mirror of
https://github.com/hyprwm/wlroots-hyprland.git
synced 2024-11-02 11:55:59 +01:00
466 lines
11 KiB
C
466 lines
11 KiB
C
#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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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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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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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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disp->pageflip_pending = false;
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}
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