/// <summary>
/// Initializes a new instance of the <see cref="Buffer" /> class.
/// </summary>
/// <param name="description">The description.</param>
/// <param name="viewFlags">Type of the buffer.</param>
/// <param name="viewFormat">The view format.</param>
/// <param name="dataPointer">The data pointer.</param>
protected Buffer InitializeFromImpl(BufferDescription description, BufferFlags viewFlags, PixelFormat viewFormat, IntPtr dataPointer)
{
bufferDescription = description;
ViewFlags = viewFlags;
bool isCompressed;
OpenGLConvertExtensions.ConvertPixelFormat(GraphicsDevice, ref viewFormat, out TextureInternalFormat, out TextureFormat, out TextureType, out bufferTextureElementSize, out isCompressed);
ViewFormat = viewFormat;
Recreate(dataPointer);
if (GraphicsDevice != null)
{
GraphicsDevice.RegisterBufferMemoryUsage(SizeInBytes);
}
return(this);
}
private void InitializeFromImpl(DataBox[] dataBoxes = null)
{
if (ParentTexture != null)
{
CopyParentAttributes();
}
if (TextureId == 0)
{
TextureTarget = GetTextureTarget(Dimension);
bool compressed;
OpenGLConvertExtensions.ConvertPixelFormat(GraphicsDevice, ref textureDescription.Format, out TextureInternalFormat, out TextureFormat, out TextureType, out TexturePixelSize, out compressed);
DepthPitch = Description.Width * Description.Height * TexturePixelSize;
RowPitch = Description.Width * TexturePixelSize;
IsDepthBuffer = ((Description.Flags & TextureFlags.DepthStencil) != 0);
if (IsDepthBuffer)
{
HasStencil = InternalHasStencil(Format);
}
else
{
HasStencil = false;
}
if ((Description.Flags & TextureFlagsCustomResourceId) != 0)
{
return;
}
using (var openglContext = GraphicsDevice.UseOpenGLCreationContext())
{
TextureTotalSize = ComputeBufferTotalSize();
if (Description.Usage == GraphicsResourceUsage.Staging)
{
InitializeStagingPixelBufferObject(dataBoxes);
return; // TODO: This return causes "GraphicsDevice.RegisterTextureMemoryUsage(SizeInBytes);" not to get entered. Is that okay?
}
// Depth textures are renderbuffers for now // TODO: PERFORMANCE: Why? I think we should change that so we can sample them directly.
// TODO: enable switch // TODO: What does this comment even mean?
IsRenderbuffer = !Description.IsShaderResource;
// Force to renderbuffer if MSAA is on because we don't support MSAA textures ATM (and they don't exist on OpenGL ES).
if (Description.IsMultisample)
{
// TODO: Ideally the caller of this method should be aware of this "force to renderbuffer",
// because the caller won't be able to bind it as a texture.
IsRenderbuffer = true;
}
if (IsRenderbuffer)
{
CreateRenderbuffer();
return; // TODO: This return causes "GraphicsDevice.RegisterTextureMemoryUsage(SizeInBytes);" not to get entered. Is that okay?
}
GL.GenTextures(1, out TextureId);
GL.BindTexture(TextureTarget, TextureId);
SetFilterMode();
if (Description.MipLevels == 0)
{
throw new NotImplementedException();
}
var setSize = TextureSetSize(TextureTarget);
for (var arrayIndex = 0; arrayIndex < Description.ArraySize; ++arrayIndex)
{
int offsetArray = arrayIndex * Description.MipLevels;
for (int mipLevel = 0; mipLevel < Description.MipLevels; ++mipLevel)
{
DataBox dataBox;
Int3 dimensions = new Int3(CalculateMipSize(Description.Width, mipLevel),
CalculateMipSize(Description.Height, mipLevel),
CalculateMipSize(Description.Depth, mipLevel));
if (dataBoxes != null && mipLevel < dataBoxes.Length)
{
if (setSize > 1 && !compressed && dataBoxes[mipLevel].RowPitch != dimensions.X * TexturePixelSize)
{
throw new NotSupportedException("Can't upload texture with pitch in glTexImage2D/3D.");
}
// Might be possible, need to check API better.
dataBox = dataBoxes[offsetArray + mipLevel];
}
else
{
dataBox = new DataBox();
}
switch (TextureTarget)
{
case TextureTarget.Texture1D:
CreateTexture1D(compressed, dimensions.X, mipLevel, dataBox);
break;
case TextureTarget.Texture2D:
case TextureTarget.TextureCubeMap:
CreateTexture2D(compressed, dimensions.X, dimensions.Y, mipLevel, arrayIndex, dataBox);
break;
case TextureTarget.Texture3D:
CreateTexture3D(compressed, dimensions.X, dimensions.Y, dimensions.Z, mipLevel, dataBox);
break;
case TextureTarget.Texture2DArray:
CreateTexture2DArray(compressed, dimensions.X, dimensions.Y, mipLevel, arrayIndex, dataBox);
break;
}
}
}
GL.BindTexture(TextureTarget, 0); // This unbinds the texture.
if (openglContext.CommandList != null)
{
// If we messed up with some states of a command list, mark dirty states
openglContext.CommandList.boundShaderResourceViews[openglContext.CommandList.activeTexture] = null;
}
}
GraphicsDevice.RegisterTextureMemoryUsage(SizeInBytes);
}
}