kmscube.c

   1 /*
   2  * Copyright (c) 2012 Arvin Schnell <arvin.schnell@gmail.com>
   3  * Copyright (c) 2012 Rob Clark <rob@ti.com>
   4  * Copyright (c) 2013 Anand Balagopalakrishnan <anandb@ti.com>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sub license,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial portions
  15  * of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23  * DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 /* Based on a egl cube test app originally written by Arvin Schnell */
  27
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <fcntl.h>
  31 #include <string.h>
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <unistd.h>
  35 #include <errno.h>
  36
  37 #include <xf86drm.h>
  38 #include <xf86drmMode.h>
  39 #include <gbm.h>
  40
  41 #include "esUtil.h"
  42
  43 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
  44
  45 #define MAX_DISPLAYS    (4)
  46 uint8_t DISP_ID = 0;
  47 uint8_t all_display = 0;
  48 int8_t connector_id = -1;
  49
  50 static struct {
  51         EGLDisplay display;
  52         EGLConfig config;
  53         EGLContext context;
  54         EGLSurface surface;
  55         GLuint program;
  56         GLint modelviewmatrix, modelviewprojectionmatrix, normalmatrix;
  57         GLuint vbo;
  58         GLuint positionsoffset, colorsoffset, normalsoffset;
  59         GLuint vertex_shader, fragment_shader;
  60 } gl;
  61
  62 static struct {
  63         struct gbm_device *dev;
  64         struct gbm_surface *surface;
  65 } gbm;
  66
  67 static struct {
  68         int fd;
  69         uint32_t ndisp;
  70         uint32_t crtc_id[MAX_DISPLAYS];
  71         uint32_t connector_id[MAX_DISPLAYS];
  72         uint32_t resource_id;
  73         uint32_t encoder[MAX_DISPLAYS];
  74         drmModeModeInfo *mode[MAX_DISPLAYS];
  75         drmModeConnector *connectors[MAX_DISPLAYS];
  76 } drm;
  77
  78 struct drm_fb {
  79         struct gbm_bo *bo;
  80         uint32_t fb_id;
  81 };
  82
  83 static int init_drm(void)
  84 {
  85         static const char *modules[] = {
  86                         "omapdrm", "i915", "radeon", "nouveau", "vmwgfx", "exynos"
  87         };
  88         drmModeRes *resources;
  89         drmModeConnector *connector = NULL;
  90         drmModeEncoder *encoder = NULL;
  91         int i, j;
  92         uint32_t maxRes, curRes;
  93
  94         for (i = 0; i < ARRAY_SIZE(modules); i++) {
  95                 printf("trying to load module %s...", modules[i]);
  96                 drm.fd = drmOpen(modules[i], NULL);
  97                 if (drm.fd < 0) {
  98                         printf("failed.\n");
  99                 } else {
 100                         printf("success.\n");
 101                         break;
 102                 }
 103         }
 104
 105         if (drm.fd < 0) {
 106                 printf("could not open drm device\n");
 107                 return -1;
 108         }
 109
 110         resources = drmModeGetResources(drm.fd);
 111         if (!resources) {
 112                 printf("drmModeGetResources failed: %s\n", strerror(errno));
 113                 return -1;
 114         }
 115         drm.resource_id = (uint32_t) resources;
 116
 117         /* find a connected connector: */
 118         for (i = 0; i < resources->count_connectors; i++) {
 119                 connector = drmModeGetConnector(drm.fd, resources->connectors[i]);
 120                 if (connector->connection == DRM_MODE_CONNECTED) {
 121                         /* choose the first supported mode */
 122                         drm.mode[drm.ndisp] = &connector->modes[0];
 123                         drm.connector_id[drm.ndisp] = connector->connector_id;
 124
 125                         for (j=0; j<resources->count_encoders; j++) {
 126                                 encoder = drmModeGetEncoder(drm.fd, resources->encoders[j]);
 127                                 if (encoder->encoder_id == connector->encoder_id)
 128                                         break;
 129
 130                                 drmModeFreeEncoder(encoder);
 131                                 encoder = NULL;
 132                         }
 133
 134                         if (!encoder) {
 135                                 printf("no encoder!\n");
 136                                 return -1;
 137                         }
 138
 139                         drm.encoder[drm.ndisp]  = (uint32_t) encoder;
 140                         drm.crtc_id[drm.ndisp] = encoder->crtc_id;
 141                         drm.connectors[drm.ndisp] = connector;
 142
 143                         printf("### Display [%d]: CRTC = %d, Connector = %d\n", drm.ndisp, drm.crtc_id[drm.ndisp], drm.connector_id[drm.ndisp]);
 144                         printf("\tMode chosen [%s] : Clock => %d, Vertical refresh => %d, Type => %d\n", drm.mode[drm.ndisp]->name, drm.mode[drm.ndisp]->clock, drm.mode[drm.ndisp]->vrefresh, drm.mode[drm.ndisp]->type);
 145                         printf("\tHorizontal => %d, %d, %d, %d, %d\n", drm.mode[drm.ndisp]->hdisplay, drm.mode[drm.ndisp]->hsync_start, drm.mode[drm.ndisp]->hsync_end, drm.mode[drm.ndisp]->htotal, drm.mode[drm.ndisp]->hskew);
 146                         printf("\tVertical => %d, %d, %d, %d, %d\n", drm.mode[drm.ndisp]->vdisplay, drm.mode[drm.ndisp]->vsync_start, drm.mode[drm.ndisp]->vsync_end, drm.mode[drm.ndisp]->vtotal, drm.mode[drm.ndisp]->vscan);
 147
 148                         /* If a connector_id is specified, use the corresponding display */
 149                         if ((connector_id != -1) && (connector_id == drm.connector_id[drm.ndisp]))
 150                                 DISP_ID = drm.ndisp;
 151
 152                         /* If all displays are enabled, choose the connector with maximum
 153                         * resolution as the primary display */
 154                         if (all_display) {
 155                                 maxRes = drm.mode[DISP_ID]->vdisplay * drm.mode[DISP_ID]->hdisplay;
 156                                 curRes = drm.mode[drm.ndisp]->vdisplay * drm.mode[drm.ndisp]->hdisplay;
 157
 158                                 if (curRes > maxRes)
 159                                         DISP_ID = drm.ndisp;
 160                         }
 161
 162                         drm.ndisp++;
 163                 } else {
 164                         drmModeFreeConnector(connector);
 165                 }
 166         }
 167
 168         if (drm.ndisp == 0) {
 169                 /* we could be fancy and listen for hotplug events and wait for
 170                  * a connector..
 171                  */
 172                 printf("no connected connector!\n");
 173                 return -1;
 174         }
 175
 176         return 0;
 177 }
 178
 179 static int init_gbm(void)
 180 {
 181         gbm.dev = gbm_create_device(drm.fd);
 182
 183         gbm.surface = gbm_surface_create(gbm.dev,
 184                         drm.mode[DISP_ID]->hdisplay, drm.mode[DISP_ID]->vdisplay,
 185                         GBM_FORMAT_XRGB8888,
 186                         GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING);
 187         if (!gbm.surface) {
 188                 printf("failed to create gbm surface\n");
 189                 return -1;
 190         }
 191
 192         return 0;
 193 }
 194
 195 static int init_gl(void)
 196 {
 197         EGLint major, minor, n;
 198         GLint ret;
 199
 200         static const GLfloat vVertices[] = {
 201                         // front
 202                         -1.0f, -1.0f, +1.0f, // point blue
 203                         +1.0f, -1.0f, +1.0f, // point magenta
 204                         -1.0f, +1.0f, +1.0f, // point cyan
 205                         +1.0f, +1.0f, +1.0f, // point white
 206                         // back
 207                         +1.0f, -1.0f, -1.0f, // point red
 208                         -1.0f, -1.0f, -1.0f, // point black
 209                         +1.0f, +1.0f, -1.0f, // point yellow
 210                         -1.0f, +1.0f, -1.0f, // point green
 211                         // right
 212                         +1.0f, -1.0f, +1.0f, // point magenta
 213                         +1.0f, -1.0f, -1.0f, // point red
 214                         +1.0f, +1.0f, +1.0f, // point white
 215                         +1.0f, +1.0f, -1.0f, // point yellow
 216                         // left
 217                         -1.0f, -1.0f, -1.0f, // point black
 218                         -1.0f, -1.0f, +1.0f, // point blue
 219                         -1.0f, +1.0f, -1.0f, // point green
 220                         -1.0f, +1.0f, +1.0f, // point cyan
 221                         // top
 222                         -1.0f, +1.0f, +1.0f, // point cyan
 223                         +1.0f, +1.0f, +1.0f, // point white
 224                         -1.0f, +1.0f, -1.0f, // point green
 225                         +1.0f, +1.0f, -1.0f, // point yellow
 226                         // bottom
 227                         -1.0f, -1.0f, -1.0f, // point black
 228                         +1.0f, -1.0f, -1.0f, // point red
 229                         -1.0f, -1.0f, +1.0f, // point blue
 230                         +1.0f, -1.0f, +1.0f  // point magenta
 231         };
 232
 233         static const GLfloat vColors[] = {
 234                         // front
 235                         0.0f,  0.0f,  1.0f, // blue
 236                         1.0f,  0.0f,  1.0f, // magenta
 237                         0.0f,  1.0f,  1.0f, // cyan
 238                         1.0f,  1.0f,  1.0f, // white
 239                         // back
 240                         1.0f,  0.0f,  0.0f, // red
 241                         0.0f,  0.0f,  0.0f, // black
 242                         1.0f,  1.0f,  0.0f, // yellow
 243                         0.0f,  1.0f,  0.0f, // green
 244                         // right
 245                         1.0f,  0.0f,  1.0f, // magenta
 246                         1.0f,  0.0f,  0.0f, // red
 247                         1.0f,  1.0f,  1.0f, // white
 248                         1.0f,  1.0f,  0.0f, // yellow
 249                         // left
 250                         0.0f,  0.0f,  0.0f, // black
 251                         0.0f,  0.0f,  1.0f, // blue
 252                         0.0f,  1.0f,  0.0f, // green
 253                         0.0f,  1.0f,  1.0f, // cyan
 254                         // top
 255                         0.0f,  1.0f,  1.0f, // cyan
 256                         1.0f,  1.0f,  1.0f, // white
 257                         0.0f,  1.0f,  0.0f, // green
 258                         1.0f,  1.0f,  0.0f, // yellow
 259                         // bottom
 260                         0.0f,  0.0f,  0.0f, // black
 261                         1.0f,  0.0f,  0.0f, // red
 262                         0.0f,  0.0f,  1.0f, // blue
 263                         1.0f,  0.0f,  1.0f  // magenta
 264         };
 265
 266         static const GLfloat vNormals[] = {
 267                         // front
 268                         +0.0f, +0.0f, +1.0f, // forward
 269                         +0.0f, +0.0f, +1.0f, // forward
 270                         +0.0f, +0.0f, +1.0f, // forward
 271                         +0.0f, +0.0f, +1.0f, // forward
 272                         // back
 273                         +0.0f, +0.0f, -1.0f, // backbard
 274                         +0.0f, +0.0f, -1.0f, // backbard
 275                         +0.0f, +0.0f, -1.0f, // backbard
 276                         +0.0f, +0.0f, -1.0f, // backbard
 277                         // right
 278                         +1.0f, +0.0f, +0.0f, // right
 279                         +1.0f, +0.0f, +0.0f, // right
 280                         +1.0f, +0.0f, +0.0f, // right
 281                         +1.0f, +0.0f, +0.0f, // right
 282                         // left
 283                         -1.0f, +0.0f, +0.0f, // left
 284                         -1.0f, +0.0f, +0.0f, // left
 285                         -1.0f, +0.0f, +0.0f, // left
 286                         -1.0f, +0.0f, +0.0f, // left
 287                         // top
 288                         +0.0f, +1.0f, +0.0f, // up
 289                         +0.0f, +1.0f, +0.0f, // up
 290                         +0.0f, +1.0f, +0.0f, // up
 291                         +0.0f, +1.0f, +0.0f, // up
 292                         // bottom
 293                         +0.0f, -1.0f, +0.0f, // down
 294                         +0.0f, -1.0f, +0.0f, // down
 295                         +0.0f, -1.0f, +0.0f, // down
 296                         +0.0f, -1.0f, +0.0f  // down
 297         };
 298
 299         static const EGLint context_attribs[] = {
 300                 EGL_CONTEXT_CLIENT_VERSION, 2,
 301                 EGL_NONE
 302         };
 303
 304         static const EGLint config_attribs[] = {
 305                 EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 306                 EGL_RED_SIZE, 1,
 307                 EGL_GREEN_SIZE, 1,
 308                 EGL_BLUE_SIZE, 1,
 309                 EGL_ALPHA_SIZE, 0,
 310                 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
 311                 EGL_NONE
 312         };
 313
 314         static const char *vertex_shader_source =
 315                         "uniform mat4 modelviewMatrix;      \n"
 316                         "uniform mat4 modelviewprojectionMatrix;\n"
 317                         "uniform mat3 normalMatrix;         \n"
 318                         "                                   \n"
 319                         "attribute vec4 in_position;        \n"
 320                         "attribute vec3 in_normal;          \n"
 321                         "attribute vec4 in_color;           \n"
 322                         "\n"
 323                         "vec4 lightSource = vec4(2.0, 2.0, 20.0, 0.0);\n"
 324                         "                                   \n"
 325                         "varying vec4 vVaryingColor;        \n"
 326                         "                                   \n"
 327                         "void main()                        \n"
 328                         "{                                  \n"
 329                         "    gl_Position = modelviewprojectionMatrix * in_position;\n"
 330                         "    vec3 vEyeNormal = normalMatrix * in_normal;\n"
 331                         "    vec4 vPosition4 = modelviewMatrix * in_position;\n"
 332                         "    vec3 vPosition3 = vPosition4.xyz / vPosition4.w;\n"
 333                         "    vec3 vLightDir = normalize(lightSource.xyz - vPosition3);\n"
 334                         "    float diff = max(0.0, dot(vEyeNormal, vLightDir));\n"
 335                         "    vVaryingColor = vec4(diff * in_color.rgb, 1.0);\n"
 336                         "}                                  \n";
 337
 338         static const char *fragment_shader_source =
 339                         "precision mediump float;           \n"
 340                         "                                   \n"
 341                         "varying vec4 vVaryingColor;        \n"
 342                         "                                   \n"
 343                         "void main()                        \n"
 344                         "{                                  \n"
 345                         "    gl_FragColor = vVaryingColor;  \n"
 346                         "}                                  \n";
 347
 348         gl.display = eglGetDisplay(gbm.dev);
 349
 350         if (!eglInitialize(gl.display, &major, &minor)) {
 351                 printf("failed to initialize\n");
 352                 return -1;
 353         }
 354
 355         printf("Using display %p with EGL version %d.%d\n",
 356                         gl.display, major, minor);
 357
 358         printf("EGL Version \"%s\"\n", eglQueryString(gl.display, EGL_VERSION));
 359         printf("EGL Vendor \"%s\"\n", eglQueryString(gl.display, EGL_VENDOR));
 360         printf("EGL Extensions \"%s\"\n", eglQueryString(gl.display, EGL_EXTENSIONS));
 361
 362         if (!eglBindAPI(EGL_OPENGL_ES_API)) {
 363                 printf("failed to bind api EGL_OPENGL_ES_API\n");
 364                 return -1;
 365         }
 366
 367         if (!eglChooseConfig(gl.display, config_attribs, &gl.config, 1, &n) || n != 1) {
 368                 printf("failed to choose config: %d\n", n);
 369                 return -1;
 370         }
 371
 372         gl.context = eglCreateContext(gl.display, gl.config,
 373                         EGL_NO_CONTEXT, context_attribs);
 374         if (gl.context == NULL) {
 375                 printf("failed to create context\n");
 376                 return -1;
 377         }
 378
 379         gl.surface = eglCreateWindowSurface(gl.display, gl.config, gbm.surface, NULL);
 380         if (gl.surface == EGL_NO_SURFACE) {
 381                 printf("failed to create egl surface\n");
 382                 return -1;
 383         }
 384
 385         /* connect the context to the surface */
 386         eglMakeCurrent(gl.display, gl.surface, gl.surface, gl.context);
 387
 388
 389         gl.vertex_shader = glCreateShader(GL_VERTEX_SHADER);
 390
 391         glShaderSource(gl.vertex_shader, 1, &vertex_shader_source, NULL);
 392         glCompileShader(gl.vertex_shader);
 393
 394         glGetShaderiv(gl.vertex_shader, GL_COMPILE_STATUS, &ret);
 395         if (!ret) {
 396                 char *log;
 397
 398                 printf("vertex shader compilation failed!:\n");
 399                 glGetShaderiv(gl.vertex_shader, GL_INFO_LOG_LENGTH, &ret);
 400                 if (ret > 1) {
 401                         log = malloc(ret);
 402                         glGetShaderInfoLog(gl.vertex_shader, ret, NULL, log);
 403                         printf("%s", log);
 404                 }
 405
 406                 return -1;
 407         }
 408
 409         gl.fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
 410
 411         glShaderSource(gl.fragment_shader, 1, &fragment_shader_source, NULL);
 412         glCompileShader(gl.fragment_shader);
 413
 414         glGetShaderiv(gl.fragment_shader, GL_COMPILE_STATUS, &ret);
 415         if (!ret) {
 416                 char *log;
 417
 418                 printf("fragment shader compilation failed!:\n");
 419                 glGetShaderiv(gl.fragment_shader, GL_INFO_LOG_LENGTH, &ret);
 420
 421                 if (ret > 1) {
 422                         log = malloc(ret);
 423                         glGetShaderInfoLog(gl.fragment_shader, ret, NULL, log);
 424                         printf("%s", log);
 425                 }
 426
 427                 return -1;
 428         }
 429
 430         gl.program = glCreateProgram();
 431
 432         glAttachShader(gl.program, gl.vertex_shader);
 433         glAttachShader(gl.program, gl.fragment_shader);
 434
 435         glBindAttribLocation(gl.program, 0, "in_position");
 436         glBindAttribLocation(gl.program, 1, "in_normal");
 437         glBindAttribLocation(gl.program, 2, "in_color");
 438
 439         glLinkProgram(gl.program);
 440
 441         glGetProgramiv(gl.program, GL_LINK_STATUS, &ret);
 442         if (!ret) {
 443                 char *log;
 444
 445                 printf("program linking failed!:\n");
 446                 glGetProgramiv(gl.program, GL_INFO_LOG_LENGTH, &ret);
 447
 448                 if (ret > 1) {
 449                         log = malloc(ret);
 450                         glGetProgramInfoLog(gl.program, ret, NULL, log);
 451                         printf("%s", log);
 452                 }
 453
 454                 return -1;
 455         }
 456
 457         glUseProgram(gl.program);
 458
 459         gl.modelviewmatrix = glGetUniformLocation(gl.program, "modelviewMatrix");
 460         gl.modelviewprojectionmatrix = glGetUniformLocation(gl.program, "modelviewprojectionMatrix");
 461         gl.normalmatrix = glGetUniformLocation(gl.program, "normalMatrix");
 462
 463         glViewport(0, 0, drm.mode[DISP_ID]->hdisplay, drm.mode[DISP_ID]->vdisplay);
 464         glEnable(GL_CULL_FACE);
 465
 466         gl.positionsoffset = 0;
 467         gl.colorsoffset = sizeof(vVertices);
 468         gl.normalsoffset = sizeof(vVertices) + sizeof(vColors);
 469         glGenBuffers(1, &gl.vbo);
 470         glBindBuffer(GL_ARRAY_BUFFER, gl.vbo);
 471         glBufferData(GL_ARRAY_BUFFER, sizeof(vVertices) + sizeof(vColors) + sizeof(vNormals), 0, GL_STATIC_DRAW);
 472         glBufferSubData(GL_ARRAY_BUFFER, gl.positionsoffset, sizeof(vVertices), &vVertices[0]);
 473         glBufferSubData(GL_ARRAY_BUFFER, gl.colorsoffset, sizeof(vColors), &vColors[0]);
 474         glBufferSubData(GL_ARRAY_BUFFER, gl.normalsoffset, sizeof(vNormals), &vNormals[0]);
 475         glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, (const GLvoid*)gl.positionsoffset);
 476         glEnableVertexAttribArray(0);
 477         glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 0, (const GLvoid*)gl.normalsoffset);
 478         glEnableVertexAttribArray(1);
 479         glVertexAttribPointer(2, 3, GL_FLOAT, GL_FALSE, 0, (const GLvoid*)gl.colorsoffset);
 480         glEnableVertexAttribArray(2);
 481
 482         return 0;
 483 }
 484
 485 static void exit_gbm(void)
 486 {
 487         gbm_surface_destroy(gbm.surface);
 488         gbm_device_destroy(gbm.dev);
 489         return;
 490 }
 491
 492 static void exit_gl(void)
 493 {
 494         glDeleteProgram(gl.program);
 495         glDeleteBuffers(1, &gl.vbo);
 496         glDeleteShader(gl.fragment_shader);
 497         glDeleteShader(gl.vertex_shader);
 498         eglDestroySurface(gl.display, gl.surface);
 499         eglDestroyContext(gl.display, gl.context);
 500         eglTerminate(gl.display);
 501         return;
 502 }
 503
 504 static void exit_drm(void)
 505 {
 506
 507         drmModeRes *resources;
 508         int i;
 509
 510         resources = (drmModeRes *)drm.resource_id;
 511         for (i = 0; i < resources->count_connectors; i++) {
 512                 drmModeFreeEncoder(drm.encoder[i]);
 513                 drmModeFreeConnector(drm.connectors[i]);
 514         }
 515         drmModeFreeResources(drm.resource_id);
 516         drmClose(drm.fd);
 517         return;
 518 }
 519
 520 void cleanup_kmscube(void)
 521 {
 522         exit_gl();
 523         exit_gbm();
 524         exit_drm();
 525         printf("Cleanup of GL, GBM and DRM completed\n");
 526         return;
 527 }
 528
 529 static void draw(uint32_t i)
 530 {
 531         ESMatrix modelview;
 532
 533         /* clear the color buffer */
 534         glClearColor(0.5, 0.5, 0.5, 1.0);
 535         glClear(GL_COLOR_BUFFER_BIT);
 536
 537         esMatrixLoadIdentity(&modelview);
 538         esTranslate(&modelview, 0.0f, 0.0f, -8.0f);
 539         esRotate(&modelview, 45.0f + (0.25f * i), 1.0f, 0.0f, 0.0f);
 540         esRotate(&modelview, 45.0f - (0.5f * i), 0.0f, 1.0f, 0.0f);
 541         esRotate(&modelview, 10.0f + (0.15f * i), 0.0f, 0.0f, 1.0f);
 542
 543         GLfloat aspect = (GLfloat)(drm.mode[DISP_ID]->vdisplay) / (GLfloat)(drm.mode[DISP_ID]->hdisplay);
 544
 545         ESMatrix projection;
 546         esMatrixLoadIdentity(&projection);
 547         esFrustum(&projection, -2.8f, +2.8f, -2.8f * aspect, +2.8f * aspect, 6.0f, 10.0f);
 548
 549         ESMatrix modelviewprojection;
 550         esMatrixLoadIdentity(&modelviewprojection);
 551         esMatrixMultiply(&modelviewprojection, &modelview, &projection);
 552
 553         float normal[9];
 554         normal[0] = modelview.m[0][0];
 555         normal[1] = modelview.m[0][1];
 556         normal[2] = modelview.m[0][2];
 557         normal[3] = modelview.m[1][0];
 558         normal[4] = modelview.m[1][1];
 559         normal[5] = modelview.m[1][2];
 560         normal[6] = modelview.m[2][0];
 561         normal[7] = modelview.m[2][1];
 562         normal[8] = modelview.m[2][2];
 563
 564         glUniformMatrix4fv(gl.modelviewmatrix, 1, GL_FALSE, &modelview.m[0][0]);
 565         glUniformMatrix4fv(gl.modelviewprojectionmatrix, 1, GL_FALSE, &modelviewprojection.m[0][0]);
 566         glUniformMatrix3fv(gl.normalmatrix, 1, GL_FALSE, normal);
 567
 568         glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 569         glDrawArrays(GL_TRIANGLE_STRIP, 4, 4);
 570         glDrawArrays(GL_TRIANGLE_STRIP, 8, 4);
 571         glDrawArrays(GL_TRIANGLE_STRIP, 12, 4);
 572         glDrawArrays(GL_TRIANGLE_STRIP, 16, 4);
 573         glDrawArrays(GL_TRIANGLE_STRIP, 20, 4);
 574 }
 575
 576 static void
 577 drm_fb_destroy_callback(struct gbm_bo *bo, void *data)
 578 {
 579         struct drm_fb *fb = data;
 580         struct gbm_device *gbm = gbm_bo_get_device(bo);
 581
 582         if (fb->fb_id)
 583                 drmModeRmFB(drm.fd, fb->fb_id);
 584
 585         free(fb);
 586 }
 587
 588 static struct drm_fb * drm_fb_get_from_bo(struct gbm_bo *bo)
 589 {
 590         struct drm_fb *fb = gbm_bo_get_user_data(bo);
 591         uint32_t width, height, stride, handle;
 592         int ret;
 593
 594         if (fb)
 595                 return fb;
 596
 597         fb = calloc(1, sizeof *fb);
 598         fb->bo = bo;
 599
 600         width = gbm_bo_get_width(bo);
 601         height = gbm_bo_get_height(bo);
 602         stride = gbm_bo_get_stride(bo);
 603         handle = gbm_bo_get_handle(bo).u32;
 604
 605         ret = drmModeAddFB(drm.fd, width, height, 24, 32, stride, handle, &fb->fb_id);
 606         if (ret) {
 607                 printf("failed to create fb: %s\n", strerror(errno));
 608                 free(fb);
 609                 return NULL;
 610         }
 611
 612         gbm_bo_set_user_data(bo, fb, drm_fb_destroy_callback);
 613
 614         return fb;
 615 }
 616
 617 static void page_flip_handler(int fd, unsigned int frame,
 618                   unsigned int sec, unsigned int usec, void *data)
 619 {
 620         int *waiting_for_flip = data;
 621         *waiting_for_flip = 0;
 622 }
 623
 624 void print_usage()
 625 {
 626         printf("Usage : kmscube <options>\n");
 627         printf("\t-h : Help\n");
 628         printf("\t-a : Enable all displays\n");
 629         printf("\t-c <id> : Display using connector_id [if not specified, use the first connected connector]\n");
 630 }
 631
 632 int main(int argc, char *argv[])
 633 {
 634         fd_set fds;
 635         drmEventContext evctx = {
 636                         .version = DRM_EVENT_CONTEXT_VERSION,
 637                         .page_flip_handler = page_flip_handler,
 638         };
 639         struct gbm_bo *bo;
 640         struct drm_fb *fb;
 641         uint32_t i = 0;
 642         int ret;
 643         int opt;
 644
 645         while ((opt = getopt(argc, argv, "ahc:")) != -1) {
 646                 switch(opt) {
 647                 case 'a':
 648                         all_display = 1;
 649                         break;
 650
 651                 case 'h':
 652                         print_usage();
 653                         return 0;
 654
 655                 case 'c':
 656                         connector_id = atoi(optarg);
 657                         break;
 658
 659                 default:
 660                         printf("Undefined option %s\n", argv[optind]);
 661                         print_usage();
 662                         return -1;
 663                 }
 664         }
 665
 666         if (all_display) {
 667                 printf("### Enabling all displays\n");
 668                 connector_id = -1;
 669         }
 670
 671         ret = init_drm();
 672         if (ret) {
 673                 printf("failed to initialize DRM\n");
 674                 return ret;
 675         }
 676         printf("### Primary display => ConnectorId = %d, Resolution = %dx%d\n",
 677                         drm.connector_id[DISP_ID], drm.mode[DISP_ID]->hdisplay,
 678                         drm.mode[DISP_ID]->vdisplay);
 679
 680         FD_ZERO(&fds);
 681         FD_SET(drm.fd, &fds);
 682
 683         ret = init_gbm();
 684         if (ret) {
 685                 printf("failed to initialize GBM\n");
 686                 return ret;
 687         }
 688
 689         ret = init_gl();
 690         if (ret) {
 691                 printf("failed to initialize EGL\n");
 692                 return ret;
 693         }
 694
 695         /* clear the color buffer */
 696         glClearColor(0.5, 0.5, 0.5, 1.0);
 697         glClear(GL_COLOR_BUFFER_BIT);
 698         eglSwapBuffers(gl.display, gl.surface);
 699         bo = gbm_surface_lock_front_buffer(gbm.surface);
 700         fb = drm_fb_get_from_bo(bo);
 701
 702         /* set mode: */
 703         if (all_display) {
 704                 for (i=0; i<drm.ndisp; i++) {
 705                         ret = drmModeSetCrtc(drm.fd, drm.crtc_id[i], fb->fb_id, 0, 0,
 706                                         &drm.connector_id[i], 1, drm.mode[i]);
 707                         if (ret) {
 708                                 printf("display %d failed to set mode: %s\n", i, strerror(errno));
 709                                 return ret;
 710                         }
 711                 }
 712         } else {
 713                 ret = drmModeSetCrtc(drm.fd, drm.crtc_id[DISP_ID], fb->fb_id,
 714                                 0, 0, &drm.connector_id[DISP_ID], 1, drm.mode[DISP_ID]);
 715                 if (ret) {
 716                         printf("display %d failed to set mode: %s\n", DISP_ID, strerror(errno));
 717                         return ret;
 718                 }
 719         }
 720
 721         while (1) {
 722                 struct gbm_bo *next_bo;
 723                 int waiting_for_flip = 1;
 724
 725                 draw(i++);
 726
 727                 eglSwapBuffers(gl.display, gl.surface);
 728                 next_bo = gbm_surface_lock_front_buffer(gbm.surface);
 729                 fb = drm_fb_get_from_bo(next_bo);
 730
 731                 /*
 732                  * Here you could also update drm plane layers if you want
 733                  * hw composition
 734                  */
 735
 736                 ret = drmModePageFlip(drm.fd, drm.crtc_id[DISP_ID], fb->fb_id,
 737                                 DRM_MODE_PAGE_FLIP_EVENT, &waiting_for_flip);
 738                 if (ret) {
 739                         printf("failed to queue page flip: %s\n", strerror(errno));
 740                         return -1;
 741                 }
 742
 743                 while (waiting_for_flip) {
 744                         ret = select(drm.fd + 1, &fds, NULL, NULL, NULL);
 745                         if (ret < 0) {
 746                                 printf("select err: %s\n", strerror(errno));
 747                                 return ret;
 748                         } else if (ret == 0) {
 749                                 printf("select timeout!\n");
 750                                 return -1;
 751                         } else if (FD_ISSET(0, &fds)) {
 752                                 continue;
 753                         }
 754                         drmHandleEvent(drm.fd, &evctx);
 755                 }
 756
 757                 /* release last buffer to render on again: */
 758                 gbm_surface_release_buffer(gbm.surface, bo);
 759                 bo = next_bo;
 760         }
 761
 762         cleanup_kmscube();
 763         printf("\n Exiting kmscube \n");
 764
 765         return ret;
 766 }