IMG_GetError() : Unsupported image format

rahulvishwakarma · 10-18-2019, 07:08 AM

hi to all, UI've centos 7.5 in VM for SDL2 programming. while this error is in "IMG_Load(filepath.c_str());" error is following

Code:

[rahul@centos75client Release]$ ./diffrent\ iamge\ formats 
 file path = /opt/projects/codeblocks/sdl/diffrent iamge formats/1.bmp window surface = 0
Error in   windowSurface == nullptr  : Unsupported image format

mine cpp file is :-

Code:

#include <SDL.h>
#include <SDL/SDL_image.h>

#include <iostream>
#include <string>

using std::cin;
using std::cout;
using std::endl;

SDL_Texture *OptimizeTexture(std::string filepath, SDL_Renderer *windowRenderer)
{
    SDL_Texture * texture = nullptr;

    SDL_Surface * windowSurface = IMG_Load(filepath.c_str());
    cout << " file path = " << filepath.c_str() << " window surface = "<< windowSurface<<endl;

    if( windowSurface == nullptr)
    {
        cout << "Error in   windowSurface == nullptr  : " << IMG_GetError() << endl;
        exit(4);
    }

    texture = SDL_CreateTextureFromSurface(windowRenderer,windowSurface);

    if(texture == nullptr)
    {
        cout << " Error : in SDL_CreateTextureFromSurface(windowRenderer,windowSurface); ... "  << SDL_GetError() << endl;
        exit(5);
    }

    return texture;

}



int main(int argc, char ** argv)
{

    SDL_Surface * currentImage = nullptr;
    SDL_Renderer *renderer = nullptr;
    SDL_Window * sdlWindow = nullptr;
    SDL_Surface *windowsurface = SDL_GetWindowSurface(sdlWindow);

    if(SDL_Init(SDL_INIT_EVERYTHING) < 0)
    {
        std ::cout <<"Error in ...  if(SDL_Init(SDL_INIT_EVERYTHING) <0) : " << SDL_GetError() << endl;
    }

    if((sdlWindow = SDL_CreateWindow("Game engine", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,1024, 768, SDL_WINDOW_SHOWN | SDL_WINDOW_OPENGL)) < 0)
    {
        std ::cout <<"Error in ... sdlWindow = SDL_CreateWindow : "<<  SDL_GetError() << endl;
        exit(2);
    }

    int imgFlags = IMG_INIT_JPG | IMG_INIT_PNG;

    if(!((IMG_Init(imgFlags)) & imgFlags))
    {
        cout << "Error in ... if(!(IMG_Init(imgFlags)&imgFlags)) : " << IMG_GetError() << endl;
        exit(3);
    }
   
    renderer = SDL_CreateRenderer(sdlWindow,-1, SDL_RENDERER_ACCELERATED);

   	currentImagetexture = OptimizeTexture("/opt/projects/codeblocks/sdl/diffrent image formats/1.bmp", renderer);



    SDL_Event *ev = new SDL_Event;

    bool isRunning = true;

    while(isRunning)
    {
        while (SDL_PollEvent(ev))
        {
            if(ev->type == SDL_QUIT)
            {
                isRunning = false;
            }

        }
        SDL_RenderClear(renderer);
        SDL_RenderCopy(renderer, currentImagetexture, NULL, NULL);
        SDL_RenderPresent(renderer);
    }

    SDL_FreeSurface(windowsurface);
    windowsurface = nullptr;
    currentImage = nullptr;

    SDL_DestroyWindow(sdlWindow);
	sdlWindow = nullptr;
    SDL_Quit();

    return 0;
}

TB0ne · 10-18-2019, 07:21 AM

Quote:

Originally Posted by rahulvishwakarma

hi to all, UI've centos 7.5 in VM for SDL2 programming. while this error is in "IMG_Load(filepath.c_str());" error is following

Code:

[rahul@centos75client Release]$ ./diffrent\ iamge\ formats 
 file path = /opt/projects/codeblocks/sdl/diffrent iamge formats/1.bmp window surface = 0
Error in   windowSurface == nullptr  : Unsupported image format

mine cpp file is :-

Code:

#include <SDL.h>
#include <SDL/SDL_image.h>

#include <iostream>
#include <string>

using std::cin;
using std::cout;
using std::endl;

SDL_Texture *OptimizeTexture(std::string filepath, SDL_Renderer *windowRenderer)
{
    SDL_Texture * texture = nullptr;

    SDL_Surface * windowSurface = IMG_Load(filepath.c_str());
    cout << " file path = " << filepath.c_str() << " window surface = "<< windowSurface<<endl;

    if( windowSurface == nullptr)
    {
        cout << "Error in   windowSurface == nullptr  : " << IMG_GetError() << endl;
        exit(4);
    }

    texture = SDL_CreateTextureFromSurface(windowRenderer,windowSurface);

    if(texture == nullptr)
    {
        cout << " Error : in SDL_CreateTextureFromSurface(windowRenderer,windowSurface); ... "  << SDL_GetError() << endl;
        exit(5);
    }

    return texture;

}



int main(int argc, char ** argv)
{

    SDL_Surface * currentImage = nullptr;
    SDL_Renderer *renderer = nullptr;
    SDL_Window * sdlWindow = nullptr;
    SDL_Surface *windowsurface = SDL_GetWindowSurface(sdlWindow);

    if(SDL_Init(SDL_INIT_EVERYTHING) < 0)
    {
        std ::cout <<"Error in ...  if(SDL_Init(SDL_INIT_EVERYTHING) <0) : " << SDL_GetError() << endl;
    }

    if((sdlWindow = SDL_CreateWindow("Game engine", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,1024, 768, SDL_WINDOW_SHOWN | SDL_WINDOW_OPENGL)) < 0)
    {
        std ::cout <<"Error in ... sdlWindow = SDL_CreateWindow : "<<  SDL_GetError() << endl;
        exit(2);
    }

    int imgFlags = IMG_INIT_JPG | IMG_INIT_PNG;

    if(!((IMG_Init(imgFlags)) & imgFlags))
    {
        cout << "Error in ... if(!(IMG_Init(imgFlags)&imgFlags)) : " << IMG_GetError() << endl;
        exit(3);
    }
   
    renderer = SDL_CreateRenderer(sdlWindow,-1, SDL_RENDERER_ACCELERATED);

   	currentImagetexture = OptimizeTexture("/opt/projects/codeblocks/sdl/diffrent image formats/1.bmp", renderer);



    SDL_Event *ev = new SDL_Event;

    bool isRunning = true;

    while(isRunning)
    {
        while (SDL_PollEvent(ev))
        {
            if(ev->type == SDL_QUIT)
            {
                isRunning = false;
            }

        }
        SDL_RenderClear(renderer);
        SDL_RenderCopy(renderer, currentImagetexture, NULL, NULL);
        SDL_RenderPresent(renderer);
    }

    SDL_FreeSurface(windowsurface);
    windowsurface = nullptr;
    currentImage = nullptr;

    SDL_DestroyWindow(sdlWindow);
	sdlWindow = nullptr;
    SDL_Quit();

    return 0;
}

Ok...it's telling you clearly that it can't read that file. Use a different image format for what you're trying to do, or change the name to something without spaces and try it. You've been asking about C++ programming for NINE YEARS now; after all that time you should know the basics of debugging your code.

::EDIT:: Did you read the documentation?
http://wiki.libsdl.org/SDL_CreateTexture

rahulvishwakarma · 10-18-2019, 07:49 AM

I've tried for passing images as jpg, bmp, png but all have same errors. what should i do

TB0ne · 10-18-2019, 08:31 AM

Quote:

Originally Posted by rahulvishwakarma

I've tried for passing images as jpg, bmp, png but all have same errors. what should i do

You should re-read the previous reply. Again, you were told to remove the spaces from the file name/path...did you? Did you read the documentation on how to do what you're after, because it appears as if your syntax is wrong.

Again: you've been coding for NINE YEARS; you should know how to debug your own code and read API documentation at this point.

rahulvishwakarma · 10-18-2019, 09:04 PM

hi to all, I've centos7.5 in VM. I am trying to compile to SDL2 program. but having following problem :-

Code:

/usr/local/lib/libSDL2_ttf.so||undefined reference to `SDL_RWseek'|
/usr/local/lib/libSDL2_ttf.so||undefined reference to `SDL_RWclose'|
/usr/local/lib/libSDL2_ttf.so||undefined reference to `SDL_RWtell'|
/usr/local/lib/libSDL2_ttf.so||undefined reference to `SDL_RWsize'|
/usr/local/lib/libSDL2_ttf.so||undefined reference to `SDL_RWread'|
||error: ld returned 1 exit status|

mine source code is :-

Code:

#include <SDL.h>
#include <SDL/SDL_image.h>
#include <SDL_ttf.h>

#include <iostream>
#include <string>

using std::cin;
using std::cout;
using std::endl;


int main(int argc, char ** argv)
{

    SDL_Texture *currentImagetexture = nullptr;
    SDL_Surface * currentImage = nullptr;
    SDL_Renderer *renderer = nullptr;
    SDL_Window * sdlWindow = nullptr;
    SDL_Surface *windowsurface = SDL_GetWindowSurface(sdlWindow);

    if(SDL_Init(SDL_INIT_EVERYTHING) < 0)
    {
        std ::cout <<"Error in ...  if(SDL_Init(SDL_INIT_EVERYTHING) <0) : " << SDL_GetError() << endl;
    }

    if((sdlWindow = SDL_CreateWindow("Game engine", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,1024, 768, SDL_WINDOW_SHOWN | SDL_WINDOW_OPENGL)) < 0)
    {
        std ::cout <<"Error in ... sdlWindow = SDL_CreateWindow : "<<  SDL_GetError() << endl;
        exit(2);
    }

    if(TTF_Init() < 0 )
    {
        cout << " Error ... TTF_Init() < 0 ) " << TTF_GetError() << endl;
        exit(4);
    }

    windowsurface = SDL_GetWindowSurface(sdlWindow);

    renderer = SDL_CreateRenderer(sdlWindow,-1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);

    SDL_Event *ev = new SDL_Event;

    TTF_Font *font = TTF_OpenFont("Roboto-Black.ttf",20);
    SDL_Color color = {0,0,0,255};
    SDL_Surface *text_surface = TTF_RenderText_Solid(font, "rahul", color);
    SDL_Texture * text = SDL_CreateTextureFromSurface(renderer, windowsurface);

    SDL_Rect rect;
    rect.x = rect.y =0;

    SDL_QueryTexture(text, NULL, NULL,&rect.w, &rect.h);

    bool isRunning = true;

    while(isRunning)
    {
        while (SDL_PollEvent(ev))
        {
            if(ev->type == SDL_QUIT)
            {
                isRunning = false;
            }

        }
        SDL_RenderClear(renderer);
        SDL_RenderCopy(renderer, text, NULL, &rect);
        SDL_RenderPresent(renderer);
    }


    SDL_FreeSurface(windowsurface);
    SDL_FreeSurface(currentImage);

    SDL_DestroyRenderer(renderer);

    SDL_DestroyTexture(currentImagetexture);
    SDL_DestroyWindow(sdlWindow);

    windowsurface = nullptr;
    currentImage = nullptr;
	sdlWindow = nullptr;
    SDL_Quit();

    return 0;
}

how to remove those errors

astrogeek · 10-18-2019, 11:55 PM

The error indicates that you have either not told it to link the SDL libs, or have not installed the needed SDL package.

My knowledge is not current with SDL, but a quick search for the errors turns up many hits including this one which appears to be related.

In the case of linker errors, having the source code is often not particularly helpful to others trying to understand the problem. It would be more helpful if you could show the complete compiler command which produces the errors.

Please review the Site FAQ for guidance in posting your questions and general forum usage. Especially, read the link in that page, How To Ask Questions The Smart Way. The more effort you put into understanding your problem and framing your questions, the better others can help!

This thread is a continuation of your previous question about the same code. As neither thread actually asks a specific question which would distinguish them as separate issues they are being merged as duplicates.