1 /*
2 * Copyright (c) 2024 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15 #include "ge_aibar_shader_filter.h"
16
17 #include <unordered_map>
18
19 #include "ge_log.h"
20 #include "include/core/SkTileMode.h"
21 #include "include/effects/SkImageFilters.h"
22 #include "src/core/SkOpts.h"
23
24 namespace OHOS {
25 namespace Rosen {
26
GEAIBarShaderFilter(const Drawing::GEAIBarShaderFilterParams & params)27 GEAIBarShaderFilter::GEAIBarShaderFilter(const Drawing::GEAIBarShaderFilterParams& params)
28 : aiBarLow_(params.aiBarLow), aiBarHigh_(params.aiBarHigh), aiBarThreshold_(params.aiBarThreshold),
29 aiBarOpacity_(params.aiBarOpacity), aiBarSaturation_(params.aiBarSaturation)
30 {}
31
GetDescription() const32 const std::string GEAIBarShaderFilter::GetDescription() const
33 {
34 return "GEAIBarShaderFilter";
35 }
36
ProcessImage(Drawing::Canvas & canvas,const std::shared_ptr<Drawing::Image> image,const Drawing::Rect & src,const Drawing::Rect & dst)37 std::shared_ptr<Drawing::Image> GEAIBarShaderFilter::ProcessImage(Drawing::Canvas& canvas,
38 const std::shared_ptr<Drawing::Image> image, const Drawing::Rect& src, const Drawing::Rect& dst)
39 {
40 if (image == nullptr) {
41 LOGE("GEAIBarShaderFilter::ProcessImage image is null");
42 return image;
43 }
44
45 Drawing::Matrix matrix;
46 auto imageShader = Drawing::ShaderEffect::CreateImageShader(*image, Drawing::TileMode::CLAMP,
47 Drawing::TileMode::CLAMP, Drawing::SamplingOptions(Drawing::FilterMode::LINEAR), matrix);
48 float imageWidth = image->GetWidth();
49 float imageHeight = image->GetHeight();
50 auto builder = MakeBinarizationShader(imageWidth, imageHeight, imageShader);
51 auto invertedImage = builder->MakeImage(canvas.GetGPUContext().get(), nullptr, image->GetImageInfo(), false);
52 if (invertedImage == nullptr) {
53 LOGE("GEAIBarShaderFilter::ProcessImage invertedImage is null");
54 return image;
55 }
56
57 return invertedImage;
58 }
59
MakeBinarizationShader(float imageWidth,float imageHeight,std::shared_ptr<Drawing::ShaderEffect> imageShader)60 std::shared_ptr<Drawing::RuntimeShaderBuilder> GEAIBarShaderFilter::MakeBinarizationShader(
61 float imageWidth, float imageHeight, std::shared_ptr<Drawing::ShaderEffect> imageShader)
62 {
63 static std::shared_ptr<Drawing::RuntimeEffect> binarizationShaderEffect_;
64
65 // coefficient of saturation borrowed from
66 // the saturate filter in RSProperties::GenerateColorFilter()
67 static constexpr char prog[] = R"(
68 uniform half low;
69 uniform half high;
70 uniform half threshold;
71 uniform half opacity;
72 uniform half saturation;
73 uniform shader imageShader;
74
75 const vec3 toLuminance = vec3(0.3086, 0.6094, 0.0820);
76
77 half4 main(float2 coord) {
78 half3 c = imageShader.eval(coord).rgb;
79 float gray = 0.299 * c.r + 0.587 * c.g + 0.114 * c.b;
80 float bin = mix(high, low, step(threshold, gray));
81 float luminance = dot(c, toLuminance);
82 half3 satAdjust = mix(vec3(luminance), c, saturation);
83 half3 res = satAdjust - (opacity + 1.0) * gray + bin;
84 return half4(mix(c, res, 0.42857), 1.0);
85 }
86 )";
87
88 if (binarizationShaderEffect_ == nullptr) {
89 binarizationShaderEffect_ = Drawing::RuntimeEffect::CreateForShader(prog);
90 if (binarizationShaderEffect_ == nullptr) {
91 LOGE("MakeBinarizationShader::RuntimeShader effect error\n");
92 return nullptr;
93 }
94 }
95 std::shared_ptr<Drawing::RuntimeShaderBuilder> builder =
96 std::make_shared<Drawing::RuntimeShaderBuilder>(binarizationShaderEffect_);
97 builder->SetChild("imageShader", imageShader);
98 builder->SetUniform("low", aiBarLow_); // aiInvertCoef[0] is low
99 builder->SetUniform("high", aiBarHigh_); // aiInvertCoef[1] is high
100 builder->SetUniform("threshold", aiBarThreshold_); // aiInvertCoef[2] is threshold
101 builder->SetUniform("opacity", aiBarOpacity_); // aiInvertCoef[3] is opacity
102 builder->SetUniform("saturation", aiBarSaturation_); // aiInvertCoef[4] is saturation
103
104 return builder;
105 }
106
107 } // namespace Rosen
108 } // namespace OHOS
109