diff options
Diffstat (limited to 'nx-X11/extras/Mesa_6.4.2/progs/samples/depth.c')
| -rw-r--r-- | nx-X11/extras/Mesa_6.4.2/progs/samples/depth.c | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/nx-X11/extras/Mesa_6.4.2/progs/samples/depth.c b/nx-X11/extras/Mesa_6.4.2/progs/samples/depth.c new file mode 100644 index 000000000..afe2ec17a --- /dev/null +++ b/nx-X11/extras/Mesa_6.4.2/progs/samples/depth.c @@ -0,0 +1,209 @@ +/* + * 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> + + +#define CI_OFFSET_1 16 +#define CI_OFFSET_2 32 + + +GLenum rgb, doubleBuffer; + +GLenum antiAlias, stipple; +GLubyte stippleBits[32*4] = { + 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, + 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, + 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, + 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, + 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, + 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, + 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, + 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, + 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, + 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, + 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, + 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, + 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, + 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, + 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, + 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, +}; + + +#include "tkmap.c" + +static void Init(void) +{ + GLint i; + + glClearColor(0.0, 0.0, 0.0, 0.0); + glClearIndex(0.0); + + if (!rgb) { + for (i = 0; i < 16; i++) { + glutSetColor(i+CI_OFFSET_1, 0.0, 0.0, i/15.0); + glutSetColor(i+CI_OFFSET_2, 0.0, i/15.0, 0.0); + } + } + + glPolygonStipple(stippleBits); + + antiAlias = GL_FALSE; + stipple = GL_FALSE; +} + +static void Reshape(int width, int height) +{ + + glViewport(0, 0, (GLint)width, (GLint)height); + + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0); + glMatrixMode(GL_MODELVIEW); +} + +static void Key(unsigned char key, int x, int y) +{ + + switch (key) { + case 27: + exit(1); + case '1': + antiAlias = !antiAlias; + break; + case '2': + stipple = !stipple; + break; + default: + return; + } + + glutPostRedisplay(); +} + +static void Draw(void) +{ + GLint ci1, ci2; + + glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); + + if (antiAlias) { + ci1 = CI_OFFSET_1; + ci2 = CI_OFFSET_2; + glBlendFunc(GL_SRC_ALPHA, GL_ONE); + glEnable(GL_BLEND); + glEnable(GL_POLYGON_SMOOTH); + glDisable(GL_DEPTH_TEST); + } else { + ci1 = COLOR_BLUE; + ci2 = COLOR_GREEN; + glDisable(GL_BLEND); + glDisable(GL_POLYGON_SMOOTH); + glEnable(GL_DEPTH_TEST); + } + + if (stipple) { + glEnable(GL_POLYGON_STIPPLE); + } else { + glDisable(GL_POLYGON_STIPPLE); + } + + glBegin(GL_TRIANGLES); + (rgb) ? glColor3fv(RGBMap[COLOR_BLUE]) : glIndexi(ci1); + glVertex3f( 0.9, -0.9, -30.0); + glVertex3f( 0.9, 0.9, -30.0); + glVertex3f(-0.9, 0.0, -30.0); + (rgb) ? glColor3fv(RGBMap[COLOR_GREEN]) : glIndexi(ci2); + glVertex3f(-0.9, -0.9, -40.0); + glVertex3f(-0.9, 0.9, -40.0); + glVertex3f( 0.9, 0.0, -25.0); + glEnd(); + + glFlush(); + + if (doubleBuffer) { + glutSwapBuffers(); + } +} + +static GLenum Args(int argc, char **argv) +{ + GLint i; + + rgb = GL_TRUE; + doubleBuffer = GL_FALSE; + + for (i = 1; i < argc; i++) { + if (strcmp(argv[i], "-ci") == 0) { + rgb = GL_FALSE; + } else if (strcmp(argv[i], "-rgb") == 0) { + rgb = GL_TRUE; + } else if (strcmp(argv[i], "-sb") == 0) { + doubleBuffer = GL_FALSE; + } else if (strcmp(argv[i], "-db") == 0) { + doubleBuffer = GL_TRUE; + } else { + printf("%s (Bad option).\n", argv[i]); + return GL_FALSE; + } + } + return GL_TRUE; +} + +int main(int argc, char **argv) +{ + GLenum type; + + glutInit(&argc, argv); + + if (Args(argc, argv) == GL_FALSE) { + exit(1); + } + + glutInitWindowPosition(0, 0); glutInitWindowSize( 300, 300); + + type = GLUT_DEPTH; + type |= (rgb) ? GLUT_RGB : GLUT_INDEX; + type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; + glutInitDisplayMode(type); + + if (glutCreateWindow("Depth Test") == GL_FALSE) { + exit(1); + } + + InitMap(); + + Init(); + + glutReshapeFunc(Reshape); + glutKeyboardFunc(Key); + glutDisplayFunc(Draw); + glutMainLoop(); + return 0; +} |