| /* |
| * 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. |
| */ |
| #if !defined(__STDC_LIMIT_MACROS) |
| #define __STDC_LIMIT_MACROS |
| #endif |
| |
| #include "SkArenaAlloc.h" |
| #include "SkAutoBlitterChoose.h" |
| #include "SkBlendModePriv.h" |
| #include "SkBlitter.h" |
| #include "SkCanvas.h" |
| #include "SkColorPriv.h" |
| #include "SkDevice.h" |
| #include "SkDeviceLooper.h" |
| #include "SkDraw.h" |
| #include "SkDrawProcs.h" |
| #include "SkFindAndPlaceGlyph.h" |
| #include "SkMaskFilter.h" |
| #include "SkMatrix.h" |
| #include "SkMatrixUtils.h" |
| #include "SkPaint.h" |
| #include "SkPathEffect.h" |
| #include "SkRasterClip.h" |
| #include "SkRasterizer.h" |
| #include "SkRRect.h" |
| #include "SkScan.h" |
| #include "SkShader.h" |
| #include "SkString.h" |
| #include "SkStroke.h" |
| #include "SkStrokeRec.h" |
| #include "SkTemplates.h" |
| #include "SkTextMapStateProc.h" |
| #include "SkTLazy.h" |
| #include "SkUtils.h" |
| |
| static SkPaint make_paint_with_image( |
| const SkPaint& origPaint, const SkBitmap& bitmap, SkMatrix* matrix = nullptr) { |
| SkPaint paint(origPaint); |
| paint.setShader(SkMakeBitmapShader(bitmap, SkShader::kClamp_TileMode, |
| SkShader::kClamp_TileMode, matrix, |
| kNever_SkCopyPixelsMode)); |
| return paint; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkDraw::SkDraw() { |
| sk_bzero(this, sizeof(*this)); |
| } |
| |
| bool SkDraw::computeConservativeLocalClipBounds(SkRect* localBounds) const { |
| if (fRC->isEmpty()) { |
| return false; |
| } |
| |
| SkMatrix inverse; |
| if (!fMatrix->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; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| typedef void (*BitmapXferProc)(void* pixels, size_t bytes, uint32_t data); |
| |
| static void D_Clear_BitmapXferProc(void* pixels, size_t bytes, uint32_t) { |
| sk_bzero(pixels, bytes); |
| } |
| |
| static void D_Dst_BitmapXferProc(void*, size_t, uint32_t data) {} |
| |
| static void D32_Src_BitmapXferProc(void* pixels, size_t bytes, uint32_t data) { |
| sk_memset32((uint32_t*)pixels, data, SkToInt(bytes >> 2)); |
| } |
| |
| static void D16_Src_BitmapXferProc(void* pixels, size_t bytes, uint32_t data) { |
| sk_memset16((uint16_t*)pixels, data, SkToInt(bytes >> 1)); |
| } |
| |
| static void DA8_Src_BitmapXferProc(void* pixels, size_t bytes, uint32_t data) { |
| memset(pixels, data, bytes); |
| } |
| |
| static BitmapXferProc ChooseBitmapXferProc(const SkPixmap& dst, const SkPaint& paint, |
| uint32_t* data) { |
| // todo: we can apply colorfilter up front if no shader, so we wouldn't |
| // need to abort this fastpath |
| if (paint.getShader() || paint.getColorFilter() || dst.colorSpace()) { |
| return nullptr; |
| } |
| |
| SkBlendMode mode = paint.getBlendMode(); |
| SkColor color = paint.getColor(); |
| |
| // collaps modes based on color... |
| if (SkBlendMode::kSrcOver == mode) { |
| unsigned alpha = SkColorGetA(color); |
| if (0 == alpha) { |
| mode = SkBlendMode::kDst; |
| } else if (0xFF == alpha) { |
| mode = SkBlendMode::kSrc; |
| } |
| } |
| |
| switch (mode) { |
| case SkBlendMode::kClear: |
| // SkDebugf("--- D_Clear_BitmapXferProc\n"); |
| return D_Clear_BitmapXferProc; // ignore data |
| case SkBlendMode::kDst: |
| // SkDebugf("--- D_Dst_BitmapXferProc\n"); |
| return D_Dst_BitmapXferProc; // ignore data |
| case SkBlendMode::kSrc: { |
| /* |
| should I worry about dithering for the lower depths? |
| */ |
| SkPMColor pmc = SkPreMultiplyColor(color); |
| switch (dst.colorType()) { |
| case kN32_SkColorType: |
| if (data) { |
| *data = pmc; |
| } |
| // SkDebugf("--- D32_Src_BitmapXferProc\n"); |
| return D32_Src_BitmapXferProc; |
| case kRGB_565_SkColorType: |
| if (data) { |
| *data = SkPixel32ToPixel16(pmc); |
| } |
| // SkDebugf("--- D16_Src_BitmapXferProc\n"); |
| return D16_Src_BitmapXferProc; |
| case kAlpha_8_SkColorType: |
| if (data) { |
| *data = SkGetPackedA32(pmc); |
| } |
| // SkDebugf("--- DA8_Src_BitmapXferProc\n"); |
| return DA8_Src_BitmapXferProc; |
| default: |
| break; |
| } |
| break; |
| } |
| default: |
| break; |
| } |
| return nullptr; |
| } |
| |
| static void CallBitmapXferProc(const SkPixmap& dst, const SkIRect& rect, BitmapXferProc proc, |
| uint32_t procData) { |
| int shiftPerPixel; |
| switch (dst.colorType()) { |
| case kN32_SkColorType: |
| shiftPerPixel = 2; |
| break; |
| case kRGB_565_SkColorType: |
| shiftPerPixel = 1; |
| break; |
| case kAlpha_8_SkColorType: |
| shiftPerPixel = 0; |
| break; |
| default: |
| SkDEBUGFAIL("Can't use xferproc on this config"); |
| return; |
| } |
| |
| uint8_t* pixels = (uint8_t*)dst.writable_addr(); |
| SkASSERT(pixels); |
| const size_t rowBytes = dst.rowBytes(); |
| const int widthBytes = rect.width() << shiftPerPixel; |
| |
| // skip down to the first scanline and X position |
| pixels += rect.fTop * rowBytes + (rect.fLeft << shiftPerPixel); |
| for (int scans = rect.height() - 1; scans >= 0; --scans) { |
| proc(pixels, widthBytes, procData); |
| pixels += rowBytes; |
| } |
| } |
| |
| void SkDraw::drawPaint(const SkPaint& paint) const { |
| SkDEBUGCODE(this->validate();) |
| |
| if (fRC->isEmpty()) { |
| return; |
| } |
| |
| SkIRect devRect; |
| devRect.set(0, 0, fDst.width(), fDst.height()); |
| |
| if (fRC->isBW()) { |
| /* If we don't have a shader (i.e. we're just a solid color) we may |
| be faster to operate directly on the device bitmap, rather than invoking |
| a blitter. Esp. true for xfermodes, which require a colorshader to be |
| present, which is just redundant work. Since we're drawing everywhere |
| in the clip, we don't have to worry about antialiasing. |
| */ |
| uint32_t procData = 0; // to avoid the warning |
| BitmapXferProc proc = ChooseBitmapXferProc(fDst, paint, &procData); |
| if (proc) { |
| if (D_Dst_BitmapXferProc == proc) { // nothing to do |
| return; |
| } |
| |
| SkRegion::Iterator iter(fRC->bwRgn()); |
| while (!iter.done()) { |
| CallBitmapXferProc(fDst, iter.rect(), proc, procData); |
| iter.next(); |
| } |
| return; |
| } |
| } |
| |
| // normal case: use a blitter |
| SkAutoBlitterChoose blitter(fDst, *fMatrix, paint); |
| SkScan::FillIRect(devRect, *fRC, blitter.get()); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| struct PtProcRec { |
| SkCanvas::PointMode fMode; |
| const SkPaint* fPaint; |
| const SkRegion* fClip; |
| const SkRasterClip* fRC; |
| |
| // computed values |
| SkFixed 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 void bw_square_proc(const PtProcRec& rec, const SkPoint devPts[], |
| int count, SkBlitter* blitter) { |
| const SkFixed radius = rec.fRadius; |
| for (int i = 0; i < count; i++) { |
| SkFixed x = SkScalarToFixed(devPts[i].fX); |
| SkFixed y = SkScalarToFixed(devPts[i].fY); |
| |
| SkXRect r; |
| r.fLeft = x - radius; |
| r.fTop = y - radius; |
| r.fRight = x + radius; |
| r.fBottom = y + radius; |
| |
| SkScan::FillXRect(r, *rec.fRC, blitter); |
| } |
| } |
| |
| static void aa_square_proc(const PtProcRec& rec, const SkPoint devPts[], |
| int count, SkBlitter* blitter) { |
| const SkFixed radius = rec.fRadius; |
| for (int i = 0; i < count; i++) { |
| SkFixed x = SkScalarToFixed(devPts[i].fX); |
| SkFixed y = SkScalarToFixed(devPts[i].fY); |
| |
| SkXRect r; |
| r.fLeft = x - radius; |
| r.fTop = y - radius; |
| r.fRight = x + radius; |
| r.fBottom = y + radius; |
| |
| SkScan::AntiFillXRect(r, *rec.fRC, blitter); |
| } |
| } |
| |
| // If this guy 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()) { |
| return false; |
| } |
| SkScalar width = paint.getStrokeWidth(); |
| if (0 == width) { |
| fMode = mode; |
| fPaint = &paint; |
| fClip = nullptr; |
| fRC = rc; |
| fRadius = SK_FixedHalf; |
| return true; |
| } |
| 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)) { |
| if (sx < 0) { |
| sx = -sx; |
| } |
| |
| fMode = mode; |
| fPaint = &paint; |
| fClip = nullptr; |
| fRC = rc; |
| fRadius = SkScalarToFixed(width * sx) >> 1; |
| 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 <= SK_FixedHalf) { // 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; |
| } |
| |
| PtProcRec rec; |
| if (!device && rec.init(mode, paint, fMatrix, fRC)) { |
| SkAutoBlitterChoose blitter(fDst, *fMatrix, paint); |
| |
| SkPoint devPts[MAX_DEV_PTS]; |
| const SkMatrix* matrix = fMatrix; |
| 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; |
| } |
| matrix->mapPoints(devPts, pts, n); |
| 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) { |
| 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); |
| if (device) { |
| device->drawPath(path, newPaint, &preMatrix, (count-1) == i); |
| } else { |
| 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 rec(paint); |
| SkPathEffect::PointData pointData; |
| |
| SkPath path; |
| path.moveTo(pts[0]); |
| path.lineTo(pts[1]); |
| |
| SkRect cullRect = SkRect::Make(fRC->getBounds()); |
| |
| if (paint.getPathEffect()->asPoints(&pointData, path, rec, |
| *fMatrix, &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 (SkPathEffect::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(!(SkPathEffect::PointData::kCircles_PointFlag & |
| pointData.fFlags)); |
| |
| SkRect r; |
| |
| for (int i = 0; i < pointData.fNumPoints; ++i) { |
| r.set(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; |
| } |
| } |
| // couldn't take fast path so fall through! |
| 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, nullptr, 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 SkPaint& paint, const SkMatrix& matrix, |
| SkPoint* strokeSize) { |
| if (SkPaint::kMiter_Join != paint.getStrokeJoin() || |
| paint.getStrokeMiter() < SK_ScalarSqrt2) { |
| return false; |
| } |
| |
| *strokeSize = compute_stroke_size(paint, matrix); |
| return true; |
| } |
| |
| SkDraw::RectType SkDraw::ComputeRectType(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() || |
| paint.getRasterizer() || !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(paint, matrix, strokeSize)) { |
| rtype = kStroke_RectType; |
| } else { |
| rtype = kPath_RectType; |
| } |
| return rtype; |
| } |
| |
| static const SkPoint* rect_points(const SkRect& r) { |
| return SkTCast<const SkPoint*>(&r); |
| } |
| |
| static SkPoint* rect_points(SkRect& r) { |
| return SkTCast<SkPoint*>(&r); |
| } |
| |
| 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 SkMatrix* matrix; |
| SkMatrix combinedMatrixStorage; |
| if (paintMatrix) { |
| SkASSERT(postPaintRect); |
| combinedMatrixStorage.setConcat(*fMatrix, *paintMatrix); |
| matrix = &combinedMatrixStorage; |
| } else { |
| SkASSERT(!postPaintRect); |
| matrix = fMatrix; |
| } |
| |
| SkPoint strokeSize; |
| RectType rtype = ComputeRectType(paint, *fMatrix, &strokeSize); |
| |
| if (kPath_RectType == rtype) { |
| SkDraw draw(*this); |
| if (paintMatrix) { |
| draw.fMatrix = matrix; |
| } |
| SkPath tmp; |
| tmp.addRect(prePaintRect); |
| tmp.setFillType(SkPath::kWinding_FillType); |
| draw.drawPath(tmp, paint, nullptr, true); |
| return; |
| } |
| |
| SkRect devRect; |
| const SkRect& paintRect = paintMatrix ? *postPaintRect : prePaintRect; |
| // skip the paintMatrix when transforming the rect by the CTM |
| fMatrix->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, *fMatrix); |
| bbox.outset(SkScalarHalf(ssize.x()), SkScalarHalf(ssize.y())); |
| } |
| } |
| |
| SkIRect ir = bbox.roundOut(); |
| if (fRC->quickReject(ir)) { |
| return; |
| } |
| |
| SkDeviceLooper looper(fDst, *fRC, ir, paint.isAntiAlias()); |
| while (looper.next()) { |
| SkRect localDevRect; |
| looper.mapRect(&localDevRect, devRect); |
| SkMatrix localMatrix; |
| looper.mapMatrix(&localMatrix, *matrix); |
| |
| SkAutoBlitterChoose blitterStorage(looper.getPixmap(), localMatrix, paint); |
| const SkRasterClip& clip = looper.getRC(); |
| 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(localDevRect, clip, blitter); |
| } else { |
| SkScan::FillRect(localDevRect, clip, blitter); |
| } |
| break; |
| case kStroke_RectType: |
| if (paint.isAntiAlias()) { |
| SkScan::AntiFrameRect(localDevRect, strokeSize, clip, blitter); |
| } else { |
| SkScan::FrameRect(localDevRect, strokeSize, clip, blitter); |
| } |
| break; |
| case kHair_RectType: |
| if (paint.isAntiAlias()) { |
| SkScan::AntiHairRect(localDevRect, clip, blitter); |
| } else { |
| SkScan::HairRect(localDevRect, clip, blitter); |
| } |
| break; |
| default: |
| SkDEBUGFAIL("bad rtype"); |
| } |
| } |
| } |
| |
| void SkDraw::drawDevMask(const SkMask& srcM, const SkPaint& paint) const { |
| if (srcM.fBounds.isEmpty()) { |
| return; |
| } |
| |
| const SkMask* mask = &srcM; |
| |
| SkMask dstM; |
| if (paint.getMaskFilter() && |
| paint.getMaskFilter()->filterMask(&dstM, srcM, *fMatrix, nullptr)) { |
| mask = &dstM; |
| } |
| SkAutoMaskFreeImage ami(dstM.fImage); |
| |
| SkAutoBlitterChoose blitterChooser(fDst, *fMatrix, 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); |
| } |
| |
| static SkScalar fast_len(const SkVector& vec) { |
| SkScalar x = SkScalarAbs(vec.fX); |
| SkScalar y = SkScalarAbs(vec.fY); |
| if (x < y) { |
| SkTSwap(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; |
| } |
| |
| { |
| // 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, *fMatrix, &coverage)) { |
| goto DRAW_PATH; |
| } |
| |
| if (paint.getPathEffect() || paint.getStyle() != SkPaint::kFill_Style) { |
| goto DRAW_PATH; |
| } |
| |
| if (paint.getRasterizer()) { |
| goto DRAW_PATH; |
| } |
| } |
| |
| if (paint.getMaskFilter()) { |
| // Transform the rrect into device space. |
| SkRRect devRRect; |
| if (rrect.transform(*fMatrix, &devRRect)) { |
| SkAutoBlitterChoose blitter(fDst, *fMatrix, paint); |
| if (paint.getMaskFilter()->filterRRect(devRRect, *fMatrix, *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); |
| } |
| |
| SkScalar SkDraw::ComputeResScaleForStroking(const SkMatrix& matrix) { |
| if (!matrix.hasPerspective()) { |
| SkScalar sx = SkPoint::Length(matrix[SkMatrix::kMScaleX], matrix[SkMatrix::kMSkewY]); |
| SkScalar sy = SkPoint::Length(matrix[SkMatrix::kMSkewX], matrix[SkMatrix::kMScaleY]); |
| if (SkScalarsAreFinite(sx, sy)) { |
| SkScalar scale = SkTMax(sx, sy); |
| if (scale > 0) { |
| return scale; |
| } |
| } |
| } |
| return 1; |
| } |
| |
| void SkDraw::drawDevPath(const SkPath& devPath, const SkPaint& paint, bool drawCoverage, |
| SkBlitter* customBlitter, bool doFill) const { |
| // Do a conservative quick-reject test, since a looper or other modifier may have moved us |
| // out of range. |
| if (!devPath.isInverseFillType()) { |
| // If we're a H or V line, our bounds will be empty. So we bloat here just so we don't |
| // appear empty to the intersects call. This also gives us slop in case we're antialiasing |
| SkRect pathBounds = devPath.getBounds().makeOutset(1, 1); |
| |
| if (paint.getMaskFilter()) { |
| paint.getMaskFilter()->computeFastBounds(pathBounds, &pathBounds); |
| |
| // Need to outset the path to work-around a bug in blurmaskfilter. When that is fixed |
| // we can remove this hack. See skbug.com/5542 |
| pathBounds.outset(7, 7); |
| } |
| |
| // Now compare against the clip's bounds |
| if (!SkRect::Make(fRC->getBounds()).intersects(pathBounds)) { |
| return; |
| } |
| } |
| |
| SkBlitter* blitter = nullptr; |
| SkAutoBlitterChoose blitterStorage; |
| if (nullptr == customBlitter) { |
| blitterStorage.choose(fDst, *fMatrix, paint, drawCoverage); |
| blitter = blitterStorage.get(); |
| } else { |
| blitter = customBlitter; |
| } |
| |
| if (paint.getMaskFilter()) { |
| SkStrokeRec::InitStyle style = doFill ? SkStrokeRec::kFill_InitStyle |
| : SkStrokeRec::kHairline_InitStyle; |
| if (paint.getMaskFilter()->filterPath(devPath, *fMatrix, *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; |
| default: |
| proc SK_INIT_TO_AVOID_WARNING; |
| SkDEBUGFAIL("unknown paint cap type"); |
| } |
| } 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; |
| default: |
| proc SK_INIT_TO_AVOID_WARNING; |
| SkDEBUGFAIL("unknown paint cap type"); |
| } |
| } |
| } |
| 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 tmpPath; |
| SkMatrix tmpMatrix; |
| const SkMatrix* matrix = fMatrix; |
| tmpPath.setIsVolatile(true); |
| |
| if (prePathMatrix) { |
| if (origPaint.getPathEffect() || origPaint.getStyle() != SkPaint::kFill_Style || |
| origPaint.getRasterizer()) { |
| SkPath* result = pathPtr; |
| |
| if (!pathIsMutable) { |
| result = &tmpPath; |
| pathIsMutable = true; |
| } |
| pathPtr->transform(*prePathMatrix, result); |
| pathPtr = result; |
| } else { |
| tmpMatrix.setConcat(*matrix, *prePathMatrix); |
| matrix = &tmpMatrix; |
| } |
| } |
| // at this point we're done with prePathMatrix |
| SkDEBUGCODE(prePathMatrix = (const SkMatrix*)0x50FF8001;) |
| |
| SkTCopyOnFirstWrite<SkPaint> paint(origPaint); |
| |
| { |
| SkScalar coverage; |
| if (SkDrawTreatAsHairline(origPaint, *matrix, &coverage)) { |
| if (SK_Scalar1 == coverage) { |
| paint.writable()->setStrokeWidth(0); |
| } else if (SkBlendMode_SupportsCoverageAsAlpha(origPaint.getBlendMode())) { |
| 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, |
| ComputeResScaleForStroking(*fMatrix)); |
| pathPtr = &tmpPath; |
| } |
| |
| if (paint->getRasterizer()) { |
| SkMask mask; |
| if (paint->getRasterizer()->rasterize(*pathPtr, *matrix, |
| &fRC->getBounds(), paint->getMaskFilter(), &mask, |
| SkMask::kComputeBoundsAndRenderImage_CreateMode)) { |
| this->drawDevMask(mask, *paint); |
| SkMask::FreeImage(mask.fImage); |
| } |
| return; |
| } |
| |
| // avoid possibly allocating a new path in transform if we can |
| SkPath* devPathPtr = pathIsMutable ? pathPtr : &tmpPath; |
| |
| // transform the path into device space |
| pathPtr->transform(*matrix, devPathPtr); |
| |
| this->drawDevPath(*devPathPtr, *paint, drawCoverage, customBlitter, doFill); |
| } |
| |
| void SkDraw::drawBitmapAsMask(const SkBitmap& bitmap, const SkPaint& paint) const { |
| SkASSERT(bitmap.colorType() == kAlpha_8_SkColorType); |
| |
| if (SkTreatAsSprite(*fMatrix, bitmap.dimensions(), paint)) { |
| int ix = SkScalarRoundToInt(fMatrix->getTranslateX()); |
| int iy = SkScalarRoundToInt(fMatrix->getTranslateY()); |
| |
| SkPixmap pmap; |
| if (!bitmap.peekPixels(&pmap)) { |
| return; |
| } |
| SkMask mask; |
| mask.fBounds.set(ix, iy, ix + pmap.width(), iy + 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.set(0, 0, |
| SkIntToScalar(bitmap.width()), SkIntToScalar(bitmap.height())); |
| fMatrix->mapRect(&r); |
| r.round(&mask.fBounds); |
| |
| // set the mask's bounds to the transformed bitmap-bounds, |
| // clipped to the actual device |
| { |
| SkIRect devBounds; |
| devBounds.set(0, 0, fDst.width(), fDst.height()); |
| // 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(*fMatrix); |
| |
| // 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.setFlags(paint.getFlags()); |
| tmpPaint.setFilterQuality(paint.getFilterQuality()); |
| SkPaint paintWithShader = make_paint_with_image(tmpPaint, bitmap); |
| SkRect rr; |
| rr.set(0, 0, SkIntToScalar(bitmap.width()), |
| SkIntToScalar(bitmap.height())); |
| c.drawRect(rr, paintWithShader); |
| } |
| this->drawDevMask(mask, paint); |
| } |
| } |
| |
| 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.set(0, 0, SkIntToScalar(width), SkIntToScalar(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(x, y, x + pmap.width(), y + pmap.height()); |
| } |
| |
| void SkDraw::drawBitmap(const SkBitmap& bitmap, const SkMatrix& prematrix, |
| const SkRect* dstBounds, 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); |
| } |
| |
| SkMatrix matrix; |
| matrix.setConcat(*fMatrix, prematrix); |
| |
| if (clipped_out(matrix, *fRC, bitmap.width(), bitmap.height())) { |
| return; |
| } |
| |
| if (bitmap.colorType() != kAlpha_8_SkColorType |
| && SkTreatAsSprite(matrix, bitmap.dimensions(), *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); |
| 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.fMatrix = &matrix; |
| |
| if (bitmap.colorType() == kAlpha_8_SkColorType && !paint->getColorFilter()) { |
| draw.drawBitmapAsMask(bitmap, *paint); |
| } else { |
| SkPaint paintWithShader = make_paint_with_image(*paint, bitmap); |
| 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); |
| 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, &matrix); |
| SkDraw draw(*this); |
| matrix.reset(); |
| draw.fMatrix = &matrix; |
| // call ourself with a rect |
| // is this OK if paint has a rasterizer? |
| draw.drawRect(r, paintWithShader); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #include "SkPaintPriv.h" |
| #include "SkScalerContext.h" |
| #include "SkGlyphCache.h" |
| #include "SkTextToPathIter.h" |
| #include "SkUtils.h" |
| |
| bool SkDraw::ShouldDrawTextAsPaths(const SkPaint& paint, const SkMatrix& ctm) { |
| // hairline glyphs are fast enough so we don't need to cache them |
| if (SkPaint::kStroke_Style == paint.getStyle() && 0 == paint.getStrokeWidth()) { |
| return true; |
| } |
| |
| // we don't cache perspective |
| if (ctm.hasPerspective()) { |
| return true; |
| } |
| |
| SkMatrix textM; |
| SkPaintPriv::MakeTextMatrix(&textM, paint); |
| return SkPaint::TooBigToUseCache(ctm, textM); |
| } |
| |
| void SkDraw::drawText_asPaths(const char text[], size_t byteLength, SkScalar x, SkScalar y, |
| const SkPaint& paint) const { |
| SkDEBUGCODE(this->validate();) |
| |
| SkTextToPathIter iter(text, byteLength, paint, true); |
| |
| SkMatrix matrix; |
| matrix.setScale(iter.getPathScale(), iter.getPathScale()); |
| matrix.postTranslate(x, y); |
| |
| const SkPath* iterPath; |
| SkScalar xpos, prevXPos = 0; |
| |
| while (iter.next(&iterPath, &xpos)) { |
| matrix.postTranslate(xpos - prevXPos, 0); |
| if (iterPath) { |
| this->drawPath(*iterPath, iter.getPaint(), &matrix, false); |
| } |
| prevXPos = xpos; |
| } |
| } |
| |
| // disable warning : local variable used without having been initialized |
| #if defined _WIN32 |
| #pragma warning ( push ) |
| #pragma warning ( disable : 4701 ) |
| #endif |
| |
| //////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| class DrawOneGlyph { |
| public: |
| DrawOneGlyph(const SkDraw& draw, const SkPaint& paint, SkGlyphCache* cache, SkBlitter* blitter) |
| : fUseRegionToDraw(UsingRegionToDraw(draw.fRC)) |
| , fGlyphCache(cache) |
| , fBlitter(blitter) |
| , fClip(fUseRegionToDraw ? &draw.fRC->bwRgn() : nullptr) |
| , fDraw(draw) |
| , fPaint(paint) |
| , fClipBounds(PickClipBounds(draw)) { } |
| |
| void operator()(const SkGlyph& glyph, SkPoint position, SkPoint rounding) { |
| position += rounding; |
| // Prevent glyphs from being drawn outside of or straddling the edge of device space. |
| // Comparisons written a little weirdly so that NaN coordinates are treated safely. |
| auto gt = [](float a, int b) { return !(a <= (float)b); }; |
| auto lt = [](float a, int b) { return !(a >= (float)b); }; |
| if (gt(position.fX, INT_MAX - (INT16_MAX + UINT16_MAX)) || |
| lt(position.fX, INT_MIN - (INT16_MIN + 0 /*UINT16_MIN*/)) || |
| gt(position.fY, INT_MAX - (INT16_MAX + UINT16_MAX)) || |
| lt(position.fY, INT_MIN - (INT16_MIN + 0 /*UINT16_MIN*/))) { |
| return; |
| } |
| |
| int left = SkScalarFloorToInt(position.fX); |
| int top = SkScalarFloorToInt(position.fY); |
| SkASSERT(glyph.fWidth > 0 && glyph.fHeight > 0); |
| |
| left += glyph.fLeft; |
| top += glyph.fTop; |
| |
| int right = left + glyph.fWidth; |
| int bottom = top + glyph.fHeight; |
| |
| SkMask mask; |
| mask.fBounds.set(left, top, right, bottom); |
| SkASSERT(!mask.fBounds.isEmpty()); |
| |
| if (fUseRegionToDraw) { |
| SkRegion::Cliperator clipper(*fClip, mask.fBounds); |
| |
| if (!clipper.done() && this->getImageData(glyph, &mask)) { |
| const SkIRect& cr = clipper.rect(); |
| do { |
| this->blitMask(mask, cr); |
| clipper.next(); |
| } while (!clipper.done()); |
| } |
| } else { |
| SkIRect storage; |
| SkIRect* bounds = &mask.fBounds; |
| |
| // this extra test is worth it, assuming that most of the time it succeeds |
| // since we can avoid writing to storage |
| if (!fClipBounds.containsNoEmptyCheck(mask.fBounds)) { |
| if (!storage.intersectNoEmptyCheck(mask.fBounds, fClipBounds)) |
| return; |
| bounds = &storage; |
| } |
| |
| if (this->getImageData(glyph, &mask)) { |
| this->blitMask(mask, *bounds); |
| } |
| } |
| } |
| |
| private: |
| static bool UsingRegionToDraw(const SkRasterClip* rClip) { |
| return rClip->isBW() && !rClip->isRect(); |
| } |
| |
| static SkIRect PickClipBounds(const SkDraw& draw) { |
| const SkRasterClip& rasterClip = *draw.fRC; |
| |
| if (rasterClip.isBW()) { |
| return rasterClip.bwRgn().getBounds(); |
| } else { |
| return rasterClip.aaRgn().getBounds(); |
| } |
| } |
| |
| bool getImageData(const SkGlyph& glyph, SkMask* mask) { |
| uint8_t* bits = (uint8_t*)(fGlyphCache->findImage(glyph)); |
| if (nullptr == bits) { |
| return false; // can't rasterize glyph |
| } |
| mask->fImage = bits; |
| mask->fRowBytes = glyph.rowBytes(); |
| mask->fFormat = static_cast<SkMask::Format>(glyph.fMaskFormat); |
| return true; |
| } |
| |
| void blitMask(const SkMask& mask, const SkIRect& clip) const { |
| if (SkMask::kARGB32_Format == mask.fFormat) { |
| SkBitmap bm; |
| bm.installPixels( |
| SkImageInfo::MakeN32Premul(mask.fBounds.width(), mask.fBounds.height()), |
| (SkPMColor*)mask.fImage, mask.fRowBytes); |
| |
| fDraw.drawSprite(bm, mask.fBounds.x(), mask.fBounds.y(), fPaint); |
| } else { |
| fBlitter->blitMask(mask, clip); |
| } |
| } |
| |
| const bool fUseRegionToDraw; |
| SkGlyphCache * const fGlyphCache; |
| SkBlitter * const fBlitter; |
| const SkRegion* const fClip; |
| const SkDraw& fDraw; |
| const SkPaint& fPaint; |
| const SkIRect fClipBounds; |
| }; |
| |
| //////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| uint32_t SkDraw::scalerContextFlags() const { |
| uint32_t flags = SkPaint::kBoostContrast_ScalerContextFlag; |
| if (!fDst.colorSpace()) { |
| flags |= SkPaint::kFakeGamma_ScalerContextFlag; |
| } |
| return flags; |
| } |
| |
| void SkDraw::drawText(const char text[], size_t byteLength, SkScalar x, SkScalar y, |
| const SkPaint& paint, const SkSurfaceProps* props) const { |
| SkASSERT(byteLength == 0 || text != nullptr); |
| |
| SkDEBUGCODE(this->validate();) |
| |
| // nothing to draw |
| if (text == nullptr || byteLength == 0 || fRC->isEmpty()) { |
| return; |
| } |
| |
| // SkScalarRec doesn't currently have a way of representing hairline stroke and |
| // will fill if its frame-width is 0. |
| if (ShouldDrawTextAsPaths(paint, *fMatrix)) { |
| this->drawText_asPaths(text, byteLength, x, y, paint); |
| return; |
| } |
| |
| SkAutoGlyphCache cache(paint, props, this->scalerContextFlags(), fMatrix); |
| |
| // The Blitter Choose needs to be live while using the blitter below. |
| SkAutoBlitterChoose blitterChooser(fDst, *fMatrix, paint); |
| SkAAClipBlitterWrapper wrapper(*fRC, blitterChooser.get()); |
| DrawOneGlyph drawOneGlyph(*this, paint, cache.get(), wrapper.getBlitter()); |
| |
| SkFindAndPlaceGlyph::ProcessText( |
| paint.getTextEncoding(), text, byteLength, |
| {x, y}, *fMatrix, paint.getTextAlign(), cache.get(), drawOneGlyph); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| void SkDraw::drawPosText_asPaths(const char text[], size_t byteLength, const SkScalar pos[], |
| int scalarsPerPosition, const SkPoint& offset, |
| const SkPaint& origPaint, const SkSurfaceProps* props) const { |
| // setup our std paint, in hopes of getting hits in the cache |
| SkPaint paint(origPaint); |
| SkScalar matrixScale = paint.setupForAsPaths(); |
| |
| SkMatrix matrix; |
| matrix.setScale(matrixScale, matrixScale); |
| |
| // Temporarily jam in kFill, so we only ever ask for the raw outline from the cache. |
| paint.setStyle(SkPaint::kFill_Style); |
| paint.setPathEffect(nullptr); |
| |
| SkPaint::GlyphCacheProc glyphCacheProc = SkPaint::GetGlyphCacheProc(paint.getTextEncoding(), |
| paint.isDevKernText(), |
| true); |
| SkAutoGlyphCache cache(paint, props, this->scalerContextFlags(), nullptr); |
| |
| const char* stop = text + byteLength; |
| SkTextAlignProc alignProc(paint.getTextAlign()); |
| SkTextMapStateProc tmsProc(SkMatrix::I(), offset, scalarsPerPosition); |
| |
| // Now restore the original settings, so we "draw" with whatever style/stroking. |
| paint.setStyle(origPaint.getStyle()); |
| paint.setPathEffect(origPaint.refPathEffect()); |
| |
| while (text < stop) { |
| const SkGlyph& glyph = glyphCacheProc(cache.get(), &text); |
| if (glyph.fWidth) { |
| const SkPath* path = cache->findPath(glyph); |
| if (path) { |
| SkPoint tmsLoc; |
| tmsProc(pos, &tmsLoc); |
| SkPoint loc; |
| alignProc(tmsLoc, glyph, &loc); |
| |
| matrix[SkMatrix::kMTransX] = loc.fX; |
| matrix[SkMatrix::kMTransY] = loc.fY; |
| this->drawPath(*path, paint, &matrix, false); |
| } |
| } |
| pos += scalarsPerPosition; |
| } |
| } |
| |
| void SkDraw::drawPosText(const char text[], size_t byteLength, const SkScalar pos[], |
| int scalarsPerPosition, const SkPoint& offset, const SkPaint& paint, |
| const SkSurfaceProps* props) const { |
| SkASSERT(byteLength == 0 || text != nullptr); |
| SkASSERT(1 == scalarsPerPosition || 2 == scalarsPerPosition); |
| |
| SkDEBUGCODE(this->validate();) |
| |
| // nothing to draw |
| if (text == nullptr || byteLength == 0 || fRC->isEmpty()) { |
| return; |
| } |
| |
| if (ShouldDrawTextAsPaths(paint, *fMatrix)) { |
| this->drawPosText_asPaths(text, byteLength, pos, scalarsPerPosition, offset, paint, props); |
| return; |
| } |
| |
| SkAutoGlyphCache cache(paint, props, this->scalerContextFlags(), fMatrix); |
| |
| // The Blitter Choose needs to be live while using the blitter below. |
| SkAutoBlitterChoose blitterChooser(fDst, *fMatrix, paint); |
| SkAAClipBlitterWrapper wrapper(*fRC, blitterChooser.get()); |
| DrawOneGlyph drawOneGlyph(*this, paint, cache.get(), wrapper.getBlitter()); |
| SkPaint::Align textAlignment = paint.getTextAlign(); |
| |
| SkFindAndPlaceGlyph::ProcessPosText( |
| paint.getTextEncoding(), text, byteLength, |
| offset, *fMatrix, pos, scalarsPerPosition, textAlignment, cache.get(), drawOneGlyph); |
| } |
| |
| #if defined _WIN32 |
| #pragma warning ( pop ) |
| #endif |
| |
| //////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #ifdef SK_DEBUG |
| |
| void SkDraw::validate() const { |
| SkASSERT(fMatrix != nullptr); |
| SkASSERT(fRC != nullptr); |
| |
| const SkIRect& cr = fRC->getBounds(); |
| SkIRect br; |
| |
| br.set(0, 0, fDst.width(), fDst.height()); |
| SkASSERT(cr.isEmpty() || br.contains(cr)); |
| } |
| |
| #endif |
| |
| //////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #include "SkPath.h" |
| #include "SkDraw.h" |
| #include "SkRegion.h" |
| #include "SkBlitter.h" |
| |
| static bool compute_bounds(const SkPath& devPath, const SkIRect* clipBounds, |
| const SkMaskFilter* filter, const SkMatrix* filterMatrix, |
| SkIRect* bounds) { |
| if (devPath.isEmpty()) { |
| return false; |
| } |
| |
| // init our bounds from the path |
| *bounds = devPath.getBounds().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 (!filter->filterMask(&dstM, srcM, *filterMatrix, &margin)) { |
| return false; |
| } |
| } |
| |
| // (possibly) trim the bounds to reflect the clip |
| // (plus whatever slop the filter needs) |
| if (clipBounds) { |
| // 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 const int MAX_MARGIN = 128; |
| if (!bounds->intersect(clipBounds->makeOutset(SkMin32(margin.fX, MAX_MARGIN), |
| SkMin32(margin.fY, MAX_MARGIN)))) { |
| 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)); |
| |
| draw.fRC = &clip; |
| draw.fMatrix = &matrix; |
| 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 (SkMask::kJustRenderImage_CreateMode != mode) { |
| if (!compute_bounds(devPath, 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); |
| memset(mask->fImage, 0, mask->computeImageSize()); |
| } |
| |
| if (SkMask::kJustComputeBounds_CreateMode != mode) { |
| draw_into_mask(*mask, devPath, style); |
| } |
| |
| return true; |
| } |
