From 0407e8152b2c39d878c2602786e93e16bf787215 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20Vondru=C5=A1?= <mosra@centrum.cz>
Date: Thu, 1 Dec 2011 23:39:11 +0100
Subject: [PATCH] New class for Cube map textures.

---
 src/CubeMapTexture.h | 124 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 src/CubeMapTexture.h

diff --git a/src/CubeMapTexture.h b/src/CubeMapTexture.h
new file mode 100644
index 000000000..a68c1d974
--- /dev/null
+++ b/src/CubeMapTexture.h
@@ -0,0 +1,124 @@
+#ifndef Magnum_CubeMapTexture_h
+#define Magnum_CubeMapTexture_h
+/*
+    Copyright © 2010, 2011 Vladimír Vondruš <mosra@centrum.cz>
+
+    This file is part of Magnum.
+
+    Magnum is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License version 3
+    only, as published by the Free Software Foundation.
+
+    Magnum is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+    GNU Lesser General Public License version 3 for more details.
+*/
+
+/** @file
+ * @brief Cube map texture
+ */
+
+#include "Texture.h"
+
+namespace Magnum {
+
+/**
+@brief Cube map texture
+
+%Texture used mainly for environemnt maps, consisting of 6 square textures
+generating 6 faces of the cube as following. Note that all images must be
+turned upside down (+Y is top):
+<pre>
+          +----+
+          | -Y |
++----+----+----+----+
+| -Z | -X | +Z | +X |
++----+----+----+----+
+          | +Y |
+          +----+
+</pre>
+When using cube map texture in the shader, use @c samplerCube. Unlike normal
+textures, coordinates for cube map textures is signed three-part vector from
+the center of the cube, which intersects one of the six sides of the cube map.
+
+See Texture documentation for more information about usage.
+*/
+class CubeMapTexture: public Texture2D {
+    public:
+        /**
+         * @brief Constructor
+         *
+         * Creates texture with target @c GL_TEXTURE_CUBE_MAP.
+         */
+        inline CubeMapTexture(): Texture2D(GL_TEXTURE_CUBE_MAP) {}
+
+    protected:
+        /** @brief Deleted. Use setDataPositiveX() and others instead. */
+        template<class T> inline void setData(GLint mipLevel, int internalFormat, const Math::Vector<GLsizei, Dimensions>& _dimensions, ColorFormat colorFormat, const T* data) = delete;
+
+        /**
+         * @brief Set texture data for positive X
+         *
+         * @copydetails Texture::setData()
+         */
+        template<class T> inline void setDataPositiveX(GLint mipLevel, int internalFormat, const Math::Vector<GLsizei, Dimensions>& _dimensions, ColorFormat colorFormat, const T* data) {
+            setData(GL_TEXTURE_CUBE_MAP_POSITIVE_X, mipLevel, internalFormat, _dimensions, colorFormat, data);
+        }
+
+        /**
+         * @brief Set texture data for negative X
+         *
+         * @copydetails Texture::setData()
+         */
+        template<class T> inline void setDataNegativeX(GLint mipLevel, int internalFormat, const Math::Vector<GLsizei, Dimensions>& _dimensions, ColorFormat colorFormat, const T* data) {
+            setData(GL_TEXTURE_CUBE_MAP_NEGATIVE_X, mipLevel, internalFormat, _dimensions, colorFormat, data);
+        }
+
+        /**
+         * @brief Set texture data for positive Y
+         *
+         * @copydetails Texture::setData()
+         */
+        template<class T> inline void setDataPositiveY(GLint mipLevel, int internalFormat, const Math::Vector<GLsizei, Dimensions>& _dimensions, ColorFormat colorFormat, const T* data) {
+            setData(GL_TEXTURE_CUBE_MAP_POSITIVE_Y, mipLevel, internalFormat, _dimensions, colorFormat, data);
+        }
+
+        /**
+         * @brief Set texture data for negative Y
+         *
+         * @copydetails Texture::setData()
+         */
+        template<class T> inline void setDataNegativeY(GLint mipLevel, int internalFormat, const Math::Vector<GLsizei, Dimensions>& _dimensions, ColorFormat colorFormat, const T* data) {
+            setData(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, mipLevel, internalFormat, _dimensions, colorFormat, data);
+        }
+
+        /**
+         * @brief Set texture data for positive Z
+         *
+         * @copydetails Texture::setData()
+         */
+        template<class T> inline void setDataPositiveZ(GLint mipLevel, int internalFormat, const Math::Vector<GLsizei, Dimensions>& _dimensions, ColorFormat colorFormat, const T* data) {
+            setData(GL_TEXTURE_CUBE_MAP_POSITIVE_Z, mipLevel, internalFormat, _dimensions, colorFormat, data);
+        }
+
+        /**
+         * @brief Set texture data for negative Z
+         *
+         * @copydetails Texture::setData()
+         */
+        template<class T> inline void setDataNegativeZ(GLint mipLevel, int internalFormat, const Math::Vector<GLsizei, Dimensions>& _dimensions, ColorFormat colorFormat, const T* data) {
+            setData(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, mipLevel, internalFormat, _dimensions, colorFormat, data);
+        }
+
+    private:
+        template<class T> void setData(GLenum target, GLint mipLevel, int internalFormat, const Math::Vector<GLsizei, Dimensions>& _dimensions, ColorFormat colorFormat, const T* data) {
+            bind();
+            DataHelper<Dimensions>::template set<typename TypeTraits<T>::TextureType>(target, mipLevel, internalFormat, _dimensions, colorFormat, data);
+            unbind();
+        }
+};
+
+}
+
+#endif