since summer is comming and I'll have a LOT of free time I decided to make my own 2D game engine and some games, however I wanted to ask you several things, I've never worked with opengl or directx, only with console and win32 applications, so, do you think that it will be better to learn opengl/directx or can I do a game engine in win32 api? I thought about simple engine for simple 2d games where I'll just load and display images, move them etc, I've never seen an game engine in plain winapi so that's why I'm asking you that...
also, I started with my engine yesterday and I came accross this problem, when I run the app it will just show dialog without my image (it is transparent image with just BIG black dot in the middle)
I've found a tutorial on how to load and display PNG image with GDI+, however it's not working, and I have no idea why... here's my source code so far
main.cpp
#include <Windows.h>
#include "resource.h"
#include <string>
#include <fstream>
#include <GdiPlus.h>
using namespace std;
using namespace Gdiplus;
GdiplusStartupInput startupInput;
ULONG_PTR token;
Image* ourImage;
HGLOBAL hGlobal;
LPSTREAM pStream;
void getImage();
#pragma comment(linker,"\"/manifestdependency:type='win32' \
name='Microsoft.Windows.Common-Controls' version='6.0.0.0' \
processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'\"")
#pragma comment(lib, "gdiplus.lib")
BOOL CALLBACK MainDlgProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
#define MY_WM_INITDIALOG (WM_USER + 1)
INT WINAPI wWinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPWSTR lpCmdLine, INT nShowCmd)
{
UNREFERENCED_PARAMETER(hPrevInst);
UNREFERENCED_PARAMETER(lpCmdLine);
HMODULE hmodRichEdit = LoadLibrary("Riched20.dll");
if(hmodRichEdit == NULL)
{
MessageBox(NULL, "Can't load RichEdit", NULL, MB_ICONERROR | MB_OK);
return -1;
}
WNDCLASSEX wClass;
ZeroMemory(&wClass,sizeof(WNDCLASSEX));
wClass.cbClsExtra=0;
wClass.cbSize=sizeof(WNDCLASSEX);
wClass.cbWndExtra=DLGWINDOWEXTRA;
wClass.hbrBackground=(HBRUSH)(COLOR_BTNFACE + 1);
wClass.hCursor=LoadCursor(NULL,IDC_ARROW);
wClass.hIcon=NULL;
wClass.hIconSm=NULL;
wClass.hInstance=hInst;
wClass.lpfnWndProc=(WNDPROC)MainDlgProc;
wClass.lpszClassName="Window Class";
wClass.lpszMenuName=MAKEINTRESOURCE(IDR_MENU1);
wClass.style=CS_HREDRAW | CS_VREDRAW;
if(!RegisterClassEx(&wClass))
{
int nResult = GetLastError();
MessageBox(NULL, "Window Class Creation Failed!", NULL, MB_ICONERROR | MB_OK);
return 0;
}
HWND hWnd = CreateDialog(hInst, MAKEINTRESOURCE(IDD_DIALOG1), NULL, NULL);
if(!hWnd)
{
int nResult = GetLastError();
MessageBox(NULL, "Dialog Creation Failed!", NULL, MB_ICONERROR | MB_OK);
return 0;
}
MSG msg;
ZeroMemory(&msg,sizeof(MSG));
while(GetMessage(&msg, NULL, 0, 0) == TRUE)
{
if(!IsDialogMessage(hWnd, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return msg.wParam;
}
BOOL CALLBACK MainDlgProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
HDC hdc;
PAINTSTRUCT ps;
Graphics* gh;
UNREFERENCED_PARAMETER(lParam);
switch(msg)
{
case MY_WM_INITDIALOG:
{
GdiplusStartup(&token,&startupInput,NULL);
getImage();
}
break;
case WM_PAINT:
{
hdc = BeginPaint(hWnd, &ps);
gh = new Graphics(hdc);
gh->DrawImage(ourImage, 10, 10);
delete(gh);
EndPaint(hWnd, &ps);
}
case WM_CREATE:
{
PostMessage(hWnd, MY_WM_INITDIALOG, 0, 0);
}
break;
case WM_DESTROY:
{
PostQuitMessage(0);
return 0;
}
break;
}
return DefWindowProc(hWnd, msg, wParam, lParam);
}
void getImage()
{
HRSRC hRsrc = FindResource(NULL, "IDR_0_1", RT_RCDATA);
HGLOBAL hGlob1 = LoadResource(NULL, hRsrc);
int size = SizeofResource(NULL, hRsrc);
hGlobal = GlobalAlloc(GMEM_FIXED, size);
LPVOID resPtr = LockResource(hGlob1);
memcpy(hGlobal, resPtr, size);
FreeResource(hGlobal);
CreateStreamOnHGlobal(hGlobal, true,&pStream);
ourImage = new Image(pStream, false);
}resource.rc
// Generated by ResEdit 1.5.11
// Copyright (C) 2006-2012
// http://www.resedit.net
#include <windows.h>
#include <commctrl.h>
#include <richedit.h>
#include "resource.h"
LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
IDR_0_1 0 "..\\Release\\Untitled.png"
//
// Menu resources
//
LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
IDR_MENU1 MENU
{
POPUP "File"
{
MENUITEM "Save", IDM_SAVE1
MENUITEM "Load", IDM_LOAD1
MENUITEM "Exit", IDM_EXIT1
}
POPUP "Text"
{
MENUITEM "Change Color", IDM_CHANGE_COLOR1
MENUITEM "Change Scale", IDM_CHANGE_SCALE1
}
POPUP "Help"
{
MENUITEM "About", IDM_ABOUT1
}
}
//
// Dialog resources
//
LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
IDD_DIALOG1 DIALOG 0, 0, 294, 190
STYLE DS_3DLOOK | DS_CENTER | DS_MODALFRAME | DS_SHELLFONT | WS_CAPTION | WS_VISIBLE | WS_POPUP | WS_SYSMENU
EXSTYLE WS_EX_WINDOWEDGE
CAPTION "Dream Journal"
MENU IDR_MENU1
CLASS "Window Class"
FONT 8, "Ms Shell Dlg"
{
//CONTROL "", IDC_TEXT1, RICHEDIT_CLASS, WS_TABSTOP | WS_VSCROLL | WS_BORDER | ES_AUTOVSCROLL | ES_NUMBER | ES_MULTILINE | ES_WANTRETURN, 0, 0, 233, 175
//CONTROL "", IDC_DATE1, DATETIMEPICK_CLASS, WS_TABSTOP | DTS_RIGHTALIGN, 234, 0, 59, 14
//DEFPUSHBUTTON "Save Dream", IDC_SAVE1, 239, 22, 50, 14
//PUSHBUTTON "Load Dream", IDC_LOAD1, 239, 37, 50, 14
}
resource.h
#ifndef IDC_STATIC
#define IDC_STATIC (-1)
#endif
#define IDD_DIALOG1 101
#define IDR_MENU1 103
#define IDR_0_1 104
#define IDC_DATE1 1000
#define IDC_TEXT1 1003
#define IDC_SAVE1 1007
#define IDC_LOAD1 1008
#define IDM_SAVE1 40000
#define IDM_LOAD1 40001
#define IDM_EXIT1 40002
#define IDM_CHANGE_COLOR1 40003
#define IDM_CHANGE_SCALE1 40004
#define IDM_ABOUT1 40005
