wxWidgets and Allegro....

wxWidgets and Allegro....

Slazer

Member #1,591

October 2001

I know this question has been asked before by people in the past. I HAVE looked up and read old threads (the best one being at http://www.allegro.cc/forums/view_thread.php?_id=329755) but even that, although kinda helpful, wasn't enough :-/ . I can't even get it working properly. It compiles and runs but the test image (I made it a .bmp instead of .pcx) doesn't display properly... plus I want to do more (read from dat files and such to make tools for a game that'll actually look alright with a decent GUI).

Anyway, ARE there any resources online SOMEWHERE that I'd be able to use to learn how to integrate and use Allegro with wxWidgets? I just need some code that does somethings I want to do (display bitmaps and read from a dat file) and I should be well off.

Thanks for any help.

ReyBrujo

Moderator

January 2001

According to the wxWidgets wiki here, it should not be too difficult. Not many, as you have seen, have tried merging both.

What does "display properly" means? Can you load other pictures? Post some code, I am too lazy to begin from the begining to test something Are you using Windows or Linux?

(OT: According to that wiki, Development has been stuck in the same version for years, there are a lack of core developers (original developer is no longer on the team), and there are some internal disputes which may lead to a fork. Someone should go edit there and put the right facts ).

--
RB
光子「あたしただ…奪う側に回ろうと思っただけよ」
Mitsuko's last words, Battle Royale

Slazer

Member #1,591

October 2001

Quote:

What does "display properly" means?

Look at the attached screenshot. =)

Quote:

Can you load other pictures?

As in other BMPs? I haven't tried. ... Ok I just tried, same thing happens with other BMPs as you see in the screenshot.

And I'm using Win2K. DevC++ Beta 5(4.9.9.2) with the newest (or close to it) Mingw compiler.

1#define  ALLEGRO_NO_MAGIC_MAIN
2#include <allegro.h>
3 
4#ifdef __GNUG__
5#pragma implementation
6#pragma interface
7#endif
8 
9#include <wx/wx.h>
10#include <wx/image.h>
11 
12 
13#include <stdlib.h>
14#include <math.h>
15#include <time.h>
16 
17BITMAP *myBitmap = NULL;
18 
19static bool running = FALSE;                                
20static wxMenuBar *menuBar = NULL;
21 
22// Define a new application type
23class MyApp: public wxApp
24{ public:
25  bool OnInit();
26};
27 
28IMPLEMENT_APP(MyApp)
29 
30// Define a new frame type
31class MyFrame: public wxFrame {
32public:
33  MyFrame(wxFrame *frame, const wxString& title, const wxPoint& pos, const wxSize& size);
34 
35  void OnCloseWindow(wxCloseEvent& event);
36  void OnExit(wxCommandEvent& event);
37  DECLARE_EVENT_TABLE();
38};
39 
40// Define a new canvas which can receive some events
41class MyCanvas: public wxWindow {
42public:
43  MyCanvas(wxFrame *frame);
44  void Draw(wxDC& dc);
45 
46private:
47  void OnPaint(wxPaintEvent& event);
48  void DrawAllegroBitmap(wxDC& dc, int x1, int y1, int x2, int y2, BITMAP *bmp);
49  DECLARE_EVENT_TABLE();
50};
51 
52// `Main program' equivalent, creating windows and returning main app frame
53bool MyApp::OnInit() {
54  // Create the main frame window
55  MyFrame *frame = new MyFrame(NULL, _T("Allegro BITMAP on wxWindows"), wxPoint(-1, -1), wxSize(160, 240));
56 
57  allegro_init();
58  set_color_depth(32);
59 
60  myBitmap = load_bitmap("test.bmp",NULL);
61 
62  // Make a menubar
63  wxMenu *file_menu = new wxMenu;
64  file_menu->Append(wxID_EXIT, _T("E&xit"));
65  menuBar = new wxMenuBar;
66  menuBar->Append(file_menu, _T("&File"));
67  frame->SetMenuBar(menuBar);
68 
69  int width, height;
70  frame->GetClientSize(&width, &height);
71 
72  MyCanvas *ref = new MyCanvas(frame);
73  wxPanel *panel = new wxPanel(ref, -1, wxPoint(0,0), wxSize(160,40),-1,_T("huh?") );
74  wxButton *btn1 = new wxButton( panel, wxID_OK, wxT("E&xit") );
75  //wxButton *btn2 = new wxButton( panel, wxID_OK, wxT("Foobar") );
76  btn1->SetDefault();
77 
78  // Show the frame
79  frame->Show(TRUE);
80  panel->Show(TRUE);
81  return TRUE;
82}
83 
84BEGIN_EVENT_TABLE(MyFrame, wxFrame)
85EVT_CLOSE(MyFrame::OnCloseWindow)
86EVT_MENU(wxID_EXIT, MyFrame::OnExit)
87END_EVENT_TABLE()
88 
89 
90// My frame constructor
91MyFrame::MyFrame(wxFrame *frame, const wxString& title, const wxPoint& pos, const wxSize& size):wxFrame(frame, -1, title, pos, size) {
92 
93}
94 
95// Intercept menu commands
96void MyFrame::OnExit(wxCommandEvent& event) {
97  this->Destroy();
98}
99 
100void MyFrame::OnCloseWindow(wxCloseEvent& event) {
101  static bool destroyed = FALSE;
102  if (destroyed)
103    return;
104 
105  this->Destroy();
106 
107  destroyed = TRUE;
108}
109 
110BEGIN_EVENT_TABLE(MyCanvas, wxWindow)
111EVT_PAINT(MyCanvas::OnPaint)
112END_EVENT_TABLE()
113 
114  // Define a constructor for my canvas
115MyCanvas::MyCanvas(wxFrame *frame):
116  wxWindow(frame, -1) {
117}
118 
119void MyCanvas::OnPaint(wxPaintEvent& event) {
120  wxPaintDC dc(this);
121  Draw(dc);
122}
123 
124void MyCanvas::Draw(wxDC& dc) {
125  if (running) return;
126    
127  running = TRUE;
128  menuBar->EnableTop(0, FALSE);
129    
130  int Right = 0, Bottom = 0, Left = 0, Top = 0;
131  GetClientSize(&Right, &Bottom);
132  DrawAllegroBitmap(dc, Left, Top, Right, Bottom, myBitmap);
133  menuBar->EnableTop(0, TRUE);
134  running = FALSE;
135}
136 
137void MyCanvas::DrawAllegroBitmap(wxDC& dc, int x1, int y1, int x2, int y2, BITMAP *bmp) {
138  BITMAP *tmp = create_bitmap(x2-x1, y2-y1);
139  //stretch_blit(bmp,tmp,0,0,bmp->w, bmp->h, 0,0, tmp->w, tmp->h);
140  draw_sprite(tmp, bmp, 0, 0);
141  wxImage img = wxImage(tmp->w, tmp->h, (unsigned char*)tmp->dat, true);
142  dc.DrawBitmap(img.ConvertToBitmap(),x1,y1,false);
143  destroy_bitmap(tmp);
144}

This code is the exact code from the thread I posted about in my frist post except for the lines:

//stretch_blit(bmp,tmp,0,0,bmp->w, bmp->h, 0,0, tmp->w, tmp->h);
draw_sprite(tmp, bmp, 0, 0);

I just wanted to see if maybe that could have been it but it wasn't. I HAVE tried a few other things too (rather simple ideas) but nothing worked.

As of the OT: I thought the same thing when I read that before, heh.

BAF

Member #2,981

December 2002

I wrote a wx widgets and Allegro thing, and it paints the bitmap loaded from allegro on the screen:

allegrowx.cpp

1#define ALLEGRO_NO_MAGIC_MAIN
2#include <allegro.h>
3#include <winalleg.h>
4 
5#include <wx/wx.h>
6#include <wx/image.h>
7#include <wx/dc.h>
8 
9enum
10{
11  Wizard_Quit = 100,
12  Draw_It = 101
13};
14 
15void blit_from_allegro_to_wx(BITMAP *src, wxDC *target, int sx, int sy, int dx, int dy, int w, int h)
16{
17  //#ifndef WIN32
18  //wxPen *pen;
19  wxPen pn(wxColour(0,0,0), 1, wxDOT);
20  //wxColour cl;
21  for(int x = 0; x < w; ++x)
22  {
23    for(int y = 0; y < h; ++y)
24    {
25      // make the pen
26      /*
27      int color = getpixel(src, sx + x, sy + y);
28      int r = getr(color);
29      int g = getg(color);
30      int b = getb(color);
31      */
32      
33      //pen = new wxPen(wxColour(r, g, b), 1, wxDOT);
34      //cl.Set((int **)src->line[y][x] >> 16, ((int **)src->line[y][x] >> 8) & 0xF, (int **)src->line[y][x] & 0xF);
35      pn.SetColour(((int **)src->line)[y][x] >> 16, (((int **)src->line)[y][x] >> 8) & 0xF, ((int **)src->line)[y][x] & 0xF);
36      // make it active
37      target->SetPen(pn);
38      
39      // "putpixel"
40      target->DrawPoint(dx + x, dy + y);
41      
42      // ok clear up the pen
43      //target->SetPen(wxNullPen);
44      //delete pen;
45    }
46  }
47  //#else
48  //#endif
49}
50 
51class MyApp : public wxApp
52{
53  public:
54    virtual bool OnInit();
55};
56 
57class MyFrame : public wxFrame
58{
59  public:
60    MyFrame(const wxString &title);
61    void OnDraw(wxCommandEvent &event);
62    void OnQuit(wxCommandEvent &event);
63  private:
64    DECLARE_EVENT_TABLE()
65};
66 
67BEGIN_EVENT_TABLE(MyFrame, wxFrame)
68  EVT_MENU(Draw_It, MyFrame::OnDraw)
69  EVT_MENU(Wizard_Quit, MyFrame::OnQuit)
70END_EVENT_TABLE()
71 
72IMPLEMENT_APP(MyApp)
73 
74 
75bool MyApp::OnInit()
76{
77  
78  install_allegro(SYSTEM_NONE, &errno, atexit);
79  set_color_depth(32);
80  
81  MyFrame *frame = new MyFrame(_T("Allegro-wxWidgets Text")); // make the frame
82  
83  frame->Show(true); // show the frame
84  
85  return true;
86}
87 
88MyFrame::MyFrame(const wxString &title) : wxFrame((wxFrame *)NULL, -1, title, wxDefaultPosition, wxSize(800,800))
89{
90  wxMenu *FileMenu = new wxMenu; // make the file menu
91  FileMenu->Append(Draw_It, _T("&Draw It\tAlt-D"), _("Draw the bitmap"));
92  FileMenu->Append(Wizard_Quit, _T("E&xit\tAlt-X"), _T("Quit the test program"));
93  
94  wxMenuBar *MenuBar = new wxMenuBar(); // make the menu bar
95  MenuBar->Append(FileMenu, _T("&File"));
96  
97  SetMenuBar(MenuBar); // use the menu bar
98  
99  CreateStatusBar(); // make the status bar
100}
101 
102void MyFrame::OnDraw(wxCommandEvent &WXUNUSED(event))
103{
104  wxString filename = wxFileSelector(_("Open a BITMAP FILE... like now."), wxT(""), wxT(""), wxT(""), wxT("Bitmap Files|*.bmp"));
105  if (filename == wxEmptyString)
106  {
107    wxMessageBox(_T("You didnt choose a file, silly, try again (File -> Draw)"), _T(":p"), wxOK);
108    return ;
109  }
110  BITMAP *testbmp = load_bitmap(filename.c_str(), NULL);
111  if(testbmp == NULL)
112  {
113    wxMessageBox(_T("Couldn't load iamge"), _T("Error"), wxICON_ERROR | wxOK);
114    return;
115  }
116  // void blit_to_hdc(BITMAP *bitmap, HDC dc, int sx, sy, dx, dy, w, h);
117  /*PAINTSTRUCT ps;
118  HDC hdc;
119  HWND hwnd = (HWND)GetHandle();
120  hdc = BeginPaint(hwnd, &ps);
121  blit_to_hdc(testbmp, hdc, 0, 0, 0, 0, testbmp->w, testbmp->h);
122  EndPaint(hwnd, &ps);*/
123  
124  /*wxScreenDC *bdest = new wxScreenDC;
125  int x, y;
126  GetPosition(&x, &y);
127  //blit_from_allegro_to_wx(testbmp, bdest, 0, 0, x+10, y+10, testbmp->w, testbmp->h);
128  delete bdest;*/
129  
130  wxClientDC *bdest = new wxClientDC(this);
131  blit_from_allegro_to_wx(testbmp, bdest, 0, 0, 0, 0, testbmp->w, testbmp->h);
132  delete bdest;
133  
134  destroy_bitmap(testbmp);
135}
136 
137void MyFrame::OnQuit(wxCommandEvent &WXUNUSED(event))
138{
139  Close(true); // close the app
140}

BAF.zone | SantaHack!

Slazer

Member #1,591

October 2001

I'm at work right now so I can't try out that code but when I get home I will. Thanks for the help and I'll be back if I need it.