This document attempts to list user-visible changes and any major internal rearrangements of Notcurses. * 1.6.0 (not yet released) * Behavior has changed regarding use of the provided `FILE*` (which, when `NULL`, is assumed to be `stdout`). Both Notcurses and `ncdirect` now try to open a handle to the controlling TTY, **unless** the provided `FILE` is a TTY, in which case it is used directly. Certain interactions now only go to a TTY, in particular `ncdirect_cursor_yx()` and various `ioctl()`s used internally. Furthermore, when no true TTY is found (true for e.g. daemonized processes and those in a Docker launched without `-t`), Notcurses (in both full mode and direct mode) will return a virtual screen size of 80x24. This greatly improves behavior when redirecting to a file or lacking a TTY; one upshot is that we now have much-expanded unit test coverage in the Docker+Drone autobuilders. * `ncdirect_render_image()` has been added, allowing images (but not videos or animated images) to be rendered directly into the standard I/O streams. It begins drawing from the current cursor position, running through the right-hand side of the screen, and scrolling as much content as is necessary. * `ncneofetch` has been rewritten to use `ncdirect`, and thus no longer clobbers your entire terminal, and scrolls like standard I/O. * 1.5.3 (2020-06-28) * The default blitter when `NCSCALE_STRETCH` is used is now `NCBLIT_2x2`, replacing `NCBLIT_2x1`. It is not the default for `NCSCALE_NONE` and `NCSCALE_SCALE` because it does not preserve aspect ratio. * The values of `CELL_ALPHA_OPAQUE` and friends have been redefined to match their values within a channel representation. If you've been using the named constants, this should have no effect on you; they sort the same, subtract the same, and a zero initialization remains just as opaque as it ever was. If you weren't using their named constants, now's an excellent time to revise that policy. `CELL_ALPHA_SHIFT` has been eliminated; if you happened to be using this, the redefinition of the other `CELL_*` constants (probably) means you no longer need to. * 1.5.2 (2020-06-19) * The `ncneofetch` program has been added, of no great consequence. * A `NULL` value can now be passed as `sbytes` to `ncplane_puttext()`. * `ncvisual_geom()` now takes scaling into account. * `notcurses_cantruecolor()` has been added, allowing clients to determine whether the full RGB space is available to us. If not, we only have palette-indexed pseudocolor. * 1.5.1 (2020-06-15) * The semantics of rendering have changed slightly. In 1.5.0 and prior versions, a cell without a glyph was replaced *in toto* by that plane's base cell at rendering time. The replacement is now tripartite: if there is no glyph, the base cell's glyph is used; if there is a default foreground, the base cell's foreground is used; if there is a default background, the base cell's background is used. This will hopefully be more intuitive, and allows a plane to effect overlays of varying colors without needing to override glyphs (#395). * `ncvisual_geom()`'s `ncblitter_e` argument has been replaced with a `const struct ncvisual_options*`, so that `NCVISUAL_OPTIONS_NODEGRADE` can be taken into account (the latter contains a `blitter_e` field). * Added `ncuplot_sample()` and `ncdplot_sample()`, allowing retrieval of sample data from `ncuplot`s and `ncdplot`s, respectively. * Added convenience function `ncplane_home()`, which sets the cursor to the plane's origin (and returns `void`, since it cannot fail). * `ncplane_qrcode()` now accepts an `ncblitter_e`, and two value-result `int*`s `ymax` and `xmax`. The actual size of the drawn code is returned in these parameters. * 1.5.0 (2020-06-08) * The various `bool`s of `struct notcurses_options` have been folded into that `struct`'s `flags` field. Each `bool` has its own `NCOPTION_`. * Added a Pixel API for working directly with the contents of `ncvisual`s, including `ncvisual_at_yx()` and `ncvisual_set_yx()`. * Added `ncplane_puttext()` for writing multiline, line-broken text. * Added `ncplane_putnstr()`, `ncplane_putnstr_yx()`, and `ncplane_putnstr_aligned()` for byte-limited output of UTF-8. * 1.4.5 (2020-06-04) * `ncblit_rgba()` and `ncblit_bgrx()` have replaced most of their arguments with a `const struct ncvisual_options*`. `NCBLIT_DEFAULT` will use `NCBLITTER_2x1` (with fallback) in this context. The `->n` field must be non-`NULL`--new planes will not be created. * Added `ncplane_notcurses_const()`. * 1.4.4.1 (2020-06-01) * Got the `ncvisual` API ready for API freeze: `ncvisual_render()` and `ncvisual_stream()` now take a `struct ncvisual_options`. `ncstyle_e` and a few other parameters have been moved within. Both functions now take a `struct notcurses*`. The `struct ncvisual_options` includes a `ncblitter_e` field, allowing visuals to be mapped to various plotting paradigms including Sixel, Braille and quadrants. Not all backends have been implemented, and not all implementations are in their final form. `CELL_ALPHA_BLEND` can now be used for translucent visuals. * Added `ncvisual_geom()`, providing access to an `ncvisual` size and its pixel-to-cell blitting ratios. * Deprecated functions `ncvisual_open_plane()` and `ncplane_visual_open()` have been removed. Their functionality is present in `ncvisual_from_file()`. The function `ncvisual_plane()` no longer has any meaning, and has been removed. * The `fadecb` typedef now accepts as its third argument a `const struct timespec`. This is the absolute deadline through which the frame ought be displayed. New functions have been added to the Fade API: like the changes to `ncvisual_stream()`, this gives more flexibility, and allows more precise timing. All old functions remain available. * 1.4.3 (2020-05-22) * Plot: make 8x1 the default, instead of 1x1. * Add `PREFIXFMT`, `BPREFIXFMT`, and `IPREFIXFMT` macros for `ncmetric()`. In order to properly use `printf(3)`'s field width capability, these macros must be used. This is necessary to support 'µ' (micro). * C++'s NotCurses constructor now passes a `nullptr` directly through to `notcurses_init()`, rather than replacing it with `stdout`. * Added `USE_STATIC` CMake option, defaulting to `ON`. If turned `OFF`, static libraries will not be built. * 1.4.2.4 (2020-05-20) * Removed `ncplane_move_above_unsafe()` and `ncplane_move_below_unsafe()`; all z-axis moves are now safe. Z-axis moves are all now O(1), rather than the previous O(N). * 1.4.2.3 (2020-05-17) * Added `notcurses_canutf8()`, to verify use of UTF-8 encoding. * Fixed bug in `ncvisual_from_plane()` when invoked on the standard plane. * `ncvisual_from_plane()` now accepts the same four geometric parameters as other plane selectors. To reproduce the old behavior, for `ncv`, call it as `ncvisual_from_plane(ncv, 0, 0, -1, -1)`. * `ncvisual_from_plane()`, `ncplane_move_below_unsafe()`, `ncplane_dup()`, and `ncplane_move_above_unsafe()` now accept `const` arguments where they did not before. * `notcurses_canopen()` has been split into `notcurses_canopen_images()` and `notcurses_canopen_videos()`. * `ncmetric()` now uses multibyte suffixes (particularly for the case of 'µ', i.e. micro). This has changed the values of `PREFIXSTRLEN` and friends. So long as you were using `PREFIXSTRLEN`, this should require only a recompile. If you were using `PREFIXSTRLEN` in a formatted output context to count columns, you must change to `PREFIXCOLUMNS` etc. * The `streamcb` type definition now accepts a `const struct timespec*` as its third argument. This is the absolute time viz `CLOCK_MONOTONIC` through which the frame ought be displayed. The callback must now effect delay. * Mouse coordinates are now properly translated for any margins. * `qprefix()` and `bprefix()` now take a `uintmax_t` in place of an `unsigned`, to match `ncprefix`. * 1.4.1 (2020-05-11) * No user-visible changes (fixed two unit tests). * 1.4.0 (2020-05-10) * `ncplane_content()` was added. It allows all non-null glyphs of a plane to be returned as a nul-terminated, heap-allocated string. * `ncreader` was added. This widget allows freeform input to be edited in a block, and collected into a string. * `selector_options` has been renamed to `ncselector_options`, and `multiselector_options` has been renamed to `ncmultiselector_options`. This matches the other widget option struct's nomenclature. * `ncplane_set_channels()` and `ncplane_set_attr()` have been added to allow `ncplane` attributes to be set directly and in toto. * `NULL` can now be passed as the `FILE*` argument to `notcurses_init()` and `ncdirect_init()`. In this case, a new `FILE*` will be created using `/dev/tty`. If the `FILE*` cannot be created, an error will be returned. * A `flags` field has been added to `notcurses_options`. This will allow new boolean options to be added in the future without resizing the structure. Define `NCOPTION_INHIBIT_SETLOCALE` bit. If it's not set, and the "C" or "POSIX" locale is in use, `notcurses_init()` will invoke `setlocale(LC_ALL, "")`. * All widgets now take an `ncplane*` as their first argument (some took `notcurses*` before). All widgets' `options` structs now have an `unsigned flags` bitfield. This future-proofs the widget API, to a degree. * 1.3.4 (2020-05-07) * `notcurses_lex_margins()` has been added to lex margins expressed in either of two canonical formats. Hopefully this will lead to more programs supporting margins. * `ncvisual_open_plane()` has been renamed `ncvisual_from_file()`. The former has been retained as a deprecated alias. It will be removed by 1.6/2.0. * `ncvisual_from_rgba()` and `ncvisual_from_bgra()` have been added to support creation of `ncvisual`s from memory, requiring no file. * `ncvisual_rotate()` has been added, supporting rotations of arbitrary radians on `ncvisual` objects. * `ncvisual_from_plane()` has been added to support "promotion" of an `ncplane` to an `ncvisual`. The source plane may contain only spaces, half blocks, and full blocks. This builds atop the new function `ncplane_rgba()`, which makes an RGBA flat array from an `ncplane`. * The `ncplane` argument to `ncplane_at_yx()` is now `const`. * 1.3.3 (2020-04-26) * The `ncdplot` type has been added for plots based on `double`s rather than `uint64_t`s. The `ncplot` type and all `ncplot_*` functions were renamed `ncuplot` for symmetry. * FFMpeg types are no longer leaked through the Notcurses API. `AVERROR` is no longer applicable, and `ncvisual_decode()` no longer returns a `struct AVframe*`. Instead, the `nc_err_e` enumeration has been introduced. Functions which once accepted a value-result `AVERROR` now accept a value- result `nc_err_e`. The relevant constants can be found in `notcurses/ncerrs.h`. * OpenImageIO 2.1+ is now supported as an experimental multimedia backend. FFmpeg remains recommended. Video support with OIIO is spotty thus far. * CMake no longer uses the `USE_FFMPEG` option. Instead, the `USE_MULTIMEDIA` option can be defined as `ffmpeg`, `oiio`, or `none`. In `cmake-gui`, this item will now appear as an option selector. `oiio` selects OpenImageIO. * 1.3.2 (2020-04-19) * `ncdirect_cursor_push()`, `notcurses_cursor_pop()`, and `ncdirect_cursor_yx()` have been added. These are not supported on all terminals. `ncdirect_cursor_yx()` ought be considered experimental; it must read a response from the terminal, and this can interact poorly with other uses of standard input. * 1.3.1 unintentionally inverted the C++ `Notcurses::render()` wrapper's return code. The previous semantics have been restored. * 1.3.1 (2020-04-18) * `ncplane_at_yx()` and `ncplane_at_cursor()` have been changed to return a heap-allocated EGC, and write the attributes and channels to value-result `uint32_t*` and `uint64_t*` parameters, instead of to a `cell*`. This matches `notcurses_at_yx()`, and means they're no longer invalidated if the plane in question is destroyed. The previous functionality is available as new functions `ncplane_at_yx_cell()` and `ncplane_at_cursor_cell()`. * `ncplane_set_base()` inverted its `uint32_t attrword` and `uint64_t channels` parameters, thus matching every other function with these two parameters. It moved `const char* egc` before either, to force a type error, as the change would otherwise be likely to go overlooked. * Scrolling is now completely implemented. When a plane has scrolling enabled through use of `ncplane_set_scrolling(true)`, output past the end of the last line will now result in the top line of the plane being lost, all other lines moved up one, and the bottom line cleared. * 1.3.0 (2020-04-12) * No user-visible changes * 1.2.9 (2020-04-11) * No user-visible changes * 1.2.8 (2020-04-10) * `notcurses-tetris` now happily continues if it can't load its background. * 1.2.7 (2020-04-10) * Plots now always keep the most recent data to their far right (i.e., the gap that is initially filled is on the left, rather than the right). * 1.2.6 (2020-04-08) * `ncplane_putsimple_yx()` and `ncplane_putstr_yx()` have been exported as static inline functions. * `ncplane_set_scrolling()` has been added, allowing control over whether a plane scrolls. All planes, including the standard plane, do not scroll by default. If scrolling is enabled, text output via the `*put*` family of functions continues onto the next line when encountering the end of a row. This does not apply to e.g. boxes or lines. * `ncplane_putstr_yx()` now always returns the inverse of the number of columns advanced on an error (it used to return the positive short count so long as the error was due to plane geometry, not bad input). * `ncplot_add_sample()` and `ncplot_set_sample()` have been changed to accept a `uint64_t` rather than `int64_t`, since negative samples do not currently make sense. Plots were made more accurate in general. * `notcurses_term_dim_yx()` now accepts a `const struct notcurses*`. * `notcurses_resize()` is no longer exported. It was never necessary to call this in response to a resize, despite confusing documentation that could have been read to suggest otherwise. If you're in a long block on input, and get an `NCKEY_RESIZE`, just call `notcurses_refresh()` (which now calls `notcurses_resize()` internally, as `notcurses_render()` always has). * First Fedora packaging. * 1.2.5 (2020-04-05) * Add ncplot, with support for sliding-windowed horizontal histograms. * gradient, polyfill, `ncplane_format()` and `ncplane_stain()` all now return the number of cells written on success. Failure still sees -1 returned. * `ncvisual_render()` now returns the number of cells emitted on success, as opposed to 0. Failure still sees -1 returned. * `ncvisual_render()` now interprets length parameters of -1 to mean "to the end along this axis", and no longer interprets 0 to mean this. 0 now means "a length of 0", resulting in a zero-area rendering. * `notcurses_at_yx()` no longer accepts a `cell*` as its last parameter. Instead, it accepts a `uint32_t*` and a `uint64_t*`, and writes the attribute and channels to these parameters. This was done because the `gcluster` field of the `cell*` was always set to 0, which was surprising and a source of blunders. The EGC is returned via the `char*` return value. https://github.com/dankamongmen/notcurses/issues/410 * 1.2.4 (2020-03-24) * Add ncmultiselector * Add `ncdirect_cursor_enable()` and `ncdirect_cursor_disable()`.