public CglContext()
{
var attributes = new [] {
CGLPixelFormatAttribute.kCGLPFAOpenGLProfile, (CGLPixelFormatAttribute)CGLOpenGLProfile.kCGLOGLPVersion_3_2_Core,
CGLPixelFormatAttribute.kCGLPFADoubleBuffer,
CGLPixelFormatAttribute.kCGLPFANone
};
IntPtr pixFormat;
int npix;
Cgl.CGLChoosePixelFormat(attributes, out pixFormat, out npix);
if (pixFormat == IntPtr.Zero)
{
throw new Exception("CGLChoosePixelFormat failed.");
}
Cgl.CGLCreateContext(pixFormat, IntPtr.Zero, out fContext);
Cgl.CGLReleasePixelFormat(pixFormat);
if (fContext == IntPtr.Zero)
{
throw new Exception("CGLCreateContext failed.");
}
}
public override void Destroy()
{
if (fContext != IntPtr.Zero)
{
Cgl.CGLReleaseContext(fContext);
fContext = IntPtr.Zero;
}
}
public override GRGlTextureInfo CreateTexture(SKSizeI textureSize)
{
var textures = new uint[1];
Cgl.glGenTextures(textures.Length, textures);
var textureId = textures[0];
Cgl.glBindTexture(Cgl.GL_TEXTURE_2D, textureId);
Cgl.glTexImage2D(Cgl.GL_TEXTURE_2D, 0, Cgl.GL_RGBA, textureSize.Width, textureSize.Height, 0, Cgl.GL_RGBA, Cgl.GL_UNSIGNED_BYTE, IntPtr.Zero);
Cgl.glBindTexture(Cgl.GL_TEXTURE_2D, 0);
return(new GRGlTextureInfo {
Id = textureId,
Target = Cgl.GL_TEXTURE_2D
});
}
public override void DestroyTexture(uint texture)
{
Cgl.glDeleteTextures(1, new[] { texture });
}
public override void SwapBuffers()
{
Cgl.CGLFlushDrawable(fContext);
}
public override void MakeCurrent()
{
Cgl.CGLSetCurrentContext(fContext);
}