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// Copyright (c) 2012 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 "chrome/browser/thumbnails/simple_thumbnail_crop.h"
#include "base/basictypes.h"
#include "base/strings/stringprintf.h"
#include "chrome/browser/thumbnails/thumbnailing_context.h"
#include "chrome/common/render_messages.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/notification_types.h"
#include "content/public/test/mock_render_process_host.h"
#include "content/public/test/test_renderer_host.h"
#include "skia/ext/platform_canvas.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/skia/include/core/SkColorPriv.h"
#include "ui/gfx/canvas.h"
#include "ui/surface/transport_dib.h"
using content::WebContents;
using thumbnails::SimpleThumbnailCrop;
typedef testing::Test SimpleThumbnailCropTest;
TEST_F(SimpleThumbnailCropTest, CalculateBoringScore_Empty) {
SkBitmap bitmap;
EXPECT_DOUBLE_EQ(1.0, SimpleThumbnailCrop::CalculateBoringScore(bitmap));
}
TEST_F(SimpleThumbnailCropTest, CalculateBoringScore_SingleColor) {
const gfx::Size kSize(20, 10);
gfx::Canvas canvas(kSize, 1.0f, true);
// Fill all pixels in black.
canvas.FillRect(gfx::Rect(kSize), SK_ColorBLACK);
SkBitmap bitmap =
skia::GetTopDevice(*canvas.sk_canvas())->accessBitmap(false);
// The thumbnail should deserve the highest boring score.
EXPECT_DOUBLE_EQ(1.0, SimpleThumbnailCrop::CalculateBoringScore(bitmap));
}
TEST_F(SimpleThumbnailCropTest, CalculateBoringScore_TwoColors) {
const gfx::Size kSize(20, 10);
gfx::Canvas canvas(kSize, 1.0f, true);
// Fill all pixels in black.
canvas.FillRect(gfx::Rect(kSize), SK_ColorBLACK);
// Fill the left half pixels in white.
canvas.FillRect(gfx::Rect(0, 0, kSize.width() / 2, kSize.height()),
SK_ColorWHITE);
SkBitmap bitmap =
skia::GetTopDevice(*canvas.sk_canvas())->accessBitmap(false);
ASSERT_EQ(kSize.width(), bitmap.width());
ASSERT_EQ(kSize.height(), bitmap.height());
// The thumbnail should be less boring because two colors are used.
EXPECT_DOUBLE_EQ(0.5, SimpleThumbnailCrop::CalculateBoringScore(bitmap));
}
TEST_F(SimpleThumbnailCropTest, GetClippedBitmap_TallerThanWide) {
// The input bitmap is vertically long.
gfx::Canvas canvas(gfx::Size(40, 90), 1.0f, true);
SkBitmap bitmap =
skia::GetTopDevice(*canvas.sk_canvas())->accessBitmap(false);
// The desired size is square.
thumbnails::ClipResult clip_result = thumbnails::CLIP_RESULT_NOT_CLIPPED;
SkBitmap clipped_bitmap = SimpleThumbnailCrop::GetClippedBitmap(
bitmap, 10, 10, &clip_result);
// The clipped bitmap should be square.
EXPECT_EQ(40, clipped_bitmap.width());
EXPECT_EQ(40, clipped_bitmap.height());
// The input was taller than wide.
EXPECT_EQ(thumbnails::CLIP_RESULT_TALLER_THAN_WIDE, clip_result);
}
TEST_F(SimpleThumbnailCropTest, GetClippedBitmap_WiderThanTall) {
// The input bitmap is horizontally long.
gfx::Canvas canvas(gfx::Size(70, 40), 1.0f, true);
SkBitmap bitmap =
skia::GetTopDevice(*canvas.sk_canvas())->accessBitmap(false);
// The desired size is square.
thumbnails::ClipResult clip_result = thumbnails::CLIP_RESULT_NOT_CLIPPED;
SkBitmap clipped_bitmap = SimpleThumbnailCrop::GetClippedBitmap(
bitmap, 10, 10, &clip_result);
// The clipped bitmap should be square.
EXPECT_EQ(40, clipped_bitmap.width());
EXPECT_EQ(40, clipped_bitmap.height());
// The input was wider than tall.
EXPECT_EQ(thumbnails::CLIP_RESULT_WIDER_THAN_TALL, clip_result);
}
TEST_F(SimpleThumbnailCropTest, GetClippedBitmap_TooWiderThanTall) {
// The input bitmap is horizontally very long.
gfx::Canvas canvas(gfx::Size(90, 40), 1.0f, true);
SkBitmap bitmap =
skia::GetTopDevice(*canvas.sk_canvas())->accessBitmap(false);
// The desired size is square.
thumbnails::ClipResult clip_result = thumbnails::CLIP_RESULT_NOT_CLIPPED;
SkBitmap clipped_bitmap = SimpleThumbnailCrop::GetClippedBitmap(
bitmap, 10, 10, &clip_result);
// The clipped bitmap should be square.
EXPECT_EQ(40, clipped_bitmap.width());
EXPECT_EQ(40, clipped_bitmap.height());
// The input was wider than tall.
EXPECT_EQ(thumbnails::CLIP_RESULT_MUCH_WIDER_THAN_TALL, clip_result);
}
TEST_F(SimpleThumbnailCropTest, GetClippedBitmap_NotClipped) {
// The input bitmap is square.
gfx::Canvas canvas(gfx::Size(40, 40), 1.0f, true);
SkBitmap bitmap =
skia::GetTopDevice(*canvas.sk_canvas())->accessBitmap(false);
// The desired size is square.
thumbnails::ClipResult clip_result = thumbnails::CLIP_RESULT_NOT_CLIPPED;
SkBitmap clipped_bitmap = SimpleThumbnailCrop::GetClippedBitmap(
bitmap, 10, 10, &clip_result);
// The clipped bitmap should be square.
EXPECT_EQ(40, clipped_bitmap.width());
EXPECT_EQ(40, clipped_bitmap.height());
// There was no need to clip.
EXPECT_EQ(thumbnails::CLIP_RESULT_NOT_CLIPPED, clip_result);
}
TEST_F(SimpleThumbnailCropTest, GetClippedBitmap_NonSquareOutput) {
// The input bitmap is square.
gfx::Canvas canvas(gfx::Size(40, 40), 1.0f, true);
SkBitmap bitmap =
skia::GetTopDevice(*canvas.sk_canvas())->accessBitmap(false);
// The desired size is horizontally long.
thumbnails::ClipResult clip_result = thumbnails::CLIP_RESULT_NOT_CLIPPED;
SkBitmap clipped_bitmap = SimpleThumbnailCrop::GetClippedBitmap(
bitmap, 20, 10, &clip_result);
// The clipped bitmap should have the same aspect ratio of the desired size.
EXPECT_EQ(40, clipped_bitmap.width());
EXPECT_EQ(20, clipped_bitmap.height());
// The input was taller than wide.
EXPECT_EQ(thumbnails::CLIP_RESULT_TALLER_THAN_WIDE, clip_result);
}
TEST_F(SimpleThumbnailCropTest, GetCanvasCopyInfo) {
gfx::Size thumbnail_size(200, 120);
float desired_aspect =
static_cast<float>(thumbnail_size.width()) / thumbnail_size.height();
scoped_refptr<thumbnails::ThumbnailingAlgorithm> algorithm(
new SimpleThumbnailCrop(thumbnail_size));
gfx::Rect clipping_rect_result;
gfx::Size target_size_result;
thumbnails::ClipResult clip_result = algorithm->GetCanvasCopyInfo(
gfx::Size(400, 210),
ui::SCALE_FACTOR_200P,
&clipping_rect_result,
&target_size_result);
gfx::Size clipping_size = clipping_rect_result.size();
float clip_aspect =
static_cast<float>(clipping_size.width()) / clipping_size.height();
EXPECT_EQ(thumbnails::CLIP_RESULT_WIDER_THAN_TALL, clip_result);
EXPECT_EQ(thumbnail_size, target_size_result);
EXPECT_NEAR(desired_aspect, clip_aspect, 0.01);
clip_result = algorithm->GetCanvasCopyInfo(
gfx::Size(600, 200),
ui::SCALE_FACTOR_200P,
&clipping_rect_result,
&target_size_result);
clipping_size = clipping_rect_result.size();
clip_aspect =
static_cast<float>(clipping_size.width()) / clipping_size.height();
EXPECT_EQ(thumbnails::CLIP_RESULT_MUCH_WIDER_THAN_TALL, clip_result);
EXPECT_EQ(thumbnail_size, target_size_result);
EXPECT_NEAR(desired_aspect, clip_aspect, 0.01);
clip_result = algorithm->GetCanvasCopyInfo(
gfx::Size(300, 600),
ui::SCALE_FACTOR_200P,
&clipping_rect_result,
&target_size_result);
clipping_size = clipping_rect_result.size();
clip_aspect =
static_cast<float>(clipping_size.width()) / clipping_size.height();
EXPECT_EQ(thumbnails::CLIP_RESULT_TALLER_THAN_WIDE, clip_result);
EXPECT_EQ(thumbnail_size, target_size_result);
EXPECT_NEAR(desired_aspect, clip_aspect, 0.01);
clip_result = algorithm->GetCanvasCopyInfo(
gfx::Size(200, 100),
ui::SCALE_FACTOR_200P,
&clipping_rect_result,
&target_size_result);
EXPECT_EQ(thumbnails::CLIP_RESULT_SOURCE_IS_SMALLER, clip_result);
EXPECT_EQ(thumbnail_size, target_size_result);
}
TEST_F(SimpleThumbnailCropTest, GetClippingRect) {
const gfx::Size desired_size(300, 200);
thumbnails::ClipResult clip_result;
// Try out 'microsource'.
gfx::Rect clip_rect = SimpleThumbnailCrop::GetClippingRect(
gfx::Size(300, 199), desired_size, &clip_result);
EXPECT_EQ(thumbnails::CLIP_RESULT_SOURCE_IS_SMALLER, clip_result);
EXPECT_EQ(gfx::Point(0, 0).ToString(), clip_rect.origin().ToString());
EXPECT_EQ(desired_size.ToString(), clip_rect.size().ToString());
// Portrait source.
clip_rect = SimpleThumbnailCrop::GetClippingRect(
gfx::Size(500, 1200), desired_size, &clip_result);
EXPECT_EQ(thumbnails::CLIP_RESULT_TALLER_THAN_WIDE, clip_result);
EXPECT_EQ(gfx::Point(0, 0).ToString(), clip_rect.origin().ToString());
EXPECT_EQ(500, clip_rect.width());
EXPECT_GE(1200, clip_rect.height());
clip_rect = SimpleThumbnailCrop::GetClippingRect(
gfx::Size(2000, 800), desired_size, &clip_result);
EXPECT_TRUE(clip_result == thumbnails::CLIP_RESULT_WIDER_THAN_TALL ||
clip_result == thumbnails::CLIP_RESULT_MUCH_WIDER_THAN_TALL);
EXPECT_EQ(0, clip_rect.y());
EXPECT_LT(0, clip_rect.x());
EXPECT_GE(2000, clip_rect.width());
EXPECT_EQ(800, clip_rect.height());
clip_rect = SimpleThumbnailCrop::GetClippingRect(
gfx::Size(900, 600), desired_size, &clip_result);
EXPECT_EQ(thumbnails::CLIP_RESULT_NOT_CLIPPED, clip_result);
EXPECT_EQ(gfx::Point(0, 0).ToString(), clip_rect.origin().ToString());
EXPECT_EQ(gfx::Size(900, 600).ToString(), clip_rect.size().ToString());
}
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