| 1 | /* |
|---|
| 2 | * Copyright 2017 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 | |
|---|
| 8 | #ifndef SKSL_PIPELINESTAGECODEGENERATOR |
|---|
| 9 | #define SKSL_PIPELINESTAGECODEGENERATOR |
|---|
| 10 | |
|---|
| 11 | #include "include/core/SkTypes.h" |
|---|
| 12 | |
|---|
| 13 | #if defined(SKSL_STANDALONE) || defined(SK_GANESH) || defined(SK_GRAPHITE) |
|---|
| 14 | |
|---|
| 15 | #include <string> |
|---|
| 16 | |
|---|
| 17 | namespace SkSL { |
|---|
| 18 | |
|---|
| 19 | struct Program; |
|---|
| 20 | class VarDeclaration; |
|---|
| 21 | |
|---|
| 22 | namespace PipelineStage { |
|---|
| 23 | class Callbacks { |
|---|
| 24 | public: |
|---|
| 25 | virtual ~Callbacks() = default; |
|---|
| 26 | |
|---|
| 27 | virtual std::string getMainName() { return "main" ; } |
|---|
| 28 | virtual std::string getMangledName(const char* name) { return name; } |
|---|
| 29 | virtual void defineFunction(const char* declaration, const char* body, bool isMain) = 0; |
|---|
| 30 | virtual void declareFunction(const char* declaration) = 0; |
|---|
| 31 | virtual void defineStruct(const char* definition) = 0; |
|---|
| 32 | virtual void declareGlobal(const char* declaration) = 0; |
|---|
| 33 | |
|---|
| 34 | virtual std::string declareUniform(const VarDeclaration*) = 0; |
|---|
| 35 | virtual std::string sampleShader(int index, std::string coords) = 0; |
|---|
| 36 | virtual std::string sampleColorFilter(int index, std::string color) = 0; |
|---|
| 37 | virtual std::string sampleBlender(int index, std::string src, std::string dst) = 0; |
|---|
| 38 | |
|---|
| 39 | virtual std::string toLinearSrgb(std::string color) = 0; |
|---|
| 40 | virtual std::string fromLinearSrgb(std::string color) = 0; |
|---|
| 41 | }; |
|---|
| 42 | |
|---|
| 43 | /* |
|---|
| 44 | * Processes 'program' for use in a GrFragmentProcessor, or other context that wants SkSL-like |
|---|
| 45 | * code as input. To support fragment processor usage, there are callbacks that allow elements |
|---|
| 46 | * to be declared programmatically and to rename those elements (mangling to avoid collisions). |
|---|
| 47 | * |
|---|
| 48 | * - Any reference to the main coords builtin variable will be replaced with 'sampleCoords'. |
|---|
| 49 | * - Any reference to the input color builtin variable will be replaced with 'inputColor'. |
|---|
| 50 | * - Any reference to the dest color builtin variable will be replaced with 'destColor'. |
|---|
| 51 | * Dest-color is used in blend programs. |
|---|
| 52 | * - Each uniform variable declaration triggers a call to 'declareUniform', which should emit |
|---|
| 53 | * the declaration, and return the (possibly different) name to use for the variable. |
|---|
| 54 | * - Each function definition triggers a call to 'defineFunction', which should emit the |
|---|
| 55 | * definition, and return the (possibly different) name to use for calls to that function. |
|---|
| 56 | * - Each invocation of sample() triggers a call to 'sampleChild', which should return the full |
|---|
| 57 | * text of the call expression. |
|---|
| 58 | */ |
|---|
| 59 | void ConvertProgram(const Program& program, |
|---|
| 60 | const char* sampleCoords, |
|---|
| 61 | const char* inputColor, |
|---|
| 62 | const char* destColor, |
|---|
| 63 | Callbacks* callbacks); |
|---|
| 64 | } // namespace PipelineStage |
|---|
| 65 | |
|---|
| 66 | } // namespace SkSL |
|---|
| 67 | |
|---|
| 68 | #endif |
|---|
| 69 | |
|---|
| 70 | #endif |
|---|
| 71 | |
|---|
