chore: bring back support for pass commands

src/WallpaperEngine/Data/Dumpers/StringPrinter.cpp

@@ -265,16 +265,23 @@ void StringPrinter::printEffect (const Effect& effect) {
 
 void StringPrinter::printEffectPass (const EffectPass& effectPass) {
     if (effectPass.command.has_value ()) {
-        const auto& command = effectPass.command.value ();
+        this->m_out << "Command: " << (*effectPass.command == Command_Copy ? "copy" : "swap");
 
-        this->m_out << "Command: " << (command.command == Command_Copy ? "copy" : "swap");
+        if (effectPass.target.has_value () || effectPass.source.has_value ()) {
             this->lineEnd ();
-        this->m_out << "Source: " << command.source;
-        this->lineEnd ();
-        this->m_out << "Target: " << command.target;
-    } else {
+        }
+    }
+
     if (effectPass.target.has_value ()) {
         this->m_out << "Target: " << effectPass.target.value ();
+
+        if (effectPass.source.has_value ()) {
+            this->lineEnd ();
+        }
+    }
+
+    if (effectPass.source.has_value ()) {
+        this->m_out << "Source: " << effectPass.source.value ();
     }
 
     if (!effectPass.binds.empty ()) {
@@ -297,7 +304,8 @@ void StringPrinter::printEffectPass (const EffectPass& effectPass) {
         this->lineEnd ();
     }
 
-        this->printMaterial (*effectPass.material);
+    if (effectPass.material.has_value ()) {
+        this->printMaterial (**effectPass.material);
     }
 }
 

src/WallpaperEngine/Data/Model/Effect.h

@@ -14,24 +14,18 @@ struct FBO {
     std::string name;
     std::string format;
     float scale;
-};
-
-struct PassCommand {
-    /** The type of command to execute */
-    PassCommandType command;
-    /** The target of the command (where to draw to) */
-    std::string target;
-    /** The source of the command (where to draw from) */
-    std::string source;
+    bool unique;
 };
 
 struct EffectPass {
     /** The material to use for this effect's pass */
-    MaterialUniquePtr material;
+    std::optional<MaterialUniquePtr> material;
     /** Texture bindings for this effect's pass */
     TextureMap binds;
     /** The command this material executes (if specified) */
-    std::optional <PassCommand> command;
+    std::optional <PassCommandType> command;
+    /** The source this material renders from (if specified) */
+    std::optional <std::string> source;
     /** The target this material renders to (if specified) */
     std::optional <std::string> target;
 };

src/WallpaperEngine/Data/Parsers/EffectParser.cpp

@@ -52,27 +52,17 @@ std::vector <EffectPassUniquePtr> EffectParser::parseEffectPasses (const JSON& i
 
     for (const auto& cur : it) {
         const auto binds = cur.optional ("bind");
-        std::optional <PassCommand> command = std::nullopt;
+        const auto command = cur.optional ("command");
+        const auto material = cur.optional ("material");
 
-        if (cur.contains ("command")) {
-            command = {
-                .command = cur.require <std::string> ("command", "Material command must have a command") == "copy"
-                               ? Command_Copy
-                               : Command_Swap,
-                .target = cur.require <std::string> ("target", "Material command must have a target"),
-                .source = cur.require <std::string> ("source", "Material command must have a source"),
-            };
-        }
+        // TODO: CAN TARGET BE SET IF MATERIAL IS SET?
 
         result.push_back (std::make_unique <EffectPass> (EffectPass {
-            .material = MaterialParser::load (project, cur.require <std::string> ("material", "Effect pass must have a material")),
+            .material = material.has_value () ? MaterialParser::load (project, *material) : std::optional<MaterialUniquePtr> {},
             .binds = binds.has_value () ? parseBinds (binds.value ()) : std::map<int, std::string> {},
-            .command = command,
-            // target is a bit special: if the material is a command this will be nullopt
-            // and the actual target will be set in the command itself, otherwise it will
-            // be set to whatever is in the json, which is not required to be present for
-            // normal materials
-            .target = command.has_value () ? std::nullopt : cur.optional <std::string> ("target"),
+            .command = command.has_value () ? (command.value () == "copy" ? Command_Copy : Command_Swap) : std::optional<PassCommandType> {},
+            .source = command.has_value () ? cur.require <std::string> ("source", "Effect command must have a source") : cur.optional <std::string> ("source"),
+            .target = command.has_value () ? cur.require <std::string> ("target", "Effect command must have a target") : cur.optional <std::string> ("target"),
         }));
     }
 
@@ -108,6 +98,7 @@ std::vector <FBOUniquePtr> EffectParser::parseFBOs (const JSON& it) {
             .name = cur.require <std::string> ("name", "FBO must have a name"),
             .format = cur.optional <std::string> ("format", "rgba8888"),
             .scale = cur.optional ("scale", 1.0f),
+            .unique = cur.optional ("unique", false),
         }));
     }
 

src/WallpaperEngine/Render/Objects/CImage.cpp

@@ -2,7 +2,6 @@
 #include <sstream>
 
 #include "WallpaperEngine/Data/Parsers/MaterialParser.h"
-#include "WallpaperEngine/Data/Builders/UserSettingBuilder.h"
 #include "WallpaperEngine/Data/Model/Object.h"
 #include "WallpaperEngine/Data/Model/Material.h"
 
@@ -245,7 +244,6 @@ void CImage::setup () {
             new CPass (*this, std::make_shared<CFBOProvider>(this), *cur, std::nullopt, std::nullopt, std::nullopt)
         );
 
-    // TODO: MAYBE GET RID OF THE WHOLE EFFECT CLASS AND PROCESS THE EFFECTS DIRECTLY TO SIMPLIFY RENDERING CODE?
     // prepare the passes list
     if (!this->getImage ().effects.empty ()) {
         // generate the effects used by this material
@@ -265,10 +263,51 @@ void CImage::setup () {
             auto endOverride = cur->passOverrides.end ();
 
             for (; curEffect != endEffect; curEffect++) {
-                auto curPass = (*curEffect)->material->passes.begin ();
-                auto endPass = (*curEffect)->material->passes.end ();
+                if (!(*curEffect)->material.has_value ()) {
+                    if (!(*curEffect)->command.has_value ()) {
+                        sLog.error ("Pass without material and command not supported");
+                        continue;
+                    }
 
-                const auto override = curOverride != endOverride
+                    if (!(*curEffect)->source.has_value ()) {
+                        sLog.error ("Pass without material and source not supported");
+                        continue;
+                    }
+
+                    if (!(*curEffect)->target.has_value ()) {
+                        sLog.error ("Pass without material and target not supported");
+                        continue;
+                    }
+
+                    if ((*curEffect)->command != Command_Copy) {
+                        sLog.error ("Only copy command is supported for pass without material");
+                        continue;
+                    }
+
+                    const auto virtualPass = MaterialPass {
+                        .blending = "normal",
+                        .cullmode = "nocull",
+                        .depthtest = "disabled",
+                        .depthwrite = "disabled",
+                        .shader = "commands/copy",
+                        .textures = {
+                            {0, *(*curEffect)->source}
+                        },
+                        .combos = {}
+                    };
+
+                    const auto& config = this->m_virtualPassess.emplace_back (virtualPass);
+
+                    // build a pass for a copy shader
+                    this->m_passes.push_back (
+                        new CPass (*this, fboProvider, config, std::nullopt, std::nullopt, (*curEffect)->target.value ())
+                    );
+                } else {
+                    auto curPass = (*curEffect)->material.value ()->passes.begin ();
+                    auto endPass = (*curEffect)->material.value ()->passes.end ();
+
+                    const auto override =
+                        curOverride != endOverride
                             ? **curOverride
                             : std::optional<std::reference_wrapper<const ImageEffectPassOverride>> (std::nullopt);
                     const auto target = (*curEffect)->target.has_value ()
@@ -276,12 +315,11 @@ void CImage::setup () {
                                             : std::optional<std::reference_wrapper<std::string>> (std::nullopt);
 
                     this->m_passes.push_back (
-                    new CPass (
-                        *this, fboProvider, **curPass, override, (*curEffect)->binds, target)
-                );
+                        new CPass (*this, fboProvider, **curPass, override, (*curEffect)->binds, target));
 
                     if (curOverride != endOverride) {
-                    curOverride ++;
+                        curOverride++;
+                    }
                 }
             }
         }

src/WallpaperEngine/Render/Objects/CImage.h

@@ -85,6 +85,7 @@ class CImage final : public CObject, public CFBOProvider {
     Effects::CMaterial* m_material = nullptr;
     Effects::CMaterial* m_colorBlendMaterial = nullptr;
     std::vector<Effects::CPass*> m_passes = {};
+    std::vector<MaterialPass> m_virtualPassess = {};
 
     glm::vec4 m_pos = {};
 

src/WallpaperEngine/Render/Objects/Effects/CPass.cpp

@@ -349,7 +349,7 @@ const MaterialPass& CPass::getPass () const {
     return this->m_pass;
 }
 
-const std::optional<std::reference_wrapper<std::string>> CPass::getTarget () const {
+std::optional<std::reference_wrapper<std::string>> CPass::getTarget () const {
     return this->m_target;
 }
 

src/WallpaperEngine/Render/Objects/Effects/CPass.h

@@ -45,7 +45,7 @@ class CPass final : public Helpers::CContextAware {
     [[nodiscard]] std::shared_ptr<const CFBOProvider> getFBOProvider () const;
     [[nodiscard]] const CImage& getImage () const;
     [[nodiscard]] const MaterialPass& getPass () const;
-    [[nodiscard]] const std::optional<std::reference_wrapper<std::string>> getTarget () const;
+    [[nodiscard]] std::optional<std::reference_wrapper<std::string>> getTarget () const;
     [[nodiscard]] Render::Shaders::CShader* getShader () const;
 
   private: