From 79bc598ef93e8ee24ccbeb04325748eea8423dad Mon Sep 17 00:00:00 2001
From: Joshua Goins <josh@redstrate.com>
Date: Fri, 18 Feb 2022 16:57:14 -0500
Subject: [PATCH] Fill out web platform backend with a main loop

---
 platforms/web/CMakeLists.txt |   2 +
 platforms/web/main.cpp.in    | 175 ++++++++++++++++++++++++++++++++++-
 2 files changed, 175 insertions(+), 2 deletions(-)

diff --git a/platforms/web/CMakeLists.txt b/platforms/web/CMakeLists.txt
index f18c40b..3568971 100644
--- a/platforms/web/CMakeLists.txt
+++ b/platforms/web/CMakeLists.txt
@@ -5,6 +5,8 @@ add_platform(
         main.cpp.in
         LINK_LIBRARIES
         Core
+        GFXWebGPU
+        Log
 )
 
 function(add_platform_commands target)
diff --git a/platforms/web/main.cpp.in b/platforms/web/main.cpp.in
index 43ada95..25bf403 100644
--- a/platforms/web/main.cpp.in
+++ b/platforms/web/main.cpp.in
@@ -1,7 +1,178 @@
 #include <stdio.h>
+#include <@APP_INCLUDE@>
+#include <emscripten/html5.h>
+
+#include "engine.hpp"
+#include "platform.hpp"
+#include "gfx_webgpu.hpp"
+#include "file.hpp"
+
+@APP_CLASS@* app = nullptr;
+GFX* gfx_interface = nullptr;
+
+EM_BOOL draw(double time, void *userData) {
+    printf("Draw\n");
+
+    engine->update(time);
+    engine->begin_frame(time);
+
+    engine->render((void*)1);
+
+    engine->end_frame();
+
+    return true;
+}
 
 int main(int argc, char* argv[]) {
-    printf("Hello, world!\n");
+    engine = new prism::engine(argc, argv);
+
+    app = new @APP_CLASS@();
+    engine->set_app(app);
+
+    GFXCreateInfo info = {};
+    gfx_interface = new GFXWebGPU();
+    if(gfx_interface->initialize(info)) {
+        engine->set_gfx(gfx_interface);
+    } else {
+        return -1;
+    }
+
+    app_main(engine);
+
+    engine->add_window(nullptr, (void*)1, {100, 100}});
+    app->initialize_render();
+
+    emscripten_request_animation_frame_loop(draw, nullptr);
 
     return 0;
-}
\ No newline at end of file
+}
+
+void platform::capture_mouse(const bool capture) {
+
+}
+
+PlatformTheme platform::get_theme() {
+    return PlatformTheme::Light;
+}
+
+void platform::begin_text_input() {
+}
+
+void platform::end_text_input() {
+}
+
+void* platform::create_native_surface(platform::window_ptr index, void* instance) {
+    return nullptr;
+}
+
+bool platform::is_main_window(platform::window_ptr index) {
+    return true;
+}
+
+std::vector<const char*> platform::get_native_surface_extension() {
+    return {};
+}
+
+void platform::show_window(const platform::window_ptr index) {
+
+}
+
+bool platform::supports_feature(const PlatformFeature feature) {
+    return false;
+}
+
+prism::Offset platform::get_cursor_position() {
+    return {0, 0};
+}
+
+std::tuple<float, float> platform::get_right_stick_position() {
+    return {0, 0};
+}
+
+std::tuple<float, float> platform::get_left_stick_position() {
+    return {0, 0};
+}
+
+bool platform::get_key_down(InputButton key) {
+    return false;
+}
+
+platform::window_ptr platform::open_window(const std::string_view title, const prism::Rectangle rect, const WindowFlags flags) {
+   return (void*)1;
+}
+
+void platform::set_window_title(const platform::window_ptr index, const std::string_view title) {
+
+}
+
+bool platform::is_window_focused(const platform::window_ptr index) {
+
+}
+
+void platform::set_window_focused(const platform::window_ptr index) {
+
+}
+
+prism::Extent platform::get_window_size(const platform::window_ptr index) {
+    return {100, 100};
+}
+
+prism::Extent platform::get_window_drawable_size(const platform::window_ptr index) {
+    return {100, 100};
+}
+
+prism::Offset platform::get_window_position(const platform::window_ptr index) {
+
+}
+
+void platform::set_window_size(const platform::window_ptr index, const prism::Extent extent) {
+
+}
+
+void platform::set_window_position(const platform::window_ptr index, const prism::Offset offset) {
+
+}
+
+void platform::close_window(const platform::window_ptr index) {
+
+}
+
+int platform::get_keycode(const InputButton button) {
+    return 0;
+}
+
+prism::Rectangle platform::get_monitor_resolution() {
+    return {0, 0, 100, 100};
+}
+
+prism::Rectangle platform::get_monitor_work_area() {
+    return {0, 0, 100, 100};
+}
+
+prism::Offset platform::get_screen_cursor_position() {
+
+}
+
+bool platform::get_mouse_button_down(const int index) {
+    return false;
+}
+
+float platform::get_monitor_dpi() {
+    return 1.0f;
+}
+
+std::tuple<float, float> platform::get_wheel_delta() {
+
+}
+
+const char* platform::get_name() {
+    return "Web";
+}
+
+void prism::set_domain_path(const prism::domain domain, const prism::path& path) {
+
+}
+
+prism::path prism::get_writeable_directory() {
+
+}