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Arithmetic xfermode stage.

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565 is identical, and as usual the old sRGB path was broken.  :)
It was unimplemented, so the default missing Sk4f implementation was mimicking Src.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2175133002

Review-Url: https://codereview.chromium.org/2175133002
This commit is contained in:
mtklein 2016-07-25 05:56:16 -07:00 committed by Commit bot
parent 2869847166
commit 05e3c39d93
1 changed files with 30 additions and 0 deletions
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30
src/effects/SkArithmeticMode.cpp
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@ -8,6 +8,7 @@
#include "SkArithmeticMode.h"
#include "SkColorPriv.h"
#include "SkNx.h"
#include "SkRasterPipeline.h"
#include "SkReadBuffer.h"
#include "SkString.h"
#include "SkUnPreMultiply.h"
@ -29,6 +30,11 @@ public:
void xfer32(SkPMColor[], const SkPMColor[], int count, const SkAlpha[]) const override;
bool onAppendStages(SkRasterPipeline* p) const override {
p->append(&Stage, this);
return true;
}
SK_TO_STRING_OVERRIDE()
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkArithmeticMode_scalar)
@ -39,6 +45,10 @@ public:
#endif
private:
static void SK_VECTORCALL Stage(SkRasterPipeline::Stage* st, size_t x,
Sk4f r, Sk4f g, Sk4f b, Sk4f a,
Sk4f dr, Sk4f dg, Sk4f db, Sk4f da);
void flatten(SkWriteBuffer& buffer) const override {
buffer.writeScalar(fK[0]);
buffer.writeScalar(fK[1]);
@ -64,6 +74,26 @@ sk_sp<SkFlattenable> SkArithmeticMode_scalar::CreateProc(SkReadBuffer& buffer) {
return SkArithmeticMode::Make(k1, k2, k3, k4, enforcePMColor);
}
void SK_VECTORCALL SkArithmeticMode_scalar::Stage(SkRasterPipeline::Stage* st, size_t x,
Sk4f r, Sk4f g, Sk4f b, Sk4f a,
Sk4f dr, Sk4f dg, Sk4f db, Sk4f da) {
auto self = st->ctx<const SkArithmeticMode_scalar*>();
const Sk4f k1 = self->fK[0],
k2 = self->fK[1],
k3 = self->fK[2],
k4 = self->fK[3];
r = k1*r*dr + k2*r + k3*dr + k4;
g = k1*g*dg + k2*g + k3*dg + k4;
b = k1*b*db + k2*b + k3*db + k4;
a = k1*a*da + k2*a + k3*da + k4;
// A later stage (clamp_01_premul) will pin and fEnforcePMColor for us.
st->next(x, r,g,b,a, dr,dg,db,da);
}
void SkArithmeticMode_scalar::xfer32(SkPMColor dst[], const SkPMColor src[],
int count, const SkAlpha aaCoverage[]) const {
const Sk4f k1 = fK[0] * (1/255.0f),