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// Copyright 2014 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 "cc/layers/painted_scrollbar_layer_impl.h"
#include "cc/quads/draw_quad.h"
#include "cc/test/layer_test_common.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace cc {
namespace {
TEST(PaintedScrollbarLayerImplTest, Occlusion) {
gfx::Size layer_size(10, 1000);
float scale = 2.f;
gfx::Size scaled_layer_size(20, 2000);
gfx::Size viewport_size(1000, 1000);
LayerTestCommon::LayerImplTest impl;
SkBitmap thumb_sk_bitmap;
thumb_sk_bitmap.allocN32Pixels(10, 10);
thumb_sk_bitmap.setImmutable();
UIResourceId thumb_uid = 5;
UIResourceBitmap thumb_bitmap(thumb_sk_bitmap);
impl.host_impl()->CreateUIResource(thumb_uid, thumb_bitmap);
SkBitmap track_sk_bitmap;
track_sk_bitmap.allocN32Pixels(10, 10);
track_sk_bitmap.setImmutable();
UIResourceId track_uid = 6;
UIResourceBitmap track_bitmap(track_sk_bitmap);
impl.host_impl()->CreateUIResource(track_uid, track_bitmap);
ScrollbarOrientation orientation = VERTICAL;
PaintedScrollbarLayerImpl* scrollbar_layer_impl =
impl.AddChildToRoot<PaintedScrollbarLayerImpl>(orientation);
scrollbar_layer_impl->SetBounds(layer_size);
scrollbar_layer_impl->SetContentsOpaque(true);
scrollbar_layer_impl->set_internal_contents_scale_and_bounds(
scale, scaled_layer_size);
scrollbar_layer_impl->SetDrawsContent(true);
scrollbar_layer_impl->SetThumbThickness(layer_size.width());
scrollbar_layer_impl->SetThumbLength(500);
scrollbar_layer_impl->SetTrackLength(layer_size.height());
scrollbar_layer_impl->SetCurrentPos(100.f / 4);
scrollbar_layer_impl->SetClipLayerLength(100.f);
scrollbar_layer_impl->SetScrollLayerLength(200.f);
scrollbar_layer_impl->set_track_ui_resource_id(track_uid);
scrollbar_layer_impl->set_thumb_ui_resource_id(thumb_uid);
impl.CalcDrawProps(viewport_size);
gfx::Rect thumb_rect = scrollbar_layer_impl->ComputeThumbQuadRect();
EXPECT_EQ(gfx::Rect(0, 500 / 4, 10, layer_size.height() / 2).ToString(),
thumb_rect.ToString());
{
SCOPED_TRACE("No occlusion");
gfx::Rect occluded;
impl.AppendQuadsWithOcclusion(scrollbar_layer_impl, occluded);
size_t partially_occluded_count = 0;
LayerTestCommon::VerifyQuadsAreOccluded(
impl.quad_list(), occluded, &partially_occluded_count);
EXPECT_EQ(2u, impl.quad_list().size());
EXPECT_EQ(0u, partially_occluded_count);
// Note: this is also testing that the thumb and track are both
// scaled by the internal contents scale. It's not occlusion-related
// but is easy to verify here.
const DrawQuad* thumb_quad = impl.quad_list().ElementAt(0);
const DrawQuad* track_quad = impl.quad_list().ElementAt(1);
gfx::Rect scaled_thumb_rect = gfx::ScaleToEnclosingRect(thumb_rect, scale);
EXPECT_EQ(track_quad->rect.ToString(),
gfx::Rect(scaled_layer_size).ToString());
EXPECT_EQ(track_quad->opaque_rect.ToString(),
gfx::Rect(scaled_layer_size).ToString());
EXPECT_EQ(track_quad->visible_rect.ToString(),
gfx::Rect(scaled_layer_size).ToString());
EXPECT_EQ(thumb_quad->rect.ToString(), scaled_thumb_rect.ToString());
EXPECT_EQ(thumb_quad->visible_rect.ToString(),
scaled_thumb_rect.ToString());
}
{
SCOPED_TRACE("Full occlusion");
gfx::Rect occluded(scrollbar_layer_impl->visible_layer_rect());
impl.AppendQuadsWithOcclusion(scrollbar_layer_impl, occluded);
LayerTestCommon::VerifyQuadsExactlyCoverRect(impl.quad_list(), gfx::Rect());
EXPECT_EQ(impl.quad_list().size(), 0u);
}
{
SCOPED_TRACE("Partial occlusion");
gfx::Rect occluded(0, 0, 5, 1000);
impl.AppendQuadsWithOcclusion(scrollbar_layer_impl, occluded);
size_t partially_occluded_count = 0;
LayerTestCommon::VerifyQuadsAreOccluded(
impl.quad_list(), occluded, &partially_occluded_count);
// The layer outputs two quads, which is partially occluded.
EXPECT_EQ(2u, impl.quad_list().size());
EXPECT_EQ(2u, partially_occluded_count);
}
}
} // namespace
} // namespace cc
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