bool transparentVerticalScanline( const SurfaceT<T> &surface, int32_t column, int32_t y1, int32_t y2 )
{
const T *dstPtr = surface.getDataAlpha( Vec2i( column, y1 ) );
int32_t rowBytes = surface.getRowBytes();
for( int32_t y = y1; y < y2; ++y ) {
if( *dstPtr ) return false;
dstPtr += rowBytes;
}
return true;
}
bool transparentHorizontalScanline( const SurfaceT<T> &surface, int32_t row, int32_t x1, int32_t x2 )
{
const T *dstPtr = surface.getDataAlpha( Vec2i( x1, row ) );
uint8_t inc = surface.getPixelInc();
for( int32_t x = x1; x < x2; ++x ) {
if( *dstPtr ) return false;
dstPtr += inc;
}
return true;
}