SkSVGDevice.cpp File Reference

#include "src/svg/SkSVGDevice.h"
#include "include/core/SkBitmap.h"
#include "include/core/SkBlendMode.h"
#include "include/core/SkClipOp.h"
#include "include/core/SkColor.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkData.h"
#include "include/core/SkDataTable.h"
#include "include/core/SkFont.h"
#include "include/core/SkFontStyle.h"
#include "include/core/SkImage.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPath.h"
#include "include/core/SkPathBuilder.h"
#include "include/core/SkPathEffect.h"
#include "include/core/SkPathTypes.h"
#include "include/core/SkPathUtils.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRRect.h"
#include "include/core/SkRect.h"
#include "include/core/SkScalar.h"
#include "include/core/SkShader.h"
#include "include/core/SkSize.h"
#include "include/core/SkSpan.h"
#include "include/core/SkStream.h"
#include "include/core/SkString.h"
#include "include/core/SkSurfaceProps.h"
#include "include/core/SkTileMode.h"
#include "include/core/SkTypeface.h"
#include "include/encode/SkPngEncoder.h"
#include "include/private/base/SkDebug.h"
#include "include/private/base/SkNoncopyable.h"
#include "include/private/base/SkTPin.h"
#include "include/private/base/SkTemplates.h"
#include "include/private/base/SkTo.h"
#include "include/svg/SkSVGCanvas.h"
#include "src/base/SkBase64.h"
#include "src/base/SkTLazy.h"
#include "src/core/SkAnnotationKeys.h"
#include "src/core/SkClipStack.h"
#include "src/core/SkDevice.h"
#include "src/core/SkFontPriv.h"
#include "src/core/SkTHash.h"
#include "src/image/SkImage_Base.h"
#include "src/shaders/SkColorShader.h"
#include "src/shaders/SkShaderBase.h"
#include "src/text/GlyphRun.h"
#include "src/xml/SkXMLWriter.h"
#include <cstring>
#include <memory>
#include <string>
#include <utility>

Go to the source code of this file.

Classes
class	SkSVGDevice::ResourceBucket
struct	SkSVGDevice::MxCp
class	SkSVGDevice::AutoElement
class	SVGTextBuilder

Functions
static bool	is_png (const void *bytes, size_t length)
static bool	is_jpeg (const void *bytes, size_t length)
sk_sp< SkData >	AsDataUri (SkImage *image)
static sk_sp< SkData >	encode (const SkBitmap &src)

Function Documentation

AsDataUri()

sk_sp< SkData > AsDataUri

(

SkImage *

image

)

Definition at line 519 of file SkSVGDevice.cpp.

                                        {
    static constexpr char jpgDataPrefix[] = "data:image/jpeg;base64,";
    static constexpr char pngDataPrefix[] = "data:image/png;base64,";
 
    SkASSERT(!image->isTextureBacked());
 
    const char* selectedPrefix = pngDataPrefix;
    size_t selectedPrefixLength = sizeof(pngDataPrefix);
 
    sk_sp<SkData> imageData = image->refEncodedData();
    if (imageData) {  // Already encoded as something
        if (is_jpeg(imageData->data(), imageData->size())) {
            selectedPrefix = jpgDataPrefix;
            selectedPrefixLength = sizeof(jpgDataPrefix);
        } else if (!is_png(imageData->data(), imageData->size())) {
            // re-encode the image as a PNG.
            // GrDirectContext is nullptr because we shouldn't have any texture-based images
            // passed in.
            imageData = SkPngEncoder::Encode(nullptr, image, {});
            if (!imageData) {
                return nullptr;
            }
        }
        // else, it's already encoded as a PNG - we don't need to do anything.
    } else {
        // It was not encoded as something, so we need to encode it as a PNG.
        imageData = SkPngEncoder::Encode(nullptr, image, {});
        if (!imageData) {
            return nullptr;
        }
    }
 
    size_t b64Size = SkBase64::EncodedSize(imageData->size());
    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;
}

encode()

static sk_sp< SkData > encode ( const SkBitmap &  src )

static

Definition at line 990 of file SkSVGDevice.cpp.

                                                 {
    SkDynamicMemoryWStream buf;
    return SkPngEncoder::Encode(&buf, src.pixmap(), {}) ? buf.detachAsData() : nullptr;
}

is_jpeg()

static bool is_jpeg ( const void *  bytes, size_t  length  )

static

Definition at line 511 of file SkSVGDevice.cpp.

                                                      {
    static constexpr uint8_t jpegSig[] = {0xFF, 0xD8, 0xFF};
    return length >= sizeof(jpegSig) && !memcmp(bytes, jpegSig, sizeof(jpegSig));
}

is_png()

static bool is_png ( const void *  bytes, size_t  length  )

static

Definition at line 506 of file SkSVGDevice.cpp.

                                                     {
    static constexpr uint8_t pngSig[] = {0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A};
    return length >= sizeof(pngSig) && !memcmp(bytes, pngSig, sizeof(pngSig));
}