wlroots-hyprland/render/wlr_renderer.c

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#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <fcntl.h>
#include <stdbool.h>
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#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_shm.h>
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#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"
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#include "util/env.h"
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void wlr_renderer_init(struct wlr_renderer *renderer,
const struct wlr_renderer_impl *impl) {
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assert(impl->begin_buffer_pass);
assert(impl->get_shm_texture_formats);
assert(impl->get_render_buffer_caps);
*renderer = (struct wlr_renderer){
.impl = impl,
};
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wl_signal_init(&renderer->events.destroy);
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wl_signal_init(&renderer->events.lost);
}
void wlr_renderer_destroy(struct wlr_renderer *r) {
if (!r) {
return;
}
assert(!r->rendering);
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wl_signal_emit_mutable(&r->events.destroy, r);
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if (r->impl && r->impl->destroy) {
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r->impl->destroy(r);
} else {
free(r);
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}
}
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);
}
bool wlr_renderer_begin(struct wlr_renderer *r, uint32_t width, uint32_t height) {
assert(!r->rendering);
if (!r->impl->begin(r, width, height)) {
return false;
}
r->rendering = true;
return true;
}
bool wlr_renderer_begin_with_buffer(struct wlr_renderer *r,
struct wlr_buffer *buffer) {
if (!renderer_bind_buffer(r, buffer)) {
return false;
}
if (!wlr_renderer_begin(r, buffer->width, buffer->height)) {
renderer_bind_buffer(r, NULL);
return false;
}
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;
}
}
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);
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}
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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;
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}
return r->impl->get_dmabuf_texture_formats(r);
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}
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 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, stride, width, height,
src_x, src_y, dst_x, dst_y, data);
}
bool wlr_renderer_init_wl_shm(struct wlr_renderer *r,
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struct wl_display *wl_display) {
return wlr_shm_create_with_renderer(wl_display, 1, r) != NULL;
}
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_with_renderer(wl_display, 4, r) == NULL) {
return false;
}
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}
return true;
}
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(*devices));
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;
}
static bool open_preferred_drm_fd(struct wlr_backend *backend, int *drm_fd_ptr,
bool *own_drm_fd) {
if (*drm_fd_ptr >= 0) {
return true;
}
// 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);
int drm_fd = open(render_name, O_RDWR | O_CLOEXEC);
if (drm_fd < 0) {
wlr_log_errno(WLR_ERROR, "Failed to open '%s'", render_name);
return false;
}
if (drmGetNodeTypeFromFd(drm_fd) != DRM_NODE_RENDER) {
wlr_log(WLR_ERROR, "'%s' is not a DRM render node", render_name);
close(drm_fd);
return false;
}
*drm_fd_ptr = drm_fd;
*own_drm_fd = true;
return true;
}
// Prefer the backend's DRM node, if any
int backend_drm_fd = wlr_backend_get_drm_fd(backend);
if (backend_drm_fd >= 0) {
*drm_fd_ptr = backend_drm_fd;
*own_drm_fd = false;
return true;
}
// 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 (backend_caps & WLR_BUFFER_CAP_DMABUF) {
int drm_fd = open_drm_render_node();
if (drm_fd < 0) {
return false;
}
*drm_fd_ptr = drm_fd;
*own_drm_fd = true;
return true;
}
return false;
}
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!" : "");
}
static bool has_render_node(struct wlr_backend *backend) {
if (!backend) {
return false;
}
int backend_drm_fd = wlr_backend_get_drm_fd(backend);
if (backend_drm_fd < 0) {
return false;
}
char *render_node = drmGetRenderDeviceNameFromFd(backend_drm_fd);
bool has_render_node = render_node != NULL;
free(render_node);
return has_render_node;
}
static struct wlr_renderer *renderer_autocreate(struct wlr_backend *backend, int drm_fd) {
const char *renderer_options[] = {
"auto",
"gles2",
"vulkan",
"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;
bool own_drm_fd = false;
if ((is_auto && WLR_HAS_GLES2_RENDERER) || strcmp(renderer_name, "gles2") == 0) {
if (!open_preferred_drm_fd(backend, &drm_fd, &own_drm_fd)) {
log_creation_failure(is_auto, "Cannot create GLES2 renderer: no DRM FD available");
} else {
#if WLR_HAS_GLES2_RENDERER
renderer = wlr_gles2_renderer_create_with_drm_fd(drm_fd);
#else
wlr_log(WLR_ERROR, "Cannot create GLES renderer: disabled at compile-time");
#endif
if (renderer) {
goto out;
} else {
log_creation_failure(is_auto, "Failed to create a GLES2 renderer");
}
}
}
if (strcmp(renderer_name, "vulkan") == 0) {
if (!open_preferred_drm_fd(backend, &drm_fd, &own_drm_fd)) {
log_creation_failure(is_auto, "Cannot create Vulkan renderer: no DRM FD available");
} else {
#if WLR_HAS_VULKAN_RENDERER
renderer = wlr_vk_renderer_create_with_drm_fd(drm_fd);
#else
wlr_log(WLR_ERROR, "Cannot create Vulkan renderer: disabled at compile-time");
#endif
if (renderer) {
goto out;
} else {
log_creation_failure(is_auto, "Failed to create a Vulkan renderer");
}
}
}
if ((is_auto && !has_render_node(backend)) || strcmp(renderer_name, "pixman") == 0) {
renderer = wlr_pixman_renderer_create();
if (renderer) {
goto out;
} else {
log_creation_failure(is_auto, "Failed to create a pixman renderer");
}
}
out:
if (renderer == NULL) {
wlr_log(WLR_ERROR, "Could not initialize renderer");
}
if (own_drm_fd && drm_fd >= 0) {
close(drm_fd);
}
return renderer;
}
struct wlr_renderer *renderer_autocreate_with_drm_fd(int drm_fd) {
assert(drm_fd >= 0);
return renderer_autocreate(NULL, drm_fd);
}
struct wlr_renderer *wlr_renderer_autocreate(struct wlr_backend *backend) {
return renderer_autocreate(backend, -1);
}
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);
}
struct wlr_render_pass *wlr_renderer_begin_buffer_pass(struct wlr_renderer *renderer,
struct wlr_buffer *buffer, const struct wlr_buffer_pass_options *options) {
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struct wlr_buffer_pass_options default_options = {0};
if (!options) {
options = &default_options;
}
return renderer->impl->begin_buffer_pass(renderer, buffer, options);
}
struct wlr_render_timer *wlr_render_timer_create(struct wlr_renderer *renderer) {
if (!renderer->impl->render_timer_create) {
return NULL;
}
return renderer->impl->render_timer_create(renderer);
}
int wlr_render_timer_get_duration_ns(struct wlr_render_timer *timer) {
if (!timer->impl->get_duration_ns) {
return -1;
}
return timer->impl->get_duration_ns(timer);
}
void wlr_render_timer_destroy(struct wlr_render_timer *timer) {
if (!timer->impl->destroy) {
return;
}
timer->impl->destroy(timer);
}