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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkRasterPipeline.h"
SkRasterPipeline::SkRasterPipeline() {}
void SkRasterPipeline::append(SkRasterPipeline::Fn body_fn, const void* body_ctx,
SkRasterPipeline::Fn tail_fn, const void* tail_ctx) {
// Each stage holds its own context and the next function to call.
// So the pipeline itself has to hold onto the first function that starts the pipeline.
(fBody.empty() ? fBodyStart : fBody.back().fNext) = body_fn;
(fTail.empty() ? fTailStart : fTail.back().fNext) = tail_fn;
// Each last stage starts with its next function set to JustReturn as a safety net.
// It'll be overwritten by the next call to append().
fBody.push_back({ &JustReturn, const_cast<void*>(body_ctx) });
fTail.push_back({ &JustReturn, const_cast<void*>(tail_ctx) });
}
void SkRasterPipeline::extend(const SkRasterPipeline& src) {
SkASSERT(src.fBody.count() == src.fTail.count());
Fn body_fn = src.fBodyStart,
tail_fn = src.fTailStart;
for (int i = 0; i < src.fBody.count(); i++) {
this->append(body_fn, src.fBody[i].fCtx,
tail_fn, src.fTail[i].fCtx);
body_fn = src.fBody[i].fNext;
tail_fn = src.fTail[i].fNext;
}
}
void SkRasterPipeline::run(size_t x, size_t n) {
// It's fastest to start uninitialized if the compilers all let us. If not, next fastest is 0.
Sk4f v;
while (n >= 4) {
fBodyStart(fBody.begin(), x, v,v,v,v, v,v,v,v);
x += 4;
n -= 4;
}
while (n > 0) {
fTailStart(fTail.begin(), x, v,v,v,v, v,v,v,v);
x += 1;
n -= 1;
}
}
void SK_VECTORCALL SkRasterPipeline::JustReturn(Stage*, size_t, Sk4f,Sk4f,Sk4f,Sk4f,
Sk4f,Sk4f,Sk4f,Sk4f) {}
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