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// Copyright 2018 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.
#include "components/viz/client/hit_test_data_provider_draw_quad.h"
#include "components/viz/common/hit_test/hit_test_region_list.h"
#include "components/viz/common/quads/surface_draw_quad.h"
namespace viz {
HitTestDataProviderDrawQuad::HitTestDataProviderDrawQuad(
bool should_ask_for_child_region)
: should_ask_for_child_region_(should_ask_for_child_region) {}
HitTestDataProviderDrawQuad::~HitTestDataProviderDrawQuad() = default;
// Derives HitTestRegions from information in the |compositor_frame|.
base::Optional<HitTestRegionList> HitTestDataProviderDrawQuad::GetHitTestData(
const CompositorFrame& compositor_frame) const {
base::Optional<HitTestRegionList> hit_test_region_list(base::in_place);
hit_test_region_list->flags = HitTestRegionFlags::kHitTestMouse |
HitTestRegionFlags::kHitTestTouch |
HitTestRegionFlags::kHitTestMine;
hit_test_region_list->bounds.set_size(compositor_frame.size_in_pixels());
for (const auto& render_pass : compositor_frame.render_pass_list) {
// Skip the render_pass if the transform is not invertible (i.e. it will not
// be able to receive events).
gfx::Transform transform_from_root_target;
if (!render_pass->transform_to_root_target.GetInverse(
&transform_from_root_target)) {
continue;
}
for (const DrawQuad* quad : render_pass->quad_list) {
if (quad->material == DrawQuad::SURFACE_CONTENT) {
const SurfaceDrawQuad* surface_quad =
SurfaceDrawQuad::MaterialCast(quad);
// Skip the quad if the FrameSinkId between fallback and primary is not
// the same, because we don't know which FrameSinkId would be used to
// draw this quad.
if (surface_quad->fallback_surface_id.has_value() &&
surface_quad->fallback_surface_id->frame_sink_id() !=
surface_quad->primary_surface_id.frame_sink_id()) {
continue;
}
// Skip the quad if the transform is not invertible (i.e. it will not
// be able to receive events).
gfx::Transform target_to_quad_transform;
if (!quad->shared_quad_state->quad_to_target_transform.GetInverse(
&target_to_quad_transform)) {
continue;
}
hit_test_region_list->regions.emplace_back();
HitTestRegion& hit_test_region = hit_test_region_list->regions.back();
hit_test_region.frame_sink_id =
surface_quad->primary_surface_id.frame_sink_id();
hit_test_region.flags = HitTestRegionFlags::kHitTestMouse |
HitTestRegionFlags::kHitTestTouch |
HitTestRegionFlags::kHitTestChildSurface;
if (should_ask_for_child_region_)
hit_test_region.flags |= HitTestRegionFlags::kHitTestAsk;
hit_test_region.rect = surface_quad->rect;
hit_test_region.transform =
target_to_quad_transform * transform_from_root_target;
}
}
}
return hit_test_region_list;
}
} // namespace viz
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