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Re: SDL2

Subject: Re: SDL2
by kas1e on 2018/12/19 18:22:53

@Capehill
Quote:

Did you try glGetError()?

Yeah, in q3's code/sdl/sdl_glimp.c , we have there GLimp_EndFrame() function which has at top SDL_GL_SwapWindow(). So i made that:


const char* glGetErrorString(GLenum error)

{

    switch (error)

    {

    case GL_NO_ERROR:          return "No Error";

    case GL_INVALID_ENUM:      return "Invalid Enum";

    case GL_INVALID_VALUE:     return "Invalid Value";

    case GL_INVALID_OPERATION: return "Invalid Operation";

    case GL_INVALID_FRAMEBUFFER_OPERATION: return "Invalid Framebuffer Operation";

    case GL_OUT_OF_MEMORY:     return "Out of Memory";

    case GL_STACK_UNDERFLOW:   return "Stack Underflow";

    case GL_STACK_OVERFLOW:    return "Stack Overflow";

    default:                   return "Unknown Error";

    }

}



void _glCheckError(const char *filename, int line)

{

    GLenum err;

    while ((err = glGetError()) != GL_NO_ERROR)

        printf("OpenGL Error: %s (%d) [%u] %s\n", filename, line, err, glGetErrorString(err));

}





#define glCheckError() _glCheckError(__FILE__, __LINE__)

And put at top of function, and after SDL_GL_SwapWindow glCheckError():


void GLimp_EndFrame( void )

{

    glCheckError();

    // don't flip if drawing to front buffer

    if ( Q_stricmp( r_drawBuffer->string, "GL_FRONT" ) != 0 )

    {

        SDL_GL_SwapWindow( SDL_window );

    }

    glCheckError();



..blablabl

And it prinfs nothing, like no errors.. Tried both modes and when window fits in wb size, and when didn't, no errors in both cases , just in oversized one black window.