wlroots-hyprland/render/egl.c

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#include <assert.h>
#include <drm_fourcc.h>
#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
#include <unistd.h>
#include <gbm.h>
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#include <wlr/render/egl.h>
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#include <wlr/util/log.h>
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#include <wlr/util/region.h>
#include <xf86drm.h>
#include "render/egl.h"
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#include "util/env.h"
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static enum wlr_log_importance egl_log_importance_to_wlr(EGLint type) {
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switch (type) {
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case EGL_DEBUG_MSG_CRITICAL_KHR: return WLR_ERROR;
case EGL_DEBUG_MSG_ERROR_KHR: return WLR_ERROR;
case EGL_DEBUG_MSG_WARN_KHR: return WLR_ERROR;
case EGL_DEBUG_MSG_INFO_KHR: return WLR_INFO;
default: return WLR_INFO;
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}
}
static const char *egl_error_str(EGLint error) {
switch (error) {
case EGL_SUCCESS:
return "EGL_SUCCESS";
case EGL_NOT_INITIALIZED:
return "EGL_NOT_INITIALIZED";
case EGL_BAD_ACCESS:
return "EGL_BAD_ACCESS";
case EGL_BAD_ALLOC:
return "EGL_BAD_ALLOC";
case EGL_BAD_ATTRIBUTE:
return "EGL_BAD_ATTRIBUTE";
case EGL_BAD_CONTEXT:
return "EGL_BAD_CONTEXT";
case EGL_BAD_CONFIG:
return "EGL_BAD_CONFIG";
case EGL_BAD_CURRENT_SURFACE:
return "EGL_BAD_CURRENT_SURFACE";
case EGL_BAD_DISPLAY:
return "EGL_BAD_DISPLAY";
case EGL_BAD_DEVICE_EXT:
return "EGL_BAD_DEVICE_EXT";
case EGL_BAD_SURFACE:
return "EGL_BAD_SURFACE";
case EGL_BAD_MATCH:
return "EGL_BAD_MATCH";
case EGL_BAD_PARAMETER:
return "EGL_BAD_PARAMETER";
case EGL_BAD_NATIVE_PIXMAP:
return "EGL_BAD_NATIVE_PIXMAP";
case EGL_BAD_NATIVE_WINDOW:
return "EGL_BAD_NATIVE_WINDOW";
case EGL_CONTEXT_LOST:
return "EGL_CONTEXT_LOST";
}
return "unknown error";
}
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static void egl_log(EGLenum error, const char *command, EGLint msg_type,
EGLLabelKHR thread, EGLLabelKHR obj, const char *msg) {
_wlr_log(egl_log_importance_to_wlr(msg_type),
"[EGL] command: %s, error: %s (0x%x), message: \"%s\"",
command, egl_error_str(error), error, msg);
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}
static bool check_egl_ext(const char *exts, const char *ext) {
size_t extlen = strlen(ext);
const char *end = exts + strlen(exts);
while (exts < end) {
if (*exts == ' ') {
exts++;
continue;
}
size_t n = strcspn(exts, " ");
if (n == extlen && strncmp(ext, exts, n) == 0) {
return true;
}
exts += n;
}
return false;
}
static void load_egl_proc(void *proc_ptr, const char *name) {
void *proc = (void *)eglGetProcAddress(name);
if (proc == NULL) {
wlr_log(WLR_ERROR, "eglGetProcAddress(%s) failed", name);
abort();
}
*(void **)proc_ptr = proc;
}
static int get_egl_dmabuf_formats(struct wlr_egl *egl, EGLint **formats);
static int get_egl_dmabuf_modifiers(struct wlr_egl *egl, EGLint format,
uint64_t **modifiers, EGLBoolean **external_only);
static void log_modifier(uint64_t modifier, bool external_only) {
char *mod_name = drmGetFormatModifierName(modifier);
wlr_log(WLR_DEBUG, " %s (0x%016"PRIX64"): ✓ texture %s render",
mod_name ? mod_name : "<unknown>", modifier, external_only ? "" : "");
free(mod_name);
}
static void init_dmabuf_formats(struct wlr_egl *egl) {
bool no_modifiers = env_parse_bool("WLR_EGL_NO_MODIFIERS");
if (no_modifiers) {
wlr_log(WLR_INFO, "WLR_EGL_NO_MODIFIERS set, disabling modifiers for EGL");
}
EGLint *formats;
int formats_len = get_egl_dmabuf_formats(egl, &formats);
if (formats_len < 0) {
return;
}
wlr_log(WLR_DEBUG, "Supported DMA-BUF formats:");
bool has_modifiers = false;
for (int i = 0; i < formats_len; i++) {
EGLint fmt = formats[i];
uint64_t *modifiers = NULL;
EGLBoolean *external_only = NULL;
int modifiers_len = 0;
if (!no_modifiers) {
modifiers_len = get_egl_dmabuf_modifiers(egl, fmt, &modifiers, &external_only);
}
if (modifiers_len < 0) {
continue;
}
has_modifiers = has_modifiers || modifiers_len > 0;
bool all_external_only = true;
for (int j = 0; j < modifiers_len; j++) {
wlr_drm_format_set_add(&egl->dmabuf_texture_formats, fmt,
modifiers[j]);
if (!external_only[j]) {
wlr_drm_format_set_add(&egl->dmabuf_render_formats, fmt,
modifiers[j]);
all_external_only = false;
}
}
// EGL always supports implicit modifiers. If at least one modifier supports rendering,
// assume the implicit modifier supports rendering too.
wlr_drm_format_set_add(&egl->dmabuf_texture_formats, fmt,
DRM_FORMAT_MOD_INVALID);
if (modifiers_len == 0 || !all_external_only) {
wlr_drm_format_set_add(&egl->dmabuf_render_formats, fmt,
DRM_FORMAT_MOD_INVALID);
}
if (modifiers_len == 0) {
// Asume the linear layout is supported if the driver doesn't
// explicitly say otherwise
wlr_drm_format_set_add(&egl->dmabuf_texture_formats, fmt,
DRM_FORMAT_MOD_LINEAR);
wlr_drm_format_set_add(&egl->dmabuf_render_formats, fmt,
DRM_FORMAT_MOD_LINEAR);
}
if (wlr_log_get_verbosity() >= WLR_DEBUG) {
char *fmt_name = drmGetFormatName(fmt);
wlr_log(WLR_DEBUG, " %s (0x%08"PRIX32")",
fmt_name ? fmt_name : "<unknown>", fmt);
free(fmt_name);
log_modifier(DRM_FORMAT_MOD_INVALID, false);
if (modifiers_len == 0) {
log_modifier(DRM_FORMAT_MOD_LINEAR, false);
}
for (int j = 0; j < modifiers_len; j++) {
log_modifier(modifiers[j], external_only[j]);
}
}
free(modifiers);
free(external_only);
}
free(formats);
egl->has_modifiers = has_modifiers;
if (!no_modifiers) {
wlr_log(WLR_DEBUG, "EGL DMA-BUF format modifiers %s",
has_modifiers ? "supported" : "unsupported");
}
}
static struct wlr_egl *egl_create(void) {
const char *client_exts_str = eglQueryString(EGL_NO_DISPLAY, EGL_EXTENSIONS);
if (client_exts_str == NULL) {
if (eglGetError() == EGL_BAD_DISPLAY) {
wlr_log(WLR_ERROR, "EGL_EXT_client_extensions not supported");
} else {
wlr_log(WLR_ERROR, "Failed to query EGL client extensions");
}
return NULL;
}
wlr_log(WLR_INFO, "Supported EGL client extensions: %s", client_exts_str);
if (!check_egl_ext(client_exts_str, "EGL_EXT_platform_base")) {
wlr_log(WLR_ERROR, "EGL_EXT_platform_base not supported");
return NULL;
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}
struct wlr_egl *egl = calloc(1, sizeof(*egl));
if (egl == NULL) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
return NULL;
}
load_egl_proc(&egl->procs.eglGetPlatformDisplayEXT,
"eglGetPlatformDisplayEXT");
egl->exts.KHR_platform_gbm = check_egl_ext(client_exts_str,
"EGL_KHR_platform_gbm");
egl->exts.EXT_platform_device = check_egl_ext(client_exts_str,
"EGL_EXT_platform_device");
egl->exts.KHR_display_reference = check_egl_ext(client_exts_str,
"EGL_KHR_display_reference");
if (check_egl_ext(client_exts_str, "EGL_EXT_device_base") || check_egl_ext(client_exts_str, "EGL_EXT_device_enumeration")) {
load_egl_proc(&egl->procs.eglQueryDevicesEXT, "eglQueryDevicesEXT");
}
if (check_egl_ext(client_exts_str, "EGL_EXT_device_base") || check_egl_ext(client_exts_str, "EGL_EXT_device_query")) {
egl->exts.EXT_device_query = true;
load_egl_proc(&egl->procs.eglQueryDeviceStringEXT,
"eglQueryDeviceStringEXT");
load_egl_proc(&egl->procs.eglQueryDisplayAttribEXT,
"eglQueryDisplayAttribEXT");
}
if (check_egl_ext(client_exts_str, "EGL_KHR_debug")) {
load_egl_proc(&egl->procs.eglDebugMessageControlKHR,
"eglDebugMessageControlKHR");
static const EGLAttrib debug_attribs[] = {
EGL_DEBUG_MSG_CRITICAL_KHR, EGL_TRUE,
EGL_DEBUG_MSG_ERROR_KHR, EGL_TRUE,
EGL_DEBUG_MSG_WARN_KHR, EGL_TRUE,
EGL_DEBUG_MSG_INFO_KHR, EGL_TRUE,
EGL_NONE,
};
egl->procs.eglDebugMessageControlKHR(egl_log, debug_attribs);
}
if (eglBindAPI(EGL_OPENGL_ES_API) == EGL_FALSE) {
wlr_log(WLR_ERROR, "Failed to bind to the OpenGL ES API");
free(egl);
return NULL;
}
return egl;
}
static bool egl_init_display(struct wlr_egl *egl, EGLDisplay display) {
egl->display = display;
EGLint major, minor;
if (eglInitialize(egl->display, &major, &minor) == EGL_FALSE) {
wlr_log(WLR_ERROR, "Failed to initialize EGL");
return false;
}
const char *display_exts_str = eglQueryString(egl->display, EGL_EXTENSIONS);
if (display_exts_str == NULL) {
wlr_log(WLR_ERROR, "Failed to query EGL display extensions");
return false;
}
if (check_egl_ext(display_exts_str, "EGL_KHR_image_base")) {
egl->exts.KHR_image_base = true;
load_egl_proc(&egl->procs.eglCreateImageKHR, "eglCreateImageKHR");
load_egl_proc(&egl->procs.eglDestroyImageKHR, "eglDestroyImageKHR");
}
egl->exts.EXT_image_dma_buf_import =
check_egl_ext(display_exts_str, "EGL_EXT_image_dma_buf_import");
if (check_egl_ext(display_exts_str,
"EGL_EXT_image_dma_buf_import_modifiers")) {
egl->exts.EXT_image_dma_buf_import_modifiers = true;
load_egl_proc(&egl->procs.eglQueryDmaBufFormatsEXT,
"eglQueryDmaBufFormatsEXT");
load_egl_proc(&egl->procs.eglQueryDmaBufModifiersEXT,
"eglQueryDmaBufModifiersEXT");
}
egl->exts.EXT_create_context_robustness =
check_egl_ext(display_exts_str, "EGL_EXT_create_context_robustness");
const char *device_exts_str = NULL, *driver_name = NULL;
if (egl->exts.EXT_device_query) {
EGLAttrib device_attrib;
if (!egl->procs.eglQueryDisplayAttribEXT(egl->display,
EGL_DEVICE_EXT, &device_attrib)) {
wlr_log(WLR_ERROR, "eglQueryDisplayAttribEXT(EGL_DEVICE_EXT) failed");
return false;
}
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");
return false;
}
if (check_egl_ext(device_exts_str, "EGL_MESA_device_software")) {
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if (env_parse_bool("WLR_RENDERER_ALLOW_SOFTWARE")) {
wlr_log(WLR_INFO, "Using software rendering");
} else {
wlr_log(WLR_ERROR, "Software rendering detected, please use "
"the WLR_RENDERER_ALLOW_SOFTWARE environment variable "
"to proceed");
return false;
}
}
#ifdef EGL_DRIVER_NAME_EXT
if (check_egl_ext(device_exts_str, "EGL_EXT_device_persistent_id")) {
driver_name = egl->procs.eglQueryDeviceStringEXT(egl->device,
EGL_DRIVER_NAME_EXT);
}
#endif
egl->exts.EXT_device_drm =
check_egl_ext(device_exts_str, "EGL_EXT_device_drm");
egl->exts.EXT_device_drm_render_node =
check_egl_ext(device_exts_str, "EGL_EXT_device_drm_render_node");
}
if (!check_egl_ext(display_exts_str, "EGL_KHR_no_config_context") &&
!check_egl_ext(display_exts_str, "EGL_MESA_configless_context")) {
wlr_log(WLR_ERROR, "EGL_KHR_no_config_context or "
"EGL_MESA_configless_context not supported");
return false;
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}
if (!check_egl_ext(display_exts_str, "EGL_KHR_surfaceless_context")) {
wlr_log(WLR_ERROR, "EGL_KHR_surfaceless_context not supported");
return false;
}
egl->exts.IMG_context_priority =
check_egl_ext(display_exts_str, "EGL_IMG_context_priority");
wlr_log(WLR_INFO, "Using EGL %d.%d", (int)major, (int)minor);
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);
}
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wlr_log(WLR_INFO, "EGL vendor: %s", eglQueryString(egl->display, EGL_VENDOR));
if (driver_name != NULL) {
wlr_log(WLR_INFO, "EGL driver name: %s", driver_name);
}
init_dmabuf_formats(egl);
return true;
}
static bool egl_init(struct wlr_egl *egl, EGLenum platform,
void *remote_display) {
EGLint display_attribs[3] = {0};
size_t display_attribs_len = 0;
if (egl->exts.KHR_display_reference) {
display_attribs[display_attribs_len++] = EGL_TRACK_REFERENCES_KHR;
display_attribs[display_attribs_len++] = EGL_TRUE;
}
display_attribs[display_attribs_len++] = EGL_NONE;
assert(display_attribs_len < sizeof(display_attribs) / sizeof(display_attribs[0]));
EGLDisplay display = egl->procs.eglGetPlatformDisplayEXT(platform,
remote_display, display_attribs);
if (display == EGL_NO_DISPLAY) {
wlr_log(WLR_ERROR, "Failed to create EGL display");
return false;
}
if (!egl_init_display(egl, display)) {
if (egl->exts.KHR_display_reference) {
eglTerminate(display);
}
return false;
}
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size_t atti = 0;
EGLint attribs[7];
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attribs[atti++] = EGL_CONTEXT_CLIENT_VERSION;
attribs[atti++] = 2;
// Request a high priority context if possible
// TODO: only do this if we're running as the DRM master
bool request_high_priority = egl->exts.IMG_context_priority;
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// Try to reschedule all of our rendering to be completed first. If it
// fails, it will fallback to the default priority (MEDIUM).
if (request_high_priority) {
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attribs[atti++] = EGL_CONTEXT_PRIORITY_LEVEL_IMG;
attribs[atti++] = EGL_CONTEXT_PRIORITY_HIGH_IMG;
}
if (egl->exts.EXT_create_context_robustness) {
attribs[atti++] = EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_EXT;
attribs[atti++] = EGL_LOSE_CONTEXT_ON_RESET_EXT;
}
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attribs[atti++] = EGL_NONE;
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assert(atti <= sizeof(attribs)/sizeof(attribs[0]));
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egl->context = eglCreateContext(egl->display, EGL_NO_CONFIG_KHR,
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EGL_NO_CONTEXT, attribs);
if (egl->context == EGL_NO_CONTEXT) {
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wlr_log(WLR_ERROR, "Failed to create EGL context");
return false;
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}
if (request_high_priority) {
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EGLint priority = EGL_CONTEXT_PRIORITY_MEDIUM_IMG;
eglQueryContext(egl->display, egl->context,
EGL_CONTEXT_PRIORITY_LEVEL_IMG, &priority);
if (priority != EGL_CONTEXT_PRIORITY_HIGH_IMG) {
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wlr_log(WLR_INFO, "Failed to obtain a high priority context");
} else {
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wlr_log(WLR_DEBUG, "Obtained high priority context");
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}
}
return true;
}
static bool device_has_name(const drmDevice *device, const char *name);
static EGLDeviceEXT get_egl_device_from_drm_fd(struct wlr_egl *egl,
int drm_fd) {
if (egl->procs.eglQueryDevicesEXT == NULL) {
wlr_log(WLR_DEBUG, "EGL_EXT_device_enumeration not supported");
return EGL_NO_DEVICE_EXT;
} else if (!egl->exts.EXT_device_query) {
wlr_log(WLR_DEBUG, "EGL_EXT_device_query not supported");
return EGL_NO_DEVICE_EXT;
}
EGLint nb_devices = 0;
if (!egl->procs.eglQueryDevicesEXT(0, NULL, &nb_devices)) {
wlr_log(WLR_ERROR, "Failed to query EGL devices");
return EGL_NO_DEVICE_EXT;
}
EGLDeviceEXT *devices = calloc(nb_devices, sizeof(*devices));
if (devices == NULL) {
wlr_log_errno(WLR_ERROR, "Failed to allocate EGL device list");
return EGL_NO_DEVICE_EXT;
}
if (!egl->procs.eglQueryDevicesEXT(nb_devices, devices, &nb_devices)) {
wlr_log(WLR_ERROR, "Failed to query EGL devices");
return EGL_NO_DEVICE_EXT;
}
drmDevice *device = NULL;
int ret = drmGetDevice(drm_fd, &device);
if (ret < 0) {
wlr_log(WLR_ERROR, "Failed to get DRM device: %s", strerror(-ret));
return EGL_NO_DEVICE_EXT;
}
EGLDeviceEXT egl_device = NULL;
for (int i = 0; i < nb_devices; i++) {
const char *egl_device_name = egl->procs.eglQueryDeviceStringEXT(
devices[i], EGL_DRM_DEVICE_FILE_EXT);
if (egl_device_name == NULL) {
continue;
}
if (device_has_name(device, egl_device_name)) {
wlr_log(WLR_DEBUG, "Using EGL device %s", egl_device_name);
egl_device = devices[i];
break;
}
}
drmFreeDevice(&device);
free(devices);
return egl_device;
}
static int open_render_node(int drm_fd) {
char *render_name = drmGetRenderDeviceNameFromFd(drm_fd);
if (render_name == NULL) {
// This can happen on split render/display platforms, fallback to
// primary node
render_name = drmGetPrimaryDeviceNameFromFd(drm_fd);
if (render_name == NULL) {
wlr_log_errno(WLR_ERROR, "drmGetPrimaryDeviceNameFromFd failed");
return -1;
}
wlr_log(WLR_DEBUG, "DRM device '%s' has no render node, "
"falling back to primary node", render_name);
}
int render_fd = open(render_name, O_RDWR | O_CLOEXEC);
if (render_fd < 0) {
wlr_log_errno(WLR_ERROR, "Failed to open DRM node '%s'", render_name);
}
free(render_name);
return render_fd;
}
struct wlr_egl *wlr_egl_create_with_drm_fd(int drm_fd) {
struct wlr_egl *egl = egl_create();
if (egl == NULL) {
wlr_log(WLR_ERROR, "Failed to create EGL context");
return NULL;
}
if (egl->exts.EXT_platform_device) {
/*
* Search for the EGL device matching the DRM fd using the
* EXT_device_enumeration extension.
*/
EGLDeviceEXT egl_device = get_egl_device_from_drm_fd(egl, drm_fd);
if (egl_device != EGL_NO_DEVICE_EXT) {
if (egl_init(egl, EGL_PLATFORM_DEVICE_EXT, egl_device)) {
wlr_log(WLR_DEBUG, "Using EGL_PLATFORM_DEVICE_EXT");
return egl;
}
goto error;
}
/* Falls back on GBM in case the device was not found */
} else {
wlr_log(WLR_DEBUG, "EXT_platform_device not supported");
}
if (egl->exts.KHR_platform_gbm) {
int gbm_fd = open_render_node(drm_fd);
if (gbm_fd < 0) {
wlr_log(WLR_ERROR, "Failed to open DRM render node");
goto error;
}
egl->gbm_device = gbm_create_device(gbm_fd);
if (!egl->gbm_device) {
close(gbm_fd);
wlr_log(WLR_ERROR, "Failed to create GBM device");
goto error;
}
if (egl_init(egl, EGL_PLATFORM_GBM_KHR, egl->gbm_device)) {
wlr_log(WLR_DEBUG, "Using EGL_PLATFORM_GBM_KHR");
return egl;
}
gbm_device_destroy(egl->gbm_device);
close(gbm_fd);
} else {
wlr_log(WLR_DEBUG, "KHR_platform_gbm not supported");
}
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error:
wlr_log(WLR_ERROR, "Failed to initialize EGL context");
free(egl);
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eglReleaseThread();
return NULL;
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}
struct wlr_egl *wlr_egl_create_with_context(EGLDisplay display,
EGLContext context) {
EGLint client_type;
if (!eglQueryContext(display, context, EGL_CONTEXT_CLIENT_TYPE, &client_type) ||
client_type != EGL_OPENGL_ES_API) {
wlr_log(WLR_ERROR, "Unsupported EGL context client type (need OpenGL ES)");
return NULL;
}
EGLint client_version;
if (!eglQueryContext(display, context, EGL_CONTEXT_CLIENT_VERSION, &client_version) ||
client_version < 2) {
wlr_log(WLR_ERROR, "Unsupported EGL context client version (need OpenGL ES >= 2)");
return NULL;
}
struct wlr_egl *egl = egl_create();
if (egl == NULL) {
return NULL;
}
if (!egl_init_display(egl, display)) {
free(egl);
return NULL;
}
egl->context = context;
return egl;
}
void wlr_egl_destroy(struct wlr_egl *egl) {
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if (egl == NULL) {
return;
}
wlr_drm_format_set_finish(&egl->dmabuf_render_formats);
wlr_drm_format_set_finish(&egl->dmabuf_texture_formats);
eglMakeCurrent(egl->display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
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eglDestroyContext(egl->display, egl->context);
if (egl->exts.KHR_display_reference) {
eglTerminate(egl->display);
}
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eglReleaseThread();
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if (egl->gbm_device) {
int gbm_fd = gbm_device_get_fd(egl->gbm_device);
gbm_device_destroy(egl->gbm_device);
close(gbm_fd);
}
free(egl);
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}
EGLDisplay wlr_egl_get_display(struct wlr_egl *egl) {
return egl->display;
}
EGLContext wlr_egl_get_context(struct wlr_egl *egl) {
return egl->context;
}
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bool wlr_egl_destroy_image(struct wlr_egl *egl, EGLImage image) {
if (!egl->exts.KHR_image_base) {
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return false;
}
if (!image) {
return true;
}
return egl->procs.eglDestroyImageKHR(egl->display, image);
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}
bool wlr_egl_make_current(struct wlr_egl *egl,
struct wlr_egl_context *save_context) {
if (save_context != NULL) {
save_context->display = eglGetCurrentDisplay();
save_context->context = eglGetCurrentContext();
save_context->draw_surface = eglGetCurrentSurface(EGL_DRAW);
save_context->read_surface = eglGetCurrentSurface(EGL_READ);
}
if (!eglMakeCurrent(egl->display, EGL_NO_SURFACE, EGL_NO_SURFACE,
egl->context)) {
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wlr_log(WLR_ERROR, "eglMakeCurrent failed");
return false;
}
return true;
}
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bool wlr_egl_unset_current(struct wlr_egl *egl) {
if (!eglMakeCurrent(egl->display, EGL_NO_SURFACE, EGL_NO_SURFACE,
EGL_NO_CONTEXT)) {
wlr_log(WLR_ERROR, "eglMakeCurrent failed");
return false;
}
return true;
}
bool wlr_egl_restore_context(struct wlr_egl_context *context) {
// If the saved context is a null-context, we must use the current
// display instead of the saved display because eglMakeCurrent() can't
// handle EGL_NO_DISPLAY.
EGLDisplay display = context->display == EGL_NO_DISPLAY ?
eglGetCurrentDisplay() : context->display;
// If the current display is also EGL_NO_DISPLAY, we assume that there
// is currently no context set and no action needs to be taken to unset
// the context.
if (display == EGL_NO_DISPLAY) {
return true;
}
return eglMakeCurrent(display, context->draw_surface,
context->read_surface, context->context);
}
EGLImageKHR wlr_egl_create_image_from_dmabuf(struct wlr_egl *egl,
struct wlr_dmabuf_attributes *attributes, bool *external_only) {
if (!egl->exts.KHR_image_base || !egl->exts.EXT_image_dma_buf_import) {
wlr_log(WLR_ERROR, "dmabuf import extension not present");
return NULL;
}
if (attributes->modifier != DRM_FORMAT_MOD_INVALID &&
attributes->modifier != DRM_FORMAT_MOD_LINEAR &&
!egl->has_modifiers) {
wlr_log(WLR_ERROR, "EGL implementation doesn't support modifiers");
return NULL;
}
unsigned int atti = 0;
EGLint attribs[50];
attribs[atti++] = EGL_WIDTH;
attribs[atti++] = attributes->width;
attribs[atti++] = EGL_HEIGHT;
attribs[atti++] = attributes->height;
attribs[atti++] = EGL_LINUX_DRM_FOURCC_EXT;
attribs[atti++] = attributes->format;
struct {
EGLint fd;
EGLint offset;
EGLint pitch;
EGLint mod_lo;
EGLint mod_hi;
} attr_names[WLR_DMABUF_MAX_PLANES] = {
{
EGL_DMA_BUF_PLANE0_FD_EXT,
EGL_DMA_BUF_PLANE0_OFFSET_EXT,
EGL_DMA_BUF_PLANE0_PITCH_EXT,
EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT,
EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT
}, {
EGL_DMA_BUF_PLANE1_FD_EXT,
EGL_DMA_BUF_PLANE1_OFFSET_EXT,
EGL_DMA_BUF_PLANE1_PITCH_EXT,
EGL_DMA_BUF_PLANE1_MODIFIER_LO_EXT,
EGL_DMA_BUF_PLANE1_MODIFIER_HI_EXT
}, {
EGL_DMA_BUF_PLANE2_FD_EXT,
EGL_DMA_BUF_PLANE2_OFFSET_EXT,
EGL_DMA_BUF_PLANE2_PITCH_EXT,
EGL_DMA_BUF_PLANE2_MODIFIER_LO_EXT,
EGL_DMA_BUF_PLANE2_MODIFIER_HI_EXT
}, {
EGL_DMA_BUF_PLANE3_FD_EXT,
EGL_DMA_BUF_PLANE3_OFFSET_EXT,
EGL_DMA_BUF_PLANE3_PITCH_EXT,
EGL_DMA_BUF_PLANE3_MODIFIER_LO_EXT,
EGL_DMA_BUF_PLANE3_MODIFIER_HI_EXT
}
};
for (int i = 0; i < attributes->n_planes; i++) {
attribs[atti++] = attr_names[i].fd;
attribs[atti++] = attributes->fd[i];
attribs[atti++] = attr_names[i].offset;
attribs[atti++] = attributes->offset[i];
attribs[atti++] = attr_names[i].pitch;
attribs[atti++] = attributes->stride[i];
if (egl->has_modifiers &&
attributes->modifier != DRM_FORMAT_MOD_INVALID) {
attribs[atti++] = attr_names[i].mod_lo;
attribs[atti++] = attributes->modifier & 0xFFFFFFFF;
attribs[atti++] = attr_names[i].mod_hi;
attribs[atti++] = attributes->modifier >> 32;
}
}
// Our clients don't expect our usage to trash the buffer contents
attribs[atti++] = EGL_IMAGE_PRESERVED_KHR;
attribs[atti++] = EGL_TRUE;
attribs[atti++] = EGL_NONE;
assert(atti < sizeof(attribs)/sizeof(attribs[0]));
EGLImageKHR image = egl->procs.eglCreateImageKHR(egl->display, EGL_NO_CONTEXT,
EGL_LINUX_DMA_BUF_EXT, NULL, attribs);
if (image == EGL_NO_IMAGE_KHR) {
wlr_log(WLR_ERROR, "eglCreateImageKHR failed");
return EGL_NO_IMAGE_KHR;
}
*external_only = !wlr_drm_format_set_has(&egl->dmabuf_render_formats,
attributes->format, attributes->modifier);
return image;
}
static int get_egl_dmabuf_formats(struct wlr_egl *egl, EGLint **formats) {
if (!egl->exts.EXT_image_dma_buf_import) {
wlr_log(WLR_DEBUG, "DMA-BUF import extension not present");
return -1;
}
// when we only have the image_dmabuf_import extension we can't query
// which formats are supported. These two are on almost always
// supported; it's the intended way to just try to create buffers.
// Just a guess but better than not supporting dmabufs at all,
// given that the modifiers extension isn't supported everywhere.
if (!egl->exts.EXT_image_dma_buf_import_modifiers) {
static const EGLint fallback_formats[] = {
DRM_FORMAT_ARGB8888,
DRM_FORMAT_XRGB8888,
};
int num = sizeof(fallback_formats) / sizeof(fallback_formats[0]);
*formats = calloc(num, sizeof(**formats));
if (!*formats) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
return -1;
}
memcpy(*formats, fallback_formats, num * sizeof(**formats));
return num;
}
EGLint num;
if (!egl->procs.eglQueryDmaBufFormatsEXT(egl->display, 0, NULL, &num)) {
wlr_log(WLR_ERROR, "Failed to query number of dmabuf formats");
return -1;
}
*formats = calloc(num, sizeof(**formats));
if (*formats == NULL) {
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wlr_log(WLR_ERROR, "Allocation failed: %s", strerror(errno));
return -1;
}
if (!egl->procs.eglQueryDmaBufFormatsEXT(egl->display, num, *formats, &num)) {
wlr_log(WLR_ERROR, "Failed to query dmabuf format");
free(*formats);
return -1;
}
return num;
}
static int get_egl_dmabuf_modifiers(struct wlr_egl *egl, EGLint format,
uint64_t **modifiers, EGLBoolean **external_only) {
*modifiers = NULL;
*external_only = NULL;
if (!egl->exts.EXT_image_dma_buf_import) {
wlr_log(WLR_DEBUG, "DMA-BUF extension not present");
return -1;
}
if (!egl->exts.EXT_image_dma_buf_import_modifiers) {
return 0;
}
EGLint num;
if (!egl->procs.eglQueryDmaBufModifiersEXT(egl->display, format, 0,
NULL, NULL, &num)) {
wlr_log(WLR_ERROR, "Failed to query dmabuf number of modifiers");
return -1;
}
if (num == 0) {
return 0;
}
*modifiers = calloc(num, sizeof(**modifiers));
if (*modifiers == NULL) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
return -1;
}
*external_only = calloc(num, sizeof(**external_only));
if (*external_only == NULL) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
free(*modifiers);
*modifiers = NULL;
return -1;
}
if (!egl->procs.eglQueryDmaBufModifiersEXT(egl->display, format, num,
*modifiers, *external_only, &num)) {
wlr_log(WLR_ERROR, "Failed to query dmabuf modifiers");
free(*modifiers);
free(*external_only);
return -1;
}
return num;
}
const struct wlr_drm_format_set *wlr_egl_get_dmabuf_texture_formats(
struct wlr_egl *egl) {
return &egl->dmabuf_texture_formats;
}
const struct wlr_drm_format_set *wlr_egl_get_dmabuf_render_formats(
struct wlr_egl *egl) {
return &egl->dmabuf_render_formats;
}
static bool device_has_name(const drmDevice *device, const char *name) {
for (size_t i = 0; i < DRM_NODE_MAX; i++) {
if (!(device->available_nodes & (1 << i))) {
continue;
}
if (strcmp(device->nodes[i], name) == 0) {
return true;
}
}
return false;
}
static char *get_render_name(const char *name) {
uint32_t flags = 0;
int devices_len = drmGetDevices2(flags, NULL, 0);
if (devices_len < 0) {
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wlr_log(WLR_ERROR, "drmGetDevices2 failed: %s", strerror(-devices_len));
return NULL;
}
drmDevice **devices = calloc(devices_len, sizeof(*devices));
if (devices == NULL) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
return NULL;
}
devices_len = drmGetDevices2(flags, devices, devices_len);
if (devices_len < 0) {
free(devices);
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wlr_log(WLR_ERROR, "drmGetDevices2 failed: %s", strerror(-devices_len));
return NULL;
}
const drmDevice *match = NULL;
for (int i = 0; i < devices_len; i++) {
if (device_has_name(devices[i], name)) {
match = devices[i];
break;
}
}
char *render_name = NULL;
if (match == NULL) {
wlr_log(WLR_ERROR, "Cannot find DRM device %s", name);
} else if (!(match->available_nodes & (1 << DRM_NODE_RENDER))) {
// Likely a split display/render setup. Pick the primary node and hope
// Mesa will open the right render node under-the-hood.
wlr_log(WLR_DEBUG, "DRM device %s has no render node, "
"falling back to primary node", name);
assert(match->available_nodes & (1 << DRM_NODE_PRIMARY));
render_name = strdup(match->nodes[DRM_NODE_PRIMARY]);
} else {
render_name = strdup(match->nodes[DRM_NODE_RENDER]);
}
for (int i = 0; i < devices_len; i++) {
drmFreeDevice(&devices[i]);
}
free(devices);
return render_name;
}
static int dup_egl_device_drm_fd(struct wlr_egl *egl) {
if (egl->device == EGL_NO_DEVICE_EXT || (!egl->exts.EXT_device_drm &&
!egl->exts.EXT_device_drm_render_node)) {
return -1;
}
char *render_name = NULL;
#ifdef EGL_EXT_device_drm_render_node
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if (egl->exts.EXT_device_drm_render_node) {
const char *name = egl->procs.eglQueryDeviceStringEXT(egl->device,
EGL_DRM_RENDER_NODE_FILE_EXT);
if (name == NULL) {
wlr_log(WLR_DEBUG, "EGL device has no render node");
return -1;
}
render_name = strdup(name);
}
#endif
if (render_name == NULL) {
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;
}
render_name = get_render_name(primary_name);
if (render_name == NULL) {
wlr_log(WLR_ERROR, "Can't find render node name for device %s",
primary_name);
return -1;
}
}
int render_fd = open(render_name, O_RDWR | O_NONBLOCK | O_CLOEXEC);
if (render_fd < 0) {
wlr_log_errno(WLR_ERROR, "Failed to open DRM render node %s",
render_name);
free(render_name);
return -1;
}
free(render_name);
return render_fd;
}
int wlr_egl_dup_drm_fd(struct wlr_egl *egl) {
int fd = dup_egl_device_drm_fd(egl);
if (fd >= 0) {
return fd;
}
// Fallback to GBM's FD if we can't use EGLDevice
if (egl->gbm_device == NULL) {
return -1;
}
fd = fcntl(gbm_device_get_fd(egl->gbm_device), F_DUPFD_CLOEXEC, 0);
if (fd < 0) {
wlr_log_errno(WLR_ERROR, "Failed to dup GBM FD");
}
return fd;
}