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383 lines
10 KiB
383 lines
10 KiB
/**************************************************************************
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*
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* Copyright (C) 2014 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/* create our own EGL offscreen rendering context via gbm and rendernodes */
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/* if we are using EGL and rendernodes then we talk via file descriptors to the remote
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node */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#define EGL_EGLEXT_PROTOTYPES
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#include <dirent.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <epoxy/egl.h>
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#include <gbm.h>
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#include <xf86drm.h>
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#include "virglrenderer.h"
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#include "virgl_egl.h"
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#include "virgl_hw.h"
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struct virgl_egl {
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int fd;
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struct gbm_device *gbm_dev;
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EGLDisplay egl_display;
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EGLConfig egl_conf;
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EGLContext egl_ctx;
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bool have_mesa_drm_image;
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bool have_mesa_dma_buf_img_export;
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};
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static int egl_rendernode_open(void)
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{
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DIR *dir;
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struct dirent *e;
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int r, fd;
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char *p;
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dir = opendir("/dev/dri");
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if (!dir)
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return -1;
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fd = -1;
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while ((e = readdir(dir))) {
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if (e->d_type != DT_CHR)
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continue;
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if (strncmp(e->d_name, "renderD", 7))
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continue;
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r = asprintf(&p, "/dev/dri/%s", e->d_name);
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if (r < 0)
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return -1;
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r = open(p, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
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if (r < 0){
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free(p);
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continue;
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}
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fd = r;
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free(p);
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break;
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}
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closedir(dir);
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if (fd < 0)
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return -1;
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return fd;
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}
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static bool virgl_egl_has_extension_in_string(const char *haystack, const char *needle)
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{
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const unsigned needle_len = strlen(needle);
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if (needle_len == 0)
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return false;
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while (true) {
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const char *const s = strstr(haystack, needle);
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if (s == NULL)
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return false;
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if (s[needle_len] == ' ' || s[needle_len] == '\0') {
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return true;
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}
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/* strstr found an extension whose name begins with
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* needle, but whose name is not equal to needle.
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* Restart the search at s + needle_len so that we
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* don't just find the same extension again and go
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* into an infinite loop.
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*/
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haystack = s + needle_len;
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}
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return false;
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}
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struct virgl_egl *virgl_egl_init(void)
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{
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static const EGLint conf_att[] = {
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EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
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EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
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EGL_RED_SIZE, 1,
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EGL_GREEN_SIZE, 1,
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EGL_BLUE_SIZE, 1,
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EGL_ALPHA_SIZE, 0,
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EGL_NONE,
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};
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static const EGLint ctx_att[] = {
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EGL_CONTEXT_CLIENT_VERSION, 2,
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EGL_NONE
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};
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EGLBoolean b;
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EGLenum api;
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EGLint major, minor, n;
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const char *extension_list;
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struct virgl_egl *d;
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d = malloc(sizeof(struct virgl_egl));
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if (!d)
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return NULL;
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d->fd = egl_rendernode_open();
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if (d->fd == -1)
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goto fail;
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d->gbm_dev = gbm_create_device(d->fd);
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if (!d->gbm_dev)
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goto fail;
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const char *client_extensions = eglQueryString (NULL, EGL_EXTENSIONS);
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if (strstr (client_extensions, "EGL_KHR_platform_base")) {
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PFNEGLGETPLATFORMDISPLAYEXTPROC get_platform_display =
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(PFNEGLGETPLATFORMDISPLAYEXTPROC) eglGetProcAddress ("eglGetPlatformDisplay");
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if (get_platform_display)
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d->egl_display = get_platform_display (EGL_PLATFORM_GBM_KHR,
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(EGLNativeDisplayType)d->gbm_dev, NULL);
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} else if (strstr (client_extensions, "EGL_EXT_platform_base")) {
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PFNEGLGETPLATFORMDISPLAYEXTPROC get_platform_display =
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(PFNEGLGETPLATFORMDISPLAYEXTPROC) eglGetProcAddress ("eglGetPlatformDisplayEXT");
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if (get_platform_display)
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d->egl_display = get_platform_display (EGL_PLATFORM_GBM_KHR,
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(EGLNativeDisplayType)d->gbm_dev, NULL);
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} else {
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d->egl_display = eglGetDisplay((EGLNativeDisplayType)d->gbm_dev);
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}
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if (!d->egl_display)
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goto fail;
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b = eglInitialize(d->egl_display, &major, &minor);
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if (!b)
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goto fail;
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extension_list = eglQueryString(d->egl_display, EGL_EXTENSIONS);
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#ifdef VIRGL_EGL_DEBUG
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fprintf(stderr, "EGL major/minor: %d.%d\n", major, minor);
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fprintf(stderr, "EGL version: %s\n",
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eglQueryString(d->egl_display, EGL_VERSION));
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fprintf(stderr, "EGL vendor: %s\n",
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eglQueryString(d->egl_display, EGL_VENDOR));
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fprintf(stderr, "EGL extensions: %s\n", extension_list);
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#endif
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/* require surfaceless context */
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if (!virgl_egl_has_extension_in_string(extension_list, "EGL_KHR_surfaceless_context"))
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goto fail;
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d->have_mesa_drm_image = false;
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d->have_mesa_dma_buf_img_export = false;
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if (virgl_egl_has_extension_in_string(extension_list, "EGL_MESA_drm_image"))
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d->have_mesa_drm_image = true;
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if (virgl_egl_has_extension_in_string(extension_list, "EGL_MESA_image_dma_buf_export"))
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d->have_mesa_dma_buf_img_export = true;
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if (d->have_mesa_drm_image == false && d->have_mesa_dma_buf_img_export == false) {
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fprintf(stderr, "failed to find drm image extensions\n");
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goto fail;
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}
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api = EGL_OPENGL_API;
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b = eglBindAPI(api);
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if (!b)
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goto fail;
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b = eglChooseConfig(d->egl_display, conf_att, &d->egl_conf,
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1, &n);
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if (!b || n != 1)
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goto fail;
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d->egl_ctx = eglCreateContext(d->egl_display,
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d->egl_conf,
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EGL_NO_CONTEXT,
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ctx_att);
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if (!d->egl_ctx)
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goto fail;
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eglMakeCurrent(d->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
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d->egl_ctx);
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return d;
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fail:
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free(d);
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return NULL;
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}
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void virgl_egl_destroy(struct virgl_egl *d)
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{
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eglMakeCurrent(d->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
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EGL_NO_CONTEXT);
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eglDestroyContext(d->egl_display, d->egl_ctx);
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eglTerminate(d->egl_display);
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gbm_device_destroy(d->gbm_dev);
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close(d->fd);
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free(d);
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}
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virgl_renderer_gl_context virgl_egl_create_context(struct virgl_egl *ve, struct virgl_gl_ctx_param *vparams)
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{
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EGLContext eglctx;
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EGLint ctx_att[] = {
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EGL_CONTEXT_CLIENT_VERSION, vparams->major_ver,
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EGL_CONTEXT_MINOR_VERSION_KHR, vparams->minor_ver,
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EGL_NONE
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};
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eglctx = eglCreateContext(ve->egl_display,
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ve->egl_conf,
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vparams->shared ? eglGetCurrentContext() : EGL_NO_CONTEXT,
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ctx_att);
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return (virgl_renderer_gl_context)eglctx;
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}
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void virgl_egl_destroy_context(struct virgl_egl *ve, virgl_renderer_gl_context virglctx)
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{
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EGLContext eglctx = (EGLContext)virglctx;
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eglDestroyContext(ve->egl_display, eglctx);
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}
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int virgl_egl_make_context_current(struct virgl_egl *ve, virgl_renderer_gl_context virglctx)
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{
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EGLContext eglctx = (EGLContext)virglctx;
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return eglMakeCurrent(ve->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
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eglctx);
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}
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virgl_renderer_gl_context virgl_egl_get_current_context(struct virgl_egl *ve)
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{
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EGLContext eglctx = eglGetCurrentContext();
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return (virgl_renderer_gl_context)eglctx;
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}
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int virgl_egl_get_fourcc_for_texture(struct virgl_egl *ve, uint32_t tex_id, uint32_t format, int *fourcc)
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{
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int ret = EINVAL;
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#ifndef EGL_MESA_image_dma_buf_export
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ret = 0;
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goto fallback;
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#else
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EGLImageKHR image;
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EGLBoolean b;
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if (!ve->have_mesa_dma_buf_img_export)
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goto fallback;
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image = eglCreateImageKHR(ve->egl_display, eglGetCurrentContext(), EGL_GL_TEXTURE_2D_KHR, (EGLClientBuffer)(unsigned long)tex_id, NULL);
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if (!image)
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return EINVAL;
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b = eglExportDMABUFImageQueryMESA(ve->egl_display, image, fourcc, NULL, NULL);
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if (!b)
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goto out_destroy;
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ret = 0;
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out_destroy:
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eglDestroyImageKHR(ve->egl_display, image);
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return ret;
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#endif
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fallback:
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*fourcc = virgl_egl_get_gbm_format(format);
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return ret;
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}
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int virgl_egl_get_fd_for_texture(struct virgl_egl *ve, uint32_t tex_id, int *fd)
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{
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EGLImageKHR image;
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EGLint stride;
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#ifdef EGL_MESA_image_dma_buf_export
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EGLint offset;
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#endif
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EGLBoolean b;
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int ret;
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image = eglCreateImageKHR(ve->egl_display, eglGetCurrentContext(), EGL_GL_TEXTURE_2D_KHR, (EGLClientBuffer)(unsigned long)tex_id, NULL);
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if (!image)
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return EINVAL;
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ret = EINVAL;
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if (ve->have_mesa_dma_buf_img_export) {
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#ifdef EGL_MESA_image_dma_buf_export
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b = eglExportDMABUFImageMESA(ve->egl_display,
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image,
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fd,
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&stride,
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&offset);
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if (!b)
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goto out_destroy;
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#else
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goto out_destroy;
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#endif
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} else {
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#ifdef EGL_MESA_drm_image
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EGLint handle;
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int r;
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b = eglExportDRMImageMESA(ve->egl_display,
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image,
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NULL, &handle,
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&stride);
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if (!b)
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goto out_destroy;
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fprintf(stderr,"image exported %d %d\n", handle, stride);
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r = drmPrimeHandleToFD(ve->fd, handle, DRM_CLOEXEC, fd);
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if (r < 0)
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goto out_destroy;
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#else
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goto out_destroy;
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#endif
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}
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ret = 0;
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out_destroy:
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eglDestroyImageKHR(ve->egl_display, image);
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return ret;
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}
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uint32_t virgl_egl_get_gbm_format(uint32_t format)
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{
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switch (format) {
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case VIRGL_FORMAT_B8G8R8X8_UNORM:
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return GBM_FORMAT_XRGB8888;
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case VIRGL_FORMAT_B8G8R8A8_UNORM:
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return GBM_FORMAT_ARGB8888;
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default:
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fprintf(stderr, "unknown format to convert to GBM %d\n", format);
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return 0;
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}
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}
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