blob: 3a228f9f4f1c3f78f875ce20aef7e07edd2584d2 [file] [log] [blame]
/*
* 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 "include/core/SkData.h"
#include "include/effects/SkOverdrawColorFilter.h"
#include "include/effects/SkRuntimeEffect.h"
#include "include/private/SkColorData.h"
sk_sp<SkColorFilter> SkOverdrawColorFilter::MakeWithSkColors(const SkColor colors[kNumColors]) {
auto [effect, err] = SkRuntimeEffect::Make(SkString(R"(
uniform half4 color0;
uniform half4 color1;
uniform half4 color2;
uniform half4 color3;
uniform half4 color4;
uniform half4 color5;
void main(inout half4 color) {
half alpha = 255.0 * color.a;
color = alpha < 0.5 ? color0
: alpha < 1.5 ? color1
: alpha < 2.5 ? color2
: alpha < 3.5 ? color3
: alpha < 4.5 ? color4 : color5;
}
)"));
if (effect) {
auto data = SkData::MakeUninitialized(kNumColors * sizeof(SkPMColor4f));
SkPMColor4f* premul = (SkPMColor4f*)data->writable_data();
for (int i = 0; i < kNumColors; ++i) {
premul[i] = SkColor4f::FromColor(colors[i]).premul();
}
return effect->makeColorFilter(std::move(data));
}
return nullptr;
}