diff options
Diffstat (limited to 'progs/osdemos/osdemo32.c')
-rw-r--r-- | progs/osdemos/osdemo32.c | 308 |
1 files changed, 0 insertions, 308 deletions
diff --git a/progs/osdemos/osdemo32.c b/progs/osdemos/osdemo32.c deleted file mode 100644 index 7295b46a83..0000000000 --- a/progs/osdemos/osdemo32.c +++ /dev/null @@ -1,308 +0,0 @@ -/* - * Demo of off-screen Mesa rendering with 32-bit float color channels. - * This requires the libOSMesa32.so library. - * - * Compile with something like this: - * - * gcc osdemo32.c -I../../include -L../../lib -lglut -lGLU -lOSMesa32 -lm -o osdemo32 - */ - - -#include <stdio.h> -#include <stdlib.h> -#include "GL/osmesa.h" -#include "GL/glut.h" - - -#define SAVE_TARGA - - -#define WIDTH 400 -#define HEIGHT 400 - - - -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, 0.5 }; - GLfloat blue_mat[] = { 0.2, 0.2, 1.0, 1.0 }; - GLfloat white_mat[] = { 1.0, 1.0, 1.0, 1.0 }; - GLfloat purple_mat[] = { 1.0, 0.2, 1.0, 1.0 }; - GLUquadricObj *qobj = gluNewQuadric(); - - 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); - -#if 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 ); - glutSolidTorus(0.275, 0.85, 20, 20); - glPopMatrix(); -#endif - - /* red square */ - glPushMatrix(); - glTranslatef(0.0, -0.5, 0.0); - glRotatef(90, 1, 0.5, 0); - glScalef(3, 3, 3); - glDisable(GL_LIGHTING); - glColor4f(1, 0, 0, 0.5); - glBegin(GL_POLYGON); - glVertex2f(-1, -1); - glVertex2f( 1, -1); - glVertex2f( 1, 1); - glVertex2f(-1, 1); - glEnd(); - glEnable(GL_LIGHTING); - glPopMatrix(); - -#if 0 - /* green square */ - glPushMatrix(); - glTranslatef(0.0, 0.5, 0.1); - glDisable(GL_LIGHTING); - glColor3f(0, 1, 0); - glBegin(GL_POLYGON); - glVertex2f(-1, -1); - glVertex2f( 1, -1); - glVertex2f( 1, 1); - glVertex2f(-1, 1); - glEnd(); - glEnable(GL_LIGHTING); - glPopMatrix(); - - /* blue square */ - glPushMatrix(); - glTranslatef(0.75, 0.5, 0.3); - glDisable(GL_LIGHTING); - glColor3f(0, 0, 0.5); - glBegin(GL_POLYGON); - glVertex2f(-1, -1); - glVertex2f( 1, -1); - glVertex2f( 1, 1); - glVertex2f(-1, 1); - glEnd(); - glEnable(GL_LIGHTING); - glPopMatrix(); -#endif - 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 ); - glColor4f(0,1,0,0.5); - glEnable(GL_BLEND); - glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); - gluCylinder(qobj, 1.0, 0.0, 2.0, 16, 1); - glDisable(GL_BLEND); - glPopMatrix(); - - glPushMatrix(); - glTranslatef(0.75, 1.0, 1.0); - glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue_mat ); - gluSphere(qobj, 1.0, 20, 20); - glPopMatrix(); - - glPopMatrix(); - - /* This is very important!!! - * Make sure buffered commands are finished!!! - */ - glFinish(); - - gluDeleteQuadric(qobj); - - { - GLint r, g, b, a; - glGetIntegerv(GL_RED_BITS, &r); - glGetIntegerv(GL_GREEN_BITS, &g); - glGetIntegerv(GL_BLUE_BITS, &b); - glGetIntegerv(GL_ALPHA_BITS, &a); - printf("channel sizes: %d %d %d %d\n", r, g, b, a); - } -} - - - -static void -write_targa(const char *filename, const GLfloat *buffer, int width, int height) -{ - FILE *f = fopen( filename, "w" ); - if (f) { - int i, x, y; - const GLfloat *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++) { - int r, g, b; - i = (y*width + x) * 4; - r = (int) (ptr[i+0] * 255.0); - g = (int) (ptr[i+1] * 255.0); - b = (int) (ptr[i+2] * 255.0); - if (r > 255) r = 255; - if (g > 255) g = 255; - if (b > 255) b = 255; - fputc(b, f); /* write blue */ - fputc(g, f); /* write green */ - fputc(r, f); /* write red */ - } - } - } -} - - -static void -write_ppm(const char *filename, const GLfloat *buffer, int width, int height) -{ - const int binary = 0; - FILE *f = fopen( filename, "w" ); - if (f) { - int i, x, y; - const GLfloat *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++) { - int r, g, b; - i = (y*width + x) * 4; - r = (int) (ptr[i+0] * 255.0); - g = (int) (ptr[i+1] * 255.0); - b = (int) (ptr[i+2] * 255.0); - if (r > 255) r = 255; - if (g > 255) g = 255; - if (b > 255) b = 255; - fputc(r, f); /* write red */ - fputc(g, f); /* write green */ - fputc(b, 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++) { - int r, g, b; - i = (y*width + x) * 4; - r = (int) (ptr[i+0] * 255.0); - g = (int) (ptr[i+1] * 255.0); - b = (int) (ptr[i+2] * 255.0); - if (r > 255) r = 255; - if (g > 255) g = 255; - if (b > 255) b = 255; - fprintf(f, " %3d %3d %3d", r, g, b); - counter++; - if (counter % 5 == 0) - fprintf(f, "\n"); - } - } - } - fclose(f); - } -} - - - -int main( int argc, char *argv[] ) -{ - GLfloat *buffer; - - /* Create an RGBA-mode context */ -#if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305 - /* specify Z, stencil, accum sizes */ - OSMesaContext ctx = OSMesaCreateContextExt( GL_RGBA, 16, 0, 0, NULL ); -#else - OSMesaContext ctx = OSMesaCreateContext( GL_RGBA, NULL ); -#endif - if (!ctx) { - printf("OSMesaCreateContext failed!\n"); - return 0; - } - - /* Allocate the image buffer */ - buffer = (GLfloat *) malloc( WIDTH * HEIGHT * 4 * sizeof(GLfloat)); - 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_FLOAT, WIDTH, HEIGHT )) { - printf("OSMesaMakeCurrent failed!\n"); - return 0; - } - - render_image(); - - if (argc>1) { -#ifdef SAVE_TARGA - write_targa(argv[1], buffer, WIDTH, HEIGHT); -#else - write_ppm(argv[1], 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; -} |