diff options
Diffstat (limited to 'basegfx')
| -rw-r--r-- | basegfx/source/tools/systemdependentdata.cxx | 59 |
1 files changed, 34 insertions, 25 deletions
diff --git a/basegfx/source/tools/systemdependentdata.cxx b/basegfx/source/tools/systemdependentdata.cxx index 223b607ffae0..53b1465eaf55 100644 --- a/basegfx/source/tools/systemdependentdata.cxx +++ b/basegfx/source/tools/systemdependentdata.cxx @@ -77,39 +77,48 @@ namespace basegfx if(0 == mnCalculatedCycles) { const sal_Int64 nBytes(estimateUsageInBytes()); - const sal_uInt32 nSeconds = 60; // HoldCyclesInSeconds - // default is Seconds (minimal is one) - sal_uInt32 nResult(0 == nSeconds ? 1 : nSeconds); - - if(0 != nBytes) + // tdf#129845 as indicator for no need to buffer trivial data, stay at and + // return zero. As border, use 450 bytes. For polygons, this means to buffer + // starting with ca. 50 points (GDIPLUS uses 9 bytes per coordinate). For + // Bitmap data this means to more or less always buffer (as it was before). + // For the future, a more sophisticated differentioation may be added + if(nBytes > 450) { - // use sqrt to get some curved shape. With a default of 60s we get - // a single second at 3600 byte. To get close to 10mb, multiply by - // a corresponding scaling factor - const double fScaleToMB(3600.0 / (1024.0 * 1024.0 * 10.0)); - - // also use a multiplier to move the start point higher - const double fMultiplierSeconds(10.0); + const sal_uInt32 nSeconds = 60; // HoldCyclesInSeconds - // calculate - nResult = static_cast<sal_uInt32>((fMultiplierSeconds * nSeconds) / sqrt(nBytes * fScaleToMB)); + // default is Seconds (minimal is one) + sal_uInt32 nResult(0 == nSeconds ? 1 : nSeconds); - // minimal value is 1 - if(nResult < 1) + if(0 != nBytes) { - nResult = 1; + // use sqrt to get some curved shape. With a default of 60s we get + // a single second at 3600 byte. To get close to 10mb, multiply by + // a corresponding scaling factor + const double fScaleToMB(3600.0 / (1024.0 * 1024.0 * 10.0)); + + // also use a multiplier to move the start point higher + const double fMultiplierSeconds(10.0); + + // calculate + nResult = static_cast<sal_uInt32>((fMultiplierSeconds * nSeconds) / sqrt(nBytes * fScaleToMB)); + + // minimal value is 1 + if(nResult < 1) + { + nResult = 1; + } + + // maximal value is nSeconds + if(nResult > nSeconds) + { + nResult = nSeconds; + } } - // maximal value is nSeconds - if(nResult > nSeconds) - { - nResult = nSeconds; - } + // set locally (once, on-demand created, non-zero) + const_cast<SystemDependentData*>(this)->mnCalculatedCycles = nResult; } - - // set locally (once, on-demand created, non-zero) - const_cast<SystemDependentData*>(this)->mnCalculatedCycles = nResult; } return mnCalculatedCycles; |