X-Git-Url: https://git.localhorst.tv/?a=blobdiff_plain;ds=sidebyside;f=src%2Fgraphics%2Fbuffer.hpp;fp=src%2Fgraphics%2Fbuffer.hpp;h=288cdc8c2d99b049b4f35e0d8c6a2f19ad353a1c;hb=0146c7b7f02ef5d74116546489aee85383bb4969;hp=0000000000000000000000000000000000000000;hpb=0fc4efc1800c07534c1e945618630910e2a8e87f;p=tacos.git

diff --git a/src/graphics/buffer.hpp b/src/graphics/buffer.hpp
new file mode 100644
index 0000000..288cdc8
--- /dev/null
+++ b/src/graphics/buffer.hpp
@@ -0,0 +1,60 @@
+#ifndef TACOS_GRAPHICS_BUFFER_HPP_
+#define TACOS_GRAPHICS_BUFFER_HPP_
+
+#include "../app/error.hpp"
+
+#include <algorithm>
+#include <GL/glew.h>
+
+
+namespace tacos {
+
+template<class T>
+class MappedBuffer {
+
+public:
+	MappedBuffer(GLenum target, GLenum access)
+	: buf(reinterpret_cast<T *>(glMapBuffer(target, access)))
+	, target(target) {
+		if (!buf) {
+			throw GLError("failed to map buffer");
+		}
+	}
+	MappedBuffer()
+	: buf(nullptr)
+	, target(0) {
+	}
+	~MappedBuffer() noexcept {
+		if (buf) {
+			glUnmapBuffer(target);
+		}
+	}
+
+	MappedBuffer(MappedBuffer<T> &&other) noexcept
+	: buf(other.buf)
+	, target(other.target) {
+		other.buf = nullptr;
+	}
+	MappedBuffer<T> &operator =(MappedBuffer<T> &&other) noexcept {
+		std::swap(buf, other.buf);
+		std::swap(target, other.target);
+	}
+
+	MappedBuffer(const MappedBuffer<T> &) = delete;
+	MappedBuffer<T> &operator =(const MappedBuffer<T> &) = delete;
+
+	explicit operator bool() const noexcept { return buf; }
+
+public:
+	T &operator [](std::size_t i) noexcept { return buf[i]; }
+	const T &operator [](std::size_t i) const noexcept { return buf[i]; }
+
+private:
+	T *buf;
+	GLenum target;
+
+};
+
+}
+
+#endif