egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 1 | /* |
egdaniel | fa4cc8b | 2015-11-13 08:34:52 -0800 | [diff] [blame] | 2 | * Copyright 2015 Google Inc. |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 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 | fa4cc8b | 2015-11-13 08:34:52 -0800 | [diff] [blame] | 8 | #ifndef GrGLSLXferProcessor_DEFINED |
| 9 | #define GrGLSLXferProcessor_DEFINED |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 10 | |
egdaniel | 018fb62 | 2015-10-28 07:26:40 -0700 | [diff] [blame] | 11 | #include "glsl/GrGLSLProgramDataManager.h" |
egdaniel | 7dc4bd0 | 2015-10-29 07:57:01 -0700 | [diff] [blame] | 12 | #include "glsl/GrGLSLTextureSampler.h" |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 13 | |
bsalomon | 50785a3 | 2015-02-06 07:02:37 -0800 | [diff] [blame] | 14 | class GrXferProcessor; |
egdaniel | 7ea439b | 2015-12-03 09:20:44 -0800 | [diff] [blame] | 15 | class GrGLSLCaps; |
| 16 | class GrGLSLUniformHandler; |
egdaniel | a2e3e0f | 2015-11-19 07:23:45 -0800 | [diff] [blame] | 17 | class GrGLSLXPBuilder; |
| 18 | class GrGLSLXPFragmentBuilder; |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 19 | |
egdaniel | fa4cc8b | 2015-11-13 08:34:52 -0800 | [diff] [blame] | 20 | class GrGLSLXferProcessor { |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 21 | public: |
egdaniel | fa4cc8b | 2015-11-13 08:34:52 -0800 | [diff] [blame] | 22 | GrGLSLXferProcessor() {} |
| 23 | virtual ~GrGLSLXferProcessor() {} |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 24 | |
egdaniel | 7dc4bd0 | 2015-10-29 07:57:01 -0700 | [diff] [blame] | 25 | typedef GrGLSLTextureSampler::TextureSamplerArray TextureSamplerArray; |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 26 | struct EmitArgs { |
egdaniel | 7ea439b | 2015-12-03 09:20:44 -0800 | [diff] [blame] | 27 | EmitArgs(GrGLSLXPFragmentBuilder* fragBuilder, |
| 28 | GrGLSLUniformHandler* uniformHandler, |
egdaniel | a2e3e0f | 2015-11-19 07:23:45 -0800 | [diff] [blame] | 29 | const GrGLSLCaps* caps, |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 30 | const GrXferProcessor& xp, |
| 31 | const char* inputColor, |
| 32 | const char* inputCoverage, |
| 33 | const char* outputPrimary, |
| 34 | const char* outputSecondary, |
ethannicholas | 2279325 | 2016-01-30 09:59:10 -0800 | [diff] [blame] | 35 | const TextureSamplerArray& samplers, |
| 36 | const bool usePLSDstRead) |
egdaniel | 7ea439b | 2015-12-03 09:20:44 -0800 | [diff] [blame] | 37 | : fXPFragBuilder(fragBuilder) |
| 38 | , fUniformHandler(uniformHandler) |
egdaniel | a2e3e0f | 2015-11-19 07:23:45 -0800 | [diff] [blame] | 39 | , fGLSLCaps(caps) |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 40 | , fXP(xp) |
| 41 | , fInputColor(inputColor) |
| 42 | , fInputCoverage(inputCoverage) |
| 43 | , fOutputPrimary(outputPrimary) |
| 44 | , fOutputSecondary(outputSecondary) |
ethannicholas | 2279325 | 2016-01-30 09:59:10 -0800 | [diff] [blame] | 45 | , fSamplers(samplers) |
| 46 | , fUsePLSDstRead(usePLSDstRead) {} |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 47 | |
egdaniel | 4ca2e60 | 2015-11-18 08:01:26 -0800 | [diff] [blame] | 48 | GrGLSLXPFragmentBuilder* fXPFragBuilder; |
egdaniel | 7ea439b | 2015-12-03 09:20:44 -0800 | [diff] [blame] | 49 | GrGLSLUniformHandler* fUniformHandler; |
egdaniel | a2e3e0f | 2015-11-19 07:23:45 -0800 | [diff] [blame] | 50 | const GrGLSLCaps* fGLSLCaps; |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 51 | const GrXferProcessor& fXP; |
| 52 | const char* fInputColor; |
| 53 | const char* fInputCoverage; |
| 54 | const char* fOutputPrimary; |
| 55 | const char* fOutputSecondary; |
| 56 | const TextureSamplerArray& fSamplers; |
ethannicholas | 2279325 | 2016-01-30 09:59:10 -0800 | [diff] [blame] | 57 | bool fUsePLSDstRead; |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 58 | }; |
| 59 | /** |
| 60 | * This is similar to emitCode() in the base class, except it takes a full shader builder. |
| 61 | * This allows the effect subclass to emit vertex code. |
| 62 | */ |
bsalomon | 50785a3 | 2015-02-06 07:02:37 -0800 | [diff] [blame] | 63 | void emitCode(const EmitArgs&); |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 64 | |
egdaniel | fa4cc8b | 2015-11-13 08:34:52 -0800 | [diff] [blame] | 65 | /** A GrGLSLXferProcessor instance can be reused with any GrGLSLXferProcessor that produces |
| 66 | the same stage key; this function reads data from a GrGLSLXferProcessor and uploads any |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 67 | uniform variables required by the shaders created in emitCode(). The GrXferProcessor |
egdaniel | fa4cc8b | 2015-11-13 08:34:52 -0800 | [diff] [blame] | 68 | parameter is guaranteed to be of the same type that created this GrGLSLXferProcessor and |
| 69 | to have an identical processor key as the one that created this GrGLSLXferProcessor. This |
| 70 | function calls onSetData on the subclass of GrGLSLXferProcessor |
bsalomon | 50785a3 | 2015-02-06 07:02:37 -0800 | [diff] [blame] | 71 | */ |
egdaniel | 018fb62 | 2015-10-28 07:26:40 -0700 | [diff] [blame] | 72 | void setData(const GrGLSLProgramDataManager& pdm, const GrXferProcessor& xp); |
bsalomon | 50785a3 | 2015-02-06 07:02:37 -0800 | [diff] [blame] | 73 | |
robertphillips | 727b7d2 | 2016-01-26 12:07:13 -0800 | [diff] [blame] | 74 | protected: |
| 75 | static void DefaultCoverageModulation(GrGLSLXPFragmentBuilder* fragBuilder, |
| 76 | const char* srcCoverage, |
| 77 | const char* dstColor, |
| 78 | const char* outColor, |
| 79 | const char* outColorSecondary, |
| 80 | const GrXferProcessor& proc); |
robertphillips | f42fca4 | 2016-01-27 05:00:04 -0800 | [diff] [blame] | 81 | |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 82 | private: |
cdalton | edbb31f | 2015-06-08 12:14:44 -0700 | [diff] [blame] | 83 | /** |
| 84 | * Called by emitCode() when the XP will not be performing a dst read. This method is |
| 85 | * responsible for both blending and coverage. A subclass only needs to implement this method if |
| 86 | * it can construct a GrXferProcessor that will not read the dst color. |
| 87 | */ |
| 88 | virtual void emitOutputsForBlendState(const EmitArgs&) { |
| 89 | SkFAIL("emitOutputsForBlendState not implemented."); |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * Called by emitCode() when the XP will perform a dst read. This method only needs to supply |
| 94 | * the blending logic. The base class applies coverage. A subclass only needs to implement this |
| 95 | * method if it can construct a GrXferProcessor that reads the dst color. |
| 96 | */ |
egdaniel | 7ea439b | 2015-12-03 09:20:44 -0800 | [diff] [blame] | 97 | virtual void emitBlendCodeForDstRead(GrGLSLXPFragmentBuilder*, |
| 98 | GrGLSLUniformHandler*, |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 99 | const char* srcColor, |
egdaniel | f34b293 | 2015-12-01 13:54:06 -0800 | [diff] [blame] | 100 | const char* srcCoverage, |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 101 | const char* dstColor, |
| 102 | const char* outColor, |
egdaniel | f34b293 | 2015-12-01 13:54:06 -0800 | [diff] [blame] | 103 | const char* outColorSecondary, |
egdaniel | 8dcdedc | 2015-11-11 06:27:20 -0800 | [diff] [blame] | 104 | const GrXferProcessor&) { |
cdalton | edbb31f | 2015-06-08 12:14:44 -0700 | [diff] [blame] | 105 | SkFAIL("emitBlendCodeForDstRead not implemented."); |
| 106 | } |
bsalomon | 50785a3 | 2015-02-06 07:02:37 -0800 | [diff] [blame] | 107 | |
egdaniel | 018fb62 | 2015-10-28 07:26:40 -0700 | [diff] [blame] | 108 | virtual void onSetData(const GrGLSLProgramDataManager&, const GrXferProcessor&) = 0; |
bsalomon | 50785a3 | 2015-02-06 07:02:37 -0800 | [diff] [blame] | 109 | |
egdaniel | 018fb62 | 2015-10-28 07:26:40 -0700 | [diff] [blame] | 110 | GrGLSLProgramDataManager::UniformHandle fDstTopLeftUni; |
| 111 | GrGLSLProgramDataManager::UniformHandle fDstScaleUni; |
egdaniel | c230414 | 2014-12-11 13:15:13 -0800 | [diff] [blame] | 112 | }; |
| 113 | #endif |