Fixed Shader Editor menu and behavior

Only Clones with ImageFilter of custom type are linked to UI for ShaderEditor. New menu to try presets of shader code. Link to ShaderToy website.

ImageFilter.cpp

@@ -63,42 +63,28 @@ std::string fragmentFooter = "void main() {\n"
                              "    mainImage( FragColor, texcoord.xy * iResolution.xy );\n"
                              "}\n";
 
-//std::string fragmentFooter = "void main() {\n"
-//                             "    iChannelResolution[0] = vec3(textureSize(iChannel0, 0), 0.f);\n"
-//                             "    iChannelResolution[1] = vec3(textureSize(iChannel1, 0), 0.f);\n"
-//                             "    vec4 texcoord = iTransform * vec4(vertexUV.x, vertexUV.y, 0.0, 1.0);\n"
-//                             "    vec4 filtered;\n"
-//                             "    mainImage( filtered, texcoord.xy * iChannelResolution[0].xy );\n"
-//                             "    vec3 RGB = filtered.rgb * vertexColor.rgb * color.rgb;\n"
-//                             "    float maskIntensity = dot(texture(iChannel1, vertexUV).rgb, vec3(1.0/3.0));\n"
-//                             "    float A = clamp(filtered.a * vertexColor.a * color.a * maskIntensity, 0.0, 1.0);\n"
-//                             "    FragColor = vec4(RGB * A, A);\n"
-//                             "} \n";
-
-
 std::list< FilteringProgram > FilteringProgram::presets = {
     FilteringProgram(),
     FilteringProgram("Bilateral","shaders/filters/bilinear.glsl",   "",     { }),
-    FilteringProgram("Pixelate", "shaders/filters/pixelate.glsl",   "",     { { "Size", 0.5}, { "Sharpen", 0.5} }),
+    FilteringProgram("Pixelate", "shaders/filters/pixelate.glsl",   "",     { }),
-    FilteringProgram("Bloom",    "shaders/filters/bloom.glsl",      "",     { { "Intensity", 0.5} }),
+    FilteringProgram("Bloom",    "shaders/filters/bloom.glsl",      "",     { }),
-    FilteringProgram("Bokeh",    "shaders/filters/bokeh.glsl",      "",     { { "Radius", 1.0} }),
+    FilteringProgram("Bokeh",    "shaders/filters/bokeh.glsl",      "",     { }),
-    FilteringProgram("Chalk",    "shaders/filters/talk.glsl",       "",     { { "Factor", 1.0} }),
+    FilteringProgram("Talk",     "shaders/filters/talk.glsl",       "",     { }),
-    FilteringProgram("Stippling","shaders/filters/stippling.glsl",  "",     { { "Factor", 0.5} }),
+    FilteringProgram("Stippling","shaders/filters/stippling.glsl",  "",     { }),
-    FilteringProgram("Dithering","shaders/filters/dithering.glsl",  "",     { { "Factor", 0.5} }),
+    FilteringProgram("Dithering","shaders/filters/dithering.glsl",  "",     { }),
-    FilteringProgram("Fisheye",  "shaders/filters/fisheye.glsl",    "",     { { "Factor", 0.35} }),
+    FilteringProgram("Fisheye",  "shaders/filters/fisheye.glsl",    "",     { })
 };
 
 
-
 std::string FilteringProgram::getFilterCodeInputs()
 {
     static std::string filterHeaderHelp =  "vec3      iResolution;           // viewport resolution (in pixels)\n"
                                            "float     iTime;                 // shader playback time (in seconds)\n"
                                            "float     iTimeDelta;            // render time (in seconds)\n"
                                            "int       iFrame;                // shader playback frame\n"
-                                           "vec3      iChannelResolution[2]; // input channel resolution (in pixels)\n"
+                                           "vec3      iChannelResolution[2]; // input channels resolution (in pixels)\n"
-                                           "sampler2D iChannel0;             // input channel (texture).\n"
+                                           "sampler2D iChannel0;             // input channel 0 (texture).\n"
-                                           "sampler2D iChannel1;             // input channel (mask).\n"
+                                           "sampler2D iChannel1;             // input channel 1 (texture).\n"
                                            "vec4      iDate;                 // (year, month, day, time in seconds)";
     return filterHeaderHelp;
 }
@@ -114,7 +100,7 @@ std::string FilteringProgram::getFilterCodeDefault()
 ///                                 ////
 ////////////////////////////////////////
 
-FilteringProgram::FilteringProgram() : name_("None"), code_({"shaders/filters/default.glsl",""}), two_pass_filter_(false)
+FilteringProgram::FilteringProgram() : name_("Default"), code_({"shaders/filters/default.glsl",""}), two_pass_filter_(false)
 {
 
 }

UserInterfaceManager.cpp

@@ -5329,6 +5329,7 @@ void ShaderEditor::refresh(CloneSource *cs)
         filters_.erase(current_);
         current_ = nullptr;
     }
+
 }
 
 void ShaderEditor::Render()
@@ -5353,35 +5354,49 @@ void ShaderEditor::Render()
             Settings::application.widget.shader_editor = false;
         if (ImGui::BeginMenu(IMGUI_TITLE_SHADEREDITOR))
         {
-            if (ImGui::MenuItem( ICON_FA_SYNC " Reload")) {
+            if (ImGui::MenuItem( ICON_FA_SYNC "  Reload", nullptr, nullptr, current_ != nullptr)) {
                 if ( current_ != nullptr )
                     filters_.erase(current_);
+                // force reload
                 current_ = nullptr;
             }
 
+            // Menu section for presets
+            if (ImGui::BeginMenu( ICON_FA_SCROLL " Example code", current_ != nullptr))
+            {
+                for (auto p = FilteringProgram::presets.begin(); p != FilteringProgram::presets.end(); ++p){
+
+                    if (ImGui::MenuItem( p->name().c_str() )) {
+                        ImageFilter *i = dynamic_cast<ImageFilter *>( current_->filter() );
+                        // if we can access the code of inside the image filter
+                        if (i) {
+                            // change the filter of the current image filter
+                            // => this triggers compilation of shader
+                            compilation_ = new std::promise<std::string>();
+                            i->setProgram( *p, compilation_ );
+                            compilation_return_ = compilation_->get_future();
+                            // inform status
+                            status_ = "Building...";
+                            // force reload
+                            current_ = nullptr;
+                        }
+                    }
+
+                }
+
+                ImGui::EndMenu();
+            }
+
+            if (ImGui::MenuItem( ICON_FA_EXTERNAL_LINK_ALT "  Browse shadertoy.com")) {
+                SystemToolkit::open("https://www.shadertoy.com/");
+            }
+
             // Enable/Disable editor options
             ImGui::Separator();
             ImGui::MenuItem( ICON_FA_UNDERLINE "  Show Shader Inputs", nullptr, &show_shader_inputs_);
             if (ImGui::MenuItem( ICON_FA_LONG_ARROW_ALT_RIGHT "  Show whitespace", nullptr, &ws))
                 _editor.SetShowWhitespaces(ws);
 
-            // Edit menu
-            ImGui::Separator();
-            if (ImGui::MenuItem( MENU_UNDO, SHORTCUT_UNDO, nullptr, !ro && _editor.CanUndo()))
-                _editor.Undo();
-            if (ImGui::MenuItem( MENU_REDO, SHORTCUT_REDO, nullptr, !ro && _editor.CanRedo()))
-                _editor.Redo();
-            if (ImGui::MenuItem( MENU_COPY, SHORTCUT_COPY, nullptr, _editor.HasSelection()))
-                _editor.Copy();
-            if (ImGui::MenuItem( MENU_CUT, SHORTCUT_CUT, nullptr, !ro && _editor.HasSelection()))
-                _editor.Cut();
-            if (ImGui::MenuItem( MENU_DELETE, SHORTCUT_DELETE, nullptr, !ro && _editor.HasSelection()))
-                _editor.Delete();
-            if (ImGui::MenuItem( MENU_PASTE, SHORTCUT_PASTE, nullptr, !ro && ImGui::GetClipboardText() != nullptr))
-                _editor.Paste();
-            if (ImGui::MenuItem( MENU_SELECTALL, SHORTCUT_SELECTALL, nullptr, _editor.GetText().size() > 1 ))
-                _editor.SetSelection(TextEditor::Coordinates(), TextEditor::Coordinates(_editor.GetTotalLines(), 0));
-
             // output manager menu
             ImGui::Separator();
             bool pinned = Settings::application.widget.shader_editor_view == Settings::application.current_view;
@@ -5398,6 +5413,28 @@ void ShaderEditor::Render()
             ImGui::EndMenu();
         }
 
+        // Edit menu
+        if (ImGui::BeginMenu( "Edit", current_ != nullptr ) ) {
+
+            if (ImGui::MenuItem( MENU_UNDO, SHORTCUT_UNDO, nullptr, !ro && _editor.CanUndo()))
+                _editor.Undo();
+            if (ImGui::MenuItem( MENU_REDO, SHORTCUT_REDO, nullptr, !ro && _editor.CanRedo()))
+                _editor.Redo();
+            if (ImGui::MenuItem( MENU_COPY, SHORTCUT_COPY, nullptr, _editor.HasSelection()))
+                _editor.Copy();
+            if (ImGui::MenuItem( MENU_CUT, SHORTCUT_CUT, nullptr, !ro && _editor.HasSelection()))
+                _editor.Cut();
+            if (ImGui::MenuItem( MENU_DELETE, SHORTCUT_DELETE, nullptr, !ro && _editor.HasSelection()))
+                _editor.Delete();
+            if (ImGui::MenuItem( MENU_PASTE, SHORTCUT_PASTE, nullptr, !ro && ImGui::GetClipboardText() != nullptr))
+                _editor.Paste();
+            if (ImGui::MenuItem( MENU_SELECTALL, SHORTCUT_SELECTALL, nullptr, _editor.GetText().size() > 1 ))
+                _editor.SetSelection(TextEditor::Coordinates(), TextEditor::Coordinates(_editor.GetTotalLines(), 0));
+
+            ImGui::EndMenu();
+        }
+
+        // Build action menu
         if (ImGui::MenuItem( ICON_FA_HAMMER " Build", nullptr, nullptr, current_ != nullptr )) {
 
             // the UI has ref to code for this clone
@@ -5488,11 +5525,13 @@ void ShaderEditor::Render()
                         filters_[c] = i->program();
                     }
                 }
-                else
+                else {
-                    status_ = "No shader";
+                    status_ = "-";
+                    c = nullptr;
+                }
             }
             else
-                status_ = "No shader";
+                status_ = "-";
         }
         else
             status_ = "-";

rsc/shaders/filters/bloom.glsl

@@ -1,5 +1,5 @@
 // from https://www.shadertoy.com/view/Ms2Xz3
-uniform float Intensity;
+float Intensity = 0.6;
 
 vec4 BlurColor (in vec2 Coord, in sampler2D Tex, in float MipBias)
 {

rsc/shaders/filters/bokeh.glsl

@@ -6,7 +6,7 @@
 #define GOLDEN_ANGLE 2.39996323
 #define ITERATIONS 60
 
-uniform float Radius;
+float Radius = 0.3;
 
 mat2 rot = mat2(cos(GOLDEN_ANGLE), sin(GOLDEN_ANGLE), -sin(GOLDEN_ANGLE), cos(GOLDEN_ANGLE));
 

rsc/shaders/filters/dithering.glsl

@@ -1,4 +1,4 @@
-uniform float Factor;
+float Factor = 0.5;
 
 const float mult = 1.0 / 17.0;
 const mat4 adjustments = (mat4(

rsc/shaders/filters/fisheye.glsl

@@ -1,6 +1,6 @@
 // from https://www.shadertoy.com/view/4s2GRR
 // Inspired by http://stackoverflow.com/questions/6030814/add-fisheye-effect-to-images-at-runtime-using-opengl-es
-uniform float Factor;
+float Factor = 0.4;
 
 void mainImage( out vec4 fragColor, in vec2 fragCoord )
 {
@@ -26,6 +26,5 @@ void mainImage( out vec4 fragColor, in vec2 fragCoord )
     else uv = p;//no effect for power = 1.0
 
     // Second part of cheat for round effect, not elliptical
-    vec3 col = texture(iChannel0, vec2(uv.x, uv.y * prop)).xyz;
+    fragColor = texture(iChannel0, vec2(uv.x, uv.y * prop));
-    fragColor = vec4(col, 1.0);
 }

rsc/shaders/filters/pixelate.glsl

@@ -1,5 +1,5 @@
-uniform float Size;
+float Size = 0.5;
-uniform float Sharpen;
+float Sharpen = 0.5;
 
 const mat3 G = mat3( 0.0625, 0.125, 0.0625, 0.125, 0.25, 0.125, 0.0625, 0.125, 0.0625);
         

rsc/shaders/filters/stippling.glsl

@@ -1,4 +1,4 @@
-uniform float Factor;
+float Factor = 0.3;
 
 #define SEED1 -0.5775604999999985
 #define SEED2 6.440483302499992
@@ -49,5 +49,5 @@ void mainImage( out vec4 fragColor, in vec2 fragCoord )
     float c = mask(uv);
     c = float( f > mix( 0.6 * c, 1.4 * c, Factor) );
 
-    fragColor = vec4(c, c, c, 1.0);
+    fragColor = vec4(c, c, c, texture(iChannel0, fragCoord.xy / iResolution.xy).a );
 }

rsc/shaders/filters/talk.glsl

@@ -1,7 +1,7 @@
 // From https://www.shadertoy.com/view/XdfcWN
 // Created by inigo quilez - iq/2014
 // License Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
-uniform float Factor;
+float Factor = 0.5;
 
 vec2 hash( vec2 p ) {
     p = 2.0 * vec2(dot(p,vec2(127.1,311.7)), dot(p,vec2(269.5,183.3)));