So I'm using the sfml frameworks in an XCode project I'm building and I'm having some trouble with the sf::Image() class.
Some of the functions work perfectly fine and as expected, but others give compiler errors.
For example, I can do the following with no errors and it'll print the correct result:
sf::Image *image = new sf::Image(600,600);
int width = image->GetWidth();
int height = image->GetHeight();
std::cout<<width<<" "<<height<<std::endl;
So I know the library is being at least somewhat integrated. However, functions like SaveToFile() and LoadFromFile() give me compiler errors. For example, if I do the following I get an "using undefined symbols for this architecture" error.
std::string filename = "myfile.jpg";
sf::Image *image = new sf::Image(600,600);
image->SaveToFile(filename);
I appreciate any and all help!
Are the SFML dll besides your EXE in your Debug directory?
In my own project, there's 3 dll from SFML which are:
sfml-graphics-2.dll
sfml-system-2.dll
sfml-window-2.dll
Which can be found in the SFML Bin directory. Also, don't forget add the SFML > lib dir to the Library Search Path of your project. Again, don't forget to use the appropriate lib:
sfml-graphics
sfml-window
sfml-system
opengl32
Related
I am trying to get a graphical representation of a chess-board with SFML 2.0. The problem is that I simply cannot load a texture, the command loadFromFile does not work and I don't know why. I already searched the web, also here in Stack Overflow but I did not find a solution.
What I did right now:
Setting all the dependencies for includes and libraries, .dll's and .libs
Changing text format from unicode to multibyte.
Copying the .dll's into the working folder (there was an error that visual studio couldnt find the dlls even though I linked them in the project)
Using the whole path for the image file
using the LoadFile-command with 2 arguments (even though the second one is optional I guess)
Changing runtime library from MDd to MD (trying to get it work in release mode)
Not linking all libraries, but only the ones with a ....-d.lib ending (as supposed in another Stack Overflow thread)
I use Windows 7, Visual Studio Version 15.3.3
This is my code:
#include <SFML/Graphics.hpp>
#include <time.h>
#include <iostream>
int main() {
sf::RenderWindow window(sf::VideoMode(437, 437), "MattseChess!");
sf::Texture t1;
if (!t1.loadFromFile("C:/Users/Mattse/source/repos/Chess/Chess/images/figures.png")) {
std::cout << "Error loading texture" << std::endl;
}
return 0;
}
What shall I try out next?
You should always open files with a relative path ("images/figures.png"). It's relative from the executable.
And check with an other PNG images to see if it does not come from the image that SFML cannot load for any reasons (and try gimp to reexport it with different options like interlacing for example)
I'm guessing (from the C:\Users\ part) you are on a Windows system.
While Windows should support slashes as path separator, the official path separator in Windows is a backslash. It needs to be escaped in C++, so your full path would be:
"C:\\Users\\Mattse\\source\\repos\\Chess\\Chess\\images\\figures.png"
Problem fixed, it was in fact the case that I forgot to delete one library in the linker->input settings. I only have the ones with a -d ending now, even the ones which have NO -d equivalent got deleted.
List of linked libraries:
sfml-audio-d.lib
sfml-graphics-d.lib
sfml-main-d.lib
sfml-network-d.lib
sfml-network-s-d.lib
sfml-system-d.lib
sfml-system-s-d.lib
sfml-window-d.lib
sfml-window-s-d.lib
I want to use gstreamer library for video programming and I read that Qt5.5.0 provided support for gstreamer-1.0, which is the library I use. I downloaded firstly version 1.0.7, but I got the following error, so I downloaded the latest version 1.5.2, which I am trying to use now.
I managed to link the gstreamer library header files, so I didn't build it, but just include its path and access the header files and libs. Anyway, now I have an error of The program has unexpectedly finished. When I try to debug it, I get the following error in a pop-up:
During startup program excited with code 0xc0000135.
On General Messages:
:1:24: Reading only version 1.1 parts.
:10:5: Expected only Component and ModuleApi object definitions.
I read many questions related to this error, but none helped, I think is an error with the gstreamer library, but may be a compiler/debugger error too, as I read in some threads.
I checked my PATH variable, as I also can not run the program outside Qt (by trying to run the .exe in debug folder of the build) - the error : library Qt5Cored.dll missing - and I found this paths:
C:\Qt\Qt5.5.0_Android\5.5\mingw492_32\lib;
C:\Users\user\Documents\build-GStreamer-test5-Desktop_Qt_5_5_0_MinGW_32bit-Debug;
C:\Qt\Qt5.5.0_Android\5.5\mingw492_32\bin;
C:\Qt\Qt5.5.0_Android\Tools\mingw492_32\bin;
C:\Windows\system32; C:\Windows; C:\Windows\System32\Wbem; C:\Windows\System32\WindowsPowerShell\v1.0;
C:\Program Files\Skype\Phone\ (I dont know why is this included, but it was there when I checked )
I am relatively new to Qt, and never encountered this error before. If you need any code:
.pro:
QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = GStreamer-test5
TEMPLATE = app
SOURCES += main.cpp
mainwindow.cpp
HEADERS += mainwindow.h
FORMS += mainwindow.ui
INCLUDEPATH += C:/gstreamer/1.0/x86/include/gstreamer-1.0
C:/gstreamer/1.0/x86/lib/gstreamer-1.0/include
C:/gstreamer/1.0/x86/include/glib-2.0
C:/gstreamer/1.0/x86/lib/glib-2.0/include
LIBS += -L C:/gstreamer/1.0/x86/lib/ -lgstreamer-1.0
and .main:
#include "mainwindow.h"
#include <QApplication>
#include <QDebug>
#include <stdio.h>
#include "gst/gst.h"
void *__gxx_personality_v0;
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
const gchar *nano_str;
guint major, minor, micro, nano;
gst_init (&argc, &argv);
gst_version (&major, &minor, µ, &nano);
if (nano == 1)
nano_str = "(CVS)";
else if (nano == 2)
nano_str = "(Prerelease)";
else
nano_str = "";
// printf ("This program is linked against GStreamer %d.%d.%d %s\n", major, minor, micro, nano_str);
qDebug() << "This program is linked against GStreamer %d.%d.%d %s\n", major, minor, micro, nano_str ;
return a.exec();
Firstly, I had the error :
undefined reference to `__gxx_personality_v0' , but fixed it by adding *void __gxx_personality_v0; , although I don't know what excatly it is.
Its been three days I struggle with this problem. Any help appreciated, or maybe if you can help me by some code on how to access the header files and libs, or how the configuration of the debugger options / PATH must be.
I am using Qt5.5.0 for Android, for Windows I use MinGW 4.9.2 32 bit compiler and GNU gdb 7.8 as debugger.
Thanks in advance!
I had similar problems in my project that was using both Qt and Gstreamer.
The сause of "undefined reference to `__gxx_personality_v0'" error is that Qt and GStreamer for windows from official sites were built using different compilers and their libstdc++ libraries are not compatible - they are using different exception handling methods.
In fact, GStreamer is pure C library. The only component of it that was written in C++ is taglib library. If you will build this lib from sources using your MinGW compiler, and then replace it in the GStreamer folder, the problem of incompatibility will be solved.
In more detail you can read here: https://github.com/knowthelist/knowthelist.
I managed to solve the above problem. I had to include in the .exe folder (the build-debug folder) all the dlls included, so I tried to run the .exe from there, not run it from Qt, and some errors with dlls missing gave me the names of the dlls. I found some in my library bin folder and some downloaded, and now everything seems fine :)
I just compiled zlib and libzip with Cygwin to use them with Code::Blocks in Windows.
My code is that:
#include <iostream>
#include <zip.h>
int main()
{
//Open the ZIP archive
int err = 0;
zip *z = zip_open("main.zip", 0, &err);
zip_close(z);
std::cout << "Hello world!" << std::endl;
return 0;
}
When I build my code, it works well, no errors and warnings.
When I launch my program, it says that I don't have cygzip-2.dll. Okay, I search it and put it in my executable folder. Then, it says that I don't have cygwin1.dll. Okay, I put it too. The same for cygz.dll and cyggcc_s-1.dll.
Oh, it works! But then, my program stops with always the same status: -1073741819.
It doesn't even tell me hello :(
I compiled it with MinGW (it did the same error on Cygwin), and I linked libz.a, libzip.a and libzip.dll.a. Where does the problem could come from?
Thanks!
EDIT: When I try to compile my program IN Cygwin, it says 'undefined reference to '_zip_open'' and 'undefined reference to '_zip_close''. Probably something is missing, but what?
Eventually, I succeeded to use my 2 libraries! I had already tried to use CMake, but failed miserably.
So today, I decided to retry it with the GUI. Firstly, I compiled zlib. I chose the zlib folder, and put the build folder in it. I configured with the option for Code::Blocks and MinGW Makefiles, and native compilers. Then, I opened the .cbp (Code::Blocks Project) in my 'build' folder, and built it.
For libzip, I did the steps except that I specified 2 variables:
ZLIB_INCLUDE_DIR = the root of zlib folder (where there are all the .h and .c) and ZLIB_LIBRARY = [the path to your build folder from zlib]\libzlib.dll
I built it from the .cbp too. And I linked all my files to my project, and it was done!
Context
I'm making a game engine using SDL and OpenGL. I'm trying to find the best way to output text to the screen with fancy true type font and I came across FTGL. (If you have better/easier solution, feel free to share it.)
Compiling FTGL
It requires FreeType2 in order to work so I got it, compiled it (using Code::Block) and then I compiled the FTGL lib using Code::Block too.
I'm using Eclipse Indigo with the CDT plugin. I'm not sure which lib to take, since there are a .lib and a .dll file. I tried both, but this doesn't seem to change my problem at all, which curently is on this line:
FTfont* m_Font = new FTTextureFont(filename.c_str());
The error is:
The type 'FTTextureFont' must implement the inherited pure virtual method 'FTFont::MakeGlyph'
It doesn't change if I use another FTfont subclass, e.g. FTPixmapFont constructor.
Here are the linker flags which I tried:
-lmingw32 -lSDLmain -lSDL -lSDL_image -lSDL_net -lSDL_ttf -lftgl -lfreetype234_D -lopengl32 -lglu32
-lmingw32 -lSDLmain -lSDL -lSDL_image -lSDL_net -lSDL_ttf -lftgl -llibfreetype -lopengl32 -lglu32
I'm using eclipse with MinGW.
I have copied and pasted
the src/FTGL folder and
the content of the Include folder of the freetype library
to the include folder of the MinGW directory.
Both freetype2 (there a are freetype.lib, freetype248_D.lib and freetype-bcc.lib, not sure wich to link in the project properties) and ftgl (ftgl.dll, ftgl_D.lib, ftgl_static_D.lib) lib files into the corresponding lib folder of the MinGW directory.
If I click on the line that has the error and uses the Open Declaration option, eclipse takes me to the FTTextureFont header file which has FTTextureFont(char const*) defined and the MakeGlyph function defined too.
You can find the full code on the GetRandomGame project page if you want to see more, or as a reference.
Here's the Compiler version
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=c:/mingw/bin/../libexec/gcc/mingw32/4.6.1/lto-wrapper.exe
Target: mingw32
Configured with: ../gcc-4.6.1/configure --enable-languages=c,c++,fortran,objc,ob
j-c++ --disable-sjlj-exceptions --with-dwarf2 --enable-shared --enable-libgomp -
-disable-win32-registry --enable-libstdcxx-debug --enable-version-specific-runti
me-libs --build=mingw32 --prefix=/mingw
Thread model: win32
gcc version 4.6.1 (GCC)
EDIT
Similar question: FTGL undefined references everywere?, but the answer of that question doesn't solve my problem, I still get these two errors.
EDIT 2
I was compiling using MSVC when I first tried to use FTGL and had two errors.
I finally used code::block to import the MSVC project provided with both libraries. One of the two errors got solved! But, I still got this one:
The type 'FTTextureFont' must implement the inherited pure virtual method 'FTFont::MakeGlyph'
EDIT 3
I've tried to compile FTGL 2.1.2 with freetype 2.3.4 and that hasn't solved my problem. I've tried FTGL 2.1.3 rc5 with freetype 2.3.4, same thing. Just to be sure, I've also tried freetype 2.3.5 and 2.4.8 (the first time was already 2.4.8).
I've tried moving the MakeGlyph code into the header file, but that hasn't solved the problem.
Here are some useful links i've found, but they haven't solved the problem yet.
OpenGL font rendering with FTGL
Glut and FTGL
EDIT 4
When I remove the ftgl linker flag, the compiler complains about this:
undefined reference to FTPixmapFont::FTPixmapFont(char const*)'
collect2: ld returned 1 exit status
Build error occurred, build is stopped
And I still get the pure virtual method MakeGlyph error.
With the ftgl linker flag, the only error I get is the "must implement the inherited Pure Virtual method MakeGlyph". The compiler builds the project fine (but crashes at start up):
-lmingw32 -lSDLmain -lSDL -lSDL_image -lSDL_net -lSDL_ttf -lfreetype -lftgl -lopengl32 -lglu32
Build complete for project GetRandomGame
So I'm thinking that the FTGL lib isn't compiled correctly since it should have the FTPixmapFont.cpp defining the pure virtual method MakeGlyph. I'm kind of new with all those lib things in c++ and I might be doing something wrong building the lib.
EDIT 5
I have read and seen in an example that I needed to have a config.h file, so I added a properly configured config.h file that comes with FTGL.
Then I found the following code in an example provided in the ftgl directory and I added that to my Font class.
class FTHaloFont : public FTFont
{
public:
FTHaloFont(char const *fontFilePath) : FTFont(fontFilePath) {}
protected:
virtual FTGlyph* MakeGlyph(FT_GlyphSlot slot)
{
return new FTHaloGlyph(slot);
}
};
Even if I define MakeGlyph there, Eclipse complains about an unimplemented pure virtual method FTFont::MakeGlyph.
EDIT 6
I've tried debugging from command line with gdb and it tells me that freetype6.dll can't be found. I'm trying right now to find a solution.
The compiler is telling you that the method FTTextureFont::MakeGlyph has not been written.
You have to either:
Inherit from FTTextureFont and write the MakeGlyph method.
Find a child class of FTTextureFont that does what you want.
According to the FTGL docs, any class derived from FTFont (which FTTextureFont has as a parent) has to implement MakeGlyph.
I'd look for code on the 'net to see what others have done were I you.
You're using wrong class.
The correct class to use is FTGLPixmapFont.
#include <SDL/SDL.h>
#include <GL/glew.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include <common/timer.h>
#include <common/keyboard.h>
#include <FTGL/FTGL.h>
#include <FTGL/FTGLPixmapFont.h>
#include <wchar.h>
#include <math.h>
using Keyboard::keyPressed;
static Timer timer;
static int scrWidth = 640;
static int scrHeight = 480;
int main(int argc, char** argv){
SDL_Init(SDL_INIT_VIDEO);
SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
SDL_GL_SetAttribute(SDL_GL_SWAP_CONTROL, 0);
Keyboard::init();
timer.reset();
timer.setMaxFps(100);
timer.setMinFps(5);
if (SDL_SetVideoMode(scrWidth, scrHeight, 32, SDL_OPENGL) == 0){
fprintf(stderr, "couldn't set mode %dx%d!\n", 640, 480);
SDL_Quit();
return -1;
}
glewInit();
FTGLPixmapFont font("DejaVuSans.ttf");
font.CharMap(ft_encoding_unicode);
font.FaceSize(10);
SDL_ShowCursor(SDL_DISABLE);
glClearColor(0.2, 0.2, 0.2, 0.2);
glClearDepth(1.0);
glEnable(GL_DEPTH_TEST);
bool running = true;
while (running){
SDL_Event event;
if (SDL_PollEvent(&event)){
switch(event.type){
case SDL_QUIT:
running = false;
break;
};
}
timer.update();
Keyboard::update();
if (keyPressed(SDLK_ESCAPE))
running = false;
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(-scrWidth/2.0f, scrWidth/2.0f, scrHeight/2.0f, -scrHeight/2.0f);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glDisable(GL_DEPTH_TEST);
wchar_t buf[256];
swprintf(buf, 256, L"fps: %0.2f", timer.getFps());
glRasterPos2i(10-scrWidth/2, 20-scrHeight/2);
font.Render(buf);
glFlush();
SDL_GL_SwapBuffers();
}
SDL_Quit();
return 0;
}
Also, read the tutorial.
Judging by my source code, the version I'm using is 2.1.2 (since 2.1.3 is rc5 which is "release candidate", which is not "stable"). It looks like you're trying to use 2.1.3 - rc5. Downgrade to 2.1.2 and try again. Also, remember to tell what library version you're using next time you run into problem like this.
Alternatively you could try to fix FTGL (which is pain, and project seems to be abandoned). Or you could try to make your own freetype2-based font renderer (which is also pain, but might pay off in the long run).
EDIT 6
I've tried debugging from command line with gdb and it tells me that freetype6.dll can't be found.
I have placed freetype6.dll besides my executable file in the debug folder and it worked.
These are things that have slowed me or that I have learn while searching a solution:
Compiling with the same Compiler that I'm using
Learn to use code::block to import Visual Studio project
Actually be able to compile libraries in code::block without any warnings
Playing with linker flag (remove one and see what's going on) to help solve error and find problems
Learn to read provided example to find files that are necessary
And use gdb from command line
I got another problem while renaming some file of the project and I had to reconfigure my whole project in Eclipse (literally delete all files and checkout the SVN again). After that, the pure virtual error had disappeared! So I tried to debug the project and I got this error:
gdb: unknown target exception 0xc0000135 at 0x7724f52f
Eclipse wasn't helping me that much, so I tried the command line debugger and it told me that freetype6.dll was missing. And that was it!
I'm not sure why this is, but 99% of the problems I have with programming in C++ have to do with the gcc linker.
I want to link the Qt library to a project in CodeLite. This is the code I have so far:
#include <QApplication>
int main(int argc, char *argv[])
{
return 0;
}
When I compile, I get the error
/Users/andrew/Dev/C++/COSC 102/elitecod/main.cpp:1:24: error: QApplication: No such file or directory
I have Qt installed (with Homebrew, Mac OS X Lion) in /usr/local/include. Why is this happening, and how can I fix this problem?
The error indicates it can't find the file QApplication. You need to add the Qt 'include' directory to the list of places the compiler should look for it and other header files.
A brief google seems to indicate you may have other problems with Qt, you might want to keep this link handy.