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add basic set of Cairo Lua bindings

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This commit is contained in:
Robin Gareus 2016-03-17 15:53:19 +01:00
parent 4e6895f156
commit ee2d88a5cc
2 changed files with 94 additions and 0 deletions
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93
gtk2_ardour/luainstance.cc
View File

@ -16,6 +16,8 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <cairomm/context.h>
#include "gtkmm2ext/gui_thread.h"
#include "ardour/audioengine.h"
@ -95,6 +97,96 @@ LuaInstance::register_hooks (lua_State* L)
.endNamespace ();
}
void
LuaInstance::bind_cairo (lua_State* L)
{
luabridge::getGlobalNamespace (L)
.beginNamespace ("Cairo")
.beginClass <Cairo::Context> ("Context")
.addFunction ("save", &Cairo::Context::save)
.addFunction ("restore", &Cairo::Context::restore)
.addFunction ("set_operator", &Cairo::Context::set_operator)
//.addFunction ("set_source", &Cairo::Context::set_operator) // needs RefPtr
.addFunction ("set_source_rgb", &Cairo::Context::set_source_rgb)
.addFunction ("set_source_rgba", &Cairo::Context::set_source_rgba)
.addFunction ("set_line_width", &Cairo::Context::set_line_width)
.addFunction ("set_line_cap", &Cairo::Context::set_line_cap)
.addFunction ("set_line_join", &Cairo::Context::set_line_join)
.addFunction ("set_dash", (void (Cairo::Context::*)(std::vector<double>&, double))&Cairo::Context::set_dash)
.addFunction ("unset_dash", &Cairo::Context::unset_dash)
.addFunction ("translate", &Cairo::Context::translate)
.addFunction ("scale", &Cairo::Context::scale)
.addFunction ("rotate", &Cairo::Context::rotate)
.addFunction ("begin_new_path", &Cairo::Context::begin_new_path)
.addFunction ("begin_new_sub_path", &Cairo::Context::begin_new_sub_path)
.addFunction ("move_to", &Cairo::Context::move_to)
.addFunction ("line_to", &Cairo::Context::line_to)
.addFunction ("curve_to", &Cairo::Context::curve_to)
.addFunction ("arc", &Cairo::Context::arc)
.addFunction ("arc_negative", &Cairo::Context::arc_negative)
.addFunction ("rel_move_to", &Cairo::Context::rel_move_to)
.addFunction ("rel_line_to", &Cairo::Context::rel_line_to)
.addFunction ("rel_curve_to", &Cairo::Context::rel_curve_to)
.addFunction ("rectangle", (void (Cairo::Context::*)(double, double, double, double))&Cairo::Context::rectangle)
.addFunction ("close_path", &Cairo::Context::close_path)
.addFunction ("paint", &Cairo::Context::paint)
.addFunction ("paint_with_alpha", &Cairo::Context::paint_with_alpha)
.addFunction ("stroke", &Cairo::Context::stroke)
.addFunction ("stroke_preserve", &Cairo::Context::stroke_preserve)
.addFunction ("fill", &Cairo::Context::fill)
.addFunction ("fill_preserve", &Cairo::Context::fill_preserve)
.addFunction ("reset_clip", &Cairo::Context::reset_clip)
.addFunction ("clip", &Cairo::Context::clip)
.addFunction ("clip_preserve", &Cairo::Context::clip_preserve)
.addFunction ("set_font_size", &Cairo::Context::set_font_size)
.addFunction ("show_text", &Cairo::Context::show_text)
.endClass ()
/* enums */
// LineCap, LineJoin, Operator
.beginNamespace ("LineCap")
.addConst ("Butt", CAIRO_LINE_CAP_BUTT)
.addConst ("Round", CAIRO_LINE_CAP_ROUND)
.addConst ("Square", CAIRO_LINE_CAP_SQUARE)
.endNamespace ()
.beginNamespace ("LineJoin")
.addConst ("Miter", CAIRO_LINE_JOIN_MITER)
.addConst ("Round", CAIRO_LINE_JOIN_ROUND)
.addConst ("Bevel", CAIRO_LINE_JOIN_BEVEL)
.endNamespace ()
.beginNamespace ("Operator")
.addConst ("Clear", CAIRO_OPERATOR_CLEAR)
.addConst ("Source", CAIRO_OPERATOR_SOURCE)
.addConst ("Over", CAIRO_OPERATOR_OVER)
.addConst ("Add", CAIRO_OPERATOR_ADD)
.endNamespace ()
.endNamespace ();
/* Lua/cairo bindings operate on Cairo::Context, there is no Cairo::RefPtr wrapper [yet].
one can work around this as follows:
LuaState lua;
LuaInstance::register_classes (lua.getState());
lua.do_command (
"function render (ctx)"
" ctx:rectangle (0, 0, 100, 100)"
" ctx:set_source_rgba (0.1, 1.0, 0.1, 1.0)"
" ctx:fill ()"
" end"
);
{
Cairo::RefPtr<Cairo::Context> context = get_window ()->create_cairo_context ();
Cairo::Context ctx (context->cobj ());
luabridge::LuaRef lua_render = luabridge::getGlobal (lua.getState(), "render");
lua_render ((Cairo::Context *)&ctx);
}
*/
}
void
LuaInstance::register_classes (lua_State* L)
{
@ -102,6 +194,7 @@ LuaInstance::register_classes (lua_State* L)
LuaBindings::common (L);
LuaBindings::session (L);
bind_cairo (L);
register_hooks (L);
luabridge::getGlobalNamespace (L)

1
gtk2_ardour/luainstance.h
View File

@ -79,6 +79,7 @@ public:
static void register_classes (lua_State* L);
static void register_hooks (lua_State* L);
static void bind_cairo (lua_State* L);
void set_session (ARDOUR::Session* s);