Fixed broken files/code and other errors

1 files changed, 82 insertions, 0 deletions

diff --git a/src/backend/driver.c b/src/backend/driver.c
new file mode 100644
index 0000000..a41d2fd
--- /dev/null
+++ b/src/backend/driver.c
@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: MPL-2.0
+// Copyright (c) Yuxuan Shui <[email protected]>
+#include <stdlib.h>
+#include <string.h>
+
+#include <xcb/randr.h>
+#include <xcb/xcb.h>
+
+#include "backend/backend.h"
+#include "backend/driver.h"
+#include "common.h"
+#include "compiler.h"
+#include "log.h"
+
+/// Apply driver specified global workarounds. It's safe to call this multiple times.
+void apply_driver_workarounds(struct session *ps, enum driver driver) {
+	if (driver & DRIVER_NVIDIA) {
+		// setenv("__GL_YIELD", "usleep", true);
+		setenv("__GL_MaxFramesAllowed", "1", true);
+		ps->o.xrender_sync_fence = true;
+	}
+}
+
+enum driver detect_driver(xcb_connection_t *c, backend_t *backend_data, xcb_window_t window) {
+	enum driver ret = 0;
+	// First we try doing backend agnostic detection using RANDR
+	// There's no way to query the X server about what driver is loaded, so RANDR is
+	// our best shot.
+	auto randr_version = xcb_randr_query_version_reply(
+	    c, xcb_randr_query_version(c, XCB_RANDR_MAJOR_VERSION, XCB_RANDR_MINOR_VERSION),
+	    NULL);
+	if (randr_version &&
+	    (randr_version->major_version > 1 || randr_version->minor_version >= 4)) {
+		auto r = xcb_randr_get_providers_reply(
+		    c, xcb_randr_get_providers(c, window), NULL);
+		if (r == NULL) {
+			log_warn("Failed to get RANDR providers");
+			free(randr_version);
+			return 0;
+		}
+
+		auto providers = xcb_randr_get_providers_providers(r);
+		for (auto i = 0; i < xcb_randr_get_providers_providers_length(r); i++) {
+			auto r2 = xcb_randr_get_provider_info_reply(
+			    c, xcb_randr_get_provider_info(c, providers[i], r->timestamp), NULL);
+			if (r2 == NULL) {
+				continue;
+			}
+			if (r2->num_outputs == 0) {
+				free(r2);
+				continue;
+			}
+
+			auto name_len = xcb_randr_get_provider_info_name_length(r2);
+			assert(name_len >= 0);
+			auto name =
+			    strndup(xcb_randr_get_provider_info_name(r2), (size_t)name_len);
+			if (strcasestr(name, "modesetting") != NULL) {
+				ret |= DRIVER_MODESETTING;
+			} else if (strcasestr(name, "Radeon") != NULL) {
+				// Be conservative, add both radeon drivers
+				ret |= DRIVER_AMDGPU | DRIVER_RADEON;
+			} else if (strcasestr(name, "NVIDIA") != NULL) {
+				ret |= DRIVER_NVIDIA;
+			} else if (strcasestr(name, "nouveau") != NULL) {
+				ret |= DRIVER_NOUVEAU;
+			} else if (strcasestr(name, "Intel") != NULL) {
+				ret |= DRIVER_INTEL;
+			}
+			free(name);
+			free(r2);
+		}
+		free(r);
+	}
+	free(randr_version);
+
+	// If the backend supports driver detection, use that as well
+	if (backend_data && backend_data->ops->detect_driver) {
+		ret |= backend_data->ops->detect_driver(backend_data);
+	}
+	return ret;
+}