From d0e18bdb7924c71cdca8dd983711171d87ef28be Mon Sep 17 00:00:00 2001
From: Benjamin Barenblat <bbarenblat@gmail.com>
Date: Mon, 17 Jan 2022 23:12:32 -0500
Subject: glplanet, an OpenGL-based planetary renderer
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glplanet draws Earth like it currently appears from space, putting
nighttime areas in shadow and daytime areas in light. It’s modeled
after Xplanet (http://xplanet.sourceforge.net/), but whereas Xplanet is
entirely a CPU-resident program, glplanet draws using OpenGL. It’s thus
much less resource-intensive, particularly when using high-resolution
textures.
---
 src/x/screen.h | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 src/x/screen.h

(limited to 'src/x/screen.h')

diff --git a/src/x/screen.h b/src/x/screen.h
new file mode 100644
index 0000000..88acae5
--- /dev/null
+++ b/src/x/screen.h
@@ -0,0 +1,51 @@
+// Copyright 2021 Benjamin Barenblat
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not
+// use this file except in compliance with the License. You may obtain a copy of
+// the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations under
+// the License.
+
+#ifndef GLPLANET_SRC_X_SCREEN_H_
+#define GLPLANET_SRC_X_SCREEN_H_
+
+#include <stdint.h>
+#include <xcb/xcb.h>
+#include <xcb/xcb_aux.h>
+
+#include "src/x/types.h"
+
+namespace x {
+
+// An X screen.
+//
+// This class is thread-safe.
+class Screen final {
+ public:
+  explicit Screen(xcb_screen_t* screen) noexcept : screen_(screen) {}
+
+  Screen(Screen&&) noexcept = default;
+  Screen& operator=(Screen&&) noexcept = default;
+
+  Id root() const noexcept { return screen_->root; }
+  Id black_pixel() const noexcept { return screen_->black_pixel; }
+
+  uint8_t DepthOfVisual(Id visual) const noexcept {
+    return xcb_aux_get_depth_of_visual(screen_, visual);
+  }
+
+  xcb_screen_t* AsXcbScreen() const noexcept { return screen_; }
+
+ private:
+  xcb_screen_t* screen_;
+};
+
+}  // namespace x
+
+#endif  // GLPLANET_SRC_X_SCREEN_H_
-- 
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