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// Copyright (c) 2011 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 "content/test/render_widget_browsertest.h"
#include "base/basictypes.h"
#include "base/file_path.h"
#include "base/file_util.h"
#include "base/memory/ref_counted_memory.h"
#include "base/stringprintf.h"
#include "content/common/view_messages.h"
#include "content/renderer/render_view_impl.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebSize.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
#include "ui/gfx/codec/jpeg_codec.h"
#include "ui/gfx/size.h"
#include "ui/gfx/surface/transport_dib.h"
const int RenderWidgetTest::kNumBytesPerPixel = 4;
const int RenderWidgetTest::kLargeWidth = 1024;
const int RenderWidgetTest::kLargeHeight = 768;
const int RenderWidgetTest::kSmallWidth = 600;
const int RenderWidgetTest::kSmallHeight = 450;
const int RenderWidgetTest::kTextPositionX = 800;
const int RenderWidgetTest::kTextPositionY = 600;
const uint32 RenderWidgetTest::kRedARGB = 0xFFFF0000;
RenderWidgetTest::RenderWidgetTest() {}
void RenderWidgetTest::ResizeAndPaint(const gfx::Size& page_size,
const gfx::Size& desired_size,
SkBitmap* snapshot) {
static int g_sequence_num = 0;
// Use a new sequence number for each DIB.
scoped_ptr<TransportDIB> pixels(
page_size.width() * page_size.height() * kNumBytesPerPixel,
// Go ahead and map the DIB into memory, so that we can use it below
// to fill tmp_bitmap. Note that we need to do this before calling
// OnMsgPaintAtSize, or the last reference to the shared memory will
// be closed and the handle will no longer be valid.
scoped_ptr<TransportDIB> mapped_pixels(TransportDIB::Map(pixels->handle()));
RenderViewImpl* impl = static_cast<RenderViewImpl*>(view_);
impl->OnMsgPaintAtSize(pixels->handle(), g_sequence_num, page_size,
const IPC::Message* msg = render_thread_->sink().GetUniqueMessageMatching(
ASSERT_NE(static_cast<IPC::Message*>(NULL), msg);
ViewHostMsg_PaintAtSize_ACK::Param params;
ViewHostMsg_PaintAtSize_ACK::Read(msg, &params);
EXPECT_EQ(g_sequence_num, params.a);
gfx::Size size = params.b;
EXPECT_EQ(desired_size, size);
SkBitmap tmp_bitmap;
size.width(), size.height());
// Copy the pixels from the TransportDIB object to the given snapshot.
ASSERT_TRUE(tmp_bitmap.copyTo(snapshot, SkBitmap::kARGB_8888_Config));
void RenderWidgetTest::TestResizeAndPaint() {
// Hello World message is only visible if the view size is at least
// kTextPositionX x kTextPositionY
"<html><body><div style='position: absolute; top: %d; left: "
"%d; background-color: red;'>Hello World</div></body></html>",
kTextPositionY, kTextPositionX).c_str());
WebKit::WebSize old_size = view_->GetWebView()->size();
SkBitmap bitmap;
// If we re-size the view to something smaller than where the 'Hello World'
// text is displayed we won't see any text in the snapshot. Hence,
// the snapshot should not contain any red.
gfx::Size size(kSmallWidth, kSmallHeight);
ResizeAndPaint(size, size, &bitmap);
// Make sure that the view has been re-sized to its old size.
EXPECT_TRUE(old_size == view_->GetWebView()->size());
EXPECT_EQ(kSmallWidth, bitmap.width());
EXPECT_EQ(kSmallHeight, bitmap.height());
EXPECT_FALSE(ImageContainsColor(bitmap, kRedARGB));
// Since we ask for the view to be re-sized to something larger than where the
// 'Hello World' text is written the text should be visible in the snapshot.
// Hence, the snapshot should contain some red.
size.SetSize(kLargeWidth, kLargeHeight);
ResizeAndPaint(size, size, &bitmap);
EXPECT_TRUE(old_size == view_->GetWebView()->size());
EXPECT_EQ(kLargeWidth, bitmap.width());
EXPECT_EQ(kLargeHeight, bitmap.height());
EXPECT_TRUE(ImageContainsColor(bitmap, kRedARGB));
// Even if the desired size is smaller than where the text is located we
// should still see the 'Hello World' message since the view size is
// still large enough.
ResizeAndPaint(size, gfx::Size(kSmallWidth, kSmallHeight), &bitmap);
EXPECT_TRUE(old_size == view_->GetWebView()->size());
EXPECT_EQ(kSmallWidth, bitmap.width());
EXPECT_EQ(kSmallHeight, bitmap.height());
EXPECT_TRUE(ImageContainsColor(bitmap, kRedARGB));
bool RenderWidgetTest::ImageContainsColor(const SkBitmap& bitmap,
uint32 argb_color) {
SkAutoLockPixels lock(bitmap);
bool ready = bitmap.readyToDraw();
if (!ready) {
return false;
for (int x = 0; x < bitmap.width(); ++x) {
for (int y = 0; y < bitmap.height(); ++y) {
if (argb_color == *bitmap.getAddr32(x, y)) {
return true;
return false;
void RenderWidgetTest::OutputBitmapToFile(const SkBitmap& bitmap,
const FilePath& file_path) {
scoped_refptr<RefCountedBytes> bitmap_data(new RefCountedBytes());
SkAutoLockPixels lock(bitmap);
reinterpret_cast<unsigned char*>(bitmap.getAddr32(0, 0)),
90 /* quality */,
ASSERT_LT(0, file_util::WriteFile(
reinterpret_cast<const char*>(bitmap_data->front()),
TEST_F(RenderWidgetTest, OnMsgPaintAtSize) {