| /* |
| * Copyright 2006 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "src/core/SkDraw.h" |
| |
| #include "include/core/SkBitmap.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkMatrix.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPathEffect.h" |
| #include "include/core/SkRRect.h" |
| #include "include/core/SkShader.h" |
| #include "include/core/SkString.h" |
| #include "include/core/SkStrokeRec.h" |
| #include "include/private/SkColorData.h" |
| #include "include/private/SkImageInfoPriv.h" |
| #include "include/private/SkMacros.h" |
| #include "include/private/SkTemplates.h" |
| #include "include/private/SkTo.h" |
| #include "src/core/SkArenaAlloc.h" |
| #include "src/core/SkAutoBlitterChoose.h" |
| #include "src/core/SkBlendModePriv.h" |
| #include "src/core/SkBlitter.h" |
| #include "src/core/SkDevice.h" |
| #include "src/core/SkDrawProcs.h" |
| #include "src/core/SkMaskFilterBase.h" |
| #include "src/core/SkMatrixUtils.h" |
| #include "src/core/SkPathEffectBase.h" |
| #include "src/core/SkPathPriv.h" |
| #include "src/core/SkRasterClip.h" |
| #include "src/core/SkRectPriv.h" |
| #include "src/core/SkSamplingPriv.h" |
| #include "src/core/SkScan.h" |
| #include "src/core/SkStroke.h" |
| #include "src/core/SkTLazy.h" |
| #include "src/core/SkUtils.h" |
| |
| #include <utility> |
| |
| static SkPaint make_paint_with_image(const SkPaint& origPaint, const SkBitmap& bitmap, |
| const SkSamplingOptions& sampling, |
| SkMatrix* matrix = nullptr) { |
| SkPaint paint(origPaint); |
| paint.setShader(SkMakeBitmapShaderForPaint(origPaint, bitmap, SkTileMode::kClamp, |
| SkTileMode::kClamp, sampling, matrix, |
| kNever_SkCopyPixelsMode)); |
| return paint; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkDraw::SkDraw() {} |
| |
| bool SkDraw::computeConservativeLocalClipBounds(SkRect* localBounds) const { |
| if (fRC->isEmpty()) { |
| return false; |
| } |
| |
| SkMatrix inverse; |
| if (!fMatrixProvider->localToDevice().invert(&inverse)) { |
| return false; |
| } |
| |
| SkIRect devBounds = fRC->getBounds(); |
| // outset to have slop for antialasing and hairlines |
| devBounds.outset(1, 1); |
| inverse.mapRect(localBounds, SkRect::Make(devBounds)); |
| return true; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void SkDraw::drawPaint(const SkPaint& paint) const { |
| SkDEBUGCODE(this->validate();) |
| |
| if (fRC->isEmpty()) { |
| return; |
| } |
| |
| SkIRect devRect; |
| devRect.setWH(fDst.width(), fDst.height()); |
| |
| SkAutoBlitterChoose blitter(*this, nullptr, paint); |
| SkScan::FillIRect(devRect, *fRC, blitter.get()); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| struct PtProcRec { |
| SkCanvas::PointMode fMode; |
| const SkPaint* fPaint; |
| const SkRegion* fClip; |
| const SkRasterClip* fRC; |
| |
| // computed values |
| SkRect fClipBounds; |
| SkScalar fRadius; |
| |
| typedef void (*Proc)(const PtProcRec&, const SkPoint devPts[], int count, |
| SkBlitter*); |
| |
| bool init(SkCanvas::PointMode, const SkPaint&, const SkMatrix* matrix, |
| const SkRasterClip*); |
| Proc chooseProc(SkBlitter** blitter); |
| |
| private: |
| SkAAClipBlitterWrapper fWrapper; |
| }; |
| |
| static void bw_pt_rect_hair_proc(const PtProcRec& rec, const SkPoint devPts[], |
| int count, SkBlitter* blitter) { |
| SkASSERT(rec.fClip->isRect()); |
| const SkIRect& r = rec.fClip->getBounds(); |
| |
| for (int i = 0; i < count; i++) { |
| int x = SkScalarFloorToInt(devPts[i].fX); |
| int y = SkScalarFloorToInt(devPts[i].fY); |
| if (r.contains(x, y)) { |
| blitter->blitH(x, y, 1); |
| } |
| } |
| } |
| |
| static void bw_pt_rect_16_hair_proc(const PtProcRec& rec, |
| const SkPoint devPts[], int count, |
| SkBlitter* blitter) { |
| SkASSERT(rec.fRC->isRect()); |
| const SkIRect& r = rec.fRC->getBounds(); |
| uint32_t value; |
| const SkPixmap* dst = blitter->justAnOpaqueColor(&value); |
| SkASSERT(dst); |
| |
| uint16_t* addr = dst->writable_addr16(0, 0); |
| size_t rb = dst->rowBytes(); |
| |
| for (int i = 0; i < count; i++) { |
| int x = SkScalarFloorToInt(devPts[i].fX); |
| int y = SkScalarFloorToInt(devPts[i].fY); |
| if (r.contains(x, y)) { |
| ((uint16_t*)((char*)addr + y * rb))[x] = SkToU16(value); |
| } |
| } |
| } |
| |
| static void bw_pt_rect_32_hair_proc(const PtProcRec& rec, |
| const SkPoint devPts[], int count, |
| SkBlitter* blitter) { |
| SkASSERT(rec.fRC->isRect()); |
| const SkIRect& r = rec.fRC->getBounds(); |
| uint32_t value; |
| const SkPixmap* dst = blitter->justAnOpaqueColor(&value); |
| SkASSERT(dst); |
| |
| SkPMColor* addr = dst->writable_addr32(0, 0); |
| size_t rb = dst->rowBytes(); |
| |
| for (int i = 0; i < count; i++) { |
| int x = SkScalarFloorToInt(devPts[i].fX); |
| int y = SkScalarFloorToInt(devPts[i].fY); |
| if (r.contains(x, y)) { |
| ((SkPMColor*)((char*)addr + y * rb))[x] = value; |
| } |
| } |
| } |
| |
| static void bw_pt_hair_proc(const PtProcRec& rec, const SkPoint devPts[], |
| int count, SkBlitter* blitter) { |
| for (int i = 0; i < count; i++) { |
| int x = SkScalarFloorToInt(devPts[i].fX); |
| int y = SkScalarFloorToInt(devPts[i].fY); |
| if (rec.fClip->contains(x, y)) { |
| blitter->blitH(x, y, 1); |
| } |
| } |
| } |
| |
| static void bw_line_hair_proc(const PtProcRec& rec, const SkPoint devPts[], |
| int count, SkBlitter* blitter) { |
| for (int i = 0; i < count; i += 2) { |
| SkScan::HairLine(&devPts[i], 2, *rec.fRC, blitter); |
| } |
| } |
| |
| static void bw_poly_hair_proc(const PtProcRec& rec, const SkPoint devPts[], |
| int count, SkBlitter* blitter) { |
| SkScan::HairLine(devPts, count, *rec.fRC, blitter); |
| } |
| |
| // aa versions |
| |
| static void aa_line_hair_proc(const PtProcRec& rec, const SkPoint devPts[], |
| int count, SkBlitter* blitter) { |
| for (int i = 0; i < count; i += 2) { |
| SkScan::AntiHairLine(&devPts[i], 2, *rec.fRC, blitter); |
| } |
| } |
| |
| static void aa_poly_hair_proc(const PtProcRec& rec, const SkPoint devPts[], |
| int count, SkBlitter* blitter) { |
| SkScan::AntiHairLine(devPts, count, *rec.fRC, blitter); |
| } |
| |
| // square procs (strokeWidth > 0 but matrix is square-scale (sx == sy) |
| |
| static SkRect make_square_rad(SkPoint center, SkScalar radius) { |
| return { |
| center.fX - radius, center.fY - radius, |
| center.fX + radius, center.fY + radius |
| }; |
| } |
| |
| static SkXRect make_xrect(const SkRect& r) { |
| SkASSERT(SkRectPriv::FitsInFixed(r)); |
| return { |
| SkScalarToFixed(r.fLeft), SkScalarToFixed(r.fTop), |
| SkScalarToFixed(r.fRight), SkScalarToFixed(r.fBottom) |
| }; |
| } |
| |
| static void bw_square_proc(const PtProcRec& rec, const SkPoint devPts[], |
| int count, SkBlitter* blitter) { |
| for (int i = 0; i < count; i++) { |
| SkRect r = make_square_rad(devPts[i], rec.fRadius); |
| if (r.intersect(rec.fClipBounds)) { |
| SkScan::FillXRect(make_xrect(r), *rec.fRC, blitter); |
| } |
| } |
| } |
| |
| static void aa_square_proc(const PtProcRec& rec, const SkPoint devPts[], |
| int count, SkBlitter* blitter) { |
| for (int i = 0; i < count; i++) { |
| SkRect r = make_square_rad(devPts[i], rec.fRadius); |
| if (r.intersect(rec.fClipBounds)) { |
| SkScan::AntiFillXRect(make_xrect(r), *rec.fRC, blitter); |
| } |
| } |
| } |
| |
| // If this returns true, then chooseProc() must return a valid proc |
| bool PtProcRec::init(SkCanvas::PointMode mode, const SkPaint& paint, |
| const SkMatrix* matrix, const SkRasterClip* rc) { |
| if ((unsigned)mode > (unsigned)SkCanvas::kPolygon_PointMode) { |
| return false; |
| } |
| if (paint.getPathEffect() || paint.getMaskFilter()) { |
| return false; |
| } |
| SkScalar width = paint.getStrokeWidth(); |
| SkScalar radius = -1; // sentinel value, a "valid" value must be > 0 |
| |
| if (0 == width) { |
| radius = 0.5f; |
| } else if (paint.getStrokeCap() != SkPaint::kRound_Cap && |
| matrix->isScaleTranslate() && SkCanvas::kPoints_PointMode == mode) { |
| SkScalar sx = matrix->get(SkMatrix::kMScaleX); |
| SkScalar sy = matrix->get(SkMatrix::kMScaleY); |
| if (SkScalarNearlyZero(sx - sy)) { |
| radius = SkScalarHalf(width * SkScalarAbs(sx)); |
| } |
| } |
| if (radius > 0) { |
| SkRect clipBounds = SkRect::Make(rc->getBounds()); |
| // if we return true, the caller may assume that the constructed shapes can be represented |
| // using SkFixed (after clipping), so we preflight that here. |
| if (!SkRectPriv::FitsInFixed(clipBounds)) { |
| return false; |
| } |
| fMode = mode; |
| fPaint = &paint; |
| fClip = nullptr; |
| fRC = rc; |
| fClipBounds = clipBounds; |
| fRadius = radius; |
| return true; |
| } |
| return false; |
| } |
| |
| PtProcRec::Proc PtProcRec::chooseProc(SkBlitter** blitterPtr) { |
| Proc proc = nullptr; |
| |
| SkBlitter* blitter = *blitterPtr; |
| if (fRC->isBW()) { |
| fClip = &fRC->bwRgn(); |
| } else { |
| fWrapper.init(*fRC, blitter); |
| fClip = &fWrapper.getRgn(); |
| blitter = fWrapper.getBlitter(); |
| *blitterPtr = blitter; |
| } |
| |
| // for our arrays |
| SkASSERT(0 == SkCanvas::kPoints_PointMode); |
| SkASSERT(1 == SkCanvas::kLines_PointMode); |
| SkASSERT(2 == SkCanvas::kPolygon_PointMode); |
| SkASSERT((unsigned)fMode <= (unsigned)SkCanvas::kPolygon_PointMode); |
| |
| if (fPaint->isAntiAlias()) { |
| if (0 == fPaint->getStrokeWidth()) { |
| static const Proc gAAProcs[] = { |
| aa_square_proc, aa_line_hair_proc, aa_poly_hair_proc |
| }; |
| proc = gAAProcs[fMode]; |
| } else if (fPaint->getStrokeCap() != SkPaint::kRound_Cap) { |
| SkASSERT(SkCanvas::kPoints_PointMode == fMode); |
| proc = aa_square_proc; |
| } |
| } else { // BW |
| if (fRadius <= 0.5f) { // small radii and hairline |
| if (SkCanvas::kPoints_PointMode == fMode && fClip->isRect()) { |
| uint32_t value; |
| const SkPixmap* bm = blitter->justAnOpaqueColor(&value); |
| if (bm && kRGB_565_SkColorType == bm->colorType()) { |
| proc = bw_pt_rect_16_hair_proc; |
| } else if (bm && kN32_SkColorType == bm->colorType()) { |
| proc = bw_pt_rect_32_hair_proc; |
| } else { |
| proc = bw_pt_rect_hair_proc; |
| } |
| } else { |
| static Proc gBWProcs[] = { |
| bw_pt_hair_proc, bw_line_hair_proc, bw_poly_hair_proc |
| }; |
| proc = gBWProcs[fMode]; |
| } |
| } else { |
| proc = bw_square_proc; |
| } |
| } |
| return proc; |
| } |
| |
| // each of these costs 8-bytes of stack space, so don't make it too large |
| // must be even for lines/polygon to work |
| #define MAX_DEV_PTS 32 |
| |
| void SkDraw::drawPoints(SkCanvas::PointMode mode, size_t count, |
| const SkPoint pts[], const SkPaint& paint, |
| SkBaseDevice* device) const { |
| // if we're in lines mode, force count to be even |
| if (SkCanvas::kLines_PointMode == mode) { |
| count &= ~(size_t)1; |
| } |
| |
| if ((long)count <= 0) { |
| return; |
| } |
| |
| SkASSERT(pts != nullptr); |
| SkDEBUGCODE(this->validate();) |
| |
| // nothing to draw |
| if (fRC->isEmpty()) { |
| return; |
| } |
| |
| if (!SkScalarsAreFinite(&pts[0].fX, count * 2)) { |
| return; |
| } |
| |
| SkMatrix ctm = fMatrixProvider->localToDevice(); |
| PtProcRec rec; |
| if (!device && rec.init(mode, paint, &ctm, fRC)) { |
| SkAutoBlitterChoose blitter(*this, nullptr, paint); |
| |
| SkPoint devPts[MAX_DEV_PTS]; |
| SkBlitter* bltr = blitter.get(); |
| PtProcRec::Proc proc = rec.chooseProc(&bltr); |
| // we have to back up subsequent passes if we're in polygon mode |
| const size_t backup = (SkCanvas::kPolygon_PointMode == mode); |
| |
| do { |
| int n = SkToInt(count); |
| if (n > MAX_DEV_PTS) { |
| n = MAX_DEV_PTS; |
| } |
| ctm.mapPoints(devPts, pts, n); |
| if (!SkScalarsAreFinite(&devPts[0].fX, n * 2)) { |
| return; |
| } |
| proc(rec, devPts, n, bltr); |
| pts += n - backup; |
| SkASSERT(SkToInt(count) >= n); |
| count -= n; |
| if (count > 0) { |
| count += backup; |
| } |
| } while (count != 0); |
| } else { |
| switch (mode) { |
| case SkCanvas::kPoints_PointMode: { |
| // temporarily mark the paint as filling. |
| SkPaint newPaint(paint); |
| newPaint.setStyle(SkPaint::kFill_Style); |
| |
| SkScalar width = newPaint.getStrokeWidth(); |
| SkScalar radius = SkScalarHalf(width); |
| |
| if (newPaint.getStrokeCap() == SkPaint::kRound_Cap) { |
| if (device) { |
| for (size_t i = 0; i < count; ++i) { |
| SkRect r = SkRect::MakeLTRB(pts[i].fX - radius, pts[i].fY - radius, |
| pts[i].fX + radius, pts[i].fY + radius); |
| device->drawOval(r, newPaint); |
| } |
| } else { |
| SkPath path; |
| SkMatrix preMatrix; |
| |
| path.addCircle(0, 0, radius); |
| for (size_t i = 0; i < count; i++) { |
| preMatrix.setTranslate(pts[i].fX, pts[i].fY); |
| // pass true for the last point, since we can modify |
| // then path then |
| path.setIsVolatile((count-1) == i); |
| this->drawPath(path, newPaint, &preMatrix, (count-1) == i); |
| } |
| } |
| } else { |
| SkRect r; |
| |
| for (size_t i = 0; i < count; i++) { |
| r.fLeft = pts[i].fX - radius; |
| r.fTop = pts[i].fY - radius; |
| r.fRight = r.fLeft + width; |
| r.fBottom = r.fTop + width; |
| if (device) { |
| device->drawRect(r, newPaint); |
| } else { |
| this->drawRect(r, newPaint); |
| } |
| } |
| } |
| break; |
| } |
| case SkCanvas::kLines_PointMode: |
| if (2 == count && paint.getPathEffect()) { |
| // most likely a dashed line - see if it is one of the ones |
| // we can accelerate |
| SkStrokeRec stroke(paint); |
| SkPathEffectBase::PointData pointData; |
| |
| SkPath path = SkPath::Line(pts[0], pts[1]); |
| |
| SkRect cullRect = SkRect::Make(fRC->getBounds()); |
| |
| if (as_PEB(paint.getPathEffect())->asPoints(&pointData, path, stroke, ctm, |
| &cullRect)) { |
| // 'asPoints' managed to find some fast path |
| |
| SkPaint newP(paint); |
| newP.setPathEffect(nullptr); |
| newP.setStyle(SkPaint::kFill_Style); |
| |
| if (!pointData.fFirst.isEmpty()) { |
| if (device) { |
| device->drawPath(pointData.fFirst, newP); |
| } else { |
| this->drawPath(pointData.fFirst, newP); |
| } |
| } |
| |
| if (!pointData.fLast.isEmpty()) { |
| if (device) { |
| device->drawPath(pointData.fLast, newP); |
| } else { |
| this->drawPath(pointData.fLast, newP); |
| } |
| } |
| |
| if (pointData.fSize.fX == pointData.fSize.fY) { |
| // The rest of the dashed line can just be drawn as points |
| SkASSERT(pointData.fSize.fX == SkScalarHalf(newP.getStrokeWidth())); |
| |
| if (SkPathEffectBase::PointData::kCircles_PointFlag & pointData.fFlags) { |
| newP.setStrokeCap(SkPaint::kRound_Cap); |
| } else { |
| newP.setStrokeCap(SkPaint::kButt_Cap); |
| } |
| |
| if (device) { |
| device->drawPoints(SkCanvas::kPoints_PointMode, |
| pointData.fNumPoints, |
| pointData.fPoints, |
| newP); |
| } else { |
| this->drawPoints(SkCanvas::kPoints_PointMode, |
| pointData.fNumPoints, |
| pointData.fPoints, |
| newP, |
| device); |
| } |
| break; |
| } else { |
| // The rest of the dashed line must be drawn as rects |
| SkASSERT(!(SkPathEffectBase::PointData::kCircles_PointFlag & |
| pointData.fFlags)); |
| |
| SkRect r; |
| |
| for (int i = 0; i < pointData.fNumPoints; ++i) { |
| r.setLTRB(pointData.fPoints[i].fX - pointData.fSize.fX, |
| pointData.fPoints[i].fY - pointData.fSize.fY, |
| pointData.fPoints[i].fX + pointData.fSize.fX, |
| pointData.fPoints[i].fY + pointData.fSize.fY); |
| if (device) { |
| device->drawRect(r, newP); |
| } else { |
| this->drawRect(r, newP); |
| } |
| } |
| } |
| |
| break; |
| } |
| } |
| [[fallthrough]]; // couldn't take fast path |
| case SkCanvas::kPolygon_PointMode: { |
| count -= 1; |
| SkPath path; |
| SkPaint p(paint); |
| p.setStyle(SkPaint::kStroke_Style); |
| size_t inc = (SkCanvas::kLines_PointMode == mode) ? 2 : 1; |
| path.setIsVolatile(true); |
| for (size_t i = 0; i < count; i += inc) { |
| path.moveTo(pts[i]); |
| path.lineTo(pts[i+1]); |
| if (device) { |
| device->drawPath(path, p, true); |
| } else { |
| this->drawPath(path, p, nullptr, true); |
| } |
| path.rewind(); |
| } |
| break; |
| } |
| } |
| } |
| } |
| |
| static inline SkPoint compute_stroke_size(const SkPaint& paint, const SkMatrix& matrix) { |
| SkASSERT(matrix.rectStaysRect()); |
| SkASSERT(SkPaint::kFill_Style != paint.getStyle()); |
| |
| SkVector size; |
| SkPoint pt = { paint.getStrokeWidth(), paint.getStrokeWidth() }; |
| matrix.mapVectors(&size, &pt, 1); |
| return SkPoint::Make(SkScalarAbs(size.fX), SkScalarAbs(size.fY)); |
| } |
| |
| static bool easy_rect_join(const SkRect& rect, const SkPaint& paint, const SkMatrix& matrix, |
| SkPoint* strokeSize) { |
| if (rect.isEmpty() || SkPaint::kMiter_Join != paint.getStrokeJoin() || |
| paint.getStrokeMiter() < SK_ScalarSqrt2) { |
| return false; |
| } |
| |
| *strokeSize = compute_stroke_size(paint, matrix); |
| return true; |
| } |
| |
| SkDraw::RectType SkDraw::ComputeRectType(const SkRect& rect, |
| const SkPaint& paint, |
| const SkMatrix& matrix, |
| SkPoint* strokeSize) { |
| RectType rtype; |
| const SkScalar width = paint.getStrokeWidth(); |
| const bool zeroWidth = (0 == width); |
| SkPaint::Style style = paint.getStyle(); |
| |
| if ((SkPaint::kStrokeAndFill_Style == style) && zeroWidth) { |
| style = SkPaint::kFill_Style; |
| } |
| |
| if (paint.getPathEffect() || paint.getMaskFilter() || |
| !matrix.rectStaysRect() || SkPaint::kStrokeAndFill_Style == style) { |
| rtype = kPath_RectType; |
| } else if (SkPaint::kFill_Style == style) { |
| rtype = kFill_RectType; |
| } else if (zeroWidth) { |
| rtype = kHair_RectType; |
| } else if (easy_rect_join(rect, paint, matrix, strokeSize)) { |
| rtype = kStroke_RectType; |
| } else { |
| rtype = kPath_RectType; |
| } |
| return rtype; |
| } |
| |
| static const SkPoint* rect_points(const SkRect& r) { |
| return reinterpret_cast<const SkPoint*>(&r); |
| } |
| |
| static SkPoint* rect_points(SkRect& r) { |
| return reinterpret_cast<SkPoint*>(&r); |
| } |
| |
| static void draw_rect_as_path(const SkDraw& orig, const SkRect& prePaintRect, |
| const SkPaint& paint, const SkMatrixProvider* matrixProvider) { |
| SkDraw draw(orig); |
| draw.fMatrixProvider = matrixProvider; |
| SkPath tmp; |
| tmp.addRect(prePaintRect); |
| tmp.setFillType(SkPathFillType::kWinding); |
| draw.drawPath(tmp, paint, nullptr, true); |
| } |
| |
| void SkDraw::drawRect(const SkRect& prePaintRect, const SkPaint& paint, |
| const SkMatrix* paintMatrix, const SkRect* postPaintRect) const { |
| SkDEBUGCODE(this->validate();) |
| |
| // nothing to draw |
| if (fRC->isEmpty()) { |
| return; |
| } |
| |
| const SkMatrixProvider* matrixProvider = fMatrixProvider; |
| SkTLazy<SkPreConcatMatrixProvider> preConcatMatrixProvider; |
| if (paintMatrix) { |
| SkASSERT(postPaintRect); |
| matrixProvider = preConcatMatrixProvider.init(*matrixProvider, *paintMatrix); |
| } else { |
| SkASSERT(!postPaintRect); |
| } |
| |
| SkMatrix ctm = fMatrixProvider->localToDevice(); |
| SkPoint strokeSize; |
| RectType rtype = ComputeRectType(prePaintRect, paint, ctm, &strokeSize); |
| |
| if (kPath_RectType == rtype) { |
| draw_rect_as_path(*this, prePaintRect, paint, matrixProvider); |
| return; |
| } |
| |
| SkRect devRect; |
| const SkRect& paintRect = paintMatrix ? *postPaintRect : prePaintRect; |
| // skip the paintMatrix when transforming the rect by the CTM |
| ctm.mapPoints(rect_points(devRect), rect_points(paintRect), 2); |
| devRect.sort(); |
| |
| // look for the quick exit, before we build a blitter |
| SkRect bbox = devRect; |
| if (paint.getStyle() != SkPaint::kFill_Style) { |
| // extra space for hairlines |
| if (paint.getStrokeWidth() == 0) { |
| bbox.outset(1, 1); |
| } else { |
| // For kStroke_RectType, strokeSize is already computed. |
| const SkPoint& ssize = (kStroke_RectType == rtype) |
| ? strokeSize |
| : compute_stroke_size(paint, ctm); |
| bbox.outset(SkScalarHalf(ssize.x()), SkScalarHalf(ssize.y())); |
| } |
| } |
| if (SkPathPriv::TooBigForMath(bbox)) { |
| return; |
| } |
| |
| if (!SkRectPriv::FitsInFixed(bbox) && rtype != kHair_RectType) { |
| draw_rect_as_path(*this, prePaintRect, paint, matrixProvider); |
| return; |
| } |
| |
| SkIRect ir = bbox.roundOut(); |
| if (fRC->quickReject(ir)) { |
| return; |
| } |
| |
| SkAutoBlitterChoose blitterStorage(*this, matrixProvider, paint); |
| const SkRasterClip& clip = *fRC; |
| SkBlitter* blitter = blitterStorage.get(); |
| |
| // we want to "fill" if we are kFill or kStrokeAndFill, since in the latter |
| // case we are also hairline (if we've gotten to here), which devolves to |
| // effectively just kFill |
| switch (rtype) { |
| case kFill_RectType: |
| if (paint.isAntiAlias()) { |
| SkScan::AntiFillRect(devRect, clip, blitter); |
| } else { |
| SkScan::FillRect(devRect, clip, blitter); |
| } |
| break; |
| case kStroke_RectType: |
| if (paint.isAntiAlias()) { |
| SkScan::AntiFrameRect(devRect, strokeSize, clip, blitter); |
| } else { |
| SkScan::FrameRect(devRect, strokeSize, clip, blitter); |
| } |
| break; |
| case kHair_RectType: |
| if (paint.isAntiAlias()) { |
| SkScan::AntiHairRect(devRect, clip, blitter); |
| } else { |
| SkScan::HairRect(devRect, clip, blitter); |
| } |
| break; |
| default: |
| SkDEBUGFAIL("bad rtype"); |
| } |
| } |
| |
| #if defined(SK_SUPPORT_LEGACY_ALPHA_BITMAP_AS_COVERAGE) |
| void SkDraw::drawDevMask(const SkMask& srcM, const SkPaint& paint) const { |
| if (srcM.fBounds.isEmpty()) { |
| return; |
| } |
| |
| const SkMask* mask = &srcM; |
| |
| SkMask dstM; |
| if (paint.getMaskFilter() && |
| as_MFB(paint.getMaskFilter()) |
| ->filterMask(&dstM, srcM, fMatrixProvider->localToDevice(), nullptr)) { |
| mask = &dstM; |
| } |
| SkAutoMaskFreeImage ami(dstM.fImage); |
| |
| SkAutoBlitterChoose blitterChooser(*this, nullptr, paint); |
| SkBlitter* blitter = blitterChooser.get(); |
| |
| SkAAClipBlitterWrapper wrapper; |
| const SkRegion* clipRgn; |
| |
| if (fRC->isBW()) { |
| clipRgn = &fRC->bwRgn(); |
| } else { |
| wrapper.init(*fRC, blitter); |
| clipRgn = &wrapper.getRgn(); |
| blitter = wrapper.getBlitter(); |
| } |
| blitter->blitMaskRegion(*mask, *clipRgn); |
| } |
| #endif |
| |
| static SkScalar fast_len(const SkVector& vec) { |
| SkScalar x = SkScalarAbs(vec.fX); |
| SkScalar y = SkScalarAbs(vec.fY); |
| if (x < y) { |
| using std::swap; |
| swap(x, y); |
| } |
| return x + SkScalarHalf(y); |
| } |
| |
| bool SkDrawTreatAAStrokeAsHairline(SkScalar strokeWidth, const SkMatrix& matrix, |
| SkScalar* coverage) { |
| SkASSERT(strokeWidth > 0); |
| // We need to try to fake a thick-stroke with a modulated hairline. |
| |
| if (matrix.hasPerspective()) { |
| return false; |
| } |
| |
| SkVector src[2], dst[2]; |
| src[0].set(strokeWidth, 0); |
| src[1].set(0, strokeWidth); |
| matrix.mapVectors(dst, src, 2); |
| SkScalar len0 = fast_len(dst[0]); |
| SkScalar len1 = fast_len(dst[1]); |
| if (len0 <= SK_Scalar1 && len1 <= SK_Scalar1) { |
| if (coverage) { |
| *coverage = SkScalarAve(len0, len1); |
| } |
| return true; |
| } |
| return false; |
| } |
| |
| void SkDraw::drawRRect(const SkRRect& rrect, const SkPaint& paint) const { |
| SkDEBUGCODE(this->validate()); |
| |
| if (fRC->isEmpty()) { |
| return; |
| } |
| |
| SkMatrix ctm = fMatrixProvider->localToDevice(); |
| { |
| // TODO: Investigate optimizing these options. They are in the same |
| // order as SkDraw::drawPath, which handles each case. It may be |
| // that there is no way to optimize for these using the SkRRect path. |
| SkScalar coverage; |
| if (SkDrawTreatAsHairline(paint, ctm, &coverage)) { |
| goto DRAW_PATH; |
| } |
| |
| if (paint.getPathEffect() || paint.getStyle() != SkPaint::kFill_Style) { |
| goto DRAW_PATH; |
| } |
| } |
| |
| if (paint.getMaskFilter()) { |
| // Transform the rrect into device space. |
| SkRRect devRRect; |
| if (rrect.transform(ctm, &devRRect)) { |
| SkAutoBlitterChoose blitter(*this, nullptr, paint); |
| if (as_MFB(paint.getMaskFilter())->filterRRect(devRRect, ctm, *fRC, blitter.get())) { |
| return; // filterRRect() called the blitter, so we're done |
| } |
| } |
| } |
| |
| DRAW_PATH: |
| // Now fall back to the default case of using a path. |
| SkPath path; |
| path.addRRect(rrect); |
| this->drawPath(path, paint, nullptr, true); |
| } |
| |
| void SkDraw::drawDevPath(const SkPath& devPath, const SkPaint& paint, bool drawCoverage, |
| SkBlitter* customBlitter, bool doFill) const { |
| if (SkPathPriv::TooBigForMath(devPath)) { |
| return; |
| } |
| SkBlitter* blitter = nullptr; |
| SkAutoBlitterChoose blitterStorage; |
| if (nullptr == customBlitter) { |
| blitter = blitterStorage.choose(*this, nullptr, paint, drawCoverage); |
| } else { |
| blitter = customBlitter; |
| } |
| |
| if (paint.getMaskFilter()) { |
| SkStrokeRec::InitStyle style = doFill ? SkStrokeRec::kFill_InitStyle |
| : SkStrokeRec::kHairline_InitStyle; |
| if (as_MFB(paint.getMaskFilter()) |
| ->filterPath(devPath, fMatrixProvider->localToDevice(), *fRC, blitter, style)) { |
| return; // filterPath() called the blitter, so we're done |
| } |
| } |
| |
| void (*proc)(const SkPath&, const SkRasterClip&, SkBlitter*); |
| if (doFill) { |
| if (paint.isAntiAlias()) { |
| proc = SkScan::AntiFillPath; |
| } else { |
| proc = SkScan::FillPath; |
| } |
| } else { // hairline |
| if (paint.isAntiAlias()) { |
| switch (paint.getStrokeCap()) { |
| case SkPaint::kButt_Cap: |
| proc = SkScan::AntiHairPath; |
| break; |
| case SkPaint::kSquare_Cap: |
| proc = SkScan::AntiHairSquarePath; |
| break; |
| case SkPaint::kRound_Cap: |
| proc = SkScan::AntiHairRoundPath; |
| break; |
| } |
| } else { |
| switch (paint.getStrokeCap()) { |
| case SkPaint::kButt_Cap: |
| proc = SkScan::HairPath; |
| break; |
| case SkPaint::kSquare_Cap: |
| proc = SkScan::HairSquarePath; |
| break; |
| case SkPaint::kRound_Cap: |
| proc = SkScan::HairRoundPath; |
| break; |
| } |
| } |
| } |
| |
| proc(devPath, *fRC, blitter); |
| } |
| |
| void SkDraw::drawPath(const SkPath& origSrcPath, const SkPaint& origPaint, |
| const SkMatrix* prePathMatrix, bool pathIsMutable, |
| bool drawCoverage, SkBlitter* customBlitter) const { |
| SkDEBUGCODE(this->validate();) |
| |
| // nothing to draw |
| if (fRC->isEmpty()) { |
| return; |
| } |
| |
| SkPath* pathPtr = (SkPath*)&origSrcPath; |
| bool doFill = true; |
| SkPath tmpPathStorage; |
| SkPath* tmpPath = &tmpPathStorage; |
| const SkMatrixProvider* matrixProvider = fMatrixProvider; |
| SkTLazy<SkPreConcatMatrixProvider> preConcatMatrixProvider; |
| tmpPath->setIsVolatile(true); |
| |
| if (prePathMatrix) { |
| if (origPaint.getPathEffect() || origPaint.getStyle() != SkPaint::kFill_Style) { |
| SkPath* result = pathPtr; |
| |
| if (!pathIsMutable) { |
| result = tmpPath; |
| pathIsMutable = true; |
| } |
| pathPtr->transform(*prePathMatrix, result); |
| pathPtr = result; |
| } else { |
| matrixProvider = preConcatMatrixProvider.init(*matrixProvider, *prePathMatrix); |
| } |
| } |
| |
| SkTCopyOnFirstWrite<SkPaint> paint(origPaint); |
| |
| { |
| SkScalar coverage; |
| if (SkDrawTreatAsHairline(origPaint, matrixProvider->localToDevice(), &coverage)) { |
| const auto bm = origPaint.asBlendMode(); |
| if (SK_Scalar1 == coverage) { |
| paint.writable()->setStrokeWidth(0); |
| } else if (bm && SkBlendMode_SupportsCoverageAsAlpha(bm.value())) { |
| U8CPU newAlpha; |
| #if 0 |
| newAlpha = SkToU8(SkScalarRoundToInt(coverage * |
| origPaint.getAlpha())); |
| #else |
| // this is the old technique, which we preserve for now so |
| // we don't change previous results (testing) |
| // the new way seems fine, its just (a tiny bit) different |
| int scale = (int)(coverage * 256); |
| newAlpha = origPaint.getAlpha() * scale >> 8; |
| #endif |
| SkPaint* writablePaint = paint.writable(); |
| writablePaint->setStrokeWidth(0); |
| writablePaint->setAlpha(newAlpha); |
| } |
| } |
| } |
| |
| if (paint->getPathEffect() || paint->getStyle() != SkPaint::kFill_Style) { |
| SkRect cullRect; |
| const SkRect* cullRectPtr = nullptr; |
| if (this->computeConservativeLocalClipBounds(&cullRect)) { |
| cullRectPtr = &cullRect; |
| } |
| doFill = paint->getFillPath(*pathPtr, tmpPath, cullRectPtr, |
| fMatrixProvider->localToDevice()); |
| pathPtr = tmpPath; |
| } |
| |
| // avoid possibly allocating a new path in transform if we can |
| SkPath* devPathPtr = pathIsMutable ? pathPtr : tmpPath; |
| |
| // transform the path into device space |
| pathPtr->transform(matrixProvider->localToDevice(), devPathPtr); |
| |
| #if defined(SK_BUILD_FOR_FUZZER) |
| if (devPathPtr->countPoints() > 1000) { |
| return; |
| } |
| #endif |
| |
| this->drawDevPath(*devPathPtr, *paint, drawCoverage, customBlitter, doFill); |
| } |
| |
| #if defined(SK_SUPPORT_LEGACY_ALPHA_BITMAP_AS_COVERAGE) |
| void SkDraw::drawBitmapAsMask(const SkBitmap& bitmap, const SkSamplingOptions& sampling, |
| const SkPaint& paint) const { |
| SkASSERT(bitmap.colorType() == kAlpha_8_SkColorType); |
| |
| // nothing to draw |
| if (fRC->isEmpty()) { |
| return; |
| } |
| |
| SkMatrix ctm = fMatrixProvider->localToDevice(); |
| if (SkTreatAsSprite(ctm, bitmap.dimensions(), sampling, paint)) |
| { |
| int ix = SkScalarRoundToInt(ctm.getTranslateX()); |
| int iy = SkScalarRoundToInt(ctm.getTranslateY()); |
| |
| SkPixmap pmap; |
| if (!bitmap.peekPixels(&pmap)) { |
| return; |
| } |
| SkMask mask; |
| mask.fBounds.setXYWH(ix, iy, pmap.width(), pmap.height()); |
| mask.fFormat = SkMask::kA8_Format; |
| mask.fRowBytes = SkToU32(pmap.rowBytes()); |
| // fImage is typed as writable, but in this case it is used read-only |
| mask.fImage = (uint8_t*)pmap.addr8(0, 0); |
| |
| this->drawDevMask(mask, paint); |
| } else { // need to xform the bitmap first |
| SkRect r; |
| SkMask mask; |
| |
| r.setIWH(bitmap.width(), bitmap.height()); |
| ctm.mapRect(&r); |
| r.round(&mask.fBounds); |
| |
| // set the mask's bounds to the transformed bitmap-bounds, |
| // clipped to the actual device and further limited by the clip bounds |
| { |
| SkASSERT(fDst.bounds().contains(fRC->getBounds())); |
| SkIRect devBounds = fDst.bounds(); |
| devBounds.intersect(fRC->getBounds().makeOutset(1, 1)); |
| // need intersect(l, t, r, b) on irect |
| if (!mask.fBounds.intersect(devBounds)) { |
| return; |
| } |
| } |
| |
| mask.fFormat = SkMask::kA8_Format; |
| mask.fRowBytes = SkAlign4(mask.fBounds.width()); |
| size_t size = mask.computeImageSize(); |
| if (0 == size) { |
| // the mask is too big to allocated, draw nothing |
| return; |
| } |
| |
| // allocate (and clear) our temp buffer to hold the transformed bitmap |
| SkAutoTMalloc<uint8_t> storage(size); |
| mask.fImage = storage.get(); |
| memset(mask.fImage, 0, size); |
| |
| // now draw our bitmap(src) into mask(dst), transformed by the matrix |
| { |
| SkBitmap device; |
| device.installPixels(SkImageInfo::MakeA8(mask.fBounds.width(), mask.fBounds.height()), |
| mask.fImage, mask.fRowBytes); |
| |
| SkCanvas c(device); |
| // need the unclipped top/left for the translate |
| c.translate(-SkIntToScalar(mask.fBounds.fLeft), |
| -SkIntToScalar(mask.fBounds.fTop)); |
| c.concat(ctm); |
| |
| // We can't call drawBitmap, or we'll infinitely recurse. Instead |
| // we manually build a shader and draw that into our new mask |
| SkPaint tmpPaint; |
| tmpPaint.setAntiAlias(paint.isAntiAlias()); |
| tmpPaint.setDither(paint.isDither()); |
| SkPaint paintWithShader = make_paint_with_image(tmpPaint, bitmap, sampling); |
| SkRect rr; |
| rr.setIWH(bitmap.width(), bitmap.height()); |
| c.drawRect(rr, paintWithShader); |
| } |
| this->drawDevMask(mask, paint); |
| } |
| } |
| #endif |
| |
| static bool clipped_out(const SkMatrix& m, const SkRasterClip& c, |
| const SkRect& srcR) { |
| SkRect dstR; |
| m.mapRect(&dstR, srcR); |
| return c.quickReject(dstR.roundOut()); |
| } |
| |
| static bool clipped_out(const SkMatrix& matrix, const SkRasterClip& clip, |
| int width, int height) { |
| SkRect r; |
| r.setIWH(width, height); |
| return clipped_out(matrix, clip, r); |
| } |
| |
| static bool clipHandlesSprite(const SkRasterClip& clip, int x, int y, const SkPixmap& pmap) { |
| return clip.isBW() || clip.quickContains(SkIRect::MakeXYWH(x, y, pmap.width(), pmap.height())); |
| } |
| |
| void SkDraw::drawBitmap(const SkBitmap& bitmap, const SkMatrix& prematrix, |
| const SkRect* dstBounds, const SkSamplingOptions& sampling, |
| const SkPaint& origPaint) const { |
| SkDEBUGCODE(this->validate();) |
| |
| // nothing to draw |
| if (fRC->isEmpty() || |
| bitmap.width() == 0 || bitmap.height() == 0 || |
| bitmap.colorType() == kUnknown_SkColorType) { |
| return; |
| } |
| |
| SkTCopyOnFirstWrite<SkPaint> paint(origPaint); |
| if (origPaint.getStyle() != SkPaint::kFill_Style) { |
| paint.writable()->setStyle(SkPaint::kFill_Style); |
| } |
| |
| SkPreConcatMatrixProvider matrixProvider(*fMatrixProvider, prematrix); |
| SkMatrix matrix = matrixProvider.localToDevice(); |
| |
| if (clipped_out(matrix, *fRC, bitmap.width(), bitmap.height())) { |
| return; |
| } |
| |
| if (!SkColorTypeIsAlphaOnly(bitmap.colorType()) && |
| SkTreatAsSprite(matrix, bitmap.dimensions(), sampling, *paint)) { |
| // |
| // It is safe to call lock pixels now, since we know the matrix is |
| // (more or less) identity. |
| // |
| SkPixmap pmap; |
| if (!bitmap.peekPixels(&pmap)) { |
| return; |
| } |
| int ix = SkScalarRoundToInt(matrix.getTranslateX()); |
| int iy = SkScalarRoundToInt(matrix.getTranslateY()); |
| if (clipHandlesSprite(*fRC, ix, iy, pmap)) { |
| SkSTArenaAlloc<kSkBlitterContextSize> allocator; |
| // blitter will be owned by the allocator. |
| SkBlitter* blitter = SkBlitter::ChooseSprite(fDst, *paint, pmap, ix, iy, &allocator, |
| fRC->clipShader()); |
| if (blitter) { |
| SkScan::FillIRect(SkIRect::MakeXYWH(ix, iy, pmap.width(), pmap.height()), |
| *fRC, blitter); |
| return; |
| } |
| // if !blitter, then we fall-through to the slower case |
| } |
| } |
| |
| // now make a temp draw on the stack, and use it |
| // |
| SkDraw draw(*this); |
| draw.fMatrixProvider = &matrixProvider; |
| |
| // For a long time, the CPU backend treated A8 bitmaps as coverage, rather than alpha. This was |
| // inconsistent with the GPU backend (skbug.com/9692). When this was fixed, it altered behavior |
| // for some Android apps (b/231400686). Thus: keep the old behavior in the framework. |
| #if defined(SK_SUPPORT_LEGACY_ALPHA_BITMAP_AS_COVERAGE) |
| if (bitmap.colorType() == kAlpha_8_SkColorType && !paint->getColorFilter()) { |
| draw.drawBitmapAsMask(bitmap, sampling, *paint); |
| return; |
| } |
| #endif |
| |
| SkPaint paintWithShader = make_paint_with_image(*paint, bitmap, sampling); |
| const SkRect srcBounds = SkRect::MakeIWH(bitmap.width(), bitmap.height()); |
| if (dstBounds) { |
| this->drawRect(srcBounds, paintWithShader, &prematrix, dstBounds); |
| } else { |
| draw.drawRect(srcBounds, paintWithShader); |
| } |
| } |
| |
| void SkDraw::drawSprite(const SkBitmap& bitmap, int x, int y, const SkPaint& origPaint) const { |
| SkDEBUGCODE(this->validate();) |
| |
| // nothing to draw |
| if (fRC->isEmpty() || |
| bitmap.width() == 0 || bitmap.height() == 0 || |
| bitmap.colorType() == kUnknown_SkColorType) { |
| return; |
| } |
| |
| const SkIRect bounds = SkIRect::MakeXYWH(x, y, bitmap.width(), bitmap.height()); |
| |
| if (fRC->quickReject(bounds)) { |
| return; // nothing to draw |
| } |
| |
| SkPaint paint(origPaint); |
| paint.setStyle(SkPaint::kFill_Style); |
| |
| SkPixmap pmap; |
| if (!bitmap.peekPixels(&pmap)) { |
| return; |
| } |
| |
| if (nullptr == paint.getColorFilter() && clipHandlesSprite(*fRC, x, y, pmap)) { |
| // blitter will be owned by the allocator. |
| SkSTArenaAlloc<kSkBlitterContextSize> allocator; |
| SkBlitter* blitter = SkBlitter::ChooseSprite(fDst, paint, pmap, x, y, &allocator, |
| fRC->clipShader()); |
| if (blitter) { |
| SkScan::FillIRect(bounds, *fRC, blitter); |
| return; |
| } |
| } |
| |
| SkMatrix matrix; |
| SkRect r; |
| |
| // get a scalar version of our rect |
| r.set(bounds); |
| |
| // create shader with offset |
| matrix.setTranslate(r.fLeft, r.fTop); |
| SkPaint paintWithShader = make_paint_with_image(paint, bitmap, SkSamplingOptions(), &matrix); |
| SkDraw draw(*this); |
| SkOverrideDeviceMatrixProvider matrixProvider(SkMatrix::I()); |
| draw.fMatrixProvider = &matrixProvider; |
| // call ourself with a rect |
| draw.drawRect(r, paintWithShader); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #ifdef SK_DEBUG |
| |
| void SkDraw::validate() const { |
| SkASSERT(fMatrixProvider != nullptr); |
| SkASSERT(fRC != nullptr); |
| |
| const SkIRect& cr = fRC->getBounds(); |
| SkIRect br; |
| |
| br.setWH(fDst.width(), fDst.height()); |
| SkASSERT(cr.isEmpty() || br.contains(cr)); |
| } |
| |
| #endif |
| |
| //////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #include "include/core/SkPath.h" |
| #include "include/core/SkRegion.h" |
| #include "src/core/SkBlitter.h" |
| #include "src/core/SkDraw.h" |
| |
| bool SkDraw::ComputeMaskBounds(const SkRect& devPathBounds, const SkIRect& clipBounds, |
| const SkMaskFilter* filter, const SkMatrix* filterMatrix, |
| SkIRect* bounds) { |
| // init our bounds from the path |
| *bounds = devPathBounds.makeOutset(SK_ScalarHalf, SK_ScalarHalf).roundOut(); |
| |
| SkIPoint margin = SkIPoint::Make(0, 0); |
| if (filter) { |
| SkASSERT(filterMatrix); |
| |
| SkMask srcM, dstM; |
| |
| srcM.fBounds = *bounds; |
| srcM.fFormat = SkMask::kA8_Format; |
| if (!as_MFB(filter)->filterMask(&dstM, srcM, *filterMatrix, &margin)) { |
| return false; |
| } |
| } |
| |
| // trim the bounds to reflect the clip (plus whatever slop the filter needs) |
| // Ugh. Guard against gigantic margins from wacky filters. Without this |
| // check we can request arbitrary amounts of slop beyond our visible |
| // clip, and bring down the renderer (at least on finite RAM machines |
| // like handsets, etc.). Need to balance this invented value between |
| // quality of large filters like blurs, and the corresponding memory |
| // requests. |
| static constexpr int kMaxMargin = 128; |
| if (!bounds->intersect(clipBounds.makeOutset(std::min(margin.fX, kMaxMargin), |
| std::min(margin.fY, kMaxMargin)))) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| static void draw_into_mask(const SkMask& mask, const SkPath& devPath, |
| SkStrokeRec::InitStyle style) { |
| SkDraw draw; |
| if (!draw.fDst.reset(mask)) { |
| return; |
| } |
| |
| SkRasterClip clip; |
| SkMatrix matrix; |
| SkPaint paint; |
| |
| clip.setRect(SkIRect::MakeWH(mask.fBounds.width(), mask.fBounds.height())); |
| matrix.setTranslate(-SkIntToScalar(mask.fBounds.fLeft), |
| -SkIntToScalar(mask.fBounds.fTop)); |
| |
| SkMatrixProvider matrixProvider(matrix); |
| draw.fRC = &clip; |
| draw.fMatrixProvider = &matrixProvider; |
| paint.setAntiAlias(true); |
| switch (style) { |
| case SkStrokeRec::kHairline_InitStyle: |
| SkASSERT(!paint.getStrokeWidth()); |
| paint.setStyle(SkPaint::kStroke_Style); |
| break; |
| case SkStrokeRec::kFill_InitStyle: |
| SkASSERT(paint.getStyle() == SkPaint::kFill_Style); |
| break; |
| |
| } |
| draw.drawPath(devPath, paint); |
| } |
| |
| bool SkDraw::DrawToMask(const SkPath& devPath, const SkIRect& clipBounds, |
| const SkMaskFilter* filter, const SkMatrix* filterMatrix, |
| SkMask* mask, SkMask::CreateMode mode, |
| SkStrokeRec::InitStyle style) { |
| if (devPath.isEmpty()) { |
| return false; |
| } |
| |
| if (SkMask::kJustRenderImage_CreateMode != mode) { |
| // By using infinite bounds for inverse fills, ComputeMaskBounds is able to clip it to |
| // 'clipBounds' outset by whatever extra margin the mask filter requires. |
| static const SkRect kInverseBounds = { SK_ScalarNegativeInfinity, SK_ScalarNegativeInfinity, |
| SK_ScalarInfinity, SK_ScalarInfinity}; |
| SkRect pathBounds = devPath.isInverseFillType() ? kInverseBounds |
| : devPath.getBounds(); |
| if (!ComputeMaskBounds(pathBounds, clipBounds, filter, |
| filterMatrix, &mask->fBounds)) |
| return false; |
| } |
| |
| if (SkMask::kComputeBoundsAndRenderImage_CreateMode == mode) { |
| mask->fFormat = SkMask::kA8_Format; |
| mask->fRowBytes = mask->fBounds.width(); |
| size_t size = mask->computeImageSize(); |
| if (0 == size) { |
| // we're too big to allocate the mask, abort |
| return false; |
| } |
| mask->fImage = SkMask::AllocImage(size, SkMask::kZeroInit_Alloc); |
| } |
| |
| if (SkMask::kJustComputeBounds_CreateMode != mode) { |
| draw_into_mask(*mask, devPath, style); |
| } |
| |
| return true; |
| } |
