86 lines
2.7 KiB
C#
86 lines
2.7 KiB
C#
using System;
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using System.Windows.Forms;
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using System.Diagnostics;
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using SharpGL.Enumerations;
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using SharpGL.Version;
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using SharpGL;
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using System.ComponentModel;
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namespace JuicyGraphics {
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class canvas : Control, ISupportInitialize {
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protected OpenGL GL = new OpenGL();
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public canvas() {
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SetStyle(ControlStyles.AllPaintingInWmPaint, true);
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SetStyle(ControlStyles.UserPaint, true);
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InitializeOpenGL();
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}
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protected void InitializeOpenGL() {
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GL.Create(OpenGLVersion.OpenGL2_1, RenderContextType.NativeWindow, Width, Height, 32, this.Handle);
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GL.ShadeModel(OpenGL.GL_SMOOTH);
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GL.ClearDepth(1.0f);
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GL.Enable(OpenGL.GL_DEPTH_TEST);
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GL.DepthFunc(OpenGL.GL_LEQUAL);
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GL.Hint(OpenGL.GL_PERSPECTIVE_CORRECTION_HINT, OpenGL.GL_NICEST);
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GL.Viewport(0, 0, Width, Height);
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}
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bool renderingForDesigner() {
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if (this == null)
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return false;
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if (LicenseManager.UsageMode == LicenseUsageMode.Designtime)
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return true;
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Control p = this.Parent;
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while (p != null) {
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if (p.GetType().FullName.Contains(".DesignerFrame"))
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return true;
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p = p.Parent;
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}
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return false;
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}
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protected override void OnPaintBackground(PaintEventArgs e) {
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if (renderingForDesigner()) { base.OnPaintBackground(e); }
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return;
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}
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protected override void OnPaint(PaintEventArgs e) {
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if (renderingForDesigner()) {
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SetStyle(ControlStyles.AllPaintingInWmPaint, true);
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SetStyle(ControlStyles.UserPaint, true);
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InitializeOpenGL();
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}
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GL.MakeCurrent();
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GL.ClearColor(0f, 0.3f, 0.7f, 1f);
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GL.Clear(OpenGL.GL_COLOR_BUFFER_BIT | OpenGL.GL_DEPTH_BUFFER_BIT);
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GL.Begin(BeginMode.Triangles);
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GL.Color(0.8, 0.1, 0.1);
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GL.Vertex(1.0, 1.0);
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GL.Vertex(-1.0, -1.0); GL.Vertex(-1.0, 1.0);
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GL.End();
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GL.Flush();
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var handleDeviceContext = e.Graphics.GetHdc();
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GL.Blit(handleDeviceContext);
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e.Graphics.ReleaseHdc(handleDeviceContext);
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}
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protected override void OnSizeChanged(EventArgs e) {
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if (GL.RenderContextProvider == null)
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return;
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GL.SetDimensions(Width, Height);
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GL.Viewport(0, 0, Width, Height);
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Invalidate();
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}
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public void BeginInit() {
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}
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public void EndInit() {
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InitializeOpenGL();
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OnSizeChanged(null);
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}
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}
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} |