Method Create

trinity/UI/Tr2MouseCursor.cpp:266–432

-------------------------------------------------------------------------------------- Description: Creates a new cursor. Arguments: bitmap - Bitmap containing cursor image. Needs to have B8G8R8A8 format and usually should be 32 by 32 pixels. hotspotX - X coordinate of hotspot hotspotY - Y coordinate of hotspot Return Value: true If the cursor was successfully created false Otherwise -------------

//   false Otherwise
// --------------------------------------------------------------------------------------
bool Tr2MouseCursor::Create( Tr2HostBitmap* bitmap, int hotspotX, int hotspotY, const std::vector<Tr2HostBitmap*>& representations )
{
	if( bitmap == nullptr )
	{
		CCP_LOGERR( "Tr2MouseCursor.Create: nullptr is passed for bitmap" );
		return false;
	}

#ifdef _WIN32
	if( m_cursor )
	{
		DeleteObject( m_cursor );
	}
	m_cursor = nullptr;
#endif
	// Check the format: we really need B8G8R8A8 for cursor,
	// but we also support BC1 and BC3 for compatibility with
	// existing cursor images
	switch( bitmap->GetFormat() )
	{
	case Tr2RenderContextEnum::PIXEL_FORMAT_BC1_TYPELESS:
	case Tr2RenderContextEnum::PIXEL_FORMAT_BC1_UNORM:
	case Tr2RenderContextEnum::PIXEL_FORMAT_BC1_UNORM_SRGB:

	case Tr2RenderContextEnum::PIXEL_FORMAT_BC2_TYPELESS:
	case Tr2RenderContextEnum::PIXEL_FORMAT_BC2_UNORM:
	case Tr2RenderContextEnum::PIXEL_FORMAT_BC2_UNORM_SRGB:

	case Tr2RenderContextEnum::PIXEL_FORMAT_B8G8R8A8_TYPELESS:
	case Tr2RenderContextEnum::PIXEL_FORMAT_B8G8R8A8_UNORM:
	case Tr2RenderContextEnum::PIXEL_FORMAT_B8G8R8A8_UNORM_SRGB:
		break;
	default:
		CCP_LOGERR( "Tr2MouseCursor.Create: unsupported bitmap format (only B8G8R8A8, BC1 and BC2 are supported)" );
		return false;
	}

#if defined( _WIN32 )
	BITMAPV5HEADER bi;
	ZeroMemory( &bi, sizeof( BITMAPV5HEADER ) );
	bi.bV5Size = sizeof( BITMAPV5HEADER );
	bi.bV5Width = bitmap->GetWidth();
	bi.bV5Height = bitmap->GetHeight();
	bi.bV5Planes = 1;
	bi.bV5BitCount = 32;
	bi.bV5Compression = BI_BITFIELDS;
	bi.bV5RedMask = 0x00FF0000;
	bi.bV5GreenMask = 0x0000FF00;
	bi.bV5BlueMask = 0x000000FF;
	bi.bV5AlphaMask = 0xFF000000;
	bi.bV5CSType = LCS_WINDOWS_COLOR_SPACE;

	HDC hdc;
	hdc = GetDC( nullptr );

	void* bits;
	HBITMAP bmp = CreateDIBSection( hdc, (BITMAPINFO*)&bi, DIB_RGB_COLORS, &bits, NULL, 0 );