licence: MIT LICENSE and SPDX identifiers in every first-party file

The repository had no licence at all, so every source was all-rights-reserved
by default. Add the verbatim MIT text at LICENSE (Copyright (c) 2026 Martino
Ferrari) and a two-line SPDX header to each of the 113 first-party sources --
48 include/plot, 26 src, 10 adapters, 5 examples, 21 tests, 3 tools -- so the
grant travels with each file rather than relying on the root document alone.

Scripts keep their shebang on line 1; the SPDX lines follow it. Genuinely
vendored code is untouched: third_party/stb_truetype.h carries no header of
ours. src/render/embedded_mono_font.cpp is generated, so tools/fonts/gen_atlas.py
emit() now writes the two lines into its header comment and the file was
regenerated -- gen_atlas.py --check passes and the regeneration adds only those
comment lines to the previously committed file.

README's provenance section now states MIT and links LICENSE.

No code, test or public API change.

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Martino Ferrari
+
+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.

README.md

@@ -139,8 +139,10 @@ them, because its adapters are off and 11 cases need an adapter target (8 in
 
 ## Licence and third-party provenance
 
-- **This library** ships **no licence file** — there is no `LICENSE`/`COPYING` in the
+- **This library** is **MIT licensed**: the full text is in [`LICENSE`](LICENSE), and
-  repository, so the sources carry no granted licence and a distributor must add one.
+  every first-party file (C++, Python and shell) carries its SPDX identifier in the file
+  header — `// SPDX-License-Identifier: MIT` — so the grant travels with each source file,
+  not just the repository root.
 - **Adwaita Mono** (the embedded font, `render::EmbeddedMonoFont`) is under **SIL OFL
   1.1**, committed verbatim at [`licences/OFL-1.1.txt`](licences/OFL-1.1.txt). The backend
   class is named neutrally (`EmbeddedMonoFont`, not "Adwaita Mono") because OFL reserves

adapters/glfw/glfw_host.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <glfw/glfw_host.hpp>
 
 // Before GLFW's header, so it does not include <GL/gl.h>: that header's macros

adapters/glfw/glfw_host.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 
 #include <functional>

adapters/gtk4/gtk_input.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 
 #include <plot/core/rect.hpp>

adapters/gtk4/gtk_plot_area.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <gtk4/gtk_plot_area.hpp>
 
 #include <gtk4/gtk_input.hpp>

adapters/gtk4/gtk_plot_area.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 
 #include <functional>

adapters/imgui/imgui_plot.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <imgui/imgui_plot.hpp>
 
 #include <imgui.h>

adapters/imgui/imgui_plot.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 
 #include <optional>

adapters/qt6/qt_plot_widget.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <qt6/qt_plot_widget.hpp>
 #include <qt6/qt_pointer.hpp>
 

adapters/qt6/qt_plot_widget.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 
 // The plot headers come first, and must. Qt's <QOpenGLWidget> reaches

adapters/qt6/qt_pointer.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 
 #include <plot/core/types.hpp>

examples/glfw_demo.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 // The reference application: the whole library running as a real program, fed by
 // a 1 MS/s producer thread through the GLFW adapter.
 //

examples/gtk_demo.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 // The GTK4 application: the same 1 MS/s stream the other demos draw, as the
 // content of a GtkApplicationWindow whose header bar carries its own "Fit"
 // button, with GTK drawing the window chrome around a plot the area renders into

examples/imgui_demo.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 // The Dear ImGui application: the same stream the GLFW demo draws, embedded as a
 // widget inside an ImGui window that also owns a few controls, with ImGui drawing
 // its own chrome into the same framebuffer.

examples/multiplot_demo.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 // The multi-plot application: three plots stacked in one `Figure`, sharing one x
 // axis, each carrying its own signals and its own legend.
 //

examples/qt_demo.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 // The Qt application: the same 1 MS/s stream the other demos draw, as the central
 // widget of a QMainWindow that also carries its own toolbar, with Qt drawing the
 // window chrome around a plot the widget renders into its own framebuffer.

include/plot/core/color.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <plot/core/types.hpp>
 

include/plot/core/rect.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <plot/core/types.hpp>
 

include/plot/core/span.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <cstddef>
 #include <span>

include/plot/core/status.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <plot/core/types.hpp>
 

include/plot/core/types.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <cstddef>
 #include <cstdint>

include/plot/data/array_series.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <vector>
 

include/plot/data/detail/cover_count.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 
 #ifdef PLOT_PYRAMID_COUNT_COVERS

include/plot/data/detail/merge_count.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 
 #ifdef PLOT_PYRAMID_COUNT_MERGES

include/plot/data/minmax_pyramid.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <deque>
 #include <vector>

include/plot/data/ring_buffer.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <atomic>
 #include <bit>

include/plot/data/series.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <vector>
 

include/plot/data/stream_series.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <vector>
 

include/plot/gl/api.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <plot/core/types.hpp>
 

include/plot/gl/caps.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <plot/gl/api.hpp>
 

include/plot/gl/handle.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <plot/core/color.hpp>
 #include <plot/core/status.hpp>

include/plot/gl/loader.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <plot/gl/api.hpp>
 

include/plot/input/controller.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 
 #include <plot/core/rect.hpp>

include/plot/input/events.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 
 #include <plot/core/types.hpp>

include/plot/math/mat3.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <plot/core/types.hpp>
 

include/plot/math/transform.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <cmath>
 #include <plot/core/types.hpp>

include/plot/math/vec2.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <cmath>
 #include <plot/core/types.hpp>

include/plot/plot.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 
 /// Umbrella header: pulls in every public component of the plot library, in

include/plot/plot/annotation.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <string>
 

include/plot/plot/axis.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <string>
 #include <vector>

include/plot/plot/crosshair.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <string>
 #include <vector>

include/plot/plot/cursor.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <string>
 

include/plot/plot/detail/measure_count.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 
 #ifdef PLOT_COUNT_MEASURE_RECOMPUTES

include/plot/plot/figure.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <span>
 #include <vector>

include/plot/plot/grid.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <vector>
 

include/plot/plot/legend.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <vector>
 

include/plot/plot/measure.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <plot/core/types.hpp>
 #include <plot/data/series.hpp>

include/plot/plot/plot.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <vector>
 

include/plot/plot/region.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <string>
 

include/plot/plot/ticks.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <string>
 #include <vector>

include/plot/plot/trace.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <plot/core/color.hpp>
 #include <plot/core/types.hpp>

include/plot/render/buffer.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <plot/core/status.hpp>
 #include <plot/core/types.hpp>

include/plot/render/detail/ring_stats.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 
 #ifdef PLOT_RING_STATS

include/plot/render/detail/text_scale.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 
 #include <plot/core/types.hpp>

include/plot/render/embedded_mono_font.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <plot/core/types.hpp>
 #include <plot/math/vec2.hpp>

include/plot/render/primitives.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <plot/core/types.hpp>
 #include <plot/math/vec2.hpp>

include/plot/render/program.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <plot/core/color.hpp>
 #include <plot/core/status.hpp>

include/plot/render/renderer.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <span>
 #include <vector>

include/plot/render/shaders.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 
 namespace plot::render {

include/plot/render/style.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <plot/core/color.hpp>
 

include/plot/render/text.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <cmath>
 

include/plot/render/text_atlas.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <plot/core/status.hpp>
 #include <plot/core/types.hpp>

include/plot/render/vertex_array.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <plot/core/status.hpp>
 #include <plot/core/types.hpp>

include/plot/text/true_type_font.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <memory>
 #include <span>

src/core/status.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/core/status.hpp>
 
 namespace plot {

src/data/array_series.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/data/array_series.hpp>
 
 #include <algorithm>

src/data/minmax_pyramid.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/data/detail/cover_count.hpp>
 #include <plot/data/detail/merge_count.hpp>
 #include <plot/data/minmax_pyramid.hpp>

src/data/series.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/data/series.hpp>
 
 #include <algorithm>

src/data/stream_series.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/data/stream_series.hpp>
 
 #include <algorithm>

src/gl/handle.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/gl/handle.hpp>
 
 #include <plot/gl/loader.hpp>

src/gl/loader.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/gl/loader.hpp>
 
 #include <plot/gl/caps.hpp>

src/input/controller.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/input/controller.hpp>
 
 #include <plot/math/transform.hpp>

src/math/transform.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/math/transform.hpp>
 
 namespace plot::math {

src/plot/axis.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/plot/axis.hpp>
 
 namespace plot {

src/plot/figure.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/plot/figure.hpp>
 
 #include <algorithm>

src/plot/grid.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/plot/grid.hpp>
 
 #include <algorithm>

src/plot/measure.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/plot/measure.hpp>
 
 #include <cmath>

src/plot/plot.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/plot/plot.hpp>
 #include <plot/plot/detail/measure_count.hpp>
 

src/plot/ticks.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/plot/ticks.hpp>
 
 #include <cmath>

src/render/buffer.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/render/buffer.hpp>
 
 #include <plot/gl/api.hpp>

src/render/embedded_mono_font.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+//
 // GENERATED FILE -- do not edit by hand.
 //
 // Regenerate with: tools/fonts/gen_atlas.py

src/render/primitives.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/render/primitives.hpp>
 
 #include <cassert>

src/render/program.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/render/program.hpp>
 
 #include <plot/render/shaders.hpp>

src/render/renderer.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/render/renderer.hpp>
 
 #include <plot/gl/api.hpp>

src/render/shaders.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/render/shaders.hpp>
 
 // Both pipelines are `#version 330 core` and stay untouched by the upload

src/render/text.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/render/text.hpp>
 
 namespace plot::render {

src/render/text_atlas.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/render/text_atlas.hpp>
 
 #include <plot/gl/api.hpp>

src/render/vertex_array.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include <plot/render/vertex_array.hpp>
 
 #include <plot/gl/api.hpp>

src/text/stb_truetype_impl.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 // The vendored rasteriser's single implementation unit: the one translation unit
 // in this project that defines STB_TRUETYPE_IMPLEMENTATION, so the ~5000-line
 // stb_truetype.h is compiled exactly once, into the optional plot_font_ttf

src/text/true_type_font.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 // The optional TrueType backend: the one place in the project that parses a font
 // file at run time, and the only consumer of the vendored third_party/stb_truetype.h
 // (see src/text/stb_truetype_impl.cpp for its single implementation unit, and

tests/egl_headless.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include "egl_headless.hpp"
 
 #include <plot/gl/api.hpp>

tests/egl_headless.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <plot/core/status.hpp>
 #include <plot/core/types.hpp>

tests/harness.hpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #pragma once
 #include <cstdio>
 #include <cmath>

tests/main.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include "harness.hpp"
 
 int main() { return plottest::run_all(); }

tests/test_controller.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include "harness.hpp"
 
 #include <plot/input/controller.hpp>

tests/test_figure.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 // `Figure`: several plots stacked in one column, sharing one x range.
 //
 // The layout cases pin the geometry the renderer draws with -- the row rects, the

tests/test_gl_context.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 #include "harness.hpp"
 #include "egl_headless.hpp"
 

tests/test_glfw_host.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 // The GLFW host's event routing in figure mode: which row's controller a pointer pixel
 // reaches.
 //

tests/test_gtk_input.cpp

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: MIT
+// SPDX-FileCopyrightText: 2026 Martino Ferrari
+
 // The GTK adapter's input translation, driven directly.
 //
 // Four pieces of it are this project's logic and not a toolkit's, and none of them