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Loading the red component of a 24-bit bitmap image into an array


Loading the red component of a 24-bit bitmap image into an array

By : The Teknicalist
Date : October 18 2020, 06:10 PM
I wish this help you Assuming they're stored or then I imagine this is your issue:
code :
la $t1, image       # adress of bitmap
add $t2, $t1, $t2   # adress of pixel array in $t2

#fill the array with red values
add $t2, $t2, 1 # ? 
PixelBuffer * buf = GetBitmap();
buf++;
[r][g][b][r][g][b][r][g][b][r][g][b][r][g][b][r][g][b][r][g][b]
    ^ -- pointing here at the start of the loop
mul $t4, $t3, 3     # $t4 = 3* $t3
add $t4, $t2, $t4   # $t4 = $t4 + $t2
[r][g][b][r][g][b][r][g][b][r][g][b][r][g][b][r][g][b][r][g][b]
    ^ ------ ^ ------ ^ ------ ^ ------ ^ ------ ^ ------ ^
########### REMOVED: add $t2, $t2, 1 # ? 
add $t2, $t2, 2 # ? 


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loading a bitmap image to a certain size

loading a bitmap image to a certain size


By : Bernardo Macías
Date : March 29 2020, 07:55 AM
will help you The key is al_draw_scaled_bitmap(). With that, you can blit any source bitmap onto the target bitmap at any new size. So you may not actually need to create a new bitmap. You can always use that function to draw the bitmap at a different size. Allegro 5 is hardware accelerated, so these types of operations are often "free."
To directly answer the question:
code :
ALLEGRO_BITMAP *load_bitmap_at_size(const char *filename, int w, int h)
{
  ALLEGRO_BITMAP *resized_bmp, *loaded_bmp, *prev_target;

  // 1. create a temporary bitmap of size we want
  resized_bmp = al_create_bitmap(w, h);
  if (!resized_bmp) return NULL;

  // 2. load the bitmap at the original size
  loaded_bmp = al_load_bitmap(filename);
  if (!loaded_bmp)
  {
     al_destroy_bitmap(resized_bmp);
     return NULL;
  }

  // 3. set the target bitmap to the resized bmp
  prev_target = al_get_target_bitmap();
  al_set_target_bitmap(resized_bmp);

  // 4. copy the loaded bitmap to the resized bmp
  al_draw_scaled_bitmap(loaded_bmp,
     0, 0,                                // source origin
     al_get_bitmap_width(loaded_bmp),     // source width
     al_get_bitmap_height(loaded_bmp),    // source height
     0, 0,                                // target origin
     w, h,                                // target dimensions
     0                                    // flags
  );

  // 5. restore the previous target and clean up
  al_set_target_bitmap(prev_target);
  al_destroy_loaded_bmp(loaded_bmp);

  return resized_bmp;      
}
void load_bitmap_onto_target(const char *filename)
{
  ALLEGRO_BITMAP *loaded_bmp;
  const int w = al_get_bitmap_width(al_get_target_bitmap());   
  const int h = al_get_bitmap_height(al_get_target_bitmap());

  // 1. load the bitmap at the original size
  loaded_bmp = al_load_bitmap(filename);
  if (!loaded_bmp) return;

  // 2. copy the loaded bitmap to the resized bmp
  al_draw_scaled_bitmap(loaded_bmp,
     0, 0,                                // source origin
     al_get_bitmap_width(loaded_bmp),     // source width
     al_get_bitmap_height(loaded_bmp),    // source height
     0, 0,                                // target origin
     w, h,                                // target dimensions
     0                                    // flags
  );

  // 3. cleanup
  al_destroy_bitmap(loaded_bmp);
}

ALLEGRO_BITMAP *my_bmp = al_create_bitmap(1000,1000);
al_set_target_bitmap(my_bmp);
load_bitmap_onto_target("test.png");
// perhaps restore the target bitmap to the back buffer, or continue
// to modify the my_bmp with more drawing operations.
Create a bitmap in c# with specific pixelformat from an image without loading the image

Create a bitmap in c# with specific pixelformat from an image without loading the image


By : ligang
Date : March 29 2020, 07:55 AM
seems to work fine If FileStream works to open the file, you might want to give some of the other constructors of Bitmap a try, in particular Bitmap(Stream).
If that doesn't help, you might try loading the raw bmp data, creating a Bitmap with the format you want and copying the data into the Bitmap manually (I'm not familiar with C# Bitmaps, but there should be some way of accessing the data).
ReactJS Image or other similar component to reuse image bitmap

ReactJS Image or other similar component to reuse image bitmap


By : zico
Date : March 29 2020, 07:55 AM
wish help you to fix your issue One reason I think of the flickering is if you reassign the key of list items and forcing it to re-render. Check if there is any such case. Thats one of the main reasons component to re-render on listviews.
Loading Image bitmap from user picked image into imageview doesn't set image

Loading Image bitmap from user picked image into imageview doesn't set image


By : user2959343
Date : March 29 2020, 07:55 AM
wish helps you You've mistaken the codes in the onActivityResult method. The requestCode is the one that identifies your request.
From the Activity source code:
code :
@Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        if(requestCode == 10) {
            if (resultCode == RESULT_OK && data != null) {
               Glide.with(this).load(data.getData()).into(logoImage);
            } else {
              // optional null data handling
            }
        }
    }
Loading big image to bitmap in android

Loading big image to bitmap in android


By : cbeggin
Date : March 29 2020, 07:55 AM
like below fixes the issue Hi i am using below code to load images from sdcard, it is running correctly, , Try to create purgeable Bitmap.
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