public void Bind(ISystemOpenGL.Context context)
{
// create new framebuffer if it's needed
// frame buffers are not shared between contexts
if (!framebuffers.TryGetValue(context, out uint id))
{
id = GL.GenFramebuffer();
GL.BindFramebuffer(GLEnum.FRAMEBUFFER, id);
// color attachments
int i = 0;
foreach (Texture texture in Attachments)
{
if (texture.Implementation is GL_Texture glTexture)
{
if (texture.Format.IsTextureColorFormat())
{
GL.FramebufferTexture2D(GLEnum.FRAMEBUFFER, GLEnum.COLOR_ATTACHMENT0 + i, GLEnum.TEXTURE_2D, glTexture.ID, 0);
i++;
}
else
{
GL.FramebufferTexture2D(GLEnum.FRAMEBUFFER, GLEnum.DEPTH_STENCIL_ATTACHMENT, GLEnum.TEXTURE_2D, glTexture.ID, 0);
}
}
}
framebuffers.Add(context, id);
}
else
{
GL.BindFramebuffer(GLEnum.FRAMEBUFFER, id);
}
}
internal ContextMeta GetContextMeta(ISystemOpenGL.Context context)
{
if (!contextMetadata.TryGetValue(context, out var meta))
{
contextMetadata[context] = meta = new ContextMeta();
}
return(meta);
}
protected override void FirstWindowCreated()
{
GL.Init(this, System);
GL.DepthMask(true);
MaxTextureSize = GL.MaxTextureSize;
OriginBottomLeft = true;
ApiVersion = new Version(GL.MajorVersion, GL.MinorVersion);
DeviceName = GL.GetString(GLEnum.RENDERER);
BackgroundContext = System.CreateGLContext();
}
static void Clear(GL_Graphics graphics, ISystemOpenGL.Context context, RenderTarget target, Clear flags, Color color, float depth, int stencil, RectInt viewport)
{
// update the viewport
var meta = graphics.GetContextMeta(context);
{
viewport.Y = target.RenderHeight - viewport.Y - viewport.Height;
if (meta.Viewport != viewport)
{
GL.Viewport(viewport.X, viewport.Y, viewport.Width, viewport.Height);
meta.Viewport = viewport;
}
}
// we disable the scissor for clearing
meta.ForceScissorUpdate = true;
GL.Disable(GLEnum.SCISSOR_TEST);
// clear
var mask = GLEnum.ZERO;
if (flags.HasFlag(Framework.Clear.Color))
{
GL.ClearColor(color.R / 255f, color.G / 255f, color.B / 255f, color.A / 255f);
mask |= GLEnum.COLOR_BUFFER_BIT;
}
if (flags.HasFlag(Framework.Clear.Depth))
{
GL.ClearDepth(depth);
mask |= GLEnum.DEPTH_BUFFER_BIT;
}
if (flags.HasFlag(Framework.Clear.Stencil))
{
GL.ClearStencil(stencil);
mask |= GLEnum.STENCIL_BUFFER_BIT;
}
GL.Clear(mask);
GL.BindFramebuffer(GLEnum.FRAMEBUFFER, 0);
}
