| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkPDFDevice.h" |
| |
| #include "SkAdvancedTypefaceMetrics.h" |
| #include "SkAnnotationKeys.h" |
| #include "SkBitmapDevice.h" |
| #include "SkBitmapKey.h" |
| #include "SkCanvas.h" |
| #include "SkClipOpPriv.h" |
| #include "SkClusterator.h" |
| #include "SkColor.h" |
| #include "SkColorFilter.h" |
| #include "SkDraw.h" |
| #include "SkGlyphCache.h" |
| #include "SkGlyphRun.h" |
| #include "SkImageFilterCache.h" |
| #include "SkJpegEncoder.h" |
| #include "SkMakeUnique.h" |
| #include "SkMaskFilterBase.h" |
| #include "SkPDFBitmap.h" |
| #include "SkPDFCanon.h" |
| #include "SkPDFDocumentPriv.h" |
| #include "SkPDFFont.h" |
| #include "SkPDFFormXObject.h" |
| #include "SkPDFGraphicState.h" |
| #include "SkPDFResourceDict.h" |
| #include "SkPDFShader.h" |
| #include "SkPDFTypes.h" |
| #include "SkPDFUtils.h" |
| #include "SkPath.h" |
| #include "SkPathEffect.h" |
| #include "SkPathOps.h" |
| #include "SkPixelRef.h" |
| #include "SkRRect.h" |
| #include "SkRasterClip.h" |
| #include "SkScopeExit.h" |
| #include "SkString.h" |
| #include "SkSurface.h" |
| #include "SkTemplates.h" |
| #include "SkTextBlob.h" |
| #include "SkTextFormatParams.h" |
| #include "SkTo.h" |
| #include "SkUTF.h" |
| #include "SkXfermodeInterpretation.h" |
| |
| #include <vector> |
| |
| #ifndef SK_PDF_MASK_QUALITY |
| // If MASK_QUALITY is in [0,100], will be used for JpegEncoder. |
| // Otherwise, just encode masks losslessly. |
| #define SK_PDF_MASK_QUALITY 50 |
| // Since these masks are used for blurry shadows, we shouldn't need |
| // high quality. Raise this value if your shadows have visible JPEG |
| // artifacts. |
| // If SkJpegEncoder::Encode fails, we will fall back to the lossless |
| // encoding. |
| #endif |
| |
| // Utility functions |
| |
| static SkPath to_path(const SkRect& r) { |
| SkPath p; |
| p.addRect(r); |
| return p; |
| } |
| |
| // This function destroys the mask and either frees or takes the pixels. |
| sk_sp<SkImage> mask_to_greyscale_image(SkMask* mask) { |
| sk_sp<SkImage> img; |
| SkPixmap pm(SkImageInfo::Make(mask->fBounds.width(), mask->fBounds.height(), |
| kGray_8_SkColorType, kOpaque_SkAlphaType), |
| mask->fImage, mask->fRowBytes); |
| const int imgQuality = SK_PDF_MASK_QUALITY; |
| if (imgQuality <= 100 && imgQuality >= 0) { |
| SkDynamicMemoryWStream buffer; |
| SkJpegEncoder::Options jpegOptions; |
| jpegOptions.fQuality = imgQuality; |
| if (SkJpegEncoder::Encode(&buffer, pm, jpegOptions)) { |
| img = SkImage::MakeFromEncoded(buffer.detachAsData()); |
| SkASSERT(img); |
| if (img) { |
| SkMask::FreeImage(mask->fImage); |
| } |
| } |
| } |
| if (!img) { |
| img = SkImage::MakeFromRaster(pm, [](const void* p, void*) { SkMask::FreeImage((void*)p); }, |
| nullptr); |
| } |
| *mask = SkMask(); // destructive; |
| return img; |
| } |
| |
| sk_sp<SkImage> alpha_image_to_greyscale_image(const SkImage* mask) { |
| int w = mask->width(), h = mask->height(); |
| SkBitmap greyBitmap; |
| greyBitmap.allocPixels(SkImageInfo::Make(w, h, kGray_8_SkColorType, kOpaque_SkAlphaType)); |
| if (!mask->readPixels(SkImageInfo::MakeA8(w, h), |
| greyBitmap.getPixels(), greyBitmap.rowBytes(), 0, 0)) { |
| return nullptr; |
| } |
| return SkImage::MakeFromBitmap(greyBitmap); |
| } |
| |
| static void draw_points(SkCanvas::PointMode mode, |
| size_t count, |
| const SkPoint* points, |
| const SkPaint& paint, |
| const SkIRect& bounds, |
| const SkMatrix& ctm, |
| SkBaseDevice* device) { |
| SkRasterClip rc(bounds); |
| SkDraw draw; |
| draw.fDst = SkPixmap(SkImageInfo::MakeUnknown(bounds.right(), bounds.bottom()), nullptr, 0); |
| draw.fMatrix = &ctm; |
| draw.fRC = &rc; |
| draw.drawPoints(mode, count, points, paint, device); |
| } |
| |
| // If the paint will definitely draw opaquely, replace kSrc with |
| // kSrcOver. http://crbug.com/473572 |
| static void replace_srcmode_on_opaque_paint(SkPaint* paint) { |
| if (kSrcOver_SkXfermodeInterpretation == SkInterpretXfermode(*paint, false)) { |
| paint->setBlendMode(SkBlendMode::kSrcOver); |
| } |
| } |
| |
| // A shader's matrix is: CTMM x LocalMatrix x WrappingLocalMatrix. We want to |
| // switch to device space, where CTM = I, while keeping the original behavior. |
| // |
| // I * LocalMatrix * NewWrappingMatrix = CTM * LocalMatrix |
| // LocalMatrix * NewWrappingMatrix = CTM * LocalMatrix |
| // InvLocalMatrix * LocalMatrix * NewWrappingMatrix = InvLocalMatrix * CTM * LocalMatrix |
| // NewWrappingMatrix = InvLocalMatrix * CTM * LocalMatrix |
| // |
| static void transform_shader(SkPaint* paint, const SkMatrix& ctm) { |
| SkMatrix lm = SkPDFUtils::GetShaderLocalMatrix(paint->getShader()); |
| SkMatrix lmInv; |
| if (lm.invert(&lmInv)) { |
| SkMatrix m = SkMatrix::Concat(SkMatrix::Concat(lmInv, ctm), lm); |
| paint->setShader(paint->getShader()->makeWithLocalMatrix(m)); |
| } |
| } |
| |
| static void emit_pdf_color(SkColor4f color, SkWStream* result) { |
| SkASSERT(color.fA == 1); // We handle alpha elsewhere. |
| SkPDFUtils::AppendColorComponentF(color.fR, result); |
| result->writeText(" "); |
| SkPDFUtils::AppendColorComponentF(color.fG, result); |
| result->writeText(" "); |
| SkPDFUtils::AppendColorComponentF(color.fB, result); |
| result->writeText(" "); |
| } |
| |
| // If the paint has a color filter, apply the color filter to the shader or the |
| // paint color. Remove the color filter. |
| void remove_color_filter(SkPaint* paint) { |
| if (SkColorFilter* cf = paint->getColorFilter()) { |
| if (SkShader* shader = paint->getShader()) { |
| paint->setShader(shader->makeWithColorFilter(paint->refColorFilter())); |
| } else { |
| paint->setColor4f(cf->filterColor4f(paint->getColor4f(), nullptr), nullptr); |
| } |
| paint->setColorFilter(nullptr); |
| } |
| } |
| |
| SkPDFDevice::GraphicStackState::GraphicStackState(SkDynamicMemoryWStream* s) : fContentStream(s) { |
| } |
| |
| void SkPDFDevice::GraphicStackState::drainStack() { |
| if (fContentStream) { |
| while (fStackDepth) { |
| this->pop(); |
| } |
| } |
| SkASSERT(fStackDepth == 0); |
| } |
| |
| void SkPDFDevice::GraphicStackState::push() { |
| SkASSERT(fStackDepth < kMaxStackDepth); |
| fContentStream->writeText("q\n"); |
| fStackDepth++; |
| fEntries[fStackDepth] = fEntries[fStackDepth - 1]; |
| } |
| |
| void SkPDFDevice::GraphicStackState::pop() { |
| SkASSERT(fStackDepth > 0); |
| fContentStream->writeText("Q\n"); |
| fEntries[fStackDepth] = SkPDFDevice::GraphicStateEntry(); |
| fStackDepth--; |
| } |
| |
| /* Calculate an inverted path's equivalent non-inverted path, given the |
| * canvas bounds. |
| * outPath may alias with invPath (since this is supported by PathOps). |
| */ |
| static bool calculate_inverse_path(const SkRect& bounds, const SkPath& invPath, |
| SkPath* outPath) { |
| SkASSERT(invPath.isInverseFillType()); |
| return Op(to_path(bounds), invPath, kIntersect_SkPathOp, outPath); |
| } |
| |
| static SkRect rect_intersect(SkRect u, SkRect v) { |
| if (u.isEmpty() || v.isEmpty()) { return {0, 0, 0, 0}; } |
| return u.intersect(v) ? u : SkRect{0, 0, 0, 0}; |
| } |
| |
| // Test to see if the clipstack is a simple rect, If so, we can avoid all PathOps code |
| // and speed thing up. |
| static bool is_rect(const SkClipStack& clipStack, const SkRect& bounds, SkRect* dst) { |
| SkRect currentClip = bounds; |
| SkClipStack::Iter iter(clipStack, SkClipStack::Iter::kBottom_IterStart); |
| while (const SkClipStack::Element* element = iter.next()) { |
| SkRect elementRect{0, 0, 0, 0}; |
| switch (element->getDeviceSpaceType()) { |
| case SkClipStack::Element::DeviceSpaceType::kEmpty: |
| break; |
| case SkClipStack::Element::DeviceSpaceType::kRect: |
| elementRect = element->getDeviceSpaceRect(); |
| break; |
| default: |
| return false; |
| } |
| switch (element->getOp()) { |
| case kReplace_SkClipOp: |
| currentClip = rect_intersect(bounds, elementRect); |
| break; |
| case SkClipOp::kIntersect: |
| currentClip = rect_intersect(currentClip, elementRect); |
| break; |
| default: |
| return false; |
| } |
| } |
| *dst = currentClip; |
| return true; |
| } |
| |
| static void append_clip(const SkClipStack& clipStack, |
| const SkIRect& bounds, |
| SkWStream* wStream) { |
| // The bounds are slightly outset to ensure this is correct in the |
| // face of floating-point accuracy and possible SkRegion bitmap |
| // approximations. |
| SkRect outsetBounds = SkRect::Make(bounds.makeOutset(1, 1)); |
| |
| SkRect clipStackRect; |
| if (is_rect(clipStack, outsetBounds, &clipStackRect)) { |
| SkPDFUtils::AppendRectangle(clipStackRect, wStream); |
| wStream->writeText("W* n\n"); |
| return; |
| } |
| |
| SkPath clipPath; |
| (void)clipStack.asPath(&clipPath); |
| |
| if (Op(clipPath, to_path(outsetBounds), kIntersect_SkPathOp, &clipPath)) { |
| SkPDFUtils::EmitPath(clipPath, SkPaint::kFill_Style, wStream); |
| SkPath::FillType clipFill = clipPath.getFillType(); |
| NOT_IMPLEMENTED(clipFill == SkPath::kInverseEvenOdd_FillType, false); |
| NOT_IMPLEMENTED(clipFill == SkPath::kInverseWinding_FillType, false); |
| if (clipFill == SkPath::kEvenOdd_FillType) { |
| wStream->writeText("W* n\n"); |
| } else { |
| wStream->writeText("W n\n"); |
| } |
| } |
| // If Op() fails (pathological case; e.g. input values are |
| // extremely large or NaN), emit no clip at all. |
| } |
| |
| // TODO(vandebo): Take advantage of SkClipStack::getSaveCount(), the PDF |
| // graphic state stack, and the fact that we can know all the clips used |
| // on the page to optimize this. |
| void SkPDFDevice::GraphicStackState::updateClip(const SkClipStack* clipStack, |
| const SkIRect& bounds) { |
| uint32_t clipStackGenID = clipStack ? clipStack->getTopmostGenID() |
| : SkClipStack::kWideOpenGenID; |
| if (clipStackGenID == currentEntry()->fClipStackGenID) { |
| return; |
| } |
| |
| while (fStackDepth > 0) { |
| this->pop(); |
| if (clipStackGenID == currentEntry()->fClipStackGenID) { |
| return; |
| } |
| } |
| SkASSERT(currentEntry()->fClipStackGenID == SkClipStack::kWideOpenGenID); |
| if (clipStackGenID != SkClipStack::kWideOpenGenID) { |
| SkASSERT(clipStack); |
| this->push(); |
| |
| currentEntry()->fClipStackGenID = clipStackGenID; |
| append_clip(*clipStack, bounds, fContentStream); |
| } |
| } |
| |
| static void append_transform(const SkMatrix& matrix, SkWStream* content) { |
| SkScalar values[6]; |
| if (!matrix.asAffine(values)) { |
| SkMatrix::SetAffineIdentity(values); |
| } |
| for (SkScalar v : values) { |
| SkPDFUtils::AppendScalar(v, content); |
| content->writeText(" "); |
| } |
| content->writeText("cm\n"); |
| } |
| |
| void SkPDFDevice::GraphicStackState::updateMatrix(const SkMatrix& matrix) { |
| if (matrix == currentEntry()->fMatrix) { |
| return; |
| } |
| |
| if (currentEntry()->fMatrix.getType() != SkMatrix::kIdentity_Mask) { |
| SkASSERT(fStackDepth > 0); |
| SkASSERT(fEntries[fStackDepth].fClipStackGenID == |
| fEntries[fStackDepth -1].fClipStackGenID); |
| this->pop(); |
| |
| SkASSERT(currentEntry()->fMatrix.getType() == SkMatrix::kIdentity_Mask); |
| } |
| if (matrix.getType() == SkMatrix::kIdentity_Mask) { |
| return; |
| } |
| |
| this->push(); |
| append_transform(matrix, fContentStream); |
| currentEntry()->fMatrix = matrix; |
| } |
| |
| void SkPDFDevice::GraphicStackState::updateDrawingState(const SkPDFDevice::GraphicStateEntry& state) { |
| // PDF treats a shader as a color, so we only set one or the other. |
| if (state.fShaderIndex >= 0) { |
| if (state.fShaderIndex != currentEntry()->fShaderIndex) { |
| SkPDFUtils::ApplyPattern(state.fShaderIndex, fContentStream); |
| currentEntry()->fShaderIndex = state.fShaderIndex; |
| } |
| } else { |
| if (state.fColor != currentEntry()->fColor || |
| currentEntry()->fShaderIndex >= 0) { |
| emit_pdf_color(state.fColor, fContentStream); |
| fContentStream->writeText("RG "); |
| emit_pdf_color(state.fColor, fContentStream); |
| fContentStream->writeText("rg\n"); |
| currentEntry()->fColor = state.fColor; |
| currentEntry()->fShaderIndex = -1; |
| } |
| } |
| |
| if (state.fGraphicStateIndex != currentEntry()->fGraphicStateIndex) { |
| SkPDFUtils::ApplyGraphicState(state.fGraphicStateIndex, fContentStream); |
| currentEntry()->fGraphicStateIndex = state.fGraphicStateIndex; |
| } |
| |
| if (state.fTextScaleX) { |
| if (state.fTextScaleX != currentEntry()->fTextScaleX) { |
| SkScalar pdfScale = state.fTextScaleX * 100; |
| SkPDFUtils::AppendScalar(pdfScale, fContentStream); |
| fContentStream->writeText(" Tz\n"); |
| currentEntry()->fTextScaleX = state.fTextScaleX; |
| } |
| if (state.fTextFill != currentEntry()->fTextFill) { |
| static_assert(SkPaint::kFill_Style == 0, "enum_must_match_value"); |
| static_assert(SkPaint::kStroke_Style == 1, "enum_must_match_value"); |
| static_assert(SkPaint::kStrokeAndFill_Style == 2, "enum_must_match_value"); |
| fContentStream->writeDecAsText(state.fTextFill); |
| fContentStream->writeText(" Tr\n"); |
| currentEntry()->fTextFill = state.fTextFill; |
| } |
| } |
| } |
| |
| static bool not_supported_for_layers(const SkPaint& layerPaint) { |
| // PDF does not support image filters, so render them on CPU. |
| // Note that this rendering is done at "screen" resolution (100dpi), not |
| // printer resolution. |
| // TODO: It may be possible to express some filters natively using PDF |
| // to improve quality and file size (https://bug.skia.org/3043) |
| |
| // TODO: should we return true if there is a colorfilter? |
| return layerPaint.getImageFilter() != nullptr; |
| } |
| |
| SkBaseDevice* SkPDFDevice::onCreateDevice(const CreateInfo& cinfo, const SkPaint* layerPaint) { |
| if (layerPaint && not_supported_for_layers(*layerPaint)) { |
| // need to return a raster device, which we will detect in drawDevice() |
| return SkBitmapDevice::Create(cinfo.fInfo, SkSurfaceProps(0, kUnknown_SkPixelGeometry)); |
| } |
| return new SkPDFDevice(cinfo.fInfo.dimensions(), fDocument); |
| } |
| |
| SkPDFCanon* SkPDFDevice::getCanon() const { return fDocument->canon(); } |
| |
| // A helper class to automatically finish a ContentEntry at the end of a |
| // drawing method and maintain the state needed between set up and finish. |
| class ScopedContentEntry { |
| public: |
| ScopedContentEntry(SkPDFDevice* device, |
| const SkClipStack* clipStack, |
| const SkMatrix& matrix, |
| const SkPaint& paint, |
| bool hasText = false) |
| : fDevice(device) |
| , fBlendMode(SkBlendMode::kSrcOver) |
| , fClipStack(clipStack) |
| { |
| if (matrix.hasPerspective()) { |
| NOT_IMPLEMENTED(!matrix.hasPerspective(), false); |
| return; |
| } |
| fBlendMode = paint.getBlendMode(); |
| fContentStream = |
| fDevice->setUpContentEntry(clipStack, matrix, paint, hasText, &fDstFormXObject); |
| } |
| ScopedContentEntry(SkPDFDevice* dev, const SkPaint& paint, bool hasText = false) |
| : ScopedContentEntry(dev, &dev->cs(), dev->ctm(), paint, hasText) {} |
| |
| ~ScopedContentEntry() { |
| if (fContentStream) { |
| SkPath* shape = &fShape; |
| if (shape->isEmpty()) { |
| shape = nullptr; |
| } |
| fDevice->finishContentEntry(fClipStack, fBlendMode, std::move(fDstFormXObject), shape); |
| } |
| } |
| |
| explicit operator bool() const { return fContentStream != nullptr; } |
| SkDynamicMemoryWStream* stream() { return fContentStream; } |
| |
| /* Returns true when we explicitly need the shape of the drawing. */ |
| bool needShape() { |
| switch (fBlendMode) { |
| case SkBlendMode::kClear: |
| case SkBlendMode::kSrc: |
| case SkBlendMode::kSrcIn: |
| case SkBlendMode::kSrcOut: |
| case SkBlendMode::kDstIn: |
| case SkBlendMode::kDstOut: |
| case SkBlendMode::kSrcATop: |
| case SkBlendMode::kDstATop: |
| case SkBlendMode::kModulate: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| /* Returns true unless we only need the shape of the drawing. */ |
| bool needSource() { |
| if (fBlendMode == SkBlendMode::kClear) { |
| return false; |
| } |
| return true; |
| } |
| |
| /* If the shape is different than the alpha component of the content, then |
| * setShape should be called with the shape. In particular, images and |
| * devices have rectangular shape. |
| */ |
| void setShape(const SkPath& shape) { |
| fShape = shape; |
| } |
| |
| private: |
| SkPDFDevice* fDevice = nullptr; |
| SkDynamicMemoryWStream* fContentStream = nullptr; |
| SkBlendMode fBlendMode; |
| sk_sp<SkPDFObject> fDstFormXObject; |
| SkPath fShape; |
| const SkClipStack* fClipStack; |
| }; |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| SkPDFDevice::SkPDFDevice(SkISize pageSize, SkPDFDocument* doc, const SkMatrix& transform) |
| : INHERITED(SkImageInfo::MakeUnknown(pageSize.width(), pageSize.height()), |
| SkSurfaceProps(0, kUnknown_SkPixelGeometry)) |
| , fInitialTransform(transform) |
| , fNodeId(0) |
| , fDocument(doc) |
| { |
| SkASSERT(!pageSize.isEmpty()); |
| } |
| |
| SkPDFDevice::~SkPDFDevice() = default; |
| |
| void SkPDFDevice::reset() { |
| fLinkToURLs = std::vector<RectWithData>(); |
| fLinkToDestinations = std::vector<RectWithData>(); |
| fNamedDestinations = std::vector<NamedDestination>(); |
| fGraphicStateResources = std::vector<sk_sp<SkPDFObject>>(); |
| fXObjectResources = std::vector<sk_sp<SkPDFObject>>(); |
| fShaderResources = std::vector<sk_sp<SkPDFObject>>(); |
| fFontResources = std::vector<sk_sp<SkPDFFont>>(); |
| fContent.reset(); |
| fActiveStackState = GraphicStackState(); |
| } |
| |
| void SkPDFDevice::drawAnnotation(const SkRect& rect, const char key[], SkData* value) { |
| if (!value) { |
| return; |
| } |
| if (rect.isEmpty()) { |
| if (!strcmp(key, SkPDFGetNodeIdKey())) { |
| int nodeID; |
| if (value->size() != sizeof(nodeID)) { return; } |
| memcpy(&nodeID, value->data(), sizeof(nodeID)); |
| fNodeId = nodeID; |
| return; |
| } |
| if (!strcmp(SkAnnotationKeys::Define_Named_Dest_Key(), key)) { |
| SkPoint transformedPoint; |
| this->ctm().mapXY(rect.x(), rect.y(), &transformedPoint); |
| fNamedDestinations.emplace_back(NamedDestination{sk_ref_sp(value), transformedPoint}); |
| } |
| return; |
| } |
| // Convert to path to handle non-90-degree rotations. |
| SkPath path = to_path(rect); |
| path.transform(this->ctm(), &path); |
| SkPath clip; |
| (void)this->cs().asPath(&clip); |
| Op(clip, path, kIntersect_SkPathOp, &path); |
| // PDF wants a rectangle only. |
| SkRect transformedRect = path.getBounds(); |
| if (transformedRect.isEmpty()) { |
| return; |
| } |
| if (!strcmp(SkAnnotationKeys::URL_Key(), key)) { |
| fLinkToURLs.emplace_back(RectWithData{transformedRect, sk_ref_sp(value)}); |
| } else if (!strcmp(SkAnnotationKeys::Link_Named_Dest_Key(), key)) { |
| fLinkToDestinations.emplace_back(RectWithData{transformedRect, sk_ref_sp(value)}); |
| } |
| } |
| |
| void SkPDFDevice::drawPaint(const SkPaint& srcPaint) { |
| SkMatrix inverse; |
| if (!this->ctm().invert(&inverse)) { |
| return; |
| } |
| SkRect bbox = this->cs().bounds(this->bounds()); |
| inverse.mapRect(&bbox); |
| bbox.roundOut(&bbox); |
| if (this->hasEmptyClip()) { |
| return; |
| } |
| SkPaint newPaint = srcPaint; |
| newPaint.setStyle(SkPaint::kFill_Style); |
| this->drawRect(bbox, newPaint); |
| } |
| |
| void SkPDFDevice::drawPoints(SkCanvas::PointMode mode, |
| size_t count, |
| const SkPoint* points, |
| const SkPaint& srcPaint) { |
| if (this->hasEmptyClip()) { |
| return; |
| } |
| SkPaint passedPaint = srcPaint; |
| remove_color_filter(&passedPaint); |
| replace_srcmode_on_opaque_paint(&passedPaint); |
| if (SkCanvas::kPoints_PointMode != mode) { |
| passedPaint.setStyle(SkPaint::kStroke_Style); |
| } |
| if (count == 0) { |
| return; |
| } |
| |
| // SkDraw::drawPoints converts to multiple calls to fDevice->drawPath. |
| // We only use this when there's a path effect because of the overhead |
| // of multiple calls to setUpContentEntry it causes. |
| if (passedPaint.getPathEffect()) { |
| draw_points(mode, count, points, passedPaint, |
| this->devClipBounds(), this->ctm(), this); |
| return; |
| } |
| |
| const SkPaint* paint = &passedPaint; |
| SkPaint modifiedPaint; |
| |
| if (mode == SkCanvas::kPoints_PointMode && |
| paint->getStrokeCap() != SkPaint::kRound_Cap) { |
| modifiedPaint = *paint; |
| paint = &modifiedPaint; |
| if (paint->getStrokeWidth()) { |
| // PDF won't draw a single point with square/butt caps because the |
| // orientation is ambiguous. Draw a rectangle instead. |
| modifiedPaint.setStyle(SkPaint::kFill_Style); |
| SkScalar strokeWidth = paint->getStrokeWidth(); |
| SkScalar halfStroke = SkScalarHalf(strokeWidth); |
| for (size_t i = 0; i < count; i++) { |
| SkRect r = SkRect::MakeXYWH(points[i].fX, points[i].fY, 0, 0); |
| r.inset(-halfStroke, -halfStroke); |
| this->drawRect(r, modifiedPaint); |
| } |
| return; |
| } else { |
| modifiedPaint.setStrokeCap(SkPaint::kRound_Cap); |
| } |
| } |
| |
| ScopedContentEntry content(this, *paint); |
| if (!content) { |
| return; |
| } |
| SkDynamicMemoryWStream* contentStream = content.stream(); |
| switch (mode) { |
| case SkCanvas::kPolygon_PointMode: |
| SkPDFUtils::MoveTo(points[0].fX, points[0].fY, contentStream); |
| for (size_t i = 1; i < count; i++) { |
| SkPDFUtils::AppendLine(points[i].fX, points[i].fY, contentStream); |
| } |
| SkPDFUtils::StrokePath(contentStream); |
| break; |
| case SkCanvas::kLines_PointMode: |
| for (size_t i = 0; i < count/2; i++) { |
| SkPDFUtils::MoveTo(points[i * 2].fX, points[i * 2].fY, contentStream); |
| SkPDFUtils::AppendLine(points[i * 2 + 1].fX, points[i * 2 + 1].fY, contentStream); |
| SkPDFUtils::StrokePath(contentStream); |
| } |
| break; |
| case SkCanvas::kPoints_PointMode: |
| SkASSERT(paint->getStrokeCap() == SkPaint::kRound_Cap); |
| for (size_t i = 0; i < count; i++) { |
| SkPDFUtils::MoveTo(points[i].fX, points[i].fY, contentStream); |
| SkPDFUtils::ClosePath(contentStream); |
| SkPDFUtils::StrokePath(contentStream); |
| } |
| break; |
| default: |
| SkASSERT(false); |
| } |
| } |
| |
| static sk_sp<SkPDFDict> create_link_annotation(const SkRect& translatedRect) { |
| auto annotation = sk_make_sp<SkPDFDict>("Annot"); |
| annotation->insertName("Subtype", "Link"); |
| annotation->insertInt("F", 4); // required by ISO 19005 |
| // Border: 0 = Horizontal corner radius. |
| // 0 = Vertical corner radius. |
| // 0 = Width, 0 = no border. |
| annotation->insertObject("Border", SkPDFMakeArray(0, 0, 0)); |
| |
| annotation->insertObject("Rect", SkPDFMakeArray(translatedRect.fLeft, |
| translatedRect.fTop, |
| translatedRect.fRight, |
| translatedRect.fBottom)); |
| return annotation; |
| } |
| |
| static sk_sp<SkPDFDict> create_link_to_url(const SkData* urlData, const SkRect& r) { |
| sk_sp<SkPDFDict> annotation = create_link_annotation(r); |
| SkString url(static_cast<const char *>(urlData->data()), |
| urlData->size() - 1); |
| auto action = sk_make_sp<SkPDFDict>("Action"); |
| action->insertName("S", "URI"); |
| action->insertString("URI", url); |
| annotation->insertObject("A", std::move(action)); |
| return annotation; |
| } |
| |
| static sk_sp<SkPDFDict> create_link_named_dest(const SkData* nameData, |
| const SkRect& r) { |
| sk_sp<SkPDFDict> annotation = create_link_annotation(r); |
| SkString name(static_cast<const char *>(nameData->data()), |
| nameData->size() - 1); |
| annotation->insertName("Dest", name); |
| return annotation; |
| } |
| |
| void SkPDFDevice::drawRect(const SkRect& rect, |
| const SkPaint& srcPaint) { |
| if (this->hasEmptyClip()) { |
| return; |
| } |
| SkPaint paint = srcPaint; |
| remove_color_filter(&paint); |
| replace_srcmode_on_opaque_paint(&paint); |
| SkRect r = rect; |
| r.sort(); |
| |
| if (paint.getPathEffect() || paint.getMaskFilter() || this->ctm().hasPerspective()) { |
| this->drawPath(to_path(r), paint, true); |
| return; |
| } |
| |
| ScopedContentEntry content(this, paint); |
| if (!content) { |
| return; |
| } |
| SkPDFUtils::AppendRectangle(r, content.stream()); |
| SkPDFUtils::PaintPath(paint.getStyle(), SkPath::kWinding_FillType, content.stream()); |
| } |
| |
| void SkPDFDevice::drawRRect(const SkRRect& rrect, |
| const SkPaint& srcPaint) { |
| if (this->hasEmptyClip()) { |
| return; |
| } |
| SkPaint paint = srcPaint; |
| remove_color_filter(&paint); |
| replace_srcmode_on_opaque_paint(&paint); |
| SkPath path; |
| path.addRRect(rrect); |
| this->drawPath(path, paint, true); |
| } |
| |
| void SkPDFDevice::drawOval(const SkRect& oval, |
| const SkPaint& srcPaint) { |
| if (this->hasEmptyClip()) { |
| return; |
| } |
| SkPaint paint = srcPaint; |
| remove_color_filter(&paint); |
| replace_srcmode_on_opaque_paint(&paint); |
| SkPath path; |
| path.addOval(oval); |
| this->drawPath(path, paint, true); |
| } |
| |
| void SkPDFDevice::drawPath(const SkPath& origPath, |
| const SkPaint& srcPaint, |
| bool pathIsMutable) { |
| this->internalDrawPath(this->cs(), this->ctm(), origPath, srcPaint, pathIsMutable); |
| } |
| |
| void SkPDFDevice::internalDrawPathWithFilter(const SkClipStack& clipStack, |
| const SkMatrix& ctm, |
| const SkPath& origPath, |
| const SkPaint& origPaint) { |
| SkASSERT(origPaint.getMaskFilter()); |
| SkPath path(origPath); |
| SkTCopyOnFirstWrite<SkPaint> paint(origPaint); |
| |
| SkStrokeRec::InitStyle initStyle = paint->getFillPath(path, &path) |
| ? SkStrokeRec::kFill_InitStyle |
| : SkStrokeRec::kHairline_InitStyle; |
| path.transform(ctm, &path); |
| |
| SkIRect bounds = clipStack.bounds(this->bounds()).roundOut(); |
| SkMask sourceMask; |
| if (!SkDraw::DrawToMask(path, &bounds, paint->getMaskFilter(), &SkMatrix::I(), |
| &sourceMask, SkMask::kComputeBoundsAndRenderImage_CreateMode, |
| initStyle)) { |
| return; |
| } |
| SkAutoMaskFreeImage srcAutoMaskFreeImage(sourceMask.fImage); |
| SkMask dstMask; |
| SkIPoint margin; |
| if (!as_MFB(paint->getMaskFilter())->filterMask(&dstMask, sourceMask, ctm, &margin)) { |
| return; |
| } |
| SkIRect dstMaskBounds = dstMask.fBounds; |
| sk_sp<SkImage> mask = mask_to_greyscale_image(&dstMask); |
| // PDF doesn't seem to allow masking vector graphics with an Image XObject. |
| // Must mask with a Form XObject. |
| sk_sp<SkPDFDevice> maskDevice = this->makeCongruentDevice(); |
| { |
| SkCanvas canvas(maskDevice); |
| canvas.drawImage(mask, dstMaskBounds.x(), dstMaskBounds.y()); |
| } |
| if (!ctm.isIdentity() && paint->getShader()) { |
| transform_shader(paint.writable(), ctm); // Since we are using identity matrix. |
| } |
| ScopedContentEntry content(this, &clipStack, SkMatrix::I(), *paint); |
| if (!content) { |
| return; |
| } |
| this->addSMaskGraphicState(std::move(maskDevice), content.stream()); |
| SkPDFUtils::AppendRectangle(SkRect::Make(dstMaskBounds), content.stream()); |
| SkPDFUtils::PaintPath(SkPaint::kFill_Style, path.getFillType(), content.stream()); |
| this->clearMaskOnGraphicState(content.stream()); |
| } |
| |
| template <typename T, |
| typename U, |
| typename = typename std::enable_if<std::is_convertible<U*, T*>::value>::type> |
| static int find_or_add(std::vector<sk_sp<T>>* vec, sk_sp<U> object) { |
| SkASSERT(vec); |
| SkASSERT(object); |
| for (size_t i = 0; i < vec->size(); ++i) { |
| if ((*vec)[i].get() == object.get()) { |
| return SkToInt(i); |
| } |
| } |
| int index = SkToInt(vec->size()); |
| vec->push_back(sk_sp<T>(std::move(object))); |
| return index; |
| } |
| |
| void SkPDFDevice::setGraphicState(sk_sp<SkPDFObject> gs, SkDynamicMemoryWStream* content) { |
| SkPDFUtils::ApplyGraphicState(find_or_add(&fGraphicStateResources, std::move(gs)), content); |
| } |
| |
| void SkPDFDevice::addSMaskGraphicState(sk_sp<SkPDFDevice> maskDevice, |
| SkDynamicMemoryWStream* contentStream) { |
| this->setGraphicState(SkPDFGraphicState::GetSMaskGraphicState( |
| maskDevice->makeFormXObjectFromDevice(true), false, |
| SkPDFGraphicState::kLuminosity_SMaskMode, this->getCanon()), contentStream); |
| } |
| |
| void SkPDFDevice::clearMaskOnGraphicState(SkDynamicMemoryWStream* contentStream) { |
| // The no-softmask graphic state is used to "turn off" the mask for later draw calls. |
| sk_sp<SkPDFDict>& noSMaskGS = this->getCanon()->fNoSmaskGraphicState; |
| if (!noSMaskGS) { |
| noSMaskGS = sk_make_sp<SkPDFDict>("ExtGState"); |
| noSMaskGS->insertName("SMask", "None"); |
| } |
| this->setGraphicState(noSMaskGS, contentStream); |
| } |
| |
| void SkPDFDevice::internalDrawPath(const SkClipStack& clipStack, |
| const SkMatrix& ctm, |
| const SkPath& origPath, |
| const SkPaint& srcPaint, |
| bool pathIsMutable) { |
| if (clipStack.isEmpty(this->bounds())) { |
| return; |
| } |
| SkPaint paint = srcPaint; |
| remove_color_filter(&paint); |
| replace_srcmode_on_opaque_paint(&paint); |
| SkPath modifiedPath; |
| SkPath* pathPtr = const_cast<SkPath*>(&origPath); |
| |
| if (paint.getMaskFilter()) { |
| this->internalDrawPathWithFilter(clipStack, ctm, origPath, paint); |
| return; |
| } |
| |
| SkMatrix matrix = ctm; |
| |
| if (paint.getPathEffect()) { |
| if (clipStack.isEmpty(this->bounds())) { |
| return; |
| } |
| if (!pathIsMutable) { |
| modifiedPath = origPath; |
| pathPtr = &modifiedPath; |
| pathIsMutable = true; |
| } |
| if (paint.getFillPath(*pathPtr, pathPtr)) { |
| paint.setStyle(SkPaint::kFill_Style); |
| } else { |
| paint.setStyle(SkPaint::kStroke_Style); |
| paint.setStrokeWidth(0); |
| } |
| paint.setPathEffect(nullptr); |
| } |
| |
| if (this->handleInversePath(*pathPtr, paint, pathIsMutable)) { |
| return; |
| } |
| if (matrix.getType() & SkMatrix::kPerspective_Mask) { |
| if (!pathIsMutable) { |
| modifiedPath = origPath; |
| pathPtr = &modifiedPath; |
| pathIsMutable = true; |
| } |
| pathPtr->transform(matrix); |
| if (paint.getShader()) { |
| transform_shader(&paint, matrix); |
| } |
| matrix = SkMatrix::I(); |
| } |
| |
| ScopedContentEntry content(this, &clipStack, matrix, paint); |
| if (!content) { |
| return; |
| } |
| constexpr SkScalar kToleranceScale = 0.0625f; // smaller = better conics (circles). |
| SkScalar matrixScale = matrix.mapRadius(1.0f); |
| SkScalar tolerance = matrixScale > 0.0f ? kToleranceScale / matrixScale : kToleranceScale; |
| bool consumeDegeratePathSegments = |
| paint.getStyle() == SkPaint::kFill_Style || |
| (paint.getStrokeCap() != SkPaint::kRound_Cap && |
| paint.getStrokeCap() != SkPaint::kSquare_Cap); |
| SkPDFUtils::EmitPath(*pathPtr, paint.getStyle(), consumeDegeratePathSegments, content.stream(), |
| tolerance); |
| SkPDFUtils::PaintPath(paint.getStyle(), pathPtr->getFillType(), content.stream()); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| void SkPDFDevice::drawImageRect(const SkImage* image, |
| const SkRect* src, |
| const SkRect& dst, |
| const SkPaint& paint, |
| SkCanvas::SrcRectConstraint) { |
| SkASSERT(image); |
| this->internalDrawImageRect(SkKeyedImage(sk_ref_sp(const_cast<SkImage*>(image))), |
| src, dst, paint, this->ctm()); |
| } |
| |
| void SkPDFDevice::drawBitmapRect(const SkBitmap& bm, |
| const SkRect* src, |
| const SkRect& dst, |
| const SkPaint& paint, |
| SkCanvas::SrcRectConstraint) { |
| SkASSERT(!bm.drawsNothing()); |
| this->internalDrawImageRect(SkKeyedImage(bm), src, dst, paint, this->ctm()); |
| } |
| |
| void SkPDFDevice::drawBitmap(const SkBitmap& bm, SkScalar x, SkScalar y, const SkPaint& paint) { |
| SkASSERT(!bm.drawsNothing()); |
| auto r = SkRect::MakeXYWH(x, y, bm.width(), bm.height()); |
| this->internalDrawImageRect(SkKeyedImage(bm), nullptr, r, paint, this->ctm()); |
| } |
| |
| void SkPDFDevice::drawSprite(const SkBitmap& bm, int x, int y, const SkPaint& paint) { |
| SkASSERT(!bm.drawsNothing()); |
| auto r = SkRect::MakeXYWH(x, y, bm.width(), bm.height()); |
| this->internalDrawImageRect(SkKeyedImage(bm), nullptr, r, paint, SkMatrix::I()); |
| } |
| |
| void SkPDFDevice::drawImage(const SkImage* image, SkScalar x, SkScalar y, const SkPaint& paint) { |
| SkASSERT(image); |
| auto r = SkRect::MakeXYWH(x, y, image->width(), image->height()); |
| this->internalDrawImageRect(SkKeyedImage(sk_ref_sp(const_cast<SkImage*>(image))), |
| nullptr, r, paint, this->ctm()); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| namespace { |
| class GlyphPositioner { |
| public: |
| GlyphPositioner(SkDynamicMemoryWStream* content, |
| SkScalar textSkewX, |
| SkPoint origin) |
| : fContent(content) |
| , fCurrentMatrixOrigin(origin) |
| , fTextSkewX(textSkewX) { |
| } |
| ~GlyphPositioner() { this->flush(); } |
| void flush() { |
| if (fInText) { |
| fContent->writeText("> Tj\n"); |
| fInText = false; |
| } |
| } |
| void setWideChars(bool wide) { |
| this->flush(); |
| fWideChars = wide; |
| } |
| void writeGlyph(SkPoint xy, |
| SkScalar advanceWidth, |
| uint16_t glyph) { |
| if (!fInitialized) { |
| // Flip the text about the x-axis to account for origin swap and include |
| // the passed parameters. |
| fContent->writeText("1 0 "); |
| SkPDFUtils::AppendScalar(-fTextSkewX, fContent); |
| fContent->writeText(" -1 "); |
| SkPDFUtils::AppendScalar(fCurrentMatrixOrigin.x(), fContent); |
| fContent->writeText(" "); |
| SkPDFUtils::AppendScalar(fCurrentMatrixOrigin.y(), fContent); |
| fContent->writeText(" Tm\n"); |
| fCurrentMatrixOrigin.set(0.0f, 0.0f); |
| fInitialized = true; |
| } |
| SkPoint position = xy - fCurrentMatrixOrigin; |
| if (position != SkPoint{fXAdvance, 0}) { |
| this->flush(); |
| SkPDFUtils::AppendScalar(position.x() - position.y() * fTextSkewX, fContent); |
| fContent->writeText(" "); |
| SkPDFUtils::AppendScalar(-position.y(), fContent); |
| fContent->writeText(" Td "); |
| fCurrentMatrixOrigin = xy; |
| fXAdvance = 0; |
| } |
| fXAdvance += advanceWidth; |
| if (!fInText) { |
| fContent->writeText("<"); |
| fInText = true; |
| } |
| if (fWideChars) { |
| SkPDFUtils::WriteUInt16BE(fContent, glyph); |
| } else { |
| SkASSERT(0 == glyph >> 8); |
| SkPDFUtils::WriteUInt8(fContent, static_cast<uint8_t>(glyph)); |
| } |
| } |
| |
| private: |
| SkDynamicMemoryWStream* fContent; |
| SkPoint fCurrentMatrixOrigin; |
| SkScalar fXAdvance = 0.0f; |
| SkScalar fTextSkewX; |
| bool fWideChars = true; |
| bool fInText = false; |
| bool fInitialized = false; |
| }; |
| } // namespace |
| |
| static SkUnichar map_glyph(const std::vector<SkUnichar>& glyphToUnicode, SkGlyphID glyph) { |
| return glyph < glyphToUnicode.size() ? glyphToUnicode[SkToInt(glyph)] : -1; |
| } |
| |
| namespace { |
| struct PositionedGlyph { |
| SkPoint fPos; |
| SkGlyphID fGlyph; |
| }; |
| } |
| |
| static SkRect get_glyph_bounds_device_space(SkGlyphID gid, SkGlyphCache* cache, |
| SkScalar xScale, SkScalar yScale, |
| SkPoint xy, const SkMatrix& ctm) { |
| const SkGlyph& glyph = cache->getGlyphIDMetrics(gid); |
| SkRect glyphBounds = {glyph.fLeft * xScale, |
| glyph.fTop * yScale, |
| (glyph.fLeft + glyph.fWidth) * xScale, |
| (glyph.fTop + glyph.fHeight) * yScale}; |
| glyphBounds.offset(xy); |
| ctm.mapRect(&glyphBounds); // now in dev space. |
| return glyphBounds; |
| } |
| |
| static bool contains(const SkRect& r, SkPoint p) { |
| return r.left() <= p.x() && p.x() <= r.right() && |
| r.top() <= p.y() && p.y() <= r.bottom(); |
| } |
| |
| void SkPDFDevice::drawGlyphRunAsPath(const SkGlyphRun& glyphRun, SkPoint offset) { |
| SkPaint paint{glyphRun.paint()}; |
| paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding); |
| paint.setTextAlign(SkPaint::kLeft_Align); |
| SkPath path; |
| SkASSERT(paint.getTextEncoding() == SkPaint::kGlyphID_TextEncoding); |
| |
| paint.getPosTextPath(glyphRun.shuntGlyphsIDs().data(), |
| glyphRun.shuntGlyphsIDs().size() * sizeof(SkGlyphID), |
| glyphRun.positions().data(), |
| &path); |
| path.offset(offset.x(), offset.y()); |
| this->drawPath(path, paint, true); |
| |
| SkGlyphRun tmp(glyphRun); |
| { |
| SkPaint transparent; |
| transparent.setTypeface(paint.getTypeface() ? paint.refTypeface() |
| : SkTypeface::MakeDefault()); |
| transparent.setTextEncoding(SkPaint::kGlyphID_TextEncoding); |
| transparent.setColor(SK_ColorTRANSPARENT); |
| transparent.setTextSize(paint.getTextSize()); |
| transparent.setTextAlign(paint.getTextAlign()); |
| transparent.setTextScaleX(paint.getTextScaleX()); |
| transparent.setTextSkewX(paint.getTextSkewX()); |
| *tmp.mutablePaint() = std::move(transparent); |
| } |
| if (this->ctm().hasPerspective()) { |
| SkMatrix prevCTM = this->ctm(); |
| this->setCTM(SkMatrix::I()); |
| this->internalDrawGlyphRun(tmp, offset); |
| this->setCTM(prevCTM); |
| } else { |
| this->internalDrawGlyphRun(tmp, offset); |
| } |
| } |
| |
| void SkPDFDevice::internalDrawGlyphRun(const SkGlyphRun& glyphRun, SkPoint offset) { |
| |
| const SkGlyphID* glyphs = glyphRun.shuntGlyphsIDs().data(); |
| uint32_t glyphCount = SkToU32(glyphRun.shuntGlyphsIDs().size()); |
| SkPaint srcPaint{glyphRun.paint()}; |
| srcPaint.setTextEncoding(SkPaint::kGlyphID_TextEncoding); |
| srcPaint.setTextAlign(SkPaint::kLeft_Align); |
| |
| if (!glyphCount || !glyphs || srcPaint.getTextSize() <= 0 || this->hasEmptyClip()) { |
| return; |
| } |
| if (srcPaint.getPathEffect() |
| || srcPaint.getMaskFilter() |
| || srcPaint.isVerticalText() |
| || srcPaint.isFakeBoldText() |
| || this->ctm().hasPerspective() |
| || SkPaint::kFill_Style != srcPaint.getStyle()) { |
| // Stroked Text doesn't work well with Type3 fonts. |
| this->drawGlyphRunAsPath(glyphRun, offset); |
| } |
| SkPaint paint(srcPaint); |
| remove_color_filter(&paint); |
| replace_srcmode_on_opaque_paint(&paint); |
| paint.setHinting(SkPaint::kNo_Hinting); |
| if (!paint.getTypeface()) { |
| paint.setTypeface(SkTypeface::MakeDefault()); |
| } |
| SkTypeface* typeface = paint.getTypeface(); |
| if (!typeface) { |
| SkDebugf("SkPDF: SkTypeface::MakeDefault() returned nullptr.\n"); |
| return; |
| } |
| const SkAdvancedTypefaceMetrics* metrics = SkPDFFont::GetMetrics(typeface, fDocument->canon()); |
| if (!metrics) { |
| return; |
| } |
| const std::vector<SkUnichar>& glyphToUnicode = SkPDFFont::GetUnicodeMap( |
| typeface, fDocument->canon()); |
| |
| SkClusterator clusterator(glyphRun); |
| |
| int emSize; |
| auto glyphCache = SkPDFFont::MakeVectorCache(typeface, &emSize); |
| |
| SkScalar textSize = paint.getTextSize(); |
| SkScalar advanceScale = textSize * paint.getTextScaleX() / emSize; |
| |
| // textScaleX and textScaleY are used to get a conservative bounding box for glyphs. |
| SkScalar textScaleY = textSize / emSize; |
| SkScalar textScaleX = advanceScale + paint.getTextSkewX() * textScaleY; |
| |
| SkASSERT(paint.getTextAlign() == SkPaint::kLeft_Align); |
| SkRect clipStackBounds = this->cs().bounds(this->bounds()); |
| { |
| ScopedContentEntry content(this, paint, true); |
| if (!content) { |
| return; |
| } |
| SkDynamicMemoryWStream* out = content.stream(); |
| |
| out->writeText("BT\n"); |
| |
| int markId = -1; |
| if (fNodeId) { |
| markId = fDocument->getMarkIdForNodeId(fNodeId); |
| } |
| |
| if (markId != -1) { |
| out->writeText("/P <</MCID "); |
| out->writeDecAsText(markId); |
| out->writeText(" >>BDC\n"); |
| } |
| SK_AT_SCOPE_EXIT(if (markId != -1) out->writeText("EMC\n")); |
| |
| SK_AT_SCOPE_EXIT(out->writeText("ET\n")); |
| |
| const SkGlyphID maxGlyphID = SkToU16(typeface->countGlyphs() - 1); |
| |
| if (clusterator.reversedChars()) { |
| out->writeText("/ReversedChars BMC\n"); |
| } |
| SK_AT_SCOPE_EXIT(if (clusterator.reversedChars()) { out->writeText("EMC\n"); } ); |
| GlyphPositioner glyphPositioner(out, paint.getTextSkewX(), offset); |
| SkPDFFont* font = nullptr; |
| |
| while (SkClusterator::Cluster c = clusterator.next()) { |
| int index = c.fGlyphIndex; |
| int glyphLimit = index + c.fGlyphCount; |
| |
| bool actualText = false; |
| SK_AT_SCOPE_EXIT(if (actualText) { |
| glyphPositioner.flush(); |
| out->writeText("EMC\n"); |
| }); |
| if (c.fUtf8Text) { // real cluster |
| // Check if `/ActualText` needed. |
| const char* textPtr = c.fUtf8Text; |
| const char* textEnd = c.fUtf8Text + c.fTextByteLength; |
| SkUnichar unichar = SkUTF::NextUTF8(&textPtr, textEnd); |
| if (unichar < 0) { |
| return; |
| } |
| if (textPtr < textEnd || // more characters left |
| glyphLimit > index + 1 || // toUnicode wouldn't work |
| unichar != map_glyph(glyphToUnicode, glyphs[index])) // test single Unichar map |
| { |
| glyphPositioner.flush(); |
| out->writeText("/Span<</ActualText <"); |
| SkPDFUtils::WriteUTF16beHex(out, 0xFEFF); // U+FEFF = BYTE ORDER MARK |
| // the BOM marks this text as UTF-16BE, not PDFDocEncoding. |
| SkPDFUtils::WriteUTF16beHex(out, unichar); // first char |
| while (textPtr < textEnd) { |
| unichar = SkUTF::NextUTF8(&textPtr, textEnd); |
| if (unichar < 0) { |
| break; |
| } |
| SkPDFUtils::WriteUTF16beHex(out, unichar); |
| } |
| out->writeText("> >> BDC\n"); // begin marked-content sequence |
| // with an associated property list. |
| actualText = true; |
| } |
| } |
| for (; index < glyphLimit; ++index) { |
| SkGlyphID gid = glyphs[index]; |
| if (gid > maxGlyphID) { |
| continue; |
| } |
| if (!font || !font->hasGlyph(gid)) { |
| // Not yet specified font or need to switch font. |
| sk_sp<SkPDFFont> newFont = |
| SkPDFFont::GetFontResource( |
| fDocument->canon(), glyphCache.get(), typeface, gid); |
| SkASSERT(newFont); // All preconditions for SkPDFFont::GetFontResource are met. |
| if (!newFont) { |
| return; |
| } |
| font = newFont.get(); |
| fDocument->registerFont(font); |
| int fontIndex = find_or_add(&fFontResources, std::move(newFont)); |
| |
| glyphPositioner.flush(); |
| glyphPositioner.setWideChars(font->multiByteGlyphs()); |
| SkPDFWriteResourceName(out, SkPDFResourceType::kFont, fontIndex); |
| out->writeText(" "); |
| SkPDFUtils::AppendScalar(textSize, out); |
| out->writeText(" Tf\n"); |
| |
| } |
| SkPoint xy = glyphRun.positions()[index]; |
| // Do a glyph-by-glyph bounds-reject if positions are absolute. |
| SkRect glyphBounds = get_glyph_bounds_device_space( |
| gid, glyphCache.get(), textScaleX, textScaleY, |
| xy + offset, this->ctm()); |
| if (glyphBounds.isEmpty()) { |
| if (!contains(clipStackBounds, {glyphBounds.x(), glyphBounds.y()})) { |
| continue; |
| } |
| } else { |
| if (!clipStackBounds.intersects(glyphBounds)) { |
| continue; // reject glyphs as out of bounds |
| } |
| } |
| font->noteGlyphUsage(gid); |
| |
| SkGlyphID encodedGlyph = font->multiByteGlyphs() |
| ? gid : font->glyphToPDFFontEncoding(gid); |
| SkScalar advance = advanceScale * glyphCache->getGlyphIDAdvance(gid).fAdvanceX; |
| glyphPositioner.writeGlyph(xy, advance, encodedGlyph); |
| } |
| } |
| } |
| } |
| |
| void SkPDFDevice::drawGlyphRunList(const SkGlyphRunList& glyphRunList) { |
| for (const SkGlyphRun& glyphRun : glyphRunList) { |
| this->internalDrawGlyphRun(glyphRun, glyphRunList.origin()); |
| } |
| } |
| |
| void SkPDFDevice::drawVertices(const SkVertices*, const SkVertices::Bone[], int, SkBlendMode, |
| const SkPaint&) { |
| if (this->hasEmptyClip()) { |
| return; |
| } |
| // TODO: implement drawVertices |
| } |
| |
| void SkPDFDevice::drawFormXObject(sk_sp<SkPDFObject> xObject, SkDynamicMemoryWStream* content) { |
| SkPDFWriteResourceName(content, SkPDFResourceType::kXObject, |
| find_or_add(&fXObjectResources, std::move(xObject))); |
| content->writeText(" Do\n"); |
| } |
| |
| void SkPDFDevice::drawDevice(SkBaseDevice* device, int x, int y, const SkPaint& paint) { |
| SkASSERT(!paint.getImageFilter()); |
| |
| // Check if the source device is really a bitmapdevice (because that's what we returned |
| // from createDevice (likely due to an imagefilter) |
| SkPixmap pmap; |
| if (device->peekPixels(&pmap)) { |
| SkBitmap bitmap; |
| bitmap.installPixels(pmap); |
| this->drawSprite(bitmap, x, y, paint); |
| return; |
| } |
| |
| // our onCreateCompatibleDevice() always creates SkPDFDevice subclasses. |
| SkPDFDevice* pdfDevice = static_cast<SkPDFDevice*>(device); |
| |
| SkScalar scalarX = SkIntToScalar(x); |
| SkScalar scalarY = SkIntToScalar(y); |
| for (const RectWithData& l : pdfDevice->fLinkToURLs) { |
| SkRect r = l.rect.makeOffset(scalarX, scalarY); |
| fLinkToURLs.emplace_back(RectWithData{r, l.data}); |
| } |
| for (const RectWithData& l : pdfDevice->fLinkToDestinations) { |
| SkRect r = l.rect.makeOffset(scalarX, scalarY); |
| fLinkToDestinations.emplace_back(RectWithData{r, l.data}); |
| } |
| for (const NamedDestination& d : pdfDevice->fNamedDestinations) { |
| SkPoint p = d.point + SkPoint::Make(scalarX, scalarY); |
| fNamedDestinations.emplace_back(NamedDestination{d.nameData, p}); |
| } |
| |
| if (pdfDevice->isContentEmpty()) { |
| return; |
| } |
| |
| SkMatrix matrix = SkMatrix::MakeTrans(SkIntToScalar(x), SkIntToScalar(y)); |
| ScopedContentEntry content(this, &this->cs(), matrix, paint); |
| if (!content) { |
| return; |
| } |
| if (content.needShape()) { |
| SkISize dim = device->imageInfo().dimensions(); |
| content.setShape(to_path(SkRect::Make(SkIRect::MakeXYWH(x, y, dim.width(), dim.height())))); |
| } |
| if (!content.needSource()) { |
| return; |
| } |
| this->drawFormXObject(pdfDevice->makeFormXObjectFromDevice(), content.stream()); |
| } |
| |
| sk_sp<SkSurface> SkPDFDevice::makeSurface(const SkImageInfo& info, const SkSurfaceProps& props) { |
| return SkSurface::MakeRaster(info, &props); |
| } |
| |
| |
| sk_sp<SkPDFDict> SkPDFDevice::makeResourceDict() { |
| return SkPDFMakeResourceDict(std::move(fGraphicStateResources), |
| std::move(fShaderResources), |
| std::move(fXObjectResources), |
| std::move(fFontResources)); |
| } |
| |
| std::unique_ptr<SkStreamAsset> SkPDFDevice::content() { |
| if (fActiveStackState.fContentStream) { |
| fActiveStackState.drainStack(); |
| fActiveStackState = GraphicStackState(); |
| } |
| if (fContent.bytesWritten() == 0) { |
| return skstd::make_unique<SkMemoryStream>(); |
| } |
| SkDynamicMemoryWStream buffer; |
| if (fInitialTransform.getType() != SkMatrix::kIdentity_Mask) { |
| append_transform(fInitialTransform, &buffer); |
| } |
| if (fNeedsExtraSave) { |
| buffer.writeText("q\n"); |
| } |
| fContent.writeToAndReset(&buffer); |
| if (fNeedsExtraSave) { |
| buffer.writeText("Q\n"); |
| } |
| fNeedsExtraSave = false; |
| return std::unique_ptr<SkStreamAsset>(buffer.detachAsStream()); |
| } |
| |
| /* Draws an inverse filled path by using Path Ops to compute the positive |
| * inverse using the current clip as the inverse bounds. |
| * Return true if this was an inverse path and was properly handled, |
| * otherwise returns false and the normal drawing routine should continue, |
| * either as a (incorrect) fallback or because the path was not inverse |
| * in the first place. |
| */ |
| bool SkPDFDevice::handleInversePath(const SkPath& origPath, |
| const SkPaint& paint, |
| bool pathIsMutable) { |
| if (!origPath.isInverseFillType()) { |
| return false; |
| } |
| |
| if (this->hasEmptyClip()) { |
| return false; |
| } |
| |
| SkPath modifiedPath; |
| SkPath* pathPtr = const_cast<SkPath*>(&origPath); |
| SkPaint noInversePaint(paint); |
| |
| // Merge stroking operations into final path. |
| if (SkPaint::kStroke_Style == paint.getStyle() || |
| SkPaint::kStrokeAndFill_Style == paint.getStyle()) { |
| bool doFillPath = paint.getFillPath(origPath, &modifiedPath); |
| if (doFillPath) { |
| noInversePaint.setStyle(SkPaint::kFill_Style); |
| noInversePaint.setStrokeWidth(0); |
| pathPtr = &modifiedPath; |
| } else { |
| // To be consistent with the raster output, hairline strokes |
| // are rendered as non-inverted. |
| modifiedPath.toggleInverseFillType(); |
| this->drawPath(modifiedPath, paint, true); |
| return true; |
| } |
| } |
| |
| // Get bounds of clip in current transform space |
| // (clip bounds are given in device space). |
| SkMatrix transformInverse; |
| SkMatrix totalMatrix = this->ctm(); |
| |
| if (!totalMatrix.invert(&transformInverse)) { |
| return false; |
| } |
| SkRect bounds = this->cs().bounds(this->bounds()); |
| transformInverse.mapRect(&bounds); |
| |
| // Extend the bounds by the line width (plus some padding) |
| // so the edge doesn't cause a visible stroke. |
| bounds.outset(paint.getStrokeWidth() + SK_Scalar1, |
| paint.getStrokeWidth() + SK_Scalar1); |
| |
| if (!calculate_inverse_path(bounds, *pathPtr, &modifiedPath)) { |
| return false; |
| } |
| |
| this->drawPath(modifiedPath, noInversePaint, true); |
| return true; |
| } |
| |
| sk_sp<SkPDFArray> SkPDFDevice::getAnnotations() { |
| sk_sp<SkPDFArray> array; |
| size_t count = fLinkToURLs.size() + fLinkToDestinations.size(); |
| if (0 == count) { |
| return array; |
| } |
| array = sk_make_sp<SkPDFArray>(); |
| array->reserve(count); |
| for (const RectWithData& rectWithURL : fLinkToURLs) { |
| SkRect r; |
| fInitialTransform.mapRect(&r, rectWithURL.rect); |
| array->appendObjRef(create_link_to_url(rectWithURL.data.get(), r)); |
| } |
| for (const RectWithData& linkToDestination : fLinkToDestinations) { |
| SkRect r; |
| fInitialTransform.mapRect(&r, linkToDestination.rect); |
| array->appendObjRef( |
| create_link_named_dest(linkToDestination.data.get(), r)); |
| } |
| return array; |
| } |
| |
| void SkPDFDevice::appendDestinations(SkPDFDict* dict, SkPDFObject* page) const { |
| for (const NamedDestination& dest : fNamedDestinations) { |
| auto pdfDest = sk_make_sp<SkPDFArray>(); |
| pdfDest->reserve(5); |
| pdfDest->appendObjRef(sk_ref_sp(page)); |
| pdfDest->appendName("XYZ"); |
| SkPoint p = fInitialTransform.mapXY(dest.point.x(), dest.point.y()); |
| pdfDest->appendScalar(p.x()); |
| pdfDest->appendScalar(p.y()); |
| pdfDest->appendInt(0); // Leave zoom unchanged |
| SkString name(static_cast<const char*>(dest.nameData->data())); |
| dict->insertObject(name, std::move(pdfDest)); |
| } |
| } |
| |
| sk_sp<SkPDFObject> SkPDFDevice::makeFormXObjectFromDevice(bool alpha) { |
| SkMatrix inverseTransform = SkMatrix::I(); |
| if (!fInitialTransform.isIdentity()) { |
| if (!fInitialTransform.invert(&inverseTransform)) { |
| SkDEBUGFAIL("Layer initial transform should be invertible."); |
| inverseTransform.reset(); |
| } |
| } |
| const char* colorSpace = alpha ? "DeviceGray" : nullptr; |
| |
| sk_sp<SkPDFObject> xobject = |
| SkPDFMakeFormXObject(this->content(), |
| SkPDFMakeArray(0, 0, this->width(), this->height()), |
| this->makeResourceDict(), inverseTransform, colorSpace); |
| // We always draw the form xobjects that we create back into the device, so |
| // we simply preserve the font usage instead of pulling it out and merging |
| // it back in later. |
| this->reset(); |
| return xobject; |
| } |
| |
| void SkPDFDevice::drawFormXObjectWithMask(sk_sp<SkPDFObject> xObject, |
| sk_sp<SkPDFObject> mask, |
| SkBlendMode mode, |
| bool invertClip) { |
| SkPaint paint; |
| paint.setBlendMode(mode); |
| ScopedContentEntry content(this, nullptr, SkMatrix::I(), paint); |
| if (!content) { |
| return; |
| } |
| this->setGraphicState(SkPDFGraphicState::GetSMaskGraphicState( |
| std::move(mask), invertClip, SkPDFGraphicState::kAlpha_SMaskMode, |
| fDocument->canon()), content.stream()); |
| this->drawFormXObject(std::move(xObject), content.stream()); |
| this->clearMaskOnGraphicState(content.stream()); |
| } |
| |
| |
| static bool treat_as_regular_pdf_blend_mode(SkBlendMode blendMode) { |
| return nullptr != SkPDFUtils::BlendModeName(blendMode); |
| } |
| |
| SkDynamicMemoryWStream* SkPDFDevice::setUpContentEntry(const SkClipStack* clipStack, |
| const SkMatrix& matrix, |
| const SkPaint& paint, |
| bool hasText, |
| sk_sp<SkPDFObject>* dst) { |
| *dst = nullptr; |
| SkBlendMode blendMode = paint.getBlendMode(); |
| |
| // Dst xfer mode doesn't draw source at all. |
| if (blendMode == SkBlendMode::kDst) { |
| return nullptr; |
| } |
| |
| // For the following modes, we want to handle source and destination |
| // separately, so make an object of what's already there. |
| if (!treat_as_regular_pdf_blend_mode(blendMode) && blendMode != SkBlendMode::kDstOver) { |
| if (!isContentEmpty()) { |
| *dst = this->makeFormXObjectFromDevice(); |
| SkASSERT(isContentEmpty()); |
| } else if (blendMode != SkBlendMode::kSrc && |
| blendMode != SkBlendMode::kSrcOut) { |
| // Except for Src and SrcOut, if there isn't anything already there, |
| // then we're done. |
| return nullptr; |
| } |
| } |
| // TODO(vandebo): Figure out how/if we can handle the following modes: |
| // Xor, Plus. For now, we treat them as SrcOver/Normal. |
| |
| if (treat_as_regular_pdf_blend_mode(blendMode)) { |
| if (!fActiveStackState.fContentStream) { |
| if (fContent.bytesWritten() != 0) { |
| fContent.writeText("Q\nq\n"); |
| fNeedsExtraSave = true; |
| } |
| fActiveStackState = GraphicStackState(&fContent); |
| } else { |
| SkASSERT(fActiveStackState.fContentStream = &fContent); |
| } |
| } else { |
| fActiveStackState.drainStack(); |
| fActiveStackState = GraphicStackState(&fContentBuffer); |
| } |
| SkASSERT(fActiveStackState.fContentStream); |
| GraphicStateEntry entry; |
| this->populateGraphicStateEntryFromPaint(matrix, clipStack, paint, hasText, &entry); |
| fActiveStackState.updateClip(clipStack, this->bounds()); |
| fActiveStackState.updateMatrix(entry.fMatrix); |
| fActiveStackState.updateDrawingState(entry); |
| |
| return fActiveStackState.fContentStream; |
| } |
| |
| void SkPDFDevice::finishContentEntry(const SkClipStack* clipStack, |
| SkBlendMode blendMode, |
| sk_sp<SkPDFObject> dst, |
| SkPath* shape) { |
| SkASSERT(blendMode != SkBlendMode::kDst); |
| if (treat_as_regular_pdf_blend_mode(blendMode)) { |
| SkASSERT(!dst); |
| return; |
| } |
| |
| SkASSERT(fActiveStackState.fContentStream); |
| |
| fActiveStackState.drainStack(); |
| fActiveStackState = GraphicStackState(); |
| |
| if (blendMode == SkBlendMode::kDstOver) { |
| SkASSERT(!dst); |
| if (fContentBuffer.bytesWritten() != 0) { |
| if (fContent.bytesWritten() != 0) { |
| fContentBuffer.writeText("Q\nq\n"); |
| fNeedsExtraSave = true; |
| } |
| fContentBuffer.prependToAndReset(&fContent); |
| SkASSERT(fContentBuffer.bytesWritten() == 0); |
| } |
| return; |
| } |
| if (fContentBuffer.bytesWritten() != 0) { |
| if (fContent.bytesWritten() != 0) { |
| fContent.writeText("Q\nq\n"); |
| fNeedsExtraSave = true; |
| } |
| fContentBuffer.writeToAndReset(&fContent); |
| SkASSERT(fContentBuffer.bytesWritten() == 0); |
| } |
| |
| if (!dst) { |
| SkASSERT(blendMode == SkBlendMode::kSrc || |
| blendMode == SkBlendMode::kSrcOut); |
| return; |
| } |
| |
| SkASSERT(dst); |
| // Changing the current content into a form-xobject will destroy the clip |
| // objects which is fine since the xobject will already be clipped. However |
| // if source has shape, we need to clip it too, so a copy of the clip is |
| // saved. |
| |
| SkPaint stockPaint; |
| |
| sk_sp<SkPDFObject> srcFormXObject; |
| if (this->isContentEmpty()) { |
| // If nothing was drawn and there's no shape, then the draw was a |
| // no-op, but dst needs to be restored for that to be true. |
| // If there is shape, then an empty source with Src, SrcIn, SrcOut, |
| // DstIn, DstAtop or Modulate reduces to Clear and DstOut or SrcAtop |
| // reduces to Dst. |
| if (shape == nullptr || blendMode == SkBlendMode::kDstOut || |
| blendMode == SkBlendMode::kSrcATop) { |
| ScopedContentEntry content(this, nullptr, SkMatrix::I(), stockPaint); |
| this->drawFormXObject(std::move(dst), content.stream()); |
| return; |
| } else { |
| blendMode = SkBlendMode::kClear; |
| } |
| } else { |
| srcFormXObject = this->makeFormXObjectFromDevice(); |
| } |
| |
| // TODO(vandebo) srcFormXObject may contain alpha, but here we want it |
| // without alpha. |
| if (blendMode == SkBlendMode::kSrcATop) { |
| // TODO(vandebo): In order to properly support SrcATop we have to track |
| // the shape of what's been drawn at all times. It's the intersection of |
| // the non-transparent parts of the device and the outlines (shape) of |
| // all images and devices drawn. |
| this->drawFormXObjectWithMask(srcFormXObject, dst, SkBlendMode::kSrcOver, true); |
| } else { |
| if (shape != nullptr) { |
| // Draw shape into a form-xobject. |
| SkPaint filledPaint; |
| filledPaint.setColor(SK_ColorBLACK); |
| filledPaint.setStyle(SkPaint::kFill_Style); |
| SkClipStack empty; |
| SkPDFDevice shapeDev(this->size(), fDocument, fInitialTransform); |
| shapeDev.internalDrawPath(clipStack ? *clipStack : empty, |
| SkMatrix::I(), *shape, filledPaint, true); |
| this->drawFormXObjectWithMask(dst, shapeDev.makeFormXObjectFromDevice(), |
| SkBlendMode::kSrcOver, true); |
| } else { |
| this->drawFormXObjectWithMask(dst, srcFormXObject, SkBlendMode::kSrcOver, true); |
| } |
| } |
| |
| if (blendMode == SkBlendMode::kClear) { |
| return; |
| } else if (blendMode == SkBlendMode::kSrc || |
| blendMode == SkBlendMode::kDstATop) { |
| ScopedContentEntry content(this, nullptr, SkMatrix::I(), stockPaint); |
| if (content) { |
| this->drawFormXObject(srcFormXObject, content.stream()); |
| } |
| if (blendMode == SkBlendMode::kSrc) { |
| return; |
| } |
| } else if (blendMode == SkBlendMode::kSrcATop) { |
| ScopedContentEntry content(this, nullptr, SkMatrix::I(), stockPaint); |
| if (content) { |
| this->drawFormXObject(dst, content.stream()); |
| } |
| } |
| |
| SkASSERT(blendMode == SkBlendMode::kSrcIn || |
| blendMode == SkBlendMode::kDstIn || |
| blendMode == SkBlendMode::kSrcOut || |
| blendMode == SkBlendMode::kDstOut || |
| blendMode == SkBlendMode::kSrcATop || |
| blendMode == SkBlendMode::kDstATop || |
| blendMode == SkBlendMode::kModulate); |
| |
| if (blendMode == SkBlendMode::kSrcIn || |
| blendMode == SkBlendMode::kSrcOut || |
| blendMode == SkBlendMode::kSrcATop) { |
| this->drawFormXObjectWithMask(std::move(srcFormXObject), std::move(dst), |
| SkBlendMode::kSrcOver, blendMode == SkBlendMode::kSrcOut); |
| return; |
| } else { |
| SkBlendMode mode = SkBlendMode::kSrcOver; |
| if (blendMode == SkBlendMode::kModulate) { |
| this->drawFormXObjectWithMask(srcFormXObject, dst, SkBlendMode::kSrcOver, false); |
| mode = SkBlendMode::kMultiply; |
| } |
| this->drawFormXObjectWithMask(std::move(dst), std::move(srcFormXObject), mode, |
| blendMode == SkBlendMode::kDstOut); |
| return; |
| } |
| } |
| |
| bool SkPDFDevice::isContentEmpty() { |
| return fContent.bytesWritten() == 0 && fContentBuffer.bytesWritten() == 0; |
| } |
| |
| void SkPDFDevice::populateGraphicStateEntryFromPaint( |
| const SkMatrix& matrix, |
| const SkClipStack* clipStack, |
| const SkPaint& paint, |
| bool hasText, |
| SkPDFDevice::GraphicStateEntry* entry) { |
| NOT_IMPLEMENTED(paint.getPathEffect() != nullptr, false); |
| NOT_IMPLEMENTED(paint.getMaskFilter() != nullptr, false); |
| NOT_IMPLEMENTED(paint.getColorFilter() != nullptr, false); |
| |
| entry->fMatrix = matrix; |
| entry->fClipStackGenID = clipStack ? clipStack->getTopmostGenID() |
| : SkClipStack::kWideOpenGenID; |
| SkColor4f color = paint.getColor4f(); |
| entry->fColor = {color.fR, color.fG, color.fB, 1}; |
| entry->fShaderIndex = -1; |
| |
| // PDF treats a shader as a color, so we only set one or the other. |
| sk_sp<SkPDFObject> pdfShader; |
| SkShader* shader = paint.getShader(); |
| if (shader) { |
| if (SkShader::kColor_GradientType == shader->asAGradient(nullptr)) { |
| // We don't have to set a shader just for a color. |
| SkShader::GradientInfo gradientInfo; |
| SkColor gradientColor = SK_ColorBLACK; |
| gradientInfo.fColors = &gradientColor; |
| gradientInfo.fColorOffsets = nullptr; |
| gradientInfo.fColorCount = 1; |
| SkAssertResult(shader->asAGradient(&gradientInfo) == SkShader::kColor_GradientType); |
| color = SkColor4f::FromColor(gradientColor); |
| entry->fColor ={color.fR, color.fG, color.fB, 1}; |
| |
| } else { |
| // PDF positions patterns relative to the initial transform, so |
| // we need to apply the current transform to the shader parameters. |
| SkMatrix transform = matrix; |
| transform.postConcat(fInitialTransform); |
| |
| // PDF doesn't support kClamp_TileMode, so we simulate it by making |
| // a pattern the size of the current clip. |
| SkRect clipStackBounds = clipStack ? clipStack->bounds(this->bounds()) |
| : SkRect::Make(this->bounds()); |
| |
| // We need to apply the initial transform to bounds in order to get |
| // bounds in a consistent coordinate system. |
| fInitialTransform.mapRect(&clipStackBounds); |
| SkIRect bounds; |
| clipStackBounds.roundOut(&bounds); |
| |
| pdfShader = SkPDFMakeShader(fDocument, shader, transform, bounds, paint.getColor()); |
| |
| if (pdfShader) { |
| // pdfShader has been canonicalized so we can directly compare pointers. |
| entry->fShaderIndex = find_or_add(&fShaderResources, std::move(pdfShader)); |
| } |
| } |
| } |
| |
| sk_sp<SkPDFDict> newGraphicState; |
| if (color == paint.getColor4f()) { |
| newGraphicState = SkPDFGraphicState::GetGraphicStateForPaint(fDocument->canon(), paint); |
| } else { |
| SkPaint newPaint = paint; |
| newPaint.setColor4f(color, nullptr); |
| newGraphicState = SkPDFGraphicState::GetGraphicStateForPaint(fDocument->canon(), newPaint); |
| } |
| entry->fGraphicStateIndex = find_or_add(&fGraphicStateResources, std::move(newGraphicState)); |
| |
| if (hasText) { |
| entry->fTextScaleX = paint.getTextScaleX(); |
| entry->fTextFill = paint.getStyle(); |
| } else { |
| entry->fTextScaleX = 0; |
| } |
| } |
| |
| static SkSize rect_to_size(const SkRect& r) { return {r.width(), r.height()}; } |
| |
| static sk_sp<SkImage> color_filter(const SkImage* image, |
| SkColorFilter* colorFilter) { |
| auto surface = |
| SkSurface::MakeRaster(SkImageInfo::MakeN32Premul(image->dimensions())); |
| SkASSERT(surface); |
| SkCanvas* canvas = surface->getCanvas(); |
| canvas->clear(SK_ColorTRANSPARENT); |
| SkPaint paint; |
| paint.setColorFilter(sk_ref_sp(colorFilter)); |
| canvas->drawImage(image, 0, 0, &paint); |
| return surface->makeImageSnapshot(); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| static bool is_integer(SkScalar x) { |
| return x == SkScalarTruncToScalar(x); |
| } |
| |
| static bool is_integral(const SkRect& r) { |
| return is_integer(r.left()) && |
| is_integer(r.top()) && |
| is_integer(r.right()) && |
| is_integer(r.bottom()); |
| } |
| |
| void SkPDFDevice::internalDrawImageRect(SkKeyedImage imageSubset, |
| const SkRect* src, |
| const SkRect& dst, |
| const SkPaint& srcPaint, |
| const SkMatrix& ctm) { |
| if (this->hasEmptyClip()) { |
| return; |
| } |
| if (!imageSubset) { |
| return; |
| } |
| |
| // First, figure out the src->dst transform and subset the image if needed. |
| SkIRect bounds = imageSubset.image()->bounds(); |
| SkRect srcRect = src ? *src : SkRect::Make(bounds); |
| SkMatrix transform; |
| transform.setRectToRect(srcRect, dst, SkMatrix::kFill_ScaleToFit); |
| if (src && *src != SkRect::Make(bounds)) { |
| if (!srcRect.intersect(SkRect::Make(bounds))) { |
| return; |
| } |
| srcRect.roundOut(&bounds); |
| transform.preTranslate(SkIntToScalar(bounds.x()), |
| SkIntToScalar(bounds.y())); |
| if (bounds != imageSubset.image()->bounds()) { |
| imageSubset = imageSubset.subset(bounds); |
| } |
| if (!imageSubset) { |
| return; |
| } |
| } |
| |
| // If the image is opaque and the paint's alpha is too, replace |
| // kSrc blendmode with kSrcOver. |
| SkPaint paint = srcPaint; |
| if (imageSubset.image()->isOpaque()) { |
| replace_srcmode_on_opaque_paint(&paint); |
| } |
| |
| // Alpha-only images need to get their color from the shader, before |
| // applying the colorfilter. |
| if (imageSubset.image()->isAlphaOnly() && paint.getColorFilter()) { |
| // must blend alpha image and shader before applying colorfilter. |
| auto surface = |
| SkSurface::MakeRaster(SkImageInfo::MakeN32Premul(imageSubset.image()->dimensions())); |
| SkCanvas* canvas = surface->getCanvas(); |
| SkPaint tmpPaint; |
| // In the case of alpha images with shaders, the shader's coordinate |
| // system is the image's coordiantes. |
| tmpPaint.setShader(sk_ref_sp(paint.getShader())); |
| tmpPaint.setColor4f(paint.getColor4f(), nullptr); |
| canvas->clear(0x00000000); |
| canvas->drawImage(imageSubset.image().get(), 0, 0, &tmpPaint); |
| paint.setShader(nullptr); |
| imageSubset = SkKeyedImage(surface->makeImageSnapshot()); |
| SkASSERT(!imageSubset.image()->isAlphaOnly()); |
| } |
| |
| if (imageSubset.image()->isAlphaOnly()) { |
| // The ColorFilter applies to the paint color/shader, not the alpha layer. |
| SkASSERT(nullptr == paint.getColorFilter()); |
| |
| sk_sp<SkImage> mask = alpha_image_to_greyscale_image(imageSubset.image().get()); |
| if (!mask) { |
| return; |
| } |
| // PDF doesn't seem to allow masking vector graphics with an Image XObject. |
| // Must mask with a Form XObject. |
| sk_sp<SkPDFDevice> maskDevice = this->makeCongruentDevice(); |
| { |
| SkCanvas canvas(maskDevice); |
| if (paint.getMaskFilter()) { |
| // This clip prevents the mask image shader from covering |
| // entire device if unnecessary. |
| canvas.clipRect(this->cs().bounds(this->bounds())); |
| canvas.concat(ctm); |
| SkPaint tmpPaint; |
| tmpPaint.setShader(mask->makeShader(&transform)); |
| tmpPaint.setMaskFilter(sk_ref_sp(paint.getMaskFilter())); |
| canvas.drawRect(dst, tmpPaint); |
| } else { |
| canvas.concat(ctm); |
| if (src && !is_integral(*src)) { |
| canvas.clipRect(dst); |
| } |
| canvas.concat(transform); |
| canvas.drawImage(mask, 0, 0); |
| } |
| } |
| if (!ctm.isIdentity() && paint.getShader()) { |
| transform_shader(&paint, ctm); // Since we are using identity matrix. |
| } |
| ScopedContentEntry content(this, &this->cs(), SkMatrix::I(), paint); |
| if (!content) { |
| return; |
| } |
| this->addSMaskGraphicState(std::move(maskDevice), content.stream()); |
| SkPDFUtils::AppendRectangle(SkRect::Make(this->size()), content.stream()); |
| SkPDFUtils::PaintPath(SkPaint::kFill_Style, SkPath::kWinding_FillType, content.stream()); |
| this->clearMaskOnGraphicState(content.stream()); |
| return; |
| } |
| if (paint.getMaskFilter()) { |
| paint.setShader(imageSubset.image()->makeShader(&transform)); |
| SkPath path = to_path(dst); // handles non-integral clipping. |
| this->internalDrawPath(this->cs(), this->ctm(), path, paint, true); |
| return; |
| } |
| transform.postConcat(ctm); |
| |
| bool needToRestore = false; |
| if (src && !is_integral(*src)) { |
| // Need sub-pixel clipping to fix https://bug.skia.org/4374 |
| this->cs().save(); |
| this->cs().clipRect(dst, ctm, SkClipOp::kIntersect, true); |
| needToRestore = true; |
| } |
| SK_AT_SCOPE_EXIT(if (needToRestore) { this->cs().restore(); }); |
| |
| #ifdef SK_PDF_IMAGE_STATS |
| gDrawImageCalls.fetch_add(1); |
| #endif |
| SkMatrix matrix = transform; |
| |
| // Rasterize the bitmap using perspective in a new bitmap. |
| if (transform.hasPerspective()) { |
| // Transform the bitmap in the new space, without taking into |
| // account the initial transform. |
| SkRect imageBounds = SkRect::Make(imageSubset.image()->bounds()); |
| SkPath perspectiveOutline = to_path(imageBounds); |
| perspectiveOutline.transform(transform); |
| |
| // TODO(edisonn): perf - use current clip too. |
| // Retrieve the bounds of the new shape. |
| SkRect bounds = perspectiveOutline.getBounds(); |
| |
| // Transform the bitmap in the new space, taking into |
| // account the initial transform. |
| SkMatrix total = transform; |
| total.postConcat(fInitialTransform); |
| |
| SkPath physicalPerspectiveOutline = to_path(imageBounds); |
| physicalPerspectiveOutline.transform(total); |
| |
| SkRect physicalPerspectiveBounds = |
| physicalPerspectiveOutline.getBounds(); |
| SkScalar scaleX = physicalPerspectiveBounds.width() / bounds.width(); |
| SkScalar scaleY = physicalPerspectiveBounds.height() / bounds.height(); |
| |
| // TODO(edisonn): A better approach would be to use a bitmap shader |
| // (in clamp mode) and draw a rect over the entire bounding box. Then |
| // intersect perspectiveOutline to the clip. That will avoid introducing |
| // alpha to the image while still giving good behavior at the edge of |
| // the image. Avoiding alpha will reduce the pdf size and generation |
| // CPU time some. |
| |
| SkISize wh = rect_to_size(physicalPerspectiveBounds).toCeil(); |
| |
| auto surface = SkSurface::MakeRaster(SkImageInfo::MakeN32Premul(wh)); |
| if (!surface) { |
| return; |
| } |
| SkCanvas* canvas = surface->getCanvas(); |
| canvas->clear(SK_ColorTRANSPARENT); |
| |
| SkScalar deltaX = bounds.left(); |
| SkScalar deltaY = bounds.top(); |
| |
| SkMatrix offsetMatrix = transform; |
| offsetMatrix.postTranslate(-deltaX, -deltaY); |
| offsetMatrix.postScale(scaleX, scaleY); |
| |
| // Translate the draw in the new canvas, so we perfectly fit the |
| // shape in the bitmap. |
| canvas->setMatrix(offsetMatrix); |
| canvas->drawImage(imageSubset.image(), 0, 0); |
| // Make sure the final bits are in the bitmap. |
| canvas->flush(); |
| |
| // In the new space, we use the identity matrix translated |
| // and scaled to reflect DPI. |
| matrix.setScale(1 / scaleX, 1 / scaleY); |
| matrix.postTranslate(deltaX, deltaY); |
| |
| imageSubset = SkKeyedImage(surface->makeImageSnapshot()); |
| if (!imageSubset) { |
| return; |
| } |
| } |
| |
| SkMatrix scaled; |
| // Adjust for origin flip. |
| scaled.setScale(SK_Scalar1, -SK_Scalar1); |
| scaled.postTranslate(0, SK_Scalar1); |
| // Scale the image up from 1x1 to WxH. |
| SkIRect subset = imageSubset.image()->bounds(); |
| scaled.postScale(SkIntToScalar(subset.width()), |
| SkIntToScalar(subset.height())); |
| scaled.postConcat(matrix); |
| ScopedContentEntry content(this, &this->cs(), scaled, paint); |
| if (!content) { |
| return; |
| } |
| if (content.needShape()) { |
| SkPath shape = to_path(SkRect::Make(subset)); |
| shape.transform(matrix); |
| content.setShape(shape); |
| } |
| if (!content.needSource()) { |
| return; |
| } |
| |
| if (SkColorFilter* colorFilter = paint.getColorFilter()) { |
| sk_sp<SkImage> img = color_filter(imageSubset.image().get(), colorFilter); |
| imageSubset = SkKeyedImage(std::move(img)); |
| if (!imageSubset) { |
| return; |
| } |
| // TODO(halcanary): de-dupe this by caching filtered images. |
| // (maybe in the resource cache?) |
| } |
| |
| SkBitmapKey key = imageSubset.key(); |
| sk_sp<SkPDFObject>* pdfimagePtr = fDocument->canon()->fPDFBitmapMap.find(key); |
| sk_sp<SkPDFObject> pdfimage = pdfimagePtr ? *pdfimagePtr : nullptr; |
| if (!pdfimage) { |
| SkASSERT(imageSubset); |
| pdfimage = SkPDFCreateBitmapObject(imageSubset.release(), |
| fDocument->metadata().fEncodingQuality); |
| if (!pdfimage) { |
| return; |
| } |
| fDocument->serialize(pdfimage); // serialize images early. |
| SkASSERT((key != SkBitmapKey{{0, 0, 0, 0}, 0})); |
| fDocument->canon()->fPDFBitmapMap.set(key, pdfimage); |
| } |
| this->drawFormXObject(std::move(pdfimage), content.stream()); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #include "SkSpecialImage.h" |
| #include "SkImageFilter.h" |
| |
| void SkPDFDevice::drawSpecial(SkSpecialImage* srcImg, int x, int y, const SkPaint& paint, |
| SkImage* clipImage, const SkMatrix& clipMatrix) { |
| if (this->hasEmptyClip()) { |
| return; |
| } |
| SkASSERT(!srcImg->isTextureBacked()); |
| |
| //TODO: clipImage support |
| |
| SkBitmap resultBM; |
| |
| SkImageFilter* filter = paint.getImageFilter(); |
| if (filter) { |
| SkIPoint offset = SkIPoint::Make(0, 0); |
| SkMatrix matrix = this->ctm(); |
| matrix.postTranslate(SkIntToScalar(-x), SkIntToScalar(-y)); |
| const SkIRect clipBounds = |
| this->cs().bounds(this->bounds()).roundOut().makeOffset(-x, -y); |
| sk_sp<SkImageFilterCache> cache(this->getImageFilterCache()); |
| // TODO: Should PDF be operating in a specified color type/space? For now, run the filter |
| // in the same color space as the source (this is different from all other backends). |
| SkImageFilter::OutputProperties outputProperties(kN32_SkColorType, srcImg->getColorSpace()); |
| SkImageFilter::Context ctx(matrix, clipBounds, cache.get(), outputProperties); |
| |
| sk_sp<SkSpecialImage> resultImg(filter->filterImage(srcImg, ctx, &offset)); |
| if (resultImg) { |
| SkPaint tmpUnfiltered(paint); |
| tmpUnfiltered.setImageFilter(nullptr); |
| if (resultImg->getROPixels(&resultBM)) { |
| this->drawSprite(resultBM, x + offset.x(), y + offset.y(), tmpUnfiltered); |
| } |
| } |
| } else { |
| if (srcImg->getROPixels(&resultBM)) { |
| this->drawSprite(resultBM, x, y, paint); |
| } |
| } |
| } |
| |
| sk_sp<SkSpecialImage> SkPDFDevice::makeSpecial(const SkBitmap& bitmap) { |
| return SkSpecialImage::MakeFromRaster(bitmap.bounds(), bitmap); |
| } |
| |
| sk_sp<SkSpecialImage> SkPDFDevice::makeSpecial(const SkImage* image) { |
| return SkSpecialImage::MakeFromImage(image->bounds(), image->makeNonTextureImage()); |
| } |
| |
| sk_sp<SkSpecialImage> SkPDFDevice::snapSpecial() { |
| return nullptr; |
| } |
| |
| SkImageFilterCache* SkPDFDevice::getImageFilterCache() { |
| // We always return a transient cache, so it is freed after each |
| // filter traversal. |
| return SkImageFilterCache::Create(SkImageFilterCache::kDefaultTransientSize); |
| } |