Mercurial > hg > dmlib
annotate blittest.c @ 62:daeb5d4f6bad
Do include "dmtext.h" where necessary.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Mon, 01 Oct 2012 09:50:43 +0300 |
| parents | 76a7d469eab9 |
| children | 7d611ebac3e5 |
| rev | line source |
|---|---|
| 0 | 1 #include "dmlib.h" |
| 2 #include "dmargs.h" | |
| 3 #include "dmvecmat.h" | |
|
62
daeb5d4f6bad
Do include "dmtext.h" where necessary.
Matti Hamalainen <ccr@tnsp.org>
parents:
58
diff
changeset
|
4 #include "dmtext.h" |
| 0 | 5 #include <math.h> |
| 6 | |
| 7 #define DM_COLORS (256) | |
| 8 | |
|
6
187f50f02f17
Fix blittest, remove useless code.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
9 char *optFontFile = "font.ttf"; |
| 0 | 10 BOOL optBenchmark = FALSE; |
| 11 int optVFlags = SDL_SWSURFACE | SDL_HWPALETTE; | |
| 12 int optScrWidth = 640, optScrHeight = 480, optFontSize = 20, optScrDepth = 32; | |
| 13 int optBenchmarkLen = 20; | |
| 14 | |
| 15 DMOptArg optList[] = { | |
| 16 { 0, '?', "help", "Show this help", OPT_NONE }, | |
| 17 { 2, 'v', "verbose", "Be more verbose", OPT_NONE }, | |
| 18 { 3, 'f', "full", "Fullscreen", OPT_NONE }, | |
| 19 { 4, 'h', "hw", "Use SDL hardware surface", OPT_NONE }, | |
| 20 { 5, 's', "size", "Initial window size/resolution -s 640x480", OPT_ARGREQ }, | |
| 58 | 21 { 6, 'd', "depth", "Color depth of mode/window in bits (8/32)", OPT_ARGREQ }, |
| 0 | 22 { 7, 'b', "bench", "Run in benchmark mode", OPT_NONE }, |
| 23 }; | |
| 24 | |
| 25 const int optListN = sizeof(optList) / sizeof(optList[0]); | |
| 26 | |
| 27 | |
| 28 void argShowHelp() | |
| 29 { | |
| 30 dmArgsPrintHelp(stdout, optList, optListN); | |
| 31 } | |
| 32 | |
| 33 | |
| 34 BOOL argHandleOpt(const int optN, char *optArg, char *currArg) | |
| 35 { | |
| 36 switch (optN) { | |
| 37 case 0: | |
| 38 argShowHelp(); | |
| 39 exit(0); | |
| 40 break; | |
| 41 | |
| 42 case 2: | |
| 43 dmVerbosity++; | |
| 44 break; | |
| 45 | |
| 46 case 3: | |
| 47 optVFlags |= SDL_FULLSCREEN; | |
| 48 break; | |
| 49 | |
| 50 case 6: | |
| 51 if (optArg) | |
| 52 optScrDepth = atoi(optArg); | |
| 53 break; | |
| 54 | |
| 55 case 5: | |
| 56 { | |
| 57 int w, h; | |
| 58 if (sscanf(optArg, "%dx%d", &w, &h) == 2) | |
| 59 { | |
| 60 if (w < 320 || h < 200 || w > 3200 || h > 3200) | |
| 61 { | |
| 62 dmError("Invalid width or height: %d x %d\n", w, h); | |
| 63 return FALSE; | |
| 64 } | |
| 65 optScrWidth = w; | |
| 66 optScrHeight = h; | |
| 67 } | |
| 68 else | |
| 69 { | |
| 70 dmError("Invalid size argument '%s'.\n", optArg); | |
| 71 return FALSE; | |
| 72 } | |
| 73 } | |
| 74 break; | |
| 75 | |
| 76 case 7: | |
| 77 optBenchmark = TRUE; | |
| 78 break; | |
| 79 | |
| 80 default: | |
| 81 dmError("Unknown option '%s'.\n", currArg); | |
| 82 return FALSE; | |
| 83 } | |
| 84 | |
| 85 return TRUE; | |
| 86 } | |
| 87 | |
| 88 | |
| 89 void DM_MakePalette(SDL_Surface *scr) | |
| 90 { | |
| 91 SDL_Color pal[DM_COLORS]; | |
| 92 int n; | |
| 93 | |
| 94 for (n = 0; n < 256; n++) | |
| 95 { | |
| 96 pal[n].r = n; | |
| 97 pal[n].g = n; | |
| 98 pal[n].b = n; | |
| 99 } | |
| 100 | |
| 101 SDL_SetColors(scr, pal, 0, DM_COLORS); | |
| 102 } | |
| 103 | |
| 104 | |
| 105 void DM_PrintRect(FILE *f, SDL_Rect *r) | |
| 106 { | |
| 107 fprintf(f, "SDL_Rect <%d, %d : %d, %d>\n", | |
| 108 r->x, r->y, r->w, r->h); | |
| 109 } | |
| 110 | |
| 111 BOOL DM_InitializeVideo(SDL_Surface **screen) | |
| 112 { | |
| 113 *screen = SDL_SetVideoMode(optScrWidth, optScrHeight, optScrDepth, optVFlags | SDL_RESIZABLE); | |
| 114 if (*screen == NULL) | |
| 115 { | |
| 116 dmError("Can't SDL_SetVideoMode(): %s\n", SDL_GetError()); | |
| 117 return FALSE; | |
| 118 } | |
| 119 | |
| 120 #if 0 | |
| 121 SDL_Rect r; | |
| 122 r.x = -50; | |
| 123 r.y = 50; | |
| 124 r.w = 700; | |
| 125 r.h = 300; | |
| 126 DM_PrintRect(stderr, &r); | |
| 127 SDL_SetClipRect(*screen, &r); | |
| 128 DM_PrintRect(stderr, &r); | |
| 129 DM_PrintRect(stderr, &((*screen)->clip_rect)); | |
| 130 #endif | |
| 131 | |
| 132 return TRUE; | |
| 133 } | |
| 134 | |
| 135 void DM_Random(SDL_Surface *screen, int q) | |
| 136 { | |
| 137 Uint8 *pix = screen->pixels; | |
| 138 int xc, yc; | |
| 139 | |
| 140 for (yc = 0; yc < screen->h; yc++) | |
| 141 { | |
| 142 Uint8 *dp = pix; | |
| 143 | |
| 144 for (xc = 0; xc < screen->w; xc++) | |
| 145 *dp++ = yc + (xc ^ q) + (yc & q); | |
| 146 | |
| 147 pix += screen->pitch; | |
| 148 } | |
| 149 } | |
| 150 | |
| 151 void DM_Perlin(SDL_Surface *screen, float f) | |
| 152 { | |
| 153 Uint8 *pix = screen->pixels; | |
| 154 int xc, yc; | |
| 155 | |
| 156 for (yc = 0; yc < screen->h; yc++) | |
| 157 { | |
| 158 Uint8 *dp = pix; | |
| 159 | |
| 160 for (xc = 0; xc < screen->w; xc++) | |
| 161 { | |
| 162 *dp++ = 128 + dmPerlinNoise2D(xc, yc, 0.01, 0.1, 3) / 34.0; | |
| 163 } | |
| 164 | |
| 165 pix += screen->pitch; | |
| 166 } | |
| 167 } | |
| 168 | |
| 169 | |
| 170 #define QWIDTH 256 | |
| 171 #define QHEIGHT 160 | |
| 172 | |
| 173 typedef Uint8 DMBlockMap[QHEIGHT][QWIDTH]; | |
| 174 | |
| 175 | |
| 176 static DMFloat dmClip(DMFloat a) | |
| 177 { | |
| 178 return (a < 0.0f ? 0.0f : (a > 1.0f ? 1.0f : a)); | |
| 179 } | |
| 180 | |
| 181 | |
| 182 void dmMakeBumpMap(DMBlockMap map, DMFloat q, DMFloat m) | |
| 183 { | |
| 184 int x, y; | |
| 185 for (y = 0; y < QHEIGHT; y++) | |
| 186 for (x = 0; x < QWIDTH; x++) | |
| 187 { | |
| 188 DMFloat f = 0.40f + dmPerlinNoise2D(x, y, 1.1f, q, 2); | |
| 189 map[y][x] = (int) (dmClip(f) * m); | |
| 190 } | |
| 191 } | |
| 192 | |
| 193 | |
| 194 void dmShadowTraceHeightMap(DMBlockMap lightMap, DMBlockMap pheightMap, DMVector *light) | |
| 195 { | |
| 196 int i, j; | |
| 197 | |
| 198 for (j = 0; j < QHEIGHT; j++) | |
| 199 for (i = 0; i < QWIDTH; i++) | |
| 200 { | |
| 201 DMVector vr, vl, va; | |
| 202 DMFloat vrayLen, vfactor; | |
| 203 int vlen; | |
| 204 BOOL wasHit; | |
| 205 | |
| 206 // Perform shadow occlusion via simplistic raytracing | |
| 207 vr.x = i; | |
| 208 vr.y = j; | |
| 209 vr.z = light->z; // - 10.0; | |
| 210 // vr.z = pheightMap[j][i]; | |
| 211 | |
| 212 // Calculate light vector vector | |
| 213 dm_vector_sub_r(&vl, &vr, light); | |
| 214 vrayLen = dm_vector_length(&vl); | |
| 215 | |
| 216 #if 1 | |
| 217 dm_vector_copy(&va, &vl); | |
| 218 dm_vector_normalize(&va); | |
| 219 dm_vector_scale(&va, 0.6f); | |
| 220 dm_vector_copy(&vr, light); | |
| 221 | |
| 222 vlen = 0; | |
| 223 wasHit = FALSE; | |
| 224 do | |
| 225 { | |
| 226 float h; | |
| 227 | |
| 228 // If ray is inside the heightmap, get value | |
| 229 if (vr.x >= 0 && vr.y >= 0 && vr.x < QWIDTH && vr.y < QHEIGHT) | |
| 230 h = pheightMap[(int) vr.y][(int) vr.x]; | |
| 231 else | |
| 232 break; | |
| 233 | |
| 234 // Check for hits | |
| 235 if (h > vr.z) | |
| 236 wasHit = TRUE; | |
| 237 else | |
| 238 { | |
| 239 // Move forwards | |
| 240 dm_vector_add(&vr, &va); | |
| 241 vlen++; | |
| 242 } | |
| 243 } | |
| 244 while (!wasHit && vlen <= vrayLen); | |
| 245 | |
| 246 // Check if the ray hit something, e.g. is this point occluded? | |
| 247 if (wasHit && vlen < vrayLen) | |
| 248 { | |
| 249 vfactor = vlen * 0.01; | |
| 250 } | |
| 251 else | |
| 252 vfactor = vlen * 0.02; | |
| 253 #endif | |
| 254 | |
| 255 #if 1 | |
| 256 { | |
| 257 /* Calculate light's intensity based on the angle it "hits" | |
| 258 * | |
| 259 * 1) Calculate the vectors that form the imaginary "plane" | |
| 260 * 2) Cross-product -> normal vector of the plane | |
| 261 * 2) Normalize the normal vector | |
| 262 * 3) Calculate light vector's hit angle by dot product | |
| 263 */ | |
| 264 DMVector v1, v2; | |
| 265 DMFloat c; | |
| 266 | |
| 267 v1.x = 2.0f; | |
| 268 v1.y = 0.0f; | |
| 269 v1.z = (DMFloat) (pheightMap[j][i] - pheightMap[j][i + 1]); | |
| 270 | |
| 271 v2.x = 0.0f; | |
| 272 v2.y = 2.0f; | |
| 273 v2.z = (DMFloat) (pheightMap[j][i] - pheightMap[j + 1][i]); | |
| 274 | |
| 275 dm_vector_cross(&vr, &v1, &v2); | |
| 276 dm_vector_normalize(&vr); | |
| 277 dm_vector_normalize(&vl); | |
| 278 c = dm_vector_dot(&vl, &vr); | |
| 279 | |
| 280 vrayLen = 255 - (vrayLen * 0.1) * vrayLen + (c * 128.0f) + (vfactor * vfactor * 1255); | |
| 281 } | |
| 282 #else | |
| 283 vrayLen = 255 - vrayLen * vrayLen * (vfactor * vfactor); | |
| 284 if (vrayLen < 0) vrayLen = 0; | |
| 285 vrayLen += pheightMap[j][i]; | |
| 286 #endif | |
| 287 | |
| 288 // Clip result | |
| 289 if (vrayLen < 0) | |
| 290 vrayLen = 0; | |
| 291 else if (vrayLen > 255.0f) | |
| 292 vrayLen = 255.0f; | |
| 293 | |
| 294 lightMap[j][i] = vrayLen; | |
| 295 } | |
| 296 } | |
| 297 | |
| 298 | |
| 299 int main(int argc, char *argv[]) | |
| 300 { | |
|
6
187f50f02f17
Fix blittest, remove useless code.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
301 SDL_Surface *screen = NULL, *bmap = NULL; |
| 0 | 302 TTF_Font *font = NULL; |
| 303 SDL_Color fontcol={255,155,155,0}; | |
| 304 SDL_Event event; | |
| 305 int mouseX, mouseY; | |
|
6
187f50f02f17
Fix blittest, remove useless code.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
306 BOOL initSDL = FALSE, initTTF = FALSE, exitFlag, showMap = FALSE; |
| 0 | 307 |
| 308 dmInitProg("blittest", "dmlib blittest", "0.2", NULL, NULL); | |
| 309 if (!dmArgsProcess(argc, argv, optList, optListN, | |
| 310 argHandleOpt, NULL, FALSE)) | |
| 311 exit(1); | |
| 312 | |
| 313 if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER) != 0) | |
| 314 { | |
| 315 dmError("Could not initialize SDL: %s\n", SDL_GetError()); | |
| 316 goto error_exit; | |
| 317 } | |
| 318 initSDL = TRUE; | |
| 319 | |
| 320 | |
| 321 if (TTF_Init() < 0) | |
| 322 { | |
| 323 dmError("Could not initialize FreeType/TTF: %s\n", SDL_GetError()); | |
| 324 goto error_exit; | |
| 325 } | |
| 326 initTTF = TRUE; | |
| 327 | |
| 328 font = TTF_OpenFont(optFontFile, optFontSize); | |
| 329 if (font == NULL) | |
| 330 { | |
| 331 dmError("Could not load TTF font '%s' (%d): %s\n", | |
| 332 optFontFile, optFontSize, SDL_GetError()); | |
| 333 goto error_exit; | |
| 334 } | |
| 335 TTF_SetFontStyle(font, TTF_STYLE_NORMAL); | |
| 336 | |
| 337 if (optBenchmark) | |
| 338 { | |
| 339 screen = SDL_CreateRGBSurface(SDL_SWSURFACE, optScrWidth, optScrHeight, optScrDepth, 0, 0, 0, 0); | |
| 340 if (screen == NULL) | |
| 341 { | |
| 342 dmError("Could not create screen surface.\n"); | |
| 343 goto error_exit; | |
| 344 } | |
| 345 | |
| 346 dmMsg(0, "Benchmark mode, not opening window.\n"); | |
| 347 } | |
| 348 else | |
| 349 { | |
| 350 if (!DM_InitializeVideo(&screen)) | |
| 351 goto error_exit; | |
| 352 | |
| 353 SDL_WM_SetCaption("Halleluja", "DMT"); | |
| 354 } | |
| 355 | |
| 356 dmPerlinInit(); | |
| 357 | |
| 358 bmap = SDL_CreateRGBSurface(SDL_SWSURFACE, QWIDTH, QHEIGHT, 8, 0, 0, 0, 0); | |
| 359 DM_MakePalette(bmap); | |
| 360 DM_Random(bmap, 15); | |
| 361 | |
| 362 DMVector light; | |
| 363 DMBlockMap heightMap; | |
| 364 light.x = light.y = 128; | |
| 365 light.z = 128; | |
| 366 dmMakeBumpMap(heightMap, 0.06, 254); | |
| 367 | |
| 368 | |
| 369 | |
| 370 int numFrames = 0, startTime = SDL_GetTicks(), endTime = 0; | |
| 371 exitFlag = FALSE; | |
| 372 | |
| 373 if (optBenchmark) | |
| 374 dmMsg(0, "Starting benchmark, running for %d seconds.\n", optBenchmarkLen); | |
| 375 | |
| 376 while (!exitFlag) | |
| 377 { | |
| 378 dmMakeBumpMap(heightMap, 0.05 + sin(SDL_GetTicks() * 0.001) * 0.002 , 254); | |
| 379 if (!optBenchmark) | |
| 380 { | |
| 381 while (SDL_PollEvent(&event)) | |
| 382 switch (event.type) | |
| 383 { | |
| 384 case SDL_KEYDOWN: | |
| 385 switch (event.key.keysym.sym) | |
| 386 { | |
| 387 case SDLK_ESCAPE: exitFlag = TRUE; break; | |
| 388 | |
| 389 case SDLK_F5: | |
| 390 showMap = !showMap; | |
| 391 break; | |
| 392 | |
| 393 default: | |
| 394 break; | |
| 395 } | |
| 396 | |
| 397 break; | |
| 398 | |
| 399 case SDL_VIDEORESIZE: | |
| 400 optScrWidth = event.resize.w; | |
| 401 optScrHeight = event.resize.h; | |
| 402 | |
| 403 if (!DM_InitializeVideo(&screen)) | |
| 404 goto error_exit; | |
| 405 | |
| 406 break; | |
| 407 | |
| 408 case SDL_VIDEOEXPOSE: | |
| 409 break; | |
| 410 | |
| 411 case SDL_QUIT: | |
| 412 exit(0); | |
| 413 } | |
| 414 | |
| 415 SDL_GetMouseState(&mouseX, &mouseY); | |
| 416 light.x = ((DMFloat) mouseX * QWIDTH) / (DMFloat) optScrWidth; | |
| 417 light.y = ((DMFloat) mouseY * QHEIGHT) / (DMFloat) optScrHeight; | |
| 418 } | |
| 419 | |
| 420 if (!optBenchmark && SDL_MUSTLOCK(screen) != 0 && SDL_LockSurface(screen) != 0) | |
| 421 { | |
| 422 dmError("Can't lock surface.\n"); | |
| 423 goto error_exit; | |
| 424 } | |
| 425 | |
| 426 | |
| 427 if (showMap) | |
| 428 memcpy(bmap->pixels, heightMap, QWIDTH * QHEIGHT); | |
| 429 else | |
| 430 dmShadowTraceHeightMap(bmap->pixels, heightMap, &light); | |
| 431 | |
| 432 dmScaledBlitSurfaceAny(bmap, 0, 0, screen->w, screen->h, screen, DMD_NONE); | |
| 433 | |
| 434 if (!optBenchmark) | |
| 435 { | |
| 436 dmDrawTTFText(screen, font, fontcol, 0, 0, "%3.1f FPS", | |
| 437 (float) (numFrames * 1000.0f) / (float) (endTime - startTime)); | |
| 438 | |
| 439 if (SDL_MUSTLOCK(screen) != 0) | |
| 440 SDL_UnlockSurface(screen); | |
| 441 | |
| 442 SDL_Flip(screen); | |
| 443 SDL_Delay(10); | |
| 444 } | |
| 445 | |
| 446 endTime = SDL_GetTicks(); | |
| 447 numFrames++; | |
| 448 | |
| 449 if (optBenchmark) | |
| 450 { | |
| 451 if (endTime - startTime > optBenchmarkLen * 1000) | |
| 452 exitFlag = TRUE; | |
| 453 } | |
| 454 } | |
| 455 | |
| 456 // Print benchmark results | |
| 457 dmMsg(0, "%d frames in %d ms, fps = %1.3f\n", | |
| 458 numFrames, endTime - startTime, | |
| 459 (float) (numFrames * 1000.0f) / (float) (endTime - startTime)); | |
| 460 | |
| 461 | |
| 462 error_exit: | |
| 463 dmMsg(0, "Shutting down dmlib.\n"); | |
| 464 if (screen) | |
| 465 SDL_FreeSurface(screen); | |
| 466 | |
| 467 if (font) | |
| 468 TTF_CloseFont(font); | |
| 469 | |
| 470 if (initSDL) | |
| 471 SDL_Quit(); | |
| 472 | |
| 473 if (initTTF) | |
| 474 TTF_Quit(); | |
| 475 | |
| 476 return 0; | |
| 477 } |