Services: Move to Userland/Services/

1 files changed, 98 insertions, 0 deletions

diff --git a/Userland/Services/WindowServer/Screen.h b/Userland/Services/WindowServer/Screen.h
new file mode 100644
index 0000000000..c435bc62c9
--- /dev/null
+++ b/Userland/Services/WindowServer/Screen.h
@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <Kernel/API/KeyCode.h>
+#include <LibGfx/Color.h>
+#include <LibGfx/Rect.h>
+#include <LibGfx/Size.h>
+
+struct MousePacket;
+
+namespace WindowServer {
+
+const double mouse_accel_max = 3.5;
+const double mouse_accel_min = 0.5;
+const unsigned scroll_step_size_min = 1;
+
+class Screen {
+public:
+    Screen(unsigned width, unsigned height);
+    ~Screen();
+
+    bool set_resolution(int width, int height);
+    bool can_set_buffer() { return m_can_set_buffer; }
+    void set_buffer(int index);
+
+    int width() const { return m_width; }
+    int height() const { return m_height; }
+    size_t pitch() const { return m_pitch; }
+    Gfx::RGBA32* scanline(int y);
+
+    static Screen& the();
+
+    Gfx::IntSize size() const { return { width(), height() }; }
+    Gfx::IntRect rect() const { return { 0, 0, width(), height() }; }
+
+    Gfx::IntPoint cursor_location() const { return m_cursor_location; }
+    unsigned mouse_button_state() const { return m_mouse_button_state; }
+
+    double acceleration_factor() const { return m_acceleration_factor; }
+    void set_acceleration_factor(double);
+
+    unsigned scroll_step_size() const { return m_scroll_step_size; }
+    void set_scroll_step_size(unsigned);
+
+    void on_receive_mouse_data(const MousePacket&);
+    void on_receive_keyboard_data(::KeyEvent);
+
+private:
+    void on_change_resolution(int pitch, int width, int height);
+
+    size_t m_size_in_bytes;
+
+    Gfx::RGBA32* m_framebuffer { nullptr };
+    bool m_can_set_buffer { false };
+
+    int m_pitch { 0 };
+    int m_width { 0 };
+    int m_height { 0 };
+    int m_framebuffer_fd { -1 };
+
+    Gfx::IntPoint m_cursor_location;
+    unsigned m_mouse_button_state { 0 };
+    unsigned m_modifiers { 0 };
+    double m_acceleration_factor { 1.0 };
+    unsigned m_scroll_step_size { 1 };
+};
+
+inline Gfx::RGBA32* Screen::scanline(int y)
+{
+    return reinterpret_cast<Gfx::RGBA32*>(((u8*)m_framebuffer) + (y * m_pitch));
+}
+
+}