| /* |
| * 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 "Test.h" |
| #include "SkBitmap.h" |
| #include "SkData.h" |
| #include "SkForceLinking.h" |
| #include "SkImage.h" |
| #include "SkImageDecoder.h" |
| #include "SkStream.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. |
| */ |
| DEF_TEST(Gif, 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]" |
| } |
| |
| #endif // !(SK_BUILD_FOR_WIN32||SK_BUILD_FOR_IOS||SK_BUILD_FOR_MAC) |