progs/egl/demo3.c

   1 /*
   2  * Exercise EGL API functions
   3  */
   4
   5 #include <GLES/egl.h>
   6 #include <assert.h>
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10
  11
  12
  13 #define PIXEL_CENTER(x) ((long)(x) + 0.5)
  14
  15 #define GAP 10
  16 #define ROWS 3
  17 #define COLS 4
  18
  19 #define OPENGL_WIDTH 48
  20 #define OPENGL_HEIGHT 13
  21
  22
  23 GLenum rgb, doubleBuffer, windType;
  24 GLint windW, windH;
  25
  26 GLenum mode1, mode2;
  27 GLint boxW, boxH;
  28 GLubyte OpenGL_bits[] = {
  29    0x00, 0x03, 0x00, 0x00, 0x00, 0x00,
  30    0x7f, 0xfb, 0xff, 0xff, 0xff, 0x01,
  31    0x7f, 0xfb, 0xff, 0xff, 0xff, 0x01,
  32    0x00, 0x03, 0x00, 0x00, 0x00, 0x00,
  33    0x3e, 0x8f, 0xb7, 0xf9, 0xfc, 0x01,
  34    0x63, 0xdb, 0xb0, 0x8d, 0x0d, 0x00,
  35    0x63, 0xdb, 0xb7, 0x8d, 0x0d, 0x00,
  36    0x63, 0xdb, 0xb6, 0x8d, 0x0d, 0x00,
  37    0x63, 0x8f, 0xf3, 0xcc, 0x0d, 0x00,
  38    0x63, 0x00, 0x00, 0x0c, 0x4c, 0x0a,
  39    0x63, 0x00, 0x00, 0x0c, 0x4c, 0x0e,
  40    0x63, 0x00, 0x00, 0x8c, 0xed, 0x0e,
  41    0x3e, 0x00, 0x00, 0xf8, 0x0c, 0x00,
  42 };
  43
  44
  45 static void Init(void)
  46 {
  47
  48     mode1 = GL_TRUE;
  49     mode2 = GL_TRUE;
  50 }
  51
  52 static void Reshape(int width, int height)
  53 {
  54
  55     windW = (GLint)width;
  56     windH = (GLint)height;
  57 }
  58
  59 #if 0
  60 static void RotateColorMask(void)
  61 {
  62     static GLint rotation = 0;
  63
  64     rotation = (rotation + 1) & 0x3;
  65     switch (rotation) {
  66       case 0:
  67         glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
  68         glIndexMask( 0xff );
  69         break;
  70       case 1:
  71         glColorMask(GL_FALSE, GL_TRUE, GL_TRUE, GL_TRUE);
  72         glIndexMask(0xFE);
  73         break;
  74       case 2:
  75         glColorMask(GL_TRUE, GL_FALSE, GL_TRUE, GL_TRUE);
  76         glIndexMask(0xFD);
  77         break;
  78       case 3:
  79         glColorMask(GL_TRUE, GL_TRUE, GL_FALSE, GL_TRUE);
  80         glIndexMask(0xFB);
  81         break;
  82     }
  83 }
  84 #endif
  85
  86 static void Viewport(GLint row, GLint column)
  87 {
  88     GLint x, y;
  89
  90     boxW = (windW - (COLS + 1) * GAP) / COLS;
  91     boxH = (windH - (ROWS + 1) * GAP) / ROWS;
  92
  93     x = GAP + column * (boxW + GAP);
  94     y = GAP + row * (boxH + GAP);
  95
  96     glViewport(x, y, boxW, boxH);
  97
  98     glMatrixMode(GL_PROJECTION);
  99     glLoadIdentity();
 100     glOrtho(-boxW/2, boxW/2, -boxH/2, boxH/2, 0.0, 1.0);
 101     glMatrixMode(GL_MODELVIEW);
 102
 103     glEnable(GL_SCISSOR_TEST);
 104     glScissor(x, y, boxW, boxH);
 105 }
 106
 107 enum {
 108     COLOR_BLACK = 0,
 109     COLOR_RED,
 110     COLOR_GREEN,
 111     COLOR_YELLOW,
 112     COLOR_BLUE,
 113     COLOR_MAGENTA,
 114     COLOR_CYAN,
 115     COLOR_WHITE
 116 };
 117
 118 static float RGBMap[9][3] = {
 119     {0, 0, 0},
 120     {1, 0, 0},
 121     {0, 1, 0},
 122     {1, 1, 0},
 123     {0, 0, 1},
 124     {1, 0, 1},
 125     {0, 1, 1},
 126     {1, 1, 1},
 127     {0.5, 0.5, 0.5}
 128 };
 129
 130 static void SetColor(int c)
 131 {
 132      glColor3fv(RGBMap[c]);
 133 }
 134
 135 static void Point(void)
 136 {
 137     GLint i;
 138
 139     glBegin(GL_POINTS);
 140         SetColor(COLOR_WHITE);
 141         glVertex2i(0, 0);
 142         for (i = 1; i < 8; i++) {
 143             GLint j = i * 2;
 144             SetColor(COLOR_BLACK+i);
 145             glVertex2i(-j, -j);
 146             glVertex2i(-j, 0);
 147             glVertex2i(-j, j);
 148             glVertex2i(0, j);
 149             glVertex2i(j, j);
 150             glVertex2i(j, 0);
 151             glVertex2i(j, -j);
 152             glVertex2i(0, -j);
 153         }
 154     glEnd();
 155 }
 156
 157 static void Lines(void)
 158 {
 159     GLint i;
 160
 161     glPushMatrix();
 162
 163     glTranslatef(-12, 0, 0);
 164     for (i = 1; i < 8; i++) {
 165         SetColor(COLOR_BLACK+i);
 166         glBegin(GL_LINES);
 167             glVertex2i(-boxW/4, -boxH/4);
 168             glVertex2i(boxW/4, boxH/4);
 169         glEnd();
 170         glTranslatef(4, 0, 0);
 171     }
 172
 173     glPopMatrix();
 174
 175     glBegin(GL_LINES);
 176         glVertex2i(0, 0);
 177     glEnd();
 178 }
 179
 180 static void LineStrip(void)
 181 {
 182
 183     glBegin(GL_LINE_STRIP);
 184         SetColor(COLOR_RED);
 185         glVertex2f(PIXEL_CENTER(-boxW/4), PIXEL_CENTER(-boxH/4));
 186         SetColor(COLOR_GREEN);
 187         glVertex2f(PIXEL_CENTER(-boxW/4), PIXEL_CENTER(boxH/4));
 188         SetColor(COLOR_BLUE);
 189         glVertex2f(PIXEL_CENTER(boxW/4), PIXEL_CENTER(boxH/4));
 190         SetColor(COLOR_WHITE);
 191         glVertex2f(PIXEL_CENTER(boxW/4), PIXEL_CENTER(-boxH/4));
 192     glEnd();
 193
 194     glBegin(GL_LINE_STRIP);
 195         glVertex2i(0, 0);
 196     glEnd();
 197 }
 198
 199 static void LineLoop(void)
 200 {
 201
 202     glBegin(GL_LINE_LOOP);
 203         SetColor(COLOR_RED);
 204         glVertex2f(PIXEL_CENTER(-boxW/4), PIXEL_CENTER(-boxH/4));
 205         SetColor(COLOR_GREEN);
 206         glVertex2f(PIXEL_CENTER(-boxW/4), PIXEL_CENTER(boxH/4));
 207         SetColor(COLOR_BLUE);
 208         glVertex2f(PIXEL_CENTER(boxW/4), PIXEL_CENTER(boxH/4));
 209         SetColor(COLOR_WHITE);
 210         glVertex2f(PIXEL_CENTER(boxW/4), PIXEL_CENTER(-boxH/4));
 211     glEnd();
 212
 213     glEnable(GL_LOGIC_OP);
 214     glLogicOp(GL_XOR);
 215
 216     glEnable(GL_BLEND);
 217     glBlendFunc(GL_ONE, GL_ONE);
 218
 219     SetColor(COLOR_MAGENTA);
 220     glBegin(GL_LINE_LOOP);
 221         glVertex2f(PIXEL_CENTER(-boxW/8), PIXEL_CENTER(-boxH/8));
 222         glVertex2f(PIXEL_CENTER(-boxW/8), PIXEL_CENTER(boxH/8));
 223     glEnd();
 224     glBegin(GL_LINE_LOOP);
 225         glVertex2f(PIXEL_CENTER(-boxW/8), PIXEL_CENTER(boxH/8+5));
 226         glVertex2f(PIXEL_CENTER(boxW/8), PIXEL_CENTER(boxH/8+5));
 227     glEnd();
 228     glDisable(GL_LOGIC_OP);
 229     glDisable(GL_BLEND);
 230
 231     SetColor(COLOR_GREEN);
 232     glBegin(GL_POINTS);
 233         glVertex2i(0, 0);
 234     glEnd();
 235
 236     glBegin(GL_LINE_LOOP);
 237         glVertex2i(0, 0);
 238     glEnd();
 239 }
 240
 241 static void Bitmap(void)
 242 {
 243
 244     glBegin(GL_LINES);
 245         SetColor(COLOR_GREEN);
 246         glVertex2i(-boxW/2, 0);
 247         glVertex2i(boxW/2, 0);
 248         glVertex2i(0, -boxH/2);
 249         glVertex2i(0, boxH/2);
 250         SetColor(COLOR_RED);
 251         glVertex2i(0, -3);
 252         glVertex2i(0, -3+OPENGL_HEIGHT);
 253         SetColor(COLOR_BLUE);
 254         glVertex2i(0, -3);
 255         glVertex2i(OPENGL_WIDTH, -3);
 256     glEnd();
 257
 258     SetColor(COLOR_GREEN);
 259
 260     glPixelStorei(GL_UNPACK_LSB_FIRST, GL_TRUE);
 261     glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 262
 263     glRasterPos2i(0, 0);
 264     glBitmap(OPENGL_WIDTH, OPENGL_HEIGHT, 0, 3, 0.0, 0.0, OpenGL_bits);
 265 }
 266
 267 static void Triangles(void)
 268 {
 269
 270     glBegin(GL_TRIANGLES);
 271         SetColor(COLOR_GREEN);
 272         glVertex2i(-boxW/4, -boxH/4);
 273         SetColor(COLOR_RED);
 274         glVertex2i(-boxW/8, -boxH/16);
 275         SetColor(COLOR_BLUE);
 276         glVertex2i(boxW/8, -boxH/16);
 277
 278         SetColor(COLOR_GREEN);
 279         glVertex2i(-boxW/4, boxH/4);
 280         SetColor(COLOR_RED);
 281         glVertex2i(-boxW/8, boxH/16);
 282         SetColor(COLOR_BLUE);
 283         glVertex2i(boxW/8, boxH/16);
 284     glEnd();
 285
 286     glBegin(GL_TRIANGLES);
 287         glVertex2i(0, 0);
 288         glVertex2i(-100, 100);
 289     glEnd();
 290 }
 291
 292 static void TriangleStrip(void)
 293 {
 294
 295     glBegin(GL_TRIANGLE_STRIP);
 296         SetColor(COLOR_GREEN);
 297         glVertex2i(-boxW/4, -boxH/4);
 298         SetColor(COLOR_RED);
 299         glVertex2i(-boxW/4, boxH/4);
 300         SetColor(COLOR_BLUE);
 301         glVertex2i(0, -boxH/4);
 302         SetColor(COLOR_WHITE);
 303         glVertex2i(0, boxH/4);
 304         SetColor(COLOR_CYAN);
 305         glVertex2i(boxW/4, -boxH/4);
 306         SetColor(COLOR_YELLOW);
 307         glVertex2i(boxW/4, boxH/4);
 308     glEnd();
 309
 310     glBegin(GL_TRIANGLE_STRIP);
 311         glVertex2i(0, 0);
 312         glVertex2i(-100, 100);
 313     glEnd();
 314 }
 315
 316 static void TriangleFan(void)
 317 {
 318     GLint vx[8][2];
 319     GLint x0, y0, x1, y1, x2, y2, x3, y3;
 320     GLint i;
 321
 322     y0 = -boxH/4;
 323     y1 = y0 + boxH/2/3;
 324     y2 = y1 + boxH/2/3;
 325     y3 = boxH/4;
 326     x0 = -boxW/4;
 327     x1 = x0 + boxW/2/3;
 328     x2 = x1 + boxW/2/3;
 329     x3 = boxW/4;
 330
 331     vx[0][0] = x0; vx[0][1] = y1;
 332     vx[1][0] = x0; vx[1][1] = y2;
 333     vx[2][0] = x1; vx[2][1] = y3;
 334     vx[3][0] = x2; vx[3][1] = y3;
 335     vx[4][0] = x3; vx[4][1] = y2;
 336     vx[5][0] = x3; vx[5][1] = y1;
 337     vx[6][0] = x2; vx[6][1] = y0;
 338     vx[7][0] = x1; vx[7][1] = y0;
 339
 340     glBegin(GL_TRIANGLE_FAN);
 341         SetColor(COLOR_WHITE);
 342         glVertex2i(0, 0);
 343         for (i = 0; i < 8; i++) {
 344             SetColor(COLOR_WHITE-i);
 345             glVertex2iv(vx[i]);
 346         }
 347     glEnd();
 348
 349     glBegin(GL_TRIANGLE_FAN);
 350         glVertex2i(0, 0);
 351         glVertex2i(-100, 100);
 352     glEnd();
 353 }
 354
 355 static void Rect(void)
 356 {
 357
 358     SetColor(COLOR_GREEN);
 359     glRecti(-boxW/4, -boxH/4, boxW/4, boxH/4);
 360 }
 361
 362 static void PolygonFunc(void)
 363 {
 364     GLint vx[8][2];
 365     GLint x0, y0, x1, y1, x2, y2, x3, y3;
 366     GLint i;
 367
 368     y0 = -boxH/4;
 369     y1 = y0 + boxH/2/3;
 370     y2 = y1 + boxH/2/3;
 371     y3 = boxH/4;
 372     x0 = -boxW/4;
 373     x1 = x0 + boxW/2/3;
 374     x2 = x1 + boxW/2/3;
 375     x3 = boxW/4;
 376
 377     vx[0][0] = x0; vx[0][1] = y1;
 378     vx[1][0] = x0; vx[1][1] = y2;
 379     vx[2][0] = x1; vx[2][1] = y3;
 380     vx[3][0] = x2; vx[3][1] = y3;
 381     vx[4][0] = x3; vx[4][1] = y2;
 382     vx[5][0] = x3; vx[5][1] = y1;
 383     vx[6][0] = x2; vx[6][1] = y0;
 384     vx[7][0] = x1; vx[7][1] = y0;
 385
 386     glBegin(GL_POLYGON);
 387         for (i = 0; i < 8; i++) {
 388             SetColor(COLOR_WHITE-i);
 389             glVertex2iv(vx[i]);
 390         }
 391     glEnd();
 392
 393     glBegin(GL_POLYGON);
 394         glVertex2i(0, 0);
 395         glVertex2i(100, 100);
 396     glEnd();
 397 }
 398
 399 static void Quads(void)
 400 {
 401
 402     glBegin(GL_QUADS);
 403         SetColor(COLOR_GREEN);
 404         glVertex2i(-boxW/4, -boxH/4);
 405         SetColor(COLOR_RED);
 406         glVertex2i(-boxW/8, -boxH/16);
 407         SetColor(COLOR_BLUE);
 408         glVertex2i(boxW/8, -boxH/16);
 409         SetColor(COLOR_WHITE);
 410         glVertex2i(boxW/4, -boxH/4);
 411
 412         SetColor(COLOR_GREEN);
 413         glVertex2i(-boxW/4, boxH/4);
 414         SetColor(COLOR_RED);
 415         glVertex2i(-boxW/8, boxH/16);
 416         SetColor(COLOR_BLUE);
 417         glVertex2i(boxW/8, boxH/16);
 418         SetColor(COLOR_WHITE);
 419         glVertex2i(boxW/4, boxH/4);
 420     glEnd();
 421
 422     glBegin(GL_QUADS);
 423         glVertex2i(0, 0);
 424         glVertex2i(100, 100);
 425         glVertex2i(-100, 100);
 426     glEnd();
 427 }
 428
 429 static void QuadStrip(void)
 430 {
 431
 432     glBegin(GL_QUAD_STRIP);
 433         SetColor(COLOR_GREEN);
 434         glVertex2i(-boxW/4, -boxH/4);
 435         SetColor(COLOR_RED);
 436         glVertex2i(-boxW/4, boxH/4);
 437         SetColor(COLOR_BLUE);
 438         glVertex2i(0, -boxH/4);
 439         SetColor(COLOR_WHITE);
 440         glVertex2i(0, boxH/4);
 441         SetColor(COLOR_CYAN);
 442         glVertex2i(boxW/4, -boxH/4);
 443         SetColor(COLOR_YELLOW);
 444         glVertex2i(boxW/4, boxH/4);
 445     glEnd();
 446
 447     glBegin(GL_QUAD_STRIP);
 448         glVertex2i(0, 0);
 449         glVertex2i(100, 100);
 450         glVertex2i(-100, 100);
 451     glEnd();
 452 }
 453
 454 static void Draw(EGLDisplay dpy, EGLSurface surf)
 455 {
 456
 457     glViewport(0, 0, windW, windH);
 458     glDisable(GL_SCISSOR_TEST);
 459
 460     glPushAttrib(GL_COLOR_BUFFER_BIT);
 461
 462     glColorMask(1, 1, 1, 1);
 463     glIndexMask(~0);
 464
 465     glClearColor(0.0, 0.0, 0.0, 0.0);
 466     glClear(GL_COLOR_BUFFER_BIT);
 467
 468     glPopAttrib();
 469
 470     if (mode1) {
 471         glShadeModel(GL_SMOOTH);
 472     } else {
 473         glShadeModel(GL_FLAT);
 474     }
 475
 476     if (mode2) {
 477         glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
 478     } else {
 479         glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
 480     }
 481
 482     Viewport(0, 0); Point();
 483     Viewport(0, 1); Lines();
 484     Viewport(0, 2); LineStrip();
 485     Viewport(0, 3); LineLoop();
 486
 487     Viewport(1, 0); Bitmap();
 488
 489     Viewport(1, 1); TriangleFan();
 490     Viewport(1, 2); Triangles();
 491     Viewport(1, 3); TriangleStrip();
 492
 493     Viewport(2, 0); Rect();
 494     Viewport(2, 1); PolygonFunc();
 495     Viewport(2, 2); Quads();
 496     Viewport(2, 3); QuadStrip();
 497
 498     glFlush();
 499
 500     if (doubleBuffer) {
 501         eglSwapBuffers(dpy, surf);
 502     }
 503 }
 504
 505 static void
 506 write_ppm(const char *filename, const GLubyte *buffer, int width, int height)
 507 {
 508    const int binary = 0;
 509    FILE *f = fopen( filename, "w" );
 510    if (f) {
 511       int i, x, y;
 512       const GLubyte *ptr = buffer;
 513       if (binary) {
 514          fprintf(f,"P6\n");
 515          fprintf(f,"# ppm-file created by osdemo.c\n");
 516          fprintf(f,"%i %i\n", width,height);
 517          fprintf(f,"255\n");
 518          fclose(f);
 519          f = fopen( filename, "ab" );  /* reopen in binary append mode */
 520          for (y=height-1; y>=0; y--) {
 521             for (x=0; x<width; x++) {
 522                i = (y*width + x) * 4;
 523                fputc(ptr[i], f);   /* write red */
 524                fputc(ptr[i+1], f); /* write green */
 525                fputc(ptr[i+2], f); /* write blue */
 526             }
 527          }
 528       }
 529       else {
 530          /*ASCII*/
 531          int counter = 0;
 532          fprintf(f,"P3\n");
 533          fprintf(f,"# ascii ppm file created by osdemo.c\n");
 534          fprintf(f,"%i %i\n", width, height);
 535          fprintf(f,"255\n");
 536          for (y=height-1; y>=0; y--) {
 537             for (x=0; x<width; x++) {
 538                i = (y*width + x) * 4;
 539                fprintf(f, " %3d %3d %3d", ptr[i], ptr[i+1], ptr[i+2]);
 540                counter++;
 541                if (counter % 5 == 0)
 542                   fprintf(f, "\n");
 543             }
 544          }
 545       }
 546       fclose(f);
 547    }
 548 }
 549
 550 #include "../src/egl/main/egldisplay.h"
 551
 552 typedef struct fb_display
 553 {
 554    _EGLDisplay Base;  /* base class/object */
 555    void *pFB;
 556 } fbDisplay;
 557
 558
 559 int
 560 main(int argc, char *argv[])
 561 {
 562    int maj, min;
 563    EGLContext ctx;
 564    EGLSurface screen_surf;
 565    EGLConfig configs[10];
 566    EGLScreenMESA screen;
 567    EGLModeMESA mode;
 568    EGLint numConfigs, count;
 569    EGLBoolean b;
 570    const EGLint screenAttribs[] = {
 571       EGL_WIDTH, 1024,
 572       EGL_HEIGHT, 768,
 573       EGL_NONE
 574    };
 575
 576    /*
 577    EGLDisplay d = eglGetDisplay(EGL_DEFAULT_DISPLAY);
 578    */
 579    EGLDisplay d = eglGetDisplay(":0");
 580    assert(d);
 581
 582    if (!eglInitialize(d, &maj, &min)) {
 583       printf("demo: eglInitialize failed\n");
 584       exit(1);
 585    }
 586
 587    printf("EGL version = %d.%d\n", maj, min);
 588    printf("EGL_VENDOR = %s\n", eglQueryString(d, EGL_VENDOR));
 589
 590    eglGetConfigs(d, configs, 10, &numConfigs);
 591    eglGetScreensMESA(d, &screen, 1, &count);
 592    eglGetModesMESA(d, screen, &mode, 1, &count);
 593
 594    ctx = eglCreateContext(d, configs[0], EGL_NO_CONTEXT, NULL);
 595    if (ctx == EGL_NO_CONTEXT) {
 596       printf("failed to create context\n");
 597       return 0;
 598    }
 599
 600    screen_surf = eglCreateScreenSurfaceMESA(d, configs[0], screenAttribs);
 601    if (screen_surf == EGL_NO_SURFACE) {
 602       printf("failed to create screen surface\n");
 603       return 0;
 604    }
 605
 606    eglShowScreenSurfaceMESA(d, screen, screen_surf, mode);
 607
 608    b = eglMakeCurrent(d, screen_surf, screen_surf, ctx);
 609    if (!b) {
 610       printf("make current failed\n");
 611       return 0;
 612    }
 613    glViewport(0, 0, 1024, 768);
 614
 615
 616    Init();
 617    Reshape(1024, 768);
 618
 619    glDrawBuffer( GL_FRONT );
 620    glClearColor( 0, 1.0, 0, 1);
 621
 622    glClear( GL_COLOR_BUFFER_BIT );
 623
 624    doubleBuffer = 1;
 625    glDrawBuffer( GL_BACK );
 626
 627    Draw(d, screen_surf);
 628
 629    write_ppm("dump.ppm", ((struct fb_display *)_eglLookupDisplay(d))->pFB, 1024, 768);
 630
 631    eglDestroySurface(d, screen_surf);
 632    eglDestroyContext(d, ctx);
 633    eglTerminate(d);
 634
 635    return 0;
 636 }