public unsafe void DrawGeometry(Brush brush, Pen pen, Geometry geometry)
{
BrushShader shader = brush.GetShaderInternal(geometry);
gl.EnableClientState(gl.GL_VERTEX_ARRAY);
fixed (Color* colors = shader.Colors)
{
fixed (TextureCoordinate* texCoords = shader.TextureCoordinates)
{
if (colors != null)
{
gl.EnableClientState(gl.GL_COLOR_ARRAY);
gl.ColorPointer(4, gl.GL_FLOAT, 0, (IntPtr)colors);
}
if (texCoords != null && shader.ImageSource != null)
{
gl.EnableClientState(gl.GL_TEXTURE_COORD_ARRAY);
gl.Enable(gl.GL_TEXTURE_2D);
gl.BindTexture(gl.GL_TEXTURE_2D, shader.ImageSource.myName);
gl.TexCoordPointer(2, gl.GL_FLOAT, 0, (IntPtr)texCoords);
}
if (shader.Color != null)
{
Color color = shader.Color.Value;
gl.Color4f(color.ScR, color.ScG, color.ScB, color.ScA);
}
fixed (short* indices = geometry.Indices)
{
fixed (Point* points = geometry.Points)
{
gl.VertexPointer(3, gl.GL_FLOAT, 0, (IntPtr)points);
if (geometry.Indices != null)
gl.DrawElements((uint)geometry.GeometryType, geometry.Indices.Length, gl.GL_UNSIGNED_SHORT, (IntPtr)indices);
else
gl.DrawArrays((uint)geometry.GeometryType, 0, geometry.Points.Length);
}
}
if (shader.Color != null)
gl.Color4f(1, 1, 1, 1);
if (texCoords != null && shader.ImageSource != null)
gl.Disable(gl.GL_TEXTURE_2D);
if (colors != null)
gl.DisableClientState(gl.GL_COLOR_ARRAY);
}
}
gl.DisableClientState(gl.GL_VERTEX_ARRAY);
}