Martino Ferrari
0445a1861b
The factor both the viewport and every forwarded input coordinate use came from `gtk_widget_get_scale_factor()`, which GTK documents as "the next higher integer value" under fractional scaling. It is now derived by `DeviceMapping::from_sizes()` from the widget's logical allocation and the device size `GtkGLArea::resize` reports -- the viewport that signal's default handler sets with `glViewport(0, 0, w, h)` -- so the viewport, the renderer and input are one value by construction. The public `int scale_factor()` became `f32 device_scale()`. `kSurfacePixelsPerNotch` is now 100.0 and documented as a *calibration* with a stated assumption, not a unit conversion attributed to axis_value120/Qt. `::unrealize` releases the renderer unconditionally, after making the context current: the error it used to check says nothing about whether GL names exist (creation failure is the path that returns before a renderer is built), and skipping the release left the deletes to the wrapper's destructor, with no context. The drag anchor caches its press point and offsets in logical pixels and scales the difference by the factor in force now, so a scale change mid-drag cannot become a phantom pan. The demo stops its producer in `on_teardown`, before destroying the window whose renderer the stream feeds.
76 lines
3.1 KiB
CMake
76 lines
3.1 KiB
CMake
# EGL powers the surfaceless headless context the GL tests assert pixels
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# against. It is a *test-only* dependency: plot_core never links or includes it,
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# so a machine without EGL can still build the library (-DPLOT_BUILD_TESTS=OFF).
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# Prefer CMake's own module, fall back to pkg-config, and fail loudly if neither
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# can supply EGL rather than silently dropping the GL tests.
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find_package(EGL QUIET)
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if(NOT EGL_FOUND)
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find_package(PkgConfig QUIET)
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if(PkgConfig_FOUND)
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pkg_check_modules(EGL_PC QUIET IMPORTED_TARGET egl)
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endif()
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endif()
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if(TARGET EGL::EGL)
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set(plot_egl_library EGL::EGL)
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elseif(TARGET PkgConfig::EGL_PC)
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set(plot_egl_library PkgConfig::EGL_PC)
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else()
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message(FATAL_ERROR
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"plot: PLOT_BUILD_TESTS=ON requires EGL (EGL/egl.h plus libEGL) for the headless "
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"OpenGL context used by the GL tests. Install it (e.g. libegl-dev, libegl1-mesa-dev "
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"or mesa-libEGL-devel) or configure with -DPLOT_BUILD_TESTS=OFF.")
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endif()
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find_package(Threads REQUIRED) # std::thread in the push/read race test
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add_executable(plot_tests
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main.cpp
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test_transform.cpp
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test_gl_context.cpp
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test_primitives.cpp
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test_ring_buffer.cpp
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test_minmax_pyramid.cpp
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test_series.cpp
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test_ticks.cpp
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test_measure.cpp
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test_plot.cpp
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test_render_smoke.cpp
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test_controller.cpp
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egl_headless.cpp
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)
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target_link_libraries(plot_tests PRIVATE plot::core ${plot_egl_library} Threads::Threads)
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# The Dear ImGui widget is the one adapter with a test here: its input translation
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# (edge synthesis, the hover gate, drag capture, wheel containment) is logic this
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# project owns, not a toolkit's. The suite is otherwise ImGui-free, so the source
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# and the link are added only when the adapter exists -- which the top-level
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# CMakeLists.txt guarantees by adding the adapters before this directory.
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if(TARGET plot::imgui)
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target_sources(plot_tests PRIVATE test_imgui_widget.cpp)
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target_link_libraries(plot_tests PRIVATE plot::imgui imgui)
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endif()
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# The Qt adapter's pointer anchor is deliberately toolkit-free (see
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# adapters/qt6/qt_pointer.hpp), so this one piece of that adapter's translation is
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# tested without linking Qt -- and without `PLOT_BUILD_QT6`, since no Qt target has
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# to exist for it to compile.
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target_sources(plot_tests PRIVATE test_qt_pointer.cpp)
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# Same for the GTK adapter's input translation (see adapters/gtk4/gtk_input.hpp):
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# the device-pixel mapping it derives from GTK's two sizes, the pixel space its drag
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# anchor is kept in, the wheel's unit and sign and the modifier mask are this
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# project's logic, and a headless X server at an integer scale can exercise only
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# part of it.
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target_sources(plot_tests PRIVATE test_gtk_input.cpp)
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target_include_directories(plot_tests PRIVATE "${CMAKE_SOURCE_DIR}/adapters")
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# Same switches the library is built with: the cost tests read the counters
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# behind them (see include/plot/data/detail/{cover,merge}_count.hpp).
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target_compile_definitions(plot_tests PRIVATE PLOT_PYRAMID_COUNT_COVERS
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PLOT_PYRAMID_COUNT_MERGES
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PLOT_RING_STATS)
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plot_apply_warnings(plot_tests)
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add_test(NAME plot_tests COMMAND plot_tests)
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