Beispiel #1
0
        /// <summary>
        ///
        /// </summary>
        /// <param name="stream"></param>
        /// <param name="destFilePath"></param>
        /// <param name="destFileName"></param>
        /// <param name="cropOptions"></param>
        /// <param name="resizeOptions"></param>
        /// <param name="compressOptions"></param>
        public void ProcessAndSaveImageFromStream(Stream stream, string destFilePath, string destFileName,
                                                  ImageCropOpts cropOptions, ImageResizeOpts resizeOptions, ImageCrompressOpts compressOptions, ImageCropOpts maxDimensionsAftersize)
        {
            stream.Seek(0, SeekOrigin.Begin);

            using (var image = Image.FromStream(stream))
            {
                //-- Set the processed image to the original image incase we don't apply any cropping or resizing we'll save the image as is.
                Image processedImg = image;
                if (cropOptions != null)
                {
                    processedImg = ImageCropper.Crop(processedImg, cropOptions);
                }
                if (resizeOptions != null)
                {
                    processedImg = ImageResizer.ResizeImage(processedImg, resizeOptions);
                }

                //-- Clip the width or height if it's still too large after resized
                if (maxDimensionsAftersize != null)
                {
                    if ((maxDimensionsAftersize.W != 0) && (processedImg.Width > maxDimensionsAftersize.W))
                    {
                        var widthCropOptions = new ImageCropOpts(0, 0, maxDimensionsAftersize.W, processedImg.Height);
                        processedImg = ImageCropper.Crop(processedImg, widthCropOptions);
                    }
                    if ((maxDimensionsAftersize.H != 0) && (processedImg.Height > maxDimensionsAftersize.H))
                    {
                        var heightCropOptions = new ImageCropOpts(0, 0, processedImg.Width, maxDimensionsAftersize.H);
                        processedImg = ImageCropper.Crop(processedImg, heightCropOptions);
                    }
                }

                //-- TODO: think about putting in a max dimensions crop, where if an image is resized by exact width or height, we clip
                //-- the corresponding height or width
                //if (maxDimensionsAftersize != null) { }

                using (var compressedImgStream = ImageCompressor.CompressImage(processedImg, compressOptions))
                {
                    //-- If there's been no cropping or resizing & the original image size is small enough
                    //-- then we're going to save the original stream to avoid image quality degradation
                    if (processedImg.Height == image.Height && processedImg.Width == processedImg.Width)
                    {
                        bool originalImageSizeUnderThreshold = (stream.Length < compressOptions.OriginalByteLengthThreshold);

                        //-- If it's under the threshold then we just use the original image would compounding the compression
                        if (originalImageSizeUnderThreshold)
                        {
                            stream.CopyTo(compressedImgStream); //http://stackoverflow.com/questions/230128/best-way-to-copy-between-two-stream-instances-c-sharp
                            stream.Position = compressedImgStream.Position = 0;

                            ImagePersister.SaveImage(compressedImgStream, destFilePath, destFileName);
                            return;
                        }
                    }

                    ImagePersister.SaveImage(compressedImgStream, destFilePath, destFileName);
                }
            }
        }
Beispiel #2
0
        /// <summary>
        /// Save a thumbnail of an image with x/y dimensions specified by thumbW & thumbH
        /// </summary>
        /// <param name="stream"></param>
        /// <param name="destFilePath"></param>
        /// <param name="destFileName"></param>
        /// <param name="thumbW"></param>
        /// <param name="thumbH"></param>
        /// <param name="x"></param>
        /// <param name="y"></param>
        /// <param name="compressOptions"></param>
        private void SaveThumbImageWithResizeThenCrop(Stream stream, string destFilePath, string destFileName, int thumbW, int thumbH,
                                                      ImageCropOpts cropOpts, ImageCrompressOpts compressOptions)
        {
            var             thumbPixelBuffer = 0;
            ImageResizeOpts resizeOpts       = new ImageResizeOpts()
            {
                Mode = ResizeMode.ShrinkOnly, Height = thumbW + thumbPixelBuffer, Width = thumbH + thumbPixelBuffer
            };

            stream.Seek(0, SeekOrigin.Begin);
            using (var image = Image.FromStream(stream))
            {
                //-- Set the processed image to the original image incase we don't apply any cropping or resizing we'll save the image as is.
                Image processedImg = image;

                //-- Do the initial crop
                if (cropOpts != null)
                {
                    processedImg = ImageCropper.Crop(image, cropOpts);
                }

                //-- If our cropped image dimensions are bigger than the Thumb buffer dimensions
                if (processedImg.Width > resizeOpts.Width && processedImg.Height > resizeOpts.Height)
                {
                    processedImg = ImageResizer.ResizeImage(processedImg, resizeOpts);
                }

                //-- In case the image width is smaller than the desired thumb width, we enlarge it
                if (processedImg.Width < thumbW)
                {
                    //-- If the image is smaller we first enlarge the image based of width, if the height is still to small we enlarge it again
                    var enlargeWidthOptions = new ImageResizeOpts()
                    {
                        Mode = ResizeMode.ExactWidth, Height = 0, Width = thumbH
                    };

                    //-- First try the width
                    processedImg = ImageResizer.ResizeImage(processedImg, enlargeWidthOptions);
                }

                //-- In case the image height is smaller than the desired Thumb height, we enlarge it
                if (processedImg.Height < thumbH)
                {
                    ImageResizeOpts enlargeHeightOptions = new ImageResizeOpts()
                    {
                        Mode = ResizeMode.ExactHeight, Height = thumbW, Width = 0
                    };
                    processedImg = ImageResizer.ResizeImage(processedImg, enlargeHeightOptions);
                }

                //-- If needed, crop the width to be exact
                if (processedImg.Width > thumbW)
                {
                    var widthCropOptions = new ImageCropOpts(0, 0, thumbW, processedImg.Height);
                    processedImg = ImageCropper.Crop(processedImg, widthCropOptions);
                }

                //-- If needed, crop the height to be exact
                if (processedImg.Height > thumbH)
                {
                    var heightCropOptions = new ImageCropOpts(0, 0, processedImg.Width, thumbH);
                    processedImg = ImageCropper.Crop(processedImg, heightCropOptions);
                }

                //-- Save the thumb compressed heavily
                using (var compressedImage = ImageCompressor.CompressImage(processedImg, compressOptions))
                {
                    ImagePersister.SaveImage(compressedImage, destFilePath, destFileName);
                }
            }
        }