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wlroots-hyprland/render/wlr_renderer.c
Simon Ser 49738406a3 render: don't fall back to Pixman if we have a render node 
If we have a render node, it means there is a GPU which could be
used. We probably failed GL because of a kernel or Mesa issue.
Instead of automatically falling back to Pixman, error out.

This makes it more obvious to users when something goes wrong,
instead of silently exposing a slow unaccelerated desktop.

References: https://github.com/swaywm/sway/issues/7194
2022-10-01 18:05:31 +02:00

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#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stdlib.h>
#include <unistd.h>
#include <wlr/render/interface.h>
#include <wlr/render/pixman.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/types/wlr_drm.h>
#include <wlr/types/wlr_linux_dmabuf_v1.h>
#include <wlr/types/wlr_matrix.h>
#include <wlr/util/box.h>
#include <wlr/util/log.h>
#include <xf86drm.h>
#include <wlr/config.h>
#if WLR_HAS_GLES2_RENDERER
#include <wlr/render/egl.h>
#include <wlr/render/gles2.h>
#endif
#if WLR_HAS_VULKAN_RENDERER
#include <wlr/render/vulkan.h>
#endif // WLR_HAS_VULKAN_RENDERER
#include "backend/backend.h"
#include "render/pixel_format.h"
#include "render/wlr_renderer.h"
#include "util/env.h"
void wlr_renderer_init(struct wlr_renderer *renderer,
const struct wlr_renderer_impl *impl) {
assert(impl->begin);
assert(impl->clear);
assert(impl->scissor);
assert(impl->render_subtexture_with_matrix);
assert(impl->render_quad_with_matrix);
assert(impl->get_shm_texture_formats);
assert(impl->get_render_buffer_caps);
memset(renderer, 0, sizeof(*renderer));
renderer->impl = impl;
wl_signal_init(&renderer->events.destroy);
}
void wlr_renderer_destroy(struct wlr_renderer *r) {
if (!r) {
return;
}
assert(!r->rendering);
wl_signal_emit_mutable(&r->events.destroy, r);
if (r->impl && r->impl->destroy) {
r->impl->destroy(r);
} else {
free(r);
}
}
bool renderer_bind_buffer(struct wlr_renderer *r, struct wlr_buffer *buffer) {
assert(!r->rendering);
if (!r->impl->bind_buffer) {
return false;
}
return r->impl->bind_buffer(r, buffer);
}
void wlr_renderer_begin(struct wlr_renderer *r, uint32_t width, uint32_t height) {
assert(!r->rendering);
r->impl->begin(r, width, height);
r->rendering = true;
}
bool wlr_renderer_begin_with_buffer(struct wlr_renderer *r,
struct wlr_buffer *buffer) {
if (!renderer_bind_buffer(r, buffer)) {
return false;
}
wlr_renderer_begin(r, buffer->width, buffer->height);
r->rendering_with_buffer = true;
return true;
}
void wlr_renderer_end(struct wlr_renderer *r) {
assert(r->rendering);
if (r->impl->end) {
r->impl->end(r);
}
r->rendering = false;
if (r->rendering_with_buffer) {
renderer_bind_buffer(r, NULL);
r->rendering_with_buffer = false;
}
}
void wlr_renderer_clear(struct wlr_renderer *r, const float color[static 4]) {
assert(r->rendering);
r->impl->clear(r, color);
}
void wlr_renderer_scissor(struct wlr_renderer *r, struct wlr_box *box) {
assert(r->rendering);
r->impl->scissor(r, box);
}
bool wlr_render_texture(struct wlr_renderer *r, struct wlr_texture *texture,
const float projection[static 9], int x, int y, float alpha) {
struct wlr_box box = {
.x = x,
.y = y,
.width = texture->width,
.height = texture->height,
};
float matrix[9];
wlr_matrix_project_box(matrix, &box, WL_OUTPUT_TRANSFORM_NORMAL, 0,
projection);
return wlr_render_texture_with_matrix(r, texture, matrix, alpha);
}
bool wlr_render_texture_with_matrix(struct wlr_renderer *r,
struct wlr_texture *texture, const float matrix[static 9],
float alpha) {
struct wlr_fbox box = {
.x = 0,
.y = 0,
.width = texture->width,
.height = texture->height,
};
return wlr_render_subtexture_with_matrix(r, texture, &box, matrix, alpha);
}
bool wlr_render_subtexture_with_matrix(struct wlr_renderer *r,
struct wlr_texture *texture, const struct wlr_fbox *box,
const float matrix[static 9], float alpha) {
assert(r->rendering);
return r->impl->render_subtexture_with_matrix(r, texture,
box, matrix, alpha);
}
void wlr_render_rect(struct wlr_renderer *r, const struct wlr_box *box,
const float color[static 4], const float projection[static 9]) {
if (box->width == 0 || box->height == 0) {
return;
}
assert(box->width > 0 && box->height > 0);
float matrix[9];
wlr_matrix_project_box(matrix, box, WL_OUTPUT_TRANSFORM_NORMAL, 0,
projection);
wlr_render_quad_with_matrix(r, color, matrix);
}
void wlr_render_quad_with_matrix(struct wlr_renderer *r,
const float color[static 4], const float matrix[static 9]) {
assert(r->rendering);
r->impl->render_quad_with_matrix(r, color, matrix);
}
const uint32_t *wlr_renderer_get_shm_texture_formats(struct wlr_renderer *r,
size_t *len) {
return r->impl->get_shm_texture_formats(r, len);
}
const struct wlr_drm_format_set *wlr_renderer_get_dmabuf_texture_formats(
struct wlr_renderer *r) {
if (!r->impl->get_dmabuf_texture_formats) {
return NULL;
}
return r->impl->get_dmabuf_texture_formats(r);
}
const struct wlr_drm_format_set *wlr_renderer_get_render_formats(
struct wlr_renderer *r) {
if (!r->impl->get_render_formats) {
return NULL;
}
return r->impl->get_render_formats(r);
}
uint32_t renderer_get_render_buffer_caps(struct wlr_renderer *r) {
return r->impl->get_render_buffer_caps(r);
}
bool wlr_renderer_read_pixels(struct wlr_renderer *r, uint32_t fmt,
uint32_t *flags, uint32_t stride, uint32_t width, uint32_t height,
uint32_t src_x, uint32_t src_y, uint32_t dst_x, uint32_t dst_y,
void *data) {
if (!r->impl->read_pixels) {
return false;
}
return r->impl->read_pixels(r, fmt, flags, stride, width, height,
src_x, src_y, dst_x, dst_y, data);
}
bool wlr_renderer_init_wl_shm(struct wlr_renderer *r,
struct wl_display *wl_display) {
if (wl_display_init_shm(wl_display) != 0) {
wlr_log(WLR_ERROR, "Failed to initialize wl_shm");
return false;
}
size_t len;
const uint32_t *formats = wlr_renderer_get_shm_texture_formats(r, &len);
if (formats == NULL) {
wlr_log(WLR_ERROR, "Failed to initialize wl_shm: "
"cannot get renderer formats");
return false;
}
bool argb8888 = false, xrgb8888 = false;
for (size_t i = 0; i < len; ++i) {
// ARGB8888 and XRGB8888 must be supported and are implicitly
// advertised by wl_display_init_shm
enum wl_shm_format fmt = convert_drm_format_to_wl_shm(formats[i]);
switch (fmt) {
case WL_SHM_FORMAT_ARGB8888:
argb8888 = true;
break;
case WL_SHM_FORMAT_XRGB8888:
xrgb8888 = true;
break;
default:
if (wl_display_add_shm_format(wl_display, fmt) == NULL) {
wlr_log(WLR_ERROR, "Failed to initialize wl_shm: "
"failed to add format");
return false;
}
}
}
assert(argb8888 && xrgb8888);
return true;
}
bool wlr_renderer_init_wl_display(struct wlr_renderer *r,
struct wl_display *wl_display) {
if (!wlr_renderer_init_wl_shm(r, wl_display)) {
return false;
}
if (wlr_renderer_get_dmabuf_texture_formats(r) != NULL) {
if (wlr_renderer_get_drm_fd(r) >= 0) {
if (wlr_drm_create(wl_display, r) == NULL) {
return false;
}
} else {
wlr_log(WLR_INFO, "Cannot get renderer DRM FD, disabling wl_drm");
}
if (wlr_linux_dmabuf_v1_create(wl_display, r) == NULL) {
return false;
}
}
return true;
}
static void log_creation_failure(bool is_auto, const char *msg) {
wlr_log(is_auto ? WLR_DEBUG : WLR_ERROR, "%s%s", msg, is_auto ? ". Skipping!" : "");
}
struct wlr_renderer *renderer_autocreate_with_drm_fd(int drm_fd) {
const char *renderer_options[] = {
"auto",
#if WLR_HAS_GLES2_RENDERER
"gles2",
#endif
#if WLR_HAS_VULKAN_RENDERER
"vulkan",
#endif
"pixman",
NULL
};
const char *renderer_name = renderer_options[env_parse_switch("WLR_RENDERER", renderer_options)];
bool is_auto = strcmp(renderer_name, "auto") == 0;
struct wlr_renderer *renderer = NULL;
#if WLR_HAS_GLES2_RENDERER
if (!renderer && (is_auto || strcmp(renderer_name, "gles2") == 0)) {
if (drm_fd < 0) {
log_creation_failure(is_auto, "Cannot create GLES2 renderer: no DRM FD available");
} else {
renderer = wlr_gles2_renderer_create_with_drm_fd(drm_fd);
if (!renderer) {
log_creation_failure(is_auto, "Failed to create a GLES2 renderer");
}
}
}
#endif
#if WLR_HAS_VULKAN_RENDERER
if (!renderer && strcmp(renderer_name, "vulkan") == 0) {
if (drm_fd < 0) {
log_creation_failure(is_auto, "Cannot create Vulkan renderer: no DRM FD available");
} else {
renderer = wlr_vk_renderer_create_with_drm_fd(drm_fd);
if (!renderer) {
log_creation_failure(is_auto, "Failed to create a Vulkan renderer");
}
}
}
#endif
bool has_render_node = false;
if (!renderer && is_auto && drm_fd >= 0) {
char *render_node = drmGetRenderDeviceNameFromFd(drm_fd);
has_render_node = render_node != NULL;
free(render_node);
}
if (!renderer && ((is_auto && !has_render_node) ||
strcmp(renderer_name, "pixman") == 0)) {
renderer = wlr_pixman_renderer_create();
if (!renderer) {
log_creation_failure(is_auto, "Failed to create a pixman renderer");
}
}
if (!renderer) {
wlr_log(WLR_ERROR, "Could not initialize renderer");
}
return renderer;
}
static int open_drm_render_node(void) {
uint32_t flags = 0;
int devices_len = drmGetDevices2(flags, NULL, 0);
if (devices_len < 0) {
wlr_log(WLR_ERROR, "drmGetDevices2 failed: %s", strerror(-devices_len));
return -1;
}
drmDevice **devices = calloc(devices_len, sizeof(drmDevice *));
if (devices == NULL) {
wlr_log_errno(WLR_ERROR, "Allocation failed");
return -1;
}
devices_len = drmGetDevices2(flags, devices, devices_len);
if (devices_len < 0) {
free(devices);
wlr_log(WLR_ERROR, "drmGetDevices2 failed: %s", strerror(-devices_len));
return -1;
}
int fd = -1;
for (int i = 0; i < devices_len; i++) {
drmDevice *dev = devices[i];
if (dev->available_nodes & (1 << DRM_NODE_RENDER)) {
const char *name = dev->nodes[DRM_NODE_RENDER];
wlr_log(WLR_DEBUG, "Opening DRM render node '%s'", name);
fd = open(name, O_RDWR | O_CLOEXEC);
if (fd < 0) {
wlr_log_errno(WLR_ERROR, "Failed to open '%s'", name);
goto out;
}
break;
}
}
if (fd < 0) {
wlr_log(WLR_ERROR, "Failed to find any DRM render node");
}
out:
for (int i = 0; i < devices_len; i++) {
drmFreeDevice(&devices[i]);
}
free(devices);
return fd;
}
struct wlr_renderer *wlr_renderer_autocreate(struct wlr_backend *backend) {
int drm_fd = -1;
int render_drm_fd = -1;
// Allow the user to override the render node
const char *render_name = getenv("WLR_RENDER_DRM_DEVICE");
if (render_name != NULL) {
wlr_log(WLR_INFO,
"Opening DRM render node '%s' from WLR_RENDER_DRM_DEVICE",
render_name);
render_drm_fd = open(render_name, O_RDWR | O_CLOEXEC);
if (render_drm_fd < 0) {
wlr_log_errno(WLR_ERROR, "Failed to open '%s'", render_name);
return NULL;
}
if (drmGetNodeTypeFromFd(render_drm_fd) != DRM_NODE_RENDER) {
wlr_log(WLR_ERROR, "'%s' is not a DRM render node", render_name);
close(render_drm_fd);
return NULL;
}
drm_fd = render_drm_fd;
}
if (drm_fd < 0) {
drm_fd = wlr_backend_get_drm_fd(backend);
}
// If the backend hasn't picked a DRM FD, but accepts DMA-BUFs, pick an
// arbitrary render node
uint32_t backend_caps = backend_get_buffer_caps(backend);
if (drm_fd < 0 && (backend_caps & WLR_BUFFER_CAP_DMABUF) != 0) {
render_drm_fd = open_drm_render_node();
drm_fd = render_drm_fd;
}
// Note, drm_fd may be negative if unavailable
struct wlr_renderer *renderer = renderer_autocreate_with_drm_fd(drm_fd);
if (render_drm_fd >= 0) {
close(render_drm_fd);
}
return renderer;
}
int wlr_renderer_get_drm_fd(struct wlr_renderer *r) {
if (!r->impl->get_drm_fd) {
return -1;
}
return r->impl->get_drm_fd(r);
}
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