wxWidgets and Allegro.... http://www.allegro.cc/forums/view/495839 Allegro.cc Forum Thread matthew@allegro.cc (Matthew Leverton) Thu, 02 Jun 2005 22:12:40 +0000

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.

]]> no-reply@allegro.cc (Slazer) Thu, 02 Jun 2005 07:16:06 +0000

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 ;)).

]]> no-reply@allegro.cc (ReyBrujo) Thu, 02 Jun 2005 07:23:09 +0000
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. :P

]]> no-reply@allegro.cc (Slazer) Thu, 02 Jun 2005 07:37:35 +0000

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}

]]> no-reply@allegro.cc (BAF) Thu, 02 Jun 2005 16:08:05 +0000

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.

]]> no-reply@allegro.cc (Slazer) Thu, 02 Jun 2005 22:12:40 +0000