New class ImageWrapper.

src/BufferedImage.h

@@ -34,7 +34,8 @@ namespace Magnum {
 @brief %Buffered image
 
 Class for storing image data in GPU memory. Can be replaced with Image, which
-stores image data in client memory, or for example with Trade::ImageData.
+stores image data in client memory, ImageWrapper, or for example with
+Trade::ImageData.
 @requires_gl
 */
 template<size_t imageDimensions> class BufferedImage: public AbstractImage {

src/Image.h

@@ -32,8 +32,8 @@ namespace Magnum {
 @brief %Image
 
 Class for storing image data on client memory. Can be replaced with
-BufferedImage, which stores image data in GPU memory, or for example with
-Trade::ImageData.
+ImageWrapper, BufferedImage, which stores image data in GPU memory, or for
+example with Trade::ImageData.
 */
 template<size_t imageDimensions> class Image: public AbstractImage {
     public:

src/ImageWrapper.h

@@ -0,0 +1,120 @@
+#ifndef Magnum_ImageWrapper_h
+#define Magnum_ImageWrapper_h
+/*
+    Copyright © 2010, 2011, 2012 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 Class Magnum::ImageWrapper
+ */
+
+#include "AbstractImage.h"
+#include "TypeTraits.h"
+
+namespace Magnum {
+
+/** @addtogroup textures
+ * @{
+ */
+
+/**
+@brief %Image wrapper
+
+Adds information about dimensions, color components and component type to some
+data in memory.
+
+Unlike Image, this class doesn't delete the data on destruction, so it is
+targeted for wrapping data which are either stored in stack/constant memory
+(and shouldn't be deleted) or they are managed by someone else and have the
+same properties for each frame, such as video stream. Thus it is not possible
+to change image properties, only data pointer.
+
+See also Image, BufferedImage and Trade::ImageData.
+*/
+template<size_t imageDimensions> class ImageWrapper: public AbstractImage {
+    public:
+        const static size_t Dimensions = imageDimensions;   /**< @brief Image dimension count */
+
+        /**
+         * @brief Constructor
+         * @param dimensions        %Image dimensions
+         * @param components        Color components. Data type is detected
+         *      from passed data array.
+         * @param data              %Image data with proper size
+         *
+         * Note that the image data are not copied on construction, but they
+         * are deleted on class destruction.
+         */
+        template<class T> inline ImageWrapper(const Math::Vector<Dimensions, GLsizei>& dimensions, Components components, T* data): AbstractImage(components, TypeTraits<T>::imageType()), _dimensions(dimensions), _data(data) {}
+
+        /**
+         * @brief Constructor
+         * @param dimensions        %Image dimensions
+         * @param components        Color components
+         * @param type              Data type
+         * @param data              %Image data
+         *
+         * Note that the image data are not copied on construction, but they
+         * are deleted on class destruction.
+         */
+        inline ImageWrapper(const Math::Vector<Dimensions, GLsizei>& dimensions, Components components, ComponentType type, GLvoid* data): AbstractImage(components, type), _dimensions(dimensions), _data(reinterpret_cast<char*>(data)) {}
+
+        /**
+         * @brief Constructor
+         * @param dimensions        %Image dimensions
+         * @param components        Color components
+         * @param type              Data type
+         *
+         * Dimensions and data pointer are set to zero, call setData() to fill
+         * the image with data.
+         */
+        inline ImageWrapper(const Math::Vector<Dimensions, GLsizei>& dimensions, Components components, ComponentType type): AbstractImage(components, type), _dimensions(dimensions), _data(nullptr) {}
+
+        /** @brief %Image dimensions */
+        inline constexpr const Math::Vector<Dimensions, GLsizei>& dimensions() const { return _dimensions; }
+
+        /** @brief Pointer to raw data */
+        inline constexpr const void* data() const { return _data; }
+
+        /**
+         * @brief Set image data
+         * @param data              %Image data
+         *
+         * Dimensions, color compnents and data type remains the same as
+         * passed in constructor. The data are not copied nor deleted on
+         * destruction.
+         */
+        void setData(GLvoid* data) {
+            _data = reinterpret_cast<char*>(data);
+        }
+
+    protected:
+        Math::Vector<Dimensions, GLsizei> _dimensions;  /**< @brief %Image dimensions */
+        char* _data;                                    /**< @brief %Image data */
+};
+
+/** @brief One-dimensional image wrapper */
+typedef ImageWrapper<1> ImageWrapper1D;
+
+/** @brief Two-dimensional image wrapper */
+typedef ImageWrapper<2> ImageWrapper2D;
+
+/** @brief Three-dimensional image wrapper */
+typedef ImageWrapper<3> ImageWrapper3D;
+
+/*@}*/
+
+}
+
+#endif