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Improved the performance of Shader:send when matrices are used.

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This commit is contained in:
Alex Szpakowski
2015-11-24 14:25:52 -04:00
parent 2990b6d440
commit 75faf77d66
3 changed files with 71 additions and 64 deletions
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src/modules/graphics/opengl/wrap_Shader.cpp
+60 -55
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@@ -229,38 +229,88 @@ int w_Shader_sendMatrix(lua_State *L)
if (!lua_istable(L, 3))
return luax_typerror(L, 3, "matrix table");
lua_getfield(L, 3, "dimension");
int dimension = (int) lua_tointeger(L, -1);
int dimension = 0;
lua_rawgeti(L, 3, 1);
if (lua_istable(L, -1))
dimension = (int) luax_objlen(L, 3);
lua_pop(L, 1);
if (dimension == 0)
{
lua_getfield(L, 3, "dimension");
if (!lua_isnoneornil(L, -1))
dimension = (int) lua_tointeger(L, -1);
lua_pop(L, 1);
}
if (dimension < 2 || dimension > 4)
return luaL_error(L, "Invalid matrix size: %dx%d (only 2x2, 3x3 and 4x4 matrices are supported).",
dimension, dimension);
float *values = new float[dimension * dimension * count];
for (int i = 0; i < count; ++i)
{
lua_getfield(L, 3+i, "dimension");
if (lua_tointeger(L, -1) != dimension)
int other_dimension = 0;
lua_rawgeti(L, 3+i, 1);
bool table_of_tables = lua_istable(L, -1);
if (table_of_tables)
other_dimension = luax_objlen(L, -1);
lua_pop(L, 1);
if (!table_of_tables)
{
lua_getfield(L, 3+i, "dimension");
other_dimension = lua_tointeger(L, -1);
lua_pop(L, 1);
}
if (other_dimension != dimension)
{
// You unlock this door with the key of imagination. Beyond it is
// another dimension: a dimension of sound, a dimension of sight,
// a dimension of mind. You're moving into a land of both shadow
// and substance, of things and ideas. You've just crossed over
// into... the Twilight Zone.
int other_dimension = (int) lua_tointeger(L, -1);
delete[] values;
return luaL_error(L, "Invalid matrix size at argument %d: Expected size %dx%d, got %dx%d.",
3+i, dimension, dimension, other_dimension, other_dimension);
}
for (int k = 1; k <= dimension*dimension; ++k)
if (table_of_tables)
{
lua_rawgeti(L, 3+i, k);
values[i * dimension * dimension + k - 1] = (float)lua_tonumber(L, -1);
}
int n = 0;
lua_pop(L, 1 + dimension);
for (int j = 1; j <= dimension; j++)
{
lua_rawgeti(L, 3+i, j);
for (int k = 1; k <= dimension; k++)
{
lua_rawgeti(L, -k, k);
values[i * dimension * dimension + n] = (float) lua_tonumber(L, -1);
n++;
}
lua_pop(L, dimension + 1);
}
}
else
{
for (int k = 1; k <= dimension*dimension; k++)
{
lua_rawgeti(L, 3+i, k);
values[i * dimension * dimension + k - 1] = (float) lua_tonumber(L, -1);
}
lua_pop(L, dimension*dimension);
}
}
luax_catchexcept(L,
@@ -281,48 +331,6 @@ int w_Shader_sendTexture(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 = (int) luax_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 (int i = 1; i <= (int) luax_objlen(L, matrix); i++)
{
// Push args[matrix][i] onto the stack.
lua_rawgeti(L, matrix, i);
luaL_checktype(L, -1, LUA_TTABLE);
for (int j = 1; j <= (int) luax_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);
@@ -352,10 +360,7 @@ int w_Shader_send(lua_State *L)
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: