joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 1 | /* |
| 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 | |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 8 | #include "GrGLSLFragmentShaderBuilder.h" |
egdaniel | 574a4c1 | 2015-11-02 06:22:44 -0800 | [diff] [blame] | 9 | #include "GrRenderTarget.h" |
ethannicholas | 2279325 | 2016-01-30 09:59:10 -0800 | [diff] [blame] | 10 | #include "gl/GrGLGpu.h" |
egdaniel | cb7ba1e | 2015-10-26 08:38:25 -0700 | [diff] [blame] | 11 | #include "glsl/GrGLSL.h" |
jvanverth | cba99b8 | 2015-06-24 06:59:57 -0700 | [diff] [blame] | 12 | #include "glsl/GrGLSLCaps.h" |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 13 | #include "glsl/GrGLSLProgramBuilder.h" |
egdaniel | 7ea439b | 2015-12-03 09:20:44 -0800 | [diff] [blame] | 14 | #include "glsl/GrGLSLUniformHandler.h" |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 15 | #include "glsl/GrGLSLVarying.h" |
joshualitt | 47bb382 | 2014-10-07 16:43:25 -0700 | [diff] [blame] | 16 | |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 17 | const char* GrGLSLFragmentShaderBuilder::kDstTextureColorName = "_dstColor"; |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 18 | |
cdalton | 8917d62 | 2015-05-06 13:40:21 -0700 | [diff] [blame] | 19 | static const char* specific_layout_qualifier_name(GrBlendEquation equation) { |
| 20 | SkASSERT(GrBlendEquationIsAdvanced(equation)); |
| 21 | |
| 22 | static const char* kLayoutQualifierNames[] = { |
| 23 | "blend_support_screen", |
| 24 | "blend_support_overlay", |
| 25 | "blend_support_darken", |
| 26 | "blend_support_lighten", |
| 27 | "blend_support_colordodge", |
| 28 | "blend_support_colorburn", |
| 29 | "blend_support_hardlight", |
| 30 | "blend_support_softlight", |
| 31 | "blend_support_difference", |
| 32 | "blend_support_exclusion", |
| 33 | "blend_support_multiply", |
| 34 | "blend_support_hsl_hue", |
| 35 | "blend_support_hsl_saturation", |
| 36 | "blend_support_hsl_color", |
| 37 | "blend_support_hsl_luminosity" |
| 38 | }; |
| 39 | return kLayoutQualifierNames[equation - kFirstAdvancedGrBlendEquation]; |
| 40 | |
| 41 | GR_STATIC_ASSERT(0 == kScreen_GrBlendEquation - kFirstAdvancedGrBlendEquation); |
| 42 | GR_STATIC_ASSERT(1 == kOverlay_GrBlendEquation - kFirstAdvancedGrBlendEquation); |
| 43 | GR_STATIC_ASSERT(2 == kDarken_GrBlendEquation - kFirstAdvancedGrBlendEquation); |
| 44 | GR_STATIC_ASSERT(3 == kLighten_GrBlendEquation - kFirstAdvancedGrBlendEquation); |
| 45 | GR_STATIC_ASSERT(4 == kColorDodge_GrBlendEquation - kFirstAdvancedGrBlendEquation); |
| 46 | GR_STATIC_ASSERT(5 == kColorBurn_GrBlendEquation - kFirstAdvancedGrBlendEquation); |
| 47 | GR_STATIC_ASSERT(6 == kHardLight_GrBlendEquation - kFirstAdvancedGrBlendEquation); |
| 48 | GR_STATIC_ASSERT(7 == kSoftLight_GrBlendEquation - kFirstAdvancedGrBlendEquation); |
| 49 | GR_STATIC_ASSERT(8 == kDifference_GrBlendEquation - kFirstAdvancedGrBlendEquation); |
| 50 | GR_STATIC_ASSERT(9 == kExclusion_GrBlendEquation - kFirstAdvancedGrBlendEquation); |
| 51 | GR_STATIC_ASSERT(10 == kMultiply_GrBlendEquation - kFirstAdvancedGrBlendEquation); |
| 52 | GR_STATIC_ASSERT(11 == kHSLHue_GrBlendEquation - kFirstAdvancedGrBlendEquation); |
| 53 | GR_STATIC_ASSERT(12 == kHSLSaturation_GrBlendEquation - kFirstAdvancedGrBlendEquation); |
| 54 | GR_STATIC_ASSERT(13 == kHSLColor_GrBlendEquation - kFirstAdvancedGrBlendEquation); |
| 55 | GR_STATIC_ASSERT(14 == kHSLLuminosity_GrBlendEquation - kFirstAdvancedGrBlendEquation); |
| 56 | GR_STATIC_ASSERT(SK_ARRAY_COUNT(kLayoutQualifierNames) == |
bsalomon | f7cc877 | 2015-05-11 11:21:14 -0700 | [diff] [blame] | 57 | kGrBlendEquationCnt - kFirstAdvancedGrBlendEquation); |
cdalton | 8917d62 | 2015-05-06 13:40:21 -0700 | [diff] [blame] | 58 | } |
| 59 | |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 60 | GrGLSLFragmentShaderBuilder::FragPosKey |
| 61 | GrGLSLFragmentShaderBuilder::KeyForFragmentPosition(const GrRenderTarget* dst) { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 62 | if (kTopLeft_GrSurfaceOrigin == dst->origin()) { |
| 63 | return kTopLeftFragPosRead_FragPosKey; |
| 64 | } else { |
| 65 | return kBottomLeftFragPosRead_FragPosKey; |
| 66 | } |
| 67 | } |
| 68 | |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 69 | GrGLSLFragmentShaderBuilder::GrGLSLFragmentShaderBuilder(GrGLSLProgramBuilder* program, |
| 70 | uint8_t fragPosKey) |
cdalton | 8528541 | 2016-02-18 12:37:07 -0800 | [diff] [blame] | 71 | : GrGLSLFragmentBuilder(program) |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 72 | , fSetupFragPosition(false) |
joshualitt | 79f8fae | 2014-10-28 17:59:26 -0700 | [diff] [blame] | 73 | , fTopLeftFragPosRead(kTopLeftFragPosRead_FragPosKey == fragPosKey) |
cdalton | 8528541 | 2016-02-18 12:37:07 -0800 | [diff] [blame] | 74 | , fHasCustomColorOutput(false) |
joshualitt | b4384b9 | 2014-10-21 12:53:15 -0700 | [diff] [blame] | 75 | , fCustomColorOutputIndex(-1) |
cdalton | 8528541 | 2016-02-18 12:37:07 -0800 | [diff] [blame] | 76 | , fHasSecondaryOutput(false) |
cdalton | 33ad701 | 2016-02-22 07:55:44 -0800 | [diff] [blame^] | 77 | , fHasInitializedSampleMask(false) |
joshualitt | 47bb382 | 2014-10-07 16:43:25 -0700 | [diff] [blame] | 78 | , fHasReadDstColor(false) |
| 79 | , fHasReadFragmentPosition(false) { |
cdalton | 8528541 | 2016-02-18 12:37:07 -0800 | [diff] [blame] | 80 | fSubstageIndices.push_back(0); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 81 | } |
| 82 | |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 83 | bool GrGLSLFragmentShaderBuilder::enableFeature(GLSLFeature feature) { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 84 | switch (feature) { |
benjaminwagner | 1751dc7 | 2016-02-12 15:20:55 -0800 | [diff] [blame] | 85 | case kStandardDerivatives_GLSLFeature: { |
| 86 | if (!fProgramBuilder->glslCaps()->shaderDerivativeSupport()) { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 87 | return false; |
| 88 | } |
benjaminwagner | 1751dc7 | 2016-02-12 15:20:55 -0800 | [diff] [blame] | 89 | const char* extension = fProgramBuilder->glslCaps()->shaderDerivativeExtensionString(); |
| 90 | if (extension) { |
egdaniel | 574a4c1 | 2015-11-02 06:22:44 -0800 | [diff] [blame] | 91 | this->addFeature(1 << kStandardDerivatives_GLSLFeature, extension); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 92 | } |
| 93 | return true; |
benjaminwagner | 1751dc7 | 2016-02-12 15:20:55 -0800 | [diff] [blame] | 94 | } |
| 95 | case kPixelLocalStorage_GLSLFeature: { |
ethannicholas | 2279325 | 2016-01-30 09:59:10 -0800 | [diff] [blame] | 96 | if (fProgramBuilder->glslCaps()->pixelLocalStorageSize() <= 0) { |
| 97 | return false; |
| 98 | } |
| 99 | this->addFeature(1 << kPixelLocalStorage_GLSLFeature, |
| 100 | "GL_EXT_shader_pixel_local_storage"); |
| 101 | return true; |
benjaminwagner | 1751dc7 | 2016-02-12 15:20:55 -0800 | [diff] [blame] | 102 | } |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 103 | default: |
| 104 | SkFAIL("Unexpected GLSLFeature requested."); |
| 105 | return false; |
| 106 | } |
| 107 | } |
| 108 | |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 109 | SkString GrGLSLFragmentShaderBuilder::ensureFSCoords2D(const GrGLSLTransformedCoordsArray& coords, |
| 110 | int index) { |
joshualitt | 23e280d | 2014-09-18 12:26:38 -0700 | [diff] [blame] | 111 | if (kVec3f_GrSLType != coords[index].getType()) { |
| 112 | SkASSERT(kVec2f_GrSLType == coords[index].getType()); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 113 | return coords[index].getName(); |
| 114 | } |
| 115 | |
| 116 | SkString coords2D("coords2D"); |
| 117 | if (0 != index) { |
| 118 | coords2D.appendf("_%i", index); |
| 119 | } |
| 120 | this->codeAppendf("\tvec2 %s = %s.xy / %s.z;", |
| 121 | coords2D.c_str(), coords[index].c_str(), coords[index].c_str()); |
| 122 | return coords2D; |
| 123 | } |
| 124 | |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 125 | const char* GrGLSLFragmentShaderBuilder::fragmentPosition() { |
joshualitt | 47bb382 | 2014-10-07 16:43:25 -0700 | [diff] [blame] | 126 | fHasReadFragmentPosition = true; |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 127 | |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 128 | const GrGLSLCaps* glslCaps = fProgramBuilder->glslCaps(); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 129 | // We only declare "gl_FragCoord" when we're in the case where we want to use layout qualifiers |
| 130 | // to reverse y. Otherwise it isn't necessary and whether the "in" qualifier appears in the |
| 131 | // declaration varies in earlier GLSL specs. So it is simpler to omit it. |
| 132 | if (fTopLeftFragPosRead) { |
| 133 | fSetupFragPosition = true; |
| 134 | return "gl_FragCoord"; |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 135 | } else if (const char* extension = glslCaps->fragCoordConventionsExtensionString()) { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 136 | if (!fSetupFragPosition) { |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 137 | if (glslCaps->generation() < k150_GrGLSLGeneration) { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 138 | this->addFeature(1 << kFragCoordConventions_GLSLPrivateFeature, |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 139 | extension); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 140 | } |
| 141 | fInputs.push_back().set(kVec4f_GrSLType, |
egdaniel | 0d3f061 | 2015-10-21 10:45:48 -0700 | [diff] [blame] | 142 | GrGLSLShaderVar::kIn_TypeModifier, |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 143 | "gl_FragCoord", |
bsalomon | c0bd648 | 2014-12-09 10:04:14 -0800 | [diff] [blame] | 144 | kDefault_GrSLPrecision, |
egdaniel | ae47418 | 2016-01-21 11:19:52 -0800 | [diff] [blame] | 145 | "origin_upper_left"); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 146 | fSetupFragPosition = true; |
| 147 | } |
| 148 | return "gl_FragCoord"; |
| 149 | } else { |
robertphillips | 18c58c7 | 2015-07-21 12:06:52 -0700 | [diff] [blame] | 150 | static const char* kTempName = "tmpXYFragCoord"; |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 151 | static const char* kCoordName = "fragCoordYDown"; |
| 152 | if (!fSetupFragPosition) { |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 153 | const char* rtHeightName; |
| 154 | |
egdaniel | 7ea439b | 2015-12-03 09:20:44 -0800 | [diff] [blame] | 155 | fProgramBuilder->addRTHeightUniform("RTHeight", &rtHeightName); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 156 | |
robertphillips | 18c58c7 | 2015-07-21 12:06:52 -0700 | [diff] [blame] | 157 | // The Adreno compiler seems to be very touchy about access to "gl_FragCoord". |
| 158 | // Accessing glFragCoord.zw can cause a program to fail to link. Additionally, |
| 159 | // depending on the surrounding code, accessing .xy with a uniform involved can |
| 160 | // do the same thing. Copying gl_FragCoord.xy into a temp vec2 beforehand |
| 161 | // (and only accessing .xy) seems to "fix" things. |
ethannicholas | 1cbb5ea | 2015-12-14 11:37:55 -0800 | [diff] [blame] | 162 | const char* precision = glslCaps->usesPrecisionModifiers() ? "highp " : ""; |
| 163 | this->codePrependf("\t%svec4 %s = vec4(%s.x, %s - %s.y, 1.0, 1.0);\n", |
| 164 | precision, kCoordName, kTempName, rtHeightName, kTempName); |
| 165 | this->codePrependf("%svec2 %s = gl_FragCoord.xy;", precision, kTempName); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 166 | fSetupFragPosition = true; |
| 167 | } |
| 168 | SkASSERT(fProgramBuilder->fUniformHandles.fRTHeightUni.isValid()); |
| 169 | return kCoordName; |
| 170 | } |
| 171 | } |
| 172 | |
cdalton | 33ad701 | 2016-02-22 07:55:44 -0800 | [diff] [blame^] | 173 | void GrGLSLFragmentShaderBuilder::maskSampleCoverage(const char* mask, bool invert) { |
| 174 | const GrGLSLCaps& glslCaps = *fProgramBuilder->glslCaps(); |
| 175 | if (!glslCaps.sampleVariablesSupport()) { |
| 176 | SkDEBUGFAIL("Attempted to mask sample coverage without support."); |
| 177 | return; |
| 178 | } |
| 179 | if (const char* extension = glslCaps.sampleVariablesExtensionString()) { |
| 180 | this->addFeature(1 << kSampleVariables_GLSLPrivateFeature, extension); |
| 181 | } |
| 182 | if (!fHasInitializedSampleMask) { |
| 183 | this->codePrependf("gl_SampleMask[0] = -1;"); |
| 184 | fHasInitializedSampleMask = true; |
| 185 | } |
| 186 | if (invert) { |
| 187 | this->codeAppendf("gl_SampleMask[0] &= ~(%s);", mask); |
| 188 | } else { |
| 189 | this->codeAppendf("gl_SampleMask[0] &= %s;", mask); |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | void GrGLSLFragmentShaderBuilder::overrideSampleCoverage(const char* mask) { |
| 194 | const GrGLSLCaps& glslCaps = *fProgramBuilder->glslCaps(); |
| 195 | if (!glslCaps.sampleMaskOverrideCoverageSupport()) { |
| 196 | SkDEBUGFAIL("Attempted to override sample coverage without support."); |
| 197 | return; |
| 198 | } |
| 199 | SkASSERT(glslCaps.sampleVariablesSupport()); |
| 200 | if (const char* extension = glslCaps.sampleVariablesExtensionString()) { |
| 201 | this->addFeature(1 << kSampleVariables_GLSLPrivateFeature, extension); |
| 202 | } |
| 203 | if (this->addFeature(1 << kSampleMaskOverrideCoverage_GLSLPrivateFeature, |
| 204 | "GL_NV_sample_mask_override_coverage")) { |
| 205 | // Redeclare gl_SampleMask with layout(override_coverage) if we haven't already. |
| 206 | fOutputs.push_back().set(kInt_GrSLType, GrShaderVar::kOut_TypeModifier, |
| 207 | "gl_SampleMask", 1, kHigh_GrSLPrecision, |
| 208 | "override_coverage"); |
| 209 | } |
| 210 | this->codeAppendf("gl_SampleMask[0] = %s;", mask); |
| 211 | fHasInitializedSampleMask = true; |
| 212 | } |
| 213 | |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 214 | const char* GrGLSLFragmentShaderBuilder::dstColor() { |
joshualitt | 47bb382 | 2014-10-07 16:43:25 -0700 | [diff] [blame] | 215 | fHasReadDstColor = true; |
| 216 | |
ethannicholas | 2279325 | 2016-01-30 09:59:10 -0800 | [diff] [blame] | 217 | const char* override = fProgramBuilder->primitiveProcessor().getDestColorOverride(); |
| 218 | if (override != nullptr) { |
| 219 | return override; |
| 220 | } |
| 221 | |
egdaniel | 472d44e | 2015-10-22 08:20:00 -0700 | [diff] [blame] | 222 | const GrGLSLCaps* glslCaps = fProgramBuilder->glslCaps(); |
| 223 | if (glslCaps->fbFetchSupport()) { |
cdalton | c08f196 | 2016-02-12 12:14:06 -0800 | [diff] [blame] | 224 | this->addFeature(1 << kFramebufferFetch_GLSLPrivateFeature, |
egdaniel | 472d44e | 2015-10-22 08:20:00 -0700 | [diff] [blame] | 225 | glslCaps->fbFetchExtensionString()); |
joshualitt | b4384b9 | 2014-10-21 12:53:15 -0700 | [diff] [blame] | 226 | |
joshualitt | 3c1096f | 2015-01-13 13:13:59 -0800 | [diff] [blame] | 227 | // Some versions of this extension string require declaring custom color output on ES 3.0+ |
egdaniel | 472d44e | 2015-10-22 08:20:00 -0700 | [diff] [blame] | 228 | const char* fbFetchColorName = glslCaps->fbFetchColorName(); |
| 229 | if (glslCaps->fbFetchNeedsCustomOutput()) { |
joshualitt | b4384b9 | 2014-10-21 12:53:15 -0700 | [diff] [blame] | 230 | this->enableCustomOutput(); |
| 231 | fOutputs[fCustomColorOutputIndex].setTypeModifier(GrShaderVar::kInOut_TypeModifier); |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 232 | fbFetchColorName = DeclaredColorOutputName(); |
joshualitt | b4384b9 | 2014-10-21 12:53:15 -0700 | [diff] [blame] | 233 | } |
| 234 | return fbFetchColorName; |
bsalomon | 50785a3 | 2015-02-06 07:02:37 -0800 | [diff] [blame] | 235 | } else { |
bsalomon | 6a44c6a | 2015-05-26 09:49:05 -0700 | [diff] [blame] | 236 | return kDstTextureColorName; |
bsalomon | 50785a3 | 2015-02-06 07:02:37 -0800 | [diff] [blame] | 237 | } |
joshualitt | 47bb382 | 2014-10-07 16:43:25 -0700 | [diff] [blame] | 238 | } |
| 239 | |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 240 | void GrGLSLFragmentShaderBuilder::enableAdvancedBlendEquationIfNeeded(GrBlendEquation equation) { |
cdalton | 8917d62 | 2015-05-06 13:40:21 -0700 | [diff] [blame] | 241 | SkASSERT(GrBlendEquationIsAdvanced(equation)); |
| 242 | |
egdaniel | 472d44e | 2015-10-22 08:20:00 -0700 | [diff] [blame] | 243 | const GrGLSLCaps& caps = *fProgramBuilder->glslCaps(); |
cdalton | 8917d62 | 2015-05-06 13:40:21 -0700 | [diff] [blame] | 244 | if (!caps.mustEnableAdvBlendEqs()) { |
| 245 | return; |
| 246 | } |
| 247 | |
| 248 | this->addFeature(1 << kBlendEquationAdvanced_GLSLPrivateFeature, |
| 249 | "GL_KHR_blend_equation_advanced"); |
| 250 | if (caps.mustEnableSpecificAdvBlendEqs()) { |
| 251 | this->addLayoutQualifier(specific_layout_qualifier_name(equation), kOut_InterfaceQualifier); |
| 252 | } else { |
| 253 | this->addLayoutQualifier("blend_support_all_equations", kOut_InterfaceQualifier); |
| 254 | } |
| 255 | } |
| 256 | |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 257 | void GrGLSLFragmentShaderBuilder::enableCustomOutput() { |
joshualitt | b4384b9 | 2014-10-21 12:53:15 -0700 | [diff] [blame] | 258 | if (!fHasCustomColorOutput) { |
| 259 | fHasCustomColorOutput = true; |
| 260 | fCustomColorOutputIndex = fOutputs.count(); |
| 261 | fOutputs.push_back().set(kVec4f_GrSLType, |
egdaniel | 0d3f061 | 2015-10-21 10:45:48 -0700 | [diff] [blame] | 262 | GrGLSLShaderVar::kOut_TypeModifier, |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 263 | DeclaredColorOutputName()); |
egdaniel | b80ec8b | 2016-02-09 09:54:43 -0800 | [diff] [blame] | 264 | fProgramBuilder->finalizeFragmentOutputColor(fOutputs.back()); |
joshualitt | b4384b9 | 2014-10-21 12:53:15 -0700 | [diff] [blame] | 265 | } |
joshualitt | 47bb382 | 2014-10-07 16:43:25 -0700 | [diff] [blame] | 266 | } |
| 267 | |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 268 | void GrGLSLFragmentShaderBuilder::enableSecondaryOutput() { |
joshualitt | 47bb382 | 2014-10-07 16:43:25 -0700 | [diff] [blame] | 269 | SkASSERT(!fHasSecondaryOutput); |
| 270 | fHasSecondaryOutput = true; |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 271 | const GrGLSLCaps& caps = *fProgramBuilder->glslCaps(); |
| 272 | if (const char* extension = caps.secondaryOutputExtensionString()) { |
| 273 | this->addFeature(1 << kBlendFuncExtended_GLSLPrivateFeature, extension); |
kkinnunen | d94708e | 2015-07-30 22:47:04 -0700 | [diff] [blame] | 274 | } |
| 275 | |
| 276 | // If the primary output is declared, we must declare also the secondary output |
| 277 | // and vice versa, since it is not allowed to use a built-in gl_FragColor and a custom |
| 278 | // output. The condition also co-incides with the condition in whici GLES SL 2.0 |
| 279 | // requires the built-in gl_SecondaryFragColorEXT, where as 3.0 requires a custom output. |
kkinnunen | d94708e | 2015-07-30 22:47:04 -0700 | [diff] [blame] | 280 | if (caps.mustDeclareFragmentShaderOutput()) { |
egdaniel | 0d3f061 | 2015-10-21 10:45:48 -0700 | [diff] [blame] | 281 | fOutputs.push_back().set(kVec4f_GrSLType, GrGLSLShaderVar::kOut_TypeModifier, |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 282 | DeclaredSecondaryColorOutputName()); |
egdaniel | b80ec8b | 2016-02-09 09:54:43 -0800 | [diff] [blame] | 283 | fProgramBuilder->finalizeFragmentSecondaryColor(fOutputs.back()); |
kkinnunen | d94708e | 2015-07-30 22:47:04 -0700 | [diff] [blame] | 284 | } |
joshualitt | 47bb382 | 2014-10-07 16:43:25 -0700 | [diff] [blame] | 285 | } |
| 286 | |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 287 | const char* GrGLSLFragmentShaderBuilder::getPrimaryColorOutputName() const { |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 288 | return fHasCustomColorOutput ? DeclaredColorOutputName() : "gl_FragColor"; |
joshualitt | 47bb382 | 2014-10-07 16:43:25 -0700 | [diff] [blame] | 289 | } |
| 290 | |
ethannicholas | 2279325 | 2016-01-30 09:59:10 -0800 | [diff] [blame] | 291 | void GrGLSLFragmentBuilder::declAppendf(const char* fmt, ...) { |
| 292 | va_list argp; |
| 293 | va_start(argp, fmt); |
| 294 | inputs().appendVAList(fmt, argp); |
| 295 | va_end(argp); |
| 296 | } |
| 297 | |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 298 | const char* GrGLSLFragmentShaderBuilder::getSecondaryColorOutputName() const { |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 299 | const GrGLSLCaps& caps = *fProgramBuilder->glslCaps(); |
| 300 | return caps.mustDeclareFragmentShaderOutput() ? DeclaredSecondaryColorOutputName() |
kkinnunen | d94708e | 2015-07-30 22:47:04 -0700 | [diff] [blame] | 301 | : "gl_SecondaryFragColorEXT"; |
joshualitt | 47bb382 | 2014-10-07 16:43:25 -0700 | [diff] [blame] | 302 | } |
| 303 | |
egdaniel | 2d721d3 | 2015-11-11 13:06:05 -0800 | [diff] [blame] | 304 | void GrGLSLFragmentShaderBuilder::onFinalize() { |
egdaniel | 0eafe79 | 2015-11-20 14:01:22 -0800 | [diff] [blame] | 305 | fProgramBuilder->varyingHandler()->getFragDecls(&this->inputs(), &this->outputs()); |
egdaniel | cb7ba1e | 2015-10-26 08:38:25 -0700 | [diff] [blame] | 306 | GrGLSLAppendDefaultFloatPrecisionDeclaration(kDefault_GrSLPrecision, |
| 307 | *fProgramBuilder->glslCaps(), |
| 308 | &this->precisionQualifier()); |
joshualitt | 30ba436 | 2014-08-21 20:18:45 -0700 | [diff] [blame] | 309 | } |
| 310 | |
cdalton | 8528541 | 2016-02-18 12:37:07 -0800 | [diff] [blame] | 311 | void GrGLSLFragmentShaderBuilder::onBeforeChildProcEmitCode() { |
wangyix | 54a6b1a | 2015-09-08 08:41:51 -0700 | [diff] [blame] | 312 | SkASSERT(fSubstageIndices.count() >= 1); |
wangyix | 7ef45a1 | 2015-08-13 06:51:35 -0700 | [diff] [blame] | 313 | fSubstageIndices.push_back(0); |
wangyix | 54a6b1a | 2015-09-08 08:41:51 -0700 | [diff] [blame] | 314 | // second-to-last value in the fSubstageIndices stack is the index of the child proc |
| 315 | // at that level which is currently emitting code. |
| 316 | fMangleString.appendf("_c%d", fSubstageIndices[fSubstageIndices.count() - 2]); |
wangyix | 7ef45a1 | 2015-08-13 06:51:35 -0700 | [diff] [blame] | 317 | } |
| 318 | |
cdalton | 8528541 | 2016-02-18 12:37:07 -0800 | [diff] [blame] | 319 | void GrGLSLFragmentShaderBuilder::onAfterChildProcEmitCode() { |
wangyix | 54a6b1a | 2015-09-08 08:41:51 -0700 | [diff] [blame] | 320 | SkASSERT(fSubstageIndices.count() >= 2); |
wangyix | 7ef45a1 | 2015-08-13 06:51:35 -0700 | [diff] [blame] | 321 | fSubstageIndices.pop_back(); |
wangyix | 54a6b1a | 2015-09-08 08:41:51 -0700 | [diff] [blame] | 322 | fSubstageIndices.back()++; |
wangyix | 7ef45a1 | 2015-08-13 06:51:35 -0700 | [diff] [blame] | 323 | int removeAt = fMangleString.findLastOf('_'); |
| 324 | fMangleString.remove(removeAt, fMangleString.size() - removeAt); |
| 325 | } |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 326 | |