Neither one nor Many

April 8 2012

I have posted on using allegro 4 with wxWidgets before. Allegro 5 is more easy.

Just the stuff I encountered and how to fix

Fix main conflict


Avoids the following error.

1>MSVCRTD.lib(crtexe.obj) : error LNK2019: unresolved external symbol _main referenced in function ___tmainCRTStartup


#include <allegro5/allegro.h>
#include <allegro5/allegro_image.h>
#include <allegro5/allegro_primitives.h>
#include <allegro5/allegro_font.h>
#include <allegro5/allegro_ttf.h>

Draw ALLEGRO_BITMAP on static canvas

Note that there is no equivalent of Allegro 4's draw_to_hdc() function. With a little grepping in the source code I found out that (for windows anyway) you have functions that do the same in C:\allegro5\src\win\wmcursor.c

Just borrow local_draw_to_hdc from there and use it in the paint event.

staticbitmap->Connect(wxID_STATIC, wxEVT_PAINT, wxPaintEventHandler(SharedMemoryTest::OnPaint), NULL, this);

void SharedMemoryTest::OnPaint( wxPaintEvent& event )
    wxPaintDC dc(wxDynamicCast(event.GetEventObject(), wxWindow));
    WXHDC wxHDC = wxPaintDC::FindDCInCache((wxWindow*) event.GetEventObject());
    HDC hDC = (HDC) wxHDC;

    local_draw_to_hdc(hDC, bmp, 0, 0);
C++ Comments (0)

Leave a Reply

Comment may not be visible immediately, because I process everything manually.**

**) I plan to automate this.., but it's on my ToDo since for ever..

Ray Burgemeestre
february 23th, 1984

C++, Linux, Webdev

Other interests:
Music, Art, Zen