| /* |
| * 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 "SkAnnotation.h" |
| #include "SkColor.h" |
| #include "SkColorFilter.h" |
| #include "SkClipStack.h" |
| #include "SkData.h" |
| #include "SkDraw.h" |
| #include "SkGlyphCache.h" |
| #include "SkPaint.h" |
| #include "SkPath.h" |
| #include "SkPathOps.h" |
| #include "SkPDFBitmap.h" |
| #include "SkPDFCanon.h" |
| #include "SkPDFFont.h" |
| #include "SkPDFFormXObject.h" |
| #include "SkPDFGraphicState.h" |
| #include "SkPDFResourceDict.h" |
| #include "SkPDFShader.h" |
| #include "SkPDFStream.h" |
| #include "SkPDFTypes.h" |
| #include "SkPDFUtils.h" |
| #include "SkRasterClip.h" |
| #include "SkRect.h" |
| #include "SkRRect.h" |
| #include "SkString.h" |
| #include "SkSurface.h" |
| #include "SkTextFormatParams.h" |
| #include "SkTemplates.h" |
| #include "SkTypefacePriv.h" |
| #include "SkXfermodeInterpretation.h" |
| |
| #define DPI_FOR_RASTER_SCALE_ONE 72 |
| |
| // Utility functions |
| |
| // If the paint will definitely draw opaquely, replace kSrc_Mode with |
| // kSrcOver_Mode. http://crbug.com/473572 |
| static void replace_srcmode_on_opaque_paint(SkPaint* paint) { |
| if (kSrcOver_SkXfermodeInterpretation |
| == SkInterpretXfermode(*paint, false)) { |
| paint->setXfermode(nullptr); |
| } |
| } |
| |
| static void emit_pdf_color(SkColor color, SkWStream* result) { |
| SkASSERT(SkColorGetA(color) == 0xFF); // We handle alpha elsewhere. |
| SkScalar colorScale = SkScalarInvert(0xFF); |
| SkPDFUtils::AppendScalar(SkColorGetR(color) * colorScale, result); |
| result->writeText(" "); |
| SkPDFUtils::AppendScalar(SkColorGetG(color) * colorScale, result); |
| result->writeText(" "); |
| SkPDFUtils::AppendScalar(SkColorGetB(color) * colorScale, 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 = SkScalarMul(result.getTextSize(), fakeBoldScale); |
| if (result.getStyle() == SkPaint::kFill_Style) { |
| result.setStyle(SkPaint::kStrokeAndFill_Style); |
| } else { |
| width += result.getStrokeWidth(); |
| } |
| result.setStrokeWidth(width); |
| } |
| return result; |
| } |
| |
| // Stolen from measure_text in SkDraw.cpp and then tweaked. |
| static void align_text(SkDrawCacheProc glyphCacheProc, const SkPaint& paint, |
| const uint16_t* glyphs, size_t len, |
| SkScalar* x, SkScalar* y) { |
| if (paint.getTextAlign() == SkPaint::kLeft_Align) { |
| return; |
| } |
| |
| SkMatrix ident; |
| ident.reset(); |
| SkAutoGlyphCache autoCache(paint, nullptr, &ident); |
| SkGlyphCache* cache = autoCache.getCache(); |
| |
| const char* start = reinterpret_cast<const char*>(glyphs); |
| const char* stop = reinterpret_cast<const char*>(glyphs + len); |
| SkFixed xAdv = 0, yAdv = 0; |
| |
| // TODO(vandebo): This probably needs to take kerning into account. |
| while (start < stop) { |
| const SkGlyph& glyph = glyphCacheProc(cache, &start, 0, 0); |
| xAdv += glyph.fAdvanceX; |
| yAdv += glyph.fAdvanceY; |
| }; |
| if (paint.getTextAlign() == SkPaint::kLeft_Align) { |
| return; |
| } |
| |
| SkScalar xAdj = SkFixedToScalar(xAdv); |
| SkScalar yAdj = SkFixedToScalar(yAdv); |
| if (paint.getTextAlign() == SkPaint::kCenter_Align) { |
| xAdj = SkScalarHalf(xAdj); |
| yAdj = SkScalarHalf(yAdj); |
| } |
| *x = *x - xAdj; |
| *y = *y - yAdj; |
| } |
| |
| static int max_glyphid_for_typeface(SkTypeface* typeface) { |
| SkAutoResolveDefaultTypeface autoResolve(typeface); |
| typeface = autoResolve.get(); |
| return typeface->countGlyphs() - 1; |
| } |
| |
| typedef SkAutoSTMalloc<128, uint16_t> SkGlyphStorage; |
| |
| static int force_glyph_encoding(const SkPaint& paint, const void* text, |
| size_t len, SkGlyphStorage* storage, |
| const uint16_t** glyphIDs) { |
| // Make sure we have a glyph id encoding. |
| if (paint.getTextEncoding() != SkPaint::kGlyphID_TextEncoding) { |
| int numGlyphs = paint.textToGlyphs(text, len, nullptr); |
| storage->reset(numGlyphs); |
| paint.textToGlyphs(text, len, storage->get()); |
| *glyphIDs = storage->get(); |
| return numGlyphs; |
| } |
| |
| // For user supplied glyph ids we need to validate them. |
| SkASSERT((len & 1) == 0); |
| int numGlyphs = SkToInt(len / 2); |
| const uint16_t* input = static_cast<const uint16_t*>(text); |
| |
| int maxGlyphID = max_glyphid_for_typeface(paint.getTypeface()); |
| int validated; |
| for (validated = 0; validated < numGlyphs; ++validated) { |
| if (input[validated] > maxGlyphID) { |
| break; |
| } |
| } |
| if (validated >= numGlyphs) { |
| *glyphIDs = static_cast<const uint16_t*>(text); |
| return numGlyphs; |
| } |
| |
| // Silently drop anything out of range. |
| storage->reset(numGlyphs); |
| if (validated > 0) { |
| memcpy(storage->get(), input, validated * sizeof(uint16_t)); |
| } |
| |
| for (int i = validated; i < numGlyphs; ++i) { |
| storage->get()[i] = input[i]; |
| if (input[i] > maxGlyphID) { |
| storage->get()[i] = 0; |
| } |
| } |
| *glyphIDs = storage->get(); |
| return numGlyphs; |
| } |
| |
| static void set_text_transform(SkScalar x, SkScalar y, SkScalar textSkewX, |
| SkWStream* content) { |
| // Flip the text about the x-axis to account for origin swap and include |
| // the passed parameters. |
| content->writeText("1 0 "); |
| SkPDFUtils::AppendScalar(0 - textSkewX, content); |
| content->writeText(" -1 "); |
| SkPDFUtils::AppendScalar(x, content); |
| content->writeText(" "); |
| SkPDFUtils::AppendScalar(y, content); |
| content->writeText(" Tm\n"); |
| } |
| |
| // It is important to not confuse GraphicStateEntry with SkPDFGraphicState, the |
| // later being our representation of an object in the PDF file. |
| struct GraphicStateEntry { |
| GraphicStateEntry(); |
| |
| // Compare the fields we care about when setting up a new content entry. |
| bool compareInitialState(const GraphicStateEntry& b); |
| |
| SkMatrix fMatrix; |
| // We can't do set operations on Paths, though PDF natively supports |
| // intersect. If the clip stack does anything other than intersect, |
| // we have to fall back to the region. Treat fClipStack as authoritative. |
| // See http://code.google.com/p/skia/issues/detail?id=221 |
| SkClipStack fClipStack; |
| SkRegion fClipRegion; |
| |
| // When emitting the content entry, we will ensure the graphic state |
| // is set to these values first. |
| SkColor fColor; |
| SkScalar fTextScaleX; // Zero means we don't care what the value is. |
| SkPaint::Style fTextFill; // Only if TextScaleX is non-zero. |
| int fShaderIndex; |
| int fGraphicStateIndex; |
| |
| // We may change the font (i.e. for Type1 support) within a |
| // ContentEntry. This is the one currently in effect, or nullptr if none. |
| SkPDFFont* fFont; |
| // In PDF, text size has no default value. It is only valid if fFont is |
| // not nullptr. |
| SkScalar fTextSize; |
| }; |
| |
| GraphicStateEntry::GraphicStateEntry() : fColor(SK_ColorBLACK), |
| fTextScaleX(SK_Scalar1), |
| fTextFill(SkPaint::kFill_Style), |
| fShaderIndex(-1), |
| fGraphicStateIndex(-1), |
| fFont(nullptr), |
| fTextSize(SK_ScalarNaN) { |
| fMatrix.reset(); |
| } |
| |
| bool 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, |
| const SkRegion& existingClipRegion, |
| SkWStream* contentStream) |
| : fStackDepth(0), |
| fContentStream(contentStream) { |
| fEntries[0].fClipStack = existingClipStack; |
| fEntries[0].fClipRegion = existingClipRegion; |
| } |
| |
| void updateClip(const SkClipStack& clipStack, const SkRegion& clipRegion, |
| const SkPoint& translation); |
| void updateMatrix(const SkMatrix& matrix); |
| void updateDrawingState(const GraphicStateEntry& state); |
| |
| void drainStack(); |
| |
| private: |
| void push(); |
| void pop(); |
| GraphicStateEntry* currentEntry() { return &fEntries[fStackDepth]; } |
| |
| // Conservative limit on save depth, see impl. notes in PDF 1.4 spec. |
| static const int kMaxStackDepth = 12; |
| 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--; |
| } |
| |
| // This function initializes iter to be an iterator on the "stack" argument |
| // and then skips over the leading entries as specified in prefix. It requires |
| // and asserts that "prefix" will be a prefix to "stack." |
| static void skip_clip_stack_prefix(const SkClipStack& prefix, |
| const SkClipStack& stack, |
| SkClipStack::Iter* iter) { |
| SkClipStack::B2TIter prefixIter(prefix); |
| iter->reset(stack, SkClipStack::Iter::kBottom_IterStart); |
| |
| const SkClipStack::Element* prefixEntry; |
| const SkClipStack::Element* iterEntry; |
| |
| for (prefixEntry = prefixIter.next(); prefixEntry; |
| prefixEntry = prefixIter.next()) { |
| iterEntry = iter->next(); |
| SkASSERT(iterEntry); |
| // Because of SkClipStack does internal intersection, the last clip |
| // entry may differ. |
| if (*prefixEntry != *iterEntry) { |
| SkASSERT(prefixEntry->getOp() == SkRegion::kIntersect_Op); |
| SkASSERT(iterEntry->getOp() == SkRegion::kIntersect_Op); |
| SkASSERT(iterEntry->getType() == prefixEntry->getType()); |
| // back up the iterator by one |
| iter->prev(); |
| prefixEntry = prefixIter.next(); |
| break; |
| } |
| } |
| |
| SkASSERT(prefixEntry == nullptr); |
| } |
| |
| static void emit_clip(SkPath* clipPath, SkRect* clipRect, |
| SkWStream* contentStream) { |
| SkASSERT(clipPath || clipRect); |
| |
| SkPath::FillType clipFill; |
| if (clipPath) { |
| SkPDFUtils::EmitPath(*clipPath, SkPaint::kFill_Style, contentStream); |
| clipFill = clipPath->getFillType(); |
| } else { |
| SkPDFUtils::AppendRectangle(*clipRect, contentStream); |
| clipFill = SkPath::kWinding_FillType; |
| } |
| |
| NOT_IMPLEMENTED(clipFill == SkPath::kInverseEvenOdd_FillType, false); |
| NOT_IMPLEMENTED(clipFill == SkPath::kInverseWinding_FillType, false); |
| if (clipFill == SkPath::kEvenOdd_FillType) { |
| contentStream->writeText("W* n\n"); |
| } else { |
| contentStream->writeText("W n\n"); |
| } |
| } |
| |
| /* 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); |
| } |
| |
| #ifdef SK_PDF_USE_PATHOPS_CLIPPING |
| // Sanity check the numerical values of the SkRegion ops and PathOps ops |
| // enums so region_op_to_pathops_op can do a straight passthrough cast. |
| // If these are failing, it may be necessary to make region_op_to_pathops_op |
| // do more. |
| static_assert(SkRegion::kDifference_Op == (int)kDifference_SkPathOp, "region_pathop_mismatch"); |
| static_assert(SkRegion::kIntersect_Op == (int)kIntersect_SkPathOp, "region_pathop_mismatch"); |
| static_assert(SkRegion::kUnion_Op == (int)kUnion_SkPathOp, "region_pathop_mismatch"); |
| static_assert(SkRegion::kXOR_Op == (int)kXOR_SkPathOp, "region_pathop_mismatch"); |
| static_assert(SkRegion::kReverseDifference_Op == (int)kReverseDifference_SkPathOp, |
| "region_pathop_mismatch"); |
| |
| static SkPathOp region_op_to_pathops_op(SkRegion::Op op) { |
| SkASSERT(op >= 0); |
| SkASSERT(op <= SkRegion::kReverseDifference_Op); |
| return (SkPathOp)op; |
| } |
| |
| /* 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 SkRegion& clipRegion, |
| 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 (SkRegion::kReplace_Op == clipEntry->getOp()) { |
| *outClipPath = entryPath; |
| } else { |
| SkPathOp op = region_op_to_pathops_op(clipEntry->getOp()); |
| if (!Op(*outClipPath, entryPath, op, 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 = SkRect::Make(clipRegion.getBounds()); |
| clipBounds.outset(SK_Scalar1, SK_Scalar1); |
| if (!calculate_inverse_path(clipBounds, *outClipPath, outClipPath)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| #endif |
| |
| // 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 SkRegion& clipRegion, |
| const SkPoint& translation) { |
| if (clipStack == currentEntry()->fClipStack) { |
| return; |
| } |
| |
| while (fStackDepth > 0) { |
| pop(); |
| if (clipStack == currentEntry()->fClipStack) { |
| return; |
| } |
| } |
| push(); |
| |
| currentEntry()->fClipStack = clipStack; |
| currentEntry()->fClipRegion = clipRegion; |
| |
| SkMatrix transform; |
| transform.setTranslate(translation.fX, translation.fY); |
| |
| #ifdef SK_PDF_USE_PATHOPS_CLIPPING |
| SkPath clipPath; |
| if (get_clip_stack_path(transform, clipStack, clipRegion, &clipPath)) { |
| emit_clip(&clipPath, nullptr, fContentStream); |
| return; |
| } |
| #endif |
| // gsState->initialEntry()->fClipStack/Region specifies the clip that has |
| // already been applied. (If this is a top level device, then it specifies |
| // a clip to the content area. If this is a layer, then it specifies |
| // the clip in effect when the layer was created.) There's no need to |
| // reapply that clip; SKCanvas's SkDrawIter will draw anything outside the |
| // initial clip on the parent layer. (This means there's a bug if the user |
| // expands the clip and then uses any xfer mode that uses dst: |
| // http://code.google.com/p/skia/issues/detail?id=228 ) |
| SkClipStack::Iter iter; |
| skip_clip_stack_prefix(fEntries[0].fClipStack, clipStack, &iter); |
| |
| // If the clip stack does anything other than intersect or if it uses |
| // an inverse fill type, we have to fall back to the clip region. |
| bool needRegion = false; |
| const SkClipStack::Element* clipEntry; |
| for (clipEntry = iter.next(); clipEntry; clipEntry = iter.next()) { |
| if (clipEntry->getOp() != SkRegion::kIntersect_Op || |
| clipEntry->isInverseFilled()) { |
| needRegion = true; |
| break; |
| } |
| } |
| |
| if (needRegion) { |
| SkPath clipPath; |
| SkAssertResult(clipRegion.getBoundaryPath(&clipPath)); |
| emit_clip(&clipPath, nullptr, fContentStream); |
| } else { |
| skip_clip_stack_prefix(fEntries[0].fClipStack, clipStack, &iter); |
| const SkClipStack::Element* clipEntry; |
| for (clipEntry = iter.next(); clipEntry; clipEntry = iter.next()) { |
| SkASSERT(clipEntry->getOp() == SkRegion::kIntersect_Op); |
| switch (clipEntry->getType()) { |
| case SkClipStack::Element::kRect_Type: { |
| SkRect translatedClip; |
| transform.mapRect(&translatedClip, clipEntry->getRect()); |
| emit_clip(nullptr, &translatedClip, fContentStream); |
| break; |
| } |
| default: { |
| SkPath translatedPath; |
| clipEntry->asPath(&translatedPath); |
| translatedPath.transform(transform, &translatedPath); |
| emit_clip(&translatedPath, nullptr, fContentStream); |
| break; |
| } |
| } |
| } |
| } |
| } |
| |
| 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 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 = SkScalarMul(state.fTextScaleX, |
| SkIntToScalar(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 (cinfo.fForImageFilter || |
| (layerPaint && not_supported_for_layers(*layerPaint))) { |
| return nullptr; |
| } |
| SkISize size = SkISize::Make(cinfo.fInfo.width(), cinfo.fInfo.height()); |
| return SkPDFDevice::Create(size, fRasterDpi, fCanon); |
| } |
| |
| |
| struct ContentEntry { |
| GraphicStateEntry fState; |
| SkDynamicMemoryWStream fContent; |
| SkAutoTDelete<ContentEntry> fNext; |
| |
| // If the stack is too deep we could get Stack Overflow. |
| // So we manually destruct the object. |
| ~ContentEntry() { |
| ContentEntry* val = fNext.detach(); |
| while (val != nullptr) { |
| ContentEntry* valNext = val->fNext.detach(); |
| // When the destructor is called, fNext is nullptr and exits. |
| delete val; |
| val = valNext; |
| } |
| } |
| }; |
| |
| // 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 SkDraw& draw, |
| const SkPaint& paint, bool hasText = false) |
| : fDevice(device), |
| fContentEntry(nullptr), |
| fXfermode(SkXfermode::kSrcOver_Mode), |
| fDstFormXObject(nullptr) { |
| init(draw.fClipStack, *draw.fClip, *draw.fMatrix, paint, hasText); |
| } |
| ScopedContentEntry(SkPDFDevice* device, const SkClipStack* clipStack, |
| const SkRegion& clipRegion, const SkMatrix& matrix, |
| const SkPaint& paint, bool hasText = false) |
| : fDevice(device), |
| fContentEntry(nullptr), |
| fXfermode(SkXfermode::kSrcOver_Mode), |
| fDstFormXObject(nullptr) { |
| init(clipStack, clipRegion, matrix, paint, hasText); |
| } |
| |
| ~ScopedContentEntry() { |
| if (fContentEntry) { |
| SkPath* shape = &fShape; |
| if (shape->isEmpty()) { |
| shape = nullptr; |
| } |
| fDevice->finishContentEntry(fXfermode, fDstFormXObject, shape); |
| } |
| SkSafeUnref(fDstFormXObject); |
| } |
| |
| ContentEntry* entry() { return fContentEntry; } |
| |
| /* Returns true when we explicitly need the shape of the drawing. */ |
| bool needShape() { |
| switch (fXfermode) { |
| case SkXfermode::kClear_Mode: |
| case SkXfermode::kSrc_Mode: |
| case SkXfermode::kSrcIn_Mode: |
| case SkXfermode::kSrcOut_Mode: |
| case SkXfermode::kDstIn_Mode: |
| case SkXfermode::kDstOut_Mode: |
| case SkXfermode::kSrcATop_Mode: |
| case SkXfermode::kDstATop_Mode: |
| case SkXfermode::kModulate_Mode: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| /* Returns true unless we only need the shape of the drawing. */ |
| bool needSource() { |
| if (fXfermode == SkXfermode::kClear_Mode) { |
| 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; |
| ContentEntry* fContentEntry; |
| SkXfermode::Mode fXfermode; |
| SkPDFFormXObject* fDstFormXObject; |
| SkPath fShape; |
| |
| void init(const SkClipStack* clipStack, const SkRegion& clipRegion, |
| const SkMatrix& matrix, const SkPaint& paint, bool hasText) { |
| // Shape has to be flatten before we get here. |
| if (matrix.hasPerspective()) { |
| NOT_IMPLEMENTED(!matrix.hasPerspective(), false); |
| return; |
| } |
| if (paint.getXfermode()) { |
| paint.getXfermode()->asMode(&fXfermode); |
| } |
| fContentEntry = fDevice->setUpContentEntry(clipStack, clipRegion, |
| matrix, paint, hasText, |
| &fDstFormXObject); |
| } |
| }; |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| SkPDFDevice::SkPDFDevice(SkISize pageSize, SkScalar rasterDpi, SkPDFCanon* canon, bool flip) |
| : INHERITED(SkSurfaceProps(0, kUnknown_SkPixelGeometry)) |
| , fPageSize(pageSize) |
| , fContentSize(pageSize) |
| , fExistingClipRegion(SkIRect::MakeSize(pageSize)) |
| , fLastContentEntry(nullptr) |
| , fLastMarginContentEntry(nullptr) |
| , fDrawingArea(kContent_DrawingArea) |
| , fClipStack(nullptr) |
| , fFontGlyphUsage(new SkPDFGlyphSetMap) |
| , fRasterDpi(rasterDpi) |
| , fCanon(canon) { |
| SkASSERT(pageSize.width() > 0); |
| SkASSERT(pageSize.height() > 0); |
| fLegacyBitmap.setInfo( |
| SkImageInfo::MakeUnknown(pageSize.width(), pageSize.height())); |
| if (flip) { |
| // 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(pageSize.fHeight)); |
| fInitialTransform.preScale(SK_Scalar1, -SK_Scalar1); |
| } else { |
| fInitialTransform.setIdentity(); |
| } |
| } |
| |
| SkPDFDevice::~SkPDFDevice() { |
| this->cleanUp(true); |
| } |
| |
| void SkPDFDevice::init() { |
| fContentEntries.free(); |
| fLastContentEntry = nullptr; |
| fMarginContentEntries.free(); |
| fLastMarginContentEntry = nullptr; |
| fDrawingArea = kContent_DrawingArea; |
| if (fFontGlyphUsage.get() == nullptr) { |
| fFontGlyphUsage.reset(new SkPDFGlyphSetMap); |
| } |
| } |
| |
| void SkPDFDevice::cleanUp(bool clearFontUsage) { |
| fGraphicStateResources.unrefAll(); |
| fXObjectResources.unrefAll(); |
| fFontResources.unrefAll(); |
| fShaderResources.unrefAll(); |
| fLinkToURLs.deleteAll(); |
| fLinkToDestinations.deleteAll(); |
| fNamedDestinations.deleteAll(); |
| |
| if (clearFontUsage) { |
| fFontGlyphUsage->reset(); |
| } |
| } |
| |
| void SkPDFDevice::drawPaint(const SkDraw& d, const SkPaint& paint) { |
| SkPaint newPaint = paint; |
| replace_srcmode_on_opaque_paint(&newPaint); |
| |
| newPaint.setStyle(SkPaint::kFill_Style); |
| ScopedContentEntry content(this, d, newPaint); |
| internalDrawPaint(newPaint, content.entry()); |
| } |
| |
| void SkPDFDevice::internalDrawPaint(const SkPaint& paint, |
| ContentEntry* contentEntry) { |
| if (!contentEntry) { |
| return; |
| } |
| SkRect bbox = SkRect::MakeWH(SkIntToScalar(this->width()), |
| SkIntToScalar(this->height())); |
| 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(const SkDraw& d, |
| SkCanvas::PointMode mode, |
| size_t count, |
| const SkPoint* points, |
| const SkPaint& srcPaint) { |
| SkPaint passedPaint = srcPaint; |
| replace_srcmode_on_opaque_paint(&passedPaint); |
| |
| if (count == 0) { |
| return; |
| } |
| |
| if (SkAnnotation* annotation = passedPaint.getAnnotation()) { |
| if (handlePointAnnotation(points, count, *d.fMatrix, annotation)) { |
| 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 (d.fClip->isEmpty()) { |
| return; |
| } |
| SkDraw pointDraw(d); |
| pointDraw.fDevice = this; |
| pointDraw.drawPoints(mode, count, points, passedPaint, true); |
| 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); |
| drawRect(d, r, modifiedPaint); |
| } |
| return; |
| } else { |
| modifiedPaint.setStrokeCap(SkPaint::kRound_Cap); |
| } |
| } |
| |
| ScopedContentEntry content(this, d, *paint); |
| if (!content.entry()) { |
| return; |
| } |
| |
| switch (mode) { |
| case SkCanvas::kPolygon_PointMode: |
| SkPDFUtils::MoveTo(points[0].fX, points[0].fY, |
| &content.entry()->fContent); |
| for (size_t i = 1; i < count; i++) { |
| SkPDFUtils::AppendLine(points[i].fX, points[i].fY, |
| &content.entry()->fContent); |
| } |
| SkPDFUtils::StrokePath(&content.entry()->fContent); |
| break; |
| case SkCanvas::kLines_PointMode: |
| for (size_t i = 0; i < count/2; i++) { |
| SkPDFUtils::MoveTo(points[i * 2].fX, points[i * 2].fY, |
| &content.entry()->fContent); |
| SkPDFUtils::AppendLine(points[i * 2 + 1].fX, |
| points[i * 2 + 1].fY, |
| &content.entry()->fContent); |
| SkPDFUtils::StrokePath(&content.entry()->fContent); |
| } |
| 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, |
| &content.entry()->fContent); |
| SkPDFUtils::ClosePath(&content.entry()->fContent); |
| SkPDFUtils::StrokePath(&content.entry()->fContent); |
| } |
| break; |
| default: |
| SkASSERT(false); |
| } |
| } |
| |
| static SkPDFDict* create_link_annotation(const SkRect& translatedRect) { |
| SkAutoTUnref<SkPDFDict> annotation(new SkPDFDict("Annot")); |
| annotation->insertName("Subtype", "Link"); |
| |
| SkAutoTUnref<SkPDFArray> border(new 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", border.detach()); |
| |
| SkAutoTUnref<SkPDFArray> rect(new SkPDFArray); |
| rect->reserve(4); |
| rect->appendScalar(translatedRect.fLeft); |
| rect->appendScalar(translatedRect.fTop); |
| rect->appendScalar(translatedRect.fRight); |
| rect->appendScalar(translatedRect.fBottom); |
| annotation->insertObject("Rect", rect.detach()); |
| |
| return annotation.detach(); |
| } |
| |
| static SkPDFDict* create_link_to_url(const SkData* urlData, const SkRect& r) { |
| SkAutoTUnref<SkPDFDict> annotation(create_link_annotation(r)); |
| |
| SkString url(static_cast<const char *>(urlData->data()), |
| urlData->size() - 1); |
| SkAutoTUnref<SkPDFDict> action(new SkPDFDict("Action")); |
| action->insertName("S", "URI"); |
| action->insertString("URI", url); |
| annotation->insertObject("A", action.detach()); |
| return annotation.detach(); |
| } |
| |
| static SkPDFDict* create_link_named_dest(const SkData* nameData, |
| const SkRect& r) { |
| SkAutoTUnref<SkPDFDict> annotation(create_link_annotation(r)); |
| SkString name(static_cast<const char *>(nameData->data()), |
| nameData->size() - 1); |
| annotation->insertName("Dest", name); |
| return annotation.detach(); |
| } |
| |
| void SkPDFDevice::drawRect(const SkDraw& d, |
| const SkRect& rect, |
| const SkPaint& srcPaint) { |
| SkPaint paint = srcPaint; |
| replace_srcmode_on_opaque_paint(&paint); |
| SkRect r = rect; |
| r.sort(); |
| |
| if (paint.getPathEffect()) { |
| if (d.fClip->isEmpty()) { |
| return; |
| } |
| SkPath path; |
| path.addRect(r); |
| drawPath(d, path, paint, nullptr, true); |
| return; |
| } |
| |
| if (SkAnnotation* annotation = paint.getAnnotation()) { |
| SkPath path; |
| path.addRect(rect); |
| if (handlePathAnnotation(path, d, annotation)) { |
| return; |
| } |
| } |
| |
| ScopedContentEntry content(this, d, paint); |
| if (!content.entry()) { |
| return; |
| } |
| SkPDFUtils::AppendRectangle(r, &content.entry()->fContent); |
| SkPDFUtils::PaintPath(paint.getStyle(), SkPath::kWinding_FillType, |
| &content.entry()->fContent); |
| } |
| |
| void SkPDFDevice::drawRRect(const SkDraw& draw, |
| const SkRRect& rrect, |
| const SkPaint& srcPaint) { |
| SkPaint paint = srcPaint; |
| replace_srcmode_on_opaque_paint(&paint); |
| SkPath path; |
| path.addRRect(rrect); |
| this->drawPath(draw, path, paint, nullptr, true); |
| } |
| |
| void SkPDFDevice::drawOval(const SkDraw& draw, |
| const SkRect& oval, |
| const SkPaint& srcPaint) { |
| SkPaint paint = srcPaint; |
| replace_srcmode_on_opaque_paint(&paint); |
| SkPath path; |
| path.addOval(oval); |
| this->drawPath(draw, path, paint, nullptr, true); |
| } |
| |
| void SkPDFDevice::drawPath(const SkDraw& d, |
| const SkPath& origPath, |
| const SkPaint& srcPaint, |
| const SkMatrix* prePathMatrix, |
| bool pathIsMutable) { |
| SkPaint paint = srcPaint; |
| replace_srcmode_on_opaque_paint(&paint); |
| SkPath modifiedPath; |
| SkPath* pathPtr = const_cast<SkPath*>(&origPath); |
| |
| SkMatrix matrix = *d.fMatrix; |
| 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 (d.fClip->isEmpty()) { |
| return; |
| } |
| if (!pathIsMutable) { |
| pathPtr = &modifiedPath; |
| pathIsMutable = true; |
| } |
| bool fill = paint.getFillPath(origPath, pathPtr); |
| |
| SkPaint noEffectPaint(paint); |
| noEffectPaint.setPathEffect(nullptr); |
| if (fill) { |
| noEffectPaint.setStyle(SkPaint::kFill_Style); |
| } else { |
| noEffectPaint.setStyle(SkPaint::kStroke_Style); |
| noEffectPaint.setStrokeWidth(0); |
| } |
| drawPath(d, *pathPtr, noEffectPaint, nullptr, true); |
| return; |
| } |
| |
| if (handleInversePath(d, origPath, paint, pathIsMutable, prePathMatrix)) { |
| return; |
| } |
| |
| if (SkAnnotation* annotation = paint.getAnnotation()) { |
| if (handlePathAnnotation(*pathPtr, d, annotation)) { |
| return; |
| } |
| } |
| |
| ScopedContentEntry content(this, d.fClipStack, *d.fClip, matrix, paint); |
| if (!content.entry()) { |
| return; |
| } |
| bool consumeDegeratePathSegments = |
| paint.getStyle() == SkPaint::kFill_Style || |
| (paint.getStrokeCap() != SkPaint::kRound_Cap && |
| paint.getStrokeCap() != SkPaint::kSquare_Cap); |
| SkPDFUtils::EmitPath(*pathPtr, paint.getStyle(), |
| consumeDegeratePathSegments, |
| &content.entry()->fContent); |
| SkPDFUtils::PaintPath(paint.getStyle(), pathPtr->getFillType(), |
| &content.entry()->fContent); |
| } |
| |
| void SkPDFDevice::drawBitmapRect(const SkDraw& draw, |
| const SkBitmap& bitmap, |
| const SkRect* src, |
| const SkRect& dst, |
| const SkPaint& srcPaint, |
| SkCanvas::SrcRectConstraint constraint) { |
| const SkImage* image = fCanon->bitmapToImage(bitmap); |
| if (!image) { |
| return; |
| } |
| // ownership of this image is retained by the canon. |
| this->drawImageRect(draw, image, src, dst, srcPaint, constraint); |
| } |
| |
| void SkPDFDevice::drawBitmap(const SkDraw& d, |
| const SkBitmap& bitmap, |
| const SkMatrix& matrix, |
| const SkPaint& srcPaint) { |
| SkPaint paint = srcPaint; |
| if (bitmap.isOpaque()) { |
| replace_srcmode_on_opaque_paint(&paint); |
| } |
| |
| if (d.fClip->isEmpty()) { |
| return; |
| } |
| |
| SkMatrix transform = matrix; |
| transform.postConcat(*d.fMatrix); |
| const SkImage* image = fCanon->bitmapToImage(bitmap); |
| if (!image) { |
| return; |
| } |
| this->internalDrawImage(transform, d.fClipStack, *d.fClip, image, nullptr, |
| paint); |
| } |
| |
| void SkPDFDevice::drawSprite(const SkDraw& d, |
| const SkBitmap& bitmap, |
| int x, |
| int y, |
| const SkPaint& srcPaint) { |
| SkPaint paint = srcPaint; |
| if (bitmap.isOpaque()) { |
| replace_srcmode_on_opaque_paint(&paint); |
| } |
| |
| if (d.fClip->isEmpty()) { |
| return; |
| } |
| |
| SkMatrix matrix; |
| matrix.setTranslate(SkIntToScalar(x), SkIntToScalar(y)); |
| const SkImage* image = fCanon->bitmapToImage(bitmap); |
| if (!image) { |
| return; |
| } |
| this->internalDrawImage(matrix, d.fClipStack, *d.fClip, image, nullptr, |
| paint); |
| } |
| |
| void SkPDFDevice::drawImage(const SkDraw& draw, |
| const SkImage* image, |
| SkScalar x, |
| SkScalar y, |
| const SkPaint& srcPaint) { |
| SkPaint paint = srcPaint; |
| if (!image) { |
| return; |
| } |
| if (image->isOpaque()) { |
| replace_srcmode_on_opaque_paint(&paint); |
| } |
| if (draw.fClip->isEmpty()) { |
| return; |
| } |
| SkMatrix transform = SkMatrix::MakeTrans(x, y); |
| transform.postConcat(*draw.fMatrix); |
| this->internalDrawImage(transform, draw.fClipStack, *draw.fClip, image, |
| nullptr, paint); |
| } |
| |
| void SkPDFDevice::drawImageRect(const SkDraw& draw, |
| const SkImage* image, |
| const SkRect* src, |
| const SkRect& dst, |
| const SkPaint& srcPaint, |
| SkCanvas::SrcRectConstraint constraint) { |
| if (!image) { |
| return; |
| } |
| if (draw.fClip->isEmpty()) { |
| return; |
| } |
| SkPaint paint = srcPaint; |
| if (image->isOpaque()) { |
| replace_srcmode_on_opaque_paint(&paint); |
| } |
| // TODO: this code path must be updated to respect the flags parameter |
| SkMatrix matrix; |
| SkRect tmpSrc, tmpDst; |
| SkRect imageBounds = SkRect::Make(image->bounds()); |
| |
| // Compute matrix from the two rectangles |
| if (src) { |
| tmpSrc = *src; |
| } else { |
| tmpSrc = imageBounds; |
| } |
| matrix.setRectToRect(tmpSrc, dst, SkMatrix::kFill_ScaleToFit); |
| |
| // clip the tmpSrc to the bounds of the bitmap, and recompute dstRect if |
| // needed (if the src was clipped). No check needed if src==null. |
| SkAutoTUnref<const SkImage> autoImageUnref; |
| if (src) { |
| if (!imageBounds.contains(*src)) { |
| if (!tmpSrc.intersect(imageBounds)) { |
| return; // nothing to draw |
| } |
| // recompute dst, based on the smaller tmpSrc |
| matrix.mapRect(&tmpDst, tmpSrc); |
| } |
| |
| // since we may need to clamp to the borders of the src rect within |
| // the bitmap, we extract a subset. |
| SkIRect srcIR; |
| tmpSrc.roundOut(&srcIR); |
| |
| autoImageUnref.reset(image->newSubset(srcIR)); |
| if (!autoImageUnref) { |
| return; |
| } |
| image = autoImageUnref; |
| // Since we did an extract, we need to adjust the matrix accordingly |
| SkScalar dx = 0, dy = 0; |
| if (srcIR.fLeft > 0) { |
| dx = SkIntToScalar(srcIR.fLeft); |
| } |
| if (srcIR.fTop > 0) { |
| dy = SkIntToScalar(srcIR.fTop); |
| } |
| if (dx || dy) { |
| matrix.preTranslate(dx, dy); |
| } |
| } |
| matrix.postConcat(*draw.fMatrix); |
| this->internalDrawImage(matrix, draw.fClipStack, *draw.fClip, image, |
| nullptr, paint); |
| } |
| |
| // Create a PDF string. Maximum length (in bytes) is 65,535. |
| // @param input A string value. |
| // @param len The length of the input array. |
| // @param wideChars True iff the upper byte in each uint16_t is |
| // significant and should be encoded and not |
| // discarded. If true, the upper byte is encoded |
| // first. Otherwise, we assert the upper byte is |
| // zero. |
| static SkString format_wide_string(const uint16_t* input, |
| size_t len, |
| bool wideChars) { |
| if (wideChars) { |
| SkASSERT(2 * len < 65535); |
| static const char gHex[] = "0123456789ABCDEF"; |
| SkString result(4 * len + 2); |
| result[0] = '<'; |
| for (size_t i = 0; i < len; i++) { |
| result[4 * i + 1] = gHex[(input[i] >> 12) & 0xF]; |
| result[4 * i + 2] = gHex[(input[i] >> 8) & 0xF]; |
| result[4 * i + 3] = gHex[(input[i] >> 4) & 0xF]; |
| result[4 * i + 4] = gHex[(input[i] ) & 0xF]; |
| } |
| result[4 * len + 1] = '>'; |
| return result; |
| } else { |
| SkASSERT(len <= 65535); |
| SkString tmp(len); |
| for (size_t i = 0; i < len; i++) { |
| SkASSERT(0 == input[i] >> 8); |
| tmp[i] = static_cast<uint8_t>(input[i]); |
| } |
| return SkPDFUtils::FormatString(tmp.c_str(), tmp.size()); |
| } |
| } |
| |
| static void draw_transparent_text(SkPDFDevice* device, |
| const SkDraw& d, |
| const void* text, size_t len, |
| SkScalar x, SkScalar y, |
| const SkPaint& srcPaint) { |
| |
| SkPaint transparent; |
| if (!SkPDFFont::CanEmbedTypeface(transparent.getTypeface(), |
| device->getCanon())) { |
| SkDEBUGFAIL("default typeface should be embeddable"); |
| return; // Avoid infinite loop in release. |
| } |
| transparent.setTextSize(srcPaint.getTextSize()); |
| transparent.setColor(SK_ColorTRANSPARENT); |
| switch (srcPaint.getTextEncoding()) { |
| case SkPaint::kGlyphID_TextEncoding: { |
| // Since a glyphId<->Unicode mapping is typeface-specific, |
| // map back to Unicode first. |
| size_t glyphCount = len / 2; |
| SkAutoTMalloc<SkUnichar> unichars(glyphCount); |
| srcPaint.glyphsToUnichars( |
| (const uint16_t*)text, SkToInt(glyphCount), &unichars[0]); |
| transparent.setTextEncoding(SkPaint::kUTF32_TextEncoding); |
| device->drawText(d, &unichars[0], |
| glyphCount * sizeof(SkUnichar), |
| x, y, transparent); |
| break; |
| } |
| case SkPaint::kUTF8_TextEncoding: |
| case SkPaint::kUTF16_TextEncoding: |
| case SkPaint::kUTF32_TextEncoding: |
| transparent.setTextEncoding(srcPaint.getTextEncoding()); |
| device->drawText(d, text, len, x, y, transparent); |
| break; |
| default: |
| SkFAIL("unknown text encoding"); |
| } |
| } |
| |
| |
| void SkPDFDevice::drawText(const SkDraw& d, const void* text, size_t len, |
| SkScalar x, SkScalar y, const SkPaint& srcPaint) { |
| if (!SkPDFFont::CanEmbedTypeface(srcPaint.getTypeface(), fCanon)) { |
| // https://bug.skia.org/3866 |
| SkPath path; |
| srcPaint.getTextPath(text, len, x, y, &path); |
| this->drawPath(d, path, srcPaint, &SkMatrix::I(), true); |
| // Draw text transparently to make it copyable/searchable/accessable. |
| draw_transparent_text(this, d, text, len, x, y, srcPaint); |
| return; |
| } |
| SkPaint paint = srcPaint; |
| replace_srcmode_on_opaque_paint(&paint); |
| |
| NOT_IMPLEMENTED(paint.getMaskFilter() != nullptr, false); |
| if (paint.getMaskFilter() != nullptr) { |
| // Don't pretend we support drawing MaskFilters, it makes for artifacts |
| // making text unreadable (e.g. same text twice when using CSS shadows). |
| return; |
| } |
| SkPaint textPaint = calculate_text_paint(paint); |
| ScopedContentEntry content(this, d, textPaint, true); |
| if (!content.entry()) { |
| return; |
| } |
| |
| SkGlyphStorage storage(0); |
| const uint16_t* glyphIDs = nullptr; |
| int numGlyphs = force_glyph_encoding(paint, text, len, &storage, &glyphIDs); |
| textPaint.setTextEncoding(SkPaint::kGlyphID_TextEncoding); |
| |
| SkDrawCacheProc glyphCacheProc = textPaint.getDrawCacheProc(); |
| align_text(glyphCacheProc, textPaint, glyphIDs, numGlyphs, &x, &y); |
| content.entry()->fContent.writeText("BT\n"); |
| set_text_transform(x, y, textPaint.getTextSkewX(), |
| &content.entry()->fContent); |
| int consumedGlyphCount = 0; |
| |
| SkTDArray<uint16_t> glyphIDsCopy(glyphIDs, numGlyphs); |
| |
| while (numGlyphs > consumedGlyphCount) { |
| this->updateFont(textPaint, glyphIDs[consumedGlyphCount], content.entry()); |
| SkPDFFont* font = content.entry()->fState.fFont; |
| |
| int availableGlyphs = font->glyphsToPDFFontEncoding( |
| glyphIDsCopy.begin() + consumedGlyphCount, |
| numGlyphs - consumedGlyphCount); |
| fFontGlyphUsage->noteGlyphUsage( |
| font, glyphIDsCopy.begin() + consumedGlyphCount, |
| availableGlyphs); |
| SkString encodedString = |
| format_wide_string(glyphIDsCopy.begin() + consumedGlyphCount, |
| availableGlyphs, font->multiByteGlyphs()); |
| content.entry()->fContent.writeText(encodedString.c_str()); |
| consumedGlyphCount += availableGlyphs; |
| content.entry()->fContent.writeText(" Tj\n"); |
| } |
| content.entry()->fContent.writeText("ET\n"); |
| } |
| |
| void SkPDFDevice::drawPosText(const SkDraw& d, const void* text, size_t len, |
| const SkScalar pos[], int scalarsPerPos, |
| const SkPoint& offset, const SkPaint& srcPaint) { |
| if (!SkPDFFont::CanEmbedTypeface(srcPaint.getTypeface(), fCanon)) { |
| const SkPoint* positions = reinterpret_cast<const SkPoint*>(pos); |
| SkAutoTMalloc<SkPoint> positionsBuffer; |
| if (2 != scalarsPerPos) { |
| int glyphCount = srcPaint.textToGlyphs(text, len, NULL); |
| positionsBuffer.reset(glyphCount); |
| for (int i = 0; i < glyphCount; ++i) { |
| positionsBuffer[i].set(pos[i], 0.0f); |
| } |
| positions = &positionsBuffer[0]; |
| } |
| SkPath path; |
| srcPaint.getPosTextPath(text, len, positions, &path); |
| SkMatrix matrix; |
| matrix.setTranslate(offset); |
| this->drawPath(d, path, srcPaint, &matrix, true); |
| // Draw text transparently to make it copyable/searchable/accessable. |
| draw_transparent_text( |
| this, d, text, len, offset.x() + positions[0].x(), |
| offset.y() + positions[0].y(), srcPaint); |
| return; |
| } |
| |
| SkPaint paint = srcPaint; |
| replace_srcmode_on_opaque_paint(&paint); |
| |
| NOT_IMPLEMENTED(paint.getMaskFilter() != nullptr, false); |
| if (paint.getMaskFilter() != nullptr) { |
| // Don't pretend we support drawing MaskFilters, it makes for artifacts |
| // making text unreadable (e.g. same text twice when using CSS shadows). |
| return; |
| } |
| SkASSERT(1 == scalarsPerPos || 2 == scalarsPerPos); |
| SkPaint textPaint = calculate_text_paint(paint); |
| ScopedContentEntry content(this, d, textPaint, true); |
| if (!content.entry()) { |
| return; |
| } |
| |
| SkGlyphStorage storage(0); |
| const uint16_t* glyphIDs = nullptr; |
| size_t numGlyphs = force_glyph_encoding(paint, text, len, &storage, &glyphIDs); |
| textPaint.setTextEncoding(SkPaint::kGlyphID_TextEncoding); |
| |
| SkDrawCacheProc glyphCacheProc = textPaint.getDrawCacheProc(); |
| content.entry()->fContent.writeText("BT\n"); |
| this->updateFont(textPaint, glyphIDs[0], content.entry()); |
| for (size_t i = 0; i < numGlyphs; i++) { |
| SkPDFFont* font = content.entry()->fState.fFont; |
| uint16_t encodedValue = glyphIDs[i]; |
| if (font->glyphsToPDFFontEncoding(&encodedValue, 1) != 1) { |
| // The current pdf font cannot encode the current glyph. |
| // Try to get a pdf font which can encode the current glyph. |
| this->updateFont(textPaint, glyphIDs[i], content.entry()); |
| font = content.entry()->fState.fFont; |
| if (font->glyphsToPDFFontEncoding(&encodedValue, 1) != 1) { |
| SkDEBUGFAIL("PDF could not encode glyph."); |
| continue; |
| } |
| } |
| |
| fFontGlyphUsage->noteGlyphUsage(font, &encodedValue, 1); |
| SkScalar x = offset.x() + pos[i * scalarsPerPos]; |
| SkScalar y = offset.y() + (2 == scalarsPerPos ? pos[i * scalarsPerPos + 1] : 0); |
| |
| align_text(glyphCacheProc, textPaint, glyphIDs + i, 1, &x, &y); |
| set_text_transform(x, y, textPaint.getTextSkewX(), &content.entry()->fContent); |
| SkString encodedString = |
| format_wide_string(&encodedValue, 1, font->multiByteGlyphs()); |
| content.entry()->fContent.writeText(encodedString.c_str()); |
| content.entry()->fContent.writeText(" Tj\n"); |
| } |
| content.entry()->fContent.writeText("ET\n"); |
| } |
| |
| void SkPDFDevice::drawVertices(const SkDraw& d, SkCanvas::VertexMode, |
| int vertexCount, const SkPoint verts[], |
| const SkPoint texs[], const SkColor colors[], |
| SkXfermode* xmode, const uint16_t indices[], |
| int indexCount, const SkPaint& paint) { |
| if (d.fClip->isEmpty()) { |
| return; |
| } |
| // TODO: implement drawVertices |
| } |
| |
| struct RectWithData { |
| SkRect rect; |
| SkAutoTUnref<const SkData> data; |
| |
| RectWithData(const SkRect& rect, const SkData* data) |
| : rect(rect), data(SkRef(data)) {} |
| }; |
| |
| struct NamedDestination { |
| SkAutoTUnref<const SkData> nameData; |
| SkPoint point; |
| |
| NamedDestination(const SkData* nameData, const SkPoint& point) |
| : nameData(SkRef(nameData)), point(point) {} |
| }; |
| |
| void SkPDFDevice::drawDevice(const SkDraw& d, SkBaseDevice* device, |
| int x, int y, const SkPaint& paint) { |
| // our onCreateCompatibleDevice() always creates SkPDFDevice subclasses. |
| SkPDFDevice* pdfDevice = static_cast<SkPDFDevice*>(device); |
| |
| SkScalar scalarX = SkIntToScalar(x); |
| SkScalar scalarY = SkIntToScalar(y); |
| for (RectWithData* link : pdfDevice->fLinkToURLs) { |
| fLinkToURLs.push(new RectWithData( |
| link->rect.makeOffset(scalarX, scalarY), link->data)); |
| } |
| for (RectWithData* link : pdfDevice->fLinkToDestinations) { |
| fLinkToDestinations.push(new RectWithData( |
| link->rect.makeOffset(scalarX, scalarY), link->data)); |
| } |
| for (NamedDestination* d : pdfDevice->fNamedDestinations) { |
| fNamedDestinations.push(new NamedDestination( |
| d->nameData, d->point + SkPoint::Make(scalarX, scalarY))); |
| } |
| |
| if (pdfDevice->isContentEmpty()) { |
| return; |
| } |
| |
| SkMatrix matrix; |
| matrix.setTranslate(SkIntToScalar(x), SkIntToScalar(y)); |
| ScopedContentEntry content(this, d.fClipStack, *d.fClip, 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; |
| } |
| |
| SkAutoTUnref<SkPDFFormXObject> xObject(new SkPDFFormXObject(pdfDevice)); |
| SkPDFUtils::DrawFormXObject(this->addXObjectResource(xObject.get()), |
| &content.entry()->fContent); |
| |
| // Merge glyph sets from the drawn device. |
| fFontGlyphUsage->merge(pdfDevice->getFontGlyphUsage()); |
| } |
| |
| SkImageInfo SkPDFDevice::imageInfo() const { |
| return fLegacyBitmap.info(); |
| } |
| |
| void SkPDFDevice::onAttachToCanvas(SkCanvas* canvas) { |
| INHERITED::onAttachToCanvas(canvas); |
| |
| // Canvas promises that this ptr is valid until onDetachFromCanvas is called |
| fClipStack = canvas->getClipStack(); |
| } |
| |
| void SkPDFDevice::onDetachFromCanvas() { |
| INHERITED::onDetachFromCanvas(); |
| |
| fClipStack = nullptr; |
| } |
| |
| SkSurface* SkPDFDevice::newSurface(const SkImageInfo& info, const SkSurfaceProps& props) { |
| return SkSurface::NewRaster(info, &props); |
| } |
| |
| ContentEntry* SkPDFDevice::getLastContentEntry() { |
| if (fDrawingArea == kContent_DrawingArea) { |
| return fLastContentEntry; |
| } else { |
| return fLastMarginContentEntry; |
| } |
| } |
| |
| SkAutoTDelete<ContentEntry>* SkPDFDevice::getContentEntries() { |
| if (fDrawingArea == kContent_DrawingArea) { |
| return &fContentEntries; |
| } else { |
| return &fMarginContentEntries; |
| } |
| } |
| |
| void SkPDFDevice::setLastContentEntry(ContentEntry* contentEntry) { |
| if (fDrawingArea == kContent_DrawingArea) { |
| fLastContentEntry = contentEntry; |
| } else { |
| fLastMarginContentEntry = contentEntry; |
| } |
| } |
| |
| void SkPDFDevice::setDrawingArea(DrawingArea drawingArea) { |
| // A ScopedContentEntry only exists during the course of a draw call, so |
| // this can't be called while a ScopedContentEntry exists. |
| fDrawingArea = drawingArea; |
| } |
| |
| SkPDFDict* SkPDFDevice::createResourceDict() const { |
| SkTDArray<SkPDFObject*> fonts; |
| fonts.setReserve(fFontResources.count()); |
| for (SkPDFFont* font : fFontResources) { |
| fonts.push(font); |
| } |
| return SkPDFResourceDict::Create( |
| &fGraphicStateResources, |
| &fShaderResources, |
| &fXObjectResources, |
| &fonts); |
| } |
| |
| const SkTDArray<SkPDFFont*>& SkPDFDevice::getFontResources() const { |
| return fFontResources; |
| } |
| |
| SkPDFArray* SkPDFDevice::copyMediaBox() const { |
| // should this be a singleton? |
| |
| SkAutoTUnref<SkPDFArray> mediaBox(new SkPDFArray); |
| mediaBox->reserve(4); |
| mediaBox->appendInt(0); |
| mediaBox->appendInt(0); |
| mediaBox->appendInt(fPageSize.fWidth); |
| mediaBox->appendInt(fPageSize.fHeight); |
| return mediaBox.detach(); |
| } |
| |
| SkStreamAsset* SkPDFDevice::content() const { |
| SkDynamicMemoryWStream buffer; |
| this->writeContent(&buffer); |
| return buffer.bytesWritten() > 0 |
| ? buffer.detachAsStream() |
| : new SkMemoryStream; |
| } |
| |
| void SkPDFDevice::copyContentEntriesToData(ContentEntry* entry, |
| SkWStream* data) const { |
| // TODO(ctguil): For margins, I'm not sure fExistingClipStack/Region is the |
| // right thing to pass here. |
| GraphicStackState gsState(fExistingClipStack, fExistingClipRegion, data); |
| while (entry != nullptr) { |
| SkPoint translation; |
| translation.iset(this->getOrigin()); |
| translation.negate(); |
| gsState.updateClip(entry->fState.fClipStack, entry->fState.fClipRegion, |
| translation); |
| gsState.updateMatrix(entry->fState.fMatrix); |
| gsState.updateDrawingState(entry->fState); |
| |
| entry->fContent.writeToStream(data); |
| entry = entry->fNext.get(); |
| } |
| gsState.drainStack(); |
| } |
| |
| void SkPDFDevice::writeContent(SkWStream* out) const { |
| if (fInitialTransform.getType() != SkMatrix::kIdentity_Mask) { |
| SkPDFUtils::AppendTransform(fInitialTransform, out); |
| } |
| |
| // TODO(aayushkumar): Apply clip along the margins. Currently, webkit |
| // colors the contentArea white before it starts drawing into it and |
| // that currently acts as our clip. |
| // Also, think about adding a transform here (or assume that the values |
| // sent across account for that) |
| SkPDFDevice::copyContentEntriesToData(fMarginContentEntries.get(), out); |
| |
| // If the content area is the entire page, then we don't need to clip |
| // the content area (PDF area clips to the page size). Otherwise, |
| // we have to clip to the content area; we've already applied the |
| // initial transform, so just clip to the device size. |
| if (fPageSize != fContentSize) { |
| SkRect r = SkRect::MakeWH(SkIntToScalar(this->width()), |
| SkIntToScalar(this->height())); |
| emit_clip(nullptr, &r, out); |
| } |
| |
| SkPDFDevice::copyContentEntriesToData(fContentEntries.get(), out); |
| } |
| |
| /* 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 SkDraw& d, const SkPath& origPath, |
| const SkPaint& paint, bool pathIsMutable, |
| const SkMatrix* prePathMatrix) { |
| if (!origPath.isInverseFillType()) { |
| return false; |
| } |
| |
| if (d.fClip->isEmpty()) { |
| 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(); |
| drawPath(d, modifiedPath, paint, nullptr, true); |
| return true; |
| } |
| } |
| |
| // Get bounds of clip in current transform space |
| // (clip bounds are given in device space). |
| SkRect bounds; |
| SkMatrix transformInverse; |
| SkMatrix totalMatrix = *d.fMatrix; |
| if (prePathMatrix) { |
| totalMatrix.preConcat(*prePathMatrix); |
| } |
| if (!totalMatrix.invert(&transformInverse)) { |
| return false; |
| } |
| bounds.set(d.fClip->getBounds()); |
| 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; |
| } |
| |
| drawPath(d, modifiedPath, noInversePaint, prePathMatrix, true); |
| return true; |
| } |
| |
| bool SkPDFDevice::handlePointAnnotation(const SkPoint* points, size_t count, |
| const SkMatrix& matrix, |
| SkAnnotation* annotationInfo) { |
| SkData* nameData = annotationInfo->find( |
| SkAnnotationKeys::Define_Named_Dest_Key()); |
| if (nameData) { |
| for (size_t i = 0; i < count; i++) { |
| SkPoint transformedPoint; |
| matrix.mapXY(points[i].x(), points[i].y(), &transformedPoint); |
| fNamedDestinations.push(new NamedDestination(nameData, transformedPoint)); |
| } |
| return true; |
| } |
| return false; |
| } |
| |
| bool SkPDFDevice::handlePathAnnotation(const SkPath& path, |
| const SkDraw& d, |
| SkAnnotation* annotation) { |
| SkASSERT(annotation); |
| |
| SkPath transformedPath = path; |
| transformedPath.transform(*d.fMatrix); |
| SkRasterClip clip = *d.fRC; |
| clip.op(transformedPath, SkIRect::MakeWH(width(), height()), SkRegion::kIntersect_Op, |
| false); |
| SkRect transformedRect = SkRect::Make(clip.getBounds()); |
| |
| SkData* urlData = annotation->find(SkAnnotationKeys::URL_Key()); |
| if (urlData) { |
| if (!transformedRect.isEmpty()) { |
| fLinkToURLs.push(new RectWithData(transformedRect, urlData)); |
| } |
| return true; |
| } |
| |
| SkData* linkToDestination = |
| annotation->find(SkAnnotationKeys::Link_Named_Dest_Key()); |
| if (linkToDestination) { |
| if (!transformedRect.isEmpty()) { |
| fLinkToDestinations.push(new RectWithData(transformedRect, linkToDestination)); |
| } |
| return true; |
| } |
| |
| return false; |
| } |
| |
| void SkPDFDevice::appendAnnotations(SkPDFArray* array) const { |
| array->reserve(fLinkToURLs.count() + fLinkToDestinations.count()); |
| for (RectWithData* rectWithURL : fLinkToURLs) { |
| SkRect r; |
| fInitialTransform.mapRect(&r, rectWithURL->rect); |
| array->appendObject(create_link_to_url(rectWithURL->data, r)); |
| } |
| for (RectWithData* linkToDestination : fLinkToDestinations) { |
| SkRect r; |
| fInitialTransform.mapRect(&r, linkToDestination->rect); |
| array->appendObject(create_link_named_dest(linkToDestination->data, r)); |
| } |
| } |
| |
| void SkPDFDevice::appendDestinations(SkPDFDict* dict, SkPDFObject* page) const { |
| for (NamedDestination* dest : fNamedDestinations) { |
| SkAutoTUnref<SkPDFArray> pdfDest(new SkPDFArray); |
| pdfDest->reserve(5); |
| pdfDest->appendObjRef(SkRef(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, pdfDest.detach()); |
| } |
| } |
| |
| SkPDFFormXObject* SkPDFDevice::createFormXObjectFromDevice() { |
| SkPDFFormXObject* xobject = new SkPDFFormXObject(this); |
| // 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. |
| cleanUp(false); // Reset this device to have no content. |
| init(); |
| return xobject; |
| } |
| |
| void SkPDFDevice::drawFormXObjectWithMask(int xObjectIndex, |
| SkPDFFormXObject* mask, |
| const SkClipStack* clipStack, |
| const SkRegion& clipRegion, |
| SkXfermode::Mode mode, |
| bool invertClip) { |
| if (clipRegion.isEmpty() && !invertClip) { |
| return; |
| } |
| |
| SkAutoTUnref<SkPDFObject> sMaskGS(SkPDFGraphicState::GetSMaskGraphicState( |
| mask, invertClip, SkPDFGraphicState::kAlpha_SMaskMode)); |
| |
| SkMatrix identity; |
| identity.reset(); |
| SkPaint paint; |
| paint.setXfermodeMode(mode); |
| ScopedContentEntry content(this, clipStack, clipRegion, identity, paint); |
| if (!content.entry()) { |
| return; |
| } |
| SkPDFUtils::ApplyGraphicState(addGraphicStateResource(sMaskGS.get()), |
| &content.entry()->fContent); |
| SkPDFUtils::DrawFormXObject(xObjectIndex, &content.entry()->fContent); |
| |
| sMaskGS.reset(SkPDFGraphicState::GetNoSMaskGraphicState()); |
| SkPDFUtils::ApplyGraphicState(addGraphicStateResource(sMaskGS.get()), |
| &content.entry()->fContent); |
| } |
| |
| ContentEntry* SkPDFDevice::setUpContentEntry(const SkClipStack* clipStack, |
| const SkRegion& clipRegion, |
| const SkMatrix& matrix, |
| const SkPaint& paint, |
| bool hasText, |
| SkPDFFormXObject** dst) { |
| *dst = nullptr; |
| if (clipRegion.isEmpty()) { |
| return nullptr; |
| } |
| |
| // The clip stack can come from an SkDraw where it is technically optional. |
| SkClipStack synthesizedClipStack; |
| if (clipStack == nullptr) { |
| if (clipRegion == fExistingClipRegion) { |
| clipStack = &fExistingClipStack; |
| } else { |
| // GraphicStackState::updateClip expects the clip stack to have |
| // fExistingClip as a prefix, so start there, then set the clip |
| // to the passed region. |
| synthesizedClipStack = fExistingClipStack; |
| SkPath clipPath; |
| clipRegion.getBoundaryPath(&clipPath); |
| synthesizedClipStack.clipDevPath(clipPath, SkRegion::kReplace_Op, |
| false); |
| clipStack = &synthesizedClipStack; |
| } |
| } |
| |
| SkXfermode::Mode xfermode = SkXfermode::kSrcOver_Mode; |
| if (paint.getXfermode()) { |
| paint.getXfermode()->asMode(&xfermode); |
| } |
| |
| // For the following modes, we want to handle source and destination |
| // separately, so make an object of what's already there. |
| if (xfermode == SkXfermode::kClear_Mode || |
| xfermode == SkXfermode::kSrc_Mode || |
| xfermode == SkXfermode::kSrcIn_Mode || |
| xfermode == SkXfermode::kDstIn_Mode || |
| xfermode == SkXfermode::kSrcOut_Mode || |
| xfermode == SkXfermode::kDstOut_Mode || |
| xfermode == SkXfermode::kSrcATop_Mode || |
| xfermode == SkXfermode::kDstATop_Mode || |
| xfermode == SkXfermode::kModulate_Mode) { |
| if (!isContentEmpty()) { |
| *dst = createFormXObjectFromDevice(); |
| SkASSERT(isContentEmpty()); |
| } else if (xfermode != SkXfermode::kSrc_Mode && |
| xfermode != SkXfermode::kSrcOut_Mode) { |
| // 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 (xfermode == SkXfermode::kDst_Mode) { |
| return nullptr; |
| } |
| |
| ContentEntry* entry; |
| SkAutoTDelete<ContentEntry> newEntry; |
| |
| ContentEntry* lastContentEntry = getLastContentEntry(); |
| if (lastContentEntry && lastContentEntry->fContent.getOffset() == 0) { |
| entry = lastContentEntry; |
| } else { |
| newEntry.reset(new ContentEntry); |
| entry = newEntry.get(); |
| } |
| |
| populateGraphicStateEntryFromPaint(matrix, *clipStack, clipRegion, paint, |
| hasText, &entry->fState); |
| if (lastContentEntry && xfermode != SkXfermode::kDstOver_Mode && |
| entry->fState.compareInitialState(lastContentEntry->fState)) { |
| return lastContentEntry; |
| } |
| |
| SkAutoTDelete<ContentEntry>* contentEntries = getContentEntries(); |
| if (!lastContentEntry) { |
| contentEntries->reset(entry); |
| setLastContentEntry(entry); |
| } else if (xfermode == SkXfermode::kDstOver_Mode) { |
| entry->fNext.reset(contentEntries->detach()); |
| contentEntries->reset(entry); |
| } else { |
| lastContentEntry->fNext.reset(entry); |
| setLastContentEntry(entry); |
| } |
| newEntry.detach(); |
| return entry; |
| } |
| |
| void SkPDFDevice::finishContentEntry(SkXfermode::Mode xfermode, |
| SkPDFFormXObject* dst, |
| SkPath* shape) { |
| if (xfermode != SkXfermode::kClear_Mode && |
| xfermode != SkXfermode::kSrc_Mode && |
| xfermode != SkXfermode::kDstOver_Mode && |
| xfermode != SkXfermode::kSrcIn_Mode && |
| xfermode != SkXfermode::kDstIn_Mode && |
| xfermode != SkXfermode::kSrcOut_Mode && |
| xfermode != SkXfermode::kDstOut_Mode && |
| xfermode != SkXfermode::kSrcATop_Mode && |
| xfermode != SkXfermode::kDstATop_Mode && |
| xfermode != SkXfermode::kModulate_Mode) { |
| SkASSERT(!dst); |
| return; |
| } |
| if (xfermode == SkXfermode::kDstOver_Mode) { |
| SkASSERT(!dst); |
| ContentEntry* firstContentEntry = getContentEntries()->get(); |
| if (firstContentEntry->fContent.getOffset() == 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. |
| SkAutoTDelete<ContentEntry>* contentEntries = getContentEntries(); |
| contentEntries->reset(firstContentEntry->fNext.detach()); |
| } |
| return; |
| } |
| if (!dst) { |
| SkASSERT(xfermode == SkXfermode::kSrc_Mode || |
| xfermode == SkXfermode::kSrcOut_Mode); |
| return; |
| } |
| |
| ContentEntry* contentEntries = getContentEntries()->get(); |
| SkASSERT(dst); |
| SkASSERT(!contentEntries->fNext.get()); |
| // 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 = contentEntries->fState.fClipStack; |
| SkRegion clipRegion = contentEntries->fState.fClipRegion; |
| |
| SkMatrix identity; |
| identity.reset(); |
| SkPaint stockPaint; |
| |
| SkAutoTUnref<SkPDFFormXObject> 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 || xfermode == SkXfermode::kDstOut_Mode || |
| xfermode == SkXfermode::kSrcATop_Mode) { |
| ScopedContentEntry content(this, &fExistingClipStack, |
| fExistingClipRegion, identity, |
| stockPaint); |
| SkPDFUtils::DrawFormXObject(this->addXObjectResource(dst), |
| &content.entry()->fContent); |
| return; |
| } else { |
| xfermode = SkXfermode::kClear_Mode; |
| } |
| } else { |
| SkASSERT(!fContentEntries->fNext.get()); |
| srcFormXObject.reset(createFormXObjectFromDevice()); |
| } |
| |
| // TODO(vandebo) srcFormXObject may contain alpha, but here we want it |
| // without alpha. |
| if (xfermode == SkXfermode::kSrcATop_Mode) { |
| // 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, fExistingClipRegion, |
| SkXfermode::kSrcOver_Mode, true); |
| } else { |
| SkAutoTUnref<SkPDFFormXObject> dstMaskStorage; |
| SkPDFFormXObject* dstMask = srcFormXObject.get(); |
| if (shape != nullptr) { |
| // Draw shape into a form-xobject. |
| SkDraw d; |
| d.fMatrix = &identity; |
| d.fClip = &clipRegion; |
| d.fClipStack = &clipStack; |
| SkPaint filledPaint; |
| filledPaint.setColor(SK_ColorBLACK); |
| filledPaint.setStyle(SkPaint::kFill_Style); |
| this->drawPath(d, *shape, filledPaint, nullptr, true); |
| |
| dstMaskStorage.reset(createFormXObjectFromDevice()); |
| dstMask = dstMaskStorage.get(); |
| } |
| drawFormXObjectWithMask(addXObjectResource(dst), dstMask, |
| &fExistingClipStack, fExistingClipRegion, |
| SkXfermode::kSrcOver_Mode, true); |
| } |
| |
| if (xfermode == SkXfermode::kClear_Mode) { |
| return; |
| } else if (xfermode == SkXfermode::kSrc_Mode || |
| xfermode == SkXfermode::kDstATop_Mode) { |
| ScopedContentEntry content(this, &fExistingClipStack, |
| fExistingClipRegion, identity, stockPaint); |
| if (content.entry()) { |
| SkPDFUtils::DrawFormXObject( |
| this->addXObjectResource(srcFormXObject.get()), |
| &content.entry()->fContent); |
| } |
| if (xfermode == SkXfermode::kSrc_Mode) { |
| return; |
| } |
| } else if (xfermode == SkXfermode::kSrcATop_Mode) { |
| ScopedContentEntry content(this, &fExistingClipStack, |
| fExistingClipRegion, identity, stockPaint); |
| if (content.entry()) { |
| SkPDFUtils::DrawFormXObject(this->addXObjectResource(dst), |
| &content.entry()->fContent); |
| } |
| } |
| |
| SkASSERT(xfermode == SkXfermode::kSrcIn_Mode || |
| xfermode == SkXfermode::kDstIn_Mode || |
| xfermode == SkXfermode::kSrcOut_Mode || |
| xfermode == SkXfermode::kDstOut_Mode || |
| xfermode == SkXfermode::kSrcATop_Mode || |
| xfermode == SkXfermode::kDstATop_Mode || |
| xfermode == SkXfermode::kModulate_Mode); |
| |
| if (xfermode == SkXfermode::kSrcIn_Mode || |
| xfermode == SkXfermode::kSrcOut_Mode || |
| xfermode == SkXfermode::kSrcATop_Mode) { |
| drawFormXObjectWithMask(addXObjectResource(srcFormXObject.get()), dst, |
| &fExistingClipStack, fExistingClipRegion, |
| SkXfermode::kSrcOver_Mode, |
| xfermode == SkXfermode::kSrcOut_Mode); |
| } else { |
| SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode; |
| if (xfermode == SkXfermode::kModulate_Mode) { |
| drawFormXObjectWithMask(addXObjectResource(srcFormXObject.get()), |
| dst, &fExistingClipStack, |
| fExistingClipRegion, |
| SkXfermode::kSrcOver_Mode, false); |
| mode = SkXfermode::kMultiply_Mode; |
| } |
| drawFormXObjectWithMask(addXObjectResource(dst), srcFormXObject.get(), |
| &fExistingClipStack, fExistingClipRegion, mode, |
| xfermode == SkXfermode::kDstOut_Mode); |
| } |
| } |
| |
| bool SkPDFDevice::isContentEmpty() { |
| ContentEntry* contentEntries = getContentEntries()->get(); |
| if (!contentEntries || contentEntries->fContent.getOffset() == 0) { |
| SkASSERT(!contentEntries || !contentEntries->fNext.get()); |
| return true; |
| } |
| return false; |
| } |
| |
| void SkPDFDevice::populateGraphicStateEntryFromPaint( |
| const SkMatrix& matrix, |
| const SkClipStack& clipStack, |
| const SkRegion& clipRegion, |
| const SkPaint& paint, |
| bool hasText, |
| 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->fClipRegion = clipRegion; |
| entry->fColor = SkColorSetA(paint.getColor(), 0xFF); |
| entry->fShaderIndex = -1; |
| |
| // PDF treats a shader as a color, so we only set one or the other. |
| SkAutoTUnref<SkPDFObject> pdfShader; |
| const SkShader* shader = paint.getShader(); |
| SkColor color = paint.getColor(); |
| if (shader) { |
| // 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. |
| SkIRect bounds = clipRegion.getBounds(); |
| |
| // We need to apply the initial transform to bounds in order to get |
| // bounds in a consistent coordinate system. |
| SkRect boundsTemp; |
| boundsTemp.set(bounds); |
| fInitialTransform.mapRect(&boundsTemp); |
| boundsTemp.roundOut(&bounds); |
| |
| SkScalar rasterScale = |
| SkIntToScalar(fRasterDpi) / DPI_FOR_RASTER_SCALE_ONE; |
| pdfShader.reset(SkPDFShader::GetPDFShader( |
| fCanon, fRasterDpi, *shader, transform, bounds, rasterScale)); |
| |
| 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; |
| } else { |
| // A color shader is treated as an invalid shader so we don't have |
| // to set a shader just for a color. |
| SkShader::GradientInfo gradientInfo; |
| SkColor gradientColor; |
| gradientInfo.fColors = &gradientColor; |
| gradientInfo.fColorOffsets = nullptr; |
| gradientInfo.fColorCount = 1; |
| if (shader->asAGradient(&gradientInfo) == |
| SkShader::kColor_GradientType) { |
| entry->fColor = SkColorSetA(gradientColor, 0xFF); |
| color = gradientColor; |
| } |
| } |
| } |
| |
| SkAutoTUnref<SkPDFGraphicState> newGraphicState; |
| if (color == paint.getColor()) { |
| newGraphicState.reset( |
| SkPDFGraphicState::GetGraphicStateForPaint(fCanon, paint)); |
| } else { |
| SkPaint newPaint = paint; |
| newPaint.setColor(color); |
| newGraphicState.reset( |
| SkPDFGraphicState::GetGraphicStateForPaint(fCanon, 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) { |
| // 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(xObject); |
| xObject->ref(); |
| } |
| return result; |
| } |
| |
| void SkPDFDevice::updateFont(const SkPaint& paint, uint16_t glyphID, |
| ContentEntry* contentEntry) { |
| SkTypeface* typeface = paint.getTypeface(); |
| if (contentEntry->fState.fFont == nullptr || |
| contentEntry->fState.fTextSize != paint.getTextSize() || |
| !contentEntry->fState.fFont->hasGlyph(glyphID)) { |
| int fontIndex = getFontResourceIndex(typeface, glyphID); |
| contentEntry->fContent.writeText("/"); |
| contentEntry->fContent.writeText(SkPDFResourceDict::getResourceName( |
| SkPDFResourceDict::kFont_ResourceType, |
| fontIndex).c_str()); |
| contentEntry->fContent.writeText(" "); |
| SkPDFUtils::AppendScalar(paint.getTextSize(), &contentEntry->fContent); |
| contentEntry->fContent.writeText(" Tf\n"); |
| contentEntry->fState.fFont = fFontResources[fontIndex]; |
| } |
| } |
| |
| int SkPDFDevice::getFontResourceIndex(SkTypeface* typeface, uint16_t glyphID) { |
| SkAutoTUnref<SkPDFFont> newFont( |
| SkPDFFont::GetFontResource(fCanon, typeface, glyphID)); |
| int resourceIndex = fFontResources.find(newFont.get()); |
| if (resourceIndex < 0) { |
| resourceIndex = fFontResources.count(); |
| fFontResources.push(newFont.get()); |
| newFont.get()->ref(); |
| } |
| return resourceIndex; |
| } |
| |
| static SkSize rect_to_size(const SkRect& r) { |
| return SkSize::Make(r.width(), r.height()); |
| } |
| |
| static const SkImage* color_filter(const SkImage* image, |
| SkColorFilter* colorFilter) { |
| SkAutoTUnref<SkSurface> surface(SkSurface::NewRaster( |
| SkImageInfo::MakeN32Premul(image->dimensions()))); |
| if (!surface) { |
| return image; |
| } |
| SkCanvas* canvas = surface->getCanvas(); |
| canvas->clear(SK_ColorTRANSPARENT); |
| SkPaint paint; |
| paint.setColorFilter(colorFilter); |
| canvas->drawImage(image, 0, 0, &paint); |
| canvas->flush(); |
| return surface->newImageSnapshot(); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| void SkPDFDevice::internalDrawImage(const SkMatrix& origMatrix, |
| const SkClipStack* clipStack, |
| const SkRegion& origClipRegion, |
| const SkImage* image, |
| const SkIRect* srcRect, |
| const SkPaint& paint) { |
| SkASSERT(image); |
| #ifdef SK_PDF_IMAGE_STATS |
| gDrawImageCalls.fetch_add(1); |
| #endif |
| SkMatrix matrix = origMatrix; |
| SkRegion perspectiveBounds; |
| const SkRegion* clipRegion = &origClipRegion; |
| SkAutoTUnref<const SkImage> autoImageUnref; |
| |
| if (srcRect) { |
| autoImageUnref.reset(image->newSubset(*srcRect)); |
| if (!autoImageUnref) { |
| return; |
| } |
| image = autoImageUnref; |
| } |
| // Rasterize the bitmap using perspective in a new bitmap. |
| if (origMatrix.hasPerspective()) { |
| if (fRasterDpi == 0) { |
| return; |
| } |
| // Transform the bitmap in the new space, without taking into |
| // account the initial transform. |
| SkPath perspectiveOutline; |
| SkRect imageBounds = SkRect::Make(image->bounds()); |
| perspectiveOutline.addRect(imageBounds); |
| perspectiveOutline.transform(origMatrix); |
| |
| // 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 = origMatrix; |
| total.postConcat(fInitialTransform); |
| SkScalar dpiScale = SkIntToScalar(fRasterDpi) / |
| SkIntToScalar(DPI_FOR_RASTER_SCALE_ONE); |
| 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(); |
| |
| SkAutoTUnref<SkSurface> surface( |
| SkSurface::NewRaster(SkImageInfo::MakeN32Premul(wh))); |
| if (!surface) { |
| return; |
| } |
| SkCanvas* canvas = surface->getCanvas(); |
| canvas->clear(SK_ColorTRANSPARENT); |
| |
| SkScalar deltaX = bounds.left(); |
| SkScalar deltaY = bounds.top(); |
| |
| SkMatrix offsetMatrix = origMatrix; |
| 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(image, 0, 0, nullptr); |
| // 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); |
| |
| perspectiveBounds.setRect(bounds.roundOut()); |
| clipRegion = &perspectiveBounds; |
| srcRect = nullptr; |
| |
| autoImageUnref.reset(surface->newImageSnapshot()); |
| image = autoImageUnref; |
| } |
| |
| 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 = image->bounds(); |
| scaled.postScale(SkIntToScalar(image->width()), |
| SkIntToScalar(image->height())); |
| scaled.postConcat(matrix); |
| ScopedContentEntry content(this, clipStack, *clipRegion, scaled, paint); |
| if (!content.entry() || (srcRect && !subset.intersect(*srcRect))) { |
| 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. |
| autoImageUnref.reset(color_filter(image, colorFilter)); |
| image = autoImageUnref; |
| // TODO(halcanary): de-dupe this by caching filtered images. |
| // (maybe in the resource cache?) |
| } |
| SkAutoTUnref<SkPDFObject> pdfimage(SkSafeRef(fCanon->findPDFBitmap(image))); |
| if (!pdfimage) { |
| pdfimage.reset(SkPDFCreateBitmapObject( |
| image, fCanon->fPixelSerializer)); |
| if (!pdfimage) { |
| return; |
| } |
| fCanon->addPDFBitmap(image->uniqueID(), pdfimage); |
| } |
| SkPDFUtils::DrawFormXObject(this->addXObjectResource(pdfimage.get()), |
| &content.entry()->fContent); |
| } |