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

--HG--
branch : minor

src/modules/graphics/Image.cpp

@@ -0,0 +1,68 @@
+/**
+ * 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.
+ **/
+
+#include "Image.h"
+
+namespace love
+{
+namespace graphics
+{
+
+love::Type Image::type("Image", &Texture::type);
+
+int Image::imageCount = 0;
+
+Image::Image(const Settings &settings)
+	: settings(settings)
+{
+	++imageCount;
+}
+
+Image::~Image()
+{
+	--imageCount;
+}
+
+const Image::Settings &Image::getFlags() const
+{
+	return settings;
+}
+
+bool Image::getConstant(const char *in, SettingType &out)
+{
+	return settingTypes.find(in, out);
+}
+
+bool Image::getConstant(SettingType in, const char *&out)
+{
+	return settingTypes.find(in, out);
+}
+
+StringMap<Image::SettingType, Image::SETTING_MAX_ENUM>::Entry Image::settingTypeEntries[] =
+{
+	{ "mipmaps",      SETTING_MIPMAPS      },
+	{ "linear",       SETTING_LINEAR       },
+	{ "pixeldensity", SETTING_PIXELDENSITY },
+};
+
+StringMap<Image::SettingType, Image::SETTING_MAX_ENUM> Image::settingTypes(Image::settingTypeEntries, sizeof(Image::settingTypeEntries));
+
+} // graphics
+} // love