Index: components/viz/hit_test/display_hit_test_data.h |
diff --git a/components/viz/hit_test/display_hit_test_data.h b/components/viz/hit_test/display_hit_test_data.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..34694ac38484095c17db4297323478e83ced2669 |
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+++ b/components/viz/hit_test/display_hit_test_data.h |
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+// Copyright 2017 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#ifndef COMPONENTS_VIZ_HIT_TEST_HIT_TEST_DATA_H_ |
+#define COMPONENTS_VIZ_HIT_TEST_HIT_TEST_DATA_H_ |
+ |
+#include <stdint.h> |
+ |
+#include <map> |
+#include <memory> |
+ |
+#include "cc/surfaces/surface_id.h" |
+#include "cc/surfaces/surface_observer.h" |
+#include "components/viz/hit_test/hit_test_export.h" |
+#include "components/viz/hit_test/public/interfaces/hit_test_data.mojom.h" |
+#include "ui/gfx/geometry/quad_f.h" |
+ |
+namespace viz { |
+ |
+// DiplayHitTestData contains the hit_test data for the Display. |
+// |
+// It is designed to be in shared memory so that the viz process can |
+// write the hit_test data, and the browser / ws process can read without |
+// process hops. |
+// |
+// One instance of this class contains a double buffer of entries - |
+// the viz process will write into one half while client processes read from |
+// the other. read_offset_ is used to swap buffers atomically. |
+ |
+// A DisplayHitTestRegion element with child_count of kEndOfList indicates |
+// the last element ( end of the list ). |
+constexpr int kEndOfList = -1; |
+ |
+// A read_offset_ set to kOldPleaseReAcquire indicates that the buffer has been |
+// resized and clients should re-acquire their reference. |
+constexpr int kOldPleaseReAcquire = -1; |
+ |
+struct DisplayHitTestRegion { |
+ cc::FrameSinkId frame_sink_id; |
+ uint32_t flags; |
+ gfx::Rect rect; |
+ gfx::Transform transform; |
+ int child_count; |
+}; |
+ |
+struct DisplayHitTestData { |
+ int length; |
+ base::subtle::Atomic32 read_offset; |
+ DisplayHitTestRegion regions[]; |
+}; |
+ |
+} // namespace viz |
+ |
+#endif // COMPONENTS_VIZ_HIT_TEST_HIT_TEST_DATA_H_ |