public static unsafe Texture LoadTexture(
GraphicsDevice gd,
ResourceFactory factory,
Stream assetStream,
PixelFormat format)
{
KtxFile ktxTex2D = Load(assetStream, false);
uint width = ktxTex2D.Header.PixelWidth;
uint height = ktxTex2D.Header.PixelHeight;
if (height == 0)
{
height = width;
}
uint arrayLayers = Math.Max(1, ktxTex2D.Header.NumberOfArrayElements);
uint mipLevels = Math.Max(1, ktxTex2D.Header.NumberOfMipmapLevels);
Texture ret = factory.CreateTexture(TextureDescription.Texture2D(
width, height, mipLevels, arrayLayers,
format, TextureUsage.Sampled));
Texture stagingTex = factory.CreateTexture(TextureDescription.Texture2D(
width, height, mipLevels, arrayLayers,
format, TextureUsage.Staging));
// Copy texture data into staging buffer
for (uint level = 0; level < mipLevels; level++)
{
KtxMipmapLevel mipmap = ktxTex2D.Mipmaps[level];
for (uint layer = 0; layer < arrayLayers; layer++)
{
KtxArrayElement ktxLayer = mipmap.ArrayElements[layer];
Debug.Assert(ktxLayer.Faces.Length == 1);
byte[] pixelData = ktxLayer.Faces[0].Data;
fixed(byte *pixelDataPtr = &pixelData[0])
{
gd.UpdateTexture(stagingTex, (IntPtr)pixelDataPtr, (uint)pixelData.Length,
0, 0, 0, mipmap.Width, mipmap.Height, 1, level, layer);
}
}
}
CommandList copyCL = factory.CreateCommandList();
copyCL.Begin();
for (uint level = 0; level < mipLevels; level++)
{
KtxMipmapLevel mipLevel = ktxTex2D.Mipmaps[level];
for (uint layer = 0; layer < arrayLayers; layer++)
{
copyCL.CopyTexture(
stagingTex, 0, 0, 0, level, layer,
ret, 0, 0, 0, level, layer,
mipLevel.Width, mipLevel.Height, mipLevel.Depth,
1);
}
}
copyCL.End();
gd.SubmitCommands(copyCL);
gd.DisposeWhenIdle(copyCL);
gd.DisposeWhenIdle(stagingTex);
return(ret);
}
public static unsafe Texture LoadTexture(
GraphicsDevice gd,
ResourceFactory factory,
string assetPath,
PixelFormat format)
{
KtxFile tex2D;
using (FileStream fs = File.OpenRead(assetPath))
{
tex2D = KtxFile.Load(fs, false);
}
uint width = tex2D.Header.PixelWidth;
uint height = tex2D.Header.PixelHeight;
if (height == 0)
{
height = width;
}
uint mipLevels = tex2D.Header.NumberOfMipmapLevels;
Texture ret = factory.CreateTexture(TextureDescription.Texture2D(
width, height, mipLevels, 1,
format, TextureUsage.Sampled));
Texture stagingTex = factory.CreateTexture(TextureDescription.Texture2D(
width, height, mipLevels, 1,
format, TextureUsage.Staging));
// Copy texture data into staging buffer
for (uint level = 0; level < mipLevels; level++)
{
KtxMipmap mipmap = tex2D.Faces[0].Mipmaps[level];
byte[] pixelData = mipmap.Data;
fixed(byte *pixelDataPtr = &pixelData[0])
{
gd.UpdateTexture(stagingTex, (IntPtr)pixelDataPtr, (uint)pixelData.Length,
0, 0, 0, mipmap.Width, mipmap.Height, 1, level, 0);
}
}
CommandList copyCL = factory.CreateCommandList();
copyCL.Begin();
for (uint level = 0; level < mipLevels; level++)
{
uint levelWidth = tex2D.Faces[0].Mipmaps[level].Width;
uint levelHeight = tex2D.Faces[0].Mipmaps[level].Height;
copyCL.CopyTexture(stagingTex, 0, 0, 0, level, 0,
ret, 0, 0, 0, level, 0, levelWidth, levelHeight, 1, 1);
}
copyCL.End();
gd.SubmitCommands(copyCL);
gd.DisposeWhenIdle(copyCL);
gd.DisposeWhenIdle(stagingTex);
return(ret);
}
