Пример #1
0
        /*public void UpdateTexture(int textureName)
         * {
         *      GL.BindTexture(TextureTarget.Texture2D, textureName);
         *      PixelBufferImpl.CVPixelBufferLockBaseAddress(_handle, CVPixelBufferLockFlags.kCVPixelBufferLock_ReadOnly);
         *      GL.TexImage2D(
         *              TextureTarget.Texture2D,
         *              0,
         *              PixelInternalFormat.Rgba,
         *              Width,
         *              Height,
         *              0,
         *              PixelFormat.Bgra,
         *              PixelType.UnsignedByte,
         *              PixelBufferImpl.CVPixelBufferGetBaseAddress(_handle));
         *      PixelBufferImpl.CVPixelBufferUnlockBaseAddress(_handle, CVPixelBufferLockFlags.kCVPixelBufferLock_ReadOnly);
         * }*/

        public void UpdateTexture(int textureName, VideoHandle handle)
        {
            var width             = Width;
            var height            = Height;
            var bytesPerRow       = BytesPerRow;
            var actualBytesPerRow = width * 4;

            PixelBufferImpl.CVPixelBufferLockBaseAddress(_handle, CVPixelBufferLockFlags.kCVPixelBufferLock_ReadOnly);

            var baseAddress   = PixelBufferImpl.CVPixelBufferGetBaseAddress(_handle);
            var sourceAddress = baseAddress;
            var sourceOffset  = 0;
            var destOffset    = 0;

            for (int y = 0; y < height; y++)
            {
                sourceOffset  = y * bytesPerRow;
                destOffset    = y * actualBytesPerRow;
                sourceAddress = new IntPtr(baseAddress.ToInt64() + (Int64)sourceOffset);
                Marshal.Copy(sourceAddress, handle.Pixels, destOffset, actualBytesPerRow);
            }

            PixelBufferImpl.CVPixelBufferUnlockBaseAddress(_handle, CVPixelBufferLockFlags.kCVPixelBufferLock_ReadOnly);

            var pinnedArray = GCHandle.Alloc(handle.Pixels, GCHandleType.Pinned);

            _gl.BindTexture((int)TextureTarget.Texture2D, (int)textureName);
            if (width != handle.WidthCache || height != handle.HeightCache)
            {
                handle.WidthCache  = width;
                handle.HeightCache = height;
                _gl.TexImage2D(
                    (int)TextureTarget.Texture2D,
                    0,
                    (int)PixelInternalFormat.Rgba,
                    width,
                    height,
                    0,
                    (int)PixelFormat.Bgra,
                    (int)PixelType.UnsignedByte,
                    pinnedArray.AddrOfPinnedObject());
            }
            else
            {
                _gl.TexSubImage2D(
                    (int)TextureTarget.Texture2D,
                    0,
                    0,
                    0,
                    width,
                    height,
                    (int)PixelFormat.Bgra,
                    (int)PixelType.UnsignedByte,
                    pinnedArray.AddrOfPinnedObject());
            }

            pinnedArray.Free();
        }
Пример #2
0
 public static void BindTexture(GLTextureTarget target, GLTextureHandle texture)
 {
     _gl.BindTexture(target, texture);
 }
Пример #3
0
        public void UpdateTexture(int textureHandle)
        {
            if (Width > 0 && Height > 0)
            {
                using (var dc = _drawingVisual.RenderOpen())
                    dc.DrawVideo(_mediaPlayer, new System.Windows.Rect(0, 0, Width, Height));

                if (_renderTargetBitmap == null || (_widthCache != Width || _heightCache != Height))
                {
                    _renderTargetBitmap = new RenderTargetBitmap(Width, Height, 100, 100, PixelFormats.Pbgra32);
                }

                _renderTargetBitmap.Render(_drawingVisual);

                var stride = _renderTargetBitmap.PixelWidth * 4;
                var size   = _renderTargetBitmap.PixelHeight * stride;

                if (_pixelBuffer == null || _pixelBuffer.Length != size)
                {
                    _pixelBuffer = new byte[size];
                }

                var pinnedBuffer = GCHandle.Alloc(_pixelBuffer, GCHandleType.Pinned);

                try
                {
                    var pixelBufferPtr = pinnedBuffer.AddrOfPinnedObject();

                    _renderTargetBitmap.CopyPixels(Int32Rect.Empty, pixelBufferPtr, size, stride);


                    _gl.BindTexture((int)TextureTarget.Texture2D, (int)textureHandle);

                    if (_widthCache != Width || _heightCache != Height || _lastTextureHandle != textureHandle)
                    {
                        _widthCache        = Width;
                        _heightCache       = Height;
                        _lastTextureHandle = textureHandle;

                        _gl.TexImage2D(
                            (int)TextureTarget.Texture2D,
                            0,
                            (int)PixelFormat.Bgra,
                            Width,
                            Height,
                            0,
                            (int)PixelFormat.Bgra,
                            (int)PixelType.UnsignedByte,
                            pixelBufferPtr);
                    }
                    else
                    {
                        _gl.TexSubImage2D(
                            (int)TextureTarget.Texture2D,
                            0,
                            0,
                            0,
                            Width,
                            Height,
                            (int)PixelFormat.Bgra,
                            (int)PixelType.UnsignedByte,
                            pixelBufferPtr);
                    }
                }
                finally
                {
                    pinnedBuffer.Free();
                }
            }
        }