/////////////////////////////////////////////////////////////////////////////// // Name: tests/image/image.cpp // Purpose: Test wxImage // Author: Francesco Montorsi // Created: 2009-05-31 // RCS-ID: $Id$ // Copyright: (c) 2009 Francesco Montorsi // Licence: wxWindows licence /////////////////////////////////////////////////////////////////////////////// // ---------------------------------------------------------------------------- // headers // ---------------------------------------------------------------------------- #include "testprec.h" #if wxUSE_IMAGE #ifdef __BORLANDC__ #pragma hdrstop #endif #ifndef WX_PRECOMP #endif // WX_PRECOMP #include "wx/anidecod.h" // wxImageArray #include "wx/image.h" #include "wx/palette.h" #include "wx/url.h" #include "wx/log.h" #include "wx/mstream.h" #include "wx/zstream.h" #include "wx/wfstream.h" struct testData { const char* file; wxBitmapType type; unsigned bitDepth; } g_testfiles[] = { { "horse.ico", wxBITMAP_TYPE_ICO, 4 }, { "horse.xpm", wxBITMAP_TYPE_XPM, 8 }, { "horse.png", wxBITMAP_TYPE_PNG, 24 }, { "horse.ani", wxBITMAP_TYPE_ANI, 24 }, { "horse.bmp", wxBITMAP_TYPE_BMP, 8 }, { "horse.cur", wxBITMAP_TYPE_CUR, 1 }, { "horse.gif", wxBITMAP_TYPE_GIF, 8 }, { "horse.jpg", wxBITMAP_TYPE_JPEG, 24 }, { "horse.pcx", wxBITMAP_TYPE_PCX, 8 }, { "horse.pnm", wxBITMAP_TYPE_PNM, 24 }, { "horse.tga", wxBITMAP_TYPE_TGA, 8 }, { "horse.tif", wxBITMAP_TYPE_TIF, 8 } }; // ---------------------------------------------------------------------------- // test class // ---------------------------------------------------------------------------- class ImageTestCase : public CppUnit::TestCase { public: ImageTestCase(); ~ImageTestCase(); private: CPPUNIT_TEST_SUITE( ImageTestCase ); CPPUNIT_TEST( LoadFromSocketStream ); CPPUNIT_TEST( LoadFromZipStream ); CPPUNIT_TEST( LoadFromFile ); CPPUNIT_TEST( SizeImage ); CPPUNIT_TEST( CompareLoadedImage ); CPPUNIT_TEST( CompareSavedImage ); CPPUNIT_TEST( SavePNG ); CPPUNIT_TEST( SaveAnimatedGIF ); CPPUNIT_TEST( ReadCorruptedTGA ); CPPUNIT_TEST( GIFComment ); CPPUNIT_TEST( DibPadding ); CPPUNIT_TEST_SUITE_END(); void LoadFromSocketStream(); void LoadFromZipStream(); void LoadFromFile(); void SizeImage(); void CompareLoadedImage(); void CompareSavedImage(); void SavePNG(); void SaveAnimatedGIF(); void ReadCorruptedTGA(); void GIFComment(); void DibPadding(); DECLARE_NO_COPY_CLASS(ImageTestCase) }; CPPUNIT_TEST_SUITE_REGISTRATION( ImageTestCase ); CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( ImageTestCase, "ImageTestCase" ); ImageTestCase::ImageTestCase() { wxSocketBase::Initialize(); // the formats we're going to test: wxImage::AddHandler(new wxICOHandler); wxImage::AddHandler(new wxXPMHandler); wxImage::AddHandler(new wxPNGHandler); wxImage::AddHandler(new wxANIHandler); wxImage::AddHandler(new wxBMPHandler); wxImage::AddHandler(new wxCURHandler); wxImage::AddHandler(new wxGIFHandler); wxImage::AddHandler(new wxJPEGHandler); wxImage::AddHandler(new wxPCXHandler); wxImage::AddHandler(new wxPNMHandler); wxImage::AddHandler(new wxTGAHandler); wxImage::AddHandler(new wxTIFFHandler); } ImageTestCase::~ImageTestCase() { wxSocketBase::Shutdown(); } void ImageTestCase::LoadFromFile() { wxImage img; for (unsigned int i=0; iIsOk() ); wxImage img; // NOTE: it's important to inform wxImage about the type of the image being // loaded otherwise it will try to autodetect the format, but that // requires a seekable stream! WX_ASSERT_MESSAGE ( ("Loading image from \"%s\" failed.", testData[i].url), img.LoadFile(*in_stream, testData[i].type) ); delete in_stream; } } void ImageTestCase::LoadFromZipStream() { for (unsigned int i=0; iGetSize() ); unsigned bitsPerPixel = testPalette ? 8 : (testAlpha ? 32 : 24); WX_ASSERT_MESSAGE ( ("Compare test '%s (%d-bit)' for saving failed", handler.GetExtension(), bitsPerPixel), memcmp(actual.GetData(), expected->GetData(), expected->GetWidth() * expected->GetHeight() * 3) == 0 ); #if wxUSE_PALETTE CPPUNIT_ASSERT(actual.HasPalette() == (testPalette || type == wxBITMAP_TYPE_XPM)); #endif CPPUNIT_ASSERT( actual.HasAlpha() == testAlpha); if (!testAlpha) { return; } WX_ASSERT_MESSAGE ( ("Compare alpha test '%s' for saving failed", handler.GetExtension()), memcmp(actual.GetAlpha(), expected->GetAlpha(), expected->GetWidth() * expected->GetHeight()) == 0 ); } void ImageTestCase::CompareSavedImage() { // FIXME-VC6: Pre-declare the loop variables for compatibility with // pre-standard compilers such as MSVC6 that don't implement proper scope // for the variables declared in the for loops. int i, x, y; wxImage expected24("horse.png"); CPPUNIT_ASSERT( expected24.IsOk() ); CPPUNIT_ASSERT( !expected24.HasAlpha() ); wxImage expected8 = expected24.ConvertToGreyscale(); #if wxUSE_PALETTE unsigned char greys[256]; for (i = 0; i < 256; ++i) { greys[i] = i; } wxPalette palette(256, greys, greys, greys); expected8.SetPalette(palette); #endif // #if wxUSE_PALETTE expected8.SetOption(wxIMAGE_OPTION_BMP_FORMAT, wxBMP_8BPP_PALETTE); // Create an image with alpha based on the loaded image wxImage expected32(expected24); expected32.SetAlpha(); int width = expected32.GetWidth(); int height = expected32.GetHeight(); for (y = 0; y < height; ++y) { for (x = 0; x < width; ++x) { expected32.SetAlpha(x, y, (x*y) & wxIMAGE_ALPHA_OPAQUE); } } const wxList& list = wxImage::GetHandlers(); for ( wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext() ) { wxImageHandler *handler = (wxImageHandler *) node->GetData(); #if wxUSE_PALETTE CompareImage(*handler, expected8, wxIMAGE_HAVE_PALETTE); #endif CompareImage(*handler, expected24); CompareImage(*handler, expected32, wxIMAGE_HAVE_ALPHA); } } void ImageTestCase::SavePNG() { wxImage expected24("horse.png"); CPPUNIT_ASSERT( expected24.IsOk() ); #if wxUSE_PALETTE CPPUNIT_ASSERT( !expected24.HasPalette() ); #endif // #if wxUSE_PALETTE wxImage expected8 = expected24.ConvertToGreyscale(); /* horse.png converted to greyscale should be saved without a palette. */ CompareImage(*wxImage::FindHandler(wxBITMAP_TYPE_PNG), expected8); /* But if we explicitly ask for trying to save with a palette, it should work. */ expected8.SetOption(wxIMAGE_OPTION_PNG_FORMAT, wxPNG_TYPE_PALETTE); CompareImage(*wxImage::FindHandler(wxBITMAP_TYPE_PNG), expected8, wxIMAGE_HAVE_PALETTE); CPPUNIT_ASSERT( expected8.LoadFile("horse.gif") ); #if wxUSE_PALETTE CPPUNIT_ASSERT( expected8.HasPalette() ); #endif // #if wxUSE_PALETTE CompareImage(*wxImage::FindHandler(wxBITMAP_TYPE_PNG), expected8, wxIMAGE_HAVE_PALETTE); /* Add alpha to the image in such a way that there will still be a maximum of 256 unique RGBA combinations. This should result in a saved PNG image still being palettised and having alpha. */ expected8.SetAlpha(); int x, y; const int width = expected8.GetWidth(); const int height = expected8.GetHeight(); for (y = 0; y < height; ++y) { for (x = 0; x < width; ++x) { expected8.SetAlpha(x, y, expected8.GetRed(x, y)); } } CompareImage(*wxImage::FindHandler(wxBITMAP_TYPE_PNG), expected8, wxIMAGE_HAVE_ALPHA|wxIMAGE_HAVE_PALETTE); /* Now change the alpha of the first pixel so that we can't save palettised anymore because there will be 256+1 entries which is beyond PNGs limit of 256 entries. */ expected8.SetAlpha(0, 0, 1); CompareImage(*wxImage::FindHandler(wxBITMAP_TYPE_PNG), expected8, wxIMAGE_HAVE_ALPHA); /* Even if we explicitly ask for saving palettised it should not be done. */ expected8.SetOption(wxIMAGE_OPTION_PNG_FORMAT, wxPNG_TYPE_PALETTE); CompareImage(*wxImage::FindHandler(wxBITMAP_TYPE_PNG), expected8, wxIMAGE_HAVE_ALPHA); } void ImageTestCase::SaveAnimatedGIF() { #if wxUSE_PALETTE wxImage image("horse.gif"); CPPUNIT_ASSERT( image.IsOk() ); wxImageArray images; images.Add(image); int i; for (i = 0; i < 4-1; ++i) { images.Add( images[i].Rotate90() ); images[i+1].SetPalette(images[0].GetPalette()); } wxMemoryOutputStream memOut; CPPUNIT_ASSERT( wxGIFHandler().SaveAnimation(images, &memOut) ); wxGIFHandler handler; wxMemoryInputStream memIn(memOut); CPPUNIT_ASSERT(memIn.IsOk()); const int imageCount = handler.GetImageCount(memIn); CPPUNIT_ASSERT_EQUAL(4, imageCount); for (i = 0; i < imageCount; ++i) { wxFileOffset pos = memIn.TellI(); CPPUNIT_ASSERT( handler.LoadFile(&image, memIn, true, i) ); memIn.SeekI(pos); WX_ASSERT_MESSAGE ( ("Compare test for GIF frame number %d failed", i), memcmp(image.GetData(), images[i].GetData(), images[i].GetWidth() * images[i].GetHeight() * 3) == 0 ); } #endif // #if wxUSE_PALETTE } void ImageTestCase::ReadCorruptedTGA() { static unsigned char corruptTGA[18+1+3] = { 0, 0, 10, // RLE compressed image. 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, // Width is 1. 1, 0, // Height is 1. 24, // Bits per pixel. 0, 0xff, // Run length (repeat next pixel 127+1 times). 0xff, 0xff, 0xff // One 24-bit pixel. }; wxMemoryInputStream memIn(corruptTGA, WXSIZEOF(corruptTGA)); CPPUNIT_ASSERT(memIn.IsOk()); wxImage tgaImage; CPPUNIT_ASSERT( !tgaImage.LoadFile(memIn) ); /* Instead of repeating a pixel 127+1 times, now tell it there will follow 127+1 uncompressed pixels (while we only should have 1 in total). */ corruptTGA[18] = 0x7f; CPPUNIT_ASSERT( !tgaImage.LoadFile(memIn) ); } static void TestGIFComment(const wxString& comment) { wxImage image("horse.gif"); image.SetOption(wxIMAGE_OPTION_GIF_COMMENT, comment); wxMemoryOutputStream memOut; CPPUNIT_ASSERT(image.SaveFile(memOut, wxBITMAP_TYPE_GIF)); wxMemoryInputStream memIn(memOut); CPPUNIT_ASSERT( image.LoadFile(memIn) ); CPPUNIT_ASSERT_EQUAL(comment, image.GetOption(wxIMAGE_OPTION_GIF_COMMENT)); } void ImageTestCase::GIFComment() { // Test reading a comment. wxImage image("horse.gif"); CPPUNIT_ASSERT_EQUAL(" Imported from GRADATION image: gray", image.GetOption(wxIMAGE_OPTION_GIF_COMMENT)); // Test writing a comment and reading it back. TestGIFComment("Giving the GIF a gifted giraffe as a gift"); // Test writing and reading a comment again but with a long comment. TestGIFComment(wxString(wxT('a'), 256) + wxString(wxT('b'), 256) + wxString(wxT('c'), 256)); // Test writing comments in an animated GIF and reading them back. CPPUNIT_ASSERT( image.LoadFile("horse.gif") ); wxImageArray images; int i; for (i = 0; i < 4; ++i) { if (i) { images.Add( images[i-1].Rotate90() ); images[i].SetPalette(images[0].GetPalette()); } else { images.Add(image); } images[i].SetOption(wxIMAGE_OPTION_GIF_COMMENT, wxString::Format("GIF comment for frame #%d", i+1)); } wxMemoryOutputStream memOut; CPPUNIT_ASSERT( wxGIFHandler().SaveAnimation(images, &memOut) ); wxGIFHandler handler; wxMemoryInputStream memIn(memOut); CPPUNIT_ASSERT(memIn.IsOk()); const int imageCount = handler.GetImageCount(memIn); for (i = 0; i < imageCount; ++i) { wxFileOffset pos = memIn.TellI(); CPPUNIT_ASSERT( handler.LoadFile(&image, memIn, true /*verbose?*/, i) ); CPPUNIT_ASSERT_EQUAL( wxString::Format("GIF comment for frame #%d", i+1), image.GetOption(wxIMAGE_OPTION_GIF_COMMENT)); memIn.SeekI(pos); } } void ImageTestCase::DibPadding() { /* There used to be an error with calculating the DWORD aligned scan line pitch for a BMP/ICO resulting in buffer overwrites (with at least MSVC9 Debug this gave a heap corruption assertion when saving the mask of an ICO). Test for it here. */ wxImage image("horse.gif"); CPPUNIT_ASSERT( image.IsOk() ); image = image.Scale(99, 99); CompareImage(*wxImage::FindHandler(wxBITMAP_TYPE_ICO), image, wxIMAGE_HAVE_PALETTE); } #endif //wxUSE_IMAGE /* TODO: add lots of more tests to wxImage functions */