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Diffstat (limited to 'tests/GifTest.cpp')
-rw-r--r-- | tests/GifTest.cpp | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/tests/GifTest.cpp b/tests/GifTest.cpp new file mode 100644 index 0000000000..5919b44d68 --- /dev/null +++ b/tests/GifTest.cpp @@ -0,0 +1,210 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +// This tests out GIF decoder (SkImageDecoder_libgif.cpp) +// It is not used on these platforms: +#if (!defined(SK_BUILD_FOR_WIN32)) && \ + (!defined(SK_BUILD_FOR_IOS)) && \ + (!defined(SK_BUILD_FOR_MAC)) + +#include "SkBitmap.h" +#include "SkData.h" +#include "SkForceLinking.h" +#include "SkImageDecoder.h" +#include "SkImage.h" +#include "SkStream.h" +#include "Test.h" + +__SK_FORCE_IMAGE_DECODER_LINKING; + +namespace { + unsigned char gifData[] = { + 0x47, 0x49, 0x46, 0x38, 0x37, 0x61, 0x03, 0x00, + 0x03, 0x00, 0xe3, 0x08, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff, 0x00, + 0xff, 0x80, 0x80, 0x80, 0x00, 0xff, 0x00, 0x00, + 0xff, 0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0x2c, 0x00, 0x00, + 0x00, 0x00, 0x03, 0x00, 0x03, 0x00, 0x00, 0x04, + 0x07, 0x50, 0x1c, 0x43, 0x40, 0x41, 0x23, 0x44, + 0x00, 0x3b}; + unsigned char gifDataNoColormap[] = { + 0x47, 0x49, 0x46, 0x38, 0x39, 0x61, 0x01, 0x00, + 0x01, 0x00, 0x00, 0x00, 0x00, 0x21, 0xf9, 0x04, + 0x01, 0x0a, 0x00, 0x01, 0x00, 0x2c, 0x00, 0x00, + 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x02, + 0x02, 0x4c, 0x01, 0x00, 0x3b}; + unsigned char interlacedGif[] = { + 0x47, 0x49, 0x46, 0x38, 0x37, 0x61, 0x09, 0x00, + 0x09, 0x00, 0xe3, 0x08, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff, 0x00, + 0xff, 0x80, 0x80, 0x80, 0x00, 0xff, 0x00, 0x00, + 0xff, 0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0x2c, 0x00, 0x00, + 0x00, 0x00, 0x09, 0x00, 0x09, 0x00, 0x40, 0x04, + 0x1b, 0x50, 0x1c, 0x23, 0xe9, 0x44, 0x23, 0x60, + 0x9d, 0x09, 0x28, 0x1e, 0xf8, 0x6d, 0x64, 0x56, + 0x9d, 0x53, 0xa8, 0x7e, 0xa8, 0x65, 0x94, 0x5c, + 0xb0, 0x8a, 0x45, 0x04, 0x00, 0x3b}; +}; // namespace + +static void test_gif_data_no_colormap(skiatest::Reporter* r, + void* data, size_t size) { + SkBitmap bm; + bool imageDecodeSuccess = SkImageDecoder::DecodeMemory( + data, size, &bm); + REPORTER_ASSERT(r, imageDecodeSuccess); + REPORTER_ASSERT(r, bm.width() == 1); + REPORTER_ASSERT(r, bm.height() == 1); + REPORTER_ASSERT(r, !(bm.empty())); + if (!(bm.empty())) { + REPORTER_ASSERT(r, bm.getColor(0, 0) == 0x00000000); + } +} +static void test_gif_data(skiatest::Reporter* r, void* data, size_t size) { + SkBitmap bm; + bool imageDecodeSuccess = SkImageDecoder::DecodeMemory( + data, size, &bm); + REPORTER_ASSERT(r, imageDecodeSuccess); + REPORTER_ASSERT(r, bm.width() == 3); + REPORTER_ASSERT(r, bm.height() == 3); + REPORTER_ASSERT(r, !(bm.empty())); + if (!(bm.empty())) { + REPORTER_ASSERT(r, bm.getColor(0, 0) == 0xffff0000); + REPORTER_ASSERT(r, bm.getColor(1, 0) == 0xffffff00); + REPORTER_ASSERT(r, bm.getColor(2, 0) == 0xff00ffff); + REPORTER_ASSERT(r, bm.getColor(0, 1) == 0xff808080); + REPORTER_ASSERT(r, bm.getColor(1, 1) == 0xff000000); + REPORTER_ASSERT(r, bm.getColor(2, 1) == 0xff00ff00); + REPORTER_ASSERT(r, bm.getColor(0, 2) == 0xffffffff); + REPORTER_ASSERT(r, bm.getColor(1, 2) == 0xffff00ff); + REPORTER_ASSERT(r, bm.getColor(2, 2) == 0xff0000ff); + } +} +static void test_interlaced_gif_data(skiatest::Reporter* r, + void* data, + size_t size) { + SkBitmap bm; + bool imageDecodeSuccess = SkImageDecoder::DecodeMemory( + data, size, &bm); + REPORTER_ASSERT(r, imageDecodeSuccess); + REPORTER_ASSERT(r, bm.width() == 9); + REPORTER_ASSERT(r, bm.height() == 9); + REPORTER_ASSERT(r, !(bm.empty())); + if (!(bm.empty())) { + REPORTER_ASSERT(r, bm.getColor(0, 0) == 0xffff0000); + REPORTER_ASSERT(r, bm.getColor(1, 0) == 0xffffff00); + REPORTER_ASSERT(r, bm.getColor(2, 0) == 0xff00ffff); + + REPORTER_ASSERT(r, bm.getColor(0, 2) == 0xffffffff); + REPORTER_ASSERT(r, bm.getColor(1, 2) == 0xffff00ff); + REPORTER_ASSERT(r, bm.getColor(2, 2) == 0xff0000ff); + + REPORTER_ASSERT(r, bm.getColor(0, 4) == 0xff808080); + REPORTER_ASSERT(r, bm.getColor(1, 4) == 0xff000000); + REPORTER_ASSERT(r, bm.getColor(2, 4) == 0xff00ff00); + + REPORTER_ASSERT(r, bm.getColor(0, 6) == 0xffff0000); + REPORTER_ASSERT(r, bm.getColor(1, 6) == 0xffffff00); + REPORTER_ASSERT(r, bm.getColor(2, 6) == 0xff00ffff); + + REPORTER_ASSERT(r, bm.getColor(0, 8) == 0xffffffff); + REPORTER_ASSERT(r, bm.getColor(1, 8) == 0xffff00ff); + REPORTER_ASSERT(r, bm.getColor(2, 8) == 0xff0000ff); + } +} + +static void test_gif_data_short(skiatest::Reporter* r, + void* data, + size_t size) { + SkBitmap bm; + bool imageDecodeSuccess = SkImageDecoder::DecodeMemory( + data, size, &bm); + REPORTER_ASSERT(r, imageDecodeSuccess); + REPORTER_ASSERT(r, bm.width() == 3); + REPORTER_ASSERT(r, bm.height() == 3); + REPORTER_ASSERT(r, !(bm.empty())); + if (!(bm.empty())) { + REPORTER_ASSERT(r, bm.getColor(0, 0) == 0xffff0000); + REPORTER_ASSERT(r, bm.getColor(1, 0) == 0xffffff00); + REPORTER_ASSERT(r, bm.getColor(2, 0) == 0xff00ffff); + REPORTER_ASSERT(r, bm.getColor(0, 1) == 0xff808080); + REPORTER_ASSERT(r, bm.getColor(1, 1) == 0xff000000); + REPORTER_ASSERT(r, bm.getColor(2, 1) == 0xff00ff00); + } +} + +/** + This test will test the ability of the SkImageDecoder to deal with + GIF files which have been mangled somehow. We want to display as + much of the GIF as possible. +*/ +static void TestGif(skiatest::Reporter* reporter) { + // test perfectly good images. + test_gif_data(reporter, static_cast<void *>(gifData), sizeof(gifData)); + test_interlaced_gif_data(reporter, static_cast<void *>(interlacedGif), + sizeof(interlacedGif)); + + unsigned char badData[sizeof(gifData)]; + + /* If you set the environment variable + skia_images_gif_suppressDecoderWarnings to 'false', you will + see warnings on stderr. This is a feature. */ + + memcpy(badData, gifData, sizeof(gifData)); + badData[6] = 0x01; // image too wide + test_gif_data(reporter, static_cast<void *>(badData), sizeof(gifData)); + // "libgif warning [image too wide, expanding output to size]" + + memcpy(badData, gifData, sizeof(gifData)); + badData[8] = 0x01; // image too tall + test_gif_data(reporter, static_cast<void *>(badData), sizeof(gifData)); + // "libgif warning [image too tall, expanding output to size]" + + memcpy(badData, gifData, sizeof(gifData)); + badData[62] = 0x01; // image shifted right + test_gif_data(reporter, static_cast<void *>(badData), sizeof(gifData)); + // "libgif warning [shifting image left to fit]" + + memcpy(badData, gifData, sizeof(gifData)); + badData[64] = 0x01; // image shifted down + test_gif_data(reporter, static_cast<void *>(badData), sizeof(gifData)); + // "libgif warning [shifting image up to fit]" + + memcpy(badData, gifData, sizeof(gifData)); + badData[62] = 0xff; // image shifted left + badData[63] = 0xff; // 2's complement -1 short + test_gif_data(reporter, static_cast<void *>(badData), sizeof(gifData)); + // "libgif warning [shifting image left to fit]" + + memcpy(badData, gifData, sizeof(gifData)); + badData[64] = 0xff; // image shifted up + badData[65] = 0xff; // 2's complement -1 short + test_gif_data(reporter, static_cast<void *>(badData), sizeof(gifData)); + // "libgif warning [shifting image up to fit]" + + test_gif_data_no_colormap(reporter, static_cast<void *>(gifDataNoColormap), + sizeof(gifDataNoColormap)); + // "libgif warning [missing colormap]" + + // test short Gif. 80 is missing a few bytes. + test_gif_data_short(reporter, static_cast<void *>(gifData), 80); + // "libgif warning [DGifGetLine]" + + test_interlaced_gif_data(reporter, static_cast<void *>(interlacedGif), + 100); // 100 is missing a few bytes + // "libgif warning [interlace DGifGetLine]" +} + +#include "TestClassDef.h" +DEFINE_TESTCLASS("GifTest", GifTestClass, TestGif) + +#endif // !(SK_BUILD_FOR_WIN32||SK_BUILD_FOR_IOS||SK_BUILD_FOR_MAC) |