From a9dfb016ca16636e954e11e95aa5a16986661a86 Mon Sep 17 00:00:00 2001
From: Ykkrosh <philip@wildfiregames.com>
Date: Wed, 31 May 2006 16:42:50 +0000
Subject: [PATCH] # Fixed self-shadowing in Atlas (The ShadowMap object was
 being destroyed/recreated, and thus forgot that it had been told to use depth
 textures)

This was SVN commit r3916.
---
 source/renderer/Renderer.cpp  |  3 +--
 source/renderer/ShadowMap.cpp | 18 +++++++++++++++++-
 source/renderer/ShadowMap.h   |  7 +++++++
 3 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/source/renderer/Renderer.cpp b/source/renderer/Renderer.cpp
index b82586ff2a..4d5dd29d08 100644
--- a/source/renderer/Renderer.cpp
+++ b/source/renderer/Renderer.cpp
@@ -530,8 +530,7 @@ bool CRenderer::Open(int width, int height, int depth)
 void CRenderer::Resize(int width,int height)
 {
 	// need to recreate the shadow map object to resize the shadow texture
-	delete m->shadow;
-	m->shadow = new ShadowMap;
+	m->shadow->RecreateTexture();
 
 	m_Width = width;
 	m_Height = height;
diff --git a/source/renderer/ShadowMap.cpp b/source/renderer/ShadowMap.cpp
index aca822c63f..eb1564ede9 100644
--- a/source/renderer/ShadowMap.cpp
+++ b/source/renderer/ShadowMap.cpp
@@ -96,6 +96,22 @@ ShadowMap::~ShadowMap()
 	delete m;
 }
 
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Force the texture/buffer/etc to be recreated, particularly when the renderer's
+// size has changed
+void ShadowMap::RecreateTexture()
+{
+	if (m->Texture)
+		glDeleteTextures(1, &m->Texture);
+	if (m->Framebuffer)
+		pglDeleteFramebuffersEXT(1, &m->Framebuffer);
+
+	m->Texture = 0;
+	m->Framebuffer = 0;
+
+	// (Texture will be constructed in next SetupFrame)
+}
+
 //////////////////////////////////////////////////////////////////////////////
 // SetupFrame: camera and light direction for this frame
 void ShadowMap::SetupFrame(const CCamera& camera, const CVector3D& lightdir)
@@ -234,7 +250,7 @@ void ShadowMapInternals::CalcShadowMatrices()
 
 
 
-///////////////////////////////////////////////////////////////////////////////////////////////////
+//////////////////////////////////////////////////////////////////////////
 // Create the shadow map
 void ShadowMapInternals::CreateTexture()
 {
diff --git a/source/renderer/ShadowMap.h b/source/renderer/ShadowMap.h
index 7df8a77f6b..f83e1db056 100644
--- a/source/renderer/ShadowMap.h
+++ b/source/renderer/ShadowMap.h
@@ -35,6 +35,13 @@ public:
 	ShadowMap();
 	~ShadowMap();
 
+	/**
+	 * RecreateTexture: Destroy the current shadow texture and force creation of
+	 * a new one. Useful when the renderer's size has changed and the texture
+	 * should be resized too.
+	 */
+	void RecreateTexture();
+
 	/**
 	 * GetUseDepthTexture: Return whether rendering uses a depth texture (instead of
 	 * a luminance texture).