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 { 205 EGLImageKHR image; 206 EGLint num_planes, fd; 207 208 image = eglCreateImageKHR(qemu_egl_display, eglGetCurrentContext(), 209 EGL_GL_TEXTURE_2D_KHR, 210 (EGLClientBuffer)(unsigned long)tex_id, 211 NULL); 212 if (!image) { 213 return -1; 214 } 215 216 eglExportDMABUFImageQueryMESA(qemu_egl_display, image, fourcc, 217 &num_planes, NULL); 218 if (num_planes != 1) { 219 eglDestroyImageKHR(qemu_egl_display, image); 220 return -1; 221 } 222 eglExportDMABUFImageMESA(qemu_egl_display, image, &fd, stride, NULL); 223 eglDestroyImageKHR(qemu_egl_display, image); 224 225 return fd; 226 } 227 228 void egl_dmabuf_import_texture(QemuDmaBuf *dmabuf) 229 { 230 EGLImageKHR image = EGL_NO_IMAGE_KHR; 231 EGLint attrs[] = { 232 EGL_DMA_BUF_PLANE0_FD_EXT, dmabuf->fd, 233 EGL_DMA_BUF_PLANE0_PITCH_EXT, dmabuf->stride, 234 EGL_DMA_BUF_PLANE0_OFFSET_EXT, 0, 235 EGL_WIDTH, dmabuf->width, 236 EGL_HEIGHT, dmabuf->height, 237 EGL_LINUX_DRM_FOURCC_EXT, dmabuf->fourcc, 238 EGL_NONE, /* end of list */ 239 }; 240 241 if (dmabuf->texture != 0) { 242 return; 243 } 244 245 image = eglCreateImageKHR(qemu_egl_display, 246 EGL_NO_CONTEXT, 247 EGL_LINUX_DMA_BUF_EXT, 248 NULL, attrs); 249 if (image == EGL_NO_IMAGE_KHR) { 250 error_report("eglCreateImageKHR failed"); 251 return; 252 } 253 254 glGenTextures(1, &dmabuf->texture); 255 glBindTexture(GL_TEXTURE_2D, dmabuf->texture); 256 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); 257 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); 258 259 glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, (GLeglImageOES)image); 260 eglDestroyImageKHR(qemu_egl_display, image); 261 } 262 263 void egl_dmabuf_release_texture(QemuDmaBuf *dmabuf) 264 { 265 if (dmabuf->texture == 0) { 266 return; 267 } 268 269 glDeleteTextures(1, &dmabuf->texture); 270 dmabuf->texture = 0; 271 } 272 273 #endif /* CONFIG_OPENGL_DMABUF */ 274 275 /* ---------------------------------------------------------------------- */ 276 277 EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, EGLNativeWindowType win) 278 { 279 EGLSurface esurface; 280 EGLBoolean b; 281 282 esurface = eglCreateWindowSurface(qemu_egl_display, 283 qemu_egl_config, 284 win, NULL); 285 if (esurface == EGL_NO_SURFACE) { 286 error_report("egl: eglCreateWindowSurface failed"); 287 return NULL; 288 } 289 290 b = eglMakeCurrent(qemu_egl_display, esurface, esurface, ectx); 291 if (b == EGL_FALSE) { 292 error_report("egl: eglMakeCurrent failed"); 293 return NULL; 294 } 295 296 return esurface; 297 } 298 299 /* ---------------------------------------------------------------------- */ 300 301 /* 302 * Taken from glamor_egl.h from the Xorg xserver, which is MIT licensed 303 * 304 * Create an EGLDisplay from a native display type. This is a little quirky 305 * for a few reasons. 306 * 307 * 1: GetPlatformDisplayEXT and GetPlatformDisplay are the API you want to 308 * use, but have different function signatures in the third argument; this 309 * happens not to matter for us, at the moment, but it means epoxy won't alias 310 * them together. 311 * 312 * 2: epoxy 1.3 and earlier don't understand EGL client extensions, which 313 * means you can't call "eglGetPlatformDisplayEXT" directly, as the resolver 314 * will crash. 315 * 316 * 3: You can't tell whether you have EGL 1.5 at this point, because 317 * eglQueryString(EGL_VERSION) is a property of the display, which we don't 318 * have yet. So you have to query for extensions no matter what. Fortunately 319 * epoxy_has_egl_extension _does_ let you query for client extensions, so 320 * we don't have to write our own extension string parsing. 321 * 322 * 4. There is no EGL_KHR_platform_base to complement the EXT one, thus one 323 * needs to know EGL 1.5 is supported in order to use the eglGetPlatformDisplay 324 * function pointer. 325 * We can workaround this (circular dependency) by probing for the EGL 1.5 326 * platform extensions (EGL_KHR_platform_gbm and friends) yet it doesn't seem 327 * like mesa will be able to advertise these (even though it can do EGL 1.5). 328 */ 329 static EGLDisplay qemu_egl_get_display(EGLNativeDisplayType native, 330 EGLenum platform) 331 { 332 EGLDisplay dpy = EGL_NO_DISPLAY; 333 334 /* In practise any EGL 1.5 implementation would support the EXT extension */ 335 if (epoxy_has_egl_extension(NULL, "EGL_EXT_platform_base")) { 336 PFNEGLGETPLATFORMDISPLAYEXTPROC getPlatformDisplayEXT = 337 (void *) eglGetProcAddress("eglGetPlatformDisplayEXT"); 338 if (getPlatformDisplayEXT && platform != 0) { 339 dpy = getPlatformDisplayEXT(platform, native, NULL); 340 } 341 } 342 343 if (dpy == EGL_NO_DISPLAY) { 344 /* fallback */ 345 dpy = eglGetDisplay(native); 346 } 347 return dpy; 348 } 349 350 static int qemu_egl_init_dpy(EGLNativeDisplayType dpy, 351 EGLenum platform, 352 DisplayGLMode mode) 353 { 354 static const EGLint conf_att_core[] = { 355 EGL_SURFACE_TYPE, EGL_WINDOW_BIT, 356 EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT, 357 EGL_RED_SIZE, 5, 358 EGL_GREEN_SIZE, 5, 359 EGL_BLUE_SIZE, 5, 360 EGL_ALPHA_SIZE, 0, 361 EGL_NONE, 362 }; 363 static const EGLint conf_att_gles[] = { 364 EGL_SURFACE_TYPE, EGL_WINDOW_BIT, 365 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT, 366 EGL_RED_SIZE, 5, 367 EGL_GREEN_SIZE, 5, 368 EGL_BLUE_SIZE, 5, 369 EGL_ALPHA_SIZE, 0, 370 EGL_NONE, 371 }; 372 EGLint major, minor; 373 EGLBoolean b; 374 EGLint n; 375 bool gles = (mode == DISPLAYGL_MODE_ES); 376 377 qemu_egl_display = qemu_egl_get_display(dpy, platform); 378 if (qemu_egl_display == EGL_NO_DISPLAY) { 379 error_report("egl: eglGetDisplay failed"); 380 return -1; 381 } 382 383 b = eglInitialize(qemu_egl_display, &major, &minor); 384 if (b == EGL_FALSE) { 385 error_report("egl: eglInitialize failed"); 386 return -1; 387 } 388 389 b = eglBindAPI(gles ? EGL_OPENGL_ES_API : EGL_OPENGL_API); 390 if (b == EGL_FALSE) { 391 error_report("egl: eglBindAPI failed (%s mode)", 392 gles ? "gles" : "core"); 393 return -1; 394 } 395 396 b = eglChooseConfig(qemu_egl_display, 397 gles ? conf_att_gles : conf_att_core, 398 &qemu_egl_config, 1, &n); 399 if (b == EGL_FALSE || n != 1) { 400 error_report("egl: eglChooseConfig failed (%s mode)", 401 gles ? "gles" : "core"); 402 return -1; 403 } 404 405 qemu_egl_mode = gles ? DISPLAYGL_MODE_ES : DISPLAYGL_MODE_CORE; 406 return 0; 407 } 408 409 int qemu_egl_init_dpy_x11(EGLNativeDisplayType dpy, DisplayGLMode mode) 410 { 411 #ifdef EGL_KHR_platform_x11 412 return qemu_egl_init_dpy(dpy, EGL_PLATFORM_X11_KHR, mode); 413 #else 414 return qemu_egl_init_dpy(dpy, 0, mode); 415 #endif 416 } 417 418 int qemu_egl_init_dpy_mesa(EGLNativeDisplayType dpy, DisplayGLMode mode) 419 { 420 #ifdef EGL_MESA_platform_gbm 421 return qemu_egl_init_dpy(dpy, EGL_PLATFORM_GBM_MESA, mode); 422 #else 423 return qemu_egl_init_dpy(dpy, 0, mode); 424 #endif 425 } 426 427 EGLContext qemu_egl_init_ctx(void) 428 { 429 static const EGLint ctx_att_core[] = { 430 EGL_CONTEXT_OPENGL_PROFILE_MASK, EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT, 431 EGL_NONE 432 }; 433 static const EGLint ctx_att_gles[] = { 434 EGL_CONTEXT_CLIENT_VERSION, 2, 435 EGL_NONE 436 }; 437 bool gles = (qemu_egl_mode == DISPLAYGL_MODE_ES); 438 EGLContext ectx; 439 EGLBoolean b; 440 441 ectx = eglCreateContext(qemu_egl_display, qemu_egl_config, EGL_NO_CONTEXT, 442 gles ? ctx_att_gles : ctx_att_core); 443 if (ectx == EGL_NO_CONTEXT) { 444 error_report("egl: eglCreateContext failed"); 445 return NULL; 446 } 447 448 b = eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, ectx); 449 if (b == EGL_FALSE) { 450 error_report("egl: eglMakeCurrent failed"); 451 return NULL; 452 } 453 454 return ectx; 455 } 456