add GLShader::create() which takes a PathRef

src/gui/GLShader.cc

@@ -55,4 +55,18 @@ namespace jes
         }
         return false;
     }
+
+    bool GLShader::create(GLenum shader_type, PathRef path)
+    {
+        uint8_t * file;
+        size_t size;
+        if (!path->read(&file, &size))
+            return false;
+        if (size == 0u)
+            return false;
+
+        bool result = create(shader_type, (const char *)file, size);
+        delete[] file;
+        return result;
+    }
 }

src/gui/GLShader.h

@@ -2,6 +2,7 @@
 #define GLSHADER_H
 
 #include "jes/Ref.h"
+#include "jes/Path.h"
 #include "gl3w.h"
 
 namespace jes
@@ -12,6 +13,7 @@ namespace jes
         GLShader() { m_id = 0u; }
         ~GLShader();
         bool create(GLenum shader_type, const char *source, size_t size);
+        bool create(GLenum shader_type, PathRef path);
         GLuint get_id() { return m_id; }
         bool valid() { return m_id > 0; }
     protected: