Exemplo n.º 1
0
        /// <summary>
        /// Invoke <see cref="JpegBlockPostProcessor"/> for <see cref="BlockRowsPerStep"/> block rows, copy the result into <see cref="ColorBuffer"/>.
        /// </summary>
        public void CopyBlocksToColorBuffer()
        {
            var blockPp = new JpegBlockPostProcessor(this.ImagePostProcessor.RawJpeg, this.Component);

            for (int y = 0; y < this.BlockRowsPerStep; y++)
            {
                int yBlock = this.currentComponentRowInBlocks + y;

                if (yBlock >= this.SizeInBlocks.Height)
                {
                    break;
                }

                int yBuffer = y * this.blockAreaSize.Height;

                Span <Block8x8> blockRow = this.Component.SpectralBlocks.GetRowSpan(yBlock);

                ref Block8x8 blockRowBase = ref MemoryMarshal.GetReference(blockRow);

                for (int xBlock = 0; xBlock < this.SizeInBlocks.Width; xBlock++)
                {
                    ref Block8x8 block   = ref Unsafe.Add(ref blockRowBase, xBlock);
                    int          xBuffer = xBlock * this.blockAreaSize.Width;

                    BufferArea <float> destArea = this.ColorBuffer.GetArea(
                        xBuffer,
                        yBuffer,
                        this.blockAreaSize.Width,
                        this.blockAreaSize.Height);

                    blockPp.ProcessBlockColorsInto(ref block, destArea);
                }
        /// <summary>
        /// Invoke <see cref="JpegBlockPostProcessor"/> for <see cref="BlockRowsPerStep"/> block rows, copy the result into <see cref="ColorBuffer"/>.
        /// </summary>
        public void CopyBlocksToColorBuffer()
        {
            var blockPp = new JpegBlockPostProcessor(this.ImagePostProcessor.RawJpeg, this.Component);

            for (int y = 0; y < this.BlockRowsPerStep; y++)
            {
                int yBlock = this.currentComponentRowInBlocks + y;

                if (yBlock >= this.SizeInBlocks.Height)
                {
                    break;
                }

                int yBuffer = y * this.blockAreaSize.Height;

                for (int x = 0; x < this.SizeInBlocks.Width; x++)
                {
                    int xBlock  = x;
                    int xBuffer = x * this.blockAreaSize.Width;

                    ref Block8x8 block = ref this.Component.GetBlockReference(xBlock, yBlock);

                    BufferArea <float> destArea = this.ColorBuffer.GetArea(
                        xBuffer,
                        yBuffer,
                        this.blockAreaSize.Width,
                        this.blockAreaSize.Height);

                    blockPp.ProcessBlockColorsInto(ref block, destArea);
                }
            }
Exemplo n.º 3
0
        /// <summary>
        /// Invoke <see cref="JpegBlockPostProcessor"/> for <see cref="BlockRowsPerStep"/> block rows, copy the result into <see cref="ColorBuffer"/>.
        /// </summary>
        public void CopyBlocksToColorBuffer()
        {
            var   blockPp      = new JpegBlockPostProcessor(this.ImagePostProcessor.RawJpeg, this.Component);
            float maximumValue = MathF.Pow(2, this.ImagePostProcessor.RawJpeg.Precision) - 1;

            int destAreaStride = this.ColorBuffer.Width;

            for (int y = 0; y < this.BlockRowsPerStep; y++)
            {
                int yBlock = this.currentComponentRowInBlocks + y;

                if (yBlock >= this.SizeInBlocks.Height)
                {
                    break;
                }

                int yBuffer = y * this.blockAreaSize.Height;

                Span <float>    colorBufferRow = this.ColorBuffer.GetRowSpan(yBuffer);
                Span <Block8x8> blockRow       = this.Component.SpectralBlocks.GetRowSpan(yBlock);

                // see: https://github.com/SixLabors/ImageSharp/issues/824
                int widthInBlocks = Math.Min(this.Component.SpectralBlocks.Width, this.SizeInBlocks.Width);

                for (int xBlock = 0; xBlock < widthInBlocks; xBlock++)
                {
                    ref Block8x8 block          = ref blockRow[xBlock];
                    int          xBuffer        = xBlock * this.blockAreaSize.Width;
                    ref float    destAreaOrigin = ref colorBufferRow[xBuffer];

                    blockPp.ProcessBlockColorsInto(ref block, ref destAreaOrigin, destAreaStride, maximumValue);
                }
        /// <summary>
        /// Invoke <see cref="JpegBlockPostProcessor"/> for <see cref="BlockRowsPerStep"/> block rows, copy the result into <see cref="ColorBuffer"/>.
        /// </summary>
        public void CopyBlocksToColorBuffer(int step)
        {
            Buffer2D <Block8x8> spectralBuffer = this.Component.SpectralBlocks;

            var blockPp = new JpegBlockPostProcessor(this.RawJpeg, this.Component);

            float maximumValue = this.frame.MaxColorChannelValue;

            int destAreaStride = this.ColorBuffer.Width;

            int yBlockStart = step * this.BlockRowsPerStep;

            for (int y = 0; y < this.BlockRowsPerStep; y++)
            {
                int yBlock = yBlockStart + y;

                if (yBlock >= spectralBuffer.Height)
                {
                    break;
                }

                int yBuffer = y * this.blockAreaSize.Height;

                Span <float>    colorBufferRow = this.ColorBuffer.GetRowSpan(yBuffer);
                Span <Block8x8> blockRow       = spectralBuffer.GetRowSpan(yBlock);

                // see: https://github.com/SixLabors/ImageSharp/issues/824
                int widthInBlocks = Math.Min(spectralBuffer.Width, this.SizeInBlocks.Width);

                for (int xBlock = 0; xBlock < widthInBlocks; xBlock++)
                {
                    ref Block8x8 block          = ref blockRow[xBlock];
                    int          xBuffer        = xBlock * this.blockAreaSize.Width;
                    ref float    destAreaOrigin = ref colorBufferRow[xBuffer];

                    blockPp.ProcessBlockColorsInto(ref block, ref destAreaOrigin, destAreaStride, maximumValue);
                }