remove dependency on GLUT
This commit is contained in:
Brian Paul
parent
218ba1ff54
commit
3ae1905744
|
|
@ -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
|
||||
|
|
|
|||
Loading…
Reference in New Issue