+ image.SaveFile(savefilename);
+ }
+#endif // wxUSE_FILEDLG
+ }
+
+ void OnResize(wxCommandEvent& WXUNUSED(event))
+ {
+ wxImage img(m_bitmap.ConvertToImage());
+
+ const wxSize size = GetClientSize();
+ img.Rescale(size.x, size.y, wxIMAGE_QUALITY_HIGH);
+ m_bitmap = wxBitmap(img);
+
+ UpdateStatusBar();
+ Refresh();
+ }
+
+ void OnRotate(wxCommandEvent& event)
+ {
+ double angle = 5;
+ if ( event.GetId() == ID_ROTATE_LEFT )
+ angle = -angle;
+
+ wxImage img(m_bitmap.ConvertToImage());
+ img = img.Rotate(angle, wxPoint(img.GetWidth() / 2, img.GetHeight() / 2));
+ if ( !img.Ok() )
+ {
+ wxLogWarning(_T("Rotation failed"));
+ return;
+ }
+
+ m_bitmap = wxBitmap(img);
+
+ UpdateStatusBar();
+ Refresh();
+ }
+
+private:
+ void UpdateStatusBar()
+ {
+ wxLogStatus(this, _T("Image size: (%d, %d)"),
+ m_bitmap.GetWidth(),
+ m_bitmap.GetHeight());
+ }
+
+ wxBitmap m_bitmap;
+
+ DECLARE_EVENT_TABLE()
+};
+
+#ifdef wxHAVE_RAW_BITMAP
+
+#include "wx/rawbmp.h"
+
+class MyRawBitmapFrame : public wxFrame
+{
+public:
+ enum
+ {
+ BORDER = 15,
+ SIZE = 150,
+ REAL_SIZE = SIZE - 2*BORDER
+ };
+
+ MyRawBitmapFrame(wxFrame *parent)
+ : wxFrame(parent, wxID_ANY, _T("Raw bitmaps (how exciting)")),
+ m_bitmap(SIZE, SIZE, 24),
+ m_alphaBitmap(SIZE, SIZE, 32)
+ {
+ SetClientSize(SIZE, SIZE*2+25);
+
+ InitAlphaBitmap();
+ InitBitmap();
+
+ }
+
+ void InitAlphaBitmap()
+ {
+ // First, clear the whole bitmap by making it alpha
+ {
+ wxAlphaPixelData data( m_alphaBitmap, wxPoint(0,0), wxSize(SIZE, SIZE) );
+ if ( !data )
+ {
+ wxLogError(_T("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(_T("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);
projects / wxWidgets.git / blobdiff