-/*
- * Program: image
- *
- * Author: Robert Roebling
- *
- * Copyright: (C) 1998, Robert Roebling
- *
- */
+///////////////////////////////////////////////////////////////////////////////
+// Name: samples/image/image.cpp
+// Purpose: sample showing operations with wxImage
+// Author: Robert Roebling
+// Modified by: Francesco Montorsi
+// Created: 1998
+// RCS-ID: $Id$
+// Copyright: (c) 1998-2005 Robert Roebling
+// (c) 2005-2009 Vadim Zeitlin
+// Licence: wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"
#endif
#ifndef WX_PRECOMP
-#include "wx/wx.h"
+ #include "wx/wx.h"
#endif
#include "wx/image.h"
-
#include "wx/file.h"
+#include "wx/filename.h"
+#include "wx/graphics.h"
+#include "wx/mstream.h"
+#include "wx/wfstream.h"
+#include "wx/quantize.h"
+#include "wx/scopedptr.h"
+#include "wx/stopwatch.h"
+#include "wx/versioninfo.h"
+
+#if wxUSE_CLIPBOARD
+ #include "wx/dataobj.h"
+ #include "wx/clipbrd.h"
+#endif // wxUSE_CLIPBOARD
+
+#if defined(__WXMSW__)
+ #ifdef wxHAVE_RAW_BITMAP
+ #include "wx/rawbmp.h"
+ #endif
+#endif
-#include "smile.xbm"
+#if defined(__WXMAC__) || defined(__WXGTK__)
+ #define wxHAVE_RAW_BITMAP
+ #include "wx/rawbmp.h"
+#endif
-// derived classes
+#include "canvas.h"
-class MyFrame;
-class MyApp;
+#ifndef wxHAS_IMAGES_IN_RESOURCES
+ #include "../sample.xpm"
+#endif
-// MyCanvas
+// ============================================================================
+// declarations
+// ============================================================================
-class MyCanvas: public wxScrolledWindow
+//-----------------------------------------------------------------------------
+// MyApp
+//-----------------------------------------------------------------------------
+
+class MyApp: public wxApp
{
public:
- MyCanvas() {};
- MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size );
- ~MyCanvas();
- void OnPaint( wxPaintEvent &event );
- void CreateAntiAliasedBitmap();
-
- wxBitmap *my_horse_png;
- wxBitmap *my_horse_jpeg;
- wxBitmap *my_horse_gif;
- wxBitmap *my_horse_bmp;
- wxBitmap *my_horse_pcx;
- wxBitmap *my_horse_pnm;
- wxBitmap *my_horse_tiff;
- wxBitmap *my_smile_xbm;
- wxBitmap *my_square;
- wxBitmap *my_anti;
-
-private:
- DECLARE_DYNAMIC_CLASS(MyCanvas)
- DECLARE_EVENT_TABLE()
+ virtual bool OnInit();
};
+// ----------------------------------------------------------------------------
// MyFrame
+// ----------------------------------------------------------------------------
class MyFrame: public wxFrame
{
MyFrame();
void OnAbout( wxCommandEvent &event );
+ void OnNewFrame( wxCommandEvent &event );
+ void OnImageInfo( wxCommandEvent &event );
+ void OnThumbnail( wxCommandEvent &event );
+
+#ifdef wxHAVE_RAW_BITMAP
+ void OnTestRawBitmap( wxCommandEvent &event );
+#endif // wxHAVE_RAW_BITMAP
+#if wxUSE_GRAPHICS_CONTEXT
+ void OnTestGraphics(wxCommandEvent& event);
+#endif // wxUSE_GRAPHICS_CONTEXT
void OnQuit( wxCommandEvent &event );
+#if wxUSE_CLIPBOARD
+ void OnCopy(wxCommandEvent& event);
+ void OnPaste(wxCommandEvent& event);
+#endif // wxUSE_CLIPBOARD
+
MyCanvas *m_canvas;
private:
+ // ask user for the file name and try to load an image from it
+ //
+ // return the file path on success, empty string if we failed to load the
+ // image or were cancelled by user
+ static wxString LoadUserImage(wxImage& image);
+
+
DECLARE_DYNAMIC_CLASS(MyFrame)
DECLARE_EVENT_TABLE()
};
-// MyApp
+// ----------------------------------------------------------------------------
+// Frame used for showing a standalone image
+// ----------------------------------------------------------------------------
-class MyApp: public wxApp
+enum
{
-public:
- virtual bool OnInit();
+ ID_ROTATE_LEFT = wxID_HIGHEST+1,
+ ID_ROTATE_RIGHT,
+ ID_RESIZE,
+ ID_PAINT_BG
};
-// main program
-
-IMPLEMENT_APP(MyApp)
-
-// MyCanvas
+class MyImageFrame : public wxFrame
+{
+public:
+ MyImageFrame(wxFrame *parent, const wxString& desc, const wxImage& image)
+ {
+ Create(parent, desc, wxBitmap(image), image.GetImageCount(desc));
+ }
-IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
+ MyImageFrame(wxFrame *parent, const wxString& desc, const wxBitmap& bitmap)
+ {
+ Create(parent, desc, bitmap);
+ }
-BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
- EVT_PAINT(MyCanvas::OnPaint)
-END_EVENT_TABLE()
+private:
+ bool Create(wxFrame *parent,
+ const wxString& desc,
+ const wxBitmap& bitmap,
+ int numImages = 1)
+ {
+ if ( !wxFrame::Create(parent, wxID_ANY,
+ wxString::Format(wxT("Image from %s"), desc),
+ wxDefaultPosition, wxDefaultSize,
+ wxDEFAULT_FRAME_STYLE | wxFULL_REPAINT_ON_RESIZE) )
+ return false;
+
+ m_bitmap = bitmap;
+ m_zoom = 1.;
+
+ wxMenu *menu = new wxMenu;
+ menu->Append(wxID_SAVEAS);
+ menu->AppendSeparator();
+ menu->AppendCheckItem(ID_PAINT_BG, wxT("&Paint background"),
+ "Uncheck this for transparent images");
+ menu->AppendSeparator();
+ menu->Append(ID_RESIZE, wxT("&Fit to window\tCtrl-F"));
+ menu->Append(wxID_ZOOM_IN, "Zoom &in\tCtrl-+");
+ menu->Append(wxID_ZOOM_OUT, "Zoom &out\tCtrl--");
+ menu->Append(wxID_ZOOM_100, "Reset zoom to &100%\tCtrl-1");
+ menu->AppendSeparator();
+ menu->Append(ID_ROTATE_LEFT, wxT("Rotate &left\tCtrl-L"));
+ menu->Append(ID_ROTATE_RIGHT, wxT("Rotate &right\tCtrl-R"));
+
+ wxMenuBar *mbar = new wxMenuBar;
+ mbar->Append(menu, wxT("&Image"));
+ SetMenuBar(mbar);
+
+ mbar->Check(ID_PAINT_BG, true);
+
+ CreateStatusBar(2);
+ if ( numImages != 1 )
+ SetStatusText(wxString::Format("%d images", numImages), 1);
+
+ SetClientSize(bitmap.GetWidth(), bitmap.GetHeight());
+
+ UpdateStatusBar();
+
+ Show();
+
+ return true;
+ }
-MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
- const wxPoint &pos, const wxSize &size )
- : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER )
-{
- my_horse_png = (wxBitmap*) NULL;
- my_horse_jpeg = (wxBitmap*) NULL;
- my_horse_gif = (wxBitmap*) NULL;
- my_horse_bmp = (wxBitmap*) NULL;
- my_horse_pcx = (wxBitmap*) NULL;
- my_horse_pnm = (wxBitmap*) NULL;
- my_horse_tiff = (wxBitmap*) NULL;
- my_smile_xbm = (wxBitmap*) NULL;
- my_square = (wxBitmap*) NULL;
- my_anti = (wxBitmap*) NULL;
-
- SetBackgroundColour(* wxWHITE);
-
- wxBitmap bitmap( 100, 100 );
-
- wxMemoryDC dc;
- dc.SelectObject( bitmap );
- dc.SetBrush( wxBrush( "orange", wxSOLID ) );
- dc.SetPen( *wxBLACK_PEN );
- dc.DrawRectangle( 0, 0, 100, 100 );
- dc.SetBrush( *wxWHITE_BRUSH );
- dc.DrawRectangle( 20, 20, 60, 60 );
- dc.SelectObject( wxNullBitmap );
-
- // try to find the directory with our images
- wxString dir;
- if ( wxFile::Exists("./horse.png") )
- dir = "./";
- else if ( wxFile::Exists("../horse.png") )
- dir = "../";
- else
- wxLogWarning("Can't find image files in either '.' or '..'!");
+ void OnEraseBackground(wxEraseEvent& WXUNUSED(event))
+ {
+ // do nothing here to be able to see how transparent images are shown
+ }
- wxImage image( bitmap );
+ void OnPaint(wxPaintEvent& WXUNUSED(event))
+ {
+ wxPaintDC dc(this);
- if ( !image.SaveFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG ) )
- wxLogError("Can't save file");
+ if ( GetMenuBar()->IsChecked(ID_PAINT_BG) )
+ dc.Clear();
- if ( !image.LoadFile( dir + wxString("horse.png"), wxBITMAP_TYPE_PNG ) )
- wxLogError("Can't load PNG image");
- else
- my_horse_png = new wxBitmap( image.ConvertToBitmap() );
+ dc.SetUserScale(m_zoom, m_zoom);
- if ( !image.LoadFile( dir + wxString("horse.jpg") ) )
- wxLogError("Can't load JPG image");
- else
- my_horse_jpeg = new wxBitmap( image.ConvertToBitmap() );
+ const wxSize size = GetClientSize();
+ dc.DrawBitmap
+ (
+ m_bitmap,
+ dc.DeviceToLogicalX((size.x - m_zoom*m_bitmap.GetWidth())/2),
+ dc.DeviceToLogicalY((size.y - m_zoom*m_bitmap.GetHeight())/2),
+ true /* use mask */
+ );
+ }
-#if wxUSE_GIF
- if ( !image.LoadFile( dir + wxString("horse.gif") ) )
- wxLogError("Can't load GIF image");
- else
- my_horse_gif = new wxBitmap( image.ConvertToBitmap() );
+ void OnSave(wxCommandEvent& WXUNUSED(event))
+ {
+#if wxUSE_FILEDLG
+ wxImage image = m_bitmap.ConvertToImage();
+
+ wxString savefilename = wxFileSelector( wxT("Save Image"),
+ wxEmptyString,
+ wxEmptyString,
+ wxEmptyString,
+ wxT("BMP files (*.bmp)|*.bmp|")
+#if wxUSE_LIBPNG
+ wxT("PNG files (*.png)|*.png|")
#endif
-
-#if wxUSE_PCX
- if ( !image.LoadFile( dir + wxString("horse.pcx"), wxBITMAP_TYPE_PCX ) )
- wxLogError("Can't load PCX image");
- else
- my_horse_pcx = new wxBitmap( image.ConvertToBitmap() );
+#if wxUSE_LIBJPEG
+ wxT("JPEG files (*.jpg)|*.jpg|")
#endif
-
- if ( !image.LoadFile( dir + wxString("horse.bmp"), wxBITMAP_TYPE_BMP ) )
- wxLogError("Can't load BMP image");
- else
- my_horse_bmp = new wxBitmap( image.ConvertToBitmap() );
-
-#if wxUSE_PNM
- if ( !image.LoadFile( dir + wxString("horse.pnm"), wxBITMAP_TYPE_PNM ) )
- wxLogError("Can't load PNM image");
- else
- my_horse_pnm = new wxBitmap( image.ConvertToBitmap() );
+#if wxUSE_GIF
+ wxT("GIF files (*.gif)|*.gif|")
#endif
-
#if wxUSE_LIBTIFF
- if ( !image.LoadFile( dir + wxString("horse.tif"), wxBITMAP_TYPE_TIF ) )
- wxLogError("Can't load TIFF image");
- else
- my_horse_tiff = new wxBitmap( image.ConvertToBitmap() );
+ wxT("TIFF files (*.tif)|*.tif|")
+#endif
+#if wxUSE_PCX
+ wxT("PCX files (*.pcx)|*.pcx|")
+#endif
+#if wxUSE_XPM
+ wxT("X PixMap files (*.xpm)|*.xpm|")
#endif
+ wxT("ICO files (*.ico)|*.ico|")
+ wxT("CUR files (*.cur)|*.cur"),
+ wxFD_SAVE | wxFD_OVERWRITE_PROMPT,
+ this);
+
+ if ( savefilename.empty() )
+ return;
+
+ wxString extension;
+ wxFileName::SplitPath(savefilename, NULL, NULL, &extension);
+
+ bool saved = false;
+ if ( extension == wxT("bmp") )
+ {
+ static const int bppvalues[] =
+ {
+ wxBMP_1BPP,
+ wxBMP_1BPP_BW,
+ wxBMP_4BPP,
+ wxBMP_8BPP,
+ wxBMP_8BPP_GREY,
+ wxBMP_8BPP_RED,
+ wxBMP_8BPP_PALETTE,
+ wxBMP_24BPP
+ };
+
+ const wxString bppchoices[] =
+ {
+ wxT("1 bpp color"),
+ wxT("1 bpp B&W"),
+ wxT("4 bpp color"),
+ wxT("8 bpp color"),
+ wxT("8 bpp greyscale"),
+ wxT("8 bpp red"),
+ wxT("8 bpp own palette"),
+ wxT("24 bpp")
+ };
+
+ int bppselection = wxGetSingleChoiceIndex(wxT("Set BMP BPP"),
+ wxT("Image sample: save file"),
+ WXSIZEOF(bppchoices),
+ bppchoices,
+ this);
+ if ( bppselection != -1 )
+ {
+ int format = bppvalues[bppselection];
+ image.SetOption(wxIMAGE_OPTION_BMP_FORMAT, format);
+
+ if ( format == wxBMP_8BPP_PALETTE )
+ {
+ unsigned char *cmap = new unsigned char [256];
+ for ( int i = 0; i < 256; i++ )
+ cmap[i] = (unsigned char)i;
+ image.SetPalette(wxPalette(256, cmap, cmap, cmap));
+
+ delete[] cmap;
+ }
+ }
+ }
+#if wxUSE_LIBPNG
+ else if ( extension == wxT("png") )
+ {
+ static const int pngvalues[] =
+ {
+ wxPNG_TYPE_COLOUR,
+ wxPNG_TYPE_COLOUR,
+ wxPNG_TYPE_GREY,
+ wxPNG_TYPE_GREY,
+ wxPNG_TYPE_GREY_RED,
+ wxPNG_TYPE_GREY_RED,
+ };
+
+ const wxString pngchoices[] =
+ {
+ wxT("Colour 8bpp"),
+ wxT("Colour 16bpp"),
+ wxT("Grey 8bpp"),
+ wxT("Grey 16bpp"),
+ wxT("Grey red 8bpp"),
+ wxT("Grey red 16bpp"),
+ };
+
+ int sel = wxGetSingleChoiceIndex(wxT("Set PNG format"),
+ wxT("Image sample: save file"),
+ WXSIZEOF(pngchoices),
+ pngchoices,
+ this);
+ if ( sel != -1 )
+ {
+ image.SetOption(wxIMAGE_OPTION_PNG_FORMAT, pngvalues[sel]);
+ image.SetOption(wxIMAGE_OPTION_PNG_BITDEPTH, sel % 2 ? 16 : 8);
+
+ // these values are taken from OptiPNG with -o3 switch
+ const wxString compressionChoices[] =
+ {
+ wxT("compression = 9, memory = 8, strategy = 0, filter = 0"),
+ wxT("compression = 9, memory = 9, strategy = 0, filter = 0"),
+ wxT("compression = 9, memory = 8, strategy = 1, filter = 0"),
+ wxT("compression = 9, memory = 9, strategy = 1, filter = 0"),
+ wxT("compression = 1, memory = 8, strategy = 2, filter = 0"),
+ wxT("compression = 1, memory = 9, strategy = 2, filter = 0"),
+ wxT("compression = 9, memory = 8, strategy = 0, filter = 5"),
+ wxT("compression = 9, memory = 9, strategy = 0, filter = 5"),
+ wxT("compression = 9, memory = 8, strategy = 1, filter = 5"),
+ wxT("compression = 9, memory = 9, strategy = 1, filter = 5"),
+ wxT("compression = 1, memory = 8, strategy = 2, filter = 5"),
+ wxT("compression = 1, memory = 9, strategy = 2, filter = 5"),
+ };
+
+ int sel = wxGetSingleChoiceIndex(wxT("Select compression option (Cancel to use default)\n"),
+ wxT("PNG Compression Options"),
+ WXSIZEOF(compressionChoices),
+ compressionChoices,
+ this);
+ if (sel != -1)
+ {
+ const int zc[] = {9, 9, 9, 9, 1, 1, 9, 9, 9, 9, 1, 1};
+ const int zm[] = {8, 9, 8, 9, 8, 9, 8, 9, 8, 9, 8, 9};
+ const int zs[] = {0, 0, 1, 1, 2, 2, 0, 0, 1, 1, 2, 2};
+ const int f[] = {0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
+ 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8};
+
+ image.SetOption(wxIMAGE_OPTION_PNG_COMPRESSION_LEVEL , zc[sel]);
+ image.SetOption(wxIMAGE_OPTION_PNG_COMPRESSION_MEM_LEVEL , zm[sel]);
+ image.SetOption(wxIMAGE_OPTION_PNG_COMPRESSION_STRATEGY , zs[sel]);
+ image.SetOption(wxIMAGE_OPTION_PNG_FILTER , f[sel]);
+ image.SetOption(wxIMAGE_OPTION_PNG_COMPRESSION_BUFFER_SIZE, 1048576); // 1 MB
+ }
+ }
+ }
+#endif // wxUSE_LIBPNG
+ else if ( extension == wxT("cur") )
+ {
+ 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:
+ saved = image.SaveFile(savefilename, wxBITMAP_TYPE_CUR);
+ }
+
+ if ( !saved )
+ {
+ // This one guesses image format from filename extension
+ // (it may fail if the extension is not recognized):
+ image.SaveFile(savefilename);
+ }
+#endif // wxUSE_FILEDLG
+ }
- image.LoadFile( dir + wxString("test.png") );
- my_square = new wxBitmap( image.ConvertToBitmap() );
+ void OnResize(wxCommandEvent& WXUNUSED(event))
+ {
+ wxImage img(m_bitmap.ConvertToImage());
- CreateAntiAliasedBitmap();
+ const wxSize size = GetClientSize();
+ img.Rescale(size.x, size.y, wxIMAGE_QUALITY_HIGH);
+ m_bitmap = wxBitmap(img);
- my_smile_xbm = new wxBitmap( (const char*)smile_bits, smile_width,
- smile_height, 1 );
-}
+ UpdateStatusBar();
+ }
-MyCanvas::~MyCanvas()
-{
- delete my_horse_pnm;
- delete my_horse_png;
- delete my_horse_jpeg;
- delete my_horse_gif;
- delete my_horse_bmp;
- delete my_horse_pcx;
- delete my_horse_tiff;
- delete my_smile_xbm;
- delete my_square;
- delete my_anti;
-}
+ void OnZoom(wxCommandEvent& event)
+ {
+ if ( event.GetId() == wxID_ZOOM_IN )
+ m_zoom *= 1.2;
+ else if ( event.GetId() == wxID_ZOOM_OUT )
+ m_zoom /= 1.2;
+ else // wxID_ZOOM_100
+ m_zoom = 1.;
+
+ UpdateStatusBar();
+ }
-void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
-{
- wxPaintDC dc( this );
- PrepareDC( dc );
+ void OnRotate(wxCommandEvent& event)
+ {
+ double angle = 5;
+ if ( event.GetId() == ID_ROTATE_LEFT )
+ angle = -angle;
- dc.DrawText( "Loaded image", 30, 10 );
- if (my_square && my_square->Ok()) dc.DrawBitmap( *my_square, 30, 30 );
+ wxImage img(m_bitmap.ConvertToImage());
+ img = img.Rotate(angle, wxPoint(img.GetWidth() / 2, img.GetHeight() / 2));
+ if ( !img.IsOk() )
+ {
+ wxLogWarning(wxT("Rotation failed"));
+ return;
+ }
- dc.DrawText( "Drawn directly", 150, 10 );
- dc.SetBrush( wxBrush( "orange", wxSOLID ) );
- dc.SetPen( *wxBLACK_PEN );
- dc.DrawRectangle( 150, 30, 100, 100 );
- dc.SetBrush( *wxWHITE_BRUSH );
- dc.DrawRectangle( 170, 50, 60, 60 );
+ m_bitmap = wxBitmap(img);
- if (my_anti && my_anti->Ok())
- dc.DrawBitmap( *my_anti, 280, 30 );
+ UpdateStatusBar();
+ }
- dc.DrawText( "PNG handler", 30, 135 );
- if (my_horse_png && my_horse_png->Ok())
+ void UpdateStatusBar()
{
- 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.DrawBitmap( sub, 280, 210 );
+ wxLogStatus(this, wxT("Image size: (%d, %d), zoom %.2f"),
+ m_bitmap.GetWidth(),
+ m_bitmap.GetHeight(),
+ m_zoom);
+ Refresh();
}
- dc.DrawText( "JPEG handler", 30, 365 );
- if (my_horse_jpeg && my_horse_jpeg->Ok())
- dc.DrawBitmap( *my_horse_jpeg, 30, 380 );
+ wxBitmap m_bitmap;
+ double m_zoom;
- dc.DrawText( "GIF handler", 30, 595 );
- if (my_horse_gif && my_horse_gif->Ok())
- dc.DrawBitmap( *my_horse_gif, 30, 610 );
+ DECLARE_EVENT_TABLE()
+};
- dc.DrawText( "PCX handler", 30, 825 );
- if (my_horse_pcx && my_horse_pcx->Ok())
- dc.DrawBitmap( *my_horse_pcx, 30, 840 );
+#ifdef wxHAVE_RAW_BITMAP
- dc.DrawText( "BMP handler", 30, 1055 );
- if (my_horse_bmp && my_horse_bmp->Ok())
- dc.DrawBitmap( *my_horse_bmp, 30, 1070 );
+#include "wx/rawbmp.h"
- dc.DrawText( "PNM handler", 30, 1285 );
- if (my_horse_pnm && my_horse_pnm->Ok())
- dc.DrawBitmap( *my_horse_pnm, 30, 1300 );
+class MyRawBitmapFrame : public wxFrame
+{
+public:
+ enum
+ {
+ BORDER = 15,
+ SIZE = 150,
+ REAL_SIZE = SIZE - 2*BORDER
+ };
+
+ MyRawBitmapFrame(wxFrame *parent)
+ : wxFrame(parent, wxID_ANY, wxT("Raw bitmaps (how exciting)")),
+ m_bitmap(SIZE, SIZE, 24),
+ m_alphaBitmap(SIZE, SIZE, 32)
+ {
+ SetClientSize(SIZE, SIZE*2+25);
- dc.DrawText( "TIFF handler", 30, 1515 );
- if (my_horse_tiff && my_horse_tiff->Ok())
- dc.DrawBitmap( *my_horse_tiff, 30, 1530 );
+ InitAlphaBitmap();
+ InitBitmap();
- if (my_smile_xbm && my_smile_xbm->Ok())
+ }
+
+ void InitAlphaBitmap()
{
- dc.DrawText( "XBM bitmap", 30, 1745 );
- dc.SetTextForeground( "RED" );
- dc.SetTextBackground( "GREEN" );
- dc.DrawBitmap( *my_smile_xbm, 30, 1760 );
-
- dc.DrawText( "After wxImage conversion", 150, 1745 );
- wxImage i( *my_smile_xbm );
- i.SetMaskColour( 0,0,0 );
- i.Replace( 255,255,255,
- wxRED_PEN->GetColour().Red(),
- wxRED_PEN->GetColour().Green(),
- wxRED_PEN->GetColour().Blue() );
- dc.DrawBitmap( i.ConvertToBitmap(), 150, 1760, TRUE );
+ // First, clear the whole bitmap by making it alpha
+ {
+ wxAlphaPixelData data( m_alphaBitmap, wxPoint(0,0), wxSize(SIZE, SIZE) );
+ if ( !data )
+ {
+ wxLogError(wxT("Failed to gain raw access to bitmap data"));
+ return;
+ }
+ wxAlphaPixelData::Iterator p(data);
+ for ( int y = 0; y < SIZE; ++y )
+ {
+ wxAlphaPixelData::Iterator rowStart = p;
+ for ( int x = 0; x < SIZE; ++x )
+ {
+ p.Alpha() = 0;
+ ++p; // same as p.OffsetX(1)
+ }
+ p = rowStart;
+ p.OffsetY(data, 1);
+ }
+ }
+
+ // Then, draw colourful alpha-blended stripes
+ wxAlphaPixelData data(m_alphaBitmap, wxPoint(BORDER, BORDER),
+ wxSize(REAL_SIZE, REAL_SIZE));
+ if ( !data )
+ {
+ wxLogError(wxT("Failed to gain raw access to bitmap data"));
+ return;
+ }
+
+ wxAlphaPixelData::Iterator p(data);
+
+ for ( int y = 0; y < REAL_SIZE; ++y )
+ {
+ wxAlphaPixelData::Iterator rowStart = p;
+
+ int r = y < REAL_SIZE/3 ? 255 : 0,
+ g = (REAL_SIZE/3 <= y) && (y < 2*(REAL_SIZE/3)) ? 255 : 0,
+ b = 2*(REAL_SIZE/3) <= y ? 255 : 0;
+
+ for ( int x = 0; x < REAL_SIZE; ++x )
+ {
+ // note that RGB must be premultiplied by alpha
+ unsigned a = (wxAlphaPixelData::Iterator::ChannelType)((x*255.)/REAL_SIZE);
+ p.Red() = r * a / 256;
+ p.Green() = g * a / 256;
+ p.Blue() = b * a / 256;
+ p.Alpha() = a;
+
+ ++p; // same as p.OffsetX(1)
+ }
+
+ p = rowStart;
+ p.OffsetY(data, 1);
+ }
}
- dc.SetTextForeground( "BLACK" );
-
- wxBitmap mono( 60,50,1 );
- wxMemoryDC memdc;
- memdc.SelectObject( mono );
- memdc.SetPen( *wxTRANSPARENT_PEN );
- memdc.SetBrush( *wxWHITE_BRUSH );
- memdc.DrawRectangle( 0,0,60,50 );
- memdc.SetTextForeground( *wxBLACK );
- memdc.DrawText( "Hi!", 5, 5 );
- memdc.SetBrush( *wxBLACK_BRUSH );
- memdc.DrawRectangle( 33,5,20,20 );
- memdc.SetPen( *wxRED_PEN );
- memdc.DrawLine( 5, 42, 50, 42 );
- memdc.SelectObject( wxNullBitmap );
- if (mono.Ok())
+
+ void InitBitmap()
{
- dc.DrawText( "Mono bitmap", 30, 1845 );
- dc.SetTextForeground( "RED" );
- dc.SetTextBackground( "GREEN" );
- dc.DrawBitmap( mono, 30, 1860 );
-
- dc.DrawText( "After wxImage conversion", 150, 1845 );
- wxImage i( mono );
- i.SetMaskColour( 255,255,255 );
- i.Replace( 0,0,0,
- wxRED_PEN->GetColour().Red(),
- wxRED_PEN->GetColour().Green(),
- wxRED_PEN->GetColour().Blue() );
- dc.DrawBitmap( i.ConvertToBitmap(), 150, 1860, TRUE );
+ // draw some colourful stripes without alpha
+ wxNativePixelData data(m_bitmap);
+ if ( !data )
+ {
+ wxLogError(wxT("Failed to gain raw access to bitmap data"));
+ return;
+ }
+
+ wxNativePixelData::Iterator p(data);
+ for ( int y = 0; y < SIZE; ++y )
+ {
+ wxNativePixelData::Iterator rowStart = p;
+
+ int r = y < SIZE/3 ? 255 : 0,
+ g = (SIZE/3 <= y) && (y < 2*(SIZE/3)) ? 255 : 0,
+ b = 2*(SIZE/3) <= y ? 255 : 0;
+
+ for ( int x = 0; x < SIZE; ++x )
+ {
+ p.Red() = r;
+ p.Green() = g;
+ p.Blue() = b;
+ ++p; // same as p.OffsetX(1)
+ }
+
+ p = rowStart;
+ p.OffsetY(data, 1);
+ }
}
-}
-void MyCanvas::CreateAntiAliasedBitmap()
-{
- wxBitmap bitmap( 300, 300 );
+ void OnPaint(wxPaintEvent& WXUNUSED(event))
+ {
+ wxPaintDC dc( this );
+ dc.DrawText(wxT("This is alpha and raw bitmap test"), 0, BORDER);
+ dc.DrawText(wxT("This is alpha and raw bitmap test"), 0, SIZE/2 - BORDER);
+ dc.DrawText(wxT("This is alpha and raw bitmap test"), 0, SIZE - 2*BORDER);
+ dc.DrawBitmap( m_alphaBitmap, 0, 0, true /* use mask */ );
+
+ dc.DrawText(wxT("Raw bitmap access without alpha"), 0, SIZE+5);
+ dc.DrawBitmap( m_bitmap, 0, SIZE+5+dc.GetCharHeight());
+ }
- wxMemoryDC dc;
+private:
+ wxBitmap m_bitmap;
+ wxBitmap m_alphaBitmap;
- dc.SelectObject( bitmap );
+ DECLARE_EVENT_TABLE()
+};
- dc.Clear();
+#endif // wxHAVE_RAW_BITMAP
- dc.SetFont( wxFont( 24, wxDECORATIVE, wxNORMAL, wxNORMAL) );
- dc.SetTextForeground( "RED" );
- dc.DrawText( "This is anti-aliased Text.", 20, 20 );
- dc.DrawText( "And a Rectangle.", 20, 60 );
- dc.SetBrush( *wxRED_BRUSH );
- dc.SetPen( *wxTRANSPARENT_PEN );
- dc.DrawRoundedRectangle( 20, 100, 200, 180, 20 );
+// ============================================================================
+// implementations
+// ============================================================================
- wxImage original( bitmap );
- wxImage anti( 150, 150 );
+//-----------------------------------------------------------------------------
+// MyImageFrame
+//-----------------------------------------------------------------------------
- /* This is quite slow, but safe. Use wxImage::GetData() for speed instead. */
+BEGIN_EVENT_TABLE(MyImageFrame, wxFrame)
+ EVT_ERASE_BACKGROUND(MyImageFrame::OnEraseBackground)
+ EVT_PAINT(MyImageFrame::OnPaint)
- for (int y = 1; y < 149; y++)
- for (int x = 1; x < 149; x++)
- {
- int red = original.GetRed( x*2, y*2 ) +
- original.GetRed( x*2-1, y*2 ) +
- original.GetRed( x*2, y*2+1 ) +
- original.GetRed( x*2+1, y*2+1 );
- red = red/4;
-
- int green = original.GetGreen( x*2, y*2 ) +
- original.GetGreen( x*2-1, y*2 ) +
- original.GetGreen( x*2, y*2+1 ) +
- original.GetGreen( x*2+1, y*2+1 );
- green = green/4;
-
- int blue = original.GetBlue( x*2, y*2 ) +
- original.GetBlue( x*2-1, y*2 ) +
- original.GetBlue( x*2, y*2+1 ) +
- original.GetBlue( x*2+1, y*2+1 );
- blue = blue/4;
- anti.SetRGB( x, y, red, green, blue );
- }
- my_anti = new wxBitmap( anti.ConvertToBitmap() );
-}
+ EVT_MENU(wxID_SAVEAS, MyImageFrame::OnSave)
+ EVT_MENU_RANGE(ID_ROTATE_LEFT, ID_ROTATE_RIGHT, MyImageFrame::OnRotate)
+ EVT_MENU(ID_RESIZE, MyImageFrame::OnResize)
-// MyFrame
+ EVT_MENU(wxID_ZOOM_IN, MyImageFrame::OnZoom)
+ EVT_MENU(wxID_ZOOM_OUT, MyImageFrame::OnZoom)
+ EVT_MENU(wxID_ZOOM_100, MyImageFrame::OnZoom)
+END_EVENT_TABLE()
-const int ID_QUIT = 108;
-const int ID_ABOUT = 109;
+//-----------------------------------------------------------------------------
+// MyRawBitmapFrame
+//-----------------------------------------------------------------------------
-IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
+#ifdef wxHAVE_RAW_BITMAP
-BEGIN_EVENT_TABLE(MyFrame,wxFrame)
- EVT_MENU (ID_ABOUT, MyFrame::OnAbout)
- EVT_MENU (ID_QUIT, MyFrame::OnQuit)
+BEGIN_EVENT_TABLE(MyRawBitmapFrame, wxFrame)
+ EVT_PAINT(MyRawBitmapFrame::OnPaint)
END_EVENT_TABLE()
-MyFrame::MyFrame()
- : wxFrame( (wxFrame *)NULL, -1, "wxImage sample",
- wxPoint(20,20), wxSize(470,360) )
-{
- wxMenu *file_menu = new wxMenu();
- file_menu->Append( ID_ABOUT, "&About..");
- file_menu->Append( ID_QUIT, "E&xit");
+#endif // wxHAVE_RAW_BITMAP
- wxMenuBar *menu_bar = new wxMenuBar();
- menu_bar->Append(file_menu, "&File");
+//-----------------------------------------------------------------------------
+// MyFrame
+//-----------------------------------------------------------------------------
- SetMenuBar( menu_bar );
+enum
+{
+ ID_QUIT = wxID_EXIT,
+ ID_ABOUT = wxID_ABOUT,
+ ID_NEW = 100,
+ ID_INFO,
+ ID_SHOWRAW,
+ ID_GRAPHICS,
+ ID_SHOWTHUMBNAIL
+};
- CreateStatusBar(2);
- int widths[] = { -1, 100 };
- SetStatusWidths( 2, widths );
+IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
+BEGIN_EVENT_TABLE(MyFrame, wxFrame)
+ EVT_MENU (ID_ABOUT, MyFrame::OnAbout)
+ EVT_MENU (ID_QUIT, MyFrame::OnQuit)
+ EVT_MENU (ID_NEW, MyFrame::OnNewFrame)
+ EVT_MENU (ID_INFO, MyFrame::OnImageInfo)
+ EVT_MENU (ID_SHOWTHUMBNAIL, MyFrame::OnThumbnail)
+#ifdef wxHAVE_RAW_BITMAP
+ EVT_MENU (ID_SHOWRAW, MyFrame::OnTestRawBitmap)
+#endif
+#if wxUSE_GRAPHICS_CONTEXT
+ EVT_MENU (ID_GRAPHICS, MyFrame::OnTestGraphics)
+#endif // wxUSE_GRAPHICS_CONTEXT
+#if wxUSE_CLIPBOARD
+ EVT_MENU(wxID_COPY, MyFrame::OnCopy)
+ EVT_MENU(wxID_PASTE, MyFrame::OnPaste)
+#endif // wxUSE_CLIPBOARD
+END_EVENT_TABLE()
+
+MyFrame::MyFrame()
+ : wxFrame( (wxFrame *)NULL, wxID_ANY, wxT("wxImage sample"),
+ wxPoint(20, 20), wxSize(950, 700) )
+{
+ SetIcon(wxICON(sample));
- m_canvas = new MyCanvas( this, -1, wxPoint(0,0), wxSize(10,10) );
+ wxMenuBar *menu_bar = new wxMenuBar();
- // 500 width * 1900 height
- m_canvas->SetScrollbars( 10, 10, 50, 200 );
+ wxMenu *menuImage = new wxMenu;
+ menuImage->Append( ID_NEW, wxT("&Show any image...\tCtrl-O"));
+ menuImage->Append( ID_INFO, wxT("Show image &information...\tCtrl-I"));
+#ifdef wxHAVE_RAW_BITMAP
+ menuImage->AppendSeparator();
+ menuImage->Append( ID_SHOWRAW, wxT("Test &raw bitmap...\tCtrl-R"));
+#endif
+#if wxUSE_GRAPHICS_CONTEXT
+ menuImage->AppendSeparator();
+ menuImage->Append(ID_GRAPHICS, "Test &graphics context...\tCtrl-G");
+#endif // wxUSE_GRAPHICS_CONTEXT
+ menuImage->AppendSeparator();
+ menuImage->Append( ID_SHOWTHUMBNAIL, wxT("Test &thumbnail...\tCtrl-T"),
+ "Test scaling the image during load (try with JPEG)");
+ menuImage->AppendSeparator();
+ menuImage->Append( ID_ABOUT, wxT("&About\tF1"));
+ menuImage->AppendSeparator();
+ menuImage->Append( ID_QUIT, wxT("E&xit\tCtrl-Q"));
+ menu_bar->Append(menuImage, wxT("&Image"));
+
+#if wxUSE_CLIPBOARD
+ wxMenu *menuClipboard = new wxMenu;
+ menuClipboard->Append(wxID_COPY, wxT("&Copy test image\tCtrl-C"));
+ menuClipboard->Append(wxID_PASTE, wxT("&Paste image\tCtrl-V"));
+ menu_bar->Append(menuClipboard, wxT("&Clipboard"));
+#endif // wxUSE_CLIPBOARD
+
+ SetMenuBar( menu_bar );
+
+#if wxUSE_STATUSBAR
+ CreateStatusBar(2);
+ int widths[] = { -1, 100 };
+ SetStatusWidths( 2, widths );
+#endif // wxUSE_STATUSBAR
+
+ m_canvas = new MyCanvas( this, wxID_ANY, wxPoint(0,0), wxSize(10,10) );
+
+ // 500 width * 2750 height
+ m_canvas->SetScrollbars( 10, 10, 50, 275 );
+ m_canvas->SetCursor(wxImage("cursor.png"));
}
void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
{
- Close( TRUE );
+ Close( true );
}
+#if wxUSE_ZLIB && wxUSE_STREAMS
+#include "wx/zstream.h"
+#endif
+
void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
{
- (void)wxMessageBox( "wxImage demo\n"
- "Robert Roebling (c) 1998,2000",
- "About wxImage Demo", wxICON_INFORMATION | wxOK );
-}
+ wxArrayString array;
-//-----------------------------------------------------------------------------
-// MyApp
-//-----------------------------------------------------------------------------
+ array.Add("wxImage demo");
+ array.Add("(c) Robert Roebling 1998-2005");
+ array.Add("(c) Vadim Zeitlin 2005-2009");
+
+ array.Add(wxEmptyString);
+ array.Add("Version of the libraries used:");
-bool MyApp::OnInit()
-{
#if wxUSE_LIBPNG
- wxImage::AddHandler( new wxPNGHandler );
+ array.Add(wxPNGHandler::GetLibraryVersionInfo().ToString());
#endif
-
#if wxUSE_LIBJPEG
- wxImage::AddHandler( new wxJPEGHandler );
+ array.Add(wxJPEGHandler::GetLibraryVersionInfo().ToString());
#endif
-
#if wxUSE_LIBTIFF
- wxImage::AddHandler( new wxTIFFHandler );
+ array.Add(wxTIFFHandler::GetLibraryVersionInfo().ToString());
#endif
-
-#if wxUSE_GIF
- wxImage::AddHandler( new wxGIFHandler );
+#if wxUSE_ZLIB && wxUSE_STREAMS
+ // zlib is used by libpng
+ array.Add(wxGetZlibVersionInfo().ToString());
#endif
+ (void)wxMessageBox( wxJoin(array, '\n'),
+ "About wxImage Demo",
+ wxICON_INFORMATION | wxOK );
+}
-#if wxUSE_PCX
- wxImage::AddHandler( new wxPCXHandler );
-#endif
+wxString MyFrame::LoadUserImage(wxImage& image)
+{
+ wxString filename;
-#if wxUSE_PNM
- wxImage::AddHandler( new wxPNMHandler );
-#endif
+#if wxUSE_FILEDLG
+ filename = wxLoadFileSelector(wxT("image"), wxEmptyString);
+ if ( !filename.empty() )
+ {
+ if ( !image.LoadFile(filename) )
+ {
+ wxLogError(wxT("Couldn't load image from '%s'."), filename.c_str());
+
+ return wxEmptyString;
+ }
+ }
+#endif // wxUSE_FILEDLG
+
+ return filename;
+}
+
+void MyFrame::OnNewFrame( wxCommandEvent &WXUNUSED(event) )
+{
+ wxImage image;
+ wxString filename = LoadUserImage(image);
+ if ( !filename.empty() )
+ new MyImageFrame(this, filename, image);
+}
+
+void MyFrame::OnImageInfo( wxCommandEvent &WXUNUSED(event) )
+{
+ wxImage image;
+ if ( !LoadUserImage(image).empty() )
+ {
+ // TODO: show more information about the file
+ wxString info = wxString::Format("Image size: %dx%d",
+ image.GetWidth(),
+ image.GetHeight());
+
+ int xres = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONX),
+ yres = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONY);
+ if ( xres || yres )
+ {
+ info += wxString::Format("\nResolution: %dx%d", xres, yres);
+ switch ( image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONUNIT) )
+ {
+ default:
+ wxFAIL_MSG( "unknown image resolution units" );
+ // fall through
+
+ case wxIMAGE_RESOLUTION_NONE:
+ info += " in default units";
+ break;
+
+ case wxIMAGE_RESOLUTION_INCHES:
+ info += " in";
+ break;
+
+ case wxIMAGE_RESOLUTION_CM:
+ info += " cm";
+ break;
+ }
+ }
+
+ wxLogMessage("%s", info);
+ }
+}
+
+#ifdef wxHAVE_RAW_BITMAP
+
+void MyFrame::OnTestRawBitmap( wxCommandEvent &WXUNUSED(event) )
+{
+ (new MyRawBitmapFrame(this))->Show();
+}
+
+#endif // wxHAVE_RAW_BITMAP
+
+#if wxUSE_GRAPHICS_CONTEXT
+
+class MyGraphicsFrame : public wxFrame
+{
+public:
+ enum
+ {
+ WIDTH = 256,
+ HEIGHT = 90
+ };
+
+ MyGraphicsFrame(wxWindow* parent) :
+ wxFrame(parent, wxID_ANY, "Graphics context test"),
+ m_image(WIDTH, HEIGHT, false)
+ {
+ // Create a test image: it has 3 horizontal primary colour bands with
+ // alpha increasing from left to right.
+ m_image.SetAlpha();
+ unsigned char* alpha = m_image.GetAlpha();
+ unsigned char* data = m_image.GetData();
+
+ for ( int y = 0; y < HEIGHT; y++ )
+ {
+ unsigned char r = 0,
+ g = 0,
+ b = 0;
+ if ( y < HEIGHT/3 )
+ r = 0xff;
+ else if ( y < (2*HEIGHT)/3 )
+ g = 0xff;
+ else
+ b = 0xff;
+
+ for ( int x = 0; x < WIDTH; x++ )
+ {
+ *alpha++ = x;
+ *data++ = r;
+ *data++ = g;
+ *data++ = b;
+ }
+ }
+
+ m_bitmap = wxBitmap(m_image);
+
+ Connect(wxEVT_PAINT, wxPaintEventHandler(MyGraphicsFrame::OnPaint));
+
+ Show();
+ }
+
+private:
+ void OnPaint(wxPaintEvent& WXUNUSED(event))
+ {
+ wxPaintDC dc(this);
+ wxScopedPtr<wxGraphicsContext> gc(wxGraphicsContext::Create(dc));
+ wxGraphicsBitmap gb(gc->CreateBitmapFromImage(m_image));
+
+ gc->SetFont(*wxNORMAL_FONT, *wxBLACK);
+ gc->DrawText("Bitmap", 0, HEIGHT/2);
+ gc->DrawBitmap(m_bitmap, 0, 0, WIDTH, HEIGHT);
+
+ wxGraphicsFont gf = gc->CreateFont(wxNORMAL_FONT->GetPixelSize().y, "");
+ gc->SetFont(gf);
+ gc->DrawText("Graphics bitmap", 0, (3*HEIGHT)/2);
+ gc->DrawBitmap(gb, 0, HEIGHT, WIDTH, HEIGHT);
+ }
+
+ wxImage m_image;
+ wxBitmap m_bitmap;
+
+ wxDECLARE_NO_COPY_CLASS(MyGraphicsFrame);
+};
+
+void MyFrame::OnTestGraphics(wxCommandEvent& WXUNUSED(event))
+{
+ new MyGraphicsFrame(this);
+}
+
+#endif // wxUSE_GRAPHICS_CONTEXT
+
+#if wxUSE_CLIPBOARD
- wxFrame *frame = new MyFrame();
- frame->Show( TRUE );
+void MyFrame::OnCopy(wxCommandEvent& WXUNUSED(event))
+{
+ wxBitmapDataObject *dobjBmp = new wxBitmapDataObject;
+ dobjBmp->SetBitmap(m_canvas->my_horse_png);
+
+ wxTheClipboard->Open();
- return TRUE;
+ if ( !wxTheClipboard->SetData(dobjBmp) )
+ {
+ wxLogError(wxT("Failed to copy bitmap to clipboard"));
+ }
+
+ wxTheClipboard->Close();
}
+void MyFrame::OnPaste(wxCommandEvent& WXUNUSED(event))
+{
+ wxBitmapDataObject dobjBmp;
+
+ wxTheClipboard->Open();
+ if ( !wxTheClipboard->GetData(dobjBmp) )
+ {
+ wxLogMessage(wxT("No bitmap data in the clipboard"));
+ }
+ else
+ {
+ new MyImageFrame(this, wxT("Clipboard"), dobjBmp.GetBitmap());
+ }
+ wxTheClipboard->Close();
+}
+
+#endif // wxUSE_CLIPBOARD
+
+void MyFrame::OnThumbnail( wxCommandEvent &WXUNUSED(event) )
+{
+#if wxUSE_FILEDLG
+ wxString filename = wxLoadFileSelector(wxT("image"), wxEmptyString, wxEmptyString, this);
+ if ( filename.empty() )
+ return;
+
+ static const int THUMBNAIL_WIDTH = 320;
+ static const int THUMBNAIL_HEIGHT = 240;
+
+ wxImage image;
+ image.SetOption(wxIMAGE_OPTION_MAX_WIDTH, THUMBNAIL_WIDTH);
+ image.SetOption(wxIMAGE_OPTION_MAX_HEIGHT, THUMBNAIL_HEIGHT);
+
+ wxStopWatch sw;
+ if ( !image.LoadFile(filename) )
+ {
+ wxLogError(wxT("Couldn't load image from '%s'."), filename.c_str());
+ return;
+ }
+
+ int origWidth = image.GetOptionInt( wxIMAGE_OPTION_ORIGINAL_WIDTH );
+ int origHeight = image.GetOptionInt( wxIMAGE_OPTION_ORIGINAL_HEIGHT );
+
+ const long loadTime = sw.Time();
+
+ MyImageFrame * const frame = new MyImageFrame(this, filename, image);
+ wxLogStatus(frame, "Loaded \"%s\" in %ldms; original size was (%d, %d)",
+ filename, loadTime, origWidth, origHeight);
+#else
+ wxLogError( wxT("Couldn't create file selector dialog") );
+ return;
+#endif // wxUSE_FILEDLG
+}
+
+//-----------------------------------------------------------------------------
+// MyApp
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_APP(MyApp)
+
+bool MyApp::OnInit()
+{
+ if ( !wxApp::OnInit() )
+ return false;
+
+ wxInitAllImageHandlers();
+
+ wxFrame *frame = new MyFrame();
+ frame->Show( true );
+
+ return true;
+}
projects / wxWidgets.git / blobdiff