mirror of
https://gitlab.freedesktop.org/wlroots/wlroots.git
synced 2025-11-03 09:01:40 -05:00
329 lines
8.3 KiB
C
329 lines
8.3 KiB
C
#include <assert.h>
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#include <fcntl.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <wlr/render/interface.h>
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#include <wlr/render/pixman.h>
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#include <wlr/render/wlr_renderer.h>
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#include <wlr/types/wlr_drm.h>
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#include <wlr/types/wlr_linux_dmabuf_v1.h>
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#include <wlr/types/wlr_shm.h>
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#include <wlr/util/box.h>
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#include <wlr/util/log.h>
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#include <xf86drm.h>
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#include <wlr/config.h>
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#if WLR_HAS_GLES2_RENDERER
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#include <wlr/render/egl.h>
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#include <wlr/render/gles2.h>
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#endif
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#if WLR_HAS_VULKAN_RENDERER
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#include <wlr/render/vulkan.h>
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#endif // WLR_HAS_VULKAN_RENDERER
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#include "backend/backend.h"
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#include "render/pixel_format.h"
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#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,
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const struct wlr_renderer_impl *impl, uint32_t render_buffer_caps) {
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assert(impl->begin_buffer_pass);
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assert(impl->get_texture_formats);
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assert(render_buffer_caps != 0);
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*renderer = (struct wlr_renderer){
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.impl = impl,
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.render_buffer_caps = render_buffer_caps,
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};
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wl_signal_init(&renderer->events.destroy);
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wl_signal_init(&renderer->events.lost);
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}
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void wlr_renderer_destroy(struct wlr_renderer *r) {
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if (!r) {
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return;
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}
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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);
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} else {
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free(r);
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}
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}
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const struct wlr_drm_format_set *wlr_renderer_get_texture_formats(
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struct wlr_renderer *r, uint32_t buffer_caps) {
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return r->impl->get_texture_formats(r, buffer_caps);
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}
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const struct wlr_drm_format_set *wlr_renderer_get_render_formats(
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struct wlr_renderer *r) {
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if (!r->impl->get_render_formats) {
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return NULL;
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}
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return r->impl->get_render_formats(r);
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}
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bool wlr_renderer_init_wl_shm(struct wlr_renderer *r,
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struct wl_display *wl_display) {
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return wlr_shm_create_with_renderer(wl_display, 2, r) != NULL;
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}
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bool wlr_renderer_init_wl_display(struct wlr_renderer *r,
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struct wl_display *wl_display) {
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if (!wlr_renderer_init_wl_shm(r, wl_display)) {
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return false;
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}
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if (wlr_renderer_get_texture_formats(r, WLR_BUFFER_CAP_DMABUF) != NULL &&
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wlr_renderer_get_drm_fd(r) >= 0 &&
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wlr_linux_dmabuf_v1_create_with_renderer(wl_display, 4, r) == NULL) {
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return false;
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}
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return true;
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}
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static int open_drm_render_node(void) {
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uint32_t flags = 0;
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int devices_len = drmGetDevices2(flags, NULL, 0);
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if (devices_len < 0) {
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wlr_log(WLR_ERROR, "drmGetDevices2 failed: %s", strerror(-devices_len));
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return -1;
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}
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drmDevice **devices = calloc(devices_len, sizeof(*devices));
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if (devices == NULL) {
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wlr_log_errno(WLR_ERROR, "Allocation failed");
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return -1;
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}
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devices_len = drmGetDevices2(flags, devices, devices_len);
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if (devices_len < 0) {
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free(devices);
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wlr_log(WLR_ERROR, "drmGetDevices2 failed: %s", strerror(-devices_len));
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return -1;
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}
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int fd = -1;
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for (int i = 0; i < devices_len; i++) {
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drmDevice *dev = devices[i];
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if (dev->available_nodes & (1 << DRM_NODE_RENDER)) {
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const char *name = dev->nodes[DRM_NODE_RENDER];
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wlr_log(WLR_DEBUG, "Opening DRM render node '%s'", name);
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fd = open(name, O_RDWR | O_CLOEXEC);
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if (fd < 0) {
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wlr_log_errno(WLR_ERROR, "Failed to open '%s'", name);
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goto out;
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}
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break;
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}
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}
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if (fd < 0) {
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wlr_log(WLR_ERROR, "Failed to find any DRM render node");
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}
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out:
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for (int i = 0; i < devices_len; i++) {
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drmFreeDevice(&devices[i]);
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}
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free(devices);
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return fd;
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}
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static bool open_preferred_drm_fd(struct wlr_backend *backend, int *drm_fd_ptr,
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bool *own_drm_fd) {
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if (*drm_fd_ptr >= 0) {
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return true;
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}
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// Allow the user to override the render node
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const char *render_name = getenv("WLR_RENDER_DRM_DEVICE");
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if (render_name != NULL) {
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wlr_log(WLR_INFO,
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"Opening DRM render node '%s' from WLR_RENDER_DRM_DEVICE",
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render_name);
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int drm_fd = open(render_name, O_RDWR | O_CLOEXEC);
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if (drm_fd < 0) {
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wlr_log_errno(WLR_ERROR, "Failed to open '%s'", render_name);
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return false;
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}
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if (drmGetNodeTypeFromFd(drm_fd) != DRM_NODE_RENDER) {
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wlr_log(WLR_ERROR, "'%s' is not a DRM render node", render_name);
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close(drm_fd);
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return false;
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}
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*drm_fd_ptr = drm_fd;
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*own_drm_fd = true;
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return true;
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}
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// Prefer the backend's DRM node, if any
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int backend_drm_fd = wlr_backend_get_drm_fd(backend);
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if (backend_drm_fd >= 0) {
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*drm_fd_ptr = backend_drm_fd;
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*own_drm_fd = false;
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return true;
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}
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// If the backend hasn't picked a DRM FD, but accepts DMA-BUFs, pick an
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// arbitrary render node
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uint32_t backend_caps = backend_get_buffer_caps(backend);
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if (backend_caps & WLR_BUFFER_CAP_DMABUF) {
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int drm_fd = open_drm_render_node();
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if (drm_fd < 0) {
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return false;
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}
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*drm_fd_ptr = drm_fd;
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*own_drm_fd = true;
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return true;
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}
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return false;
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}
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static void log_creation_failure(bool is_auto, const char *msg) {
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wlr_log(is_auto ? WLR_DEBUG : WLR_ERROR, "%s%s", msg, is_auto ? ". Skipping!" : "");
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}
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static bool has_render_node(struct wlr_backend *backend) {
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if (!backend) {
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return false;
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}
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int backend_drm_fd = wlr_backend_get_drm_fd(backend);
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if (backend_drm_fd < 0) {
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return false;
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}
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char *render_node = drmGetRenderDeviceNameFromFd(backend_drm_fd);
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bool has_render_node = render_node != NULL;
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free(render_node);
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return has_render_node;
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}
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static struct wlr_renderer *renderer_autocreate(struct wlr_backend *backend, int drm_fd) {
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const char *renderer_options[] = {
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"auto",
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"gles2",
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"vulkan",
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"pixman",
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NULL
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};
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const char *renderer_name = renderer_options[env_parse_switch("WLR_RENDERER", renderer_options)];
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bool is_auto = strcmp(renderer_name, "auto") == 0;
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struct wlr_renderer *renderer = NULL;
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bool own_drm_fd = false;
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if ((is_auto && WLR_HAS_GLES2_RENDERER) || strcmp(renderer_name, "gles2") == 0) {
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if (!open_preferred_drm_fd(backend, &drm_fd, &own_drm_fd)) {
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log_creation_failure(is_auto, "Cannot create GLES2 renderer: no DRM FD available");
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} else {
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#if WLR_HAS_GLES2_RENDERER
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renderer = wlr_gles2_renderer_create_with_drm_fd(drm_fd);
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#else
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wlr_log(WLR_ERROR, "Cannot create GLES renderer: disabled at compile-time");
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#endif
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if (renderer) {
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goto out;
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} else {
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log_creation_failure(is_auto, "Failed to create a GLES2 renderer");
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}
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}
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}
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if (strcmp(renderer_name, "vulkan") == 0) {
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if (!open_preferred_drm_fd(backend, &drm_fd, &own_drm_fd)) {
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log_creation_failure(is_auto, "Cannot create Vulkan renderer: no DRM FD available");
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} else {
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#if WLR_HAS_VULKAN_RENDERER
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renderer = wlr_vk_renderer_create_with_drm_fd(drm_fd);
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#else
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wlr_log(WLR_ERROR, "Cannot create Vulkan renderer: disabled at compile-time");
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#endif
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if (renderer) {
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goto out;
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} else {
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log_creation_failure(is_auto, "Failed to create a Vulkan renderer");
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}
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}
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}
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if ((is_auto && !has_render_node(backend)) || strcmp(renderer_name, "pixman") == 0) {
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renderer = wlr_pixman_renderer_create();
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if (renderer) {
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goto out;
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} else {
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log_creation_failure(is_auto, "Failed to create a pixman renderer");
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}
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}
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out:
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if (renderer == NULL) {
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wlr_log(WLR_ERROR, "Could not initialize renderer");
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}
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if (own_drm_fd && drm_fd >= 0) {
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close(drm_fd);
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}
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if (renderer != NULL && env_parse_bool("WLR_RENDER_NO_EXPLICIT_SYNC")) {
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renderer->features.timeline = false;
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}
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return renderer;
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}
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struct wlr_renderer *renderer_autocreate_with_drm_fd(int drm_fd) {
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assert(drm_fd >= 0);
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return renderer_autocreate(NULL, drm_fd);
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}
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struct wlr_renderer *wlr_renderer_autocreate(struct wlr_backend *backend) {
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return renderer_autocreate(backend, -1);
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}
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int wlr_renderer_get_drm_fd(struct wlr_renderer *r) {
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if (!r->impl->get_drm_fd) {
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return -1;
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}
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return r->impl->get_drm_fd(r);
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}
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struct wlr_render_pass *wlr_renderer_begin_buffer_pass(struct wlr_renderer *renderer,
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struct wlr_buffer *buffer, const struct wlr_buffer_pass_options *options) {
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struct wlr_buffer_pass_options default_options = {0};
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if (!options) {
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options = &default_options;
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}
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return renderer->impl->begin_buffer_pass(renderer, buffer, options);
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}
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struct wlr_render_timer *wlr_render_timer_create(struct wlr_renderer *renderer) {
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if (!renderer->impl->render_timer_create) {
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return NULL;
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}
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return renderer->impl->render_timer_create(renderer);
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}
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int wlr_render_timer_get_duration_ns(struct wlr_render_timer *timer) {
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if (!timer->impl->get_duration_ns) {
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return -1;
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}
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return timer->impl->get_duration_ns(timer);
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}
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void wlr_render_timer_destroy(struct wlr_render_timer *timer) {
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if (!timer->impl->destroy) {
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return;
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}
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timer->impl->destroy(timer);
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}
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