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using ChocolArm64.Memory;
using Ryujinx.Graphics.Gal;
using System;
namespace Ryujinx.Graphics.Gpu
{
static class TextureReader
{
public static byte[] Read(AMemory Memory, Texture Texture)
{
switch (Texture.Format)
{
case GalTextureFormat.A8B8G8R8: return Read4Bpp (Memory, Texture);
case GalTextureFormat.BC1: return Read8Bpt4x4 (Memory, Texture);
case GalTextureFormat.BC2: return Read16Bpt4x4(Memory, Texture);
case GalTextureFormat.BC3: return Read16Bpt4x4(Memory, Texture);
}
throw new NotImplementedException(Texture.Format.ToString());
}
private unsafe static byte[] Read4Bpp(AMemory Memory, Texture Texture)
{
int Width = Texture.Width;
int Height = Texture.Height;
byte[] Output = new byte[Width * Height * 4];
ISwizzle Swizzle = GetSwizzle(Texture, 4);
fixed (byte* BuffPtr = Output)
{
long OutOffs = 0;
for (int Y = 0; Y < Height; Y++)
for (int X = 0; X < Width; X++)
{
long Offset = (uint)Swizzle.GetSwizzleOffset(X, Y);
int Pixel = Memory.ReadInt32Unchecked(Texture.Position + Offset);
*(int*)(BuffPtr + OutOffs) = Pixel;
OutOffs += 4;
}
}
return Output;
}
private unsafe static byte[] Read8Bpt4x4(AMemory Memory, Texture Texture)
{
int Width = (Texture.Width + 3) / 4;
int Height = (Texture.Height + 3) / 4;
byte[] Output = new byte[Width * Height * 8];
ISwizzle Swizzle = GetSwizzle(Texture, 8);
fixed (byte* BuffPtr = Output)
{
long OutOffs = 0;
for (int Y = 0; Y < Height; Y++)
for (int X = 0; X < Width; X++)
{
long Offset = (uint)Swizzle.GetSwizzleOffset(X, Y);
long Tile = Memory.ReadInt64Unchecked(Texture.Position + Offset);
*(long*)(BuffPtr + OutOffs) = Tile;
OutOffs += 8;
}
}
return Output;
}
private unsafe static byte[] Read16Bpt4x4(AMemory Memory, Texture Texture)
{
int Width = (Texture.Width + 3) / 4;
int Height = (Texture.Height + 3) / 4;
byte[] Output = new byte[Width * Height * 16];
ISwizzle Swizzle = GetSwizzle(Texture, 16);
fixed (byte* BuffPtr = Output)
{
long OutOffs = 0;
for (int Y = 0; Y < Height; Y++)
for (int X = 0; X < Width; X++)
{
long Offset = (uint)Swizzle.GetSwizzleOffset(X, Y);
long Tile0 = Memory.ReadInt64Unchecked(Texture.Position + Offset + 0);
long Tile1 = Memory.ReadInt64Unchecked(Texture.Position + Offset + 8);
*(long*)(BuffPtr + OutOffs + 0) = Tile0;
*(long*)(BuffPtr + OutOffs + 8) = Tile1;
OutOffs += 16;
}
}
return Output;
}
private static ISwizzle GetSwizzle(Texture Texture, int Bpp)
{
switch (Texture.Swizzle)
{
case TextureSwizzle.Pitch:
case TextureSwizzle.PitchColorKey:
return new LinearSwizzle(Texture.Pitch, Bpp);
case TextureSwizzle.BlockLinear:
case TextureSwizzle.BlockLinearColorKey:
return new BlockLinearSwizzle(Texture.Width, Bpp, Texture.BlockHeight);
}
throw new NotImplementedException(Texture.Swizzle.ToString());
}
}
}
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