public override void BufferSubData(
OpenGLDevice device,
OpenGLDevice.GLenum buffer, bool discard,
OpenGLDevice.IOpenGLBuffer handle,
int elementSizeInBytes, int offsetInBytes,
Array data, int startIndex, int elementCount
)
{
if (discard)
{
device.glBufferData(
OpenGLDevice.GLenum.GL_ELEMENT_ARRAY_BUFFER,
(IntPtr)handle.BufferSize,
IntPtr.Zero,
handle.Dynamic
);
}
GCHandle dataHandle = GCHandle.Alloc(data, GCHandleType.Pinned);
device.glBufferSubData(
OpenGLDevice.GLenum.GL_ELEMENT_ARRAY_BUFFER,
offsetInBytes,
elementSizeInBytes * elementCount,
(IntPtr)(dataHandle.AddrOfPinnedObject().ToInt64() + startIndex * elementSizeInBytes)
);
dataHandle.Free();
}
public abstract void BufferSubData(
OpenGLDevice device,
OpenGLDevice.GLenum buffer, bool discard,
OpenGLDevice.IOpenGLBuffer bufferHandle,
int elementSizeInBytes, int offsetInBytes,
Array data, int startIndex, int elementCount
);
public override void BufferSubData(
OpenGLDevice device,
OpenGLDevice.GLenum buffer, bool discard,
OpenGLDevice.IOpenGLBuffer handle,
int elementSizeInBytes, int offsetInBytes,
Array data, int startIndex, int elementCount
)
{
var gl = GetWebGLContext();
if (discard)
{
gl.bufferData(
(int)buffer,
handle.BufferSize,
(int)handle.Dynamic
);
}
var view = Verbatim.Expression("new Uint8Array($0.buffer, $1, $2)", data, offsetInBytes, elementSizeInBytes * elementCount);
gl.bufferSubData((int)buffer, startIndex, view);
}