private void GetBufferData <T>(int offsetInBytes, T[] data, int startIndex, int elementCount) where T : struct
{
GL.BindBuffer(BufferTarget.ArrayBuffer, ibo);
REngine.CheckGLError();
var elementSizeInByte = Marshal.SizeOf(typeof(T));
IntPtr ptr = GL.MapBuffer(BufferTarget.ArrayBuffer, BufferAccess.ReadOnly);
// Pointer to the start of data to read in the index buffer
ptr = new IntPtr(ptr.ToInt64() + offsetInBytes);
if (typeof(T) == typeof(byte))
{
byte[] buffer = data as byte[];
// If data is already a byte[] we can skip the temporary buffer
// Copy from the index buffer to the destination array
Marshal.Copy(ptr, buffer, 0, buffer.Length);
}
else
{
// Temporary buffer to store the copied section of data
byte[] buffer = new byte[elementCount * elementSizeInByte];
// Copy from the index buffer to the temporary buffer
Marshal.Copy(ptr, buffer, 0, buffer.Length);
// Copy from the temporary buffer to the destination array
System.Buffer.BlockCopy(buffer, 0, data, startIndex * elementSizeInByte, elementCount * elementSizeInByte);
}
GL.UnmapBuffer(BufferTarget.ArrayBuffer);
REngine.CheckGLError();
}
private void BufferData <T>(int offsetInBytes, T[] data, int startIndex, int elementCount, RVertexDataOptions options) where T : struct
{
GenerateIfRequired();
var elementSizeInByte = Marshal.SizeOf(typeof(T));
var sizeInBytes = elementSizeInByte * elementCount;
var dataHandle = GCHandle.Alloc(data, GCHandleType.Pinned);
var dataPtr = (IntPtr)(dataHandle.AddrOfPinnedObject().ToInt64() + startIndex * elementSizeInByte);
var bufferSize = IndexCount * (IndexElementSize == RIndexElementSize.SixteenBits ? 2 : 4);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, ibo);
REngine.CheckGLError();
if (options == RVertexDataOptions.Discard)
{
// By assigning NULL data to the buffer this gives a hint
// to the device to discard the previous content.
GL.BufferData(BufferTarget.ElementArrayBuffer,
(IntPtr)bufferSize,
IntPtr.Zero,
_isDynamic ? BufferUsageHint.StreamDraw : BufferUsageHint.StaticDraw);
REngine.CheckGLError();
}
GL.BufferData(BufferTarget.ElementArrayBuffer, (IntPtr)bufferSize, dataPtr, _isDynamic ? BufferUsageHint.StreamDraw : BufferUsageHint.StaticDraw);
REngine.CheckGLError();
GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
REngine.CheckGLError();
dataHandle.Free();
}
private void Build(int width, int height, bool mipMap,
RSurfaceFormat preferredFormat, RDepthFormat preferredDepthFormat, int preferredMultiSampleCount, bool shared)
{
var depth = 0;
var stencil = 0;
BackBuffer = new RTexture2D();
BackBuffer.Create(width, height, RPixelFormat.Rgba, preferredFormat);
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, TextureTarget.Texture2D, BackBuffer.Id, 0);
if (preferredDepthFormat != RDepthFormat.None)
{
DepthBuffer = new RTexture2D();
if (preferredDepthFormat == RDepthFormat.Depth24Stencil8 || preferredDepthFormat == RDepthFormat.Depth32Stencil8)
{
DepthBuffer.CreateDepth(width, height, RPixelFormat.DepthStencil, preferredDepthFormat);
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthStencilAttachment, TextureTarget.Texture2D, DepthBuffer.Id, 0);
}
else
{
DepthBuffer.CreateDepth(width, height, RPixelFormat.DepthComponent, preferredDepthFormat);
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthAttachment, TextureTarget.Texture2D, DepthBuffer.Id, 0);
}
REngine.CheckGLError();
}
if (GL.CheckFramebufferStatus(FramebufferTarget.Framebuffer) != FramebufferErrorCode.FramebufferComplete)
{
throw new Exception("Error creating frame buffer: framebuffer is not complete");
}
}
internal void PlatformApplyState()
{
GL.Enable(EnableCap.Blend);
GL.BlendFunc(this.ColorSourceBlend.GetBlendFactor(), this.ColorDestinationBlend.GetBlendFactor());
GL.BlendColor(
this.BlendFactor.R / 255.0f,
this.BlendFactor.G / 255.0f,
this.BlendFactor.B / 255.0f,
this.BlendFactor.A / 255.0f);
REngine.CheckGLError();
GL.BlendEquationSeparate(
this.ColorBlendFunction.GetBlendEquationMode(),
this.AlphaBlendFunction.GetBlendEquationMode());
REngine.CheckGLError();
GL.BlendFuncSeparate(
this.ColorSourceBlend.GetBlendFactorSrc(),
this.ColorDestinationBlend.GetBlendFactorDest(),
this.AlphaSourceBlend.GetBlendFactorSrc(),
this.AlphaDestinationBlend.GetBlendFactorDest());
REngine.CheckGLError();
GL.ColorMask(
(this.ColorWriteChannels & RColorWriteChannels.Red) != 0,
(this.ColorWriteChannels & RColorWriteChannels.Green) != 0,
(this.ColorWriteChannels & RColorWriteChannels.Blue) != 0,
(this.ColorWriteChannels & RColorWriteChannels.Alpha) != 0);
REngine.CheckGLError();
}
internal void Draw(PrimitiveType primitiveType, Matrix world)
{
Threading.EnsureUIThread();
GL.FrontFace(FrontFaceDirection.Ccw);
GL.CullFace(CullFaceMode.Back);
GL.Enable(EnableCap.CullFace);
GL.Enable(EnableCap.DepthTest);
GL.DepthFunc(DepthFunction.Less);
Material.Shader.Bind();
Material.Apply();
VertexBuffer.BindVertexArray();
VertexBuffer.Bind();
IndexBuffer.Bind();
VertexBuffer.VertexDeclaration.Apply(Material.Shader, IntPtr.Zero);
REngine.CheckGLError();
Material.Shader.BindSemantics(Matrix.Identity * world, REngine.camera.View, REngine.camera.Projection);
REngine.CheckGLError();
GL.DrawElements(primitiveType, IndexBuffer.IndexCount, DrawElementsType.UnsignedInt, IntPtr.Zero);
Material.Shader.Unbind();
IndexBuffer.Unbind();
VertexBuffer.Unbind();
VertexBuffer.UnbindVertexArray();
}
private void SetBufferData <T>(int bufferSize, int elementSizeInBytes, int offsetInBytes, T[] data, int startIndex, int elementCount, int vertexStride, RVertexDataOptions options) where T : struct
{
GenerateIfRequired();
var sizeInBytes = elementSizeInBytes * elementCount;
GL.BindBuffer(BufferTarget.ArrayBuffer, vbo);
REngine.CheckGLError();
if (options == RVertexDataOptions.Discard)
{
// By assigning NULL data to the buffer this gives a hint
// to the device to discard the previous content.
GL.BufferData(BufferTarget.ArrayBuffer,
(IntPtr)bufferSize,
IntPtr.Zero,
_isDynamic ? BufferUsageHint.StreamDraw : BufferUsageHint.StaticDraw);
REngine.CheckGLError();
}
var dataHandle = GCHandle.Alloc(data, GCHandleType.Pinned);
var dataPtr = (IntPtr)(dataHandle.AddrOfPinnedObject().ToInt64() + startIndex * elementSizeInBytes);
GL.BufferSubData(BufferTarget.ArrayBuffer, (IntPtr)offsetInBytes, (IntPtr)sizeInBytes, dataPtr);
REngine.CheckGLError();
dataHandle.Free();
}
/// <summary>
/// Runs the given action on the UI thread and blocks the current thread while the action is running.
/// If the current thread is the UI thread, the action will run immediately.
/// </summary>
/// <param name="action">The action to be run on the UI thread</param>
internal static void BlockOnUIThread(Action action)
{
if (action == null)
{
throw new ArgumentNullException("action");
}
// If we are already on the UI thread, just call the action and be done with it
if (IsOnUIThread())
{
action();
return;
}
lock (BackgroundContext)
{
// Make the context current on this thread
BackgroundContext.MakeCurrent(WindowInfo);
// Execute the action
action();
// Must flush the GL calls so the texture is ready for the main context to use
GL.Flush();
REngine.CheckGLError();
// Must make the context not current on this thread or the next thread will get error 170 from the MakeCurrent call
BackgroundContext.MakeCurrent(null);
}
}
public void Dispose()
{
GL.DeleteFramebuffer(Id);
DepthBuffer.Dispose();
BackBuffer.Dispose();
REngine.CheckGLError();
}
public void Dispose()
{
Threading.BlockOnUIThread(() =>
{
GL.DeleteBuffers(1, ref ibo);
REngine.CheckGLError();
});
}
protected void CreateProperties(TextureTarget target, bool mipmapped = false)
{
textureTarget = target;
SetTextureMagFilter(RTextureMagFilter.Linear);
SetTextureMinFilter(mipmapped ? RTextureMinFilter.LinearMipmapLinear : RTextureMinFilter.Linear);
SetTextureWrapMode(RTextureWrapMode.Repeat, RTextureWrapMode.Repeat);
REngine.CheckGLError();
}
public void SetData(RColor[] colors, RPixelFormat format, int x, int y, int width, int height)
{
Bind();
GL.TexSubImage2D <RColor>(textureTarget, 0, x, y, width, height, (PixelFormat)format, PixelType.UnsignedByte, colors);
REngine.CheckGLError();
Unbind();
REngine.CheckGLError();
}
public void SetTextureMinFilter(RTextureMinFilter value)
{
if (Id != 0)
{
GL.TexParameter(textureTarget, TextureParameterName.TextureMinFilter, (int)value);
REngine.CheckGLError();
}
}
internal void LoadFromDisk(string filename)
{
if (Path.GetExtension(filename).ToLower() == ".dds")
{
try
{
ImageDDS.LoadFromDisk(RFileSystem.Instance.GetFilePath(filename), out Id, out textureTarget, out pixelFormat, out pixelType);
}catch (Exception e) {
RLog.Error("Error loading texture from: " + filename);
RLog.Error(e);
}
}
else
{
try
{
ImageGDI.LoadFromDisk(RFileSystem.Instance.GetFilePath(filename), out Id, out textureTarget, out pixelFormat, out pixelType);
}catch (Exception e) {
RLog.Error("Error loading texture from: " + filename);
RLog.Error(e);
return;
}
}
if (Id == 0 || textureTarget == 0)
{
RLog.Error("Error generating OpenGL texture from: " + filename);
return;
}
// load succeeded, Texture can be used.
Bind();
int max_level = 0;
int min_level = 0;
REngine.CheckGLError();
GL.TexParameterI(textureTarget, TextureParameterName.TextureBaseLevel, ref min_level);
REngine.CheckGLError();
GL.TexParameterI(textureTarget, TextureParameterName.TextureMaxLevel, ref max_level);
REngine.CheckGLError();
GL.TexParameter(textureTarget, TextureParameterName.TextureMagFilter, (int)RTextureMagFilter.Linear);
REngine.CheckGLError();
GL.TexParameter(textureTarget, TextureParameterName.TextureMinFilter, (int)RTextureMinFilter.Linear);
REngine.CheckGLError();
GL.TexParameter(textureTarget, TextureParameterName.TextureMaxLod, 0);
REngine.CheckGLError();
GL.TexParameter(textureTarget, TextureParameterName.TextureMinLod, 0);
REngine.CheckGLError();
int height, width;
GL.GetTexLevelParameter(textureTarget, 0, GetTextureParameter.TextureHeight, out height);
REngine.CheckGLError();
GL.GetTexLevelParameter(textureTarget, 0, GetTextureParameter.TextureWidth, out width);
REngine.CheckGLError();
Bounds = new Reactor.Math.Rectangle(0, 0, width, height);
RLog.Info("Texture loaded from: " + filename);
}
public void CreateDepth(int width, int height, RPixelFormat format, RDepthFormat depthFormat)
{
GL.GenTextures(1, out Id);
textureTarget = TextureTarget.Texture2D;
GL.BindTexture(textureTarget, Id);
REngine.CheckGLError();
GL.TexImage2D(textureTarget, 0, GetPixelInternalForDepth(depthFormat), width, height, 0, (PixelFormat)format, GetPixelTypeForDepth(depthFormat), IntPtr.Zero);
REngine.CheckGLError();
CreateProperties(textureTarget, false);
REngine.CheckGLError();
}
public void SetUniformValue(string name, bool value)
{
if (value)
{
GL.Uniform1(GetUniformLocation(name), 1);
}
else
{
GL.Uniform1(GetUniformLocation(name), 0);
}
REngine.CheckGLError();
}
public void Dispose()
{
if (!IsDisposed)
{
Threading.BlockOnUIThread(() =>
{
GL.DeleteBuffers(1, ref vbo);
REngine.CheckGLError();
});
}
IsDisposed = true;
}
public void UnbindVertexArray()
{
if (!Threading.IsOnUIThread())
{
Threading.BlockOnUIThread(() => { UnbindVertexArray(); });
}
else
{
GL.BindVertexArray(0);
REngine.CheckGLError();
}
}
public void Bind()
{
if (Id != 0)
{
GL.UseProgram(Id);
REngine.CheckGLError();
}
else
{
throw new EngineGLException("You must first compile a shader program before you can bind it");
}
}
public void Dispose()
{
try
{
if (GL.IsShader(Id))
{
GL.DeleteShader(Id);
REngine.CheckGLError();
}
}
catch { }
}
public void Unbind()
{
if (Threading.IsOnUIThread())
{
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
REngine.CheckGLError();
}
else
{
Threading.BlockOnUIThread(() => { Unbind(); });
}
}
private void GetBufferData <T>(int offsetInBytes, T[] data, int startIndex, int elementCount, int vertexStride) where T : struct
{
GL.BindBuffer(BufferTarget.ArrayBuffer, vbo);
REngine.CheckGLError();
var elementSizeInByte = Marshal.SizeOf(typeof(T));
IntPtr ptr = GL.MapBuffer(BufferTarget.ArrayBuffer, BufferAccess.ReadOnly);
REngine.CheckGLError();
// Pointer to the start of data to read in the index buffer
ptr = new IntPtr(ptr.ToInt64() + offsetInBytes);
if (typeof(T) == typeof(byte))
{
byte[] buffer = data as byte[];
// If data is already a byte[] we can skip the temporary buffer
// Copy from the vertex buffer to the destination array
Marshal.Copy(ptr, buffer, 0, buffer.Length);
}
else
{
// Temporary buffer to store the copied section of data
byte[] buffer = new byte[elementCount * vertexStride - offsetInBytes];
// Copy from the vertex buffer to the temporary buffer
Marshal.Copy(ptr, buffer, 0, buffer.Length);
var dataHandle = GCHandle.Alloc(data, GCHandleType.Pinned);
var dataPtr = (IntPtr)(dataHandle.AddrOfPinnedObject().ToInt64() + startIndex * elementSizeInByte);
// Copy from the temporary buffer to the destination array
int dataSize = Marshal.SizeOf(typeof(T));
if (dataSize == vertexStride)
{
Marshal.Copy(buffer, 0, dataPtr, buffer.Length);
}
else
{
// If the user is asking for a specific element within the vertex buffer, copy them one by one...
for (int i = 0; i < elementCount; i++)
{
Marshal.Copy(buffer, i * vertexStride, dataPtr, dataSize);
dataPtr = (IntPtr)(dataPtr.ToInt64() + dataSize);
}
}
dataHandle.Free();
//Buffer.BlockCopy(buffer, 0, data, startIndex * elementSizeInByte, elementCount * elementSizeInByte);
}
GL.UnmapBuffer(BufferTarget.ArrayBuffer);
REngine.CheckGLError();
}
public void BindVertexArray()
{
if (!Threading.IsOnUIThread())
{
Threading.BlockOnUIThread(() => { BindVertexArray(); });
}
else
{
GenerateIfRequired();
REngine.CheckGLError();
GL.BindVertexArray(vao);
REngine.CheckGLError();
}
}
public T[] GetData <T>() where T : struct
{
GL.ActiveTexture(TextureUnit.Texture0);
REngine.CheckGLError();
Bind();
REngine.CheckGLError();
T[] pixels = new T[Bounds.Width * Bounds.Height];
GL.GetTexImage <T>(textureTarget, 0, (PixelFormat)pixelFormat, pixelType, pixels);
REngine.CheckGLError();
Unbind();
REngine.CheckGLError();
return(pixels);
}
public void SetSamplerValue(RTextureLayer layer, RTexture texture)
{
int unival = GetTexUniformValue(layer);
int loc = GetTexUniformLocation(layer);
GL.Uniform1(loc, unival);
REngine.CheckGLError();
TextureUnit unit = (TextureUnit)(int)layer;
GL.ActiveTexture(unit);
REngine.CheckGLError();
texture.Bind();
REngine.CheckGLError();
}
internal void Render(ref RShader shader, ref RVertexBuffer vertexBuffer, ref RIndexBuffer indexBuffer, string text, Vector2 location, RColor color, Matrix matrix)
{
Vector2 pen = location;
pen.Y += MeasureString(text).Height;
float x = pen.X;
List <RVertexData2D> quads = new List <RVertexData2D>();
foreach (char c in text)
{
if (c == '\r')
{
continue;
}
if (c == '\n')
{
pen.X = x;
pen.Y += LineHeight;
continue;
}
if (c == ' ')
{
pen.X += SpaceWidth;
continue;
}
if (c == '\t')
{
pen.X += (SpaceWidth * 3);
continue;
}
RFontGlyph glyph = GetGlyphForChar(c);
var dest = new Reactor.Math.Rectangle();
dest.X = (int)(pen.X + glyph.Offset.X);
dest.Y = (int)pen.Y - ((int)glyph.Offset.Y);
dest.Width = glyph.Bounds.Width;
dest.Height = glyph.Bounds.Height;
vertexBuffer.SetData <RVertexData2D>(AddQuads(dest, glyph.UVBounds));
vertexBuffer.Bind();
vertexBuffer.BindVertexArray();
indexBuffer.Bind();
vertexBuffer.VertexDeclaration.Apply(shader, IntPtr.Zero);
GL.DrawElements(PrimitiveType.Triangles, indexBuffer.IndexCount, DrawElementsType.UnsignedShort, IntPtr.Zero);
REngine.CheckGLError();
indexBuffer.Unbind();
vertexBuffer.Unbind();
vertexBuffer.UnbindVertexArray();
pen.X += glyph.Advance;
}
}
public void SetData <T>(T[] data, RPixelFormat format, int x, int y, int width, int height, bool packAlignment = true) where T : struct
{
if (!packAlignment)
{
GL.PixelStore(PixelStoreParameter.UnpackAlignment, 1);
}
Bind();
GL.TexSubImage2D <T>(textureTarget, 0, x, y, width, height, (PixelFormat)format, PixelType.UnsignedByte, data);
REngine.CheckGLError();
Unbind();
if (!packAlignment)
{
GL.PixelStore(PixelStoreParameter.PackAlignment, 1);
}
}
/// <summary>
/// If the IBO does not exist, create it.
/// </summary>
void GenerateIfRequired()
{
if (ibo == 0)
{
var sizeInBytes = IndexCount * (this.IndexElementSize == RIndexElementSize.SixteenBits ? 2 : 4);
GL.GenBuffers(1, out ibo);
REngine.CheckGLError();
GL.BindBuffer(BufferTarget.ElementArrayBuffer, ibo);
REngine.CheckGLError();
GL.BufferData(BufferTarget.ElementArrayBuffer,
(IntPtr)sizeInBytes, IntPtr.Zero, _isDynamic ? BufferUsageHint.StreamDraw : BufferUsageHint.StaticDraw);
REngine.CheckGLError();
}
}
public void SetTextureWrapMode(RTextureWrapMode modeS, RTextureWrapMode modeT)
{
if (Id != 0)
{
Bind();
try
{
GL.TexParameter(textureTarget, TextureParameterName.TextureWrapS, (int)modeS);
REngine.CheckGLError();
GL.TexParameter(textureTarget, TextureParameterName.TextureWrapT, (int)modeT);
REngine.CheckGLError();
}catch (EngineGLException ex)
{
}
}
}
public RFrameBuffer(int width, int height, bool mipMap, RSurfaceFormat preferredFormat, RDepthFormat preferredDepthFormat, int preferredMultiSampleCount, bool shared)
{
Width = width;
Height = height;
DepthStencilFormat = preferredDepthFormat;
SurfaceFormat = preferredFormat;
MultiSampleCount = preferredMultiSampleCount;
var id = 0;
GL.GenFramebuffers(1, out id);
REngine.CheckGLError();
Id = id;
Bind();
Build(width, height, mipMap, preferredFormat, preferredDepthFormat, preferredMultiSampleCount, shared);
Unbind();
}
internal void Apply(RShader shader, IntPtr offset)
{
RVertexDeclarationAttributeInfo attrInfo;
int shaderHash = shader.GetHashCode();
if (!shaderAttributeInfo.TryGetValue(shaderHash, out attrInfo))
{
// Get the vertex attribute info and cache it
attrInfo = new RVertexDeclarationAttributeInfo(16);
foreach (var ve in _elements)
{
var attributeLocation = shader.GetAttribLocation(ve.VertexElementUsage);
if (attributeLocation >= 0)
{
attrInfo.Elements.Add(new RVertexDeclarationAttributeInfo.Element()
{
Offset = ve.Offset,
AttributeLocation = attributeLocation,
NumberOfElements = RVertexElement.OpenGLNumberOfElements(ve.VertexElementFormat),
VertexAttribPointerType = RVertexElement.OpenGLVertexAttribPointerType(ve.VertexElementFormat),
Normalized = RVertexElement.OpenGLVertexAttribNormalized(ve),
});
attrInfo.EnabledAttributes[attributeLocation] = true;
}
}
shaderAttributeInfo.Add(shaderHash, attrInfo);
}
// Apply the vertex attribute info
foreach (var element in attrInfo.Elements)
{
GL.EnableVertexAttribArray(element.AttributeLocation);
REngine.CheckGLError();
GL.VertexAttribPointer(element.AttributeLocation,
element.NumberOfElements,
element.VertexAttribPointerType,
element.Normalized,
this.VertexStride,
(IntPtr)(offset.ToInt64() + element.Offset));
REngine.CheckGLError();
}
//GraphicsDevice.SetVertexAttributeArray(attrInfo.EnabledAttributes);
}
