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

--HG--
branch : minor

src/modules/graphics/wrap_Image.cpp

@@ -0,0 +1,158 @@
+/**
+ * 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.
+ **/
+
+// LOVE
+#include "wrap_Image.h"
+
+namespace love
+{
+namespace graphics
+{
+
+Image *luax_checkimage(lua_State *L, int idx)
+{
+	return luax_checktype<Image>(L, idx);
+}
+
+int w_Image_setMipmapFilter(lua_State *L)
+{
+	Image *t = luax_checkimage(L, 1);
+	Texture::Filter f = t->getFilter();
+
+	if (lua_isnoneornil(L, 2))
+		f.mipmap = Texture::FILTER_NONE; // mipmapping is disabled if no argument is given
+	else
+	{
+		const char *mipmapstr = luaL_checkstring(L, 2);
+		if (!Texture::getConstant(mipmapstr, f.mipmap))
+			return luaL_error(L, "Invalid filter mode: %s", mipmapstr);
+	}
+
+	luax_catchexcept(L, [&](){ t->setFilter(f); });
+	t->setMipmapSharpness((float) luaL_optnumber(L, 3, 0.0));
+
+	return 0;
+}
+
+int w_Image_getMipmapFilter(lua_State *L)
+{
+	Image *t = luax_checkimage(L, 1);
+
+	const Texture::Filter &f = t->getFilter();
+
+	const char *mipmapstr;
+	if (Texture::getConstant(f.mipmap, mipmapstr))
+		lua_pushstring(L, mipmapstr);
+	else
+		lua_pushnil(L); // only return a mipmap filter if mipmapping is enabled
+
+	lua_pushnumber(L, t->getMipmapSharpness());
+	return 2;
+}
+
+int w_Image_isCompressed(lua_State *L)
+{
+	Image *i = luax_checkimage(L, 1);
+	luax_pushboolean(L, i->isCompressed());
+	return 1;
+}
+
+int w_Image_refresh(lua_State *L)
+{
+	Image *i = luax_checkimage(L, 1);
+
+	int xoffset = (int) luaL_optnumber(L, 2, 0);
+	int yoffset = (int) luaL_optnumber(L, 3, 0);
+	int w = (int) luaL_optnumber(L, 4, i->getWidth());
+	int h = (int) luaL_optnumber(L, 5, i->getHeight());
+
+	luax_catchexcept(L, [&](){ i->refresh(xoffset, yoffset, w, h); });
+	return 0;
+}
+
+int w_Image_getData(lua_State *L)
+{
+	Image *i = luax_checkimage(L, 1);
+	int n = 0;
+
+	if (i->isCompressed())
+	{
+		for (const auto &cdata : i->getCompressedData())
+		{
+			luax_pushtype(L, cdata.get());
+			n++;
+		}
+	}
+	else
+	{
+		for (const auto &data : i->getImageData())
+		{
+			luax_pushtype(L, data.get());
+			n++;
+		}
+	}
+
+	return n;
+}
+
+const char *luax_imageSettingName(Image::SettingType settingtype)
+{
+	const char *name = nullptr;
+	Image::getConstant(settingtype, name);
+	return name;
+}
+
+int w_Image_getFlags(lua_State *L)
+{
+	Image *i = luax_checkimage(L, 1);
+	Image::Settings settings = i->getFlags();
+
+	lua_createtable(L, 0, 2);
+
+	lua_pushboolean(L, settings.mipmaps);
+	lua_setfield(L, -2, luax_imageSettingName(Image::SETTING_MIPMAPS));
+
+	lua_pushboolean(L, settings.linear);
+	lua_setfield(L, -2, luax_imageSettingName(Image::SETTING_LINEAR));
+
+	lua_pushnumber(L, settings.pixeldensity);
+	lua_setfield(L, -2, luax_imageSettingName(Image::SETTING_PIXELDENSITY));
+
+	return 1;
+}
+
+static const luaL_Reg w_Image_functions[] =
+{
+	{ "setMipmapFilter", w_Image_setMipmapFilter },
+	{ "getMipmapFilter", w_Image_getMipmapFilter },
+	{ "isCompressed", w_Image_isCompressed },
+	{ "refresh", w_Image_refresh },
+	{ "getData", w_Image_getData },
+	{ "getFlags", w_Image_getFlags },
+	{ 0, 0 }
+};
+
+extern "C" int luaopen_image(lua_State *L)
+{
+	return luax_register_type(L, &Image::type, w_Texture_functions, w_Image_functions, nullptr);
+}
+
+} // graphics
+} // love