Refactor for per window context and more setup to the right places

3 files changed, 21 insertions, 30 deletions

diff --git a/ui/sceneRenderer.cpp b/ui/sceneRenderer.cpp
index 6e75dec..5ef0379 100644
--- a/ui/sceneRenderer.cpp
+++ b/ui/sceneRenderer.cpp
@@ -51,6 +51,9 @@ SceneRenderer::render(std::function<void()> content) const
 {
 	// Geometry pass
 	glEnable(GL_BLEND);
+	glEnable(GL_CULL_FACE);
+	glCullFace(GL_BACK);
+	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 	glEnable(GL_DEPTH_TEST);
 	glBindFramebuffer(GL_FRAMEBUFFER, gBuffer);
 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
diff --git a/ui/window.cpp b/ui/window.cpp
index 82f4d40..0d4c401 100644
--- a/ui/window.cpp
+++ b/ui/window.cpp
@@ -7,35 +7,24 @@
 #include <tuple>

 #include <type_traits>

 

-static SDL_GLContext

-SDL_GL_CreateContextAndGlewInit(SDL_Window * w)

+Window::GlewInitHelper::GlewInitHelper()

 {

-	auto ctx = SDL_GL_CreateContext(w);

-	if (glewInit() != GLEW_OK) {

-		throw std::runtime_error {"Glew failed to initialize!"};

-	}

-	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

-	glEnable(GL_CULL_FACE);

-	glCullFace(GL_BACK);

-	glEnable(GL_BLEND);

-	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

-	return ctx;

+	[[maybe_unused]] static auto init = []() {

+		if (const auto r = glewInit(); r != GLEW_OK) {

+			throw std::runtime_error {reinterpret_cast<const char *>(glewGetErrorString(r))};

+		}

+		else {

+			return r;

+		}

+	}();

 }

 

-using GL_Context = std::remove_pointer_t<SDL_GLContext>;

-using SDL_GLContextPtr = wrapped_ptrt<GL_Context, SDL_GL_CreateContextAndGlewInit, SDL_GL_DeleteContext>;

-

 Window::Window(size_t width, size_t height, const std::string & title) :

 	size {static_cast<int>(width), static_cast<int>(height)}, m_window {title.c_str(),

 																	  static_cast<int>(SDL_WINDOWPOS_CENTERED),

 																	  static_cast<int>(SDL_WINDOWPOS_CENTERED), size.x,

 																	  size.y, static_cast<Uint32>(SDL_WINDOW_OPENGL)},

-	uiShader {[this](auto w) {

-				  // must call glContent before creating the shader

-				  std::ignore = glContext();

-				  return w;

-			  }(width),

-			height}

+	glContext {m_window}, uiShader {width, height}

 {

 }

 

@@ -73,17 +62,10 @@ Window::handleInput(const SDL_Event & e)
 	return false;

 }

 

-SDL_GLContext

-Window::glContext() const

-{

-	static SDL_GLContextPtr m_glContext {m_window};

-	return m_glContext;

-}

-

 void

 Window::refresh() const

 {

-	SDL_GL_MakeCurrent(m_window, glContext());

+	SDL_GL_MakeCurrent(m_window, glContext);

 	clear(0.0F, 0.0F, 0.0F, 1.0F);

 

 	render();

diff --git a/ui/window.h b/ui/window.h
index 0661915..d618976 100644
--- a/ui/window.h
+++ b/ui/window.h
@@ -26,12 +26,18 @@ public:
 	void swapBuffers() const;

 

 protected:

-	[[nodiscard]] SDL_GLContext glContext() const;

 	virtual void render() const;

+	struct GlewInitHelper {

+		GlewInitHelper();

+	};

 

 	using SDL_WindowPtr = wrapped_ptrt<SDL_Window, SDL_CreateWindow, SDL_DestroyWindow>;

+	using GL_Context = std::remove_pointer_t<SDL_GLContext>;

+	using SDL_GLContextPtr = wrapped_ptrt<GL_Context, SDL_GL_CreateContext, SDL_GL_DeleteContext>;

 	const glm::ivec2 size;

 	SDL_WindowPtr m_window;

+	SDL_GLContextPtr glContext;

+	GlewInitHelper glewinithelper;

 	Collection<UIComponent> uiComponents;

 	UIShader uiShader;

 };