public unsafe void LoadData(IntPtr data, int size)
{
if (size < 0)
{
throw new ArgumentException("Size cannot be less than zero.");
}
NativeGraphicsBuffer prevBound = GetBound(this.type);
Bind(this.type, this);
uint target = ToOpenTKBufferType(this.type);
if (data == IntPtr.Zero || size == 0)
{
// ToDo
//GraphicsBackend.GL.BufferData(target, null, WebGLRenderingContextBase.STREAM_DRAW);
}
else
{
GraphicsBackend.GL.BufferData(target, TypedArray <Uint8ClampedArray, byte> .From(new Span <byte>(data.ToPointer(), size)), WebGLRenderingContextBase.STREAM_DRAW);
}
this.bufferSize = size;
Bind(this.type, prevBound);
}
public unsafe void LoadSubData(IntPtr offset, IntPtr data, int size)
{
if (size < 0)
{
throw new ArgumentException("Size cannot be less than zero.");
}
if (this.bufferSize == 0)
{
throw new InvalidOperationException(string.Format(
"Cannot update {0}, because its storage was not initialized yet.",
typeof(NativeGraphicsBuffer).Name));
}
if ((uint)offset + size > this.bufferSize)
{
throw new ArgumentException(string.Format(
"Cannot update {0} with offset {1} and size {2}, as this exceeds the internal " +
"storage size {3}.",
typeof(NativeGraphicsBuffer).Name,
offset,
size,
this.bufferSize));
}
NativeGraphicsBuffer prevBound = GetBound(this.type);
Bind(this.type, this);
uint target = ToOpenTKBufferType(this.type);
GraphicsBackend.GL.BufferSubData(target, (uint)offset, TypedArray <Uint8ClampedArray, byte> .From(new Span <byte>(data.ToPointer(), size)));
Bind(this.type, prevBound);
}
unsafe void INativeTexture.LoadData(TexturePixelFormat format, int width, int height, IntPtr data, ColorDataLayout dataLayout, ColorDataElementType dataElementType)
{
// Removed thread guards because of performance
//DefaultOpenTKBackendPlugin.GuardSingleThreadState();
WebGLTexture lastTexId = (WebGLTexture)GraphicsBackend.GL.GetParameter(WebGLRenderingContextBase.TEXTURE_BINDING_2D);
GraphicsBackend.GL.BindTexture(WebGLRenderingContextBase.TEXTURE_2D, this.handle);
// Load pixel data to video memory
GraphicsBackend.GL.TexImage2D(WebGLRenderingContextBase.TEXTURE_2D, 0,
ToOpenTKPixelInternalFormat(format), width, height, 0,
dataLayout.ToOpenTK(), dataElementType.ToOpenTK(),
TypedArray <Uint8ClampedArray, byte> .From(new Span <byte>(data.ToPointer(), /*ToDo*/ (width * height * 4))));
GraphicsBackend.GL.GenerateMipmap(WebGLRenderingContextBase.TEXTURE_2D);
this.width = width;
this.height = height;
this.format = format;
GraphicsBackend.GL.BindTexture(WebGLRenderingContextBase.TEXTURE_2D, lastTexId);
}
void IGraphicsBackend.GetOutputPixelData(IntPtr buffer, ColorDataLayout dataLayout, ColorDataElementType dataElementType, int x, int y, int width, int height)
{
NativeRenderTarget lastRt = NativeRenderTarget.BoundRT;
NativeRenderTarget.Bind(null);
{
// Use a temporary local buffer, since the image will be upside-down because
// of OpenGL's coordinate system and we'll need to flip it before returning.
byte[] byteData = new byte[width * height * 4];
// Retrieve pixel data
GL.ReadPixels(x, y, width, height, dataLayout.ToOpenTK(), dataElementType.ToOpenTK(), TypedArray <Uint8ClampedArray, byte> .From(new Span <byte>(byteData)));
// Flip the retrieved image vertically
int bytesPerLine = width * 4;
byte[] switchLine = new byte[width * 4];
for (int flipY = 0; flipY < height / 2; flipY++)
{
int lineIndex = flipY * width * 4;
int lineIndex2 = (height - 1 - flipY) * width * 4;
// Copy the current line to the switch buffer
for (int lineX = 0; lineX < bytesPerLine; lineX++)
{
switchLine[lineX] = byteData[lineIndex + lineX];
}
// Copy the opposite line to the current line
for (int lineX = 0; lineX < bytesPerLine; lineX++)
{
byteData[lineIndex + lineX] = byteData[lineIndex2 + lineX];
}
// Copy the switch buffer to the opposite line
for (int lineX = 0; lineX < bytesPerLine; lineX++)
{
byteData[lineIndex2 + lineX] = switchLine[lineX];
}
}
// Copy the flipped data to the output buffer
Marshal.Copy(byteData, 0, buffer, width * height * 4);
}
NativeRenderTarget.Bind(lastRt);
}
