+++ /dev/null
-/*
- * Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
- *
- * Permission to use, copy, modify, distribute, and sell this software and
- * its documentation for any purpose is hereby granted without fee, provided
- * that (i) the above copyright notices and this permission notice appear in
- * all copies of the software and related documentation, and (ii) the name of
- * Silicon Graphics may not be used in any advertising or
- * publicity relating to the software without the specific, prior written
- * permission of Silicon Graphics.
- *
- * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF
- * ANY KIND,
- * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
- * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
- *
- * IN NO EVENT SHALL SILICON GRAPHICS BE LIABLE FOR
- * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
- * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
- * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
- * OF THIS SOFTWARE.
- */
-
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <GL/glut.h>
-
-GLenum doubleBuffer = 1;
-int win;
-static float tx = 0;
-static float ty = 0;
-static float tw = 0;
-static float th = 0;
-static float z = -5;
-
-
-static float win_width = 250;
-static float win_height = 250;
-static enum {
- ORTHO,
- FRUSTUM,
- MODE_MAX
-} mode = ORTHO;
-
-static void Init(void)
-{
- fprintf(stderr, "GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
- fprintf(stderr, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
- fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
- fflush(stderr);
-
- glClearColor(0, 0, 0, 0.0);
-}
-
-static void Reshape(int width, int height)
-{
- win_width = width;
- win_height = height;
- glutPostRedisplay();
-}
-
-
-static void Key(unsigned char key, int x, int y)
-{
- switch (key) {
- case 27:
- exit(0);
- case 'w':
- tw += 1.0;
- break;
- case 'W':
- tw -= 1.0;
- break;
- case 'h':
- th += 1.0;
- break;
- case 'H':
- th -= 1.0;
- break;
-
- case 'z':
- z += 1.0;
- break;
- case 'Z':
- z -= 1.0;
- break;
- case 'm':
- mode++;
- mode %= MODE_MAX;
- break;
- case ' ':
- tw = th = tx = ty = 0;
- z = -5;
- mode = ORTHO;
- break;
- default:
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void Draw(void)
-{
- int i;
- float w = tw + win_width;
- float h = th + win_height;
-
- fprintf(stderr, "glViewport(%f %f %f %f)\n", tx, ty, w, h);
- fprintf(stderr, "mode: %s\n", mode == FRUSTUM ? "FRUSTUM" : "ORTHO");
- fprintf(stderr, "z: %f\n", z);
- fflush(stderr);
-
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
-
- switch (mode) {
- case FRUSTUM:
- glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 25.0);
- break;
- case ORTHO:
- default:
- glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
- break;
- }
-
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
-
-
- glClear(GL_COLOR_BUFFER_BIT);
-
-
- /***********************************************************************
- * Should be clipped to be no larger than the triangles:
- */
- glViewport(tx, ty, w, h);
-
- glBegin(GL_POLYGON);
- glColor3f(1,1,0);
- glVertex3f(-100, -100, z);
- glVertex3f(-100, 100, z);
- glVertex3f(100, 100, z);
- glVertex3f(100, -100, z);
- glEnd();
-
- glBegin(GL_POLYGON);
- glColor3f(0,1,1);
- glVertex3f(-10, -10, z);
- glVertex3f(-10, 10, z);
- glVertex3f(10, 10, z);
- glVertex3f(10, -10, z);
- glEnd();
-
- glBegin(GL_POLYGON);
- glColor3f(1,0,0);
- glVertex3f(-2, -2, z);
- glVertex3f(-2, 2, z);
- glVertex3f(2, 2, z);
- glVertex3f(2, -2, z);
- glEnd();
-
-
- glBegin(GL_POLYGON);
- glColor3f(.5,.5,1);
- glVertex3f(-1, -1, z);
- glVertex3f(-1, 1, z);
- glVertex3f(1, 1, z);
- glVertex3f(1, -1, z);
- glEnd();
-
- /***********************************************************************
- */
- glViewport(0, 0, win_width, win_height);
- glBegin(GL_LINES);
- glColor3f(1,1,0);
- glVertex3f(-1, 0, z);
- glVertex3f(1, 0, z);
-
- glVertex3f(0, -1, z);
- glVertex3f(0, 1, z);
- glEnd();
-
-
- /***********************************************************************
- */
- glViewport(tx, ty, w, h);
- glBegin(GL_TRIANGLES);
- glColor3f(1,0,0);
- glVertex3f(-1, -1, z);
- glVertex3f(0, -1, z);
- glVertex3f(-.5, -.5, z);
-
- glColor3f(1,1,1);
- glVertex3f(0, -1, z);
- glVertex3f(1, -1, z);
- glVertex3f(.5, -.5, z);
-
- glVertex3f(-.5, -.5, z);
- glVertex3f(.5, -.5, z);
- glVertex3f(0, 0, z);
-
-
- glColor3f(0,1,0);
- glVertex3f(1, 1, z);
- glVertex3f(0, 1, z);
- glVertex3f(.5, .5, z);
-
- glColor3f(1,1,1);
- glVertex3f(0, 1, z);
- glVertex3f(-1, 1, z);
- glVertex3f(-.5, .5, z);
-
- glVertex3f(.5, .5, z);
- glVertex3f(-.5, .5, z);
- glVertex3f( 0, 0, z);
-
- glEnd();
-
-
- glViewport(0, 0, win_width, win_height);
-
- glBegin(GL_LINES);
- glColor3f(.5,.5,0);
- for (i = -10; i < 10; i++) {
- float f = i / 10.0;
-
- if (i == 0)
- continue;
-
- glVertex3f(-1, f, z);
- glVertex3f(1, f, z);
-
- glVertex3f(f, -1, z);
- glVertex3f(f, 1, z);
- }
- glEnd();
-
-
-
- glFlush();
-
- if (doubleBuffer) {
- glutSwapBuffers();
- }
-}
-
-static GLenum Args(int argc, char **argv)
-{
- GLint i;
-
- if (getenv("VPX"))
- tx = atof(getenv("VPX"));
-
- if (getenv("VPY"))
- ty = atof(getenv("VPY"));
-
-
- for (i = 1; i < argc; i++) {
- if (strcmp(argv[i], "-sb") == 0) {
- doubleBuffer = GL_FALSE;
- } else if (strcmp(argv[i], "-db") == 0) {
- doubleBuffer = GL_TRUE;
- } else {
- fprintf(stderr, "%s (Bad option).\n", argv[i]);
- return GL_FALSE;
- }
- }
- return GL_TRUE;
-}
-
-
-static void
-special(int k, int x, int y)
-{
- switch (k) {
- case GLUT_KEY_UP:
- ty += 1.0;
- break;
- case GLUT_KEY_DOWN:
- ty -= 1.0;
- break;
- case GLUT_KEY_LEFT:
- tx -= 1.0;
- break;
- case GLUT_KEY_RIGHT:
- tx += 1.0;
- break;
- default:
- break;
- }
- glutPostRedisplay();
-}
-
-
-int main(int argc, char **argv)
-{
- GLenum type;
-
- glutInit(&argc, argv);
-
- if (Args(argc, argv) == GL_FALSE) {
- exit(1);
- }
-
- glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
-
- type = GLUT_RGB | GLUT_ALPHA;
- type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
- glutInitDisplayMode(type);
-
- win = glutCreateWindow(*argv);
- if (!win) {
- exit(1);
- }
-
- Init();
-
- glutReshapeFunc(Reshape);
- glutKeyboardFunc(Key);
- glutSpecialFunc(special);
- glutDisplayFunc(Draw);
- glutMainLoop();
- return 0;
-}
projects / mesa.git / blobdiff