remove GLBuffer constructor parameters

src/client/GLBuffer.cc

@@ -1,14 +1,27 @@
 
 #include "GLBuffer.h"
 
-GLBuffer::GLBuffer(GLenum target, GLenum usage, const void *ptr, size_t sz)
+GLBuffer::GLBuffer()
 {
-    glGenBuffers(1, &m_id);
-    glBindBuffer(target, m_id);
-    glBufferData(target, sz, ptr, usage);
+    m_id = 0;
 }
 
 GLBuffer::~GLBuffer()
 {
-    glDeleteBuffers(1, &m_id);
+    if (m_id > 0)
+    {
+        glDeleteBuffers(1, &m_id);
+    }
+}
+
+bool GLBuffer::create(GLenum target, GLenum usage, const void *ptr, size_t sz)
+{
+    glGenBuffers(1, &m_id);
+    if (m_id > 0)
+    {
+        glBindBuffer(target, m_id);
+        glBufferData(target, sz, ptr, usage);
+        return true;
+    }
+    return false;
 }

src/client/GLBuffer.h

@@ -7,8 +7,9 @@
 class GLBuffer
 {
     public:
-        GLBuffer(GLenum target, GLenum usage, const void *ptr, size_t sz);
+        GLBuffer();
         ~GLBuffer();
+        bool create(GLenum target, GLenum usage, const void *ptr, size_t sz);
         GLuint get_id() { return m_id; }
     protected:
         GLuint m_id;