progs/tests: added conditional rendering test program

1 files changed, 242 insertions, 0 deletions

diff --git a/progs/tests/condrender.c b/progs/tests/condrender.c
new file mode 100644
index 00000000000..1db8a7c15af
--- /dev/null
+++ b/progs/tests/condrender.c
@@ -0,0 +1,242 @@
+/*
+ * Test GL_NV_conditional_render
+ *
+ * Brian Paul
+ * 30 Dec 2009
+ *
+ * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <GL/glew.h>
+#include <GL/glut.h>
+
+#define TEST_DISPLAY_LISTS 0
+
+static GLboolean Anim = GL_TRUE;
+static GLfloat Xpos = 0;
+static GLuint OccQuery;
+static GLint Win = 0;
+
+
+static void Idle(void)
+{
+   static int lastTime = 0;
+   static int sign = +1;
+   int time = glutGet(GLUT_ELAPSED_TIME);
+   float step;
+
+   if (lastTime == 0)
+      lastTime = time;
+   else if (time - lastTime < 20)  /* 50Hz update */
+      return;
+
+   step = (time - lastTime) / 1000.0 * sign;
+   lastTime = time;
+
+   Xpos += step;
+
+   if (Xpos > 2.5) {
+      Xpos = 2.5;
+      sign = -1;
+   }
+   else if (Xpos < -2.5) {
+      Xpos = -2.5;
+      sign = +1;
+   }
+   glutPostRedisplay();
+}
+
+
+static void Display( void )
+{
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+   glEnable(GL_DEPTH_TEST);
+
+   glMatrixMode( GL_PROJECTION );
+   glLoadIdentity();
+   glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 );
+   glMatrixMode( GL_MODELVIEW );
+   glLoadIdentity();
+   glTranslatef( 0.0, 0.0, -15.0 );
+
+   /* draw the occluding polygons */
+   glColor3f(0, 0.6, 0.8);
+   glBegin(GL_QUADS);
+   glVertex2f(-1.6, -1.5);
+   glVertex2f(-0.4, -1.5);
+   glVertex2f(-0.4,  1.5);
+   glVertex2f(-1.6,  1.5);
+
+   glVertex2f( 0.4, -1.5);
+   glVertex2f( 1.6, -1.5);
+   glVertex2f( 1.6,  1.5);
+   glVertex2f( 0.4,  1.5);
+   glEnd();
+
+   /* draw the test polygon with occlusion testing */
+   glPushMatrix();
+   glTranslatef(Xpos, 0, -0.5);
+   glScalef(0.3, 0.3, 1.0);
+   glRotatef(-90.0 * Xpos, 0, 0, 1);
+
+#if TEST_DISPLAY_LISTS
+   glNewList(10, GL_COMPILE);
+   glBeginQueryARB(GL_SAMPLES_PASSED_ARB, OccQuery);
+   glEndList();
+   glCallList(10);
+#else
+   glBeginQueryARB(GL_SAMPLES_PASSED_ARB, OccQuery);
+#endif
+
+   glColorMask(0, 0, 0, 0);
+   glDepthMask(GL_FALSE);
+
+   glBegin(GL_POLYGON);
+   glVertex3f(-1, -1, 0);
+   glVertex3f( 1, -1, 0);
+   glVertex3f( 1,  1, 0);
+   glVertex3f(-1,  1, 0);
+   glEnd();
+
+#if TEST_DISPLAY_LISTS
+   glNewList(11, GL_COMPILE);
+   glEndQueryARB(GL_SAMPLES_PASSED_ARB);
+   glEndList();
+   glCallList(11);
+#else
+   glEndQueryARB(GL_SAMPLES_PASSED_ARB);
+#endif
+
+   glColorMask(1, 1, 1, 1);
+   glDepthMask(GL_TRUE);
+
+   /* Note: disable depth test here so that we'll always see the orange
+    * box, except when it's totally culled.
+    */
+   glDisable(GL_DEPTH_TEST);
+
+   glBeginConditionalRenderNV(OccQuery, GL_QUERY_WAIT_NV);
+      /* draw the orange rect, so we can see what's going on */
+      glColor3f(0.8, 0.5, 0);
+      glBegin(GL_POLYGON);
+         glVertex3f(-1, -1, 0);
+         glVertex3f( 1, -1, 0);
+         glVertex3f( 1,  1, 0);
+         glVertex3f(-1,  1, 0);
+      glEnd();
+   glEndConditionalRenderNV();
+
+   /* always draw white outline around orange box */
+   glColor3f(1.0, 1.0, 1.0);
+   glBegin(GL_LINE_LOOP);
+      glVertex3f(-1, -1, 0);
+      glVertex3f( 1, -1, 0);
+      glVertex3f( 1,  1, 0);
+       glVertex3f(-1,  1, 0);
+   glEnd();
+
+   glPopMatrix();
+
+   glutSwapBuffers();
+}
+
+
+static void Reshape( int width, int height )
+{
+   glViewport( 0, 0, width, height );
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+   (void) x;
+   (void) y;
+   switch (key) {
+   case 27:
+      glDeleteQueriesARB(1, &OccQuery);
+      glutDestroyWindow(Win);
+      exit(0);
+      break;
+   case ' ':
+      Anim = !Anim;
+      if (Anim)
+         glutIdleFunc(Idle);
+      else
+         glutIdleFunc(NULL);
+      break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void SpecialKey( int key, int x, int y )
+{
+   const GLfloat step = 0.1;
+   (void) x;
+   (void) y;
+   switch (key) {
+   case GLUT_KEY_LEFT:
+      Xpos -= step;
+      break;
+   case GLUT_KEY_RIGHT:
+      Xpos += step;
+      break;
+   }
+   glutPostRedisplay();
+}
+
+
+static void Init( void )
+{
+   if (!glutExtensionSupported("GL_ARB_occlusion_query") ||
+       !glutExtensionSupported("GL_NV_conditional_render")) {
+      printf("Sorry, this demo requires the extensions:\n");
+      printf("  GL_ARB_occlusion_query\n");
+      printf("  GL_NV_conditional_render\n");
+      exit(-1);
+   }
+
+   glGenQueriesARB(1, &OccQuery);
+   assert(OccQuery > 0);
+}
+
+
+int main( int argc, char *argv[] )
+{
+   glutInitWindowSize( 400, 400 );
+   glutInit( &argc, argv );
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
+   Win = glutCreateWindow(argv[0]);
+   glewInit();
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutSpecialFunc( SpecialKey );
+   glutIdleFunc( Idle );
+   glutDisplayFunc( Display );
+   Init();
+   glutMainLoop();
+   return 0;
+}