/Users/sjg/iPhone/WhirlyGlobe/WhirlyGlobeSrc/WhirlyGlobeLib/include/TextureAtlas.h

/*
 *  TextureAtlas.h
 *  WhirlyGlobeLib
 *
 *  Created by Steve Gifford on 3/28/11.
 *  Copyright 2011 mousebird consulting
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

#import <vector>
#import <UIKit/UIKit.h>
#import <OpenGLES/ES1/gl.h>
#import <OpenGLES/ES1/glext.h>
#import <OpenGLES/ES2/gl.h>
#import <OpenGLES/ES2/glext.h>

#import "Identifiable.h"
#import "WhirlyVector.h"
#import "Texture.h"
#import "GlobeScene.h"

namespace WhirlyGlobe
{

class SubTexture : public Identifiable
{
public:
    
    void setFromTex(const TexCoord &texOrg,const TexCoord &texDest);
    
    // Convert the texture coordinate to the destination texture
    TexCoord processTexCoord(const TexCoord &);
    
    // Convert a list of texture coordinates to the dest texture
    void processTexCoords(std::vector<TexCoord> &);
    
    bool operator < (const SubTexture &that) const { return this->myId < that.myId; }
    
    SimpleIdentity texId;

    Affine2f trans;
};
    
}

@interface TextureAtlas : NSObject
{
    WhirlyGlobe::SimpleIdentity texId;
    unsigned int texSizeX,texSizeY;
    unsigned int gridSizeX,gridSizeY;
    unsigned int cellSizeX,cellSizeY;
    bool *layoutGrid;  
    
    NSMutableArray *images;
}

@property (nonatomic,readonly) WhirlyGlobe::SimpleIdentity texId;

- (id)inithWithTexSizeX:(unsigned int)texSizeX texSizeY:(unsigned int)texSizeY cellSizeX:(unsigned int)cellSizeX cellSizeY:(unsigned int)cellSizeY;
    
- (BOOL)addImage:(UIImage *)image texOrg:(WhirlyGlobe::TexCoord &)org texDest:(WhirlyGlobe::TexCoord &)dest;

- (BOOL)getImageLayout:(UIImage *)image texOrg:(WhirlyGlobe::TexCoord &)org texDest:(WhirlyGlobe::TexCoord &)dest;

- (WhirlyGlobe::Texture *)createTexture:(UIImage **)retImage;

@end

@interface TextureAtlasBuilder : NSObject
{
    unsigned int texSizeX,texSizeY;
    unsigned int cellSizeX,cellSizeY;
    
    NSMutableArray *atlases;
    
    std::vector<WhirlyGlobe::SubTexture> mappings;
}

- (id)initWithTexSizeX:(unsigned int)texSizeX texSizeY:(unsigned int)texSizeY;

- (WhirlyGlobe::SimpleIdentity)addImage:(UIImage *)image;

- (void)processIntoScene:(WhirlyGlobe::GlobeScene *)scene texIDs:(std::set<WhirlyGlobe::SimpleIdentity> *)texIDs;

@end