Converted code for Shader:send from Lua to C++

src/modules/graphics/opengl/wrap_Shader.cpp

@@ -197,7 +197,7 @@ int w_Shader_sendMatrix(lua_State *L)
 
 	if (dimension < 2 || dimension > 4)
 		return luaL_error(L, "Invalid matrix size: %dx%d (only 2x2, 3x3 and 4x4 matrices are supported).",
-						  count, count);
+						  dimension, dimension);
 
 	float *values = new float[dimension * dimension * count];
 	for (int i = 0; i < count; ++i)
@@ -275,15 +275,102 @@ int w_Shader_sendCanvas(lua_State *L)
 	return 0;
 }
 
+// Convert matrices on the stack for use with sendMatrix.
+static void w_convertMatrices(lua_State *L, int idx)
+{
+	int matrixcount = lua_gettop(L) - (idx - 1);
+
+	for (int matrix = idx; matrix < idx + matrixcount; matrix++)
+	{
+		luaL_checktype(L, matrix, LUA_TTABLE);
+		int dimension = lua_objlen(L, matrix);
+
+		int newi = 1;
+		lua_createtable(L, dimension * dimension, 0);
+
+		// Collapse {{a,b,c}, {d,e,f}, ...} to {a,b,c, d,e,f, ...}
+		for (size_t i = 1; i <= lua_objlen(L, matrix); i++)
+		{
+			// Push args[matrix][i] onto the stack.
+			lua_rawgeti(L, matrix, i);
+			luaL_checktype(L, -1, LUA_TTABLE);
+
+			for (size_t j = 1; j <= lua_objlen(L, -1); j++)
+			{
+				// Push args[matrix[i][j] onto the stack.
+				lua_rawgeti(L, -1, j);
+				luaL_checktype(L, -1, LUA_TNUMBER);
+
+				// newtable[newi] = args[matrix][i][j]
+				lua_rawseti(L, -3, newi++);
+			}
+
+			lua_pop(L, 1);
+		}
+
+		// newtable.dimension = #args[matrix]
+		lua_pushinteger(L, dimension);
+		lua_setfield(L, -2, "dimension");
+
+		// Replace args[i] with the new table
+		lua_replace(L, matrix);
+	}
+}
+
+int w_Shader_send(lua_State *L)
+{
+	int ttype = lua_type(L, 3);
+	Proxy *p = 0;
+
+	switch (ttype)
+	{
+	case LUA_TNUMBER:
+	case LUA_TBOOLEAN:
+		// Scalar float/boolean.
+		return w_Shader_sendFloat(L);
+		break;
+	case LUA_TUSERDATA:
+		// Image or Canvas.
+		p = (Proxy *) lua_touserdata(L, 3);
+
+		if (p->flags[GRAPHICS_IMAGE_ID])
+			return w_Shader_sendImage(L);
+		else if (p->flags[GRAPHICS_CANVAS_ID])
+			return w_Shader_sendCanvas(L);
+
+		break;
+	case LUA_TTABLE:
+		// Vector or Matrix.
+		lua_rawgeti(L, 3, 1);
+		ttype = lua_type(L, -1);
+		lua_pop(L, 1);
+
+		if (ttype == LUA_TNUMBER || ttype == LUA_TBOOLEAN)
+			return w_Shader_sendFloat(L);
+		else if (ttype == LUA_TTABLE)
+		{
+			w_convertMatrices(L, 3);
+			return w_Shader_sendMatrix(L);
+		}
+
+		break;
+	default:
+		break;
+	}
+
+	return luaL_argerror(L, 3, "number, boolean, table, image, or canvas expected");
+}
 
 static const luaL_Reg functions[] =
 {
 	{ "getWarnings", w_Shader_getWarnings },
 	{ "sendInt",     w_Shader_sendInt },
+	{ "sendBoolean", w_Shader_sendInt },
 	{ "sendFloat",   w_Shader_sendFloat },
 	{ "sendMatrix",  w_Shader_sendMatrix },
 	{ "sendImage",   w_Shader_sendImage },
 	{ "sendCanvas",  w_Shader_sendCanvas },
+	{ "send",        w_Shader_send },
 	{ 0, 0 }
 };
 

src/modules/graphics/opengl/wrap_Shader.h

@@ -37,6 +37,7 @@ int w_Shader_sendInt(lua_State *L);
 int w_Shader_sendFloat(lua_State *L);
 int w_Shader_sendMatrix(lua_State *L);
 int w_Shader_sendImage(lua_State *L);
+int w_Shader_send(lua_State *L);
 extern "C" int luaopen_shader(lua_State *L);
 
 } // opengl

src/scripts/graphics.lua

@@ -1452,72 +1452,4 @@ void main() {
 		if #lines == 1 then return message end
 		return table_concat(lines, "\n")
 	end
-
-	-- helper to transform a matrix from {{a,b,c}, {d,e,f}, ...} to
-	-- {a, b, c, d, e, f, ...}
-	local function flattenMatrices(mat, ...)
-		if not mat then return end
-
-		local tonumber = tonumber
-
-		local ret,l = {}, 1
-		ret.dimension = #mat
-
-		for i = 1,#mat do
-			for k = 1,#mat[i] do
-				ret[l], l = tonumber(mat[i][k]), l+1
-			end
-		end
-
-		return ret, flattenMatrices(...)
-	end
-
-	-- automagic uniform setter
-	local function shader_dispatch_send(self, name, value, ...)
-		local valuetype = type(value)
-		if valuetype == "number" or valuetype == "boolean" then -- scalar
-			self:sendFloat(name, value, ...)
-		elseif valuetype == "userdata" and value:typeOf("Image") then
-			self:sendImage(name, value)
-		elseif valuetype == "userdata" and value:typeOf("Canvas") then
-			self:sendCanvas(name, value)
-		elseif valuetype == "table" then      -- vector or matrix
-			valuetype = type(value[1])
-			if valuetype == "number" or valuetype == "boolean" then
-				self:sendFloat(name, value, ...)
-			elseif valuetype == "table" then
-				self:sendMatrix(name, flattenMatrices(value, ...))
-			else
-				error("Cannot send value (unsupported type: {"..valuetype.."}).")
-			end
-		else
-			if valuetype == "userdata" and value.type then valuetype = value.type end
-			error("Cannot send value (unsupported type: "..valuetype..").")
-		end
-	end
-
-	local function shader_send_protected(self, name, value, ...)
-		local success, err = pcall(shader_dispatch_send, self, name, value, ...)
-		if not success then
-			if err and type(err) == "string" then
-				err = err:gsub("^(.-):(%d+): ", "")
-			end
-			error(err, 2)
-		end
-	end
-
-	local newShader = love.graphics.newShader
-	function love.graphics.newShader(vertexcode, pixelcode)
-		love.graphics.newShader = newShader
-
-		local success, shader = pcall(love.graphics.newShader, vertexcode, pixelcode)
-		if success then
-			local meta = getmetatable(shader)
-			meta.send = shader_send_protected
-			meta.sendBoolean = meta.sendFloat
-			return shader
-		else
-			return error(shader, 2)
-		end
-	end
 end

src/scripts/graphics.lua.h

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 }; // [graphics.lua]
 } // love