コード例 #1
0
        protected NativeBitmapDataBase(Bitmap bitmap, PixelFormat pixelFormat, ImageLockMode lockMode, Color32 backColor, byte alphaThreshold, Palette?palette)
        {
            // It must be the same as bitmap format except if LockBits is not supported with the original pixel format (occurs on Linux).
            Debug.Assert(bitmap.PixelFormat == pixelFormat || !OSUtils.IsWindows, "Unmatching pixel format");

            // If palette is passed it must match with actual palette
            Debug.Assert(palette == null || palette.Equals(bitmap.Palette.Entries), "Unmatching palette");

            this.bitmap = bitmap;

            BackColor = pixelFormat.HasMultiLevelAlpha() ? default : backColor.ToOpaque();
                        AlphaThreshold = alphaThreshold;

                        bitmapData = bitmap.LockBits(new Rectangle(Point.Empty, bitmap.Size), lockMode, pixelFormat);
                        RowSize    = Math.Abs(bitmapData.Stride);

                        if (pixelFormat.IsIndexed())
                        {
                            Palette = palette ?? new Palette(bitmap.Palette.Entries, backColor.ToColor(), alphaThreshold);
                        }
        }