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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 "SkOpts.h"
#include "SkRasterPipeline.h"
SkRasterPipeline::SkRasterPipeline() {}
void SkRasterPipeline::append(StockStage stage, void* ctx) {
SkASSERT(stage != from_srgb);
fStages.push_back({stage, ctx});
}
void SkRasterPipeline::extend(const SkRasterPipeline& src) {
fStages.insert(fStages.end(),
src.fStages.begin(), src.fStages.end());
}
void SkRasterPipeline::run(size_t x, size_t n) const {
if (!fStages.empty()) {
#if defined(SK_JUMPER)
if (this->run_with_jumper(x, n)) {
return;
}
#endif
SkOpts::run_pipeline(x,n, fStages.data(), SkToInt(fStages.size()));
}
}
std::function<void(size_t, size_t)> SkRasterPipeline::compile() const {
return SkOpts::compile_pipeline(fStages.data(), SkToInt(fStages.size()));
}
void SkRasterPipeline::dump() const {
SkDebugf("SkRasterPipeline, %d stages\n", SkToInt(fStages.size()));
for (auto&& st : fStages) {
const char* name = "";
switch (st.stage) {
#define M(x) case x: name = #x; break;
SK_RASTER_PIPELINE_STAGES(M)
#undef M
}
SkDebugf("\t%s\n", name);
}
SkDebugf("\n");
}
// It's pretty easy to start with sound premultiplied linear floats, pack those
// to sRGB encoded bytes, then read them back to linear floats and find them not
// quite premultiplied, with a color channel just a smidge greater than the alpha
// channel. This can happen basically any time we have different transfer
// functions for alpha and colors... sRGB being the only one we draw into.
// This is an annoying problem with no known good solution. So apply the clamp hammer.
void SkRasterPipeline::append_from_srgb(SkAlphaType at) {
//this->append(from_srgb);
fStages.push_back({from_srgb, nullptr});
if (at == kPremul_SkAlphaType) {
this->append(SkRasterPipeline::clamp_a);
}
}
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