981 lines
29 KiB
C++
981 lines
29 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: samples/image/image.cpp
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// Purpose: sample showing operations with wxImage
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// Author: Robert Roebling
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// Modified by: Francesco Montorsi
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// Created: 1998
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// Copyright: (c) 1998-2005 Robert Roebling
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// (c) 2005-2009 Vadim Zeitlin
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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// For compilers that support precompilation, includes "wx/wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#ifndef WX_PRECOMP
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#include "wx/wx.h"
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#endif
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#include "wx/image.h"
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#include "wx/file.h"
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#include "wx/filename.h"
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#include "wx/graphics.h"
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#include "wx/mstream.h"
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#include "wx/wfstream.h"
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#include "wx/quantize.h"
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#include "wx/scopedptr.h"
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#include "wx/stopwatch.h"
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#include "wx/versioninfo.h"
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#if wxUSE_CLIPBOARD
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#include "wx/dataobj.h"
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#include "wx/clipbrd.h"
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#endif // wxUSE_CLIPBOARD
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#if defined(__WXMSW__)
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#ifdef wxHAVE_RAW_BITMAP
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#include "wx/rawbmp.h"
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#endif
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#endif
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#if defined(__WXMAC__) || defined(__WXGTK__)
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#define wxHAVE_RAW_BITMAP
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#include "wx/rawbmp.h"
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#endif
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#include "canvas.h"
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#ifndef wxHAS_IMAGES_IN_RESOURCES
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#include "../sample.xpm"
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#endif
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// ============================================================================
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// declarations
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// ============================================================================
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//-----------------------------------------------------------------------------
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// MyApp
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//-----------------------------------------------------------------------------
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class MyApp: public wxApp
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{
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public:
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virtual bool OnInit() wxOVERRIDE;
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};
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// ----------------------------------------------------------------------------
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// MyFrame
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// ----------------------------------------------------------------------------
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class MyFrame: public wxFrame
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{
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public:
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MyFrame();
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void OnAbout( wxCommandEvent &event );
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void OnNewFrame( wxCommandEvent &event );
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void OnImageInfo( wxCommandEvent &event );
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void OnThumbnail( wxCommandEvent &event );
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#ifdef wxHAVE_RAW_BITMAP
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void OnTestRawBitmap( wxCommandEvent &event );
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#endif // wxHAVE_RAW_BITMAP
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#if wxUSE_GRAPHICS_CONTEXT
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void OnTestGraphics(wxCommandEvent& event);
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#endif // wxUSE_GRAPHICS_CONTEXT
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void OnQuit( wxCommandEvent &event );
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#if wxUSE_CLIPBOARD
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void OnCopy(wxCommandEvent& event);
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void OnPaste(wxCommandEvent& event);
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#endif // wxUSE_CLIPBOARD
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MyCanvas *m_canvas;
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private:
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// ask user for the file name and try to load an image from it
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//
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// return the file path on success, empty string if we failed to load the
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// image or were cancelled by user
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static wxString LoadUserImage(wxImage& image);
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wxDECLARE_DYNAMIC_CLASS(MyFrame);
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wxDECLARE_EVENT_TABLE();
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};
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// ----------------------------------------------------------------------------
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// Frame used for showing a standalone image
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// ----------------------------------------------------------------------------
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enum
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{
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ID_ROTATE_LEFT = wxID_HIGHEST+1,
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ID_ROTATE_RIGHT,
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ID_RESIZE,
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ID_PAINT_BG
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};
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class MyImageFrame : public wxFrame
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{
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public:
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MyImageFrame(wxFrame *parent, const wxString& desc, const wxImage& image)
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{
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Create(parent, desc, wxBitmap(image), image.GetImageCount(desc));
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}
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MyImageFrame(wxFrame *parent, const wxString& desc, const wxBitmap& bitmap)
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{
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Create(parent, desc, bitmap);
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}
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private:
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bool Create(wxFrame *parent,
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const wxString& desc,
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const wxBitmap& bitmap,
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int numImages = 1)
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{
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if ( !wxFrame::Create(parent, wxID_ANY,
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wxString::Format(wxT("Image from %s"), desc),
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wxDefaultPosition, wxDefaultSize,
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wxDEFAULT_FRAME_STYLE | wxFULL_REPAINT_ON_RESIZE) )
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return false;
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m_bitmap = bitmap;
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m_zoom = 1.;
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wxMenu *menu = new wxMenu;
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menu->Append(wxID_SAVEAS);
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menu->AppendSeparator();
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menu->AppendCheckItem(ID_PAINT_BG, wxT("&Paint background"),
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"Uncheck this for transparent images");
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menu->AppendSeparator();
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menu->Append(ID_RESIZE, wxT("&Fit to window\tCtrl-F"));
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menu->Append(wxID_ZOOM_IN, "Zoom &in\tCtrl-+");
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menu->Append(wxID_ZOOM_OUT, "Zoom &out\tCtrl--");
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menu->Append(wxID_ZOOM_100, "Reset zoom to &100%\tCtrl-1");
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menu->AppendSeparator();
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menu->Append(ID_ROTATE_LEFT, wxT("Rotate &left\tCtrl-L"));
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menu->Append(ID_ROTATE_RIGHT, wxT("Rotate &right\tCtrl-R"));
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wxMenuBar *mbar = new wxMenuBar;
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mbar->Append(menu, wxT("&Image"));
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SetMenuBar(mbar);
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mbar->Check(ID_PAINT_BG, true);
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CreateStatusBar(2);
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if ( numImages != 1 )
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SetStatusText(wxString::Format("%d images", numImages), 1);
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SetClientSize(bitmap.GetWidth(), bitmap.GetHeight());
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UpdateStatusBar();
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Show();
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return true;
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}
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void OnEraseBackground(wxEraseEvent& WXUNUSED(event))
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{
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// do nothing here to be able to see how transparent images are shown
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}
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void OnPaint(wxPaintEvent& WXUNUSED(event))
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{
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wxPaintDC dc(this);
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if ( GetMenuBar()->IsChecked(ID_PAINT_BG) )
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dc.Clear();
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dc.SetUserScale(m_zoom, m_zoom);
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const wxSize size = GetClientSize();
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dc.DrawBitmap
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(
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m_bitmap,
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dc.DeviceToLogicalX((size.x - m_zoom*m_bitmap.GetWidth())/2),
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dc.DeviceToLogicalY((size.y - m_zoom*m_bitmap.GetHeight())/2),
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true /* use mask */
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);
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}
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void OnSave(wxCommandEvent& WXUNUSED(event))
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{
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#if wxUSE_FILEDLG
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wxImage image = m_bitmap.ConvertToImage();
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wxString savefilename = wxFileSelector( wxT("Save Image"),
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wxEmptyString,
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wxEmptyString,
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wxEmptyString,
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wxT("BMP files (*.bmp)|*.bmp|")
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#if wxUSE_LIBPNG
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wxT("PNG files (*.png)|*.png|")
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#endif
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#if wxUSE_LIBJPEG
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wxT("JPEG files (*.jpg)|*.jpg|")
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#endif
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#if wxUSE_GIF
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wxT("GIF files (*.gif)|*.gif|")
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#endif
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#if wxUSE_LIBTIFF
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wxT("TIFF files (*.tif)|*.tif|")
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#endif
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#if wxUSE_PCX
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wxT("PCX files (*.pcx)|*.pcx|")
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#endif
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#if wxUSE_XPM
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wxT("X PixMap files (*.xpm)|*.xpm|")
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#endif
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wxT("ICO files (*.ico)|*.ico|")
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wxT("CUR files (*.cur)|*.cur"),
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wxFD_SAVE | wxFD_OVERWRITE_PROMPT,
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this);
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if ( savefilename.empty() )
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return;
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wxString extension;
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wxFileName::SplitPath(savefilename, NULL, NULL, &extension);
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bool saved = false;
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if ( extension == wxT("bmp") )
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{
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static const int bppvalues[] =
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{
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wxBMP_1BPP,
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wxBMP_1BPP_BW,
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wxBMP_4BPP,
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wxBMP_8BPP,
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wxBMP_8BPP_GREY,
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wxBMP_8BPP_RED,
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wxBMP_8BPP_PALETTE,
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wxBMP_24BPP
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};
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const wxString bppchoices[] =
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{
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wxT("1 bpp color"),
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wxT("1 bpp B&W"),
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wxT("4 bpp color"),
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wxT("8 bpp color"),
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wxT("8 bpp greyscale"),
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wxT("8 bpp red"),
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wxT("8 bpp own palette"),
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wxT("24 bpp")
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};
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int bppselection = wxGetSingleChoiceIndex(wxT("Set BMP BPP"),
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wxT("Image sample: save file"),
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WXSIZEOF(bppchoices),
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bppchoices,
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this);
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if ( bppselection != -1 )
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{
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int format = bppvalues[bppselection];
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image.SetOption(wxIMAGE_OPTION_BMP_FORMAT, format);
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if ( format == wxBMP_8BPP_PALETTE )
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{
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unsigned char *cmap = new unsigned char [256];
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for ( int i = 0; i < 256; i++ )
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cmap[i] = (unsigned char)i;
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image.SetPalette(wxPalette(256, cmap, cmap, cmap));
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delete[] cmap;
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}
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}
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}
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#if wxUSE_LIBPNG
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else if ( extension == wxT("png") )
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{
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static const int pngvalues[] =
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{
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wxPNG_TYPE_COLOUR,
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wxPNG_TYPE_COLOUR,
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wxPNG_TYPE_GREY,
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wxPNG_TYPE_GREY,
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wxPNG_TYPE_GREY_RED,
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wxPNG_TYPE_GREY_RED,
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};
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const wxString pngchoices[] =
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{
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wxT("Colour 8bpp"),
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wxT("Colour 16bpp"),
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wxT("Grey 8bpp"),
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wxT("Grey 16bpp"),
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wxT("Grey red 8bpp"),
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wxT("Grey red 16bpp"),
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};
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int sel = wxGetSingleChoiceIndex(wxT("Set PNG format"),
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wxT("Image sample: save file"),
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WXSIZEOF(pngchoices),
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pngchoices,
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this);
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if ( sel != -1 )
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{
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image.SetOption(wxIMAGE_OPTION_PNG_FORMAT, pngvalues[sel]);
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image.SetOption(wxIMAGE_OPTION_PNG_BITDEPTH, sel % 2 ? 16 : 8);
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// these values are taken from OptiPNG with -o3 switch
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const wxString compressionChoices[] =
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{
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wxT("compression = 9, memory = 8, strategy = 0, filter = 0"),
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wxT("compression = 9, memory = 9, strategy = 0, filter = 0"),
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wxT("compression = 9, memory = 8, strategy = 1, filter = 0"),
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wxT("compression = 9, memory = 9, strategy = 1, filter = 0"),
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wxT("compression = 1, memory = 8, strategy = 2, filter = 0"),
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wxT("compression = 1, memory = 9, strategy = 2, filter = 0"),
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wxT("compression = 9, memory = 8, strategy = 0, filter = 5"),
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wxT("compression = 9, memory = 9, strategy = 0, filter = 5"),
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wxT("compression = 9, memory = 8, strategy = 1, filter = 5"),
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wxT("compression = 9, memory = 9, strategy = 1, filter = 5"),
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wxT("compression = 1, memory = 8, strategy = 2, filter = 5"),
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wxT("compression = 1, memory = 9, strategy = 2, filter = 5"),
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};
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sel = wxGetSingleChoiceIndex(wxT("Select compression option (Cancel to use default)\n"),
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wxT("PNG Compression Options"),
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WXSIZEOF(compressionChoices),
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compressionChoices,
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this);
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if ( sel != -1 )
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{
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const int zc[] = {9, 9, 9, 9, 1, 1, 9, 9, 9, 9, 1, 1};
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const int zm[] = {8, 9, 8, 9, 8, 9, 8, 9, 8, 9, 8, 9};
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const int zs[] = {0, 0, 1, 1, 2, 2, 0, 0, 1, 1, 2, 2};
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const int f[] = {0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
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0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8};
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image.SetOption(wxIMAGE_OPTION_PNG_COMPRESSION_LEVEL , zc[sel]);
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image.SetOption(wxIMAGE_OPTION_PNG_COMPRESSION_MEM_LEVEL , zm[sel]);
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image.SetOption(wxIMAGE_OPTION_PNG_COMPRESSION_STRATEGY , zs[sel]);
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image.SetOption(wxIMAGE_OPTION_PNG_FILTER , f[sel]);
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image.SetOption(wxIMAGE_OPTION_PNG_COMPRESSION_BUFFER_SIZE, 1048576); // 1 MB
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}
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}
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}
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#endif // wxUSE_LIBPNG
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else if ( extension == wxT("cur") )
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{
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image.Rescale(32,32);
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image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, 0);
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image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, 0);
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// This shows how you can save an image with explicitly
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// specified image format:
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saved = image.SaveFile(savefilename, wxBITMAP_TYPE_CUR);
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}
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if ( !saved )
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{
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// This one guesses image format from filename extension
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// (it may fail if the extension is not recognized):
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image.SaveFile(savefilename);
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}
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#endif // wxUSE_FILEDLG
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}
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void OnResize(wxCommandEvent& WXUNUSED(event))
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{
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wxImage img(m_bitmap.ConvertToImage());
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const wxSize size = GetClientSize();
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img.Rescale(size.x, size.y, wxIMAGE_QUALITY_HIGH);
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m_bitmap = wxBitmap(img);
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UpdateStatusBar();
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}
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void OnZoom(wxCommandEvent& event)
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{
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if ( event.GetId() == wxID_ZOOM_IN )
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m_zoom *= 1.2;
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else if ( event.GetId() == wxID_ZOOM_OUT )
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m_zoom /= 1.2;
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else // wxID_ZOOM_100
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m_zoom = 1.;
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UpdateStatusBar();
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}
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void OnRotate(wxCommandEvent& event)
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{
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double angle = 5;
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if ( event.GetId() == ID_ROTATE_LEFT )
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angle = -angle;
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wxImage img(m_bitmap.ConvertToImage());
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img = img.Rotate(angle, wxPoint(img.GetWidth() / 2, img.GetHeight() / 2));
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if ( !img.IsOk() )
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{
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wxLogWarning(wxT("Rotation failed"));
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return;
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}
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m_bitmap = wxBitmap(img);
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UpdateStatusBar();
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}
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void UpdateStatusBar()
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{
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wxLogStatus(this, wxT("Image size: (%d, %d), zoom %.2f"),
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m_bitmap.GetWidth(),
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m_bitmap.GetHeight(),
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m_zoom);
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Refresh();
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}
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wxBitmap m_bitmap;
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double m_zoom;
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wxDECLARE_EVENT_TABLE();
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};
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#ifdef wxHAVE_RAW_BITMAP
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#include "wx/rawbmp.h"
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class MyRawBitmapFrame : public wxFrame
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{
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public:
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enum
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{
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BORDER = 15,
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SIZE = 150,
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REAL_SIZE = SIZE - 2*BORDER
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};
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MyRawBitmapFrame(wxFrame *parent)
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: wxFrame(parent, wxID_ANY, wxT("Raw bitmaps (how exciting)")),
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m_bitmap(SIZE, SIZE, 24),
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m_alphaBitmap(SIZE, SIZE, 32)
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{
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SetClientSize(SIZE, SIZE*2+25);
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InitAlphaBitmap();
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InitBitmap();
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}
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void InitAlphaBitmap()
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{
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// First, clear the whole bitmap by making it alpha
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{
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wxAlphaPixelData data( m_alphaBitmap, wxPoint(0,0), wxSize(SIZE, SIZE) );
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if ( !data )
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{
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wxLogError(wxT("Failed to gain raw access to bitmap data"));
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return;
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}
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wxAlphaPixelData::Iterator p(data);
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for ( int y = 0; y < SIZE; ++y )
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{
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wxAlphaPixelData::Iterator rowStart = p;
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for ( int x = 0; x < SIZE; ++x )
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{
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p.Alpha() = 0;
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++p; // same as p.OffsetX(1)
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}
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p = rowStart;
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p.OffsetY(data, 1);
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}
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}
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// Then, draw colourful alpha-blended stripes
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wxAlphaPixelData data(m_alphaBitmap, wxPoint(BORDER, BORDER),
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wxSize(REAL_SIZE, REAL_SIZE));
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if ( !data )
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{
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wxLogError(wxT("Failed to gain raw access to bitmap data"));
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return;
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}
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wxAlphaPixelData::Iterator p(data);
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for ( int y = 0; y < REAL_SIZE; ++y )
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{
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wxAlphaPixelData::Iterator rowStart = p;
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int r = y < REAL_SIZE/3 ? 255 : 0,
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g = (REAL_SIZE/3 <= y) && (y < 2*(REAL_SIZE/3)) ? 255 : 0,
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b = 2*(REAL_SIZE/3) <= y ? 255 : 0;
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for ( int x = 0; x < REAL_SIZE; ++x )
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{
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// note that RGB must be premultiplied by alpha
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unsigned a = (wxAlphaPixelData::Iterator::ChannelType)((x*255.)/REAL_SIZE);
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p.Red() = r * a / 256;
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p.Green() = g * a / 256;
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p.Blue() = b * a / 256;
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p.Alpha() = a;
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++p; // same as p.OffsetX(1)
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}
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p = rowStart;
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p.OffsetY(data, 1);
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}
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}
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void InitBitmap()
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{
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// draw some colourful stripes without alpha
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wxNativePixelData data(m_bitmap);
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if ( !data )
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{
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wxLogError(wxT("Failed to gain raw access to bitmap data"));
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return;
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}
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|
|
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 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());
|
|
}
|
|
|
|
private:
|
|
wxBitmap m_bitmap;
|
|
wxBitmap m_alphaBitmap;
|
|
|
|
wxDECLARE_EVENT_TABLE();
|
|
};
|
|
|
|
#endif // wxHAVE_RAW_BITMAP
|
|
|
|
|
|
// ============================================================================
|
|
// implementations
|
|
// ============================================================================
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// MyImageFrame
|
|
//-----------------------------------------------------------------------------
|
|
|
|
wxBEGIN_EVENT_TABLE(MyImageFrame, wxFrame)
|
|
EVT_ERASE_BACKGROUND(MyImageFrame::OnEraseBackground)
|
|
EVT_PAINT(MyImageFrame::OnPaint)
|
|
|
|
EVT_MENU(wxID_SAVEAS, MyImageFrame::OnSave)
|
|
EVT_MENU_RANGE(ID_ROTATE_LEFT, ID_ROTATE_RIGHT, MyImageFrame::OnRotate)
|
|
EVT_MENU(ID_RESIZE, MyImageFrame::OnResize)
|
|
|
|
EVT_MENU(wxID_ZOOM_IN, MyImageFrame::OnZoom)
|
|
EVT_MENU(wxID_ZOOM_OUT, MyImageFrame::OnZoom)
|
|
EVT_MENU(wxID_ZOOM_100, MyImageFrame::OnZoom)
|
|
wxEND_EVENT_TABLE()
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// MyRawBitmapFrame
|
|
//-----------------------------------------------------------------------------
|
|
|
|
#ifdef wxHAVE_RAW_BITMAP
|
|
|
|
wxBEGIN_EVENT_TABLE(MyRawBitmapFrame, wxFrame)
|
|
EVT_PAINT(MyRawBitmapFrame::OnPaint)
|
|
wxEND_EVENT_TABLE()
|
|
|
|
#endif // wxHAVE_RAW_BITMAP
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// MyFrame
|
|
//-----------------------------------------------------------------------------
|
|
|
|
enum
|
|
{
|
|
ID_QUIT = wxID_EXIT,
|
|
ID_ABOUT = wxID_ABOUT,
|
|
ID_NEW = 100,
|
|
ID_INFO,
|
|
ID_SHOWRAW,
|
|
ID_GRAPHICS,
|
|
ID_SHOWTHUMBNAIL
|
|
};
|
|
|
|
wxIMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame );
|
|
wxBEGIN_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
|
|
wxEND_EVENT_TABLE()
|
|
|
|
MyFrame::MyFrame()
|
|
: wxFrame( (wxFrame *)NULL, wxID_ANY, wxT("wxImage sample"),
|
|
wxPoint(20, 20), wxSize(950, 700) )
|
|
{
|
|
SetIcon(wxICON(sample));
|
|
|
|
wxMenuBar *menu_bar = new wxMenuBar();
|
|
|
|
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 );
|
|
}
|
|
|
|
#if wxUSE_ZLIB && wxUSE_STREAMS
|
|
#include "wx/zstream.h"
|
|
#endif
|
|
|
|
void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
|
|
{
|
|
wxArrayString array;
|
|
|
|
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:");
|
|
|
|
#if wxUSE_LIBPNG
|
|
array.Add(wxPNGHandler::GetLibraryVersionInfo().ToString());
|
|
#endif
|
|
#if wxUSE_LIBJPEG
|
|
array.Add(wxJPEGHandler::GetLibraryVersionInfo().ToString());
|
|
#endif
|
|
#if wxUSE_LIBTIFF
|
|
array.Add(wxTIFFHandler::GetLibraryVersionInfo().ToString());
|
|
#endif
|
|
#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 );
|
|
}
|
|
|
|
wxString MyFrame::LoadUserImage(wxImage& image)
|
|
{
|
|
wxString filename;
|
|
|
|
#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
|
|
|
|
void MyFrame::OnCopy(wxCommandEvent& WXUNUSED(event))
|
|
{
|
|
wxBitmapDataObject *dobjBmp = new wxBitmapDataObject;
|
|
dobjBmp->SetBitmap(m_canvas->my_horse_png);
|
|
|
|
wxTheClipboard->Open();
|
|
|
|
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
|
|
//-----------------------------------------------------------------------------
|
|
|
|
wxIMPLEMENT_APP(MyApp);
|
|
|
|
bool MyApp::OnInit()
|
|
{
|
|
if ( !wxApp::OnInit() )
|
|
return false;
|
|
|
|
wxInitAllImageHandlers();
|
|
|
|
wxFrame *frame = new MyFrame();
|
|
frame->Show( true );
|
|
|
|
return true;
|
|
}
|