| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "GrAAFillRectBatch.h" |
| |
| #include "GrColor.h" |
| #include "GrDefaultGeoProcFactory.h" |
| #include "GrResourceKey.h" |
| #include "GrResourceProvider.h" |
| #include "GrTInstanceBatch.h" |
| #include "GrTypes.h" |
| #include "SkMatrix.h" |
| #include "SkRect.h" |
| |
| GR_DECLARE_STATIC_UNIQUE_KEY(gAAFillRectIndexBufferKey); |
| |
| static void set_inset_fan(SkPoint* pts, size_t stride, |
| const SkRect& r, SkScalar dx, SkScalar dy) { |
| pts->setRectFan(r.fLeft + dx, r.fTop + dy, |
| r.fRight - dx, r.fBottom - dy, stride); |
| } |
| |
| static const int kNumAAFillRectsInIndexBuffer = 256; |
| static const int kVertsPerAAFillRect = 8; |
| static const int kIndicesPerAAFillRect = 30; |
| |
| const GrIndexBuffer* get_index_buffer(GrResourceProvider* resourceProvider) { |
| GR_DEFINE_STATIC_UNIQUE_KEY(gAAFillRectIndexBufferKey); |
| |
| static const uint16_t gFillAARectIdx[] = { |
| 0, 1, 5, 5, 4, 0, |
| 1, 2, 6, 6, 5, 1, |
| 2, 3, 7, 7, 6, 2, |
| 3, 0, 4, 4, 7, 3, |
| 4, 5, 6, 6, 7, 4, |
| }; |
| GR_STATIC_ASSERT(SK_ARRAY_COUNT(gFillAARectIdx) == kIndicesPerAAFillRect); |
| return resourceProvider->findOrCreateInstancedIndexBuffer(gFillAARectIdx, |
| kIndicesPerAAFillRect, kNumAAFillRectsInIndexBuffer, kVertsPerAAFillRect, |
| gAAFillRectIndexBufferKey); |
| } |
| |
| static const GrGeometryProcessor* create_fill_rect_gp( |
| const SkMatrix& viewMatrix, |
| const GrPipelineOptimizations& opts, |
| GrDefaultGeoProcFactory::LocalCoords::Type localCoordsType) { |
| using namespace GrDefaultGeoProcFactory; |
| |
| Color color(Color::kAttribute_Type); |
| Coverage::Type coverageType; |
| // TODO remove coverage if coverage is ignored |
| /*if (coverageIgnored) { |
| coverageType = Coverage::kNone_Type; |
| } else*/ if (opts.canTweakAlphaForCoverage()) { |
| coverageType = Coverage::kSolid_Type; |
| } else { |
| coverageType = Coverage::kAttribute_Type; |
| } |
| Coverage coverage(coverageType); |
| |
| // We assume the caller has inverted the viewmatrix |
| if (LocalCoords::kHasExplicit_Type == localCoordsType) { |
| LocalCoords localCoords(localCoordsType); |
| return GrDefaultGeoProcFactory::Create(color, coverage, localCoords, SkMatrix::I()); |
| } else { |
| LocalCoords localCoords(opts.readsLocalCoords() ? localCoordsType : |
| LocalCoords::kUnused_Type); |
| return CreateForDeviceSpace(color, coverage, localCoords, viewMatrix); |
| } |
| } |
| |
| static void generate_aa_fill_rect_geometry(intptr_t verts, |
| size_t vertexStride, |
| GrColor color, |
| const SkMatrix& viewMatrix, |
| const SkRect& rect, |
| const SkRect& devRect, |
| const GrPipelineOptimizations& opts, |
| const SkMatrix* localMatrix) { |
| SkPoint* fan0Pos = reinterpret_cast<SkPoint*>(verts); |
| SkPoint* fan1Pos = reinterpret_cast<SkPoint*>(verts + 4 * vertexStride); |
| |
| SkScalar inset = SkMinScalar(devRect.width(), SK_Scalar1); |
| inset = SK_ScalarHalf * SkMinScalar(inset, devRect.height()); |
| |
| if (viewMatrix.rectStaysRect()) { |
| set_inset_fan(fan0Pos, vertexStride, devRect, -SK_ScalarHalf, -SK_ScalarHalf); |
| set_inset_fan(fan1Pos, vertexStride, devRect, inset, inset); |
| } else { |
| // compute transformed (1, 0) and (0, 1) vectors |
| SkVector vec[2] = { |
| { viewMatrix[SkMatrix::kMScaleX], viewMatrix[SkMatrix::kMSkewY] }, |
| { viewMatrix[SkMatrix::kMSkewX], viewMatrix[SkMatrix::kMScaleY] } |
| }; |
| |
| vec[0].normalize(); |
| vec[0].scale(SK_ScalarHalf); |
| vec[1].normalize(); |
| vec[1].scale(SK_ScalarHalf); |
| |
| // create the rotated rect |
| fan0Pos->setRectFan(rect.fLeft, rect.fTop, |
| rect.fRight, rect.fBottom, vertexStride); |
| viewMatrix.mapPointsWithStride(fan0Pos, vertexStride, 4); |
| |
| // Now create the inset points and then outset the original |
| // rotated points |
| |
| // TL |
| *((SkPoint*)((intptr_t)fan1Pos + 0 * vertexStride)) = |
| *((SkPoint*)((intptr_t)fan0Pos + 0 * vertexStride)) + vec[0] + vec[1]; |
| *((SkPoint*)((intptr_t)fan0Pos + 0 * vertexStride)) -= vec[0] + vec[1]; |
| // BL |
| *((SkPoint*)((intptr_t)fan1Pos + 1 * vertexStride)) = |
| *((SkPoint*)((intptr_t)fan0Pos + 1 * vertexStride)) + vec[0] - vec[1]; |
| *((SkPoint*)((intptr_t)fan0Pos + 1 * vertexStride)) -= vec[0] - vec[1]; |
| // BR |
| *((SkPoint*)((intptr_t)fan1Pos + 2 * vertexStride)) = |
| *((SkPoint*)((intptr_t)fan0Pos + 2 * vertexStride)) - vec[0] - vec[1]; |
| *((SkPoint*)((intptr_t)fan0Pos + 2 * vertexStride)) += vec[0] + vec[1]; |
| // TR |
| *((SkPoint*)((intptr_t)fan1Pos + 3 * vertexStride)) = |
| *((SkPoint*)((intptr_t)fan0Pos + 3 * vertexStride)) - vec[0] + vec[1]; |
| *((SkPoint*)((intptr_t)fan0Pos + 3 * vertexStride)) += vec[0] - vec[1]; |
| } |
| |
| if (localMatrix) { |
| SkMatrix invViewMatrix; |
| if (!viewMatrix.invert(&invViewMatrix)) { |
| SkASSERT(false); |
| invViewMatrix = SkMatrix::I(); |
| } |
| SkMatrix localCoordMatrix; |
| localCoordMatrix.setConcat(*localMatrix, invViewMatrix); |
| SkPoint* fan0Loc = reinterpret_cast<SkPoint*>(verts + sizeof(SkPoint) + sizeof(GrColor)); |
| localCoordMatrix.mapPointsWithStride(fan0Loc, fan0Pos, vertexStride, 8); |
| } |
| |
| bool tweakAlphaForCoverage = opts.canTweakAlphaForCoverage(); |
| |
| // Make verts point to vertex color and then set all the color and coverage vertex attrs |
| // values. |
| verts += sizeof(SkPoint); |
| |
| // The coverage offset is always the last vertex attribute |
| intptr_t coverageOffset = vertexStride - sizeof(GrColor) - sizeof(SkPoint); |
| for (int i = 0; i < 4; ++i) { |
| if (tweakAlphaForCoverage) { |
| *reinterpret_cast<GrColor*>(verts + i * vertexStride) = 0; |
| } else { |
| *reinterpret_cast<GrColor*>(verts + i * vertexStride) = color; |
| *reinterpret_cast<float*>(verts + i * vertexStride + coverageOffset) = 0; |
| } |
| } |
| |
| int scale; |
| if (inset < SK_ScalarHalf) { |
| scale = SkScalarFloorToInt(512.0f * inset / (inset + SK_ScalarHalf)); |
| SkASSERT(scale >= 0 && scale <= 255); |
| } else { |
| scale = 0xff; |
| } |
| |
| verts += 4 * vertexStride; |
| |
| float innerCoverage = GrNormalizeByteToFloat(scale); |
| GrColor scaledColor = (0xff == scale) ? color : SkAlphaMulQ(color, scale); |
| |
| for (int i = 0; i < 4; ++i) { |
| if (tweakAlphaForCoverage) { |
| *reinterpret_cast<GrColor*>(verts + i * vertexStride) = scaledColor; |
| } else { |
| *reinterpret_cast<GrColor*>(verts + i * vertexStride) = color; |
| *reinterpret_cast<float*>(verts + i * vertexStride + |
| coverageOffset) = innerCoverage; |
| } |
| } |
| } |
| |
| // Common functions |
| class AAFillRectBatchBase { |
| public: |
| static const int kVertsPerInstance = kVertsPerAAFillRect; |
| static const int kIndicesPerInstance = kIndicesPerAAFillRect; |
| |
| static void InitInvariantOutputCoverage(GrInitInvariantOutput* out) { |
| out->setUnknownSingleComponent(); |
| } |
| |
| static const GrIndexBuffer* GetIndexBuffer(GrResourceProvider* rp) { |
| return get_index_buffer(rp); |
| } |
| |
| template <class Geometry> |
| static void SetBounds(const Geometry& geo, SkRect* outBounds) { |
| *outBounds = geo.fDevRect; |
| } |
| |
| template <class Geometry> |
| static void UpdateBoundsAfterAppend(const Geometry& geo, SkRect* outBounds) { |
| outBounds->join(geo.fDevRect); |
| } |
| }; |
| |
| class AAFillRectBatchNoLocalMatrixImp : public AAFillRectBatchBase { |
| public: |
| struct Geometry { |
| SkMatrix fViewMatrix; |
| SkRect fRect; |
| SkRect fDevRect; |
| GrColor fColor; |
| }; |
| |
| static const char* Name() { return "AAFillRectBatchNoLocalMatrix"; } |
| |
| static bool CanCombine(const Geometry& mine, const Geometry& theirs, |
| const GrPipelineOptimizations& opts) { |
| // We apply the viewmatrix to the rect points on the cpu. However, if the pipeline uses |
| // local coords then we won't be able to batch. We could actually upload the viewmatrix |
| // using vertex attributes in these cases, but haven't investigated that |
| return !opts.readsLocalCoords() || mine.fViewMatrix.cheapEqualTo(theirs.fViewMatrix); |
| } |
| |
| static const GrGeometryProcessor* CreateGP(const Geometry& geo, |
| const GrPipelineOptimizations& opts) { |
| const GrGeometryProcessor* gp = |
| create_fill_rect_gp(geo.fViewMatrix, opts, |
| GrDefaultGeoProcFactory::LocalCoords::kUsePosition_Type); |
| |
| SkASSERT(opts.canTweakAlphaForCoverage() ? |
| gp->getVertexStride() == sizeof(GrDefaultGeoProcFactory::PositionColorAttr) : |
| gp->getVertexStride() == |
| sizeof(GrDefaultGeoProcFactory::PositionColorCoverageAttr)); |
| return gp; |
| } |
| |
| static void Tesselate(intptr_t vertices, size_t vertexStride, const Geometry& geo, |
| const GrPipelineOptimizations& opts) { |
| generate_aa_fill_rect_geometry(vertices, vertexStride, |
| geo.fColor, geo.fViewMatrix, geo.fRect, geo.fDevRect, opts, |
| nullptr); |
| } |
| }; |
| |
| class AAFillRectBatchLocalMatrixImp : public AAFillRectBatchBase { |
| public: |
| struct Geometry { |
| SkMatrix fViewMatrix; |
| SkMatrix fLocalMatrix; |
| SkRect fRect; |
| SkRect fDevRect; |
| GrColor fColor; |
| }; |
| |
| static const char* Name() { return "AAFillRectBatchLocalMatrix"; } |
| |
| static bool CanCombine(const Geometry& mine, const Geometry& theirs, |
| const GrPipelineOptimizations&) { |
| return true; |
| } |
| |
| static const GrGeometryProcessor* CreateGP(const Geometry& geo, |
| const GrPipelineOptimizations& opts) { |
| const GrGeometryProcessor* gp = |
| create_fill_rect_gp(geo.fViewMatrix, opts, |
| GrDefaultGeoProcFactory::LocalCoords::kHasExplicit_Type); |
| |
| SkASSERT(opts.canTweakAlphaForCoverage() ? |
| gp->getVertexStride() == |
| sizeof(GrDefaultGeoProcFactory::PositionColorLocalCoordAttr) : |
| gp->getVertexStride() == |
| sizeof(GrDefaultGeoProcFactory::PositionColorLocalCoordCoverage)); |
| return gp; |
| } |
| |
| static void Tesselate(intptr_t vertices, size_t vertexStride, const Geometry& geo, |
| const GrPipelineOptimizations& opts) { |
| generate_aa_fill_rect_geometry(vertices, vertexStride, |
| geo.fColor, geo.fViewMatrix, geo.fRect, geo.fDevRect, opts, |
| &geo.fLocalMatrix); |
| } |
| }; |
| |
| typedef GrTInstanceBatch<AAFillRectBatchNoLocalMatrixImp> AAFillRectBatchNoLocalMatrix; |
| typedef GrTInstanceBatch<AAFillRectBatchLocalMatrixImp> AAFillRectBatchLocalMatrix; |
| |
| inline static void append_to_batch(AAFillRectBatchNoLocalMatrix* batch, GrColor color, |
| const SkMatrix& viewMatrix, const SkRect& rect, |
| const SkRect& devRect) { |
| AAFillRectBatchNoLocalMatrix::Geometry& geo = batch->geoData()->push_back(); |
| geo.fColor = color; |
| geo.fViewMatrix = viewMatrix; |
| geo.fRect = rect; |
| geo.fDevRect = devRect; |
| } |
| |
| inline static void append_to_batch(AAFillRectBatchLocalMatrix* batch, GrColor color, |
| const SkMatrix& viewMatrix, const SkMatrix& localMatrix, |
| const SkRect& rect, const SkRect& devRect) { |
| AAFillRectBatchLocalMatrix::Geometry& geo = batch->geoData()->push_back(); |
| geo.fColor = color; |
| geo.fViewMatrix = viewMatrix; |
| geo.fLocalMatrix = localMatrix; |
| geo.fRect = rect; |
| geo.fDevRect = devRect; |
| } |
| |
| namespace GrAAFillRectBatch { |
| |
| GrDrawBatch* Create(GrColor color, |
| const SkMatrix& viewMatrix, |
| const SkRect& rect, |
| const SkRect& devRect) { |
| AAFillRectBatchNoLocalMatrix* batch = AAFillRectBatchNoLocalMatrix::Create(); |
| append_to_batch(batch, color, viewMatrix, rect, devRect); |
| batch->init(); |
| return batch; |
| } |
| |
| GrDrawBatch* Create(GrColor color, |
| const SkMatrix& viewMatrix, |
| const SkMatrix& localMatrix, |
| const SkRect& rect, |
| const SkRect& devRect) { |
| AAFillRectBatchLocalMatrix* batch = AAFillRectBatchLocalMatrix::Create(); |
| append_to_batch(batch, color, viewMatrix, localMatrix, rect, devRect); |
| batch->init(); |
| return batch; |
| } |
| |
| GrDrawBatch* Create(GrColor color, |
| const SkMatrix& viewMatrix, |
| const SkMatrix& localMatrix, |
| const SkRect& rect) { |
| SkRect devRect; |
| viewMatrix.mapRect(&devRect, rect); |
| return Create(color, viewMatrix, localMatrix, rect, devRect); |
| } |
| |
| GrDrawBatch* CreateWithLocalRect(GrColor color, |
| const SkMatrix& viewMatrix, |
| const SkRect& rect, |
| const SkRect& localRect) { |
| SkRect devRect; |
| viewMatrix.mapRect(&devRect, rect); |
| SkMatrix localMatrix; |
| if (!localMatrix.setRectToRect(rect, localRect, SkMatrix::kFill_ScaleToFit)) { |
| return nullptr; |
| } |
| return Create(color, viewMatrix, localMatrix, rect, devRect); |
| } |
| |
| void Append(GrBatch* origBatch, |
| GrColor color, |
| const SkMatrix& viewMatrix, |
| const SkRect& rect, |
| const SkRect& devRect) { |
| AAFillRectBatchNoLocalMatrix* batch = origBatch->cast<AAFillRectBatchNoLocalMatrix>(); |
| append_to_batch(batch, color, viewMatrix, rect, devRect); |
| batch->updateBoundsAfterAppend(); |
| } |
| |
| void Append(GrBatch* origBatch, |
| GrColor color, |
| const SkMatrix& viewMatrix, |
| const SkMatrix& localMatrix, |
| const SkRect& rect, |
| const SkRect& devRect) { |
| AAFillRectBatchLocalMatrix* batch = origBatch->cast<AAFillRectBatchLocalMatrix>(); |
| append_to_batch(batch, color, viewMatrix, localMatrix, rect, devRect); |
| batch->updateBoundsAfterAppend(); |
| } |
| |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #ifdef GR_TEST_UTILS |
| |
| #include "GrBatchTest.h" |
| |
| DRAW_BATCH_TEST_DEFINE(AAFillRectBatch) { |
| GrColor color = GrRandomColor(random); |
| SkMatrix viewMatrix = GrTest::TestMatrixInvertible(random); |
| SkRect rect = GrTest::TestRect(random); |
| SkRect devRect = GrTest::TestRect(random); |
| return GrAAFillRectBatch::Create(color, viewMatrix, rect, devRect); |
| } |
| |
| DRAW_BATCH_TEST_DEFINE(AAFillRectBatchLocalMatrix) { |
| GrColor color = GrRandomColor(random); |
| SkMatrix viewMatrix = GrTest::TestMatrixInvertible(random); |
| SkMatrix localMatrix = GrTest::TestMatrix(random); |
| SkRect rect = GrTest::TestRect(random); |
| SkRect devRect = GrTest::TestRect(random); |
| return GrAAFillRectBatch::Create(color, viewMatrix, localMatrix, rect, devRect); |
| } |
| |
| #endif |