»This is how you manually load a .BMP file The bitmap file format: Bitmap file header Bitmap info header Palette data Bitmap data So on with the code part. This is our struct we need to create to hold the bitmap file header. #pragma pack(push, 1) typedef struct tagBITMAPFILEHEADER { WORD bfType; //specifies the file … Read more
Add bi.CacheOption = BitmapCacheOption.OnLoad directly after your .BeginInit(): BitmapImage bi = new BitmapImage(); bi.BeginInit(); bi.CacheOption = BitmapCacheOption.OnLoad; … Without this, BitmapImage uses lazy initialization by default and stream will be closed by then. In first example you try to read image from possibly garbage-collected closed or even disposed MemoryStream. Second example uses file, which is … Read more
I found an answer that works perfectly for me: /** * reduces the size of the image * @param image * @param maxSize * @return */ public Bitmap getResizedBitmap(Bitmap image, int maxSize) { int width = image.getWidth(); int height = image.getHeight(); float bitmapRatio = (float)width / (float) height; if (bitmapRatio > 1) { width = … Read more
In the first code example the stream is closed (by leaving the using block) before the image is actually loaded. You must also set BitmapCacheOptions.OnLoad to achieve that the image is loaded immediately, otherwise the stream needs to be kept open, as in your second example. public BitmapImage ToImage(byte[] array) { using (var ms = … Read more
This MSDN page has all the information you might want to know about resource URIs in WPF (often called pack URIs). You’re going to want to use relative URIs more often probably, so see Table 4, which should be of particular use. If you want a briefer overview of resource (pack) URIs, see this blog … Read more
To convert to a byte[] you can use a MemoryStream: byte[] data; JpegBitmapEncoder encoder = new JpegBitmapEncoder(); encoder.Frames.Add(BitmapFrame.Create(bitmapImage)); using(MemoryStream ms = new MemoryStream()) { encoder.Save(ms); data = ms.ToArray(); } Instead of the JpegBitmapEncoder you can use whatever BitmapEncoder you like as casperOne said. If you are using MS SQL you could also use a image-Column … Read more
Setting Up the database public class DatabaseHelper extends SQLiteOpenHelper { // Database Version private static final int DATABASE_VERSION = 1; // Database Name private static final String DATABASE_NAME = “database_name”; // Table Names private static final String DB_TABLE = “table_image”; // column names private static final String KEY_NAME = “image_name”; private static final String KEY_IMAGE … Read more
Yes, you can reference any image from the image element. And you can use data URIs to make the SVG self-contained. An example: <svg xmlns=”http://www.w3.org/2000/svg” xmlns:xlink=”http://www.w3.org/1999/xlink”> … <image width=”100″ height=”100″ xlink:href=”data:image/png;base64,IMAGE_DATA” /> … </svg> The svg element attribute xmlns:xlink declares xlink as a namespace prefix and says where the definition is. That then allows the … Read more