summaryrefslogtreecommitdiff
path: root/progs/osdemos/osdemo.c
diff options
context:
space:
mode:
Diffstat (limited to 'progs/osdemos/osdemo.c')
-rw-r--r--progs/osdemos/osdemo.c323
1 files changed, 0 insertions, 323 deletions
diff --git a/progs/osdemos/osdemo.c b/progs/osdemos/osdemo.c
deleted file mode 100644
index bc0168fb97..0000000000
--- a/progs/osdemos/osdemo.c
+++ /dev/null
@@ -1,323 +0,0 @@
-/*
- * Demo of off-screen Mesa rendering
- *
- * See Mesa/include/GL/osmesa.h for documentation of the OSMesa functions.
- *
- * If you want to render BIG images you'll probably have to increase
- * MAX_WIDTH and MAX_Height in src/config.h.
- *
- * This program is in the public domain.
- *
- * Brian Paul
- *
- * PPM output provided by Joerg Schmalzl.
- * ASCII PPM output added by Brian Paul.
- *
- * Usage: osdemo [filename]
- */
-
-
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "GL/osmesa.h"
-#include "GL/glu.h"
-
-
-#define SAVE_TARGA
-
-static int Width = 400;
-static int Height = 400;
-
-
-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 };
- GLfloat light_specular[] = { 1.0, 1.0, 1.0, 1.0 };
- GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };
- GLfloat red_mat[] = { 1.0, 0.2, 0.2, 1.0 };
- GLfloat green_mat[] = { 0.2, 1.0, 0.2, 1.0 };
- GLfloat blue_mat[] = { 0.2, 0.2, 1.0, 1.0 };
-
-
- glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
- glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
- glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
- glLightfv(GL_LIGHT0, GL_POSITION, light_position);
-
- glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
- glEnable(GL_DEPTH_TEST);
-
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glOrtho(-2.5, 2.5, -2.5, 2.5, -10.0, 10.0);
- glMatrixMode(GL_MODELVIEW);
-
- glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
-
- glPushMatrix();
- glRotatef(20.0, 1.0, 0.0, 0.0);
-
- glPushMatrix();
- 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 );
- 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 );
- 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 );
- Sphere(1.0, 20, 20);
- glPopMatrix();
-
- glPopMatrix();
-
- /* This is very important!!!
- * Make sure buffered commands are finished!!!
- */
- glFinish();
-}
-
-
-#ifdef SAVE_TARGA
-
-static void
-write_targa(const char *filename, const GLubyte *buffer, int width, int height)
-{
- FILE *f = fopen( filename, "w" );
- if (f) {
- int i, x, y;
- const GLubyte *ptr = buffer;
- printf ("osdemo, writing tga file \n");
- fputc (0x00, f); /* ID Length, 0 => No ID */
- fputc (0x00, f); /* Color Map Type, 0 => No color map included */
- fputc (0x02, f); /* Image Type, 2 => Uncompressed, True-color Image */
- fputc (0x00, f); /* Next five bytes are about the color map entries */
- fputc (0x00, f); /* 2 bytes Index, 2 bytes length, 1 byte size */
- fputc (0x00, f);
- fputc (0x00, f);
- fputc (0x00, f);
- fputc (0x00, f); /* X-origin of Image */
- fputc (0x00, f);
- fputc (0x00, f); /* Y-origin of Image */
- fputc (0x00, f);
- fputc (Width & 0xff, f); /* Image Width */
- fputc ((Width>>8) & 0xff, f);
- fputc (Height & 0xff, f); /* Image Height */
- fputc ((Height>>8) & 0xff, f);
- fputc (0x18, f); /* Pixel Depth, 0x18 => 24 Bits */
- fputc (0x20, f); /* Image Descriptor */
- fclose(f);
- f = fopen( filename, "ab" ); /* reopen in binary append mode */
- for (y=height-1; y>=0; y--) {
- for (x=0; x<width; x++) {
- i = (y*width + x) * 4;
- fputc(ptr[i+2], f); /* write blue */
- fputc(ptr[i+1], f); /* write green */
- fputc(ptr[i], f); /* write red */
- }
- }
- }
-}
-
-#else
-
-static void
-write_ppm(const char *filename, const GLubyte *buffer, int width, int height)
-{
- const int binary = 0;
- FILE *f = fopen( filename, "w" );
- if (f) {
- int i, x, y;
- const GLubyte *ptr = buffer;
- if (binary) {
- fprintf(f,"P6\n");
- fprintf(f,"# ppm-file created by osdemo.c\n");
- fprintf(f,"%i %i\n", width,height);
- fprintf(f,"255\n");
- fclose(f);
- f = fopen( filename, "ab" ); /* reopen in binary append mode */
- for (y=height-1; y>=0; y--) {
- for (x=0; x<width; x++) {
- i = (y*width + x) * 4;
- fputc(ptr[i], f); /* write red */
- fputc(ptr[i+1], f); /* write green */
- fputc(ptr[i+2], f); /* write blue */
- }
- }
- }
- else {
- /*ASCII*/
- int counter = 0;
- fprintf(f,"P3\n");
- fprintf(f,"# ascii ppm file created by osdemo.c\n");
- fprintf(f,"%i %i\n", width, height);
- fprintf(f,"255\n");
- for (y=height-1; y>=0; y--) {
- for (x=0; x<width; x++) {
- i = (y*width + x) * 4;
- fprintf(f, " %3d %3d %3d", ptr[i], ptr[i+1], ptr[i+2]);
- counter++;
- if (counter % 5 == 0)
- fprintf(f, "\n");
- }
- }
- }
- fclose(f);
- }
-}
-
-#endif
-
-
-
-int
-main(int argc, char *argv[])
-{
- OSMesaContext ctx;
- void *buffer;
- char *filename = NULL;
-
- if (argc < 2) {
- fprintf(stderr, "Usage:\n");
- fprintf(stderr, " osdemo filename [width height]\n");
- return 0;
- }
-
- filename = argv[1];
- if (argc == 4) {
- Width = atoi(argv[2]);
- Height = atoi(argv[3]);
- }
-
- /* Create an RGBA-mode context */
-#if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305
- /* specify Z, stencil, accum sizes */
- ctx = OSMesaCreateContextExt( OSMESA_RGBA, 16, 0, 0, NULL );
-#else
- ctx = OSMesaCreateContext( OSMESA_RGBA, NULL );
-#endif
- if (!ctx) {
- printf("OSMesaCreateContext failed!\n");
- return 0;
- }
-
- /* Allocate the image buffer */
- buffer = malloc( Width * Height * 4 * sizeof(GLubyte) );
- if (!buffer) {
- printf("Alloc image buffer failed!\n");
- return 0;
- }
-
- /* Bind the buffer to the context and make it current */
- if (!OSMesaMakeCurrent( ctx, buffer, GL_UNSIGNED_BYTE, Width, Height )) {
- printf("OSMesaMakeCurrent failed!\n");
- return 0;
- }
-
-
- {
- int z, s, a;
- glGetIntegerv(GL_DEPTH_BITS, &z);
- glGetIntegerv(GL_STENCIL_BITS, &s);
- glGetIntegerv(GL_ACCUM_RED_BITS, &a);
- printf("Depth=%d Stencil=%d Accum=%d\n", z, s, a);
- }
-
- render_image();
-
- if (filename != NULL) {
-#ifdef SAVE_TARGA
- write_targa(filename, buffer, Width, Height);
-#else
- write_ppm(filename, buffer, Width, Height);
-#endif
- }
- else {
- printf("Specify a filename if you want to make an image file\n");
- }
-
- printf("all done\n");
-
- /* free the image buffer */
- free( buffer );
-
- /* destroy the context */
- OSMesaDestroyContext( ctx );
-
- return 0;
-}
generated by cgit v1.2.3 (git 2.51.0) at 2025-12-13 11:59:45 +0000