Added RenderTarget listeners

Moved Camera matrices assignation to RenderTechnique


Former-commit-id: c8a4ff4b35d40702f047fdfd3fdbc4e4fbbbb1a9

include/Nazara/Graphics/Camera.hpp

@@ -13,10 +13,9 @@
 #include <Nazara/Math/Matrix4.hpp>
 #include <Nazara/Math/Rect.hpp>
 #include <Nazara/Math/Vector3.hpp>
+#include <Nazara/Renderer/RenderTarget.hpp>
 
-class NzRenderTarget;
+class NAZARA_API NzCamera : public NzSceneNode, NzRenderTarget::Listener
-
-class NAZARA_API NzCamera : public NzSceneNode
 {
 	public:
 		NzCamera();
@@ -35,36 +34,47 @@ class NAZARA_API NzCamera : public NzSceneNode
 		const NzMatrix4f& GetProjectionMatrix() const;
 		nzSceneNodeType GetSceneNodeType() const override;
 		const NzRenderTarget* GetTarget() const;
+		const NzRectf& GetTargetRegion() const;
 		const NzMatrix4f& GetViewMatrix() const;
-		const NzRectf& GetViewport() const;
+		const NzRectui& GetViewport() const;
 		float GetZFar() const;
 		float GetZNear() const;
 
 		void SetFOV(float fov);
 		void SetTarget(const NzRenderTarget* renderTarget);
 		void SetTarget(const NzRenderTarget& renderTarget);
-		void SetViewport(const NzRectf& viewport);
+		void SetTargetRegion(const NzRectf& region);
+		void SetViewport(const NzRectui& viewport);
 		void SetZFar(float zFar);
 		void SetZNear(float zNear);
 
 	private:
 		void AddToRenderQueue(NzAbstractRenderQueue* renderQueue) const override;
 		void Invalidate();
-		void Register();
+
-		void Unregister();
+		void OnRenderTargetReleased(const NzRenderTarget* renderTarget, void* userdata) override;
+		bool OnRenderTargetSizeChange(const NzRenderTarget* renderTarget, void* userdata) override;
+
+		void Register() override;
+		void Unregister() override;
+
 		void UpdateFrustum() const;
 		void UpdateProjectionMatrix() const;
 		void UpdateViewMatrix() const;
+		void UpdateViewport() const;
+
 		bool VisibilityTest(const NzFrustumf& frustum) override;
 
 		mutable NzFrustumf m_frustum;
 		mutable NzMatrix4f m_projectionMatrix;
 		mutable NzMatrix4f m_viewMatrix;
-		NzRectf m_viewport;
+		NzRectf m_targetRegion;
+		mutable NzRectui m_viewport;
 		const NzRenderTarget* m_target;
 		mutable bool m_frustumUpdated;
 		mutable bool m_projectionMatrixUpdated;
 		mutable bool m_viewMatrixUpdated;
+		mutable bool m_viewportUpdated;
 		mutable float m_aspectRatio;
 		float m_fov;
 		float m_zFar;

include/Nazara/Renderer/RenderTarget.hpp

@@ -10,6 +10,7 @@
 #include <Nazara/Prerequesites.hpp>
 #include <Nazara/Renderer/Config.hpp>
 #include <Nazara/Renderer/RenderTargetParameters.hpp>
+#include <unordered_map>
 
 class NzRenderer;
 
@@ -18,9 +19,13 @@ class NAZARA_API NzRenderTarget
 	friend class NzRenderer;
 
 	public:
-		NzRenderTarget() = default;
+		class Listener;
+
+		NzRenderTarget();
 		virtual ~NzRenderTarget();
 
+		void AddListener(Listener* listener, void* userdata = nullptr) const;
+
 		virtual unsigned int GetHeight() const = 0;
 		virtual NzRenderTargetParameters GetParameters() const = 0;
 		virtual unsigned int GetWidth() const = 0;
@@ -28,14 +33,34 @@ class NAZARA_API NzRenderTarget
 		bool IsActive() const;
 		virtual bool IsRenderable() const = 0;
 
+		void RemoveListener(Listener* listener) const;
+
 		bool SetActive(bool active);
 
 		// Fonctions OpenGL
 		virtual bool HasContext() const = 0;
 
+		class Listener
+		{
+			public:
+				Listener() = default;
+				~Listener();
+
+				virtual bool OnRenderTargetParametersChange(const NzRenderTarget* renderTarget, void* userdata);
+				virtual void OnRenderTargetReleased(const NzRenderTarget* renderTarget, void* userdata);
+				virtual bool OnRenderTargetSizeChange(const NzRenderTarget* renderTarget, void* userdata);
+		};
+
 	protected:
 		virtual bool Activate() const = 0;
 		virtual void Desactivate() const;
+
+		void NotifyParametersChange();
+		void NotifySizeChange();
+
+	private:
+		mutable std::unordered_map<Listener*, void*> m_listeners;
+		        bool m_listenersLocked;
 };
 
 #endif // NAZARA_RENDERTARGET_HPP

src/Nazara/Graphics/Camera.cpp

@@ -10,9 +10,11 @@
 
 NzCamera::NzCamera() :
 m_viewport(0.f, 0.f, 1.f, 1.f),
+m_target(nullptr),
 m_frustumUpdated(false),
 m_projectionMatrixUpdated(false),
 m_viewMatrixUpdated(false),
+m_viewportUpdated(false),
 m_aspectRatio(0.f),
 m_fov(70.f),
 m_zFar(100.f),
@@ -20,50 +22,27 @@ m_zNear(1.f)
 {
 }
 
-NzCamera::~NzCamera() = default;
+NzCamera::~NzCamera()
+{
+	if (m_target)
+		m_target->RemoveListener(this);
+}
 
 void NzCamera::Activate()
 {
 	#ifdef NAZARA_GRAPHICS_SAFE
 	if (!m_target)
 	{
-		NazaraError("No render target !");
+		NazaraError("Camera has no render target");
 		return;
 	}
 	#endif
 
+	if (!m_viewportUpdated)
+		UpdateViewport();
+
 	NzRenderer::SetTarget(m_target);
-
+	NzRenderer::SetViewport(m_viewport);
-	unsigned int width = m_target->GetWidth();
-	unsigned int height = std::max(m_target->GetHeight(), 1U);
-
-	float vWidth = width * m_viewport.width;
-	float vHeight = height * m_viewport.height;
-
-	NzRectui viewport;
-	viewport.x = width * m_viewport.x;
-	viewport.y = height * m_viewport.x;
-	viewport.width = vWidth;
-	viewport.height = height * m_viewport.height;
-	NzRenderer::SetViewport(viewport);
-
-	float aspectRatio = vWidth/vHeight;
-
-	if (!NzNumberEquals(m_aspectRatio, aspectRatio))
-	{
-		m_aspectRatio = aspectRatio;
-		m_frustumUpdated = false;
-		m_projectionMatrixUpdated = false;
-	}
-
-	if (!m_projectionMatrixUpdated)
-		UpdateProjectionMatrix();
-
-	if (!m_viewMatrixUpdated)
-		UpdateViewMatrix();
-
-	NzRenderer::SetMatrix(nzMatrixType_Projection, m_projectionMatrix);
-	NzRenderer::SetMatrix(nzMatrixType_View, m_viewMatrix);
 
 	if (m_scene)
 		m_scene->SetActiveCamera(this);
@@ -130,6 +109,11 @@ const NzRenderTarget* NzCamera::GetTarget() const
 	return m_target;
 }
 
+const NzRectf& NzCamera::GetTargetRegion() const
+{
+	return m_targetRegion;
+}
+
 const NzMatrix4f& NzCamera::GetViewMatrix() const
 {
 	if (!m_viewMatrixUpdated)
@@ -138,8 +122,19 @@ const NzMatrix4f& NzCamera::GetViewMatrix() const
 	return m_viewMatrix;
 }
 
-const NzRectf& NzCamera::GetViewport() const
+const NzRectui& NzCamera::GetViewport() const
 {
+	#if NAZARA_GRAPHICS_SAFE
+	if (!m_target)
+	{
+		NazaraError("Camera has no render target");
+		return m_viewport;
+	}
+	#endif
+
+	if (!m_viewportUpdated)
+		UpdateViewport();
+
 	return m_viewport;
 }
 
@@ -158,12 +153,18 @@ void NzCamera::SetFOV(float fov)
 	m_fov = fov;
 
 	m_frustumUpdated = false;
-	m_projectionMatrixUpdated= false;
+	m_projectionMatrixUpdated = false;
 }
 
 void NzCamera::SetTarget(const NzRenderTarget* renderTarget)
 {
+	NazaraError(NzString::Pointer(m_target));
+	if (m_target)
+		m_target->RemoveListener(this);
+
 	m_target = renderTarget;
+	if (m_target)
+		m_target->AddListener(this);
 }
 
 void NzCamera::SetTarget(const NzRenderTarget& renderTarget)
@@ -171,9 +172,27 @@ void NzCamera::SetTarget(const NzRenderTarget& renderTarget)
 	SetTarget(&renderTarget);
 }
 
-void NzCamera::SetViewport(const NzRectf& viewport)
+void NzCamera::SetTargetRegion(const NzRectf& region)
 {
-	m_viewport = viewport;
+	m_targetRegion = region;
+	m_viewportUpdated = false;
+}
+
+void NzCamera::SetViewport(const NzRectui& viewport)
+{
+	#if NAZARA_GRAPHICS_SAFE
+	if (!m_target)
+	{
+		NazaraError("Camera has no render target");
+		return;
+	}
+	#endif
+
+	// On calcule la région nécessaire pour produire ce viewport avec la taille actuelle de la cible
+	float invWidth = 1.f/m_target->GetWidth();
+	float invHeight = 1.f/m_target->GetHeight();
+
+	SetTargetRegion(NzRectf(invWidth * viewport.x, invHeight * viewport.y, invWidth * viewport.width, invHeight * viewport.height));
 }
 
 void NzCamera::SetZFar(float zFar)
@@ -196,17 +215,40 @@ void NzCamera::AddToRenderQueue(NzAbstractRenderQueue* renderQueue) const
 {
 	NazaraUnused(renderQueue);
 
-	NazaraInternalError("SceneNode::AddToRenderQueue() called on SceneRoot");
+	NazaraInternalError("SceneNode::AddToRenderQueue() called on Camera");
 }
 
 void NzCamera::Invalidate()
 {
 	NzSceneNode::Invalidate();
 
+	// Le frustum et la view matrix dépendent des paramètres du node, invalidons-les
 	m_frustumUpdated = false;
 	m_viewMatrixUpdated = false;
 }
 
+void NzCamera::OnRenderTargetReleased(const NzRenderTarget* renderTarget, void* userdata)
+{
+	NazaraUnused(userdata);
+
+	if (renderTarget == m_target)
+		m_target = nullptr;
+	else
+		NazaraInternalError("Not listening to " + NzString::Pointer(renderTarget));
+}
+
+bool NzCamera::OnRenderTargetSizeChange(const NzRenderTarget* renderTarget, void* userdata)
+{
+	NazaraUnused(userdata);
+
+	if (renderTarget == m_target)
+		m_viewportUpdated = false;
+	else
+		NazaraInternalError("Not listening to " + NzString::Pointer(renderTarget));
+
+	return true;
+}
+
 void NzCamera::Register()
 {
 }
@@ -242,6 +284,29 @@ void NzCamera::UpdateViewMatrix() const
 	m_viewMatrixUpdated = true;
 }
 
+void NzCamera::UpdateViewport() const
+{
+	unsigned int width = m_target->GetWidth();
+	unsigned int height = std::max(m_target->GetHeight(), 1U);
+
+	float vWidth = width * m_viewport.width;
+	float vHeight = height * m_viewport.height;
+	float aspectRatio = vWidth/vHeight;
+
+	if (!NzNumberEquals(m_aspectRatio, aspectRatio, 0.001f))
+	{
+		m_aspectRatio = aspectRatio;
+		m_frustumUpdated = false;
+		m_projectionMatrixUpdated = false;
+	}
+
+	m_viewport.x = width * m_targetRegion.x;
+	m_viewport.y = height * m_targetRegion.y;
+	m_viewport.width = vWidth;
+	m_viewport.height = vHeight;
+	m_viewportUpdated = true;
+}
+
 bool NzCamera::VisibilityTest(const NzFrustumf& frustum)
 {
 	NazaraUnused(frustum);

src/Nazara/Graphics/ForwardRenderTechnique.cpp

@@ -140,6 +140,9 @@ void NzForwardRenderTechnique::Draw(const NzScene* scene)
 	const NzCamera* camera = scene->GetActiveCamera();
 	const NzShaderProgram* lastProgram = nullptr;
 
+	NzRenderer::SetMatrix(nzMatrixType_Projection, camera->GetProjectionMatrix());
+	NzRenderer::SetMatrix(nzMatrixType_View, camera->GetViewMatrix());
+
 	// Rendu des modèles opaques
 	for (auto& matIt : m_renderQueue.opaqueModels)
 	{

src/Nazara/Graphics/SkyboxBackground.cpp

@@ -198,13 +198,14 @@ void NzSkyboxBackground::Draw(const NzScene* scene) const
 
 	s_program->SendInteger(s_skyboxLocation, 0);
 
-	const NzMatrix4f& viewMatrix = NzRenderer::GetMatrix(nzMatrixType_View);
+	NzCamera* camera = scene->GetActiveCamera();
-	NzMatrix4f skyboxMatrix(viewMatrix);
+
+	NzMatrix4f skyboxMatrix(camera->GetViewMatrix());
 	skyboxMatrix.SetTranslation(NzVector3f::Zero());
 
 	NzRenderer::SetIndexBuffer(m_indexBuffer);
 	NzRenderer::SetMatrix(nzMatrixType_View, skyboxMatrix);
-	NzRenderer::SetMatrix(nzMatrixType_World, NzMatrix4f::Scale(NzVector3f(scene->GetActiveCamera()->GetZNear())));
+	NzRenderer::SetMatrix(nzMatrixType_World, NzMatrix4f::Scale(NzVector3f(camera->GetZNear())));
 	NzRenderer::SetRenderStates(states);
 	NzRenderer::SetShaderProgram(s_program);
 	NzRenderer::SetTexture(0, m_texture);
@@ -212,8 +213,6 @@ void NzSkyboxBackground::Draw(const NzScene* scene) const
 	NzRenderer::SetVertexBuffer(m_vertexBuffer);
 
 	NzRenderer::DrawIndexedPrimitives(nzPrimitiveMode_TriangleList, 0, 36);
-
-	NzRenderer::SetMatrix(nzMatrixType_View, viewMatrix);
 }
 
 nzBackgroundType NzSkyboxBackground::GetBackgroundType() const

src/Nazara/Renderer/RenderTarget.cpp

@@ -6,13 +6,37 @@
 #include <Nazara/Renderer/Renderer.hpp>
 #include <Nazara/Renderer/Debug.hpp>
 
-NzRenderTarget::~NzRenderTarget() = default;
+NzRenderTarget::NzRenderTarget() :
+m_listenersLocked(false)
+{
+}
+
+NzRenderTarget::~NzRenderTarget()
+{
+	m_listenersLocked = true;
+	for (auto& pair : m_listeners)
+		pair.first->OnRenderTargetReleased(this, pair.second);
+}
+
+void NzRenderTarget::AddListener(Listener* listener, void* userdata) const
+{
+	NazaraError("What the");
+	if (!m_listenersLocked)
+		m_listeners.insert(std::make_pair(listener, userdata));
+	NazaraError("What the");
+}
 
 bool NzRenderTarget::IsActive() const
 {
 	return NzRenderer::GetTarget() == this;
 }
 
+void NzRenderTarget::RemoveListener(Listener* listener) const
+{
+	if (!m_listenersLocked)
+		m_listeners.erase(listener);
+}
+
 bool NzRenderTarget::SetActive(bool active)
 {
 	if (active)
@@ -27,3 +51,59 @@ void NzRenderTarget::Desactivate() const
 {
 	// Seuls les target sans contextes (ex: NzRenderTexture) nécessitent une désactivation
 }
+
+void NzRenderTarget::NotifyParametersChange()
+{
+	m_listenersLocked = true;
+
+	auto it = m_listeners.begin();
+	while (it != m_listeners.end())
+	{
+		if (!it->first->OnRenderTargetParametersChange(this, it->second))
+			m_listeners.erase(it++);
+		else
+			++it;
+	}
+
+	m_listenersLocked = false;
+}
+
+void NzRenderTarget::NotifySizeChange()
+{
+	m_listenersLocked = true;
+
+	auto it = m_listeners.begin();
+	while (it != m_listeners.end())
+	{
+		if (!it->first->OnRenderTargetSizeChange(this, it->second))
+			m_listeners.erase(it++);
+		else
+			++it;
+	}
+
+	m_listenersLocked = false;
+}
+
+NzRenderTarget::Listener::~Listener() = default;
+
+bool NzRenderTarget::Listener::OnRenderTargetParametersChange(const NzRenderTarget* renderTarget, void* userdata)
+{
+	NazaraUnused(renderTarget);
+	NazaraUnused(userdata);
+
+	return true;
+}
+
+void NzRenderTarget::Listener::OnRenderTargetReleased(const NzRenderTarget* renderTarget, void* userdata)
+{
+	NazaraUnused(renderTarget);
+	NazaraUnused(userdata);
+}
+
+bool NzRenderTarget::Listener::OnRenderTargetSizeChange(const NzRenderTarget* renderTarget, void* userdata)
+{
+	NazaraUnused(renderTarget);
+	NazaraUnused(userdata);
+
+	return true;
+}

src/Nazara/Renderer/RenderTexture.cpp

@@ -317,6 +317,9 @@ bool NzRenderTexture::Create(unsigned int width, unsigned int height, bool lock)
 		return false;
 	}
 
+	NotifyParametersChange();
+	NotifySizeChange();
+
 	return true;
 }
 
@@ -435,6 +438,7 @@ NzRenderTargetParameters NzRenderTexture::GetParameters() const
 	}
 	#endif
 
+	///TODO
 	return NzRenderTargetParameters();
 }
 

src/Nazara/Renderer/RenderWindow.cpp

@@ -294,6 +294,9 @@ bool NzRenderWindow::OnWindowCreated()
 	if (!SetActive(true)) // Les fenêtres s'activent à la création
 		NazaraWarning("Failed to activate window");
 
+	NotifyParametersChange();
+	NotifySizeChange();
+
 	m_clock.Restart();
 
     return true;