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added test for loading image from wxMemoryStream

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@15660 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2002-05-24 22:23:24 +00:00
parent 915a955caf
commit 51b07644bb
1 changed files with 103 additions and 80 deletions
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183
samples/image/image.cpp
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@@ -38,7 +38,7 @@ class MyApp;
class MyCanvas: public wxScrolledWindow
{
public:
MyCanvas() {};
MyCanvas() {}
MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size );
~MyCanvas();
void OnPaint( wxPaintEvent &event );
@@ -48,6 +48,7 @@ public:
wxBitmap *my_horse_jpeg;
wxBitmap *my_horse_gif;
wxBitmap *my_horse_bmp;
wxBitmap *my_horse_bmp2;
wxBitmap *my_horse_pcx;
wxBitmap *my_horse_pnm;
wxBitmap *my_horse_tiff;
@@ -56,7 +57,7 @@ public:
wxBitmap *my_horse_ico16;
wxBitmap *my_horse_ico;
wxBitmap *my_horse_cur;
wxBitmap *my_smile_xbm;
wxBitmap *my_square;
wxBitmap *my_anti;
@@ -76,14 +77,14 @@ private:
const int nChoices = 8 ;
static const wxString bppchoices[nChoices] =
{
"1 bpp color",
"1 bpp B&W",
"4 bpp color",
"8 bpp color",
"8 bpp greyscale",
"8 bpp red",
"8 bpp own palette",
"24 bpp"
_T("1 bpp color"),
_T("1 bpp B&W"),
_T("4 bpp color"),
_T("8 bpp color"),
_T("8 bpp greyscale"),
_T("8 bpp red"),
_T("8 bpp own palette"),
_T("24 bpp")
};
static const int bppvalues[nChoices] =
@@ -140,8 +141,8 @@ public:
{
wxImage image = m_bitmap.ConvertToImage();
int bppselection = wxGetSingleChoiceIndex("Set BMP BPP",
"Set BMP BPP",
int bppselection = wxGetSingleChoiceIndex(_T("Set BMP BPP"),
_T("Set BMP BPP"),
nChoices,
bppchoices,
this);
@@ -186,25 +187,25 @@ public:
bool loaded;
wxString extension = savefilename.AfterLast('.').Lower();
if (extension == "cur")
if (extension == _T("cur"))
{
image.Rescale(32,32);
image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, 0);
image.Rescale(32,32);
image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, 0);
image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, 0);
// This shows how you can save an image with explicitly
// specified image format:
loaded = image.SaveFile(savefilename, wxBITMAP_TYPE_CUR);
}
else
else
{
// This one guesses image format from filename extension
// (it may fail if the extension is not recognized):
loaded = image.SaveFile(savefilename);
}
if ( !loaded )
wxMessageBox("No handler for this file type.",
"File was not saved",
wxMessageBox(_T("No handler for this file type."),
_T("File was not saved"),
wxOK|wxCENTRE, this);
}
@@ -251,6 +252,7 @@ MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
my_horse_jpeg = (wxBitmap*) NULL;
my_horse_gif = (wxBitmap*) NULL;
my_horse_bmp = (wxBitmap*) NULL;
my_horse_bmp2 = (wxBitmap*) NULL;
my_horse_pcx = (wxBitmap*) NULL;
my_horse_pnm = (wxBitmap*) NULL;
my_horse_tiff = (wxBitmap*) NULL;
@@ -289,17 +291,17 @@ MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
wxImage image = bitmap.ConvertToImage();
#if wxUSE_LIBPNG
if ( !image.SaveFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG ))
if ( !image.SaveFile( dir + _T("test.png"), wxBITMAP_TYPE_PNG ))
wxLogError(wxT("Can't save file"));
image.Destroy();
image.LoadFile( dir + wxString("test.png") );
image.LoadFile( dir + _T("test.png") );
my_square = new wxBitmap( image );
image.Destroy();
if ( !image.LoadFile( dir + wxString("horse.png")) )
if ( !image.LoadFile( dir + _T("horse.png")) )
wxLogError(wxT("Can't load PNG image"));
else
my_horse_png = new wxBitmap( image );
@@ -308,7 +310,7 @@ MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
#if wxUSE_LIBJPEG
image.Destroy();
if ( !image.LoadFile( dir + wxString("horse.jpg")) )
if ( !image.LoadFile( dir + _T("horse.jpg")) )
wxLogError(wxT("Can't load JPG image"));
else
my_horse_jpeg = new wxBitmap( image );
@@ -318,7 +320,6 @@ MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
image.Destroy();
if ( !image.LoadFile( dir + wxString("horse.gif")))
//if ( !image.LoadFile( wxString("\\slidbar.gif"), wxBITMAP_TYPE_GIF, -2) )
wxLogError(wxT("Can't load GIF image"));
else
my_horse_gif = new wxBitmap( image );
@@ -327,7 +328,7 @@ MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
#if wxUSE_PCX
image.Destroy();
if ( !image.LoadFile( dir + wxString("horse.pcx"), wxBITMAP_TYPE_PCX ) )
if ( !image.LoadFile( dir + _T("horse.pcx"), wxBITMAP_TYPE_PCX ) )
wxLogError(wxT("Can't load PCX image"));
else
my_horse_pcx = new wxBitmap( image );
@@ -335,7 +336,7 @@ MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
image.Destroy();
if ( !image.LoadFile( dir + wxString("horse.bmp"), wxBITMAP_TYPE_BMP ) )
if ( !image.LoadFile( dir + _T("horse.bmp"), wxBITMAP_TYPE_BMP ) )
wxLogError(wxT("Can't load BMP image"));
else
my_horse_bmp = new wxBitmap( image );
@@ -343,19 +344,19 @@ MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
#if wxUSE_XPM
image.Destroy();
if ( !image.LoadFile( dir + wxString("horse.xpm"), wxBITMAP_TYPE_XPM ) )
if ( !image.LoadFile( dir + _T("horse.xpm"), wxBITMAP_TYPE_XPM ) )
wxLogError(wxT("Can't load XPM image"));
else
my_horse_xpm = new wxBitmap( image );
if ( !image.SaveFile( dir + wxString("test.xpm"), wxBITMAP_TYPE_XPM ))
if ( !image.SaveFile( dir + _T("test.xpm"), wxBITMAP_TYPE_XPM ))
wxLogError(wxT("Can't save file"));
#endif
#if wxUSE_PNM
image.Destroy();
if ( !image.LoadFile( dir + wxString("horse.pnm"), wxBITMAP_TYPE_PNM ) )
if ( !image.LoadFile( dir + _T("horse.pnm"), wxBITMAP_TYPE_PNM ) )
wxLogError(wxT("Can't load PNM image"));
else
my_horse_pnm = new wxBitmap( image );
@@ -364,7 +365,7 @@ MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
#if wxUSE_LIBTIFF
image.Destroy();
if ( !image.LoadFile( dir + wxString("horse.tif"), wxBITMAP_TYPE_TIF ) )
if ( !image.LoadFile( dir + _T("horse.tif"), wxBITMAP_TYPE_TIF ) )
wxLogError(wxT("Can't load TIFF image"));
else
my_horse_tiff = new wxBitmap( image );
@@ -378,44 +379,61 @@ MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
#if !defined(__WINDOWS__) || wxUSE_XPM_IN_MSW
// demonstrates XPM automatically using the mask when saving
if ( m_bmpSmileXpm.Ok() )
m_bmpSmileXpm.SaveFile("saved.xpm", wxBITMAP_TYPE_XPM);
m_bmpSmileXpm.SaveFile(_T("saved.xpm"), wxBITMAP_TYPE_XPM);
#endif
#if wxUSE_ICO_CUR
image.Destroy();
if ( !image.LoadFile( dir + wxString("horse.ico"), wxBITMAP_TYPE_ICO, 0 ) )
if ( !image.LoadFile( dir + _T("horse.ico"), wxBITMAP_TYPE_ICO, 0 ) )
wxLogError(wxT("Can't load first ICO image"));
else
my_horse_ico32 = new wxBitmap( image );
image.Destroy();
if ( !image.LoadFile( dir + wxString("horse.ico"), wxBITMAP_TYPE_ICO, 1 ) )
if ( !image.LoadFile( dir + _T("horse.ico"), wxBITMAP_TYPE_ICO, 1 ) )
wxLogError(wxT("Can't load second ICO image"));
else
my_horse_ico16 = new wxBitmap( image );
image.Destroy();
if ( !image.LoadFile( dir + wxString("horse.ico") ) )
if ( !image.LoadFile( dir + _T("horse.ico") ) )
wxLogError(wxT("Can't load best ICO image"));
else
my_horse_ico = new wxBitmap( image );
image.Destroy();
if ( !image.LoadFile( dir + wxString("horse.cur"), wxBITMAP_TYPE_CUR ) )
if ( !image.LoadFile( dir + _T("horse.cur"), wxBITMAP_TYPE_CUR ) )
wxLogError(wxT("Can't load best ICO image"));
else
{
{
my_horse_cur = new wxBitmap( image );
xH = 30 + image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X) ;
yH = 2420 + image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y) ;
}
}
#endif
image.Destroy();
// test image loading from stream
wxFile file(dir + _T("horse.bmp"));
off_t len = file.Length();
void *data = malloc(len);
if ( file.Read(data, len) != len )
wxLogError(_T("Reading bitmap file failed"));
else
{
wxMemoryInputStream mis(data, len);
if ( !image.LoadFile(mis) )
wxLogError(wxT("Can't load BMP image from stream"));
else
my_horse_bmp2 = new wxBitmap( image );
}
free(data);
}
MyCanvas::~MyCanvas()
@@ -425,6 +443,7 @@ MyCanvas::~MyCanvas()
delete my_horse_jpeg;
delete my_horse_gif;
delete my_horse_bmp;
delete my_horse_bmp2;
delete my_horse_pcx;
delete my_horse_tiff;
delete my_horse_xpm;
@@ -442,10 +461,10 @@ void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
wxPaintDC dc( this );
PrepareDC( dc );
dc.DrawText( "Loaded image", 30, 10 );
dc.DrawText( _T("Loaded image"), 30, 10 );
if (my_square && my_square->Ok()) dc.DrawBitmap( *my_square, 30, 30 );
dc.DrawText( "Drawn directly", 150, 10 );
dc.DrawText( _T("Drawn directly"), 150, 10 );
dc.SetBrush( wxBrush( wxT("orange"), wxSOLID ) );
dc.SetPen( *wxBLACK_PEN );
dc.DrawRectangle( 150, 30, 100, 100 );
@@ -455,56 +474,60 @@ void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
if (my_anti && my_anti->Ok())
dc.DrawBitmap( *my_anti, 280, 30 );
dc.DrawText( "PNG handler", 30, 135 );
dc.DrawText( _T("PNG handler"), 30, 135 );
if (my_horse_png && my_horse_png->Ok())
{
dc.DrawBitmap( *my_horse_png, 30, 150 );
wxRect rect(0,0,100,100);
wxBitmap sub( my_horse_png->GetSubBitmap(rect) );
dc.DrawText( "GetSubBitmap()", 280, 190 );
dc.DrawText( _T("GetSubBitmap()"), 280, 190 );
dc.DrawBitmap( sub, 280, 210 );
}
dc.DrawText( "JPEG handler", 30, 365 );
dc.DrawText( _T("JPEG handler"), 30, 365 );
if (my_horse_jpeg && my_horse_jpeg->Ok())
dc.DrawBitmap( *my_horse_jpeg, 30, 380 );
dc.DrawText( "GIF handler", 30, 595 );
dc.DrawText( _T("GIF handler"), 30, 595 );
if (my_horse_gif && my_horse_gif->Ok())
dc.DrawBitmap( *my_horse_gif, 30, 610 );
dc.DrawText( "PCX handler", 30, 825 );
dc.DrawText( _T("PCX handler"), 30, 825 );
if (my_horse_pcx && my_horse_pcx->Ok())
dc.DrawBitmap( *my_horse_pcx, 30, 840 );
dc.DrawText( "BMP handler", 30, 1055 );
dc.DrawText( _T("BMP handler"), 30, 1055 );
if (my_horse_bmp && my_horse_bmp->Ok())
dc.DrawBitmap( *my_horse_bmp, 30, 1070 );
dc.DrawText( "PNM handler", 30, 1285 );
dc.DrawText( _T("BMP read from memory"), 280, 1055 );
if (my_horse_bmp2 && my_horse_bmp2->Ok())
dc.DrawBitmap( *my_horse_bmp2, 280, 1070 );
dc.DrawText( _T("PNM handler"), 30, 1285 );
if (my_horse_pnm && my_horse_pnm->Ok())
dc.DrawBitmap( *my_horse_pnm, 30, 1300 );
dc.DrawText( "TIFF handler", 30, 1515 );
dc.DrawText( _T("TIFF handler"), 30, 1515 );
if (my_horse_tiff && my_horse_tiff->Ok())
dc.DrawBitmap( *my_horse_tiff, 30, 1530 );
dc.DrawText( "XPM handler", 30, 1745 );
dc.DrawText( _T("XPM handler"), 30, 1745 );
if (my_horse_xpm && my_horse_xpm->Ok())
dc.DrawBitmap( *my_horse_xpm, 30, 1760 );
if (my_smile_xbm && my_smile_xbm->Ok())
{
dc.DrawText( "XBM bitmap", 30, 1975 );
dc.DrawText( "(green on red)", 30, 1990 );
dc.SetTextForeground( wxT("GREEN") );
dc.SetTextBackground( wxT("RED") );
dc.DrawText( _T("XBM bitmap"), 30, 1975 );
dc.DrawText( _T("(green on red)"), 30, 1990 );
dc.SetTextForeground( _T("GREEN") );
dc.SetTextBackground( _T("RED") );
dc.DrawBitmap( *my_smile_xbm, 30, 2010 );
dc.SetTextForeground( wxT("BLACK") );
dc.DrawText( "After wxImage conversion", 150, 1975 );
dc.DrawText( "(red on white)", 150, 1990 );
dc.DrawText( _T("After wxImage conversion"), 150, 1975 );
dc.DrawText( _T("(red on white)"), 150, 1990 );
dc.SetTextForeground( wxT("RED") );
wxImage i = my_smile_xbm->ConvertToImage();
i.SetMaskColour( 255, 255, 255 );
@@ -524,7 +547,7 @@ void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
memdc.SetBrush( *wxWHITE_BRUSH );
memdc.DrawRectangle( 0,0,60,50 );
memdc.SetTextForeground( *wxBLACK );
memdc.DrawText( "Hi!", 5, 5 );
memdc.DrawText( _T("Hi!"), 5, 5 );
memdc.SetBrush( *wxBLACK_BRUSH );
memdc.DrawRectangle( 33,5,20,20 );
memdc.SetPen( *wxRED_PEN );
@@ -533,15 +556,15 @@ void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
if (mono.Ok())
{
dc.DrawText( "Mono bitmap", 30, 2095 );
dc.DrawText( "(red on green)", 30, 2110 );
dc.DrawText( _T("Mono bitmap"), 30, 2095 );
dc.DrawText( _T("(red on green)"), 30, 2110 );
dc.SetTextForeground( wxT("RED") );
dc.SetTextBackground( wxT("GREEN") );
dc.DrawBitmap( mono, 30, 2130 );
dc.SetTextForeground( wxT("BLACK") );
dc.DrawText( "After wxImage conversion", 150, 2095 );
dc.DrawText( "(red on white)", 150, 2110 );
dc.DrawText( _T("After wxImage conversion"), 150, 2095 );
dc.DrawText( _T("(red on white)"), 150, 2110 );
dc.SetTextForeground( wxT("RED") );
wxImage i = mono.ConvertToImage();
i.SetMaskColour( 255,255,255 );
@@ -553,38 +576,38 @@ void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
dc.SetTextForeground( wxT("BLACK") );
}
dc.DrawText("XPM bitmap", 30, 2230);
dc.DrawText(_T("XPM bitmap"), 30, 2230);
if ( m_bmpSmileXpm.Ok() )
{
dc.DrawBitmap(m_bmpSmileXpm, 30, 2250, TRUE);
}
dc.DrawText("XPM icon", 150, 2230);
dc.DrawText(_T("XPM icon"), 150, 2230);
if ( m_iconSmileXpm.Ok() )
{
dc.DrawIcon(m_iconSmileXpm, 150, 2250);
}
dc.DrawText( "ICO handler (1st image)", 30, 2290 );
dc.DrawText( _T("ICO handler (1st image)"), 30, 2290 );
if (my_horse_ico32 && my_horse_ico32->Ok())
dc.DrawBitmap( *my_horse_ico32, 30, 2330, TRUE );
dc.DrawText( "ICO handler (2nd image)", 230, 2290 );
dc.DrawText( _T("ICO handler (2nd image)"), 230, 2290 );
if (my_horse_ico16 && my_horse_ico16->Ok())
dc.DrawBitmap( *my_horse_ico16, 230, 2330, TRUE );
dc.DrawText( "ICO handler (best image)", 430, 2290 );
dc.DrawText( _T("ICO handler (best image)"), 430, 2290 );
if (my_horse_ico && my_horse_ico->Ok())
dc.DrawBitmap( *my_horse_ico, 430, 2330, TRUE );
dc.DrawText( "CUR handler", 30, 2390 );
dc.DrawText( _T("CUR handler"), 30, 2390 );
if (my_horse_cur && my_horse_cur->Ok())
{
{
dc.DrawBitmap( *my_horse_cur, 30, 2420, TRUE );
dc.SetPen (*wxRED_PEN);
dc.DrawLine (xH-10,yH,xH+10,yH);
dc.DrawLine (xH,yH-10,xH,yH+10);
}
}
}
void MyCanvas::CreateAntiAliasedBitmap()
@@ -599,8 +622,8 @@ void MyCanvas::CreateAntiAliasedBitmap()
dc.SetFont( wxFont( 24, wxDECORATIVE, wxNORMAL, wxNORMAL) );
dc.SetTextForeground( wxT("RED") );
dc.DrawText( "This is anti-aliased Text.", 20, 20 );
dc.DrawText( "And a Rectangle.", 20, 60 );
dc.DrawText( _T("This is anti-aliased Text."), 20, 20 );
dc.DrawText( _T("And a Rectangle."), 20, 60 );
dc.SetBrush( *wxRED_BRUSH );
dc.SetPen( *wxTRANSPARENT_PEN );
@@ -651,18 +674,18 @@ BEGIN_EVENT_TABLE(MyFrame,wxFrame)
END_EVENT_TABLE()
MyFrame::MyFrame()
: wxFrame( (wxFrame *)NULL, -1, "wxImage sample",
: wxFrame( (wxFrame *)NULL, -1, _T("wxImage sample"),
wxPoint(20,20), wxSize(470,360) )
{
wxMenu *file_menu = new wxMenu();
file_menu->Append( ID_NEW, "&Show image...");
file_menu->Append( ID_NEW, _T("&Show image..."));
file_menu->AppendSeparator();
file_menu->Append( ID_ABOUT, "&About...");
file_menu->Append( ID_ABOUT, _T("&About..."));
file_menu->AppendSeparator();
file_menu->Append( ID_QUIT, "E&xit");
file_menu->Append( ID_QUIT, _T("E&xit"));
wxMenuBar *menu_bar = new wxMenuBar();
menu_bar->Append(file_menu, "&File");
menu_bar->Append(file_menu, _T("&File"));
SetMenuBar( menu_bar );
@@ -683,9 +706,9 @@ void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
{
(void)wxMessageBox( "wxImage demo\n"
"Robert Roebling (c) 1998,2000",
"About wxImage Demo", wxICON_INFORMATION | wxOK );
(void)wxMessageBox( _T("wxImage demo\n")
_T("Robert Roebling (c) 1998,2000"),
_T("About wxImage Demo"), wxICON_INFORMATION | wxOK );
}
void MyFrame::OnNewFrame( wxCommandEvent &WXUNUSED(event) )