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 "qemu/drm.h" 19 #include "qemu/error-report.h" 20 #include "ui/console.h" 21 #include "ui/egl-helpers.h" 22 23 EGLDisplay *qemu_egl_display; 24 EGLConfig qemu_egl_config; 25 DisplayGLMode qemu_egl_mode; 26 27 /* ------------------------------------------------------------------ */ 28 29 static void egl_fb_delete_texture(egl_fb *fb) 30 { 31 if (!fb->delete_texture) { 32 return; 33 } 34 35 glDeleteTextures(1, &fb->texture); 36 fb->delete_texture = false; 37 } 38 39 void egl_fb_destroy(egl_fb *fb) 40 { 41 if (!fb->framebuffer) { 42 return; 43 } 44 45 egl_fb_delete_texture(fb); 46 glDeleteFramebuffers(1, &fb->framebuffer); 47 48 fb->width = 0; 49 fb->height = 0; 50 fb->texture = 0; 51 fb->framebuffer = 0; 52 } 53 54 void egl_fb_setup_default(egl_fb *fb, int width, int height) 55 { 56 fb->width = width; 57 fb->height = height; 58 fb->framebuffer = 0; /* default framebuffer */ 59 } 60 61 void egl_fb_setup_for_tex(egl_fb *fb, int width, int height, 62 GLuint texture, bool delete) 63 { 64 egl_fb_delete_texture(fb); 65 66 fb->width = width; 67 fb->height = height; 68 fb->texture = texture; 69 fb->delete_texture = delete; 70 if (!fb->framebuffer) { 71 glGenFramebuffers(1, &fb->framebuffer); 72 } 73 74 glBindFramebuffer(GL_FRAMEBUFFER_EXT, fb->framebuffer); 75 glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, 76 GL_TEXTURE_2D, fb->texture, 0); 77 } 78 79 void egl_fb_setup_new_tex(egl_fb *fb, int width, int height) 80 { 81 GLuint texture; 82 83 glGenTextures(1, &texture); 84 glBindTexture(GL_TEXTURE_2D, texture); 85 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 86 0, GL_BGRA, GL_UNSIGNED_BYTE, 0); 87 88 egl_fb_setup_for_tex(fb, width, height, texture, true); 89 } 90 91 void egl_fb_blit(egl_fb *dst, egl_fb *src, bool flip) 92 { 93 GLuint y1, y2; 94 95 glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer); 96 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, dst->framebuffer); 97 glViewport(0, 0, dst->width, dst->height); 98 y1 = flip ? src->height : 0; 99 y2 = flip ? 0 : src->height; 100 glBlitFramebuffer(0, y1, src->width, y2, 101 0, 0, dst->width, dst->height, 102 GL_COLOR_BUFFER_BIT, GL_LINEAR); 103 } 104 105 void egl_fb_read(void *dst, egl_fb *src) 106 { 107 glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer); 108 glReadBuffer(GL_COLOR_ATTACHMENT0_EXT); 109 glReadPixels(0, 0, src->width, src->height, 110 GL_BGRA, GL_UNSIGNED_BYTE, dst); 111 } 112 113 void egl_texture_blit(QemuGLShader *gls, egl_fb *dst, egl_fb *src, bool flip) 114 { 115 glBindFramebuffer(GL_FRAMEBUFFER_EXT, dst->framebuffer); 116 glViewport(0, 0, dst->width, dst->height); 117 glEnable(GL_TEXTURE_2D); 118 glBindTexture(GL_TEXTURE_2D, src->texture); 119 qemu_gl_run_texture_blit(gls, flip); 120 } 121 122 void egl_texture_blend(QemuGLShader *gls, egl_fb *dst, egl_fb *src, bool flip, 123 int x, int y) 124 { 125 glBindFramebuffer(GL_FRAMEBUFFER_EXT, dst->framebuffer); 126 if (flip) { 127 glViewport(x, y, src->width, src->height); 128 } else { 129 glViewport(x, dst->height - src->height - y, 130 src->width, src->height); 131 } 132 glEnable(GL_TEXTURE_2D); 133 glBindTexture(GL_TEXTURE_2D, src->texture); 134 glEnable(GL_BLEND); 135 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); 136 qemu_gl_run_texture_blit(gls, flip); 137 glDisable(GL_BLEND); 138 } 139 140 /* ---------------------------------------------------------------------- */ 141 142 #ifdef CONFIG_OPENGL_DMABUF 143 144 int qemu_egl_rn_fd; 145 struct gbm_device *qemu_egl_rn_gbm_dev; 146 EGLContext qemu_egl_rn_ctx; 147 148 int egl_rendernode_init(const char *rendernode, DisplayGLMode mode) 149 { 150 qemu_egl_rn_fd = -1; 151 int rc; 152 153 qemu_egl_rn_fd = qemu_drm_rendernode_open(rendernode); 154 if (qemu_egl_rn_fd == -1) { 155 error_report("egl: no drm render node available"); 156 goto err; 157 } 158 159 qemu_egl_rn_gbm_dev = gbm_create_device(qemu_egl_rn_fd); 160 if (!qemu_egl_rn_gbm_dev) { 161 error_report("egl: gbm_create_device failed"); 162 goto err; 163 } 164 165 rc = qemu_egl_init_dpy_mesa((EGLNativeDisplayType)qemu_egl_rn_gbm_dev, 166 mode); 167 if (rc != 0) { 168 /* qemu_egl_init_dpy_mesa reports error */ 169 goto err; 170 } 171 172 if (!epoxy_has_egl_extension(qemu_egl_display, 173 "EGL_KHR_surfaceless_context")) { 174 error_report("egl: EGL_KHR_surfaceless_context not supported"); 175 goto err; 176 } 177 if (!epoxy_has_egl_extension(qemu_egl_display, 178 "EGL_MESA_image_dma_buf_export")) { 179 error_report("egl: EGL_MESA_image_dma_buf_export not supported"); 180 goto err; 181 } 182 183 qemu_egl_rn_ctx = qemu_egl_init_ctx(); 184 if (!qemu_egl_rn_ctx) { 185 error_report("egl: egl_init_ctx failed"); 186 goto err; 187 } 188 189 return 0; 190 191 err: 192 if (qemu_egl_rn_gbm_dev) { 193 gbm_device_destroy(qemu_egl_rn_gbm_dev); 194 } 195 if (qemu_egl_rn_fd != -1) { 196 close(qemu_egl_rn_fd); 197 } 198 199 return -1; 200 } 201 202 int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc) 203 { 204 EGLImageKHR image; 205 EGLint num_planes, fd; 206 207 image = eglCreateImageKHR(qemu_egl_display, eglGetCurrentContext(), 208 EGL_GL_TEXTURE_2D_KHR, 209 (EGLClientBuffer)(unsigned long)tex_id, 210 NULL); 211 if (!image) { 212 return -1; 213 } 214 215 eglExportDMABUFImageQueryMESA(qemu_egl_display, image, fourcc, 216 &num_planes, NULL); 217 if (num_planes != 1) { 218 eglDestroyImageKHR(qemu_egl_display, image); 219 return -1; 220 } 221 eglExportDMABUFImageMESA(qemu_egl_display, image, &fd, stride, NULL); 222 eglDestroyImageKHR(qemu_egl_display, image); 223 224 return fd; 225 } 226 227 void egl_dmabuf_import_texture(QemuDmaBuf *dmabuf) 228 { 229 EGLImageKHR image = EGL_NO_IMAGE_KHR; 230 EGLint attrs[] = { 231 EGL_DMA_BUF_PLANE0_FD_EXT, dmabuf->fd, 232 EGL_DMA_BUF_PLANE0_PITCH_EXT, dmabuf->stride, 233 EGL_DMA_BUF_PLANE0_OFFSET_EXT, 0, 234 EGL_WIDTH, dmabuf->width, 235 EGL_HEIGHT, dmabuf->height, 236 EGL_LINUX_DRM_FOURCC_EXT, dmabuf->fourcc, 237 EGL_NONE, /* end of list */ 238 }; 239 240 if (dmabuf->texture != 0) { 241 return; 242 } 243 244 image = eglCreateImageKHR(qemu_egl_display, 245 EGL_NO_CONTEXT, 246 EGL_LINUX_DMA_BUF_EXT, 247 NULL, attrs); 248 if (image == EGL_NO_IMAGE_KHR) { 249 error_report("eglCreateImageKHR failed"); 250 return; 251 } 252 253 glGenTextures(1, &dmabuf->texture); 254 glBindTexture(GL_TEXTURE_2D, dmabuf->texture); 255 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 256 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 257 258 glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, (GLeglImageOES)image); 259 eglDestroyImageKHR(qemu_egl_display, image); 260 } 261 262 void egl_dmabuf_release_texture(QemuDmaBuf *dmabuf) 263 { 264 if (dmabuf->texture == 0) { 265 return; 266 } 267 268 glDeleteTextures(1, &dmabuf->texture); 269 dmabuf->texture = 0; 270 } 271 272 #endif /* CONFIG_OPENGL_DMABUF */ 273 274 /* ---------------------------------------------------------------------- */ 275 276 EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, EGLNativeWindowType win) 277 { 278 EGLSurface esurface; 279 EGLBoolean b; 280 281 esurface = eglCreateWindowSurface(qemu_egl_display, 282 qemu_egl_config, 283 win, NULL); 284 if (esurface == EGL_NO_SURFACE) { 285 error_report("egl: eglCreateWindowSurface failed"); 286 return NULL; 287 } 288 289 b = eglMakeCurrent(qemu_egl_display, esurface, esurface, ectx); 290 if (b == EGL_FALSE) { 291 error_report("egl: eglMakeCurrent failed"); 292 return NULL; 293 } 294 295 return esurface; 296 } 297 298 /* ---------------------------------------------------------------------- */ 299 300 /* 301 * Taken from glamor_egl.h from the Xorg xserver, which is MIT licensed 302 * 303 * Create an EGLDisplay from a native display type. This is a little quirky 304 * for a few reasons. 305 * 306 * 1: GetPlatformDisplayEXT and GetPlatformDisplay are the API you want to 307 * use, but have different function signatures in the third argument; this 308 * happens not to matter for us, at the moment, but it means epoxy won't alias 309 * them together. 310 * 311 * 2: epoxy 1.3 and earlier don't understand EGL client extensions, which 312 * means you can't call "eglGetPlatformDisplayEXT" directly, as the resolver 313 * will crash. 314 * 315 * 3: You can't tell whether you have EGL 1.5 at this point, because 316 * eglQueryString(EGL_VERSION) is a property of the display, which we don't 317 * have yet. So you have to query for extensions no matter what. Fortunately 318 * epoxy_has_egl_extension _does_ let you query for client extensions, so 319 * we don't have to write our own extension string parsing. 320 * 321 * 4. There is no EGL_KHR_platform_base to complement the EXT one, thus one 322 * needs to know EGL 1.5 is supported in order to use the eglGetPlatformDisplay 323 * function pointer. 324 * We can workaround this (circular dependency) by probing for the EGL 1.5 325 * platform extensions (EGL_KHR_platform_gbm and friends) yet it doesn't seem 326 * like mesa will be able to advertise these (even though it can do EGL 1.5). 327 */ 328 static EGLDisplay qemu_egl_get_display(EGLNativeDisplayType native, 329 EGLenum platform) 330 { 331 EGLDisplay dpy = EGL_NO_DISPLAY; 332 333 /* In practise any EGL 1.5 implementation would support the EXT extension */ 334 if (epoxy_has_egl_extension(NULL, "EGL_EXT_platform_base")) { 335 PFNEGLGETPLATFORMDISPLAYEXTPROC getPlatformDisplayEXT = 336 (void *) eglGetProcAddress("eglGetPlatformDisplayEXT"); 337 if (getPlatformDisplayEXT && platform != 0) { 338 dpy = getPlatformDisplayEXT(platform, native, NULL); 339 } 340 } 341 342 if (dpy == EGL_NO_DISPLAY) { 343 /* fallback */ 344 dpy = eglGetDisplay(native); 345 } 346 return dpy; 347 } 348 349 static int qemu_egl_init_dpy(EGLNativeDisplayType dpy, 350 EGLenum platform, 351 DisplayGLMode mode) 352 { 353 static const EGLint conf_att_core[] = { 354 EGL_SURFACE_TYPE, EGL_WINDOW_BIT, 355 EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT, 356 EGL_RED_SIZE, 5, 357 EGL_GREEN_SIZE, 5, 358 EGL_BLUE_SIZE, 5, 359 EGL_ALPHA_SIZE, 0, 360 EGL_NONE, 361 }; 362 static const EGLint conf_att_gles[] = { 363 EGL_SURFACE_TYPE, EGL_WINDOW_BIT, 364 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT, 365 EGL_RED_SIZE, 5, 366 EGL_GREEN_SIZE, 5, 367 EGL_BLUE_SIZE, 5, 368 EGL_ALPHA_SIZE, 0, 369 EGL_NONE, 370 }; 371 EGLint major, minor; 372 EGLBoolean b; 373 EGLint n; 374 bool gles = (mode == DISPLAYGL_MODE_ES); 375 376 qemu_egl_display = qemu_egl_get_display(dpy, platform); 377 if (qemu_egl_display == EGL_NO_DISPLAY) { 378 error_report("egl: eglGetDisplay failed"); 379 return -1; 380 } 381 382 b = eglInitialize(qemu_egl_display, &major, &minor); 383 if (b == EGL_FALSE) { 384 error_report("egl: eglInitialize failed"); 385 return -1; 386 } 387 388 b = eglBindAPI(gles ? EGL_OPENGL_ES_API : EGL_OPENGL_API); 389 if (b == EGL_FALSE) { 390 error_report("egl: eglBindAPI failed (%s mode)", 391 gles ? "gles" : "core"); 392 return -1; 393 } 394 395 b = eglChooseConfig(qemu_egl_display, 396 gles ? conf_att_gles : conf_att_core, 397 &qemu_egl_config, 1, &n); 398 if (b == EGL_FALSE || n != 1) { 399 error_report("egl: eglChooseConfig failed (%s mode)", 400 gles ? "gles" : "core"); 401 return -1; 402 } 403 404 qemu_egl_mode = gles ? DISPLAYGL_MODE_ES : DISPLAYGL_MODE_CORE; 405 return 0; 406 } 407 408 int qemu_egl_init_dpy_x11(EGLNativeDisplayType dpy, DisplayGLMode mode) 409 { 410 #ifdef EGL_KHR_platform_x11 411 return qemu_egl_init_dpy(dpy, EGL_PLATFORM_X11_KHR, mode); 412 #else 413 return qemu_egl_init_dpy(dpy, 0, mode); 414 #endif 415 } 416 417 int qemu_egl_init_dpy_mesa(EGLNativeDisplayType dpy, DisplayGLMode mode) 418 { 419 #ifdef EGL_MESA_platform_gbm 420 return qemu_egl_init_dpy(dpy, EGL_PLATFORM_GBM_MESA, mode); 421 #else 422 return qemu_egl_init_dpy(dpy, 0, mode); 423 #endif 424 } 425 426 EGLContext qemu_egl_init_ctx(void) 427 { 428 static const EGLint ctx_att_core[] = { 429 EGL_CONTEXT_OPENGL_PROFILE_MASK, EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT, 430 EGL_NONE 431 }; 432 static const EGLint ctx_att_gles[] = { 433 EGL_CONTEXT_CLIENT_VERSION, 2, 434 EGL_NONE 435 }; 436 bool gles = (qemu_egl_mode == DISPLAYGL_MODE_ES); 437 EGLContext ectx; 438 EGLBoolean b; 439 440 ectx = eglCreateContext(qemu_egl_display, qemu_egl_config, EGL_NO_CONTEXT, 441 gles ? ctx_att_gles : ctx_att_core); 442 if (ectx == EGL_NO_CONTEXT) { 443 error_report("egl: eglCreateContext failed"); 444 return NULL; 445 } 446 447 b = eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, ectx); 448 if (b == EGL_FALSE) { 449 error_report("egl: eglMakeCurrent failed"); 450 return NULL; 451 } 452 453 return ectx; 454 } 455