/*
 * 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_CompositorOperation.h"
#include "COM_SocketConnection.h"
#include "BLI_listbase.h"
#include "DNA_scene_types.h"
#include "BKE_image.h"

extern "C" {
	#include "RE_pipeline.h"
	#include "RE_shader_ext.h"
	#include "RE_render_ext.h"
	#include "MEM_guardedalloc.h"
#include "render_types.h"
}
#include "PIL_time.h"


CompositorOperation::CompositorOperation() : NodeOperation() {
	this->addInputSocket(COM_DT_COLOR);
	this->addInputSocket(COM_DT_VALUE);

	this->setScene(NULL);
	this->outputBuffer = NULL;
	this->imageInput = NULL;
	this->alphaInput = NULL;
}

void CompositorOperation::initExecution() {
	// When initializing the tree during initial load the width and height can be zero.
	this->imageInput = getInputSocketReader(0);
	this->alphaInput = getInputSocketReader(1);
	if (this->getWidth() * this->getHeight() != 0) {
		this->outputBuffer=(float*) MEM_callocN(this->getWidth()*this->getHeight()*4*sizeof(float), "CompositorOperation");
	}
	const Scene * scene = this->scene;
	Render* re= RE_GetRender(scene->id.name);
	RenderResult *rr= RE_AcquireResultWrite(re);
	if (rr) {
		if (rr->rectf  != NULL) {
			MEM_freeN(rr->rectf);
		}
		rr->rectf= outputBuffer;
	}
	if (re) {
		RE_ReleaseResult(re);
		re = NULL;
	}
	
}

void CompositorOperation::deinitExecution() {
	this->outputBuffer = NULL;
	this->imageInput = NULL;
	this->alphaInput = NULL;
}


void CompositorOperation::executeRegion(rcti *rect, unsigned int tileNumber, MemoryBuffer** memoryBuffers) {
	float color[8]; // 7 is enough
	float* buffer = this->outputBuffer;

	if (!buffer) return;
	int x1 = rect->xmin;
	int y1 = rect->ymin;
	int x2 = rect->xmax;
	int y2 = rect->ymax;
	int offset = (y1*this->getWidth() + x1 ) * 4;
	int x;
	int y;
	bool breaked = false;

	for (y = y1 ; y < y2 && (!breaked); y++) {
		for (x = x1 ; x < x2 && (!breaked) ; x++) {
			imageInput->read(color, x, y, COM_PS_NEAREST, memoryBuffers);
			if (alphaInput != NULL) {
				alphaInput->read(&(color[3]), x, y, COM_PS_NEAREST, memoryBuffers);
			}
			buffer[offset] = color[0];
			buffer[offset+1] = color[1];
			buffer[offset+2] = color[2];
			buffer[offset+3] = color[3];
			offset +=4;
			if (tree->test_break && tree->test_break(tree->tbh)) {
				breaked = true;
			}
		}
		offset += (this->getWidth()-(x2-x1))*4;
	}
}

void CompositorOperation::determineResolution(unsigned int resolution[], unsigned int preferredResolution[]) {
	int width = this->scene->r.xsch*this->scene->r.size/100;
	int height= this->scene->r.ysch*this->scene->r.size/100;
	preferredResolution[0] = width;
	preferredResolution[1] = height;
	
	NodeOperation::determineResolution(resolution, preferredResolution);

	resolution[0] = width;
	resolution[1] = height;
}