Generic GL write test
| 351 | |
| 352 | // Generic GL write test |
| 353 | int writeTest(int format) |
| 354 | { |
| 355 | PF *pf = pf_get(format); |
| 356 | unsigned char *rgbaBuffer = NULL; |
| 357 | int n, retval = 0; |
| 358 | double rbtime; |
| 359 | char temps[STRLEN]; |
| 360 | |
| 361 | try |
| 362 | { |
| 363 | fprintf(stderr, "glDrawPixels(): "); |
| 364 | glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
| 365 | glPixelStorei(GL_PACK_ALIGNMENT, 1); |
| 366 | glShadeModel(GL_FLAT); |
| 367 | glDisable(GL_DEPTH_TEST); |
| 368 | glDisable(GL_LIGHTING); |
| 369 | clearFB(); |
| 370 | if((rgbaBuffer = (unsigned char *)malloc(drawableWidth * drawableHeight * |
| 371 | pf->size)) == NULL) |
| 372 | THROW("Could not allocate buffer"); |
| 373 | initBuf(0, 0, drawableWidth, drawableHeight, pf, rgbaBuffer); |
| 374 | n = 0; |
| 375 | timer.start(); |
| 376 | do |
| 377 | { |
| 378 | glDrawPixels(drawableWidth, drawableHeight, glFormat[format], |
| 379 | pf_gldatatype[format], rgbaBuffer); |
| 380 | glFinish(); |
| 381 | n++; |
| 382 | } while((rbtime = timer.elapsed()) < benchTime || n < 2); |
| 383 | |
| 384 | double avgmps = (double)n * (double)(drawableWidth * drawableHeight) / |
| 385 | (1000000. * rbtime); |
| 386 | check_errors("frame buffer write"); |
| 387 | fprintf(stderr, "%s Mpixels/sec\n", sigFig(4, temps, avgmps)); |
| 388 | |
| 389 | } |
| 390 | catch(std::exception &e) |
| 391 | { |
| 392 | fprintf(stderr, "%s\n", e.what()); retval = -1; |
| 393 | } |
| 394 | |
| 395 | free(rgbaBuffer); |
| 396 | return retval; |
| 397 | } |
| 398 | |
| 399 | |
| 400 | // Generic OpenGL readback test |