Shaders: Try to clean up in case we reuse GLSLShader.

shaders/glsl.cpp

@@ -96,6 +96,7 @@ bool GLSLShader::load_shader_preset_file(char *filename)
                        !strcasecmp(&filename[length - 6], ".slang")))
         singlepass = true;
 
+    this->using_slang = false;
     if (length > 7 && (!strcasecmp(&filename[length - 6], ".slang") ||
                        !strcasecmp(&filename[length - 7], ".slangp")))
     {
@@ -1157,6 +1158,15 @@ void GLSLShader::destroy()
         glDeleteProgram(pass[i].program);
         glDeleteTextures(1, &pass[i].texture);
         glDeleteFramebuffers(1, &pass[i].fbo);
+#ifdef USE_SLANG
+        if (using_slang)
+        {
+            if (pass[i].uses_feedback)
+                glDeleteTextures(1, &pass[i].feedback_texture);
+            if (pass[i].ubo_buffer.size() > 0)
+                glDeleteBuffers(1, &pass[i].ubo);
+        }
+#endif
     }
 
     for (unsigned int i = 0; i < lut.size(); i++)
@@ -1169,6 +1179,8 @@ void GLSLShader::destroy()
         glDeleteTextures(1, &prev_frame[i].texture);
     }
 
+    glDeleteBuffers(1, &vbo);
+
     param.clear();
     pass.clear();
     lut.clear();

shaders/glsl.h

@@ -181,10 +181,8 @@ typedef struct
 
     unsigned int frame_count;
     GLuint vbo;
-    GLuint prev_fbo;
-    GLfloat *fa;
 
-    bool using_slang = false;
+    bool using_slang;
 #ifdef USE_SLANG
     std::string slang_get_stage(std::vector<std::string> &lines,
                                 std::string name);
@@ -194,7 +192,7 @@ typedef struct
     void slang_set_shader_vars(int p, bool inverted);
     void slang_clear_shader_vars();
 
-    bool using_feedback = false;
+    bool using_feedback;
 #endif
 } GLSLShader;
 

shaders/slang.cpp

@@ -379,6 +379,7 @@ static inline bool isalldigits(std::string str)
 void GLSLShader::slang_introspect()
 {
     max_prev_frame = 0;
+    using_feedback = false;
 
     for (int i = 1; i < (int)pass.size(); i++)
     {