public static D3D11.ID3D11Texture2D LoadTexture2DFromMappedTexture(EngineDevice device, MemoryMappedTexture <int> mappedTexture, bool generateMiplevels)
{
// Create the texture
var dataRectangle = new D3D11.SubresourceData(
mappedTexture.Pointer,
mappedTexture.Width * 4);
D3D11.ID3D11Texture2D result;
if (generateMiplevels)
{
result = device.DeviceD3D11_1.CreateTexture2D(new D3D11.Texture2DDescription
{
Width = mappedTexture.Width,
Height = mappedTexture.Height,
ArraySize = 1,
BindFlags = D3D11.BindFlags.ShaderResource | D3D11.BindFlags.RenderTarget,
Usage = D3D11.ResourceUsage.Default,
CpuAccessFlags = D3D11.CpuAccessFlags.None,
Format = DEFAULT_TEXTURE_FORMAT,
MipLevels = 0,
OptionFlags = D3D11.ResourceOptionFlags.None | D3D11.ResourceOptionFlags.GenerateMips,
SampleDescription = new SampleDescription(1, 0)
},
new D3D11.SubresourceData[]
{
dataRectangle, dataRectangle, dataRectangle, dataRectangle,
dataRectangle, dataRectangle, dataRectangle, dataRectangle,
dataRectangle, dataRectangle, dataRectangle, dataRectangle
});
// Auto generate miplevels
using (var shaderResourceView = device.DeviceD3D11_1.CreateShaderResourceView(result))
{
device.DeviceImmediateContextD3D11.GenerateMips(shaderResourceView);
}
}
else
{
result = device.DeviceD3D11_1.CreateTexture2D(new D3D11.Texture2DDescription
{
Width = mappedTexture.Width,
Height = mappedTexture.Height,
ArraySize = 1,
BindFlags = D3D11.BindFlags.ShaderResource,
Usage = D3D11.ResourceUsage.Default,
CpuAccessFlags = D3D11.CpuAccessFlags.None,
Format = DEFAULT_TEXTURE_FORMAT,
MipLevels = 1,
OptionFlags = D3D11.ResourceOptionFlags.None,
SampleDescription = new SampleDescription(1, 0)
},
new D3D11.SubresourceData[] { dataRectangle });
}
return(result);
}
/// <summary>
/// Converts a System.Drawing.Bitmap to a DirectX 11 texture object.
/// </summary>
/// <param name="device">Device on which the resource should be created.</param>
/// <param name="bitmap">The source bitmap.</param>
/// <param name="mipLevels">Total count of levels for mipmapping.</param>
internal static D3D11.ID3D11Texture2D LoadTextureFromBitmap(EngineDevice device, GDI.Bitmap bitmap, int mipLevels)
{
device.EnsureNotNull(nameof(device));
bitmap.EnsureNotNull(nameof(bitmap));
mipLevels.EnsurePositiveOrZero(nameof(mipLevels));
D3D11.ID3D11Texture2D?result = null;
// Lock bitmap so it can be accessed for texture loading
var bitmapData = bitmap.LockBits(
new GDI.Rectangle(0, 0, bitmap.Width, bitmap.Height),
ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
try
{
// Open a reading stream for bitmap memory
var dataRectangle = new D3D11.SubresourceData(bitmapData.Scan0, bitmap.Width * 4);
// Load the texture
result = device.Internals.DeviceD3D11_1.CreateTexture2D(
new D3D11.Texture2DDescription
{
BindFlags = D3D11.BindFlags.ShaderResource | D3D11.BindFlags.RenderTarget,
CpuAccessFlags = D3D11.CpuAccessFlags.None,
Format = GraphicsHelper.Internals.DEFAULT_TEXTURE_FORMAT,
OptionFlags = D3D11.ResourceOptionFlags.None | D3D11.ResourceOptionFlags.GenerateMips,
MipLevels = 0,
Usage = D3D11.ResourceUsage.Default,
Width = bitmap.Width,
Height = bitmap.Height,
ArraySize = 1,
SampleDescription = new SampleDescription(1, 0)
},
new[]
{
dataRectangle, dataRectangle, dataRectangle, dataRectangle,
dataRectangle, dataRectangle, dataRectangle, dataRectangle,
dataRectangle, dataRectangle, dataRectangle, dataRectangle
});
// Workaround for now... auto generate mip-levels
using var shaderResourceView = device.Internals.DeviceD3D11_1.CreateShaderResourceView(result);
device.Internals.DeviceImmediateContextD3D11.GenerateMips(shaderResourceView);
}
finally
{
// Free bitmap-access resources
bitmap.UnlockBits(bitmapData);
}
return(result);
}
