| /* |
| * 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 "SkAnnotationKeys.h" |
| #include "SkBase64.h" |
| #include "SkBitmap.h" |
| #include "SkBlendMode.h" |
| #include "SkChecksum.h" |
| #include "SkClipOpPriv.h" |
| #include "SkClipStack.h" |
| #include "SkColorFilter.h" |
| #include "SkData.h" |
| #include "SkDraw.h" |
| #include "SkImage.h" |
| #include "SkImageEncoder.h" |
| #include "SkJpegCodec.h" |
| #include "SkPaint.h" |
| #include "SkParsePath.h" |
| #include "SkPngCodec.h" |
| #include "SkShader.h" |
| #include "SkStream.h" |
| #include "SkTHash.h" |
| #include "SkTo.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]; |
| } |
| |
| static SkString svg_transform(const SkMatrix& t) { |
| SkASSERT(!t.isIdentity()); |
| |
| SkString tstr; |
| switch (t.getType()) { |
| case SkMatrix::kPerspective_Mask: |
| // TODO: 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; |
| SkString fColorFilter; |
| }; |
| |
| // Determine if the paint requires us to reset the viewport. |
| // Currently, we do this whenever the paint shader calls |
| // for a repeating image. |
| bool RequiresViewportReset(const SkPaint& paint) { |
| SkShader* shader = paint.getShader(); |
| if (!shader) |
| return false; |
| |
| SkShader::TileMode xy[2]; |
| SkImage* image = shader->isAImage(nullptr, xy); |
| |
| if (!image) |
| return false; |
| |
| for (int i = 0; i < 2; i++) { |
| if (xy[i] == SkShader::kRepeat_TileMode) |
| return true; |
| } |
| return false; |
| } |
| |
| } // namespace |
| |
| // 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) |
| , fPatternCount(0) |
| , fColorFilterCount(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++); |
| } |
| |
| SkString addColorFilter() { return SkStringPrintf("cfilter_%d", fColorFilterCount++); } |
| |
| SkString addPattern() { |
| return SkStringPrintf("pattern_%d", fPatternCount++); |
| } |
| |
| private: |
| uint32_t fGradientCount; |
| uint32_t fClipCount; |
| uint32_t fPathCount; |
| uint32_t fImageCount; |
| uint32_t fPatternCount; |
| uint32_t fColorFilterCount; |
| }; |
| |
| struct SkSVGDevice::MxCp { |
| const SkMatrix* fMatrix; |
| const SkClipStack* fClipStack; |
| |
| MxCp(const SkMatrix* mx, const SkClipStack* cs) : fMatrix(mx), fClipStack(cs) {} |
| MxCp(SkSVGDevice* device) : fMatrix(&device->ctm()), fClipStack(&device->cs()) {} |
| }; |
| |
| 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 MxCp& mc, const SkPaint& paint) |
| : fWriter(writer) |
| , fResourceBucket(bucket) { |
| |
| Resources res = this->addResources(mc, 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 (!mc.fMatrix->isIdentity()) { |
| this->addAttribute("transform", svg_transform(*mc.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 SkFont&); |
| |
| private: |
| Resources addResources(const MxCp&, const SkPaint& paint); |
| void addClipResources(const MxCp&, Resources* resources); |
| void addShaderResources(const SkPaint& paint, Resources* resources); |
| void addGradientShaderResources(const SkShader* shader, const SkPaint& paint, |
| Resources* resources); |
| void addColorFilterResources(const SkColorFilter& cf, Resources* resources); |
| void addImageShaderResources(const SkShader* shader, const SkPaint& paint, |
| Resources* resources); |
| |
| void addPatternDef(const SkBitmap& bm); |
| |
| 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 (!resources.fColorFilter.isEmpty()) { |
| this->addAttribute("filter", resources.fColorFilter.c_str()); |
| } |
| |
| 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 MxCp& mc, const SkPaint& paint) { |
| Resources resources(paint); |
| |
| // FIXME: this is a weak heuristic and we end up with LOTS of redundant clips. |
| bool hasClip = !mc.fClipStack->isWideOpen(); |
| bool hasShader = SkToBool(paint.getShader()); |
| |
| if (hasClip || hasShader) { |
| AutoElement defs("defs", fWriter); |
| |
| if (hasClip) { |
| this->addClipResources(mc, &resources); |
| } |
| |
| if (hasShader) { |
| this->addShaderResources(paint, &resources); |
| } |
| } |
| |
| if (const SkColorFilter* cf = paint.getColorFilter()) { |
| // TODO: Implement skia color filters for blend modes other than SrcIn |
| SkBlendMode mode; |
| if (cf->asColorMode(nullptr, &mode) && mode == SkBlendMode::kSrcIn) { |
| this->addColorFilterResources(*cf, &resources); |
| } |
| } |
| return resources; |
| } |
| |
| void SkSVGDevice::AutoElement::addGradientShaderResources(const SkShader* shader, |
| const SkPaint& paint, |
| Resources* resources) { |
| SkShader::GradientInfo grInfo; |
| grInfo.fColorCount = 0; |
| if (SkShader::kLinear_GradientType != shader->asAGradient(&grInfo)) { |
| // TODO: non-linear gradient support |
| 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::addColorFilterResources(const SkColorFilter& cf, |
| Resources* resources) { |
| SkString colorfilterID = fResourceBucket->addColorFilter(); |
| { |
| AutoElement filterElement("filter", fWriter); |
| filterElement.addAttribute("id", colorfilterID); |
| filterElement.addAttribute("x", "0%"); |
| filterElement.addAttribute("y", "0%"); |
| filterElement.addAttribute("width", "100%"); |
| filterElement.addAttribute("height", "100%"); |
| |
| SkColor filterColor; |
| SkBlendMode mode; |
| bool asColorMode = cf.asColorMode(&filterColor, &mode); |
| SkAssertResult(asColorMode); |
| SkASSERT(mode == SkBlendMode::kSrcIn); |
| |
| { |
| // first flood with filter color |
| AutoElement floodElement("feFlood", fWriter); |
| floodElement.addAttribute("flood-color", svg_color(filterColor)); |
| floodElement.addAttribute("flood-opacity", svg_opacity(filterColor)); |
| floodElement.addAttribute("result", "flood"); |
| } |
| |
| { |
| // apply the transform to filter color |
| AutoElement compositeElement("feComposite", fWriter); |
| compositeElement.addAttribute("in", "flood"); |
| compositeElement.addAttribute("operator", "in"); |
| } |
| } |
| resources->fColorFilter.printf("url(#%s)", colorfilterID.c_str()); |
| } |
| |
| // Returns data uri from bytes. |
| // it will use any cached data if available, otherwise will |
| // encode as png. |
| sk_sp<SkData> AsDataUri(SkImage* image) { |
| sk_sp<SkData> imageData = image->encodeToData(); |
| if (!imageData) { |
| return nullptr; |
| } |
| |
| const char* src = (char*)imageData->data(); |
| const char* selectedPrefix = nullptr; |
| size_t selectedPrefixLength = 0; |
| |
| const static char pngDataPrefix[] = "data:image/png;base64,"; |
| const static char jpgDataPrefix[] = "data:image/jpeg;base64,"; |
| |
| if (SkJpegCodec::IsJpeg(src, imageData->size())) { |
| selectedPrefix = jpgDataPrefix; |
| selectedPrefixLength = sizeof(jpgDataPrefix); |
| } else { |
| if (!SkPngCodec::IsPng(src, imageData->size())) { |
| imageData = image->encodeToData(SkEncodedImageFormat::kPNG, 100); |
| } |
| selectedPrefix = pngDataPrefix; |
| selectedPrefixLength = sizeof(pngDataPrefix); |
| } |
| |
| size_t b64Size = SkBase64::Encode(imageData->data(), imageData->size(), nullptr); |
| sk_sp<SkData> dataUri = SkData::MakeUninitialized(selectedPrefixLength + b64Size); |
| char* dest = (char*)dataUri->writable_data(); |
| memcpy(dest, selectedPrefix, selectedPrefixLength); |
| SkBase64::Encode(imageData->data(), imageData->size(), dest + selectedPrefixLength - 1); |
| dest[dataUri->size() - 1] = 0; |
| return dataUri; |
| } |
| |
| void SkSVGDevice::AutoElement::addImageShaderResources(const SkShader* shader, const SkPaint& paint, |
| Resources* resources) { |
| SkMatrix outMatrix; |
| |
| SkShader::TileMode xy[2]; |
| SkImage* image = shader->isAImage(&outMatrix, xy); |
| SkASSERT(image); |
| |
| SkString patternDims[2]; // width, height |
| |
| sk_sp<SkData> dataUri = AsDataUri(image); |
| if (!dataUri) { |
| return; |
| } |
| SkIRect imageSize = image->bounds(); |
| for (int i = 0; i < 2; i++) { |
| int imageDimension = i == 0 ? imageSize.width() : imageSize.height(); |
| switch (xy[i]) { |
| case SkShader::kRepeat_TileMode: |
| patternDims[i].appendScalar(imageDimension); |
| break; |
| default: |
| // TODO: other tile modes? |
| patternDims[i] = "100%"; |
| } |
| } |
| |
| SkString patternID = fResourceBucket->addPattern(); |
| { |
| AutoElement pattern("pattern", fWriter); |
| pattern.addAttribute("id", patternID); |
| pattern.addAttribute("patternUnits", "userSpaceOnUse"); |
| pattern.addAttribute("patternContentUnits", "userSpaceOnUse"); |
| pattern.addAttribute("width", patternDims[0]); |
| pattern.addAttribute("height", patternDims[1]); |
| pattern.addAttribute("x", 0); |
| pattern.addAttribute("y", 0); |
| |
| { |
| SkString imageID = fResourceBucket->addImage(); |
| AutoElement imageTag("image", fWriter); |
| imageTag.addAttribute("id", imageID); |
| imageTag.addAttribute("x", 0); |
| imageTag.addAttribute("y", 0); |
| imageTag.addAttribute("width", image->width()); |
| imageTag.addAttribute("height", image->height()); |
| imageTag.addAttribute("xlink:href", static_cast<const char*>(dataUri->data())); |
| } |
| } |
| resources->fPaintServer.printf("url(#%s)", patternID.c_str()); |
| } |
| |
| void SkSVGDevice::AutoElement::addShaderResources(const SkPaint& paint, Resources* resources) { |
| const SkShader* shader = paint.getShader(); |
| SkASSERT(shader); |
| |
| if (shader->asAGradient(nullptr) != SkShader::kNone_GradientType) { |
| this->addGradientShaderResources(shader, paint, resources); |
| } else if (shader->isAImage()) { |
| this->addImageShaderResources(shader, paint, resources); |
| } |
| // TODO: other shader types? |
| } |
| |
| void SkSVGDevice::AutoElement::addClipResources(const MxCp& mc, Resources* resources) { |
| SkASSERT(!mc.fClipStack->isWideOpen()); |
| |
| SkPath clipPath; |
| (void) mc.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 SkFont& font) { |
| this->addAttribute("font-size", font.getSize()); |
| |
| SkString familyName; |
| SkTHashSet<SkString> familySet; |
| sk_sp<SkTypeface> tface = font.refTypefaceOrDefault(); |
| |
| SkASSERT(tface); |
| SkFontStyle style = tface->fontStyle(); |
| if (style.slant() == SkFontStyle::kItalic_Slant) { |
| this->addAttribute("font-style", "italic"); |
| } else if (style.slant() == SkFontStyle::kOblique_Slant) { |
| this->addAttribute("font-style", "oblique"); |
| } |
| int weightIndex = (SkTPin(style.weight(), 100, 900) - 50) / 100; |
| if (weightIndex != 3) { |
| static constexpr const char* weights[] = { |
| "100", "200", "300", "normal", "400", "500", "600", "bold", "800", "900" |
| }; |
| this->addAttribute("font-weight", weights[weightIndex]); |
| } |
| int stretchIndex = style.width() - 1; |
| if (stretchIndex != 4) { |
| static constexpr const char* stretches[] = { |
| "ultra-condensed", "extra-condensed", "condensed", "semi-condensed", |
| "normal", |
| "semi-expanded", "expanded", "extra-expanded", "ultra-expanded" |
| }; |
| this->addAttribute("font-stretch", stretches[stretchIndex]); |
| } |
| |
| sk_sp<SkTypeface::LocalizedStrings> familyNameIter(tface->createFamilyNameIterator()); |
| SkTypeface::LocalizedString familyString; |
| if (familyNameIter) { |
| 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, bool ownsWriter) { |
| if (!writer) { |
| return nullptr; |
| } |
| |
| return new SkSVGDevice(size, writer, ownsWriter); |
| } |
| |
| SkSVGDevice::SkSVGDevice(const SkISize& size, SkXMLWriter* writer, bool ownsWriter) |
| : INHERITED(SkImageInfo::MakeUnknown(size.fWidth, size.fHeight), |
| SkSurfaceProps(0, kUnknown_SkPixelGeometry)) |
| , fWriter(writer) |
| , fOwnsWriter(ownsWriter) |
| , 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() { |
| if (fOwnsWriter && fWriter) { |
| fRootElement.reset(nullptr); |
| delete fWriter; |
| } |
| } |
| |
| void SkSVGDevice::drawPaint(const SkPaint& paint) { |
| AutoElement rect("rect", fWriter, fResourceBucket.get(), MxCp(this), paint); |
| rect.addRectAttributes(SkRect::MakeWH(SkIntToScalar(this->width()), |
| SkIntToScalar(this->height()))); |
| } |
| |
| void SkSVGDevice::drawAnnotation(const SkRect& rect, const char key[], SkData* value) { |
| if (!value) { |
| return; |
| } |
| |
| if (!strcmp(SkAnnotationKeys::URL_Key(), key) || |
| !strcmp(SkAnnotationKeys::Link_Named_Dest_Key(), key)) { |
| this->cs().save(); |
| this->cs().clipRect(rect, this->ctm(), kIntersect_SkClipOp, true); |
| SkRect transformedRect = this->cs().bounds(this->getGlobalBounds()); |
| this->cs().restore(); |
| if (transformedRect.isEmpty()) { |
| return; |
| } |
| |
| SkString url(static_cast<const char*>(value->data()), value->size() - 1); |
| AutoElement a("a", fWriter); |
| a.addAttribute("xlink:href", url.c_str()); |
| { |
| AutoElement r("rect", fWriter); |
| r.addAttribute("fill-opacity", "0.0"); |
| r.addRectAttributes(transformedRect); |
| } |
| } |
| } |
| |
| void SkSVGDevice::drawPoints(SkCanvas::PointMode mode, size_t count, |
| const SkPoint pts[], const SkPaint& paint) { |
| SkPath path; |
| |
| switch (mode) { |
| // todo |
| case SkCanvas::kPoints_PointMode: |
| // TODO? |
| 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(), MxCp(this), 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(), MxCp(this), paint); |
| elem.addPathAttributes(path); |
| } |
| break; |
| } |
| } |
| |
| void SkSVGDevice::drawRect(const SkRect& r, const SkPaint& paint) { |
| std::unique_ptr<AutoElement> svg; |
| if (RequiresViewportReset(paint)) { |
| svg.reset(new AutoElement("svg", fWriter, fResourceBucket.get(), MxCp(this), paint)); |
| svg->addRectAttributes(r); |
| } |
| |
| AutoElement rect("rect", fWriter, fResourceBucket.get(), MxCp(this), paint); |
| |
| if (svg) { |
| rect.addAttribute("x", 0); |
| rect.addAttribute("y", 0); |
| rect.addAttribute("width", "100%"); |
| rect.addAttribute("height", "100%"); |
| } else { |
| rect.addRectAttributes(r); |
| } |
| } |
| |
| void SkSVGDevice::drawOval(const SkRect& oval, const SkPaint& paint) { |
| AutoElement ellipse("ellipse", fWriter, fResourceBucket.get(), MxCp(this), 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 SkRRect& rr, const SkPaint& paint) { |
| SkPath path; |
| path.addRRect(rr); |
| |
| AutoElement elem("path", fWriter, fResourceBucket.get(), MxCp(this), paint); |
| elem.addPathAttributes(path); |
| } |
| |
| void SkSVGDevice::drawPath(const SkPath& path, const SkPaint& paint, bool pathIsMutable) { |
| AutoElement elem("path", fWriter, fResourceBucket.get(), MxCp(this), paint); |
| elem.addPathAttributes(path); |
| |
| // TODO: inverse fill types? |
| if (path.getFillType() == SkPath::kEvenOdd_FillType) { |
| elem.addAttribute("fill-rule", "evenodd"); |
| } |
| } |
| |
| static sk_sp<SkData> encode(const SkBitmap& src) { |
| SkDynamicMemoryWStream buf; |
| return SkEncodeImage(&buf, src, SkEncodedImageFormat::kPNG, 80) ? buf.detachAsData() : nullptr; |
| } |
| |
| void SkSVGDevice::drawBitmapCommon(const MxCp& mc, const SkBitmap& bm, const SkPaint& paint) { |
| sk_sp<SkData> pngData = encode(bm); |
| 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(), mc, paint); |
| imageUse.addAttribute("xlink:href", SkStringPrintf("#%s", imageID.c_str())); |
| } |
| } |
| |
| void SkSVGDevice::drawSprite(const SkBitmap& bitmap, |
| int x, int y, const SkPaint& paint) { |
| MxCp mc(this); |
| SkMatrix adjustedMatrix = *mc.fMatrix; |
| adjustedMatrix.preTranslate(SkIntToScalar(x), SkIntToScalar(y)); |
| mc.fMatrix = &adjustedMatrix; |
| |
| drawBitmapCommon(mc, bitmap, paint); |
| } |
| |
| void SkSVGDevice::drawBitmapRect(const SkBitmap& bm, const SkRect* srcOrNull, |
| const SkRect& dst, const SkPaint& paint, |
| SkCanvas::SrcRectConstraint) { |
| SkClipStack* cs = &this->cs(); |
| SkClipStack::AutoRestore ar(cs, false); |
| if (srcOrNull && *srcOrNull != SkRect::Make(bm.bounds())) { |
| cs->save(); |
| cs->clipRect(dst, this->ctm(), kIntersect_SkClipOp, paint.isAntiAlias()); |
| } |
| |
| SkMatrix adjustedMatrix; |
| adjustedMatrix.setRectToRect(srcOrNull ? *srcOrNull : SkRect::Make(bm.bounds()), |
| dst, |
| SkMatrix::kFill_ScaleToFit); |
| adjustedMatrix.postConcat(this->ctm()); |
| |
| drawBitmapCommon(MxCp(&adjustedMatrix, cs), bm, paint); |
| } |
| |
| class SVGTextBuilder : SkNoncopyable { |
| public: |
| SVGTextBuilder(SkPoint origin, const SkGlyphRun& glyphRun) |
| : fOrigin(origin) |
| , fLastCharWasWhitespace(true) { // start off in whitespace mode to strip all leadingspace |
| auto runSize = glyphRun.runSize(); |
| SkAutoSTArray<64, SkUnichar> unichars(runSize); |
| glyphRun.font().glyphsToUnichars(glyphRun.glyphsIDs().data(), runSize, unichars.get()); |
| auto positions = glyphRun.positions(); |
| for (size_t i = 0; i < runSize; ++i) { |
| this->appendUnichar(unichars[i], positions[i]); |
| } |
| } |
| |
| const SkString& text() const { return fText; } |
| const SkString& posX() const { return fPosX; } |
| const SkString& posY() const { return fPosY; } |
| |
| private: |
| void appendUnichar(SkUnichar c, SkPoint position) { |
| 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, position); |
| fLastCharWasWhitespace = isWhitespace; |
| } |
| |
| void advancePos(bool discard, SkPoint position) { |
| if (!discard) { |
| SkPoint finalPosition = fOrigin + position; |
| fPosX.appendf("%.8g, ", finalPosition.x()); |
| fPosY.appendf("%.8g, ", finalPosition.y()); |
| } |
| } |
| |
| const SkPoint fOrigin; |
| |
| SkString fText, fPosX, fPosY; |
| bool fLastCharWasWhitespace; |
| }; |
| |
| void SkSVGDevice::drawGlyphRunList(const SkGlyphRunList& glyphRunList) { |
| |
| auto processGlyphRun = [this] |
| (SkPoint origin, const SkGlyphRun& glyphRun, const SkPaint& runPaint) { |
| AutoElement elem("text", fWriter, fResourceBucket.get(), MxCp(this), runPaint); |
| elem.addTextAttributes(glyphRun.font()); |
| |
| SVGTextBuilder builder(origin, glyphRun); |
| elem.addAttribute("x", builder.posX()); |
| elem.addAttribute("y", builder.posY()); |
| elem.addText(builder.text()); |
| }; |
| |
| for (auto& glyphRun : glyphRunList) { |
| processGlyphRun(glyphRunList.origin(), glyphRun, glyphRunList.paint()); |
| } |
| } |
| |
| void SkSVGDevice::drawVertices(const SkVertices*, const SkVertices::Bone[], int, SkBlendMode, |
| const SkPaint&) { |
| // todo |
| } |
| |
| void SkSVGDevice::drawDevice(SkBaseDevice*, int x, int y, |
| const SkPaint&) { |
| // todo |
| } |