示例#1
0
        public static GafImageInfo TrimImageInfo(GafImageInfo imageInfo, Rect rect)
        {
            var newData = new byte[rect.Width * rect.Height];

            for (var y = 0; y < rect.Height; ++y)
            {
                for (var x = 0; x < rect.Width; ++x)
                {
                    var sourceY = rect.Y + y;
                    var sourceX = rect.X + x;
                    newData[(y * rect.Width) + x] = imageInfo.Data[(sourceY * imageInfo.Width) + sourceX];
                }
            }
            return(new GafImageInfo
            {
                Data = newData,
                Width = rect.Width,
                Height = rect.Height,
                TransparencyIndex = imageInfo.TransparencyIndex
            });
        }
示例#2
0
        public static Rect ComputeMinBoundingRect(GafImageInfo imageInfo)
        {
            // FIXME: this will blow up if the image is entirely blank
            var top = Enumerable.Range(0, imageInfo.Height)
                      .First(y => Enumerable.Range(0, imageInfo.Width)
                             .Any(x => imageInfo.Data[(y * imageInfo.Width) + x] != imageInfo.TransparencyIndex));

            var left = Enumerable.Range(0, imageInfo.Width)
                       .First(x => Enumerable.Range(0, imageInfo.Height)
                              .Any(y => imageInfo.Data[(y * imageInfo.Width) + x] != imageInfo.TransparencyIndex));

            var bottom = BackwardsRange(0, imageInfo.Height)
                         .First(y => Enumerable.Range(0, imageInfo.Width)
                                .Any(x => imageInfo.Data[(y * imageInfo.Width) + x] != imageInfo.TransparencyIndex));

            var right = BackwardsRange(0, imageInfo.Width)
                        .First(x => Enumerable.Range(0, imageInfo.Height)
                               .Any(y => imageInfo.Data[(y * imageInfo.Width) + x] != imageInfo.TransparencyIndex));

            return(new Rect(left, top, right - left + 1, bottom - top + 1));
        }