#include "display/nr-arena-item.h"

#include "display/nr-filter.h"

#include "display/nr-filter-image.h"

#include "display/nr-filter-units.h"

namespace NR {

FilterImage::FilterImage()

{

image = Gdk::Pixbuf::create_from_file("../images/image1.jpg");

//TODO: handle errors

width = image->get_width()+1;

height = image->get_height()+1;

image_pixbuf = image->get_pixels();

}

FilterPrimitive * FilterImage::create() {

return new FilterImage();

}

FilterImage::~FilterImage()

{}

int FilterImage::render(FilterSlot &slot, FilterUnits const &units) {

int w,x,y;

NRPixBlock *in = slot.get(_input);

NRPixBlock *out = new NRPixBlock;

int x0 = in->area.x0, y0 = in->area.y0;

int x1 = in->area.x1, y1 = in->area.y1;

int bbox_x0 = (int) slot.get_arenaitem()->bbox.x0;

int bbox_y0 = (int) slot.get_arenaitem()->bbox.y0;

nr_pixblock_setup_fast(out, in->mode, x0, y0, x1, y1, true);

w = x1 - x0;

double scaleX = width/feImageWidth;

double scaleY = height/feImageHeight;

int coordx,coordy;

unsigned char *out_data = NR_PIXBLOCK_PX(out);

for (x=x0; x < x1; x++){

for (y=y0; y < y1; y++){

//TODO: use interpolation

coordx = int((x - feImageX - bbox_x0)*scaleX);

coordy = int((y - feImageY - bbox_y0)*scaleY);

if (coordx > 0 && coordx < width && coordy > 0 && coordy < height){

out_data[4*((x - x0)+w*(y - y0))] = (unsigned char) image_pixbuf[3*(coordx + width*coordy)]; //Red

out_data[4*((x - x0)+w*(y - y0)) + 1] = (unsigned char) image_pixbuf[3*(coordx + width*coordy) + 1]; //Green

out_data[4*((x - x0)+w*(y - y0)) + 2] = (unsigned char) image_pixbuf[3*(coordx + width*coordy) + 2]; //Blue

out_data[4*((x - x0)+w*(y - y0)) + 3] = 255; //Alpha

}

}

}

out->empty = FALSE;

slot.set(_output, out);

return 0;

}

void FilterImage::set_region(SVGLength x, SVGLength y, SVGLength width, SVGLength height){

feImageX=x.computed;

feImageY=y.computed;

feImageWidth=width.computed;

feImageHeight=height.computed;

}

FilterTraits FilterImage::get_input_traits() {

return TRAIT_PARALLER;

}

} /* namespace NR */