1 files changed, 106 insertions, 0 deletions
diff --git a/src/canvas/kitty/kitty.cpp b/src/canvas/kitty/kitty.cpp
new file mode 100644
index 0000000..ed89948
--- /dev/null
+++ b/src/canvas/kitty/kitty.cpp
@@ -0,0 +1,106 @@
+// 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 "kitty.hpp"
+#include "dimensions.hpp"
+#include "util.hpp"
+
+#include <fmt/format.h>
+
+#include <iostream>
+
+#ifdef HAVE_STD_EXECUTION_H
+#  include <execution>
+#else
+#  include <oneapi/tbb.h>
+#endif
+
+Kitty::Kitty(std::unique_ptr<Image> new_image, std::mutex *stdout_mutex)
+    : image(std::move(new_image)),
+      stdout_mutex(stdout_mutex),
+      id(util::generate_random_number<uint32_t>(1))
+{
+    const auto dims = image->dimensions();
+    x = dims.x + 1;
+    y = dims.y + 1;
+}
+
+Kitty::~Kitty()
+{
+    const std::scoped_lock lock{*stdout_mutex};
+    std::cout << fmt::format("\033_Ga=d,d=i,i={}\033\\", id) << std::flush;
+}
+
+void Kitty::draw()
+{
+    generate_frame();
+}
+
+void Kitty::generate_frame()
+{
+    const int bits_per_channel = 8;
+    auto chunks = process_chunks();
+    str.append(fmt::format("\033_Ga=T,m=1,i={},q=2,f={},s={},v={};{}\033\\", id, image->channels() * bits_per_channel,
+                           image->width(), image->height(), chunks.front().get_result()));
+
+    for (auto chunk = std::next(std::begin(chunks)); chunk != std::prev(std::end(chunks)); std::advance(chunk, 1)) {
+        str.append("\033_Gm=1,q=2;");
+        str.append(chunk->get_result());
+        str.append("\033\\");
+    }
+
+    str.append("\033_Gm=0,q=2;");
+    str.append(chunks.back().get_result());
+    str.append("\033\\");
+
+    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 Kitty::process_chunks() -> std::vector<KittyChunk>
+{
+    const uint64_t chunk_size = 3068;
+    uint64_t num_chunks = image->size() / chunk_size;
+    uint64_t last_chunk_size = image->size() % chunk_size;
+    if (last_chunk_size == 0) {
+        last_chunk_size = chunk_size;
+        num_chunks--;
+    }
+    const uint64_t bytes_per_chunk = 4 * ((chunk_size + 2) / 3) + 100;
+    str.reserve((num_chunks + 2) * bytes_per_chunk);
+
+    std::vector<KittyChunk> chunks;
+    chunks.reserve(num_chunks + 2);
+    const auto *ptr = image->data();
+
+    uint64_t idx = 0;
+    for (; idx < num_chunks; idx++) {
+        chunks.emplace_back(ptr + idx * chunk_size, chunk_size);
+    }
+    chunks.emplace_back(ptr + idx * chunk_size, last_chunk_size);
+
+#ifdef HAVE_STD_EXECUTION_H
+    std::for_each(std::execution::par_unseq, std::begin(chunks), std::end(chunks), KittyChunk::process_chunk);
+#else
+    oneapi::tbb::parallel_for_each(std::begin(chunks), std::end(chunks), KittyChunk());
+#endif
+
+    return chunks;
+}