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Diffstat (limited to 'progs/osdemos/osdemo.c')
-rw-r--r-- | progs/osdemos/osdemo.c | 323 |
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; -} |