1 /* 2 * Copyright (C) 2015-2016 Gerd Hoffmann <kraxel@redhat.com> 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2.1 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public 15 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 16 */ 17 #include "qemu/osdep.h" 18 #include <glob.h> 19 #include <dirent.h> 20 21 #include "qemu/error-report.h" 22 #include "ui/egl-helpers.h" 23 24 EGLDisplay *qemu_egl_display; 25 EGLConfig qemu_egl_config; 26 27 /* ---------------------------------------------------------------------- */ 28 29 static bool egl_gles; 30 static int egl_debug; 31 32 #define egl_dbg(_x ...) \ 33 do { \ 34 if (egl_debug) { \ 35 fprintf(stderr, "egl: " _x); \ 36 } \ 37 } while (0); 38 39 /* ---------------------------------------------------------------------- */ 40 41 #ifdef CONFIG_OPENGL_DMABUF 42 43 int qemu_egl_rn_fd; 44 struct gbm_device *qemu_egl_rn_gbm_dev; 45 EGLContext qemu_egl_rn_ctx; 46 47 static int qemu_egl_rendernode_open(const char *rendernode) 48 { 49 DIR *dir; 50 struct dirent *e; 51 int r, fd; 52 char *p; 53 54 if (rendernode) { 55 return open(rendernode, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK); 56 } 57 58 dir = opendir("/dev/dri"); 59 if (!dir) { 60 return -1; 61 } 62 63 fd = -1; 64 while ((e = readdir(dir))) { 65 if (e->d_type != DT_CHR) { 66 continue; 67 } 68 69 if (strncmp(e->d_name, "renderD", 7)) { 70 continue; 71 } 72 73 p = g_strdup_printf("/dev/dri/%s", e->d_name); 74 75 r = open(p, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK); 76 if (r < 0) { 77 g_free(p); 78 continue; 79 } 80 fd = r; 81 g_free(p); 82 break; 83 } 84 85 closedir(dir); 86 if (fd < 0) { 87 return -1; 88 } 89 return fd; 90 } 91 92 int egl_rendernode_init(const char *rendernode) 93 { 94 qemu_egl_rn_fd = -1; 95 96 qemu_egl_rn_fd = qemu_egl_rendernode_open(rendernode); 97 if (qemu_egl_rn_fd == -1) { 98 error_report("egl: no drm render node available"); 99 goto err; 100 } 101 102 qemu_egl_rn_gbm_dev = gbm_create_device(qemu_egl_rn_fd); 103 if (!qemu_egl_rn_gbm_dev) { 104 error_report("egl: gbm_create_device failed"); 105 goto err; 106 } 107 108 qemu_egl_init_dpy((EGLNativeDisplayType)qemu_egl_rn_gbm_dev, false, false); 109 110 if (!epoxy_has_egl_extension(qemu_egl_display, 111 "EGL_KHR_surfaceless_context")) { 112 error_report("egl: EGL_KHR_surfaceless_context not supported"); 113 goto err; 114 } 115 if (!epoxy_has_egl_extension(qemu_egl_display, 116 "EGL_MESA_image_dma_buf_export")) { 117 error_report("egl: EGL_MESA_image_dma_buf_export not supported"); 118 goto err; 119 } 120 121 qemu_egl_rn_ctx = qemu_egl_init_ctx(); 122 if (!qemu_egl_rn_ctx) { 123 error_report("egl: egl_init_ctx failed"); 124 goto err; 125 } 126 127 return 0; 128 129 err: 130 if (qemu_egl_rn_gbm_dev) { 131 gbm_device_destroy(qemu_egl_rn_gbm_dev); 132 } 133 if (qemu_egl_rn_fd != -1) { 134 close(qemu_egl_rn_fd); 135 } 136 137 return -1; 138 } 139 140 int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc) 141 { 142 EGLImageKHR image; 143 EGLint num_planes, fd; 144 145 image = eglCreateImageKHR(qemu_egl_display, eglGetCurrentContext(), 146 EGL_GL_TEXTURE_2D_KHR, 147 (EGLClientBuffer)(unsigned long)tex_id, 148 NULL); 149 if (!image) { 150 return -1; 151 } 152 153 eglExportDMABUFImageQueryMESA(qemu_egl_display, image, fourcc, 154 &num_planes, NULL); 155 if (num_planes != 1) { 156 eglDestroyImageKHR(qemu_egl_display, image); 157 return -1; 158 } 159 eglExportDMABUFImageMESA(qemu_egl_display, image, &fd, stride, NULL); 160 eglDestroyImageKHR(qemu_egl_display, image); 161 162 return fd; 163 } 164 165 #endif /* CONFIG_OPENGL_DMABUF */ 166 167 /* ---------------------------------------------------------------------- */ 168 169 EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, Window win) 170 { 171 EGLSurface esurface; 172 EGLBoolean b; 173 174 egl_dbg("eglCreateWindowSurface (x11 win id 0x%lx) ...\n", 175 (unsigned long) win); 176 esurface = eglCreateWindowSurface(qemu_egl_display, 177 qemu_egl_config, 178 (EGLNativeWindowType)win, NULL); 179 if (esurface == EGL_NO_SURFACE) { 180 error_report("egl: eglCreateWindowSurface failed"); 181 return NULL; 182 } 183 184 b = eglMakeCurrent(qemu_egl_display, esurface, esurface, ectx); 185 if (b == EGL_FALSE) { 186 error_report("egl: eglMakeCurrent failed"); 187 return NULL; 188 } 189 190 return esurface; 191 } 192 193 /* ---------------------------------------------------------------------- */ 194 195 /* 196 * Taken from glamor_egl.h from the Xorg xserver, which is MIT licensed 197 * 198 * Create an EGLDisplay from a native display type. This is a little quirky 199 * for a few reasons. 200 * 201 * 1: GetPlatformDisplayEXT and GetPlatformDisplay are the API you want to 202 * use, but have different function signatures in the third argument; this 203 * happens not to matter for us, at the moment, but it means epoxy won't alias 204 * them together. 205 * 206 * 2: epoxy 1.3 and earlier don't understand EGL client extensions, which 207 * means you can't call "eglGetPlatformDisplayEXT" directly, as the resolver 208 * will crash. 209 * 210 * 3: You can't tell whether you have EGL 1.5 at this point, because 211 * eglQueryString(EGL_VERSION) is a property of the display, which we don't 212 * have yet. So you have to query for extensions no matter what. Fortunately 213 * epoxy_has_egl_extension _does_ let you query for client extensions, so 214 * we don't have to write our own extension string parsing. 215 * 216 * 4. There is no EGL_KHR_platform_base to complement the EXT one, thus one 217 * needs to know EGL 1.5 is supported in order to use the eglGetPlatformDisplay 218 * function pointer. 219 * We can workaround this (circular dependency) by probing for the EGL 1.5 220 * platform extensions (EGL_KHR_platform_gbm and friends) yet it doesn't seem 221 * like mesa will be able to advertise these (even though it can do EGL 1.5). 222 */ 223 static EGLDisplay qemu_egl_get_display(void *native) 224 { 225 EGLDisplay dpy = EGL_NO_DISPLAY; 226 227 #ifdef EGL_MESA_platform_gbm 228 /* In practise any EGL 1.5 implementation would support the EXT extension */ 229 if (epoxy_has_egl_extension(NULL, "EGL_EXT_platform_base")) { 230 PFNEGLGETPLATFORMDISPLAYEXTPROC getPlatformDisplayEXT = 231 (void *) eglGetProcAddress("eglGetPlatformDisplayEXT"); 232 if (getPlatformDisplayEXT) { 233 dpy = getPlatformDisplayEXT(EGL_PLATFORM_GBM_MESA, native, NULL); 234 } 235 } 236 #endif 237 238 if (dpy == EGL_NO_DISPLAY) { 239 /* fallback */ 240 dpy = eglGetDisplay(native); 241 } 242 return dpy; 243 } 244 245 int qemu_egl_init_dpy(EGLNativeDisplayType dpy, bool gles, bool debug) 246 { 247 static const EGLint conf_att_gl[] = { 248 EGL_SURFACE_TYPE, EGL_WINDOW_BIT, 249 EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT, 250 EGL_RED_SIZE, 5, 251 EGL_GREEN_SIZE, 5, 252 EGL_BLUE_SIZE, 5, 253 EGL_ALPHA_SIZE, 0, 254 EGL_NONE, 255 }; 256 static const EGLint conf_att_gles[] = { 257 EGL_SURFACE_TYPE, EGL_WINDOW_BIT, 258 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT, 259 EGL_RED_SIZE, 5, 260 EGL_GREEN_SIZE, 5, 261 EGL_BLUE_SIZE, 5, 262 EGL_ALPHA_SIZE, 0, 263 EGL_NONE, 264 }; 265 EGLint major, minor; 266 EGLBoolean b; 267 EGLint n; 268 269 if (debug) { 270 egl_debug = 1; 271 setenv("EGL_LOG_LEVEL", "debug", true); 272 setenv("LIBGL_DEBUG", "verbose", true); 273 } 274 275 egl_dbg("qemu_egl_get_display (dpy %p) ...\n", dpy); 276 qemu_egl_display = qemu_egl_get_display(dpy); 277 if (qemu_egl_display == EGL_NO_DISPLAY) { 278 error_report("egl: eglGetDisplay failed"); 279 return -1; 280 } 281 282 egl_dbg("eglInitialize ...\n"); 283 b = eglInitialize(qemu_egl_display, &major, &minor); 284 if (b == EGL_FALSE) { 285 error_report("egl: eglInitialize failed"); 286 return -1; 287 } 288 289 egl_dbg("eglBindAPI ...\n"); 290 b = eglBindAPI(gles ? EGL_OPENGL_ES_API : EGL_OPENGL_API); 291 if (b == EGL_FALSE) { 292 error_report("egl: eglBindAPI failed"); 293 return -1; 294 } 295 296 egl_dbg("eglChooseConfig ...\n"); 297 b = eglChooseConfig(qemu_egl_display, 298 gles ? conf_att_gles : conf_att_gl, 299 &qemu_egl_config, 1, &n); 300 if (b == EGL_FALSE || n != 1) { 301 error_report("egl: eglChooseConfig failed"); 302 return -1; 303 } 304 305 egl_gles = gles; 306 return 0; 307 } 308 309 EGLContext qemu_egl_init_ctx(void) 310 { 311 static const EGLint ctx_att_gl[] = { 312 EGL_NONE 313 }; 314 static const EGLint ctx_att_gles[] = { 315 EGL_CONTEXT_CLIENT_VERSION, 2, 316 EGL_NONE 317 }; 318 319 EGLContext ectx; 320 EGLBoolean b; 321 322 egl_dbg("eglCreateContext ...\n"); 323 ectx = eglCreateContext(qemu_egl_display, qemu_egl_config, EGL_NO_CONTEXT, 324 egl_gles ? ctx_att_gles : ctx_att_gl); 325 if (ectx == EGL_NO_CONTEXT) { 326 error_report("egl: eglCreateContext failed"); 327 return NULL; 328 } 329 330 b = eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, ectx); 331 if (b == EGL_FALSE) { 332 error_report("egl: eglMakeCurrent failed"); 333 return NULL; 334 } 335 336 return ectx; 337 } 338