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wlroots/render/egl.c
Simon Ser 9ecfa4343a render: remove wlr_texture_to_dmabuf 
This is unused in wlroots, and the use-cases for compositors are
pretty niche since they can access the original DMA-BUF via the
wlr_buffer.
2021-04-08 09:09:50 +02:00

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#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 <gbm.h>
#include <wlr/render/egl.h>
#include <wlr/util/log.h>
#include <wlr/util/region.h>
#include <xf86drm.h>
static enum wlr_log_importance egl_log_importance_to_wlr(EGLint type) {
switch (type) {
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;
}
}
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";
}
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);
}
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, int **formats);
static int get_egl_dmabuf_modifiers(struct wlr_egl *egl, int format,
uint64_t **modifiers, EGLBoolean **external_only);
static void init_dmabuf_formats(struct wlr_egl *egl) {
int *formats;
int formats_len = get_egl_dmabuf_formats(egl, &formats);
if (formats_len < 0) {
return;
}
bool has_modifiers = false;
for (int i = 0; i < formats_len; i++) {
uint32_t fmt = formats[i];
uint64_t *modifiers;
EGLBoolean *external_only;
int modifiers_len =
get_egl_dmabuf_modifiers(egl, fmt, &modifiers, &external_only);
if (modifiers_len < 0) {
continue;
}
has_modifiers = has_modifiers || modifiers_len > 0;
if (modifiers_len == 0) {
wlr_drm_format_set_add(&egl->dmabuf_texture_formats, fmt,
DRM_FORMAT_MOD_INVALID);
wlr_drm_format_set_add(&egl->dmabuf_render_formats, fmt,
DRM_FORMAT_MOD_INVALID);
}
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]);
}
}
free(modifiers);
free(external_only);
}
char *str_formats = malloc(formats_len * 5 + 1);
if (str_formats == NULL) {
goto out;
}
for (int i = 0; i < formats_len; i++) {
snprintf(&str_formats[i*5], (formats_len - i) * 5 + 1, "%.4s ",
(char*)&formats[i]);
}
wlr_log(WLR_DEBUG, "Supported DMA-BUF formats: %s", str_formats);
wlr_log(WLR_DEBUG, "EGL DMA-BUF format modifiers %s",
has_modifiers ? "supported" : "unsupported");
free(str_formats);
out:
free(formats);
}
struct wlr_egl *wlr_egl_create(EGLenum platform, void *remote_display) {
struct wlr_egl *egl = calloc(1, sizeof(struct wlr_egl));
if (egl == NULL) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
return NULL;
}
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;
}
if (platform == EGL_PLATFORM_GBM_KHR) {
if (!check_egl_ext(client_exts_str, "EGL_KHR_platform_gbm")) {
wlr_log(WLR_ERROR, "EGL_KHR_platform_gbm not supported");
return NULL;
}
}
if (!check_egl_ext(client_exts_str, "EGL_EXT_platform_base")) {
wlr_log(WLR_ERROR, "EGL_EXT_platform_base not supported");
return NULL;
}
load_egl_proc(&egl->procs.eglGetPlatformDisplayEXT,
"eglGetPlatformDisplayEXT");
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");
goto error;
}
egl->display = egl->procs.eglGetPlatformDisplayEXT(platform,
remote_display, NULL);
if (egl->display == EGL_NO_DISPLAY) {
wlr_log(WLR_ERROR, "Failed to create EGL display");
goto error;
}
EGLint major, minor;
if (eglInitialize(egl->display, &major, &minor) == EGL_FALSE) {
wlr_log(WLR_ERROR, "Failed to initialize EGL");
goto error;
}
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 NULL;
}
if (check_egl_ext(display_exts_str, "EGL_KHR_image_base")) {
egl->exts.image_base_khr = true;
load_egl_proc(&egl->procs.eglCreateImageKHR, "eglCreateImageKHR");
load_egl_proc(&egl->procs.eglDestroyImageKHR, "eglDestroyImageKHR");
}
egl->exts.image_dmabuf_import_ext =
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.image_dmabuf_import_modifiers_ext = true;
load_egl_proc(&egl->procs.eglQueryDmaBufFormatsEXT,
"eglQueryDmaBufFormatsEXT");
load_egl_proc(&egl->procs.eglQueryDmaBufModifiersEXT,
"eglQueryDmaBufModifiersEXT");
}
if (check_egl_ext(display_exts_str, "EGL_WL_bind_wayland_display")) {
egl->exts.bind_wayland_display_wl = true;
load_egl_proc(&egl->procs.eglBindWaylandDisplayWL,
"eglBindWaylandDisplayWL");
load_egl_proc(&egl->procs.eglUnbindWaylandDisplayWL,
"eglUnbindWaylandDisplayWL");
load_egl_proc(&egl->procs.eglQueryWaylandBufferWL,
"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;
}
if (check_egl_ext(device_exts_str, "EGL_MESA_device_software")) {
const char *allow_software = getenv("WLR_RENDERER_ALLOW_SOFTWARE");
if (allow_software != NULL && strcmp(allow_software, "1") == 0) {
wlr_log(WLR_INFO, "Using software rendering");
} else {
// Because of a Mesa bug, sometimes EGL_MESA_device_software is
// advertised for hardware renderers. See:
// https://gitlab.freedesktop.org/mesa/mesa/-/issues/4178
// TODO: fail without WLR_RENDERER_ALLOW_SOFTWARE
wlr_log(WLR_INFO, "Warning: software rendering may be in use");
wlr_log(WLR_INFO, "If you experience slow rendering, "
"please check the OpenGL drivers are correctly installed");
}
}
egl->exts.device_drm_ext =
check_egl_ext(device_exts_str, "EGL_EXT_device_drm");
}
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");
goto error;
}
if (!check_egl_ext(display_exts_str, "EGL_KHR_surfaceless_context")) {
wlr_log(WLR_ERROR,
"EGL_KHR_surfaceless_context not supported");
goto error;
}
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);
bool ext_context_priority =
check_egl_ext(display_exts_str, "EGL_IMG_context_priority");
size_t atti = 0;
EGLint attribs[5];
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 = ext_context_priority;
// 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) {
attribs[atti++] = EGL_CONTEXT_PRIORITY_LEVEL_IMG;
attribs[atti++] = EGL_CONTEXT_PRIORITY_HIGH_IMG;
}
attribs[atti++] = EGL_NONE;
assert(atti <= sizeof(attribs)/sizeof(attribs[0]));
egl->context = eglCreateContext(egl->display, EGL_NO_CONFIG_KHR,
EGL_NO_CONTEXT, attribs);
if (egl->context == EGL_NO_CONTEXT) {
wlr_log(WLR_ERROR, "Failed to create EGL context");
goto error;
}
if (request_high_priority) {
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) {
wlr_log(WLR_INFO, "Failed to obtain a high priority context");
} else {
wlr_log(WLR_DEBUG, "Obtained high priority context");
}
}
return egl;
error:
eglMakeCurrent(EGL_NO_DISPLAY, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
if (egl->display) {
eglTerminate(egl->display);
}
eglReleaseThread();
return NULL;
}
void wlr_egl_destroy(struct wlr_egl *egl) {
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);
if (egl->wl_display) {
assert(egl->exts.bind_wayland_display_wl);
egl->procs.eglUnbindWaylandDisplayWL(egl->display, egl->wl_display);
}
eglDestroyContext(egl->display, egl->context);
eglTerminate(egl->display);
eglReleaseThread();
if (egl->gbm_device) {
gbm_device_destroy(egl->gbm_device);
}
free(egl);
}
bool wlr_egl_bind_display(struct wlr_egl *egl, struct wl_display *local_display) {
if (!egl->exts.bind_wayland_display_wl) {
return false;
}
if (egl->procs.eglBindWaylandDisplayWL(egl->display, local_display)) {
egl->wl_display = local_display;
return true;
}
return false;
}
bool wlr_egl_destroy_image(struct wlr_egl *egl, EGLImage image) {
if (!egl->exts.image_base_khr) {
return false;
}
if (!image) {
return true;
}
return egl->procs.eglDestroyImageKHR(egl->display, image);
}
bool wlr_egl_make_current(struct wlr_egl *egl) {
if (!eglMakeCurrent(egl->display, EGL_NO_SURFACE, EGL_NO_SURFACE,
egl->context)) {
wlr_log(WLR_ERROR, "eglMakeCurrent failed");
return false;
}
return true;
}
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_is_current(struct wlr_egl *egl) {
return eglGetCurrentContext() == egl->context;
}
void wlr_egl_save_context(struct wlr_egl_context *context) {
context->display = eglGetCurrentDisplay();
context->context = eglGetCurrentContext();
context->draw_surface = eglGetCurrentSurface(EGL_DRAW);
context->read_surface = eglGetCurrentSurface(EGL_READ);
}
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_wl_drm(struct wlr_egl *egl,
struct wl_resource *data, EGLint *fmt, int *width, int *height,
bool *inverted_y) {
if (!egl->exts.bind_wayland_display_wl || !egl->exts.image_base_khr) {
return NULL;
}
if (!egl->procs.eglQueryWaylandBufferWL(egl->display, data,
EGL_TEXTURE_FORMAT, fmt)) {
return NULL;
}
egl->procs.eglQueryWaylandBufferWL(egl->display, data, EGL_WIDTH, width);
egl->procs.eglQueryWaylandBufferWL(egl->display, data, EGL_HEIGHT, height);
EGLint _inverted_y;
if (egl->procs.eglQueryWaylandBufferWL(egl->display, data,
EGL_WAYLAND_Y_INVERTED_WL, &_inverted_y)) {
*inverted_y = !!_inverted_y;
} else {
*inverted_y = false;
}
const EGLint attribs[] = {
EGL_WAYLAND_PLANE_WL, 0,
EGL_NONE,
};
return egl->procs.eglCreateImageKHR(egl->display, egl->context,
EGL_WAYLAND_BUFFER_WL, data, attribs);
}
EGLImageKHR wlr_egl_create_image_from_dmabuf(struct wlr_egl *egl,
struct wlr_dmabuf_attributes *attributes, bool *external_only) {
if (!egl->exts.image_base_khr || !egl->exts.image_dmabuf_import_ext) {
wlr_log(WLR_ERROR, "dmabuf import extension not present");
return NULL;
}
bool has_modifier = false;
// we assume the same way we assumed formats without the import_modifiers
// extension that mod_linear is supported. The special mod mod_invalid
// is sometimes used to signal modifier unawareness which is what we
// have here
if (attributes->modifier != DRM_FORMAT_MOD_INVALID &&
attributes->modifier != DRM_FORMAT_MOD_LINEAR) {
if (!egl->exts.image_dmabuf_import_modifiers_ext) {
wlr_log(WLR_ERROR, "dmabuf modifiers extension not present");
return NULL;
}
has_modifier = true;
}
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 (has_modifier) {
attribs[atti++] = attr_names[i].mod_lo;
attribs[atti++] = attributes->modifier & 0xFFFFFFFF;
attribs[atti++] = attr_names[i].mod_hi;
attribs[atti++] = attributes->modifier >> 32;
}
}
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, int **formats) {
if (!egl->exts.image_dmabuf_import_ext) {
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.image_dmabuf_import_modifiers_ext) {
static const int fallback_formats[] = {
DRM_FORMAT_ARGB8888,
DRM_FORMAT_XRGB8888,
};
static unsigned num = sizeof(fallback_formats) /
sizeof(fallback_formats[0]);
*formats = calloc(num, sizeof(int));
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(int));
if (*formats == NULL) {
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, int format,
uint64_t **modifiers, EGLBoolean **external_only) {
*modifiers = NULL;
*external_only = NULL;
if (!egl->exts.image_dmabuf_import_ext) {
wlr_log(WLR_DEBUG, "DMA-BUF extension not present");
return -1;
}
if (!egl->exts.image_dmabuf_import_modifiers_ext) {
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(uint64_t));
if (*modifiers == NULL) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
return -1;
}
*external_only = calloc(num, sizeof(EGLBoolean));
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) {
wlr_log(WLR_ERROR, "drmGetDevices2 failed");
return NULL;
}
drmDevice **devices = calloc(devices_len, sizeof(drmDevice *));
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);
wlr_log(WLR_ERROR, "drmGetDevices2 failed");
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;
}
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;
}
char *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;
}
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