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Diffstat (limited to 'doc/ScintillaDoc.html')
| -rw-r--r-- | doc/ScintillaDoc.html | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/doc/ScintillaDoc.html b/doc/ScintillaDoc.html index 58e8da944..932d26de8 100644 --- a/doc/ScintillaDoc.html +++ b/doc/ScintillaDoc.html @@ -7449,6 +7449,8 @@ sptr_t CallScintilla(unsigned int iMessage, uptr_t wParam, sptr_t lParam){ <a class="message" href="#SCI_GETLAYOUTCACHE">SCI_GETLAYOUTCACHE → int</a><br /> <a class="message" href="#SCI_SETPOSITIONCACHE">SCI_SETPOSITIONCACHE(int size)</a><br /> <a class="message" href="#SCI_GETPOSITIONCACHE">SCI_GETPOSITIONCACHE → int</a><br /> + <a class="message" href="#SCI_SETLAYOUTTHREADS">SCI_SETLAYOUTTHREADS(int threads)</a><br /> + <a class="message" href="#SCI_GETLAYOUTTHREADS">SCI_GETLAYOUTTHREADS → int</a><br /> <a class="message" href="#SCI_LINESSPLIT">SCI_LINESSPLIT(int pixelWidth)</a><br /> <a class="message" href="#SCI_LINESJOIN">SCI_LINESJOIN</a><br /> <a class="message" href="#SCI_WRAPCOUNT">SCI_WRAPCOUNT(line docLine) → line</a><br /> @@ -7687,6 +7689,21 @@ sptr_t CallScintilla(unsigned int iMessage, uptr_t wParam, sptr_t lParam){ so that their layout can be determined more quickly if the run recurs. The size in entries of this cache can be set with <code>SCI_SETPOSITIONCACHE</code>.</p> + <p><b id="SCI_SETLAYOUTTHREADS">SCI_SETLAYOUTTHREADS(int threads)</b><br /> + <b id="SCI_GETLAYOUTTHREADS">SCI_GETLAYOUTTHREADS → int</b><br /> + The time taken to measure text runs on wide lines can be improved by performing the task + concurrently on multiple threads when + <a class="seealso" href="#SCI_SUPPORTSFEATURE">SC_SUPPORTS_THREAD_SAFE_MEASURE_WIDTHS</a> + is available. + This can be a dramatic improvement - a 4 core processor is often able to reduce text layout time to just over one + quarter of the single-threaded time.</p> + <p>The default is to use just the main thread but applications may call <code>SCI_SETLAYOUTTHREADS</code> + to specify the maximum number of threads to use. + The number of threads is limited to the hardware concurrency of the system - + for a 4 core processor with hyper-threading that would be 8. + If an application just wants maximum concurrency then call with a large number + <code>SCI_SETLAYOUTTHREADS(1000)</code> and that will be reduced to a reasonable value.</p> + <p><b id="SCI_LINESSPLIT">SCI_LINESSPLIT(int pixelWidth)</b><br /> Split a range of lines indicated by the target into lines that are at most pixelWidth wide. Splitting occurs on word boundaries wherever possible in a similar manner to line wrapping. |