FontAwesome icons (#119)

* Add FontAwesome fonts

* Support copying .ttf files

Also ignore .txt files (we want to keep licenses near assets)

* Support loading FontAwesome into dear imgui

* Load and use FontAwesome in shell

* Add some more icons

Using a lemon since we don't have a potato icon

resources/fonts/fontawesome5/LICENSE.txt

@@ -0,0 +1,34 @@
+Font Awesome Free License
+-------------------------
+
+Font Awesome Free is free, open source, and GPL friendly. You can use it for
+commercial projects, open source projects, or really almost whatever you want.
+Full Font Awesome Free license: https://fontawesome.com/license/free.
+
+# Icons: CC BY 4.0 License (https://creativecommons.org/licenses/by/4.0/)
+In the Font Awesome Free download, the CC BY 4.0 license applies to all icons
+packaged as SVG and JS file types.
+
+# Fonts: SIL OFL 1.1 License (https://scripts.sil.org/OFL)
+In the Font Awesome Free download, the SIL OFL license applies to all icons
+packaged as web and desktop font files.
+
+# Code: MIT License (https://opensource.org/licenses/MIT)
+In the Font Awesome Free download, the MIT license applies to all non-font and
+non-icon files.
+
+# Attribution
+Attribution is required by MIT, SIL OFL, and CC BY licenses. Downloaded Font
+Awesome Free files already contain embedded comments with sufficient
+attribution, so you shouldn't need to do anything additional when using these
+files normally.
+
+We've kept attribution comments terse, so we ask that you do not actively work
+to remove them from files, especially code. They're a great way for folks to
+learn about Font Awesome.
+
+# Brand Icons
+All brand icons are trademarks of their respective owners. The use of these
+trademarks does not indicate endorsement of the trademark holder by Font
+Awesome, nor vice versa. **Please do not use brand logos for any purpose except
+to represent the company, product, or service to which they refer.**

source/app/recon/private/converter_app.cpp

@@ -134,12 +134,16 @@ void up::recon::ConverterApp::registerConverters() {
 #endif
     _converters.push_back({[](string_view path) { return path::extension(path) == ".hlsli"; },
                            new_box<IgnoreConverter>()});
+    _converters.push_back({[](string_view path) { return path::extension(path) == ".txt"; },
+                           new_box<IgnoreConverter>()});
     _converters.push_back({[](string_view path) { return path::extension(path) == ".json"; },
                            new_box<JsonConverter>()});
     _converters.push_back({[](string_view path) { return path::extension(path) == ".png"; },
                            new_box<CopyConverter>()});
     _converters.push_back({[](string_view path) { return path::extension(path) == ".jpg"; },
                            new_box<CopyConverter>()});
+    _converters.push_back({[](string_view path) { return path::extension(path) == ".ttf"; },
+                           new_box<CopyConverter>()});
     _converters.push_back({[](string_view path) { return path::extension(path) == ".obj"; },
                            new_box<ModelConverter>()});
 }

source/app/shell/private/shell_app.cpp

@@ -137,6 +137,15 @@ int up::ShellApp::initialize() {
     }
 
     _drawImgui.bindShaders(std::move(imguiVertShader), std::move(imguiPixelShader));
+    auto fontStream = _fileSystem.openRead("resources/fonts/fontawesome5/fa-solid-900.ttf");
+    if (!fontStream) {
+        _errorDialog("Failed to open FontAwesome font");
+        return 1;
+    }
+    if (!_drawImgui.loadFontAwesome5(std::move(fontStream))) {
+        _errorDialog("Failed to load FontAwesome font");
+        return 1;
+    }
     _drawImgui.createResources(*_device);
 
     _camera.lookAt({0, 10, 15}, {0, 0, 0}, {0, 1, 0});
@@ -286,14 +295,14 @@ void up::ShellApp::_drawUI() {
     if (ImGui::BeginMainMenuBar()) {
         menuSize = ImGui::GetWindowSize();
 
-        if (ImGui::BeginMenu("Potato")) {
-            if (ImGui::MenuItem("Quit", "ESC")) {
+        if (ImGui::BeginMenu(u8"\uf094 Potato")) {
+            if (ImGui::MenuItem(u8"\uf52b Quit", "ESC")) {
                 _running = false;
             }
             ImGui::EndMenu();
         }
 
-        if (ImGui::BeginMenu("View")) {
+        if (ImGui::BeginMenu(u8"\uf06e View")) {
             if (ImGui::BeginMenu("Camera")) {
                 if (ImGui::MenuItem("Fly", "ctrl-f")) {
                     _cameraController = new_box<FlyCameraController>(_camera);
@@ -316,7 +325,7 @@ void up::ShellApp::_drawUI() {
         ImGui::Spacing();
         ImGui::Spacing();
 
-        if (ImGui::MenuItem(!_paused ? "Pause" : "Play", "F5")) {
+        if (ImGui::MenuItem(!_paused ? u8"\uf04c Pause" : u8"\uf04b Play", "F5")) {
             _paused = !_paused;
         }
 

source/library/render/private/draw_imgui.cpp

@@ -66,6 +66,31 @@ bool up::DrawImgui::createResources(GpuDevice& device) {
     return true;
 }
 
+auto up::DrawImgui::loadFontAwesome5(Stream fontFile) -> bool {
+    static constexpr auto s_minGlyph = 0xf000;
+    static constexpr auto s_maxGlyph = 0xf897;
+    static constexpr ImWchar s_ranges[] = {s_minGlyph, s_maxGlyph, 0};
+
+    _ensureContext();
+
+    ImGui::SetCurrentContext(_context.get());
+    auto& io = ImGui::GetIO();
+
+    vector<byte> fontData;
+    if (readBinary(fontFile, fontData) != IOResult::Success) {
+        return false;
+    }
+
+
+    ImFontConfig config; // = {.MergeMode = true, .PixelSnapH = true};
+    config.MergeMode = true;
+    config.PixelSnapH = true;
+    config.FontDataOwnedByAtlas = false;
+
+    auto font = io.Fonts->AddFontFromMemoryTTF(fontData.data(), static_cast<int>(fontData.size()), 13.0f, &config, s_ranges);
+    return font != nullptr;
+}
+
 void up::DrawImgui::releaseResources() {
     _indexBuffer.reset();
     _vertexBuffer.reset();
@@ -264,6 +289,8 @@ void up::DrawImgui::_ensureContext() {
     ImGui::SetCurrentContext(_context.get());
     auto& io = ImGui::GetIO();
 
+    io.Fonts->AddFontDefault();
+
     io.BackendPlatformName = "potato::grui";
     io.IniFilename = nullptr;
 

source/library/render/public/potato/render/draw_imgui.h

@@ -7,6 +7,7 @@
 #include "potato/foundation/rc.h"
 #include "potato/foundation/unique_resource.h"
 #include "potato/foundation/string.h"
+#include "potato/filesystem/stream.h"
 
 namespace up {
     class GpuBuffer;
@@ -37,6 +38,8 @@ namespace up {
         UP_RENDER_API bool createResources(GpuDevice& device);
         UP_RENDER_API void releaseResources();
 
+        UP_RENDER_API bool loadFontAwesome5(Stream fontFile);
+
         UP_RENDER_API bool handleEvent(SDL_Event const& ev);
 
         UP_RENDER_API void beginFrame();