xref: /aosp_15_r20/external/skia/tools/RuntimeBlendUtils.cpp (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17)
1*c8dee2aaSAndroid Build Coastguard Worker /*
2*c8dee2aaSAndroid Build Coastguard Worker  * Copyright 2021 Google Inc.
3*c8dee2aaSAndroid Build Coastguard Worker  *
4*c8dee2aaSAndroid Build Coastguard Worker  * Use of this source code is governed by a BSD-style license that can be
5*c8dee2aaSAndroid Build Coastguard Worker  * found in the LICENSE file.
6*c8dee2aaSAndroid Build Coastguard Worker  */
7*c8dee2aaSAndroid Build Coastguard Worker #include "tools/RuntimeBlendUtils.h"
8*c8dee2aaSAndroid Build Coastguard Worker 
9*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkBlendMode.h"
10*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkRefCnt.h"
11*c8dee2aaSAndroid Build Coastguard Worker #include "include/effects/SkRuntimeEffect.h"
12*c8dee2aaSAndroid Build Coastguard Worker 
GetRuntimeBlendForBlendMode(SkBlendMode mode)13*c8dee2aaSAndroid Build Coastguard Worker sk_sp<SkBlender> GetRuntimeBlendForBlendMode(SkBlendMode mode) {
14*c8dee2aaSAndroid Build Coastguard Worker     static auto result = SkRuntimeEffect::MakeForBlender(SkString(
15*c8dee2aaSAndroid Build Coastguard Worker         "uniform blender b;"
16*c8dee2aaSAndroid Build Coastguard Worker         "half4 main(half4 src, half4 dst) {"
17*c8dee2aaSAndroid Build Coastguard Worker             "return b.eval(src, dst);"
18*c8dee2aaSAndroid Build Coastguard Worker         "}"
19*c8dee2aaSAndroid Build Coastguard Worker     ));
20*c8dee2aaSAndroid Build Coastguard Worker 
21*c8dee2aaSAndroid Build Coastguard Worker     SkASSERTF(result.effect, "%s", result.errorText.c_str());
22*c8dee2aaSAndroid Build Coastguard Worker 
23*c8dee2aaSAndroid Build Coastguard Worker     SkRuntimeBlendBuilder builder(result.effect);
24*c8dee2aaSAndroid Build Coastguard Worker     builder.child("b") = SkBlender::Mode(mode);
25*c8dee2aaSAndroid Build Coastguard Worker     return builder.makeBlender();
26*c8dee2aaSAndroid Build Coastguard Worker }
27