Open Inventor Reference
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00001 /* 00002 * 00003 * Copyright (C) 2000 Silicon Graphics, Inc. All Rights Reserved. 00004 * 00005 * This library is free software; you can redistribute it and/or 00006 * modify it under the terms of the GNU Lesser General Public 00007 * License as published by the Free Software Foundation; either 00008 * version 2.1 of the License, or (at your option) any later version. 00009 * 00010 * This library is distributed in the hope that it will be useful, 00011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00013 * Lesser General Public License for more details. 00014 * 00015 * Further, this software is distributed without any warranty that it is 00016 * free of the rightful claim of any third person regarding infringement 00017 * or the like. Any license provided herein, whether implied or 00018 * otherwise, applies only to this software file. Patent licenses, if 00019 * any, provided herein do not apply to combinations of this program with 00020 * other software, or any other product whatsoever. 00021 * 00022 * You should have received a copy of the GNU Lesser General Public 00023 * License along with this library; if not, write to the Free Software 00024 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00025 * 00026 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, 00027 * Mountain View, CA 94043, or: 00028 * 00029 * http://www.sgi.com 00030 * 00031 * For further information regarding this notice, see: 00032 * 00033 * http://oss.sgi.com/projects/GenInfo/NoticeExplan/ 00034 * 00035 */ 00036 00037 00038 /* 00039 * Copyright (C) 1990,91 Silicon Graphics, Inc. 00040 * 00041 _______________________________________________________________________ 00042 ______________ S I L I C O N G R A P H I C S I N C . ____________ 00043 | 00044 | $Revision: 1.1.1.1 $ 00045 | 00046 | Description: 00047 | This file contains the SbViewportRegion class definition. 00048 | 00049 | Author(s) : Paul S. Strauss 00050 | 00051 ______________ S I L I C O N G R A P H I C S I N C . ____________ 00052 _______________________________________________________________________ 00053 */ 00054 00055 #ifndef _SB_VIEWPORT_REGION_ 00056 #define _SB_VIEWPORT_REGION_ 00057 00058 #include <Inventor/system/SbSystem.h> 00059 00060 00061 #include <Inventor/SbLinear.h> 00062 00065 00080 00081 00082 class INVENTOR_API SbViewportRegion { 00083 public: 00084 00086 SbViewportRegion(); 00087 00089 SbViewportRegion(short width, short height); 00090 00092 SbViewportRegion(SbVec2s winSize); 00093 00095 SbViewportRegion(const SbViewportRegion &vpReg); 00096 00098 void setWindowSize(short width, short height) 00099 { setWindowSize(SbVec2s(width, height)); } 00100 00103 void setWindowSize(SbVec2s winSize); 00104 00107 void setViewport(float left, float bottom, 00108 float width, float height) 00109 { setViewport(SbVec2f(left, bottom), SbVec2f(width, height)); } 00110 00113 void setViewport(SbVec2f origin, SbVec2f size); 00114 00117 void setViewportPixels(short left, short bottom, 00118 short width, short height) 00119 { setViewportPixels(SbVec2s(left, bottom), SbVec2s(width, height)); } 00120 00123 void setViewportPixels(SbVec2s origin, SbVec2s size); 00124 00126 const SbVec2s & getWindowSize() const { return windowSize; } 00127 00129 const SbVec2f & getViewportOrigin() const { return vpOrigin; } 00130 00132 const SbVec2s & getViewportOriginPixels() const { return vpOriginPix; } 00133 00135 const SbVec2f & getViewportSize() const { return vpSize; } 00136 00138 const SbVec2s & getViewportSizePixels() const { return vpSizePix;} 00139 00141 float getViewportAspectRatio() const 00142 { return (vpSizePix[1] == 0 ? 1.0f : 00143 (float) vpSizePix[0] / (float) vpSizePix[1]); } 00144 00148 void scaleWidth(float ratio); 00152 void scaleHeight(float ratio); 00153 00157 void setPixelsPerInch(float ppi) { pixelsPerInch = ppi; } 00158 float getPixelsPerInch() const { return pixelsPerInch; } 00159 00161 float getPixelsPerPoint() const 00162 { return pixelsPerInch / 72.0f; } 00163 00165 friend int operator ==(const SbViewportRegion ®1, 00166 const SbViewportRegion ®2); 00167 00168 private: 00169 SbVec2s windowSize; 00170 SbVec2f vpOrigin; 00171 SbVec2s vpOriginPix; 00172 SbVec2f vpSize; 00173 SbVec2s vpSizePix; 00174 SbBool vpSet; 00175 float pixelsPerInch; 00176 00178 void setFullViewport(); 00179 00181 void adjustViewport(); 00182 }; 00183 00184 #endif /* _SB_VIEWPORT_REGION_ */