/// <summary>
///
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="internalFormat"></param>
/// <param name="elementCount"></param>
/// <param name="usage"></param>
/// <param name="noDataCopyed"></param>
/// <returns></returns>
public static Texture CreateBufferTexture <T>(uint internalFormat, int elementCount, BufferUsage usage, bool noDataCopyed = false) where T : struct
{
var buffer = new TextureBuffer <T>(usage, noDataCopyed);
buffer.Create(elementCount);
BufferPtr bufferPtr = buffer.GetBufferPtr();
return(bufferPtr.DumpBufferTexture(internalFormat, autoDispose: true));
}
protected override void DoInitialize()
{
this.buildListsRenderer.Initialize();
this.resolve_lists.Initialize();
{
var texture = new Texture(TextureTarget.Texture2D,
new NullImageFiller(MAX_FRAMEBUFFER_WIDTH, MAX_FRAMEBUFFER_HEIGHT, OpenGL.GL_R32UI, OpenGL.GL_RED_INTEGER, OpenGL.GL_UNSIGNED_BYTE),
new SamplerParameters(TextureWrapping.Repeat, TextureWrapping.Repeat, TextureWrapping.Repeat, TextureFilter.Nearest, TextureFilter.Nearest));
texture.Initialize();
this.headTexture = texture;
OpenGL.BindImageTexture(0, this.headTexture.Id, 0, true, 0, OpenGL.GL_READ_WRITE, OpenGL.GL_R32UI);
}
// Create buffer for clearing the head pointer texture
//var buffer = new IndependentBuffer<uint>(BufferTarget.PixelUnpackBuffer, BufferUsage.StaticDraw, false);
using (var buffer = new PixelUnpackBuffer <uint>(BufferUsage.StaticDraw, false))
{
buffer.Create(MAX_FRAMEBUFFER_WIDTH * MAX_FRAMEBUFFER_HEIGHT);
// NOTE: not all initial values are zero in this unmanged array.
//unsafe
//{
// var array = (uint*)buffer.Header.ToPointer();
// for (int i = 0; i < MAX_FRAMEBUFFER_WIDTH * MAX_FRAMEBUFFER_HEIGHT; i++)
// {
// array[i] = 0;
// }
//}
this.headClearBufferPtr = buffer.GetBufferPtr() as PixelUnpackBufferPtr;
}
// Create the atomic counter buffer
using (var buffer = new AtomicCounterBuffer <uint>(BufferUsage.DynamicCopy, false))
{
buffer.Create(1);
this.atomicCountBufferPtr = buffer.GetBufferPtr() as AtomicCounterBufferPtr;
}
// Bind it to a texture (for use as a TBO)
using (var buffer = new TextureBuffer <vec4>(BufferUsage.DynamicCopy, noDataCopyed: false))
{
buffer.Create(elementCount: MAX_FRAMEBUFFER_WIDTH * MAX_FRAMEBUFFER_HEIGHT * 3);
IndependentBufferPtr bufferPtr = buffer.GetBufferPtr();
Texture texture = bufferPtr.DumpBufferTexture(OpenGL.GL_RGBA32UI, autoDispose: true);
texture.Initialize();
bufferPtr.Dispose();// dispose it ASAP.
this.linkedListTexture = texture;
}
{
OpenGL.BindImageTexture(1, this.linkedListTexture.Id, 0, false, 0, OpenGL.GL_WRITE_ONLY, OpenGL.GL_RGBA32UI);
}
OpenGL.ClearDepth(1.0f);
}
private void UpdateResources(int width, int height)
{
{
if (this.headTexture != null)
{
this.headTexture.Dispose();
}
int level = 0, border = 0;
uint internalformat = GL.GL_R32UI, format = GL.GL_RED_INTEGER, type = GL.GL_UNSIGNED_BYTE;
var storage = new TexImage2D(TexImage2D.Target.Texture2D, level, internalformat, width, height, border, format, type);
var texture = new Texture(TextureTarget.Texture2D, storage,
TexParameter.Create(TexParameter.PropertyName.TextureWrapT, (int)GL.GL_REPEAT),
TexParameter.Create(TexParameter.PropertyName.TextureWrapS, (int)GL.GL_REPEAT),
TexParameter.Create(TexParameter.PropertyName.TextureWrapR, (int)GL.GL_REPEAT),
TexParameter.Create(TexParameter.PropertyName.TextureMinFilter, (int)GL.GL_NEAREST),
TexParameter.Create(TexParameter.PropertyName.TextureMagFilter, (int)GL.GL_NEAREST)
);
texture.Initialize();
this.headTexture = texture;
}
// Create buffer for clearing the head pointer texture
{
if (this.headClearBuffer != null)
{
this.headClearBuffer.Dispose();
}
int length = width * height;
// NOTE: not all initial values are zero in this unmanged array.
PixelUnpackBuffer buffer = PixelUnpackBuffer.Create(typeof(uint), length, BufferUsage.StaticDraw);
// initialize buffer's value to 0.
//unsafe
//{
// IntPtr pointer = ptr.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (uint*)pointer.ToPointer();
// for (int i = 0; i < MAX_FRAMEBUFFER_WIDTH * MAX_FRAMEBUFFER_HEIGHT; i++)
// {
// array[i] = 0;
// }
//}
// another way to initialize buffer's value to 0.
//using (var data = new UnmanagedArray<uint>(1))
//{
// data[0] = 0;
// ptr.ClearBufferData(OpenGL.GL_UNSIGNED_INT, OpenGL.GL_RED, OpenGL.GL_UNSIGNED_INT, data);
//}
this.headClearBuffer = buffer;
}
// Bind it to a texture (for use as a TBO)
{
if (this.linkedListTexture != null)
{
this.linkedListTexture.Dispose();
}
int length = width * height * 3;
TextureBuffer buffer = TextureBuffer.Create(typeof(vec4), length, BufferUsage.DynamicCopy);
uint internalFormat = GL.GL_RGBA32UI;
Texture texture = buffer.DumpBufferTexture(internalFormat, autoDispose: true);
texture.Initialize();
buffer.Dispose();// dispose it ASAP.
this.linkedListTexture = texture;
}
}
protected override void DoInitialize()
{
this.buildListsRenderer.Initialize();
this.resolve_lists.Initialize();
{
var texture = new Texture(TextureTarget.Texture2D,
new NullImageFiller(MAX_FRAMEBUFFER_WIDTH, MAX_FRAMEBUFFER_HEIGHT, OpenGL.GL_R32UI, OpenGL.GL_RED_INTEGER, OpenGL.GL_UNSIGNED_BYTE),
new SamplerParameters(TextureWrapping.Repeat, TextureWrapping.Repeat, TextureWrapping.Repeat, TextureFilter.Nearest, TextureFilter.Nearest));
texture.Initialize();
this.headTexture = texture;
OpenGL.BindImageTexture(0, this.headTexture.Id, 0, true, 0, OpenGL.GL_READ_WRITE, OpenGL.GL_R32UI);
}
// Create buffer for clearing the head pointer texture
{
const int length = MAX_FRAMEBUFFER_WIDTH * MAX_FRAMEBUFFER_HEIGHT;
PixelUnpackBuffer buffer = PixelUnpackBuffer.Create(typeof(uint), length, BufferUsage.StaticDraw);
// NOTE: not all initial values are zero in this unmanged array.
// initialize buffer's value to 0.
//unsafe
//{
// IntPtr pointer = ptr.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (uint*)pointer.ToPointer();
// for (int i = 0; i < MAX_FRAMEBUFFER_WIDTH * MAX_FRAMEBUFFER_HEIGHT; i++)
// {
// array[i] = 0;
// }
//}
// another way to initialize buffer's value to 0.
//using (var data = new UnmanagedArray<uint>(1))
//{
// data[0] = 0;
// ptr.ClearBufferData(OpenGL.GL_UNSIGNED_INT, OpenGL.GL_RED, OpenGL.GL_UNSIGNED_INT, data);
//}
this.headClearBuffer = buffer;
}
// Create the atomic counter buffer
{
const int length = 1;
AtomicCounterBuffer buffer = AtomicCounterBuffer.Create(typeof(uint), length, BufferUsage.DynamicCopy);
// another way to do this:
//uint data = 1;
//AtomicCounterBuffer buffer = data.GenAtomicCounterBuffer(BufferUsage.DynamicCopy);
this.atomicCountBuffer = buffer;
}
// Bind it to a texture (for use as a TBO)
{
const int length = MAX_FRAMEBUFFER_WIDTH * MAX_FRAMEBUFFER_HEIGHT * 3;
TextureBuffer buffer = TextureBuffer.Create(typeof(vec4), length, BufferUsage.DynamicCopy);
Texture texture = buffer.DumpBufferTexture(OpenGL.GL_RGBA32UI, autoDispose: true);
texture.Initialize();
buffer.Dispose();// dispose it ASAP.
this.linkedListTexture = texture;
}
{
//TextureBuffer buffer = TextureBuffer.Create()
}
{
OpenGL.BindImageTexture(1, this.linkedListTexture.Id, 0, false, 0, OpenGL.GL_WRITE_ONLY, OpenGL.GL_RGBA32UI);
}
OpenGL.ClearDepth(1.0f);
}
