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joshualittac977922014-07-22 09:52:11 -07001/*
2 * Copyright 2014 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#include "GrMatrixConvolutionEffect.h"
Robert Phillips296b1cc2017-03-15 10:42:12 -04008
Robert Phillips646e4292017-06-13 12:44:56 -04009#include "GrTexture.h"
Hal Canary6f6961e2017-01-31 13:50:44 -050010#include "GrTextureProxy.h"
egdaniel64c47282015-11-13 06:54:19 -080011#include "glsl/GrGLSLFragmentProcessor.h"
egdaniel7ea439b2015-12-03 09:20:44 -080012#include "glsl/GrGLSLFragmentShaderBuilder.h"
egdaniel018fb622015-10-28 07:26:40 -070013#include "glsl/GrGLSLProgramDataManager.h"
egdaniel7ea439b2015-12-03 09:20:44 -080014#include "glsl/GrGLSLUniformHandler.h"
Brian Salomon94efbf52016-11-29 13:43:05 -050015#include "../private/GrGLSL.h"
joshualittac977922014-07-22 09:52:11 -070016
egdaniel64c47282015-11-13 06:54:19 -080017class GrGLMatrixConvolutionEffect : public GrGLSLFragmentProcessor {
joshualittac977922014-07-22 09:52:11 -070018public:
robertphillips9cdb9922016-02-03 12:25:40 -080019 void emitCode(EmitArgs&) override;
joshualittac977922014-07-22 09:52:11 -070020
Brian Salomon94efbf52016-11-29 13:43:05 -050021 static inline void GenKey(const GrProcessor&, const GrShaderCaps&, GrProcessorKeyBuilder*);
joshualittac977922014-07-22 09:52:11 -070022
wangyixb1daa862015-08-18 11:29:31 -070023protected:
Brian Salomonab015ef2017-04-04 10:15:51 -040024 void onSetData(const GrGLSLProgramDataManager&, const GrFragmentProcessor&) override;
joshualittac977922014-07-22 09:52:11 -070025
26private:
egdaniel018fb622015-10-28 07:26:40 -070027 typedef GrGLSLProgramDataManager::UniformHandle UniformHandle;
joshualittac977922014-07-22 09:52:11 -070028
joshualitt5ae5fc52014-07-29 12:59:27 -070029 UniformHandle fKernelUni;
30 UniformHandle fImageIncrementUni;
31 UniformHandle fKernelOffsetUni;
32 UniformHandle fGainUni;
33 UniformHandle fBiasUni;
34 GrTextureDomain::GLDomain fDomain;
joshualittac977922014-07-22 09:52:11 -070035
egdaniel64c47282015-11-13 06:54:19 -080036 typedef GrGLSLFragmentProcessor INHERITED;
joshualittac977922014-07-22 09:52:11 -070037};
38
wangyix7c157a92015-07-22 15:08:53 -070039void GrGLMatrixConvolutionEffect::emitCode(EmitArgs& args) {
robertphillipsbf536af2016-02-04 06:11:53 -080040 const GrMatrixConvolutionEffect& mce = args.fFp.cast<GrMatrixConvolutionEffect>();
41 const GrTextureDomain& domain = mce.domain();
42
43 int kWidth = mce.kernelSize().width();
44 int kHeight = mce.kernelSize().height();
45
egdaniele506ee62016-03-02 14:29:10 -080046 int arrayCount = (kWidth * kHeight + 3) / 4;
47 SkASSERT(4 * arrayCount >= kWidth * kHeight);
jvanverth78d6eb02016-03-02 13:21:16 -080048
egdaniel7ea439b2015-12-03 09:20:44 -080049 GrGLSLUniformHandler* uniformHandler = args.fUniformHandler;
cdalton5e58cee2016-02-11 12:49:47 -080050 fImageIncrementUni = uniformHandler->addUniform(kFragment_GrShaderFlag,
egdaniel7ea439b2015-12-03 09:20:44 -080051 kVec2f_GrSLType, kDefault_GrSLPrecision,
52 "ImageIncrement");
cdalton5e58cee2016-02-11 12:49:47 -080053 fKernelUni = uniformHandler->addUniformArray(kFragment_GrShaderFlag,
jvanverth78d6eb02016-03-02 13:21:16 -080054 kVec4f_GrSLType, kDefault_GrSLPrecision,
egdaniel7ea439b2015-12-03 09:20:44 -080055 "Kernel",
jvanverth78d6eb02016-03-02 13:21:16 -080056 arrayCount);
cdalton5e58cee2016-02-11 12:49:47 -080057 fKernelOffsetUni = uniformHandler->addUniform(kFragment_GrShaderFlag,
egdaniel7ea439b2015-12-03 09:20:44 -080058 kVec2f_GrSLType, kDefault_GrSLPrecision,
59 "KernelOffset");
cdalton5e58cee2016-02-11 12:49:47 -080060 fGainUni = uniformHandler->addUniform(kFragment_GrShaderFlag,
egdaniel7ea439b2015-12-03 09:20:44 -080061 kFloat_GrSLType, kDefault_GrSLPrecision, "Gain");
cdalton5e58cee2016-02-11 12:49:47 -080062 fBiasUni = uniformHandler->addUniform(kFragment_GrShaderFlag,
egdaniel7ea439b2015-12-03 09:20:44 -080063 kFloat_GrSLType, kDefault_GrSLPrecision, "Bias");
joshualittac977922014-07-22 09:52:11 -070064
egdaniel7ea439b2015-12-03 09:20:44 -080065 const char* kernelOffset = uniformHandler->getUniformCStr(fKernelOffsetUni);
66 const char* imgInc = uniformHandler->getUniformCStr(fImageIncrementUni);
67 const char* kernel = uniformHandler->getUniformCStr(fKernelUni);
68 const char* gain = uniformHandler->getUniformCStr(fGainUni);
69 const char* bias = uniformHandler->getUniformCStr(fBiasUni);
joshualittac977922014-07-22 09:52:11 -070070
cdalton85285412016-02-18 12:37:07 -080071 GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
bsalomon1a1aa932016-09-12 09:30:36 -070072 SkString coords2D = fragBuilder->ensureCoords2D(args.fTransformedCoords[0]);
egdaniel4ca2e602015-11-18 08:01:26 -080073 fragBuilder->codeAppend("vec4 sum = vec4(0, 0, 0, 0);");
74 fragBuilder->codeAppendf("vec2 coord = %s - %s * %s;", coords2D.c_str(), kernelOffset, imgInc);
75 fragBuilder->codeAppend("vec4 c;");
joshualitt5ae5fc52014-07-29 12:59:27 -070076
jvanverth78d6eb02016-03-02 13:21:16 -080077 const char* kVecSuffix[4] = { ".x", ".y", ".z", ".w" };
joshualitt5ae5fc52014-07-29 12:59:27 -070078 for (int y = 0; y < kHeight; y++) {
79 for (int x = 0; x < kWidth; x++) {
egdaniel4ca2e602015-11-18 08:01:26 -080080 GrGLSLShaderBuilder::ShaderBlock block(fragBuilder);
jvanverth78d6eb02016-03-02 13:21:16 -080081 int offset = y*kWidth + x;
82
halcanary9d524f22016-03-29 09:03:52 -070083 fragBuilder->codeAppendf("float k = %s[%d]%s;", kernel, offset / 4,
jvanverth78d6eb02016-03-02 13:21:16 -080084 kVecSuffix[offset & 0x3]);
joshualitt5ae5fc52014-07-29 12:59:27 -070085 SkString coord;
86 coord.printf("coord + vec2(%d, %d) * %s", x, y, imgInc);
egdaniela2e3e0f2015-11-19 07:23:45 -080087 fDomain.sampleTexture(fragBuilder,
egdaniel7ea439b2015-12-03 09:20:44 -080088 uniformHandler,
Brian Salomon1edc5b92016-11-29 13:43:46 -050089 args.fShaderCaps,
egdaniela2e3e0f2015-11-19 07:23:45 -080090 domain,
91 "c",
92 coord,
cdalton3f6f76f2016-04-11 12:18:09 -070093 args.fTexSamplers[0]);
robertphillipsbf536af2016-02-04 06:11:53 -080094 if (!mce.convolveAlpha()) {
egdaniel4ca2e602015-11-18 08:01:26 -080095 fragBuilder->codeAppend("c.rgb /= c.a;");
96 fragBuilder->codeAppend("c.rgb = clamp(c.rgb, 0.0, 1.0);");
joshualitt5ae5fc52014-07-29 12:59:27 -070097 }
egdaniel4ca2e602015-11-18 08:01:26 -080098 fragBuilder->codeAppend("sum += c * k;");
joshualitt5ae5fc52014-07-29 12:59:27 -070099 }
joshualittac977922014-07-22 09:52:11 -0700100 }
robertphillipsbf536af2016-02-04 06:11:53 -0800101 if (mce.convolveAlpha()) {
egdaniel4ca2e602015-11-18 08:01:26 -0800102 fragBuilder->codeAppendf("%s = sum * %s + %s;", args.fOutputColor, gain, bias);
Brian Salomona12c1532017-02-13 12:41:44 -0500103 fragBuilder->codeAppendf("%s.a = clamp(%s.a, 0, 1);", args.fOutputColor, args.fOutputColor);
egdaniel4ca2e602015-11-18 08:01:26 -0800104 fragBuilder->codeAppendf("%s.rgb = clamp(%s.rgb, 0.0, %s.a);",
105 args.fOutputColor, args.fOutputColor, args.fOutputColor);
joshualittac977922014-07-22 09:52:11 -0700106 } else {
egdaniela2e3e0f2015-11-19 07:23:45 -0800107 fDomain.sampleTexture(fragBuilder,
egdaniel7ea439b2015-12-03 09:20:44 -0800108 uniformHandler,
Brian Salomon1edc5b92016-11-29 13:43:46 -0500109 args.fShaderCaps,
egdaniela2e3e0f2015-11-19 07:23:45 -0800110 domain,
111 "c",
112 coords2D,
cdalton3f6f76f2016-04-11 12:18:09 -0700113 args.fTexSamplers[0]);
egdaniel4ca2e602015-11-18 08:01:26 -0800114 fragBuilder->codeAppendf("%s.a = c.a;", args.fOutputColor);
Brian Salomona12c1532017-02-13 12:41:44 -0500115 fragBuilder->codeAppendf("%s.rgb = clamp(sum.rgb * %s + %s, 0, 1);", args.fOutputColor, gain, bias);
egdaniel4ca2e602015-11-18 08:01:26 -0800116 fragBuilder->codeAppendf("%s.rgb *= %s.a;", args.fOutputColor, args.fOutputColor);
joshualittac977922014-07-22 09:52:11 -0700117 }
Ethan Nicholas2983f402017-05-08 09:36:08 -0400118 fragBuilder->codeAppendf("%s *= %s;\n", args.fOutputColor, args.fInputColor);
joshualittac977922014-07-22 09:52:11 -0700119}
120
joshualittb0a8a372014-09-23 09:50:21 -0700121void GrGLMatrixConvolutionEffect::GenKey(const GrProcessor& processor,
Brian Salomon94efbf52016-11-29 13:43:05 -0500122 const GrShaderCaps&, GrProcessorKeyBuilder* b) {
joshualittb0a8a372014-09-23 09:50:21 -0700123 const GrMatrixConvolutionEffect& m = processor.cast<GrMatrixConvolutionEffect>();
joshualitt5ae5fc52014-07-29 12:59:27 -0700124 SkASSERT(m.kernelSize().width() <= 0x7FFF && m.kernelSize().height() <= 0xFFFF);
125 uint32_t key = m.kernelSize().width() << 16 | m.kernelSize().height();
caryclark952538e2016-02-26 05:01:42 -0800126 key |= m.convolveAlpha() ? 1U << 31 : 0;
joshualittac977922014-07-22 09:52:11 -0700127 b->add32(key);
joshualitt5ae5fc52014-07-29 12:59:27 -0700128 b->add32(GrTextureDomain::GLDomain::DomainKey(m.domain()));
joshualittac977922014-07-22 09:52:11 -0700129}
130
egdaniel018fb622015-10-28 07:26:40 -0700131void GrGLMatrixConvolutionEffect::onSetData(const GrGLSLProgramDataManager& pdman,
Brian Salomonab015ef2017-04-04 10:15:51 -0400132 const GrFragmentProcessor& processor) {
joshualittb0a8a372014-09-23 09:50:21 -0700133 const GrMatrixConvolutionEffect& conv = processor.cast<GrMatrixConvolutionEffect>();
Robert Phillips9bee2e52017-05-29 12:37:20 -0400134 GrTexture* texture = conv.textureSampler(0).peekTexture();
robertphillipsbf536af2016-02-04 06:11:53 -0800135
joshualittac977922014-07-22 09:52:11 -0700136 float imageIncrement[2];
Brian Salomon0bbecb22016-11-17 11:38:22 -0500137 float ySign = texture->origin() == kTopLeft_GrSurfaceOrigin ? 1.0f : -1.0f;
138 imageIncrement[0] = 1.0f / texture->width();
139 imageIncrement[1] = ySign / texture->height();
kkinnunen7510b222014-07-30 00:04:16 -0700140 pdman.set2fv(fImageIncrementUni, 1, imageIncrement);
141 pdman.set2fv(fKernelOffsetUni, 1, conv.kernelOffset());
jvanverth78d6eb02016-03-02 13:21:16 -0800142 int kernelCount = conv.kernelSize().width() * conv.kernelSize().height();
143 int arrayCount = (kernelCount + 3) / 4;
144 SkASSERT(4 * arrayCount >= kernelCount);
145 pdman.set4fv(fKernelUni, arrayCount, conv.kernel());
kkinnunen7510b222014-07-30 00:04:16 -0700146 pdman.set1f(fGainUni, conv.gain());
147 pdman.set1f(fBiasUni, conv.bias());
Robert Phillipse98234f2017-01-09 14:23:59 -0500148 fDomain.setData(pdman, conv.domain(), texture);
joshualittac977922014-07-22 09:52:11 -0700149}
150
Robert Phillipsfbcef6e2017-06-15 12:07:18 -0400151GrMatrixConvolutionEffect::GrMatrixConvolutionEffect(sk_sp<GrTextureProxy> proxy,
Robert Phillips40fd7c92017-01-30 08:06:27 -0500152 const SkIRect& bounds,
153 const SkISize& kernelSize,
154 const SkScalar* kernel,
155 SkScalar gain,
156 SkScalar bias,
157 const SkIPoint& kernelOffset,
158 GrTextureDomain::Mode tileMode,
159 bool convolveAlpha)
160 // To advertise either the modulation or opaqueness optimizations we'd have to examine the
161 // parameters.
Robert Phillipsfbcef6e2017-06-15 12:07:18 -0400162 : INHERITED(kNone_OptimizationFlags, proxy, nullptr, SkMatrix::I())
Robert Phillips40fd7c92017-01-30 08:06:27 -0500163 , fKernelSize(kernelSize)
164 , fGain(SkScalarToFloat(gain))
165 , fBias(SkScalarToFloat(bias) / 255.0f)
166 , fConvolveAlpha(convolveAlpha)
167 , fDomain(proxy.get(), GrTextureDomain::MakeTexelDomainForMode(bounds, tileMode), tileMode) {
168 this->initClassID<GrMatrixConvolutionEffect>();
169 for (int i = 0; i < kernelSize.width() * kernelSize.height(); i++) {
170 fKernel[i] = SkScalarToFloat(kernel[i]);
171 }
172 fKernelOffset[0] = static_cast<float>(kernelOffset.x());
173 fKernelOffset[1] = static_cast<float>(kernelOffset.y());
174}
175
Brian Salomon94efbf52016-11-29 13:43:05 -0500176void GrMatrixConvolutionEffect::onGetGLSLProcessorKey(const GrShaderCaps& caps,
egdaniel57d3b032015-11-13 11:57:27 -0800177 GrProcessorKeyBuilder* b) const {
joshualitteb2a6762014-12-04 11:35:33 -0800178 GrGLMatrixConvolutionEffect::GenKey(*this, caps, b);
179}
180
egdaniel57d3b032015-11-13 11:57:27 -0800181GrGLSLFragmentProcessor* GrMatrixConvolutionEffect::onCreateGLSLInstance() const {
robertphillipsbf536af2016-02-04 06:11:53 -0800182 return new GrGLMatrixConvolutionEffect;
joshualittac977922014-07-22 09:52:11 -0700183}
184
bsalomon0e08fc12014-10-15 08:19:04 -0700185bool GrMatrixConvolutionEffect::onIsEqual(const GrFragmentProcessor& sBase) const {
joshualitt49586be2014-09-16 08:21:41 -0700186 const GrMatrixConvolutionEffect& s = sBase.cast<GrMatrixConvolutionEffect>();
bsalomon420d7e92014-10-16 09:18:09 -0700187 return fKernelSize == s.kernelSize() &&
joshualittac977922014-07-22 09:52:11 -0700188 !memcmp(fKernel, s.kernel(),
189 fKernelSize.width() * fKernelSize.height() * sizeof(float)) &&
190 fGain == s.gain() &&
191 fBias == s.bias() &&
192 fKernelOffset == s.kernelOffset() &&
joshualitt5ae5fc52014-07-29 12:59:27 -0700193 fConvolveAlpha == s.convolveAlpha() &&
194 fDomain == s.domain();
joshualittac977922014-07-22 09:52:11 -0700195}
196
Robert Phillips40fd7c92017-01-30 08:06:27 -0500197static void fill_in_2D_gaussian_kernel(float* kernel, int width, int height,
198 SkScalar sigmaX, SkScalar sigmaY) {
joshualitt5acfea72014-08-11 13:55:34 -0700199 SkASSERT(width * height <= MAX_KERNEL_SIZE);
Robert Phillips40fd7c92017-01-30 08:06:27 -0500200 const float sigmaXDenom = 1.0f / (2.0f * SkScalarToFloat(SkScalarSquare(sigmaX)));
201 const float sigmaYDenom = 1.0f / (2.0f * SkScalarToFloat(SkScalarSquare(sigmaY)));
202 const int xRadius = width / 2;
203 const int yRadius = height / 2;
204
joshualitt5acfea72014-08-11 13:55:34 -0700205 float sum = 0.0f;
joshualitt5acfea72014-08-11 13:55:34 -0700206 for (int x = 0; x < width; x++) {
Robert Phillips40fd7c92017-01-30 08:06:27 -0500207 float xTerm = static_cast<float>(x - xRadius);
208 xTerm = xTerm * xTerm * sigmaXDenom;
209 for (int y = 0; y < height; y++) {
210 float yTerm = static_cast<float>(y - yRadius);
211 float xyTerm = sk_float_exp(-(xTerm + yTerm * yTerm * sigmaYDenom));
212 // Note that the constant term (1/(sqrt(2*pi*sigma^2)) of the Gaussian
213 // is dropped here, since we renormalize the kernel below.
214 kernel[y * width + x] = xyTerm;
215 sum += xyTerm;
216 }
joshualitt5acfea72014-08-11 13:55:34 -0700217 }
218 // Normalize the kernel
219 float scale = 1.0f / sum;
220 for (int i = 0; i < width * height; ++i) {
221 kernel[i] *= scale;
222 }
Robert Phillips40fd7c92017-01-30 08:06:27 -0500223}
224
225
226// Static function to create a 2D convolution
Robert Phillips296b1cc2017-03-15 10:42:12 -0400227sk_sp<GrFragmentProcessor> GrMatrixConvolutionEffect::MakeGaussian(
Robert Phillips296b1cc2017-03-15 10:42:12 -0400228 sk_sp<GrTextureProxy> proxy,
229 const SkIRect& bounds,
230 const SkISize& kernelSize,
231 SkScalar gain,
232 SkScalar bias,
233 const SkIPoint& kernelOffset,
234 GrTextureDomain::Mode tileMode,
235 bool convolveAlpha,
236 SkScalar sigmaX,
237 SkScalar sigmaY) {
Robert Phillips40fd7c92017-01-30 08:06:27 -0500238 float kernel[MAX_KERNEL_SIZE];
239
240 fill_in_2D_gaussian_kernel(kernel, kernelSize.width(), kernelSize.height(), sigmaX, sigmaY);
241
242 return sk_sp<GrFragmentProcessor>(
Robert Phillipsfbcef6e2017-06-15 12:07:18 -0400243 new GrMatrixConvolutionEffect(std::move(proxy), bounds, kernelSize,
Robert Phillips296b1cc2017-03-15 10:42:12 -0400244 kernel, gain, bias, kernelOffset, tileMode, convolveAlpha));
Robert Phillips40fd7c92017-01-30 08:06:27 -0500245}
246
joshualittb0a8a372014-09-23 09:50:21 -0700247GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrMatrixConvolutionEffect);
joshualittac977922014-07-22 09:52:11 -0700248
Hal Canary6f6961e2017-01-31 13:50:44 -0500249#if GR_TEST_UTILS
bungeman06ca8ec2016-06-09 08:01:03 -0700250sk_sp<GrFragmentProcessor> GrMatrixConvolutionEffect::TestCreate(GrProcessorTestData* d) {
Robert Phillipsdbc8eeb2017-02-21 10:04:31 -0500251 int texIdx = d->fRandom->nextBool() ? GrProcessorUnitTest::kSkiaPMTextureIdx
252 : GrProcessorUnitTest::kAlphaTextureIdx;
253 sk_sp<GrTextureProxy> proxy = d->textureProxy(texIdx);
254
joshualitt0067ff52015-07-08 14:26:19 -0700255 int width = d->fRandom->nextRangeU(1, MAX_KERNEL_SIZE);
256 int height = d->fRandom->nextRangeU(1, MAX_KERNEL_SIZE / width);
joshualittac977922014-07-22 09:52:11 -0700257 SkISize kernelSize = SkISize::Make(width, height);
Ben Wagner7ecc5962016-11-02 17:07:33 -0400258 std::unique_ptr<SkScalar[]> kernel(new SkScalar[width * height]);
joshualittac977922014-07-22 09:52:11 -0700259 for (int i = 0; i < width * height; i++) {
joshualitt0067ff52015-07-08 14:26:19 -0700260 kernel.get()[i] = d->fRandom->nextSScalar1();
joshualittac977922014-07-22 09:52:11 -0700261 }
joshualitt0067ff52015-07-08 14:26:19 -0700262 SkScalar gain = d->fRandom->nextSScalar1();
263 SkScalar bias = d->fRandom->nextSScalar1();
264 SkIPoint kernelOffset = SkIPoint::Make(d->fRandom->nextRangeU(0, kernelSize.width()),
265 d->fRandom->nextRangeU(0, kernelSize.height()));
Robert Phillipsdbc8eeb2017-02-21 10:04:31 -0500266 SkIRect bounds = SkIRect::MakeXYWH(d->fRandom->nextRangeU(0, proxy->width()),
267 d->fRandom->nextRangeU(0, proxy->height()),
268 d->fRandom->nextRangeU(0, proxy->width()),
269 d->fRandom->nextRangeU(0, proxy->height()));
joshualitt0067ff52015-07-08 14:26:19 -0700270 GrTextureDomain::Mode tileMode =
271 static_cast<GrTextureDomain::Mode>(d->fRandom->nextRangeU(0, 2));
272 bool convolveAlpha = d->fRandom->nextBool();
Robert Phillipsfbcef6e2017-06-15 12:07:18 -0400273 return GrMatrixConvolutionEffect::Make(std::move(proxy),
bungeman06ca8ec2016-06-09 08:01:03 -0700274 bounds,
275 kernelSize,
276 kernel.get(),
277 gain,
278 bias,
279 kernelOffset,
280 tileMode,
281 convolveAlpha);
joshualittac977922014-07-22 09:52:11 -0700282}
Hal Canary6f6961e2017-01-31 13:50:44 -0500283#endif