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Coin / src / rendering / SoOffscreenWGLData.cpp

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#ifdef HAVE_CONFIG_H
#include <config.h>
#endif // HAVE_CONFIG_H

#ifdef HAVE_WGL

#include <windows.h>
#include <Inventor/errors/SoDebugError.h>
#include "SoOffscreenWGLData.h"

// Pixels-pr-mm.
SbVec2f
SoOffscreenWGLData::getResolution(void)
{
  HDC devctx = CreateCompatibleDC(NULL);
  if (devctx == NULL) {
    SoDebugError::postWarning("SoOffscreenWGLData::getResolution",
                              "Couldn't create a device context.");
    return SbVec2f(72.0f / 25.4f, 72.0f / 25.4f); // fall back to 72dpi
  }
  float resx = (float)GetDeviceCaps(devctx, LOGPIXELSX);
  float resy = (float)GetDeviceCaps(devctx, LOGPIXELSY);
  (void)DeleteDC(devctx);

  return SbVec2f(resx / 25.4f, resy / 25.4f);
}

#endif // HAVE_WGL