move static global buffers to RAII

1 files changed, 30 insertions, 0 deletions

diff --git a/src/geometry/vertex_buffer.cpp b/src/geometry/vertex_buffer.cpp
new file mode 100644
index 0000000000..b190e31d8b
--- /dev/null
+++ b/src/geometry/vertex_buffer.cpp
@@ -0,0 +1,30 @@
+#include <llmr/geometry/vertex_buffer.hpp>
+#include <llmr/platform/gl.hpp>
+
+using namespace llmr;
+
+
+VertexBuffer::VertexBuffer(std::initializer_list<int16_t> init) : array(init) {}
+
+VertexBuffer::~VertexBuffer() {
+    if (buffer != 0) {
+        glDeleteBuffers(1, &buffer);
+        buffer = 0;
+    }
+}
+
+uint32_t VertexBuffer::length() const {
+    // We store 2 coordinates per vertex + 1 linesofar + 1 extrude coord pair == 4 (== 8 bytes)
+    return array.size() / 2;
+}
+
+void VertexBuffer::bind() {
+    if (buffer == 0) {
+        glGenBuffers(1, &buffer);
+        glBindBuffer(GL_ARRAY_BUFFER, buffer);
+        glBufferData(GL_ARRAY_BUFFER, array.size() * sizeof(int16_t), array.data(), GL_STATIC_DRAW);
+    } else {
+        glBindBuffer(GL_ARRAY_BUFFER, buffer);
+    }
+
+}