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, double scale_x, double scale_y) 124 { 125 glBindFramebuffer(GL_FRAMEBUFFER_EXT, dst->framebuffer); 126 int w = scale_x * src->width; 127 int h = scale_y * src->height; 128 if (flip) { 129 glViewport(x, y, w, h); 130 } else { 131 glViewport(x, dst->height - h - y, w, h); 132 } 133 glEnable(GL_TEXTURE_2D); 134 glBindTexture(GL_TEXTURE_2D, src->texture); 135 glEnable(GL_BLEND); 136 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); 137 qemu_gl_run_texture_blit(gls, flip); 138 glDisable(GL_BLEND); 139 } 140 141 /* ---------------------------------------------------------------------- */ 142 143 #ifdef CONFIG_OPENGL_DMABUF 144 145 int qemu_egl_rn_fd; 146 struct gbm_device *qemu_egl_rn_gbm_dev; 147 EGLContext qemu_egl_rn_ctx; 148 149 int egl_rendernode_init(const char *rendernode, DisplayGLMode mode) 150 { 151 qemu_egl_rn_fd = -1; 152 int rc; 153 154 qemu_egl_rn_fd = qemu_drm_rendernode_open(rendernode); 155 if (qemu_egl_rn_fd == -1) { 156 error_report("egl: no drm render node available"); 157 goto err; 158 } 159 160 qemu_egl_rn_gbm_dev = gbm_create_device(qemu_egl_rn_fd); 161 if (!qemu_egl_rn_gbm_dev) { 162 error_report("egl: gbm_create_device failed"); 163 goto err; 164 } 165 166 rc = qemu_egl_init_dpy_mesa((EGLNativeDisplayType)qemu_egl_rn_gbm_dev, 167 mode); 168 if (rc != 0) { 169 /* qemu_egl_init_dpy_mesa reports error */ 170 goto err; 171 } 172 173 if (!epoxy_has_egl_extension(qemu_egl_display, 174 "EGL_KHR_surfaceless_context")) { 175 error_report("egl: EGL_KHR_surfaceless_context not supported"); 176 goto err; 177 } 178 if (!epoxy_has_egl_extension(qemu_egl_display, 179 "EGL_MESA_image_dma_buf_export")) { 180 error_report("egl: EGL_MESA_image_dma_buf_export not supported"); 181 goto err; 182 } 183 184 qemu_egl_rn_ctx = qemu_egl_init_ctx(); 185 if (!qemu_egl_rn_ctx) { 186 error_report("egl: egl_init_ctx failed"); 187 goto err; 188 } 189 190 return 0; 191 192 err: 193 if (qemu_egl_rn_gbm_dev) { 194 gbm_device_destroy(qemu_egl_rn_gbm_dev); 195 } 196 if (qemu_egl_rn_fd != -1) { 197 close(qemu_egl_rn_fd); 198 } 199 200 return -1; 201 } 202 203 int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc, 204 EGLuint64KHR *modifier) 205 { 206 EGLImageKHR image; 207 EGLint num_planes, fd; 208 209 image = eglCreateImageKHR(qemu_egl_display, eglGetCurrentContext(), 210 EGL_GL_TEXTURE_2D_KHR, 211 (EGLClientBuffer)(unsigned long)tex_id, 212 NULL); 213 if (!image) { 214 return -1; 215 } 216 217 eglExportDMABUFImageQueryMESA(qemu_egl_display, image, fourcc, 218 &num_planes, modifier); 219 if (num_planes != 1) { 220 eglDestroyImageKHR(qemu_egl_display, image); 221 return -1; 222 } 223 eglExportDMABUFImageMESA(qemu_egl_display, image, &fd, stride, NULL); 224 eglDestroyImageKHR(qemu_egl_display, image); 225 226 return fd; 227 } 228 229 void egl_dmabuf_import_texture(QemuDmaBuf *dmabuf) 230 { 231 EGLImageKHR image = EGL_NO_IMAGE_KHR; 232 EGLint attrs[64]; 233 int i = 0; 234 235 if (dmabuf->texture != 0) { 236 return; 237 } 238 239 attrs[i++] = EGL_WIDTH; 240 attrs[i++] = dmabuf->width; 241 attrs[i++] = EGL_HEIGHT; 242 attrs[i++] = dmabuf->height; 243 attrs[i++] = EGL_LINUX_DRM_FOURCC_EXT; 244 attrs[i++] = dmabuf->fourcc; 245 246 attrs[i++] = EGL_DMA_BUF_PLANE0_FD_EXT; 247 attrs[i++] = dmabuf->fd; 248 attrs[i++] = EGL_DMA_BUF_PLANE0_PITCH_EXT; 249 attrs[i++] = dmabuf->stride; 250 attrs[i++] = EGL_DMA_BUF_PLANE0_OFFSET_EXT; 251 attrs[i++] = 0; 252 #ifdef EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT 253 if (dmabuf->modifier) { 254 attrs[i++] = EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT; 255 attrs[i++] = (dmabuf->modifier >> 0) & 0xffffffff; 256 attrs[i++] = EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT; 257 attrs[i++] = (dmabuf->modifier >> 32) & 0xffffffff; 258 } 259 #endif 260 attrs[i++] = EGL_NONE; 261 262 image = eglCreateImageKHR(qemu_egl_display, 263 EGL_NO_CONTEXT, 264 EGL_LINUX_DMA_BUF_EXT, 265 NULL, attrs); 266 if (image == EGL_NO_IMAGE_KHR) { 267 error_report("eglCreateImageKHR failed"); 268 return; 269 } 270 271 glGenTextures(1, &dmabuf->texture); 272 glBindTexture(GL_TEXTURE_2D, dmabuf->texture); 273 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 274 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 275 276 glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, (GLeglImageOES)image); 277 eglDestroyImageKHR(qemu_egl_display, image); 278 } 279 280 void egl_dmabuf_release_texture(QemuDmaBuf *dmabuf) 281 { 282 if (dmabuf->texture == 0) { 283 return; 284 } 285 286 glDeleteTextures(1, &dmabuf->texture); 287 dmabuf->texture = 0; 288 } 289 290 #endif /* CONFIG_OPENGL_DMABUF */ 291 292 /* ---------------------------------------------------------------------- */ 293 294 EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, EGLNativeWindowType win) 295 { 296 EGLSurface esurface; 297 EGLBoolean b; 298 299 esurface = eglCreateWindowSurface(qemu_egl_display, 300 qemu_egl_config, 301 win, NULL); 302 if (esurface == EGL_NO_SURFACE) { 303 error_report("egl: eglCreateWindowSurface failed"); 304 return NULL; 305 } 306 307 b = eglMakeCurrent(qemu_egl_display, esurface, esurface, ectx); 308 if (b == EGL_FALSE) { 309 error_report("egl: eglMakeCurrent failed"); 310 return NULL; 311 } 312 313 return esurface; 314 } 315 316 /* ---------------------------------------------------------------------- */ 317 318 /* 319 * Taken from glamor_egl.h from the Xorg xserver, which is MIT licensed 320 * 321 * Create an EGLDisplay from a native display type. This is a little quirky 322 * for a few reasons. 323 * 324 * 1: GetPlatformDisplayEXT and GetPlatformDisplay are the API you want to 325 * use, but have different function signatures in the third argument; this 326 * happens not to matter for us, at the moment, but it means epoxy won't alias 327 * them together. 328 * 329 * 2: epoxy 1.3 and earlier don't understand EGL client extensions, which 330 * means you can't call "eglGetPlatformDisplayEXT" directly, as the resolver 331 * will crash. 332 * 333 * 3: You can't tell whether you have EGL 1.5 at this point, because 334 * eglQueryString(EGL_VERSION) is a property of the display, which we don't 335 * have yet. So you have to query for extensions no matter what. Fortunately 336 * epoxy_has_egl_extension _does_ let you query for client extensions, so 337 * we don't have to write our own extension string parsing. 338 * 339 * 4. There is no EGL_KHR_platform_base to complement the EXT one, thus one 340 * needs to know EGL 1.5 is supported in order to use the eglGetPlatformDisplay 341 * function pointer. 342 * We can workaround this (circular dependency) by probing for the EGL 1.5 343 * platform extensions (EGL_KHR_platform_gbm and friends) yet it doesn't seem 344 * like mesa will be able to advertise these (even though it can do EGL 1.5). 345 */ 346 static EGLDisplay qemu_egl_get_display(EGLNativeDisplayType native, 347 EGLenum platform) 348 { 349 EGLDisplay dpy = EGL_NO_DISPLAY; 350 351 /* In practise any EGL 1.5 implementation would support the EXT extension */ 352 if (epoxy_has_egl_extension(NULL, "EGL_EXT_platform_base")) { 353 PFNEGLGETPLATFORMDISPLAYEXTPROC getPlatformDisplayEXT = 354 (void *) eglGetProcAddress("eglGetPlatformDisplayEXT"); 355 if (getPlatformDisplayEXT && platform != 0) { 356 dpy = getPlatformDisplayEXT(platform, native, NULL); 357 } 358 } 359 360 if (dpy == EGL_NO_DISPLAY) { 361 /* fallback */ 362 dpy = eglGetDisplay(native); 363 } 364 return dpy; 365 } 366 367 static int qemu_egl_init_dpy(EGLNativeDisplayType dpy, 368 EGLenum platform, 369 DisplayGLMode mode) 370 { 371 static const EGLint conf_att_core[] = { 372 EGL_SURFACE_TYPE, EGL_WINDOW_BIT, 373 EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT, 374 EGL_RED_SIZE, 5, 375 EGL_GREEN_SIZE, 5, 376 EGL_BLUE_SIZE, 5, 377 EGL_ALPHA_SIZE, 0, 378 EGL_NONE, 379 }; 380 static const EGLint conf_att_gles[] = { 381 EGL_SURFACE_TYPE, EGL_WINDOW_BIT, 382 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT, 383 EGL_RED_SIZE, 5, 384 EGL_GREEN_SIZE, 5, 385 EGL_BLUE_SIZE, 5, 386 EGL_ALPHA_SIZE, 0, 387 EGL_NONE, 388 }; 389 EGLint major, minor; 390 EGLBoolean b; 391 EGLint n; 392 bool gles = (mode == DISPLAYGL_MODE_ES); 393 394 qemu_egl_display = qemu_egl_get_display(dpy, platform); 395 if (qemu_egl_display == EGL_NO_DISPLAY) { 396 error_report("egl: eglGetDisplay failed"); 397 return -1; 398 } 399 400 b = eglInitialize(qemu_egl_display, &major, &minor); 401 if (b == EGL_FALSE) { 402 error_report("egl: eglInitialize failed"); 403 return -1; 404 } 405 406 b = eglBindAPI(gles ? EGL_OPENGL_ES_API : EGL_OPENGL_API); 407 if (b == EGL_FALSE) { 408 error_report("egl: eglBindAPI failed (%s mode)", 409 gles ? "gles" : "core"); 410 return -1; 411 } 412 413 b = eglChooseConfig(qemu_egl_display, 414 gles ? conf_att_gles : conf_att_core, 415 &qemu_egl_config, 1, &n); 416 if (b == EGL_FALSE || n != 1) { 417 error_report("egl: eglChooseConfig failed (%s mode)", 418 gles ? "gles" : "core"); 419 return -1; 420 } 421 422 qemu_egl_mode = gles ? DISPLAYGL_MODE_ES : DISPLAYGL_MODE_CORE; 423 return 0; 424 } 425 426 int qemu_egl_init_dpy_x11(EGLNativeDisplayType dpy, DisplayGLMode mode) 427 { 428 #ifdef EGL_KHR_platform_x11 429 return qemu_egl_init_dpy(dpy, EGL_PLATFORM_X11_KHR, mode); 430 #else 431 return qemu_egl_init_dpy(dpy, 0, mode); 432 #endif 433 } 434 435 int qemu_egl_init_dpy_mesa(EGLNativeDisplayType dpy, DisplayGLMode mode) 436 { 437 #ifdef EGL_MESA_platform_gbm 438 return qemu_egl_init_dpy(dpy, EGL_PLATFORM_GBM_MESA, mode); 439 #else 440 return qemu_egl_init_dpy(dpy, 0, mode); 441 #endif 442 } 443 444 EGLContext qemu_egl_init_ctx(void) 445 { 446 static const EGLint ctx_att_core[] = { 447 EGL_CONTEXT_OPENGL_PROFILE_MASK, EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT, 448 EGL_NONE 449 }; 450 static const EGLint ctx_att_gles[] = { 451 EGL_CONTEXT_CLIENT_VERSION, 2, 452 EGL_NONE 453 }; 454 bool gles = (qemu_egl_mode == DISPLAYGL_MODE_ES); 455 EGLContext ectx; 456 EGLBoolean b; 457 458 ectx = eglCreateContext(qemu_egl_display, qemu_egl_config, EGL_NO_CONTEXT, 459 gles ? ctx_att_gles : ctx_att_core); 460 if (ectx == EGL_NO_CONTEXT) { 461 error_report("egl: eglCreateContext failed"); 462 return NULL; 463 } 464 465 b = eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, ectx); 466 if (b == EGL_FALSE) { 467 error_report("egl: eglMakeCurrent failed"); 468 return NULL; 469 } 470 471 return ectx; 472 } 473