/// <summary>
///
/// </summary>
private void LoadVolumeTexture()
{
Debug.Assert(this.TextureType == TextureType.ThreeD);
using (AutoTimer auto = new AutoTimer(textureLoadMeter)) {
// DDS load?
if (name.EndsWith(".dds")) {
Stream stream = TextureManager.Instance.FindResourceData(name);
// use D3DX to load the image directly from the stream
int numMips = numRequestedMipmaps + 1;
// check if mip map volume textures are supported
if (!(devCaps.TextureCaps.SupportsMipVolumeMap)) {
// no mip map support for this kind of textures :(
numMipmaps = 0;
numMips = 1;
}
// Determine D3D pool to use
D3D.Pool pool;
if ((usage & TextureUsage.Dynamic) != 0)
pool = D3D.Pool.Default;
else
pool = D3D.Pool.Managed;
Debug.Assert(volumeTexture == null);
Debug.Assert(texture == null);
// load the cube texture from the image data stream directly
volumeTexture =
TextureLoader.FromVolumeStream(device, stream, (int)stream.Length, 0, 0, 0, numMips,
D3D.Usage.None,
D3D.Format.Unknown,
pool,
Filter.Triangle | Filter.Dither,
Filter.Box, 0);
// store off a base reference
texture = volumeTexture;
// set the image data attributes
VolumeDescription desc = volumeTexture.GetLevelDescription(0);
d3dPool = desc.Pool;
// set src and dest attributes to the same, we can't know
SetSrcAttributes(desc.Width, desc.Height, desc.Depth, D3DHelper.ConvertEnum(desc.Format));
SetFinalAttributes(desc.Width, desc.Height, desc.Depth, D3DHelper.ConvertEnum(desc.Format));
isLoaded = true;
internalResourcesCreated = true;
stream.Dispose();
} else {
// find & load resource data into stream
Stream stream = TextureManager.Instance.FindResourceData(name);
int pos = name.LastIndexOf('.');
string ext = name.Substring(pos + 1);
Image img = Image.FromStream(stream, ext);
LoadImage(img);
stream.Dispose();
}
} // using
}
private void CreateVolumeTexture()
{
// we must have those defined here
Debug.Assert(srcWidth > 0 && srcHeight > 0);
// determine which D3D9 pixel format we'll use
D3D.Format d3dPixelFormat = ChooseD3DFormat();
// at this point, Ogre checks to see if this texture format works,
// but we go on and figure out the rest of our info first.
// set the appropriate usage based on the usage of this texture
D3D.Usage d3dUsage =
((usage & TextureUsage.RenderTarget) == TextureUsage.RenderTarget) ? D3D.Usage.RenderTarget : D3D.Usage.None;
// how many mips to use?
int numMips = numRequestedMipmaps + 1;
// Check dynamic textures
if ((usage & TextureUsage.Dynamic) != 0) {
if (CanUseDynamicTextures(d3dUsage, ResourceType.VolumeTexture, d3dPixelFormat)) {
d3dUsage |= D3D.Usage.Dynamic;
dynamicTextures = true;
} else {
dynamicTextures = false;
}
}
// check if mip maps are supported on hardware
mipmapsHardwareGenerated = false;
if (devCaps.TextureCaps.SupportsMipVolumeMap) {
if (((usage & TextureUsage.AutoMipMap) == TextureUsage.AutoMipMap)
&& numRequestedMipmaps > 0)
{
// use auto.gen. if available
mipmapsHardwareGenerated = this.CanAutoGenMipMaps(d3dUsage, ResourceType.VolumeTexture, d3dPixelFormat);
if (mipmapsHardwareGenerated) {
d3dUsage |= D3D.Usage.AutoGenerateMipMap;
numMips = 0;
}
}
} else {
// no mip map support for this kind of texture
numMipmaps = 0;
numMips = 1;
}
// check texture requirements
D3D.TextureRequirements texRequire = new D3D.TextureRequirements();
texRequire.Width = srcWidth;
texRequire.Height = srcHeight;
texRequire.NumberMipLevels = numMips;
texRequire.Format = d3dPixelFormat;
// NOTE: Although texRequire is an out parameter, it actually does
// use the data passed in with that object.
TextureLoader.CheckTextureRequirements(device, d3dUsage, Pool.Default, out texRequire);
numMips = texRequire.NumberMipLevels;
d3dPixelFormat = texRequire.Format;
Debug.Assert(volumeTexture == null);
Debug.Assert(texture == null);
log.InfoFormat("Created normal texture {0}", this.Name);
// create the texture
volumeTexture = new D3D.VolumeTexture(
device,
srcWidth,
srcHeight,
srcDepth,
numMips,
d3dUsage,
d3dPixelFormat,
d3dPool);
// store base reference to the texture
texture = volumeTexture;
// set the final texture attributes
VolumeDescription desc = volumeTexture.GetLevelDescription(0);
SetFinalAttributes(desc.Width, desc.Height, desc.Depth, D3DHelper.ConvertEnum(desc.Format));
if (mipmapsHardwareGenerated)
texture.AutoGenerateFilterType = GetBestFilterMethod();
}