diff options
Diffstat (limited to 'progs/osdemos/ostest1.c')
| -rw-r--r-- | progs/osdemos/ostest1.c | 482 |
1 files changed, 0 insertions, 482 deletions
diff --git a/progs/osdemos/ostest1.c b/progs/osdemos/ostest1.c deleted file mode 100644 index 5a00fdb246..0000000000 --- a/progs/osdemos/ostest1.c +++ /dev/null @@ -1,482 +0,0 @@ -/* - * Test OSMesa interface at 8, 16 and 32 bits/channel. - * - * Usage: osdemo [options] - * - * Options: - * -f generate image files - * -g render gradient and print color values - */ - -#include <assert.h> -#include <math.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include "GL/osmesa.h" -#include "GL/glu.h" - - -#define WIDTH 600 -#define HEIGHT 600 - -static GLboolean WriteFiles = GL_FALSE; -static GLboolean Gradient = GL_FALSE; - - -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 Cube(float size) -{ - size = 0.5 * size; - - glBegin(GL_QUADS); - /* +X face */ - glNormal3f(1, 0, 0); - glVertex3f(size, -size, size); - glVertex3f(size, -size, -size); - glVertex3f(size, size, -size); - glVertex3f(size, size, size); - - /* -X face */ - glNormal3f(-1, 0, 0); - glVertex3f(-size, size, size); - glVertex3f(-size, size, -size); - glVertex3f(-size, -size, -size); - glVertex3f(-size, -size, size); - - /* +Y face */ - glNormal3f(0, 1, 0); - glVertex3f(-size, size, size); - glVertex3f( size, size, size); - glVertex3f( size, size, -size); - glVertex3f(-size, size, -size); - - /* -Y face */ - glNormal3f(0, -1, 0); - glVertex3f(-size, -size, -size); - glVertex3f( size, -size, -size); - glVertex3f( size, -size, size); - glVertex3f(-size, -size, size); - - /* +Z face */ - glNormal3f(0, 0, 1); - glVertex3f(-size, -size, size); - glVertex3f( size, -size, size); - glVertex3f( size, size, size); - glVertex3f(-size, size, size); - - /* -Z face */ - glNormal3f(0, 0, -1); - glVertex3f(-size, size, -size); - glVertex3f( size, size, -size); - glVertex3f( size, -size, -size); - glVertex3f(-size, -size, -size); - - glEnd(); -} - - - -/** - * Draw red/green gradient across bottom of image. - * Read pixels to check deltas. - */ -static void -render_gradient(void) -{ - GLfloat row[WIDTH][4]; - int i; - - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - glOrtho(-1, 1, -1, 1, -1, 1); - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); - - glBegin(GL_POLYGON); - glColor3f(1, 0, 0); - glVertex2f(-1, -1.0); - glVertex2f(-1, -0.9); - glColor3f(0, 1, 0); - glVertex2f(1, -0.9); - glVertex2f(1, -1.0); - glEnd(); - glFinish(); - - glReadPixels(0, 0, WIDTH, 1, GL_RGBA, GL_FLOAT, row); - for (i = 0; i < 4; i++) { - printf("row[i] = %f, %f, %f\n", row[i][0], row[i][1], row[i][2]); - } -} - - -static void -render_image(void) -{ - static const GLfloat light_ambient[4] = { 0.0, 0.0, 0.0, 1.0 }; - static const GLfloat light_diffuse[4] = { 1.0, 1.0, 1.0, 1.0 }; - static const GLfloat light_specular[4] = { 1.0, 1.0, 1.0, 1.0 }; - static const GLfloat light_position[4] = { 1.0, 1.0, 1.0, 0.0 }; - static const GLfloat red_mat[4] = { 1.0, 0.2, 0.2, 1.0 }; - static const GLfloat green_mat[4] = { 0.2, 1.0, 0.2, 1.0 }; - static const GLfloat blue_mat[4] = { 0.2, 0.2, 1.0, 1.0 }; -#if 0 - static const GLfloat yellow_mat[4] = { 0.8, 0.8, 0.0, 1.0 }; -#endif - static const GLfloat purple_mat[4] = { 0.8, 0.4, 0.8, 0.6 }; - - 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_DEPTH_TEST); - glEnable(GL_LIGHT0); - - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - glFrustum(-1.0, 1.0, -1.0, 1.0, 2.0, 50.0); - glMatrixMode(GL_MODELVIEW); - glTranslatef(0, 0.5, -7); - - glClearColor(0.3, 0.3, 0.7, 0.0); - glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); - - glPushMatrix(); - glRotatef(20.0, 1.0, 0.0, 0.0); - - /* ground */ - glEnable(GL_TEXTURE_2D); - glBegin(GL_POLYGON); - glNormal3f(0, 1, 0); - glTexCoord2f(0, 0); glVertex3f(-5, -1, -5); - glTexCoord2f(1, 0); glVertex3f( 5, -1, -5); - glTexCoord2f(1, 1); glVertex3f( 5, -1, 5); - glTexCoord2f(0, 1); glVertex3f(-5, -1, 5); - glEnd(); - glDisable(GL_TEXTURE_2D); - - glEnable(GL_LIGHTING); - - glPushMatrix(); - glTranslatef(-1.5, 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(-1.5, -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(0.95, 0.0, -0.8); - glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue_mat ); - glLineWidth(2.0); - glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); - Sphere(1.2, 20, 20); - glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); - glPopMatrix(); - -#if 0 - glPushMatrix(); - glTranslatef(0.75, 0.0, 1.3); - glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, yellow_mat ); - glutWireTeapot(1.0); - glPopMatrix(); -#endif - - glPushMatrix(); - glTranslatef(-0.25, 0.0, 2.5); - glRotatef(40, 0, 1, 0); - glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); - glEnable(GL_BLEND); - glEnable(GL_CULL_FACE); - glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, purple_mat ); - Cube(1.0); - glDisable(GL_BLEND); - glDisable(GL_CULL_FACE); - glPopMatrix(); - - glDisable(GL_LIGHTING); - - glPopMatrix(); - - glDisable(GL_DEPTH_TEST); -} - - -static void -init_context(void) -{ - const GLint texWidth = 64, texHeight = 64; - GLubyte *texImage; - int i, j; - - /* checker image */ - texImage = malloc(texWidth * texHeight * 4); - for (i = 0; i < texHeight; i++) { - for (j = 0; j < texWidth; j++) { - int k = (i * texWidth + j) * 4; - if ((i % 5) == 0 || (j % 5) == 0) { - texImage[k+0] = 200; - texImage[k+1] = 200; - texImage[k+2] = 200; - texImage[k+3] = 255; - } - else { - if ((i % 5) == 1 || (j % 5) == 1) { - texImage[k+0] = 50; - texImage[k+1] = 50; - texImage[k+2] = 50; - texImage[k+3] = 255; - } - else { - texImage[k+0] = 100; - texImage[k+1] = 100; - texImage[k+2] = 100; - texImage[k+3] = 255; - } - } - } - } - - glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, texWidth, texHeight, 0, - GL_RGBA, GL_UNSIGNED_BYTE, texImage); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - - free(texImage); -} - - -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); - } -} - - -static GLboolean -test(GLenum type, GLint bits, const char *filename) -{ - const GLint z = 16, stencil = 0, accum = 0; - OSMesaContext ctx; - void *buffer; - GLint cBits; - - assert(bits == 8 || - bits == 16 || - bits == 32); - - assert(type == GL_UNSIGNED_BYTE || - type == GL_UNSIGNED_SHORT || - type == GL_FLOAT); - - ctx = OSMesaCreateContextExt(OSMESA_RGBA, z, stencil, accum, NULL ); - if (!ctx) { - printf("OSMesaCreateContextExt() failed!\n"); - return 0; - } - - /* Allocate the image buffer */ - buffer = malloc(WIDTH * HEIGHT * 4 * bits / 8); - if (!buffer) { - printf("Alloc image buffer failed!\n"); - return 0; - } - - /* Bind the buffer to the context and make it current */ - if (!OSMesaMakeCurrent( ctx, buffer, type, WIDTH, HEIGHT )) { - printf("OSMesaMakeCurrent (%d bits/channel) failed!\n", bits); - free(buffer); - OSMesaDestroyContext(ctx); - return 0; - } - - /* sanity checks */ - glGetIntegerv(GL_RED_BITS, &cBits); - if (cBits != bits) { - fprintf(stderr, "Unable to create %d-bit/channel renderbuffer.\n", bits); - fprintf(stderr, "May need to recompile Mesa with CHAN_BITS=16 or 32.\n"); - return 0; - } - glGetIntegerv(GL_GREEN_BITS, &cBits); - assert(cBits == bits); - glGetIntegerv(GL_BLUE_BITS, &cBits); - assert(cBits == bits); - glGetIntegerv(GL_ALPHA_BITS, &cBits); - assert(cBits == bits); - - if (WriteFiles) - printf("Rendering %d bit/channel image: %s\n", bits, filename); - else - printf("Rendering %d bit/channel image\n", bits); - - OSMesaColorClamp(GL_TRUE); - - init_context(); - render_image(); - if (Gradient) - render_gradient(); - - /* Make sure buffered commands are finished! */ - glFinish(); - - - if (WriteFiles && filename != NULL) { - if (type == GL_UNSIGNED_SHORT) { - GLushort *buffer16 = (GLushort *) buffer; - GLubyte *buffer8 = (GLubyte *) malloc(WIDTH * HEIGHT * 4); - int i; - for (i = 0; i < WIDTH * HEIGHT * 4; i++) - buffer8[i] = buffer16[i] >> 8; - write_ppm(filename, buffer8, WIDTH, HEIGHT); - free(buffer8); - } - else if (type == GL_FLOAT) { - GLfloat *buffer32 = (GLfloat *) buffer; - GLubyte *buffer8 = (GLubyte *) malloc(WIDTH * HEIGHT * 4); - int i; - /* colors may be outside [0,1] so we need to clamp */ - for (i = 0; i < WIDTH * HEIGHT * 4; i++) - buffer8[i] = (GLubyte) (buffer32[i] * 255.0); - write_ppm(filename, buffer8, WIDTH, HEIGHT); - free(buffer8); - } - else { - write_ppm(filename, buffer, WIDTH, HEIGHT); - } - } - - OSMesaDestroyContext(ctx); - - free(buffer); - - return 1; -} - - -int -main( int argc, char *argv[] ) -{ - int i; - - printf("Use -f to write image files\n"); - - for (i = 1; i < argc; i++) { - if (strcmp(argv[i], "-f") == 0) - WriteFiles = GL_TRUE; - else if (strcmp(argv[i], "-g") == 0) - Gradient = GL_TRUE; - } - - test(GL_UNSIGNED_BYTE, 8, "image8.ppm"); - test(GL_UNSIGNED_SHORT, 16, "image16.ppm"); - test(GL_FLOAT, 32, "image32.ppm"); - - return 0; -} |