Added OpenGL::Delete[FrameBuffer|VertexArray]

Also renamed OpenGL::OnContextChange to OnContextChanged (since it
happens after the context change)
Also improved RenderTexture implementation


Former-commit-id: d845b1405294dd3aa134d392585069bbb28a77a3

include/Nazara/Renderer/OpenGL.hpp

@@ -86,9 +86,11 @@ class NAZARA_API NzOpenGL
 		static void BindViewport(const NzRecti& viewport);
 
 		static void DeleteBuffer(nzBufferType type, GLuint id);
+		static void DeleteFrameBuffer(const NzContext* context, GLuint id);
 		static void DeleteProgram(GLuint id);
 		static void DeleteSampler(GLuint id);
 		static void DeleteTexture(GLuint id);
+		static void DeleteVertexArray(const NzContext* context, GLuint id);
 
 		static GLuint GetCurrentBuffer(nzBufferType type);
 		static GLuint GetCurrentProgram();
@@ -149,7 +151,7 @@ class NAZARA_API NzOpenGL
 		static GLenum TextureTargetProxy[nzImageType_Max+1];
 
 	private:
-		static void OnContextChange(const NzContext* newContext);
+		static void OnContextChanged(const NzContext* newContext);
 		static void OnContextDestruction(const NzContext* context);
 };
 

src/Nazara/Renderer/Context.cpp

@@ -248,7 +248,7 @@ bool NzContext::SetActive(bool active) const
 		currentContext = nullptr;
 	}
 
-	NzOpenGL::OnContextChange(currentContext);
+	NzOpenGL::OnContextChanged(currentContext);
 
 	return true;
 }

src/Nazara/Renderer/OpenGL.cpp

@@ -63,8 +63,15 @@ namespace
 		#endif
 	}
 
+	enum GarbageResourceType
+	{
+		GarbageResourceType_FrameBuffer,
+		GarbageResourceType_VertexArray
+	};
+
 	struct ContextStates
 	{
+		std::vector<std::pair<GarbageResourceType, GLuint>> garbage; // Les ressources à supprimer dès que possible
 		GLuint buffersBinding[nzBufferType_Max+1] = {0};
 		GLuint currentProgram = 0;
 		GLuint samplers[32] = {0}; // 32 est pour l'instant la plus haute limite (GL_TEXTURE31)
@@ -496,6 +503,15 @@ void NzOpenGL::DeleteBuffer(nzBufferType type, GLuint id)
 		s_contextStates->buffersBinding[type] = 0;
 }
 
+void NzOpenGL::DeleteFrameBuffer(const NzContext* context, GLuint id)
+{
+	// Si le contexte est actif, ne nous privons pas
+	if (NzContext::GetCurrent() == context)
+		glDeleteFramebuffers(1, &id);
+	else
+		s_contexts[context].garbage.emplace_back(GarbageResourceType_FrameBuffer, id);
+}
+
 void NzOpenGL::DeleteProgram(GLuint id)
 {
 	#ifdef NAZARA_DEBUG
@@ -555,6 +571,15 @@ void NzOpenGL::DeleteTexture(GLuint id)
 	}
 }
 
+void NzOpenGL::DeleteVertexArray(const NzContext* context, GLuint id)
+{
+	// Si le contexte est actif, ne nous privons pas
+	if (NzContext::GetCurrent() == context)
+		glDeleteFramebuffers(1, &id);
+	else
+		s_contexts[context].garbage.emplace_back(GarbageResourceType_VertexArray, id);
+}
+
 GLuint NzOpenGL::GetCurrentBuffer(nzBufferType type)
 {
 	#ifdef NAZARA_DEBUG
@@ -1778,9 +1803,27 @@ void NzOpenGL::Uninitialize()
 	}
 }
 
-void NzOpenGL::OnContextChange(const NzContext* newContext)
+void NzOpenGL::OnContextChanged(const NzContext* newContext)
 {
 	s_contextStates = (newContext) ? &s_contexts[newContext] : nullptr;
+	if (s_contextStates)
+	{
+		// On supprime les éventuelles ressources mortes-vivantes (Qui ne peuvent être libérées que dans notre contexte)
+		for (std::pair<GarbageResourceType, GLuint>& pair : s_contextStates->garbage)
+		{
+			switch (pair.first)
+			{
+				case GarbageResourceType_FrameBuffer:
+					glDeleteFramebuffers(1, &pair.second);
+					break;
+
+				case GarbageResourceType_VertexArray:
+					glDeleteVertexArrays(1, &pair.second);
+					break;
+			}
+		}
+		s_contextStates->garbage.clear();
+	}
 }
 
 void NzOpenGL::OnContextDestruction(const NzContext* context)

src/Nazara/Renderer/RenderTexture.cpp

@@ -3,6 +3,7 @@
 // For conditions of distribution and use, see copyright notice in Config.hpp
 
 #include <Nazara/Renderer/RenderTexture.hpp>
+#include <Nazara/Core/CallOnExit.hpp>
 #include <Nazara/Core/Error.hpp>
 #include <Nazara/Renderer/Context.hpp>
 #include <Nazara/Renderer/OpenGL.hpp>
@@ -325,31 +326,36 @@ bool NzRenderTexture::Create(bool lock)
 	}
 	#endif
 
-	NzRenderTextureImpl* impl = new NzRenderTextureImpl;
-
-	impl->context = NzContext::GetCurrent();
-	impl->context->AddResourceListener(this);
+	std::unique_ptr<NzRenderTextureImpl> impl(new NzRenderTextureImpl);
 
 	impl->fbo = 0;
 	glGenFramebuffers(1, &impl->fbo);
 
 	if (!impl->fbo)
 	{
-		delete impl;
-
 		NazaraError("Failed to create framebuffer");
 		return false;
 	}
 
-	m_impl = impl;
+	m_impl = impl.release();
+	m_impl->context = NzContext::GetCurrent();
+	m_impl->context->AddResourceListener(this);
 
-	if (lock && !Lock())
+	if (lock)
 	{
-		delete impl;
-		m_impl = nullptr;
+		// En cas d'exception, la ressource sera quand même libérée
+		NzCallOnExit onExit([this] ()
+		{
+			Destroy();
+		});
 
-		NazaraError("Failed to lock render texture");
-		return false;
+		if (!Lock())
+		{
+			NazaraError("Failed to lock render texture");
+			return false;
+		}
+
+		onExit.Reset();
 	}
 
 	NotifyParametersChange();
@@ -365,15 +371,6 @@ void NzRenderTexture::Destroy()
 		if (IsActive())
 			NzRenderer::SetTarget(nullptr);
 
-		bool canFreeFBO = true;
-		#if NAZARA_RENDERER_SAFE
-		if (NzContext::GetCurrent() != m_impl->context)
-		{
-			NazaraWarning("RenderTexture should be destroyed by it's creation context, this will cause leaks");
-			canFreeFBO = false;
-		}
-		#endif
-
 		m_impl->context->RemoveResourceListener(this);
 
 		for (const Attachment& attachment : m_impl->attachments)
@@ -387,10 +384,11 @@ void NzRenderTexture::Destroy()
 			}
 		}
 
-		if (canFreeFBO)
-			glDeleteFramebuffers(1, &m_impl->fbo);
+		// Le FBO devant être supprimé dans son contexte d'origine, nous déléguons sa suppression à la classe OpenGL
+		// Celle-ci va libérer le FBO dès que possible (la prochaine fois que son contexte d'origine sera actif)
+		NzOpenGL::DeleteFrameBuffer(m_impl->context, m_impl->fbo);
 
-		delete m_impl;
+		delete m_impl; // Enlève également une références sur les Texture/RenderBuffer
 		m_impl = nullptr;
 	}
 }