Add Geometries (replaces Quads).

A Geometry is a collection of vertices describing a non self-intersecting
(simple) polygon. In addition to screen coordinates, the vertices have
attributes for texture coordinates (s,t) and color (r,g,b,a).

It can be used as a quad, to display distorted images, or anything in between.

Added:
^^^^^^

-- geometry from table, where table has the format:
-- info = {
-- {x,y, s,t, [r = 255, g = 255, b = 255, a = 255]}
-- {x,y, s,t, [r = 255, g = 255, b = 255, a = 255]}
-- ...
-- }
geom = love.graphics.newGeometry(info)

-- convenience wrapper for quads (same as before)
geom = love.graphics.newQuad(x,y, w,h, sw,sh)

-- retrieve vertex i (1-indexed)
x,y,s,t,r,g,b,a = geom:getVertex(i)

-- set vertex i (1-indexed)
geom:setVertex(i, x,y, s,t, [r,g,b,a])

-- flip geometry
geom:flip(x, y)


Renamed:
^^^^^^^^

love.graphics.drawq() -> love.graphics.drawg()


Removed:
^^^^^^^^

quad:setViewport()
quad:getViewport()

src/modules/graphics/opengl/wrap_Geometry.cpp

@@ -0,0 +1,119 @@
+/**
+ * Copyright (c) 2006-2013 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_Geometry.h"
+#include "common/Exception.h"
+
+namespace love
+{
+namespace graphics
+{
+namespace opengl
+{
+
+Geometry *luax_checkgeometry(lua_State *L, int idx)
+{
+	return luax_checktype<Geometry>(L, idx, "Geometry", GRAPHICS_GEOMETRY_T);
+}
+
+// different name than in Geometry.cpp to make the triangulation transparent
+int w_Geometry_getVertexCount(lua_State *L)
+{
+	Geometry *geom = luax_checktype<Geometry>(L, 1, "Geometry", GRAPHICS_GEOMETRY_T);
+	lua_pushinteger(L, geom->getNumVertices());
+	return 1;
+}
+
+int w_Geometry_getVertex(lua_State *L)
+{
+	Geometry *geom = luax_checktype<Geometry>(L, 1, "Geometry", GRAPHICS_GEOMETRY_T);
+	size_t i = size_t(luaL_checkint(L, 2));
+	try
+	{
+		const vertex &v = geom->getVertex(i-1);
+		lua_pushnumber(L, v.x);
+		lua_pushnumber(L, v.y);
+		lua_pushnumber(L, v.s);
+		lua_pushnumber(L, v.t);
+		lua_pushnumber(L, v.r);
+		lua_pushnumber(L, v.g);
+		lua_pushnumber(L, v.b);
+		lua_pushnumber(L, v.a);
+	}
+	catch (Exception &e)
+	{
+		return luaL_error(L, e.what());
+	}
+
+	return 8;
+}
+
+int w_Geometry_setVertex(lua_State *L)
+{
+	Geometry *geom = luax_checktype<Geometry>(L, 1, "Geometry", GRAPHICS_GEOMETRY_T);
+	size_t i = size_t(luaL_checkint(L, 2));
+
+	vertex v;
+	v.x = luaL_checknumber(L, 3);
+	v.y = luaL_checknumber(L, 4);
+	v.s = luaL_checknumber(L, 5);
+	v.t = luaL_checknumber(L, 6);
+	v.r = luaL_optint(L,  7, 255);
+	v.g = luaL_optint(L,  8, 255);
+	v.b = luaL_optint(L,  9, 255);
+	v.a = luaL_optint(L, 10, 255);
+
+	try
+	{
+		geom->setVertex(i-1, v);
+	}
+	catch (Exception &e)
+	{
+		return luaL_error(L, e.what());
+	}
+
+	return 0;
+}
+
+int w_Geometry_flip(lua_State *L)
+{
+	Geometry *geom = luax_checktype<Geometry>(L, 1, "Geometry", GRAPHICS_GEOMETRY_T);
+	geom->flip(luax_toboolean(L, 2), luax_toboolean(L, 3));
+	return 0;
+}
+
+static const luaL_Reg w_Geometry_functions[] =
+{
+	{ "getVertexCount", w_Geometry_getVertexCount },
+	{ "getVertex", w_Geometry_getVertex },
+	{ "setVertex", w_Geometry_setVertex },
+	{ "flip", w_Geometry_flip },
+	{ 0, 0 }
+};
+
+extern "C" int luaopen_geometry(lua_State *L)
+{
+	return luax_register_type(L, "Geometry", w_Geometry_functions);
+}
+
+} // opengl
+} // graphics
+} // love