redesign compositor protocol, start widget library

8 files changed, 320 insertions, 0 deletions

diff --git a/libraries/pake/include/pake/dirtiable-image.hpp b/libraries/pake/include/pake/dirtiable-image.hpp
new file mode 100644
index 0000000..af09ade
--- /dev/null
+++ b/libraries/pake/include/pake/dirtiable-image.hpp
@@ -0,0 +1,27 @@
+#pragma once
+
+#include <daguerre/image.hpp>
+#include <list>
+
+namespace pake {
+
+  struct region {
+    int start_x;
+    int start_y;
+    int width;
+    int height;
+  };
+
+  struct dirtiable_image {
+
+    daguerre::image<daguerre::hilbert_color> image;
+    daguerre::image<bool> dirty;
+
+    std::vector<region> get_dirty_regions();
+    void clear_dirty();
+
+    dirtiable_image(int width, int height);
+
+  };
+
+}
diff --git a/libraries/pake/include/pake/widget.hpp b/libraries/pake/include/pake/widget.hpp
new file mode 100644
index 0000000..dad5651
--- /dev/null
+++ b/libraries/pake/include/pake/widget.hpp
@@ -0,0 +1,19 @@
+#pragma once
+
+#include <pake/dirtiable-image.hpp>
+
+namespace pake {
+
+  class widget {
+
+  public:
+    virtual ~widget() {}
+
+    virtual void render(
+      dirtiable_image &onto, int x_off, int y_off, bool force) = 0;
+
+    virtual void notify_size(int width, int height) = 0;
+
+  };
+
+}
diff --git a/libraries/pake/include/pake/widgets/fixed-text.hpp b/libraries/pake/include/pake/widgets/fixed-text.hpp
new file mode 100644
index 0000000..c6dafab
--- /dev/null
+++ b/libraries/pake/include/pake/widgets/fixed-text.hpp
@@ -0,0 +1,31 @@
+#pragma once
+
+#include <daguerre/fixed-font.hpp>
+#include <pake/widget.hpp>
+
+namespace pake::widgets {
+
+  class fixed_text : public widget {
+
+    const daguerre::fixed_font<bool> *font;
+    daguerre::hilbert_color bg, fg;
+    std::string text;
+
+    int width, height;
+
+  public:
+    //TODO: look up font in some kind of catalogue
+    fixed_text(
+      std::string &&text,
+      const daguerre::fixed_font<bool> *font,
+      daguerre::hilbert_color bg,
+      daguerre::hilbert_color fg);
+
+    virtual void render(
+      dirtiable_image &onto, int x_off, int y_off, bool force) override;
+
+    virtual void notify_size(int width, int height) override;
+
+  };
+
+}
diff --git a/libraries/pake/include/pake/window.hpp b/libraries/pake/include/pake/window.hpp
new file mode 100644
index 0000000..bb63b9d
--- /dev/null
+++ b/libraries/pake/include/pake/window.hpp
@@ -0,0 +1,32 @@
+#pragma once
+
+#include <pake/dirtiable-image.hpp>
+#include <pake/widget.hpp>
+#include <memory>
+
+namespace pake {
+
+  class window {
+
+    euler::syscall::stream_handle socket;
+
+    int width;
+    int height;
+
+    dirtiable_image contents;
+    std::unique_ptr<widget> root;
+
+  public:
+    window(int width, int height, const std::string &title);
+    ~window();
+
+    void show();
+    void hide();
+
+    void set_root(std::unique_ptr<widget> &&w);
+
+    void render_and_send_to_compositor();
+
+  };
+
+}
diff --git a/libraries/pake/makefile b/libraries/pake/makefile
new file mode 100644
index 0000000..28e7d37
--- /dev/null
+++ b/libraries/pake/makefile
@@ -0,0 +1,12 @@
+SOURCES = \
+  widgets/fixed-text.cpp dirtiable-image.cpp window.cpp
+
+build/%.cpp.o: source/%.cpp
+	@mkdir -p $(@D)
+	$(HILBERT_CC) -c $^ -o $@
+
+build/libpake.a: $(SOURCES:%=build/%.o)
+	$(HILBERT_AR) rcs $@ $^
+
+clean:
+	rm -rf build
diff --git a/libraries/pake/source/dirtiable-image.cpp b/libraries/pake/source/dirtiable-image.cpp
new file mode 100644
index 0000000..9e5c979
--- /dev/null
+++ b/libraries/pake/source/dirtiable-image.cpp
@@ -0,0 +1,80 @@
+#include <pake/dirtiable-image.hpp>
+
+namespace pake {
+
+  struct dirty_region_builder {
+
+    std::vector<region> regions_not_on_bottom;
+    std::list<region> regions_on_bottom;
+
+    void add_row(const std::vector<region> &row) {
+
+      std::list<region> new_regions_on_bottom;
+
+      for (auto i = row.begin(); i < row.end(); ++i) {
+        bool expanded = false;
+        for (auto j = regions_on_bottom.begin(); j != regions_on_bottom.end(); ++j)
+          if (i->start_x == j->start_x && i->width == j->width) {
+            j->height += i->height;
+            new_regions_on_bottom.push_back(*j);
+            regions_on_bottom.erase(j);
+            expanded = true;
+            break;
+          }
+        if (!expanded)
+          new_regions_on_bottom.push_back(*i);
+      }
+
+      for (auto i = regions_on_bottom.begin(); i != regions_on_bottom.end(); ++i)
+        regions_not_on_bottom.push_back(*i);
+
+      regions_on_bottom = std::move(new_regions_on_bottom);
+
+    }
+
+  };
+
+  std::vector<region> dirtiable_image::get_dirty_regions() {
+
+    dirty_region_builder builder;
+
+    std::vector<region> row;
+
+    for (int y = 0; y < dirty.height; ++y) {
+
+      int r = 0;
+      for (int x = 0; x < dirty.width; ++x)
+        if (!dirty.at(x, y)) {
+          if (r != x)
+            row.push_back({
+              .start_x = r, .start_y = y,
+              .width = x - r, .height = 1
+            });
+          r = x + 1;
+        }
+      if (r != dirty.width)
+        row.push_back({
+          .start_x = r, .start_y = y,
+          .width = dirty.width - r, .height = 1
+        });
+
+      builder.add_row(row);
+      row.clear();
+
+    }
+
+    builder.add_row(row);
+    return builder.regions_not_on_bottom;
+
+  }
+
+  void dirtiable_image::clear_dirty() {
+    dirty.fill(false);
+  }
+
+  dirtiable_image::dirtiable_image(int width, int height)
+  : image(width, height), dirty(width, height) {
+    dirty.fill(false);
+  }
+
+}
diff --git a/libraries/pake/source/widgets/fixed-text.cpp b/libraries/pake/source/widgets/fixed-text.cpp
new file mode 100644
index 0000000..9ae55dc
--- /dev/null
+++ b/libraries/pake/source/widgets/fixed-text.cpp
@@ -0,0 +1,41 @@
+#include <pake/widgets/fixed-text.hpp>
+
+static void draw_if_true(
+  daguerre::hilbert_color &out, const bool &in,
+  const daguerre::hilbert_color &param) {
+  if (in) out = param;
+}
+
+namespace pake::widgets {
+
+  fixed_text::fixed_text(
+    std::string &&text,
+    const daguerre::fixed_font<bool> *font,
+    daguerre::hilbert_color bg,
+    daguerre::hilbert_color fg)
+  : font(font), bg(bg), fg(fg), text(std::move(text)) {}
+
+  void fixed_text::render(
+    dirtiable_image &onto, int x_off, int y_off, bool force) {
+
+    if (force) {
+      onto.image.fill(  bg, x_off, y_off, width, height);
+      onto.dirty.fill(true, x_off, y_off, width, height);
+      //TODO: have options for alignment
+      //TODO: check overflow
+      onto.image.render_text(
+        *font, fg, x_off, y_off,
+        text.data(), draw_if_true);
+      onto.dirty.fill(
+        true, x_off, y_off,
+        font->glyph_width * text.size(),
+        font->glyph_height);
+    }
+
+  }
+
+  void fixed_text::notify_size(int width, int height) {
+    this->width = width; this->height = height;
+  }
+
+}
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();
+
+  }
+
+}