private void WorkerMain()
{
if (!Initialized)
{
throw new InvalidOperationException("The OpenGL Library bindings are not initialized.");
}
if (TargetWindow == null)
{
CreateMainWindow(WindowTitle);
}
_systemTimer.Start();
TargetWindow.MakeCurrent();
ViewportSize = new Size(TargetWindow.ClientSize.X, TargetWindow.ClientSize.Y);
if (WireframeMode)
{
WireframeMode = true; // Recall
}
if (AutoSetViewport)
{
Gl.Viewport(0, 0, ViewportSize.Width, ViewportSize.Height);
}
if (VerticalSync)
{
TargetWindow.SwapInterval = 1;
}
else
{
TargetWindow.SwapInterval = 0;
}
if (AutoEnableCaps.HasFlag(AutoEnableCapabilitiesFlags.Blend))
{
Gl.Enable(EnableCap.Blend);
}
OnContextCreated();
_lastFrameTimeValue = 0;
_timeSinceLastFrame = 0;
_frameIndex = 0;
_currFrameTimerValue = _lastFrameTimeValue;
if (Asynchronous)
{
while (!TargetWindow.IsExiting && !AbortFlag)
{
AdvanceFrame();
}
AbortFlag = true;
}
}
public void SetUniform(string name, float v1, float?v2 = null, float?v3 = null, float?v4 = null)
{
if (ActiveShaderProgram == null)
{
throw new InvalidOperationException("No shader program is loaded. Cannot set uniforms.");
}
int uniformLocation = Gl.GetUniformLocation(ActiveShaderProgram.ProgramId, name);
if (uniformLocation < 0)
{
throw new KeyNotFoundException(string.Format("The specified uniform '{0}' cannot be found for program '{1}'.", name, ActiveShaderProgram.ProgramId));
}
if (v4 != null && v4.HasValue)
{
Gl.Uniform4(uniformLocation, v1, v2.Value, v3.Value, v4.Value);
return;
}
if (v3 != null && v3.HasValue)
{
Gl.Uniform3(uniformLocation, v1, v2.Value, v3.Value);
return;
}
if (v2 != null && v2.HasValue)
{
Gl.Uniform2(uniformLocation, v1, v2.Value);
return;
}
Gl.Uniform1(uniformLocation, v1);
return;
}
public static void CheckGlErrors(string stage)
{
ErrorCode code = Gl.GetError();
if (code != ErrorCode.NoError)
{
throw new Exception(string.Format("OpenGL Draw error on stage {0}: {1}", stage, code.ToString()));
}
}
protected virtual void Renderer_ContextCreated_Wrap(RenderThread sender)
{
GlVersion ver = GlVersion.Parse(Gl.GetString(StringName.Version));
ContextCreationEventArgs args = new ContextCreationEventArgs(ver.Api, ver.Version, ver.ToString(), ver.Profile, Gl.GetString(StringName.Vendor));
Gl.GetError();
Renderer_ContextCreated(sender, args);
}
public void SelectShader(ShaderProgram program)
{
if (!FrameStarted)
{
throw new InvalidOperationException("Cannot select a Shader program when no frame is currently started on the GPU.");
}
ActiveShaderProgram = program;
Gl.UseProgram(program.ProgramId);
}
public void Unload()
{
if (!Compiled)
{
throw new InvalidOperationException("Cannot unload shader because its not loaded into the GPU.");
}
Compiled = false;
Gl.DeleteProgram(ProgramId);
}
protected int LoadTexture(Bitmap data, TextureWrapMode mode)
{
BitmapData lockedBitmap = data.LockBits(new Rectangle(Point.Empty, data.Size), ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
byte[] buffer = new byte[lockedBitmap.Width * lockedBitmap.Height * 4];
for (int i = 0; i < buffer.Length; i += 4)
{
byte r, g, b, a;
a = Marshal.ReadByte(lockedBitmap.Scan0 + i);
r = Marshal.ReadByte(lockedBitmap.Scan0 + i + 1);
g = Marshal.ReadByte(lockedBitmap.Scan0 + i + 2);
b = Marshal.ReadByte(lockedBitmap.Scan0 + i + 3);
buffer[i] = r;
buffer[i + 1] = g;
buffer[i + 2] = b;
buffer[i + 3] = a;
}
data.UnlockBits(lockedBitmap);
CheckGlErrors("pre-texture-gen");
int textureId = Gl.GenTexture();
Gl.ActiveTexture(TextureUnit.Texture0);
Gl.BindTexture(TextureTarget.Texture2D, textureId);
Gl.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.Linear);
Gl.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
Gl.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)mode);
Gl.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)mode);
CheckGlErrors("pre-texture-upload");
Gl.TexImage2D(TextureTarget.Texture2D,
0,
PixelInternalFormat.Rgba8,
data.Width, data.Height,
0,
PixelFormat.Rgba,
PixelType.UnsignedByte,
buffer);
CheckGlErrors("post-texture-upload");
if (mode == TextureWrapMode.ClampToBorder)
{
float[] borderColor = new float[] { 0xff, 0x14, 0x93 };
Gl.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureBorderColor, borderColor);
}
CheckGlErrors("ok-texture-gen");
return(textureId);
}
protected override void Renderer_DrawPrepare(RenderThread sender, FrameStageControllerEventArgs args)
{
CheckGlErrors("pre-program");
sender.SelectShader(glyphShader);
CheckGlErrors("post-program");
sender.SelectShader(glyphShader);
sender.SetUniform("resolution", 0, 0, sender.InternalResolution.Width, sender.InternalResolution.Height);
sender.SetUniform("atlasSize", fontAtlas.AtlasTextureSize.Width, fontAtlas.AtlasTextureSize.Height);
Gl.Uniform1(Gl.GetUniformLocation(glyphShader.ProgramId, "atlasTexture"), 0);
CheckGlErrors("post-uniforms");
}
protected override void Renderer_ContextCreated(RenderThread sender, ContextCreationEventArgs args)
{
Log.WriteLine("Context created. Using: " + Gl.GetString(StringName.Renderer) + Gl.GetString(StringName.Version));
Log.WriteLine("Renderer_ContextCreated");
Renderer.TargetWindow.Resize += TargetWindow_Resize;
// Load Shaders
string vertex = File.ReadAllText("./shaders/hello.vert".Replace('/', Path.DirectorySeparatorChar));
string fragment = File.ReadAllText("./shaders/hello.frag".Replace('/', Path.DirectorySeparatorChar));
// Compile shaders
Log.WriteLine("Compiling shader 'hello'...");
shader = new ShaderProgram(vertex, fragment);
shader.Compile();
Log.WriteLine("Compiled shader index: %@", LogLevel.Message, shader.ProgramId);
// Load vertices and indices
vertices = new float[] {
0.0f, 0.5f, 0.0f, // top
0.5f, -0.5f, 0.0f, // bottom right
-0.5f, -0.5f, 0.0f, // bottom left
};
// Setup global VAO
VAO = Gl.GenVertexArray();
Gl.BindVertexArray(VAO);
CheckGlErrors("Renderer_ContextCreated:AfterVAO");
// Setup VBO (vertices)
VBO = Gl.GenBuffer();
Gl.BindBuffer(BufferTarget.ArrayBuffer, VBO);
int size = (sizeof(float) * vertices.Length); // size must be 36
Gl.BufferData(BufferTarget.ArrayBuffer, size, vertices, BufferUsageHint.StaticDraw);
CheckGlErrors("Renderer_ContextCreated:AfterBufferDataVBO");
Gl.VertexAttribPointer(0, 3, VertexAttribPointerType.Float, false, 3 * sizeof(float), 0);
CheckGlErrors("Renderer_ContextCreated:AfterVAP_VBO");
Gl.EnableVertexAttribArray(0);
CheckGlErrors("Renderer_ContextCreated:AfterVBO");
// Unbind
Gl.BindVertexArray(0);
CheckGlErrors("Renderer_ContextCreated:End");
}
protected override void Renderer_ContextCreated(RenderThread sender, ContextCreationEventArgs args)
{
Log.WriteLine("Render context created. Continuing initialization...");
Log.WriteLine("Running on OpenGL: %@", LogLevel.Message, Gl.GetString(StringName.Renderer) + Gl.GetString(StringName.Version));
Renderer.TargetWindow.KeyDown += TargetWindow_KeyDown;
Renderer.TargetWindow.KeyUp += TargetWindow_KeyUp;
CompileShaders();
LoadTextures();
Gl.BlendFunc(BlendingFactor.SrcAlpha, BlendingFactor.OneMinusSrcAlpha);
VAO = Gl.GenVertexArray();
Gl.BindVertexArray(VAO);
CheckGlErrors("pre-texture");
Gl.ActiveTexture(TextureUnit.Texture0);
Gl.BindTexture(TextureTarget.Texture2D, fontAtlasTexture);
CheckGlErrors("post-texture");
VBO = Gl.GenBuffer();
Gl.BindBuffer(BufferTarget.ArrayBuffer, VBO);
EBO = Gl.GenBuffer();
Gl.BindBuffer(BufferTarget.ElementArrayBuffer, EBO);
CheckGlErrors("pre_va_pointer");
Gl.VertexAttribPointer(0, 2, VertexAttribPointerType.Float, false, 12 * sizeof(float), 0 * sizeof(float));
CheckGlErrors("post-va-pointer-0-set");
Gl.EnableVertexAttribArray(0);
CheckGlErrors("post-va-pointer-0-enable");
Gl.VertexAttribPointer(1, 2, VertexAttribPointerType.Float, false, 12 * sizeof(float), 2 * sizeof(float));
Gl.EnableVertexAttribArray(1);
CheckGlErrors("post-va-pointer-1");
Gl.VertexAttribPointer(2, 4, VertexAttribPointerType.Float, false, 12 * sizeof(float), 4 * sizeof(float));
Gl.EnableVertexAttribArray(2);
CheckGlErrors("post-va-pointer-2");
Gl.VertexAttribPointer(3, 4, VertexAttribPointerType.Float, false, 12 * sizeof(float), 8 * sizeof(float));
Gl.EnableVertexAttribArray(3);
}
protected override void Renderer_Draw(RenderThread sender, FrameStageEventArgs args)
{
Log.WriteLine("Renderer_Draw(%@)", LogLevel.Message, args.CurrentTime.FrameIndex);
Gl.BindVertexArray(VAO);
CheckGlErrors("Renderer_Draw:BindVAO");
Gl.ClearColor(0.2f, 0.3f, 0.3f, 1.0f);
Gl.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
CheckGlErrors("Renderer_Draw:Clear");
Gl.UseProgram(shader.ProgramId);
CheckGlErrors("Renderer_Draw:UseProgram");
Gl.DrawElements(PrimitiveType.Triangles, 6, DrawElementsType.UnsignedInt, 0);
CheckGlErrors("Renderer_Draw:DrawElements");
}
protected int LinkShaderProgram(int vertexId, int fragmentId)
{
int programId = Gl.CreateProgram();
Gl.AttachShader(programId, vertexId);
Gl.AttachShader(programId, fragmentId);
Gl.LinkProgram(programId);
Gl.GetProgram(programId, GetProgramParameterName.LinkStatus, out int success);
if (success < 1)
{
string infoLog = null;
Gl.GetProgram(programId, GetProgramParameterName.InfoLogLength, out int loglen);
if (loglen > 0)
{
string log;
Gl.GetProgramInfoLog(programId, loglen, out _, out log);
infoLog = log;
}
throw new ShaderException(this, "Program Link failed.", infoLog);
}
//Gl.ValidateProgram(programId);
//Gl.GetProgram(programId, ProgramProperty.ValidateStatus, out success);
//if (success < 1)
//{
// string infoLog = null;
// Gl.GetProgram(programId, ProgramProperty.InfoLogLength, out int loglen);
// if (loglen > 0)
// {
// StringBuilder log = new StringBuilder(loglen);
// Gl.GetProgramInfoLog(programId, loglen, out _, log);
// infoLog = log.ToString();
// }
// throw new ShaderException(this, "Program Validation failed.", infoLog);
//}
return(programId);
}
protected int CompileShaderSource(ShaderType t, string code)
{
int shaderId = Gl.CreateShader(t);
Gl.ShaderSource(shaderId, code);
Gl.CompileShader(shaderId);
Gl.GetShader(shaderId, ShaderParameter.CompileStatus, out int success);
if (success < 1)
{
string infoLog = null;
Gl.GetShader(shaderId, ShaderParameter.InfoLogLength, out int loglen);
if (loglen > 0)
{
string log;
Gl.GetShaderInfoLog(shaderId, loglen, out _, out log);
infoLog = log;
}
throw new ShaderException(this, "Shader compilation failed. Type:" + t.ToString(), infoLog);
}
return(shaderId);
}
private void ClearBuffer()
{
Gl.ClearColor(ClearColor.R / 255.0f, ClearColor.G / 255.0f, ClearColor.B / 255.0f, 0.5f);
Gl.Clear(ClearBufferMask.ColorBufferBit);
}
private void TargetWindow_Resize(OpenToolkit.Windowing.Common.ResizeEventArgs obj)
{
Gl.Viewport(0, 0, obj.Width, obj.Height);
}
protected void DestroyShader(int shaderId)
{
Gl.DeleteShader(shaderId);
}
protected override void Renderer_Draw(RenderThread sender, FrameStageEventArgs args)
{
if (!sender.IsMainThread() && !sender.Asynchronous)
{
throw new InvalidOperationException("Draw operation initiated from secondary thread when supposed to run in Sync mode.");
}
float cellX = sender.InternalResolution.Width / (float)ConsoleSize.Width;
float cellY = sender.InternalResolution.Height / (float)ConsoleSize.Height;
List <float> vertices = new List <float>(4096);
List <uint> indices = new List <uint>(4096);
float[] db = ColorToFloatArray(DefaultBackColor);
float[] df = ColorToFloatArray(DefaultForeColor);
int vertexCount = 0;
for (int xi = 0; xi < ConsoleSize.Width; xi++)
{
float x = xi * cellX;
for (int yi = 0; yi < ConsoleSize.Height; yi++)
{
RenderGlyph glyphData = GetGlyph(xi, yi);
if (ShowCursor && xi == Cursor.X && yi == Cursor.Y && glyphData == null)
{
int val = (int)((args.CurrentTime.TotalRuntime / 1000.0f) / BlinkInterval);
if (val % 2 == 0 || BlinkInterval == 0)
{
glyphData = new RenderGlyph('_');
}
}
float y = yi * cellY;
Rectangle texRec = Rectangle.Empty;
int glyphId = (int)(glyphData?.Glyph ?? ' ');
if (fontAtlas.ContainsId(glyphId))
{
texRec = fontAtlas.GetPointerById(glyphId).Bounds;
}
else if (fontAtlas.ContainsId(0x558))
{
texRec = fontAtlas.GetPointerById(0x558).Bounds;
}
else
{
texRec = fontAtlas.GetPointerById((int)'?').Bounds;
}
float[] b = glyphData == null || !glyphData.Background.HasValue ? db : ColorToFloatArray(glyphData.Background.Value);
float[] f = glyphData == null || !glyphData.Foreground.HasValue ? df : ColorToFloatArray(glyphData.Foreground.Value);
int qi = vertexCount;
vertices.AddRange(new float[] { // Add vertices
x, y, // 0,0 (A)
texRec.X, texRec.Y, // Texture X,Y
b[0], b[1], b[2], b[3], // Back
f[0], f[1], f[2], f[3], // Fore
x + cellX, y, // 1,0 (B)
texRec.Right, texRec.Y, // Texture X,Y
b[0], b[1], b[2], b[3], // Back
f[0], f[1], f[2], f[3], // Fore
x + cellX, y + cellY, // 1,1 (C)
texRec.Right, texRec.Bottom, // Texture X,Y
b[0], b[1], b[2], b[3], // Back
f[0], f[1], f[2], f[3], // Fore
x, y + cellY, //0,1 (D)
texRec.X, texRec.Bottom, // Texture X,Y
b[0], b[1], b[2], b[3], // Back
f[0], f[1], f[2], f[3], // Fore
});
indices.AddRange(new uint[]
{
(uint)(qi + 1), // B
(uint)(qi + 3), // D
(uint)(qi), // A
(uint)(qi + 1), // B
(uint)(qi + 2), // C
(uint)(qi + 3), // D
});
vertexCount += 4;
}
}
Gl.BindVertexArray(VAO);
Gl.BindBuffer(BufferTarget.ArrayBuffer, VBO);
float[] fvertices = vertices.ToArray();
vertices.Clear();
uint[] iindices = indices.ToArray();
indices.Clear();
CheckGlErrors("pre-vab");
GCHandle buffAddress = GCHandle.Alloc(fvertices, GCHandleType.Pinned);
Gl.BufferData(BufferTarget.ArrayBuffer, fvertices.Length * sizeof(float), buffAddress.AddrOfPinnedObject(), BufferUsageHint.StreamDraw);
buffAddress.Free();
CheckGlErrors("pre-eab");
buffAddress = GCHandle.Alloc(iindices, GCHandleType.Pinned);
Gl.BufferData(BufferTarget.ElementArrayBuffer, iindices.Length * sizeof(float), buffAddress.AddrOfPinnedObject(), BufferUsageHint.StreamDraw);
buffAddress.Free();
CheckGlErrors("predraw");
Gl.DrawElements(BeginMode.Triangles, iindices.Length, DrawElementsType.UnsignedInt, 0);
CheckGlErrors("final");
Gl.BindVertexArray(0);
CheckGlErrors("unbind");
}