/// <summary>
/// Retrieves a pointer to the IDirect3DSurface9 for one of the specified texture's mip levels.
/// </summary>
/// <param name="texture">The texture to retrieve a mip level from.</param>
/// <param name="level">The index of the mip level.</param>
/// <returns>A pointer to the mip level's surface.</returns>
public static unsafe void *GetSurfaceLevel(this Texture2D texture, int level)
{
void *pTexture = texture.GetIDirect3DTexture9();
void *pGetSurfaceLevel = COMUtils.AccessVTable(pTexture, VTables.IDirect3DTexture9.GetSurfaceLevel);
void *pSurface;
var getSurfaceLevel = (GetSurfaceLevelDelegate)Marshal.GetDelegateForFunctionPointer(new IntPtr(pGetSurfaceLevel), typeof(GetSurfaceLevelDelegate));
var rv = getSurfaceLevel(pTexture, 0, &pSurface);
if (rv == 0)
{
return(pSurface);
}
else
{
throw new COMException("GetSurfaceLevel failed", rv);
}
}
public static unsafe uint GetRefreshRate(this GraphicsDevice device)
{
void *pDevice = GetIDirect3DDevice9(device);
void *pGetDisplayMode = COMUtils.AccessVTable(pDevice, VTables.IDirect3DDevice9.GetDisplayMode);
var getDisplayMode = (GetDisplayModeDelegate)Marshal.GetDelegateForFunctionPointer(new IntPtr(pGetDisplayMode), typeof(GetDisplayModeDelegate));
D3DDISPLAYMODE displayMode;
var rv = getDisplayMode(pDevice, 0, out displayMode);
if (rv == 0)
{
return(displayMode.RefreshRate);
}
else
{
throw new COMException("GetDisplayMode failed", rv);
}
}
