egdaniel | 378092f | 2014-12-03 10:40:13 -0800 | [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 | ced9010 | 2014-12-05 12:40:52 -0800 | [diff] [blame] | 8 | #include "effects/GrPorterDuffXferProcessor.h" |
egdaniel | 378092f | 2014-12-03 10:40:13 -0800 | [diff] [blame] | 9 | |
egdaniel | 9513143 | 2014-12-09 11:15:43 -0800 | [diff] [blame] | 10 | #include "GrBlend.h" |
bsalomon | eb1cb5c | 2015-05-22 08:01:09 -0700 | [diff] [blame] | 11 | #include "GrCaps.h" |
egdaniel | 378092f | 2014-12-03 10:40:13 -0800 | [diff] [blame] | 12 | #include "GrProcessor.h" |
egdaniel | 8750924 | 2014-12-17 13:37:13 -0800 | [diff] [blame] | 13 | #include "GrProcOptInfo.h" |
egdaniel | 378092f | 2014-12-03 10:40:13 -0800 | [diff] [blame] | 14 | #include "GrTypes.h" |
| 15 | #include "GrXferProcessor.h" |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 16 | #include "gl/GrGLXferProcessor.h" |
egdaniel | 378092f | 2014-12-03 10:40:13 -0800 | [diff] [blame] | 17 | #include "gl/builders/GrGLFragmentShaderBuilder.h" |
| 18 | #include "gl/builders/GrGLProgramBuilder.h" |
| 19 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 20 | /** |
| 21 | * Wraps the shader outputs and HW blend state that comprise a Porter Duff blend mode with coverage. |
| 22 | */ |
| 23 | struct BlendFormula { |
| 24 | public: |
| 25 | /** |
| 26 | * Values the shader can write to primary and secondary outputs. These must all be modulated by |
| 27 | * coverage to support mixed samples. The XP will ignore the multiplies when not using coverage. |
egdaniel | 9513143 | 2014-12-09 11:15:43 -0800 | [diff] [blame] | 28 | */ |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 29 | enum OutputType { |
| 30 | kNone_OutputType, //<! 0 |
| 31 | kCoverage_OutputType, //<! inputCoverage |
| 32 | kModulate_OutputType, //<! inputColor * inputCoverage |
| 33 | kISAModulate_OutputType, //<! (1 - inputColor.a) * inputCoverage |
| 34 | kISCModulate_OutputType, //<! (1 - inputColor) * inputCoverage |
| 35 | |
| 36 | kLast_OutputType = kISCModulate_OutputType |
| 37 | }; |
| 38 | |
| 39 | enum Properties { |
| 40 | kModifiesDst_Property = 1, |
| 41 | kUsesDstColor_Property = 1 << 1, |
| 42 | kUsesInputColor_Property = 1 << 2, |
| 43 | kCanTweakAlphaForCoverage_Property = 1 << 3, |
| 44 | |
| 45 | kLast_Property = kCanTweakAlphaForCoverage_Property |
| 46 | }; |
| 47 | |
| 48 | BlendFormula& operator =(const BlendFormula& other) { |
| 49 | fData = other.fData; |
| 50 | return *this; |
| 51 | } |
| 52 | |
| 53 | bool operator ==(const BlendFormula& other) const { |
| 54 | return fData == other.fData; |
| 55 | } |
| 56 | |
| 57 | bool hasSecondaryOutput() const { return kNone_OutputType != fSecondaryOutputType; } |
| 58 | bool modifiesDst() const { return SkToBool(fProps & kModifiesDst_Property); } |
| 59 | bool usesDstColor() const { return SkToBool(fProps & kUsesDstColor_Property); } |
| 60 | bool usesInputColor() const { return SkToBool(fProps & kUsesInputColor_Property); } |
| 61 | bool canTweakAlphaForCoverage() const { |
| 62 | return SkToBool(fProps & kCanTweakAlphaForCoverage_Property); |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * Deduce the properties of a compile-time constant BlendFormula. |
| 67 | */ |
| 68 | template<OutputType PrimaryOut, OutputType SecondaryOut, |
| 69 | GrBlendEquation BlendEquation, GrBlendCoeff SrcCoeff, GrBlendCoeff DstCoeff> |
| 70 | struct get_properties : SkTIntegralConstant<Properties, static_cast<Properties>( |
| 71 | |
| 72 | (GR_BLEND_MODIFIES_DST(BlendEquation, SrcCoeff, DstCoeff) ? |
| 73 | kModifiesDst_Property : 0) | |
| 74 | |
| 75 | (GR_BLEND_COEFFS_USE_DST_COLOR(SrcCoeff, DstCoeff) ? |
| 76 | kUsesDstColor_Property : 0) | |
| 77 | |
| 78 | ((PrimaryOut >= kModulate_OutputType && GR_BLEND_COEFFS_USE_SRC_COLOR(SrcCoeff,DstCoeff)) || |
| 79 | (SecondaryOut >= kModulate_OutputType && GR_BLEND_COEFF_REFS_SRC2(DstCoeff)) ? |
| 80 | kUsesInputColor_Property : 0) | // We assert later that SrcCoeff doesn't ref src2. |
| 81 | |
| 82 | (kModulate_OutputType == PrimaryOut && |
| 83 | kNone_OutputType == SecondaryOut && |
| 84 | GR_BLEND_CAN_TWEAK_ALPHA_FOR_COVERAGE(BlendEquation, SrcCoeff, DstCoeff) ? |
| 85 | kCanTweakAlphaForCoverage_Property : 0))> { |
| 86 | |
| 87 | // The provided formula should already be optimized. |
| 88 | GR_STATIC_ASSERT((kNone_OutputType == PrimaryOut) == |
| 89 | !GR_BLEND_COEFFS_USE_SRC_COLOR(SrcCoeff, DstCoeff)); |
| 90 | GR_STATIC_ASSERT(!GR_BLEND_COEFF_REFS_SRC2(SrcCoeff)); |
| 91 | GR_STATIC_ASSERT((kNone_OutputType == SecondaryOut) == |
| 92 | !GR_BLEND_COEFF_REFS_SRC2(DstCoeff)); |
| 93 | GR_STATIC_ASSERT(PrimaryOut != SecondaryOut || kNone_OutputType == PrimaryOut); |
| 94 | GR_STATIC_ASSERT(kNone_OutputType != PrimaryOut || kNone_OutputType == SecondaryOut); |
| 95 | }; |
| 96 | |
| 97 | union { |
| 98 | struct { |
| 99 | // We allot the enums one more bit than they require because MSVC seems to sign-extend |
| 100 | // them when the top bit is set. (This is in violation of the C++03 standard 9.6/4) |
| 101 | OutputType fPrimaryOutputType : 4; |
| 102 | OutputType fSecondaryOutputType : 4; |
| 103 | GrBlendEquation fBlendEquation : 6; |
| 104 | GrBlendCoeff fSrcCoeff : 6; |
| 105 | GrBlendCoeff fDstCoeff : 6; |
| 106 | Properties fProps : 32 - (4 + 4 + 6 + 6 + 6); |
| 107 | }; |
| 108 | uint32_t fData; |
| 109 | }; |
| 110 | |
| 111 | GR_STATIC_ASSERT(kLast_OutputType < (1 << 3)); |
| 112 | GR_STATIC_ASSERT(kLast_GrBlendEquation < (1 << 5)); |
| 113 | GR_STATIC_ASSERT(kLast_GrBlendCoeff < (1 << 5)); |
| 114 | GR_STATIC_ASSERT(kLast_Property < (1 << 6)); |
| 115 | }; |
| 116 | |
| 117 | GR_STATIC_ASSERT(4 == sizeof(BlendFormula)); |
| 118 | |
| 119 | GR_MAKE_BITFIELD_OPS(BlendFormula::Properties); |
| 120 | |
| 121 | /** |
| 122 | * Initialize a compile-time constant BlendFormula and automatically deduce fProps. |
| 123 | */ |
| 124 | #define INIT_BLEND_FORMULA(PRIMARY_OUT, SECONDARY_OUT, BLEND_EQUATION, SRC_COEFF, DST_COEFF) \ |
| 125 | {{{PRIMARY_OUT, \ |
| 126 | SECONDARY_OUT, \ |
| 127 | BLEND_EQUATION, SRC_COEFF, DST_COEFF, \ |
| 128 | BlendFormula::get_properties<PRIMARY_OUT, SECONDARY_OUT, \ |
| 129 | BLEND_EQUATION, SRC_COEFF, DST_COEFF>::value}}} |
| 130 | |
| 131 | /** |
| 132 | * When there is no coverage, or the blend mode can tweak alpha for coverage, we use the standard |
| 133 | * Porter Duff formula. |
| 134 | */ |
| 135 | #define COEFF_FORMULA(SRC_COEFF, DST_COEFF) \ |
| 136 | INIT_BLEND_FORMULA(BlendFormula::kModulate_OutputType, \ |
| 137 | BlendFormula::kNone_OutputType, \ |
| 138 | kAdd_GrBlendEquation, SRC_COEFF, DST_COEFF) |
| 139 | |
| 140 | /** |
| 141 | * When the coeffs are (Zero, Zero), we clear the dst. This formula has its own macro so we can set |
| 142 | * the primary output type to none. |
| 143 | */ |
| 144 | #define DST_CLEAR_FORMULA \ |
| 145 | INIT_BLEND_FORMULA(BlendFormula::kNone_OutputType, \ |
| 146 | BlendFormula::kNone_OutputType, \ |
| 147 | kAdd_GrBlendEquation, kZero_GrBlendCoeff, kZero_GrBlendCoeff) |
| 148 | |
| 149 | /** |
| 150 | * When the coeffs are (Zero, One), we don't write to the dst at all. This formula has its own macro |
| 151 | * so we can set the primary output type to none. |
| 152 | */ |
| 153 | #define NO_DST_WRITE_FORMULA \ |
| 154 | INIT_BLEND_FORMULA(BlendFormula::kNone_OutputType, \ |
| 155 | BlendFormula::kNone_OutputType, \ |
| 156 | kAdd_GrBlendEquation, kZero_GrBlendCoeff, kOne_GrBlendCoeff) |
| 157 | |
| 158 | /** |
| 159 | * When there is coverage, the equation with f=coverage is: |
| 160 | * |
| 161 | * D' = f * (S * srcCoeff + D * dstCoeff) + (1-f) * D |
| 162 | * |
| 163 | * This can be rewritten as: |
| 164 | * |
| 165 | * D' = f * S * srcCoeff + D * (1 - [f * (1 - dstCoeff)]) |
| 166 | * |
| 167 | * To implement this formula, we output [f * (1 - dstCoeff)] for the secondary color and replace the |
| 168 | * HW dst coeff with IS2C. |
| 169 | * |
| 170 | * Xfer modes: dst-atop (Sa!=1) |
| 171 | */ |
| 172 | #define COVERAGE_FORMULA(ONE_MINUS_DST_COEFF_MODULATE_OUTPUT, SRC_COEFF) \ |
| 173 | INIT_BLEND_FORMULA(BlendFormula::kModulate_OutputType, \ |
| 174 | ONE_MINUS_DST_COEFF_MODULATE_OUTPUT, \ |
| 175 | kAdd_GrBlendEquation, SRC_COEFF, kIS2C_GrBlendCoeff) |
| 176 | |
| 177 | /** |
| 178 | * When there is coverage and the src coeff is Zero, the equation with f=coverage becomes: |
| 179 | * |
| 180 | * D' = f * D * dstCoeff + (1-f) * D |
| 181 | * |
| 182 | * This can be rewritten as: |
| 183 | * |
| 184 | * D' = D - D * [f * (1 - dstCoeff)] |
| 185 | * |
| 186 | * To implement this formula, we output [f * (1 - dstCoeff)] for the primary color and use a reverse |
| 187 | * subtract HW blend equation with coeffs of (DC, One). |
| 188 | * |
| 189 | * Xfer modes: clear, dst-out (Sa=1), dst-in (Sa!=1), modulate (Sc!=1) |
| 190 | */ |
| 191 | #define COVERAGE_SRC_COEFF_ZERO_FORMULA(ONE_MINUS_DST_COEFF_MODULATE_OUTPUT) \ |
| 192 | INIT_BLEND_FORMULA(ONE_MINUS_DST_COEFF_MODULATE_OUTPUT, \ |
| 193 | BlendFormula::kNone_OutputType, \ |
| 194 | kReverseSubtract_GrBlendEquation, kDC_GrBlendCoeff, kOne_GrBlendCoeff) |
| 195 | |
| 196 | /** |
| 197 | * When there is coverage and the dst coeff is Zero, the equation with f=coverage becomes: |
| 198 | * |
| 199 | * D' = f * S * srcCoeff + (1-f) * D |
| 200 | * |
| 201 | * To implement this formula, we output [f] for the secondary color and replace the HW dst coeff |
| 202 | * with IS2A. (Note that we can avoid dual source blending when Sa=1 by using ISA.) |
| 203 | * |
| 204 | * Xfer modes (Sa!=1): src, src-in, src-out |
| 205 | */ |
| 206 | #define COVERAGE_DST_COEFF_ZERO_FORMULA(SRC_COEFF) \ |
| 207 | INIT_BLEND_FORMULA(BlendFormula::kModulate_OutputType, \ |
| 208 | BlendFormula::kCoverage_OutputType, \ |
| 209 | kAdd_GrBlendEquation, SRC_COEFF, kIS2A_GrBlendCoeff) |
| 210 | |
| 211 | /** |
| 212 | * This table outlines the blend formulas we will use with each xfermode, with and without coverage, |
| 213 | * with and without an opaque input color. Optimization properties are deduced at compile time so we |
| 214 | * can make runtime decisions quickly. RGB coverage is not supported. |
| 215 | */ |
| 216 | static const BlendFormula gBlendTable[2][2][SkXfermode::kLastCoeffMode + 1] = { |
| 217 | |
| 218 | /*>> No coverage, input color unknown <<*/ {{ |
| 219 | |
| 220 | /* clear */ DST_CLEAR_FORMULA, |
| 221 | /* src */ COEFF_FORMULA( kOne_GrBlendCoeff, kZero_GrBlendCoeff), |
| 222 | /* dst */ NO_DST_WRITE_FORMULA, |
| 223 | /* src-over */ COEFF_FORMULA( kOne_GrBlendCoeff, kISA_GrBlendCoeff), |
| 224 | /* dst-over */ COEFF_FORMULA( kIDA_GrBlendCoeff, kOne_GrBlendCoeff), |
| 225 | /* src-in */ COEFF_FORMULA( kDA_GrBlendCoeff, kZero_GrBlendCoeff), |
| 226 | /* dst-in */ COEFF_FORMULA( kZero_GrBlendCoeff, kSA_GrBlendCoeff), |
| 227 | /* src-out */ COEFF_FORMULA( kIDA_GrBlendCoeff, kZero_GrBlendCoeff), |
| 228 | /* dst-out */ COEFF_FORMULA( kZero_GrBlendCoeff, kISA_GrBlendCoeff), |
| 229 | /* src-atop */ COEFF_FORMULA( kDA_GrBlendCoeff, kISA_GrBlendCoeff), |
| 230 | /* dst-atop */ COEFF_FORMULA( kIDA_GrBlendCoeff, kSA_GrBlendCoeff), |
| 231 | /* xor */ COEFF_FORMULA( kIDA_GrBlendCoeff, kISA_GrBlendCoeff), |
| 232 | /* plus */ COEFF_FORMULA( kOne_GrBlendCoeff, kOne_GrBlendCoeff), |
| 233 | /* modulate */ COEFF_FORMULA( kZero_GrBlendCoeff, kSC_GrBlendCoeff), |
| 234 | /* screen */ COEFF_FORMULA( kOne_GrBlendCoeff, kISC_GrBlendCoeff), |
| 235 | |
| 236 | }, /*>> Has coverage, input color unknown <<*/ { |
| 237 | |
| 238 | /* clear */ COVERAGE_SRC_COEFF_ZERO_FORMULA(BlendFormula::kCoverage_OutputType), |
| 239 | /* src */ COVERAGE_DST_COEFF_ZERO_FORMULA(kOne_GrBlendCoeff), |
| 240 | /* dst */ NO_DST_WRITE_FORMULA, |
| 241 | /* src-over */ COEFF_FORMULA( kOne_GrBlendCoeff, kISA_GrBlendCoeff), |
| 242 | /* dst-over */ COEFF_FORMULA( kIDA_GrBlendCoeff, kOne_GrBlendCoeff), |
| 243 | /* src-in */ COVERAGE_DST_COEFF_ZERO_FORMULA(kDA_GrBlendCoeff), |
| 244 | /* dst-in */ COVERAGE_SRC_COEFF_ZERO_FORMULA(BlendFormula::kISAModulate_OutputType), |
| 245 | /* src-out */ COVERAGE_DST_COEFF_ZERO_FORMULA(kIDA_GrBlendCoeff), |
| 246 | /* dst-out */ COEFF_FORMULA( kZero_GrBlendCoeff, kISA_GrBlendCoeff), |
| 247 | /* src-atop */ COEFF_FORMULA( kDA_GrBlendCoeff, kISA_GrBlendCoeff), |
| 248 | /* dst-atop */ COVERAGE_FORMULA(BlendFormula::kISAModulate_OutputType, kIDA_GrBlendCoeff), |
| 249 | /* xor */ COEFF_FORMULA( kIDA_GrBlendCoeff, kISA_GrBlendCoeff), |
| 250 | /* plus */ COEFF_FORMULA( kOne_GrBlendCoeff, kOne_GrBlendCoeff), |
| 251 | /* modulate */ COVERAGE_SRC_COEFF_ZERO_FORMULA(BlendFormula::kISCModulate_OutputType), |
| 252 | /* screen */ COEFF_FORMULA( kOne_GrBlendCoeff, kISC_GrBlendCoeff), |
| 253 | |
| 254 | }}, /*>> No coverage, input color opaque <<*/ {{ |
| 255 | |
| 256 | /* clear */ DST_CLEAR_FORMULA, |
| 257 | /* src */ COEFF_FORMULA( kOne_GrBlendCoeff, kZero_GrBlendCoeff), |
| 258 | /* dst */ NO_DST_WRITE_FORMULA, |
| 259 | /* src-over */ COEFF_FORMULA( kOne_GrBlendCoeff, kZero_GrBlendCoeff), |
| 260 | /* dst-over */ COEFF_FORMULA( kIDA_GrBlendCoeff, kOne_GrBlendCoeff), |
| 261 | /* src-in */ COEFF_FORMULA( kDA_GrBlendCoeff, kZero_GrBlendCoeff), |
| 262 | /* dst-in */ NO_DST_WRITE_FORMULA, |
| 263 | /* src-out */ COEFF_FORMULA( kIDA_GrBlendCoeff, kZero_GrBlendCoeff), |
| 264 | /* dst-out */ DST_CLEAR_FORMULA, |
| 265 | /* src-atop */ COEFF_FORMULA( kDA_GrBlendCoeff, kZero_GrBlendCoeff), |
| 266 | /* dst-atop */ COEFF_FORMULA( kIDA_GrBlendCoeff, kOne_GrBlendCoeff), |
| 267 | /* xor */ COEFF_FORMULA( kIDA_GrBlendCoeff, kZero_GrBlendCoeff), |
| 268 | /* plus */ COEFF_FORMULA( kOne_GrBlendCoeff, kOne_GrBlendCoeff), |
| 269 | /* modulate */ COEFF_FORMULA( kZero_GrBlendCoeff, kSC_GrBlendCoeff), |
| 270 | /* screen */ COEFF_FORMULA( kOne_GrBlendCoeff, kISC_GrBlendCoeff), |
| 271 | |
| 272 | }, /*>> Has coverage, input color opaque <<*/ { |
| 273 | |
| 274 | /* clear */ COVERAGE_SRC_COEFF_ZERO_FORMULA(BlendFormula::kCoverage_OutputType), |
| 275 | /* src */ COEFF_FORMULA( kOne_GrBlendCoeff, kISA_GrBlendCoeff), |
| 276 | /* dst */ NO_DST_WRITE_FORMULA, |
| 277 | /* src-over */ COEFF_FORMULA( kOne_GrBlendCoeff, kISA_GrBlendCoeff), |
| 278 | /* dst-over */ COEFF_FORMULA( kIDA_GrBlendCoeff, kOne_GrBlendCoeff), |
| 279 | /* src-in */ COEFF_FORMULA( kDA_GrBlendCoeff, kISA_GrBlendCoeff), |
| 280 | /* dst-in */ NO_DST_WRITE_FORMULA, |
| 281 | /* src-out */ COEFF_FORMULA( kIDA_GrBlendCoeff, kISA_GrBlendCoeff), |
| 282 | /* dst-out */ COVERAGE_SRC_COEFF_ZERO_FORMULA(BlendFormula::kCoverage_OutputType), |
| 283 | /* src-atop */ COEFF_FORMULA( kDA_GrBlendCoeff, kISA_GrBlendCoeff), |
| 284 | /* dst-atop */ COEFF_FORMULA( kIDA_GrBlendCoeff, kOne_GrBlendCoeff), |
| 285 | /* xor */ COEFF_FORMULA( kIDA_GrBlendCoeff, kISA_GrBlendCoeff), |
| 286 | /* plus */ COEFF_FORMULA( kOne_GrBlendCoeff, kOne_GrBlendCoeff), |
| 287 | /* modulate */ COVERAGE_SRC_COEFF_ZERO_FORMULA(BlendFormula::kISCModulate_OutputType), |
| 288 | /* screen */ COEFF_FORMULA( kOne_GrBlendCoeff, kISC_GrBlendCoeff), |
| 289 | }}}; |
| 290 | |
| 291 | static BlendFormula get_blend_formula(SkXfermode::Mode xfermode, |
| 292 | const GrProcOptInfo& colorPOI, |
| 293 | const GrProcOptInfo& coveragePOI) { |
| 294 | SkASSERT(xfermode >= 0 && xfermode <= SkXfermode::kLastCoeffMode); |
| 295 | SkASSERT(!coveragePOI.isFourChannelOutput()); |
| 296 | |
| 297 | return gBlendTable[colorPOI.isOpaque()][!coveragePOI.isSolidWhite()][xfermode]; |
egdaniel | 9513143 | 2014-12-09 11:15:43 -0800 | [diff] [blame] | 298 | } |
| 299 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 300 | /////////////////////////////////////////////////////////////////////////////// |
| 301 | |
egdaniel | 41d4f09 | 2015-02-09 07:51:00 -0800 | [diff] [blame] | 302 | class PorterDuffXferProcessor : public GrXferProcessor { |
egdaniel | 378092f | 2014-12-03 10:40:13 -0800 | [diff] [blame] | 303 | public: |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 304 | static GrXferProcessor* Create(BlendFormula blendFormula) { |
| 305 | return SkNEW_ARGS(PorterDuffXferProcessor, (blendFormula)); |
egdaniel | 41d4f09 | 2015-02-09 07:51:00 -0800 | [diff] [blame] | 306 | } |
egdaniel | 378092f | 2014-12-03 10:40:13 -0800 | [diff] [blame] | 307 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 308 | const char* name() const override { return "Porter Duff"; } |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 309 | bool hasSecondaryOutput() const override { return fBlendFormula.hasSecondaryOutput(); } |
egdaniel | 41d4f09 | 2015-02-09 07:51:00 -0800 | [diff] [blame] | 310 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 311 | GrGLXferProcessor* createGLInstance() const override; |
egdaniel | 41d4f09 | 2015-02-09 07:51:00 -0800 | [diff] [blame] | 312 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 313 | BlendFormula getBlendFormula() const { return fBlendFormula; } |
cdalton | f4f2b44 | 2015-04-23 09:40:23 -0700 | [diff] [blame] | 314 | |
| 315 | private: |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 316 | PorterDuffXferProcessor(BlendFormula blendFormula) : fBlendFormula(blendFormula) { |
| 317 | this->initClassID<PorterDuffXferProcessor>(); |
| 318 | } |
cdalton | f4f2b44 | 2015-04-23 09:40:23 -0700 | [diff] [blame] | 319 | |
egdaniel | c19cdc2 | 2015-05-10 08:45:18 -0700 | [diff] [blame] | 320 | GrXferProcessor::OptFlags onGetOptimizations(const GrProcOptInfo& colorPOI, |
| 321 | const GrProcOptInfo& coveragePOI, |
| 322 | bool doesStencilWrite, |
| 323 | GrColor* overrideColor, |
bsalomon | 4b91f76 | 2015-05-19 09:29:46 -0700 | [diff] [blame] | 324 | const GrCaps& caps) override; |
egdaniel | c19cdc2 | 2015-05-10 08:45:18 -0700 | [diff] [blame] | 325 | |
jvanverth | cfc1886 | 2015-04-28 08:48:20 -0700 | [diff] [blame] | 326 | void onGetGLProcessorKey(const GrGLSLCaps& caps, GrProcessorKeyBuilder* b) const override; |
cdalton | f4f2b44 | 2015-04-23 09:40:23 -0700 | [diff] [blame] | 327 | |
| 328 | void onGetBlendInfo(GrXferProcessor::BlendInfo* blendInfo) const override { |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 329 | blendInfo->fEquation = fBlendFormula.fBlendEquation; |
| 330 | blendInfo->fSrcBlend = fBlendFormula.fSrcCoeff; |
| 331 | blendInfo->fDstBlend = fBlendFormula.fDstCoeff; |
| 332 | blendInfo->fWriteColor = fBlendFormula.modifiesDst(); |
egdaniel | 41d4f09 | 2015-02-09 07:51:00 -0800 | [diff] [blame] | 333 | } |
| 334 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 335 | bool onIsEqual(const GrXferProcessor& xpBase) const override { |
egdaniel | 41d4f09 | 2015-02-09 07:51:00 -0800 | [diff] [blame] | 336 | const PorterDuffXferProcessor& xp = xpBase.cast<PorterDuffXferProcessor>(); |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 337 | return fBlendFormula == xp.fBlendFormula; |
egdaniel | 41d4f09 | 2015-02-09 07:51:00 -0800 | [diff] [blame] | 338 | } |
| 339 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 340 | const BlendFormula fBlendFormula; |
egdaniel | 41d4f09 | 2015-02-09 07:51:00 -0800 | [diff] [blame] | 341 | |
| 342 | typedef GrXferProcessor INHERITED; |
| 343 | }; |
| 344 | |
| 345 | /////////////////////////////////////////////////////////////////////////////// |
| 346 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 347 | static void append_color_output(const PorterDuffXferProcessor& xp, GrGLXPFragmentBuilder* fsBuilder, |
| 348 | BlendFormula::OutputType outputType, const char* output, |
| 349 | const char* inColor, const char* inCoverage) { |
| 350 | switch (outputType) { |
| 351 | case BlendFormula::kNone_OutputType: |
| 352 | fsBuilder->codeAppendf("%s = vec4(0.0);", output); |
| 353 | break; |
| 354 | case BlendFormula::kCoverage_OutputType: |
| 355 | fsBuilder->codeAppendf("%s = %s;", |
| 356 | output, xp.readsCoverage() ? inCoverage : "vec4(1.0)"); |
| 357 | break; |
| 358 | case BlendFormula::kModulate_OutputType: |
| 359 | if (xp.readsCoverage()) { |
| 360 | fsBuilder->codeAppendf("%s = %s * %s;", output, inColor, inCoverage); |
| 361 | } else { |
| 362 | fsBuilder->codeAppendf("%s = %s;", output, inColor); |
| 363 | } |
| 364 | break; |
| 365 | case BlendFormula::kISAModulate_OutputType: |
| 366 | if (xp.readsCoverage()) { |
| 367 | fsBuilder->codeAppendf("%s = (1.0 - %s.a) * %s;", output, inColor, inCoverage); |
| 368 | } else { |
| 369 | fsBuilder->codeAppendf("%s = vec4(1.0 - %s.a);", output, inColor); |
| 370 | } |
| 371 | break; |
| 372 | case BlendFormula::kISCModulate_OutputType: |
| 373 | if (xp.readsCoverage()) { |
| 374 | fsBuilder->codeAppendf("%s = (vec4(1.0) - %s) * %s;", output, inColor, inCoverage); |
| 375 | } else { |
| 376 | fsBuilder->codeAppendf("%s = vec4(1.0) - %s;", output, inColor); |
| 377 | } |
| 378 | break; |
| 379 | default: |
| 380 | SkFAIL("Unsupported output type."); |
| 381 | break; |
egdaniel | 3ad6570 | 2015-02-17 11:15:47 -0800 | [diff] [blame] | 382 | } |
| 383 | } |
| 384 | |
egdaniel | 41d4f09 | 2015-02-09 07:51:00 -0800 | [diff] [blame] | 385 | class GLPorterDuffXferProcessor : public GrGLXferProcessor { |
| 386 | public: |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 387 | static void GenKey(const GrProcessor& processor, GrProcessorKeyBuilder* b) { |
egdaniel | 41d4f09 | 2015-02-09 07:51:00 -0800 | [diff] [blame] | 388 | const PorterDuffXferProcessor& xp = processor.cast<PorterDuffXferProcessor>(); |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 389 | b->add32(SkToInt(xp.readsCoverage()) | |
| 390 | (xp.getBlendFormula().fPrimaryOutputType << 1) | |
| 391 | (xp.getBlendFormula().fSecondaryOutputType << 4)); |
| 392 | GR_STATIC_ASSERT(BlendFormula::kLast_OutputType < 8); |
bsalomon | 50785a3 | 2015-02-06 07:02:37 -0800 | [diff] [blame] | 393 | }; |
| 394 | |
| 395 | private: |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 396 | void onEmitCode(const EmitArgs& args) override { |
egdaniel | 41d4f09 | 2015-02-09 07:51:00 -0800 | [diff] [blame] | 397 | const PorterDuffXferProcessor& xp = args.fXP.cast<PorterDuffXferProcessor>(); |
egdaniel | 29bee0f | 2015-04-29 11:54:42 -0700 | [diff] [blame] | 398 | GrGLXPFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder(); |
bungeman | c33db93 | 2015-05-22 17:55:26 -0700 | [diff] [blame] | 399 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 400 | BlendFormula blendFormula = xp.getBlendFormula(); |
| 401 | if (blendFormula.hasSecondaryOutput()) { |
| 402 | append_color_output(xp, fsBuilder, blendFormula.fSecondaryOutputType, |
| 403 | args.fOutputSecondary, args.fInputColor, args.fInputCoverage); |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 404 | } |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 405 | append_color_output(xp, fsBuilder, blendFormula.fPrimaryOutputType, |
| 406 | args.fOutputPrimary, args.fInputColor, args.fInputCoverage); |
egdaniel | 378092f | 2014-12-03 10:40:13 -0800 | [diff] [blame] | 407 | } |
| 408 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 409 | void onSetData(const GrGLProgramDataManager&, const GrXferProcessor&) override {} |
egdaniel | 378092f | 2014-12-03 10:40:13 -0800 | [diff] [blame] | 410 | |
egdaniel | 378092f | 2014-12-03 10:40:13 -0800 | [diff] [blame] | 411 | typedef GrGLXferProcessor INHERITED; |
| 412 | }; |
| 413 | |
| 414 | /////////////////////////////////////////////////////////////////////////////// |
| 415 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 416 | void PorterDuffXferProcessor::onGetGLProcessorKey(const GrGLSLCaps&, |
egdaniel | 41d4f09 | 2015-02-09 07:51:00 -0800 | [diff] [blame] | 417 | GrProcessorKeyBuilder* b) const { |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 418 | GLPorterDuffXferProcessor::GenKey(*this, b); |
joshualitt | eb2a676 | 2014-12-04 11:35:33 -0800 | [diff] [blame] | 419 | } |
| 420 | |
egdaniel | 41d4f09 | 2015-02-09 07:51:00 -0800 | [diff] [blame] | 421 | GrGLXferProcessor* PorterDuffXferProcessor::createGLInstance() const { |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 422 | return SkNEW(GLPorterDuffXferProcessor); |
egdaniel | 378092f | 2014-12-03 10:40:13 -0800 | [diff] [blame] | 423 | } |
| 424 | |
egdaniel | 9513143 | 2014-12-09 11:15:43 -0800 | [diff] [blame] | 425 | GrXferProcessor::OptFlags |
egdaniel | c19cdc2 | 2015-05-10 08:45:18 -0700 | [diff] [blame] | 426 | PorterDuffXferProcessor::onGetOptimizations(const GrProcOptInfo& colorPOI, |
| 427 | const GrProcOptInfo& coveragePOI, |
| 428 | bool doesStencilWrite, |
| 429 | GrColor* overrideColor, |
bsalomon | 4b91f76 | 2015-05-19 09:29:46 -0700 | [diff] [blame] | 430 | const GrCaps& caps) { |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 431 | GrXferProcessor::OptFlags optFlags = GrXferProcessor::kNone_Opt; |
| 432 | if (!fBlendFormula.modifiesDst()) { |
| 433 | if (!doesStencilWrite) { |
| 434 | optFlags |= GrXferProcessor::kSkipDraw_OptFlag; |
| 435 | } |
| 436 | optFlags |= (GrXferProcessor::kIgnoreColor_OptFlag | |
| 437 | GrXferProcessor::kIgnoreCoverage_OptFlag | |
| 438 | GrXferProcessor::kCanTweakAlphaForCoverage_OptFlag); |
| 439 | } else { |
| 440 | if (!fBlendFormula.usesInputColor()) { |
| 441 | optFlags |= GrXferProcessor::kIgnoreColor_OptFlag; |
| 442 | } |
| 443 | if (coveragePOI.isSolidWhite()) { |
| 444 | optFlags |= GrXferProcessor::kIgnoreCoverage_OptFlag; |
| 445 | } |
| 446 | if (colorPOI.allStagesMultiplyInput() && fBlendFormula.canTweakAlphaForCoverage()) { |
| 447 | optFlags |= GrXferProcessor::kCanTweakAlphaForCoverage_OptFlag; |
| 448 | } |
| 449 | } |
bungeman | c33db93 | 2015-05-22 17:55:26 -0700 | [diff] [blame] | 450 | return optFlags; |
| 451 | } |
| 452 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 453 | /////////////////////////////////////////////////////////////////////////////// |
| 454 | |
| 455 | class ShaderPDXferProcessor : public GrXferProcessor { |
| 456 | public: |
| 457 | static GrXferProcessor* Create(SkXfermode::Mode xfermode, const DstTexture* dstTexture) { |
| 458 | return SkNEW_ARGS(ShaderPDXferProcessor, (xfermode, dstTexture)); |
bungeman | c33db93 | 2015-05-22 17:55:26 -0700 | [diff] [blame] | 459 | } |
| 460 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 461 | const char* name() const override { return "Porter Duff Shader"; } |
| 462 | bool hasSecondaryOutput() const override { return false; } |
| 463 | |
| 464 | GrGLXferProcessor* createGLInstance() const override; |
| 465 | |
| 466 | SkXfermode::Mode getXfermode() const { return fXfermode; } |
| 467 | |
| 468 | private: |
| 469 | ShaderPDXferProcessor(SkXfermode::Mode xfermode, const DstTexture* dstTexture) |
| 470 | : INHERITED(dstTexture, true) |
| 471 | , fXfermode(xfermode) { |
| 472 | this->initClassID<ShaderPDXferProcessor>(); |
bungeman | c33db93 | 2015-05-22 17:55:26 -0700 | [diff] [blame] | 473 | } |
| 474 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 475 | GrXferProcessor::OptFlags onGetOptimizations(const GrProcOptInfo&, const GrProcOptInfo&, |
| 476 | bool, GrColor*, const GrCaps&) override { |
| 477 | return kNone_Opt; |
| 478 | } |
| 479 | |
| 480 | void onGetGLProcessorKey(const GrGLSLCaps& caps, GrProcessorKeyBuilder* b) const override; |
| 481 | |
| 482 | bool onIsEqual(const GrXferProcessor& xpBase) const override { |
| 483 | const ShaderPDXferProcessor& xp = xpBase.cast<ShaderPDXferProcessor>(); |
| 484 | return fXfermode == xp.fXfermode; |
| 485 | } |
| 486 | |
| 487 | const SkXfermode::Mode fXfermode; |
| 488 | |
| 489 | typedef GrXferProcessor INHERITED; |
| 490 | }; |
| 491 | |
| 492 | /////////////////////////////////////////////////////////////////////////////// |
| 493 | |
| 494 | static bool append_porterduff_term(GrGLXPFragmentBuilder* fsBuilder, SkXfermode::Coeff coeff, |
| 495 | const char* colorName, const char* srcColorName, |
| 496 | const char* dstColorName, bool hasPrevious) { |
| 497 | if (SkXfermode::kZero_Coeff == coeff) { |
| 498 | return hasPrevious; |
| 499 | } else { |
| 500 | if (hasPrevious) { |
| 501 | fsBuilder->codeAppend(" + "); |
bungeman | c33db93 | 2015-05-22 17:55:26 -0700 | [diff] [blame] | 502 | } |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 503 | fsBuilder->codeAppendf("%s", colorName); |
| 504 | switch (coeff) { |
| 505 | case SkXfermode::kOne_Coeff: |
| 506 | break; |
| 507 | case SkXfermode::kSC_Coeff: |
| 508 | fsBuilder->codeAppendf(" * %s", srcColorName); |
| 509 | break; |
| 510 | case SkXfermode::kISC_Coeff: |
| 511 | fsBuilder->codeAppendf(" * (vec4(1.0) - %s)", srcColorName); |
| 512 | break; |
| 513 | case SkXfermode::kDC_Coeff: |
| 514 | fsBuilder->codeAppendf(" * %s", dstColorName); |
| 515 | break; |
| 516 | case SkXfermode::kIDC_Coeff: |
| 517 | fsBuilder->codeAppendf(" * (vec4(1.0) - %s)", dstColorName); |
| 518 | break; |
| 519 | case SkXfermode::kSA_Coeff: |
| 520 | fsBuilder->codeAppendf(" * %s.a", srcColorName); |
| 521 | break; |
| 522 | case SkXfermode::kISA_Coeff: |
| 523 | fsBuilder->codeAppendf(" * (1.0 - %s.a)", srcColorName); |
| 524 | break; |
| 525 | case SkXfermode::kDA_Coeff: |
| 526 | fsBuilder->codeAppendf(" * %s.a", dstColorName); |
| 527 | break; |
| 528 | case SkXfermode::kIDA_Coeff: |
| 529 | fsBuilder->codeAppendf(" * (1.0 - %s.a)", dstColorName); |
| 530 | break; |
| 531 | default: |
| 532 | SkFAIL("Unsupported Blend Coeff"); |
| 533 | } |
| 534 | return true; |
bungeman | c33db93 | 2015-05-22 17:55:26 -0700 | [diff] [blame] | 535 | } |
| 536 | } |
| 537 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 538 | class GLShaderPDXferProcessor : public GrGLXferProcessor { |
| 539 | public: |
| 540 | static void GenKey(const GrProcessor& processor, GrProcessorKeyBuilder* b) { |
| 541 | const ShaderPDXferProcessor& xp = processor.cast<ShaderPDXferProcessor>(); |
| 542 | b->add32(xp.getXfermode()); |
egdaniel | 3ad6570 | 2015-02-17 11:15:47 -0800 | [diff] [blame] | 543 | } |
egdaniel | 8750924 | 2014-12-17 13:37:13 -0800 | [diff] [blame] | 544 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 545 | private: |
| 546 | void onEmitCode(const EmitArgs& args) override { |
| 547 | const ShaderPDXferProcessor& xp = args.fXP.cast<ShaderPDXferProcessor>(); |
| 548 | GrGLXPFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder(); |
egdaniel | 9513143 | 2014-12-09 11:15:43 -0800 | [diff] [blame] | 549 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 550 | SkXfermode::Coeff srcCoeff, dstCoeff; |
| 551 | SkXfermode::ModeAsCoeff(xp.getXfermode(), &srcCoeff, &dstCoeff); |
bungeman | c33db93 | 2015-05-22 17:55:26 -0700 | [diff] [blame] | 552 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 553 | const char* dstColor = fsBuilder->dstColor(); |
| 554 | |
| 555 | fsBuilder->codeAppend("vec4 colorBlend ="); |
| 556 | // append src blend |
| 557 | bool didAppend = append_porterduff_term(fsBuilder, srcCoeff, |
| 558 | args.fInputColor, args.fInputColor, |
| 559 | dstColor, false); |
| 560 | // append dst blend |
| 561 | SkAssertResult(append_porterduff_term(fsBuilder, dstCoeff, |
| 562 | dstColor, args.fInputColor, |
| 563 | dstColor, didAppend)); |
| 564 | fsBuilder->codeAppend(";"); |
| 565 | |
| 566 | fsBuilder->codeAppendf("%s = %s * colorBlend + (vec4(1.0) - %s) * %s;", |
| 567 | args.fOutputPrimary, args.fInputCoverage, args.fInputCoverage, |
| 568 | dstColor); |
egdaniel | 9513143 | 2014-12-09 11:15:43 -0800 | [diff] [blame] | 569 | } |
| 570 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 571 | void onSetData(const GrGLProgramDataManager&, const GrXferProcessor&) override {} |
bungeman | c33db93 | 2015-05-22 17:55:26 -0700 | [diff] [blame] | 572 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 573 | typedef GrGLXferProcessor INHERITED; |
| 574 | }; |
bungeman | c33db93 | 2015-05-22 17:55:26 -0700 | [diff] [blame] | 575 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 576 | /////////////////////////////////////////////////////////////////////////////// |
bungeman | c33db93 | 2015-05-22 17:55:26 -0700 | [diff] [blame] | 577 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 578 | void ShaderPDXferProcessor::onGetGLProcessorKey(const GrGLSLCaps&, |
| 579 | GrProcessorKeyBuilder* b) const { |
| 580 | GLShaderPDXferProcessor::GenKey(*this, b); |
bungeman | c33db93 | 2015-05-22 17:55:26 -0700 | [diff] [blame] | 581 | } |
| 582 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 583 | GrGLXferProcessor* ShaderPDXferProcessor::createGLInstance() const { |
| 584 | return SkNEW(GLShaderPDXferProcessor); |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 585 | } |
| 586 | |
egdaniel | 378092f | 2014-12-03 10:40:13 -0800 | [diff] [blame] | 587 | /////////////////////////////////////////////////////////////////////////////// |
| 588 | |
egdaniel | 0d5fd11 | 2015-05-12 06:11:35 -0700 | [diff] [blame] | 589 | class PDLCDXferProcessor : public GrXferProcessor { |
| 590 | public: |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 591 | static GrXferProcessor* Create(SkXfermode::Mode xfermode, const GrProcOptInfo& colorPOI); |
egdaniel | 0d5fd11 | 2015-05-12 06:11:35 -0700 | [diff] [blame] | 592 | |
| 593 | ~PDLCDXferProcessor() override; |
| 594 | |
| 595 | const char* name() const override { return "Porter Duff LCD"; } |
| 596 | |
| 597 | GrGLXferProcessor* createGLInstance() const override; |
| 598 | |
| 599 | bool hasSecondaryOutput() const override { return false; } |
| 600 | |
| 601 | private: |
| 602 | PDLCDXferProcessor(GrColor blendConstant, uint8_t alpha); |
| 603 | |
| 604 | GrXferProcessor::OptFlags onGetOptimizations(const GrProcOptInfo& colorPOI, |
| 605 | const GrProcOptInfo& coveragePOI, |
| 606 | bool doesStencilWrite, |
| 607 | GrColor* overrideColor, |
bsalomon | 4b91f76 | 2015-05-19 09:29:46 -0700 | [diff] [blame] | 608 | const GrCaps& caps) override; |
egdaniel | 0d5fd11 | 2015-05-12 06:11:35 -0700 | [diff] [blame] | 609 | |
| 610 | void onGetGLProcessorKey(const GrGLSLCaps& caps, GrProcessorKeyBuilder* b) const override; |
| 611 | |
| 612 | void onGetBlendInfo(GrXferProcessor::BlendInfo* blendInfo) const override { |
| 613 | blendInfo->fSrcBlend = kConstC_GrBlendCoeff; |
| 614 | blendInfo->fDstBlend = kISC_GrBlendCoeff; |
| 615 | blendInfo->fBlendConstant = fBlendConstant; |
| 616 | } |
| 617 | |
| 618 | bool onIsEqual(const GrXferProcessor& xpBase) const override { |
| 619 | const PDLCDXferProcessor& xp = xpBase.cast<PDLCDXferProcessor>(); |
| 620 | if (fBlendConstant != xp.fBlendConstant || |
| 621 | fAlpha != xp.fAlpha) { |
| 622 | return false; |
| 623 | } |
| 624 | return true; |
| 625 | } |
| 626 | |
| 627 | GrColor fBlendConstant; |
| 628 | uint8_t fAlpha; |
| 629 | |
| 630 | typedef GrXferProcessor INHERITED; |
| 631 | }; |
| 632 | |
| 633 | /////////////////////////////////////////////////////////////////////////////// |
| 634 | |
| 635 | class GLPDLCDXferProcessor : public GrGLXferProcessor { |
| 636 | public: |
| 637 | GLPDLCDXferProcessor(const GrProcessor&) {} |
| 638 | |
| 639 | virtual ~GLPDLCDXferProcessor() {} |
| 640 | |
| 641 | static void GenKey(const GrProcessor& processor, const GrGLSLCaps& caps, |
| 642 | GrProcessorKeyBuilder* b) {} |
| 643 | |
| 644 | private: |
| 645 | void onEmitCode(const EmitArgs& args) override { |
| 646 | GrGLXPFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder(); |
| 647 | |
| 648 | fsBuilder->codeAppendf("%s = %s * %s;", args.fOutputPrimary, args.fInputColor, |
| 649 | args.fInputCoverage); |
| 650 | } |
| 651 | |
| 652 | void onSetData(const GrGLProgramDataManager&, const GrXferProcessor&) override {}; |
| 653 | |
| 654 | typedef GrGLXferProcessor INHERITED; |
| 655 | }; |
| 656 | |
| 657 | /////////////////////////////////////////////////////////////////////////////// |
| 658 | |
| 659 | PDLCDXferProcessor::PDLCDXferProcessor(GrColor blendConstant, uint8_t alpha) |
| 660 | : fBlendConstant(blendConstant) |
| 661 | , fAlpha(alpha) { |
| 662 | this->initClassID<PDLCDXferProcessor>(); |
| 663 | } |
| 664 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 665 | GrXferProcessor* PDLCDXferProcessor::Create(SkXfermode::Mode xfermode, |
egdaniel | 0d5fd11 | 2015-05-12 06:11:35 -0700 | [diff] [blame] | 666 | const GrProcOptInfo& colorPOI) { |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 667 | if (SkXfermode::kSrcOver_Mode != xfermode) { |
egdaniel | 0d5fd11 | 2015-05-12 06:11:35 -0700 | [diff] [blame] | 668 | return NULL; |
| 669 | } |
| 670 | |
| 671 | if (kRGBA_GrColorComponentFlags != colorPOI.validFlags()) { |
| 672 | return NULL; |
| 673 | } |
| 674 | |
| 675 | GrColor blendConstant = GrUnPreMulColor(colorPOI.color()); |
| 676 | uint8_t alpha = GrColorUnpackA(blendConstant); |
| 677 | blendConstant |= (0xff << GrColor_SHIFT_A); |
| 678 | |
| 679 | return SkNEW_ARGS(PDLCDXferProcessor, (blendConstant, alpha)); |
| 680 | } |
| 681 | |
| 682 | PDLCDXferProcessor::~PDLCDXferProcessor() { |
| 683 | } |
| 684 | |
| 685 | void PDLCDXferProcessor::onGetGLProcessorKey(const GrGLSLCaps& caps, |
| 686 | GrProcessorKeyBuilder* b) const { |
egdaniel | cc25297 | 2015-05-12 12:03:28 -0700 | [diff] [blame] | 687 | GLPDLCDXferProcessor::GenKey(*this, caps, b); |
egdaniel | 0d5fd11 | 2015-05-12 06:11:35 -0700 | [diff] [blame] | 688 | } |
| 689 | |
| 690 | GrGLXferProcessor* PDLCDXferProcessor::createGLInstance() const { |
| 691 | return SkNEW_ARGS(GLPDLCDXferProcessor, (*this)); |
| 692 | } |
| 693 | |
| 694 | GrXferProcessor::OptFlags |
| 695 | PDLCDXferProcessor::onGetOptimizations(const GrProcOptInfo& colorPOI, |
| 696 | const GrProcOptInfo& coveragePOI, |
| 697 | bool doesStencilWrite, |
| 698 | GrColor* overrideColor, |
bsalomon | 4b91f76 | 2015-05-19 09:29:46 -0700 | [diff] [blame] | 699 | const GrCaps& caps) { |
egdaniel | 0d5fd11 | 2015-05-12 06:11:35 -0700 | [diff] [blame] | 700 | // We want to force our primary output to be alpha * Coverage, where alpha is the alpha |
| 701 | // value of the blend the constant. We should already have valid blend coeff's if we are at |
| 702 | // a point where we have RGB coverage. We don't need any color stages since the known color |
| 703 | // output is already baked into the blendConstant. |
| 704 | *overrideColor = GrColorPackRGBA(fAlpha, fAlpha, fAlpha, fAlpha); |
| 705 | return GrXferProcessor::kOverrideColor_OptFlag; |
| 706 | } |
| 707 | |
| 708 | /////////////////////////////////////////////////////////////////////////////// |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 709 | |
| 710 | GrPorterDuffXPFactory::GrPorterDuffXPFactory(SkXfermode::Mode xfermode) |
| 711 | : fXfermode(xfermode) { |
egdaniel | 915187b | 2014-12-05 12:58:28 -0800 | [diff] [blame] | 712 | this->initClassID<GrPorterDuffXPFactory>(); |
| 713 | } |
| 714 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 715 | GrXPFactory* GrPorterDuffXPFactory::Create(SkXfermode::Mode xfermode) { |
| 716 | static GrPorterDuffXPFactory gClearPDXPF(SkXfermode::kClear_Mode); |
| 717 | static GrPorterDuffXPFactory gSrcPDXPF(SkXfermode::kSrc_Mode); |
| 718 | static GrPorterDuffXPFactory gDstPDXPF(SkXfermode::kDst_Mode); |
| 719 | static GrPorterDuffXPFactory gSrcOverPDXPF(SkXfermode::kSrcOver_Mode); |
| 720 | static GrPorterDuffXPFactory gDstOverPDXPF(SkXfermode::kDstOver_Mode); |
| 721 | static GrPorterDuffXPFactory gSrcInPDXPF(SkXfermode::kSrcIn_Mode); |
| 722 | static GrPorterDuffXPFactory gDstInPDXPF(SkXfermode::kDstIn_Mode); |
| 723 | static GrPorterDuffXPFactory gSrcOutPDXPF(SkXfermode::kSrcOut_Mode); |
| 724 | static GrPorterDuffXPFactory gDstOutPDXPF(SkXfermode::kDstOut_Mode); |
| 725 | static GrPorterDuffXPFactory gSrcATopPDXPF(SkXfermode::kSrcATop_Mode); |
| 726 | static GrPorterDuffXPFactory gDstATopPDXPF(SkXfermode::kDstATop_Mode); |
| 727 | static GrPorterDuffXPFactory gXorPDXPF(SkXfermode::kXor_Mode); |
| 728 | static GrPorterDuffXPFactory gPlusPDXPF(SkXfermode::kPlus_Mode); |
| 729 | static GrPorterDuffXPFactory gModulatePDXPF(SkXfermode::kModulate_Mode); |
| 730 | static GrPorterDuffXPFactory gScreenPDXPF(SkXfermode::kScreen_Mode); |
| 731 | |
| 732 | static GrPorterDuffXPFactory* gFactories[] = { |
| 733 | &gClearPDXPF, &gSrcPDXPF, &gDstPDXPF, &gSrcOverPDXPF, &gDstOverPDXPF, &gSrcInPDXPF, |
| 734 | &gDstInPDXPF, &gSrcOutPDXPF, &gDstOutPDXPF, &gSrcATopPDXPF, &gDstATopPDXPF, &gXorPDXPF, |
| 735 | &gPlusPDXPF, &gModulatePDXPF, &gScreenPDXPF |
| 736 | }; |
| 737 | GR_STATIC_ASSERT(SK_ARRAY_COUNT(gFactories) == SkXfermode::kLastCoeffMode + 1); |
| 738 | |
| 739 | if (xfermode < 0 || xfermode > SkXfermode::kLastCoeffMode) { |
| 740 | return NULL; |
egdaniel | c016fb8 | 2014-12-03 11:41:54 -0800 | [diff] [blame] | 741 | } |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 742 | return SkRef(gFactories[xfermode]); |
egdaniel | c016fb8 | 2014-12-03 11:41:54 -0800 | [diff] [blame] | 743 | } |
| 744 | |
bsalomon | 50785a3 | 2015-02-06 07:02:37 -0800 | [diff] [blame] | 745 | GrXferProcessor* |
bsalomon | 4b91f76 | 2015-05-19 09:29:46 -0700 | [diff] [blame] | 746 | GrPorterDuffXPFactory::onCreateXferProcessor(const GrCaps& caps, |
egdaniel | 3ad6570 | 2015-02-17 11:15:47 -0800 | [diff] [blame] | 747 | const GrProcOptInfo& colorPOI, |
bsalomon | 50785a3 | 2015-02-06 07:02:37 -0800 | [diff] [blame] | 748 | const GrProcOptInfo& covPOI, |
bsalomon | 6a44c6a | 2015-05-26 09:49:05 -0700 | [diff] [blame] | 749 | const DstTexture* dstTexture) const { |
egdaniel | 0d5fd11 | 2015-05-12 06:11:35 -0700 | [diff] [blame] | 750 | if (covPOI.isFourChannelOutput()) { |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 751 | SkASSERT(!dstTexture || !dstTexture->texture()); |
| 752 | return PDLCDXferProcessor::Create(fXfermode, colorPOI); |
egdaniel | 9513143 | 2014-12-09 11:15:43 -0800 | [diff] [blame] | 753 | } |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 754 | |
| 755 | BlendFormula blendFormula = get_blend_formula(fXfermode, colorPOI, covPOI); |
| 756 | if (blendFormula.hasSecondaryOutput() && !caps.shaderCaps()->dualSourceBlendingSupport()) { |
| 757 | return ShaderPDXferProcessor::Create(fXfermode, dstTexture); |
| 758 | } |
| 759 | |
| 760 | SkASSERT(!dstTexture || !dstTexture->texture()); |
| 761 | return PorterDuffXferProcessor::Create(blendFormula); |
egdaniel | 378092f | 2014-12-03 10:40:13 -0800 | [diff] [blame] | 762 | } |
| 763 | |
| 764 | bool GrPorterDuffXPFactory::supportsRGBCoverage(GrColor /*knownColor*/, |
| 765 | uint32_t knownColorFlags) const { |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 766 | if (SkXfermode::kSrcOver_Mode == fXfermode && |
egdaniel | 378092f | 2014-12-03 10:40:13 -0800 | [diff] [blame] | 767 | kRGBA_GrColorComponentFlags == knownColorFlags) { |
| 768 | return true; |
| 769 | } |
| 770 | return false; |
| 771 | } |
| 772 | |
egdaniel | 9e4ecdc | 2014-12-18 12:44:55 -0800 | [diff] [blame] | 773 | void GrPorterDuffXPFactory::getInvariantOutput(const GrProcOptInfo& colorPOI, |
| 774 | const GrProcOptInfo& coveragePOI, |
egdaniel | 9e4ecdc | 2014-12-18 12:44:55 -0800 | [diff] [blame] | 775 | GrXPFactory::InvariantOutput* output) const { |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 776 | output->fWillBlendWithDst = true; |
| 777 | output->fBlendedColorFlags = kNone_GrColorComponentFlags; |
| 778 | |
| 779 | // The blend table doesn't support LCD coverage, but these formulas never have invariant output. |
| 780 | if (coveragePOI.isFourChannelOutput()) { |
egdaniel | 9e4ecdc | 2014-12-18 12:44:55 -0800 | [diff] [blame] | 781 | return; |
egdaniel | 9513143 | 2014-12-09 11:15:43 -0800 | [diff] [blame] | 782 | } |
| 783 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 784 | const BlendFormula& blendFormula = get_blend_formula(fXfermode, colorPOI, coveragePOI); |
| 785 | if (blendFormula.usesDstColor()) { |
bungeman | c33db93 | 2015-05-22 17:55:26 -0700 | [diff] [blame] | 786 | return; |
| 787 | } |
| 788 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 789 | SkASSERT(coveragePOI.isSolidWhite()); |
| 790 | SkASSERT(kAdd_GrBlendEquation == blendFormula.fBlendEquation); |
bungeman | c33db93 | 2015-05-22 17:55:26 -0700 | [diff] [blame] | 791 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 792 | output->fWillBlendWithDst = false; |
| 793 | |
| 794 | switch (blendFormula.fSrcCoeff) { |
egdaniel | 9e4ecdc | 2014-12-18 12:44:55 -0800 | [diff] [blame] | 795 | case kZero_GrBlendCoeff: |
| 796 | output->fBlendedColor = 0; |
| 797 | output->fBlendedColorFlags = kRGBA_GrColorComponentFlags; |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 798 | return; |
egdaniel | 9e4ecdc | 2014-12-18 12:44:55 -0800 | [diff] [blame] | 799 | |
| 800 | case kOne_GrBlendCoeff: |
| 801 | output->fBlendedColor = colorPOI.color(); |
| 802 | output->fBlendedColorFlags = colorPOI.validFlags(); |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 803 | return; |
egdaniel | 9e4ecdc | 2014-12-18 12:44:55 -0800 | [diff] [blame] | 804 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 805 | default: return; |
egdaniel | 9e4ecdc | 2014-12-18 12:44:55 -0800 | [diff] [blame] | 806 | } |
egdaniel | 9513143 | 2014-12-09 11:15:43 -0800 | [diff] [blame] | 807 | } |
| 808 | |
bsalomon | 4b91f76 | 2015-05-19 09:29:46 -0700 | [diff] [blame] | 809 | bool GrPorterDuffXPFactory::willReadDstColor(const GrCaps& caps, |
egdaniel | 3ad6570 | 2015-02-17 11:15:47 -0800 | [diff] [blame] | 810 | const GrProcOptInfo& colorPOI, |
egdaniel | e36914c | 2015-02-13 09:00:33 -0800 | [diff] [blame] | 811 | const GrProcOptInfo& coveragePOI) const { |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 812 | if (coveragePOI.isFourChannelOutput()) { |
| 813 | return false; // The LCD XP never does a dst read. |
bungeman | c33db93 | 2015-05-22 17:55:26 -0700 | [diff] [blame] | 814 | } |
| 815 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 816 | // We fallback on the shader XP when the blend formula would use dual source blending but we |
| 817 | // don't have support for it. |
| 818 | return !caps.shaderCaps()->dualSourceBlendingSupport() && |
| 819 | get_blend_formula(fXfermode, colorPOI, coveragePOI).hasSecondaryOutput(); |
bsalomon | 50785a3 | 2015-02-06 07:02:37 -0800 | [diff] [blame] | 820 | } |
| 821 | |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 822 | GR_DEFINE_XP_FACTORY_TEST(GrPorterDuffXPFactory); |
| 823 | |
| 824 | GrXPFactory* GrPorterDuffXPFactory::TestCreate(SkRandom* random, |
| 825 | GrContext*, |
bsalomon | 4b91f76 | 2015-05-19 09:29:46 -0700 | [diff] [blame] | 826 | const GrCaps&, |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 827 | GrTexture*[]) { |
egdaniel | b197b8f | 2015-02-17 07:34:43 -0800 | [diff] [blame] | 828 | SkXfermode::Mode mode = SkXfermode::Mode(random->nextULessThan(SkXfermode::kLastCoeffMode)); |
| 829 | return GrPorterDuffXPFactory::Create(mode); |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 830 | } |
egdaniel | 9513143 | 2014-12-09 11:15:43 -0800 | [diff] [blame] | 831 | |
cdalton | 6fd158e | 2015-05-27 15:08:33 -0700 | [diff] [blame^] | 832 | void GrPorterDuffXPFactory::TestGetXPOutputTypes(const GrXferProcessor* xp, |
| 833 | int* outPrimary, |
| 834 | int* outSecondary) { |
| 835 | if (!!strcmp(xp->name(), "Porter Duff")) { |
| 836 | *outPrimary = *outSecondary = -1; |
| 837 | return; |
| 838 | } |
| 839 | BlendFormula blendFormula = static_cast<const PorterDuffXferProcessor*>(xp)->getBlendFormula(); |
| 840 | *outPrimary = blendFormula.fPrimaryOutputType; |
| 841 | *outSecondary = blendFormula.fSecondaryOutputType; |
| 842 | } |
| 843 | |