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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include <config.h>
#include <test/lokassert.hpp>
#include <Delta.hpp>
#include <Util.hpp>
#include <Png.hpp>
/// Delta unit-tests.
class DeltaTests : public CPPUNIT_NS::TestFixture
{
CPPUNIT_TEST_SUITE(DeltaTests);
CPPUNIT_TEST(testDeltaSequence);
CPPUNIT_TEST(testRandomDeltas);
CPPUNIT_TEST_SUITE_END();
void testDeltaSequence();
void testRandomDeltas();
std::vector<char> loadPng(const char *relpath,
png_uint_32& height,
png_uint_32& width,
png_uint_32& rowBytes)
{
std::ifstream file(relpath);
std::stringstream buffer;
buffer << file.rdbuf();
file.close();
std::vector<png_bytep> rows =
Png::decodePNG(buffer, height, width, rowBytes);
std::vector<char> output;
for (png_uint_32 y = 0; y < height; ++y)
{
for (png_uint_32 i = 0; i < width * 4; ++i)
{
output.push_back(rows[y][i]);
}
}
return output;
}
std::vector<char> applyDelta(
const std::vector<char> &pixmap,
png_uint_32 width, png_uint_32 height,
const std::vector<char> &delta);
void assertEqual(const std::vector<char> &a,
const std::vector<char> &b,
int width, int height);
};
// Quick hack for debugging
std::vector<char> DeltaTests::applyDelta(
const std::vector<char> &pixmap,
png_uint_32 width, png_uint_32 height,
const std::vector<char> &delta)
{
LOK_ASSERT(delta.size() >= 4);
LOK_ASSERT(delta[0] == 'D');
// start with the same state.
std::vector<char> output = pixmap;
LOK_ASSERT_EQUAL(output.size(), size_t(pixmap.size()));
LOK_ASSERT_EQUAL(output.size(), size_t(width * height * 4));
size_t offset = 0, i;
for (i = 1; i < delta.size() && offset < output.size();)
{
switch (delta[i])
{
case 'c': // copy row.
{
int count = (uint8_t)(delta[i+1]);
int srcRow = (uint8_t)(delta[i+2]);
int destRow = (uint8_t)(delta[i+3]);
// std::cout << "copy " << count <<" row(s) " << srcRow << " to " << destRow << "\n";
for (int cnt = 0; cnt < count; ++cnt)
{
const char *src = &pixmap[width * (srcRow + cnt) * 4];
char *dest = &output[width * (destRow + cnt) * 4];
for (size_t j = 0; j < width * 4; ++j)
*dest++ = *src++;
}
i += 4;
break;
}
case 'd': // new run
{
int destRow = (uint8_t)(delta[i+1]);
int destCol = (uint8_t)(delta[i+2]);
size_t length = (uint8_t)(delta[i+3]);
i += 4;
// std::cout << "new " << length << " at " << destCol << ", " << destRow << "\n";
LOK_ASSERT(length <= width - destCol);
char *dest = &output[width * destRow * 4 + destCol * 4];
for (size_t j = 0; j < length * 4 && i < delta.size(); ++j)
*dest++ = delta[i++];
break;
}
default:
std::cout << "Unknown delta code " << delta[i] << "\n";
LOK_ASSERT(false);
break;
}
}
LOK_ASSERT_EQUAL(delta.size(), i);
return output;
}
void DeltaTests::assertEqual(const std::vector<char> &a,
const std::vector<char> &b,
int width, int /* height */)
{
LOK_ASSERT_EQUAL(a.size(), b.size());
for (size_t i = 0; i < a.size(); ++i)
{
if (a[i] != b[i])
{
std::cout << "Differences starting at byte " << i << " "
<< (i/4 % width) << ", " << (i / (width * 4)) << ":\n";
size_t len;
for (len = 0; (a[i+len] != b[i+len] || len < 8) && i + len < a.size(); ++len)
{
std::cout << std::hex << (int)((unsigned char)a[i+len]) << " != ";
std::cout << std::hex << (int)((unsigned char)b[i+len]) << " ";
if (len > 0 && (len % 16 == 0))
std::cout<< "\n";
}
std::cout << " size " << len << "\n";
LOK_ASSERT(false);
}
}
}
void DeltaTests::testDeltaSequence()
{
DeltaGenerator gen;
png_uint_32 height, width, rowBytes;
const TileWireId textWid = 1;
std::vector<char> text =
DeltaTests::loadPng(TDOC "/delta-text.png",
height, width, rowBytes);
LOK_ASSERT(height == 256 && width == 256 && rowBytes == 256*4);
LOK_ASSERT_EQUAL(size_t(256 * 256 * 4), text.size());
const TileWireId text2Wid = 2;
std::vector<char> text2 =
DeltaTests::loadPng(TDOC "/delta-text2.png",
height, width, rowBytes);
LOK_ASSERT(height == 256 && width == 256 && rowBytes == 256*4);
LOK_ASSERT_EQUAL(size_t(256 * 256 * 4), text2.size());
std::vector<char> delta;
// Stash it in the cache
LOK_ASSERT(gen.createDelta(
reinterpret_cast<unsigned char *>(&text[0]),
0, 0, width, height, width, height,
delta, textWid, 0) == false);
LOK_ASSERT(delta.size() == 0);
// Build a delta between text2 & textWid
LOK_ASSERT(gen.createDelta(
reinterpret_cast<unsigned char *>(&text2[0]),
0, 0, width, height, width, height,
delta, text2Wid, textWid) == true);
LOK_ASSERT(delta.size() > 0);
// Apply it to move to the second frame
std::vector<char> reText2 = applyDelta(text, width, height, delta);
assertEqual(reText2, text2, width, height);
// Build a delta between text & text2Wid
std::vector<char> two2one;
LOK_ASSERT(gen.createDelta(
reinterpret_cast<unsigned char *>(&text[0]),
0, 0, width, height, width, height,
two2one, textWid, text2Wid) == true);
LOK_ASSERT(two2one.size() > 0);
// Apply it to get back to where we started
std::vector<char> reText = applyDelta(text2, width, height, two2one);
assertEqual(reText, text, width, height);
}
void DeltaTests::testRandomDeltas()
{
}
CPPUNIT_TEST_SUITE_REGISTRATION(DeltaTests);
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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