/// <summary>
/// Generates the mip maps.
/// </summary>
/// <param name="image">The image.</param>
/// <param name="libraryData">The library data.</param>
/// <param name="request">The request.</param>
/// <exception cref="TexLibraryException">
/// Not implemented !
/// or
/// Mipmaps generation failed
/// </exception>
private void GenerateMipMaps(TexImage image, DxtTextureLibraryData libraryData, MipMapsGenerationRequest request)
{
Log.Info("Generating Mipmaps ... ");
var filter = TEX_FILTER_FLAGS.TEX_FILTER_DEFAULT;
switch (request.Filter)
{
case Filter.MipMapGeneration.Nearest:
filter |= TEX_FILTER_FLAGS.TEX_FILTER_POINT;
break;
case Filter.MipMapGeneration.Linear:
filter |= TEX_FILTER_FLAGS.TEX_FILTER_LINEAR;
break;
case Filter.MipMapGeneration.Cubic:
filter |= TEX_FILTER_FLAGS.TEX_FILTER_CUBIC;
break;
case Filter.MipMapGeneration.Box:
// Box filter is supported only for power of two textures
filter |= image.IsPowerOfTwo() ? TEX_FILTER_FLAGS.TEX_FILTER_FANT : TEX_FILTER_FLAGS.TEX_FILTER_LINEAR;
break;
default:
filter |= TEX_FILTER_FLAGS.TEX_FILTER_FANT;
break;
}
// Don't use WIC if we have a Float texture as mipmaps are clamped to [0, 1]
// TODO: Report bug to DirectXTex
var isPowerOfTwoAndFloat = image.IsPowerOfTwo() && (image.Format == PixelFormat.R16G16_Float || image.Format == PixelFormat.R16G16B16A16_Float);
if (isPowerOfTwoAndFloat)
{
filter = TEX_FILTER_FLAGS.TEX_FILTER_FORCE_NON_WIC;
}
HRESULT hr;
var scratchImage = new ScratchImage();
if (libraryData.Metadata.dimension == TEX_DIMENSION.TEX_DIMENSION_TEXTURE3D)
{
Log.Info("Only the box and nearest(point) filters are supported for generating Mipmaps with 3D texture.");
if ((filter & TEX_FILTER_FLAGS.TEX_FILTER_FANT) == 0 && (filter & TEX_FILTER_FLAGS.TEX_FILTER_POINT) == 0)
{
filter = (TEX_FILTER_FLAGS)((int)filter & 0xf00000);
filter |= TEX_FILTER_FLAGS.TEX_FILTER_FANT;
}
hr = Utilities.GenerateMipMaps3D(libraryData.DxtImages, libraryData.DxtImages.Length, ref libraryData.Metadata, filter, 0, scratchImage);
}
else
{
hr = Utilities.GenerateMipMaps(libraryData.DxtImages, libraryData.DxtImages.Length, ref libraryData.Metadata, filter, 0, scratchImage);
}
if (hr != HRESULT.S_OK)
{
Log.Error("Mipmaps generation failed: " + hr);
throw new TextureToolsException("Mipmaps generation failed: " + hr);
}
// Freeing Memory
if (image.DisposingLibrary != null) image.DisposingLibrary.Dispose(image);
libraryData.Image = scratchImage;
libraryData.Metadata = libraryData.Image.metadata;
libraryData.DxtImages = libraryData.Image.GetImages();
image.DisposingLibrary = this;
UpdateImage(image, libraryData);
}
/// <summary>
/// Generates the mip maps.
/// </summary>
/// <param name="image">The image.</param>
/// <param name="libraryData">The library data.</param>
/// <param name="request">The request.</param>
private void GenerateMipMaps(TexImage image, PvrTextureLibraryData libraryData, MipMapsGenerationRequest request)
{
Log.Info("Generating Mipmaps ... ");
EResizeMode filter;
switch (request.Filter)
{
case Filter.MipMapGeneration.Linear:
filter = EResizeMode.eResizeLinear;
break;
case Filter.MipMapGeneration.Cubic:
filter = EResizeMode.eResizeCubic;
break;
case Filter.MipMapGeneration.Nearest:
filter = EResizeMode.eResizeNearest;
break;
default:
filter = EResizeMode.eResizeCubic;
break;
}
libraryData.Texture.GenerateMIPMaps(filter);
UpdateImage(image, libraryData);
}