Maybe make some GL code easier to understand

[ipdf/code.git] / src / bufferbuilder.h

diff --git a/src/bufferbuilder.h b/src/bufferbuilder.h
new file mode 100644 (file)
index 0000000..385369c
--- /dev/null
+++ b/src/bufferbuilder.h
@@ -0,0 +1,25 @@
+#ifndef _BUFFERBUILDER_H
+#define _BUFFERBUILDER_H
+
+namespace IPDF
+{
+       /*
+        * Utility to add stuff to a buffer. 
+        */
+       template <typename T>
+       class BufferBuilder
+       {
+       public:
+               BufferBuilder(void *data, size_t size) : m_bufferData((T*)data), m_bufferSize(size), m_bufferOffset(0) {};
+               // Append an item to the buffer, returning its index.
+               size_t Add(const T& item) {m_bufferData[m_bufferOffset] = item; m_bufferOffset++; return m_bufferOffset-1;}
+               bool Free(size_t num = 1) const {return ((m_bufferOffset + num) * sizeof(T)) < m_bufferSize;}
+       private:
+               T *m_bufferData;
+               size_t m_bufferSize; // In bytes, 'cause why make things easy?
+               size_t m_bufferOffset; // In elements, 'cause why make things consistant?
+       };
+
+}
+
+#endif // _SCREEN_H