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James Holderness 90ff261c35
Add support for downloadable soft fonts (#10011) 
This PR adds conhost support for downloadable soft fonts - also known as
dynamically redefinable character sets (DRCS) - using the `DECDLD`
escape sequence.

These fonts are typically designed to work on a specific terminal model,
and each model tends to have a different character cell size. So in
order to support as many models as possible, the code attempts to detect
the original target size of the font, and then scale the glyphs to fit
our current cell size.

Once a font has been downloaded to the terminal, it can be designated in
the same way you would a standard character set, using an `SCS` escape
sequence. The identification string for the set is defined by the
`DECDLD` sequence. Internally we map the characters in this set to code
points `U+EF20` to `U+EF7F` in the Unicode private use are (PUA).

Then in the renderer, any characters in that range are split off into
separate runs, which get painted with a special font. The font itself is
dynamically generated as an in-memory resource, constructed from the
downloaded character bitmaps which have been scaled to the appropriate
size.

If no soft fonts are in use, then no mapping of the PUA code points will
take place, so this shouldn't interfere with anyone using those code
points for something else, as along as they aren't also trying to use
soft fonts. I also tried to pick a PUA range that hadn't already been
snatched up by Nerd Fonts, but if we do receive reports of a conflict,
it's easy enough to change.

## Validation Steps Performed

I added an adapter test that runs through a bunch of parameter
variations for the `DECDLD` sequence, to make sure we're correctly
detecting the font sizes for most of the known DEC terminal models.

I've also tested manually on a wide range of existing fonts, of varying
dimensions, and from multiple sources, and made sure they all worked
reasonably well.

Closes #9164
2021-08-06 20:41:02 +00:00
..
exe Persist inbox conhost; delegate control activities to it via a pipe (#10415) 2021-06-16 19:23:37 +00:00
ft_fuzzer Add a Fuzzing configuration and a version of conhost that can be fuzzed (#9604) 2021-03-29 14:23:30 +00:00
ft_host Merged PR 6140256: Migrate OSS up to 94d39b758 2021-06-09 23:03:04 +00:00
ft_integrity Fix a bunch of spelling errors across the project (#4295) 2020-02-10 20:40:01 +00:00
ft_uia Enable /Zc:preprocessor (#10593) 2021-07-13 23:00:11 +00:00
lib Implement Default Terminal (#7489) 2021-03-26 17:09:49 -05:00
proxy Persist inbox conhost; delegate control activities to it via a pipe (#10415) 2021-06-16 19:23:37 +00:00
ut_host Add support for downloadable soft fonts (#10011) 2021-08-06 20:41:02 +00:00
ut_lib Unify and clean up the common build properties (#3429) 2019-11-05 14:29:11 -08:00
_output.cpp Skip accessibility notifier and all event calculations when we're in PTY mode (#10569) 2021-07-09 18:45:44 +00:00
_output.h Initial release of the Windows Terminal source code 2019-05-02 15:29:04 -07:00
_stream.cpp Skip accessibility notifier and all event calculations when we're in PTY mode (#10569) 2021-07-09 18:45:44 +00:00
_stream.h WriteCharsLegacy: Add some notes in comments and rename WC_ECHO (#9605) 2021-03-24 16:26:50 -05:00
alias.cpp Change backslashes in include statements to forward slashes (#8205) 2020-11-25 21:02:10 +00:00
alias.h add clang-format conf to the project, format the c++ code (#1141) 2019-06-11 13:27:09 -07:00
ApiRoutines.h Change backslashes in include statements to forward slashes (#8205) 2020-11-25 21:02:10 +00:00
cmdline.cpp WriteCharsLegacy: Add some notes in comments and rename WC_ECHO (#9605) 2021-03-24 16:26:50 -05:00
cmdline.h WriteCharsLegacy: Add some notes in comments and rename WC_ECHO (#9605) 2021-03-24 16:26:50 -05:00
CommandListPopup.cpp Change backslashes in include statements to forward slashes (#8205) 2020-11-25 21:02:10 +00:00
CommandListPopup.hpp add clang-format conf to the project, format the c++ code (#1141) 2019-06-11 13:27:09 -07:00
CommandNumberPopup.cpp WriteCharsLegacy: Add some notes in comments and rename WC_ECHO (#9605) 2021-03-24 16:26:50 -05:00
CommandNumberPopup.hpp Add explicit identifier to some constructors (#5652) 2020-04-29 16:50:47 -07:00
conapi.h Change backslashes in include statements to forward slashes (#8205) 2020-11-25 21:02:10 +00:00
conareainfo.cpp Replace basic_string_view<T> with span<const T> (#6921) 2020-07-15 16:40:42 +00:00
conareainfo.h Improve the legacy color conversions (#6358) 2020-06-08 19:05:06 +00:00
conattrs.cpp Change backslashes in include statements to forward slashes (#8205) 2020-11-25 21:02:10 +00:00
conddkrefs.h add clang-format conf to the project, format the c++ code (#1141) 2019-06-11 13:27:09 -07:00
conhost.rcv Initial release of the Windows Terminal source code 2019-05-02 15:29:04 -07:00
conhostv2_traceviewpp.tvpp Initial release of the Windows Terminal source code 2019-05-02 15:29:04 -07:00
conimeinfo.cpp Skip accessibility notifier and all event calculations when we're in PTY mode (#10569) 2021-07-09 18:45:44 +00:00
conimeinfo.h Replace basic_string_view<T> with span<const T> (#6921) 2020-07-15 16:40:42 +00:00
conserv.h add clang-format conf to the project, format the c++ code (#1141) 2019-06-11 13:27:09 -07:00
ConsoleArguments.cpp Fix startup race of resizing ConPTY (#10449) 2021-06-22 19:23:16 +00:00
ConsoleArguments.hpp Fix startup race of resizing ConPTY (#10449) 2021-06-22 19:23:16 +00:00
consoleInformation.cpp Vectorize TextColor::GetColor (#10779) 2021-08-02 19:02:59 +00:00
conv.h add clang-format conf to the project, format the c++ code (#1141) 2019-06-11 13:27:09 -07:00
convarea.cpp Make sure we don't hide the cursor until the IME starts (#7673) 2020-09-18 19:25:39 +00:00
conwinuserrefs.h add clang-format conf to the project, format the c++ code (#1141) 2019-06-11 13:27:09 -07:00
CopyFromCharPopup.cpp add clang-format conf to the project, format the c++ code (#1141) 2019-06-11 13:27:09 -07:00
CopyFromCharPopup.hpp Add explicit identifier to some constructors (#5652) 2020-04-29 16:50:47 -07:00
CopyToCharPopup.cpp add clang-format conf to the project, format the c++ code (#1141) 2019-06-11 13:27:09 -07:00
CopyToCharPopup.hpp add clang-format conf to the project, format the c++ code (#1141) 2019-06-11 13:27:09 -07:00
CursorBlinker.cpp Skip accessibility notifier and all event calculations when we're in PTY mode (#10569) 2021-07-09 18:45:44 +00:00
CursorBlinker.hpp Initial release of the Windows Terminal source code 2019-05-02 15:29:04 -07:00
dbcs.cpp Replace gsl::at with a new til::at(span) for pre-checked bounds (#6925) 2020-07-15 10:29:36 -07:00
dbcs.h add clang-format conf to the project, format the c++ code (#1141) 2019-06-11 13:27:09 -07:00
directio.cpp Change backslashes in include statements to forward slashes (#8205) 2020-11-25 21:02:10 +00:00
directio.h Switch all DSR responses to appending instead of prepending (#7583) 2020-09-09 23:55:22 +00:00
dirs Merged PR 5677497: [Git2Git] Merged PR 5655213: Allow conhost to handoff to registered default app handler 2021-02-11 21:07:50 +00:00
getset.cpp Add support for downloadable soft fonts (#10011) 2021-08-06 20:41:02 +00:00
getset.h Add support for downloadable soft fonts (#10011) 2021-08-06 20:41:02 +00:00
globals.cpp Implement a pair of shims for cls, Clear-Host in conpty mode (#5627) 2020-04-30 21:53:31 +00:00
globals.h Persist inbox conhost; delegate control activities to it via a pipe (#10415) 2021-06-16 19:23:37 +00:00
handle.cpp Change backslashes in include statements to forward slashes (#8205) 2020-11-25 21:02:10 +00:00
handle.h Initial release of the Windows Terminal source code 2019-05-02 15:29:04 -07:00
history.cpp Change backslashes in include statements to forward slashes (#8205) 2020-11-25 21:02:10 +00:00
history.h Replace macros with constexpr part 2 (#3416) 2019-11-04 07:37:47 -06:00
host-common.vcxitems Implement Default Terminal (#7489) 2021-03-26 17:09:49 -05:00
IIoProvider.hpp Fix a bunch of spelling errors across the project (#4295) 2020-02-10 20:40:01 +00:00
init.cpp add clang-format conf to the project, format the c++ code (#1141) 2019-06-11 13:27:09 -07:00
init.hpp Initial release of the Windows Terminal source code 2019-05-02 15:29:04 -07:00
input.cpp Change backslashes in include statements to forward slashes (#8205) 2020-11-25 21:02:10 +00:00
input.h Replace macros with constexpr part 2 (#3416) 2019-11-04 07:37:47 -06:00
inputBuffer.cpp [Conpty] Pass through request for mouse mode to the Terminal (#9970) 2021-05-07 02:46:11 +00:00
inputBuffer.hpp [Conpty] Pass through request for mouse mode to the Terminal (#9970) 2021-05-07 02:46:11 +00:00
inputKeyInfo.cpp Initial release of the Windows Terminal source code 2019-05-02 15:29:04 -07:00
inputReadHandleData.cpp add clang-format conf to the project, format the c++ code (#1141) 2019-06-11 13:27:09 -07:00
inputReadHandleData.h add clang-format conf to the project, format the c++ code (#1141) 2019-06-11 13:27:09 -07:00
misc.cpp #10497: Do not force the font on output codepage change (#10591) 2021-07-08 21:10:35 +00:00
misc.h WriteCharsLegacy: Add some notes in comments and rename WC_ECHO (#9605) 2021-03-24 16:26:50 -05:00
ntprivapi.cpp Change NULL to nullptr since they are pointers (#4960) 2020-03-20 20:35:12 +00:00
ntprivapi.hpp add clang-format conf to the project, format the c++ code (#1141) 2019-06-11 13:27:09 -07:00
output.cpp Add support for double-width/double-height lines in conhost (#8664) 2021-02-18 05:44:50 +00:00
output.h add clang-format conf to the project, format the c++ code (#1141) 2019-06-11 13:27:09 -07:00
outputStream.cpp Add support for downloadable soft fonts (#10011) 2021-08-06 20:41:02 +00:00
outputStream.hpp Add support for downloadable soft fonts (#10011) 2021-08-06 20:41:02 +00:00
popup.cpp Change backslashes in include statements to forward slashes (#8205) 2020-11-25 21:02:10 +00:00
popup.h Improve the legacy color conversions (#6358) 2020-06-08 19:05:06 +00:00
precomp.cpp Initial release of the Windows Terminal source code 2019-05-02 15:29:04 -07:00
precomp.h Reduce Transient Allocations during Bulk Text Output (#8617) 2021-01-05 18:06:06 +00:00
PtySignalInputThread.cpp Fix startup race of resizing ConPTY (#10449) 2021-06-22 19:23:16 +00:00
PtySignalInputThread.hpp Fix startup race of resizing ConPTY (#10449) 2021-06-22 19:23:16 +00:00
readData.cpp Initial release of the Windows Terminal source code 2019-05-02 15:29:04 -07:00
readData.hpp Merged PR 6034984: Fix a crash caused by improper buffer management w/ multiple clients 2021-05-11 16:56:43 +00:00
readDataCooked.cpp Merged PR 6142815: OS build fixes on top of 94d39b758 2021-06-10 15:52:14 +00:00
readDataCooked.hpp Merged PR 6034984: Fix a crash caused by improper buffer management w/ multiple clients 2021-05-11 16:56:43 +00:00
readDataDirect.cpp Merged PR 6034984: Fix a crash caused by improper buffer management w/ multiple clients 2021-05-11 16:56:43 +00:00
readDataDirect.hpp Merged PR 6034984: Fix a crash caused by improper buffer management w/ multiple clients 2021-05-11 16:56:43 +00:00
readDataRaw.cpp Merged PR 6034984: Fix a crash caused by improper buffer management w/ multiple clients 2021-05-11 16:56:43 +00:00
readDataRaw.hpp Merged PR 6034984: Fix a crash caused by improper buffer management w/ multiple clients 2021-05-11 16:56:43 +00:00
registry.cpp Change backslashes in include statements to forward slashes (#8205) 2020-11-25 21:02:10 +00:00
registry.hpp add clang-format conf to the project, format the c++ code (#1141) 2019-06-11 13:27:09 -07:00
renderData.cpp Eliminate more transient allocations: Titles and invalid rectangles and bitmap runs and utf8 conversions (#8621) 2021-02-16 20:52:33 +00:00
renderData.hpp Expose Text Attributes to UI Automation (#10336) 2021-07-09 23:21:35 +00:00
renderFontDefaults.cpp Allow FontInfo{,Base,Desired} to store a font name > 32 wch (#3107) 2019-10-14 21:23:45 -07:00
renderFontDefaults.hpp Change backslashes in include statements to forward slashes (#8205) 2020-11-25 21:02:10 +00:00
res.rc Initial release of the Windows Terminal source code 2019-05-02 15:29:04 -07:00
resource.h add clang-format conf to the project, format the c++ code (#1141) 2019-06-11 13:27:09 -07:00
runft.bat Initial release of the Windows Terminal source code 2019-05-02 15:29:04 -07:00
runtests.bat Initial release of the Windows Terminal source code 2019-05-02 15:29:04 -07:00
runut.bat Initial release of the Windows Terminal source code 2019-05-02 15:29:04 -07:00
ScreenBufferRenderTarget.cpp Fix TerminalControl crash on exit (#10031) 2021-05-04 21:17:37 +00:00
ScreenBufferRenderTarget.hpp Fix TerminalControl crash on exit (#10031) 2021-05-04 21:17:37 +00:00
screenInfo.cpp Fix a use-after-free crash when returning from the alt buffer (#10878) 2021-08-05 13:08:51 +00:00
screenInfo.hpp Skip accessibility notifier and all event calculations when we're in PTY mode (#10569) 2021-07-09 18:45:44 +00:00
scrolling.cpp Change backslashes in include statements to forward slashes (#8205) 2020-11-25 21:02:10 +00:00
scrolling.hpp Initial release of the Windows Terminal source code 2019-05-02 15:29:04 -07:00
selection.cpp Skip accessibility notifier and all event calculations when we're in PTY mode (#10569) 2021-07-09 18:45:44 +00:00
selection.hpp Change backslashes in include statements to forward slashes (#8205) 2020-11-25 21:02:10 +00:00
selectionInput.cpp Fix color selection operations in conhost (#8577) 2020-12-14 19:45:49 +00:00
selectionState.cpp Change backslashes in include statements to forward slashes (#8205) 2020-11-25 21:02:10 +00:00
server.h Eliminate more transient allocations: Titles and invalid rectangles and bitmap runs and utf8 conversions (#8621) 2021-02-16 20:52:33 +00:00
settings.cpp Vectorize TextColor::GetColor (#10779) 2021-08-02 19:02:59 +00:00
settings.hpp Vectorize TextColor::GetColor (#10779) 2021-08-02 19:02:59 +00:00
sources.inc Merged PR 6176782: [Git2Git] Get rid of dead build macros/#defines FE_IME, W32_SB, etc. 2021-06-21 10:50:52 -07:00
sources.test.inc Initial release of the Windows Terminal source code 2019-05-02 15:29:04 -07:00
srvinit.cpp Pass inbound handoff message via heap so it cannot race out of scope by the time it reaches the ConsoleIoThread (#10751) 2021-07-22 12:51:30 +00:00
srvinit.h Persist inbox conhost; delegate control activities to it via a pipe (#10415) 2021-06-16 19:23:37 +00:00
stream.cpp Fix building with v143 toolchain (#10727) 2021-07-20 19:00:49 +02:00
stream.h Change backslashes in include statements to forward slashes (#8205) 2020-11-25 21:02:10 +00:00
telemetry.cpp Vectorize TextColor::GetColor (#10779) 2021-08-02 19:02:59 +00:00
telemetry.hpp Change backslashes in include statements to forward slashes (#8205) 2020-11-25 21:02:10 +00:00
tracing.cpp Reflect recent OS build changes, incl. a version of GH-10166 2021-06-09 22:57:38 +00:00
tracing.hpp Reflect recent OS build changes, incl. a version of GH-10166 2021-06-09 22:57:38 +00:00
utf8ToWideCharParser.cpp Fix a bunch of spelling errors across the project (#4295) 2020-02-10 20:40:01 +00:00
utf8ToWideCharParser.hpp add clang-format conf to the project, format the c++ code (#1141) 2019-06-11 13:27:09 -07:00
utils.cpp Change backslashes in include statements to forward slashes (#8205) 2020-11-25 21:02:10 +00:00
utils.hpp Change backslashes in include statements to forward slashes (#8205) 2020-11-25 21:02:10 +00:00
VtInputThread.cpp Add names to threads to make debugging a slight bit easier (#9801) 2021-04-14 10:56:52 +00:00
VtInputThread.hpp Change backslashes in include statements to forward slashes (#8205) 2020-11-25 21:02:10 +00:00
VtIo.cpp [Conpty] Pass through request for mouse mode to the Terminal (#9970) 2021-05-07 02:46:11 +00:00
VtIo.hpp Change backslashes in include statements to forward slashes (#8205) 2020-11-25 21:02:10 +00:00
writeData.cpp Merged PR 6034984: Fix a crash caused by improper buffer management w/ multiple clients 2021-05-11 16:56:43 +00:00
writeData.hpp Merged PR 6034984: Fix a crash caused by improper buffer management w/ multiple clients 2021-05-11 16:56:43 +00:00