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-rw-r--r--gfx/codec/png_codec_unittest.cc297
1 files changed, 0 insertions, 297 deletions
diff --git a/gfx/codec/png_codec_unittest.cc b/gfx/codec/png_codec_unittest.cc
deleted file mode 100644
index 19d1f19..0000000
--- a/gfx/codec/png_codec_unittest.cc
+++ /dev/null
@@ -1,297 +0,0 @@
-// Copyright (c) 2006-2008 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 "gfx/codec/png_codec.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "third_party/skia/include/core/SkBitmap.h"
-#include "third_party/skia/include/core/SkUnPreMultiply.h"
-
-namespace gfx {
-
-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
- }
- }
-}
-
-// Set use_transparency to write data into the alpha channel, otherwise it will
-// be filled with 0xff. With the alpha channel stripped, this should yield the
-// same image as MakeRGBImage above, so the code below can make reference
-// images for conversion testing.
-static void MakeRGBAImage(int w, int h, bool use_transparency,
- std::vector<unsigned char>* dat) {
- dat->resize(w * h * 4);
- for (int y = 0; y < h; y++) {
- for (int x = 0; x < w; x++) {
- unsigned char* org_px = &(*dat)[(y * w + x) * 4];
- org_px[0] = x * 3; // r
- org_px[1] = x * 3 + 1; // g
- org_px[2] = x * 3 + 2; // b
- if (use_transparency)
- org_px[3] = x*3 + 3; // a
- else
- org_px[3] = 0xFF; // a (opaque)
- }
- }
-}
-
-// Returns true if each channel of the given two colors are "close." This is
-// used for comparing colors where rounding errors may cause off-by-one.
-bool ColorsClose(uint32_t a, uint32_t b) {
- return abs(static_cast<int>(SkColorGetB(a) - SkColorGetB(b))) < 2 &&
- abs(static_cast<int>(SkColorGetG(a) - SkColorGetG(b))) < 2 &&
- abs(static_cast<int>(SkColorGetR(a) - SkColorGetR(b))) < 2 &&
- abs(static_cast<int>(SkColorGetA(a) - SkColorGetA(b))) < 2;
-}
-
-// Returns true if the RGB components are "close."
-bool NonAlphaColorsClose(uint32_t a, uint32_t b) {
- return abs(static_cast<int>(SkColorGetB(a) - SkColorGetB(b))) < 2 &&
- abs(static_cast<int>(SkColorGetG(a) - SkColorGetG(b))) < 2 &&
- abs(static_cast<int>(SkColorGetR(a) - SkColorGetR(b))) < 2;
-}
-
-void MakeTestSkBitmap(int w, int h, SkBitmap* bmp) {
- bmp->setConfig(SkBitmap::kARGB_8888_Config, w, h);
- bmp->allocPixels();
-
- uint32_t* src_data = bmp->getAddr32(0, 0);
- for (int i = 0; i < w * h; i++) {
- src_data[i] = SkPreMultiplyARGB(i % 255, i % 250, i % 245, i % 240);
- }
-}
-
-TEST(PNGCodec, EncodeDecodeRGB) {
- const int w = 20, h = 20;
-
- // create an image with known values
- std::vector<unsigned char> original;
- MakeRGBImage(w, h, &original);
-
- // encode
- std::vector<unsigned char> encoded;
- EXPECT_TRUE(PNGCodec::Encode(&original[0], PNGCodec::FORMAT_RGB, w, h,
- w * 3, false, &encoded));
-
- // decode, it should have the same size as the original
- std::vector<unsigned char> decoded;
- int outw, outh;
- EXPECT_TRUE(PNGCodec::Decode(&encoded[0], encoded.size(),
- PNGCodec::FORMAT_RGB, &decoded,
- &outw, &outh));
- ASSERT_EQ(w, outw);
- ASSERT_EQ(h, outh);
- ASSERT_EQ(original.size(), decoded.size());
-
- // Images must be equal
- ASSERT_TRUE(original == decoded);
-}
-
-TEST(PNGCodec, EncodeDecodeRGBA) {
- const int w = 20, h = 20;
-
- // create an image with known values, a must be opaque because it will be
- // lost during encoding
- std::vector<unsigned char> original;
- MakeRGBAImage(w, h, true, &original);
-
- // encode
- std::vector<unsigned char> encoded;
- EXPECT_TRUE(PNGCodec::Encode(&original[0], PNGCodec::FORMAT_RGBA, w, h,
- w * 4, false, &encoded));
-
- // decode, it should have the same size as the original
- std::vector<unsigned char> decoded;
- int outw, outh;
- EXPECT_TRUE(PNGCodec::Decode(&encoded[0], encoded.size(),
- PNGCodec::FORMAT_RGBA, &decoded,
- &outw, &outh));
- ASSERT_EQ(w, outw);
- ASSERT_EQ(h, outh);
- ASSERT_EQ(original.size(), decoded.size());
-
- // Images must be exactly equal
- ASSERT_TRUE(original == decoded);
-}
-
-// Test that corrupted data decompression causes failures.
-TEST(PNGCodec, DecodeCorrupted) {
- int w = 20, h = 20;
-
- // Make 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;
- EXPECT_FALSE(PNGCodec::Decode(&original[0], original.size(),
- PNGCodec::FORMAT_RGB, &output,
- &outw, &outh));
-
- // Make some compressed data.
- std::vector<unsigned char> compressed;
- EXPECT_TRUE(PNGCodec::Encode(&original[0], PNGCodec::FORMAT_RGB, w, h,
- w * 3, false, &compressed));
-
- // Try decompressing a truncated version.
- EXPECT_FALSE(PNGCodec::Decode(&compressed[0], compressed.size() / 2,
- PNGCodec::FORMAT_RGB, &output,
- &outw, &outh));
-
- // Corrupt it and try decompressing that.
- for (int i = 10; i < 30; i++)
- compressed[i] = i;
- EXPECT_FALSE(PNGCodec::Decode(&compressed[0], compressed.size(),
- PNGCodec::FORMAT_RGB, &output,
- &outw, &outh));
-}
-
-TEST(PNGCodec, EncodeDecodeBGRA) {
- const int w = 20, h = 20;
-
- // Create an image with known values, alpha must be opaque because it will be
- // lost during encoding.
- std::vector<unsigned char> original;
- MakeRGBAImage(w, h, true, &original);
-
- // Encode.
- std::vector<unsigned char> encoded;
- EXPECT_TRUE(PNGCodec::Encode(&original[0], PNGCodec::FORMAT_BGRA, w, h,
- w * 4, false, &encoded));
-
- // Decode, it should have the same size as the original.
- std::vector<unsigned char> decoded;
- int outw, outh;
- EXPECT_TRUE(PNGCodec::Decode(&encoded[0], encoded.size(),
- PNGCodec::FORMAT_BGRA, &decoded,
- &outw, &outh));
- ASSERT_EQ(w, outw);
- ASSERT_EQ(h, outh);
- ASSERT_EQ(original.size(), decoded.size());
-
- // Images must be exactly equal.
- ASSERT_TRUE(original == decoded);
-}
-
-TEST(PNGCodec, StripAddAlpha) {
- const int w = 20, h = 20;
-
- // These should be the same except one has a 0xff alpha channel.
- std::vector<unsigned char> original_rgb;
- MakeRGBImage(w, h, &original_rgb);
- std::vector<unsigned char> original_rgba;
- MakeRGBAImage(w, h, false, &original_rgba);
-
- // Encode RGBA data as RGB.
- std::vector<unsigned char> encoded;
- EXPECT_TRUE(PNGCodec::Encode(&original_rgba[0],
- PNGCodec::FORMAT_RGBA,
- w, h,
- w * 4, true, &encoded));
-
- // Decode the RGB to RGBA.
- std::vector<unsigned char> decoded;
- int outw, outh;
- EXPECT_TRUE(PNGCodec::Decode(&encoded[0], encoded.size(),
- PNGCodec::FORMAT_RGBA, &decoded,
- &outw, &outh));
-
- // Decoded and reference should be the same (opaque alpha).
- ASSERT_EQ(w, outw);
- ASSERT_EQ(h, outh);
- ASSERT_EQ(original_rgba.size(), decoded.size());
- ASSERT_TRUE(original_rgba == decoded);
-
- // Encode RGBA to RGBA.
- EXPECT_TRUE(PNGCodec::Encode(&original_rgba[0],
- PNGCodec::FORMAT_RGBA,
- w, h,
- w * 4, false, &encoded));
-
- // Decode the RGBA to RGB.
- EXPECT_TRUE(PNGCodec::Decode(&encoded[0], encoded.size(),
- PNGCodec::FORMAT_RGB, &decoded,
- &outw, &outh));
-
- // It should be the same as our non-alpha-channel reference.
- ASSERT_EQ(w, outw);
- ASSERT_EQ(h, outh);
- ASSERT_EQ(original_rgb.size(), decoded.size());
- ASSERT_TRUE(original_rgb == decoded);
-}
-
-TEST(PNGCodec, EncodeBGRASkBitmap) {
- const int w = 20, h = 20;
-
- SkBitmap original_bitmap;
- MakeTestSkBitmap(w, h, &original_bitmap);
-
- // Encode the bitmap.
- std::vector<unsigned char> encoded;
- PNGCodec::EncodeBGRASkBitmap(original_bitmap, false, &encoded);
-
- // Decode the encoded string.
- SkBitmap decoded_bitmap;
- EXPECT_TRUE(PNGCodec::Decode(&encoded.front(), encoded.size(),
- &decoded_bitmap));
-
- // Compare the original bitmap and the output bitmap. We use ColorsClose
- // as SkBitmaps are considered to be pre-multiplied, the unpremultiplication
- // (in Encode) and repremultiplication (in Decode) can be lossy.
- for (int x = 0; x < w; x++) {
- for (int y = 0; y < h; y++) {
- uint32_t original_pixel = original_bitmap.getAddr32(0, y)[x];
- uint32_t decoded_pixel = decoded_bitmap.getAddr32(0, y)[x];
- EXPECT_TRUE(ColorsClose(original_pixel, decoded_pixel));
- }
- }
-}
-
-TEST(PNGCodec, EncodeBGRASkBitmapDiscardTransparency) {
- const int w = 20, h = 20;
-
- SkBitmap original_bitmap;
- MakeTestSkBitmap(w, h, &original_bitmap);
-
- // Encode the bitmap.
- std::vector<unsigned char> encoded;
- PNGCodec::EncodeBGRASkBitmap(original_bitmap, true, &encoded);
-
- // Decode the encoded string.
- SkBitmap decoded_bitmap;
- EXPECT_TRUE(PNGCodec::Decode(&encoded.front(), encoded.size(),
- &decoded_bitmap));
-
- // Compare the original bitmap and the output bitmap. We need to
- // unpremultiply original_pixel, as the decoded bitmap doesn't have an alpha
- // channel.
- for (int x = 0; x < w; x++) {
- for (int y = 0; y < h; y++) {
- uint32_t original_pixel = original_bitmap.getAddr32(0, y)[x];
- uint32_t unpremultiplied =
- SkUnPreMultiply::PMColorToColor(original_pixel);
- uint32_t decoded_pixel = decoded_bitmap.getAddr32(0, y)[x];
- EXPECT_TRUE(NonAlphaColorsClose(unpremultiplied, decoded_pixel))
- << "Original_pixel: ("
- << SkColorGetR(unpremultiplied) << ", "
- << SkColorGetG(unpremultiplied) << ", "
- << SkColorGetB(unpremultiplied) << "), "
- << "Decoded pixel: ("
- << SkColorGetR(decoded_pixel) << ", "
- << SkColorGetG(decoded_pixel) << ", "
- << SkColorGetB(decoded_pixel) << ")";
- }
- }
-}
-
-} // namespace gfx
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