From 1d59a53cd4af1b72b418b921cae0714264f5323b Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <coelckers@users.noreply.github.com>
Date: Sun, 18 Mar 2018 12:54:14 +0100
Subject: [PATCH] - added worldtexture.cpp

---
 src/textures/worldtexture.cpp | 133 ++++++++++++++++++++++++++++++++++
 1 file changed, 133 insertions(+)
 create mode 100644 src/textures/worldtexture.cpp

diff --git a/src/textures/worldtexture.cpp b/src/textures/worldtexture.cpp
new file mode 100644
index 0000000000..0370bf3e81
--- /dev/null
+++ b/src/textures/worldtexture.cpp
@@ -0,0 +1,133 @@
+/*
+** worldtexture.cpp
+** Intermediate class for some common code for several classes
+**
+**---------------------------------------------------------------------------
+** Copyright 2018 Christoph Oelckers
+** All rights reserved.
+**
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions
+** are met:
+**
+** 1. Redistributions of source code must retain the above copyright
+**    notice, this list of conditions and the following disclaimer.
+** 2. Redistributions in binary form must reproduce the above copyright
+**    notice, this list of conditions and the following disclaimer in the
+**    documentation and/or other materials provided with the distribution.
+** 3. The name of the author may not be used to endorse or promote products
+**    derived from this software without specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+**---------------------------------------------------------------------------
+**
+**
+*/
+
+#include "textures.h"
+
+
+//==========================================================================
+//
+//
+//
+//==========================================================================
+
+FWorldTexture::FWorldTexture(const char *name, int lumpnum)
+ : FTexture(name, lumpnum)
+{
+}
+
+//==========================================================================
+//
+//
+//
+//==========================================================================
+
+FWorldTexture::~FWorldTexture()
+{
+	Unload();
+	for(int i = 0; i < 2; i++)
+	{
+		if (Spandata[i] != nullptr)
+		{
+			FreeSpans (Spandata[i]);
+			Spandata[i] = nullptr;
+		}
+	}
+}
+
+//==========================================================================
+//
+//
+//
+//==========================================================================
+
+void FWorldTexture::Unload ()
+{
+	for(int i = 0; i < 2; i++)
+	{
+		if (!(PixelsAreStatic & (1 << i)))
+		{
+			delete[] Pixeldata[i];
+		}
+		Pixeldata[i] = nullptr;
+	}
+	FTexture::Unload();
+}
+
+//==========================================================================
+//
+//
+//
+//==========================================================================
+
+const uint8_t *FWorldTexture::GetColumn (unsigned int column, const Span **spans_out)
+{
+	GetPixels();
+	if ((unsigned)column >= (unsigned)Width)
+	{
+		if (WidthMask + 1 == Width)
+		{
+			column &= WidthMask;
+		}
+		else
+		{
+			column %= Width;
+		}
+	}
+	if (spans_out != nullptr)
+	{
+		if (Spandata[0] == nullptr)
+		{
+			Spandata[0] = CreateSpans (Pixeldata[0]);
+		}
+		*spans_out = Spandata[0][column];
+	}
+	return Pixeldata[0] + column*Height;
+}
+
+//==========================================================================
+//
+//
+//
+//==========================================================================
+
+const uint8_t *FWorldTexture::GetPixels ()
+{
+	if (Pixeldata[0] == nullptr)
+	{
+		Pixeldata[0] = MakeTexture (LegacyRenderStyles[STYLE_Normal]);
+	}
+	return Pixeldata[0];
+}
+