180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru/* 280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru * Copyright 2012 Google Inc. 380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru * 480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru * Use of this source code is governed by a BSD-style license that can be 580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru * found in the LICENSE file. 680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru */ 780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru#include "SkTypes.h" 980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 1080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru#include "SkDWriteGeometrySink.h" 1180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru#include "SkFloatUtils.h" 1280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru#include "SkPath.h" 1380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 1480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru#include <dwrite.h> 1580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru#include <d2d1.h> 1680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 1780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste QueruSkDWriteGeometrySink::SkDWriteGeometrySink(SkPath* path) : fRefCount(1), fPath(path) { } 1880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 1980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste QueruSkDWriteGeometrySink::~SkDWriteGeometrySink() { } 2080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 2180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste QueruHRESULT STDMETHODCALLTYPE SkDWriteGeometrySink::QueryInterface(REFIID iid, void **object) { 2280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru if (NULL == object) { 2380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return E_INVALIDARG; 2480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 2580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru if (iid == __uuidof(IUnknown) || iid == __uuidof(IDWriteGeometrySink)) { 2680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru *object = static_cast<IDWriteGeometrySink*>(this); 2780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru this->AddRef(); 2880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return S_OK; 2980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } else { 3080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru *object = NULL; 3180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return E_NOINTERFACE; 3280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 3380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru} 3480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 3580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste QueruULONG STDMETHODCALLTYPE SkDWriteGeometrySink::AddRef(void) { 3680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return static_cast<ULONG>(InterlockedIncrement(&fRefCount)); 3780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru} 3880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 3980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste QueruULONG STDMETHODCALLTYPE SkDWriteGeometrySink::Release(void) { 4080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru ULONG res = static_cast<ULONG>(InterlockedDecrement(&fRefCount)); 4180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru if (0 == res) { 4280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru delete this; 4380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 4480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return res; 4580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru} 4680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 4780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queruvoid STDMETHODCALLTYPE SkDWriteGeometrySink::SetFillMode(D2D1_FILL_MODE fillMode) { 4880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru switch (fillMode) { 4980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru case D2D1_FILL_MODE_ALTERNATE: 5080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru fPath->setFillType(SkPath::kEvenOdd_FillType); 5180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru break; 5280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru case D2D1_FILL_MODE_WINDING: 5380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru fPath->setFillType(SkPath::kWinding_FillType); 5480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru break; 5580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru default: 5680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru SkASSERT(!"Unknown D2D1_FILL_MODE."); 5780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru break; 5880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 5980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru} 6080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 6180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queruvoid STDMETHODCALLTYPE SkDWriteGeometrySink::SetSegmentFlags(D2D1_PATH_SEGMENT vertexFlags) { 6280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru if (vertexFlags == D2D1_PATH_SEGMENT_NONE || vertexFlags == D2D1_PATH_SEGMENT_FORCE_ROUND_LINE_JOIN) { 6380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru SkASSERT(!"Invalid D2D1_PATH_SEGMENT value."); 6480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 6580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru} 6680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 6780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queruvoid STDMETHODCALLTYPE SkDWriteGeometrySink::BeginFigure(D2D1_POINT_2F startPoint, D2D1_FIGURE_BEGIN figureBegin) { 6880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru fPath->moveTo(SkFloatToScalar(startPoint.x), SkFloatToScalar(startPoint.y)); 6980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru if (figureBegin == D2D1_FIGURE_BEGIN_HOLLOW) { 7080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru SkASSERT(!"Invalid D2D1_FIGURE_BEGIN value."); 7180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 7280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru} 7380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 7480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queruvoid STDMETHODCALLTYPE SkDWriteGeometrySink::AddLines(const D2D1_POINT_2F *points, UINT pointsCount) { 7580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru for (const D2D1_POINT_2F *end = &points[pointsCount]; points < end; ++points) { 7680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru fPath->lineTo(SkFloatToScalar(points->x), SkFloatToScalar(points->y)); 7780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 7880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru} 7980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 8080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Querustatic bool approximately_equal(float a, float b) { 8180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru const SkFloatingPoint<float, 10> lhs(a), rhs(b); 8280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return lhs.AlmostEquals(rhs); 8380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru} 8480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 8580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Querutypedef struct { 8680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru float x; 8780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru float y; 8880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru} Cubic[4], Quadratic[3]; 8980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 9080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Querustatic bool check_quadratic(const Cubic& cubic, Quadratic& reduction) { 9180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru float dx10 = cubic[1].x - cubic[0].x; 9280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru float dx23 = cubic[2].x - cubic[3].x; 9380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru float midX = cubic[0].x + dx10 * 3 / 2; 9480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru //NOTE: !approximately_equal(midX - cubic[3].x, dx23 * 3 / 2) 9580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru //does not work as subnormals get in between the left side and 0. 9680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru if (!approximately_equal(midX, (dx23 * 3 / 2) + cubic[3].x)) { 9780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return false; 9880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 9980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru float dy10 = cubic[1].y - cubic[0].y; 10080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru float dy23 = cubic[2].y - cubic[3].y; 10180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru float midY = cubic[0].y + dy10 * 3 / 2; 10280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru if (!approximately_equal(midY, (dy23 * 3 / 2) + cubic[3].y)) { 10380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return false; 10480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 10580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru reduction[0] = cubic[0]; 10680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru reduction[1].x = midX; 10780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru reduction[1].y = midY; 10880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru reduction[2] = cubic[3]; 10980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return true; 11080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru} 11180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 11280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queruvoid STDMETHODCALLTYPE SkDWriteGeometrySink::AddBeziers(const D2D1_BEZIER_SEGMENT *beziers, UINT beziersCount) { 11380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru SkPoint lastPt; 11480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru fPath->getLastPt(&lastPt); 11580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru D2D1_POINT_2F prevPt = { SkScalarToFloat(lastPt.fX), SkScalarToFloat(lastPt.fY) }; 11680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 11780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru for (const D2D1_BEZIER_SEGMENT *end = &beziers[beziersCount]; beziers < end; ++beziers) { 11880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru Cubic cubic = { { prevPt.x, prevPt.y }, 11980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru { beziers->point1.x, beziers->point1.y }, 12080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru { beziers->point2.x, beziers->point2.y }, 12180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru { beziers->point3.x, beziers->point3.y }, }; 12280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru Quadratic quadratic; 12380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru if (check_quadratic(cubic, quadratic)) { 12480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru fPath->quadTo(SkFloatToScalar(quadratic[1].x), SkFloatToScalar(quadratic[1].y), 12580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru SkFloatToScalar(quadratic[2].x), SkFloatToScalar(quadratic[2].y)); 12680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } else { 12780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru fPath->cubicTo(SkFloatToScalar(beziers->point1.x), SkFloatToScalar(beziers->point1.y), 12880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru SkFloatToScalar(beziers->point2.x), SkFloatToScalar(beziers->point2.y), 12980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru SkFloatToScalar(beziers->point3.x), SkFloatToScalar(beziers->point3.y)); 13080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 13180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru prevPt = beziers->point3; 13280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru } 13380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru} 13480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 13580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queruvoid STDMETHODCALLTYPE SkDWriteGeometrySink::EndFigure(D2D1_FIGURE_END figureEnd) { 13680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru fPath->close(); 13780bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru} 13880bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 13980bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste QueruHRESULT SkDWriteGeometrySink::Close() { 14080bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return S_OK; 14180bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru} 14280bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru 14380bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste QueruHRESULT SkDWriteGeometrySink::Create(SkPath* path, IDWriteGeometrySink** geometryToPath) { 14480bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru *geometryToPath = new SkDWriteGeometrySink(path); 14580bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru return S_OK; 14680bacfeb4bda06541e8695bd502229727bccfeaJean-Baptiste Queru} 147