mirror of
https://github.com/MaSzyna-EU07/maszyna.git
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124 lines
3.6 KiB
C++
124 lines
3.6 KiB
C++
/*
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This Source Code Form is subject to the
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terms of the Mozilla Public License, v.
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2.0. If a copy of the MPL was not
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distributed with this file, You can
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obtain one at
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http://mozilla.org/MPL/2.0/.
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*/
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#pragma once
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#include "geometrybank.h"
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namespace gfx {
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// opengl vbo-based variant of the geometry bank
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class opengl_vbogeometrybank : public geometry_bank {
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public:
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// constructors:
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opengl_vbogeometrybank() = default;
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// destructor
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~opengl_vbogeometrybank() {
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delete_buffer(); }
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// methods:
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static
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void
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reset() {
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m_activevertexbuffer = 0;
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m_activestreams = gfx::stream::none; }
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private:
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// types:
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struct chunk_record {
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std::size_t vertex_offset{ 0 }; // beginning of the chunk vertex data as offset from the beginning of the last established buffer
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std::size_t vertex_count{ 0 }; // size of the chunk in the last established buffer
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std::size_t index_offset{ 0 };
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std::size_t index_count{ 0 };
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bool is_good{ false }; // true if local content of the chunk matches the data on the opengl end
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};
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using chunkrecord_sequence = std::vector<chunk_record>;
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// methods:
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// create() subclass details
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void
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create_( gfx::geometry_handle const &Geometry ) override;
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// replace() subclass details
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void
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replace_( gfx::geometry_handle const &Geometry ) override;
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// draw() subclass details
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auto
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draw_( gfx::geometry_handle const &Geometry, gfx::stream_units const &Units, unsigned int const Streams ) -> std::size_t override;
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// release() subclass details
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void
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release_() override;
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void
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setup_buffer();
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void
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bind_buffer();
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void
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delete_buffer();
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static
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void
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bind_streams( gfx::stream_units const &Units, unsigned int const Streams );
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static
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void
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release_streams();
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// members:
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static GLuint m_activevertexbuffer; // buffer bound currently on the opengl end, if any
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static unsigned int m_activestreams;
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static std::vector<GLint> m_activetexturearrays;
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GLuint m_vertexbuffer { 0 }; // id of the buffer holding vertex data on the opengl end
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GLuint m_indexbuffer { 0 }; // id of the buffer holding index data on the opengl end
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chunkrecord_sequence m_chunkrecords; // helper data for all stored geometry chunks, in matching order
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};
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// opengl display list based variant of the geometry bank
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class opengl_dlgeometrybank : public geometry_bank {
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public:
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// constructors:
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opengl_dlgeometrybank() = default;
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// destructor:
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~opengl_dlgeometrybank() {
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for( auto &chunkrecord : m_chunkrecords ) {
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::glDeleteLists( chunkrecord.list, 1 ); } }
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private:
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// types:
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struct chunk_record {
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GLuint list { 0 }; // display list associated with the chunk
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unsigned int streams { 0 }; // stream combination used to generate the display list
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std::size_t primitive_count { 0 };
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};
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using chunkrecord_sequence = std::vector<chunk_record>;
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// methods:
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// create() subclass details
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void
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create_( gfx::geometry_handle const &Geometry ) override;
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// replace() subclass details
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void
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replace_( gfx::geometry_handle const &Geometry ) override;
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// draw() subclass details
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auto
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draw_( gfx::geometry_handle const &Geometry, gfx::stream_units const &Units, unsigned int const Streams ) -> std::size_t override;
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// release () subclass details
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void
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release_() override;
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void
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delete_list( gfx::geometry_handle const &Geometry );
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// members:
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chunkrecord_sequence m_chunkrecords; // helper data for all stored geometry chunks, in matching order
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};
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} // namespace gfx
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