Add horizontalFlip() and verticalFlip() to BitmapBuffer

radio/src/thirdparty/libopenui/src/bitmapbuffer.cpp

@@ -676,6 +676,32 @@ BitmapBuffer * BitmapBuffer::loadMask(const char * filename)
   return bitmap;
 }
 
+BitmapBuffer * BitmapBuffer::horizontalFlip() const
+{
+  BitmapBuffer * result = new BitmapBuffer(format, width(), height());
+  pixel_t * srcData = data;
+  pixel_t * destData = result->data;
+  for (uint8_t y = 0; y < height(); y++) {
+    for (uint8_t x = 0; x < width(); x++) {
+      destData[x] = srcData[width() - 1 - x];
+    }
+    srcData += width();
+    destData += width();
+  }
+  return result;
+}
+
+BitmapBuffer * BitmapBuffer::verticalFlip() const
+{
+  BitmapBuffer * result = new BitmapBuffer(format, width(), height());
+  for (uint8_t y = 0; y < height(); y++) {
+    for (uint8_t x = 0; x < width(); x++) {
+      result->data[y * width() + x] = data[(height() - 1 - y) * width() + x];
+    }
+  }
+  return result;
+}
+
 BitmapBuffer * BitmapBuffer::loadMaskOnBackground(const char * filename, LcdFlags foreground, LcdFlags background)
 {
   BitmapBuffer * result = nullptr;

radio/src/thirdparty/libopenui/src/bitmapbuffer.h

@@ -232,7 +232,7 @@ class RLEBitmap:
     }
 };
 
-class BitmapBuffer: public BitmapBufferBase<uint16_t>
+class BitmapBuffer: public BitmapBufferBase<pixel_t>
 {
   private:
     bool dataAllocated;
@@ -500,6 +500,10 @@ class BitmapBuffer: public BitmapBufferBase<uint16_t>
       drawBitmap(x + xshift, y + yshift, bitmap, 0, 0, 0, 0, scale);
     }
 
+    BitmapBuffer * horizontalFlip() const;
+
+    BitmapBuffer * verticalFlip() const;
+
   protected:
     static BitmapBuffer * load_bmp(const char * filename);
     static BitmapBuffer * load_stb(const char * filename);