initHEADmaster

1 files changed, 108 insertions, 0 deletions

diff --git a/src/canvas/iterm2/iterm2.cpp b/src/canvas/iterm2/iterm2.cpp
new file mode 100644
index 0000000..2818aab
--- /dev/null
+++ b/src/canvas/iterm2/iterm2.cpp
@@ -0,0 +1,108 @@
+// Display images inside a terminal
+// Copyright (C) 2023  JustKidding
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#include "iterm2.hpp"
+#include "chunk.hpp"
+#include "dimensions.hpp"
+#include "image.hpp"
+#include "terminal.hpp"
+#include "util.hpp"
+
+#include <algorithm>
+#include <filesystem>
+#include <fstream>
+#include <iostream>
+
+#include <fmt/format.h>
+#include <spdlog/spdlog.h>
+
+#ifdef HAVE_STD_EXECUTION_H
+#  include <execution>
+#else
+#  include <oneapi/tbb.h>
+#endif
+
+#include <range/v3/all.hpp>
+
+namespace fs = std::filesystem;
+
+Iterm2::Iterm2(std::unique_ptr<Image> new_image, std::mutex *stdout_mutex)
+    : image(std::move(new_image)),
+      stdout_mutex(stdout_mutex)
+{
+    const auto dims = image->dimensions();
+    x = dims.x + 1;
+    y = dims.y + 1;
+    horizontal_cells = std::ceil(static_cast<double>(image->width()) / dims.terminal->font_width);
+    vertical_cells = std::ceil(static_cast<double>(image->height()) / dims.terminal->font_height);
+}
+
+Iterm2::~Iterm2()
+{
+    const std::scoped_lock lock{*stdout_mutex};
+    util::clear_terminal_area(x, y, horizontal_cells, vertical_cells);
+}
+
+void Iterm2::draw()
+{
+    str.append("\033]1337;File=inline=1;");
+    const auto filename = image->filename();
+    const auto num_bytes = fs::file_size(filename);
+    const auto encoded_filename =
+        util::base64_encode(reinterpret_cast<const unsigned char *>(filename.c_str()), filename.size());
+    str.append(fmt::format("size={};name={};width={}px;height={}px:", num_bytes, encoded_filename, image->width(),
+                           image->height()));
+
+    const int chunk_size = 1023;
+    const auto chunks = process_chunks(filename, chunk_size, num_bytes);
+    const int num_chunks = std::ceil(static_cast<double>(num_bytes) / chunk_size);
+    const uint64_t bytes_per_chunk = 4 * ((chunk_size + 2) / 3) + 100;
+    str.reserve((num_chunks + 2) * bytes_per_chunk);
+
+    ranges::for_each(chunks, [this](const std::unique_ptr<Iterm2Chunk> &chunk) { str.append(chunk->get_result()); });
+    str.append("\a");
+
+    const std::scoped_lock lock{*stdout_mutex};
+    util::save_cursor_position();
+    util::move_cursor(y, x);
+    std::cout << str << std::flush;
+    util::restore_cursor_position();
+    str.clear();
+}
+
+auto Iterm2::process_chunks(const std::string &filename, int chunk_size, size_t num_bytes)
+    -> std::vector<std::unique_ptr<Iterm2Chunk>>
+{
+    const int num_chunks = std::ceil(static_cast<double>(num_bytes) / chunk_size);
+    std::vector<std::unique_ptr<Iterm2Chunk>> chunks;
+    chunks.reserve(num_chunks + 2);
+
+    std::ifstream ifs(filename);
+    while (ifs.good()) {
+        auto chunk = std::make_unique<Iterm2Chunk>(chunk_size);
+        ifs.read(chunk->get_buffer(), chunk_size);
+        chunk->set_size(ifs.gcount());
+        chunks.push_back(std::move(chunk));
+    }
+
+#ifdef HAVE_STD_EXECUTION_H
+    std::for_each(std::execution::par_unseq, chunks.begin(), chunks.end(), Iterm2Chunk::process_chunk);
+#else
+    oneapi::tbb::parallel_for_each(chunks.begin(), chunks.end(), Iterm2Chunk());
+#endif
+
+    return chunks;
+}