chore: changed shader compilation slightly so they're passed onto glsl just once

src/WallpaperEngine/Logging/CLog.h

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <iostream>
 #include <memory>
 #include <ostream>
 #include <sstream>
@@ -17,70 +18,49 @@ class CLog {
     void addError (std::ostream* stream);
 
     template <typename... Data> void out (Data... data) {
-        // buffer the string first
-        std::stringbuf buffer;
-        std::ostream bufferStream (&buffer);
-
-        ((bufferStream << std::forward<Data> (data)), ...);
+        std::string str = this->buildBuffer (data...);
 
         // then send it to all the outputs configured
         for (const auto cur : this->mOutputs)
-            *cur << buffer.str () << std::endl;
+            *cur << str << std::endl;
     }
 
     template <typename... Data> void debug (Data... data) {
 #if (!NDEBUG) && (!ERRORONLY)
-        // buffer the string first
-        std::stringbuf buffer;
-        std::ostream bufferStream (&buffer);
-
-        ((bufferStream << std::forward<Data> (data)), ...);
+        std::string str = this->buildBuffer (data...);
 
         // then send it to all the outputs configured
         for (const auto cur : this->mOutputs)
-            *cur << buffer.str () << std::endl;
+            *cur << str << std::endl;
 #endif /* DEBUG */
     }
 
     template <typename... Data> void debugerror (Data... data) {
 #if (!NDEBUG) && (ERRORONLY)
-        // buffer the string first
-        std::stringbuf buffer;
-        std::ostream bufferStream (&buffer);
-
-        ((bufferStream << std::forward<Data> (data)), ...);
+        std::string str = this->buildBuffer (data...);
 
         // then send it to all the outputs configured
         for (const auto cur : this->mOutputs)
-            *cur << buffer.str () << std::endl;
+            *cur << str << std::endl;
 #endif /* DEBUG */
     }
 
     template <typename... Data> void error (Data... data) {
-        // buffer the string first
-        std::stringbuf buffer;
-        std::ostream bufferStream (&buffer);
-
-        ((bufferStream << std::forward<Data> (data)), ...);
+        std::string str = this->buildBuffer (data...);
 
         // then send it to all the outputs configured
         for (const auto cur : this->mErrors)
-            *cur << buffer.str () << std::endl;
+            *cur << str << std::endl;
     }
 
     template <class EX, typename... Data> [[noreturn]] void exception (Data... data) {
-        // buffer the string first
-        std::stringbuf buffer;
-        std::ostream bufferStream (&buffer);
-
-        ((bufferStream << std::forward<Data> (data)), ...);
-
+        std::string str = this->buildBuffer (data...);
         // then send it to all the outputs configured
         for (const auto cur : this->mErrors)
-            *cur << buffer.str () << std::endl;
+            *cur << str << std::endl;
 
         // now throw the exception
-        throw EX (buffer.str ());
+        throw EX (str);
     }
 
     template <typename... Data> [[noreturn]] void exception (Data... data) {
@@ -90,6 +70,16 @@ class CLog {
     static CLog& get ();
 
   private:
+    template <typename... Data> std::string buildBuffer (Data... data) {
+        // buffer the string first
+        std::stringbuf buffer;
+        std::ostream bufferStream (&buffer);
+
+        ((bufferStream << std::forward<Data> (data)), ...);
+
+        return buffer.str ();
+    }
+
     std::vector<std::ostream*> mOutputs;
     std::vector<std::ostream*> mErrors;
     static std::shared_ptr<CLog> sInstance;

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

@@ -282,14 +282,11 @@ Core::Objects::Images::Materials::CPass* CPass::getPass () {
     return this->m_pass;
 }
 
-GLuint CPass::compileShader (Render::Shaders::CCompiler* shader, GLuint type) {
+GLuint CPass::compileShader (const char* shader, GLuint type) {
     // reserve shaders in OpenGL
     const GLuint shaderID = glCreateShader (type);
 
-    // give shader's source code to OpenGL to be compiled
-    const char* sourcePointer = shader->getCompiled ().c_str ();
-
-    glShaderSource (shaderID, 1, &sourcePointer, nullptr);
+    glShaderSource (shaderID, 1, &shader, nullptr);
     glCompileShader (shaderID);
 
     GLint result = GL_FALSE;
@@ -307,7 +304,7 @@ GLuint CPass::compileShader (Render::Shaders::CCompiler* shader, GLuint type) {
         glGetShaderInfoLog (shaderID, infoLogLength, nullptr, logBuffer);
         // throw an exception about the issue
         std::stringstream buffer;
-        buffer << logBuffer << std::endl << "Compiled source code:" << std::endl << shader->getCompiled ();
+        buffer << logBuffer << std::endl << "Compiled source code:" << std::endl << shader;
         // free the buffer
         delete [] logBuffer;
         // throw an exception
@@ -335,19 +332,24 @@ void CPass::setupShaders () {
     this->m_fragShader = new Render::Shaders::CCompiler (
         this->m_material->getImage ()->getContainer (), this->m_pass->getShader (), Shaders::CGLSLContext::ShaderType_Pixel,
         this->m_pass->getCombos (), &m_foundCombos, this->m_pass->getTextures (), this->m_pass->getConstants ());
-    this->m_fragShader->compile ();
     this->m_vertShader = new Render::Shaders::CCompiler (
         this->m_material->getImage ()->getContainer (), this->m_pass->getShader (), Shaders::CGLSLContext::ShaderType_Vertex,
         this->m_pass->getCombos (), &m_foundCombos, this->m_pass->getTextures (), this->m_pass->getConstants ());
-    this->m_vertShader->compile ();
 
-    // they're re-compiled to ensure they are using the latest constants available
-    this->m_fragShader->compile ();
-    this->m_vertShader->compile ();
+    // precompile shaders once so all the data is discovered
+    this->m_fragShader->precompile ();
+    this->m_vertShader->precompile ();
+
+    // precompile them again once all the data is available
+    this->m_fragShader->precompile ();
+    this->m_vertShader->precompile ();
+
+    std::string fragmentCode = this->m_fragShader->compile ();
+    std::string vertexCode = this->m_vertShader->compile ();
 
     // compile the shaders
-    const GLuint vertexShaderID = compileShader (this->m_vertShader, GL_VERTEX_SHADER);
-    const GLuint fragmentShaderID = compileShader (this->m_fragShader, GL_FRAGMENT_SHADER);
+    const GLuint vertexShaderID = compileShader (vertexCode.c_str (), GL_VERTEX_SHADER);
+    const GLuint fragmentShaderID = compileShader (fragmentCode.c_str (), GL_FRAGMENT_SHADER);
     // create the final program
     this->m_programID = glCreateProgram ();
     // link the shaders together

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

@@ -95,7 +95,7 @@ class CPass final : public Helpers::CContextAware {
         const GLuint* value;
     };
 
-    static GLuint compileShader (Render::Shaders::CCompiler* shader, GLuint type);
+    static GLuint compileShader (const char* shader, GLuint type);
     void setupTextures ();
     void setupShaders ();
     void setupShaderVariables ();

src/WallpaperEngine/Render/Shaders/CCompiler.cpp

@@ -64,11 +64,7 @@ std::string CCompiler::lookupShaderFile (const std::string& filename) {
     }
 }
 
-std::string& CCompiler::getCompiled () {
-    return this->m_compiledContent;
-}
-
-void CCompiler::compile () {
+void CCompiler::precompile () {
     // reset include contents as the compilation requires this to be re-processed
     this->m_includeContent = "";
     std::string precompile = "#version 330\n"
@@ -189,6 +185,20 @@ void CCompiler::compile () {
         end = start;
     }
 
+    // reset end so we start from the beginning
+    end = 0;
+
+    // comment out requires
+    while((start = precompile.find("#require", end)) != std::string::npos) {
+        // TODO: CHECK FOR ERRORS HERE
+        size_t lineEnd = precompile.find_first_of('\n', start);
+        sLog.out("Shader has a require block ", precompile.substr (start, lineEnd - start));
+        // replace the first two letters with a comment so the filelength doesn't change
+        precompile = precompile.replace(start, 2, "//");
+
+        // go to the end of the line
+        end = lineEnd;
+    }
     // include content might have more includes, so also handle those
     /*end = 0;
 
@@ -232,8 +242,12 @@ void CCompiler::compile () {
         end = end + this->m_includeContent.length () + 1;
     }*/
 
+    this->m_processedContent = precompile;
+}
+
+std::string CCompiler::compile () {
     // content should be ready, finally ask glslang to compile the shader
-    this->m_compiledContent = CGLSLContext::get().toGlsl (precompile, this->m_type);
+    return CGLSLContext::get().toGlsl (this->m_processedContent, this->m_type);
 }
 
 void CCompiler::parseComboConfiguration (const std::string& content, int defaultValue) {

src/WallpaperEngine/Render/Shaders/CCompiler.h

@@ -40,17 +40,14 @@ class CCompiler {
               std::map<std::string, bool>* foundCombos, const std::vector<std::string>& textures,
               const std::map<std::string, CShaderConstant*>& constants);
     /**
-     * Performs the actual pre-compilation/pre-processing over the shader files
-     * This step is kinda big, replaces variables names on sVariableReplacement,
-     * ensures #include directives are correctly handled
-     * and takes care of attribute comments for the wallpaper engine specifics
+     * Pre-processes the shader to detect variables, process includes and other small things WallpaperEngine
+     * does to shaders before actually using them
      */
-    void compile ();
+    void precompile ();
     /**
-     * @return The compiled shader's text (if available)
+     * Performs the final processing of the shader doing a few last transformations through glslang
      */
-    std::string& getCompiled ();
-
+    std::string compile ();
     /**
      * Searches the list of parameters available for the parameter with the given value
      *
@@ -58,7 +55,6 @@ class CCompiler {
      * @return The shader information
      */
     Variables::CShaderVariable* findParameter (const std::string& identifier);
-
     /**
      * @return The list of parameters available for this shader with their default values
      */
@@ -108,7 +104,7 @@ class CCompiler {
     /**
      * The final, compiled content ready to be used by OpenGL
      */
-    std::string m_compiledContent;
+    std::string m_processedContent;
     /**
      * The contents of all the included files
      */

src/main.cpp

@@ -50,6 +50,7 @@ int main (int argc, char* argv[]) {
     // attach signals to gracefully stop
     std::signal (SIGINT, signalhandler);
     std::signal (SIGTERM, signalhandler);
+    std::signal (SIGKILL, signalhandler);
 
     // show the wallpaper application
     app->show ();
@@ -57,6 +58,7 @@ int main (int argc, char* argv[]) {
     // remove signal handlers before destroying app
     std::signal (SIGINT, SIG_DFL);
     std::signal (SIGTERM, SIG_DFL);
+    std::signal (SIGKILL, SIG_DFL);
 
     delete app;