/*! returns range of displays that are affected by the given
region of pixels (ie, that together are guaranteed to cover
that pixel region */
box2i WallConfig::affectedDisplays(const box2i &pixelRegion) const
{
vec2i lo
= (pixelRegion.lower+bezelPixelsPerDisplay())
/ (pixelsPerDisplay+bezelPixelsPerDisplay());
vec2i hi
= (pixelRegion.upper + pixelsPerDisplay - vec2i(1))
/ (pixelsPerDisplay+bezelPixelsPerDisplay());
// vec2i hi
// = divRoundUp(pixelRegion.upper,pixelsPerDisplay+bezelPixelsPerDisplay());
if (hi.x > numDisplays.x || hi.y > numDisplays.y) {
PING;
PRINT(pixelRegion);
PRINT(totalPixels());
throw std::runtime_error("invalid region in 'affectedDispalys()')");
}
return box2i(lo,hi);
}
void LocalFrameBuffer::clear(const uint32 fbChannelFlags)
{
if (fbChannelFlags & OSP_FB_ACCUM) {
// it is only necessary to reset the accumID,
// LocalFrameBuffer_accumulateTile takes care of clearing the
// accumulation buffers
memset(tileAccumID, 0, tiles*sizeof(int32));
// always also clear error buffer (if present)
if (hasVarianceBuffer) {
for (int i = 0; i < tiles; i++)
tileErrorBuffer[i] = inf;
errorRegion.clear();
// initially create one region covering the complete image
errorRegion.push_back(box2i(vec2i(0), vec2i(tilesx, divRoundUp(size.y, TILE_SIZE))));
}
}
}
/*! return the pixel region in the global display wall space that
display at given coordinates is covering */
box2i WallConfig::regionOfDisplay(const vec2i &displayID) const
{
const vec2i lo = displayID * (pixelsPerDisplay + bezelPixelsPerDisplay());
return box2i(lo, lo + pixelsPerDisplay);
}