public Framebuffer(OpenGLGraphics graphics, Surface surface)
{
if (graphics is null)
{
throw new ArgumentNullException(nameof(graphics));
}
// Get the surface storage
_storage = surface.Native as FramebufferStorage;
if (_storage == null)
{
throw new InvalidOperationException($"Framebufer storage was unexpectedly null.");
}
_surface = surface ?? throw new ArgumentNullException(nameof(surface));
// Construct target
TextureFBO = new TextureTarget(graphics, _storage.Texture);
if (_storage.HasMultisampleTarget)
{
// Construct msaa target
MultisampleFBO = new TextureTarget(graphics, _storage.MultisampleTexture);
// RenderbufferFBO = new RenderbufferTarget(graphics, _storage.Renderbuffer);
}
}
public PackerAtlasTechnique(OpenGLGraphics graphics)
: base(graphics)
{
_entries = new Dictionary <Image, AtlasEntry>();
// Create packer - it will be at most 256 megabytes (8192^2 * 4 bytes)
var pageSize = Calc.Min(8192, graphics.Capabilities.MaxTextureSize);
_packer = new SkylinePacker <Image>(pageSize, pageSize);
// Allocate texture (page)
_texture = Graphics.Invoke(() => new Texture(_packer.Size, TextureSizedFormat.RGBA8));
}
public TextureTarget(OpenGLGraphics graphics, Texture texture)
{
_graphics = graphics;
Texture = texture;
// Generate framebuffer
Handle = GL.GenFramebuffer();
GL.BindFramebuffer(FramebufferTarget.Framebuffer, Handle);
// Attach to framebuffer
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.Color0, (TextureImageTarget)texture.Target, Texture.Handle, 0);
// Ensure framebuffer is valid
var status = GL.CheckFramebufferStatus(FramebufferTarget.Framebuffer);
if (status != FramebufferStatus.Complete)
{
throw new InvalidOperationException($"Unable to initialize multisample framebuffer. {status}");
}
// Unbind framebuffer
GL.BindFramebuffer(FramebufferTarget.Framebuffer, 0);
}
public RenderbufferTarget(OpenGLGraphics graphics, Renderbuffer renderbuffer)
{
_graphics = graphics;
Renderbuffer = renderbuffer;
// Generate framebuffer
Handle = GL.GenFramebuffer();
GL.BindFramebuffer(FramebufferTarget.Framebuffer, Handle);
// Attach to framebuffer
GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, FramebufferAttachment.Color0, Renderbuffer.Handle);
// Ensure framebuffer is valid
var status = GL.CheckFramebufferStatus(FramebufferTarget.Framebuffer);
if (status != FramebufferStatus.Complete)
{
throw new InvalidOperationException($"Unable to initialize multisample framebuffer. {status}");
}
// Unbind framebuffer
GL.BindFramebuffer(FramebufferTarget.Framebuffer, 0);
}
public SimpleAtlasTechnique(OpenGLGraphics graphics)
: base(graphics)
{
_textures = new ConditionalWeakTable <Image, Texture>();
}
protected AtlasTechnique(OpenGLGraphics graphics)
{
Graphics = graphics ?? throw new ArgumentNullException(nameof(graphics));
}