/// <summary>
/// Sets the texture's data from managed memory.
/// </summary>
private unsafe void SetDataInternal <T>(Int32 level, Rectangle?rect, T[] data, Int32 startIndex, Int32 elementCount) where T : struct
{
var elementSizeInBytes = Marshal.SizeOf(typeof(T));
var region = rect ?? new Rectangle(0, 0, width, height);
var regionWidth = region.Width;
var regionHeight = region.Height;
var pixelSizeInBytes = (format == gl.GL_RGB || format == gl.GL_BGR) ? 3 : 4;
if (pixelSizeInBytes * width * height != elementSizeInBytes * elementCount)
{
throw new ArgumentException(UltravioletStrings.BufferIsWrongSize);
}
Ultraviolet.QueueWorkItem(state =>
{
var dataHandle = GCHandle.Alloc(data, GCHandleType.Pinned);
try
{
using (OpenGLState.ScopedBindTexture2D(OpenGLName))
{
var pData = dataHandle.AddrOfPinnedObject() + (startIndex * elementSizeInBytes);
gl.TextureSubImage2D(OpenGLName, gl.GL_TEXTURE_2D, level, region.X, region.Y,
region.Width, region.Height, format, type, (void *)pData);
gl.ThrowIfError();
}
}
finally { dataHandle.Free(); }
}, null, WorkItemOptions.ReturnNullOnSynchronousExecution)?.Wait();
}
/// <summary>
/// Processes a resize operation for this texture.
/// </summary>
private void ProcessResize()
{
using (OpenGLState.ScopedBindTexture2D(texture, true))
{
gl.TexImage2D(gl.GL_TEXTURE_2D, 0, (int)internalformat,
width, height, 0, format, type, null);
}
}
/// <summary>
/// Uploads texture data to the graphics device.
/// </summary>
private void Upload(Int32 level, Rectangle region, IntPtr ldata, Int32 offsetInBytes)
{
using (OpenGLState.ScopedBindTexture2D(OpenGLName))
{
var pData = ldata + offsetInBytes;
gl.TextureSubImage2D(OpenGLName, gl.GL_TEXTURE_2D, level, region.X, region.Y,
region.Width, region.Height, format, type, (void *)pData);
gl.ThrowIfError();
}
}
/// <summary>
/// Uploads texture data to the graphics device.
/// </summary>
private unsafe Task Upload(Int32 level, Rectangle region, IntPtr ldata, Int32 startIndex, Int32 elementSizeInBytes)
{
if (Ultraviolet.IsExecutingOnCurrentThread)
{
using (OpenGLState.ScopedBindTexture2D(OpenGLName))
{
var pData = ldata + (startIndex * elementSizeInBytes);
gl.TextureSubImage2D(OpenGLName, gl.GL_TEXTURE_2D, level, region.X, region.Y,
region.Width, region.Height, format, type, (void *)pData);
gl.ThrowIfError();
}
return(null);
}
else
{
return(Ultraviolet.QueueWorkItem(state =>
{
Upload(level, region, ldata, startIndex, elementSizeInBytes);
}));
}
}
/// <summary>
/// Creates the underlying native OpenGL texture with the specified format and data.
/// </summary>
/// <param name="uv">The Ultraviolet context.</param>
/// <param name="internalformat">The texture's internal format.</param>
/// <param name="width">The texture's width in pixels.</param>
/// <param name="height">The texture's height in pixels.</param>
/// <param name="format">The texel format.</param>
/// <param name="type">The texel data type.</param>
/// <param name="pixels">A pointer to the beginning of the texture's pixel data.</param>
/// <param name="immutable">A value indicating whether to use immutable texture storage.</param>
private void CreateNativeTexture(UltravioletContext uv, UInt32 internalformat, Int32 width, Int32 height, UInt32 format, UInt32 type, void *pixels, Boolean immutable)
{
if (uv.IsRunningInServiceMode)
{
throw new NotSupportedException(UltravioletStrings.NotSupportedInServiceMode);
}
this.width = width;
this.height = height;
this.internalformat = internalformat;
this.format = format;
this.type = type;
this.immutable = immutable;
this.srgbEncoded =
internalformat == gl.GL_SRGB ||
internalformat == gl.GL_SRGB_ALPHA ||
internalformat == gl.GL_SRGB8 ||
internalformat == gl.GL_SRGB8_ALPHA8;
this.texture = uv.QueueWorkItem(state =>
{
uint glname;
using (OpenGLState.ScopedCreateTexture2D(out glname))
{
if (gl.IsTextureMaxLevelSupported)
{
gl.TextureParameteri(glname, gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MAX_LEVEL, 0);
gl.ThrowIfError();
}
gl.TextureParameteri(glname, gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MIN_FILTER, (int)gl.GL_LINEAR);
gl.ThrowIfError();
gl.TextureParameteri(glname, gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MAG_FILTER, (int)gl.GL_LINEAR);
gl.ThrowIfError();
gl.TextureParameteri(glname, gl.GL_TEXTURE_2D, gl.GL_TEXTURE_WRAP_S, (int)gl.GL_CLAMP_TO_EDGE);
gl.ThrowIfError();
gl.TextureParameteri(glname, gl.GL_TEXTURE_2D, gl.GL_TEXTURE_WRAP_T, (int)gl.GL_CLAMP_TO_EDGE);
gl.ThrowIfError();
if (immutable)
{
if (gl.IsTextureStorageAvailable)
{
gl.TextureStorage2D(glname, gl.GL_TEXTURE_2D, 1, internalformat, width, height);
gl.ThrowIfError();
if (pixels != null)
{
gl.TextureSubImage2D(glname, gl.GL_TEXTURE_2D, 0, 0, 0, width, height, format, type, pixels);
gl.ThrowIfError();
}
}
else
{
gl.TextureImage2D(glname, gl.GL_TEXTURE_2D, 0, (int)internalformat, width, height, 0, format, type, pixels);
gl.ThrowIfError();
}
}
}
if (!immutable)
{
using (OpenGLState.ScopedBindTexture2D(glname, true))
{
gl.TexImage2D(gl.GL_TEXTURE_2D, 0, (int)internalformat, width, height, 0, format, type, pixels);
gl.ThrowIfError();
}
}
return(glname);
}).Result;
}
