Problems Drawing Images

[danlorimer]

I have switched to Code:Blocks and everything has been going great. However, when I use the IMG_Load function my program goes schitzo!!

For example: When I use a .png....
CODE

img_temp = IMG_Load("Data/test.png");
if(img_temp == NULL)
{
printf("LoadTexture : %s\n", SDL_GetError());
}


....my debug string says:
QUOTE

LoadTexture : Unsupported texture format



If I use a .bmp, it just doesn't draw anything.


I have used the installer from yauster, and borrowed code from GuyFawkes sdltest but is still fcuked.

Any ideas, folks?

 

[juanvvc]

The SDL core only supports BMP. You'll need link to libpng and libz to support PNGs. http://www.libsdl.org/cgi/docwiki.cgi/SDL_5fimage

 

[danlorimer]

I am using SDL_image, which apparently supports most 'standard' image formats (BMP, JPG, PNG, etc)

 

[Sphinxter]

I too had to add png support and rebuild SDL_image.

 

[senquack]

Might try downloading the Open2X library package from here and extracting it somewhere. Copy all the libSDL*.a files out of it and into your current lib directory (making a backup of it first would be prudent). Since the versions might be different, you should also copy the corresponding *.h include files over too.

I guess it might be a bug in Yaustar's package.. that is mighty unusual that you can't load PNGs of all things. I can't think of why it would say unsupported texture unless the library was accidentally compiled without PNG support.

 

[PokeParadox]

This may sound silly, but I have had a similar problem all because the filename had a capitalised extension (i.e. *.PNG instead of *.png)

I was calling the name correctly, but it just couldn't see it as a png until renaming the extension.

 

[danlorimer]

The thing I even took the sdltest code to see if it was just my code, and that fails to work also (but it works in it's own project which I have blatantly copied from)

 

[yaustar]

Have you statically linked all the libraries for the GP2X project? Don't forget that the GP2X is case sensitive on filenames as well.

 

[danlorimer]

I just copied and pasted the linker statements from the GuyFawkes sdltest that you included with your Code::Blocks installer. I take it that they support png's as the test has one.....(?)

 

[yaustar]

This is going to sound dumb but are you sure the png is actually a png?

 

[danlorimer]

Ok, I have given up on png's for now, bitmaps will have to do....
My windows exe is showing me the bmp images like I ask, but my gp2x app just shows me a lovely pink screen (I fill bg as pink so I know that it working).
I have linked all the librarys linked and am just plain confused now


P.S. Yaustar - yes, my pngs were pngs made in photoshop. Just plain non interlaced bg's with "This is a test" written on them.

 

[Phaxan]

Any problem with your SDL_SetVideoMode flags ? Do you use HWSurface or SWSurface ? Using a SDL_Flip() to refresh the display ?

I remember having trouble trying to use the HWSurface flag for the GP2X, the DOUBLEBUFFER flag didn't work either, so I use SWSurface and still SDL_flip to refresh ( even if DOUBLEBUFFER is not set, the SDL doc says you can use this function in Software rendering ).

GP2X linux is case sensitive ( like any linux ), be sure to have the good ressource name, try numbers to name the image.

I failed compiling the SDL_test too, I suppose that example needs the non official toolchain and a static compilation. I use the GPH DevC++/SDL package and can't make static versions of my apps that work on the GP2X, so I stick at dynamic compilation.