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using OpenTK.Graphics.OpenGL;
using Ryujinx.Graphics.GAL;
using System;
namespace Ryujinx.Graphics.OpenGL
{
class Window : IWindow
{
private const int NativeWidth = 1280;
private const int NativeHeight = 720;
private int _width;
private int _height;
private int _copyFramebufferHandle;
public Window()
{
_width = NativeWidth;
_height = NativeHeight;
}
public void Present(ITexture texture, ImageCrop crop)
{
TextureView view = (TextureView)texture;
GL.Disable(EnableCap.FramebufferSrgb);
int oldReadFramebufferHandle = GL.GetInteger(GetPName.ReadFramebufferBinding);
int oldDrawFramebufferHandle = GL.GetInteger(GetPName.DrawFramebufferBinding);
GL.BindFramebuffer(FramebufferTarget.DrawFramebuffer, 0);
GL.BindFramebuffer(FramebufferTarget.ReadFramebuffer, GetCopyFramebufferHandleLazy());
GL.FramebufferTexture(
FramebufferTarget.ReadFramebuffer,
FramebufferAttachment.ColorAttachment0,
view.Handle,
0);
GL.ReadBuffer(ReadBufferMode.ColorAttachment0);
GL.Clear(ClearBufferMask.ColorBufferBit);
int srcX0, srcX1, srcY0, srcY1;
if (crop.Left == 0 && crop.Right == 0)
{
srcX0 = 0;
srcX1 = view.Width;
}
else
{
srcX0 = crop.Left;
srcX1 = crop.Right;
}
if (crop.Top == 0 && crop.Bottom == 0)
{
srcY0 = 0;
srcY1 = view.Height;
}
else
{
srcY0 = crop.Top;
srcY1 = crop.Bottom;
}
float ratioX = MathF.Min(1f, (_height * (float)NativeWidth) / ((float)NativeHeight * _width));
float ratioY = MathF.Min(1f, (_width * (float)NativeHeight) / ((float)NativeWidth * _height));
int dstWidth = (int)(_width * ratioX);
int dstHeight = (int)(_height * ratioY);
int dstPaddingX = (_width - dstWidth) / 2;
int dstPaddingY = (_height - dstHeight) / 2;
int dstX0 = crop.FlipX ? _width - dstPaddingX : dstPaddingX;
int dstX1 = crop.FlipX ? dstPaddingX : _width - dstPaddingX;
int dstY0 = crop.FlipY ? dstPaddingY : _height - dstPaddingY;
int dstY1 = crop.FlipY ? _height - dstPaddingY : dstPaddingY;
GL.BlitFramebuffer(
srcX0,
srcY0,
srcX1,
srcY1,
dstX0,
dstY0,
dstX1,
dstY1,
ClearBufferMask.ColorBufferBit,
BlitFramebufferFilter.Linear);
GL.BindFramebuffer(FramebufferTarget.ReadFramebuffer, oldReadFramebufferHandle);
GL.BindFramebuffer(FramebufferTarget.DrawFramebuffer, oldDrawFramebufferHandle);
GL.Enable(EnableCap.FramebufferSrgb);
}
public void SetSize(int width, int height)
{
_width = width;
_height = height;
}
private int GetCopyFramebufferHandleLazy()
{
int handle = _copyFramebufferHandle;
if (handle == 0)
{
handle = GL.GenFramebuffer();
_copyFramebufferHandle = handle;
}
return handle;
}
}
}
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