private RenderTarget CreateRenderTarget(Vector2i size, RenderTargetColorFormat colorFormat,
TextureSampleParameters?sampleParameters = null, string name = null)
{
// Generate color attachment texture.
var texture = new OGLHandle(GL.GenTexture());
GL.BindTexture(TextureTarget.Texture2D, texture.Handle);
_applySampleParameters(sampleParameters);
var internalFormat = colorFormat switch
{
RenderTargetColorFormat.Rgba8 => PixelInternalFormat.Rgba8,
RenderTargetColorFormat.Rgba16F => PixelInternalFormat.Rgba16f,
RenderTargetColorFormat.Rgba8Srgb => PixelInternalFormat.Srgb8Alpha8,
RenderTargetColorFormat.R11FG11FB10F => PixelInternalFormat.R11fG11fB10f,
_ => throw new ArgumentOutOfRangeException(nameof(colorFormat), colorFormat, null)
};
var(width, height) = size;
GL.TexImage2D(TextureTarget.Texture2D, 0, internalFormat, width, height, 0, PixelFormat.Red,
PixelType.Byte, IntPtr.Zero);
// Generate FBO.
var fbo = new OGLHandle(GL.GenFramebuffer());
// Cache currently bound framebuffers
// so if somebody creates a framebuffer while drawing it won't ruin everything.
var boundDrawBuffer = GL.GetInteger(GetPName.DrawFramebufferBinding);
var boundReadBuffer = GL.GetInteger(GetPName.ReadFramebufferBinding);
// Bind color attachment to FBO.
GL.BindFramebuffer(FramebufferTarget.Framebuffer, fbo.Handle);
GL.FramebufferTexture(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, texture.Handle,
0);
// This should always pass but OpenGL makes it easy to check for once so let's.
var status = GL.CheckFramebufferStatus(FramebufferTarget.Framebuffer);
DebugTools.Assert(status == FramebufferErrorCode.FramebufferComplete,
$"new framebuffer has bad status {status}");
// Re-bind previous framebuffers.
GL.BindFramebuffer(FramebufferTarget.DrawFramebuffer, boundDrawBuffer);
GL.BindFramebuffer(FramebufferTarget.ReadFramebuffer, boundReadBuffer);
var textureObject = _genTexture(texture, size, name);
var handle = AllocRid();
var renderTarget = new RenderTarget(size, textureObject, fbo, this, handle);
_renderTargets.Add(handle, renderTarget);
return(renderTarget);
}
public IRenderTarget CreateRenderTarget(Vector2i size, RenderTargetColorFormat colorFormat,
TextureSampleParameters?sampleParameters = null, string name = null)
{
return(new DummyRenderTarget(size, new DummyTexture(size)));
}
IRenderTarget IClyde.CreateRenderTarget(Vector2i size, RenderTargetColorFormat colorFormat,
TextureSampleParameters?sampleParameters, string name)
{
return(CreateRenderTarget(size, colorFormat, sampleParameters, name));
}
public RenderTargetFormatParameters(RenderTargetColorFormat colorFormat, bool hasDepthStencil = false)
{
ColorFormat = colorFormat;
HasDepthStencil = hasDepthStencil;
}
