| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkSVGDevice.h" |
| |
| #include "SkBase64.h" |
| #include "SkBitmap.h" |
| #include "SkChecksum.h" |
| #include "SkClipStack.h" |
| #include "SkData.h" |
| #include "SkDraw.h" |
| #include "SkImageEncoder.h" |
| #include "SkPaint.h" |
| #include "SkParsePath.h" |
| #include "SkShader.h" |
| #include "SkStream.h" |
| #include "SkTHash.h" |
| #include "SkTypeface.h" |
| #include "SkUtils.h" |
| #include "SkXMLWriter.h" |
| |
| namespace { |
| |
| static SkString svg_color(SkColor color) { |
| return SkStringPrintf("rgb(%u,%u,%u)", |
| SkColorGetR(color), |
| SkColorGetG(color), |
| SkColorGetB(color)); |
| } |
| |
| static SkScalar svg_opacity(SkColor color) { |
| return SkIntToScalar(SkColorGetA(color)) / SK_AlphaOPAQUE; |
| } |
| |
| // Keep in sync with SkPaint::Cap |
| static const char* cap_map[] = { |
| nullptr, // kButt_Cap (default) |
| "round", // kRound_Cap |
| "square" // kSquare_Cap |
| }; |
| static_assert(SK_ARRAY_COUNT(cap_map) == SkPaint::kCapCount, "missing_cap_map_entry"); |
| |
| static const char* svg_cap(SkPaint::Cap cap) { |
| SkASSERT(cap < SK_ARRAY_COUNT(cap_map)); |
| return cap_map[cap]; |
| } |
| |
| // Keep in sync with SkPaint::Join |
| static const char* join_map[] = { |
| nullptr, // kMiter_Join (default) |
| "round", // kRound_Join |
| "bevel" // kBevel_Join |
| }; |
| static_assert(SK_ARRAY_COUNT(join_map) == SkPaint::kJoinCount, "missing_join_map_entry"); |
| |
| static const char* svg_join(SkPaint::Join join) { |
| SkASSERT(join < SK_ARRAY_COUNT(join_map)); |
| return join_map[join]; |
| } |
| |
| // Keep in sync with SkPaint::Align |
| static const char* text_align_map[] = { |
| nullptr, // kLeft_Align (default) |
| "middle", // kCenter_Align |
| "end" // kRight_Align |
| }; |
| static_assert(SK_ARRAY_COUNT(text_align_map) == SkPaint::kAlignCount, |
| "missing_text_align_map_entry"); |
| static const char* svg_text_align(SkPaint::Align align) { |
| SkASSERT(align < SK_ARRAY_COUNT(text_align_map)); |
| return text_align_map[align]; |
| } |
| |
| static SkString svg_transform(const SkMatrix& t) { |
| SkASSERT(!t.isIdentity()); |
| |
| SkString tstr; |
| switch (t.getType()) { |
| case SkMatrix::kPerspective_Mask: |
| SkDebugf("Can't handle perspective matrices."); |
| break; |
| case SkMatrix::kTranslate_Mask: |
| tstr.printf("translate(%g %g)", t.getTranslateX(), t.getTranslateY()); |
| break; |
| case SkMatrix::kScale_Mask: |
| tstr.printf("scale(%g %g)", t.getScaleX(), t.getScaleY()); |
| break; |
| default: |
| // http://www.w3.org/TR/SVG/coords.html#TransformMatrixDefined |
| // | a c e | |
| // | b d f | |
| // | 0 0 1 | |
| tstr.printf("matrix(%g %g %g %g %g %g)", |
| t.getScaleX(), t.getSkewY(), |
| t.getSkewX(), t.getScaleY(), |
| t.getTranslateX(), t.getTranslateY()); |
| break; |
| } |
| |
| return tstr; |
| } |
| |
| struct Resources { |
| Resources(const SkPaint& paint) |
| : fPaintServer(svg_color(paint.getColor())) {} |
| |
| SkString fPaintServer; |
| SkString fClip; |
| }; |
| |
| class SVGTextBuilder : SkNoncopyable { |
| public: |
| SVGTextBuilder(const void* text, size_t byteLen, const SkPaint& paint, const SkPoint& offset, |
| unsigned scalarsPerPos, const SkScalar pos[] = nullptr) |
| : fOffset(offset) |
| , fScalarsPerPos(scalarsPerPos) |
| , fPos(pos) |
| , fLastCharWasWhitespace(true) // start off in whitespace mode to strip all leading space |
| { |
| SkASSERT(scalarsPerPos <= 2); |
| SkASSERT(scalarsPerPos == 0 || SkToBool(pos)); |
| |
| int count = paint.countText(text, byteLen); |
| |
| switch(paint.getTextEncoding()) { |
| case SkPaint::kGlyphID_TextEncoding: { |
| SkASSERT(count * sizeof(uint16_t) == byteLen); |
| SkAutoSTArray<64, SkUnichar> unichars(count); |
| paint.glyphsToUnichars((const uint16_t*)text, count, unichars.get()); |
| for (int i = 0; i < count; ++i) { |
| this->appendUnichar(unichars[i]); |
| } |
| } break; |
| case SkPaint::kUTF8_TextEncoding: { |
| const char* c8 = reinterpret_cast<const char*>(text); |
| for (int i = 0; i < count; ++i) { |
| this->appendUnichar(SkUTF8_NextUnichar(&c8)); |
| } |
| SkASSERT(reinterpret_cast<const char*>(text) + byteLen == c8); |
| } break; |
| case SkPaint::kUTF16_TextEncoding: { |
| const uint16_t* c16 = reinterpret_cast<const uint16_t*>(text); |
| for (int i = 0; i < count; ++i) { |
| this->appendUnichar(SkUTF16_NextUnichar(&c16)); |
| } |
| SkASSERT(SkIsAlign2(byteLen)); |
| SkASSERT(reinterpret_cast<const uint16_t*>(text) + (byteLen / 2) == c16); |
| } break; |
| case SkPaint::kUTF32_TextEncoding: { |
| SkASSERT(count * sizeof(uint32_t) == byteLen); |
| const uint32_t* c32 = reinterpret_cast<const uint32_t*>(text); |
| for (int i = 0; i < count; ++i) { |
| this->appendUnichar(c32[i]); |
| } |
| } break; |
| default: |
| SkFAIL("unknown text encoding"); |
| } |
| |
| if (scalarsPerPos < 2) { |
| SkASSERT(fPosY.isEmpty()); |
| fPosY.appendScalar(offset.y()); // DrawText or DrawPosTextH (fixed Y). |
| } |
| |
| if (scalarsPerPos < 1) { |
| SkASSERT(fPosX.isEmpty()); |
| fPosX.appendScalar(offset.x()); // DrawText (X also fixed). |
| } |
| } |
| |
| const SkString& text() const { return fText; } |
| const SkString& posX() const { return fPosX; } |
| const SkString& posY() const { return fPosY; } |
| |
| private: |
| void appendUnichar(SkUnichar c) { |
| bool discardPos = false; |
| bool isWhitespace = false; |
| |
| switch(c) { |
| case ' ': |
| case '\t': |
| // consolidate whitespace to match SVG's xml:space=default munging |
| // (http://www.w3.org/TR/SVG/text.html#WhiteSpace) |
| if (fLastCharWasWhitespace) { |
| discardPos = true; |
| } else { |
| fText.appendUnichar(c); |
| } |
| isWhitespace = true; |
| break; |
| case '\0': |
| // SkPaint::glyphsToUnichars() returns \0 for inconvertible glyphs, but these |
| // are not legal XML characters (http://www.w3.org/TR/REC-xml/#charsets) |
| discardPos = true; |
| isWhitespace = fLastCharWasWhitespace; // preserve whitespace consolidation |
| break; |
| case '&': |
| fText.append("&"); |
| break; |
| case '"': |
| fText.append("""); |
| break; |
| case '\'': |
| fText.append("'"); |
| break; |
| case '<': |
| fText.append("<"); |
| break; |
| case '>': |
| fText.append(">"); |
| break; |
| default: |
| fText.appendUnichar(c); |
| break; |
| } |
| |
| this->advancePos(discardPos); |
| fLastCharWasWhitespace = isWhitespace; |
| } |
| |
| void advancePos(bool discard) { |
| if (!discard && fScalarsPerPos > 0) { |
| fPosX.appendf("%.8g, ", fOffset.x() + fPos[0]); |
| if (fScalarsPerPos > 1) { |
| SkASSERT(fScalarsPerPos == 2); |
| fPosY.appendf("%.8g, ", fOffset.y() + fPos[1]); |
| } |
| } |
| fPos += fScalarsPerPos; |
| } |
| |
| const SkPoint& fOffset; |
| const unsigned fScalarsPerPos; |
| const SkScalar* fPos; |
| |
| SkString fText, fPosX, fPosY; |
| bool fLastCharWasWhitespace; |
| }; |
| |
| } |
| |
| // For now all this does is serve unique serial IDs, but it will eventually evolve to track |
| // and deduplicate resources. |
| class SkSVGDevice::ResourceBucket : ::SkNoncopyable { |
| public: |
| ResourceBucket() : fGradientCount(0), fClipCount(0), fPathCount(0), fImageCount(0) {} |
| |
| SkString addLinearGradient() { |
| return SkStringPrintf("gradient_%d", fGradientCount++); |
| } |
| |
| SkString addClip() { |
| return SkStringPrintf("clip_%d", fClipCount++); |
| } |
| |
| SkString addPath() { |
| return SkStringPrintf("path_%d", fPathCount++); |
| } |
| |
| SkString addImage() { |
| return SkStringPrintf("img_%d", fImageCount++); |
| } |
| |
| private: |
| uint32_t fGradientCount; |
| uint32_t fClipCount; |
| uint32_t fPathCount; |
| uint32_t fImageCount; |
| }; |
| |
| class SkSVGDevice::AutoElement : ::SkNoncopyable { |
| public: |
| AutoElement(const char name[], SkXMLWriter* writer) |
| : fWriter(writer) |
| , fResourceBucket(nullptr) { |
| fWriter->startElement(name); |
| } |
| |
| AutoElement(const char name[], SkXMLWriter* writer, ResourceBucket* bucket, |
| const SkDraw& draw, const SkPaint& paint) |
| : fWriter(writer) |
| , fResourceBucket(bucket) { |
| |
| Resources res = this->addResources(draw, paint); |
| if (!res.fClip.isEmpty()) { |
| // The clip is in device space. Apply it via a <g> wrapper to avoid local transform |
| // interference. |
| fClipGroup.reset(new AutoElement("g", fWriter)); |
| fClipGroup->addAttribute("clip-path",res.fClip); |
| } |
| |
| fWriter->startElement(name); |
| |
| this->addPaint(paint, res); |
| |
| if (!draw.fMatrix->isIdentity()) { |
| this->addAttribute("transform", svg_transform(*draw.fMatrix)); |
| } |
| } |
| |
| ~AutoElement() { |
| fWriter->endElement(); |
| } |
| |
| void addAttribute(const char name[], const char val[]) { |
| fWriter->addAttribute(name, val); |
| } |
| |
| void addAttribute(const char name[], const SkString& val) { |
| fWriter->addAttribute(name, val.c_str()); |
| } |
| |
| void addAttribute(const char name[], int32_t val) { |
| fWriter->addS32Attribute(name, val); |
| } |
| |
| void addAttribute(const char name[], SkScalar val) { |
| fWriter->addScalarAttribute(name, val); |
| } |
| |
| void addText(const SkString& text) { |
| fWriter->addText(text.c_str(), text.size()); |
| } |
| |
| void addRectAttributes(const SkRect&); |
| void addPathAttributes(const SkPath&); |
| void addTextAttributes(const SkPaint&); |
| |
| private: |
| Resources addResources(const SkDraw& draw, const SkPaint& paint); |
| void addClipResources(const SkDraw& draw, Resources* resources); |
| void addShaderResources(const SkPaint& paint, Resources* resources); |
| |
| void addPaint(const SkPaint& paint, const Resources& resources); |
| |
| SkString addLinearGradientDef(const SkShader::GradientInfo& info, const SkShader* shader); |
| |
| SkXMLWriter* fWriter; |
| ResourceBucket* fResourceBucket; |
| std::unique_ptr<AutoElement> fClipGroup; |
| }; |
| |
| void SkSVGDevice::AutoElement::addPaint(const SkPaint& paint, const Resources& resources) { |
| SkPaint::Style style = paint.getStyle(); |
| if (style == SkPaint::kFill_Style || style == SkPaint::kStrokeAndFill_Style) { |
| this->addAttribute("fill", resources.fPaintServer); |
| |
| if (SK_AlphaOPAQUE != SkColorGetA(paint.getColor())) { |
| this->addAttribute("fill-opacity", svg_opacity(paint.getColor())); |
| } |
| } else { |
| SkASSERT(style == SkPaint::kStroke_Style); |
| this->addAttribute("fill", "none"); |
| } |
| |
| if (style == SkPaint::kStroke_Style || style == SkPaint::kStrokeAndFill_Style) { |
| this->addAttribute("stroke", resources.fPaintServer); |
| |
| SkScalar strokeWidth = paint.getStrokeWidth(); |
| if (strokeWidth == 0) { |
| // Hairline stroke |
| strokeWidth = 1; |
| this->addAttribute("vector-effect", "non-scaling-stroke"); |
| } |
| this->addAttribute("stroke-width", strokeWidth); |
| |
| if (const char* cap = svg_cap(paint.getStrokeCap())) { |
| this->addAttribute("stroke-linecap", cap); |
| } |
| |
| if (const char* join = svg_join(paint.getStrokeJoin())) { |
| this->addAttribute("stroke-linejoin", join); |
| } |
| |
| if (paint.getStrokeJoin() == SkPaint::kMiter_Join) { |
| this->addAttribute("stroke-miterlimit", paint.getStrokeMiter()); |
| } |
| |
| if (SK_AlphaOPAQUE != SkColorGetA(paint.getColor())) { |
| this->addAttribute("stroke-opacity", svg_opacity(paint.getColor())); |
| } |
| } else { |
| SkASSERT(style == SkPaint::kFill_Style); |
| this->addAttribute("stroke", "none"); |
| } |
| } |
| |
| Resources SkSVGDevice::AutoElement::addResources(const SkDraw& draw, const SkPaint& paint) { |
| Resources resources(paint); |
| |
| // FIXME: this is a weak heuristic and we end up with LOTS of redundant clips. |
| bool hasClip = !draw.fClipStack->isWideOpen(); |
| bool hasShader = SkToBool(paint.getShader()); |
| |
| if (hasClip || hasShader) { |
| AutoElement defs("defs", fWriter); |
| |
| if (hasClip) { |
| this->addClipResources(draw, &resources); |
| } |
| |
| if (hasShader) { |
| this->addShaderResources(paint, &resources); |
| } |
| } |
| |
| return resources; |
| } |
| |
| void SkSVGDevice::AutoElement::addShaderResources(const SkPaint& paint, Resources* resources) { |
| const SkShader* shader = paint.getShader(); |
| SkASSERT(SkToBool(shader)); |
| |
| SkShader::GradientInfo grInfo; |
| grInfo.fColorCount = 0; |
| if (SkShader::kLinear_GradientType != shader->asAGradient(&grInfo)) { |
| // TODO: non-linear gradient support |
| SkDebugf("unsupported shader type\n"); |
| return; |
| } |
| |
| SkAutoSTArray<16, SkColor> grColors(grInfo.fColorCount); |
| SkAutoSTArray<16, SkScalar> grOffsets(grInfo.fColorCount); |
| grInfo.fColors = grColors.get(); |
| grInfo.fColorOffsets = grOffsets.get(); |
| |
| // One more call to get the actual colors/offsets. |
| shader->asAGradient(&grInfo); |
| SkASSERT(grInfo.fColorCount <= grColors.count()); |
| SkASSERT(grInfo.fColorCount <= grOffsets.count()); |
| |
| resources->fPaintServer.printf("url(#%s)", addLinearGradientDef(grInfo, shader).c_str()); |
| } |
| |
| void SkSVGDevice::AutoElement::addClipResources(const SkDraw& draw, Resources* resources) { |
| SkASSERT(!draw.fClipStack->isWideOpen()); |
| |
| SkPath clipPath; |
| (void) draw.fClipStack->asPath(&clipPath); |
| |
| SkString clipID = fResourceBucket->addClip(); |
| const char* clipRule = clipPath.getFillType() == SkPath::kEvenOdd_FillType ? |
| "evenodd" : "nonzero"; |
| { |
| // clipPath is in device space, but since we're only pushing transform attributes |
| // to the leaf nodes, so are all our elements => SVG userSpaceOnUse == device space. |
| AutoElement clipPathElement("clipPath", fWriter); |
| clipPathElement.addAttribute("id", clipID); |
| |
| SkRect clipRect = SkRect::MakeEmpty(); |
| if (clipPath.isEmpty() || clipPath.isRect(&clipRect)) { |
| AutoElement rectElement("rect", fWriter); |
| rectElement.addRectAttributes(clipRect); |
| rectElement.addAttribute("clip-rule", clipRule); |
| } else { |
| AutoElement pathElement("path", fWriter); |
| pathElement.addPathAttributes(clipPath); |
| pathElement.addAttribute("clip-rule", clipRule); |
| } |
| } |
| |
| resources->fClip.printf("url(#%s)", clipID.c_str()); |
| } |
| |
| SkString SkSVGDevice::AutoElement::addLinearGradientDef(const SkShader::GradientInfo& info, |
| const SkShader* shader) { |
| SkASSERT(fResourceBucket); |
| SkString id = fResourceBucket->addLinearGradient(); |
| |
| { |
| AutoElement gradient("linearGradient", fWriter); |
| |
| gradient.addAttribute("id", id); |
| gradient.addAttribute("gradientUnits", "userSpaceOnUse"); |
| gradient.addAttribute("x1", info.fPoint[0].x()); |
| gradient.addAttribute("y1", info.fPoint[0].y()); |
| gradient.addAttribute("x2", info.fPoint[1].x()); |
| gradient.addAttribute("y2", info.fPoint[1].y()); |
| |
| if (!shader->getLocalMatrix().isIdentity()) { |
| this->addAttribute("gradientTransform", svg_transform(shader->getLocalMatrix())); |
| } |
| |
| SkASSERT(info.fColorCount >= 2); |
| for (int i = 0; i < info.fColorCount; ++i) { |
| SkColor color = info.fColors[i]; |
| SkString colorStr(svg_color(color)); |
| |
| { |
| AutoElement stop("stop", fWriter); |
| stop.addAttribute("offset", info.fColorOffsets[i]); |
| stop.addAttribute("stop-color", colorStr.c_str()); |
| |
| if (SK_AlphaOPAQUE != SkColorGetA(color)) { |
| stop.addAttribute("stop-opacity", svg_opacity(color)); |
| } |
| } |
| } |
| } |
| |
| return id; |
| } |
| |
| void SkSVGDevice::AutoElement::addRectAttributes(const SkRect& rect) { |
| // x, y default to 0 |
| if (rect.x() != 0) { |
| this->addAttribute("x", rect.x()); |
| } |
| if (rect.y() != 0) { |
| this->addAttribute("y", rect.y()); |
| } |
| |
| this->addAttribute("width", rect.width()); |
| this->addAttribute("height", rect.height()); |
| } |
| |
| void SkSVGDevice::AutoElement::addPathAttributes(const SkPath& path) { |
| SkString pathData; |
| SkParsePath::ToSVGString(path, &pathData); |
| this->addAttribute("d", pathData); |
| } |
| |
| void SkSVGDevice::AutoElement::addTextAttributes(const SkPaint& paint) { |
| this->addAttribute("font-size", paint.getTextSize()); |
| |
| if (const char* textAlign = svg_text_align(paint.getTextAlign())) { |
| this->addAttribute("text-anchor", textAlign); |
| } |
| |
| SkString familyName; |
| SkTHashSet<SkString> familySet; |
| sk_sp<const SkTypeface> tface(paint.getTypeface() ? |
| sk_ref_sp(paint.getTypeface()) : SkTypeface::MakeDefault()); |
| |
| SkASSERT(tface); |
| SkTypeface::Style style = tface->style(); |
| if (style & SkTypeface::kItalic) { |
| this->addAttribute("font-style", "italic"); |
| } |
| if (style & SkTypeface::kBold) { |
| this->addAttribute("font-weight", "bold"); |
| } |
| |
| SkAutoTUnref<SkTypeface::LocalizedStrings> familyNameIter(tface->createFamilyNameIterator()); |
| SkTypeface::LocalizedString familyString; |
| while (familyNameIter->next(&familyString)) { |
| if (familySet.contains(familyString.fString)) { |
| continue; |
| } |
| familySet.add(familyString.fString); |
| familyName.appendf((familyName.isEmpty() ? "%s" : ", %s"), familyString.fString.c_str()); |
| } |
| |
| if (!familyName.isEmpty()) { |
| this->addAttribute("font-family", familyName); |
| } |
| } |
| |
| SkBaseDevice* SkSVGDevice::Create(const SkISize& size, SkXMLWriter* writer) { |
| if (!writer) { |
| return nullptr; |
| } |
| |
| return new SkSVGDevice(size, writer); |
| } |
| |
| SkSVGDevice::SkSVGDevice(const SkISize& size, SkXMLWriter* writer) |
| : INHERITED(SkImageInfo::MakeUnknown(size.fWidth, size.fHeight), |
| SkSurfaceProps(0, kUnknown_SkPixelGeometry)) |
| , fWriter(writer) |
| , fResourceBucket(new ResourceBucket) |
| { |
| SkASSERT(writer); |
| |
| fWriter->writeHeader(); |
| |
| // The root <svg> tag gets closed by the destructor. |
| fRootElement.reset(new AutoElement("svg", fWriter)); |
| |
| fRootElement->addAttribute("xmlns", "http://www.w3.org/2000/svg"); |
| fRootElement->addAttribute("xmlns:xlink", "http://www.w3.org/1999/xlink"); |
| fRootElement->addAttribute("width", size.width()); |
| fRootElement->addAttribute("height", size.height()); |
| } |
| |
| SkSVGDevice::~SkSVGDevice() { |
| } |
| |
| void SkSVGDevice::drawPaint(const SkDraw& draw, const SkPaint& paint) { |
| AutoElement rect("rect", fWriter, fResourceBucket.get(), draw, paint); |
| rect.addRectAttributes(SkRect::MakeWH(SkIntToScalar(this->width()), |
| SkIntToScalar(this->height()))); |
| } |
| |
| void SkSVGDevice::drawPoints(const SkDraw& draw, SkCanvas::PointMode mode, size_t count, |
| const SkPoint pts[], const SkPaint& paint) { |
| SkPath path; |
| |
| switch (mode) { |
| // todo |
| case SkCanvas::kPoints_PointMode: |
| SkDebugf("unsupported operation: drawPoints(kPoints_PointMode)\n"); |
| break; |
| case SkCanvas::kLines_PointMode: |
| count -= 1; |
| for (size_t i = 0; i < count; i += 2) { |
| path.rewind(); |
| path.moveTo(pts[i]); |
| path.lineTo(pts[i+1]); |
| AutoElement elem("path", fWriter, fResourceBucket.get(), draw, paint); |
| elem.addPathAttributes(path); |
| } |
| break; |
| case SkCanvas::kPolygon_PointMode: |
| if (count > 1) { |
| path.addPoly(pts, SkToInt(count), false); |
| path.moveTo(pts[0]); |
| AutoElement elem("path", fWriter, fResourceBucket.get(), draw, paint); |
| elem.addPathAttributes(path); |
| } |
| break; |
| } |
| } |
| |
| void SkSVGDevice::drawRect(const SkDraw& draw, const SkRect& r, const SkPaint& paint) { |
| AutoElement rect("rect", fWriter, fResourceBucket.get(), draw, paint); |
| rect.addRectAttributes(r); |
| } |
| |
| void SkSVGDevice::drawOval(const SkDraw& draw, const SkRect& oval, const SkPaint& paint) { |
| AutoElement ellipse("ellipse", fWriter, fResourceBucket.get(), draw, paint); |
| ellipse.addAttribute("cx", oval.centerX()); |
| ellipse.addAttribute("cy", oval.centerY()); |
| ellipse.addAttribute("rx", oval.width() / 2); |
| ellipse.addAttribute("ry", oval.height() / 2); |
| } |
| |
| void SkSVGDevice::drawRRect(const SkDraw& draw, const SkRRect& rr, const SkPaint& paint) { |
| SkPath path; |
| path.addRRect(rr); |
| |
| AutoElement elem("path", fWriter, fResourceBucket.get(), draw, paint); |
| elem.addPathAttributes(path); |
| } |
| |
| void SkSVGDevice::drawPath(const SkDraw& draw, const SkPath& path, const SkPaint& paint, |
| const SkMatrix* prePathMatrix, bool pathIsMutable) { |
| AutoElement elem("path", fWriter, fResourceBucket.get(), draw, paint); |
| elem.addPathAttributes(path); |
| |
| // TODO: inverse fill types? |
| if (path.getFillType() == SkPath::kEvenOdd_FillType) { |
| elem.addAttribute("fill-rule", "evenodd"); |
| } |
| } |
| |
| void SkSVGDevice::drawBitmapCommon(const SkDraw& draw, const SkBitmap& bm, |
| const SkPaint& paint) { |
| SkAutoTUnref<const SkData> pngData( |
| SkImageEncoder::EncodeData(bm, SkImageEncoder::kPNG_Type, SkImageEncoder::kDefaultQuality)); |
| if (!pngData) { |
| return; |
| } |
| |
| size_t b64Size = SkBase64::Encode(pngData->data(), pngData->size(), nullptr); |
| SkAutoTMalloc<char> b64Data(b64Size); |
| SkBase64::Encode(pngData->data(), pngData->size(), b64Data.get()); |
| |
| SkString svgImageData("data:image/png;base64,"); |
| svgImageData.append(b64Data.get(), b64Size); |
| |
| SkString imageID = fResourceBucket->addImage(); |
| { |
| AutoElement defs("defs", fWriter); |
| { |
| AutoElement image("image", fWriter); |
| image.addAttribute("id", imageID); |
| image.addAttribute("width", bm.width()); |
| image.addAttribute("height", bm.height()); |
| image.addAttribute("xlink:href", svgImageData); |
| } |
| } |
| |
| { |
| AutoElement imageUse("use", fWriter, fResourceBucket.get(), draw, paint); |
| imageUse.addAttribute("xlink:href", SkStringPrintf("#%s", imageID.c_str())); |
| } |
| } |
| |
| void SkSVGDevice::drawBitmap(const SkDraw& draw, const SkBitmap& bitmap, |
| const SkMatrix& matrix, const SkPaint& paint) { |
| SkMatrix adjustedMatrix = *draw.fMatrix; |
| adjustedMatrix.preConcat(matrix); |
| SkDraw adjustedDraw(draw); |
| adjustedDraw.fMatrix = &adjustedMatrix; |
| |
| drawBitmapCommon(adjustedDraw, bitmap, paint); |
| } |
| |
| void SkSVGDevice::drawSprite(const SkDraw& draw, const SkBitmap& bitmap, |
| int x, int y, const SkPaint& paint) { |
| SkMatrix adjustedMatrix = *draw.fMatrix; |
| adjustedMatrix.preTranslate(SkIntToScalar(x), SkIntToScalar(y)); |
| SkDraw adjustedDraw(draw); |
| adjustedDraw.fMatrix = &adjustedMatrix; |
| |
| drawBitmapCommon(adjustedDraw, bitmap, paint); |
| } |
| |
| void SkSVGDevice::drawBitmapRect(const SkDraw& draw, const SkBitmap& bm, const SkRect* srcOrNull, |
| const SkRect& dst, const SkPaint& paint, |
| SkCanvas::SrcRectConstraint) { |
| SkMatrix adjustedMatrix; |
| adjustedMatrix.setRectToRect(srcOrNull ? *srcOrNull : SkRect::Make(bm.bounds()), |
| dst, |
| SkMatrix::kFill_ScaleToFit); |
| adjustedMatrix.postConcat(*draw.fMatrix); |
| |
| SkDraw adjustedDraw(draw); |
| adjustedDraw.fMatrix = &adjustedMatrix; |
| |
| SkClipStack adjustedClipStack; |
| if (srcOrNull && *srcOrNull != SkRect::Make(bm.bounds())) { |
| adjustedClipStack = *draw.fClipStack; |
| adjustedClipStack.clipRect(dst, *draw.fMatrix, SkCanvas::kIntersect_Op, |
| paint.isAntiAlias()); |
| adjustedDraw.fClipStack = &adjustedClipStack; |
| } |
| |
| drawBitmapCommon(adjustedDraw, bm, paint); |
| } |
| |
| void SkSVGDevice::drawText(const SkDraw& draw, const void* text, size_t len, |
| SkScalar x, SkScalar y, const SkPaint& paint) { |
| AutoElement elem("text", fWriter, fResourceBucket.get(), draw, paint); |
| elem.addTextAttributes(paint); |
| |
| SVGTextBuilder builder(text, len, paint, SkPoint::Make(x, y), 0); |
| elem.addAttribute("x", builder.posX()); |
| elem.addAttribute("y", builder.posY()); |
| elem.addText(builder.text()); |
| } |
| |
| void SkSVGDevice::drawPosText(const SkDraw& draw, const void* text, size_t len, |
| const SkScalar pos[], int scalarsPerPos, const SkPoint& offset, |
| const SkPaint& paint) { |
| SkASSERT(scalarsPerPos == 1 || scalarsPerPos == 2); |
| |
| AutoElement elem("text", fWriter, fResourceBucket.get(), draw, paint); |
| elem.addTextAttributes(paint); |
| |
| SVGTextBuilder builder(text, len, paint, offset, scalarsPerPos, pos); |
| elem.addAttribute("x", builder.posX()); |
| elem.addAttribute("y", builder.posY()); |
| elem.addText(builder.text()); |
| } |
| |
| void SkSVGDevice::drawTextOnPath(const SkDraw&, const void* text, size_t len, const SkPath& path, |
| const SkMatrix* matrix, const SkPaint& paint) { |
| SkString pathID = fResourceBucket->addPath(); |
| |
| { |
| AutoElement defs("defs", fWriter); |
| AutoElement pathElement("path", fWriter); |
| pathElement.addAttribute("id", pathID); |
| pathElement.addPathAttributes(path); |
| |
| } |
| |
| { |
| AutoElement textElement("text", fWriter); |
| textElement.addTextAttributes(paint); |
| |
| if (matrix && !matrix->isIdentity()) { |
| textElement.addAttribute("transform", svg_transform(*matrix)); |
| } |
| |
| { |
| AutoElement textPathElement("textPath", fWriter); |
| textPathElement.addAttribute("xlink:href", SkStringPrintf("#%s", pathID.c_str())); |
| |
| if (paint.getTextAlign() != SkPaint::kLeft_Align) { |
| SkASSERT(paint.getTextAlign() == SkPaint::kCenter_Align || |
| paint.getTextAlign() == SkPaint::kRight_Align); |
| textPathElement.addAttribute("startOffset", |
| paint.getTextAlign() == SkPaint::kCenter_Align ? "50%" : "100%"); |
| } |
| |
| SVGTextBuilder builder(text, len, paint, SkPoint::Make(0, 0), 0); |
| textPathElement.addText(builder.text()); |
| } |
| } |
| } |
| |
| void SkSVGDevice::drawVertices(const SkDraw&, SkCanvas::VertexMode, int vertexCount, |
| const SkPoint verts[], const SkPoint texs[], |
| const SkColor colors[], SK_XFERMODE_PARAM xmode, |
| const uint16_t indices[], int indexCount, |
| const SkPaint& paint) { |
| // todo |
| SkDebugf("unsupported operation: drawVertices()\n"); |
| } |
| |
| void SkSVGDevice::drawDevice(const SkDraw&, SkBaseDevice*, int x, int y, |
| const SkPaint&) { |
| // todo |
| SkDebugf("unsupported operation: drawDevice()\n"); |
| } |