Own Linux platform services and narrow legacy fallback

linux/CMakeLists.txt

@@ -43,6 +43,7 @@ add_executable(panopainter
 	../src/app_layout.cpp
 	../src/app_shaders.cpp
     ../src/app_vr.cpp
+	../src/platform_linux/linux_platform_services.cpp
 	../src/brush.cpp
 	../src/canvas.cpp
 	../src/canvas_layer.cpp

linux/src/main.cpp

@@ -3,42 +3,11 @@
 #include <glad/glad.h>
 #include <GLFW/glfw3.h>
 #include <app.h>
-#include <platform_legacy/legacy_platform_state.h>
-#include <platform_legacy/legacy_platform_services.h>
-#include <libgen.h>
-#include <pwd.h>
-#include <unistd.h>
+#include <platform_linux/linux_platform_services.h>
 
 static App app;
 glm::vec2 g_cursor_pos;
 
-int mkpath(const std::string& dir, mode_t mode = DEFFILEMODE)
-{
-    struct stat sb;
-
-    if (dir.empty()) {
-        errno = EINVAL;
-        return 1;
-    }
-
-    if (!stat(dir.c_str(), &sb))
-        return 0;
-
-    mkpath(dirname(strdupa(dir.c_str())), mode);
-
-    int ret = mkdir(dir.c_str(), mode);
-    chmod(dir.c_str(), S_IRWXU);
-    if (ret != 0)
-        LOG("mkdir failed with error %d on %s", errno, dir.c_str());
-    return ret;
-}
-
-std::string linux_home_path()
-{
-    struct passwd *pw = getpwuid(getuid());
-    return pw->pw_dir;
-}
-
 void error_log(int code, const char * s)
 {
     printf("glfw error: %s", s);
@@ -67,12 +36,10 @@ int main(int argc, char** args)
     pp::platform::linux_desktop::set_fps_title_callback([wnd](std::string title) {
         glfwSetWindowTitle(wnd, title.c_str());
     });
-    auto platform_services = pp::platform::legacy::create_platform_services({
-        .glfw_shell = {
-            .acquire_render_context = [wnd] { glfwMakeContextCurrent(wnd); },
-            .present_render_context = [wnd] { glfwSwapBuffers(wnd); },
-            .request_app_close = [wnd] { glfwSetWindowShouldClose(wnd, GLFW_TRUE); },
-        },
+    auto platform_services = pp::platform::linux_desktop::create_platform_services({
+        .acquire_render_context = [wnd] { glfwMakeContextCurrent(wnd); },
+        .present_render_context = [wnd] { glfwSwapBuffers(wnd); },
+        .request_app_close = [wnd] { glfwSetWindowShouldClose(wnd, GLFW_TRUE); },
     });
 
     glfwSetCursorPosCallback(wnd, [](GLFWwindow* wnd, double x, double y){