When I include gdiplus.h in a program that compiles well the first(there are many) error I get is:
c:\program files (x86)\microsoft sdks\windows\v7.0a\include\GdiplusImaging.h(77): error C2504: 'IUnknown' : base class undefined
Part of GdiplusImaging.h:
IImageBytes : public IUnknown <<< error!
{
public:
...
Why it is so? Where is this IUnknown class? And why it's not in GdiplusImaging.h?
My system is Windows7 x64. VisualStudio 2010.
Including part:
#include <windows.h>
#include <gdiplus.h>
using namespace Gdiplus;
#pragma comment (lib, "gdiplus.lib")
These are the standard includes for using GDI+:
#include <windows.h>
#include <objidl.h>
#include <gdiplus.h>
using namespace Gdiplus;
#pragma comment (lib,"Gdiplus.lib")
You should try to add windows.h and Unknwn.h header before gdiplus.h
#include <Unknwn.h>
#include <windows.h>
#include <gdiplus.h>
Related
Disclaimer: C++ Redefinition Header Files (winsock2.h) doesnt solved my problem
In this project, im trying to take a screenshot and then compressing it with libjpeg-turbo. The problem is that i get errors like
"sockaddr": "struct" Type redefinition
and
"nothl": Redefinition
ScreenWorker.h:
#pragma once
#ifndef SCREENWORKER_H
#define SCREENWORKER_H
#include <string>
#include <vector>
#include <thread>
#include <turbojpeg.h>
#include <Windows.h>
#include "..\API\NetClient.h"
class ScreenWorker {
private:
NetClient* client;
public:
int delay = 30;
ScreenWorker(NetClient* client);
HBITMAP GetScreenBmp(HDC hdc);
void Update();
};
#endif
ScreenWorker.cpp:
#include "ScreenWorker.h"
ScreenWorker::ScreenWorker(NetClient* client) {
this->client = client;
Update();
}
HBITMAP ScreenWorker::GetScreenBmp(HDC hdc) {...}
void ScreenWorker::Update() {...}
The main.cpp (DLL-Entry):
#pragma once
#include "..\..\Base\API\API\GladOSClient.h"
#include "ScreenWorker.h"
using namespace std;
BOOL WINAPI DllMain(HINSTANCE Instance, DWORD Reason, LPVOID Reserved) {
return true;
}
NetClient.h (only Header part):
#pragma once
#ifndef NETCLIENT_H
#define NETCLIENT_H
#define _WINSOCKAPI_
#include <Windows.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#include <vector>
#include <list>
#include <mutex>
#include <map>
#include <string>
#pragma comment (lib, "Ws2_32.lib")
#pragma comment (lib, "Mswsock.lib")
#pragma comment (lib, "AdvApi32.lib")
#include "Utils.h"
#include "PacketHandler.h"
#include "Packet.h"
...
#endif
As you can see, i'm using header-guards everywhere, but nevertheless i get those errors. Seems like there is a problem with the including of "Windows.h"?
Thanks in advance!
Edit
I guess the problem has something to do with the way libjpegturbo handles the including of "Windows.h". Currently i have no real way of solving this issue. Maybe im trying exporting the function i need in a seperated DLL... hopefully this will solve it.
Classic issue.
Just remove this line from NetClient.h
#include <Windows.h>
The inclusion of <Winsock2.h> will pull in <windows.h> for you and correct all those redefine issues.
I have the following "includes" file in my project.
#pragma once
//glm
#include <glm\glm.hpp>
#include <glm\ext.hpp>
#include <glm\gtc\matrix_transform.hpp>
//glew
#include "GL\glew.h"
//glfw
#define GLFW_DLL
#include "GLFW\glfw3.h"
//libpng
#include <png.h>
//std
#include <stdio.h>
#include <vector>
#include <map>
#include <stack>
#include <queue>
#include <list>
#include <memory>
#include <iostream>
#include <fstream>
#include <assert.h>
//boost
#include <boost\filesystem.hpp>
#include <boost\property_tree\json_parser.hpp> /* problem */
//mandala
#include "types.h"
#include "type_traits.h"
#include "hash.h"
#include "macros.h"
When I include <boost\property_tree\json_parser.hpp>, I get many errors indicating that I'm redefining APIENTRY such as this one:
1>c:\program files (x86)\windows kits\8.0\include\shared\minwindef.h(130): warning C4005: 'APIENTRY' : macro redefinition
I'm perplexed as to why this is happening. I've tried to suppress the minwindef.h file from being processed by putting #define _MINWINDEF_ before the include statement but to no avail. Has anyone else encountered this or have any idea how I can properly include this boost library?
NOTE
Since youd did neither update your question to reflect the changes to the includes you made, nor provide the whole warning message, I can only guess:
You still have glfw.h included before the boost lib that includes the WinAPI header. Because when I just google for "APIENTRY redefinition", I get this SO question as first result, including the answer: Put the WinAPI header (or the boost header includign them) before the glfw.h include.
You may want to include also ptree.
#include <boost/property_tree/ptree.hpp>
I'm working on implementing DirectSound into a program, but it requires dsound.h which requires sal.h, and for whatever reason I'm having trouble getting g++ to recognize the fact that I have sal.h and it is in the path file and I can even type in the direct command sal.h and command prompt will open sal.h. But when I compile with
g++-3 World.cpp -c
I get
dsound.h:13:17: sal.h: No such file or directory.
followed by thousands of errors from dsound.h resulting from the lack of sal.h. I'm just using notepad, g++, and command prompt, do I need to be in VC++ for sal.h to work? Is there any way to use DirectSound without it?
Here's the opening to the code I'm compiling, just in case:
#include "WorldEntity.h"
#include "MBox.h"
#include <D3D9.h>
#include <d3dx9.h>
#include <string>
#include <sstream>
#define _USE_MATH_DEFINES
#include <math.h>
#define KEYDOWN(vk_code)((GetAsyncKeyState(vk_code) & 0x8000) ? 1 : 0)
#define KEYUP(vk_code)((GetAsyncKeyState(vk_code) & 0x8000) ? 0 : 1)
using namespace std;
World::World()
{
//Etc
Here is the beginning of WorldEntity.h, the included file that includes dsound.h:
#ifndef WORLDENTITY_H
#define WORLDENTITY_H
class Entity;
class HUD;
#include "Enums.h"
#include "Object.h"
#include "Inventory.h"
#include "AI.h"
#include "Item.h"
#include "Sector.h"
#include "MBox.h"
#include "Particle.h"
#include "Sprite.h"
#include <windows.h>
#include <windows.h>
#include <mmsystem.h>
#include <mmreg.h>
#include <dsound.h>
#include <string>
#include <D3D9.h>
#include <d3dx9.h>
#include <cstdlib>
#include <ctime>
using namespace std;
enum FontIndex
{
//Etc
The command path is not the same as the include path. You have to add the -I flag to GCC to tell it where to find header files:
g++-3 -IC:\some\path World.cpp -c
When I include gdiplus.h in a program that compiles well the first(there are many) error I get is:
c:\program files (x86)\microsoft sdks\windows\v7.0a\include\GdiplusImaging.h(77): error C2504: 'IUnknown' : base class undefined
Part of GdiplusImaging.h:
IImageBytes : public IUnknown <<< error!
{
public:
...
Why it is so? Where is this IUnknown class? And why it's not in GdiplusImaging.h?
My system is Windows7 x64. VisualStudio 2010.
Including part:
#include <windows.h>
#include <gdiplus.h>
using namespace Gdiplus;
#pragma comment (lib, "gdiplus.lib")
These are the standard includes for using GDI+:
#include <windows.h>
#include <objidl.h>
#include <gdiplus.h>
using namespace Gdiplus;
#pragma comment (lib,"Gdiplus.lib")
You should try to add windows.h and Unknwn.h header before gdiplus.h
#include <Unknwn.h>
#include <windows.h>
#include <gdiplus.h>
The line in question is:
extern BOOL logged_in;
Here are my includes:
#define _WIN32_WINNT 0x0403 // Very important for critical sections.
#define WIN32_LEAN_AND_MEAN // Good to use.
#pragma optimize("gsy", on) // Global optimization, Short sequences, Frame pointers.
#pragma comment(linker, "/RELEASE") // Release code
#pragma comment(linker, "/opt:nowin98")
#pragma comment(linker, "/ALIGN:4096") // This will save you some size on the executable.
#pragma comment(linker, "/IGNORE:4108 ") // This is only here for when you use /ALIGN:4096.
#pragma comment(linker, "/ALIGN:4096") // This will save you some size on the executable.
//default headers
#include <windows.h>
#include <stdio.h>
#include <string.h>
#include <winsock2.h>
#include <time.h>
#include <stdlib.h>
#include <Winsvc.h>
#include <winuser.h>
#include <tlhelp32.h>
#include <tchar.h>
#include <shlobj.h>
#include <shlwapi.h>
#include <shellapi.h>
#include <commctrl.h>
#pragma comment(lib, "ws2_32.lib")
#pragma comment(lib, "urlmon.lib")
#pragma comment(lib, "shlwapi.lib")
#pragma comment(lib, "shell32.lib")
Any ideas?
I don't see the line in the above code, but "missing ‘;’ before identifier" means that you are missing a semicolon before that line.