1 /*
2 * Copyright 2013 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "include/core/SkString.h"
9 #include "include/effects/SkLumaColorFilter.h"
10 #include "include/private/SkColorData.h"
11 #include "src/core/SkEffectPriv.h"
12 #include "src/core/SkRasterPipeline.h"
13 #include "src/core/SkVM.h"
14
15 #if SK_SUPPORT_GPU
16 #include "include/gpu/GrContext.h"
17 #include "src/gpu/effects/generated/GrLumaColorFilterEffect.h"
18 #include "src/gpu/glsl/GrGLSLFragmentProcessor.h"
19 #include "src/gpu/glsl/GrGLSLFragmentShaderBuilder.h"
20 #endif
21
onAppendStages(const SkStageRec & rec,bool shaderIsOpaque) const22 bool SkLumaColorFilter::onAppendStages(const SkStageRec& rec, bool shaderIsOpaque) const {
23 rec.fPipeline->append(SkRasterPipeline::bt709_luminance_or_luma_to_alpha);
24 rec.fPipeline->append(SkRasterPipeline::clamp_0);
25 rec.fPipeline->append(SkRasterPipeline::clamp_1);
26 return true;
27 }
28
onProgram(skvm::Builder * p,skvm::Color c,SkColorSpace * dstCS,skvm::Uniforms * uniforms,SkArenaAlloc * alloc) const29 skvm::Color SkLumaColorFilter::onProgram(skvm::Builder* p, skvm::Color c,
30 SkColorSpace* dstCS,
31 skvm::Uniforms* uniforms, SkArenaAlloc* alloc) const {
32 return {
33 p->splat(0.0f),
34 p->splat(0.0f),
35 p->splat(0.0f),
36 clamp01(c.r * 0.2126f + c.g * 0.7152f + c.b * 0.0722f),
37 };
38 }
39
Make()40 sk_sp<SkColorFilter> SkLumaColorFilter::Make() {
41 return sk_sp<SkColorFilter>(new SkLumaColorFilter);
42 }
43
SkLumaColorFilter()44 SkLumaColorFilter::SkLumaColorFilter() : INHERITED() {}
45
CreateProc(SkReadBuffer &)46 sk_sp<SkFlattenable> SkLumaColorFilter::CreateProc(SkReadBuffer&) {
47 return Make();
48 }
49
flatten(SkWriteBuffer &) const50 void SkLumaColorFilter::flatten(SkWriteBuffer&) const {}
51
52 #if SK_SUPPORT_GPU
asFragmentProcessor(GrRecordingContext *,const GrColorInfo &) const53 std::unique_ptr<GrFragmentProcessor> SkLumaColorFilter::asFragmentProcessor(
54 GrRecordingContext*, const GrColorInfo&) const {
55 return GrLumaColorFilterEffect::Make();
56 }
57 #endif
58