/// <summary>
/// Creates the render context provider. Must also create the OpenGL extensions.
/// </summary>
/// <param name="gl">The OpenGL context.</param>
/// <param name="width">The width.</param>
/// <param name="height">The height.</param>
/// <param name="bitDepth">The bit depth.</param>
/// <param name="parameter"></param>
/// <returns></returns>
public override bool Create(OpenGL gl, int width, int height, int bitDepth, object parameter)
{
this.gl = gl;
// Call the base class.
base.Create(gl, width, height, bitDepth, parameter);
uint[] ids = new uint[1];
// First, create the frame buffer and bind it.
ids = new uint[1];
gl.GenFramebuffersEXT(1, ids);
frameBufferID = ids[0];
gl.BindFramebufferEXT(OpenGL.GL_FRAMEBUFFER_EXT, frameBufferID);
// Create the colour render buffer and bind it, then allocate storage for it.
gl.GenRenderbuffersEXT(1, ids);
colourRenderBufferID = ids[0];
gl.BindRenderbufferEXT(OpenGL.GL_RENDERBUFFER_EXT, colourRenderBufferID);
gl.RenderbufferStorageEXT(OpenGL.GL_RENDERBUFFER_EXT, OpenGL.GL_RGBA, width, height);
// Create the depth render buffer and bind it, then allocate storage for it.
gl.GenRenderbuffersEXT(1, ids);
depthRenderBufferID = ids[0];
gl.BindRenderbufferEXT(OpenGL.GL_RENDERBUFFER_EXT, depthRenderBufferID);
gl.RenderbufferStorageEXT(OpenGL.GL_RENDERBUFFER_EXT, OpenGL.GL_DEPTH_COMPONENT24, width, height);
// Set the render buffer for colour and depth.
gl.FramebufferRenderbufferEXT(OpenGL.GL_FRAMEBUFFER_EXT, OpenGL.GL_COLOR_ATTACHMENT0_EXT,
OpenGL.GL_RENDERBUFFER_EXT, colourRenderBufferID);
gl.FramebufferRenderbufferEXT(OpenGL.GL_FRAMEBUFFER_EXT, OpenGL.GL_DEPTH_ATTACHMENT_EXT,
OpenGL.GL_RENDERBUFFER_EXT, depthRenderBufferID);
dibSectionDeviceContext = Win32.CreateCompatibleDC(deviceContextHandle);
// Create the DIB section.
dibSection.Create(dibSectionDeviceContext, width, height, bitDepth);
return(true);
}
public FBO(OpenGL gl, int width, int height)
{
_gl = gl;
if (width < 1) width = 16;
if (height < 1) height = 16;
gl.GenFramebuffersEXT(1, _fbo);
ColorTexture = new Texture(gl);
using (new Bind(ColorTexture))
{
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_WRAP_S, OpenGL.GL_REPEAT);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_WRAP_T, OpenGL.GL_REPEAT);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_MIN_FILTER, OpenGL.GL_NEAREST);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_MAG_FILTER, OpenGL.GL_NEAREST);
gl.TexImage2D(OpenGL.GL_TEXTURE_2D, 0, OpenGL.GL_RGBA, width, height, 0, OpenGL.GL_RGBA, OpenGL.GL_UNSIGNED_BYTE, null);
}
DepthTexture = new Texture(gl);
using (new Bind(DepthTexture))
{
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_WRAP_S, OpenGL.GL_REPEAT);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_WRAP_T, OpenGL.GL_REPEAT);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_MIN_FILTER, OpenGL.GL_NEAREST);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_MAG_FILTER, OpenGL.GL_NEAREST);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_DEPTH_TEXTURE_MODE_ARB, OpenGL.GL_INTENSITY);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_COMPARE_MODE, OpenGL.GL_COMPARE_R_TO_TEXTURE_ARB);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_COMPARE_FUNC, OpenGL.GL_LEQUAL);
gl.TexImage2D(OpenGL.GL_TEXTURE_2D, 0, OpenGL.GL_DEPTH_COMPONENT24, width, height, 0, OpenGL.GL_DEPTH_COMPONENT, OpenGL.GL_UNSIGNED_BYTE, null);
}
using (new Bind(this))
{
gl.FramebufferTexture2DEXT(OpenGL.GL_FRAMEBUFFER_EXT, OpenGL.GL_COLOR_ATTACHMENT0_EXT, OpenGL.GL_TEXTURE_2D, ColorTexture.Handle, 0);
gl.FramebufferTexture2DEXT(OpenGL.GL_FRAMEBUFFER_EXT, OpenGL.GL_DEPTH_ATTACHMENT_EXT, OpenGL.GL_TEXTURE_2D, DepthTexture.Handle, 0);
var status = _gl.CheckFramebufferStatusEXT(OpenGL.GL_FRAMEBUFFER_EXT);
if (status != OpenGL.GL_FRAMEBUFFER_COMPLETE_EXT) throw new Exception();
}
}
