Texture::Texture( const Channel8u &channel, Format format )
: mObj( shared_ptr<Obj>( new Obj( channel.getWidth(), channel.getHeight() ) ) )
{
if( format.mInternalFormat < 0 )
format.mInternalFormat = GL_LUMINANCE;
mObj->mInternalFormat = format.mInternalFormat;
mObj->mTarget = format.mTarget;
// if the data is not already contiguous, we'll need to create a block of memory that is
if( ( channel.getIncrement() != 1 ) || ( channel.getRowBytes() != channel.getWidth() * sizeof(uint8_t) ) ) {
shared_ptr<uint8_t> data( new uint8_t[channel.getWidth() * channel.getHeight()], checked_array_deleter<uint8_t>() );
uint8_t *dest = data.get();
const int8_t inc = channel.getIncrement();
const int32_t width = channel.getWidth();
for( int y = 0; y < channel.getHeight(); ++y ) {
const uint8_t *src = channel.getData( 0, y );
for( int x = 0; x < width; ++x ) {
*dest++ = *src;
src += inc;
}
}
init( data.get(), channel.getRowBytes() / channel.getIncrement(), GL_LUMINANCE, GL_UNSIGNED_BYTE, format );
}
else
init( channel.getData(), channel.getRowBytes() / channel.getIncrement(), GL_LUMINANCE, GL_UNSIGNED_BYTE, format );
}
Surface8u colorizeBodyIndex( const Channel8u& bodyIndexChannel )
{
Surface8u surface;
if ( bodyIndexChannel ) {
surface = Surface8u( bodyIndexChannel.getWidth(), bodyIndexChannel.getHeight(), true, SurfaceChannelOrder::RGBA );
Channel8u::ConstIter iterChannel = bodyIndexChannel.getIter();
Surface8u::Iter iterSurface = surface.getIter();
while ( iterChannel.line() && iterSurface.line() ) {
while ( iterChannel.pixel() && iterSurface.pixel() ) {
size_t index = (size_t)iterChannel.v();
ColorA8u color( getBodyColor( index ), 0xFF );
if ( index == 0 || index > BODY_COUNT ) {
color.a = 0x00;
}
iterSurface.r() = color.r;
iterSurface.g() = color.g;
iterSurface.b() = color.b;
iterSurface.a() = color.a;
}
}
}
return surface;
}
