| /* |
| * 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 "SkColor.h" |
| #include "SkColorFilter.h" |
| #include "SkDraw.h" |
| #include "SkDrawFilter.h" |
| #include "SkGlyphCache.h" |
| #include "SkImageFilterCache.h" |
| #include "SkJpegEncoder.h" |
| #include "SkMakeUnique.h" |
| #include "SkMaskFilter.h" |
| #include "SkPDFBitmap.h" |
| #include "SkPDFCanon.h" |
| #include "SkPDFDocument.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 "SkTextBlobRunIterator.h" |
| #include "SkTextFormatParams.h" |
| #include "SkUtils.h" |
| #include "SkXfermodeInterpretation.h" |
| |
| #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 |
| |
| // 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(SkColor color, SkWStream* result) { |
| SkASSERT(SkColorGetA(color) == 0xFF); // We handle alpha elsewhere. |
| SkPDFUtils::AppendColorComponent(SkColorGetR(color), result); |
| result->writeText(" "); |
| SkPDFUtils::AppendColorComponent(SkColorGetG(color), result); |
| result->writeText(" "); |
| SkPDFUtils::AppendColorComponent(SkColorGetB(color), result); |
| result->writeText(" "); |
| } |
| |
| static SkPaint calculate_text_paint(const SkPaint& paint) { |
| SkPaint result = paint; |
| if (result.isFakeBoldText()) { |
| SkScalar fakeBoldScale = SkScalarInterpFunc(result.getTextSize(), |
| kStdFakeBoldInterpKeys, |
| kStdFakeBoldInterpValues, |
| kStdFakeBoldInterpLength); |
| SkScalar width = result.getTextSize() * fakeBoldScale; |
| if (result.getStyle() == SkPaint::kFill_Style) { |
| result.setStyle(SkPaint::kStrokeAndFill_Style); |
| } else { |
| width += result.getStrokeWidth(); |
| } |
| result.setStrokeWidth(width); |
| } |
| return result; |
| } |
| |
| |
| // 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->setColor(cf->filterColor(paint->getColor())); |
| } |
| paint->setColorFilter(nullptr); |
| } |
| } |
| |
| SkPDFDevice::GraphicStateEntry::GraphicStateEntry() |
| : fColor(SK_ColorBLACK) |
| , fTextScaleX(SK_Scalar1) |
| , fTextFill(SkPaint::kFill_Style) |
| , fShaderIndex(-1) |
| , fGraphicStateIndex(-1) { |
| fMatrix.reset(); |
| } |
| |
| bool SkPDFDevice::GraphicStateEntry::compareInitialState( |
| const GraphicStateEntry& cur) { |
| return fColor == cur.fColor && |
| fShaderIndex == cur.fShaderIndex && |
| fGraphicStateIndex == cur.fGraphicStateIndex && |
| fMatrix == cur.fMatrix && |
| fClipStack == cur.fClipStack && |
| (fTextScaleX == 0 || |
| (fTextScaleX == cur.fTextScaleX && fTextFill == cur.fTextFill)); |
| } |
| |
| class GraphicStackState { |
| public: |
| GraphicStackState(const SkClipStack& existingClipStack, |
| SkWStream* contentStream) |
| : fStackDepth(0), |
| fContentStream(contentStream) { |
| fEntries[0].fClipStack = existingClipStack; |
| } |
| |
| void updateClip(const SkClipStack& clipStack, |
| const SkPoint& translation, const SkRect& bounds); |
| void updateMatrix(const SkMatrix& matrix); |
| void updateDrawingState(const SkPDFDevice::GraphicStateEntry& state); |
| |
| void drainStack(); |
| |
| private: |
| void push(); |
| void pop(); |
| SkPDFDevice::GraphicStateEntry* currentEntry() { return &fEntries[fStackDepth]; } |
| |
| // Conservative limit on save depth, see impl. notes in PDF 1.4 spec. |
| static const int kMaxStackDepth = 12; |
| SkPDFDevice::GraphicStateEntry fEntries[kMaxStackDepth + 1]; |
| int fStackDepth; |
| SkWStream* fContentStream; |
| }; |
| |
| void GraphicStackState::drainStack() { |
| while (fStackDepth) { |
| pop(); |
| } |
| } |
| |
| void GraphicStackState::push() { |
| SkASSERT(fStackDepth < kMaxStackDepth); |
| fContentStream->writeText("q\n"); |
| fStackDepth++; |
| fEntries[fStackDepth] = fEntries[fStackDepth - 1]; |
| } |
| |
| void GraphicStackState::pop() { |
| SkASSERT(fStackDepth > 0); |
| fContentStream->writeText("Q\n"); |
| 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()); |
| |
| SkPath clipPath; |
| clipPath.addRect(bounds); |
| |
| return Op(clipPath, invPath, kIntersect_SkPathOp, outPath); |
| } |
| |
| bool apply_clip(SkClipOp op, const SkPath& u, const SkPath& v, SkPath* r) { |
| switch (op) { |
| case SkClipOp::kDifference: |
| return Op(u, v, kDifference_SkPathOp, r); |
| case SkClipOp::kIntersect: |
| return Op(u, v, kIntersect_SkPathOp, r); |
| #ifdef SK_SUPPORT_DEPRECATED_CLIPOPS |
| case SkClipOp::kUnion_deprecated: |
| return Op(u, v, kUnion_SkPathOp, r); |
| case SkClipOp::kXOR_deprecated: |
| return Op(u, v, kXOR_SkPathOp, r); |
| case SkClipOp::kReverseDifference_deprecated: |
| return Op(u, v, kReverseDifference_SkPathOp, r); |
| case SkClipOp::kReplace_deprecated: |
| *r = v; |
| return true; |
| #endif |
| default: |
| return false; |
| } |
| } |
| |
| /* Uses Path Ops to calculate a vector SkPath clip from a clip stack. |
| * Returns true if successful, or false if not successful. |
| * If successful, the resulting clip is stored in outClipPath. |
| * If not successful, outClipPath is undefined, and a fallback method |
| * should be used. |
| */ |
| static bool get_clip_stack_path(const SkMatrix& transform, |
| const SkClipStack& clipStack, |
| const SkRect& bounds, |
| SkPath* outClipPath) { |
| outClipPath->reset(); |
| outClipPath->setFillType(SkPath::kInverseWinding_FillType); |
| |
| const SkClipStack::Element* clipEntry; |
| SkClipStack::Iter iter; |
| iter.reset(clipStack, SkClipStack::Iter::kBottom_IterStart); |
| for (clipEntry = iter.next(); clipEntry; clipEntry = iter.next()) { |
| SkPath entryPath; |
| if (SkClipStack::Element::kEmpty_Type == clipEntry->getType()) { |
| outClipPath->reset(); |
| outClipPath->setFillType(SkPath::kInverseWinding_FillType); |
| continue; |
| } else { |
| clipEntry->asPath(&entryPath); |
| } |
| entryPath.transform(transform); |
| if (!apply_clip(clipEntry->getOp(), *outClipPath, entryPath, outClipPath)) { |
| return false; |
| } |
| } |
| |
| if (outClipPath->isInverseFillType()) { |
| // The bounds are slightly outset to ensure this is correct in the |
| // face of floating-point accuracy and possible SkRegion bitmap |
| // approximations. |
| SkRect clipBounds = bounds; |
| clipBounds.outset(SK_Scalar1, SK_Scalar1); |
| if (!calculate_inverse_path(clipBounds, *outClipPath, outClipPath)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| // 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 GraphicStackState::updateClip(const SkClipStack& clipStack, |
| const SkPoint& translation, |
| const SkRect& bounds) { |
| if (clipStack == currentEntry()->fClipStack) { |
| return; |
| } |
| |
| while (fStackDepth > 0) { |
| pop(); |
| if (clipStack == currentEntry()->fClipStack) { |
| return; |
| } |
| } |
| push(); |
| |
| currentEntry()->fClipStack = clipStack; |
| |
| SkMatrix transform; |
| transform.setTranslate(translation.fX, translation.fY); |
| |
| SkPath clipPath; |
| if (get_clip_stack_path(transform, clipStack, bounds, &clipPath)) { |
| SkPDFUtils::EmitPath(clipPath, SkPaint::kFill_Style, fContentStream); |
| SkPath::FillType clipFill = clipPath.getFillType(); |
| NOT_IMPLEMENTED(clipFill == SkPath::kInverseEvenOdd_FillType, false); |
| NOT_IMPLEMENTED(clipFill == SkPath::kInverseWinding_FillType, false); |
| if (clipFill == SkPath::kEvenOdd_FillType) { |
| fContentStream->writeText("W* n\n"); |
| } else { |
| fContentStream->writeText("W n\n"); |
| } |
| } |
| // If Op() fails (pathological case; e.g. input values are |
| // extremely large or NaN), emit no clip at all. |
| } |
| |
| void GraphicStackState::updateMatrix(const SkMatrix& matrix) { |
| if (matrix == currentEntry()->fMatrix) { |
| return; |
| } |
| |
| if (currentEntry()->fMatrix.getType() != SkMatrix::kIdentity_Mask) { |
| SkASSERT(fStackDepth > 0); |
| SkASSERT(fEntries[fStackDepth].fClipStack == |
| fEntries[fStackDepth -1].fClipStack); |
| pop(); |
| |
| SkASSERT(currentEntry()->fMatrix.getType() == SkMatrix::kIdentity_Mask); |
| } |
| if (matrix.getType() == SkMatrix::kIdentity_Mask) { |
| return; |
| } |
| |
| push(); |
| SkPDFUtils::AppendTransform(matrix, fContentStream); |
| currentEntry()->fMatrix = matrix; |
| } |
| |
| void 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 * 1000; |
| 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) |
| , fContentEntry(nullptr) |
| , fBlendMode(SkBlendMode::kSrcOver) |
| , fDstFormXObject(nullptr) |
| { |
| if (matrix.hasPerspective()) { |
| NOT_IMPLEMENTED(!matrix.hasPerspective(), false); |
| return; |
| } |
| fBlendMode = paint.getBlendMode(); |
| fContentEntry = |
| 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 (fContentEntry) { |
| SkPath* shape = &fShape; |
| if (shape->isEmpty()) { |
| shape = nullptr; |
| } |
| fDevice->finishContentEntry(fBlendMode, std::move(fDstFormXObject), shape); |
| } |
| } |
| |
| SkPDFDevice::ContentEntry* entry() { return fContentEntry; } |
| SkDynamicMemoryWStream* stream() { return &fContentEntry->fContent; } |
| |
| /* 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; |
| SkPDFDevice::ContentEntry* fContentEntry; |
| SkBlendMode fBlendMode; |
| sk_sp<SkPDFObject> fDstFormXObject; |
| SkPath fShape; |
| }; |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| SkPDFDevice::SkPDFDevice(SkISize pageSize, SkPDFDocument* doc) |
| : INHERITED(SkImageInfo::MakeUnknown(pageSize.width(), pageSize.height()), |
| SkSurfaceProps(0, kUnknown_SkPixelGeometry)) |
| , fPageSize(pageSize) |
| , fInitialTransform(SkMatrix::I()) |
| , fDocument(doc) |
| { |
| SkASSERT(!pageSize.isEmpty()); |
| } |
| |
| void SkPDFDevice::setFlip() { |
| // Skia generally uses the top left as the origin but PDF |
| // natively has the origin at the bottom left. This matrix |
| // corrects for that. But that only needs to be done once, we |
| // don't do it when layering. |
| fInitialTransform.setTranslate(0, SkIntToScalar(fPageSize.fHeight)); |
| fInitialTransform.preScale(SK_Scalar1, -SK_Scalar1); |
| } |
| |
| SkPDFDevice::~SkPDFDevice() { |
| this->cleanUp(); |
| } |
| |
| void SkPDFDevice::init() { |
| fContentEntries.reset(); |
| } |
| |
| void SkPDFDevice::cleanUp() { |
| fGraphicStateResources.unrefAll(); |
| fXObjectResources.unrefAll(); |
| fFontResources.unrefAll(); |
| fShaderResources.unrefAll(); |
| } |
| |
| void SkPDFDevice::drawAnnotation(const SkRect& rect, const char key[], SkData* value) { |
| if (!value) { |
| return; |
| } |
| if (rect.isEmpty()) { |
| 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; |
| path.addRect(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) { |
| SkPaint newPaint = srcPaint; |
| remove_color_filter(&newPaint); |
| replace_srcmode_on_opaque_paint(&newPaint); |
| newPaint.setStyle(SkPaint::kFill_Style); |
| |
| SkMatrix ctm = this->ctm(); |
| if (ctm.getType() & SkMatrix::kPerspective_Mask) { |
| if (newPaint.getShader()) { |
| transform_shader(&newPaint, ctm); |
| } |
| ctm = SkMatrix::I(); |
| } |
| ScopedContentEntry content(this, this->cs(), ctm, newPaint); |
| this->internalDrawPaint(newPaint, content.entry()); |
| } |
| |
| void SkPDFDevice::internalDrawPaint(const SkPaint& paint, |
| SkPDFDevice::ContentEntry* contentEntry) { |
| if (!contentEntry) { |
| return; |
| } |
| SkRect bbox = SkRect::Make(fPageSize); |
| SkMatrix inverse; |
| if (!contentEntry->fState.fMatrix.invert(&inverse)) { |
| return; |
| } |
| inverse.mapRect(&bbox); |
| |
| SkPDFUtils::AppendRectangle(bbox, &contentEntry->fContent); |
| SkPDFUtils::PaintPath(paint.getStyle(), SkPath::kWinding_FillType, |
| &contentEntry->fContent); |
| } |
| |
| void SkPDFDevice::drawPoints(SkCanvas::PointMode mode, |
| size_t count, |
| const SkPoint* points, |
| const SkPaint& srcPaint) { |
| 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()) { |
| if (this->cs().isEmpty(this->bounds())) { |
| return; |
| } |
| 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.entry()) { |
| 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 |
| |
| auto border = sk_make_sp<SkPDFArray>(); |
| border->reserve(3); |
| border->appendInt(0); // Horizontal corner radius. |
| border->appendInt(0); // Vertical corner radius. |
| border->appendInt(0); // Width, 0 = no border. |
| annotation->insertObject("Border", std::move(border)); |
| |
| auto rect = sk_make_sp<SkPDFArray>(); |
| rect->reserve(4); |
| rect->appendScalar(translatedRect.fLeft); |
| rect->appendScalar(translatedRect.fTop); |
| rect->appendScalar(translatedRect.fRight); |
| rect->appendScalar(translatedRect.fBottom); |
| annotation->insertObject("Rect", std::move(rect)); |
| |
| 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) { |
| SkPaint paint = srcPaint; |
| remove_color_filter(&paint); |
| replace_srcmode_on_opaque_paint(&paint); |
| SkRect r = rect; |
| r.sort(); |
| |
| if (paint.getPathEffect() || paint.getMaskFilter()) { |
| if (this->cs().isEmpty(this->bounds())) { |
| return; |
| } |
| SkPath path; |
| path.addRect(r); |
| this->drawPath(path, paint, nullptr, true); |
| return; |
| } |
| |
| ScopedContentEntry content(this, paint); |
| if (!content.entry()) { |
| return; |
| } |
| SkPDFUtils::AppendRectangle(r, content.stream()); |
| SkPDFUtils::PaintPath(paint.getStyle(), SkPath::kWinding_FillType, content.stream()); |
| } |
| |
| void SkPDFDevice::drawRRect(const SkRRect& rrect, |
| const SkPaint& srcPaint) { |
| SkPaint paint = srcPaint; |
| remove_color_filter(&paint); |
| replace_srcmode_on_opaque_paint(&paint); |
| SkPath path; |
| path.addRRect(rrect); |
| this->drawPath(path, paint, nullptr, true); |
| } |
| |
| void SkPDFDevice::drawOval(const SkRect& oval, |
| const SkPaint& srcPaint) { |
| SkPaint paint = srcPaint; |
| remove_color_filter(&paint); |
| replace_srcmode_on_opaque_paint(&paint); |
| SkPath path; |
| path.addOval(oval); |
| this->drawPath(path, paint, nullptr, true); |
| } |
| |
| void SkPDFDevice::drawPath(const SkPath& origPath, |
| const SkPaint& srcPaint, |
| const SkMatrix* prePathMatrix, |
| bool pathIsMutable) { |
| this->internalDrawPath( |
| this->cs(), this->ctm(), origPath, srcPaint, prePathMatrix, pathIsMutable); |
| } |
| |
| void SkPDFDevice::internalDrawPathWithFilter(const SkClipStack& clipStack, |
| const SkMatrix& ctm, |
| const SkPath& origPath, |
| const SkPaint& origPaint, |
| const SkMatrix* prePathMatrix) { |
| SkASSERT(origPaint.getMaskFilter()); |
| SkPath path(origPath); |
| SkTCopyOnFirstWrite<SkPaint> paint(origPaint); |
| if (prePathMatrix) { |
| path.transform(*prePathMatrix, &path); |
| } |
| SkStrokeRec::InitStyle initStyle = paint->getFillPath(path, &path) |
| ? SkStrokeRec::kFill_InitStyle |
| : SkStrokeRec::kHairline_InitStyle; |
| path.transform(ctm, &path); |
| |
| // TODO(halcanary): respect fDocument->rasterDpi(). |
| // SkScalar rasterScale = (float)rasterDpi / SkPDFUtils::kDpiForRasterScaleOne; |
| // Would it be easier to just change the device size (and pre-scale the canvas)? |
| 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 (!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.get()); |
| 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.entry()) { |
| 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()); |
| } |
| |
| void SkPDFDevice::addSMaskGraphicState(sk_sp<SkPDFDevice> maskDevice, |
| SkDynamicMemoryWStream* contentStream) { |
| sk_sp<SkPDFDict> sMaskGS = SkPDFGraphicState::GetSMaskGraphicState( |
| maskDevice->makeFormXObjectFromDevice(true), false, |
| SkPDFGraphicState::kLuminosity_SMaskMode, this->getCanon()); |
| SkPDFUtils::ApplyGraphicState(this->addGraphicStateResource(sMaskGS.get()), 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"); |
| } |
| SkPDFUtils::ApplyGraphicState(this->addGraphicStateResource(noSMaskGS.get()), contentStream); |
| } |
| |
| void SkPDFDevice::internalDrawPath(const SkClipStack& clipStack, |
| const SkMatrix& ctm, |
| const SkPath& origPath, |
| const SkPaint& srcPaint, |
| const SkMatrix* prePathMatrix, |
| bool pathIsMutable) { |
| 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, prePathMatrix); |
| return; |
| } |
| |
| SkMatrix matrix = ctm; |
| if (prePathMatrix) { |
| if (paint.getPathEffect() || paint.getStyle() != SkPaint::kFill_Style) { |
| if (!pathIsMutable) { |
| pathPtr = &modifiedPath; |
| pathIsMutable = true; |
| } |
| origPath.transform(*prePathMatrix, pathPtr); |
| } else { |
| matrix.preConcat(*prePathMatrix); |
| } |
| } |
| |
| 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, prePathMatrix)) { |
| 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.entry()) { |
| return; |
| } |
| SkScalar matrixScale = matrix.mapRadius(1.0f); |
| SkScalar tolerance = matrixScale > 0.0f ? 0.25f / matrixScale : 0.25f; |
| 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, |
| bool wideChars, |
| bool defaultPositioning, |
| SkPoint origin) |
| : fContent(content) |
| , fCurrentMatrixOrigin(origin) |
| , fTextSkewX(textSkewX) |
| , fWideChars(wideChars) |
| , fDefaultPositioning(defaultPositioning) { |
| } |
| ~GlyphPositioner() { this->flush(); } |
| void flush() { |
| if (fInText) { |
| fContent->writeText("> Tj\n"); |
| fInText = false; |
| } |
| } |
| 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; |
| } |
| if (!fDefaultPositioning) { |
| SkPoint position = xy - fCurrentMatrixOrigin; |
| if (position != SkPoint{fXAdvance, 0}) { |
| this->flush(); |
| SkPDFUtils::AppendScalar(position.x(), 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; |
| bool fInText = false; |
| bool fInitialized = false; |
| const bool fDefaultPositioning; |
| }; |
| |
| /** Given the m-to-n glyph-to-character mapping data (as returned by |
| harfbuzz), iterate over the clusters. */ |
| class Clusterator { |
| public: |
| Clusterator() : fClusters(nullptr), fUtf8Text(nullptr), fGlyphCount(0), fTextByteLength(0) {} |
| explicit Clusterator(uint32_t glyphCount) |
| : fClusters(nullptr) |
| , fUtf8Text(nullptr) |
| , fGlyphCount(glyphCount) |
| , fTextByteLength(0) {} |
| // The clusters[] array is an array of offsets into utf8Text[], |
| // one offset for each glyph. See SkTextBlobBuilder for more info. |
| Clusterator(const uint32_t* clusters, |
| const char* utf8Text, |
| uint32_t glyphCount, |
| uint32_t textByteLength) |
| : fClusters(clusters) |
| , fUtf8Text(utf8Text) |
| , fGlyphCount(glyphCount) |
| , fTextByteLength(textByteLength) { |
| // This is a cheap heuristic for /ReversedChars which seems to |
| // work for clusters produced by HarfBuzz, which either |
| // increase from zero (LTR) or decrease to zero (RTL). |
| // "ReversedChars" is how PDF deals with RTL text. |
| fReversedChars = |
| fUtf8Text && fClusters && fGlyphCount && fClusters[0] != 0; |
| } |
| struct Cluster { |
| const char* fUtf8Text; |
| uint32_t fTextByteLength; |
| uint32_t fGlyphIndex; |
| uint32_t fGlyphCount; |
| explicit operator bool() const { return fGlyphCount != 0; } |
| }; |
| // True if this looks like right-to-left text. |
| bool reversedChars() const { return fReversedChars; } |
| Cluster next() { |
| if ((!fUtf8Text || !fClusters) && fGlyphCount) { |
| // These glyphs have no text. Treat as one "cluster". |
| uint32_t glyphCount = fGlyphCount; |
| fGlyphCount = 0; |
| return Cluster{nullptr, 0, 0, glyphCount}; |
| } |
| if (fGlyphCount == 0 || fTextByteLength == 0) { |
| return Cluster{nullptr, 0, 0, 0}; // empty |
| } |
| SkASSERT(fUtf8Text); |
| SkASSERT(fClusters); |
| uint32_t cluster = fClusters[0]; |
| if (cluster >= fTextByteLength) { |
| return Cluster{nullptr, 0, 0, 0}; // bad input. |
| } |
| uint32_t glyphsInCluster = 1; |
| while (glyphsInCluster < fGlyphCount && |
| fClusters[glyphsInCluster] == cluster) { |
| ++glyphsInCluster; |
| } |
| SkASSERT(glyphsInCluster <= fGlyphCount); |
| uint32_t textLength = 0; |
| if (glyphsInCluster == fGlyphCount) { |
| // consumes rest of glyphs and rest of text |
| if (kInvalidCluster == fPreviousCluster) { // LTR text or single cluster |
| textLength = fTextByteLength - cluster; |
| } else { // RTL text; last cluster. |
| SkASSERT(fPreviousCluster < fTextByteLength); |
| if (fPreviousCluster <= cluster) { // bad input. |
| return Cluster{nullptr, 0, 0, 0}; |
| } |
| textLength = fPreviousCluster - cluster; |
| } |
| fGlyphCount = 0; |
| return Cluster{fUtf8Text + cluster, |
| textLength, |
| fGlyphIndex, |
| glyphsInCluster}; |
| } |
| SkASSERT(glyphsInCluster < fGlyphCount); |
| uint32_t nextCluster = fClusters[glyphsInCluster]; |
| if (nextCluster >= fTextByteLength) { |
| return Cluster{nullptr, 0, 0, 0}; // bad input. |
| } |
| if (nextCluster > cluster) { // LTR text |
| if (kInvalidCluster != fPreviousCluster) { |
| return Cluster{nullptr, 0, 0, 0}; // bad input. |
| } |
| textLength = nextCluster - cluster; |
| } else { // RTL text |
| SkASSERT(nextCluster < cluster); |
| if (kInvalidCluster == fPreviousCluster) { // first cluster |
| textLength = fTextByteLength - cluster; |
| } else { // later cluster |
| if (fPreviousCluster <= cluster) { |
| return Cluster{nullptr, 0, 0, 0}; // bad input. |
| } |
| textLength = fPreviousCluster - cluster; |
| } |
| fPreviousCluster = cluster; |
| } |
| uint32_t glyphIndex = fGlyphIndex; |
| fGlyphCount -= glyphsInCluster; |
| fGlyphIndex += glyphsInCluster; |
| fClusters += glyphsInCluster; |
| return Cluster{fUtf8Text + cluster, |
| textLength, |
| glyphIndex, |
| glyphsInCluster}; |
| } |
| |
| private: |
| static constexpr uint32_t kInvalidCluster = 0xFFFFFFFF; |
| const uint32_t* fClusters; |
| const char* fUtf8Text; |
| uint32_t fGlyphCount; |
| uint32_t fTextByteLength; |
| uint32_t fGlyphIndex = 0; |
| uint32_t fPreviousCluster = kInvalidCluster; |
| bool fReversedChars = false; |
| }; |
| |
| struct TextStorage { |
| SkAutoTMalloc<char> fUtf8textStorage; |
| SkAutoTMalloc<uint32_t> fClusterStorage; |
| SkAutoTMalloc<SkGlyphID> fGlyphStorage; |
| }; |
| } // namespace |
| |
| /** Given some unicode text (as passed to drawText(), convert to |
| glyphs (via primitive shaping), while preserving |
| glyph-to-character mapping information. */ |
| static Clusterator make_clusterator( |
| const void* sourceText, |
| size_t sourceByteCount, |
| const SkPaint& paint, |
| TextStorage* storage, |
| int glyphCount) { |
| SkASSERT(SkPaint::kGlyphID_TextEncoding != paint.getTextEncoding()); |
| SkASSERT(glyphCount == paint.textToGlyphs(sourceText, sourceByteCount, nullptr)); |
| SkASSERT(glyphCount > 0); |
| storage->fGlyphStorage.reset(SkToSizeT(glyphCount)); |
| (void)paint.textToGlyphs(sourceText, sourceByteCount, storage->fGlyphStorage.get()); |
| storage->fClusterStorage.reset(SkToSizeT(glyphCount)); |
| uint32_t* clusters = storage->fClusterStorage.get(); |
| uint32_t utf8ByteCount = 0; |
| const char* utf8Text = nullptr; |
| switch (paint.getTextEncoding()) { |
| case SkPaint::kUTF8_TextEncoding: { |
| const char* txtPtr = (const char*)sourceText; |
| for (int i = 0; i < glyphCount; ++i) { |
| clusters[i] = SkToU32(txtPtr - (const char*)sourceText); |
| txtPtr += SkUTF8_LeadByteToCount(*(const unsigned char*)txtPtr); |
| SkASSERT(txtPtr <= (const char*)sourceText + sourceByteCount); |
| } |
| SkASSERT(txtPtr == (const char*)sourceText + sourceByteCount); |
| utf8ByteCount = SkToU32(sourceByteCount); |
| utf8Text = (const char*)sourceText; |
| break; |
| } |
| case SkPaint::kUTF16_TextEncoding: { |
| const uint16_t* utf16ptr = (const uint16_t*)sourceText; |
| int utf16count = SkToInt(sourceByteCount / sizeof(uint16_t)); |
| utf8ByteCount = SkToU32(SkUTF16_ToUTF8(utf16ptr, utf16count)); |
| storage->fUtf8textStorage.reset(utf8ByteCount); |
| char* txtPtr = storage->fUtf8textStorage.get(); |
| utf8Text = txtPtr; |
| int clusterIndex = 0; |
| while (utf16ptr < (const uint16_t*)sourceText + utf16count) { |
| clusters[clusterIndex++] = SkToU32(txtPtr - utf8Text); |
| SkUnichar uni = SkUTF16_NextUnichar(&utf16ptr); |
| txtPtr += SkUTF8_FromUnichar(uni, txtPtr); |
| } |
| SkASSERT(clusterIndex == glyphCount); |
| SkASSERT(txtPtr == storage->fUtf8textStorage.get() + utf8ByteCount); |
| SkASSERT(utf16ptr == (const uint16_t*)sourceText + utf16count); |
| break; |
| } |
| case SkPaint::kUTF32_TextEncoding: { |
| const SkUnichar* utf32 = (const SkUnichar*)sourceText; |
| int utf32count = SkToInt(sourceByteCount / sizeof(SkUnichar)); |
| SkASSERT(glyphCount == utf32count); |
| for (int i = 0; i < utf32count; ++i) { |
| utf8ByteCount += SkToU32(SkUTF8_FromUnichar(utf32[i])); |
| } |
| storage->fUtf8textStorage.reset(SkToSizeT(utf8ByteCount)); |
| char* txtPtr = storage->fUtf8textStorage.get(); |
| utf8Text = txtPtr; |
| for (int i = 0; i < utf32count; ++i) { |
| clusters[i] = SkToU32(txtPtr - utf8Text); |
| txtPtr += SkUTF8_FromUnichar(utf32[i], txtPtr); |
| } |
| break; |
| } |
| default: |
| SkDEBUGFAIL(""); |
| break; |
| } |
| return Clusterator(clusters, utf8Text, SkToU32(glyphCount), utf8ByteCount); |
| } |
| |
| static SkUnichar map_glyph(const SkTDArray<SkUnichar>& glyphToUnicode, SkGlyphID glyph) { |
| return SkToInt(glyph) < glyphToUnicode.count() ? glyphToUnicode[SkToInt(glyph)] : -1; |
| } |
| |
| static void update_font(SkWStream* wStream, int fontIndex, SkScalar textSize) { |
| wStream->writeText("/"); |
| char prefix = SkPDFResourceDict::GetResourceTypePrefix(SkPDFResourceDict::kFont_ResourceType); |
| wStream->write(&prefix, 1); |
| wStream->writeDecAsText(fontIndex); |
| wStream->writeText(" "); |
| SkPDFUtils::AppendScalar(textSize, wStream); |
| wStream->writeText(" Tf\n"); |
| } |
| |
| static SkPath draw_text_as_path(const void* sourceText, size_t sourceByteCount, |
| const SkScalar pos[], SkTextBlob::GlyphPositioning positioning, |
| SkPoint offset, const SkPaint& srcPaint) { |
| SkPath path; |
| int glyphCount; |
| SkAutoTMalloc<SkPoint> tmpPoints; |
| switch (positioning) { |
| case SkTextBlob::kDefault_Positioning: |
| srcPaint.getTextPath(sourceText, sourceByteCount, offset.x(), offset.y(), &path); |
| break; |
| case SkTextBlob::kHorizontal_Positioning: |
| glyphCount = srcPaint.countText(sourceText, sourceByteCount); |
| tmpPoints.realloc(glyphCount); |
| for (int i = 0; i < glyphCount; ++i) { |
| tmpPoints[i] = {pos[i] + offset.x(), offset.y()}; |
| } |
| srcPaint.getPosTextPath(sourceText, sourceByteCount, tmpPoints.get(), &path); |
| break; |
| case SkTextBlob::kFull_Positioning: |
| srcPaint.getPosTextPath(sourceText, sourceByteCount, (const SkPoint*)pos, &path); |
| path.offset(offset.x(), offset.y()); |
| break; |
| } |
| return path; |
| } |
| |
| static bool has_outline_glyph(SkGlyphID gid, SkGlyphCache* cache) { |
| const SkGlyph& glyph = cache->getGlyphIDMetrics(gid); |
| const SkPath* path = cache->findPath(glyph); |
| return (path && !path->isEmpty()) || (glyph.fWidth == 0 && glyph.fHeight == 0); |
| } |
| |
| 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(); |
| } |
| |
| static sk_sp<SkImage> image_from_mask(const SkMask& mask) { |
| if (!mask.fImage) { |
| return nullptr; |
| } |
| SkIRect bounds = mask.fBounds; |
| SkBitmap bm; |
| switch (mask.fFormat) { |
| case SkMask::kBW_Format: |
| bm.allocPixels(SkImageInfo::MakeA8(bounds.width(), bounds.height())); |
| for (int y = 0; y < bm.height(); ++y) { |
| for (int x8 = 0; x8 < bm.width(); x8 += 8) { |
| uint8_t v = *mask.getAddr1(x8 + bounds.x(), y + bounds.y()); |
| int e = SkTMin(x8 + 8, bm.width()); |
| for (int x = x8; x < e; ++x) { |
| *bm.getAddr8(x, y) = (v >> (x & 0x7)) & 0x1 ? 0xFF : 0x00; |
| } |
| } |
| } |
| bm.setImmutable(); |
| return SkImage::MakeFromBitmap(bm); |
| case SkMask::kA8_Format: |
| bm.installPixels(SkImageInfo::MakeA8(bounds.width(), bounds.height()), |
| mask.fImage, mask.fRowBytes); |
| return SkMakeImageFromRasterBitmap(bm, kAlways_SkCopyPixelsMode); |
| case SkMask::kARGB32_Format: |
| bm.installPixels(SkImageInfo::MakeN32Premul(bounds.width(), bounds.height()), |
| mask.fImage, mask.fRowBytes); |
| return SkMakeImageFromRasterBitmap(bm, kAlways_SkCopyPixelsMode); |
| case SkMask::k3D_Format: |
| SkASSERT(false); |
| return nullptr; |
| case SkMask::kLCD16_Format: |
| SkASSERT(false); |
| return nullptr; |
| default: |
| SkASSERT(false); |
| return nullptr; |
| } |
| } |
| |
| void SkPDFDevice::internalDrawText( |
| const void* sourceText, size_t sourceByteCount, |
| const SkScalar pos[], SkTextBlob::GlyphPositioning positioning, |
| SkPoint offset, const SkPaint& srcPaint, const uint32_t* clusters, |
| uint32_t textByteLength, const char* utf8Text) { |
| if (0 == sourceByteCount || !sourceText) { |
| return; |
| } |
| if (this->cs().isEmpty(this->bounds())) { |
| return; |
| } |
| NOT_IMPLEMENTED(srcPaint.isVerticalText(), false); |
| if (srcPaint.isVerticalText()) { |
| // Don't pretend we support drawing vertical text. It is not |
| // clear to me how to switch to "vertical writing" mode in PDF. |
| // Currently neither Chromium or Android set this flag. |
| // https://bug.skia.org/5665 |
| } |
| if (srcPaint.getPathEffect() |
| || srcPaint.getMaskFilter() |
| || SkPaint::kFill_Style != srcPaint.getStyle()) { |
| // Stroked Text doesn't work well with Type3 fonts. |
| SkPath path = draw_text_as_path(sourceText, sourceByteCount, pos, |
| positioning, offset, srcPaint); |
| this->drawPath(path, srcPaint, nullptr, true); |
| return; |
| } |
| SkPaint paint = calculate_text_paint(srcPaint); |
| remove_color_filter(&paint); |
| replace_srcmode_on_opaque_paint(&paint); |
| 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; |
| } |
| int glyphCount = paint.textToGlyphs(sourceText, sourceByteCount, nullptr); |
| if (glyphCount <= 0) { |
| return; |
| } |
| |
| // These three heap buffers are only used in the case where no glyphs |
| // are passed to drawText() (most clients pass glyphs or a textblob). |
| TextStorage storage; |
| const SkGlyphID* glyphs = nullptr; |
| Clusterator clusterator; |
| if (textByteLength > 0) { |
| SkASSERT(glyphCount == SkToInt(sourceByteCount / sizeof(SkGlyphID))); |
| glyphs = (const SkGlyphID*)sourceText; |
| clusterator = Clusterator(clusters, utf8Text, SkToU32(glyphCount), textByteLength); |
| SkASSERT(clusters); |
| SkASSERT(utf8Text); |
| SkASSERT(srcPaint.getTextEncoding() == SkPaint::kGlyphID_TextEncoding); |
| SkASSERT(glyphCount == paint.textToGlyphs(sourceText, sourceByteCount, nullptr)); |
| } else if (SkPaint::kGlyphID_TextEncoding == srcPaint.getTextEncoding()) { |
| SkASSERT(glyphCount == SkToInt(sourceByteCount / sizeof(SkGlyphID))); |
| glyphs = (const SkGlyphID*)sourceText; |
| clusterator = Clusterator(SkToU32(glyphCount)); |
| SkASSERT(glyphCount == paint.textToGlyphs(sourceText, sourceByteCount, nullptr)); |
| SkASSERT(nullptr == clusters); |
| SkASSERT(nullptr == utf8Text); |
| } else { |
| SkASSERT(nullptr == clusters); |
| SkASSERT(nullptr == utf8Text); |
| clusterator = make_clusterator(sourceText, sourceByteCount, srcPaint, |
| &storage, glyphCount); |
| glyphs = storage.fGlyphStorage; |
| } |
| bool defaultPositioning = (positioning == SkTextBlob::kDefault_Positioning); |
| paint.setHinting(SkPaint::kNo_Hinting); |
| |
| int emSize; |
| SkAutoGlyphCache 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; |
| |
| SkPaint::Align alignment = paint.getTextAlign(); |
| float alignmentFactor = SkPaint::kLeft_Align == alignment ? 0.0f : |
| SkPaint::kCenter_Align == alignment ? -0.5f : |
| /* SkPaint::kRight_Align */ -1.0f; |
| if (defaultPositioning && alignment != SkPaint::kLeft_Align) { |
| SkScalar advance = 0; |
| for (int i = 0; i < glyphCount; ++i) { |
| advance += advanceScale * glyphCache->getGlyphIDAdvance(glyphs[i]).fAdvanceX; |
| } |
| offset.offset(alignmentFactor * advance, 0); |
| } |
| SkRect clipStackBounds = this->cs().bounds(this->bounds()); |
| struct PositionedGlyph { |
| SkPoint fPos; |
| SkGlyphID fGlyph; |
| }; |
| SkTArray<PositionedGlyph> fMissingGlyphs; |
| { |
| ScopedContentEntry content(this, paint, true); |
| if (!content.entry()) { |
| return; |
| } |
| SkDynamicMemoryWStream* out = content.stream(); |
| const SkTDArray<SkUnichar>& glyphToUnicode = metrics->fGlyphToUnicode; |
| |
| out->writeText("BT\n"); |
| SK_AT_SCOPE_EXIT(out->writeText("ET\n")); |
| |
| const SkGlyphID maxGlyphID = SkToU16(typeface->countGlyphs() - 1); |
| |
| bool multiByteGlyphs = SkPDFFont::IsMultiByte(SkPDFFont::FontType(*metrics)); |
| if (clusterator.reversedChars()) { |
| out->writeText("/ReversedChars BMC\n"); |
| } |
| SK_AT_SCOPE_EXIT(if (clusterator.reversedChars()) { out->writeText("EMC\n"); } ); |
| GlyphPositioner glyphPositioner(out, |
| paint.getTextSkewX(), |
| multiByteGlyphs, |
| defaultPositioning, |
| offset); |
| SkPDFFont* font = nullptr; |
| |
| while (Clusterator::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 = SkUTF8_NextUnicharWithError(&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 = SkUTF8_NextUnicharWithError(&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. |
| int fontIndex = this->getFontResourceIndex(typeface, gid); |
| // All preconditions for SkPDFFont::GetFontResource are met. |
| SkASSERT(fontIndex >= 0); |
| if (fontIndex < 0) { |
| return; |
| } |
| glyphPositioner.flush(); |
| update_font(out, fontIndex, textSize); |
| font = fFontResources[fontIndex]; |
| SkASSERT(font); // All preconditions for SkPDFFont::GetFontResource are met. |
| if (!font) { |
| return; |
| } |
| SkASSERT(font->multiByteGlyphs() == multiByteGlyphs); |
| } |
| SkPoint xy = {0, 0}; |
| SkScalar advance = advanceScale * glyphCache->getGlyphIDAdvance(gid).fAdvanceX; |
| if (!defaultPositioning) { |
| xy = SkTextBlob::kFull_Positioning == positioning |
| ? SkPoint{pos[2 * index], pos[2 * index + 1]} |
| : SkPoint{pos[index], 0}; |
| if (alignment != SkPaint::kLeft_Align) { |
| xy.offset(alignmentFactor * advance, 0); |
| } |
| // 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 |
| } |
| } |
| if (!has_outline_glyph(gid, glyphCache.get())) { |
| fMissingGlyphs.push_back({xy + offset, gid}); |
| } |
| } else { |
| if (!has_outline_glyph(gid, glyphCache.get())) { |
| fMissingGlyphs.push_back({offset, gid}); |
| } |
| offset += SkPoint{advance, 0}; |
| } |
| font->noteGlyphUsage(gid); |
| |
| SkGlyphID encodedGlyph = multiByteGlyphs ? gid : font->glyphToPDFFontEncoding(gid); |
| glyphPositioner.writeGlyph(xy, advance, encodedGlyph); |
| } |
| } |
| } |
| if (fMissingGlyphs.count() > 0) { |
| // Fall back on images. |
| SkPaint scaledGlyphCachePaint; |
| scaledGlyphCachePaint.setTextSize(paint.getTextSize()); |
| scaledGlyphCachePaint.setTextScaleX(paint.getTextScaleX()); |
| scaledGlyphCachePaint.setTextSkewX(paint.getTextSkewX()); |
| scaledGlyphCachePaint.setTypeface(sk_ref_sp(typeface)); |
| SkAutoGlyphCache scaledGlyphCache(scaledGlyphCachePaint, nullptr, nullptr); |
| SkTHashMap<SkPDFCanon::BitmapGlyphKey, SkPDFCanon::BitmapGlyph>* map = |
| &this->getCanon()->fBitmapGlyphImages; |
| for (PositionedGlyph positionedGlyph : fMissingGlyphs) { |
| SkPDFCanon::BitmapGlyphKey key = {typeface->uniqueID(), |
| paint.getTextSize(), |
| paint.getTextScaleX(), |
| paint.getTextSkewX(), |
| positionedGlyph.fGlyph, |
| 0}; |
| SkImage* img = nullptr; |
| SkIPoint imgOffset = {0, 0}; |
| if (SkPDFCanon::BitmapGlyph* ptr = map->find(key)) { |
| img = ptr->fImage.get(); |
| imgOffset = ptr->fOffset; |
| } else { |
| (void)scaledGlyphCache->findImage( |
| scaledGlyphCache->getGlyphIDMetrics(positionedGlyph.fGlyph)); |
| SkMask mask; |
| scaledGlyphCache->getGlyphIDMetrics(positionedGlyph.fGlyph).toMask(&mask); |
| imgOffset = {mask.fBounds.x(), mask.fBounds.y()}; |
| img = map->set(key, {image_from_mask(mask), imgOffset})->fImage.get(); |
| } |
| if (img) { |
| SkPoint pt = positionedGlyph.fPos + |
| SkPoint{(SkScalar)imgOffset.x(), (SkScalar)imgOffset.y()}; |
| this->drawImage(img, pt.x(), pt.y(), srcPaint); |
| } |
| } |
| } |
| } |
| |
| void SkPDFDevice::drawText(const void* text, size_t len, |
| SkScalar x, SkScalar y, const SkPaint& paint) { |
| this->internalDrawText(text, len, nullptr, SkTextBlob::kDefault_Positioning, |
| SkPoint{x, y}, paint, nullptr, 0, nullptr); |
| } |
| |
| void SkPDFDevice::drawPosText(const void* text, size_t len, |
| const SkScalar pos[], int scalarsPerPos, |
| const SkPoint& offset, const SkPaint& paint) { |
| this->internalDrawText(text, len, pos, (SkTextBlob::GlyphPositioning)scalarsPerPos, |
| offset, paint, nullptr, 0, nullptr); |
| } |
| |
| void SkPDFDevice::drawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y, |
| const SkPaint &paint, SkDrawFilter* drawFilter) { |
| for (SkTextBlobRunIterator it(blob); !it.done(); it.next()) { |
| SkPaint runPaint(paint); |
| it.applyFontToPaint(&runPaint); |
| if (drawFilter && !drawFilter->filter(&runPaint, SkDrawFilter::kText_Type)) { |
| continue; |
| } |
| runPaint.setFlags(this->filterTextFlags(runPaint)); |
| SkPoint offset = it.offset() + SkPoint{x, y}; |
| this->internalDrawText(it.glyphs(), sizeof(SkGlyphID) * it.glyphCount(), |
| it.pos(), it.positioning(), offset, runPaint, |
| it.clusters(), it.textSize(), it.text()); |
| } |
| } |
| |
| void SkPDFDevice::drawVertices(const SkVertices*, SkBlendMode, const SkPaint&) { |
| if (this->cs().isEmpty(this->bounds())) { |
| return; |
| } |
| // TODO: implement drawVertices |
| } |
| |
| 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.entry()) { |
| return; |
| } |
| if (content.needShape()) { |
| SkPath shape; |
| shape.addRect(SkRect::MakeXYWH(SkIntToScalar(x), SkIntToScalar(y), |
| SkIntToScalar(device->width()), |
| SkIntToScalar(device->height()))); |
| content.setShape(shape); |
| } |
| if (!content.needSource()) { |
| return; |
| } |
| |
| sk_sp<SkPDFObject> xObject = pdfDevice->makeFormXObjectFromDevice(); |
| SkPDFUtils::DrawFormXObject(this->addXObjectResource(xObject.get()), content.stream()); |
| } |
| |
| sk_sp<SkSurface> SkPDFDevice::makeSurface(const SkImageInfo& info, const SkSurfaceProps& props) { |
| return SkSurface::MakeRaster(info, &props); |
| } |
| |
| |
| sk_sp<SkPDFDict> SkPDFDevice::makeResourceDict() const { |
| SkTDArray<SkPDFObject*> fonts; |
| fonts.setReserve(fFontResources.count()); |
| for (SkPDFFont* font : fFontResources) { |
| fonts.push(font); |
| } |
| return SkPDFResourceDict::Make( |
| &fGraphicStateResources, |
| &fShaderResources, |
| &fXObjectResources, |
| &fonts); |
| } |
| |
| sk_sp<SkPDFArray> SkPDFDevice::copyMediaBox() const { |
| auto mediaBox = sk_make_sp<SkPDFArray>(); |
| mediaBox->reserve(4); |
| mediaBox->appendInt(0); |
| mediaBox->appendInt(0); |
| mediaBox->appendInt(fPageSize.width()); |
| mediaBox->appendInt(fPageSize.height()); |
| return mediaBox; |
| } |
| |
| std::unique_ptr<SkStreamAsset> SkPDFDevice::content() const { |
| SkDynamicMemoryWStream buffer; |
| if (fInitialTransform.getType() != SkMatrix::kIdentity_Mask) { |
| SkPDFUtils::AppendTransform(fInitialTransform, &buffer); |
| } |
| |
| GraphicStackState gsState(fExistingClipStack, &buffer); |
| for (const auto& entry : fContentEntries) { |
| gsState.updateClip(entry.fState.fClipStack, |
| {0, 0}, SkRect::Make(this->bounds())); |
| gsState.updateMatrix(entry.fState.fMatrix); |
| gsState.updateDrawingState(entry.fState); |
| |
| entry.fContent.writeToStream(&buffer); |
| } |
| gsState.drainStack(); |
| if (buffer.bytesWritten() > 0) { |
| return std::unique_ptr<SkStreamAsset>(buffer.detachAsStream()); |
| } else { |
| return skstd::make_unique<SkMemoryStream>(); |
| } |
| } |
| |
| /* 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, |
| const SkMatrix* prePathMatrix) { |
| if (!origPath.isInverseFillType()) { |
| return false; |
| } |
| |
| if (this->cs().isEmpty(this->bounds())) { |
| 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, nullptr, 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 (prePathMatrix) { |
| totalMatrix.preConcat(*prePathMatrix); |
| } |
| 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, prePathMatrix, true); |
| return true; |
| } |
| |
| void SkPDFDevice::appendAnnotations(SkPDFArray* array) const { |
| array->reserve(fLinkToURLs.count() + fLinkToDestinations.count()); |
| for (const RectWithData& rectWithURL : fLinkToURLs) { |
| SkRect r; |
| fInitialTransform.mapRect(&r, rectWithURL.rect); |
| array->appendObject(create_link_to_url(rectWithURL.data.get(), r)); |
| } |
| for (const RectWithData& linkToDestination : fLinkToDestinations) { |
| SkRect r; |
| fInitialTransform.mapRect(&r, linkToDestination.rect); |
| array->appendObject( |
| create_link_named_dest(linkToDestination.data.get(), r)); |
| } |
| } |
| |
| 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(), this->copyMediaBox(), |
| 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->cleanUp(); // Reset this device to have no content. |
| this->init(); |
| return xobject; |
| } |
| |
| void SkPDFDevice::drawFormXObjectWithMask(int xObjectIndex, |
| sk_sp<SkPDFObject> mask, |
| const SkClipStack& clipStack, |
| SkBlendMode mode, |
| bool invertClip) { |
| if (!invertClip && clipStack.isEmpty(this->bounds())) { |
| return; |
| } |
| |
| sk_sp<SkPDFDict> sMaskGS = SkPDFGraphicState::GetSMaskGraphicState( |
| std::move(mask), invertClip, |
| SkPDFGraphicState::kAlpha_SMaskMode, fDocument->canon()); |
| |
| SkPaint paint; |
| paint.setBlendMode(mode); |
| ScopedContentEntry content(this, clipStack, SkMatrix::I(), paint); |
| if (!content.entry()) { |
| return; |
| } |
| SkPDFUtils::ApplyGraphicState(addGraphicStateResource(sMaskGS.get()), content.stream()); |
| SkPDFUtils::DrawFormXObject(xObjectIndex, content.stream()); |
| this->clearMaskOnGraphicState(content.stream()); |
| } |
| |
| SkPDFDevice::ContentEntry* SkPDFDevice::setUpContentEntry(const SkClipStack& clipStack, |
| const SkMatrix& matrix, |
| const SkPaint& paint, |
| bool hasText, |
| sk_sp<SkPDFObject>* dst) { |
| *dst = nullptr; |
| SkBlendMode blendMode = paint.getBlendMode(); |
| |
| // For the following modes, we want to handle source and destination |
| // separately, so make an object of what's already there. |
| if (blendMode == SkBlendMode::kClear || |
| blendMode == SkBlendMode::kSrc || |
| blendMode == SkBlendMode::kSrcIn || |
| blendMode == SkBlendMode::kDstIn || |
| blendMode == SkBlendMode::kSrcOut || |
| blendMode == SkBlendMode::kDstOut || |
| blendMode == SkBlendMode::kSrcATop || |
| blendMode == SkBlendMode::kDstATop || |
| blendMode == SkBlendMode::kModulate) { |
| 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. |
| |
| // Dst xfer mode doesn't draw source at all. |
| if (blendMode == SkBlendMode::kDst) { |
| return nullptr; |
| } |
| |
| SkPDFDevice::ContentEntry* entry; |
| if (fContentEntries.back() && fContentEntries.back()->fContent.bytesWritten() == 0) { |
| entry = fContentEntries.back(); |
| } else if (blendMode != SkBlendMode::kDstOver) { |
| entry = fContentEntries.emplace_back(); |
| } else { |
| entry = fContentEntries.emplace_front(); |
| } |
| populateGraphicStateEntryFromPaint(matrix, clipStack, paint, hasText, &entry->fState); |
| return entry; |
| } |
| |
| void SkPDFDevice::finishContentEntry(SkBlendMode blendMode, |
| sk_sp<SkPDFObject> dst, |
| SkPath* shape) { |
| if (blendMode != SkBlendMode::kClear && |
| blendMode != SkBlendMode::kSrc && |
| blendMode != SkBlendMode::kDstOver && |
| blendMode != SkBlendMode::kSrcIn && |
| blendMode != SkBlendMode::kDstIn && |
| blendMode != SkBlendMode::kSrcOut && |
| blendMode != SkBlendMode::kDstOut && |
| blendMode != SkBlendMode::kSrcATop && |
| blendMode != SkBlendMode::kDstATop && |
| blendMode != SkBlendMode::kModulate) { |
| SkASSERT(!dst); |
| return; |
| } |
| if (blendMode == SkBlendMode::kDstOver) { |
| SkASSERT(!dst); |
| if (fContentEntries.front()->fContent.bytesWritten() == 0) { |
| // For DstOver, an empty content entry was inserted before the rest |
| // of the content entries. If nothing was drawn, it needs to be |
| // removed. |
| fContentEntries.pop_front(); |
| } |
| return; |
| } |
| if (!dst) { |
| SkASSERT(blendMode == SkBlendMode::kSrc || |
| blendMode == SkBlendMode::kSrcOut); |
| return; |
| } |
| |
| SkASSERT(dst); |
| SkASSERT(fContentEntries.count() == 1); |
| // 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. |
| |
| SkClipStack clipStack = fContentEntries.front()->fState.fClipStack; |
| |
| SkPaint stockPaint; |
| |
| sk_sp<SkPDFObject> srcFormXObject; |
| if (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, fExistingClipStack, SkMatrix::I(), stockPaint); |
| // TODO: addXObjectResource take sk_sp |
| SkPDFUtils::DrawFormXObject(this->addXObjectResource(dst.get()), content.stream()); |
| return; |
| } else { |
| blendMode = SkBlendMode::kClear; |
| } |
| } else { |
| SkASSERT(fContentEntries.count() == 1); |
| 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. |
| drawFormXObjectWithMask(addXObjectResource(srcFormXObject.get()), dst, |
| fExistingClipStack, SkBlendMode::kSrcOver, true); |
| } else { |
| if (shape != nullptr) { |
| // Draw shape into a form-xobject. |
| SkPaint filledPaint; |
| filledPaint.setColor(SK_ColorBLACK); |
| filledPaint.setStyle(SkPaint::kFill_Style); |
| this->internalDrawPath(clipStack, SkMatrix::I(), *shape, filledPaint, nullptr, true); |
| this->drawFormXObjectWithMask(this->addXObjectResource(dst.get()), |
| this->makeFormXObjectFromDevice(), |
| fExistingClipStack, |
| SkBlendMode::kSrcOver, true); |
| } else { |
| this->drawFormXObjectWithMask(this->addXObjectResource(dst.get()), |
| srcFormXObject, |
| fExistingClipStack, |
| SkBlendMode::kSrcOver, true); |
| } |
| } |
| |
| if (blendMode == SkBlendMode::kClear) { |
| return; |
| } else if (blendMode == SkBlendMode::kSrc || |
| blendMode == SkBlendMode::kDstATop) { |
| ScopedContentEntry content(this, fExistingClipStack, SkMatrix::I(), stockPaint); |
| if (content.entry()) { |
| SkPDFUtils::DrawFormXObject(this->addXObjectResource(srcFormXObject.get()), |
| content.stream()); |
| } |
| if (blendMode == SkBlendMode::kSrc) { |
| return; |
| } |
| } else if (blendMode == SkBlendMode::kSrcATop) { |
| ScopedContentEntry content(this, fExistingClipStack, |
| SkMatrix::I(), stockPaint); |
| if (content.entry()) { |
| SkPDFUtils::DrawFormXObject(this->addXObjectResource(dst.get()), 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) { |
| drawFormXObjectWithMask(addXObjectResource(srcFormXObject.get()), |
| std::move(dst), |
| fExistingClipStack, |
| SkBlendMode::kSrcOver, |
| blendMode == SkBlendMode::kSrcOut); |
| return; |
| } else { |
| SkBlendMode mode = SkBlendMode::kSrcOver; |
| int resourceID = addXObjectResource(dst.get()); |
| if (blendMode == SkBlendMode::kModulate) { |
| drawFormXObjectWithMask(addXObjectResource(srcFormXObject.get()), |
| std::move(dst), fExistingClipStack, |
| SkBlendMode::kSrcOver, false); |
| mode = SkBlendMode::kMultiply; |
| } |
| drawFormXObjectWithMask(resourceID, std::move(srcFormXObject), |
| fExistingClipStack, mode, |
| blendMode == SkBlendMode::kDstOut); |
| return; |
| } |
| } |
| |
| bool SkPDFDevice::isContentEmpty() { |
| if (!fContentEntries.front() || fContentEntries.front()->fContent.bytesWritten() == 0) { |
| SkASSERT(fContentEntries.count() <= 1); |
| return true; |
| } |
| return false; |
| } |
| |
| 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->fClipStack = clipStack; |
| entry->fColor = SkColorSetA(paint.getColor(), 0xFF); |
| 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(); |
| SkColor color = paint.getColor(); |
| 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); |
| entry->fColor = SkColorSetA(gradientColor, 0xFF); |
| color = gradientColor; |
| } 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.bounds(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.get()) { |
| // pdfShader has been canonicalized so we can directly compare |
| // pointers. |
| int resourceIndex = fShaderResources.find(pdfShader.get()); |
| if (resourceIndex < 0) { |
| resourceIndex = fShaderResources.count(); |
| fShaderResources.push(pdfShader.get()); |
| pdfShader.get()->ref(); |
| } |
| entry->fShaderIndex = resourceIndex; |
| } |
| } |
| } |
| |
| sk_sp<SkPDFDict> newGraphicState; |
| if (color == paint.getColor()) { |
| newGraphicState = SkPDFGraphicState::GetGraphicStateForPaint(fDocument->canon(), paint); |
| } else { |
| SkPaint newPaint = paint; |
| newPaint.setColor(color); |
| newGraphicState = SkPDFGraphicState::GetGraphicStateForPaint(fDocument->canon(), newPaint); |
| } |
| int resourceIndex = addGraphicStateResource(newGraphicState.get()); |
| entry->fGraphicStateIndex = resourceIndex; |
| |
| if (hasText) { |
| entry->fTextScaleX = paint.getTextScaleX(); |
| entry->fTextFill = paint.getStyle(); |
| } else { |
| entry->fTextScaleX = 0; |
| } |
| } |
| |
| int SkPDFDevice::addGraphicStateResource(SkPDFObject* gs) { |
| // Assumes that gs has been canonicalized (so we can directly compare |
| // pointers). |
| int result = fGraphicStateResources.find(gs); |
| if (result < 0) { |
| result = fGraphicStateResources.count(); |
| fGraphicStateResources.push(gs); |
| gs->ref(); |
| } |
| return result; |
| } |
| |
| int SkPDFDevice::addXObjectResource(SkPDFObject* xObject) { |
| // TODO(halcanary): make this take a sk_sp<SkPDFObject> |
| // Assumes that xobject has been canonicalized (so we can directly compare |
| // pointers). |
| int result = fXObjectResources.find(xObject); |
| if (result < 0) { |
| result = fXObjectResources.count(); |
| fXObjectResources.push(SkRef(xObject)); |
| } |
| return result; |
| } |
| |
| int SkPDFDevice::getFontResourceIndex(SkTypeface* typeface, uint16_t glyphID) { |
| sk_sp<SkPDFFont> newFont = SkPDFFont::GetFontResource(fDocument->canon(), typeface, glyphID); |
| if (!newFont) { |
| return -1; |
| } |
| int resourceIndex = fFontResources.find(newFont.get()); |
| if (resourceIndex < 0) { |
| fDocument->registerFont(newFont.get()); |
| resourceIndex = fFontResources.count(); |
| fFontResources.push(newFont.release()); |
| } |
| return resourceIndex; |
| } |
| |
| 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 (!imageSubset) { |
| return; |
| } |
| |
| SkIRect bounds = imageSubset.image()->bounds(); |
| SkPaint paint = srcPaint; |
| if (imageSubset.image()->isOpaque()) { |
| replace_srcmode_on_opaque_paint(&paint); |
| } |
| 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; |
| } |
| } |
| |
| // TODO(halcanary) support isAlphaOnly & getMaskFilter. |
| bool imageAlphaOnly = imageSubset.image()->isAlphaOnly() && !paint.getMaskFilter(); |
| if (imageAlphaOnly) { |
| if (SkColorFilter* colorFilter = paint.getColorFilter()) { |
| sk_sp<SkImage> img = color_filter(imageSubset.image().get(), colorFilter); |
| paint.setColorFilter(nullptr); |
| imageSubset = SkKeyedImage(std::move(img)); |
| if (!imageSubset) { |
| return; |
| } |
| imageAlphaOnly = imageSubset.image()->isAlphaOnly(); |
| // The colorfilter can make a alphonly image no longer be alphaonly. |
| } |
| } |
| if (imageAlphaOnly) { |
| 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.get()); |
| canvas.concat(transform); |
| canvas.concat(ctm); |
| // TODO(halcanary): investigate sub-pixel clipping. |
| canvas.drawImage(mask, 0, 0); |
| } |
| remove_color_filter(&paint); |
| 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.entry()) { |
| return; |
| } |
| this->addSMaskGraphicState(std::move(maskDevice), content.stream()); |
| SkPDFUtils::AppendRectangle(SkRect::Make(fPageSize), 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; |
| path.addRect(SkRect::Make(imageSubset.image()->bounds())); |
| this->internalDrawPath(this->cs(), this->ctm(), path, paint, &transform, 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()) { |
| SkASSERT(fDocument->rasterDpi() > 0); |
| // Transform the bitmap in the new space, without taking into |
| // account the initial transform. |
| SkPath perspectiveOutline; |
| SkRect imageBounds = SkRect::Make(imageSubset.image()->bounds()); |
| perspectiveOutline.addRect(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); |
| SkScalar dpiScale = SkIntToScalar(fDocument->rasterDpi()) / |
| SkIntToScalar(SkPDFUtils::kDpiForRasterScaleOne); |
| total.postScale(dpiScale, dpiScale); |
| |
| SkPath physicalPerspectiveOutline; |
| physicalPerspectiveOutline.addRect(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.entry()) { |
| return; |
| } |
| if (content.needShape()) { |
| SkPath shape; |
| shape.addRect(SkRect::Make(subset)); |
| shape.transform(matrix); |
| content.setShape(shape); |
| } |
| if (!content.needSource()) { |
| return; |
| } |
| |
| if (SkColorFilter* colorFilter = paint.getColorFilter()) { |
| // TODO(https://bug.skia.org/4378): implement colorfilter on other |
| // draw calls. This code here works for all |
| // drawBitmap*()/drawImage*() calls amd ImageFilters (which |
| // rasterize a layer on this backend). Fortuanely, this seems |
| // to be how Chromium impements most color-filters. |
| 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->canon()->fPixelSerializer.get()); |
| if (!pdfimage) { |
| return; |
| } |
| fDocument->serialize(pdfimage); // serialize images early. |
| SkASSERT((key != SkBitmapKey{{0, 0, 0, 0}, 0})); |
| fDocument->canon()->fPDFBitmapMap.set(key, pdfimage); |
| } |
| // TODO(halcanary): addXObjectResource() should take a sk_sp<SkPDFObject> |
| SkPDFUtils::DrawFormXObject(this->addXObjectResource(pdfimage.get()), 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) { |
| 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 space? For now, run the filter |
| // in the same color space as the source (this is different from all other backends). |
| SkImageFilter::OutputProperties outputProperties(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) { |
| // TODO: See comment above in drawSpecial. The color mode we use for decode should be driven |
| // by the destination where we're going to draw thing thing (ie this device). But we don't have |
| // a color space, so we always decode in legacy mode for now. |
| SkColorSpace* legacyColorSpace = nullptr; |
| return SkSpecialImage::MakeFromImage(image->bounds(), |
| image->makeNonTextureImage(), legacyColorSpace); |
| } |
| |
| 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); |
| } |