private void ImportTexture(ITexture tex, string file, GliFormat imgOriginalFormat)
{
try
{
models.Images.AddImage(tex, file, imgOriginalFormat);
tex = null; // images is now owner
}
catch (ImagesModel.MipmapMismatch e)
{
// silently generate mipmaps and import
if (models.Images.NumMipmaps > 1 && tex.NumMipmaps == 1)
{
var tmp = tex.GenerateMipmapLevels(models.Images.NumMipmaps);
ImportTexture(tmp, file, imgOriginalFormat);
}
else
{
// don't just discard the mipmaps
models.Window.ShowErrorDialog(e.Message);
}
}
catch (Exception e)
{
models.Window.ShowErrorDialog(e.Message);
}
finally
{
tex?.Dispose();
}
}
/// <summary>
/// creates a thumbnail for one image layer/mipmap
/// </summary>
/// <param name="size">maximum width/height of the thumbnail</param>
/// <param name="texture">source texture</param>
/// <param name="dstFormat">destination texture format</param>
/// <param name="layer">source layer</param>
/// <returns>texture with width, height smaller or equal to size. One layer and one mipmap</returns>
public TextureArray2D CreateThumbnail(int size, ITexture texture,
SharpDX.DXGI.Format dstFormat, int layer)
{
Debug.Assert(ImageFormat.IsSupported(dstFormat));
Debug.Assert(ImageFormat.IsSupported(texture.Format));
// determine dimensions of output texture
var width = 0;
var height = 0;
if (texture.Size.Width > texture.Size.Height)
{
width = size;
height = (texture.Size.Height * size) / texture.Size.Width;
}
else
{
height = size;
width = (texture.Size.Width * size) / texture.Size.Height;
}
Debug.Assert(width <= size);
Debug.Assert(height <= size);
var res = new TextureArray2D(1, 1, new Size3(width, height), dstFormat, false);
var dev = Device.Get();
quad.Bind(false);
if (texture.Is3D)
{
dev.Pixel.Set(convert3D.Pixel);
}
else
{
dev.Pixel.Set(convert2D.Pixel);
}
// compute which mipmap has the closest fit
var mipmap = 0;
var curWidth = texture.Size.Width;
while (curWidth >= width)
{
++mipmap;
curWidth /= 2;
}
// mipmap just jumped over the optimal size
mipmap = Math.Max(0, mipmap - 1);
ITexture tmpTex = null;
if (texture.NumMipmaps < mipmap + 1)
{
// generate new texture with mipmaps
tmpTex = texture.GenerateMipmapLevels(mipmap + 1);
dev.Pixel.SetShaderResource(0, tmpTex.GetSrView(layer, mipmap));
}
else
{
dev.Pixel.SetShaderResource(0, texture.GetSrView(layer, mipmap));
}
dev.Pixel.SetSampler(0, sampler);
dev.OutputMerger.SetRenderTargets(res.GetRtView(0, 0));
dev.SetViewScissors(width, height);
dev.DrawFullscreenTriangle();
// remove bindings
dev.Pixel.SetShaderResource(0, null);
dev.OutputMerger.SetRenderTargets((RenderTargetView)null);
quad.Unbind();
tmpTex?.Dispose();
return(res);
}
