3 * - By John Hodge (thePowersGang)
8 #include <CSurface.hpp>
12 #include <system_error>
17 CSurface::CSurface(int x, int y, unsigned int w, unsigned int h):
24 m_data = new uint32_t[w * h];
32 uint64_t CSurface::GetSHMHandle()
34 size_t size = m_rect.m_w*m_rect.m_h*4;
37 // 2. Allocate a copy in SHM
38 m_fd = _SysOpen("/Devices/shm/anon", OPENFLAG_WRITE|OPENFLAG_READ);
40 _SysDebug("GetSHMHandle: Unable to open anon SHM");
43 // 1. Free local buffer
45 _SysTruncate(m_fd, size);
49 _SysMUnMap(m_data, size);
52 m_data = static_cast<uint32_t*>( _SysMMap(nullptr, size, MMAP_PROT_WRITE, 0, m_fd, 0) );
53 if(!m_data) throw ::std::system_error(errno, ::std::system_category());
55 return _SysMarshalFD(m_fd);
58 void CSurface::Resize(unsigned int W, unsigned int H)
63 // TODO: Should I maintain window contents sanely? NOPE!
65 m_data = new uint32_t[W * H];
69 //_SysIOCtl(m_fd, SHM_IOCTL_SETSIZE, W*H*4);
74 void CSurface::DrawScanline(unsigned int row, unsigned int x_ofs, unsigned int w, const void* data)
76 if( row >= m_rect.m_h )
77 throw ::std::out_of_range("CSurface::DrawScanline row");
78 if( x_ofs >= m_rect.m_w )
79 throw ::std::out_of_range("CSurface::DrawScanline x_ofs");
82 throw ::std::out_of_range("CSurface::DrawScanline width");
84 size_t ofs = row*m_rect.m_w + x_ofs;
85 ::memcpy( &m_data[ofs], data, w*4 );
88 const uint32_t* CSurface::GetScanline(unsigned int row, unsigned int x_ofs) const
90 if( row >= m_rect.m_h )
91 throw ::std::out_of_range("CSurface::GetScanline row");
92 if( x_ofs >= m_rect.m_w )
93 throw ::std::out_of_range("CSurface::GetScanline x_ofs");
95 return &m_data[row * m_rect.m_w + x_ofs];