add bar class

meson.build

@@ -11,6 +11,7 @@ subdir('protocols')
 executable('somebar',
   'src/main.cpp',
   'src/shm_buffer.cpp',
+  'src/bar.cpp',
   wayland_sources,
   #moc,
   dependencies: [qt5_dep, wayland_dep])

src/bar.cpp

@@ -0,0 +1,44 @@
+// somebar - dwl bar
+// See LICENSE file for copyright and license details.
+
+#include <cstdio>
+#include <cstring>
+#include "bar.hpp"
+#include "config.hpp"
+
+const zwlr_layer_surface_v1_listener Bar::_layerSurfaceListener = {
+    [](void *owner, zwlr_layer_surface_v1*, uint32_t serial, uint32_t width, uint32_t height)
+    {
+        static_cast<Bar*>(owner)->layerSurfaceConfigure(serial, width, height);
+    }
+};
+
+Bar::Bar(const wl_output *output)
+{
+    _surface = wl_compositor_create_surface(compositor);
+    _layerSurface = zwlr_layer_shell_v1_get_layer_surface(wlrLayerShell, _surface, nullptr, ZWLR_LAYER_SHELL_V1_LAYER_TOP, "net.tapesoftware.Somebar");
+    zwlr_layer_surface_v1_add_listener(_layerSurface, &_layerSurfaceListener, this);
+    zwlr_layer_surface_v1_set_anchor(_layerSurface, ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP | ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT | ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT);
+    zwlr_layer_surface_v1_set_size(_layerSurface, 0, barSize);
+    zwlr_layer_surface_v1_set_exclusive_zone(_layerSurface, barSize);
+    wl_surface_commit(_surface);
+}
+
+Bar::~Bar()
+{
+    wl_surface_destroy(_surface);
+    zwlr_layer_surface_v1_destroy(_layerSurface);
+    waylandFlush();
+}
+
+void Bar::layerSurfaceConfigure(uint32_t serial, uint32_t width, uint32_t height)
+{
+    zwlr_layer_surface_v1_ack_configure(_layerSurface, serial);
+    printf("configure: %d x %d\n", width, height);
+
+    _bufs.emplace(width, height, WL_SHM_FORMAT_XRGB8888);
+    memset(_bufs->data(), 0xff, _bufs->stride*_bufs->height);
+    wl_surface_attach(_surface, _bufs->buffer(), 0, 0);
+    wl_surface_commit(_surface);
+    waylandFlush();
+}

src/bar.hpp

@@ -2,15 +2,21 @@
 // See LICENSE file for copyright and license details.
 
 #pragma once
+#include <optional>
 #include <wayland-client.h>
 #include "wlr-layer-shell-unstable-v1-client-protocol.h"
 #include "common.hpp"
 #include "shm_buffer.hpp"
 
 class Bar {
+    static const zwlr_layer_surface_v1_listener _layerSurfaceListener;
+
     wl_surface *_surface {nullptr};
     zwlr_layer_surface_v1 *_layerSurface {nullptr};
-    ShmBuffer _bufs;
+    std::optional<ShmBuffer> _bufs;
+
+    void layerSurfaceConfigure(uint32_t serial, uint32_t width, uint32_t height);
 public:
-    explicit Bar(wl_output *output);
+    explicit Bar(const wl_output *output);
+    ~Bar();
 };

src/config.hpp

@@ -0,0 +1,4 @@
+// somebar - dwl bar
+// See LICENSE file for copyright and license details.
+
+constexpr int barSize = 20;

src/main.cpp

@@ -12,9 +12,7 @@
 #include "wlr-layer-shell-unstable-v1-client-protocol.h"
 #include "xdg-shell-client-protocol.h"
 #include "common.hpp"
-#include "shm_buffer.hpp"
-
-constexpr uint32_t barSize = 20;
+#include "bar.hpp"
 
 static void waylandWriteReady();
 static void requireGlobal(const void *p, const char *name);
@@ -33,51 +31,13 @@ static const struct xdg_wm_base_listener xdgWmBaseListener = {
     }
 };
 
-// app globals
-static wl_surface *surface;
-static zwlr_layer_surface_v1 *layerSurface;
-static const struct wl_surface_listener surfaceListener = {
-    // todo
-};
-static ShmBuffer *xbuf;
-static const struct zwlr_layer_surface_v1_listener layerSurfaceListener = {
-    [](void*, zwlr_layer_surface_v1 *layerSurface, uint32_t serial, uint32_t width, uint32_t height) {
-        zwlr_layer_surface_v1_ack_configure(layerSurface, serial);
-        printf("configured to %d x %d\n", width, height);
-        xbuf = new ShmBuffer(width, height, WL_SHM_FORMAT_XRGB8888);
-        auto buffer = xbuf->data();
-
-        auto w = 2*M_PI/(width / 10);
-        for (auto x = 0; x < width; x++) {
-            auto val = 255*(sin(x*w)/2+0.5);
-            for (auto y = 0; y < height; y++) {
-                auto p = &buffer[y*xbuf->stride+x*4];
-                *p++ = 0;
-                *p++ = 0;
-                *p++ = val;
-                *p++ = val;
-            }
-        }
-
-        wl_surface_attach(surface, xbuf->buffer(), 0, 0);
-        wl_surface_commit(surface);
-        waylandFlush();
-    }
-};
-
 // called after we have received the initial batch of globals
 static void onReady()
 {
     requireGlobal(compositor, "wl_compositor");
     requireGlobal(shm, "wl_shm");
     requireGlobal(wlrLayerShell, "zwlr_layer_shell_v1");
-    surface = wl_compositor_create_surface(compositor);
-    layerSurface = zwlr_layer_shell_v1_get_layer_surface(wlrLayerShell, surface, nullptr, ZWLR_LAYER_SHELL_V1_LAYER_TOP, "net.tapesoftware.Somebar");
-    zwlr_layer_surface_v1_add_listener(layerSurface, &layerSurfaceListener, nullptr);
-    zwlr_layer_surface_v1_set_anchor(layerSurface, ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP | ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT | ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT);
-    zwlr_layer_surface_v1_set_size(layerSurface, 0, barSize);
-    zwlr_layer_surface_v1_set_exclusive_zone(layerSurface, barSize);
-    wl_surface_commit(surface);
+    std::ignore = new Bar(nullptr);
     waylandFlush();
 }