pbo changes, trainingcard remarks

gl/buffer.h

@@ -27,7 +27,7 @@ namespace gl
             UNIFORM_BUFFER
         };
 
-    private:
+	protected:
         static GLenum glenum_target(targets target);
 
     public:

gl/fence.h

@@ -1,3 +1,5 @@
+#pragma once
+
 #include "object.h"
 
 namespace gl

gl/pbo.cpp

@@ -49,3 +49,16 @@ bool gl::pbo::is_busy()
 
     return true;
 }
+
+void* gl::pbo::map(GLuint mode, targets target)
+{
+	bind(target);
+	return glMapBuffer(buffer::glenum_target(target), mode);
+}
+
+void gl::pbo::unmap(targets target)
+{
+	bind(target);
+	glUnmapBuffer(buffer::glenum_target(target));
+	sync.emplace();
+}

gl/pbo.h

@@ -1,9 +1,11 @@
+#pragma once
+
 #include "buffer.h"
 #include "fence.h"
 #include <optional>
 
 namespace gl {
-    class pbo : private buffer
+    class pbo : public buffer
     {
         std::optional<fence> sync;
         int size = 0;
@@ -13,5 +15,8 @@ namespace gl {
         void request_read(int x, int y, int lx, int ly, int pixsize = 4, GLenum format = GL_RGBA, GLenum type = GL_UNSIGNED_BYTE);
         bool read_data(int lx, int ly, void *data, int pixsize = 4);
         bool is_busy();
+
+		void* map(GLuint mode, targets target = PIXEL_UNPACK_BUFFER);
+		void unmap(targets target = PIXEL_UNPACK_BUFFER);
     };
 }