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sw_engine gradient: support x/y scale for radial gradient

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Change-Id: Id725637e261642d0e92d100c73841278b7f44c1c
This commit is contained in:
Hermet Park 2020-07-23 20:56:05 +09:00
parent 5fdc1f7fc8
commit 76a7c900be
2 changed files with 18 additions and 3 deletions
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2
src/lib/sw_engine/tvgSwCommon.h
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@ -193,6 +193,8 @@ struct SwFill
uint32_t* ctable;
FillSpread spread;
float sx, sy;
bool translucent;
};

19
src/lib/sw_engine/tvgSwFill.cpp
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@ -130,12 +130,25 @@ bool _prepareRadial(SwFill* fill, const RadialGradient* radial, const Matrix* tr
if (radial->radial(&fill->radial.cx, &fill->radial.cy, &radius) != Result::Success) return false;
if (radius < FLT_EPSILON) return true;
fill->sx = 1.0f;
fill->sy = 1.0f;
if (transform) {
auto tx = fill->radial.cx * transform->e11 + fill->radial.cy * transform->e12 + transform->e13;
auto ty = fill->radial.cx * transform->e21 + fill->radial.cy * transform->e22 + transform->e23;
fill->radial.cx = tx;
fill->radial.cy = ty;
radius *= transform->e33;
auto sx = sqrt(pow(transform->e11, 2) + pow(transform->e21, 2));
auto sy = sqrt(pow(transform->e12, 2) + pow(transform->e22, 2));
//FIXME; Scale + Rotation is not working properly
radius *= sx;
if (fabsf(sx - sy) > FLT_EPSILON) {
fill->sx = sx;
fill->sy = sy;
}
}
fill->radial.a = radius * radius;
@ -190,8 +203,8 @@ void fillFetchRadial(const SwFill* fill, uint32_t* dst, uint32_t y, uint32_t x,
if (fill->radial.a < FLT_EPSILON) return;
//Rotation
auto rx = x + 0.5f - fill->radial.cx;
auto ry = y + 0.5f - fill->radial.cy;
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;