| 3bffef55 |
1 | // Copyright (c) 2016 OPEN CASCADE SAS |
| 2 | // |
| 3 | // This file is part of Open CASCADE Technology software library. |
| 4 | // |
| 5 | // This library is free software; you can redistribute it and/or modify it under |
| 6 | // the terms of the GNU Lesser General Public License version 2.1 as published |
| 7 | // by the Free Software Foundation, with special exception defined in the file |
| 8 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
| 9 | // distribution for complete text of the license and disclaimer of any warranty. |
| 10 | // |
| 11 | // Alternatively, this file may be used under the terms of Open CASCADE |
| 12 | // commercial license or contractual agreement. |
| 13 | |
| 14 | #ifndef _Graphic3d_CameraTile_HeaderFile |
| 15 | #define _Graphic3d_CameraTile_HeaderFile |
| 16 | |
| 17 | #include <Graphic3d_Vec2.hxx> |
| 18 | #include <Standard_Integer.hxx> |
| 19 | #include <Standard_TypeDef.hxx> |
| 20 | |
| 21 | //! Class defines the area (Tile) inside a view. |
| 22 | class Graphic3d_CameraTile |
| 23 | { |
| 24 | public: |
| 25 | |
| 26 | Graphic3d_Vec2i TotalSize; //!< total size of the View area, in pixels |
| 27 | Graphic3d_Vec2i TileSize; //!< size of the Tile, in pixels |
| 28 | Graphic3d_Vec2i Offset; //!< the lower-left corner of the Tile relative to the View area (or upper-left if IsTopDown is true), in pixels |
| 29 | bool IsTopDown; //!< indicate the offset coordinate system - lower-left (default) or top-down |
| 30 | |
| 31 | public: |
| 32 | |
| 33 | //! Default constructor. |
| 34 | //! Initializes the empty Tile of zero size and lower-left offset orientation. |
| 35 | //! Such Tile is considered uninitialized (invalid). |
| 36 | Graphic3d_CameraTile() : IsTopDown (false) {} |
| 37 | |
| 38 | //! Return true if Tile has been defined. |
| 39 | bool IsValid() const |
| 40 | { |
| 41 | return TotalSize.x() > 0 && TotalSize.y() > 0 |
| 42 | && TileSize.x() > 0 && TileSize.y() > 0; |
| 43 | } |
| 44 | |
| 45 | //! Return offset position from lower-left corner. |
| 46 | Graphic3d_Vec2i OffsetLowerLeft() const |
| 47 | { |
| 48 | return Graphic3d_Vec2i (Offset.x(), |
| 49 | !IsTopDown |
| 50 | ? Offset.y() |
| 51 | : TotalSize.y() - Offset.y() - 1); |
| 52 | } |
| 53 | |
| 54 | //! Return the copy cropped by total size |
| 55 | Graphic3d_CameraTile Cropped() const |
| 56 | { |
| 57 | Graphic3d_CameraTile aTile = *this; |
| 58 | if (!IsValid()) |
| 59 | { |
| 60 | return aTile; |
| 61 | } |
| 62 | |
| 63 | aTile.Offset.x() = Max (Offset.x(), 0); |
| 64 | aTile.Offset.y() = Max (Offset.y(), 0); |
| 65 | |
| 66 | const Standard_Integer anX = Min (Offset.x() + TileSize.x(), TotalSize.x()); |
| 67 | const Standard_Integer anY = Min (Offset.y() + TileSize.y(), TotalSize.y()); |
| 68 | aTile.TileSize.x() = anX - Offset.x(); |
| 69 | aTile.TileSize.y() = anY - Offset.y(); |
| 70 | return aTile; |
| 71 | } |
| 72 | |
| 73 | //! Equality check. |
| 74 | bool operator== (const Graphic3d_CameraTile& theOther) const |
| 75 | { |
| 76 | const Graphic3d_Vec2i anOffset1 = OffsetLowerLeft(); |
| 77 | const Graphic3d_Vec2i anOffset2 = theOther.OffsetLowerLeft(); |
| 78 | return TotalSize.x() == theOther.TotalSize.x() |
| 79 | && TotalSize.y() == theOther.TotalSize.y() |
| 80 | && TileSize.x() == theOther.TileSize.x() |
| 81 | && TileSize.y() == theOther.TileSize.y() |
| 82 | && anOffset1.x() == anOffset2.x() |
| 83 | && anOffset1.y() == anOffset2.y(); |
| 84 | } |
| 85 | |
| 86 | }; |
| 87 | |
| 88 | #endif // _Graphic3d_CameraTile_HeaderFile |
projects / occt.git / blame