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Linux problems
MrTAToad


Joined: 13 Feb 2014
Posts: 205
Location: Chichester, England
Post Posted: Fri Aug 15, 2014 9:37 pm
I'm having some odd problems with SDL2.0.2 on Ubuntu Linux - Line drawing works okay, but drawing a rectangle doesn't - nothing is display no matter what colour is used.

In addition, SDL_ttf isn't working properly either - a surface is being created but again, nothing is being displayed.

My rectangle routine is thus :

Code:

SDL_Rect rect;





    rect.x=sx;

    rect.y=sy;

    rect.w=ex;

    rect.h=ey;



//    SDL_SetRenderDrawBlendMode(m_mainRenderer,blendModes[DRAW-TEXTURE].mode);

    //SDL_SetRenderDrawColor(m_mainRenderer,RGBR(col),RGBG(col),RGBB(col),SDL_ALPHA_OPAQUE);

    if (SDL_RenderFillRect(m_mainRenderer,(SDL_Rect *) &rect)!=0)
    {
        DEBUG("Error!");

    }


No error is being reported with RenderFillRect and the main renderer has been set up.

It all works fine in Windows!
Linux problems
MrOzBarry


Joined: 26 Jun 2010
Posts: 620
Post Posted: Fri Aug 15, 2014 9:51 pm
Can you post your complete test code that reproduces the issue?


On Fri, Aug 15, 2014 at 5:37 PM, MrTAToad wrote:
Quote:
I'm having some odd problems with SDL2.0.2 on Ubuntu Linux - Line drawing works okay, but drawing a rectangle doesn't - nothing is display no matter what colour is used.

In addition, SDL_ttf isn't working properly either - a surface is being created but again, nothing is being displayed.

My rectangle routine is thus :




Code:


SDL_Rect rect;





    rect.x=sx;

    rect.y=sy;

    rect.w=ex;

    rect.h=ey;



//    SDL_SetRenderDrawBlendMode(m_mainRenderer,blendModes[DRAW-TEXTURE].mode);

    //SDL_SetRenderDrawColor(m_mainRenderer,RGBR(col),RGBG(col),RGBB(col),SDL_ALPHA_OPAQUE);

    if (SDL_RenderFillRect(m_mainRenderer,(SDL_Rect *) &rect)!=0)
    {
        DEBUG("Error!");

    }





No error is being reported with RenderFillRect and the main renderer has been set up.

It all works fine in Windows!


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MrTAToad


Joined: 13 Feb 2014
Posts: 205
Location: Chichester, England
Post Posted: Fri Aug 15, 2014 10:52 pm
My test code is :

Code:
#include <Triority.h>

int main(int argc,char *argv[])
{
    if (__GLB_Defaults(argc,argv,"linux","test")==false)
    {
        END();
        return false;
    }

    //SETSCREEN(640,480,false);
    //SETFONT(0);
    FONTCOLOUR(0);
    CLEARSCREEN(0);
    while (true)
    {
        //ALPHAMODE(-1.0);
        DRAWRECT(0,0,100,100,GLRGB(255,0,0));
        DRAWLINE(0,0,300,300,GLRGB(0,0,255));

        ALPHAMODE(0);
        if (PRINT("Test",100,100)==false)
        {
            DEBUG("Error : "+GETLASTERROR_Str()+"\n");
        }

        SHOWSCREEN();

    }
    return true;
}
Linux problems
MrOzBarry


Joined: 26 Jun 2010
Posts: 620
Post Posted: Fri Aug 15, 2014 10:55 pm
For the sake of sanity, you'll also have to include definitions for DRAWRECT, DRAWLINE, ALPHAMODE, and SHOWSCREEN, as well as your SDL init code (I presume that's inside  __GLB_defaults() ?), since it would be most helpful for debugging the code that's directly using SDL.


On Fri, Aug 15, 2014 at 6:52 PM, MrTAToad wrote:
Quote:
My test code is :




Code:

#include

int main(int argc,char *argv[])
{
    if (__GLB_Defaults(argc,argv,"linux","test")==false)
    {
        END();
        return false;
    }

    //SETSCREEN(640,480,false);
    //SETFONT(0);
    FONTCOLOUR(0);
    CLEARSCREEN(0);
    while (true)
    {
        //ALPHAMODE(-1.0);
        DRAWRECT(0,0,100,100,GLRGB(255,0,0));
        DRAWLINE(0,0,300,300,GLRGB(0,0,255));

        ALPHAMODE(0);
        if (PRINT("Test",100,100)==false)
        {
            DEBUG("Error : "+GETLASTERROR_Str()+"\n");
        }

        SHOWSCREEN();

    }
    return true;
}





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MrTAToad


Joined: 13 Feb 2014
Posts: 205
Location: Chichester, England
Post Posted: Fri Aug 15, 2014 10:55 pm
My Triority system can be downloaded from : https://onedrive.live.com/redir?resid=C74F6DC48C7A65C9%211049
MrTAToad


Joined: 13 Feb 2014
Posts: 205
Location: Chichester, England
Post Posted: Sat Aug 16, 2014 10:23 am
__glb_init :

Code:
DGNat    __GLB_Defaults(int argc, char * argv[],const char *organisation,const char *programName)
{
int imgFlags    =   IMG_INIT_JPG | IMG_INIT_PNG | IMG_INIT_TIF;
DGStr progName;

    SDL_ClearError();

    try
    {
        if (m_window==NULL)
        {
         DGNat defaultFontIndex = 0;

         if (SDL_Init(SDL_INIT_EVERYTHING)!=0)               throw(CMP_SDL_ERROR);
            if ((IMG_Init(imgFlags) & imgFlags)!=imgFlags)      throw(CMP_SDL_IMG_ERROR);
            if (TTF_Init()!=0)                                  throw(CMP_SDL_TTF_ERROR);
            if (SDLNet_Init()!=0)                               throw(CMP_SDL_NET_ERROR);
            if (Mix_OpenAudio(22050,AUDIO_S16SYS,2,4096)!=0)    throw(CMP_SDL_MIXER_ERROR);

         DEBUG("Credits : \n");
         DEBUG("Default font created by Paul D. Hunt\n");
         DEBUG("Converted to C array by Nicholas Kingslery using GLBasic\n");
         DEBUG("Sprite collision detection based on Separating Axis Theorem - original code at http://ragestorm.net/samples/CDRR.C\n");

         SDL_zero(viewportRect);

            blendModes=new (std::nothrow) struct __blend[MAX_BLEND];
            proFontSprites=new (std::nothrow) DGNat[MAX_PROSPRITES];
            borderColour=new (std::nothrow) DGNat[MAX_BORDERCOLOURS];
            if (blendModes==NULL || proFontSprites==NULL || borderColour==NULL) throw(CMP_OUT_OF_MEMORY);

            m_background=new (std::nothrow) struct __sprite;
            if (m_background==NULL)                                             throw(CMP_OUT_OF_MEMORY);
            m_background->texture=NULL;

            setlocale(LC_ALL, "");
            isMinimised=false; // Needs to be current window setting
         inKeyChar = "";
         editChar = "";

            DIM(sprites,0);
            DIM(fonts,0);
            DIM(screens,0);
            DIM(files,0);
            DIM(sounds,0);
            DIM(ini,0);
            DIM(modules,0);
            DIM(proFonts,0);
            DIM(particles,0);
            DIM(freeParticles,600);
            DIM(liveParticles,0);

            // Clear the pro font sprite list
         for (int loop = 0; loop<MAX_PROSPRITES; loop++)   proFontSprites[loop] = INVALID_HANDLE;

            ALLOWESCAPE(ALLOW_ESCAPE | ALLOW_CLOSE | ALLOW_ALTRETURN);

            SETTITLE(progName.c_str());

            SETSCREEN(640,480,false);
            SETBORDERCOLOUR(0,GLRGB(255,255,255));
            SETBORDERSIZE(0);
            SETBORDERTYPE(SINGLE);
            LIMITFPS(75.0,false);
            SEEDRND((DGNat) GETTIMERALL());

         BLENDMODE(SDL_BLENDMODE_BLEND);
         ALPHALEVEL(255);
         COLOURLEVEL(GLRGB(255, 255, 255));

         SETTRANSPARENCY(0);
            CLEARSCREEN(GLRGB(0,0,0));
            AUTOPAUSE(true);

         FONTCOLOUR(GLRGB(255, 255, 255));
            SPRITEHANDLE(TOPLEFT,TOPLEFT);

            //LOADBMP(DGStr(""));
         if (LOADFONT(defaultFont, defaultFont_FILESIZE, defaultFontIndex, 16) == false)
         {
            DEBUG("* Warning!  Unable to create font from default data.  No text will currently be displayed.\n");
         }

         SETFONT(defaultFontIndex);

            SETPROFONT(0);
            SETPROFONTCHARSPACING(0);
            SETPROFONTLINESPACING(0);

            //glEnable( GL_TEXTURE_2D ); // Need this to display a texture

            numberOfDesktops=SDL_GetNumVideoDisplays();
            __numJoysticks=SDL_NumJoysticks();

            DIM(joysticks,__numJoysticks);
            for (int loop=0; loop<__numJoysticks; loop++)
            {
                joysticks(loop)=SDL_JoystickOpen(loop);
            }

            progName=(programName==NULL ? "Test" : programName);
            basePath=SDL_GetBasePath();
            prefPath=SDL_GetPrefPath((organisation==NULL ? "GLBasic" : organisation),
                                     progName.c_str());

            if (prefPath)
            {
                CREATEDIR(prefPath);
            }


            // Process the command line arguments
            commandLine="";
            for (int loop=0; loop<argc; loop++)
            {
                if (loop==0)
                {
                    commandLine+=DGStr("\"")+argv[loop]+DGStr("\"");
                }
                else
                {
                    commandLine+=argv[loop];
                }

                if (loop<argc-1) commandLine+=" ";
            }

            // Setup frame time
            lastTicks=0;
            frameTime=0;
        }

        return true;
    }
    catch (const DGNat& error)
    {
      if (blendModes)
      {
         delete[] blendModes;
         blendModes = NULL;
      }

      if (proFontSprites)
      {
         delete[] proFontSprites;
         proFontSprites = NULL;
      }

      if (borderColour)
      {
         delete[] borderColour;
         borderColour = NULL;
      }

      if (m_background)
      {
         delete m_background;
         m_background = NULL;
      }

        __Error(error);
        return false;
    }
}


Drawline :
Code:
void    __GLBASIC__::DRAWLINE(DGNat sx, DGNat sy, DGNat ex, DGNat ey, DGNat col)
{
    SDL_SetRenderDrawBlendMode(m_mainRenderer,blendModes[DRAW-TEXTURE].mode);
    SDL_SetRenderDrawColor(m_mainRenderer,RGBR(col),RGBG(col),RGBB(col),SDL_ALPHA_OPAQUE);
    SDL_RenderDrawLine(m_mainRenderer,sx,sy,ex,ey);
}


Showscreen :

Code:
void    __GLBASIC__::SHOWSCREEN()
{
    SDL_RenderPresent(m_mainRenderer);
    X_MAKE2D();

   ALPHAMODE(0); // Change later!
   VIEWPORT(0, 0, -1, -1);

   ProcessEvents(false);
}


Alphamode :

Code:
void    __GLBASIC__::ALPHAMODE(DGInt amount)
{
    amount=CONSTRAIN(amount,-1.0,3.0);
    if (amount<0.0)
    {
      BLENDMODE(SDL_BLENDMODE_BLEND); ALPHALEVEL((DGNat) ABS(amount*255.0));
    }
   else if (amount > 0.0)
   {
      if (amount >= 2.0)
      {
         BLENDMODE(SDL_BLENDMODE_MOD); ALPHALEVEL((DGNat)ABS((amount - 2.0)*255.0));
      }
      else
      {
         BLENDMODE(SDL_BLENDMODE_ADD); ALPHALEVEL((DGNat)ABS(amount*255.0));
      }
   }
   else
   {
      BLENDMODE(SDL_BLENDMODE_NONE); ALPHALEVEL(255);
   }
}
MrTAToad


Joined: 13 Feb 2014
Posts: 205
Location: Chichester, England
Post Posted: Sat Aug 16, 2014 1:10 pm
I also have the same problem with the slightly amended code from the SDL wiki :

Code:
#include "SDL.h"

int main(int argc, char *argv[]) {
    SDL_Window *win = NULL;
    SDL_Renderer *renderer = NULL;
    SDL_Texture *bitmapTex = NULL;
    SDL_Surface *bitmapSurface = NULL;
    int posX = 100, posY = 100, width = 320, height = 240;
    SDL_Rect rect;

    win = SDL_CreateWindow("Hello World", posX, posY, width, height, 0);

    renderer = SDL_CreateRenderer(win, -1, SDL_RENDERER_ACCELERATED);

    bitmapSurface = SDL_LoadBMP("img/hello.bmp");
    bitmapTex = SDL_CreateTextureFromSurface(renderer, bitmapSurface);
    SDL_FreeSurface(bitmapSurface);

    while (1) {
        SDL_Event e;
        if (SDL_PollEvent(&e)) {
            if (e.type == SDL_QUIT) {
                break;
            }
        }

        rect.x=10;
        rect.y=10;
        rect.w=50;
        rect.h=50;

        SDL_SetRenderDrawColor(renderer,255,0,255,255);
        SDL_RenderClear(renderer);
        SDL_RenderCopy(renderer, bitmapTex, NULL, NULL);
        SDL_SetRenderDrawColor(renderer,255,0,0,255);
        SDL_RenderFillRect(renderer,&rect);
        SDL_RenderPresent(renderer);
    }


However, changing to a non-filled rectangle and all is okay...
MrTAToad


Joined: 13 Feb 2014
Posts: 205
Location: Chichester, England
Post Posted: Sat Aug 16, 2014 1:57 pm
Think I've solved the problem!

Despite protestations to the contrary, it appears that VMPlayer drivers aren't hardware accelerated, hence the cause of the problem. Changing to a software driver solves the problem...
MrTAToad


Joined: 13 Feb 2014
Posts: 205
Location: Chichester, England
Post Posted: Sat Aug 16, 2014 4:51 pm
It looks like TextureBlendMode isn't available for software rendering...