From e6c3a80b01ffb52079783cddd9be6d392d0f7039 Mon Sep 17 00:00:00 2001
From: Benji Dial <benji@benjidial.net>
Date: Mon, 29 Jul 2024 19:59:52 -0400
Subject: redesign compositor protocol, start widget library

---
 libraries/pake/source/window.cpp | 78 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 libraries/pake/source/window.cpp

(limited to 'libraries/pake/source/window.cpp')

diff --git a/libraries/pake/source/window.cpp b/libraries/pake/source/window.cpp
new file mode 100644
index 0000000..c1c773f
--- /dev/null
+++ b/libraries/pake/source/window.cpp
@@ -0,0 +1,78 @@
+#include <pake/window.hpp>
+#include <cassert>
+
+//TODO: handle errors on socket connection, read, and write
+
+namespace pake {
+
+  window::window(int width, int height, const std::string &title)
+  : width(width), height(height), contents(width, height), root() {
+
+    euler::syscall::connect_to_socket("hilbert.compositor", socket);
+
+    assert(width >= 0 && height >= 0);
+
+    struct [[gnu::packed]] { uint8_t type; uint32_t width; uint32_t height; }
+      dimensions_pkt = {.type = 0x02, .width = (uint32_t)width, .height = (uint32_t)height };
+    euler::syscall::write_to_stream(socket, sizeof(dimensions_pkt), &dimensions_pkt);
+
+    assert(title.size() <= UINT32_MAX);
+
+    struct [[gnu::packed]] { uint8_t type; uint32_t length; }
+      title_pkt = {.type = 0x03, .length = (uint32_t)title.size() };
+    euler::syscall::write_to_stream(socket, sizeof(title_pkt), &title_pkt);
+    euler::syscall::write_to_stream(socket, title.size(), title.data());
+
+  }
+
+  window::~window() {
+    euler::syscall::close_stream(socket);
+  }
+
+  void window::show() {
+    uint8_t packet = 0;
+    euler::syscall::write_to_stream(socket, 1, &packet);
+  }
+
+  void window::hide() {
+    uint8_t packet = 1;
+    euler::syscall::write_to_stream(socket, 1, &packet);
+  }
+
+  void window::set_root(std::unique_ptr<widget> &&w) {
+    root = std::move(w);
+    root->notify_size(width, height);
+    root->render(contents, 0, 0, true);
+  }
+
+  void window::render_and_send_to_compositor() {
+
+    root->render(contents, 0, 0, false);
+    auto dirties = contents.get_dirty_regions();
+
+    for (auto it = dirties.cbegin(); it != dirties.cend(); ++it) {
+
+      struct [[gnu::packed]] {
+        uint8_t type;
+        uint32_t start_x; uint32_t start_y;
+        uint32_t   width; uint32_t  height;
+      } update_pkt = {
+        .type = 0x04,
+        .start_x = (uint32_t)it->start_x, .start_y = (uint32_t)it->start_y,
+        .  width = (uint32_t)it->  width, . height = (uint32_t)it-> height
+      };
+
+      euler::syscall::write_to_stream(socket, sizeof(update_pkt), &update_pkt);
+
+      for (int y = it->start_y; y < it->start_y + it->height; ++y)
+        euler::syscall::write_to_stream(socket,
+          it->width * sizeof(daguerre::hilbert_color),
+          &contents.image.at(it->start_x, y));
+
+    }
+
+    contents.clear_dirty();
+
+  }
+
+}
-- 
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