1 // Copyright 2018 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "core/fpdfapi/page/cpdf_pageobjectholder.h"
6
7 #include <limits>
8
9 #include "testing/gtest/include/gtest/gtest.h"
10
11 // See https://crbug.com/852273
TEST(CPDFPageObjectHolder,GraphicsDataAsKey)12 TEST(CPDFPageObjectHolder, GraphicsDataAsKey) {
13 const float fMin = std::numeric_limits<float>::min();
14 const float fMax = std::numeric_limits<float>::max();
15 const float fInf = std::numeric_limits<float>::infinity();
16 const float fNan = std::numeric_limits<float>::quiet_NaN();
17
18 // Verify self-comparisions.
19 for (float c1 : {fMin, 1.0f, 2.0f, fMax, fInf, fNan}) {
20 for (float c2 : {fMin, 1.0f, 2.0f, fMax, fInf, fNan}) {
21 for (BlendMode c3 : {BlendMode::kMultiply, BlendMode::kScreen})
22 EXPECT_FALSE(GraphicsData({c1, c2, c3}) < GraphicsData({c1, c2, c3}));
23 }
24 }
25
26 std::map<GraphicsData, int> graphics_map;
27
28 // Insert in reverse index permuted order.
29 size_t x = 0;
30 for (BlendMode c3 : {BlendMode::kScreen, BlendMode::kMultiply}) {
31 for (float c2 : {fNan, fInf, fMax, 2.0f, 1.0f, fMin}) {
32 for (float c1 : {fNan, fInf, fMax, 2.0f, 1.0f, fMin}) {
33 graphics_map[{c1, c2, c3}] = x++;
34 }
35 }
36 }
37 EXPECT_EQ(72u, x);
38 EXPECT_EQ(72u, graphics_map.size());
39
40 // clang-format off
41 const int expected[72] = {
42 71, 35, 65, 29, 59, 23, 53, 17, 47, 11, 41, 5,
43 70, 34, 64, 28, 58, 22, 52, 16, 46, 10, 40, 4,
44 69, 33, 63, 27, 57, 21, 51, 15, 45, 9, 39, 3,
45 68, 32, 62, 26, 56, 20, 50, 14, 44, 8, 38, 2,
46 67, 31, 61, 25, 55, 19, 49, 13, 43, 7, 37, 1,
47 66, 30, 60, 24, 54, 18, 48, 12, 42, 6, 36, 0
48 };
49 // clang-format on
50
51 x = 0;
52 for (const auto& item : graphics_map) {
53 EXPECT_EQ(expected[x], item.second) << " for position " << x;
54 ++x;
55 }
56 EXPECT_EQ(72u, x);
57
58 // Erase in forward index permuted order.
59 for (BlendMode c3 : {BlendMode::kMultiply, BlendMode::kScreen}) {
60 for (float c2 : {fMin, 1.0f, 2.0f, fMax, fInf, fNan}) {
61 for (float c1 : {fMin, 1.0f, 2.0f, fMax, fInf, fNan})
62 graphics_map.erase({c1, c2, c3});
63 }
64 }
65 EXPECT_EQ(0u, graphics_map.size());
66 }
67