TextureLoader::TextureLoader() {
// load in the Quake 2 colour palette
// WAL textures do not contain definitive colours in RGB format.
// Instead, they contain indices into this colour palette, which in turn
// has the colours in RGB format.
LoadFilePCX( "Q2/pics/colormap.pcx", &palette, NULL, NULL, false );
megaTexture = NULL;
};
unsigned int CTextureManager::LoadTexture( const char *filename )
{
unsigned int id = 0;
unsigned char *texels = 0;
int width, height;
int success;
for( TListItor itor = m_texlist.begin(); itor != m_texlist.end(); ++itor )
{
if( strcmp( (*itor)->GetName(), filename ) == 0 )
return (*itor)->GetTexId();
}
if( strstr( filename, ".bmp" ) || strstr( filename, ".BMP" ) )
success = LoadFileBMP( filename, &texels, &width, &height, true );
if( strstr( filename, ".tga" ) || strstr( filename, ".TGA" ) )
success = LoadFileTGA( filename, &texels, &width, &height, true );
if( strstr( filename, ".pcx" ) || strstr( filename, ".PCX" ) )
success = LoadFilePCX( filename, &texels, &width, &height, true );
if( success > 0 )
{
// create and initialize new texture
glGenTextures( 1, &id );
glBindTexture( GL_TEXTURE_2D, id );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
gluBuild2DMipmaps( GL_TEXTURE_2D, GL_RGBA, width, height, GL_RGBA, GL_UNSIGNED_BYTE, texels );
// create a new CTexture object and push it at the end of the linked list
CTexture *tex = new CTexture( id, filename );
m_texlist.push_back( tex );
}
else
{
// can't load the texture, use default texture
id = (*m_texlist.begin())->GetTexId();
}
if( texels )
delete [] texels;
return id;
}
/*
***************************************************************
*
* Takes in a filename that is either a bmp file or a PCX file
* and uses the correct loader for the particular filetype.
*
***************************************************************
*/
GLuint TextureManager::loadTextureFromFile(const QString& fileName)
{
GLuint texture;
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_LINEAR); // Linear Filtering
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR); // Linear Filtering
glTexParameteri (GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);
glHint (GL_GENERATE_MIPMAP_HINT_SGIS, GL_NICEST);
int loadSuccessful = 0;
if(fileName.contains(QString("bmp"), Qt::CaseInsensitive))
{
loadSuccessful = bmpImageReader_.Load(fileName.toAscii().data());
if(loadSuccessful == IMG_OK)
{
gluBuild2DMipmaps(GL_TEXTURE_2D, 3, bmpImageReader_.GetWidth(), bmpImageReader_.GetHeight()
, GL_BGR, GL_UNSIGNED_BYTE, bmpImageReader_.GetImg() );
}
}
else if(fileName.contains(QString("pcx"), Qt::CaseInsensitive))
{
unsigned char* pixels = NULL;
pixels = new unsigned char[1];
int width = 0;
int height = 0;
bool flip = true;
loadSuccessful = LoadFilePCX(fileName.toAscii().data(),
&pixels, &width, &height, flip);
if(1 == loadSuccessful)
{
gluBuild2DMipmaps(GL_TEXTURE_2D, 3, width, height, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
}
}
return texture;
}
