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Diffstat (limited to 'drivers/gles3/rasterizer_array.h')
| -rw-r--r-- | drivers/gles3/rasterizer_array.h | 421 |
1 files changed, 421 insertions, 0 deletions
diff --git a/drivers/gles3/rasterizer_array.h b/drivers/gles3/rasterizer_array.h new file mode 100644 index 0000000000..a321c9ed10 --- /dev/null +++ b/drivers/gles3/rasterizer_array.h @@ -0,0 +1,421 @@ +/*************************************************************************/ +/* rasterizer_array.h */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* https://godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */ +/* */ +/* Permission is hereby granted, free of charge, to any person obtaining */ +/* a copy of this software and associated documentation files (the */ +/* "Software"), to deal in the Software without restriction, including */ +/* without limitation the rights to use, copy, modify, merge, publish, */ +/* distribute, sublicense, and/or sell copies of the Software, and to */ +/* permit persons to whom the Software is furnished to do so, subject to */ +/* the following conditions: */ +/* */ +/* The above copyright notice and this permission notice shall be */ +/* included in all copies or substantial portions of the Software. */ +/* */ +/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ +/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ +/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ +/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ +/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ +/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ +/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ +/*************************************************************************/ + +#ifndef RASTERIZER_ARRAY_H +#define RASTERIZER_ARRAY_H + +/** + * Fast single-threaded growable array for POD types. + * For use in render drivers, not for general use. + * TO BE REPLACED by local_vector. + */ + +#include "core/os/memory.h" +#include <string.h> + +#include "core/templates/local_vector.h" +#include "core/templates/vector.h" + +// very simple non-growable array, that keeps track of the size of a 'unit' +// which can be cast to whatever vertex format FVF required, and is initially +// created with enough memory to hold the biggest FVF. +// This allows multiple FVFs to use the same array. +class RasterizerUnitArrayGLES3 { +public: + RasterizerUnitArrayGLES3() { + _list = nullptr; + free(); + } + ~RasterizerUnitArrayGLES3() { free(); } + + uint8_t *get_unit(unsigned int ui) { return &_list[ui * _unit_size_bytes]; } + const uint8_t *get_unit(unsigned int ui) const { return &_list[ui * _unit_size_bytes]; } + + int size() const { return _size; } + int max_size() const { return _max_size; } + + void free() { + if (_list) { + memdelete_arr(_list); + _list = 0; + } + _size = 0; + _max_size = 0; + _max_size_bytes = 0; + _unit_size_bytes = 0; + } + + void create(int p_max_size_units, int p_max_unit_size_bytes) { + free(); + + _max_unit_size_bytes = p_max_unit_size_bytes; + _max_size = p_max_size_units; + _max_size_bytes = p_max_size_units * p_max_unit_size_bytes; + + if (_max_size_bytes) { + _list = memnew_arr(uint8_t, _max_size_bytes); + } + } + + void prepare(int p_unit_size_bytes) { + _unit_size_bytes = p_unit_size_bytes; + _size = 0; + } + + // several items at a time + uint8_t *request(int p_num_items = 1) { + int old_size = _size; + _size += p_num_items; + + if (_size <= _max_size) { + return get_unit(old_size); + } + + // revert + _size = old_size; + return nullptr; + } + +private: + uint8_t *_list; + int _size; // in units + int _max_size; // in units + int _max_size_bytes; + int _unit_size_bytes; + int _max_unit_size_bytes; +}; + +template <class T> +class RasterizerArray { +public: + RasterizerArray() { + _list = 0; + _size = 0; + _max_size = 0; + } + ~RasterizerArray() { free(); } + + T &operator[](unsigned int ui) { return _list[ui]; } + const T &operator[](unsigned int ui) const { return _list[ui]; } + + void free() { + if (_list) { + memdelete_arr(_list); + _list = 0; + } + _size = 0; + _max_size = 0; + } + + void create(int p_size) { + free(); + if (p_size) { + _list = memnew_arr(T, p_size); + } + _size = 0; + _max_size = p_size; + } + + void reset() { _size = 0; } + + T *request_with_grow() { + T *p = request(); + if (!p) { + grow(); + return request_with_grow(); + } + return p; + } + + // none of that inefficient pass by value stuff here, thanks + T *request() { + if (_size < _max_size) { + return &_list[_size++]; + } + return 0; + } + + // several items at a time + T *request(int p_num_items) { + int old_size = _size; + _size += p_num_items; + + if (_size <= _max_size) { + return &_list[old_size]; + } + + // revert + _size = old_size; + return 0; + } + + int size() const { return _size; } + int max_size() const { return _max_size; } + const T *get_data() const { return _list; } + + bool copy_from(const RasterizerArray<T> &o) { + // no resizing done here, it should be done manually + if (o.size() > _max_size) + return false; + + // pod types only please! + memcpy(_list, o.get_data(), o.size() * sizeof(T)); + _size = o.size(); + return true; + } + + // if you want this to be cheap, call reset before grow, + // to ensure there is no data to copy + void grow() { + unsigned int new_max_size = _max_size * 2; + if (!new_max_size) + new_max_size = 1; + + T *new_list = memnew_arr(T, new_max_size); + + // copy .. pod types only + if (_list) { + memcpy(new_list, _list, _size * sizeof(T)); + } + + unsigned int new_size = size(); + free(); + _list = new_list; + _size = new_size; + _max_size = new_max_size; + } + +private: + T *_list; + int _size; + int _max_size; +}; + +template <class T> +class RasterizerArray_non_pod { +public: + RasterizerArray_non_pod() { + _size = 0; + } + + const T &operator[](unsigned int ui) const { return _list[ui]; } + + void create(int p_size) { + _list.resize(p_size); + _size = 0; + } + void reset() { _size = 0; } + + void push_back(const T &val) { + while (true) { + if (_size < max_size()) { + _list.set(_size, val); + _size++; + return; + } + + grow(); + } + } + + int size() const { return _size; } + int max_size() const { return _list.size(); } + +private: + void grow() { + unsigned int new_max_size = _list.size() * 2; + if (!new_max_size) + new_max_size = 1; + _list.resize(new_max_size); + } + + Vector<T> _list; + int _size; +}; + +// very simple non-growable array, that keeps track of the size of a 'unit' +// which can be cast to whatever vertex format FVF required, and is initially +// created with enough memory to hold the biggest FVF. +// This allows multiple FVFs to use the same array. +class RasterizerUnitArray { +public: + RasterizerUnitArray() { + _list = nullptr; + free(); + } + ~RasterizerUnitArray() { free(); } + + uint8_t *get_unit(unsigned int ui) { return &_list[ui * _unit_size_bytes]; } + const uint8_t *get_unit(unsigned int ui) const { return &_list[ui * _unit_size_bytes]; } + + int size() const { return _size; } + int max_size() const { return _max_size; } + int get_unit_size_bytes() const { return _unit_size_bytes; } + + void free() { + if (_list) { + memdelete_arr(_list); + _list = 0; + } + _size = 0; + _max_size = 0; + _max_size_bytes = 0; + _unit_size_bytes = 0; + } + + void create(int p_max_size_units, int p_max_unit_size_bytes) { + free(); + + _max_unit_size_bytes = p_max_unit_size_bytes; + _max_size = p_max_size_units; + _max_size_bytes = p_max_size_units * p_max_unit_size_bytes; + + if (_max_size_bytes) { + _list = memnew_arr(uint8_t, _max_size_bytes); + } + } + + void prepare(int p_unit_size_bytes) { + _unit_size_bytes = p_unit_size_bytes; + _size = 0; + } + + // several items at a time + uint8_t *request(int p_num_items = 1) { + int old_size = _size; + _size += p_num_items; + + if (_size <= _max_size) { + return get_unit(old_size); + } + + // revert + _size = old_size; + return nullptr; + } + +private: + uint8_t *_list; + int _size; // in units + int _max_size; // in units + int _max_size_bytes; + int _unit_size_bytes; + int _max_unit_size_bytes; +}; + +template <class T, bool force_trivial = false> +class RasterizerPooledList { + LocalVector<T, uint32_t, force_trivial> list; + LocalVector<uint32_t, uint32_t, true> freelist; + + // not all list members are necessarily used + int _used_size; + +public: + RasterizerPooledList() { + _used_size = 0; + } + + int estimate_memory_use() const { + return (list.size() * sizeof(T)) + (freelist.size() * sizeof(uint32_t)); + } + + const T &operator[](uint32_t p_index) const { + return list[p_index]; + } + T &operator[](uint32_t p_index) { + return list[p_index]; + } + + int size() const { return _used_size; } + + // returns the list id of the allocated item + uint32_t alloc() { + uint32_t id = 0; + _used_size++; + + if (freelist.size()) { + // pop from freelist + int new_size = freelist.size() - 1; + id = freelist[new_size]; + freelist.resize(new_size); + return id; + // return &list[r_id]; + } + + id = list.size(); + list.resize(id + 1); + return id; + // return &list[r_id]; + } + void free(const uint32_t &p_id) { + // should not be on free list already + CRASH_COND(p_id >= list.size()); + freelist.push_back(p_id); + _used_size--; + } +}; + +template <class T, bool force_trivial = false> +class RasterizerPooledIndirectList { +public: + const T &operator[](uint32_t p_index) const { + return *_list[p_index]; + } + T &operator[](uint32_t p_index) { + return *_list[p_index]; + } + + uint32_t alloc() { + uint32_t id = _list.alloc(); + _list[id] = memnew(T); + return id; + } + void free(const uint32_t &p_id) { + CRASH_COND(!_list[p_id]); + memdelete_notnull(_list[p_id]); + _list[p_id] = nullptr; + _list.free(p_id); + } + + ~RasterizerPooledIndirectList() { + // autodelete + for (int n = 0; n < _list.size(); n++) { + if (_list[n]) { + memdelete_notnull(_list[n]); + } + } + } + +private: + RasterizerPooledList<T *, true> _list; +}; + +#endif // RASTERIZER_ARRAY_H |