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-rw-r--r--progs/osdemos/osdemo.c108
1 files changed, 75 insertions, 33 deletions
diff --git a/progs/osdemos/osdemo.c b/progs/osdemos/osdemo.c
index 95e2ff9787..f7ce121f70 100644
--- a/progs/osdemos/osdemo.c
+++ b/progs/osdemos/osdemo.c
@@ -1,4 +1,3 @@
-
/*
* Demo of off-screen Mesa rendering
*
@@ -14,31 +13,88 @@
* PPM output provided by Joerg Schmalzl.
* ASCII PPM output added by Brian Paul.
*
- * Usage: osdemo [-perf] [filename]
- *
- * -perf: Redraws the image 1000 times, displaying the FPS every 5 secs.
- * filename: file to store the TGA or PPM output
+ * Usage: osdemo [filename]
*/
+#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "GL/osmesa.h"
-#include "GL/glut.h"
+#include "GL/glu.h"
#define SAVE_TARGA
-
#define WIDTH 400
#define HEIGHT 400
-static GLint T0 = 0;
-static GLint Frames = 0;
-static int perf = 0;
-static void render_image( void )
+static void
+Sphere(float radius, int slices, int stacks)
+{
+ GLUquadric *q = gluNewQuadric();
+ gluQuadricNormals(q, GLU_SMOOTH);
+ gluSphere(q, radius, slices, stacks);
+ gluDeleteQuadric(q);
+}
+
+
+static void
+Cone(float base, float height, int slices, int stacks)
+{
+ GLUquadric *q = gluNewQuadric();
+ gluQuadricDrawStyle(q, GLU_FILL);
+ gluQuadricNormals(q, GLU_SMOOTH);
+ gluCylinder(q, base, 0.0, height, slices, stacks);
+ gluDeleteQuadric(q);
+}
+
+
+static void
+Torus(float innerRadius, float outerRadius, int sides, int rings)
+{
+ /* from GLUT... */
+ int i, j;
+ GLfloat theta, phi, theta1;
+ GLfloat cosTheta, sinTheta;
+ GLfloat cosTheta1, sinTheta1;
+ const GLfloat ringDelta = 2.0 * M_PI / rings;
+ const GLfloat sideDelta = 2.0 * M_PI / sides;
+
+ theta = 0.0;
+ cosTheta = 1.0;
+ sinTheta = 0.0;
+ for (i = rings - 1; i >= 0; i--) {
+ theta1 = theta + ringDelta;
+ cosTheta1 = cos(theta1);
+ sinTheta1 = sin(theta1);
+ glBegin(GL_QUAD_STRIP);
+ phi = 0.0;
+ for (j = sides; j >= 0; j--) {
+ GLfloat cosPhi, sinPhi, dist;
+
+ phi += sideDelta;
+ cosPhi = cos(phi);
+ sinPhi = sin(phi);
+ dist = outerRadius + innerRadius * cosPhi;
+
+ glNormal3f(cosTheta1 * cosPhi, -sinTheta1 * cosPhi, sinPhi);
+ glVertex3f(cosTheta1 * dist, -sinTheta1 * dist, innerRadius * sinPhi);
+ glNormal3f(cosTheta * cosPhi, -sinTheta * cosPhi, sinPhi);
+ glVertex3f(cosTheta * dist, -sinTheta * dist, innerRadius * sinPhi);
+ }
+ glEnd();
+ theta = theta1;
+ cosTheta = cosTheta1;
+ sinTheta = sinTheta1;
+ }
+}
+
+
+static void
+render_image(void)
{
GLfloat light_ambient[] = { 0.0, 0.0, 0.0, 1.0 };
GLfloat light_diffuse[] = { 1.0, 1.0, 1.0, 1.0 };
@@ -72,20 +128,20 @@ static void render_image( void )
glTranslatef(-0.75, 0.5, 0.0);
glRotatef(90.0, 1.0, 0.0, 0.0);
glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, red_mat );
- glutSolidTorus(0.275, 0.85, 20, 20);
+ Torus(0.275, 0.85, 20, 20);
glPopMatrix();
glPushMatrix();
glTranslatef(-0.75, -0.5, 0.0);
glRotatef(270.0, 1.0, 0.0, 0.0);
glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, green_mat );
- glutSolidCone(1.0, 2.0, 16, 1);
+ Cone(1.0, 2.0, 16, 1);
glPopMatrix();
glPushMatrix();
glTranslatef(0.75, 0.0, -1.0);
glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue_mat );
- glutSolidSphere(1.0, 20, 20);
+ Sphere(1.0, 20, 20);
glPopMatrix();
glPopMatrix();
@@ -94,18 +150,6 @@ static void render_image( void )
* Make sure buffered commands are finished!!!
*/
glFinish();
-
- Frames++;
- if (perf) {
- GLint t = glutGet(GLUT_ELAPSED_TIME);
- if (t - T0 >= 5000) {
- GLfloat seconds = (t - T0) / 1000.0;
- GLfloat fps = Frames / seconds;
- printf("%d frames in %6.3f seconds = %6.3f FPS\n", Frames, seconds, fps);
- T0 = t;
- Frames = 0;
- }
- }
}
@@ -201,7 +245,8 @@ write_ppm(const char *filename, const GLubyte *buffer, int width, int height)
-int main( int argc, char *argv[] )
+int
+main(int argc, char *argv[])
{
void *buffer;
int i;
@@ -219,9 +264,9 @@ int main( int argc, char *argv[] )
return 0;
}
- for ( i=1; i<argc; i++ ) {
- if (argv[i][0] != '-') filename = argv[i];
- if (strcmp(argv[i], "-perf")==0) perf = 1;
+ for (i = 1; i < argc; i++) {
+ if (argv[i][0] != '-')
+ filename = argv[i];
}
/* Allocate the image buffer */
@@ -247,9 +292,6 @@ int main( int argc, char *argv[] )
}
render_image();
- if (perf)
- for(i=0; i< 1000; i++)
- render_image();
if (filename != NULL) {
#ifdef SAVE_TARGA