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//
// libavg - Media Playback Engine.
// Copyright (C) 2003-2014 Ulrich von Zadow
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Current versions can be found at www.libavg.de
//
#include "GraphicsTest.h"
#include "Bitmap.h"
#include "BitmapLoader.h"
#include "Filterfliprgb.h"
#include "Filtergrayscale.h"
#include "../base/Directory.h"
#include "../base/Exception.h"
#include <iostream>
#include <sstream>
#include <math.h>
namespace avg {
using namespace avg;
using namespace std;
GraphicsTest::GraphicsTest(const string& sName, int indentLevel)
: Test(sName, indentLevel)
{
}
void GraphicsTest::createResultImgDir()
{
Directory dir("resultimages");
int ok = dir.open(true);
if (ok == 0) {
dir.empty();
} else {
stringstream s;
s << "Could not create result image dir '" << dir.getName() << "'.";
cerr << s.str() << endl;
throw Exception(AVG_ERR_VIDEO_GENERAL, s.str());
}
}
BitmapPtr GraphicsTest::loadTestBmp(const std::string& sFName, PixelFormat pf)
{
try {
string sFullName = getSrcDirName()+"../test/media/"+sFName+".png";
return loadBitmap(sFullName, pf);
} catch (Exception & ex) {
cerr << ex.getStr() << endl;
throw;
}
}
void GraphicsTest::testEqual(Bitmap& resultBmp, const string& sFName, PixelFormat pf,
float maxAverage, float maxStdDev)
{
BitmapPtr pBaselineBmp;
try {
string sFullName = getSrcDirName()+"baseline/"+sFName+".png";
pBaselineBmp = loadBitmap(sFullName, pf);
} catch (Exception & ex) {
cerr << ex.getStr() << endl;
resultBmp.save("resultimages/"+sFName+".png");
throw;
}
testEqual(resultBmp, *pBaselineBmp, sFName, maxAverage, maxStdDev);
}
void GraphicsTest::testEqual(Bitmap& resultBmp, Bitmap& baselineBmp,
const string& sFName, float maxAverage, float maxStdDev)
{
BitmapPtr pDiffBmp;
try {
pDiffBmp = resultBmp.subtract(baselineBmp);
} catch (Exception& e) {
TEST_FAILED("Error: " << e.getStr() << ". File: '" << sFName << "'.");
string sResultName = "resultimages/"+sFName;
resultBmp.save(sResultName+".png");
baselineBmp.save(sResultName+"_baseline.png");
}
if (pDiffBmp) {
float average = pDiffBmp->getAvg();
float stdDev = pDiffBmp->getStdDev();
if (average > maxAverage || stdDev > maxStdDev) {
TEST_FAILED("Error: Decoded image differs from baseline '" <<
sFName << "'. average=" << average << ", stdDev=" << stdDev);
// resultBmp.dump();
// baselineBmp.dump();
string sResultName = "resultimages/"+sFName;
resultBmp.save(sResultName+".png");
baselineBmp.save(sResultName+"_baseline.png");
BitmapPtr pDiffBmp = resultBmp.subtract(baselineBmp);
pDiffBmp->save(sResultName+"_diff.png");
}
}
}
void GraphicsTest::testEqualBrightness(Bitmap& resultBmp, Bitmap& baselineBmp,
float epsilon)
{
float diff = fabs(resultBmp.getAvg()-baselineBmp.getAvg());
if (diff >= epsilon) {
TEST_FAILED("Error: Baseline brightness: " << baselineBmp.getAvg()
<< ", Result brightness: " << resultBmp.getAvg() << ", difference: "
<< diff);
}
}
int GraphicsTest::sumPixels(Bitmap& bmp)
{
AVG_ASSERT(bmp.getBytesPerPixel() == 4);
int sum = 0;
IntPoint size = bmp.getSize();
for (int y = 0; y < size.y; y++) {
unsigned char * pLine = bmp.getPixels()+y*bmp.getStride();
for (int x = 0; x < size.x; x++) {
sum += pLine[x*4];
sum += pLine[x*4+1];
sum += pLine[x*4+2];
}
}
return sum;
}
};
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