From edd10b86d923fe06f5e84d5ee69bd76b89c3605e Mon Sep 17 00:00:00 2001
From: the_fiddler <the_fiddler@ebc5dd9b-fb1d-0410-b6f8-d24c324e9604>
Date: Mon, 3 Mar 2008 12:45:18 +0000
Subject: [PATCH] Report the size of uploaded VBO data, when an error occurs.

---
 Source/Examples/Tutorial/T10_GLSL_Cube.cs | 27 +++++++++++++++--------
 1 file changed, 18 insertions(+), 9 deletions(-)

diff --git a/Source/Examples/Tutorial/T10_GLSL_Cube.cs b/Source/Examples/Tutorial/T10_GLSL_Cube.cs
index 8e980746..87d0e546 100644
--- a/Source/Examples/Tutorial/T10_GLSL_Cube.cs
+++ b/Source/Examples/Tutorial/T10_GLSL_Cube.cs
@@ -132,24 +132,33 @@ namespace Examples.Tutorial
 
             // Upload the vertex data.
             GL.BindBuffer(BufferTarget.ArrayBuffer, vertex_buffer_object);
-            GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(shape.Vertices.Length * 3 * sizeof(float)), shape.Vertices, BufferUsageHint.StaticDraw);
+            GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(shape.Vertices.Length * 3 * sizeof(float)), shape.Vertices,
+                BufferUsageHint.StaticDraw);
             GL.GetBufferParameter(BufferTarget.ArrayBuffer, BufferParameterName.BufferSize, out size);
             if (size != shape.Vertices.Length * 3 * sizeof(Single))
-                throw new ApplicationException("Problem uploading vertex data to VBO");
+                throw new ApplicationException(String.Format(
+                    "Problem uploading vertex data to VBO (vertices). Tried to upload {0} bytes, uploaded {1}.",
+                    shape.Vertices.Length * 3 * sizeof(Single), size));
 
             // Upload the color data.
             GL.BindBuffer(BufferTarget.ArrayBuffer, color_buffer_object);
-            GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(shape.Colors.Length * sizeof(int)), shape.Colors, BufferUsageHint.StaticDraw);
+            GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(shape.Colors.Length * sizeof(int)), shape.Colors,
+                BufferUsageHint.StaticDraw);
             GL.GetBufferParameter(BufferTarget.ArrayBuffer, BufferParameterName.BufferSize, out size);
-            if (shape.Colors.Length * sizeof(int) != size)
-                throw new ApplicationException("Problem uploading color data to VBO");
+            if (size != shape.Colors.Length * sizeof(int))
+                throw new ApplicationException(String.Format(
+                    "Problem uploading vertex data to VBO (colors). Tried to upload {0} bytes, uploaded {1}.",
+                    shape.Colors.Length * sizeof(int), size));
             
             // Upload the index data (elements inside the vertex data, not color indices as per the IndexPointer function!)
             GL.BindBuffer(BufferTarget.ElementArrayBuffer, element_buffer_object);
-            GL.BufferData(BufferTarget.ElementArrayBuffer, (IntPtr)(shape.Indices.Length * sizeof(Int32)), shape.Indices, BufferUsageHint.StaticDraw);
+            GL.BufferData(BufferTarget.ElementArrayBuffer, (IntPtr)(shape.Indices.Length * sizeof(Int32)), shape.Indices,
+                BufferUsageHint.StaticDraw);
             GL.GetBufferParameter(BufferTarget.ElementArrayBuffer, BufferParameterName.BufferSize, out size);
-            if (shape.Indices.Length * 4 != size)
-                throw new ApplicationException("Problem uploading index data to VBO");
+            if (size != shape.Indices.Length * sizeof(int))
+                throw new ApplicationException(String.Format(
+                    "Problem uploading vertex data to VBO (offsets). Tried to upload {0} bytes, uploaded {1}.",
+                    shape.Indices.Length * sizeof(int), size));
         }
 
         #endregion
@@ -256,7 +265,7 @@ namespace Examples.Tutorial
             //if (error != 0)
             //    Debug.Print(Glu.ErrorString(Glu.Enums.ErrorCode.INVALID_OPERATION));
 
-            Context.SwapBuffers();
+            SwapBuffers();
         }
 
         #endregion