projects / occt.git / blame
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1 | // File: OpenGl_PrinterContext.hxx |
| 2 | // Created: 20.05.11 10:00:00 | |
| 3 | // Author: Anton POLETAEV | |
| 4 | ||
| 5 | #ifndef _OPENGL_PRINTERCONTEXT_H | |
| 6 | #define _OPENGL_PRINTERCONTEXT_H | |
| 7 | ||
| 8 | #include <MMgt_TShared.hxx> | |
| 9 | #include <Standard.hxx> | |
| 10 | #include <Standard_DefineHandle.hxx> | |
| 11 | #include <Handle_MMgt_TShared.hxx> | |
| 12 | #include <OpenGl_tgl_all.hxx> | |
| 13 | #include <NCollection_DataMap.hxx> | |
| 14 | #include <InterfaceGraphic_Graphic3d.hxx> | |
| 15 | #include <InterfaceGraphic_Visual3d.hxx> | |
| 16 | #include <TColStd_Array2OfReal.hxx> | |
| 17 | ||
| 18 | class Standard_Transient; | |
| 19 | class Handle(Standard_Type); | |
| 20 | class Handle(MMgt_TShared); | |
| 21 | class OpenGl_PrinterContext; | |
| 22 | ||
| 23 | DEFINE_STANDARD_HANDLE(OpenGl_PrinterContext,MMgt_TShared) | |
| 24 | ||
| 25 | //! Class provides specific information for redrawing view to offscreen buffer | |
| 26 | //! on printing. The information is: projection matrixes for tiling, | |
| 27 | //! scaling factors for text/markers and layer viewport dimensions. | |
| 28 | //! The OpenGl_PrinterContext class allows to have only one global instance | |
| 29 | //! that can be accessed by GetPrinterContext() during printing operation. | |
| 30 | //! The class instance can be created only by call_togl_print(). | |
| 31 | class OpenGl_PrinterContext : public MMgt_TShared | |
| 32 | { | |
| 33 | ||
| 34 | public: | |
| 35 | ||
| 36 | //! Get the PrinterContext instance assigned for OpenGl context. | |
| 37 | //! Return NULL, if there is no current printing operation and | |
| 38 | //! there is no assigned instance for "theCtx" OpenGl context. | |
| 39 | static OpenGl_PrinterContext* GetPrinterContext(GLCONTEXT theCtx); | |
| 40 | ||
| 41 | //! Get view projection transformation matrix. | |
| 42 | const TColStd_Array2OfReal& GetProjTransformation () | |
| 43 | { | |
| 44 | return myProjTransform; | |
| 45 | } | |
| 46 | ||
| 47 | //! Get view projection transformation matrix. | |
| 48 | void GetProjTransformation (GLfloat theMatrix[16]); | |
| 49 | ||
| 50 | //! Get text/markers scale factor | |
| 51 | void GetScale (GLfloat& theScaleX, GLfloat& theScaleY) | |
| 52 | { | |
| 53 | theScaleX = myScaleX; | |
| 54 | theScaleY = myScaleY; | |
| 55 | } | |
| 56 | ||
| 57 | //! Get layer viewport dimensions | |
| 58 | void GetLayerViewport (GLsizei& theViewportX, | |
| 59 | GLsizei& theViewportY) | |
| 60 | { | |
| 61 | theViewportX = myLayerViewportX; | |
| 62 | theViewportY = myLayerViewportY; | |
| 63 | } | |
| 64 | ||
| 65 | private: | |
| 66 | ||
| 67 | //! Constructor | |
| 68 | OpenGl_PrinterContext (GLCONTEXT theCtx); | |
| 69 | ||
| 70 | //! Destructor | |
| 71 | virtual ~OpenGl_PrinterContext (); | |
| 72 | ||
| 73 | //! Deactivate current printing context. | |
| 74 | //! Useful when you need to redraw in usual mode the same OpenGl context | |
| 75 | //! that you used for printing right after printing, before the | |
| 76 | //! OpenGl_PrinterContext instance destroyed. | |
| 77 | void Deactivate (); | |
| 78 | ||
| 79 | //! Set view projection transformation matrix for printing/tiling purposes | |
| 80 | //! theProjTransform parameter should be an 4x4 array. | |
| 81 | bool SetProjTransformation (TColStd_Array2OfReal& theProjTransform); | |
| 82 | ||
| 83 | //! Set text scale factor | |
| 84 | void SetScale (GLfloat theScaleX, GLfloat theScaleY) | |
| 85 | { | |
| 86 | myScaleX = theScaleX; | |
| 87 | myScaleY = theScaleY; | |
| 88 | } | |
| 89 | ||
| 90 | //! Set layer viewport dimensions | |
| 91 | void SetLayerViewport (GLsizei theViewportX, | |
| 92 | GLsizei theViewportY) | |
| 93 | { | |
| 94 | myLayerViewportX = theViewportX; | |
| 95 | myLayerViewportY = theViewportY; | |
| 96 | } | |
| 97 | ||
| 98 | private: | |
| 99 | ||
| 100 | static OpenGl_PrinterContext* g_PrinterContext; | |
| 101 | static GLCONTEXT g_ContextId; | |
| 102 | TColStd_Array2OfReal myProjTransform; | |
| 103 | GLfloat myScaleX; | |
| 104 | GLfloat myScaleY; | |
| 105 | GLsizei myLayerViewportX; | |
| 106 | GLsizei myLayerViewportY; | |
| 107 | GLCONTEXT myCtx; | |
| 108 | ||
| 109 | // the printer context could be created only in method call_togl_print | |
| 110 | friend Standard_Boolean call_togl_print (CALL_DEF_VIEW *, CALL_DEF_LAYER *, | |
| 111 | CALL_DEF_LAYER *, | |
| 112 | const Aspect_Drawable, const int, | |
| 113 | const char*, const int, const float); | |
| 114 | }; | |
| 115 | ||
| 116 | #endif |