void TileDownloader::downloadPicture(unsigned int index)
{
const PictureInfo& info = mPictures[index];
//Downloading all tiles in parallel
{
boost::threadpool::pool tp(info.tiles.size());
for (unsigned int i=0; i<info.tiles.size(); ++i)
tp.schedule(boost::bind(&TileDownloader::downloadPictureTile, this, index, i));
}
//compose all tiles on the canvas
unsigned int width = info.width;
unsigned int height = info.height;
Ogre::Canvas::Context* ctx = new Ogre::Canvas::Context(width, height, false);
for (unsigned int i=0; i<info.tiles.size(); ++i)
{
const TileInfo& tileInfo = info.tiles[i];
Ogre::Image img;
std::stringstream filename;
filename << tileInfo.j << "_" << tileInfo.i << ".jpg";
img.load(filename.str(), Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
float x = (tileInfo.i == 0) ? 0 : 509.0f + (tileInfo.i-1)*510.0f;
float y = (tileInfo.j == 0) ? 0 : 509.0f + (tileInfo.j-1)*510.0f;
ctx->drawImage(img, x, y);
}
//save canvas to jpeg
ctx->saveToFile(info.filePath);
delete ctx;
}
void OgreAppLogic::updateSunCanvas()
{
Ogre::Canvas::Context* ctx = mCanvasTextureSun->getContext();
//ctx->globalCompositeOperation(Ogre::Canvas::DrawingOperator_DestOver);
ctx->clearRect(0, 0, 300, 300); // clear canvas
ctx->fillStyle(Ogre::ColourValue::Black);
ctx->fillRect(0, 0, 300, 300);
ctx->fillStyle(Ogre::ColourValue(0.0f, 0.0f, 0.0f, 0.4f));
ctx->strokeStyle(Ogre::Canvas::ColourConverter::fromRGBA(0, 153, 255, 102));
ctx->save();
ctx->translate(150, 150);
// Earth
time_t now = time(NULL);
struct tm * timeinfo;
timeinfo = localtime(&now);
int sec = timeinfo->tm_sec;
int min = timeinfo->tm_min;
int hr = timeinfo->tm_hour;
ctx->rotate( ((2*Ogre::Math::PI)/60)*sec);// + ((2*Math.PI)/60000)*time.getMilliseconds() );
ctx->translate(105,0);
ctx->fillRect(0,-12,50,24); // Shadow
ctx->drawImage(mEarth, -12.0f, -12.0f);
// Moon
ctx->save();
ctx->rotate( ((2*Ogre::Math::PI)/6)*sec);// + ((2*Math.PI)/6000)*time.getMilliseconds() );
ctx->translate(0.0f, 28.5f);
ctx->drawImage(mMoon, -3.5f, -3.5f);
ctx->restore();
ctx->restore();
ctx->beginPath();
ctx->arc(150, 150, 105, 0, Ogre::Math::PI*2, false); // Earth orbit
ctx->stroke();
ctx->drawImage(mSun, 0.0f, 0.0f, 300.0f, 300.0f);
mCanvasTextureSun->uploadTexture();
}