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// Copyright (c) 2009 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 "base/basictypes.h"
#include "chrome/browser/renderer_host/backing_store_manager.h"
#include "chrome/browser/renderer_host/mock_render_process_host.h"
#include "chrome/browser/renderer_host/test/test_render_view_host.h"
#include "chrome/browser/tab_contents/thumbnail_generator.h"
#include "chrome/common/notification_service.h"
#include "chrome/common/render_messages.h"
#include "chrome/common/transport_dib.h"
#include "chrome/test/testing_profile.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "skia/ext/platform_canvas.h"
#include "third_party/skia/include/core/SkColorPriv.h"
static const int kBitmapWidth = 100;
static const int kBitmapHeight = 100;
// TODO(brettw) enable this when GetThumbnailForBackingStore is implemented
// for other platforms in thumbnail_generator.cc
//#if defined(OS_WIN)
// TODO(brettw) enable this on Windows after we clobber a build to see if the
// failures of this on the buildbot can be resolved.
#if 0
class ThumbnailGeneratorTest : public testing::Test {
public:
ThumbnailGeneratorTest()
: profile_(),
process_(new MockRenderProcessHost(&profile_)),
widget_(process_, 1),
view_(&widget_) {
// Paiting will be skipped if there's no view.
widget_.set_view(&view_);
// Need to send out a create notification for the RWH to get hooked. This is
// a little scary in that we don't have a RenderView, but the only listener
// will want a RenderWidget, so it works out OK.
NotificationService::current()->Notify(
NotificationType::RENDER_VIEW_HOST_CREATED_FOR_TAB,
Source<RenderViewHostManager>(NULL),
Details<RenderViewHost>(reinterpret_cast<RenderViewHost*>(&widget_)));
transport_dib_.reset(TransportDIB::Create(kBitmapWidth * kBitmapHeight * 4,
1));
// We don't want to be sensitive to timing.
generator_.StartThumbnailing();
generator_.set_no_timeout(true);
}
protected:
// Indicates what bitmap should be sent with the paint message. _OTHER will
// only be retrned by CheckFirstPixel if the pixel is none of the others.
enum TransportType { TRANSPORT_BLACK, TRANSPORT_WHITE, TRANSPORT_OTHER };
void SendPaint(TransportType type) {
ViewHostMsg_PaintRect_Params params;
params.bitmap_rect = gfx::Rect(0, 0, kBitmapWidth, kBitmapHeight);
params.view_size = params.bitmap_rect.size();
params.flags = 0;
scoped_ptr<skia::PlatformCanvas> canvas(
transport_dib_->GetPlatformCanvas(kBitmapWidth, kBitmapHeight));
switch (type) {
case TRANSPORT_BLACK:
canvas->getTopPlatformDevice().accessBitmap(true).eraseARGB(
0xFF, 0, 0, 0);
break;
case TRANSPORT_WHITE:
canvas->getTopPlatformDevice().accessBitmap(true).eraseARGB(
0xFF, 0xFF, 0xFF, 0xFF);
break;
case TRANSPORT_OTHER:
default:
NOTREACHED();
break;
}
params.bitmap = transport_dib_->id();
ViewHostMsg_PaintRect msg(1, params);
widget_.OnMessageReceived(msg);
}
TransportType ClassifyFirstPixel(const SkBitmap& bitmap) {
// Returns the color of the first pixel of the bitmap. The bitmap must be
// non-empty.
SkAutoLockPixels lock(bitmap);
uint32 pixel = *bitmap.getAddr32(0, 0);
if (SkGetPackedA32(pixel) != 0xFF)
return TRANSPORT_OTHER; // All values expect an opqaue alpha channel
if (SkGetPackedR32(pixel) == 0 &&
SkGetPackedG32(pixel) == 0 &&
SkGetPackedB32(pixel) == 0)
return TRANSPORT_BLACK;
if (SkGetPackedR32(pixel) == 0xFF &&
SkGetPackedG32(pixel) == 0xFF &&
SkGetPackedB32(pixel) == 0xFF)
return TRANSPORT_WHITE;
EXPECT_TRUE(false) << "Got weird color: " << pixel;
return TRANSPORT_OTHER;
}
MessageLoopForUI message_loop_;
TestingProfile profile_;
// This will get deleted when the last RHWH associated with it is destroyed.
MockRenderProcessHost* process_;
RenderWidgetHost widget_;
TestRenderWidgetHostView view_;
ThumbnailGenerator generator_;
scoped_ptr<TransportDIB> transport_dib_;
private:
// testing::Test implementation.
void SetUp() {
}
void TearDown() {
}
};
TEST_F(ThumbnailGeneratorTest, NoThumbnail) {
// This is the case where there is no thumbnail available on the tab and
// there is no backing store. There should be no image returned.
SkBitmap result = generator_.GetThumbnailForRenderer(&widget_);
EXPECT_TRUE(result.isNull());
}
// Tests basic thumbnail generation when a backing store is discarded.
TEST_F(ThumbnailGeneratorTest, DiscardBackingStore) {
// First set up a backing store and then discard it.
SendPaint(TRANSPORT_BLACK);
widget_.WasHidden();
ASSERT_TRUE(BackingStoreManager::ExpireBackingStoreForTest(&widget_));
ASSERT_FALSE(widget_.GetBackingStore(false));
// The thumbnail generator should have stashed a thumbnail of the page.
SkBitmap result = generator_.GetThumbnailForRenderer(&widget_);
ASSERT_FALSE(result.isNull());
EXPECT_EQ(TRANSPORT_BLACK, ClassifyFirstPixel(result));
}
TEST_F(ThumbnailGeneratorTest, QuickShow) {
// Set up a hidden widget with a black cached thumbnail and an expired
// backing store.
SendPaint(TRANSPORT_BLACK);
widget_.WasHidden();
ASSERT_TRUE(BackingStoreManager::ExpireBackingStoreForTest(&widget_));
ASSERT_FALSE(widget_.GetBackingStore(false));
// Now show the widget and paint white.
widget_.WasRestored();
SendPaint(TRANSPORT_WHITE);
// The black thumbnail should still be cached because it hasn't processed the
// timer message yet.
SkBitmap result = generator_.GetThumbnailForRenderer(&widget_);
ASSERT_FALSE(result.isNull());
EXPECT_EQ(TRANSPORT_BLACK, ClassifyFirstPixel(result));
// Running the message loop will process the timer, which should expire the
// cached thumbnail. Asking again should give us a new one computed from the
// backing store.
message_loop_.RunAllPending();
result = generator_.GetThumbnailForRenderer(&widget_);
ASSERT_FALSE(result.isNull());
EXPECT_EQ(TRANSPORT_WHITE, ClassifyFirstPixel(result));
}
#endif
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