Import of the watch repository from Pebble

tools/roundrect.py

@@ -0,0 +1,61 @@
+#!/usr/bin/env python
+# Copyright 2024 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import math
+
+# Little tool to generate rounded rect insets, stored as 4 bit uints, packed together into a uint32.
+
+def calc_lookup(radius, is_bottom):
+    insets = [0] * (radius + 1)
+    
+    f = 1 - radius;
+    ddF_x = 1;
+    ddF_y = -2 * radius;
+    x = 0;
+    y = radius;
+    while(x < y):
+        if(f >= 0):
+            y -= 1
+            ddF_y += 2
+            f += ddF_y
+        
+        x += 1
+        ddF_x += 2
+        f += ddF_x
+        
+        insets[radius - y] = radius - x
+        insets[radius - x] = radius - y
+    
+    pack = 0
+    rng = xrange(0, radius) if (is_bottom) else xrange(radius - 1, -1, -1)
+    for i in rng:
+        pack = (pack << 4) | insets[i]
+    return pack
+
+def main():
+    f = open("roundrect.h", 'wb')
+    f.write("static const uint32_t round_top_corner_lookup[] = {\n\t0x0, ")
+    for radius in xrange(1, 9):
+        f.write("0x%02x, " % calc_lookup(radius, False))
+    f.write("\n};\n")
+    f.write("static const uint32_t round_bottom_corner_lookup[] = {\n\t0x0, ")
+    for radius in xrange(1, 9):
+        f.write("0x%02x, " % calc_lookup(radius, True))
+    f.write("\n};\n")
+    f.close()
+    return
+
+if __name__ == "__main__":
+    main()