layer.cc File Reference

#include <cstdio>
#include <utility>
#include <vector>
#include <spdlog/spdlog.h>
#include <scroom/impl/threadpoolimpl.hh>
#include <scroom/memoryblobs.hh>
#include <scroom/stuff.hh>
#include <scroom/threadpool.hh>
#include <scroom/tile.hh>
#include <scroom/tiledbitmapinterface.hh>
#include <scroom/tiledbitmaplayer.hh>
#include <scroom/viewinterface.hh>
#include "local.hh"

Include dependency graph for layer.cc:

Classes
class	DataFetcher

Functions
static Scroom::MemoryBlobs::PageProvider::Ptr	createProvider (double width, double height, int bpp)

Function Documentation

createProvider()

static Scroom::MemoryBlobs::PageProvider::Ptr createProvider ( double  width, double  height, int  bpp  )

static

{
  const double tileCount = (width * height) / (TILESIZE * TILESIZE);
  const double tileSize  = (bpp / 8.0) * TILESIZE * TILESIZE;
 
  const double guessedTileSizeAfterCompression = tileSize / 100;
  const int    pagesize                        = 4096;
  const int    pagesPerBlock                   = std::max(int(ceil(guessedTileSizeAfterCompression / 10 / pagesize)), 1);
 
  const int blockSize  = pagesPerBlock * pagesize;
  const int blockCount = std::max(int(ceil(tileCount / 10)), 64);
 
  spdlog::debug("Creating a PageProvider providing {} blocks of {} bytes", blockCount, blockSize);
  return Scroom::MemoryBlobs::PageProvider::create(blockCount, blockSize);
}

Referenced by Layer::create().

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