
#include "ofxCvGrayscaleImage.h"
#include "ofxCvColorImage.h"
#include "ofxCvFloatImage.h"




//--------------------------------------------------------------------------------
ofxCvFloatImage::ofxCvFloatImage( const ofxCvFloatImage& mom ) {
    cvCopy( mom.getCvImage(), cvImage, 0 );
}

//--------------------------------------------------------------------------------
void ofxCvFloatImage::allocate( int w, int h ) {
	cvImage = cvCreateImage( cvSize(w,h), IPL_DEPTH_32F, 1 );
	cvImageTemp	= cvCreateImage( cvSize(w,h), IPL_DEPTH_32F, 1 );
	cvGrayscaleImage = cvCreateImage( cvSize(w,h), IPL_DEPTH_8U, 1 );
	pixels = new unsigned char[w*h];
	pixelsAsFloats = new float[w*h];
    width = w;
	height = h;

    if( bUseTexture ) {
        tex.allocate(width, height, GL_LUMINANCE);
    }
}

// Set Pixel Data - Arrays
//--------------------------------------------------------------------------------
void ofxCvFloatImage::setFromPixels( float * _pixels, int w, int h ) {
	for( int i = 0; i < h; i++ ) {
		memcpy( cvImage->imageData+(i*cvImage->widthStep), _pixels+(i*w), w*sizeof(float));
	}
}

//--------------------------------------------------------------------------------
void ofxCvFloatImage::drawWithScale( float x, float y, float scaleMin, float scaleMax){
    drawWithScale(x,y,width, height, scaleMin, scaleMax);
}

//--------------------------------------------------------------------------------
void ofxCvFloatImage::drawWithScale( float x, float y, float w, float h, float scaleMin, float scaleMax){
    if( bUseTexture ) {
        // note, this is a bit ineficient, as we have to
        // copy the data out of the cvImage into the pixel array
        // and then upload to texture.  We should add
        // to the texture class an override for pixelstorei
        // that allows stepped-width image upload:
        tex.loadData(getPixels(scaleMin, scaleMax), width, height, GL_LUMINANCE);
        tex.draw(x,y,w,h);
    }
}

//--------------------------------------------------------------------------------
unsigned char*  ofxCvFloatImage::getPixels(float scaleMin, float scaleMax){
    float range = (scaleMax - scaleMin);
    float scale = 255/range;
    float offset = - (scaleMin * scale);  // ie, 0.5 - 1 = scale by (255*2), subtract 255, 128-255 = scale by 1/2, subtract 128
    cvConvertScale( cvImage, cvGrayscaleImage, scale, offset );
    for( int i = 0; i < height; i++ ) {
		memcpy( pixels+(i*width),
                cvGrayscaleImage->imageData+(i*cvGrayscaleImage->widthStep), width );
	}
	return pixels;
}

//--------------------------------------------------------------------------------
float * ofxCvFloatImage::getPixelsAsFloats(){
    // ok??
    for( int i = 0; i < height; i++ ) {
		memcpy( pixelsAsFloats+(i*width),
                cvGrayscaleImage->imageData+(i*(cvGrayscaleImage->widthStep / 4)), width*4 );
	}
	return pixelsAsFloats;
}


// Set Pixel Data - Arrays
//--------------------------------------------------------------------------------
void ofxCvFloatImage::operator =	( ofxCvGrayscaleImage& mom ) {
	if( mom.width == width && mom.height == height ) {
        cvConvert( mom.getCvImage(), cvImage );
	} else {
        cout << "error in =, images are different sizes" << endl;
	}
}

//--------------------------------------------------------------------------------
void ofxCvFloatImage::operator =	( ofxCvColorImage& mom ) {
	if( mom.width == width && mom.height == height ) {
		cvCvtColor( mom.getCvImage(), cvImage, CV_RGB2GRAY );
	} else {
        cout << "error in =, images are different sizes" << endl;
	}
}

//--------------------------------------------------------------------------------
void ofxCvFloatImage::operator =	( ofxCvFloatImage& mom ) {
	if( mom.width == width && mom.height == height ) {
		cvCopy( mom.getCvImage(), cvImage, 0 );
	} else {
        cout << "error in =, images are different sizes" << endl;
	}
}


//--------------------------------------------------------------------------------
void ofxCvFloatImage::operator -= ( ofxCvFloatImage& mom ) {
	if( mom.width == width && mom.height == height ) {
		cvSub( cvImage, mom.getCvImage(), cvImageTemp );
		swapTemp();
	} else {
        cout << "error in -=, images are different sizes" << endl;
	}
}

//--------------------------------------------------------------------------------
void ofxCvFloatImage::operator += ( ofxCvFloatImage& mom ) {
	if( mom.width == width && mom.height == height ) {
		cvAdd( cvImage, mom.getCvImage(), cvImageTemp );
		swapTemp();
	} else {
        cout << "error in +=, images are different sizes" << endl;
	}
}

//--------------------------------------------------------------------------------
void ofxCvFloatImage::operator *= ( ofxCvFloatImage& mom ) {
	if( mom.width == width && mom.height == height ) {
		cvMul( cvImage, mom.getCvImage(), cvImageTemp );
		swapTemp();
	} else {
        cout << "error in *=, images are different sizes" << endl;
	}
}

//--------------------------------------------------------------------------------
void ofxCvFloatImage::operator -=	( float scalar ){
    cvSubS(cvImage, cvScalar(scalar), cvImageTemp);
}
//--------------------------------------------------------------------------------
void ofxCvFloatImage::operator +=	( float scalar ){
    cvAddS(cvImage, cvScalar(scalar), cvImageTemp);
}

//--------------------------------------------------------------------------------
void ofxCvFloatImage::operator *=	( float scalar ){
    // does this exist in opencv?
    int totalPixels = cvImage->width*cvImage->height;
    for (int i = 0; i < totalPixels; i++){
        ((float*)cvImage->imageData)[i] *= scalar;
    }
}
//--------------------------------------------------------------------------------
void ofxCvFloatImage::operator /=    ( float scalar ){
    // does this exist in opencv?
    int totalPixels = cvImage->width*cvImage->height;
    for (int i = 0; i < totalPixels; i++){
        ((float*)cvImage->imageData)[i] *= scalar;
    }
}

//--------------------------------------------------------------------------------
void ofxCvFloatImage::addWeighted( ofxCvGrayscaleImage& mom, float f ) {
	if( mom.width == width && mom.height == height ) {
         IplImage* cvTemp = cvCreateImage( cvSize(width,height), IPL_DEPTH_32F, 1 );
         cvConvertScale( mom.getCvImage(), cvTemp, 1, 0 );
         cvAddWeighted( cvTemp, f, cvImage, 1.0f-f,0, cvImageTemp );
         swapTemp();
         cvReleaseImage( &cvTemp );
    } else {
        cout << "error in addWeighted, images are different sizes" << endl;
    }
}

// Image Transformation Operations
//--------------------------------------------------------------------------------
void ofxCvFloatImage::resize( int w, int h ) {

    // note, one image copy operation could be ommitted by
    // reusing the temporal image storage

    IplImage* temp = cvCreateImage( cvSize(w,h), IPL_DEPTH_32F, 1 );
    cvResize( cvImage, temp );
    clear();
    allocate( w, h );
    cvCopy( temp, cvImage );
    cvReleaseImage( &temp );
}

//--------------------------------------------------------------------------------
void ofxCvFloatImage::scaleIntoMe( ofxCvFloatImage& mom, int interpolationMethod){

    if ((interpolationMethod != CV_INTER_NN) ||
        (interpolationMethod != CV_INTER_LINEAR) ||
        (interpolationMethod != CV_INTER_AREA) ||
        (interpolationMethod != CV_INTER_CUBIC) ){
        printf("error in scaleIntoMe / interpolationMethod, setting to CV_INTER_NN \n");
    }
    cvResize( mom.getCvImage(), cvImage, interpolationMethod );

    /*
    you can pass in:
    CV_INTER_NN - nearest-neigbor interpolation,
    CV_INTER_LINEAR - bilinear interpolation (used by default)
    CV_INTER_AREA - resampling using pixel area relation. It is preferred method for image decimation that gives moire-free results. In case of zooming it is similar to CV_INTER_NN method.
    CV_INTER_CUBIC - bicubic interpolation.
    ----> http://opencvlibrary.sourceforge.net/CvReference
    */

}
