void Channel::_drawHelp()
{
const FrameData& frameData = _getFrameData();
std::string message = frameData.getMessage();
if( !frameData.showHelp() && message.empty( ))
return;
applyOverlayState();
const eq::PixelViewport& pvp = getPixelViewport();
const eq::Viewport& vp = getViewport();
const float height = pvp.h / vp.h;
if( !message.empty( ))
{
const eq::util::BitmapFont* font = getWindow()->getMediumFont();
const float width = pvp.w / vp.w;
const float xOffset = vp.x * width;
const float yOffset = vp.y * height;
const float yPos = 0.618f * height;
float y = yPos - yOffset;
for( size_t pos = message.find( '\n' ); pos != std::string::npos;
pos = message.find( '\n' ))
{
glRasterPos3f( 10.f - xOffset, y, 0.99f );
font->draw( message.substr( 0, pos ));
message = message.substr( pos + 1 );
y -= 22.f;
}
// last line
glRasterPos3f( 10.f - xOffset, y, 0.99f );
font->draw( message );
}
if( frameData.showHelp( ))
{
const eq::util::BitmapFont* font = getWindow()->getSmallFont();
std::string help = EqPly::getHelp();
float y = height - 16.f;
for( size_t pos = help.find( '\n' ); pos != std::string::npos;
pos = help.find( '\n' ))
{
glRasterPos3f( 10.f, y, 0.99f );
font->draw( help.substr( 0, pos ));
help = help.substr( pos + 1 );
y -= 16.f;
}
// last line
glRasterPos3f( 10.f, y, 0.99f );
font->draw( help );
}
resetOverlayState();
}
void Channel::_drawOverlay()
{
// Draw the overlay logo
const Window* window = static_cast<Window*>( getWindow( ));
const eq::util::Texture* texture = window->getLogoTexture();
if( !texture )
return;
applyOverlayState();
EQ_GL_CALL( glDisable( GL_COLOR_LOGIC_OP ));
EQ_GL_CALL( glPolygonMode( GL_FRONT_AND_BACK, GL_FILL ));
// logo
EQ_GL_CALL( glEnable( GL_BLEND ));
EQ_GL_CALL( glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ));
const GLenum target = texture->getTarget();
EQ_GL_CALL( glEnable( target ));
texture->bind();
EQ_GL_CALL( glTexParameteri( target, GL_TEXTURE_MAG_FILTER, GL_LINEAR ));
EQ_GL_CALL( glTexParameteri( target, GL_TEXTURE_MIN_FILTER, GL_LINEAR ));
const float tWidth = float( texture->getWidth( ));
const float tHeight = float( texture->getHeight( ));
const float width = target == GL_TEXTURE_2D ? 1.0f : tWidth;
const float height = target == GL_TEXTURE_2D ? 1.0f : tHeight;
glBegin( GL_QUADS );
{
glTexCoord2f( 0, 0 );
glVertex3f( 5.0f, 5.0f, 0.0f );
glTexCoord2f( width, 0 );
glVertex3f( tWidth + 5.0f, 5.0f, 0.0f );
glTexCoord2f( width, height );
glVertex3f( tWidth + 5.0f, tHeight + 5.0f, 0.0f );
glTexCoord2f( 0, height );
glVertex3f( 5.0f, tHeight + 5.0f, 0.0f );
}
glEnd();
EQ_GL_CALL( glDisable( target ));
EQ_GL_CALL( glDisable( GL_BLEND ));
resetOverlayState();
}
