/// <summary>
/// Creates a cached texture for the specifed texture, using the specified path
/// as a lookup key.
/// </summary>
public int CreateCachedTexture(BLP texture, string texturePath, TextureWrapMode textureWrapMode = TextureWrapMode.Repeat)
{
if (texture == null)
{
throw new ArgumentNullException(nameof(texture));
}
int textureID = GL.GenTexture();
if (texture.GetCompressionType() == TextureCompressionType.DXTC)
{
try
{
LoadDXTTexture(textureID, texture);
}
catch (GraphicsErrorException gex)
{
Log.Warn($"GraphicsErrorException in CreateCachedTexture (failed to create DXT texture): {gex.Message}\n" +
"The texture will be loaded as a bitmap instead.");
}
finally
{
// Load a fallback bitmap instead
using (Bitmap mipZero = texture.GetMipMap(0))
{
LoadBitmapTexture(textureID, mipZero);
}
}
}
else
{
using (Bitmap mipZero = texture.GetMipMap(0))
{
LoadBitmapTexture(textureID, mipZero);
}
}
// Use linear mipmapped filtering
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.LinearMipmapLinear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)textureWrapMode);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)textureWrapMode);
int maximalMipLevel = texture.GetMipMapCount() == 0 ? 0 : texture.GetMipMapCount() - 1;
GL.TexParameterI(TextureTarget.Texture2D, TextureParameterName.TextureMaxLevel, ref maximalMipLevel);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureBaseLevel, 0);
this.GLTextureCache.Add(texturePath.ConvertPathSeparatorsToCurrentNativeSeparator().ToUpperInvariant(), textureID);
return(textureID);
}