mirror of
https://github.com/love2d/love.git
synced 2026-08-14 10:13:46 +02:00
Converted code for Shader:send from Lua to C++
This commit is contained in:
Alex Szpakowski
@@ -197,7 +197,7 @@ int w_Shader_sendMatrix(lua_State *L)
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if (dimension < 2 || dimension > 4)
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return luaL_error(L, "Invalid matrix size: %dx%d (only 2x2, 3x3 and 4x4 matrices are supported).",
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count, count);
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dimension, dimension);
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float *values = new float[dimension * dimension * count];
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for (int i = 0; i < count; ++i)
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@@ -275,15 +275,102 @@ int w_Shader_sendCanvas(lua_State *L)
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return 0;
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}
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// Convert matrices on the stack for use with sendMatrix.
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static void w_convertMatrices(lua_State *L, int idx)
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{
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int matrixcount = lua_gettop(L) - (idx - 1);
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for (int matrix = idx; matrix < idx + matrixcount; matrix++)
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{
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luaL_checktype(L, matrix, LUA_TTABLE);
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int dimension = lua_objlen(L, matrix);
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int newi = 1;
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lua_createtable(L, dimension * dimension, 0);
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// Collapse {{a,b,c}, {d,e,f}, ...} to {a,b,c, d,e,f, ...}
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for (size_t i = 1; i <= lua_objlen(L, matrix); i++)
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{
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// Push args[matrix][i] onto the stack.
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lua_rawgeti(L, matrix, i);
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luaL_checktype(L, -1, LUA_TTABLE);
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for (size_t j = 1; j <= lua_objlen(L, -1); j++)
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{
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// Push args[matrix[i][j] onto the stack.
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lua_rawgeti(L, -1, j);
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luaL_checktype(L, -1, LUA_TNUMBER);
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// newtable[newi] = args[matrix][i][j]
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lua_rawseti(L, -3, newi++);
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}
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lua_pop(L, 1);
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}
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// newtable.dimension = #args[matrix]
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lua_pushinteger(L, dimension);
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lua_setfield(L, -2, "dimension");
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// Replace args[i] with the new table
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lua_replace(L, matrix);
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}
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}
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int w_Shader_send(lua_State *L)
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{
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int ttype = lua_type(L, 3);
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Proxy *p = 0;
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switch (ttype)
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{
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case LUA_TNUMBER:
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case LUA_TBOOLEAN:
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// Scalar float/boolean.
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return w_Shader_sendFloat(L);
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break;
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case LUA_TUSERDATA:
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// Image or Canvas.
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p = (Proxy *) lua_touserdata(L, 3);
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if (p->flags[GRAPHICS_IMAGE_ID])
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return w_Shader_sendImage(L);
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else if (p->flags[GRAPHICS_CANVAS_ID])
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return w_Shader_sendCanvas(L);
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break;
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case LUA_TTABLE:
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// Vector or Matrix.
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lua_rawgeti(L, 3, 1);
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ttype = lua_type(L, -1);
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lua_pop(L, 1);
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if (ttype == LUA_TNUMBER || ttype == LUA_TBOOLEAN)
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return w_Shader_sendFloat(L);
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else if (ttype == LUA_TTABLE)
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{
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w_convertMatrices(L, 3);
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return w_Shader_sendMatrix(L);
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}
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break;
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default:
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break;
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}
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return luaL_argerror(L, 3, "number, boolean, table, image, or canvas expected");
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}
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static const luaL_Reg functions[] =
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{
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{ "getWarnings", w_Shader_getWarnings },
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{ "sendInt", w_Shader_sendInt },
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{ "sendBoolean", w_Shader_sendInt },
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{ "sendFloat", w_Shader_sendFloat },
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{ "sendMatrix", w_Shader_sendMatrix },
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{ "sendImage", w_Shader_sendImage },
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{ "sendCanvas", w_Shader_sendCanvas },
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{ "send", w_Shader_send },
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{ 0, 0 }
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};
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@@ -37,6 +37,7 @@ int w_Shader_sendInt(lua_State *L);
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int w_Shader_sendFloat(lua_State *L);
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int w_Shader_sendMatrix(lua_State *L);
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int w_Shader_sendImage(lua_State *L);
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int w_Shader_send(lua_State *L);
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extern "C" int luaopen_shader(lua_State *L);
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} // opengl
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@@ -1452,72 +1452,4 @@ void main() {
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if #lines == 1 then return message end
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return table_concat(lines, "\n")
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end
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-- helper to transform a matrix from {{a,b,c}, {d,e,f}, ...} to
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-- {a, b, c, d, e, f, ...}
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local function flattenMatrices(mat, ...)
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if not mat then return end
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local tonumber = tonumber
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local ret,l = {}, 1
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ret.dimension = #mat
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for i = 1,#mat do
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for k = 1,#mat[i] do
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ret[l], l = tonumber(mat[i][k]), l+1
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end
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end
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return ret, flattenMatrices(...)
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end
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-- automagic uniform setter
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local function shader_dispatch_send(self, name, value, ...)
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local valuetype = type(value)
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if valuetype == "number" or valuetype == "boolean" then -- scalar
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self:sendFloat(name, value, ...)
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elseif valuetype == "userdata" and value:typeOf("Image") then
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self:sendImage(name, value)
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elseif valuetype == "userdata" and value:typeOf("Canvas") then
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self:sendCanvas(name, value)
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elseif valuetype == "table" then -- vector or matrix
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valuetype = type(value[1])
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if valuetype == "number" or valuetype == "boolean" then
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self:sendFloat(name, value, ...)
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elseif valuetype == "table" then
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self:sendMatrix(name, flattenMatrices(value, ...))
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else
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error("Cannot send value (unsupported type: {"..valuetype.."}).")
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end
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else
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if valuetype == "userdata" and value.type then valuetype = value.type end
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error("Cannot send value (unsupported type: "..valuetype..").")
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end
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end
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local function shader_send_protected(self, name, value, ...)
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local success, err = pcall(shader_dispatch_send, self, name, value, ...)
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if not success then
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if err and type(err) == "string" then
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err = err:gsub("^(.-):(%d+): ", "")
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end
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error(err, 2)
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end
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end
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local newShader = love.graphics.newShader
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function love.graphics.newShader(vertexcode, pixelcode)
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love.graphics.newShader = newShader
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local success, shader = pcall(love.graphics.newShader, vertexcode, pixelcode)
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if success then
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local meta = getmetatable(shader)
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meta.send = shader_send_protected
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meta.sendBoolean = meta.sendFloat
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return shader
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else
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return error(shader, 2)
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end
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end
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end
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@@ -6589,145 +6589,6 @@ const unsigned char graphics_lua[] =
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}; // [graphics.lua]
|
||||
} // love
|
||||
Reference in New Issue
Block a user