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| 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef COMPONENTS_VIZ_COMMON_DISPLAY_HIT_TEST_REGION_H_ |
| 6 #define COMPONENTS_VIZ_COMMON_DISPLAY_HIT_TEST_REGION_H_ |
| 7 |
| 8 #include <stdint.h> |
| 9 |
| 10 #include "cc/surfaces/surface_id.h" |
| 11 #include "ui/gfx/geometry/rect.h" |
| 12 #include "ui/gfx/transform.h" |
| 13 |
| 14 namespace viz { |
| 15 |
| 16 // An array of DisplayHitTestRegion elements is used to define the |
| 17 // aggregated hit-test data for the Display. |
| 18 // |
| 19 // It is designed to be in shared memory so that the viz process can |
| 20 // write the hit_test data, and the browser / ws process can read without |
| 21 // process hops. |
| 22 |
| 23 // A DisplayHitTestRegion element with child_count of kEndOfList indicates |
| 24 // the last element ( end of the list ). |
| 25 constexpr int kEndOfList = -1; |
| 26 |
| 27 struct DisplayHitTestRegion { |
| 28 // The cc::FrameSinkId corresponding to this region. Events that match |
| 29 // are routed to this surface. |
| 30 cc::FrameSinkId frame_sink_id; |
| 31 |
| 32 // Flags to indicate the type of region as defined in |
| 33 // services/viz/public/interfaces/hit_test_region_list.mojom.h. |
| 34 uint32_t flags; |
| 35 |
| 36 // The rectangle that defines the region in parent region's coordinate space. |
| 37 gfx::Rect rect; |
| 38 |
| 39 // The transform applied to the rect in parent region's coordinate space. |
| 40 gfx::Transform transform; |
| 41 |
| 42 // The number of children including their children below this entry. |
| 43 // If this element is not matched then child_count elements can be skipped |
| 44 // to move to the next entry. |
| 45 int child_count; |
| 46 }; |
| 47 |
| 48 } // namespace viz |
| 49 |
| 50 #endif // COMPONENTS_VIZ_COMMON_DISPLAY_HIT_TEST_REGION_H_ |
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