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render/egl: introduce wlr_egl_dup_drm_fd

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This commit is contained in:
Simon Ser 2020-06-10 14:26:39 +02:00
parent eef8b3dde8
commit c8d95acc37
2 changed files with 78 additions and 0 deletions
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9
include/wlr/render/egl.h
View file

@ -45,8 +45,10 @@ struct wlr_egl {
EGLDisplay display;
EGLConfig config;
EGLContext context;
EGLDeviceEXT device; // may be EGL_NO_DEVICE_EXT
struct {
// Display extensions
bool bind_wayland_display_wl;
bool buffer_age_ext;
bool image_base_khr;
@ -54,6 +56,9 @@ struct wlr_egl {
bool image_dmabuf_import_ext;
bool image_dmabuf_import_modifiers_ext;
bool swap_buffers_with_damage;
// Device extensions
bool device_drm_ext;
} exts;
struct {
@ -70,6 +75,8 @@ struct wlr_egl {
PFNEGLEXPORTDMABUFIMAGEQUERYMESAPROC eglExportDMABUFImageQueryMESA;
PFNEGLEXPORTDMABUFIMAGEMESAPROC eglExportDMABUFImageMESA;
PFNEGLDEBUGMESSAGECONTROLKHRPROC eglDebugMessageControlKHR;
PFNEGLQUERYDISPLAYATTRIBEXTPROC eglQueryDisplayAttribEXT;
PFNEGLQUERYDEVICESTRINGEXTPROC eglQueryDeviceStringEXT;
} procs;
struct wl_display *wl_display;
@ -164,4 +171,6 @@ bool wlr_egl_swap_buffers(struct wlr_egl *egl, EGLSurface surface,
bool wlr_egl_destroy_surface(struct wlr_egl *egl, EGLSurface surface);
int wlr_egl_dup_drm_fd(struct wlr_egl *egl);
#endif

69
render/egl.c
View file

@ -1,10 +1,14 @@
#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <drm_fourcc.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <wlr/render/egl.h>
#include <wlr/util/log.h>
#include <wlr/util/region.h>
#include <xf86drm.h>
static bool egl_get_config(EGLDisplay disp, const EGLint *attribs,
EGLConfig *out, EGLint visual_id) {
@ -289,6 +293,32 @@ bool wlr_egl_init(struct wlr_egl *egl, EGLenum platform, void *remote_display,
"eglQueryWaylandBufferWL");
}
const char *device_exts_str = NULL;
if (check_egl_ext(client_exts_str, "EGL_EXT_device_query")) {
load_egl_proc(&egl->procs.eglQueryDisplayAttribEXT,
"eglQueryDisplayAttribEXT");
load_egl_proc(&egl->procs.eglQueryDeviceStringEXT,
"eglQueryDeviceStringEXT");
EGLAttrib device_attrib;
if (!egl->procs.eglQueryDisplayAttribEXT(egl->display,
EGL_DEVICE_EXT, &device_attrib)) {
wlr_log(WLR_ERROR, "eglQueryDisplayAttribEXT(EGL_DEVICE_EXT) failed");
goto error;
}
egl->device = (EGLDeviceEXT)device_attrib;
device_exts_str =
egl->procs.eglQueryDeviceStringEXT(egl->device, EGL_EXTENSIONS);
if (device_exts_str == NULL) {
wlr_log(WLR_ERROR, "eglQueryDeviceStringEXT(EGL_EXTENSIONS) failed");
goto error;
}
egl->exts.device_drm_ext =
check_egl_ext(device_exts_str, "EGL_EXT_device_drm");
}
if (!egl_get_config(egl->display, config_attribs, &egl->config, visual_id)) {
wlr_log(WLR_ERROR, "Failed to get EGL config");
goto error;
@ -297,6 +327,9 @@ bool wlr_egl_init(struct wlr_egl *egl, EGLenum platform, void *remote_display,
wlr_log(WLR_INFO, "Using EGL %d.%d", (int)major, (int)minor);
wlr_log(WLR_INFO, "Supported EGL client extensions: %s", client_exts_str);
wlr_log(WLR_INFO, "Supported EGL display extensions: %s", display_exts_str);
if (device_exts_str != NULL) {
wlr_log(WLR_INFO, "Supported EGL device extensions: %s", device_exts_str);
}
wlr_log(WLR_INFO, "EGL vendor: %s", eglQueryString(egl->display, EGL_VENDOR));
init_dmabuf_formats(egl);
@ -818,3 +851,39 @@ bool wlr_egl_destroy_surface(struct wlr_egl *egl, EGLSurface surface) {
}
return eglDestroySurface(egl->display, surface);
}
int wlr_egl_dup_drm_fd(struct wlr_egl *egl) {
if (egl->device == EGL_NO_DEVICE_EXT || !egl->exts.device_drm_ext) {
return -1;
}
const char *primary_name = egl->procs.eglQueryDeviceStringEXT(egl->device,
EGL_DRM_DEVICE_FILE_EXT);
if (primary_name == NULL) {
wlr_log(WLR_ERROR,
"eglQueryDeviceStringEXT(EGL_DRM_DEVICE_FILE_EXT) failed");
return -1;
}
int primary_fd = open(primary_name, O_RDWR | O_NONBLOCK | O_CLOEXEC);
if (primary_fd < 0) {
wlr_log_errno(WLR_ERROR, "Failed to open primary DRM device");
return -1;
}
char *render_name = drmGetRenderDeviceNameFromFd(primary_fd);
if (render_name == NULL) {
wlr_log_errno(WLR_ERROR, "drmGetRenderDeviceNameFromFd failed");
close(primary_fd);
return -1;
}
close(primary_fd);
int render_fd = open(render_name, O_RDWR | O_NONBLOCK | O_CLOEXEC);
if (render_fd < 0) {
wlr_log_errno(WLR_ERROR, "Failed to open render DRM device");
return -1;
}
return render_fd;
}