protected void Initialize()
{
uint[] bufferIds = new uint[1];
NativeGl.glGenBuffers(1, bufferIds);
this.BufferId = bufferIds[0];
}
public void UniformMatrix4Fv(uint location, int count, byte transpose, Matrix4 matrix)
{
unsafe
{
float *matrixPtr = &matrix.Row0.X;
NativeGl.glUniformMatrix4fv(location, count, transpose, matrixPtr);
}
}
public string GetInfoLog()
{
int length;
var error = new char[MaxInfologLength];
NativeGl.glGetProgramInfoLog(this.ProgramId, MaxInfologLength, out length, error);
return(StringExtensions.GetAnsiString(error, length));
}
public uint GetUniformLocation(string name)
{
var pname = MarshalExtensions.StringToPtrAnsi(name);
var handle = NativeGl.glGetUniformLocation(this.ProgramId, pname);
Marshal.FreeHGlobal(pname);
return(handle);
}
protected override void Dispose(bool disposing)
{
if (this.ShaderId != 0)
{
NativeGl.glDeleteShader(this.ShaderId);
}
base.Dispose(disposing);
}
private void InitializeGraphics()
{
try
{
// platform graphics setup
this.RenderingWindow = new RenderingWindow();
this.RenderingWindow.Show();
this.DisplayManager = new DisplayManager();
this.PlatformManager = new PlatformGraphicsManager(this.DisplayManager.GetDisplay(this.RenderingWindow));
this.PlatformManager.BindApi(Api.EGL_OPENGL_ES_API);
var attribs = new Attribs <ConfigAttributes>();
this.OnConfigureAttributes(attribs);
var config = this.PlatformManager.ChooseConfigs(attribs, 1).FirstOrDefault();
if (config == null)
{
throw new InvalidOperationException("Could not find matching configuration");
}
this.RenderingContext = this.PlatformManager.CreateContext(config, ContextVersion.OPENGL_ES_2);
this.RenderingSurface = this.PlatformManager.CreateWindowSurface(config, this.RenderingWindow);
this.RenderingContext.MakeCurrent(this.RenderingSurface, this.RenderingSurface);
// graphics device setup
this.GraphicsDevice = new GraphicsDevice
{
ClearColor = new Vector4(1, 1, 1, 1f),
Viewport = new Rectangle(
0,
0,
this.RenderingWindow.Width,
this.RenderingWindow.Height)
};
var error = NativeGl.glGetError();
if (error != NativeGl.GL_NO_ERROR)
{
throw new InvalidOperationException("Error while initializing graphics.");
}
}
catch (PlatformGraphicsException x)
{
MessageBox.Show(x.ToString());
this.ExitGame = true;
}
}
protected override void Dispose(bool disposing)
{
if (this.TextureName != 0)
{
var textures = new uint[1];
textures[0] = this.TextureName;
NativeGl.glDeleteTextures(1, textures);
}
base.Dispose(disposing);
}
public bool Compile()
{
NativeGl.glCompileShader(this.ShaderId);
var success = new[]
{
-1
};
NativeGl.glGetShaderiv(this.ShaderId, NativeGl.GL_COMPILE_STATUS, success);
return(success[0] == NativeGl.GL_TRUE);
}
public void BufferData <T>(int size, [In] T[] data, BufferUsage usage) where T : struct
{
GCHandle dataHandle = GCHandle.Alloc(data, GCHandleType.Pinned);
try
{
NativeGl.glBufferData((uint)this.Target, (IntPtr)size, dataHandle.AddrOfPinnedObject(), (uint)usage);
}
finally
{
dataHandle.Free();
}
}
protected override void Dispose(bool disposing)
{
if (this.BufferId > 0)
{
NativeGl.glDeleteBuffers(
1,
new[]
{
this.BufferId
});
}
base.Dispose(disposing);
}
public void ShaderSource(string source)
{
unsafe
{
int length = source.Length;
IntPtr[] ptrArray = new IntPtr[1];
IntPtr strPtr = MarshalExtensions.StringToPtrAnsi(source);
ptrArray[0] = strPtr;
NativeGl.glShaderSource(this.ShaderId, 1, ptrArray, &length);
Marshal.FreeHGlobal(strPtr);
}
}
public Texture CreateFromBytes(byte[] data, int width, int height, uint format, uint type)
{
uint textureId;
uint[] tex = new uint[1];
NativeGl.glGenTextures(1, tex);
textureId = tex[0];
NativeGl.glActiveTexture(NativeGl.GL_TEXTURE0);
NativeGl.glBindTexture(NativeGl.GL_TEXTURE_2D, textureId);
var handle = GCHandle.Alloc(data, GCHandleType.Pinned);
try
{
NativeGl.glTexParameterf(NativeGl.GL_TEXTURE_2D, NativeGl.GL_TEXTURE_MIN_FILTER, NativeGl.GL_LINEAR);
NativeGl.glTexParameterf(NativeGl.GL_TEXTURE_2D, NativeGl.GL_TEXTURE_MAG_FILTER, NativeGl.GL_LINEAR);
NativeGl.glTexParameterf(NativeGl.GL_TEXTURE_2D, NativeGl.GL_TEXTURE_WRAP_S, NativeGl.GL_CLAMP_TO_EDGE);
NativeGl.glTexParameterf(NativeGl.GL_TEXTURE_2D, NativeGl.GL_TEXTURE_WRAP_T, NativeGl.GL_CLAMP_TO_EDGE);
NativeGl.glTexImage2D(
NativeGl.GL_TEXTURE_2D,
0,
(int)format,
width,
height,
0,
format,
type,
handle.AddrOfPinnedObject());
}
catch (Exception x)
{
NativeGl.glDeleteTextures(1, tex);
throw;
}
finally
{
handle.Free();
}
NativeGl.glBindTexture(NativeGl.GL_TEXTURE_2D, 0);
var texture = new Texture(NativeGl.GL_TEXTURE_2D, textureId);
return(texture);
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
foreach (var shader in this.shaders)
{
NativeGl.glDetachShader(this.ProgramId, shader.ShaderId);
shader.Dispose();
}
}
if (this.ProgramId != 0)
{
NativeGl.glDeleteProgram(this.ProgramId);
}
base.Dispose(disposing);
}
private void Render(double deltaTime)
{
this.OnRender(deltaTime);
this.RenderingSurface.SwapBuffers();
var errorCode = NativeGl.glGetError();
if (errorCode == NativeGl.GL_NO_ERROR)
{
return;
}
var codeString = errorCode.ToString("X");
Trace.WriteLine(codeString);
this.ExitGame = true;
}
public bool Link()
{
this.OnBeforeLinked();
NativeGl.glLinkProgram(this.ProgramId);
var success = new[]
{
-1
};
NativeGl.glGetProgramiv(this.ProgramId, NativeGl.GL_LINK_STATUS, success);
var ok = success[0] == NativeGl.GL_TRUE;
if (ok)
{
this.OnLinked();
}
return(ok);
}
public void DisableBuffer(uint target)
{
NativeGl.glBindBuffer(target, 0);
}
public void BindTexture(TextureTarget textureTarget, uint textureName)
{
NativeGl.glBindTexture((uint)textureTarget, textureName);
}
public void Clear(ClearMask mask)
{
NativeGl.glClear((uint)mask);
}
public void BindBuffer(DeviceBuffer buffer)
{
NativeGl.glBindBuffer((uint)buffer.Target, buffer.BufferId);
}
public void ActivateTextureUnit(TextureUnit textureUnit)
{
NativeGl.glActiveTexture((uint)textureUnit);
}
private void UpdateViewport(Rectangle vp)
{
NativeGl.glViewport(vp.Left, vp.Top, vp.Width, vp.Height);
}
public void DisableVertexAttribArray(uint indx)
{
NativeGl.glDisableVertexAttribArray(indx);
}
public void VertexAttribPointer(uint indx, int size, GlType type, GlBoolean normalized, int stride, IntPtr ptr)
{
NativeGl.glVertexAttribPointer(indx, size, (uint)type, (byte)normalized, stride, ptr);
}
public void UseProgram(ShaderProgram program)
{
NativeGl.glUseProgram(program.ProgramId);
}
public void EnableVertexAttribArray(uint index)
{
NativeGl.glEnableVertexAttribArray(index);
}
public void Disable(Cap cap)
{
NativeGl.glDisable((uint)cap);
}
public void Enable(Cap cap)
{
NativeGl.glEnable((uint)cap);
}
public void DrawArrays(PrimitiveType mode, int first, int count)
{
NativeGl.glDrawArrays((uint)mode, first, count);
}
public void DrawElements(PrimitiveType mode, int count, uint type)
{
NativeGl.glDrawElements((uint)mode, count, type, IntPtr.Zero);
}
private void UpdateClearColor(Vector4 color)
{
NativeGl.glClearColor(color.X, color.Y, color.Z, color.W);
}