egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2015 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 | |
Brian Salomon | 94efbf5 | 2016-11-29 13:43:05 -0500 | [diff] [blame] | 8 | #include "GrShaderCaps.h" |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 9 | #include "glsl/GrGLSLVarying.h" |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 10 | #include "glsl/GrGLSLProgramBuilder.h" |
| 11 | |
| 12 | void GrGLSLVaryingHandler::addPassThroughAttribute(const GrGeometryProcessor::Attribute* input, |
Chris Dalton | fdde34e | 2017-10-16 14:15:26 -0600 | [diff] [blame] | 13 | const char* output) { |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 14 | GrSLType type = GrVertexAttribTypeToSLType(input->fType); |
Chris Dalton | 2737288 | 2017-12-08 13:34:21 -0700 | [diff] [blame] | 15 | GrGLSLVarying v(type); |
Chris Dalton | fdde34e | 2017-10-16 14:15:26 -0600 | [diff] [blame] | 16 | this->addVarying(input->fName, &v); |
cdalton | c08f196 | 2016-02-12 12:14:06 -0800 | [diff] [blame] | 17 | this->writePassThroughAttribute(input, output, v); |
| 18 | } |
| 19 | |
| 20 | void GrGLSLVaryingHandler::addFlatPassThroughAttribute(const GrGeometryProcessor::Attribute* input, |
Chris Dalton | fdde34e | 2017-10-16 14:15:26 -0600 | [diff] [blame] | 21 | const char* output) { |
cdalton | c08f196 | 2016-02-12 12:14:06 -0800 | [diff] [blame] | 22 | GrSLType type = GrVertexAttribTypeToSLType(input->fType); |
Chris Dalton | 2737288 | 2017-12-08 13:34:21 -0700 | [diff] [blame] | 23 | GrGLSLVarying v(type); |
Chris Dalton | fdde34e | 2017-10-16 14:15:26 -0600 | [diff] [blame] | 24 | this->addFlatVarying(input->fName, &v); |
cdalton | c08f196 | 2016-02-12 12:14:06 -0800 | [diff] [blame] | 25 | this->writePassThroughAttribute(input, output, v); |
| 26 | } |
| 27 | |
| 28 | void GrGLSLVaryingHandler::writePassThroughAttribute(const GrGeometryProcessor::Attribute* input, |
| 29 | const char* output, const GrGLSLVarying& v) { |
csmartdalton | 276cc41 | 2016-11-21 11:55:00 -0700 | [diff] [blame] | 30 | SkASSERT(!fProgramBuilder->primitiveProcessor().willUseGeoShader()); |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 31 | fProgramBuilder->fVS.codeAppendf("%s = %s;", v.vsOut(), input->fName); |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 32 | fProgramBuilder->fFS.codeAppendf("%s = %s;", output, v.fsIn()); |
| 33 | } |
| 34 | |
Chris Dalton | fdde34e | 2017-10-16 14:15:26 -0600 | [diff] [blame] | 35 | void GrGLSLVaryingHandler::internalAddVarying(const char* name, GrGLSLVarying* varying, bool flat) { |
cdalton | c08f196 | 2016-02-12 12:14:06 -0800 | [diff] [blame] | 36 | bool willUseGeoShader = fProgramBuilder->primitiveProcessor().willUseGeoShader(); |
| 37 | VaryingInfo& v = fVaryings.push_back(); |
| 38 | |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 39 | SkASSERT(varying); |
Chris Dalton | 90e8fb1 | 2017-12-22 02:24:53 -0700 | [diff] [blame^] | 40 | SkASSERT(kVoid_GrSLType != varying->fType); |
cdalton | c08f196 | 2016-02-12 12:14:06 -0800 | [diff] [blame] | 41 | v.fType = varying->fType; |
cdalton | c08f196 | 2016-02-12 12:14:06 -0800 | [diff] [blame] | 42 | v.fIsFlat = flat; |
| 43 | fProgramBuilder->nameVariable(&v.fVsOut, 'v', name); |
| 44 | v.fVisibility = kNone_GrShaderFlags; |
Chris Dalton | 2737288 | 2017-12-08 13:34:21 -0700 | [diff] [blame] | 45 | if (varying->isInVertexShader()) { |
cdalton | c08f196 | 2016-02-12 12:14:06 -0800 | [diff] [blame] | 46 | varying->fVsOut = v.fVsOut.c_str(); |
| 47 | v.fVisibility |= kVertex_GrShaderFlag; |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 48 | } |
cdalton | c08f196 | 2016-02-12 12:14:06 -0800 | [diff] [blame] | 49 | if (willUseGeoShader) { |
| 50 | fProgramBuilder->nameVariable(&v.fGsOut, 'g', name); |
| 51 | varying->fGsIn = v.fVsOut.c_str(); |
| 52 | varying->fGsOut = v.fGsOut.c_str(); |
| 53 | v.fVisibility |= kGeometry_GrShaderFlag; |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 54 | } |
Chris Dalton | 2737288 | 2017-12-08 13:34:21 -0700 | [diff] [blame] | 55 | if (varying->isInFragmentShader()) { |
cdalton | c08f196 | 2016-02-12 12:14:06 -0800 | [diff] [blame] | 56 | varying->fFsIn = (willUseGeoShader ? v.fGsOut : v.fVsOut).c_str(); |
| 57 | v.fVisibility |= kFragment_GrShaderFlag; |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 58 | } |
| 59 | } |
| 60 | |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 61 | void GrGLSLVaryingHandler::emitAttributes(const GrGeometryProcessor& gp) { |
| 62 | int vaCount = gp.numAttribs(); |
| 63 | for (int i = 0; i < vaCount; i++) { |
| 64 | const GrGeometryProcessor::Attribute& attr = gp.getAttrib(i); |
| 65 | this->addAttribute(GrShaderVar(attr.fName, |
| 66 | GrVertexAttribTypeToSLType(attr.fType), |
Brian Salomon | f31ae49 | 2016-11-18 15:35:33 -0500 | [diff] [blame] | 67 | GrShaderVar::kIn_TypeModifier, |
Ethan Nicholas | fa7ee24 | 2017-09-25 09:52:04 -0400 | [diff] [blame] | 68 | GrShaderVar::kNonArray)); |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 69 | } |
| 70 | } |
| 71 | |
| 72 | void GrGLSLVaryingHandler::addAttribute(const GrShaderVar& var) { |
Brian Salomon | f31ae49 | 2016-11-18 15:35:33 -0500 | [diff] [blame] | 73 | SkASSERT(GrShaderVar::kIn_TypeModifier == var.getTypeModifier()); |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 74 | for (int j = 0; j < fVertexInputs.count(); ++j) { |
Brian Salomon | 99938a8 | 2016-11-21 13:41:08 -0500 | [diff] [blame] | 75 | const GrShaderVar& attr = fVertexInputs[j]; |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 76 | // if attribute already added, don't add it again |
| 77 | if (attr.getName().equals(var.getName())) { |
| 78 | return; |
| 79 | } |
| 80 | } |
| 81 | fVertexInputs.push_back(var); |
| 82 | } |
| 83 | |
cdalton | c08f196 | 2016-02-12 12:14:06 -0800 | [diff] [blame] | 84 | void GrGLSLVaryingHandler::setNoPerspective() { |
Brian Salomon | 94efbf5 | 2016-11-29 13:43:05 -0500 | [diff] [blame] | 85 | const GrShaderCaps& caps = *fProgramBuilder->shaderCaps(); |
cdalton | c08f196 | 2016-02-12 12:14:06 -0800 | [diff] [blame] | 86 | if (!caps.noperspectiveInterpolationSupport()) { |
| 87 | return; |
| 88 | } |
| 89 | if (const char* extension = caps.noperspectiveInterpolationExtensionString()) { |
cdalton | 8528541 | 2016-02-18 12:37:07 -0800 | [diff] [blame] | 90 | int bit = 1 << GrGLSLFragmentBuilder::kNoPerspectiveInterpolation_GLSLPrivateFeature; |
cdalton | c08f196 | 2016-02-12 12:14:06 -0800 | [diff] [blame] | 91 | fProgramBuilder->fVS.addFeature(bit, extension); |
| 92 | if (fProgramBuilder->primitiveProcessor().willUseGeoShader()) { |
| 93 | fProgramBuilder->fGS.addFeature(bit, extension); |
| 94 | } |
| 95 | fProgramBuilder->fFS.addFeature(bit, extension); |
| 96 | } |
| 97 | fDefaultInterpolationModifier = "noperspective"; |
| 98 | } |
| 99 | |
egdaniel | b80ec8b | 2016-02-09 09:54:43 -0800 | [diff] [blame] | 100 | void GrGLSLVaryingHandler::finalize() { |
cdalton | c08f196 | 2016-02-12 12:14:06 -0800 | [diff] [blame] | 101 | for (int i = 0; i < fVaryings.count(); ++i) { |
| 102 | const VaryingInfo& v = this->fVaryings[i]; |
| 103 | const char* modifier = v.fIsFlat ? "flat" : fDefaultInterpolationModifier; |
| 104 | if (v.fVisibility & kVertex_GrShaderFlag) { |
Brian Salomon | 99938a8 | 2016-11-21 13:41:08 -0500 | [diff] [blame] | 105 | fVertexOutputs.push_back().set(v.fType, v.fVsOut, GrShaderVar::kOut_TypeModifier, |
Chris Dalton | fdde34e | 2017-10-16 14:15:26 -0600 | [diff] [blame] | 106 | kDefault_GrSLPrecision, nullptr, modifier); |
cdalton | c08f196 | 2016-02-12 12:14:06 -0800 | [diff] [blame] | 107 | if (v.fVisibility & kGeometry_GrShaderFlag) { |
Brian Salomon | 99938a8 | 2016-11-21 13:41:08 -0500 | [diff] [blame] | 108 | fGeomInputs.push_back().set(v.fType, v.fVsOut, GrShaderVar::kUnsizedArray, |
Chris Dalton | fdde34e | 2017-10-16 14:15:26 -0600 | [diff] [blame] | 109 | GrShaderVar::kIn_TypeModifier, kDefault_GrSLPrecision, |
| 110 | nullptr, modifier); |
cdalton | c08f196 | 2016-02-12 12:14:06 -0800 | [diff] [blame] | 111 | } |
| 112 | } |
| 113 | if (v.fVisibility & kFragment_GrShaderFlag) { |
| 114 | const char* fsIn = v.fVsOut.c_str(); |
| 115 | if (v.fVisibility & kGeometry_GrShaderFlag) { |
Brian Salomon | 99938a8 | 2016-11-21 13:41:08 -0500 | [diff] [blame] | 116 | fGeomOutputs.push_back().set(v.fType, v.fGsOut, GrShaderVar::kOut_TypeModifier, |
Chris Dalton | fdde34e | 2017-10-16 14:15:26 -0600 | [diff] [blame] | 117 | kDefault_GrSLPrecision, nullptr, modifier); |
cdalton | c08f196 | 2016-02-12 12:14:06 -0800 | [diff] [blame] | 118 | fsIn = v.fGsOut.c_str(); |
| 119 | } |
Chris Dalton | fdde34e | 2017-10-16 14:15:26 -0600 | [diff] [blame] | 120 | fFragInputs.push_back().set(v.fType, fsIn, GrShaderVar::kIn_TypeModifier, |
| 121 | kDefault_GrSLPrecision, nullptr, modifier); |
cdalton | c08f196 | 2016-02-12 12:14:06 -0800 | [diff] [blame] | 122 | } |
| 123 | } |
egdaniel | b80ec8b | 2016-02-09 09:54:43 -0800 | [diff] [blame] | 124 | this->onFinalize(); |
| 125 | } |
| 126 | |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 127 | void GrGLSLVaryingHandler::appendDecls(const VarArray& vars, SkString* out) const { |
| 128 | for (int i = 0; i < vars.count(); ++i) { |
Brian Salomon | 94efbf5 | 2016-11-29 13:43:05 -0500 | [diff] [blame] | 129 | vars[i].appendDecl(fProgramBuilder->shaderCaps(), out); |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 130 | out->append(";"); |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | void GrGLSLVaryingHandler::getVertexDecls(SkString* inputDecls, SkString* outputDecls) const { |
| 135 | this->appendDecls(fVertexInputs, inputDecls); |
| 136 | this->appendDecls(fVertexOutputs, outputDecls); |
| 137 | } |
| 138 | |
| 139 | void GrGLSLVaryingHandler::getGeomDecls(SkString* inputDecls, SkString* outputDecls) const { |
| 140 | this->appendDecls(fGeomInputs, inputDecls); |
| 141 | this->appendDecls(fGeomOutputs, outputDecls); |
| 142 | } |
| 143 | |
| 144 | void GrGLSLVaryingHandler::getFragDecls(SkString* inputDecls, SkString* outputDecls) const { |
| 145 | // We should not have any outputs in the fragment shader when using version 1.10 |
Brian Salomon | 94efbf5 | 2016-11-29 13:43:05 -0500 | [diff] [blame] | 146 | SkASSERT(k110_GrGLSLGeneration != fProgramBuilder->shaderCaps()->generation() || |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 147 | fFragOutputs.empty()); |
| 148 | this->appendDecls(fFragInputs, inputDecls); |
| 149 | this->appendDecls(fFragOutputs, outputDecls); |
| 150 | } |