Ethan Nicholas | 130fb3f | 2018-02-01 12:14:34 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2018 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 | |
Ethan Nicholas | e9d172a | 2017-11-20 12:12:24 -0500 | [diff] [blame] | 8 | enum class InputMode { |
| 9 | kIgnore, |
| 10 | kModulateRGBA, |
| 11 | kModulateA, |
| 12 | |
| 13 | kLast = kModulateA |
| 14 | }; |
| 15 | |
Michael Ludwig | a427559 | 2018-08-31 10:52:47 -0400 | [diff] [blame^] | 16 | layout(ctype=GrColor4f, tracked) in uniform half4 color; |
Ethan Nicholas | e9d172a | 2017-11-20 12:12:24 -0500 | [diff] [blame] | 17 | layout(key) in InputMode mode; |
| 18 | |
| 19 | @optimizationFlags { |
| 20 | OptFlags(color, mode) |
| 21 | } |
| 22 | |
| 23 | void main() { |
| 24 | @switch (mode) { |
| 25 | case InputMode::kIgnore: |
Michael Ludwig | a427559 | 2018-08-31 10:52:47 -0400 | [diff] [blame^] | 26 | sk_OutColor = color; |
Ethan Nicholas | e9d172a | 2017-11-20 12:12:24 -0500 | [diff] [blame] | 27 | break; |
| 28 | case InputMode::kModulateRGBA: |
Michael Ludwig | a427559 | 2018-08-31 10:52:47 -0400 | [diff] [blame^] | 29 | sk_OutColor = sk_InColor * color; |
Ethan Nicholas | e9d172a | 2017-11-20 12:12:24 -0500 | [diff] [blame] | 30 | break; |
| 31 | case InputMode::kModulateA: |
Michael Ludwig | a427559 | 2018-08-31 10:52:47 -0400 | [diff] [blame^] | 32 | sk_OutColor = sk_InColor.a * color; |
Ethan Nicholas | e9d172a | 2017-11-20 12:12:24 -0500 | [diff] [blame] | 33 | break; |
| 34 | } |
| 35 | } |
| 36 | |
Ethan Nicholas | e9d172a | 2017-11-20 12:12:24 -0500 | [diff] [blame] | 37 | @class { |
| 38 | static const int kInputModeCnt = (int) InputMode::kLast + 1; |
| 39 | |
| 40 | static OptimizationFlags OptFlags(GrColor4f color, InputMode mode) { |
| 41 | OptimizationFlags flags = kConstantOutputForConstantInput_OptimizationFlag; |
| 42 | if (mode != InputMode::kIgnore) { |
| 43 | flags |= kCompatibleWithCoverageAsAlpha_OptimizationFlag; |
| 44 | } |
| 45 | if (color.isOpaque()) { |
| 46 | flags |= kPreservesOpaqueInput_OptimizationFlag; |
| 47 | } |
| 48 | return flags; |
| 49 | } |
| 50 | |
| 51 | GrColor4f constantOutputForConstantInput(GrColor4f input) const override { |
| 52 | switch (fMode) { |
| 53 | case InputMode::kIgnore: |
| 54 | return fColor; |
| 55 | case InputMode::kModulateA: |
| 56 | return fColor.mulByScalar(input.fRGBA[3]); |
| 57 | case InputMode::kModulateRGBA: |
| 58 | return fColor.modulate(input); |
| 59 | } |
| 60 | SK_ABORT("Unexpected mode"); |
| 61 | return GrColor4f::TransparentBlack(); |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | @test(d) { |
| 66 | GrColor4f color; |
| 67 | int colorPicker = d->fRandom->nextULessThan(3); |
| 68 | switch (colorPicker) { |
| 69 | case 0: { |
| 70 | uint32_t a = d->fRandom->nextULessThan(0x100); |
| 71 | uint32_t r = d->fRandom->nextULessThan(a+1); |
| 72 | uint32_t g = d->fRandom->nextULessThan(a+1); |
| 73 | uint32_t b = d->fRandom->nextULessThan(a+1); |
| 74 | color = GrColor4f::FromGrColor(GrColorPackRGBA(r, g, b, a)); |
| 75 | break; |
| 76 | } |
| 77 | case 1: |
| 78 | color = GrColor4f::TransparentBlack(); |
| 79 | break; |
| 80 | case 2: |
| 81 | uint32_t c = d->fRandom->nextULessThan(0x100); |
| 82 | color = GrColor4f::FromGrColor(c | (c << 8) | (c << 16) | (c << 24)); |
| 83 | break; |
| 84 | } |
| 85 | InputMode mode = static_cast<InputMode>(d->fRandom->nextULessThan(kInputModeCnt)); |
| 86 | return GrConstColorProcessor::Make(color, mode); |
Michael Ludwig | a427559 | 2018-08-31 10:52:47 -0400 | [diff] [blame^] | 87 | } |