/// <summary>
/// Fill a buffer object's data store with a fixed value.
/// </summary>
/// <param name="internalFormat">The sized internal format with which the data will be stored in the buffer object.</param>
/// <param name="format">Specifies the format of the pixel data. For transfers of depth, stencil, or depth/stencil data, you must use GL_DEPTH_COMPONENT, GL_STENCIL_INDEX, or GL_DEPTH_STENCIL, where appropriate. For transfers of normalized integer or floating-point color image data, you must use one of the following: GL_RED, GL_GREEN, GL_BLUE, GL_RG, GL_RGB, GL_BGR, GL_RGBA, and GL_BGRA. For transfers of non-normalized integer data, you must use one of the following: GL_RED_INTEGER, GL_GREEN_INTEGER, GL_BLUE_INTEGER, GL_RG_INTEGER, GL_RGB_INTEGER, GL_BGR_INTEGER, GL_RGBA_INTEGER, and GL_BGRA_INTEGER.</param>
/// <param name="type">Specifies the data type of the pixel data. The following symbolic values are accepted: GL_UNSIGNED_BYTE, GL_BYTE, GL_UNSIGNED_SHORT, GL_SHORT, GL_UNSIGNED_INT, GL_INT, GL_FLOAT, GL_UNSIGNED_BYTE_3_3_2, GL_UNSIGNED_BYTE_2_3_3_REV, GL_UNSIGNED_SHORT_5_6_5, GL_UNSIGNED_SHORT_5_6_5_REV, GL_UNSIGNED_SHORT_4_4_4_4, GL_UNSIGNED_SHORT_4_4_4_4_REV, GL_UNSIGNED_SHORT_5_5_5_1, GL_UNSIGNED_SHORT_1_5_5_5_REV, GL_UNSIGNED_INT_8_8_8_8, GL_UNSIGNED_INT_8_8_8_8_REV, GL_UNSIGNED_INT_10_10_10_2, and GL_UNSIGNED_INT_2_10_10_10_REV.</param>
/// <param name="data">Specifies a pointer to a single pixel of data to upload. This parameter may not be null.</param>
/// <param name="autoBind">Automatically call glBindBuffer() inside this method.</param>
/// <returns></returns>
public bool ClearBufferData(uint internalFormat, uint format, uint type, UnmanagedArrayBase data, bool autoBind = true)
{
if (data == null || data.Header == IntPtr.Zero)
{
throw new ArgumentNullException("data");
}
return(ClearBufferData(internalFormat, format, type, data.Header, autoBind));
}
/// <summary>
/// 获取顶点属性Buffer。描述顶点的位置或颜色或UV等各种属性。
/// <para>每个<see cref="VertexBuffer"/>仅描述其中一个属性。</para>
/// <para>Vertex Buffer Object that describes vertex' property(position, color, uv coordinate, etc.).</para>
/// <para>Each <see cref="VertexBuffer"/> describes only 1 property.</para>
/// </summary>
/// <param name="array"></param>
/// <param name="config">This <paramref name="config"/> decides parameters' values in glVertexAttribPointer(attributeLocation, size, type, false, 0, IntPtr.Zero);</param>
/// <param name="varNameInVertexShader">此顶点属性VBO对应于vertex shader中的哪个in变量？<para>Mapping variable's name in vertex shader.</para></param>
/// <param name="usage"></param>
/// <param name="instancedDivisor">0: not instanced. 1: instanced divisor is 1.</param>
/// <param name="patchVertexes">How many vertexes makes a patch? No patch if <paramref name="patchVertexes"/> is 0.</param>
/// <returns></returns>
public static VertexBuffer GenVertexBuffer <T>(this T[] array, VBOConfig config, string varNameInVertexShader, BufferUsage usage, uint instancedDivisor = 0, int patchVertexes = 0) where T : struct
{
GCHandle pinned = GCHandle.Alloc(array, GCHandleType.Pinned);
IntPtr header = Marshal.UnsafeAddrOfPinnedArrayElement(array, 0);
UnmanagedArrayBase unmanagedArray = UnmanagedArray <T> .FromHandle(header, array.Length);// It's not neecessary to call Dispose() for this unmanaged array.
VertexBuffer buffer = GenVertexBuffer(unmanagedArray, config, varNameInVertexShader, usage, instancedDivisor, patchVertexes);
pinned.Free();
return(buffer);
}
/// <summary>
/// Generates an independent buffer.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="array"></param>
/// <param name="target"></param>
/// <param name="usage"></param>
/// <returns></returns>
private static Buffer GenIndependentBuffer <T>(this T[] array, IndependentBufferTarget target, BufferUsage usage) where T : struct
{
GCHandle pinned = GCHandle.Alloc(array, GCHandleType.Pinned);
IntPtr header = Marshal.UnsafeAddrOfPinnedArrayElement(array, 0);
UnmanagedArrayBase unmanagedArray = UnmanagedArray <T> .FromHandle(header, array.Length);// It's not neecessary to call Dispose() for this unmanaged array.
Buffer buffer = GenIndependentBuffer(unmanagedArray, target, usage);
pinned.Free();
return(buffer);
}
/// <summary>
/// 获取此VBO的内存首地址。用于快速读写。
/// </summary>
/// <returns></returns>
public unsafe void *FirstElement()
{
UnmanagedArrayBase array = this.array;
if (array == null)
{
return((void *)0);
}
else
{
return(array.FirstElement());
}
}
/// <summary>
/// Fill all or part of buffer object's data store with a fixed value.
/// </summary>
/// <param name="offset">The offset, in basic machine units into the buffer object's data store at which to start filling.</param>
/// <param name="size">The size, in basic machine units of the range of the data store to fill.</param>
/// <param name="data">Specifies a pointer to a single pixel of data to upload. This parameter may not be null.</param>
/// <param name="autoBind">Automatically call glBindBuffer() inside this method.</param>
/// <returns></returns>
public bool ClearBufferSubData(int offset, uint size, vec3 data, bool autoBind = true)
{
var array = new vec3[] { data };
GCHandle pin = GCHandle.Alloc(array, GCHandleType.Pinned);
IntPtr header = Marshal.UnsafeAddrOfPinnedArrayElement(array, 0);
UnmanagedArrayBase unmanagedArray = UnmanagedArray <vec3> .FromHandle(header, 1);
bool result = ClearBufferSubData(OpenGL.GL_RGB32F, new IntPtr(offset), size, OpenGL.GL_RGB, OpenGL.GL_FLOAT, unmanagedArray, autoBind);
pin.Free();
return(result);
}
///// <summary>
///// Generates an atomic counter buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static AtomicCounterBuffer GenAtomicCounterBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.AtomicCounterBuffer, usage) as AtomicCounterBuffer;
//}
///// <summary>
///// Generates a pixel pack buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static PixelPackBuffer GenPixelPackBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.PixelPackBuffer, usage) as PixelPackBuffer;
//}
///// <summary>
///// Generates a pixel unpack buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static PixelUnpackBuffer GenPixelUnpackBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.PixelUnpackBuffer, usage) as PixelUnpackBuffer;
//}
///// <summary>
///// Generates a shader storage buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static ShaderStorageBuffer GenShaderStorageBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.ShaderStorageBuffer, usage) as ShaderStorageBuffer;
//}
///// <summary>
///// Generates a texture buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static TextureBuffer GenTextureBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.TextureBuffer, usage) as TextureBuffer;
//}
///// <summary>
///// Generates an uniform buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static UniformBuffer GenUniformBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.UniformBuffer, usage) as UniformBuffer;
//}
/// <summary>
/// Generates an independent buffer.
/// </summary>
/// <param name="array"></param>
/// <param name="bufferTarget"></param>
/// <param name="usage"></param>
/// <returns></returns>
private static GLBuffer GenIndependentBuffer(this UnmanagedArrayBase array, IndependentBufferTarget bufferTarget, BufferUsage usage)
{
if (glGenBuffers == null)
{
InitFunctions();
}
uint[] buffers = new uint[1];
glGenBuffers(1, buffers);
var target = (uint)bufferTarget;
glBindBuffer(target, buffers[0]);
glBufferData(target, array.ByteLength, array.Header, (uint)usage);
glBindBuffer(target, 0);
GLBuffer buffer = null;
switch (bufferTarget)
{
case IndependentBufferTarget.AtomicCounterBuffer:
buffer = new AtomicCounterBuffer(buffers[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.PixelPackBuffer:
buffer = new PixelPackBuffer(buffers[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.PixelUnpackBuffer:
buffer = new PixelUnpackBuffer(buffers[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.ShaderStorageBuffer:
buffer = new ShaderStorageBuffer(buffers[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.TextureBuffer:
buffer = new TextureBuffer(buffers[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.UniformBuffer:
buffer = new UniformBuffer(buffers[0], array.Length, array.ByteLength);
break;
default:
throw new NotImplementedException();
}
return(buffer);
}
///// <summary>
///// Generates an atomic counter buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static AtomicCounterBuffer GenAtomicCounterBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.AtomicCounterBuffer, usage) as AtomicCounterBuffer;
//}
///// <summary>
///// Generates a pixel pack buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static PixelPackBuffer GenPixelPackBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.PixelPackBuffer, usage) as PixelPackBuffer;
//}
///// <summary>
///// Generates a pixel unpack buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static PixelUnpackBuffer GenPixelUnpackBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.PixelUnpackBuffer, usage) as PixelUnpackBuffer;
//}
///// <summary>
///// Generates a shader storage buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static ShaderStorageBuffer GenShaderStorageBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.ShaderStorageBuffer, usage) as ShaderStorageBuffer;
//}
///// <summary>
///// Generates a texture buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static TextureBuffer GenTextureBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.TextureBuffer, usage) as TextureBuffer;
//}
///// <summary>
///// Generates an uniform buffer.
///// </summary>
///// <param name="array"></param>
///// <param name="usage"></param>
///// <returns></returns>
//public static UniformBuffer GenUniformBuffer(this UnmanagedArrayBase array, BufferUsage usage)
//{
// return GenIndependentBuffer(array, IndependentBufferTarget.UniformBuffer, usage) as UniformBuffer;
//}
/// <summary>
/// Generates an independent buffer.
/// </summary>
/// <param name="array"></param>
/// <param name="bufferTarget"></param>
/// <param name="usage"></param>
/// <returns></returns>
private static GLBuffer GenIndependentBuffer(this UnmanagedArrayBase array, IndependentBufferTarget bufferTarget, BufferUsage usage)
{
uint[] ids = new uint[1];
{
glGenBuffers(1, ids);
var target = (uint)bufferTarget;
glBindBuffer(target, ids[0]);
glBufferData(target, array.ByteLength, array.Header, (uint)usage);
glBindBuffer(target, 0);
}
GLBuffer buffer = null;
switch (bufferTarget)
{
case IndependentBufferTarget.AtomicCounterBuffer:
buffer = new AtomicCounterBuffer(ids[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.PixelPackBuffer:
buffer = new PixelPackBuffer(ids[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.PixelUnpackBuffer:
buffer = new PixelUnpackBuffer(ids[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.ShaderStorageBuffer:
buffer = new ShaderStorageBuffer(ids[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.TextureBuffer:
buffer = new TextureBuffer(ids[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.UniformBuffer:
buffer = new UniformBuffer(ids[0], array.Length, array.ByteLength);
break;
case IndependentBufferTarget.TransformFeedbackBuffer:
buffer = new TransformFeedbackBuffer(ids[0], array.Length, array.ByteLength);
break;
default:
throw new NotDealWithNewEnumItemException(typeof(IndependentBufferTarget));
}
return(buffer);
}
/// <summary>
/// 生成顶点属性Buffer。描述顶点的位置或颜色或UV等各种属性。
/// <para>每个<see cref="VertexBuffer"/>仅描述其中一个属性。</para>
/// <para>Vertex Buffer Object that describes vertex' property(position, color, uv coordinate, etc.).</para>
/// <para>Each <see cref="VertexBuffer"/> describes only 1 property.</para>
/// </summary>
/// <param name="array"></param>
/// <param name="config">This <paramref name="config"/> decides parameters' values in glVertexAttribPointer(attributeLocation, size, type, false, 0, IntPtr.Zero);</param>
/// <param name="varNameInVertexShader">此顶点属性VBO对应于vertex shader中的哪个in变量？<para>Mapping variable's name in vertex shader.</para></param>
/// <param name="usage"></param>
/// <param name="instancedDivisor">0: not instanced. 1: instanced divisor is 1.</param>
/// <param name="patchVertexes">How many vertexes makes a patch? No patch if <paramref name="patchVertexes"/> is 0.</param>
/// <returns></returns>
public static VertexBuffer GenVertexBuffer(this UnmanagedArrayBase array, VBOConfig config, string varNameInVertexShader, BufferUsage usage, uint instancedDivisor = 0, int patchVertexes = 0)
{
uint[] buffers = new uint[1];
glGenBuffers(1, buffers);
const uint target = OpenGL.GL_ARRAY_BUFFER;
glBindBuffer(target, buffers[0]);
glBufferData(target, array.ByteLength, array.Header, (uint)usage);
glBindBuffer(target, 0);
var buffer = new VertexBuffer(
buffers[0], config, array.Length, array.ByteLength, instancedDivisor, patchVertexes);
return(buffer);
}
/// <summary>
/// 生成一个用于存储索引的IBO。索引指定了<see cref="VertexBuffer"/>里各个顶点的渲染顺序。
/// Generates a Index Buffer Object storing vertexes' indexes, which indicate the rendering order of each vertex.
/// </summary>
/// <param name="array"></param>
/// <param name="type"></param>
/// <param name="usage"></param>
/// <returns></returns>
public static IndexBuffer GenIndexBuffer(this UnmanagedArrayBase array, IndexBufferElementType type, BufferUsage usage)
{
var ids = new uint[1];
{
glGenBuffers(1, ids);
const uint target = GL.GL_ELEMENT_ARRAY_BUFFER;
glBindBuffer(target, ids[0]);
glBufferData(target, array.ByteLength, array.Header, (uint)usage);
glBindBuffer(target, 0);
}
var buffer = new IndexBuffer(ids[0], type, array.ByteLength);
return(buffer);
}
/// <summary>
/// 生成一个用于存储索引的VBO。索引指定了<see cref="VertexBuffer"/>里各个顶点的渲染顺序。
/// Generates a Vertex Buffer Object storing vertexes' indexes, which indicate the rendering order of each vertex.
/// </summary>
/// <param name="array"></param>
/// <param name="mode">用哪种方式渲染各个顶点？（OpenGL.GL_TRIANGLES etc.）</param>
/// <param name="usage"></param>
/// <param name="primCount">primCount in instanced rendering.</param>
/// <returns></returns>
private static OneIndexBuffer GenIndexBuffer <T>(this T[] array, DrawMode mode, BufferUsage usage, int primCount = 1) where T : struct
{
IndexBufferElementType elementType;
if (typeof(T) == typeof(uint))
{
elementType = IndexBufferElementType.UInt;
}
else if (typeof(T) == typeof(ushort))
{
elementType = IndexBufferElementType.UShort;
}
else if (typeof(T) == typeof(byte))
{
elementType = IndexBufferElementType.UByte;
}
else
{
throw new ArgumentException(string.Format("Only uint/ushort/byte are allowed!"));
}
if (glGenBuffers == null)
{
InitFunctions();
}
GCHandle pinned = GCHandle.Alloc(array, GCHandleType.Pinned);
IntPtr header = Marshal.UnsafeAddrOfPinnedArrayElement(array, 0);
UnmanagedArrayBase unmanagedArray = UnmanagedArray <T> .FromHandle(header, array.Length);// It's not neecessary to call Dispose() for this unmanaged array.
var buffers = new uint[1];
{
glGenBuffers(1, buffers);
const uint target = OpenGL.GL_ELEMENT_ARRAY_BUFFER;
glBindBuffer(target, buffers[0]);
glBufferData(target, unmanagedArray.ByteLength, unmanagedArray.Header, (uint)usage);
glBindBuffer(target, 0);
}
pinned.Free();
var buffer = new OneIndexBuffer(buffers[0], mode, elementType, unmanagedArray.Length, unmanagedArray.ByteLength, primCount);
return(buffer);
}
/// <summary>
/// 生成顶点属性Buffer。描述顶点的位置或颜色或UV等各种属性。
/// <para>每个<see cref="VertexBuffer"/>仅描述其中一个属性。</para>
/// <para>Vertex Buffer Object that describes vertex' property(position, color, uv coordinate, etc.).</para>
/// <para>Each <see cref="VertexBuffer"/> describes only 1 property.</para>
/// </summary>
/// <param name="array"></param>
/// <param name="config">This <paramref name="config"/> decides parameters' values in glVertexAttribPointer(attributeLocation, size, type, false, 0, IntPtr.Zero);</param>
/// <param name="usage"></param>
/// <param name="instancedDivisor">0: not instanced. 1: instanced divisor is 1.</param>
/// <param name="patchVertexes">How many vertexes makes a patch? No patch if <paramref name="patchVertexes"/> is 0.</param>
/// <returns></returns>
public static VertexBuffer GenVertexBuffer(this UnmanagedArrayBase array, VBOConfig config, BufferUsage usage, uint instancedDivisor = 0, int patchVertexes = 0)
{
var ids = new uint[1];
{
glGenBuffers(1, ids);
const uint target = GL.GL_ARRAY_BUFFER;
glBindBuffer(target, ids[0]);
glBufferData(target, array.ByteLength, array.Header, (uint)usage);
glBindBuffer(target, 0);
}
var buffer = new VertexBuffer(
ids[0], config, array.Length, array.ByteLength,
instancedDivisor, patchVertexes);
return(buffer);
}
private void Dispose(bool disposing)
{
if (this.disposedValue == false)
{
if (disposing)
{
// Dispose managed resources.
}
// Dispose unmanaged resources.
UnmanagedArrayBase array = this.array;
this.array = null;
if (array != null)
{
array.Dispose();
}
}
this.disposedValue = true;
}
/// <summary>
/// 设置当前VBO的数据。
/// </summary>
/// <param name="target"></param>
/// <param name="data"></param>
/// <param name="usage"></param>
public static void BufferData(BufferTarget target, UnmanagedArrayBase data, BufferUsage usage)
{
GetDelegateFor<glBufferData>()((uint)target, data.ByteLength, data.Header, (uint)usage);
}
/// <summary>
/// Return a texture image.
/// </summary>
/// <param name="target">Specifies which texture is to be obtained. OpenGL.TEXTURE_1D and OpenGL.TEXTURE_2D are accepted.</param>
/// <param name="level">Specifies the level-of-detail number of the desired image. Level 0 is the base image level. Level n is the nth mipmap reduction image.</param>
/// <param name="format">Specifies a pixel format for the returned data.</param>
/// <param name="type">Specifies a pixel type for the returned data.</param>
/// <param name="pixels">Returns the texture image. Should be a pointer to an array of the type specified by type.</param>
public static void GetTexImage(GetTexImageTargets target, int level, GetTexImageFormats format, GetTexImageTypes type, UnmanagedArrayBase pixels)
{
GL.GetTexImage((uint)target, level, (uint)format, (uint)type, pixels.Header);
}
/// <summary>
/// 生成顶点属性Buffer。描述顶点的位置或颜色或UV等各种属性。
/// <para>每个<see cref="VertexBuffer"/>仅描述其中一个属性。</para>
/// <para>Vertex Buffer Object that describes vertex' property(position, color, uv coordinate, etc.).</para>
/// <para>Each <see cref="VertexBuffer"/> describes only 1 property.</para>
/// </summary>
/// <param name="array"></param>
/// <param name="config">This <paramref name="config"/> decides parameters' values in glVertexAttribPointer(attributeLocation, size, type, false, 0, IntPtr.Zero);</param>
/// <param name="varNameInVertexShader">此顶点属性VBO对应于vertex shader中的哪个in变量？<para>Mapping variable's name in vertex shader.</para></param>
/// <param name="usage"></param>
/// <param name="instancedDivisor">0: not instanced. 1: instanced divisor is 1.</param>
/// <param name="patchVertexes">How many vertexes makes a patch? No patch if <paramref name="patchVertexes"/> is 0.</param>
/// <returns></returns>
public static VertexBuffer GenVertexBuffer(this UnmanagedArrayBase array, VBOConfig config, string varNameInVertexShader, BufferUsage usage, uint instancedDivisor = 0, int patchVertexes = 0)
{
return(GenVertexBuffer(array.Header, array.Length, array.ByteLength, config, varNameInVertexShader, usage, instancedDivisor, patchVertexes));
}
/// <summary>
/// 设置当前VBO的数据。
/// </summary>
/// <param name="target"></param>
/// <param name="data"></param>
/// <param name="usage"></param>
public static void BufferData(BufferTarget target, UnmanagedArrayBase data, BufferUsage usage)
{
GetDelegateFor <glBufferData>()((uint)target, data.ByteLength, data.Header, (uint)usage);
}
/// <summary>
/// Fill a buffer object's data store with a fixed value.
/// </summary>
/// <param name="internalFormat">The sized internal format with which the data will be stored in the buffer object.</param>
/// <param name="format">Specifies the format of the pixel data. For transfers of depth, stencil, or depth/stencil data, you must use GL_DEPTH_COMPONENT, GL_STENCIL_INDEX, or GL_DEPTH_STENCIL, where appropriate. For transfers of normalized integer or floating-point color image data, you must use one of the following: GL_RED, GL_GREEN, GL_BLUE, GL_RG, GL_RGB, GL_BGR, GL_RGBA, and GL_BGRA. For transfers of non-normalized integer data, you must use one of the following: GL_RED_INTEGER, GL_GREEN_INTEGER, GL_BLUE_INTEGER, GL_RG_INTEGER, GL_RGB_INTEGER, GL_BGR_INTEGER, GL_RGBA_INTEGER, and GL_BGRA_INTEGER.</param>
/// <param name="type">Specifies the data type of the pixel data. The following symbolic values are accepted: GL_UNSIGNED_BYTE, GL_BYTE, GL_UNSIGNED_SHORT, GL_SHORT, GL_UNSIGNED_INT, GL_INT, GL_FLOAT, GL_UNSIGNED_BYTE_3_3_2, GL_UNSIGNED_BYTE_2_3_3_REV, GL_UNSIGNED_SHORT_5_6_5, GL_UNSIGNED_SHORT_5_6_5_REV, GL_UNSIGNED_SHORT_4_4_4_4, GL_UNSIGNED_SHORT_4_4_4_4_REV, GL_UNSIGNED_SHORT_5_5_5_1, GL_UNSIGNED_SHORT_1_5_5_5_REV, GL_UNSIGNED_INT_8_8_8_8, GL_UNSIGNED_INT_8_8_8_8_REV, GL_UNSIGNED_INT_10_10_10_2, and GL_UNSIGNED_INT_2_10_10_10_REV.</param>
/// <param name="data">Specifies a pointer to a single pixel of data to upload. This parameter may not be null.</param>
/// <param name="autoBind">Automatically call glBindBuffer() inside this method.</param>
/// <returns></returns>
public bool ClearBufferData(uint internalFormat, uint format, uint type, UnmanagedArrayBase data, bool autoBind = true)
{
if (data == null || data.Header == IntPtr.Zero) { throw new ArgumentNullException("data"); }
return ClearBufferData(internalFormat, format, type, data.Header, autoBind);
}
/// <summary>
/// 申请指定长度的非托管数组。
/// </summary>
/// <param name="elementCount">数组元素的数目。</param>
public void Alloc(int elementCount)
{
this.array = CreateElements(elementCount);
}
/// <summary>
/// Return a texture image.
/// </summary>
/// <param name="target">Specifies which texture is to be obtained. OpenGL.TEXTURE_1D and OpenGL.TEXTURE_2D are accepted.</param>
/// <param name="level">Specifies the level-of-detail number of the desired image. Level 0 is the base image level. Level n is the nth mipmap reduction image.</param>
/// <param name="format">Specifies a pixel format for the returned data.</param>
/// <param name="type">Specifies a pixel type for the returned data.</param>
/// <param name="pixels">Returns the texture image. Should be a pointer to an array of the type specified by type.</param>
public static void GetTexImage(GetTexImageTargets target, int level, GetTexImageFormats format, GetTexImageTypes type, UnmanagedArrayBase pixels)
{
GL.GetTexImage((uint)target, level, (uint)format, (uint)type, pixels.Header);
}
/// <summary>
/// 把此非托管数组复制到目标内存地址上。
/// </summary>
/// <param name="source"></param>
/// <param name="destination">例如用glMapBuffer()得到的地址。</param>
public static void CopyTo(this UnmanagedArrayBase source, IntPtr destination)
{
CopyMemory(destination, source.Header, (uint)source.ByteLength);
}