bitmap

问题 Image is copied from assets directory to internal storage directory and new image is successfully found in the directory using Android Studio's Device File Explorer. But UI is blank. What am I missing here? public class MainActivity extends AppCompatActivity { Context context; private final String assetImage = "qtest1.png"; boolean isDirectoryCreated; private ImageView myImageView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);

问题 What is the difference between ImageBitmap and ImageData in JavaScript? when do you want the one or the other? 回答1: An ImageBitmap holds a reference to bitmap data, which can be passed to and stored directly in the GPU. An ImageData holds a reference to a canvas pixel ArrayBuffer, which itself represents raw pixel values as an Array of un-premultiplied RGBA color channel values, which is only used by the CPU. The former can be painted directly by the GPU, with no other operations required.

问题 I am trying to read a bmp file using below function in c++ HANDLE hBmp = LoadImage(0, L"C:\\Users\\abhinay\\Desktop\\Sample.bmp", IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION | LR_LOADFROMFILE); In my scenario the sample.bmp is a QRCode which is generated by a 3rd part QRCode library. When i try to read QRCode generated with above "LoadImage" function i get hBmp as "NULL". I opened QRCode image "sample.bmp" with MS paint and saved it as .bmp in 24-bit Bitmap and now i am able to load the file

问题 I am trying to implement swipe to delete in RecyclerView. Everything seems to be working fine except drawing a delete icon below the item that's being swiped. This is how I am doing it: ItemTouchHelper.SimpleCallback simpleItemTouchCallback = new ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT) { @Override public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) { return false; } @Override public void

问题 I make extensive use of graphic elements in DM dialogs, mainly for visual feedback. Although I have used these successfully in GMS1 and GMS2, I have not yet gotten these to behave correctly in GMS3. I wonder whether I am deploying them incorrectly. The example script below illustrates my two main problems, a mismatch between the size of the graphic element and its associated bit map, and a strange contrast mapping (to black) for bit map values of 240 or RGB(240, 240, 240): class

问题 I make extensive use of graphic elements in DM dialogs, mainly for visual feedback. Although I have used these successfully in GMS1 and GMS2, I have not yet gotten these to behave correctly in GMS3. I wonder whether I am deploying them incorrectly. The example script below illustrates my two main problems, a mismatch between the size of the graphic element and its associated bit map, and a strange contrast mapping (to black) for bit map values of 240 or RGB(240, 240, 240): class

问题 I'm having problems converting a grayscale array of ints (int32[,]) into BMP format in C#. I tried cycling through the array to set pixel color in the BMP, it does work but it ends up being really slow and practically unusable. I did a lot of googling but I cannot find the answer to my question. I need to put that image in a PictureBox in real time so the method needs to be fast. Relevant discussion here Edit: the array is 8bit depth but stored as int32 Edit2: Just found this code private

问题 I'm having problems converting a grayscale array of ints (int32[,]) into BMP format in C#. I tried cycling through the array to set pixel color in the BMP, it does work but it ends up being really slow and practically unusable. I did a lot of googling but I cannot find the answer to my question. I need to put that image in a PictureBox in real time so the method needs to be fast. Relevant discussion here Edit: the array is 8bit depth but stored as int32 Edit2: Just found this code private

问题 I'm trying to make image of webpage, but some pages shows me as white page. In Registry editor browse \HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION\ and add there this: WindowsFormsApp1.exe with decimal value 11000 WindowsFormsApp1.vshost.exe with decimal value 11000 Here is my code: using System; using System.Collections.Generic; using System.Windows.Forms; using System.Drawing; using System.Drawing.Imaging; using System.Runtime

问题 I'm trying to make image of webpage, but some pages shows me as white page. In Registry editor browse \HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION\ and add there this: WindowsFormsApp1.exe with decimal value 11000 WindowsFormsApp1.vshost.exe with decimal value 11000 Here is my code: using System; using System.Collections.Generic; using System.Windows.Forms; using System.Drawing; using System.Drawing.Imaging; using System.Runtime