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-rw-r--r--progs/demos/arbocclude2.c314
1 files changed, 0 insertions, 314 deletions
diff --git a/progs/demos/arbocclude2.c b/progs/demos/arbocclude2.c
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index 195a23803a..0000000000
--- a/progs/demos/arbocclude2.c
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@@ -1,314 +0,0 @@
-/*
- * GL_ARB_occlusion_query demo
- *
- * Brian Paul
- * 12 June 2003
- *
- * Copyright (C) 2003 Brian Paul 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
- * BRIAN PAUL 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>
-
-static GLboolean Anim = GL_TRUE;
-static GLfloat Xpos = 0;
-static GLuint OccQuery1;
-static GLuint OccQuery2;
-static GLint Win = 0;
-
-
-static void
-PrintString(const char *s)
-{
- while (*s) {
- glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int) *s);
- s++;
- }
-}
-
-
-
-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 )
-{
- GLuint passed1, passed2;
- GLint ready;
- char s[100];
-
- glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
-
- 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();
-
-#if defined(GL_ARB_occlusion_query)
- glColorMask(0, 0, 0, 0);
- glDepthMask(GL_FALSE);
-
- /* draw the first polygon with occlusion testing */
- glPushMatrix();
- glTranslatef(Xpos, 0.4, -0.5);
- glScalef(0.3, 0.3, 1.0);
- glRotatef(-90.0 * Xpos, 0, 0, 1);
-
- glBeginQueryARB(GL_SAMPLES_PASSED_ARB, OccQuery1);
-
- glBegin(GL_POLYGON);
- glVertex3f(-1, -1, 0);
- glVertex3f( 1, -1, 0);
- glVertex3f( 1, 1, 0);
- glVertex3f(-1, 1, 0);
- glEnd();
-
- glEndQueryARB(GL_SAMPLES_PASSED_ARB);
-
- /* draw the second polygon with occlusion testing */
- glPopMatrix();
- glPushMatrix();
- glTranslatef(Xpos, -0.4, -0.5);
- glScalef(0.3, 0.3, 1.0);
-
- glBeginQueryARB(GL_SAMPLES_PASSED_ARB, OccQuery2);
-
- glBegin(GL_POLYGON);
- glVertex3f(-1, -1, 0);
- glVertex3f( 1, -1, 0);
- glVertex3f( 1, 1, 0);
- glVertex3f(-1, 1, 0);
- glEnd();
-
- glEndQueryARB(GL_SAMPLES_PASSED_ARB);
-
- /* turn off occlusion testing */
- glColorMask(1, 1, 1, 1);
- glDepthMask(GL_TRUE);
-
- do {
- /* do useful work here, if any */
- glGetQueryObjectivARB(OccQuery1, GL_QUERY_RESULT_AVAILABLE_ARB, &ready);
- } while (!ready);
- glGetQueryObjectuivARB(OccQuery1, GL_QUERY_RESULT_ARB, &passed1);
-
- do {
- /* do useful work here, if any */
- glGetQueryObjectivARB(OccQuery2, GL_QUERY_RESULT_AVAILABLE_ARB, &ready);
- } while (!ready);
- glGetQueryObjectuivARB(OccQuery2, GL_QUERY_RESULT_ARB, &passed2);
-#endif /* GL_ARB_occlusion_query */
-
- /* draw the second 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();
-
- glPopMatrix();
- glPushMatrix();
- glTranslatef(Xpos, 0.4, -0.5);
- glScalef(0.3, 0.3, 1.0);
- glRotatef(-90.0 * Xpos, 0, 0, 1);
-
- /* draw the first rect, so we can see what's going on */
- glBegin(GL_POLYGON);
- glVertex3f(-1, -1, 0);
- glVertex3f( 1, -1, 0);
- glVertex3f( 1, 1, 0);
- glVertex3f(-1, 1, 0);
- glEnd();
-
- glPopMatrix();
-
- /* Print result message */
- glMatrixMode( GL_PROJECTION );
- glLoadIdentity();
- glOrtho( -1.0, 1.0, -1.0, 1.0, -1.0, 1.0 );
- glMatrixMode( GL_MODELVIEW );
- glLoadIdentity();
-
- glColor3f(1, 1, 1);
-#if defined(GL_ARB_occlusion_query)
- sprintf(s, " %4d Fragments Visible", passed1);
- glRasterPos3f(-0.50, -0.6, 0);
- PrintString(s);
- if (!passed1) {
- glRasterPos3f(-0.25, -0.7, 0);
- PrintString("Fully Occluded");
- }
- sprintf(s, " %4d Fragments Visible", passed2);
- glRasterPos3f(-0.50, -0.8, 0);
- PrintString(s);
- if (!passed2) {
- glRasterPos3f(-0.25, -0.9, 0);
- PrintString("Fully Occluded");
- }
-#else
- glRasterPos3f(-0.25, -0.8, 0);
- PrintString("GL_ARB_occlusion_query not available at compile time");
-#endif /* GL_ARB_occlusion_query */
-
- 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:
- 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 )
-{
- const char *ext = (const char *) glGetString(GL_EXTENSIONS);
- GLint bits;
-
- if (!strstr(ext, "GL_ARB_occlusion_query")) {
- printf("Sorry, this demo requires the GL_ARB_occlusion_query extension\n");
- exit(-1);
- }
-
-#if defined(GL_ARB_occlusion_query)
- glGetQueryivARB(GL_SAMPLES_PASSED_ARB, GL_QUERY_COUNTER_BITS_ARB, &bits);
- if (!bits) {
- printf("Hmmm, GL_QUERY_COUNTER_BITS_ARB is zero!\n");
- exit(-1);
- }
-#endif /* GL_ARB_occlusion_query */
-
- glGetIntegerv(GL_DEPTH_BITS, &bits);
- printf("Depthbits: %d\n", bits);
-
-#if defined(GL_ARB_occlusion_query)
- glGenQueriesARB(1, &OccQuery1);
- assert(OccQuery1 > 0);
- glGenQueriesARB(1, &OccQuery2);
- assert(OccQuery2 > 0);
-#endif /* GL_ARB_occlusion_query */
-
- glEnable(GL_DEPTH_TEST);
-}
-
-
-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;
-}
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