Update the shadersui to allow runtime shader editing

Author: gwaldron

src/osgEarth/ImGui/ShaderGUI

@@ -20,18 +20,21 @@
 #define OSGEARTH_IMGUI_SHADER_GUI
 
 #include "ImGui"
-#include <osgEarth/Threading>
+#include <osgEarth/Registry>
+#include <osgEarth/VirtualProgram>
 #include <osg/Uniform>
 #include <osg/StateSet>
 #include <chrono>
 #include <list>
+#include <vector>
 
 namespace osgEarth
 {
     namespace GUI
     {
         using namespace osgEarth;
         using namespace osgEarth::Threading;
+        using namespace osgEarth::Util;
 
         class ShaderGUI : public BaseGUI
         {
@@ -49,6 +52,8 @@ namespace osgEarth
             };
             std::vector<DefineSpec> _defines;
 
+            ProgramRepo::ProgramMap _db;
+
         public:
             ShaderGUI(osg::ArgumentParser* args) : BaseGUI("Shaders")
             {
@@ -117,6 +122,49 @@ namespace osgEarth
                                 ri.getCurrentCamera()->getOrCreateStateSet()->setDefine(def._name, osg::StateAttribute::OFF | osg::StateAttribute::OVERRIDE);
                         }
                     }
+
+                    ImGui::Separator();
+                    ImGui::TextColored(ImVec4(1, 1, 0, 1), "Programs:");
+
+                    if (ImGui::Button("Reload"))
+                    {
+                        _db = Registry::programRepo().copy();
+                    }
+                    
+                    for (auto& entry : _db)
+                    {
+                        if (entry.second->_users.size() > 0)
+                        {
+                            auto program = entry.second->_program;
+                            auto name = program->getName();
+                            if (name.empty()) name = "[no name]";
+                            if (ImGui::TreeNode(name.c_str()))
+                            {
+                                auto num = program->getNumShaders();
+                                for (unsigned i = 0; i < num; ++i)
+                                {
+                                    auto shader = program->getShader(i);
+                                    auto shader_name = shader->getName();
+                                    if (shader_name.empty()) shader_name = "[no name]";
+                                    if (ImGui::TreeNode(shader->getName().c_str()))
+                                    {
+                                        if (ImGui::Button("Compile"))
+                                        {
+                                            program->releaseGLObjects(nullptr);
+                                        }
+                                        auto text = shader->getShaderSource();
+                                        if (ImGuiUtil::InputTextMultiline("##shader_source", &text, ImVec2(-1, -1)))
+                                        {
+                                            shader->setShaderSource(text);
+                                            program->releaseGLObjects(nullptr);
+                                        }
+                                        ImGui::TreePop();
+                                    }
+                                }
+                                ImGui::TreePop();
+                            }
+                        }
+                    }
                 }
                 ImGui::End();
             }

src/osgEarth/ImGui/ViewpointsGUI

@@ -66,8 +66,8 @@ namespace osgEarth {
                             {
                                 _viewpoints.push_back(Viewpoint(j));
 
-#if 0 // works, but conflicts with the ViewpointsExtension :)
-                                if (key < 9)
+                                // warning, if viewpoints:map_keys == true, this will conflict.
+                                if (false) //key < 9)
                                 {
                                     EventRouter::get(view(ri)).onKeyPress(
                                         (osgGA::GUIEventAdapter::KeySymbol)((int)osgGA::GUIEventAdapter::KEY_1 + key),
@@ -78,7 +78,6 @@ namespace osgEarth {
                                         });
                                     key++;
                                 }
-#endif
                             }
                         }
                     }

src/osgEarth/VirtualProgram

@@ -37,7 +37,7 @@ namespace osgEarth
 {
     namespace Util
     {
-        class /*internal*/ ProgramRepo : public Threading::Mutexed<osg::Referenced>
+        class OSGEARTH_EXPORT ProgramRepo : public Threading::Mutexed<osg::Referenced>
         {
         public:
             // Program key (must be sorted set)
@@ -92,6 +92,13 @@ namespace osgEarth
 
             ~ProgramRepo();
 
+            ProgramMap copy() const {
+                lock();
+                auto result = _db;
+                unlock();
+                return result;
+            }
+
         private:
             mutable ProgramMap _db;
             bool _releaseUnusedPrograms;