| /* |
| * 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/SkColorType.h" |
| #include "include/core/SkMatrix.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPath.h" |
| #include "include/core/SkPathEffect.h" |
| #include "include/core/SkPixmap.h" |
| #include "include/core/SkPoint.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkRegion.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkStrokeRec.h" |
| #include "include/core/SkTileMode.h" |
| #include "include/private/base/SkAssert.h" |
| #include "include/private/base/SkDebug.h" |
| #include "include/private/base/SkFixed.h" |
| #include "include/private/base/SkTemplates.h" |
| #include "include/private/base/SkTo.h" |
| #include "src/base/SkArenaAlloc.h" |
| #include "src/base/SkTLazy.h" |
| #include "src/core/SkAutoBlitterChoose.h" |
| #include "src/core/SkBlitter.h" |
| #include "src/core/SkDevice.h" |
| #include "src/core/SkImageInfoPriv.h" |
| #include "src/core/SkImagePriv.h" |
| #include "src/core/SkMatrixProvider.h" |
| #include "src/core/SkMatrixUtils.h" |
| #include "src/core/SkPathEffectBase.h" |
| #include "src/core/SkRasterClip.h" |
| #include "src/core/SkRectPriv.h" |
| #include "src/core/SkScan.h" |
| |
| #include <cstdint> |
| |
| #if defined(SK_SUPPORT_LEGACY_ALPHA_BITMAP_AS_COVERAGE) |
| #include "src/core/SkMaskFilterBase.h" |
| #endif |
| |
| using namespace skia_private; |
| |
| 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() { |
| fBlitterChooser = SkBlitter::Choose; |
| } |
| |
| 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 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->isAntiAlias())) { |
| // |
| // 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); |
| SkMatrixProvider matrixProvider(SkMatrix::I()); |
| draw.fMatrixProvider = &matrixProvider; |
| // call ourself with a rect |
| draw.drawRect(r, paintWithShader); |
| } |
| |
| #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); |
| } |
| |
| 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.isAntiAlias())) |
| { |
| 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 |
| AutoTMalloc<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 |
| |