Inital commit of libotd.
This commit is contained in:
Scott Anderson
parent
1aed987301
commit
aca13320b3
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@ -0,0 +1,466 @@
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#include "otd.h"
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#include "drm.h"
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#include "event.h"
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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#include <errno.h>
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#include <xf86drm.h>
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#include <xf86drmMode.h>
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#include <drm_mode.h>
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#include <EGL/egl.h>
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#include <EGL/eglext.h>
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#include <gbm.h>
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#include <GLES3/gl3.h>
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static const char *conn_name[] = {
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[DRM_MODE_CONNECTOR_Unknown] = "Unknown",
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[DRM_MODE_CONNECTOR_VGA] = "VGA",
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[DRM_MODE_CONNECTOR_DVII] = "DVI-I",
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[DRM_MODE_CONNECTOR_DVID] = "DVI-D",
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[DRM_MODE_CONNECTOR_DVIA] = "DVI-A",
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[DRM_MODE_CONNECTOR_Composite] = "Composite",
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[DRM_MODE_CONNECTOR_SVIDEO] = "SVIDEO",
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[DRM_MODE_CONNECTOR_LVDS] = "LVDS",
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[DRM_MODE_CONNECTOR_Component] = "Component",
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[DRM_MODE_CONNECTOR_9PinDIN] = "DIN",
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[DRM_MODE_CONNECTOR_DisplayPort] = "DP",
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[DRM_MODE_CONNECTOR_HDMIA] = "HDMI-A",
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[DRM_MODE_CONNECTOR_HDMIB] = "HDMI-B",
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[DRM_MODE_CONNECTOR_TV] = "TV",
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[DRM_MODE_CONNECTOR_eDP] = "eDP",
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[DRM_MODE_CONNECTOR_VIRTUAL] = "Virtual",
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[DRM_MODE_CONNECTOR_DSI] = "DSI",
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};
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// EGL extensions
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PFNEGLGETPLATFORMDISPLAYEXTPROC get_platform_display;
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PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC create_platform_window_surface;
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static bool egl_exts()
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{
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get_platform_display = (PFNEGLGETPLATFORMDISPLAYEXTPROC)
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eglGetProcAddress("eglGetPlatformDisplayEXT");
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create_platform_window_surface = (PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC)
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eglGetProcAddress("eglCreatePlatformWindowSurfaceEXT");
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return get_platform_display && create_platform_window_surface;
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}
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bool egl_get_config(EGLDisplay disp, EGLConfig *out)
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{
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EGLint count = 0, matched = 0, ret;
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ret = eglGetConfigs(disp, NULL, 0, &count);
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if (ret == EGL_FALSE || count == 0) {
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return false;
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}
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EGLConfig configs[count];
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ret = eglChooseConfig(disp, NULL, configs, count, &matched);
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if (ret == EGL_FALSE) {
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return false;
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}
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for (int i = 0; i < matched; ++i) {
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EGLint gbm_format;
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if (!eglGetConfigAttrib(disp,
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configs[i],
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EGL_NATIVE_VISUAL_ID,
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&gbm_format))
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continue;
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if (gbm_format == GBM_FORMAT_XRGB8888) {
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*out = configs[i];
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return true;
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}
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}
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return false;
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}
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bool init_renderer(struct otd *otd)
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{
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if (!egl_exts()) {
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fprintf(stderr, "Could not get EGL extensions\n");
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return false;
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}
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otd->gbm = gbm_create_device(otd->fd);
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if (!otd->gbm) {
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fprintf(stderr, "Could not create gbm device: %s\n", strerror(errno));
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return false;
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}
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if (eglBindAPI(EGL_OPENGL_ES_API) == EGL_FALSE) {
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fprintf(stderr, "Could not bind GLES3 API\n");
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goto error_gbm;
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}
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otd->egl.disp = get_platform_display(EGL_PLATFORM_GBM_MESA, otd->gbm, NULL);
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if (otd->egl.disp == EGL_NO_DISPLAY) {
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fprintf(stderr, "Could not create EGL display\n");
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goto error_gbm;
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}
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if (eglInitialize(otd->egl.disp, NULL, NULL) == EGL_FALSE) {
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fprintf(stderr, "Could not initalise EGL\n");
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goto error_egl;
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}
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if (!egl_get_config(otd->egl.disp, &otd->egl.conf)) {
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fprintf(stderr, "Could not get EGL config\n");
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goto error_egl;
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}
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static const EGLint attribs[] = {EGL_CONTEXT_CLIENT_VERSION, 3, EGL_NONE};
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otd->egl.context = eglCreateContext(otd->egl.disp, otd->egl.conf, EGL_NO_CONTEXT, attribs);
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if (otd->egl.context == EGL_NO_CONTEXT) {
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fprintf(stderr, "Could not create EGL context\n");
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goto error_egl;
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}
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return true;
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error_egl:
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eglTerminate(otd->egl.disp);
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eglReleaseThread();
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eglMakeCurrent(EGL_NO_DISPLAY, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
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error_gbm:
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gbm_device_destroy(otd->gbm);
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return false;
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}
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void destroy_renderer(struct otd *otd)
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{
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if (!otd)
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return;
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eglDestroyContext(otd->egl.disp, otd->egl.context);
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eglTerminate(otd->egl.disp);
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eglReleaseThread();
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eglMakeCurrent(EGL_NO_DISPLAY, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
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gbm_device_destroy(otd->gbm);
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}
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void scan_connectors(struct otd *otd)
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{
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drmModeRes *res = drmModeGetResources(otd->fd);
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if (!res)
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return;
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// I don't know if this needs to be allocated with realloc like this,
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// as it may not even be possible for the number of connectors to change.
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// I'll just have to see how DisplayPort MST works with DRM.
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if ((size_t)res->count_connectors > otd->display_len) {
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struct otd_display *new = realloc(otd->displays, sizeof *new * res->count_connectors);
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if (!new)
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goto error;
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for (int i = otd->display_len; i < res->count_connectors; ++i) {
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new[i] = (struct otd_display) {
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.state = OTD_DISP_INVALID,
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.otd = otd,
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};
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}
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otd->display_len = res->count_connectors;
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otd->displays = new;
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}
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for (int i = 0; i < res->count_connectors; ++i) {
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struct otd_display *disp = &otd->displays[i];
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drmModeConnector *conn = drmModeGetConnector(otd->fd, res->connectors[i]);
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if (!conn)
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continue;
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if (otd->displays[i].state == OTD_DISP_INVALID) {
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disp->state = OTD_DISP_DISCONNECTED;
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disp->connector = res->connectors[i];
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snprintf(disp->name, sizeof disp->name, "%s-%"PRIu32,
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conn_name[conn->connector_type],
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conn->connector_type_id);
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}
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if (disp->state == OTD_DISP_DISCONNECTED &&
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conn->connection == DRM_MODE_CONNECTED) {
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disp->state = OTD_DISP_NEEDS_MODESET;
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event_add(otd, disp, OTD_EV_DISPLAY_ADD);
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} else if (disp->state == OTD_DISP_CONNECTED &&
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conn->connection != DRM_MODE_CONNECTED) {
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disp->state = OTD_DISP_DISCONNECTED;
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event_add(otd, disp, OTD_EV_DISPLAY_REM);
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}
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drmModeFreeConnector(conn);
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}
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error:
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drmModeFreeResources(res);
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}
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static void free_fb(struct gbm_bo *bo, void *data)
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{
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uint32_t *id = data;
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if (id && *id)
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drmModeRmFB(gbm_bo_get_fd(bo), *id);
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free(id);
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}
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static uint32_t get_fb_for_bo(int fd, struct gbm_bo *bo)
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{
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uint32_t *id = gbm_bo_get_user_data(bo);
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if (id)
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return *id;
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id = calloc(1, sizeof *id);
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if (!id)
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return 0;
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drmModeAddFB(fd, gbm_bo_get_width(bo), gbm_bo_get_height(bo), 24, 32,
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gbm_bo_get_stride(bo), gbm_bo_get_handle(bo).u32, id);
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gbm_bo_set_user_data(bo, id, free_fb);
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return *id;
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}
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static void init_display_renderer(struct otd *otd, struct otd_display *disp)
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{
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disp->gbm = gbm_surface_create(otd->gbm,
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disp->width, disp->height,
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GBM_FORMAT_XRGB8888,
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GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING);
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if (!disp->gbm)
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return;
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disp->egl = create_platform_window_surface(otd->egl.disp, otd->egl.conf,
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disp->gbm, NULL);
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if (disp->egl == EGL_NO_SURFACE)
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return;
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// Render black frame
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eglMakeCurrent(otd->egl.disp, disp->egl, disp->egl, otd->egl.context);
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glViewport(0, 0, disp->width, disp->height);
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glClearColor(0.0, 0.0, 0.0, 1.0);
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glClear(GL_COLOR_BUFFER_BIT);
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eglSwapBuffers(otd->egl.disp, disp->egl);
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struct gbm_bo *bo = gbm_surface_lock_front_buffer(disp->gbm);
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uint32_t fb_id = get_fb_for_bo(otd->fd, bo);
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drmModeSetCrtc(otd->fd, disp->crtc, fb_id, 0, 0,
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&disp->connector, 1, disp->active_mode);
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drmModePageFlip(otd->fd, disp->crtc, fb_id, DRM_MODE_PAGE_FLIP_EVENT, disp);
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gbm_surface_release_buffer(disp->gbm, bo);
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}
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static drmModeModeInfo *select_mode(size_t num_modes,
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drmModeModeInfo modes[static num_modes],
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drmModeCrtc *old_crtc,
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const char *str)
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{
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if (strcmp(str, "preferred") == 0)
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return &modes[0];
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if (strcmp(str, "current") == 0) {
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if (!old_crtc) {
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fprintf(stderr, "Display does not have currently configured mode\n");
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return NULL;
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}
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for (size_t i = 0; i < num_modes; ++i) {
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if (memcmp(&modes[i], &old_crtc->mode, sizeof modes[0]) == 0)
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return &modes[i];
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}
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// We should never get here
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assert(0);
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}
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unsigned width = 0;
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unsigned height = 0;
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unsigned rate = 0;
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int ret;
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if ((ret = sscanf(str, "%ux%u@%u", &width, &height, &rate)) != 2 && ret != 3) {
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fprintf(stderr, "Invalid modesetting string\n");
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return NULL;
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}
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for (size_t i = 0; i < num_modes; ++i) {
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if (modes[i].hdisplay == width &&
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modes[i].vdisplay == height &&
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(!rate || modes[i].vrefresh == rate))
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return &modes[i];
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}
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return NULL;
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}
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bool modeset_str(struct otd *otd, struct otd_display *disp, const char *str)
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{
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drmModeConnector *conn = drmModeGetConnector(otd->fd, disp->connector);
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if (!conn || conn->connection != DRM_MODE_CONNECTED || conn->count_modes == 0)
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goto error;
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disp->num_modes = conn->count_modes;
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disp->modes = malloc(sizeof *disp->modes * disp->num_modes);
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if (!disp->modes)
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goto error;
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memcpy(disp->modes, conn->modes, sizeof *disp->modes * disp->num_modes);
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drmModeEncoder *curr_enc = drmModeGetEncoder(otd->fd, conn->encoder_id);
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if (curr_enc) {
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disp->old_crtc = drmModeGetCrtc(otd->fd, curr_enc->crtc_id);
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free(curr_enc);
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}
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disp->active_mode = select_mode(disp->num_modes, disp->modes, disp->old_crtc, str);
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if (!disp->active_mode) {
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fprintf(stderr, "Could not find mode '%s' for %s\n", str, disp->name);
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goto error;
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}
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fprintf(stderr, "Configuring %s with mode %ux%u@%u\n",
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disp->name, disp->active_mode->hdisplay, disp->active_mode->vdisplay,
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disp->active_mode->vrefresh);
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drmModeRes *res = drmModeGetResources(otd->fd);
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if (!res)
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goto error;
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bool success = false;
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for (int i = 0; !success && i < conn->count_encoders; ++i) {
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drmModeEncoder *enc = drmModeGetEncoder(otd->fd, conn->encoders[i]);
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if (!enc)
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continue;
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for (int j = 0; j < res->count_crtcs; ++j) {
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if ((enc->possible_crtcs & (1 << j)) == 0)
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continue;
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if ((otd->taken_crtcs & (1 << j)) == 0) {
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otd->taken_crtcs |= 1 << j;
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disp->crtc = res->crtcs[j];
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success = true;
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break;
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}
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}
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drmModeFreeEncoder(enc);
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}
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drmModeFreeResources(res);
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if (!success)
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goto error;
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disp->state = OTD_DISP_CONNECTED;
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drmModeFreeConnector(conn);
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disp->width = disp->active_mode->hdisplay;
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disp->height = disp->active_mode->vdisplay;
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init_display_renderer(otd, disp);
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return true;
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error:
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disp->state = OTD_DISP_DISCONNECTED;
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drmModeFreeConnector(conn);
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event_add(otd, disp, OTD_EV_DISPLAY_REM);
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return false;
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}
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void page_flip_handler(int fd,
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unsigned seq,
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unsigned tv_sec,
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unsigned tv_usec,
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void *user)
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{
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struct otd_display *disp = user;
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disp->pageflip_pending = true;
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if (!disp->cleanup)
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event_add(disp->otd, disp, OTD_EV_RENDER);
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}
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void destroy_display_renderer(struct otd *otd, struct otd_display *disp)
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{
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if (!otd || !disp || disp->state != OTD_DISP_CONNECTED)
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return;
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drmModeCrtc *crtc = disp->old_crtc;
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if (crtc) {
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drmEventContext event = {
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.version = DRM_EVENT_CONTEXT_VERSION,
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.page_flip_handler = page_flip_handler,
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};
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disp->cleanup = true;
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while (disp->pageflip_pending)
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drmHandleEvent(otd->fd, &event);
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drmModeSetCrtc(otd->fd, crtc->crtc_id, crtc->buffer_id,
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crtc->x, crtc->y, &disp->connector,
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1, &crtc->mode);
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drmModeFreeCrtc(crtc);
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}
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eglDestroySurface(otd->egl.disp, disp->egl);
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gbm_surface_destroy(disp->gbm);
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free(disp->modes);
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}
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|
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void get_drm_event(struct otd *otd)
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{
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drmEventContext event = {
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.version = DRM_EVENT_CONTEXT_VERSION,
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.page_flip_handler = page_flip_handler,
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};
|
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drmHandleEvent(otd->fd, &event);
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}
|
||||
|
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void rendering_begin(struct otd_display *disp)
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{
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struct otd *otd = disp->otd;
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eglMakeCurrent(otd->egl.disp, disp->egl, disp->egl, otd->egl.context);
|
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}
|
||||
|
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void rendering_end(struct otd_display *disp)
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{
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struct otd *otd = disp->otd;
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eglSwapBuffers(otd->egl.disp, disp->egl);
|
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|
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struct gbm_bo *bo = gbm_surface_lock_front_buffer(disp->gbm);
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uint32_t fb_id = get_fb_for_bo(otd->fd, bo);
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|
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drmModePageFlip(otd->fd, disp->crtc, fb_id, DRM_MODE_PAGE_FLIP_EVENT, disp);
|
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|
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gbm_surface_release_buffer(disp->gbm, bo);
|
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disp->pageflip_pending = false;
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}
|
||||
|
|
@ -0,0 +1,54 @@
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#ifndef DRM_H
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#define DRM_H
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|
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#include <stdbool.h>
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||||
#include <stdint.h>
|
||||
#include <xf86drmMode.h>
|
||||
#include <EGL/egl.h>
|
||||
#include <gbm.h>
|
||||
|
||||
enum otd_display_state {
|
||||
OTD_DISP_INVALID,
|
||||
OTD_DISP_DISCONNECTED,
|
||||
OTD_DISP_NEEDS_MODESET,
|
||||
OTD_DISP_CONNECTED,
|
||||
};
|
||||
|
||||
struct otd_display {
|
||||
struct otd *otd;
|
||||
|
||||
enum otd_display_state state;
|
||||
uint32_t connector;
|
||||
char name[16];
|
||||
|
||||
size_t num_modes;
|
||||
drmModeModeInfo *modes;
|
||||
drmModeModeInfo *active_mode;
|
||||
|
||||
uint32_t width;
|
||||
uint32_t height;
|
||||
|
||||
uint32_t crtc;
|
||||
drmModeCrtc *old_crtc;
|
||||
|
||||
struct gbm_surface *gbm;
|
||||
EGLSurface *egl;
|
||||
uint32_t fb_id;
|
||||
|
||||
bool pageflip_pending;
|
||||
bool cleanup;
|
||||
};
|
||||
|
||||
bool init_renderer(struct otd *otd);
|
||||
void destroy_renderer(struct otd *otd);
|
||||
|
||||
void scan_connectors(struct otd *otd);
|
||||
bool modeset_str(struct otd *otd, struct otd_display *disp, const char *str);
|
||||
void destroy_display_renderer(struct otd *otd, struct otd_display *disp);
|
||||
|
||||
void get_drm_event(struct otd *otd);
|
||||
|
||||
void rendering_begin(struct otd_display *disp);
|
||||
void rendering_end(struct otd_display *disp);
|
||||
|
||||
#endif
|
||||
|
|
@ -0,0 +1,91 @@
|
|||
#include "otd.h"
|
||||
#include "event.h"
|
||||
#include "drm.h"
|
||||
#include "udev.h"
|
||||
|
||||
#include <stdbool.h>
|
||||
#include <stdlib.h>
|
||||
#include <poll.h>
|
||||
|
||||
static inline void event_swap(struct otd_event *a, struct otd_event *b)
|
||||
{
|
||||
struct otd_event tmp = *a;
|
||||
*a = *b;
|
||||
*b = tmp;
|
||||
}
|
||||
|
||||
bool otd_get_event(struct otd *otd, struct otd_event *restrict ret)
|
||||
{
|
||||
struct pollfd fds[] = {
|
||||
{ .fd = otd->fd, .events = POLLIN },
|
||||
{ .fd = otd->udev_fd, .events = POLLIN },
|
||||
};
|
||||
|
||||
while (poll(fds, 2, 0) > 0) {
|
||||
if (fds[0].revents)
|
||||
get_drm_event(otd);
|
||||
if (fds[1].revents)
|
||||
otd_udev_event(otd);
|
||||
}
|
||||
|
||||
if (otd->event_len == 0) {
|
||||
ret->type = OTD_EV_NONE;
|
||||
ret->display = NULL;
|
||||
return false;
|
||||
}
|
||||
|
||||
struct otd_event *ev = otd->events;
|
||||
|
||||
// Downheap
|
||||
*ret = ev[0];
|
||||
ev[0] = ev[--otd->event_len];
|
||||
|
||||
size_t i = 0;
|
||||
while (i < otd->event_len / 2) {
|
||||
size_t left = i * 2 + 1;
|
||||
size_t right = i * 2 + 2;
|
||||
size_t max = (ev[left].type > ev[right].type) ? left : right;
|
||||
|
||||
if (ev[i].type <= ev[max].type) {
|
||||
event_swap(&ev[i], &ev[max]);
|
||||
i = max;
|
||||
} else {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
bool event_add(struct otd *otd, struct otd_display *disp, enum otd_event_type type)
|
||||
{
|
||||
if (type == OTD_EV_NONE)
|
||||
return true;
|
||||
|
||||
if (otd->event_len == otd->event_cap) {
|
||||
size_t new_size = (otd->event_cap == 0) ? 8 : otd->event_cap * 2;
|
||||
|
||||
struct otd_event *new = realloc(otd->events, sizeof *new * new_size);
|
||||
if (!new) {
|
||||
return false;
|
||||
}
|
||||
|
||||
otd->event_cap = new_size;
|
||||
otd->events = new;
|
||||
}
|
||||
|
||||
struct otd_event *ev = otd->events;
|
||||
|
||||
// Upheap
|
||||
size_t i = otd->event_len++;
|
||||
ev[i].type = type;
|
||||
ev[i].display = disp;
|
||||
|
||||
size_t j;
|
||||
while (i > 0 && ev[i].type > ev[(j = (i - 1) / 2)].type) {
|
||||
event_swap(&ev[i], &ev[j]);
|
||||
i = j;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
|
@ -0,0 +1,21 @@
|
|||
#ifndef EVENT_H
|
||||
#define EVENT_H
|
||||
|
||||
#include <stdbool.h>
|
||||
|
||||
enum otd_event_type {
|
||||
OTD_EV_NONE,
|
||||
OTD_EV_RENDER,
|
||||
OTD_EV_DISPLAY_REM,
|
||||
OTD_EV_DISPLAY_ADD,
|
||||
};
|
||||
|
||||
struct otd_event {
|
||||
enum otd_event_type type;
|
||||
struct otd_display *display;
|
||||
};
|
||||
|
||||
bool otd_get_event(struct otd *otd, struct otd_event *restrict ret);
|
||||
bool event_add(struct otd *otd, struct otd_display *disp, enum otd_event_type type);
|
||||
|
||||
#endif
|
||||
|
|
@ -0,0 +1,160 @@
|
|||
#include <stdio.h>
|
||||
#include <stdbool.h>
|
||||
#include <inttypes.h>
|
||||
#include <time.h>
|
||||
#include <GLES3/gl3.h>
|
||||
#include <unistd.h>
|
||||
#include <string.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdnoreturn.h>
|
||||
|
||||
#include "otd.h"
|
||||
#include "drm.h"
|
||||
#include "event.h"
|
||||
|
||||
// I know this is pretty crappy,
|
||||
// but it's just for the example's sake
|
||||
struct {
|
||||
char *name;
|
||||
char *mode;
|
||||
} displays[8];
|
||||
int num_displays = 0;
|
||||
|
||||
noreturn void usage(const char *name, int ret)
|
||||
{
|
||||
fprintf(stderr, "usage: %s [-o <name> [-m <mode>]]*\n"
|
||||
"\n"
|
||||
" -h \tDisplay this help text\n"
|
||||
" -o <name>\tWhich diplay to use. e.g. DVI-I-1.\n"
|
||||
" -m <mode>\tWhich mode to use. It must come after an -o option.\n"
|
||||
" \tMust be either 'preferred', 'current', widthxheight\n"
|
||||
" \tor widthxheight@rate. Defaults to 'preferred'.\n"
|
||||
"\n"
|
||||
"example: %s -o DVI-I-1 -m 1920x1080@60 -o DP-1 -m 1920x1200\n",
|
||||
name, name);
|
||||
|
||||
exit(ret);
|
||||
}
|
||||
|
||||
void parse_args(int argc, char *argv[])
|
||||
{
|
||||
int c;
|
||||
int i = -1;
|
||||
|
||||
while ((c = getopt(argc, argv, "ho:m:")) != -1) {
|
||||
switch (c) {
|
||||
case 'h':
|
||||
usage(argv[0], 0);
|
||||
case 'o':
|
||||
i = num_displays++;
|
||||
|
||||
if (num_displays == 8) {
|
||||
fprintf(stderr, "Too many displays\n");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
displays[i].name = strdup(optarg);
|
||||
break;
|
||||
case 'm':
|
||||
if (i == -1) {
|
||||
fprintf(stderr, "A display is required first\n");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
fprintf(stderr, "Assigned '%s' to '%s'\n", optarg, displays[i].name);
|
||||
displays[i].mode = optarg;
|
||||
i = -1;
|
||||
break;
|
||||
default:
|
||||
usage(argv[0], 1);
|
||||
}
|
||||
}
|
||||
|
||||
// Trailing args
|
||||
if (optind != argc) {
|
||||
usage(argv[0], 1);
|
||||
}
|
||||
}
|
||||
|
||||
int main(int argc, char *argv[])
|
||||
{
|
||||
parse_args(argc, argv);
|
||||
|
||||
struct otd *otd = otd_start();
|
||||
if (!otd)
|
||||
return 1;
|
||||
|
||||
float colour[3] = {1.0, 0.0, 0.0};
|
||||
int dec = 0;
|
||||
|
||||
struct timespec start, now;
|
||||
clock_gettime(CLOCK_MONOTONIC, &start);
|
||||
struct timespec last = start;
|
||||
|
||||
while (clock_gettime(CLOCK_MONOTONIC, &now) == 0 &&
|
||||
now.tv_sec < start.tv_sec + 10) {
|
||||
|
||||
struct otd_event ev;
|
||||
if (!otd_get_event(otd, &ev))
|
||||
continue;
|
||||
|
||||
struct otd_display *disp = ev.display;
|
||||
|
||||
switch (ev.type) {
|
||||
case OTD_EV_RENDER:
|
||||
rendering_begin(disp);
|
||||
|
||||
// This is all just calculating the colours.
|
||||
// It's not particularly important.
|
||||
|
||||
long ms = (now.tv_sec - last.tv_sec) * 1000 +
|
||||
(now.tv_nsec - last.tv_nsec) / 1000000;
|
||||
|
||||
int inc = (dec + 1) % 3;
|
||||
|
||||
colour[dec] -= ms / 2000.0f;
|
||||
colour[inc] += ms / 2000.0f;
|
||||
|
||||
if (colour[dec] < 0.0f) {
|
||||
colour[dec] = 0.0f;
|
||||
colour[inc] = 1.0f;
|
||||
|
||||
dec = (dec + 1) % 3;
|
||||
}
|
||||
|
||||
last = now;
|
||||
|
||||
glViewport(0, 0, disp->width, disp->height);
|
||||
glClearColor(colour[0], colour[1], colour[2], 1.0f);
|
||||
glClear(GL_COLOR_BUFFER_BIT);
|
||||
|
||||
rendering_end(disp);
|
||||
break;
|
||||
case OTD_EV_DISPLAY_REM:
|
||||
printf("%s removed\n", disp->name);
|
||||
break;
|
||||
case OTD_EV_DISPLAY_ADD:
|
||||
printf("%s added\n", disp->name);
|
||||
|
||||
const char *mode = NULL;
|
||||
for (int i = 0; i < num_displays; ++i) {
|
||||
if (strcmp(disp->name, displays[i].name) == 0) {
|
||||
mode = displays[i].mode;
|
||||
}
|
||||
}
|
||||
if (!mode)
|
||||
mode = "preferred";
|
||||
|
||||
if (!modeset_str(otd, ev.display, mode)) {
|
||||
fprintf(stderr, "Modesetting %s failed\n", disp->name);
|
||||
goto out;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
out:
|
||||
otd_finish(otd);
|
||||
}
|
||||
|
|
@ -0,0 +1,71 @@
|
|||
#include <unistd.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdio.h>
|
||||
|
||||
#include "otd.h"
|
||||
#include "drm.h"
|
||||
#include "event.h"
|
||||
#include "session.h"
|
||||
#include "udev.h"
|
||||
|
||||
struct otd *otd_start(void)
|
||||
{
|
||||
struct otd *otd = calloc(1, sizeof *otd);
|
||||
if (!otd)
|
||||
return NULL;
|
||||
|
||||
if (!otd_new_session(otd)) {
|
||||
fprintf(stderr, "Could not create session\n");
|
||||
goto error;
|
||||
}
|
||||
|
||||
if (!otd_udev_start(otd)) {
|
||||
fprintf(stderr, "Could not start udev\n");
|
||||
goto error_session;
|
||||
}
|
||||
|
||||
otd_udev_find_gpu(otd);
|
||||
if (otd->fd == -1) {
|
||||
fprintf(stderr, "Could not open GPU\n");
|
||||
goto error_udev;
|
||||
}
|
||||
|
||||
if (!init_renderer(otd)) {
|
||||
fprintf(stderr, "Could not initalise renderer\n");
|
||||
goto error_fd;
|
||||
}
|
||||
|
||||
scan_connectors(otd);
|
||||
|
||||
return otd;
|
||||
|
||||
error_fd:
|
||||
release_device(otd, otd->fd);
|
||||
error_udev:
|
||||
otd_udev_finish(otd);
|
||||
error_session:
|
||||
otd_close_session(otd);
|
||||
error:
|
||||
free(otd);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
void otd_finish(struct otd *otd)
|
||||
{
|
||||
if (!otd)
|
||||
return;
|
||||
|
||||
for (size_t i = 0; i < otd->display_len; ++i) {
|
||||
destroy_display_renderer(otd, &otd->displays[i]);
|
||||
}
|
||||
|
||||
destroy_renderer(otd);
|
||||
otd_close_session(otd);
|
||||
otd_udev_finish(otd);
|
||||
|
||||
close(otd->fd);
|
||||
free(otd->events);
|
||||
free(otd->displays);
|
||||
free(otd);
|
||||
}
|
||||
|
||||
|
|
@ -0,0 +1,44 @@
|
|||
#ifndef LIBOTD_H
|
||||
#define LIBOTD_H
|
||||
|
||||
#include <stdbool.h>
|
||||
#include <stddef.h>
|
||||
#include <EGL/egl.h>
|
||||
#include <gbm.h>
|
||||
#include <libudev.h>
|
||||
|
||||
#include "session.h"
|
||||
|
||||
struct otd {
|
||||
int fd;
|
||||
bool paused;
|
||||
|
||||
// Priority Queue (Max-heap)
|
||||
size_t event_cap;
|
||||
size_t event_len;
|
||||
struct otd_event *events;
|
||||
|
||||
size_t display_len;
|
||||
struct otd_display *displays;
|
||||
|
||||
uint32_t taken_crtcs;
|
||||
|
||||
struct gbm_device *gbm;
|
||||
struct {
|
||||
EGLDisplay disp;
|
||||
EGLConfig conf;
|
||||
EGLContext context;
|
||||
} egl;
|
||||
|
||||
struct otd_session session;
|
||||
|
||||
struct udev *udev;
|
||||
struct udev_monitor *mon;
|
||||
int udev_fd;
|
||||
char *drm_path;
|
||||
};
|
||||
|
||||
struct otd *otd_start(void);
|
||||
void otd_finish(struct otd *otd);
|
||||
|
||||
#endif
|
||||
|
|
@ -0,0 +1,224 @@
|
|||
#include <stdio.h>
|
||||
#include <stdbool.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <systemd/sd-bus.h>
|
||||
#include <systemd/sd-login.h>
|
||||
#include <unistd.h>
|
||||
#include <sys/sysmacros.h>
|
||||
#include <sys/stat.h>
|
||||
#include <fcntl.h>
|
||||
|
||||
#include "session.h"
|
||||
#include "otd.h"
|
||||
|
||||
int take_device(struct otd *restrict otd,
|
||||
const char *restrict path,
|
||||
bool *restrict paused_out)
|
||||
{
|
||||
int ret;
|
||||
int fd = -1;
|
||||
sd_bus_message *msg = NULL;
|
||||
sd_bus_error error = SD_BUS_ERROR_NULL;
|
||||
struct otd_session *s = &otd->session;
|
||||
|
||||
struct stat st;
|
||||
if (stat(path, &st) < 0) {
|
||||
fprintf(stderr, "Failed to stat '%s'\n", path);
|
||||
return -1;
|
||||
}
|
||||
|
||||
ret = sd_bus_call_method(s->bus,
|
||||
"org.freedesktop.login1",
|
||||
s->path,
|
||||
"org.freedesktop.login1.Session",
|
||||
"TakeDevice",
|
||||
&error, &msg,
|
||||
"uu", major(st.st_rdev), minor(st.st_rdev));
|
||||
if (ret < 0) {
|
||||
fprintf(stderr, "%s\n", error.message);
|
||||
goto error;
|
||||
}
|
||||
|
||||
int paused = 0;
|
||||
ret = sd_bus_message_read(msg, "hb", &fd, &paused);
|
||||
if (ret < 0) {
|
||||
fprintf(stderr, "%s\n", strerror(-ret));
|
||||
goto error;
|
||||
}
|
||||
|
||||
// The original fd seem to be closed when the message is freed
|
||||
// so we just clone it.
|
||||
fd = fcntl(fd, F_DUPFD_CLOEXEC, 0);
|
||||
|
||||
if (paused_out)
|
||||
*paused_out = paused;
|
||||
|
||||
error:
|
||||
sd_bus_error_free(&error);
|
||||
sd_bus_message_unref(msg);
|
||||
return fd;
|
||||
}
|
||||
|
||||
void release_device(struct otd *otd, int fd)
|
||||
{
|
||||
int ret;
|
||||
sd_bus_message *msg = NULL;
|
||||
sd_bus_error error = SD_BUS_ERROR_NULL;
|
||||
struct otd_session *s = &otd->session;
|
||||
|
||||
struct stat st;
|
||||
if (fstat(fd, &st) < 0) {
|
||||
fprintf(stderr, "Could not stat fd %d\n", fd);
|
||||
return;
|
||||
}
|
||||
|
||||
ret = sd_bus_call_method(s->bus,
|
||||
"org.freedesktop.login1",
|
||||
s->path,
|
||||
"org.freedesktop.login1.Session",
|
||||
"ReleaseDevice",
|
||||
&error, &msg,
|
||||
"uu", major(st.st_rdev), minor(st.st_rdev));
|
||||
if (ret < 0) {
|
||||
/* Log something */;
|
||||
}
|
||||
|
||||
sd_bus_error_free(&error);
|
||||
sd_bus_message_unref(msg);
|
||||
}
|
||||
|
||||
static bool session_activate(struct otd *otd)
|
||||
{
|
||||
int ret;
|
||||
sd_bus_message *msg = NULL;
|
||||
sd_bus_error error = SD_BUS_ERROR_NULL;
|
||||
struct otd_session *s = &otd->session;
|
||||
|
||||
ret = sd_bus_call_method(s->bus,
|
||||
"org.freedesktop.login1",
|
||||
s->path,
|
||||
"org.freedesktop.login1.Session",
|
||||
"Activate",
|
||||
&error, &msg,
|
||||
"");
|
||||
if (ret < 0) {
|
||||
fprintf(stderr, "%s\n", error.message);
|
||||
}
|
||||
|
||||
sd_bus_error_free(&error);
|
||||
sd_bus_message_unref(msg);
|
||||
return ret >= 0;
|
||||
}
|
||||
|
||||
static bool take_control(struct otd *otd)
|
||||
{
|
||||
int ret;
|
||||
sd_bus_message *msg = NULL;
|
||||
sd_bus_error error = SD_BUS_ERROR_NULL;
|
||||
struct otd_session *s = &otd->session;
|
||||
|
||||
ret = sd_bus_call_method(s->bus,
|
||||
"org.freedesktop.login1",
|
||||
s->path,
|
||||
"org.freedesktop.login1.Session",
|
||||
"TakeControl",
|
||||
&error, &msg,
|
||||
"b", false);
|
||||
if (ret < 0) {
|
||||
/* Log something */;
|
||||
}
|
||||
|
||||
sd_bus_error_free(&error);
|
||||
sd_bus_message_unref(msg);
|
||||
return ret >= 0;
|
||||
}
|
||||
|
||||
static void release_control(struct otd *otd)
|
||||
{
|
||||
int ret;
|
||||
sd_bus_message *msg = NULL;
|
||||
sd_bus_error error = SD_BUS_ERROR_NULL;
|
||||
struct otd_session *s = &otd->session;
|
||||
|
||||
ret = sd_bus_call_method(s->bus,
|
||||
"org.freedesktop.login1",
|
||||
s->path,
|
||||
"org.freedesktop.login1.Session",
|
||||
"ReleaseControl",
|
||||
&error, &msg,
|
||||
"");
|
||||
if (ret < 0) {
|
||||
/* Log something */;
|
||||
}
|
||||
|
||||
sd_bus_error_free(&error);
|
||||
sd_bus_message_unref(msg);
|
||||
}
|
||||
|
||||
void otd_close_session(struct otd *otd)
|
||||
{
|
||||
release_device(otd, otd->fd);
|
||||
release_control(otd);
|
||||
|
||||
sd_bus_unref(otd->session.bus);
|
||||
free(otd->session.id);
|
||||
free(otd->session.path);
|
||||
free(otd->session.seat);
|
||||
}
|
||||
|
||||
bool otd_new_session(struct otd *otd)
|
||||
{
|
||||
int ret;
|
||||
struct otd_session *s = &otd->session;
|
||||
|
||||
ret = sd_pid_get_session(getpid(), &s->id);
|
||||
if (ret < 0) {
|
||||
fprintf(stderr, "Could not get session\n");
|
||||
goto error;
|
||||
}
|
||||
|
||||
ret = sd_session_get_seat(s->id, &s->seat);
|
||||
if (ret < 0) {
|
||||
fprintf(stderr, "Could not get seat\n");
|
||||
goto error;
|
||||
}
|
||||
|
||||
// This could be done using asprintf, but I don't want to define _GNU_SOURCE
|
||||
|
||||
const char *fmt = "/org/freedesktop/login1/session/%s";
|
||||
int len = snprintf(NULL, 0, fmt, s->id);
|
||||
|
||||
s->path = malloc(len + 1);
|
||||
if (!s->path)
|
||||
goto error;
|
||||
|
||||
sprintf(s->path, fmt, s->id);
|
||||
|
||||
ret = sd_bus_open_system(&s->bus);
|
||||
if (ret < 0) {
|
||||
fprintf(stderr, "Could not open bus\n");
|
||||
goto error;
|
||||
}
|
||||
|
||||
if (!session_activate(otd)) {
|
||||
fprintf(stderr, "Could not activate session\n");
|
||||
goto error_bus;
|
||||
}
|
||||
|
||||
if (!take_control(otd)) {
|
||||
fprintf(stderr, "Could not take control of session\n");
|
||||
goto error_bus;
|
||||
}
|
||||
|
||||
return true;
|
||||
|
||||
error_bus:
|
||||
sd_bus_unref(s->bus);
|
||||
|
||||
error:
|
||||
free(s->path);
|
||||
free(s->id);
|
||||
free(s->seat);
|
||||
return false;
|
||||
}
|
||||
|
|
@ -0,0 +1,25 @@
|
|||
#ifndef SESSION_H
|
||||
#define SESSION_H
|
||||
|
||||
#include <systemd/sd-bus.h>
|
||||
#include <stdbool.h>
|
||||
|
||||
struct otd_session {
|
||||
char *id;
|
||||
char *path;
|
||||
char *seat;
|
||||
|
||||
sd_bus *bus;
|
||||
};
|
||||
|
||||
struct otd;
|
||||
bool otd_new_session(struct otd *otd);
|
||||
void otd_close_session(struct otd *otd);
|
||||
|
||||
int take_device(struct otd *restrict otd,
|
||||
const char *restrict path,
|
||||
bool *restrict paused_out);
|
||||
|
||||
void release_device(struct otd *otd, int fd);
|
||||
|
||||
#endif
|
||||
|
|
@ -0,0 +1,158 @@
|
|||
#include <libudev.h>
|
||||
#include <stdbool.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <stdint.h>
|
||||
#include <xf86drm.h>
|
||||
#include <xf86drmMode.h>
|
||||
|
||||
#include "otd.h"
|
||||
#include "udev.h"
|
||||
#include "session.h"
|
||||
#include "drm.h"
|
||||
|
||||
static bool device_is_kms(struct otd *otd, struct udev_device *dev)
|
||||
{
|
||||
const char *path = udev_device_get_devnode(dev);
|
||||
int fd;
|
||||
|
||||
if (!path)
|
||||
return false;
|
||||
|
||||
fd = take_device(otd, path, &otd->paused);
|
||||
if (fd < 0)
|
||||
return false;
|
||||
|
||||
drmModeRes *res = drmModeGetResources(fd);
|
||||
if (!res)
|
||||
goto out_fd;
|
||||
|
||||
if (res->count_crtcs <= 0 || res->count_connectors <= 0 ||
|
||||
res->count_encoders <= 0)
|
||||
goto out_res;
|
||||
|
||||
if (otd->fd >= 0) {
|
||||
release_device(otd, otd->fd);
|
||||
free(otd->drm_path);
|
||||
}
|
||||
|
||||
otd->fd = fd;
|
||||
otd->drm_path = strdup(path);
|
||||
|
||||
drmModeFreeResources(res);
|
||||
return true;
|
||||
|
||||
out_res:
|
||||
drmModeFreeResources(res);
|
||||
out_fd:
|
||||
release_device(otd, fd);
|
||||
return false;
|
||||
}
|
||||
|
||||
void otd_udev_find_gpu(struct otd *otd)
|
||||
{
|
||||
struct udev *udev = otd->udev;
|
||||
otd->fd = -1;
|
||||
|
||||
struct udev_enumerate *en = udev_enumerate_new(udev);
|
||||
if (!en)
|
||||
return;
|
||||
|
||||
udev_enumerate_add_match_subsystem(en, "drm");
|
||||
udev_enumerate_add_match_sysname(en, "card[0-9]*");
|
||||
|
||||
udev_enumerate_scan_devices(en);
|
||||
struct udev_list_entry *entry;
|
||||
udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(en)) {
|
||||
bool is_boot_vga = false;
|
||||
|
||||
const char *path = udev_list_entry_get_name(entry);
|
||||
struct udev_device *dev = udev_device_new_from_syspath(udev, path);
|
||||
if (!dev)
|
||||
continue;
|
||||
|
||||
const char *seat = udev_device_get_property_value(dev, "ID_SEAT");
|
||||
if (!seat)
|
||||
seat = "seat0";
|
||||
if (strcmp(otd->session.seat, seat) != 0) {
|
||||
udev_device_unref(dev);
|
||||
continue;
|
||||
}
|
||||
|
||||
struct udev_device *pci =
|
||||
udev_device_get_parent_with_subsystem_devtype(dev,
|
||||
"pci", NULL);
|
||||
|
||||
if (pci) {
|
||||
const char *id = udev_device_get_sysattr_value(pci, "boot_vga");
|
||||
if (id && strcmp(id, "1") == 0)
|
||||
is_boot_vga = true;
|
||||
udev_device_unref(pci);
|
||||
}
|
||||
|
||||
if (!is_boot_vga && otd->fd >= 0) {
|
||||
udev_device_unref(dev);
|
||||
continue;
|
||||
}
|
||||
|
||||
if (!device_is_kms(otd, dev)) {
|
||||
udev_device_unref(dev);
|
||||
continue;
|
||||
}
|
||||
|
||||
if (is_boot_vga) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
udev_enumerate_unref(en);
|
||||
}
|
||||
|
||||
bool otd_udev_start(struct otd *otd)
|
||||
{
|
||||
otd->udev = udev_new();
|
||||
if (!otd->udev)
|
||||
return false;
|
||||
|
||||
otd->mon = udev_monitor_new_from_netlink(otd->udev, "udev");
|
||||
if (!otd->mon) {
|
||||
udev_unref(otd->udev);
|
||||
return false;
|
||||
}
|
||||
|
||||
udev_monitor_filter_add_match_subsystem_devtype(otd->mon, "drm", NULL);
|
||||
udev_monitor_enable_receiving(otd->mon);
|
||||
|
||||
otd->udev_fd = udev_monitor_get_fd(otd->mon);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
void otd_udev_finish(struct otd *otd)
|
||||
{
|
||||
if (!otd)
|
||||
return;
|
||||
|
||||
udev_monitor_unref(otd->mon);
|
||||
udev_unref(otd->udev);
|
||||
}
|
||||
|
||||
void otd_udev_event(struct otd *otd)
|
||||
{
|
||||
struct udev_device *dev = udev_monitor_receive_device(otd->mon);
|
||||
if (!dev)
|
||||
return;
|
||||
|
||||
const char *path = udev_device_get_devnode(dev);
|
||||
if (!path || strcmp(path, otd->drm_path) != 0)
|
||||
goto out;
|
||||
|
||||
const char *action = udev_device_get_action(dev);
|
||||
if (!action || strcmp(action, "change") != 0)
|
||||
goto out;
|
||||
|
||||
scan_connectors(otd);
|
||||
|
||||
out:
|
||||
udev_device_unref(dev);
|
||||
}
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
#ifndef UDEV_H
|
||||
#define UDEV_H
|
||||
|
||||
bool otd_udev_start(struct otd *otd);
|
||||
void otd_udev_finish(struct otd *otd);
|
||||
void otd_udev_find_gpu(struct otd *otd);
|
||||
void otd_udev_event(struct otd *otd);
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue