Import of the watch repository from Pebble

tests/fw/graphics/test_graphics_mask.h

@@ -0,0 +1,64 @@
+/*
+ * 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.
+ */
+
+#pragma once
+
+#include "applib/graphics/gtypes.h"
+#include "applib/graphics/graphics.h"
+#include "applib/graphics/graphics_private_raw_mask.h"
+#include "applib/graphics/framebuffer.h"
+#include "util/graphics.h"
+
+static uint8_t test_graphics_context_mask_get_value_for_coordinate(const GContext *ctx,
+                                                                   const GDrawMask *mask,
+                                                                   GPoint p) {
+  const uint8_t mask_pixel_value = graphics_private_raw_mask_get_value(ctx, mask, p);
+
+  cl_assert(WITHIN(mask_pixel_value, 0, (1 << (GDRAWMASK_BITS_PER_PIXEL)) - 1));
+
+  return mask_pixel_value;
+}
+
+static void test_graphics_context_mask_set_value_for_coordinate(GContext *ctx, GDrawMask *mask,
+                                                                uint8_t value, GPoint p) {
+  cl_assert(WITHIN(value, 0, (1 << (GDRAWMASK_BITS_PER_PIXEL)) - 1));
+
+  graphics_private_raw_mask_set_value(ctx, mask, p, value);
+}
+
+static void test_graphics_context_mask_debug(GContext *ctx, GDrawMask *mask) {
+  GBitmap *framebuffer_bitmap = &ctx->dest_bitmap;
+
+  // Naive approach
+  for (int y = 0; y < framebuffer_bitmap->bounds.size.h; y++) {
+    const GBitmapDataRowInfo current_data_row_info = gbitmap_get_data_row_info(framebuffer_bitmap,
+                                                                               y);
+
+    // Iterate over the relevant mask row pixel values and use each to draw our debug image
+    for (int x = current_data_row_info.min_x; x <= current_data_row_info.max_x; x++) {
+      const uint8_t mask_pixel_value =
+        test_graphics_context_mask_get_value_for_coordinate(ctx, mask, GPoint(x, y));
+      const GColor color_lookup[1 << GDRAWMASK_BITS_PER_PIXEL] = {
+        GColorBlack,
+        GColorDarkGray,
+        GColorLightGray,
+        GColorWhite,
+      };
+      const GColor pixel_color = color_lookup[mask_pixel_value];
+      current_data_row_info.data[x] = pixel_color.argb;
+    }
+  }
+}