Move love.graphics Image wrapper code out of the opengl subfolder

--HG--
branch : minor

src/modules/graphics/Image.h

@@ -0,0 +1,88 @@
+/**
+ * Copyright (c) 2006-2017 LOVE Development Team
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty.  In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software. If you use this software
+ *    in a product, an acknowledgment in the product documentation would be
+ *    appreciated but is not required.
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ *    misrepresented as being the original software.
+ * 3. This notice may not be removed or altered from any source distribution.
+ **/
+
+#pragma once
+
+// LOVE
+#include "common/config.h"
+#include "common/StringMap.h"
+#include "common/math.h"
+#include "image/ImageData.h"
+#include "image/CompressedImageData.h"
+#include "Texture.h"
+
+namespace love
+{
+namespace graphics
+{
+
+class Image : public Texture
+{
+public:
+
+	static love::Type type;
+
+	enum SettingType
+	{
+		SETTING_MIPMAPS,
+		SETTING_LINEAR,
+		SETTING_PIXELDENSITY,
+		SETTING_MAX_ENUM
+	};
+
+	struct Settings
+	{
+		bool mipmaps = false;
+		bool linear = false;
+		float pixeldensity = 1.0f;
+	};
+
+	Image(const Settings &settings);
+	virtual ~Image();
+
+	virtual const std::vector<StrongRef<love::image::ImageData>> &getImageData() const = 0;
+	virtual const std::vector<StrongRef<love::image::CompressedImageData>> &getCompressedData() const = 0;
+
+	virtual void setMipmapSharpness(float sharpness) = 0;
+	virtual float getMipmapSharpness() const = 0;
+
+	virtual bool isCompressed() const = 0;
+
+	virtual bool refresh(int xoffset, int yoffset, int w, int h) = 0;
+
+	const Settings &getFlags() const;
+
+	static bool getConstant(const char *in, SettingType &out);
+	static bool getConstant(SettingType in, const char *&out);
+
+	static int imageCount;
+
+protected:
+
+	// The settings used to initialize this Image.
+	Settings settings;
+	
+	static StringMap<SettingType, SETTING_MAX_ENUM>::Entry settingTypeEntries[];
+	static StringMap<SettingType, SETTING_MAX_ENUM> settingTypes;
+	
+}; // Image
+
+} // graphics
+} // love