From 8a8291d8f4ce39d341f42c6d14b2aaad28cd854e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Konstantin=20K=C3=A4fer?= <mail@kkaefer.com>
Date: Wed, 6 Mar 2019 10:38:58 +0100
Subject: [core] introduce gfx::Context and move Buffer creation/update methods
 to it

---
 src/mbgl/gfx/context.hpp | 62 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 src/mbgl/gfx/context.hpp

(limited to 'src/mbgl/gfx')

diff --git a/src/mbgl/gfx/context.hpp b/src/mbgl/gfx/context.hpp
new file mode 100644
index 0000000000..b57cfcb65c
--- /dev/null
+++ b/src/mbgl/gfx/context.hpp
@@ -0,0 +1,62 @@
+#pragma once
+
+#include <mbgl/gfx/vertex_vector.hpp>
+#include <mbgl/gfx/vertex_buffer.hpp>
+#include <mbgl/gfx/index_vector.hpp>
+#include <mbgl/gfx/index_buffer.hpp>
+#include <mbgl/gfx/types.hpp>
+
+namespace mbgl {
+namespace gfx {
+
+class Context {
+protected:
+    Context() = default;
+
+public:
+    Context(Context&&) = delete;
+    Context(const Context&) = delete;
+    Context& operator=(Context&& other) = delete;
+    Context& operator=(const Context& other) = delete;
+    virtual ~Context() = default;
+
+public:
+    template <class Vertex>
+    VertexBuffer<Vertex>
+    createVertexBuffer(VertexVector<Vertex>&& v,
+                       const BufferUsageType usage = BufferUsageType::StaticDraw) {
+        return { v.elements(), createVertexBufferResource(v.data(), v.bytes(), usage) };
+    }
+
+    template <class Vertex>
+    void updateVertexBuffer(VertexBuffer<Vertex>& buffer, VertexVector<Vertex>&& v) {
+        assert(v.elements() == buffer.elements);
+        updateVertexBufferResource(*buffer.resource, v.data(), v.bytes());
+    }
+
+    template <class DrawMode>
+    IndexBuffer createIndexBuffer(IndexVector<DrawMode>&& v,
+                                  const BufferUsageType usage = BufferUsageType::StaticDraw) {
+        return { v.elements(), createIndexBufferResource(v.data(), v.bytes(), usage) };
+    }
+
+    template <class DrawMode>
+    void updateIndexBuffer(IndexBuffer& buffer, IndexVector<DrawMode>&& v) {
+        assert(v.elements() == buffer.elements);
+        updateIndexBufferResource(*buffer.resource, v.data(), v.bytes());
+    }
+
+protected:
+    virtual std::unique_ptr<const VertexBufferResource>
+    createVertexBufferResource(const void* data, std::size_t size, const BufferUsageType) = 0;
+    virtual void
+    updateVertexBufferResource(const VertexBufferResource&, const void* data, std::size_t size) = 0;
+
+    virtual std::unique_ptr<const IndexBufferResource>
+    createIndexBufferResource(const void* data, std::size_t size, const BufferUsageType) = 0;
+    virtual void
+    updateIndexBufferResource(const IndexBufferResource&, const void* data, std::size_t size) = 0;
+};
+
+} // namespace gfx
+} // namespace mbgl
-- 
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