git_clone/thorvg
1
0
Fork 0
mirror of https://github.com/thorvg/thorvg.git synced 2025-06-13 19:44:28 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 5

sw_engine: 'inv2a' variable from the SwRadial struct replaced by 'inva'

Browse source 
This change reduces the number of multiplications in the fillFetchRadal function.
This commit is contained in:
Mira Grudzinska 2021-05-17 02:50:17 +02:00 • committed by Hermet Park
parent 706dc68d56
commit d999a05750
2 changed files with 6 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
src/lib/sw_engine/tvgSwCommon.h
View file

@ -148,7 +148,7 @@ struct SwFill
struct SwRadial {
float cx, cy;
float a;
float inv2a;
float inva;
};
union {

10
src/lib/sw_engine/tvgSwFill.cpp
View file

@ -156,7 +156,7 @@ bool _prepareRadial(SwFill* fill, const RadialGradient* radial, const Matrix* tr
}
fill->radial.a = radius * radius;
fill->radial.inv2a = pow(1 / (2 * fill->radial.a), 2);
fill->radial.inva = 1.0 / fill->radial.a;
return true;
}
@ -210,12 +210,12 @@ void fillFetchRadial(const SwFill* fill, uint32_t* dst, uint32_t y, uint32_t x,
//Rotation
auto rx = (x + 0.5f - fill->radial.cx) * fill->sy;
auto ry = (y + 0.5f - fill->radial.cy) * fill->sx;
auto inv2a = fill->radial.inv2a;
auto rxy = rx * rx + ry * ry;
auto rxryPlus = 2 * rx;
auto det = (-4 * fill->radial.a * -rxy) * inv2a;
auto detDelta = (4 * fill->radial.a * (rxryPlus + 1.0f)) * inv2a;
auto detDelta2 = (4 * fill->radial.a * 2.0f) * inv2a;
auto inva = fill->radial.inva;
auto det = rxy * inva;
auto detDelta = (rxryPlus + 1.0f) * inva;
auto detDelta2 = 2.0f * inva;
for (uint32_t i = 0 ; i < len ; ++i) {
*dst = _pixel(fill, sqrt(det));