General cleaning up.
Make LuaCairoMatrix be non-broken (hopefully - neither tested that it was in fact broken nor that new code unbreaks it :D!) Work on LuaCairoPath to make it script-buildable, and implement map and fold methods. Originally committed to SVN as r1478.
This commit is contained in:
Niels Martin Hansen
parent
06452148d2
commit
da8c8abc7d
2 changed files with 338 additions and 21 deletions
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@ -34,6 +34,8 @@
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#endif
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// Macros to help implementing callables
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#define CALLABLE_IMPL(C,N) int C ## ::lua_ ## N (lua_State *L)
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#define CALLABLE_NOTIMPL(C,N) CALLABLE_IMPL(C,N) { lua_pushliteral(L, "Method " # N " in class " # C " is not implemented"); lua_error(L); return 0; }
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#define CALLABLE_REG(name) AddCallable(lua_ ## name, # name)
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@ -41,6 +43,7 @@
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// Maps from strings to various Cairo enum types
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static const char *status_names_list[] = {
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"success",
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"no_memory",
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@ -75,7 +78,9 @@ static const char *pattern_extend_list[] = {"none", "repeat", "reflect", "pad",
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static const char *pattern_filter_list[] = {"fast", "good", "best", "nearest", "bilinear", "gaussian", 0};
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static const char *pattern_type_list[] = {"solid", "surface", "linear", "radial", 0};
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// Misc. helper functions
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static void font_extents_to_lua(lua_State *L, cairo_font_extents_t &extents)
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{
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lua_newtable(L);
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@ -90,6 +95,7 @@ static void font_extents_to_lua(lua_State *L, cairo_font_extents_t &extents)
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lua_pushnumber(L, extents.max_y_advance);
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lua_setfield(L, -2, "max_y_advance");
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}
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static void text_extents_to_lua(lua_State *L, cairo_text_extents_t &extents)
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{
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lua_newtable(L);
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@ -108,6 +114,8 @@ static void text_extents_to_lua(lua_State *L, cairo_text_extents_t &extents)
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}
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// Context (cairo_t)
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CALLABLE_IMPL(LuaCairoContext, reference)
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{
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LuaCairoContext *ctx = GetObjPointer(L, lua_upvalueindex(1));
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@ -1084,6 +1092,8 @@ LuaCairoContext::~LuaCairoContext()
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}
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// Surface (cairo_surface_t)
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CALLABLE_IMPL(LuaCairoSurface, create_similar)
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{
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LuaCairoSurface *surf = GetObjPointer(L, lua_upvalueindex(1));
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@ -1367,6 +1377,8 @@ LuaCairoSurface::~LuaCairoSurface()
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}
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// Font face (cairo_font_face_t)
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CALLABLE_NOTIMPL(LuaCairoFontFace, create_scaled_font)
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CALLABLE_NOTIMPL(LuaCairoFontFace, reference)
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@ -1403,6 +1415,8 @@ LuaCairoFontFace::~LuaCairoFontFace()
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}
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// Scaled font (cairo_scaled_font_t)
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CALLABLE_NOTIMPL(LuaCairoScaledFont, reference)
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CALLABLE_IMPL(LuaCairoScaledFont, status)
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@ -1497,6 +1511,8 @@ LuaCairoScaledFont::~LuaCairoScaledFont()
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}
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// Font options (cairo_font_options_t)
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CALLABLE_IMPL(LuaCairoFontOptions, copy)
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{
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LuaCairoFontOptions *fo = GetObjPointer(L, lua_upvalueindex(1));
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@ -1632,10 +1648,6 @@ const char *LuaCairoFontOptions::GetTypeName()
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return "font_options";
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}
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void LuaCairoFontOptions::CreateMetaTable(lua_State *L)
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{
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}
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LuaCairoFontOptions::LuaCairoFontOptions(lua_State *L) :
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LuaCairoBase(L)
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{
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@ -1661,6 +1673,8 @@ LuaCairoFontOptions::~LuaCairoFontOptions()
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}
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// Matrix (cairo_matrix_t)
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CALLABLE_IMPL(LuaCairoMatrix, init)
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{
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LuaCairoMatrix *mat = (LuaCairoMatrix*)GetObjPointer(L, lua_upvalueindex(1));
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@ -1946,7 +1960,7 @@ CALLABLE_IMPL(LuaCairoMatrix, create)
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return 1;
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}
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void LuaCairoMatrix::RegMatrixCallables()
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void LuaCairoMatrix::RegMatrixCallables(lua_State *L)
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{
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CALLABLE_REG(init);
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CALLABLE_REG(init_identity);
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@ -2027,13 +2041,25 @@ const char *LuaCairoMatrix::GetTypeName()
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void LuaCairoMatrix::CreateMetaTable(lua_State *L)
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{
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LuaCairoBase::CreateMetaTable(L);
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// TODO: reg arithmetic operators here
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lua_pushcclosure(L, lua_op_add, 0);
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lua_setfield(L, -2, "__add");
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lua_pushcclosure(L, lua_op_sub, 0);
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lua_setfield(L, -2, "__sub");
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lua_pushcclosure(L, lua_op_mul, 0);
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lua_setfield(L, -2, "__mul");
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lua_pushcclosure(L, lua_op_div, 0);
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lua_setfield(L, -2, "__div");
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lua_pushcclosure(L, lua_op_unm, 0);
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lua_setfield(L, -2, "__unm");
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lua_pushcclosure(L, lua_op_eq, 0);
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lua_setfield(L, -2, "__eq");
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}
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LuaCairoMatrix::LuaCairoMatrix(lua_State *L) :
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LuaCairoBase(L)
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{
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RegMatrixCallables();
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RegMatrixCallables(L);
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cairo_matrix_init_identity(&matrix);
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}
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@ -2041,7 +2067,7 @@ LuaCairoMatrix::LuaCairoMatrix(lua_State *L) :
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LuaCairoMatrix::LuaCairoMatrix(lua_State *L, const cairo_matrix_t *_matrix) :
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LuaCairoBase(L)
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{
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RegMatrixCallables();
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RegMatrixCallables(L);
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memcpy(&matrix, _matrix, sizeof(matrix));
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}
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@ -2057,7 +2083,188 @@ cairo_matrix_t *LuaCairoMatrix::GetMatrix()
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}
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CALLABLE_NOTIMPL(LuaCairoPath, map)
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// Path (cairo_path_t)
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static void path_element_to_lua(cairo_path_data_t *path, lua_State *L)
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{
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lua_newtable(L);
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switch (path[0].header.type) {
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case CAIRO_PATH_MOVE_TO:
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lua_pushliteral(L, "move_to");
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lua_setfield(L, -2, "type");
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lua_pushnumber(L, path[1].point.x);
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lua_setfield(L, -2, "x");
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lua_pushnumber(L, path[1].point.y);
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lua_setfield(L, -2, "y");
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break;
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case CAIRO_PATH_LINE_TO:
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lua_pushliteral(L, "line_to");
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lua_setfield(L, -2, "type");
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lua_pushnumber(L, path[1].point.x);
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lua_setfield(L, -2, "x");
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lua_pushnumber(L, path[1].point.y);
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lua_setfield(L, -2, "y");
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break;
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case CAIRO_PATH_CURVE_TO:
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lua_pushliteral(L, "curve_to");
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lua_setfield(L, -2, "type");
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lua_pushnumber(L, path[1].point.x);
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lua_setfield(L, -2, "x0");
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lua_pushnumber(L, path[1].point.y);
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lua_setfield(L, -2, "y0");
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lua_pushnumber(L, path[2].point.x);
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lua_setfield(L, -2, "x1");
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lua_pushnumber(L, path[2].point.y);
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lua_setfield(L, -2, "y1");
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lua_pushnumber(L, path[3].point.x);
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lua_setfield(L, -2, "x2");
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lua_pushnumber(L, path[3].point.y);
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lua_setfield(L, -2, "y2");
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break;
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case CAIRO_PATH_CLOSE_PATH:
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lua_pushliteral(L, "close");
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lua_setfield(L, -2, "type");
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break;
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default:
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lua_pushliteral(L, "unknown");
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lua_setfield(L, -2, "type");
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break;
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}
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}
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static void read_lua_path_element(lua_State *L, cairo_path_data_t *path)
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{
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lua_getfield(L, -1, "type");
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if (!lua_isstring(L, -1)) {
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luaL_error(L, "Invalid or missing 'type' field in path element table");
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return;
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}
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const char *type = lua_tostring(L, -1);
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if (strcmp(type, "move_to") == 0) {
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path[0].header.length = 2;
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path[0].header.type = CAIRO_PATH_MOVE_TO;
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lua_getfield(L, -2, "x");
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lua_getfield(L, -3, "y");
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if (!lua_isnumber(L, -1) || !lua_isnumber(L, -2)) {
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luaL_error(L, "Invalid 'x' or 'y' field in path element table with type 'move_to'");
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return;
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}
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path[1].point.x = lua_tonumber(L, -2);
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path[1].point.y = lua_tonumber(L, -1);
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lua_pop(L, 3);
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return;
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} else if (strcmp(type, "line_to") == 0) {
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path[0].header.length = 2;
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path[0].header.type = CAIRO_PATH_LINE_TO;
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lua_getfield(L, -2, "x");
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lua_getfield(L, -3, "y");
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if (!lua_isnumber(L, -1) || !lua_isnumber(L, -2)) {
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luaL_error(L, "Invalid 'x' or 'y' field in path element table with type 'line_to'");
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return;
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}
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path[1].point.x = lua_tonumber(L, -2);
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path[1].point.y = lua_tonumber(L, -1);
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lua_pop(L, 3);
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return;
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} else if (strcmp(type, "curve_to") == 0) {
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path[0].header.length = 4;
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path[0].header.type = CAIRO_PATH_CURVE_TO;
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lua_getfield(L, -2, "x0");
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lua_getfield(L, -3, "y0");
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if (!lua_isnumber(L, -1) || !lua_isnumber(L, -2)) {
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luaL_error(L, "Invalid 'x0' or 'y0' field in path element table with type 'line_to'");
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return;
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}
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path[1].point.x = lua_tonumber(L, -2);
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path[1].point.y = lua_tonumber(L, -1);
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lua_getfield(L, -4, "x1");
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lua_getfield(L, -5, "y1");
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if (!lua_isnumber(L, -1) || !lua_isnumber(L, -2)) {
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luaL_error(L, "Invalid 'x1' or 'y1' field in path element table with type 'line_to'");
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return;
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}
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path[2].point.x = lua_tonumber(L, -2);
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path[2].point.y = lua_tonumber(L, -1);
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lua_getfield(L, -2, "x2");
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lua_getfield(L, -3, "y2");
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if (!lua_isnumber(L, -1) || !lua_isnumber(L, -2)) {
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luaL_error(L, "Invalid 'x2' or 'y2' field in path element table with type 'line_to'");
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return;
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}
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path[3].point.x = lua_tonumber(L, -2);
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path[3].point.y = lua_tonumber(L, -1);
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lua_pop(L, 7);
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return;
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} else if (strcmp(type, "close") == 0) {
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path[0].header.length = 1;
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path[0].header.type = CAIRO_PATH_CLOSE_PATH;
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lua_pop(L, 1);
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return;
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} else {
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luaL_error(L, "Invalid 'type' field in path element table, '%s'", type);
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}
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}
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CALLABLE_NOTIMPL(LuaCairoPath, clear)
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CALLABLE_NOTIMPL(LuaCairoPath, move_to)
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CALLABLE_NOTIMPL(LuaCairoPath, line_to)
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CALLABLE_NOTIMPL(LuaCairoPath, curve_to)
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CALLABLE_NOTIMPL(LuaCairoPath, close)
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CALLABLE_IMPL(LuaCairoPath, map)
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{
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LuaCairoPath *path = GetObjPointer(L, lua_upvalueindex(1));
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if (!lua_isfunction(L, 1)) {
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luaL_error(L, "First argument to path.map_coords must be a function, is %s", luaL_typename(L, 1));
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return 0;
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}
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// Function should be p->p
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cairo_path_t *p = path->path;
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if (!p->num_data || !p->data) return 0;
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// Prepare a new path for building
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path->path = (cairo_path_t*)malloc(sizeof(cairo_path_t));
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cairo_path_t *np = path->path;
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np->num_data = 0;
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np->status = CAIRO_STATUS_SUCCESS;
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np->data = 0;
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cairo_path_data_t *pd = p->data;
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int outi = 0;
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for (int i = 0; i < p->num_data; ) {
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lua_pushvalue(L, 1);
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path_element_to_lua(pd, L);
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lua_call(L, 1, 1);
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path->EnsureSpaceFor(4); // dumb but simple, ensures there's always enough space for even the longest segments
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read_lua_path_element(L, np->data+outi);
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np->num_data += np->data[outi].header.length;
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outi += np->data[outi].header.length;
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i += pd->header.length;
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pd += pd->header.length;
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}
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if (path->cairo_owns_memory) {
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cairo_path_destroy(p);
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path->cairo_owns_memory = false;
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} else {
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free(p->data);
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free(p);
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}
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// Now just r should be left on top of stack
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return 1;}
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CALLABLE_IMPL(LuaCairoPath, map_coords)
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{
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@ -2096,7 +2303,35 @@ CALLABLE_IMPL(LuaCairoPath, map_coords)
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return 0;
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}
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CALLABLE_NOTIMPL(LuaCairoPath, fold);
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CALLABLE_IMPL(LuaCairoPath, fold)
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{
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LuaCairoPath *path = GetObjPointer(L, lua_upvalueindex(1));
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if (!lua_isfunction(L, 1)) {
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luaL_error(L, "First argument to path.map_coords must be a function, is %s", luaL_typename(L, 1));
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return 0;
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}
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luaL_checkany(L, 2);
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// Function should be (r,p)->r
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cairo_path_t *p = path->path;
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if (!p->num_data || !p->data) return 0;
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cairo_path_data_t *pd = p->data;
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lua_pushvalue(L, 2); // initial 'r' for function
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for (int i = 0; i < p->num_data; ) {
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lua_pushvalue(L, 1);
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lua_pushvalue(L, -2); // dig up 'r'
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lua_remove(L, -3); // remove dug up 'r'
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path_element_to_lua(pd, L);
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lua_call(L, 2, 1);
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// leave result 'r' on stack for next iteration or final return
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i += pd->header.length;
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pd += pd->header.length;
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}
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// Now just r should be left on top of stack
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return 1;
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}
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CALLABLE_IMPL(LuaCairoPath, fold_coords)
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{
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@ -2134,6 +2369,43 @@ CALLABLE_IMPL(LuaCairoPath, fold_coords)
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return 1;
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}
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void LuaCairoPath::EnsurePathOwned()
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{
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if (cairo_owns_memory) {
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cairo_path_t *np = (cairo_path_t*)malloc(sizeof(cairo_path_t));
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np->status = path->status;
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np->num_data = path->num_data;
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np->data = (cairo_path_data_t*)malloc(path->num_data*sizeof(cairo_path_data_t));
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memcpy(np->data, path->data, np->num_data*sizeof(cairo_path_data_t));
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cairo_path_destroy(path);
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path = np;
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cairo_owns_memory = false;
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}
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}
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void LuaCairoPath::EnsureSpaceFor(size_t n)
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{
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EnsurePathOwned();
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if (path_elements_allocated - path->num_data < n) {
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path_elements_allocated = path->num_data*2 + n;
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path->data = (cairo_path_data_t*)realloc(path->data, path_elements_allocated*sizeof(cairo_path_data_t));
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}
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}
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void LuaCairoPath::RegPathCallables(lua_State *L)
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{
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CALLABLE_REG(clear);
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CALLABLE_REG(move_to);
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CALLABLE_REG(line_to);
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CALLABLE_REG(curve_to);
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CALLABLE_REG(close);
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CALLABLE_REG(map);
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CALLABLE_REG(map_coords);
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CALLABLE_REG(fold);
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CALLABLE_REG(fold_coords);
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}
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int LuaCairoPath::internal_lua_index(lua_State *L)
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{
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return LuaCairoBase::internal_lua_index(L);
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@ -2144,24 +2416,41 @@ const char *LuaCairoPath::GetTypeName()
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return "path";
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}
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LuaCairoPath::LuaCairoPath(lua_State *L) :
|
||||
LuaCairoBase(L)
|
||||
{
|
||||
RegPathCallables(L);
|
||||
|
||||
cairo_owns_memory = false;
|
||||
path = (cairo_path_t*)malloc(sizeof(cairo_path_t));
|
||||
path->status = CAIRO_STATUS_SUCCESS;
|
||||
path->num_data = 0;
|
||||
path->data = 0;
|
||||
EnsureSpaceFor(8);
|
||||
}
|
||||
|
||||
LuaCairoPath::LuaCairoPath(lua_State *L, cairo_path_t *_path) :
|
||||
LuaCairoBase(L)
|
||||
{
|
||||
CALLABLE_REG(map);
|
||||
CALLABLE_REG(map_coords);
|
||||
CALLABLE_REG(fold);
|
||||
CALLABLE_REG(fold_coords);
|
||||
RegPathCallables(L);
|
||||
|
||||
// We always own the given path object
|
||||
cairo_owns_memory = true;
|
||||
path = _path;
|
||||
}
|
||||
|
||||
LuaCairoPath::~LuaCairoPath()
|
||||
{
|
||||
cairo_path_destroy(path);
|
||||
if (cairo_owns_memory)
|
||||
cairo_path_destroy(path);
|
||||
else {
|
||||
free(path->data);
|
||||
free(path);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
// Pattern (cairo_pattern_t)
|
||||
|
||||
CALLABLE_IMPL(LuaCairoPattern, add_color_stop_rgb)
|
||||
{
|
||||
LuaCairoPattern *pat = GetObjPointer(L, lua_upvalueindex(1));
|
||||
|
|
@ -2427,6 +2716,8 @@ LuaCairoPattern::~LuaCairoPattern()
|
|||
}
|
||||
|
||||
|
||||
// Lua registration
|
||||
|
||||
static const luaL_Reg cairolib[] = {
|
||||
{"image_surface_create", LuaCairoSurface::lua_image_surface_create},
|
||||
{"font_options_create", LuaCairoFontOptions::lua_create},
|
||||
|
|
|
|||
|
|
@ -467,9 +467,6 @@ private:
|
|||
protected:
|
||||
const char *GetTypeName();
|
||||
|
||||
// Extend the meta table with an equality operator
|
||||
void CreateMetaTable(lua_State *L);
|
||||
|
||||
public:
|
||||
// Create a new font options object - will be owned
|
||||
LuaCairoFontOptions(lua_State *L);
|
||||
|
|
@ -519,7 +516,7 @@ private:
|
|||
// Not in Cairo API
|
||||
CALLABLE(copy);
|
||||
|
||||
void RegMatrixCallables();
|
||||
void RegMatrixCallables(lua_State *L);
|
||||
|
||||
protected:
|
||||
virtual int internal_lua_index(lua_State *L);
|
||||
|
|
@ -548,27 +545,56 @@ class LuaCairoPath : public LuaCairoBase<LuaCairoPath> {
|
|||
private:
|
||||
cairo_path_t *path;
|
||||
|
||||
// Specifies whether the memory for the cairo_path_t object is owned by the Cairo library.
|
||||
// If Cairo owns it we cannot add/remove elements from the path.
|
||||
bool cairo_owns_memory;
|
||||
|
||||
// Number of path elemts we have allocated memory for. Undefined if cairo_owns_memory.
|
||||
// This is different from path->length because that specifies the number of elements in use.
|
||||
size_t path_elements_allocated;
|
||||
|
||||
// Management
|
||||
void EnsurePathOwned(); // ensure that we own the path memory
|
||||
void EnsureSpaceFor(size_t n); // ensure we own the path memory and there's space to add at least n more elements
|
||||
|
||||
// TODO: figure out what methods are needed
|
||||
// Something to iterate over the parts at least
|
||||
// Support for creating/modifying paths?
|
||||
|
||||
CALLABLE(clear);
|
||||
CALLABLE(move_to);
|
||||
CALLABLE(line_to);
|
||||
CALLABLE(curve_to);
|
||||
CALLABLE(close);
|
||||
|
||||
// Functional programming support
|
||||
CALLABLE(map); // transform each path segment with a function
|
||||
CALLABLE(map_coords); // transform each coordinate pair with a function
|
||||
CALLABLE(fold); // fold path segments into a single result value
|
||||
CALLABLE(fold_coords); // fold coordinate pairs into a single result value
|
||||
|
||||
void RegPathCallables(lua_State *L);
|
||||
|
||||
protected:
|
||||
virtual int internal_lua_index(lua_State *L);
|
||||
const char *GetTypeName();
|
||||
|
||||
public:
|
||||
// Create object based on path - does not copy path, but it will be implicitly owned
|
||||
// Create object with new path - we will own the memory
|
||||
LuaCairoPath(lua_State *L);
|
||||
// Create object based on path - does not copy path, and lets Cairo own the memory
|
||||
LuaCairoPath(lua_State *L, cairo_path_t *_path);
|
||||
// Destructor
|
||||
virtual ~LuaCairoPath();
|
||||
|
||||
cairo_path_t *GetPath() { return path; }
|
||||
|
||||
// Modifying the path
|
||||
void ClearPath();
|
||||
void MoveTo(double x, double y);
|
||||
void LineTo(double x, double y);
|
||||
void CurveTo(double x0, double y0, double x1, double y1, double x2, double y2);
|
||||
void ClosePath();
|
||||
};
|
||||
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue