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146 lines
3.8 KiB
C++
146 lines
3.8 KiB
C++
//
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// ArrayBuilder.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 17/11/2016.
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// Copyright © 2016 Thomas Harte. All rights reserved.
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//
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#include "ArrayBuilder.hpp"
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#include <cstring>
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using namespace Outputs::CRT;
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ArrayBuilder::ArrayBuilder(std::size_t input_size, std::size_t output_size) :
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output_(output_size, nullptr),
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input_(input_size, nullptr) {}
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ArrayBuilder::ArrayBuilder(std::size_t input_size, std::size_t output_size, std::function<void(bool is_input, uint8_t *, std::size_t)> submission_function) :
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output_(output_size, submission_function),
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input_(input_size, submission_function) {}
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bool ArrayBuilder::is_full() {
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bool was_full;
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was_full = is_full_;
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return was_full;
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}
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uint8_t *ArrayBuilder::get_input_storage(std::size_t size) {
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return get_storage(size, input_);
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}
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uint8_t *ArrayBuilder::get_output_storage(std::size_t size) {
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return get_storage(size, output_);
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}
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void ArrayBuilder::flush(const std::function<void(uint8_t *input, std::size_t input_size, uint8_t *output, std::size_t output_size)> &function) {
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if(!is_full_) {
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std::size_t input_size = 0, output_size = 0;
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uint8_t *input = input_.get_unflushed(input_size);
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uint8_t *output = output_.get_unflushed(output_size);
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function(input, input_size, output, output_size);
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input_.flush();
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output_.flush();
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}
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}
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void ArrayBuilder::bind_input() {
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input_.bind();
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}
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void ArrayBuilder::bind_output() {
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output_.bind();
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}
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ArrayBuilder::Submission ArrayBuilder::submit() {
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ArrayBuilder::Submission submission;
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submission.input_size = input_.submit(true);
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submission.output_size = output_.submit(false);
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if(is_full_) {
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is_full_ = false;
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input_.reset();
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output_.reset();
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}
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return submission;
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}
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ArrayBuilder::Buffer::Buffer(std::size_t size, std::function<void(bool is_input, uint8_t *, std::size_t)> submission_function) :
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submission_function_(submission_function) {
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if(!submission_function_) {
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glGenBuffers(1, &buffer);
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glBindBuffer(GL_ARRAY_BUFFER, buffer);
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glBufferData(GL_ARRAY_BUFFER, (GLsizeiptr)size, NULL, GL_STREAM_DRAW);
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}
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data.resize(size);
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}
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ArrayBuilder::Buffer::~Buffer() {
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if(!submission_function_)
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glDeleteBuffers(1, &buffer);
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}
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uint8_t *ArrayBuilder::get_storage(std::size_t size, Buffer &buffer) {
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uint8_t *pointer = buffer.get_storage(size);
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if(!pointer) is_full_ = true;
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return pointer;
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}
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uint8_t *ArrayBuilder::Buffer::get_storage(std::size_t size) {
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if(is_full || allocated_data + size > data.size()) {
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is_full = true;
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return nullptr;
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}
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uint8_t *pointer = &data[allocated_data];
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allocated_data += size;
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return pointer;
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}
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uint8_t *ArrayBuilder::Buffer::get_unflushed(std::size_t &size) {
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if(is_full) {
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return nullptr;
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}
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size = allocated_data - flushed_data;
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return &data[flushed_data];
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}
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void ArrayBuilder::Buffer::flush() {
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if(submitted_data) {
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memmove(data.data(), &data[submitted_data], allocated_data - submitted_data);
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allocated_data -= submitted_data;
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flushed_data -= submitted_data;
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submitted_data = 0;
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}
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flushed_data = allocated_data;
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}
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std::size_t ArrayBuilder::Buffer::submit(bool is_input) {
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std::size_t length = flushed_data;
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if(submission_function_) {
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submission_function_(is_input, data.data(), length);
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} else {
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glBindBuffer(GL_ARRAY_BUFFER, buffer);
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uint8_t *destination = static_cast<uint8_t *>(glMapBufferRange(GL_ARRAY_BUFFER, 0, (GLsizeiptr)length, GL_MAP_WRITE_BIT | GL_MAP_UNSYNCHRONIZED_BIT | GL_MAP_FLUSH_EXPLICIT_BIT));
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std::memcpy(destination, data.data(), length);
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glFlushMappedBufferRange(GL_ARRAY_BUFFER, 0, (GLsizeiptr)length);
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glUnmapBuffer(GL_ARRAY_BUFFER);
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}
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submitted_data = flushed_data;
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return length;
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}
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void ArrayBuilder::Buffer::bind() {
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glBindBuffer(GL_ARRAY_BUFFER, buffer);
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}
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void ArrayBuilder::Buffer::reset() {
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is_full = false;
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allocated_data = 0;
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flushed_data = 0;
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submitted_data = 0;
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}
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