Merge pull request #33 from FoamyGuy/overlay_scale

Overlay scale

Author: FoamyGuy

adafruit_pycamera/__init__.py

@@ -240,6 +240,7 @@ def __init__(self) -> None:  # pylint: disable=too-many-statements
         self.combined_bmp = None
         self.preview_scale = None
         self.overlay_position = [None, None]
+        self.overlay_scale = 1.0
         self.splash = displayio.Group()
 
         # Reset display and I/O expander
@@ -929,13 +930,15 @@ def blit_overlay_into_last_capture(self):
 
         self.decoder.decode(photo_bitmap, scale=0, x=0, y=0)
 
-        bitmaptools.blit(
+        bitmaptools.rotozoom(
             photo_bitmap,
             self.overlay_bmp,
-            self.overlay_position[0] if self.overlay_position[0] is not None else 0,
-            self.overlay_position[1] if self.overlay_position[1] is not None else 0,
-            skip_source_index=self.overlay_transparency_color,
-            skip_dest_index=None,
+            ox=self.overlay_position[0] if self.overlay_position[0] is not None else 0,
+            oy=self.overlay_position[1] if self.overlay_position[1] is not None else 0,
+            px=0 if self.overlay_position[0] is not None else None,
+            py=0 if self.overlay_position[1] is not None else None,
+            skip_index=self.overlay_transparency_color,
+            scale=self.overlay_scale,
         )
 
         cc565_swapped = ColorConverter(input_colorspace=Colorspace.RGB565_SWAPPED)
@@ -1007,7 +1010,7 @@ def blit(self, bitmap, x_offset=0, y_offset=32):
             bitmaptools.rotozoom(
                 self.combined_bmp,
                 self.overlay_bmp,
-                scale=self.preview_scale,
+                scale=self.preview_scale * self.overlay_scale,
                 skip_index=self.overlay_transparency_color,
                 ox=int(self.overlay_position[0] * self.preview_scale)
                 if self.overlay_position[0] is not None

examples/overlay/code_select.py

@@ -11,6 +11,12 @@
 import traceback
 import adafruit_pycamera  # pylint: disable=import-error
 
+MODE_POSITION = 0
+MODE_SCALE = 1
+CURRENT_MODE = 0
+
+int_scale = 100
+
 pycam = adafruit_pycamera.PyCamera()
 pycam.mode = 0  # only mode 0 (JPEG) will work in this example
 
@@ -49,16 +55,34 @@
         print(f"changing overlay to {overlay_files[cur_overlay_idx]}")
         pycam.overlay = f"/sd/overlays/{overlay_files[cur_overlay_idx]}"
 
-    if not pycam.down.value:
-        pycam.overlay_position[1] += 1 * (int(pycam.down.current_duration / 0.3) + 1)
-    if not pycam.up.value:
-        pycam.overlay_position[1] -= 1 * (int(pycam.up.current_duration / 0.3) + 1)
-
-    if not pycam.left.value:
-        pycam.overlay_position[0] -= 1 * (int(pycam.left.current_duration / 0.3) + 1)
-    if not pycam.right.value:
-        pycam.overlay_position[0] += 1 * (int(pycam.right.current_duration / 0.3) + 1)
+    if CURRENT_MODE == MODE_POSITION:
+        if not pycam.down.value:
+            pycam.overlay_position[1] += 1 * (
+                int(pycam.down.current_duration / 0.3) + 1
+            )
+        if not pycam.up.value:
+            pycam.overlay_position[1] -= 1 * (int(pycam.up.current_duration / 0.3) + 1)
+        if not pycam.left.value:
+            pycam.overlay_position[0] -= 1 * (
+                int(pycam.left.current_duration / 0.3) + 1
+            )
+        if not pycam.right.value:
+            pycam.overlay_position[0] += 1 * (
+                int(pycam.right.current_duration / 0.3) + 1
+            )
+    if CURRENT_MODE == MODE_SCALE:
+        if pycam.down.fell:
+            int_scale -= 10
+            pycam.overlay_scale = int_scale / 100
+            print(pycam.overlay_scale)
+        if pycam.up.fell:
+            int_scale += 10
+            pycam.overlay_scale = int_scale / 100
+            print(pycam.overlay_scale)
 
+    if pycam.ok.fell:
+        CURRENT_MODE = MODE_POSITION if CURRENT_MODE == MODE_SCALE else MODE_SCALE
+        print(f"Changing mode to: {CURRENT_MODE}")
     if pycam.shutter.short_count:
         print("Shutter released")
         pycam.tone(1200, 0.05)