f05626bf96
Bug: skia:8461 According to skbug.com/7069, we should allow GIFs to use a transparent index outside of the range of the color table. Add a test to verify support for this. The GIF is 2x2 with the following pixels: ------------------------------------------------- | black | white | ------------------------------------------------- | transparent | transparent | ------------------------------------------------- The color table only has 2 entries (black and white), and the transparent index is 2. Change-Id: I16574a61e2982b6628c3eca96cb7b3e1f57d3b2a Reviewed-on: https://skia-review.googlesource.com/c/161561 Reviewed-by: Nigel Tao <nigeltao@google.com> Commit-Queue: Leon Scroggins <scroggo@google.com> Auto-Submit: Leon Scroggins <scroggo@google.com>
326 lines
12 KiB
C++
326 lines
12 KiB
C++
/*
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* Copyright 2013 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "CodecPriv.h"
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#include "Resources.h"
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#include "SkAndroidCodec.h"
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#include "SkBitmap.h"
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#include "SkData.h"
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#include "SkImage.h"
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#include "SkStream.h"
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#include "SkTypes.h"
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#include "Test.h"
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static unsigned char gGIFData[] = {
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0x47, 0x49, 0x46, 0x38, 0x37, 0x61, 0x03, 0x00, 0x03, 0x00, 0xe3, 0x08,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff, 0x00,
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0xff, 0x80, 0x80, 0x80, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
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0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0x2c, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x03, 0x00, 0x00, 0x04,
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0x07, 0x50, 0x1c, 0x43, 0x40, 0x41, 0x23, 0x44, 0x00, 0x3b
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};
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static unsigned char gGIFDataNoColormap[] = {
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// Header
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0x47, 0x49, 0x46, 0x38, 0x39, 0x61,
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// Screen descriptor
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0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,
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// Graphics control extension
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0x21, 0xf9, 0x04, 0x01, 0x0a, 0x00, 0x01, 0x00,
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// Image descriptor
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0x2c, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00,
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// Image data
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0x02, 0x02, 0x4c, 0x01, 0x00,
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// Trailer
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0x3b
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};
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static unsigned char gInterlacedGIF[] = {
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0x47, 0x49, 0x46, 0x38, 0x37, 0x61, 0x09, 0x00, 0x09, 0x00, 0xe3, 0x08, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff, 0x00, 0xff, 0x80,
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0x80, 0x80, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x00, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x2c, 0x00, 0x00, 0x00,
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0x00, 0x09, 0x00, 0x09, 0x00, 0x40, 0x04, 0x1b, 0x50, 0x1c, 0x23, 0xe9, 0x44,
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0x23, 0x60, 0x9d, 0x09, 0x28, 0x1e, 0xf8, 0x6d, 0x64, 0x56, 0x9d, 0x53, 0xa8,
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0x7e, 0xa8, 0x65, 0x94, 0x5c, 0xb0, 0x8a, 0x45, 0x04, 0x00, 0x3b
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};
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static void test_gif_data_no_colormap(skiatest::Reporter* r,
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void* data,
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size_t size) {
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SkBitmap bm;
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bool imageDecodeSuccess = decode_memory(data, size, &bm);
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REPORTER_ASSERT(r, imageDecodeSuccess);
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REPORTER_ASSERT(r, bm.width() == 1);
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REPORTER_ASSERT(r, bm.height() == 1);
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REPORTER_ASSERT(r, !(bm.empty()));
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if (!(bm.empty())) {
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REPORTER_ASSERT(r, bm.getColor(0, 0) == 0x00000000);
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}
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}
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static void test_gif_data(skiatest::Reporter* r, void* data, size_t size) {
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SkBitmap bm;
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bool imageDecodeSuccess = decode_memory(data, size, &bm);
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REPORTER_ASSERT(r, imageDecodeSuccess);
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REPORTER_ASSERT(r, bm.width() == 3);
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REPORTER_ASSERT(r, bm.height() == 3);
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REPORTER_ASSERT(r, !(bm.empty()));
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if (!(bm.empty())) {
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REPORTER_ASSERT(r, bm.getColor(0, 0) == 0xffff0000);
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REPORTER_ASSERT(r, bm.getColor(1, 0) == 0xffffff00);
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REPORTER_ASSERT(r, bm.getColor(2, 0) == 0xff00ffff);
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REPORTER_ASSERT(r, bm.getColor(0, 1) == 0xff808080);
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REPORTER_ASSERT(r, bm.getColor(1, 1) == 0xff000000);
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REPORTER_ASSERT(r, bm.getColor(2, 1) == 0xff00ff00);
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REPORTER_ASSERT(r, bm.getColor(0, 2) == 0xffffffff);
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REPORTER_ASSERT(r, bm.getColor(1, 2) == 0xffff00ff);
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REPORTER_ASSERT(r, bm.getColor(2, 2) == 0xff0000ff);
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}
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}
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static void test_gif_data_dims(skiatest::Reporter* r, void* data, size_t size, int width,
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int height) {
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SkBitmap bm;
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bool imageDecodeSuccess = decode_memory(data, size, &bm);
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REPORTER_ASSERT(r, imageDecodeSuccess);
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REPORTER_ASSERT(r, bm.width() == width);
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REPORTER_ASSERT(r, bm.height() == height);
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REPORTER_ASSERT(r, !(bm.empty()));
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}
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static void test_interlaced_gif_data(skiatest::Reporter* r,
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void* data,
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size_t size) {
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SkBitmap bm;
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bool imageDecodeSuccess = decode_memory(data, size, &bm);
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REPORTER_ASSERT(r, imageDecodeSuccess);
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REPORTER_ASSERT(r, bm.width() == 9);
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REPORTER_ASSERT(r, bm.height() == 9);
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REPORTER_ASSERT(r, !(bm.empty()));
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if (!(bm.empty())) {
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REPORTER_ASSERT(r, bm.getColor(0, 0) == 0xffff0000);
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REPORTER_ASSERT(r, bm.getColor(1, 0) == 0xffffff00);
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REPORTER_ASSERT(r, bm.getColor(2, 0) == 0xff00ffff);
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REPORTER_ASSERT(r, bm.getColor(0, 2) == 0xffffffff);
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REPORTER_ASSERT(r, bm.getColor(1, 2) == 0xffff00ff);
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REPORTER_ASSERT(r, bm.getColor(2, 2) == 0xff0000ff);
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REPORTER_ASSERT(r, bm.getColor(0, 4) == 0xff808080);
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REPORTER_ASSERT(r, bm.getColor(1, 4) == 0xff000000);
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REPORTER_ASSERT(r, bm.getColor(2, 4) == 0xff00ff00);
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REPORTER_ASSERT(r, bm.getColor(0, 6) == 0xffff0000);
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REPORTER_ASSERT(r, bm.getColor(1, 6) == 0xffffff00);
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REPORTER_ASSERT(r, bm.getColor(2, 6) == 0xff00ffff);
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REPORTER_ASSERT(r, bm.getColor(0, 8) == 0xffffffff);
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REPORTER_ASSERT(r, bm.getColor(1, 8) == 0xffff00ff);
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REPORTER_ASSERT(r, bm.getColor(2, 8) == 0xff0000ff);
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}
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}
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static void test_gif_data_short(skiatest::Reporter* r,
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void* data,
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size_t size) {
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SkBitmap bm;
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bool imageDecodeSuccess = decode_memory(data, size, &bm);
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REPORTER_ASSERT(r, imageDecodeSuccess);
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REPORTER_ASSERT(r, bm.width() == 3);
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REPORTER_ASSERT(r, bm.height() == 3);
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REPORTER_ASSERT(r, !(bm.empty()));
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if (!(bm.empty())) {
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REPORTER_ASSERT(r, bm.getColor(0, 0) == 0xffff0000);
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REPORTER_ASSERT(r, bm.getColor(1, 0) == 0xffffff00);
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REPORTER_ASSERT(r, bm.getColor(2, 0) == 0xff00ffff);
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REPORTER_ASSERT(r, bm.getColor(0, 1) == 0xff808080);
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REPORTER_ASSERT(r, bm.getColor(1, 1) == 0xff000000);
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REPORTER_ASSERT(r, bm.getColor(2, 1) == 0xff00ff00);
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}
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}
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/**
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This test will test the ability of the SkCodec to deal with
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GIF files which have been mangled somehow. We want to display as
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much of the GIF as possible.
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*/
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DEF_TEST(Gif, reporter) {
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// test perfectly good images.
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test_gif_data(reporter, static_cast<void *>(gGIFData), sizeof(gGIFData));
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test_interlaced_gif_data(reporter, static_cast<void *>(gInterlacedGIF),
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sizeof(gInterlacedGIF));
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unsigned char badData[sizeof(gGIFData)];
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memcpy(badData, gGIFData, sizeof(gGIFData));
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badData[6] = 0x01; // image too wide
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test_gif_data(reporter, static_cast<void *>(badData), sizeof(gGIFData));
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// "libgif warning [image too wide, expanding output to size]"
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memcpy(badData, gGIFData, sizeof(gGIFData));
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badData[8] = 0x01; // image too tall
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test_gif_data(reporter, static_cast<void *>(badData), sizeof(gGIFData));
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// "libgif warning [image too tall, expanding output to size]"
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memcpy(badData, gGIFData, sizeof(gGIFData));
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badData[62] = 0x01; // image shifted right
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test_gif_data_dims(reporter, static_cast<void *>(badData), sizeof(gGIFData), 4, 3);
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memcpy(badData, gGIFData, sizeof(gGIFData));
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badData[64] = 0x01; // image shifted down
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test_gif_data_dims(reporter, static_cast<void *>(badData), sizeof(gGIFData), 3, 4);
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memcpy(badData, gGIFData, sizeof(gGIFData));
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badData[62] = 0xff; // image shifted right
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badData[63] = 0xff;
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test_gif_data_dims(reporter, static_cast<void *>(badData), sizeof(gGIFData), 3 + 0xFFFF, 3);
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memcpy(badData, gGIFData, sizeof(gGIFData));
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badData[64] = 0xff; // image shifted down
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badData[65] = 0xff;
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test_gif_data_dims(reporter, static_cast<void *>(badData), sizeof(gGIFData), 3, 3 + 0xFFFF);
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test_gif_data_no_colormap(reporter, static_cast<void *>(gGIFDataNoColormap),
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sizeof(gGIFDataNoColormap));
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// Since there is no color map, we do not even need to parse the image data
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// to know that we should draw transparent. Truncate the file before the
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// data. This should still succeed.
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test_gif_data_no_colormap(reporter, static_cast<void *>(gGIFDataNoColormap), 31);
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// Likewise, incremental decoding should succeed here.
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{
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sk_sp<SkData> data = SkData::MakeWithoutCopy(gGIFDataNoColormap, 31);
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std::unique_ptr<SkCodec> codec(SkCodec::MakeFromData(data));
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REPORTER_ASSERT(reporter, codec);
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if (codec) {
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auto info = codec->getInfo().makeColorType(kN32_SkColorType);
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SkBitmap bm;
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bm.allocPixels(info);
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REPORTER_ASSERT(reporter, SkCodec::kSuccess == codec->startIncrementalDecode(
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info, bm.getPixels(), bm.rowBytes()));
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REPORTER_ASSERT(reporter, SkCodec::kSuccess == codec->incrementalDecode());
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REPORTER_ASSERT(reporter, bm.width() == 1);
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REPORTER_ASSERT(reporter, bm.height() == 1);
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REPORTER_ASSERT(reporter, !(bm.empty()));
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if (!(bm.empty())) {
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REPORTER_ASSERT(reporter, bm.getColor(0, 0) == 0x00000000);
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}
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}
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}
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// test short Gif. 80 is missing a few bytes.
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test_gif_data_short(reporter, static_cast<void *>(gGIFData), 80);
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// "libgif warning [DGifGetLine]"
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test_interlaced_gif_data(reporter, static_cast<void *>(gInterlacedGIF),
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100); // 100 is missing a few bytes
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// "libgif warning [interlace DGifGetLine]"
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}
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// Regression test for decoding a gif image with sampleSize of 4, which was
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// previously crashing.
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DEF_TEST(Gif_Sampled, r) {
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auto data = GetResourceAsData("images/test640x479.gif");
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REPORTER_ASSERT(r, data);
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if (!data) {
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return;
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}
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std::unique_ptr<SkStreamAsset> stream(new SkMemoryStream(std::move(data)));
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std::unique_ptr<SkAndroidCodec> codec(SkAndroidCodec::MakeFromStream(std::move(stream)));
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REPORTER_ASSERT(r, codec);
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if (!codec) {
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return;
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}
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SkAndroidCodec::AndroidOptions options;
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options.fSampleSize = 4;
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SkBitmap bm;
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bm.allocPixels(codec->getInfo());
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const SkCodec::Result result = codec->getAndroidPixels(codec->getInfo(), bm.getPixels(),
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bm.rowBytes(), &options);
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REPORTER_ASSERT(r, result == SkCodec::kSuccess);
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}
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// If a GIF file is truncated before the header for the first image is defined,
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// we should not create an SkCodec.
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DEF_TEST(Codec_GifTruncated, r) {
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sk_sp<SkData> data(GetResourceAsData("images/test640x479.gif"));
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if (!data) {
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return;
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}
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// This is right before the header for the first image.
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data = SkData::MakeSubset(data.get(), 0, 446);
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std::unique_ptr<SkCodec> codec(SkCodec::MakeFromData(data));
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REPORTER_ASSERT(r, !codec);
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}
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DEF_TEST(Codec_GifTruncated2, r) {
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sk_sp<SkData> data(GetResourceAsData("images/box.gif"));
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if (!data) {
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return;
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}
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// This is after the header, but before the color table.
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data = SkData::MakeSubset(data.get(), 0, 23);
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std::unique_ptr<SkCodec> codec(SkCodec::MakeFromData(data));
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if (!codec) {
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ERRORF(r, "Failed to create codec with partial data");
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return;
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}
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// Although we correctly created a codec, no frame is
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// complete enough that it has its metadata. Returning 0
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// ensures that Chromium will not try to create a frame
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// too early.
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REPORTER_ASSERT(r, codec->getFrameCount() == 0);
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}
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DEF_TEST(Codec_gif_out_of_palette, r) {
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if (GetResourcePath().isEmpty()) {
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return;
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}
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const char* path = "images/out-of-palette.gif";
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auto data = GetResourceAsData(path);
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if (!data) {
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ERRORF(r, "failed to find %s", path);
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return;
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}
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auto codec = SkCodec::MakeFromData(std::move(data));
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if (!codec) {
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ERRORF(r, "Could not create codec from %s", path);
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return;
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}
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SkBitmap bm;
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bm.allocPixels(codec->getInfo());
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auto result = codec->getPixels(bm.pixmap());
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REPORTER_ASSERT(r, result == SkCodec::kSuccess, "Failed to decode %s with error %s",
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path, SkCodec::ResultToString(result));
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struct {
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int x;
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int y;
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SkColor expected;
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} pixels[] = {
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{ 0, 0, SK_ColorBLACK },
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{ 1, 0, SK_ColorWHITE },
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{ 0, 1, SK_ColorTRANSPARENT },
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{ 1, 1, SK_ColorTRANSPARENT },
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};
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for (auto& pixel : pixels) {
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auto actual = bm.getColor(pixel.x, pixel.y);
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REPORTER_ASSERT(r, actual == pixel.expected,
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"pixel (%i,%i) mismatch! expected: %x actual: %x",
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pixel.x, pixel.y, pixel.expected, actual);
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}
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}
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