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Diffstat (limited to 'progs/tests/condrender.c')
| -rw-r--r-- | progs/tests/condrender.c | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/progs/tests/condrender.c b/progs/tests/condrender.c new file mode 100644 index 0000000000..1db8a7c15a --- /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; +} |