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using OpenTK.Graphics.OpenGL;
using System;
namespace Ryujinx.Graphics.Gal.OpenGL
{
class ImageHandler
{
//TODO: Use a variable value here
public const int MaxBpp = 16;
private static int CopyBuffer = 0;
private static int CopyBufferSize = 0;
public GalImage Image { get; private set; }
public int Width => Image.Width;
public int Height => Image.Height;
public GalImageFormat Format => Image.Format;
public PixelInternalFormat InternalFormat { get; private set; }
public PixelFormat PixelFormat { get; private set; }
public PixelType PixelType { get; private set; }
public int Handle { get; private set; }
private bool Initialized;
public ImageHandler()
{
Handle = GL.GenTexture();
}
public ImageHandler(int Handle, GalImage Image)
{
this.Handle = Handle;
this.Image = Image;
}
public void EnsureSetup(GalImage Image)
{
if (Width != Image.Width ||
Height != Image.Height ||
Format != Image.Format ||
!Initialized)
{
(PixelInternalFormat InternalFormat, PixelFormat PixelFormat, PixelType PixelType) =
OGLEnumConverter.GetImageFormat(Image.Format);
GL.BindTexture(TextureTarget.Texture2D, Handle);
if (Initialized)
{
if (CopyBuffer == 0)
{
CopyBuffer = GL.GenBuffer();
}
int MaxWidth = Math.Max(Image.Width, Width);
int MaxHeight = Math.Max(Image.Height, Height);
int CurrentSize = MaxWidth * MaxHeight * MaxBpp;
GL.BindBuffer(BufferTarget.PixelPackBuffer, CopyBuffer);
GL.BindBuffer(BufferTarget.PixelUnpackBuffer, CopyBuffer);
if (CopyBufferSize < CurrentSize)
{
CopyBufferSize = CurrentSize;
GL.BufferData(BufferTarget.PixelPackBuffer, CurrentSize, IntPtr.Zero, BufferUsageHint.StreamCopy);
}
GL.GetTexImage(TextureTarget.Texture2D, 0, this.PixelFormat, this.PixelType, IntPtr.Zero);
GL.DeleteTexture(Handle);
Handle = GL.GenTexture();
GL.BindTexture(TextureTarget.Texture2D, Handle);
}
const int MinFilter = (int)TextureMinFilter.Linear;
const int MagFilter = (int)TextureMagFilter.Linear;
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, MinFilter);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, MagFilter);
const int Level = 0;
const int Border = 0;
GL.TexImage2D(
TextureTarget.Texture2D,
Level,
InternalFormat,
Image.Width,
Image.Height,
Border,
PixelFormat,
PixelType,
IntPtr.Zero);
if (Initialized)
{
GL.BindBuffer(BufferTarget.PixelPackBuffer, 0);
GL.BindBuffer(BufferTarget.PixelUnpackBuffer, 0);
}
this.Image = Image;
this.InternalFormat = InternalFormat;
this.PixelFormat = PixelFormat;
this.PixelType = PixelType;
Initialized = true;
}
}
public bool HasColor { get => ImageFormatConverter.HasColor(Format); }
public bool HasDepth { get => ImageFormatConverter.HasDepth(Format); }
public bool HasStencil { get => ImageFormatConverter.HasStencil(Format); }
}
}
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