remove cancel from defer, add buffer_view overload for create_shader function

headers/enduro2d/core/render.hpp

@@ -906,6 +906,10 @@ namespace e2d
         shader_ptr create_shader(
             str_view vertex_source,
             str_view fragment_source);
+        
+        shader_ptr create_shader(
+            buffer_view vertex_source,
+            buffer_view fragment_source);
 
         shader_ptr create_shader(
             const input_stream_uptr& vertex_stream,

headers/enduro2d/utils/defer.hpp

@@ -19,17 +19,10 @@ namespace e2d
             : f_(std::move(f)) {}
 
             ~defer_impl() noexcept(std::is_nothrow_invocable_v<F>) {
-                if ( !cancelled_ ) {
-                    f_();
-                }
-            }
-
-            void cancel() noexcept {
-                cancelled_ = true;
+                f_();
             }
         private:
             F f_;
-            bool cancelled_{false};
         };
     }
 

sources/enduro2d/core/render_impl/render_none.cpp

@@ -180,6 +180,14 @@ namespace e2d
         return nullptr;
     }
 
+    shader_ptr render::create_shader(
+        buffer_view vertex_source,
+        buffer_view fragment_source)
+    {
+        E2D_UNUSED(vertex_source, fragment_source);
+        return nullptr;
+    }
+
     shader_ptr render::create_shader(
         const input_stream_uptr& vertex_stream,
         const input_stream_uptr& fragment_stream)

sources/enduro2d/core/render_impl/render_opengl.cpp

@@ -531,6 +531,17 @@ namespace e2d
                 state_->dbg(), std::move(ps)));
     }
 
+    shader_ptr render::create_shader(
+        buffer_view vertex_source,
+        buffer_view fragment_source)
+    {
+        E2D_ASSERT(is_in_main_thread());
+
+        return create_shader(
+            str_view(reinterpret_cast<const char*>(vertex_source.data()), vertex_source.size()),
+            str_view(reinterpret_cast<const char*>(fragment_source.data()), fragment_source.size()));
+    }
+
     shader_ptr render::create_shader(
         const input_stream_uptr& vertex,
         const input_stream_uptr& fragment)

untests/sources/untests_utils/buffer.cpp

@@ -221,10 +221,10 @@ TEST_CASE("buffer_view") {
         REQUIRE(v5.data() == b2.data());
         REQUIRE(v5.size() == 20);
 
-        str32 b3 = make_utf32("hello");
+        u32 b3[3] = {10, 20, 30};
         buffer_view v6(b3);
-        REQUIRE(v6.data() == b3.data());
-        REQUIRE(v6.size() == 20);
+        REQUIRE(v6.data() == &b3[0]);
+        REQUIRE(v6.size() == 12);
     }
     {
         const char* s0 = "hell";