Topics

1

Graphics / Problem with colours [SOLVED]

« on: November 23, 2009, 05:25:35 am »

After loading the image with the valuable help of Laurent (you'll get in the acknoledgements right now haha) I've noticed that the colours are not correct. But I think it's sfml responsability as when I output the file in TGA I see it correctly. This is an screenshot of the problem:



And here the code responsible for showing that:

Code: [Select]

void ICN::showFrame( RenderWindow *Window, unsigned short nFrame, unsigned short x, unsigned short y )
{
Image Frame; // Create image instance
ostringstream outputBuffer; // Output buffer to store decoded pixels

decodePixels( outputBuffer, nFrame ); // Fill buffer with the decoded pixels of the indicated frame of ICN group of images

if( !Frame.LoadFromPixels( getFrameWidth(nFrame), getFrameHeight(nFrame), (Uint8 *)outputBuffer.str().data() ) ) // Cargamos la imagen desde el búfer de pixeles
{
fprintf( stderr, "Couldn't load pixels!" );
exit( EXIT_FAILURE );
}

Sprite Sprite( Frame ); // Create drawable sprite from image
Sprite.SetPosition( x, y ); // Place sprite in position

Window->Draw( Sprite ); // Draw sprite in window
}

BUT, when I do this:

Code: [Select]

Uint8 *pointer = (Uint8 *)outputBuffer.str().data();
fwrite( pointer, outputBuffer.str().length(), 1, outputFile );

I get a perfect TGA image.

Any ideas? :roll:

2

Graphics / Doubt using Image::LoadFromMemory

« on: November 20, 2009, 05:50:54 am »

Good (and late) night! (sigh)

I'm using sfml to remake an old game. A feature that I liked from sfml is the ability to load images from pixels in memory.

The thing is that I have coded a tool that can convert the old game images (paletized, 8-bit, with some compression codes) to a raw tga file.

The problem is that I can't figure how to do that in memory! As I can't use write statements to output things to RAM don't know how to "convert" this algorithm of many cases and a bit of complexity so that it operates without the need of creating a temporary output file.

I know that I just could create that temporary file and use LoadFromFile but it would be much neater if I could do that operations on memmory.

A small portion of the algorithm, as an example:

Code: [Select]

fread( &n, sizeof(n), 1, fichero );
switch( n )
{
case 0: // End of line, fill the rest of widht as translucid
if( (pixelesEscritos % encabezadoTGA.width) != 0 )
{
pixelesRestantes = encabezadoTGA.width - pixelesEscritos % encabezadoTGA.width;
for( int i = 0; i < pixelesRestantes; i++ )
fwrite( &transparente, sizeof(transparente), 1, output );
pixelesEscritos += pixelesRestantes;
}
break;
case 128: // End of image, fill as translucid the widht*height
if( pixelesEscritos < encabezadoTGA.width * encabezadoTGA.height )
{
for( int i = 0; i < (pixelesEscritos - (encabezadoTGA.width * encabezadoTGA.height)); i++ )
{
fwrite( &transparente, sizeof(transparente), 1, output );
pixelesEscritos++;
}
}
seguir = false;
break;


There are other two special cases(n=192, n=193) and three default cases (n>0, n>128, n>193).

The thing is how to make all that without the needing of an output file, if possible. I know this is more a technique/pro. language related question than sfml topic, but I think exploiting this sfml feature will come very handy.

3

General / Strange error linking statically

« on: October 22, 2009, 03:00:09 am »

I followed the tutorial and I got to compile the basic window program with Visual Studio Express 2008 (dynamically).

When I change the Additional Dependencys from sfml-main.lib sfml-window.lib sfml-system.lib to sfml-main.lib sfml-windows-s.lib sfml-system-s.lib I get the following compilation errors:

Error   1   error LNK2001: símbolo externo __imp___invalid_parameter_noinfo sin resolver   sfml-window-s.lib
Error   2   error LNK2019: símbolo externo __imp___invalid_parameter_noinfo sin resolver al que se hace referencia en la función "public: bool __thiscall sf::Window::GetEvent(class sf::Event &)" (?GetEvent@Window@sf@@QAE_NAAVEvent@2@@Z)   sfml-window-s.lib
Error   3   error LNK2001: símbolo externo __imp___invalid_parameter_noinfo sin resolver   sfml-window-s.lib
Error   4   error LNK2001: símbolo externo __imp___invalid_parameter_noinfo sin resolver   sfml-window-s.lib
Error   5   error LNK2001: símbolo externo __imp___invalid_parameter_noinfo sin resolver   sfml-window-s.lib
Error   6   fatal error LNK1120: 1 externos sin resolver   C:\Documents and Settings\José Antonio\Mis documentos\Visual Studio 2008\Projects\sfmlWindow\Debug\sfmlWindow.exe   1

I tried many things but still no idea why static compilation is failing!

Can anyone help?  :roll:  Just came from SDL and have no idea!