                        *texArray++ = x2 / width;
+                        *texArray++ = newY2 / height;
+                }
+        }
+        
+        for( x = 0; x < numQuads; x++)
+        {
+                idxArray[x*6+0] = x*4+0;
+                idxArray[x*6+1] = x*4+1;
+                idxArray[x*6+2] = x*4+2;
+                
+                idxArray[x*6+3] = x*4+1;
+                idxArray[x*6+4] = x*4+2;
+                idxArray[x*6+5] = x*4+3;
+        }
+        
+        memcpy(originalVertices, vertices, numQuads*12*sizeof(GLfloat));
+}
+
+-(void)setTile:(ccGridSize)pos coords:(ccQuad3)coords
+{
+        NSInteger idx = (gridSize_.y * pos.x + pos.y) * 4 * 3;
+        float *vertArray = (float*)vertices;
+        memcpy(&vertArray[idx], &coords, sizeof(ccQuad3));
+}
+
+-(ccQuad3)originalTile:(ccGridSize)pos
+{
+        NSInteger idx = (gridSize_.y * pos.x + pos.y) * 4 * 3;
+        float *vertArray = (float*)originalVertices;
+        
+        ccQuad3 ret;
+        memcpy(&ret, &vertArray[idx], sizeof(ccQuad3));
+        
+        return ret;
+}
+
+-(ccQuad3)tile:(ccGridSize)pos
+{
+        NSInteger idx = (gridSize_.y * pos.x + pos.y) * 4 * 3;
+        float *vertArray = (float*)vertices;
+        
+        ccQuad3 ret;
+        memcpy(&ret, &vertArray[idx], sizeof(ccQuad3));
+        
+        return ret;
+}
+
+-(void)reuse
+{
+        if ( reuseGrid_ > 0 )
+        {
+                NSInteger numQuads = gridSize_.x * gridSize_.y;
+                
+                memcpy(originalVertices, vertices, numQuads*12*sizeof(GLfloat));
+                reuseGrid_--;
+        }
+}
+
+@end