1 files changed, 29 insertions, 1 deletions
diff --git a/src/RenderBackend/OpenGL/ShaderFrame.cpp b/src/RenderBackend/OpenGL/ShaderFrame.cpp
index 3f7ff01..dc2653c 100644
--- a/src/RenderBackend/OpenGL/ShaderFrame.cpp
+++ b/src/RenderBackend/OpenGL/ShaderFrame.cpp
@@ -7,7 +7,22 @@ namespace amalgine {
     }
     
     ShaderFrame::~ShaderFrame() {
-        glDeleteVertexArrays(1, &vertex_array_object_id);
+        if(vertex_array_object_id != -1)
+            glDeleteVertexArrays(1, &vertex_array_object_id);
+    }
+
+    ShaderFrame::ShaderFrame(ShaderFrame &&other) {
+        this->operator=(std::move(other));
+    }
+
+    ShaderFrame& ShaderFrame::operator=(ShaderFrame &&other) {
+        shader_program_id = other.shader_program_id;
+        vertex_array_object_id = other.vertex_array_object_id;
+        shader_inputs = std::move(other.shader_inputs);
+
+        other.shader_program_id = -1;
+        other.vertex_array_object_id = -1;
+        return *this;
     }
 
     DeviceMemory* ShaderFrame::get_input_by_name(const char *name) {
@@ -44,10 +59,23 @@ namespace amalgine {
         glUseProgram(shader_program_id);
         glBindVertexArray(vertex_array_object_id); // Set the active shader to use the data encapsulated by the vertex array object
         // TODO: Cache this num_vertices count (and reset it when device memory has changed)
+#if 0
         int num_vertices = 0;
         for(const auto &it : shader_inputs) {
             num_vertices = std::max(num_vertices, it.second->get_num_vertices());
         }
+#endif
+        int num_vertices = 0;
+        for(const auto &it : shader_inputs) {
+            int new_num_vertices = std::max(num_vertices, it.second->get_num_vertices());
+#if 0
+            if(num_vertices != 0 && new_num_vertices != num_vertices) {
+                fprintf(stderr, "All inputs for shaders need to be of the same size!\n");
+                abort();
+            }
+#endif
+            num_vertices = new_num_vertices;
+        }
         // TODO: Allow specifying mode different than GL_TRIANGLES
         glDrawArrays(GL_TRIANGLES, 0, num_vertices);
     }