summaryrefslogtreecommitdiff
path: root/progs/samples/overlay.c
diff options
context:
space:
mode:
authorEric Anholt <eric@anholt.net>2010-05-21 09:32:38 -0700
committerEric Anholt <eric@anholt.net>2010-05-21 12:20:39 -0700
commit68fc4b415e322f6744299e39864fbc377c6eff74 (patch)
tree4bafffd8b0105174f3c5c0ae327a005be9145990 /progs/samples/overlay.c
parente4f4489e3fc0b36d72821b55794fb843b2b7fa5f (diff)
Remove demos that have moved to git+ssh://git.freedesktop.org/git/mesa/demos.
The remaining programs are ones I've had difficulty finding a build environment for to make the build system or are unit tests that should probably live next to their code instead. Hopefully people can bring over the build for remaining pieces they care about.
Diffstat (limited to 'progs/samples/overlay.c')
-rw-r--r--progs/samples/overlay.c378
1 files changed, 0 insertions, 378 deletions
diff --git a/progs/samples/overlay.c b/progs/samples/overlay.c
deleted file mode 100644
index 6087cef281..0000000000
--- a/progs/samples/overlay.c
+++ /dev/null
@@ -1,378 +0,0 @@
-/*
- * 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 <math.h>
-#include <time.h>
-#include <GL/glut.h>
-
-
-#ifndef PI
-#define PI 3.141592657
-#endif
-
-
-enum {
- NORMAL = 0,
- WEIRD = 1
-};
-
-enum {
- STREAK = 0,
- CIRCLE = 1
-};
-
-#define MAXSTARS 400
-#define MAXPOS 10000
-#define MAXWARP 10
-#define MAXANGLES 6000
-
-
-typedef struct _starRec {
- GLint type;
- float x[2], y[2], z[2];
- float offsetX, offsetY, offsetR, rotation;
-} starRec;
-
-
-GLenum doubleBuffer;
-GLint windW, windH;
-
-GLenum flag = NORMAL, overlayInit = GL_FALSE;
-GLint starCount = MAXSTARS / 2;
-float speed = 1.0;
-GLint nitro = 0;
-starRec stars[MAXSTARS];
-float sinTable[MAXANGLES];
-
-
-static float Sin(float angle)
-{
-
- return (sinTable[(GLint)angle]);
-}
-
-static float Cos(float angle)
-{
-
- return (sinTable[((GLint)angle+(MAXANGLES/4))%MAXANGLES]);
-}
-
-static void NewStar(GLint n, GLint d)
-{
-
- if (rand()%4 == 0) {
- stars[n].type = CIRCLE;
- } else {
- stars[n].type = STREAK;
- }
- stars[n].x[0] = (float)(rand() % MAXPOS - MAXPOS / 2);
- stars[n].y[0] = (float)(rand() % MAXPOS - MAXPOS / 2);
- stars[n].z[0] = (float)(rand() % MAXPOS + d);
- if (rand()%4 == 0 && flag == WEIRD) {
- stars[n].offsetX = (float)(rand() % 100 - 100 / 2);
- stars[n].offsetY = (float)(rand() % 100 - 100 / 2);
- stars[n].offsetR = (float)(rand() % 25 - 25 / 2);
- } else {
- stars[n].offsetX = 0.0;
- stars[n].offsetY = 0.0;
- stars[n].offsetR = 0.0;
- }
-}
-
-static void RotatePoint(float *x, float *y, float rotation)
-{
- float tmpX, tmpY;
-
- tmpX = *x * Cos(rotation) - *y * Sin(rotation);
- tmpY = *y * Cos(rotation) + *x * Sin(rotation);
- *x = tmpX;
- *y = tmpY;
-}
-
-static void MoveStars(void)
-{
- float offset;
- GLint n;
-
- offset = speed * 60.0;
-
- for (n = 0; n < starCount; n++) {
- stars[n].x[1] = stars[n].x[0];
- stars[n].y[1] = stars[n].y[0];
- stars[n].z[1] = stars[n].z[0];
- stars[n].x[0] += stars[n].offsetX;
- stars[n].y[0] += stars[n].offsetY;
- stars[n].z[0] -= offset;
- stars[n].rotation += stars[n].offsetR;
- if (stars[n].rotation > MAXANGLES) {
- stars[n].rotation = 0.0;
- }
- }
-}
-
-static GLenum StarPoint(GLint n)
-{
- float x0, y0, x1, y1, width;
- GLint i;
-
- x0 = stars[n].x[0] * windW / stars[n].z[0];
- y0 = stars[n].y[0] * windH / stars[n].z[0];
- RotatePoint(&x0, &y0, stars[n].rotation);
- x0 += windW / 2.0;
- y0 += windH / 2.0;
-
- if (x0 >= 0.0 && x0 < windW && y0 >= 0.0 && y0 < windH) {
- if (stars[n].type == STREAK) {
- x1 = stars[n].x[1] * windW / stars[n].z[1];
- y1 = stars[n].y[1] * windH / stars[n].z[1];
- RotatePoint(&x1, &y1, stars[n].rotation);
- x1 += windW / 2.0;
- y1 += windH / 2.0;
-
- glLineWidth(MAXPOS/100.0/stars[n].z[0]+1.0);
- glColor3f(1.0, (MAXWARP-speed)/MAXWARP, (MAXWARP-speed)/MAXWARP);
- if (fabs(x0-x1) < 1.0 && fabs(y0-y1) < 1.0) {
- glBegin(GL_POINTS);
- glVertex2f(x0, y0);
- glEnd();
- } else {
- glBegin(GL_LINES);
- glVertex2f(x0, y0);
- glVertex2f(x1, y1);
- glEnd();
- }
- } else {
- width = MAXPOS / 10.0 / stars[n].z[0] + 1.0;
- glColor3f(1.0, 0.0, 0.0);
- glBegin(GL_POLYGON);
- for (i = 0; i < 8; i++) {
- float x = x0 + width * Cos((float)i*MAXANGLES/8.0);
- float y = y0 + width * Sin((float)i*MAXANGLES/8.0);
- glVertex2f(x, y);
- };
- glEnd();
- }
- return GL_TRUE;
- } else {
- return GL_FALSE;
- }
-}
-
-static void ShowStars(void)
-{
- GLint n;
-
- glClear(GL_COLOR_BUFFER_BIT);
-
- for (n = 0; n < starCount; n++) {
- if (stars[n].z[0] > speed || (stars[n].z[0] > 0.0 && speed < MAXWARP)) {
- if (StarPoint(n) == GL_FALSE) {
- NewStar(n, MAXPOS);
- }
- } else {
- NewStar(n, MAXPOS);
- }
- }
-}
-
-static void Init(void)
-{
- float angle;
- GLint n;
-
- srand((unsigned int)time(NULL));
-
- for (n = 0; n < MAXSTARS; n++) {
- NewStar(n, 100);
- }
-
- angle = 0.0;
- for (n = 0; n < MAXANGLES ; n++) {
- sinTable[n] = sin(angle);
- angle += PI / (MAXANGLES / 2.0);
- }
-
- glClearColor(0.0, 0.0, 0.0, 0.0);
-
- glDisable(GL_DITHER);
-}
-
-static void Reshape(int width, int height)
-{
-
- windW = (GLint)width;
- windH = (GLint)height;
-
- glutUseLayer(GLUT_OVERLAY);
-
- glViewport(0, 0, windW, windH);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- gluOrtho2D(-0.5, windW+0.5, -0.5, windH+0.5);
- glMatrixMode(GL_MODELVIEW);
- overlayInit = GL_FALSE;
-
- glutUseLayer(GLUT_NORMAL);
-
- glViewport(0, 0, windW, windH);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- gluOrtho2D(-0.5, windW+0.5, -0.5, windH+0.5);
- glMatrixMode(GL_MODELVIEW);
-}
-
-static void Key(unsigned char key, int x, int y)
-{
-
- switch (key) {
- case 27:
- exit(1);
- case 32:
- flag = (flag == NORMAL) ? WEIRD : NORMAL;
- break;
- case 't':
- nitro = 1;
- break;
- default:
- return;
- }
-}
-
-static void Idle(void)
-{
-
- if (overlayInit == GL_FALSE) {
- glutUseLayer(GLUT_OVERLAY);
- glClear(GL_COLOR_BUFFER_BIT);
-/* glColor3f(1.0, 0.0, 0.0);*/
-
- glIndexf( 2.0 );
- glBegin(GL_POLYGON);
- glVertex2i(windW/4-10, windH/4-10);
- glVertex2i(windW/2-10, windH/4-10);
- glVertex2i(windW/2-10, windH/2-10);
- glVertex2i(windW/4-10, windH/2-10);
- glEnd();
-
- glIndexf( 0.0 );
- glBegin(GL_POLYGON);
- glVertex2i(windW/4, windH/4);
- glVertex2i(windW/2, windH/4);
- glVertex2i(windW/2, windH/2);
- glVertex2i(windW/4, windH/2);
- glEnd();
-
- glIndexf( 1.0 );
- glBegin(GL_POLYGON);
- glVertex2i(windW/4+10, windH/4+10);
- glVertex2i(windW/2+10, windH/4+10);
- glVertex2i(windW/2+10, windH/2+10);
- glVertex2i(windW/4+10, windH/2+10);
- glEnd();
-
- glutUseLayer(GLUT_NORMAL);
- overlayInit = GL_TRUE;
- }
-
- MoveStars();
- ShowStars();
- if (nitro > 0) {
- speed = (float)(nitro / 10) + 1.0;
- if (speed > MAXWARP) {
- speed = MAXWARP;
- }
- if (++nitro > MAXWARP*10) {
- nitro = -nitro;
- }
- } else if (nitro < 0) {
- nitro++;
- speed = (float)(-nitro / 10) + 1.0;
- if (speed > MAXWARP) {
- speed = MAXWARP;
- }
- }
-
- glFlush();
- if (doubleBuffer) {
- glutSwapBuffers();
- }
-}
-
-static GLenum Args(int argc, char **argv)
-{
- GLint i;
-
- doubleBuffer = GL_TRUE;
-
- 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;
- }
- }
- return GL_TRUE;
-}
-
-int main(int argc, char **argv)
-{
- GLenum type;
-
- glutInit(&argc, argv);
-
- if (!glutLayerGet(GLUT_OVERLAY_POSSIBLE))
- {
- fprintf(stderr, "Overlay not available\n");
- return(1);
- }
-
- if (Args(argc, argv) == GL_FALSE) {
- return(1);
- }
-
- windW = 300;
- windH = 300;
- glutInitWindowPosition(0, 0); glutInitWindowSize( 300, 300);
-
- type = GLUT_RGB;
- type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
- glutInitDisplayMode(type);
-
- if (glutCreateWindow("Overlay Test") == GL_FALSE) {
- return(1);
- }
-
- glutEstablishOverlay();
-
- Init();
-
- glutReshapeFunc(Reshape);
- glutKeyboardFunc(Key);
- glutIdleFunc(Idle);
- glutMainLoop();
- return 0;
-}