/*
* 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 "SkImage.h"
#include "SkImageDecoder.h"
#include "SkStream.h"
#include "Test.h"
__SK_FORCE_IMAGE_DECODER_LINKING;
static unsigned char gGIFData[] = {
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
};
static unsigned char gGIFDataNoColormap[] = {
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
};
static unsigned char gInterlacedGIF[] = {
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
};
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 *>(gGIFData), sizeof(gGIFData));
test_interlaced_gif_data(reporter, static_cast<void *>(gInterlacedGIF),
sizeof(gInterlacedGIF));
unsigned char badData[sizeof(gGIFData)];
/* If you set the environment variable
skia_images_gif_suppressDecoderWarnings to 'false', you will
see warnings on stderr. This is a feature. */
memcpy(badData, gGIFData, sizeof(gGIFData));
badData[6] = 0x01; // image too wide
test_gif_data(reporter, static_cast<void *>(badData), sizeof(gGIFData));
// "libgif warning [image too wide, expanding output to size]"
memcpy(badData, gGIFData, sizeof(gGIFData));
badData[8] = 0x01; // image too tall
test_gif_data(reporter, static_cast<void *>(badData), sizeof(gGIFData));
// "libgif warning [image too tall, expanding output to size]"
memcpy(badData, gGIFData, sizeof(gGIFData));
badData[62] = 0x01; // image shifted right
test_gif_data(reporter, static_cast<void *>(badData), sizeof(gGIFData));
// "libgif warning [shifting image left to fit]"
memcpy(badData, gGIFData, sizeof(gGIFData));
badData[64] = 0x01; // image shifted down
test_gif_data(reporter, static_cast<void *>(badData), sizeof(gGIFData));
// "libgif warning [shifting image up to fit]"
memcpy(badData, gGIFData, sizeof(gGIFData));
badData[62] = 0xff; // image shifted left
badData[63] = 0xff; // 2's complement -1 short
test_gif_data(reporter, static_cast<void *>(badData), sizeof(gGIFData));
// "libgif warning [shifting image left to fit]"
memcpy(badData, gGIFData, sizeof(gGIFData));
badData[64] = 0xff; // image shifted up
badData[65] = 0xff; // 2's complement -1 short
test_gif_data(reporter, static_cast<void *>(badData), sizeof(gGIFData));
// "libgif warning [shifting image up to fit]"
test_gif_data_no_colormap(reporter, static_cast<void *>(gGIFDataNoColormap),
sizeof(gGIFDataNoColormap));
// "libgif warning [missing colormap]"
// test short Gif. 80 is missing a few bytes.
test_gif_data_short(reporter, static_cast<void *>(gGIFData), 80);
// "libgif warning [DGifGetLine]"
test_interlaced_gif_data(reporter, static_cast<void *>(gInterlacedGIF),
100); // 100 is missing a few bytes
// "libgif warning [interlace DGifGetLine]"
}
#endif // !(SK_BUILD_FOR_WIN32||SK_BUILD_FOR_IOS||SK_BUILD_FOR_MAC)