Jim Van Verth | 75c5326 | 2019-04-26 12:23:51 -0400 | [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 | |
| 8 | #include "src/gpu/GrStencilSettings.h" |
| 9 | #include "src/gpu/mtl/GrMtlDepthStencil.h" |
| 10 | #include "src/gpu/mtl/GrMtlGpu.h" |
| 11 | |
Jim Van Verth | cf23f58 | 2019-05-22 09:46:57 -0400 | [diff] [blame] | 12 | #if !__has_feature(objc_arc) |
| 13 | #error This file must be compiled with Arc. Use -fobjc-arc flag |
| 14 | #endif |
| 15 | |
Jim Van Verth | 75c5326 | 2019-04-26 12:23:51 -0400 | [diff] [blame] | 16 | MTLStencilOperation skia_stencil_op_to_mtl(GrStencilOp op) { |
| 17 | switch (op) { |
| 18 | case GrStencilOp::kKeep: |
| 19 | return MTLStencilOperationKeep; |
| 20 | case GrStencilOp::kZero: |
| 21 | return MTLStencilOperationZero; |
| 22 | case GrStencilOp::kReplace: |
| 23 | return MTLStencilOperationReplace; |
| 24 | case GrStencilOp::kInvert: |
| 25 | return MTLStencilOperationInvert; |
| 26 | case GrStencilOp::kIncWrap: |
| 27 | return MTLStencilOperationIncrementWrap; |
| 28 | case GrStencilOp::kDecWrap: |
| 29 | return MTLStencilOperationDecrementWrap; |
| 30 | case GrStencilOp::kIncClamp: |
| 31 | return MTLStencilOperationIncrementClamp; |
| 32 | case GrStencilOp::kDecClamp: |
| 33 | return MTLStencilOperationDecrementClamp; |
| 34 | } |
| 35 | } |
| 36 | |
| 37 | MTLStencilDescriptor* skia_stencil_to_mtl(GrStencilSettings::Face face) { |
| 38 | MTLStencilDescriptor* result = [[MTLStencilDescriptor alloc] init]; |
| 39 | switch (face.fTest) { |
| 40 | case GrStencilTest::kAlways: |
| 41 | result.stencilCompareFunction = MTLCompareFunctionAlways; |
| 42 | break; |
| 43 | case GrStencilTest::kNever: |
| 44 | result.stencilCompareFunction = MTLCompareFunctionNever; |
| 45 | break; |
| 46 | case GrStencilTest::kGreater: |
| 47 | result.stencilCompareFunction = MTLCompareFunctionGreater; |
| 48 | break; |
| 49 | case GrStencilTest::kGEqual: |
| 50 | result.stencilCompareFunction = MTLCompareFunctionGreaterEqual; |
| 51 | break; |
| 52 | case GrStencilTest::kLess: |
| 53 | result.stencilCompareFunction = MTLCompareFunctionLess; |
| 54 | break; |
| 55 | case GrStencilTest::kLEqual: |
| 56 | result.stencilCompareFunction = MTLCompareFunctionLessEqual; |
| 57 | break; |
| 58 | case GrStencilTest::kEqual: |
| 59 | result.stencilCompareFunction = MTLCompareFunctionEqual; |
| 60 | break; |
| 61 | case GrStencilTest::kNotEqual: |
| 62 | result.stencilCompareFunction = MTLCompareFunctionNotEqual; |
| 63 | break; |
| 64 | } |
| 65 | result.readMask = face.fTestMask; |
| 66 | result.writeMask = face.fWriteMask; |
| 67 | result.depthStencilPassOperation = skia_stencil_op_to_mtl(face.fPassOp); |
| 68 | result.stencilFailureOperation = skia_stencil_op_to_mtl(face.fFailOp); |
| 69 | return result; |
| 70 | } |
| 71 | |
| 72 | GrMtlDepthStencil* GrMtlDepthStencil::Create(const GrMtlGpu* gpu, |
| 73 | const GrStencilSettings& stencil, |
| 74 | GrSurfaceOrigin origin) { |
| 75 | MTLDepthStencilDescriptor* desc = [[MTLDepthStencilDescriptor alloc] init]; |
| 76 | if (!stencil.isDisabled()) { |
| 77 | if (stencil.isTwoSided()) { |
Chris Dalton | 67d43fe | 2019-11-05 23:01:21 -0700 | [diff] [blame] | 78 | desc.frontFaceStencil = skia_stencil_to_mtl(stencil.postOriginCCWFace(origin)); |
| 79 | desc.backFaceStencil = skia_stencil_to_mtl(stencil.postOriginCWFace(origin)); |
Jim Van Verth | 75c5326 | 2019-04-26 12:23:51 -0400 | [diff] [blame] | 80 | } |
| 81 | else { |
Chris Dalton | 67d43fe | 2019-11-05 23:01:21 -0700 | [diff] [blame] | 82 | desc.frontFaceStencil = skia_stencil_to_mtl(stencil.singleSidedFace()); |
Jim Van Verth | 75c5326 | 2019-04-26 12:23:51 -0400 | [diff] [blame] | 83 | desc.backFaceStencil = desc.frontFaceStencil; |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | return new GrMtlDepthStencil([gpu->device() newDepthStencilStateWithDescriptor: desc], |
| 88 | GenerateKey(stencil, origin)); |
| 89 | } |
| 90 | |
| 91 | void skia_stencil_to_key(GrStencilSettings::Face face, GrMtlDepthStencil::Key::Face* faceKey) { |
| 92 | const int kPassOpShift = 3; |
| 93 | const int kFailOpShift = 6; |
| 94 | |
| 95 | faceKey->fReadMask = face.fTestMask; |
| 96 | faceKey->fWriteMask = face.fWriteMask; |
| 97 | |
| 98 | SkASSERT(static_cast<int>(face.fTest) <= 7); |
| 99 | faceKey->fOps = static_cast<uint32_t>(face.fTest); |
| 100 | |
| 101 | SkASSERT(static_cast<int>(face.fPassOp) <= 7); |
| 102 | faceKey->fOps |= (static_cast<uint32_t>(face.fPassOp) << kPassOpShift); |
| 103 | |
| 104 | SkASSERT(static_cast<int>(face.fFailOp) <= 7); |
| 105 | faceKey->fOps |= (static_cast<uint32_t>(face.fFailOp) << kFailOpShift); |
| 106 | } |
| 107 | |
| 108 | GrMtlDepthStencil::Key GrMtlDepthStencil::GenerateKey(const GrStencilSettings& stencil, |
| 109 | GrSurfaceOrigin origin) { |
| 110 | Key depthStencilKey; |
| 111 | |
| 112 | if (stencil.isDisabled()) { |
| 113 | memset(&depthStencilKey, 0, sizeof(Key)); |
| 114 | } else { |
| 115 | if (stencil.isTwoSided()) { |
Chris Dalton | 67d43fe | 2019-11-05 23:01:21 -0700 | [diff] [blame] | 116 | skia_stencil_to_key(stencil.postOriginCCWFace(origin), &depthStencilKey.fFront); |
| 117 | skia_stencil_to_key(stencil.postOriginCWFace(origin), &depthStencilKey.fBack); |
Jim Van Verth | 75c5326 | 2019-04-26 12:23:51 -0400 | [diff] [blame] | 118 | } |
| 119 | else { |
Chris Dalton | 67d43fe | 2019-11-05 23:01:21 -0700 | [diff] [blame] | 120 | skia_stencil_to_key(stencil.singleSidedFace(), &depthStencilKey.fFront); |
Jim Van Verth | 75c5326 | 2019-04-26 12:23:51 -0400 | [diff] [blame] | 121 | memcpy(&depthStencilKey.fBack, &depthStencilKey.fFront, sizeof(Key::Face)); |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | return depthStencilKey; |
| 126 | } |