src/yafraycore/imagesplitter.cc

Go to the documentation of this file.

#include <core_api/imagesplitter.h>
#include <iostream>

#include <algorithm>

__BEGIN_YAFRAY

// currently only supports creation of scanrow-ordered tiles
// shuffling would of course be easy, but i don't find that too usefull really,
// it does maximum damage to the coherency gain and visual feedback is medicore too

imageSpliter_t::imageSpliter_t(int w, int h, int x0,int y0, int bsize, tilesOrderType torder): blocksize(bsize), tilesorder(torder)
{
        int nx, ny;
        nx = (w+blocksize-1)/blocksize;
        ny = (h+blocksize-1)/blocksize;
        for(int j=0; j<ny; ++j)
        {
                for(int i=0; i<nx; ++i)
                {
                        region_t r;
                        r.x = x0 + i*blocksize;
                        r.y = y0 + j*blocksize;
                        r.w = std::min(blocksize, x0+w-r.x);
                        r.h = std::min(blocksize, y0+h-r.y);
                        regions.push_back(r);
                }
        }
        switch(tilesorder)
        {
                case RANDOM:    std::random_shuffle( regions.begin(), regions.end() );
                case LINEAR:
                default:        break;
        }
}

bool imageSpliter_t::getArea(int n, renderArea_t &area)
{
        if(n<0 || n>=(int)regions.size()) return false;
        region_t &r = regions[n];
        area.X = r.x;
        area.Y = r.y;
        area.W = r.w;
        area.H = r.h;
        return true;
}

__END_YAFRAY

---