/*
 * Copyright 2011, Blender Foundation.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * Contributor: 
 *		Jeroen Bakker 
 *		Monique Dewanchand
 */

#include "COM_ScaleOperation.h"

ScaleOperation::ScaleOperation() : NodeOperation() {
	this->addInputSocket(COM_DT_COLOR);
	this->addInputSocket(COM_DT_VALUE);
	this->addInputSocket(COM_DT_VALUE);
	this->addOutputSocket(COM_DT_COLOR);
	this->setResolutionInputSocketIndex(0);
	this->inputOperation = NULL;
	this->inputXOperation = NULL;
	this->inputYOperation = NULL;
}
void ScaleOperation::initExecution() {
	this->inputOperation = this->getInputSocketReader(0);
	this->inputXOperation = this->getInputSocketReader(1);
	this->inputYOperation = this->getInputSocketReader(2);
	this->centerX = this->getWidth()/2.0;
	this->centerY = this->getHeight()/2.0;
}

void ScaleOperation::deinitExecution() {
	this->inputOperation = NULL;
	this->inputXOperation = NULL;
	this->inputYOperation = NULL;
}


void ScaleOperation::executePixel(float *color,float x, float y, PixelSampler sampler, MemoryBuffer *inputBuffers[]) {
	float scaleX[4];
	float scaleY[4];

	this->inputXOperation->read(scaleX, x, y, sampler, inputBuffers);
	this->inputYOperation->read(scaleY, x, y, sampler, inputBuffers);

	const float scx = scaleX[0];
	const float scy = scaleY[0];

	float nx = this->centerX+ (x - this->centerX) / scx;
	float ny = this->centerY+ (y - this->centerY) / scy;
	this->inputOperation->read(color, nx, ny, sampler, inputBuffers);
}

bool ScaleOperation::determineDependingAreaOfInterest(rcti *input, ReadBufferOperation *readOperation, rcti *output) {
	rcti newInput;
	float scaleX[4];
	float scaleY[4];
	
	this->inputXOperation->read(scaleX, 0, 0, COM_PS_NEAREST, NULL);
	this->inputYOperation->read(scaleY, 0, 0, COM_PS_NEAREST, NULL);
	
	const float scx = scaleX[0];
	const float scy = scaleY[0];
	
	newInput.xmax = this->centerX+ (input->xmax - this->centerX) / scx;
	newInput.xmin = this->centerX+ (input->xmin - this->centerX) / scx;
	newInput.ymax = this->centerY+ (input->ymax - this->centerY) / scy;
	newInput.ymin = this->centerY+ (input->ymin - this->centerY) / scy;
	
	return NodeOperation::determineDependingAreaOfInterest(&newInput, readOperation, output);
}


// SCALE ABSOLUTE
ScaleAbsoluteOperation::ScaleAbsoluteOperation() : NodeOperation() {
	this->addInputSocket(COM_DT_COLOR);
	this->addInputSocket(COM_DT_VALUE);
	this->addInputSocket(COM_DT_VALUE);	
	this->addOutputSocket(COM_DT_COLOR);
	this->setResolutionInputSocketIndex(0);
	this->inputOperation = NULL;
	this->inputXOperation= NULL;
	this->inputYOperation = NULL;
}
void ScaleAbsoluteOperation::initExecution() {
	this->inputOperation = this->getInputSocketReader(0);
	this->inputXOperation = this->getInputSocketReader(1);
	this->inputYOperation = this->getInputSocketReader(2);
	this->centerX = this->getWidth()/2.0;
	this->centerY = this->getHeight()/2.0;
}

void ScaleAbsoluteOperation::deinitExecution() {
	this->inputOperation = NULL;
	this->inputXOperation = NULL;
	this->inputYOperation = NULL;
}


void ScaleAbsoluteOperation::executePixel(float *color,float x, float y, PixelSampler sampler, MemoryBuffer *inputBuffers[]) {
	float scaleX[4];
	float scaleY[4];

	this->inputXOperation->read(scaleX, x, y, sampler, inputBuffers);
	this->inputYOperation->read(scaleY, x, y, sampler, inputBuffers);

	const float scx = scaleX[0]; // target absolute scale
	const float scy = scaleY[0]; // target absolute scale
	const float width = this->getWidth();
	const float height = this->getHeight();
	//div
	float relativeXScale = scx/width;
	float relativeYScale = scy/height;

	float nx = this->centerX+ (x - this->centerX) / relativeXScale;
	float ny = this->centerY+ (y - this->centerY) / relativeYScale;
	this->inputOperation->read(color, nx, ny, sampler, inputBuffers);
}

bool ScaleAbsoluteOperation::determineDependingAreaOfInterest(rcti *input, ReadBufferOperation *readOperation, rcti *output) {
	rcti newInput;
	float scaleX[4];
	float scaleY[4];

	this->inputXOperation->read(scaleX, 0, 0, COM_PS_NEAREST, NULL);
	this->inputYOperation->read(scaleY, 0, 0, COM_PS_NEAREST, NULL);

	const float scx = scaleX[0];
	const float scy = scaleY[0];
	const float width = this->getWidth();
	const float height = this->getHeight();
	//div
	float relateveXScale = scx/width;
	float relateveYScale = scy/height;

	newInput.xmax = this->centerX+ (input->xmax - this->centerX) / relateveXScale;
	newInput.xmin = this->centerX+ (input->xmin - this->centerX) / relateveXScale;
	newInput.ymax = this->centerY+ (input->ymax - this->centerY) / relateveYScale;
	newInput.ymin = this->centerY+ (input->ymin - this->centerY) / relateveYScale;

	return NodeOperation::determineDependingAreaOfInterest(&newInput, readOperation, output);
}


// Absolute fixed siez
ScaleFixedSizeOperation::ScaleFixedSizeOperation() : NodeOperation() {
	this->addInputSocket(COM_DT_COLOR);
	this->addOutputSocket(COM_DT_COLOR);
	this->setResolutionInputSocketIndex(0);
	this->inputOperation = NULL;
}
void ScaleFixedSizeOperation::initExecution() {
	this->inputOperation = this->getInputSocketReader(0);
	this->relX = inputOperation->getWidth() / (float)this->newWidth;
	this->relY = inputOperation->getHeight() / (float)this->newHeight;
}

void ScaleFixedSizeOperation::deinitExecution() {
	this->inputOperation = NULL;
}


void ScaleFixedSizeOperation::executePixel(float *color,float x, float y, PixelSampler sampler, MemoryBuffer *inputBuffers[]) {
	this->inputOperation->read(color, x*relX, y*relY, sampler, inputBuffers);
}

bool ScaleFixedSizeOperation::determineDependingAreaOfInterest(rcti *input, ReadBufferOperation *readOperation, rcti *output) {
	rcti newInput;
	
	newInput.xmax = input->xmax *relX;
	newInput.xmin = input->xmin *relX;
	newInput.ymax = input->ymax *relY;
	newInput.ymin = input->ymin *relY;

	return NodeOperation::determineDependingAreaOfInterest(&newInput, readOperation, output);
}

void ScaleFixedSizeOperation::determineResolution(unsigned int resolution[], unsigned int preferredResolution[]) {
	unsigned int nr[2];
	nr[0] = newWidth;
	nr[1] = newHeight;
	NodeOperation::determineResolution(resolution, nr);
	resolution[0] = newWidth;
	resolution[1] = newHeight;
}