Reorganize source files into logical subdirectories

Co-authored-by: Hirek193 <23196899+Hirek193@users.noreply.github.com>

rendering/openglgeometrybank.h

@@ -0,0 +1,124 @@
+/*
+This Source Code Form is subject to the
+terms of the Mozilla Public License, v.
+2.0. If a copy of the MPL was not
+distributed with this file, You can
+obtain one at
+http://mozilla.org/MPL/2.0/.
+*/
+
+#pragma once
+
+#include "geometrybank.h"
+
+namespace gfx {
+
+// opengl vbo-based variant of the geometry bank
+
+class opengl_vbogeometrybank : public geometry_bank {
+
+public:
+// constructors:
+    opengl_vbogeometrybank() = default;
+// destructor
+    ~opengl_vbogeometrybank() {
+        delete_buffer(); }
+// methods:
+    static
+    void
+        reset() {
+            m_activevertexbuffer = 0;
+            m_activestreams = gfx::stream::none; }
+
+private:
+// types:
+    struct chunk_record {
+        std::size_t vertex_offset{ 0 }; // beginning of the chunk vertex data as offset from the beginning of the last established buffer
+        std::size_t vertex_count{ 0 }; // size of the chunk in the last established buffer
+        std::size_t index_offset{ 0 };
+        std::size_t index_count{ 0 };
+        bool is_good{ false }; // true if local content of the chunk matches the data on the opengl end
+    };
+
+    using chunkrecord_sequence = std::vector<chunk_record>;
+
+// methods:
+    // create() subclass details
+    void
+        create_( gfx::geometry_handle const &Geometry ) override;
+    // replace() subclass details
+    void
+        replace_( gfx::geometry_handle const &Geometry ) override;
+    // draw() subclass details
+    auto
+        draw_( gfx::geometry_handle const &Geometry, gfx::stream_units const &Units, unsigned int const Streams ) -> std::size_t override;
+    // release() subclass details
+    void
+        release_() override;
+    void
+        setup_buffer();
+    void
+        bind_buffer();
+    void
+        delete_buffer();
+    static
+    void
+        bind_streams(gfx::stream_units const &Units, unsigned int const Streams , size_t offset = 0);
+    static
+    void
+        release_streams();
+
+// members:
+    static GLuint m_activevertexbuffer; // buffer bound currently on the opengl end, if any
+    static unsigned int m_activestreams;
+    static std::vector<GLint> m_activetexturearrays;
+    GLuint m_vertexbuffer { 0 }; // id of the buffer holding vertex data on the opengl end
+    GLuint m_indexbuffer { 0 }; // id of the buffer holding index data on the opengl end
+    chunkrecord_sequence m_chunkrecords; // helper data for all stored geometry chunks, in matching order
+
+};
+
+// opengl display list based variant of the geometry bank
+
+class opengl_dlgeometrybank : public geometry_bank {
+
+public:
+// constructors:
+    opengl_dlgeometrybank() = default;
+// destructor:
+    ~opengl_dlgeometrybank() {
+        for( auto &chunkrecord : m_chunkrecords ) {
+            ::glDeleteLists( chunkrecord.list, 1 ); } }
+
+private:
+// types:
+    struct chunk_record {
+        GLuint list { 0 }; // display list associated with the chunk
+        unsigned int streams { 0 }; // stream combination used to generate the display list
+        std::size_t primitive_count { 0 };
+    };
+
+    using chunkrecord_sequence = std::vector<chunk_record>;
+
+// methods:
+    // create() subclass details
+    void
+        create_( gfx::geometry_handle const &Geometry ) override;
+    // replace() subclass details
+    void
+        replace_( gfx::geometry_handle const &Geometry ) override;
+    // draw() subclass details
+    auto
+        draw_( gfx::geometry_handle const &Geometry, gfx::stream_units const &Units, unsigned int const Streams ) -> std::size_t override;
+    // release () subclass details
+    void
+        release_() override;
+    void
+        delete_list( gfx::geometry_handle const &Geometry );
+
+// members:
+    chunkrecord_sequence m_chunkrecords; // helper data for all stored geometry chunks, in matching order
+
+};
+
+} // namespace gfx