tags/0.8/sample/jogl/jp/nyatla/nyartoolkit/jogl/utils/NyARGLUtil.java

   1 /**\r
   2  * NyARToolkit用のJOGL支援関数群\r
   3  * (c)2008 A虎＠nyatla.jp\r
   4  * airmail(at)ebony.plala.or.jp\r
   5  * http://nyatla.jp/\r
   6  */\r
   7 package jp.nyatla.nyartoolkit.jogl.utils;\r
   8 import java.nio.ByteBuffer;\r
   9 import java.nio.IntBuffer;\r
  10 \r
  11 import javax.media.opengl.GL;\r
  12 import javax.media.opengl.glu.GLU;\r
  13 \r
  14 import jp.nyatla.nyartoolkit.core.*;\r
  15 \r
  16 public class NyARGLUtil\r
  17 {\r
  18     private NyARParam ar_param;\r
  19     private javax.media.opengl.GL gl;\r
  20     private javax.media.opengl.glu.GLU glu;\r
  21     public NyARGLUtil(javax.media.opengl.GL i_gl,NyARParam i_camera_param)\r
  22     {\r
  23         this.ar_param=i_camera_param;\r
  24         this.gl=i_gl;\r
  25         this.glu=new GLU();\r
  26     }\r
  27     /**\r
  28      * GLNyARRaster_RGBをバックグラウンドに書き出す。\r
  29      * @param image\r
  30      * @param zoom\r
  31      */\r
  32     public void drawBackGround(GLNyARRaster_RGB i_raster,double i_zoom)\r
  33     {\r
  34         IntBuffer texEnvModeSave=IntBuffer.allocate(1); \r
  35         boolean lightingSave;\r
  36         boolean depthTestSave;\r
  37         javax.media.opengl.GL gl_=this.gl;\r
  38         \r
  39         // Prepare an orthographic projection, set camera position for 2D drawing, and save GL state.\r
  40         gl_.glGetTexEnviv(GL.GL_TEXTURE_ENV, GL.GL_TEXTURE_ENV_MODE, texEnvModeSave); // Save GL texture environment mode.\r
  41         if (texEnvModeSave.array()[0] != GL.GL_REPLACE){\r
  42         gl_.glTexEnvi(GL.GL_TEXTURE_ENV, GL.GL_TEXTURE_ENV_MODE, GL.GL_REPLACE);\r
  43         }\r
  44         lightingSave = gl_.glIsEnabled(GL.GL_LIGHTING);                 // Save enabled state of lighting.\r
  45         if (lightingSave == true){\r
  46             gl_.glDisable(GL.GL_LIGHTING);\r
  47         }\r
  48         depthTestSave = gl_.glIsEnabled(GL.GL_DEPTH_TEST);              // Save enabled state of depth test.\r
  49         if (depthTestSave == true){\r
  50             gl_.glDisable(GL.GL_DEPTH_TEST);\r
  51         }\r
  52         gl_.glMatrixMode(GL.GL_PROJECTION);\r
  53         gl_.glPushMatrix();\r
  54         gl_.glLoadIdentity();\r
  55         glu.gluOrtho2D(0.0,ar_param.getX(),0.0,ar_param.getY());\r
  56         gl_.glMatrixMode(GL.GL_MODELVIEW);\r
  57         gl_.glPushMatrix();\r
  58         gl_.glLoadIdentity();\r
  59         arglDispImageStateful(i_raster,i_zoom);\r
  60 \r
  61 \r
  62         // Restore previous projection, camera position, and GL state.\r
  63         gl_.glMatrixMode(GL.GL_PROJECTION);\r
  64         gl_.glPopMatrix();\r
  65         gl_.glMatrixMode(GL.GL_MODELVIEW);\r
  66         gl_.glPopMatrix();\r
  67         if (depthTestSave){\r
  68             gl_.glEnable(GL.GL_DEPTH_TEST);                     // Restore enabled state of depth test.\r
  69         }\r
  70         if (lightingSave){\r
  71             gl_.glEnable(GL.GL_LIGHTING);                       // Restore enabled state of lighting.\r
  72         }\r
  73         if (texEnvModeSave.get(0) != GL.GL_REPLACE){\r
  74             gl_.glTexEnvi(GL.GL_TEXTURE_ENV, GL.GL_TEXTURE_ENV_MODE, texEnvModeSave.get(0)); // Restore GL texture environment mode.\r
  75         }\r
  76         gl_.glEnd();\r
  77     }\r
  78     /**\r
  79      * arglDispImageStateful関数モドキ\r
  80      * @param image\r
  81      * @param zoom\r
  82      */\r
  83     private void arglDispImageStateful(GLNyARRaster_RGB i_raster,double zoom)\r
  84     {\r
  85         javax.media.opengl.GL gl_=this.gl;\r
  86         int width =i_raster.getWidth();\r
  87         int height=i_raster.getHeight();\r
  88         float zoomf;\r
  89         IntBuffer params=IntBuffer.allocate(4);\r
  90         zoomf = (float)zoom;\r
  91         gl_.glDisable(GL.GL_TEXTURE_2D);\r
  92         gl_.glGetIntegerv(GL.GL_VIEWPORT,params);\r
  93         gl_.glPixelZoom(zoomf * ((float)(params.get(2)) / (float)width),-zoomf * ((float)(params.get(3)) / (float)height));\r
  94         gl_.glRasterPos2f(0.0f,(float)height);\r
  95         gl_.glPixelStorei(GL.GL_UNPACK_ALIGNMENT, 1);\r
  96         ByteBuffer buf=ByteBuffer.wrap(i_raster.getGLRgbArray());\r
  97         gl_.glDrawPixels(width,height,i_raster.getGLPixelFlag(),GL.GL_UNSIGNED_BYTE,buf);\r
  98     }     \r
  99 }\r