+++ /dev/null
-/*
- * Copyright © 2008 Intel Corporation
- *
- * 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 (including the next
- * paragraph) 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 OR COPYRIGHT HOLDERS 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.
- *
- * Authors:
- * Eric Anholt <eric@anholt.net>
- *
- */
-
-#include <stdlib.h>
-#include <GL/glew.h>
-#include <GL/glut.h>
-
-static int win_width, win_height;
-
-static void
-line(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2)
-{
- glBegin(GL_LINES);
- glVertex2f(x1, y1);
- glVertex2f(x2, y2);
- glEnd();
-}
-
-static void
-line3(GLfloat x1, GLfloat y1, GLfloat z1, GLfloat x2, GLfloat y2, GLfloat z2)
-{
- glBegin(GL_LINES);
- glVertex3f(x1, y1, z1);
- glVertex3f(x2, y2, z2);
- glEnd();
-}
-
-static void
-display(void)
-{
- glClearColor(0.0, 0.0, 0.0, 0.0);
- glClear(GL_COLOR_BUFFER_BIT);
-
- glColor3f(1.0, 0.0, 0.0);
- /* 2 lines clipped along xmin */
- line(-20, win_height / 2 - 20,
- 20, win_height / 2 - 20);
- line( 20, win_height / 2 + 20,
- -20, win_height / 2 + 20);
-
- glColor3f(0.0, 1.0, 0.0);
- /* 2 lines clipped along ymax */
- line(win_width / 2 - 20, win_height + 20,
- win_width / 2 - 20, win_height - 20);
- line(win_width / 2 + 20, win_height - 20,
- win_width / 2 + 20, win_height + 20);
-
- glColor3f(0.0, 0.0, 1.0);
- /* 2 lines clipped along xmax */
- line(win_width - 20, win_height / 2 - 20,
- win_width + 20, win_height / 2 - 20);
- line(win_width + 20, win_height / 2 + 20,
- win_width - 20, win_height / 2 + 20);
-
- glColor3f(1.0, 1.0, 1.0);
- /* 2 lines clipped along ymin */
- line(win_width / 2 - 20, 20,
- win_width / 2 - 20, -20);
- line(win_width / 2 + 20, -20,
- win_width / 2 + 20, 20);
-
- /* 2 lines clipped along near */
- glColor3f(1.0, 0.0, 1.0);
- line3(win_width / 2 - 20 - 20, win_height / 2, 0.5,
- win_width / 2 - 20 + 20, win_height / 2, -0.5);
- line3(win_width / 2 - 20, win_height / 2 - 20, -0.5,
- win_width / 2 - 20, win_height / 2 + 20, 0.5);
-
- /* 2 lines clipped along far */
- glColor3f(0.0, 1.0, 1.0);
- line3(win_width / 2 + 20 - 20, win_height / 2, 1.5,
- win_width / 2 + 20 + 20, win_height / 2, 0.5);
- line3(win_width / 2 + 20, win_height / 2 - 20, 0.5,
- win_width / 2 + 20, win_height / 2 + 20, 1.5);
-
- /* entirely clipped along near/far */
- glColor3f(.5, .5, .5);
- line3(win_width / 2, win_height / 2 - 20, -0.5,
- win_width / 2, win_height / 2 + 20, -0.5);
- glColor3f(.5, .5, .5);
- line3(win_width / 2, win_height / 2 - 20, 1.5,
- win_width / 2, win_height / 2 + 20, 1.5);
-
- glColor3f(1.0, 1.0, 0.0);
- /* lines clipped along both x and y limits */
- line(-5, 20,
- 20, -5); /* xmin, ymin */
- line(-5, win_height - 20,
- 20, win_height + 5); /* xmin, ymax */
- line(win_width - 20, -5,
- win_width + 5, 20); /* xmax, ymin */
- line(win_width - 20, win_height + 5,
- win_width + 5, win_height - 20); /* xmax, ymax */
-
- glutSwapBuffers();
-}
-
-static void
-reshape(int width, int height)
-{
- win_width = width;
- win_height = height;
- glViewport(0, 0, width, height);
-
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glOrtho(0, win_width, 0, win_height, 0.0, -1.0);
-
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- glTranslatef(.25, .25, 0);
-}
-
-static void key( unsigned char key, int x, int y )
-{
- (void) x;
- (void) y;
-
- switch (key) {
- case 27: /* esc */
- exit(0);
- break;
- }
-
- glutPostRedisplay();
-}
-
-static void
-init(void)
-{
-}
-
-int
-main(int argc, char *argv[])
-{
- win_width = 200;
- win_height = 200;
-
- glutInit(&argc, argv);
- glutInitWindowPosition(0, 0);
- glutInitWindowSize(win_width, win_height);
- glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
- glutCreateWindow(argv[0]);
- glewInit();
- glutReshapeFunc(reshape);
- glutKeyboardFunc(key);
- glutDisplayFunc(display);
-
- init();
-
- glutMainLoop();
- return 0;
-}
projects / mesa.git / blobdiff