public AsyncTextureReader(RenderTexture texture)
{
Status = AsyncTextureReaderStatus.Idle;
Texture = texture;
// WARNING - if you change this, you'll need to update code below
Debug.Assert(
texture.format == RenderTextureFormat.ARGBFloat ||
texture.format == RenderTextureFormat.RGFloat ||
texture.format == RenderTextureFormat.RFloat ||
texture.format == RenderTextureFormat.ARGB32);
Debug.Assert(texture.dimension == TextureDimension.Tex2D);
var sync = System.Environment.GetEnvironmentVariable("FORCE_SYNC_GPU_READBACK");
if (sync == null)
{
if (SystemInfo.supportsAsyncGPUReadback)
{
int length;
Type = ReadType.Native;
if (texture.format == RenderTextureFormat.ARGBFloat)
{
BytesPerPixel = 16;
NativeReadFormat = TextureFormat.RGBAFloat;
length = Texture.width * Texture.height;
}
else if (texture.format == RenderTextureFormat.RGFloat)
{
BytesPerPixel = 8;
NativeReadFormat = TextureFormat.RGFloat;
length = Texture.width * Texture.height;
}
else if (texture.format == RenderTextureFormat.RFloat)
{
BytesPerPixel = 4;
NativeReadFormat = TextureFormat.RFloat;
length = Texture.width * Texture.height;
}
else // if (texture.format == RenderTextureFormat.ARGB32)
{
BytesPerPixel = 3;
NativeReadFormat = TextureFormat.RGB24;
length = Texture.width * Texture.height * BytesPerPixel;
}
Data = new NativeArray <T>(length, Allocator.Persistent, NativeArrayOptions.UninitializedMemory);
return;
}
if (SystemInfo.graphicsDeviceType == GraphicsDeviceType.OpenGLCore &&
SystemInfo.operatingSystemFamily == OperatingSystemFamily.Linux)
{
var version = SystemInfo.graphicsDeviceVersion;
version = version.Split(new char[] { ' ' }, 3)[1];
var parts = version.Split(new char[] { '.' });
int major = int.Parse(parts[0]);
int minor = int.Parse(parts[1]);
//Debug.Log($"OpenGL version = {major}.{minor}");
if (major > 3 || major == 3 && minor >= 2) // GL_ARB_sync
{
debug = new DebugDelegate(DebugCallback);
AsyncTextureReaderImports.AsyncTextureReaderSetDebug(Marshal.GetFunctionPointerForDelegate(debug));
int length;
if (texture.format == RenderTextureFormat.ARGBFloat)
{
BytesPerPixel = 16;
length = Texture.width * Texture.height;
}
else if (texture.format == RenderTextureFormat.RGFloat)
{
BytesPerPixel = 8;
length = Texture.width * Texture.height;
}
else if (texture.format == RenderTextureFormat.RFloat)
{
BytesPerPixel = 4;
length = Texture.width * Texture.height;
}
else // if (texture.format == RenderTextureFormat.ARGB32)
{
BytesPerPixel = 4;
length = Texture.width * Texture.height * BytesPerPixel;
}
texture.Create();
Data = new NativeArray <T>(length, Allocator.Persistent, NativeArrayOptions.UninitializedMemory);
LinuxId = AsyncTextureReaderImports.AsyncTextureReaderCreate(texture.GetNativeTexturePtr(), Data.Length);
if (LinuxId >= 0)
{
LinuxUpdate = AsyncTextureReaderImports.AsyncTextureReaderGetUpdate();
GL.IssuePluginEvent(LinuxUpdate, LinuxId);
Type = ReadType.LinuxOpenGL;
}
else
{
Debug.Log("ERROR: failed to create native AsyncTextureReader");
}
return;
}
}
}
if (texture.format != RenderTextureFormat.ARGB32)
{
Debug.Log("ERROR: fallback AsyncTextureReader supports only ARGB32 texture format");
Type = ReadType.None;
return;
}
Type = ReadType.Sync;
BytesPerPixel = 3;
Data = new NativeArray <T>(texture.width * texture.height * BytesPerPixel, Allocator.Persistent, NativeArrayOptions.UninitializedMemory);
ReadTexture = new Texture2D(texture.width, texture.height, TextureFormat.RGB24, false);
}
public AsyncTextureReader(RenderTexture texture)
{
Status = AsyncTextureReaderStatus.Idle;
Texture = texture;
// WARNING - if you change this, you'll need to update code below
Debug.Assert(
texture.format == RenderTextureFormat.ARGBFloat ||
texture.format == RenderTextureFormat.RGFloat ||
texture.format == RenderTextureFormat.RFloat ||
texture.format == RenderTextureFormat.ARGB32);
Debug.Assert(texture.dimension == TextureDimension.Tex2D);
var sync = System.Environment.GetEnvironmentVariable("FORCE_SYNC_GPU_READBACK");
if (sync == null)
{
if (SystemInfo.supportsAsyncGPUReadback)
{
Type = ReadType.Native;
if (texture.format == RenderTextureFormat.ARGBFloat)
{
BytesPerPixel = 16;
NativeReadFormat = TextureFormat.RGBAFloat;
ElementCount = Texture.width * Texture.height;
SizeInBytes = ElementCount * BytesPerPixel;
}
else if (texture.format == RenderTextureFormat.RGFloat)
{
BytesPerPixel = 8;
NativeReadFormat = TextureFormat.RGFloat;
ElementCount = Texture.width * Texture.height;
SizeInBytes = ElementCount * BytesPerPixel;
}
else if (texture.format == RenderTextureFormat.RFloat)
{
BytesPerPixel = 4;
NativeReadFormat = TextureFormat.RFloat;
ElementCount = Texture.width * Texture.height;
SizeInBytes = ElementCount * BytesPerPixel;
}
else // if (texture.format == RenderTextureFormat.ARGB32)
{
BytesPerPixel = 3;
NativeReadFormat = TextureFormat.RGB24;
ElementCount = Texture.width * Texture.height * BytesPerPixel;
SizeInBytes = ElementCount;
}
Data = new T[ElementCount];
return;
}
if (SystemInfo.graphicsDeviceType == GraphicsDeviceType.OpenGLCore &&
SystemInfo.operatingSystemFamily == OperatingSystemFamily.Linux)
{
var version = SystemInfo.graphicsDeviceVersion;
version = version.Split(new char[] { ' ' }, 3)[1];
var parts = version.Split(new char[] { '.' });
int major = int.Parse(parts[0]);
int minor = int.Parse(parts[1]);
//Debug.Log($"OpenGL version = {major}.{minor}");
// OpenGL extensions required:
// ARB_buffer_storage (from 4.4)
// ARB_shader_image_load_store (from 4.2)
// ARB_sync (from 3.2)
if (major > 4 || major == 4 && minor >= 4)
{
debug = new DebugDelegate(DebugCallback);
AsyncTextureReaderImports.AsyncTextureReaderSetDebug(Marshal.GetFunctionPointerForDelegate(debug));
if (texture.format == RenderTextureFormat.ARGBFloat)
{
BytesPerPixel = 16;
ElementCount = Texture.width * Texture.height;
SizeInBytes = ElementCount * BytesPerPixel;
}
else if (texture.format == RenderTextureFormat.RGFloat)
{
BytesPerPixel = 8;
ElementCount = Texture.width * Texture.height;
SizeInBytes = ElementCount * BytesPerPixel;
}
else if (texture.format == RenderTextureFormat.RFloat)
{
BytesPerPixel = 4;
ElementCount = Texture.width * Texture.height;
SizeInBytes = ElementCount * BytesPerPixel;
}
else // if (texture.format == RenderTextureFormat.ARGB32)
{
BytesPerPixel = 4;
ElementCount = Texture.width * Texture.height * BytesPerPixel;
SizeInBytes = ElementCount;
}
Data = new T[ElementCount];
texture.Create();
LinuxId = AsyncTextureReaderImports.AsyncTextureReaderCreate(texture.GetNativeTexturePtr(), SizeInBytes);
if (LinuxId >= 0)
{
LinuxUpdate = AsyncTextureReaderImports.AsyncTextureReaderGetUpdate();
GL.IssuePluginEvent(LinuxUpdate, LinuxId);
Type = ReadType.LinuxOpenGL;
}
else
{
Debug.Log("ERROR: failed to create native AsyncTextureReader");
}
return;
}
}
}
if (texture.format != RenderTextureFormat.ARGB32)
{
Debug.Log("ERROR: fallback AsyncTextureReader supports only ARGB32 texture format");
Type = ReadType.None;
return;
}
Type = ReadType.Sync;
BytesPerPixel = 3;
ElementCount = Texture.width * Texture.height * BytesPerPixel;
SizeInBytes = ElementCount;
Data = new T[ElementCount];
ReadTexture = new Texture2D(texture.width, texture.height, TextureFormat.RGB24, false);
}