From 42c9fac38ef33cb9688796a17e8a1bafd6c7f645 Mon Sep 17 00:00:00 2001
From: Hartmut Seichter <hartmut@technotecture.com>
Date: Sun, 24 Jan 2021 21:54:29 +0100
Subject: [PATCH] WiP

---
 src/binding/src/script_core.cpp          | 33 +++++++++++++++++++++++-
 src/binding/src/script_system.cpp        |  1 +
 src/binding/src/script_visual.cpp        |  7 +++++
 src/core/include/pw/core/rectangle.hpp   | 25 ++++++++++++------
 src/scripts/demos/simple_002.lua         |  8 +++++-
 src/visual/CMakeLists.txt                |  3 ++-
 src/visual/include/pw/visual/context.hpp |  5 +++-
 src/visual/src/context.cpp               | 21 ++++++++++++---
 src/visual/src/texture.cpp               |  2 --
 9 files changed, 87 insertions(+), 18 deletions(-)

diff --git a/src/binding/src/script_core.cpp b/src/binding/src/script_core.cpp
index f7c4f9a..ae9db28 100644
--- a/src/binding/src/script_core.cpp
+++ b/src/binding/src/script_core.cpp
@@ -8,6 +8,7 @@
 #include "pw/core/geometry.hpp"
 #include "pw/core/image.hpp"
 #include "pw/core/matrix_transform.hpp"
+#include "pw/core/rectangle.hpp"
 
 #include "runtime_lua.hpp"
 
@@ -18,11 +19,30 @@ template <> struct is_automagical<pw::matrix4x4> : std::false_type {};
 template <> struct is_automagical<pw::vector3> : std::false_type {};
 template <> struct is_automagical<pw::vector4> : std::false_type {};
 template <> struct is_automagical<pw::quaternion> : std::false_type {};
+template <> struct is_automagical<pw::rectangle> : std::false_type {};
 }
 
 namespace pw {
 
-void register_core_function(sol::state& lua,sol::table& ns)
+
+rectangle from_lua_table(sol::table t)
+{
+    float v[4];
+
+    for (std::size_t i {1}; i <= t.size();i++){
+        v[i-1] = t[i];
+    }
+    return rectangle(v);
+}
+
+vector3 vector3_from_lua_table(sol::table t)
+{
+
+    return vector3();
+}
+
+
+void register_core_function(sol::state&,sol::table& ns)
 {
 
     typedef real_t Scalar;
@@ -93,8 +113,15 @@ void register_core_function(sol::state& lua,sol::table& ns)
                           , sol::constructors<size(),size(Scalar,Scalar)>()
                           , "width",&size::width
                           , "height",&size::height
+                          , "cast_to_float",&size::cast<float>
                           );
 
+    ns.new_usertype<sizef>("sizef"
+                          , sol::constructors<sizef(),sizef(Scalar,Scalar)>()
+                          , "width",&sizef::width
+                          , "height",&sizef::height
+                          , "cast_to_int",&sizef::cast<int>
+                          );
 
     ns.new_usertype<point>("point",
                            sol::constructors<point(),point(Scalar,Scalar)>(),
@@ -154,6 +181,10 @@ void register_core_function(sol::state& lua,sol::table& ns)
                                              ,"gray", image::LUM);
 
 
+    ns.new_usertype<rectangle>("rectangle"
+            ,sol::constructors<rectangle(),rectangle(const point_<float>&,const size_<float>&)>()
+            );
+
     auto mathf_table = ns.create_named("mathf");
     mathf_table.set_function("ping_pong",ping_pong<real_t>);
 
diff --git a/src/binding/src/script_system.cpp b/src/binding/src/script_system.cpp
index 411d68c..8c12cf8 100644
--- a/src/binding/src/script_system.cpp
+++ b/src/binding/src/script_system.cpp
@@ -45,6 +45,7 @@ void register_system_function(sol::state&, sol::table &ns)
                           ,"new", sol::no_constructor
                           ,"get",&path::get
                           ,"separator",sol::readonly_property(&path::separator)
+                          ,"resource_paths",sol::readonly_property(&path::resource_paths)
                           ,"executable_path",sol::readonly_property(&path::executable_path)
                           );
 }
diff --git a/src/binding/src/script_visual.cpp b/src/binding/src/script_visual.cpp
index d8ec985..39bcf85 100644
--- a/src/binding/src/script_visual.cpp
+++ b/src/binding/src/script_visual.cpp
@@ -4,6 +4,7 @@
 #include "pw/visual/shader.hpp"
 #include "pw/visual/framebuffer.hpp"
 #include "pw/visual/texture.hpp"
+#include "pw/visual/context.hpp"
 
 #include "pw/core/size.hpp"
 
@@ -62,6 +63,12 @@ void register_visual_function(sol::state&,sol::table &ns)
                              ,sol::constructors<texture(),texture(texture::image_ref,texture::data_layout)>()
                              ,"image",sol::property(&texture::set_image,&texture::image)
                              );
+
+    ns.new_usertype<context>("context"
+                             ,sol::constructors<context()>()
+                             ,"clear",&context::clear
+                             ,"set_viewport",&context::set_viewport
+                             );
 }
 
 PW_REGISTER_LUA(visual)
diff --git a/src/core/include/pw/core/rectangle.hpp b/src/core/include/pw/core/rectangle.hpp
index 700a183..96eef21 100644
--- a/src/core/include/pw/core/rectangle.hpp
+++ b/src/core/include/pw/core/rectangle.hpp
@@ -20,8 +20,8 @@
  * SOFTWARE.
  *
  */
-#ifndef PW_CORE_RECT_HPP
-#define PW_CORE_RECT_HPP
+#ifndef PW_CORE_RECTANGLE_HPP
+#define PW_CORE_RECTANGLE_HPP
 
 #include <initializer_list>
 
@@ -38,10 +38,16 @@ struct rectangle_ {
 
     rectangle_() = default;
 
-    rectangle_(const T_(&l)[4])
+    rectangle_(const T_ l[4])
+        : position(point_<T_>(l[0],l[1]))
+        , size(size_<T_>(l[2],l[3]))
+    {
+    }
+
+    rectangle_(const T_(&l)[4])
+        : position(point_<T_>(l[0],l[1]))
+        , size(size_<T_>(l[2],l[3]))
     {
-        position.x = l[0]; position.y = l[1];
-        size.width = l[2]; size.height = l[3];
     }
 
     rectangle_(point_<T_> const & p,size_<T_> const & s) : size(s), position(p) {}
@@ -53,11 +59,14 @@ struct rectangle_ {
     }
 
     template <typename To_>
-    rectangle_<To_> cast() const { return rectangle_<To_>(position.template cast<To_>(),size.template cast<To_>()); }
-
+    rectangle_<To_> cast() const
+    {
+        return rectangle_<To_>(position.template cast<To_>(),size.template cast<To_>());
+    }
 };
 
-using rectangle = rectangle_<real_t>;
+using rectangle  = rectangle_<real_t>;
+using rectanglei = rectangle_<int>;
 using rectanglef = rectangle_<float>;
 using rectangled = rectangle_<double>;
 
diff --git a/src/scripts/demos/simple_002.lua b/src/scripts/demos/simple_002.lua
index 39343ee..446cb61 100644
--- a/src/scripts/demos/simple_002.lua
+++ b/src/scripts/demos/simple_002.lua
@@ -6,6 +6,8 @@
 pw.script:load_all()
 
 
+print(pw.path.get().executable_path)
+
 -- create a window (remember windows are invisible by default)
 local w = pw.window.new()
 
@@ -90,16 +92,20 @@ end
 local cam_pos = pw.vector3:new(0,0,0)
 
 
+local ctx = pw.context:new()
+
 w.on_resize = function(self)
     -- use client_size to resize the viewport
-    print(self.client_size.width,self.client_size.height)
+    ctx:set_viewport(pw.rectangle:new(pw.point:new(0,0),self.client_size:cast_to_float()))
 end
 
+
 -- setup a lua callback function as callback
 w.on_update = function(self)
 
     -- set identity on model matrix
     mm:set_identity()
+
     -- set view matrix with look_at
     mv = pw.matrixtransform.look_at(cam_pos,pw.vector3.forward(),pw.vector3.up())
 
diff --git a/src/visual/CMakeLists.txt b/src/visual/CMakeLists.txt
index b9c870f..1294b8f 100644
--- a/src/visual/CMakeLists.txt
+++ b/src/visual/CMakeLists.txt
@@ -1,5 +1,6 @@
 
 set(hdrs
+    include/pw/visual/context.hpp
     include/pw/visual/framebuffer.hpp
     include/pw/visual/shader.hpp
     include/pw/visual/pipeline.hpp
@@ -8,9 +9,9 @@ set(hdrs
     )
 
 set(srcs
+    src/context.cpp
     src/framebuffer.cpp
     src/shader.cpp
-    src/context.cpp
     src/pass.cpp
     src/pipeline.cpp
     src/target.cpp
diff --git a/src/visual/include/pw/visual/context.hpp b/src/visual/include/pw/visual/context.hpp
index 6d5c9eb..e0620c4 100644
--- a/src/visual/include/pw/visual/context.hpp
+++ b/src/visual/include/pw/visual/context.hpp
@@ -27,6 +27,7 @@
 #include <pw/core/point.hpp>
 #include <pw/core/size.hpp>
 #include <pw/core/vector.hpp>
+#include <pw/core/rectangle.hpp>
 
 
 namespace pw {
@@ -40,7 +41,9 @@ public:
     void set_blend();
     void set_depth();
 
-    void set_viewport(point const &p, size const &s);
+    void set_viewport(const rectangle& v);
+    rectangle viewport() const;
+
     size viewport_size() const;
     point viewport_origin() const;
 
diff --git a/src/visual/src/context.cpp b/src/visual/src/context.cpp
index b816aea..38d3ffc 100644
--- a/src/visual/src/context.cpp
+++ b/src/visual/src/context.cpp
@@ -6,9 +6,17 @@
 namespace pw {
 
 struct context::impl {
-    void set_viewport(const point &p, const size &s)
+
+    void set_viewport(const rectangle& v)
     {
-        glViewport(p.x,p.y,s.width,s.height);
+        glViewport(v.position.x,v.position.y,v.size.width,v.size.height);
+    }
+
+    const rectangle viewport()
+    {
+        float _viewport[4] = {0,0,1,1};
+        glGetFloatv(GL_VIEWPORT,&_viewport[0]);
+        return rectangle(_viewport);
     }
 
     void clear()
@@ -31,9 +39,14 @@ void context::set_blend()
 
 }
 
-void context::set_viewport(const point &p, const size &s)
+void context::set_viewport(const rectangle& v)
 {
-    _impl->set_viewport(p,s);
+    _impl->set_viewport(v);
+}
+
+rectangle context::viewport() const
+{
+    return _impl->viewport();
 }
 
 void context::clear()
diff --git a/src/visual/src/texture.cpp b/src/visual/src/texture.cpp
index 34a12e2..dbff643 100644
--- a/src/visual/src/texture.cpp
+++ b/src/visual/src/texture.cpp
@@ -136,7 +136,6 @@ void texture::set_wrap(wrap_mode w)
 	_wrap = w;
 }
 
-
 uint32_t texture::native_handle() const
 {
 	return _impl->_texture_id;
@@ -147,5 +146,4 @@ uint32_t texture::native_sampler_handle() const
 	return _impl->_texture_sampler;
 }
 
-
 }