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-rw-r--r--app/gfx/codec/jpeg_codec_unittest.cc151
1 files changed, 0 insertions, 151 deletions
diff --git a/app/gfx/codec/jpeg_codec_unittest.cc b/app/gfx/codec/jpeg_codec_unittest.cc
deleted file mode 100644
index bf8eaab..0000000
--- a/app/gfx/codec/jpeg_codec_unittest.cc
+++ /dev/null
@@ -1,151 +0,0 @@
-// 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 <math.h>
-
-#include "app/gfx/codec/jpeg_codec.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace gfx {
-
-// out of 100, this indicates how compressed it will be, this should be changed
-// with jpeg equality threshold
-// static int jpeg_quality = 75; // FIXME(brettw)
-static int jpeg_quality = 100;
-
-// The threshold of average color differences where we consider two images
-// equal. This number was picked to be a little above the observed difference
-// using the above quality.
-static double jpeg_equality_threshold = 1.0;
-
-// Computes the average difference between each value in a and b. A and b
-// should be the same size. Used to see if two images are approximately equal
-// in the presence of compression.
-static double AveragePixelDelta(const std::vector<unsigned char>& a,
- const std::vector<unsigned char>& b) {
- // if the sizes are different, say the average difference is the maximum
- if (a.size() != b.size())
- return 255.0;
- if (a.size() == 0)
- return 0; // prevent divide by 0 below
-
- double acc = 0.0;
- for (size_t i = 0; i < a.size(); i++)
- acc += fabs(static_cast<double>(a[i]) - static_cast<double>(b[i]));
-
- return acc / static_cast<double>(a.size());
-}
-
-static void MakeRGBImage(int w, int h, std::vector<unsigned char>* dat) {
- dat->resize(w * h * 3);
- for (int y = 0; y < h; y++) {
- for (int x = 0; x < w; x++) {
- unsigned char* org_px = &(*dat)[(y * w + x) * 3];
- org_px[0] = x * 3; // r
- org_px[1] = x * 3 + 1; // g
- org_px[2] = x * 3 + 2; // b
- }
- }
-}
-
-TEST(JPEGCodec, EncodeDecodeRGB) {
- int w = 20, h = 20;
-
- // create an image with known values
- std::vector<unsigned char> original;
- MakeRGBImage(w, h, &original);
-
- // encode, making sure it was compressed some
- std::vector<unsigned char> encoded;
- EXPECT_TRUE(JPEGCodec::Encode(&original[0], JPEGCodec::FORMAT_RGB, w, h,
- w * 3, jpeg_quality, &encoded));
- EXPECT_GT(original.size(), encoded.size());
-
- // decode, it should have the same size as the original
- std::vector<unsigned char> decoded;
- int outw, outh;
- EXPECT_TRUE(JPEGCodec::Decode(&encoded[0], encoded.size(),
- JPEGCodec::FORMAT_RGB, &decoded,
- &outw, &outh));
- ASSERT_EQ(w, outw);
- ASSERT_EQ(h, outh);
- ASSERT_EQ(original.size(), decoded.size());
-
- // Images must be approximately equal (compression will have introduced some
- // minor artifacts).
- ASSERT_GE(jpeg_equality_threshold, AveragePixelDelta(original, decoded));
-}
-
-TEST(JPEGCodec, EncodeDecodeRGBA) {
- int w = 20, h = 20;
-
- // create an image with known values, a must be opaque because it will be
- // lost during compression
- std::vector<unsigned char> original;
- original.resize(w * h * 4);
- for (int y = 0; y < h; y++) {
- for (int x = 0; x < w; x++) {
- unsigned char* org_px = &original[(y * w + x) * 4];
- org_px[0] = x * 3; // r
- org_px[1] = x * 3 + 1; // g
- org_px[2] = x * 3 + 2; // b
- org_px[3] = 0xFF; // a (opaque)
- }
- }
-
- // encode, making sure it was compressed some
- std::vector<unsigned char> encoded;
- EXPECT_TRUE(JPEGCodec::Encode(&original[0], JPEGCodec::FORMAT_RGBA, w, h,
- w * 4, jpeg_quality, &encoded));
- EXPECT_GT(original.size(), encoded.size());
-
- // decode, it should have the same size as the original
- std::vector<unsigned char> decoded;
- int outw, outh;
- EXPECT_TRUE(JPEGCodec::Decode(&encoded[0], encoded.size(),
- JPEGCodec::FORMAT_RGBA, &decoded,
- &outw, &outh));
- ASSERT_EQ(w, outw);
- ASSERT_EQ(h, outh);
- ASSERT_EQ(original.size(), decoded.size());
-
- // Images must be approximately equal (compression will have introduced some
- // minor artifacts).
- ASSERT_GE(jpeg_equality_threshold, AveragePixelDelta(original, decoded));
-}
-
-// Test that corrupted data decompression causes failures.
-TEST(JPEGCodec, DecodeCorrupted) {
- int w = 20, h = 20;
-
- // some random data (an uncompressed image)
- std::vector<unsigned char> original;
- MakeRGBImage(w, h, &original);
-
- // it should fail when given non-JPEG compressed data
- std::vector<unsigned char> output;
- int outw, outh;
- ASSERT_FALSE(JPEGCodec::Decode(&original[0], original.size(),
- JPEGCodec::FORMAT_RGB, &output,
- &outw, &outh));
-
- // make some compressed data
- std::vector<unsigned char> compressed;
- ASSERT_TRUE(JPEGCodec::Encode(&original[0], JPEGCodec::FORMAT_RGB, w, h,
- w * 3, jpeg_quality, &compressed));
-
- // try decompressing a truncated version
- ASSERT_FALSE(JPEGCodec::Decode(&compressed[0], compressed.size() / 2,
- JPEGCodec::FORMAT_RGB, &output,
- &outw, &outh));
-
- // corrupt it and try decompressing that
- for (int i = 10; i < 30; i++)
- compressed[i] = i;
- ASSERT_FALSE(JPEGCodec::Decode(&compressed[0], compressed.size(),
- JPEGCodec::FORMAT_RGB, &output,
- &outw, &outh));
-}
-
-} // namespace gfx