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 #ifdef CONFIG_OPENGL_DMABUF 30 31 int qemu_egl_rn_fd; 32 struct gbm_device *qemu_egl_rn_gbm_dev; 33 EGLContext qemu_egl_rn_ctx; 34 35 static int qemu_egl_rendernode_open(const char *rendernode) 36 { 37 DIR *dir; 38 struct dirent *e; 39 int r, fd; 40 char *p; 41 42 if (rendernode) { 43 return open(rendernode, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK); 44 } 45 46 dir = opendir("/dev/dri"); 47 if (!dir) { 48 return -1; 49 } 50 51 fd = -1; 52 while ((e = readdir(dir))) { 53 if (e->d_type != DT_CHR) { 54 continue; 55 } 56 57 if (strncmp(e->d_name, "renderD", 7)) { 58 continue; 59 } 60 61 p = g_strdup_printf("/dev/dri/%s", e->d_name); 62 63 r = open(p, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK); 64 if (r < 0) { 65 g_free(p); 66 continue; 67 } 68 fd = r; 69 g_free(p); 70 break; 71 } 72 73 closedir(dir); 74 if (fd < 0) { 75 return -1; 76 } 77 return fd; 78 } 79 80 int egl_rendernode_init(const char *rendernode) 81 { 82 qemu_egl_rn_fd = -1; 83 int rc; 84 85 qemu_egl_rn_fd = qemu_egl_rendernode_open(rendernode); 86 if (qemu_egl_rn_fd == -1) { 87 error_report("egl: no drm render node available"); 88 goto err; 89 } 90 91 qemu_egl_rn_gbm_dev = gbm_create_device(qemu_egl_rn_fd); 92 if (!qemu_egl_rn_gbm_dev) { 93 error_report("egl: gbm_create_device failed"); 94 goto err; 95 } 96 97 rc = qemu_egl_init_dpy_mesa((EGLNativeDisplayType)qemu_egl_rn_gbm_dev); 98 if (rc != 0) { 99 /* qemu_egl_init_dpy_mesa reports error */ 100 goto err; 101 } 102 103 if (!epoxy_has_egl_extension(qemu_egl_display, 104 "EGL_KHR_surfaceless_context")) { 105 error_report("egl: EGL_KHR_surfaceless_context not supported"); 106 goto err; 107 } 108 if (!epoxy_has_egl_extension(qemu_egl_display, 109 "EGL_MESA_image_dma_buf_export")) { 110 error_report("egl: EGL_MESA_image_dma_buf_export not supported"); 111 goto err; 112 } 113 114 qemu_egl_rn_ctx = qemu_egl_init_ctx(); 115 if (!qemu_egl_rn_ctx) { 116 error_report("egl: egl_init_ctx failed"); 117 goto err; 118 } 119 120 return 0; 121 122 err: 123 if (qemu_egl_rn_gbm_dev) { 124 gbm_device_destroy(qemu_egl_rn_gbm_dev); 125 } 126 if (qemu_egl_rn_fd != -1) { 127 close(qemu_egl_rn_fd); 128 } 129 130 return -1; 131 } 132 133 int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc) 134 { 135 EGLImageKHR image; 136 EGLint num_planes, fd; 137 138 image = eglCreateImageKHR(qemu_egl_display, eglGetCurrentContext(), 139 EGL_GL_TEXTURE_2D_KHR, 140 (EGLClientBuffer)(unsigned long)tex_id, 141 NULL); 142 if (!image) { 143 return -1; 144 } 145 146 eglExportDMABUFImageQueryMESA(qemu_egl_display, image, fourcc, 147 &num_planes, NULL); 148 if (num_planes != 1) { 149 eglDestroyImageKHR(qemu_egl_display, image); 150 return -1; 151 } 152 eglExportDMABUFImageMESA(qemu_egl_display, image, &fd, stride, NULL); 153 eglDestroyImageKHR(qemu_egl_display, image); 154 155 return fd; 156 } 157 158 #endif /* CONFIG_OPENGL_DMABUF */ 159 160 /* ---------------------------------------------------------------------- */ 161 162 EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, Window win) 163 { 164 EGLSurface esurface; 165 EGLBoolean b; 166 167 esurface = eglCreateWindowSurface(qemu_egl_display, 168 qemu_egl_config, 169 (EGLNativeWindowType)win, NULL); 170 if (esurface == EGL_NO_SURFACE) { 171 error_report("egl: eglCreateWindowSurface failed"); 172 return NULL; 173 } 174 175 b = eglMakeCurrent(qemu_egl_display, esurface, esurface, ectx); 176 if (b == EGL_FALSE) { 177 error_report("egl: eglMakeCurrent failed"); 178 return NULL; 179 } 180 181 return esurface; 182 } 183 184 /* ---------------------------------------------------------------------- */ 185 186 /* 187 * Taken from glamor_egl.h from the Xorg xserver, which is MIT licensed 188 * 189 * Create an EGLDisplay from a native display type. This is a little quirky 190 * for a few reasons. 191 * 192 * 1: GetPlatformDisplayEXT and GetPlatformDisplay are the API you want to 193 * use, but have different function signatures in the third argument; this 194 * happens not to matter for us, at the moment, but it means epoxy won't alias 195 * them together. 196 * 197 * 2: epoxy 1.3 and earlier don't understand EGL client extensions, which 198 * means you can't call "eglGetPlatformDisplayEXT" directly, as the resolver 199 * will crash. 200 * 201 * 3: You can't tell whether you have EGL 1.5 at this point, because 202 * eglQueryString(EGL_VERSION) is a property of the display, which we don't 203 * have yet. So you have to query for extensions no matter what. Fortunately 204 * epoxy_has_egl_extension _does_ let you query for client extensions, so 205 * we don't have to write our own extension string parsing. 206 * 207 * 4. There is no EGL_KHR_platform_base to complement the EXT one, thus one 208 * needs to know EGL 1.5 is supported in order to use the eglGetPlatformDisplay 209 * function pointer. 210 * We can workaround this (circular dependency) by probing for the EGL 1.5 211 * platform extensions (EGL_KHR_platform_gbm and friends) yet it doesn't seem 212 * like mesa will be able to advertise these (even though it can do EGL 1.5). 213 */ 214 static EGLDisplay qemu_egl_get_display(EGLNativeDisplayType native, 215 EGLenum platform) 216 { 217 EGLDisplay dpy = EGL_NO_DISPLAY; 218 219 /* In practise any EGL 1.5 implementation would support the EXT extension */ 220 if (epoxy_has_egl_extension(NULL, "EGL_EXT_platform_base")) { 221 PFNEGLGETPLATFORMDISPLAYEXTPROC getPlatformDisplayEXT = 222 (void *) eglGetProcAddress("eglGetPlatformDisplayEXT"); 223 if (getPlatformDisplayEXT && platform != 0) { 224 dpy = getPlatformDisplayEXT(platform, native, NULL); 225 } 226 } 227 228 if (dpy == EGL_NO_DISPLAY) { 229 /* fallback */ 230 dpy = eglGetDisplay(native); 231 } 232 return dpy; 233 } 234 235 static int qemu_egl_init_dpy(EGLNativeDisplayType dpy, 236 EGLenum platform) 237 { 238 static const EGLint conf_att_gl[] = { 239 EGL_SURFACE_TYPE, EGL_WINDOW_BIT, 240 EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT, 241 EGL_RED_SIZE, 5, 242 EGL_GREEN_SIZE, 5, 243 EGL_BLUE_SIZE, 5, 244 EGL_ALPHA_SIZE, 0, 245 EGL_NONE, 246 }; 247 EGLint major, minor; 248 EGLBoolean b; 249 EGLint n; 250 251 qemu_egl_display = qemu_egl_get_display(dpy, platform); 252 if (qemu_egl_display == EGL_NO_DISPLAY) { 253 error_report("egl: eglGetDisplay failed"); 254 return -1; 255 } 256 257 b = eglInitialize(qemu_egl_display, &major, &minor); 258 if (b == EGL_FALSE) { 259 error_report("egl: eglInitialize failed"); 260 return -1; 261 } 262 263 b = eglBindAPI(EGL_OPENGL_API); 264 if (b == EGL_FALSE) { 265 error_report("egl: eglBindAPI failed"); 266 return -1; 267 } 268 269 b = eglChooseConfig(qemu_egl_display, conf_att_gl, 270 &qemu_egl_config, 1, &n); 271 if (b == EGL_FALSE || n != 1) { 272 error_report("egl: eglChooseConfig failed"); 273 return -1; 274 } 275 return 0; 276 } 277 278 int qemu_egl_init_dpy_x11(EGLNativeDisplayType dpy) 279 { 280 #ifdef EGL_KHR_platform_x11 281 return qemu_egl_init_dpy(dpy, EGL_PLATFORM_X11_KHR); 282 #else 283 return qemu_egl_init_dpy(dpy, 0); 284 #endif 285 } 286 287 int qemu_egl_init_dpy_mesa(EGLNativeDisplayType dpy) 288 { 289 #ifdef EGL_MESA_platform_gbm 290 return qemu_egl_init_dpy(dpy, EGL_PLATFORM_GBM_MESA); 291 #else 292 return qemu_egl_init_dpy(dpy, 0); 293 #endif 294 } 295 296 EGLContext qemu_egl_init_ctx(void) 297 { 298 static const EGLint ctx_att_gl[] = { 299 EGL_CONTEXT_OPENGL_PROFILE_MASK, EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT, 300 EGL_NONE 301 }; 302 EGLContext ectx; 303 EGLBoolean b; 304 305 ectx = eglCreateContext(qemu_egl_display, qemu_egl_config, EGL_NO_CONTEXT, 306 ctx_att_gl); 307 if (ectx == EGL_NO_CONTEXT) { 308 error_report("egl: eglCreateContext failed"); 309 return NULL; 310 } 311 312 b = eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, ectx); 313 if (b == EGL_FALSE) { 314 error_report("egl: eglMakeCurrent failed"); 315 return NULL; 316 } 317 318 return ectx; 319 } 320