| // Copyright 2017 PDFium 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 "core/fxcodec/gif/cfx_lzwdecompressor.h" |
| |
| #include "core/fxcrt/fx_memory.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| TEST(CFX_LZWDecompressor, CreateBadParams) { |
| EXPECT_EQ(nullptr, CFX_LZWDecompressor::Create(0x10, 0x2)); |
| EXPECT_EQ(nullptr, CFX_LZWDecompressor::Create(0x4, 0x0F)); |
| } |
| |
| TEST(CFX_LZWDecompressor, DecodeBadParams) { |
| uint8_t palette_exp = 0x0; |
| uint8_t code_exp = 0x2; |
| |
| auto decoder = CFX_LZWDecompressor::Create(palette_exp, code_exp); |
| ASSERT_NE(nullptr, decoder); |
| |
| uint8_t image_data[10]; |
| uint32_t image_size = FX_ArraySize(image_data); |
| |
| uint8_t output_data[10]; |
| uint32_t output_size = FX_ArraySize(output_data); |
| |
| EXPECT_EQ(CFX_GifDecodeStatus::Error, |
| decoder->Decode(nullptr, image_size, output_data, &output_size)); |
| EXPECT_EQ(CFX_GifDecodeStatus::Error, |
| decoder->Decode(image_data, 0, output_data, &output_size)); |
| EXPECT_EQ(CFX_GifDecodeStatus::Error, |
| decoder->Decode(image_data, image_size, nullptr, &output_size)); |
| EXPECT_EQ(CFX_GifDecodeStatus::Error, |
| decoder->Decode(image_data, image_size, output_data, nullptr)); |
| |
| output_size = 0; |
| EXPECT_EQ(CFX_GifDecodeStatus::InsufficientDestSize, |
| decoder->Decode(image_data, image_size, output_data, &output_size)); |
| } |
| |
| TEST(CFX_LZWDecompressor, Decode1x1SingleColour) { |
| uint8_t palette_exp = 0x0; |
| uint8_t code_exp = 0x2; |
| |
| auto decoder = CFX_LZWDecompressor::Create(palette_exp, code_exp); |
| ASSERT_NE(nullptr, decoder); |
| |
| uint8_t image_data[] = {0x44, 0x01}; |
| uint32_t image_size = FX_ArraySize(image_data); |
| |
| uint8_t output_data[1]; |
| uint32_t output_size = FX_ArraySize(output_data); |
| |
| EXPECT_EQ(CFX_GifDecodeStatus::Success, |
| decoder->Decode(image_data, image_size, output_data, &output_size)); |
| uint8_t expected_data[] = {0x00}; |
| |
| EXPECT_EQ(FX_ArraySize(output_data), output_size); |
| EXPECT_TRUE(0 == memcmp(expected_data, output_data, sizeof(expected_data))); |
| } |
| |
| TEST(CFX_LZWDecompressor, Decode10x10SingleColour) { |
| uint8_t palette_exp = 0x0; |
| uint8_t code_exp = 0x2; |
| |
| auto decoder = CFX_LZWDecompressor::Create(palette_exp, code_exp); |
| ASSERT_NE(nullptr, decoder); |
| |
| uint8_t image_data[] = {0x84, 0x8F, 0xA9, 0xCB, 0xED, 0x0F, 0x63, 0x2B}; |
| uint32_t image_size = FX_ArraySize(image_data); |
| |
| uint8_t output_data[100]; |
| memset(output_data, 0, sizeof(output_data)); |
| uint32_t output_size = FX_ArraySize(output_data); |
| |
| EXPECT_EQ(CFX_GifDecodeStatus::Success, |
| decoder->Decode(image_data, image_size, output_data, &output_size)); |
| uint8_t expected_data[] = { |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x00}; |
| |
| EXPECT_EQ(FX_ArraySize(output_data), output_size); |
| EXPECT_TRUE(0 == memcmp(expected_data, output_data, sizeof(expected_data))); |
| } |
| |
| TEST(CFX_LZWDecompressor, Decode10x10MultipleColour) { |
| uint8_t palette_exp = 0x1; |
| uint8_t code_exp = 0x2; |
| |
| auto decoder = CFX_LZWDecompressor::Create(palette_exp, code_exp); |
| ASSERT_NE(nullptr, decoder); |
| |
| uint8_t image_data[] = {0x8C, 0x2D, 0x99, 0x87, 0x2A, 0x1C, 0xDC, 0x33, |
| 0xA0, 0x02, 0x75, 0xEC, 0x95, 0xFA, 0xA8, 0xDE, |
| 0x60, 0x8C, 0x04, 0x91, 0x4C, 0x01}; |
| uint32_t image_size = FX_ArraySize(image_data); |
| |
| uint8_t output_data[100]; |
| memset(output_data, 0, sizeof(output_data)); |
| uint32_t output_size = FX_ArraySize(output_data); |
| |
| EXPECT_EQ(CFX_GifDecodeStatus::Success, |
| decoder->Decode(image_data, image_size, output_data, &output_size)); |
| uint8_t expected_data[] = { |
| 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, |
| 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x01, |
| 0x01, 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, |
| 0x00, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x02, |
| 0x02, 0x02, 0x02, 0x02, 0x02, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, |
| 0x02, 0x02, 0x02, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x02, 0x02, |
| 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02, |
| 0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, |
| 0x01, 0x01, 0x01, 0x01}; |
| |
| EXPECT_EQ(FX_ArraySize(output_data), output_size); |
| EXPECT_TRUE(0 == memcmp(expected_data, output_data, sizeof(expected_data))); |
| } |
| |
| TEST(CFX_LZWDecompressor, HandleColourCodeOutOfPalette) { |
| uint8_t palette_exp = 0x2; // Image uses 10 colours, so the palette exp |
| // should be 3, 2^(3+1) = 16 colours. |
| uint8_t code_exp = 0x4; |
| |
| auto decoder = CFX_LZWDecompressor::Create(palette_exp, code_exp); |
| ASSERT_NE(nullptr, decoder); |
| |
| uint8_t image_data[] = {0x30, 0xC9, 0x49, 0x81, 0xBD, 0x78, 0xE8, 0xCD, |
| 0x89, 0xFF, 0x60, 0x20, 0x8E, 0xE4, 0x61, 0x9E, |
| 0xA8, 0xA1, 0xAE, 0x2C, 0xE2, 0xBE, 0xB0, 0x20, |
| 0xCF, 0x74, 0x61, 0xDF, 0x78, 0x04}; |
| uint32_t image_size = FX_ArraySize(image_data); |
| |
| uint8_t output_data[100]; |
| memset(output_data, 0, sizeof(output_data)); |
| uint32_t output_size = FX_ArraySize(output_data); |
| |
| EXPECT_EQ(CFX_GifDecodeStatus::Error, |
| decoder->Decode(image_data, image_size, output_data, &output_size)); |
| } |