clray

annotate src/clray.cc @ 39:980bc07be868

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Implemented OpenGL/OpenCL interop, and removed the texture copy
author John Tsiombikas <nuclear@member.fsf.org>
date Fri, 27 Aug 2010 18:30:09 +0100
parents a218551293ad
children 1bcbb53b3505
rev   line source
nuclear@0 1 #include <stdio.h>
nuclear@3 2 #include <stdlib.h>
nuclear@2 3 #include <string.h>
nuclear@27 4 #include <ctype.h>
nuclear@2 5 #include <errno.h>
nuclear@3 6 #ifndef __APPLE__
nuclear@3 7 #include <GL/glut.h>
nuclear@3 8 #else
nuclear@3 9 #include <GLUT/glut.h>
nuclear@3 10 #endif
nuclear@3 11 #include "rt.h"
nuclear@12 12 #include "matrix.h"
nuclear@22 13 #include "scene.h"
nuclear@39 14 #include "ocl.h"
nuclear@0 15
nuclear@3 16 void cleanup();
nuclear@3 17 void disp();
nuclear@3 18 void reshape(int x, int y);
nuclear@3 19 void keyb(unsigned char key, int x, int y);
nuclear@3 20 void mouse(int bn, int status, int x, int y);
nuclear@3 21 void motion(int x, int y);
nuclear@2 22 bool write_ppm(const char *fname, float *fb, int xsz, int ysz);
nuclear@2 23
nuclear@3 24 static int xsz, ysz;
nuclear@3 25 static bool need_update = true;
nuclear@3 26
nuclear@8 27 static float cam_theta, cam_phi = 25.0;
nuclear@8 28 static float cam_dist = 10.0;
nuclear@8 29
nuclear@32 30 static bool dbg_glrender = false;
nuclear@27 31 static bool dbg_show_kdtree = false;
nuclear@27 32 static bool dbg_show_obj = true;
nuclear@13 33
nuclear@13 34 static Scene scn;
nuclear@39 35 static unsigned int tex;
nuclear@12 36
nuclear@3 37 int main(int argc, char **argv)
nuclear@0 38 {
nuclear@3 39 glutInitWindowSize(800, 600);
nuclear@3 40 glutInit(&argc, argv);
nuclear@13 41
nuclear@13 42 int loaded = 0;
nuclear@13 43 for(int i=1; i<argc; i++) {
nuclear@27 44 if(argv[i][0] == '-' && argv[i][2] == 0) {
nuclear@27 45 switch(argv[i][1]) {
nuclear@27 46 case 'i':
nuclear@27 47 if(!argv[++i] || !isdigit(argv[i][0])) {
nuclear@27 48 fprintf(stderr, "-i must be followed by the intersection cost\n");
nuclear@27 49 return 1;
nuclear@27 50 }
nuclear@27 51
nuclear@27 52 set_accel_param(ACCEL_PARAM_COST_INTERSECT, atoi(argv[i]));
nuclear@27 53 break;
nuclear@27 54
nuclear@27 55 case 't':
nuclear@27 56 if(!argv[++i] || !isdigit(argv[i][0])) {
nuclear@27 57 fprintf(stderr, "-t must be followed by the traversal cost\n");
nuclear@27 58 return 1;
nuclear@27 59 }
nuclear@27 60
nuclear@27 61 set_accel_param(ACCEL_PARAM_COST_TRAVERSE, atoi(argv[i]));
nuclear@27 62 break;
nuclear@27 63
nuclear@27 64 case 'c':
nuclear@27 65 if(!argv[++i] || !isdigit(argv[i][0])) {
nuclear@27 66 fprintf(stderr, "-c must be followed by the max number of items per leaf node\n");
nuclear@27 67 return 1;
nuclear@27 68 }
nuclear@27 69
nuclear@27 70 set_accel_param(ACCEL_PARAM_MAX_NODE_ITEMS, atoi(argv[i]));
nuclear@27 71 break;
nuclear@27 72
nuclear@27 73 default:
nuclear@27 74 fprintf(stderr, "unrecognized option: %s\n", argv[i]);
nuclear@27 75 return 1;
nuclear@27 76 }
nuclear@27 77 } else {
nuclear@27 78 if(!scn.load(argv[i])) {
nuclear@27 79 fprintf(stderr, "failed to load scene: %s\n", argv[i]);
nuclear@27 80 return false;
nuclear@27 81 }
nuclear@27 82 loaded++;
nuclear@13 83 }
nuclear@13 84 }
nuclear@13 85
nuclear@13 86 if(!loaded) {
nuclear@13 87 fprintf(stderr, "you must specify a scene file to load\n");
nuclear@13 88 return false;
nuclear@13 89 }
nuclear@13 90 if(!scn.get_num_faces()) {
nuclear@13 91 fprintf(stderr, "didn't load any polygons\n");
nuclear@13 92 return false;
nuclear@13 93 }
nuclear@13 94
nuclear@18 95 glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
nuclear@3 96 glutCreateWindow("OpenCL Raytracer");
nuclear@0 97
nuclear@3 98 xsz = glutGet(GLUT_WINDOW_WIDTH);
nuclear@3 99 ysz = glutGet(GLUT_WINDOW_HEIGHT);
nuclear@2 100
nuclear@3 101 glutDisplayFunc(disp);
nuclear@3 102 glutReshapeFunc(reshape);
nuclear@3 103 glutKeyboardFunc(keyb);
nuclear@3 104 glutMouseFunc(mouse);
nuclear@3 105 glutMotionFunc(motion);
nuclear@0 106
nuclear@32 107 unsigned int *test_pattern = new unsigned int[xsz * ysz];
nuclear@32 108 for(int i=0; i<ysz; i++) {
nuclear@32 109 for(int j=0; j<xsz; j++) {
nuclear@32 110 test_pattern[i * xsz + j] = ((i >> 4) & 1) == ((j >> 4) & 1) ? 0xff0000 : 0xff00;
nuclear@32 111 }
nuclear@32 112 }
nuclear@27 113
nuclear@39 114 glGenTextures(1, &tex);
nuclear@39 115 glBindTexture(GL_TEXTURE_2D, tex);
nuclear@3 116 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
nuclear@3 117 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
nuclear@3 118 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
nuclear@3 119 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@39 120 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F_ARB, xsz, ysz, 0, GL_RGBA, GL_UNSIGNED_BYTE, test_pattern);
nuclear@32 121 delete [] test_pattern;
nuclear@2 122
nuclear@39 123 if(!init_opencl()) {
nuclear@39 124 return 1;
nuclear@39 125 }
nuclear@39 126
nuclear@39 127 if(!init_renderer(xsz, ysz, &scn, tex)) {
nuclear@39 128 return 1;
nuclear@39 129 }
nuclear@39 130 atexit(cleanup);
nuclear@39 131
nuclear@3 132 glutMainLoop();
nuclear@0 133 return 0;
nuclear@0 134 }
nuclear@2 135
nuclear@3 136 void cleanup()
nuclear@2 137 {
nuclear@3 138 destroy_renderer();
nuclear@3 139 }
nuclear@2 140
nuclear@12 141 static Matrix4x4 mat, inv_mat, inv_trans;
nuclear@12 142
nuclear@3 143 void disp()
nuclear@3 144 {
nuclear@8 145 glMatrixMode(GL_MODELVIEW);
nuclear@8 146 glLoadIdentity();
nuclear@8 147
nuclear@3 148 if(need_update) {
nuclear@12 149 glPushMatrix();
nuclear@12 150 glRotatef(-cam_theta, 0, 1, 0);
nuclear@12 151 glRotatef(-cam_phi, 1, 0, 0);
nuclear@12 152 glTranslatef(0, 0, cam_dist);
nuclear@8 153
nuclear@12 154 glGetFloatv(GL_MODELVIEW_MATRIX, mat.m);
nuclear@8 155
nuclear@12 156 inv_mat = mat;
nuclear@12 157 inv_mat.invert();
nuclear@12 158
nuclear@12 159 /*inv_trans = inv_mat;
nuclear@12 160 inv_trans.transpose();*/
nuclear@12 161 inv_trans = mat;
nuclear@12 162 inv_trans.m[3] = inv_trans.m[7] = inv_trans.m[11] = 0.0;
nuclear@12 163 inv_trans.m[12] = inv_trans.m[13] = inv_trans.m[14] = 0.0;
nuclear@12 164 inv_trans.m[15] = 1.0;
nuclear@12 165
nuclear@12 166 set_xform(mat.m, inv_trans.m);
nuclear@8 167 glPopMatrix();
nuclear@8 168
nuclear@13 169 if(!dbg_glrender) {
nuclear@13 170 if(!render()) {
nuclear@13 171 exit(1);
nuclear@13 172 }
nuclear@13 173 need_update = false;
nuclear@12 174 }
nuclear@3 175 }
nuclear@2 176
nuclear@12 177 if(dbg_glrender) {
nuclear@12 178 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@12 179 glLoadMatrixf(inv_mat.m);
nuclear@27 180 dbg_render_gl(&scn, dbg_show_kdtree, dbg_show_obj);
nuclear@12 181 } else {
nuclear@12 182 glEnable(GL_TEXTURE_2D);
nuclear@22 183 glDisable(GL_LIGHTING);
nuclear@2 184
nuclear@12 185 glBegin(GL_QUADS);
nuclear@12 186 glColor3f(1, 1, 1);
nuclear@12 187 glTexCoord2f(0, 1); glVertex2f(-1, -1);
nuclear@12 188 glTexCoord2f(1, 1); glVertex2f(1, -1);
nuclear@12 189 glTexCoord2f(1, 0); glVertex2f(1, 1);
nuclear@12 190 glTexCoord2f(0, 0); glVertex2f(-1, 1);
nuclear@12 191 glEnd();
nuclear@2 192
nuclear@12 193 glDisable(GL_TEXTURE_2D);
nuclear@12 194 }
nuclear@3 195
nuclear@3 196 glutSwapBuffers();
nuclear@3 197 }
nuclear@3 198
nuclear@3 199 void reshape(int x, int y)
nuclear@3 200 {
nuclear@3 201 glViewport(0, 0, x, y);
nuclear@3 202
nuclear@3 203 /* reallocate the framebuffer */
nuclear@3 204 /*delete [] fb;
nuclear@3 205 fb = new float[x * y * 4];
nuclear@3 206 set_framebuffer(fb, x, y);*/
nuclear@3 207 }
nuclear@3 208
nuclear@3 209 void keyb(unsigned char key, int x, int y)
nuclear@3 210 {
nuclear@3 211 switch(key) {
nuclear@3 212 case 27:
nuclear@3 213 exit(0);
nuclear@3 214
nuclear@12 215 case 'r':
nuclear@12 216 need_update = true;
nuclear@12 217 glutPostRedisplay();
nuclear@3 218 break;
nuclear@3 219
nuclear@12 220 case 'd':
nuclear@12 221 dbg_glrender = !dbg_glrender;
nuclear@12 222 if(dbg_glrender) {
nuclear@21 223 printf("Debug OpenGL rendering\n");
nuclear@21 224 } else {
nuclear@21 225 printf("Raytracing\n");
nuclear@12 226 }
nuclear@3 227 glutPostRedisplay();
nuclear@3 228 break;
nuclear@3 229
nuclear@27 230 case 'k':
nuclear@27 231 dbg_show_kdtree = !dbg_show_kdtree;
nuclear@27 232 if(dbg_glrender) {
nuclear@27 233 glutPostRedisplay();
nuclear@27 234 }
nuclear@27 235 break;
nuclear@27 236
nuclear@27 237 case 'o':
nuclear@27 238 dbg_show_obj = !dbg_show_obj;
nuclear@27 239 if(dbg_glrender) {
nuclear@27 240 glutPostRedisplay();
nuclear@27 241 }
nuclear@27 242 break;
nuclear@27 243
nuclear@3 244 default:
nuclear@3 245 break;
nuclear@3 246 }
nuclear@3 247 }
nuclear@3 248
nuclear@8 249 static bool bnstate[32];
nuclear@8 250 static int prev_x, prev_y;
nuclear@8 251
nuclear@3 252 void mouse(int bn, int state, int x, int y)
nuclear@3 253 {
nuclear@8 254 if(state == GLUT_DOWN) {
nuclear@8 255 prev_x = x;
nuclear@8 256 prev_y = y;
nuclear@8 257 bnstate[bn] = true;
nuclear@8 258 } else {
nuclear@8 259 bnstate[bn] = false;
nuclear@8 260 }
nuclear@3 261 }
nuclear@3 262
nuclear@8 263 #define ROT_SCALE 0.5
nuclear@8 264 #define PAN_SCALE 0.1
nuclear@8 265
nuclear@3 266 void motion(int x, int y)
nuclear@3 267 {
nuclear@8 268 int dx = x - prev_x;
nuclear@8 269 int dy = y - prev_y;
nuclear@8 270 prev_x = x;
nuclear@8 271 prev_y = y;
nuclear@8 272
nuclear@8 273 if(bnstate[0]) {
nuclear@8 274 cam_theta += dx * ROT_SCALE;
nuclear@8 275 cam_phi += dy * ROT_SCALE;
nuclear@8 276
nuclear@12 277 if(cam_phi < -89) cam_phi = -89;
nuclear@8 278 if(cam_phi > 89) cam_phi = 89;
nuclear@8 279
nuclear@8 280 need_update = true;
nuclear@8 281 glutPostRedisplay();
nuclear@8 282 }
nuclear@8 283 if(bnstate[2]) {
nuclear@8 284 cam_dist += dy * PAN_SCALE;
nuclear@8 285 if(cam_dist < 0) cam_dist = 0;
nuclear@8 286
nuclear@8 287 need_update = true;
nuclear@8 288 glutPostRedisplay();
nuclear@8 289 }
nuclear@2 290 }
nuclear@2 291
nuclear@2 292 bool write_ppm(const char *fname, float *fb, int xsz, int ysz)
nuclear@2 293 {
nuclear@2 294 FILE *fp;
nuclear@2 295
nuclear@2 296 if(!(fp = fopen(fname, "wb"))) {
nuclear@2 297 fprintf(stderr, "write_ppm: failed to open file %s for writing: %s\n", fname, strerror(errno));
nuclear@2 298 return false;
nuclear@2 299 }
nuclear@2 300 fprintf(fp, "P6\n%d %d\n255\n", xsz, ysz);
nuclear@2 301
nuclear@2 302 for(int i=0; i<xsz * ysz * 4; i++) {
nuclear@2 303 if(i % 4 == 3) continue;
nuclear@2 304
nuclear@2 305 unsigned char c = (unsigned char)(fb[i] * 255.0);
nuclear@2 306 fputc(c, fp);
nuclear@2 307 }
nuclear@2 308 fclose(fp);
nuclear@2 309 return true;
nuclear@2 310 }