/// <summary>
/// GetShader loads a shader resource from disk
/// </summary>
private RhGLShaderProgram GetShader(string baseName)
{
for (int i = 0; i < Shaders.Count; i++)
{
var shader = Shaders [i];
if (shader.Name.Equals(baseName, StringComparison.InvariantCultureIgnoreCase))
{
SetupShader(shader, Model, Viewport);
return(shader);
}
}
String vertex_shader = GetResourceAsString(baseName, "vsh");
String fragment_shader = GetResourceAsString(baseName, "fsh");
var new_shader = RhGLShaderProgram.BuildProgram(baseName, vertex_shader, fragment_shader);
if (new_shader != null)
{
Shaders.Add(new_shader);
}
SetupShader(new_shader, Model, Viewport);
return(new_shader);
}
/// <summary>
/// Creates a default light and enables the active shader
/// </summary>
private void SetupShader(RhGLShaderProgram shader, RMModel model, ViewportInfo viewport)
{
// Check to make sure we actually have an active shader...
if (shader != null)
{
// Enable...
shader.Enable();
// Now setup and initialize frustum and lighting...
int near, far;
viewport.GetScreenPort(out near, out far);
viewport.SetScreenPort((int)Frame.Left, (int)Frame.Right, (int)Frame.Bottom, (int)Frame.Top, near, far);
shader.SetupViewport(viewport);
Rhino.Geometry.Light light = CreateDefaultLight();
shader.SetupLight(light);
light.Dispose();
}
}
/// <summary>
/// For derived class implementers.
/// <para>This method is called with argument true when class user calls Dispose(), while with argument false when
/// the Garbage Collector invokes the finalizer, or Finalize() method.</para>
/// <para>You must reclaim all used unmanaged resources in both cases, and can use this chance to call Dispose on disposable fields if the argument is true.</para>
/// <para>Also, you must call the base virtual method within your overriding method.</para>
/// </summary>
/// <param name="disposing">true if the call comes from the Dispose() method; false if it comes from the Garbage Collector finalizer.</param>
protected virtual void Dispose(bool disposing)
{
// Free unmanaged resources...
// Free managed resources...but only if called from Dispose
// (If called from Finalize then the objects might not exist anymore)
if (disposing)
{
if (Model != null)
{
Model.Dispose();
Model = null;
}
Frame = System.Drawing.RectangleF.Empty;
if (Viewport != null)
{
Viewport.Dispose();
Viewport = null;
}
CurrentMaterial = null;
if (ActiveShader != null)
{
GL.DeleteProgram(ActiveShader.Handle);
ActiveShader.Disable();
m_activeShader = null;
}
if (Shaders != null)
{
Shaders.Clear();
Shaders = null;
}
}
}
/// <summary>
/// Creates a default light and enables the active shader
/// </summary>
private void SetupShader(RhGLShaderProgram shader, RMModel model, ViewportInfo viewport)
{
// Check to make sure we actually have an active shader...
if (shader != null) {
// Enable...
shader.Enable ();
// Now setup and initialize frustum and lighting...
int near, far;
viewport.GetScreenPort (out near, out far);
viewport.SetScreenPort ((int)Frame.Left, (int)Frame.Right, (int)Frame.Bottom, (int)Frame.Top, near, far);
shader.SetupViewport (viewport);
Rhino.Geometry.Light light = CreateDefaultLight ();
shader.SetupLight (light);
light.Dispose ();
}
}
/// <summary>
/// For derived class implementers.
/// <para>This method is called with argument true when class user calls Dispose(), while with argument false when
/// the Garbage Collector invokes the finalizer, or Finalize() method.</para>
/// <para>You must reclaim all used unmanaged resources in both cases, and can use this chance to call Dispose on disposable fields if the argument is true.</para>
/// <para>Also, you must call the base virtual method within your overriding method.</para>
/// </summary>
/// <param name="disposing">true if the call comes from the Dispose() method; false if it comes from the Garbage Collector finalizer.</param>
protected virtual void Dispose(bool disposing)
{
// Free unmanaged resources...
// Free managed resources...but only if called from Dispose
// (If called from Finalize then the objects might not exist anymore)
if (disposing) {
if (Model != null) {
Model.Dispose ();
Model = null;
}
Frame = System.Drawing.RectangleF.Empty;
if (Viewport != null) {
Viewport.Dispose ();
Viewport = null;
}
CurrentMaterial = null;
if (ActiveShader != null) {
GL.DeleteProgram (ActiveShader.Handle);
ActiveShader.Disable ();
m_activeShader = null;
}
if (Shaders != null) {
Shaders.Clear ();
Shaders = null;
}
}
}
/// <summary>
/// Builds both the vertex and the fragment shaders
/// Shaders MUST consist of both a vertex AND a fragment shader in 2.0.
/// </summary>
public static RhGLShaderProgram BuildProgram(string name, string vertexShader, string fragmentShader)
{
if (String.IsNullOrWhiteSpace (vertexShader) || String.IsNullOrWhiteSpace (fragmentShader))
return null;
int hVsh = BuildShader (vertexShader, ShaderType.VertexShader);
int hFsh = BuildShader (fragmentShader, ShaderType.FragmentShader);
if (hVsh == 0 || hFsh == 0)
return null;
int program_handle = GL.CreateProgram ();
if (program_handle == 0 )
return null;
GL.AttachShader (program_handle, hVsh);
GL.AttachShader (program_handle, hFsh);
// These bindings are forced here so that mesh drawing can enable the
// appropriate vertex array based on the same binding values.
// Note: These must be done before we attempt to link the program...
// Note2: Rhino supports multiple textures but for now we'll only
// provide for a single set of texture coordinates.
GL.BindAttribLocation (program_handle, (int)VertexAttributes.AttribVertex, "rglVertex");
GL.BindAttribLocation (program_handle, (int)VertexAttributes.AttribNormal, "rglNormal");
GL.BindAttribLocation (program_handle, (int)VertexAttributes.AttribTexcoord0, "rglTexCoord0");
GL.BindAttribLocation (program_handle, (int)VertexAttributes.AttribColor, "rglColor");
GL.LinkProgram (program_handle);
int success;
GL.GetProgram(program_handle, ProgramParameter.LinkStatus, out success);
if (success == 0) {
#if DEBUG
int logLength;
GL.GetProgram (program_handle, ProgramParameter.InfoLogLength, out logLength);
if (logLength > 0) {
string log = GL.GetProgramInfoLog (program_handle);
System.Diagnostics.Debug.WriteLine (log);
}
#endif
GL.DetachShader (program_handle, hVsh);
GL.DetachShader (program_handle, hFsh);
GL.DeleteProgram (program_handle);
program_handle = 0;
}
GL.DeleteShader (hVsh);
GL.DeleteShader (hFsh);
if (program_handle == 0)
return null;
RhGLShaderProgram program = new RhGLShaderProgram (name, program_handle);
program.ResolvePredefines ();
return program;
}
/// <summary>
/// Builds both the vertex and the fragment shaders
/// Shaders MUST consist of both a vertex AND a fragment shader in 2.0.
/// </summary>
public static RhGLShaderProgram BuildProgram(string name, string vertexShader, string fragmentShader)
{
if (String.IsNullOrWhiteSpace(vertexShader) || String.IsNullOrWhiteSpace(fragmentShader))
{
return(null);
}
int hVsh = BuildShader(vertexShader, ShaderType.VertexShader);
int hFsh = BuildShader(fragmentShader, ShaderType.FragmentShader);
if (hVsh == 0 || hFsh == 0)
{
return(null);
}
int program_handle = GL.CreateProgram();
if (program_handle == 0)
{
return(null);
}
GL.AttachShader(program_handle, hVsh);
GL.AttachShader(program_handle, hFsh);
// These bindings are forced here so that mesh drawing can enable the
// appropriate vertex array based on the same binding values.
// Note: These must be done before we attempt to link the program...
// Note2: Rhino supports multiple textures but for now we'll only
// provide for a single set of texture coordinates.
GL.BindAttribLocation(program_handle, (int)VertexAttributes.AttribVertex, "rglVertex");
GL.BindAttribLocation(program_handle, (int)VertexAttributes.AttribNormal, "rglNormal");
GL.BindAttribLocation(program_handle, (int)VertexAttributes.AttribTexcoord0, "rglTexCoord0");
GL.BindAttribLocation(program_handle, (int)VertexAttributes.AttribColor, "rglColor");
GL.LinkProgram(program_handle);
int success;
GL.GetProgram(program_handle, ProgramParameter.LinkStatus, out success);
if (success == 0)
{
#if DEBUG
int logLength;
GL.GetProgram(program_handle, ProgramParameter.InfoLogLength, out logLength);
if (logLength > 0)
{
string log = GL.GetProgramInfoLog(program_handle);
System.Diagnostics.Debug.WriteLine(log);
}
#endif
GL.DetachShader(program_handle, hVsh);
GL.DetachShader(program_handle, hFsh);
GL.DeleteProgram(program_handle);
program_handle = 0;
}
GL.DeleteShader(hVsh);
GL.DeleteShader(hFsh);
if (program_handle == 0)
{
return(null);
}
RhGLShaderProgram program = new RhGLShaderProgram(name, program_handle);
program.ResolvePredefines();
return(program);
}
