Improve API regarding server-side GL capabilities, fix font transparency

inferno/src/inferno/application.cpp

@@ -46,6 +46,8 @@ namespace Inferno {
 		m_scene = std::make_shared<Scene>();
 		m_scene->initialize();
 
+		RenderCommand::initialize();
+
 		Renderer2D* renderer2D = new Renderer2D();
 		renderer2D->initialize();
 
@@ -65,6 +67,7 @@ namespace Inferno {
 		FontManager::the().destroy();
 		RendererCharacter::the().destroy();
 		Renderer2D::the().destroy();
+		RenderCommand::destroy();
 		m_scene->destroy();
 		TextureManager::the().destroy();
 		ShaderManager::the().destroy();
@@ -186,7 +189,7 @@ namespace Inferno {
 
 		infoln("WindowResizeEvent {}x{} triggered", e.getWidth(), e.getHeight());
 
-		m_window->getContext()->setViewport(0, 0, e.getWidth(), e.getHeight());
+		RenderCommand::setViewport(0, 0, e.getWidth(), e.getHeight());
 
 		return true;
 	}

inferno/src/inferno/render/context.cpp

@@ -12,14 +12,14 @@ namespace Inferno {
 	Context::Context(GLFWwindow* window) :
 		m_window(window)
 	{
+		ASSERT(window, "Context window is nullptr!");
 	}
 
-// -----------------------------------------
-
 	void Context::initialize()
 	{
+		Context::setCurrent();
+
 		// Initialize glad
-		glfwMakeContextCurrent(m_window);
 		int glad = gladLoadGLLoader((GLADloadproc)glfwGetProcAddress);
 		ASSERT(glad, "Failed to initialize glad!");
 
@@ -29,34 +29,12 @@ namespace Inferno {
 		comment() << "  Renderer: " << glGetString(GL_RENDERER);
 		comment() << "  Version:  " << glGetString(GL_VERSION);
 
-#ifdef NF_ENABLE_ASSERTS
+		// Check OpenGL version
-		int versionMajor;
+		ASSERT(GLVersion.major > 4 || (GLVersion.major == 4 && GLVersion.minor >= 5),
-		int versionMinor;
-		glGetIntegerv(GL_MAJOR_VERSION, &versionMajor);
-		glGetIntegerv(GL_MINOR_VERSION, &versionMinor);
-		ASSERT(versionMajor > 4 || (versionMajor == 4 && versionMinor >= 5),
 			"Inferno requires at least OpenGL version 4.5!");
-#endif
-
-		Window& w = *(Window*)glfwGetWindowUserPointer(m_window);
-
-		// Disable vsync
-		if (!w.isVSync()) {
-			glfwSwapInterval(0);
 	}
 
-		// Set viewport
+	void Context::destroy()
-		this->setViewport(0, 0, w.getWidth(), w.getHeight());
-
-		// Enable z-buffer / depth buffer
-		glEnable(GL_DEPTH_TEST);
-
-		// Enable transparency
-		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-		glEnable(GL_BLEND);
-	}
-
-	void Context::update()
 	{
 	}
 
@@ -65,14 +43,10 @@ namespace Inferno {
 		glfwSwapBuffers(m_window);
 	}
 
-	void Context::destroy()
+	void Context::setCurrent()
 	{
+		// Set current OpenGL context to this window
+		glfwMakeContextCurrent(m_window);
 	}
 
-// -----------------------------------------
-
-	void Context::setViewport(int x, int y, int width, int height) const
-	{
-		glViewport(x, y, width, height);
-	}
 }

inferno/src/inferno/render/context.h

@@ -8,18 +8,12 @@ namespace Inferno {
 	class Context {
 	public:
 		Context(GLFWwindow* window);
-		// virtual ~Context();
-
-// -----------------------------------------
 
 		void initialize();
-		void update();
-		void render();
 		void destroy();
+		void render();
 
-// -----------------------------------------
+		void setCurrent();
-
-		void setViewport(int x, int y, int width, int height) const;
 
 	private:
 		GLFWwindow* m_window;

inferno/src/inferno/render/renderer.cpp

@@ -11,6 +11,21 @@
 
 namespace Inferno {
 
+	void RenderCommand::initialize()
+	{
+		setDepthTest(true);
+
+		// Enable transparency
+		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+		glEnable(GL_BLEND);
+
+		info() << "RenderCommand initialized";
+	}
+
+	void RenderCommand::destroy()
+	{
+	}
+
 	void RenderCommand::clear()
 	{
 		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
@@ -27,6 +42,24 @@ namespace Inferno {
  		glDrawElements(GL_TRIANGLES, count, GL_UNSIGNED_INT, nullptr);
 	}
 
+	void RenderCommand::setViewport(int32_t x, int32_t y, uint32_t width, uint32_t height)
+	{
+		glViewport(x, y, width, height);
+	}
+
+	void RenderCommand::setDepthTest(bool enabled)
+	{
+		// Set z-buffer / depth buffer
+		enabled ? glEnable(GL_DEPTH_TEST) : glDisable(GL_DEPTH_TEST);
+	}
+
+	bool RenderCommand::depthTest()
+	{
+		unsigned char depthTest = GL_FALSE;
+		glGetBooleanv(GL_DEPTH_TEST, &depthTest);
+		return depthTest == GL_TRUE;
+	}
+
 	int32_t RenderCommand::textureUnitAmount()
 	{
 		int32_t amount = 0;
@@ -397,7 +430,10 @@ namespace Inferno {
 		bind();
 
 		// Render
+		bool depthTest = RenderCommand::depthTest();
+		RenderCommand::setDepthTest(false);
 		RenderCommand::drawIndexed(m_vertexArray, m_quadIndex * indexPerQuad);
+		RenderCommand::setDepthTest(depthTest);
 
 		unbind();
 	}

inferno/src/inferno/render/renderer.h

@@ -1,7 +1,7 @@
 #ifndef RENDERER_H
 #define RENDERER_H
 
-#include <cstdint> // std::uint32_t
+#include <cstdint> // std::int32_t, std::uint32_t
 #include <memory>  // std::shared_ptr, std::unique_ptr, std::make_shared, std::make_unique
 
 #include "glm/ext/matrix_float4x4.hpp" // glm::mat4
@@ -42,11 +42,17 @@ namespace Inferno {
 
 	class RenderCommand {
 	public:
+		static void initialize();
+		static void destroy();
+
 		static void clear();
 		static void clearColor(const glm::vec4& color);
-
 		static void drawIndexed(const std::shared_ptr<VertexArray>& vertexArray, uint32_t indexCount = 0);
 
+		static void setViewport(int32_t x, int32_t y, uint32_t width, uint32_t height);
+		static void setDepthTest(bool enabled);
+
+		static bool depthTest();
 		static int32_t textureUnitAmount();
 	};
 

inferno/src/inferno/window.cpp

@@ -5,10 +5,11 @@
 #include "inferno/event/applicationevent.h"
 #include "inferno/event/keyevent.h"
 #include "inferno/event/mouseevent.h"
-#include "inferno/keycodes.h"
 #include "inferno/io/input.h"
 #include "inferno/io/log.h"
+#include "inferno/keycodes.h"
 #include "inferno/render/context.h"
+#include "inferno/render/renderer.h"
 #include "inferno/settings.h"
 #include "inferno/window.h"
 
@@ -41,6 +42,7 @@ namespace Inferno {
 		std::string title      = m_properties.title;
 		unsigned int width     = m_properties.width;
 		unsigned int height    = m_properties.height;
+		bool vsync             = m_properties.vsync;
 
 		// Only init once
 		if (s_windowCount == 0) {
@@ -68,8 +70,9 @@ namespace Inferno {
 		m_context = std::make_shared<Context>(m_window);
 		m_context->initialize();
 
-		// Capture cursor and hide it
+		// Set vsync, viewport
-		// glfwSetInputMode(m_window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
+		setVSync(vsync);
+		RenderCommand::setViewport(0, 0, width, height);
 
 		// Error callback
 		glfwSetErrorCallback([](int error, const char* description) {
@@ -160,27 +163,10 @@ namespace Inferno {
 		});
 	}
 
-	void Window::update()
-	{
-		glfwPollEvents();
-
-		// Lock mouse in window
-		if (Input::isKeyPressed(keyCode("GLFW_KEY_LEFT_SUPER"))) {
-			glfwSetInputMode(m_window, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
-		}
-		else {
-			glfwSetInputMode(m_window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
-		}
-
-	}
-
-	void Window::render()
-	{
-		m_context->render();
-	}
-
 	void Window::destroy()
 	{
+		m_context->destroy();
+
 		glfwDestroyWindow(m_window);
 		s_windowCount--;
 
@@ -189,9 +175,27 @@ namespace Inferno {
 		}
 	}
 
+	void Window::update()
+	{
+		glfwPollEvents();
+
+		// Capture cursor in window and hide it
+		if (!Input::isKeyPressed(keyCode("GLFW_KEY_LEFT_SUPER"))) {
+			glfwSetInputMode(m_window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
+		}
+		else {
+			glfwSetInputMode(m_window, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
+		}
+	}
+
+	void Window::render()
+	{
+		m_context->render();
+	}
+
 // -----------------------------------------
 
-	void Window::setWindowMonitor()
+	void Window::setWindowMonitor() const
 	{
 		GLFWmonitor* monitor   = glfwGetPrimaryMonitor();
 		int xPos               = 0;
@@ -222,8 +226,10 @@ namespace Inferno {
 		glfwSetWindowMonitor(m_window, monitor, xPos, yPos, width, height, refresh);
 	}
 
-	bool Window::shouldClose() const {
+	void Window::setVSync(bool enabled)
-		return glfwWindowShouldClose(m_window);
+	{
+		enabled ? glfwSwapInterval(GL_TRUE) : glfwSwapInterval(GL_FALSE);
+		m_properties.vsync = enabled;
 	}
 
 	void Window::setShouldClose(bool close) const
@@ -231,4 +237,8 @@ namespace Inferno {
 		glfwSetWindowShouldClose(m_window, close ? GL_TRUE : GL_FALSE);
 	}
 
+	bool Window::shouldClose() const {
+		return glfwWindowShouldClose(m_window);
+	}
+
 }

inferno/src/inferno/window.h

@@ -28,20 +28,20 @@ namespace Inferno {
 // -----------------------------------------
 
 		void initialize();
+		void destroy();
 		void update();
 		void render();
-		void destroy();
 
 // -----------------------------------------
 
-		void setWindowMonitor();
+		void setWindowMonitor() const;
-		bool shouldClose() const;
+		void setVSync(bool enabled);
 		void setShouldClose(bool close) const;
 
+		bool shouldClose() const;
 		inline float getAspect() const { return static_cast<float>(m_properties.width) / static_cast<float>(m_properties.height); }
 		inline int getWidth() const { return m_properties.width; }
 		inline int getHeight() const { return m_properties.height; }
-		inline bool isVSync() const { return m_properties.vsync; }
 
 		inline GLFWwindow* getWindow() const { return m_window; }
 		inline const std::shared_ptr<Context>& getContext() const { return m_context; }