6 files changed, 277 insertions, 4 deletions

diff --git a/src/AssetManager.cpp b/src/AssetManager.cpp
index 514d008..0db495a 100644
--- a/src/AssetManager.cpp
+++ b/src/AssetManager.cpp
@@ -402,22 +402,26 @@ void ParseAssetShader(AssetTreeNode &node) {
 		std::string vertPath = j["vert"].get<std::string>();
 		std::string fragPath = j["frag"].get<std::string>();
 
-		AssetTreeNode *vertAsset = AssetManager::GetAssetByAssetName(vertPath);
-		AssetTreeNode *fragAsset = AssetManager::GetAssetByAssetName(fragPath);
+		AssetTreeNode* vertAsset = AssetManager::GetAssetByAssetName(vertPath);
+		AssetTreeNode* fragAsset = AssetManager::GetAssetByAssetName(fragPath);
 		std::string vertSource((char*)vertAsset->data.data(), (char*)vertAsset->data.data() + vertAsset->data.size());
 		std::string fragSource((char*)fragAsset->data.data(), (char*)fragAsset->data.data() + fragAsset->data.size());
 
 		std::vector<std::string> uniforms;
 
-		for (auto &it : j["uniforms"]) {
+		for (auto& it : j["uniforms"]) {
 			uniforms.push_back(it.get<std::string>());
 		}
 
 		node.asset = std::make_unique<AssetShader>();
-		AssetShader *asset = dynamic_cast<AssetShader*>(node.asset.get());
+		AssetShader* asset = dynamic_cast<AssetShader*>(node.asset.get());
 		asset->shader = std::make_unique<Shader>(vertSource, fragSource, uniforms);
+	} catch (std::exception &e) {
+		glCheckError();
+		LOG(ERROR) << "Shader asset parsing failed: " << e.what();
 	} catch (...) {
 		glCheckError();
+		LOG(ERROR) << "Shader asset parsing failed with unknown reason";
 		return;
 	}
 }
diff --git a/src/Render.cpp b/src/Render.cpp
index d583205..7835b98 100644
--- a/src/Render.cpp
+++ b/src/Render.cpp
@@ -3,6 +3,7 @@
 #include <imgui.h>
 #include <easylogging++.h>
 #include <optick.h>
+#include <RmlUi/Core.h>
 
 #include "imgui_impl_sdl_gl3.h"
 #include "Shader.hpp"
@@ -16,6 +17,7 @@
 #include "Settings.hpp"
 #include "Framebuffer.hpp"
 #include "Plugin.hpp"
+#include "Rml.hpp"
 
 Render::Render(unsigned int windowWidth, unsigned int windowHeight,
                std::string windowTitle) {
@@ -31,6 +33,8 @@ Render::Render(unsigned int windowWidth, unsigned int windowHeight,
 	glCheckError();
     PrepareToRendering();
     glCheckError();
+    InitRml();
+    glCheckError();
 
 	//Read settings
 	strcpy(fieldUsername, Settings::Read("username", "HelloOne").c_str());
@@ -73,6 +77,10 @@ Render::~Render() {
 	Settings::WriteDouble("resolutionScale", fieldResolutionScale);
 	Settings::Save();
 
+    Rml::RemoveContext("default");
+    rmlRender.reset();
+    rmlSystem.reset();
+
 	PluginSystem::Init();
 
 	framebuffer.reset();
@@ -125,6 +133,7 @@ void Render::InitGlew() {
     glViewport(0, 0, width, height);
 	glClearColor(0.8,0.8,0.8, 1.0f);
     glEnable(GL_DEPTH_TEST);
+    glDepthFunc(GL_LEQUAL);
 
     glEnable(GL_CULL_FACE);
     glCullFace(GL_BACK);
@@ -220,6 +229,8 @@ void Render::HandleEvents() {
                         SDL_GL_GetDrawableSize(window, &width, &height);
                         renderState.WindowWidth = width;
                         renderState.WindowHeight = height;
+                        rmlRender->Update(width, height);
+                        rmlContext->SetDimensions(Rml::Vector2i(width, height));
 						framebuffer->Resize(width * fieldResolutionScale, height * fieldResolutionScale);
 						Framebuffer::GetDefault().Resize(width, height);
                         break;
@@ -331,6 +342,7 @@ void Render::HandleEvents() {
                 break;
         }
     }
+    rmlContext->Update();
 }
 
 void Render::HandleMouseCapture() {
@@ -366,6 +378,9 @@ void Render::Update() {
 
 void Render::RenderGui() {
 	OPTICK_EVENT();
+
+    rmlContext->Render();
+
     ImGui_ImplSdlGL3_NewFrame(window);
 
     if (isMouseCaptured) {
@@ -750,3 +765,28 @@ void Render::InitEvents() {
         }
     });
 }
+
+void Render::InitRml() {
+    LOG(INFO) << "Initializing Rml";
+
+    rmlSystem = std::make_unique<RmlSystemInterface>();
+    Rml::SetSystemInterface(rmlSystem.get());
+
+    rmlRender = std::make_unique<RmlRenderInterface>(renderState);
+    Rml::SetRenderInterface(rmlRender.get());
+    rmlRender->Update(renderState.WindowWidth, renderState.WindowHeight);
+
+    if (!Rml::Initialise())
+        LOG(WARNING) << "Rml not initialized";
+
+    rmlContext = Rml::CreateContext("default", Rml::Vector2i(renderState.WindowWidth, renderState.WindowHeight));
+
+    if (!Rml::LoadFontFace("OpenSans-Regular.ttf"))
+        LOG(WARNING) << "Rml font not loaded";
+
+    Rml::ElementDocument* document = rmlContext->LoadDocument("test.rml");
+    if (document)
+        document->Show();
+    else
+        LOG(WARNING) << "Rml document not loaded";
+}
diff --git a/src/Render.hpp b/src/Render.hpp
index 8e2e233..a8c437c 100644
--- a/src/Render.hpp
+++ b/src/Render.hpp
@@ -13,6 +13,12 @@
 
 class RendererWorld;
 class Framebuffer;
+class RmlRenderInterface;
+class RmlSystemInterface;
+namespace Rml
+{
+	class Context;
+}
 
 class Render {
     SDL_Window *window;
@@ -43,6 +49,9 @@ class Render {
 	bool fieldFlight;
 	float fieldBrightness;
 	float fieldResolutionScale;
+	std::unique_ptr<RmlRenderInterface> rmlRender;
+	std::unique_ptr<RmlSystemInterface> rmlSystem;
+	Rml::Context* rmlContext;
 
 	void SetMouseCapture(bool IsCaptured);
 
@@ -64,6 +73,8 @@ class Render {
 
 	void InitEvents();
 
+	void InitRml();
+
 public:
 	Render(unsigned int windowWidth, unsigned int windowHeight, std::string windowTitle);
 	~Render();
diff --git a/src/Rml.cpp b/src/Rml.cpp
new file mode 100644
index 0000000..7987121
--- /dev/null
+++ b/src/Rml.cpp
@@ -0,0 +1,154 @@
+#include "Rml.hpp"
+
+#include <easylogging++.h>
+
+#include "AssetManager.hpp"
+#include "Shader.hpp"
+#include "Utility.hpp"
+
+double RmlSystemInterface::GetElapsedTime() {
+	return totalTime;
+}
+
+bool RmlSystemInterface::LogMessage(Rml::Log::Type type, const Rml::String& message) {
+    switch (type) {
+    case Rml::Log::Type::LT_ALWAYS:
+        LOG(ERROR) << message;
+        break;
+    case Rml::Log::Type::LT_ERROR:
+        LOG(ERROR) << message;
+        break;
+    case Rml::Log::Type::LT_ASSERT:
+        LOG(ERROR) << message;
+        break;
+    case Rml::Log::Type::LT_WARNING:
+        LOG(WARNING) << message;
+        break;
+    case Rml::Log::Type::LT_INFO:
+        LOG(INFO) << message;
+        break;
+    case Rml::Log::Type::LT_DEBUG:
+        LOG(DEBUG) << message;
+        break;
+    case Rml::Log::Type::LT_MAX:
+        LOG(DEBUG) << message;
+        break;
+    }
+    return true;
+}
+
+RmlRenderInterface::RmlRenderInterface(RenderState& renderState) : State(&renderState) {
+    glGenVertexArrays(1, &Vao);
+    glBindVertexArray(Vao);
+    glCheckError();
+
+    glGenBuffers(1, &Ebo);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, Ebo);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, 0, nullptr, GL_STREAM_DRAW);
+    glCheckError();
+
+    glGenBuffers(1, &Vbo);
+    glBindBuffer(GL_ARRAY_BUFFER, Vbo);
+    glBufferData(GL_ARRAY_BUFFER, 0, nullptr, GL_STREAM_DRAW);
+    glCheckError();
+    
+    {
+        //Vertex position (2 float)
+        GLuint PosAttribPos = 0;
+        glVertexAttribPointer(PosAttribPos, 2, GL_FLOAT, GL_FALSE, 20, (void*)0);
+        glEnableVertexAttribArray(PosAttribPos);
+
+        //Vertex colour (4 uint8 RGBA)
+        GLuint ColAttribPos = 1;
+        glVertexAttribIPointer(ColAttribPos, 4, GL_UNSIGNED_BYTE, 20, (void*)8);
+        glEnableVertexAttribArray(ColAttribPos);
+
+        //Vertex tex_coord (2 float)
+        GLuint TexAttribPos = 2;
+        glVertexAttribPointer(TexAttribPos, 2, GL_FLOAT, GL_FALSE, 20, (void*)12);
+        glEnableVertexAttribArray(TexAttribPos);
+    }
+    glBindVertexArray(0);
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+    glCheckError();
+}
+
+RmlRenderInterface::~RmlRenderInterface() {
+    glDeleteVertexArrays(1, &Vao);
+    glDeleteBuffers(1, &Vbo);
+    glDeleteBuffers(1, &Ebo);
+    glCheckError();
+}
+
+void RmlRenderInterface::RenderGeometry(Rml::Vertex* vertices, int num_vertices, int* indices, int num_indices, Rml::TextureHandle texture, const Rml::Vector2f& translation) {
+    if (texture) {
+        AssetManager::GetAsset<AssetShader>("/altcraft/shaders/rmltex")->shader->Activate();
+        glBindTexture(GL_TEXTURE_2D, texture);
+    }
+    else
+        AssetManager::GetAsset<AssetShader>("/altcraft/shaders/rml")->shader->Activate();
+    glCheckError();
+
+    glBindVertexArray(Vao);
+    glCheckError();
+
+    glBindBuffer(GL_ARRAY_BUFFER, Vbo);
+    glBufferData(GL_ARRAY_BUFFER, num_vertices * sizeof(Rml::Vertex), vertices, GL_STREAM_DRAW);
+    glCheckError();
+
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, Ebo);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, num_indices * sizeof(int), indices, GL_STREAM_DRAW);
+    glCheckError();
+
+    glDrawElements(GL_TRIANGLES, num_indices, GL_UNSIGNED_INT, 0);
+    glCheckError();
+    glBindVertexArray(0);
+}
+
+void RmlRenderInterface::EnableScissorRegion(bool enable) {
+
+}
+
+void RmlRenderInterface::SetScissorRegion(int x, int y, int width, int height) {
+
+}
+
+bool RmlRenderInterface::LoadTexture(Rml::TextureHandle& texture_handle, Rml::Vector2i& texture_dimensions, const Rml::String& source) {
+    return false;
+}
+
+bool RmlRenderInterface::GenerateTexture(Rml::TextureHandle& texture_handle, const Rml::byte* source, const Rml::Vector2i& source_dimensions) {
+    int mipLevelCount = 1;
+    glActiveTexture(GL_TEXTURE0);
+    GLuint texture;
+    glGenTextures(1, &texture);
+    glBindTexture(GL_TEXTURE_2D, texture);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    glCheckError();
+
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, source_dimensions.x, source_dimensions.y, 0, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8_REV, source);
+    glCheckError();
+
+    texture_handle = texture;
+    return true;
+}
+
+void RmlRenderInterface::ReleaseTexture(Rml::TextureHandle texture) {
+    GLuint textures = texture;
+    glDeleteTextures(1, &textures);
+    glCheckError();
+}
+
+void RmlRenderInterface::Update(unsigned int windowWidth, unsigned int windowHeight) {
+    AssetManager::GetAsset<AssetShader>("/altcraft/shaders/rml")->shader->Activate();
+    AssetManager::GetAsset<AssetShader>("/altcraft/shaders/rml")->shader->SetUniform("viewportSize", windowWidth, windowHeight);
+    glCheckError();
+    AssetManager::GetAsset<AssetShader>("/altcraft/shaders/rmltex")->shader->Activate();
+    AssetManager::GetAsset<AssetShader>("/altcraft/shaders/rmltex")->shader->SetUniform("viewportSize", windowWidth, windowHeight);
+    AssetManager::GetAsset<AssetShader>("/altcraft/shaders/rmltex")->shader->SetUniform("fontTexture", 0);
+    glCheckError();
+}
diff --git a/src/Rml.hpp b/src/Rml.hpp
new file mode 100644
index 0000000..5815c3e
--- /dev/null
+++ b/src/Rml.hpp
@@ -0,0 +1,56 @@
+#pragma once
+
+#include <RmlUi/Core/SystemInterface.h>
+#include <RmlUi/Core/RenderInterface.h>
+
+#include "Renderer.hpp"
+
+class RmlSystemInterface : public Rml::SystemInterface {
+	double totalTime;
+
+public:
+
+	virtual double GetElapsedTime() override;
+
+	virtual bool LogMessage(Rml::Log::Type type, const Rml::String& message) override;
+
+	inline void Update(double timeToUpdate) {
+		totalTime += timeToUpdate;
+	}
+
+};
+
+class RmlRenderInterface : public Rml::RenderInterface {
+	RenderState* State;
+
+	GLuint Vao, Vbo, Ebo;
+
+public:
+
+	RmlRenderInterface(RenderState &renderState);
+
+	RmlRenderInterface(const RmlRenderInterface&) = delete;
+
+	RmlRenderInterface(RmlRenderInterface&&) = delete;
+
+	RmlRenderInterface& operator=(const RmlRenderInterface&) = delete;
+
+	RmlRenderInterface& operator=(RmlRenderInterface&&) = delete;
+
+	~RmlRenderInterface();
+
+	virtual void RenderGeometry(Rml::Vertex* vertices, int num_vertices, int* indices, int num_indices, Rml::TextureHandle texture, const Rml::Vector2f& translation) override;
+
+	virtual void EnableScissorRegion(bool enable) override;
+
+	virtual void SetScissorRegion(int x, int y, int width, int height) override;
+
+	virtual bool LoadTexture(Rml::TextureHandle& texture_handle, Rml::Vector2i& texture_dimensions, const Rml::String& source) override;
+	
+	virtual bool GenerateTexture(Rml::TextureHandle& texture_handle, const Rml::byte* source, const Rml::Vector2i& source_dimensions) override;
+	
+	virtual void ReleaseTexture(Rml::TextureHandle texture) override;
+
+	void Update(unsigned int windowWidth, unsigned int windowHeight);
+
+};
diff --git a/src/Shader.hpp b/src/Shader.hpp
index 8e1ce9e..6b3220d 100644
--- a/src/Shader.hpp
+++ b/src/Shader.hpp
@@ -26,10 +26,18 @@ public:
 
 	void Activate();
 
+	inline void SetUniform(const std::string& name, unsigned int val, unsigned int val2) {
+		glUniform2ui(GetUniformLocation(name), val, val2);
+	}
+
 	inline void SetUniform(const std::string &name, int val) {
 		glUniform1i(GetUniformLocation(name), val);
 	}
 
+	inline void SetUniform(const std::string& name, int val, int val2) {
+		glUniform2i(GetUniformLocation(name), val, val2);
+	}
+
 	inline void SetUniform(const std::string &name, float val) {
 		glUniform1f(GetUniformLocation(name), val);
 	}