electron/atom/common/api/atom_api_native_image.cc

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// Copyright (c) 2015 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#include "atom/common/api/atom_api_native_image.h"
#include <memory>
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#include <string>
#include <utility>
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#include <vector>
#include "atom/common/asar/asar_util.h"
#include "atom/common/native_mate_converters/file_path_converter.h"
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#include "atom/common/native_mate_converters/gfx_converter.h"
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#include "atom/common/native_mate_converters/gurl_converter.h"
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#include "atom/common/native_mate_converters/value_converter.h"
#include "atom/common/node_includes.h"
#include "base/files/file_util.h"
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#include "base/strings/pattern.h"
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#include "base/strings/string_util.h"
#include "base/threading/thread_restrictions.h"
#include "native_mate/object_template_builder.h"
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#include "net/base/data_url.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkImageInfo.h"
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#include "third_party/skia/include/core/SkPixelRef.h"
#include "ui/base/layout.h"
#include "ui/base/webui/web_ui_util.h"
#include "ui/gfx/codec/jpeg_codec.h"
#include "ui/gfx/codec/png_codec.h"
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#include "ui/gfx/geometry/size.h"
#include "ui/gfx/image/image_skia.h"
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#include "ui/gfx/image/image_skia_operations.h"
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#include "ui/gfx/image/image_util.h"
#if defined(OS_WIN)
#include "atom/common/asar/archive.h"
#include "base/win/scoped_gdi_object.h"
#include "ui/gfx/icon_util.h"
#endif
namespace atom {
namespace api {
namespace {
struct ScaleFactorPair {
const char* name;
float scale;
};
ScaleFactorPair kScaleFactorPairs[] = {
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// The "@2x" is put as first one to make scale matching faster.
{"@2x", 2.0f}, {"@3x", 3.0f}, {"@1x", 1.0f}, {"@4x", 4.0f},
{"@5x", 5.0f}, {"@1.25x", 1.25f}, {"@1.33x", 1.33f}, {"@1.4x", 1.4f},
{"@1.5x", 1.5f}, {"@1.8x", 1.8f}, {"@2.5x", 2.5f},
};
float GetScaleFactorFromPath(const base::FilePath& path) {
std::string filename(path.BaseName().RemoveExtension().AsUTF8Unsafe());
// We don't try to convert string to float here because it is very very
// expensive.
for (const auto& kScaleFactorPair : kScaleFactorPairs) {
if (base::EndsWith(filename, kScaleFactorPair.name,
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base::CompareCase::INSENSITIVE_ASCII))
return kScaleFactorPair.scale;
}
return 1.0f;
}
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// Get the scale factor from options object at the first argument
float GetScaleFactorFromOptions(mate::Arguments* args) {
float scale_factor = 1.0f;
mate::Dictionary options;
if (args->GetNext(&options))
options.Get("scaleFactor", &scale_factor);
return scale_factor;
}
bool AddImageSkiaRep(gfx::ImageSkia* image,
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const unsigned char* data,
size_t size,
int width,
int height,
double scale_factor) {
auto decoded = std::make_unique<SkBitmap>();
// Try PNG first.
if (!gfx::PNGCodec::Decode(data, size, decoded.get())) {
// Try JPEG.
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decoded = gfx::JPEGCodec::Decode(data, size);
if (decoded) {
// `JPEGCodec::Decode()` doesn't tell `SkBitmap` instance it creates
// that all of its pixels are opaque, that's why the bitmap gets
// an alpha type `kPremul_SkAlphaType` instead of `kOpaque_SkAlphaType`.
// Let's fix it here.
// TODO(alexeykuzmin): This workaround should be removed
// when the `JPEGCodec::Decode()` code is fixed.
// See https://github.com/electron/electron/issues/11294.
decoded->setAlphaType(SkAlphaType::kOpaque_SkAlphaType);
}
}
if (!decoded) {
// Try Bitmap
if (width > 0 && height > 0) {
decoded.reset(new SkBitmap);
decoded->allocN32Pixels(width, height, false);
decoded->setPixels(
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const_cast<void*>(reinterpret_cast<const void*>(data)));
} else {
return false;
}
}
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image->AddRepresentation(gfx::ImageSkiaRep(*decoded, scale_factor));
return true;
}
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bool AddImageSkiaRep(gfx::ImageSkia* image,
const base::FilePath& path,
double scale_factor) {
std::string file_contents;
{
base::ThreadRestrictions::ScopedAllowIO allow_io;
if (!asar::ReadFileToString(path, &file_contents))
return false;
}
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const unsigned char* data =
reinterpret_cast<const unsigned char*>(file_contents.data());
size_t size = file_contents.size();
return AddImageSkiaRep(image, data, size, 0, 0, scale_factor);
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}
bool PopulateImageSkiaRepsFromPath(gfx::ImageSkia* image,
const base::FilePath& path) {
bool succeed = false;
std::string filename(path.BaseName().RemoveExtension().AsUTF8Unsafe());
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if (base::MatchPattern(filename, "*@*x"))
// Don't search for other representations if the DPI has been specified.
return AddImageSkiaRep(image, path, GetScaleFactorFromPath(path));
else
succeed |= AddImageSkiaRep(image, path, 1.0f);
for (const ScaleFactorPair& pair : kScaleFactorPairs)
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succeed |= AddImageSkiaRep(
image, path.InsertBeforeExtensionASCII(pair.name), pair.scale);
return succeed;
}
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base::FilePath NormalizePath(const base::FilePath& path) {
if (!path.ReferencesParent()) {
return path;
}
base::FilePath absolute_path = MakeAbsoluteFilePath(path);
// MakeAbsoluteFilePath returns an empty path on failures so use original path
if (absolute_path.empty()) {
return path;
} else {
return absolute_path;
}
}
#if defined(OS_MACOSX)
bool IsTemplateFilename(const base::FilePath& path) {
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return (base::MatchPattern(path.value(), "*Template.*") ||
base::MatchPattern(path.value(), "*Template@*x.*"));
}
#endif
#if defined(OS_WIN)
base::win::ScopedHICON ReadICOFromPath(int size, const base::FilePath& path) {
// If file is in asar archive, we extract it to a temp file so LoadImage can
// load it.
base::FilePath asar_path, relative_path;
base::FilePath image_path(path);
if (asar::GetAsarArchivePath(image_path, &asar_path, &relative_path)) {
std::shared_ptr<asar::Archive> archive =
asar::GetOrCreateAsarArchive(asar_path);
if (archive)
archive->CopyFileOut(relative_path, &image_path);
}
// Load the icon from file.
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return base::win::ScopedHICON(
static_cast<HICON>(LoadImage(NULL, image_path.value().c_str(), IMAGE_ICON,
size, size, LR_LOADFROMFILE)));
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}
bool ReadImageSkiaFromICO(gfx::ImageSkia* image, HICON icon) {
// Convert the icon from the Windows specific HICON to gfx::ImageSkia.
SkBitmap bitmap = IconUtil::CreateSkBitmapFromHICON(icon);
if (bitmap.isNull())
return false;
image->AddRepresentation(gfx::ImageSkiaRep(bitmap, 1.0f));
return true;
}
#endif
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void Noop(char*, void*) {}
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} // namespace
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NativeImage::NativeImage(v8::Isolate* isolate, const gfx::Image& image)
: image_(image) {
Init(isolate);
if (image_.HasRepresentation(gfx::Image::kImageRepSkia)) {
isolate->AdjustAmountOfExternalAllocatedMemory(
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image_.ToImageSkia()->bitmap()->computeByteSize());
}
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}
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#if defined(OS_WIN)
NativeImage::NativeImage(v8::Isolate* isolate, const base::FilePath& hicon_path)
: hicon_path_(hicon_path) {
// Use the 256x256 icon as fallback icon.
gfx::ImageSkia image_skia;
ReadImageSkiaFromICO(&image_skia, GetHICON(256));
image_ = gfx::Image(image_skia);
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Init(isolate);
if (image_.HasRepresentation(gfx::Image::kImageRepSkia)) {
isolate->AdjustAmountOfExternalAllocatedMemory(
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image_.ToImageSkia()->bitmap()->computeByteSize());
}
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}
#endif
NativeImage::~NativeImage() {
if (image_.HasRepresentation(gfx::Image::kImageRepSkia)) {
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isolate()->AdjustAmountOfExternalAllocatedMemory(-static_cast<int64_t>(
image_.ToImageSkia()->bitmap()->computeByteSize()));
}
}
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#if defined(OS_WIN)
HICON NativeImage::GetHICON(int size) {
auto iter = hicons_.find(size);
if (iter != hicons_.end())
return iter->second.get();
// First try loading the icon with specified size.
if (!hicon_path_.empty()) {
hicons_[size] = ReadICOFromPath(size, hicon_path_);
return hicons_[size].get();
}
// Then convert the image to ICO.
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if (image_.IsEmpty())
return NULL;
hicons_[size] = IconUtil::CreateHICONFromSkBitmap(image_.AsBitmap());
return hicons_[size].get();
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}
#endif
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v8::Local<v8::Value> NativeImage::ToPNG(mate::Arguments* args) {
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float scale_factor = GetScaleFactorFromOptions(args);
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if (scale_factor == 1.0f) {
// Use raw 1x PNG bytes when available
scoped_refptr<base::RefCountedMemory> png = image_.As1xPNGBytes();
if (png->size() > 0) {
const char* data = reinterpret_cast<const char*>(png->front());
size_t size = png->size();
return node::Buffer::Copy(args->isolate(), data, size).ToLocalChecked();
}
}
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const SkBitmap bitmap =
image_.AsImageSkia().GetRepresentation(scale_factor).GetBitmap();
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std::vector<unsigned char> encoded;
gfx::PNGCodec::EncodeBGRASkBitmap(bitmap, false, &encoded);
const char* data = reinterpret_cast<char*>(encoded.data());
size_t size = encoded.size();
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return node::Buffer::Copy(args->isolate(), data, size).ToLocalChecked();
}
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v8::Local<v8::Value> NativeImage::ToBitmap(mate::Arguments* args) {
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float scale_factor = GetScaleFactorFromOptions(args);
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const SkBitmap bitmap =
image_.AsImageSkia().GetRepresentation(scale_factor).GetBitmap();
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SkPixelRef* ref = bitmap.pixelRef();
if (!ref)
return node::Buffer::New(args->isolate(), 0).ToLocalChecked();
return node::Buffer::Copy(args->isolate(),
reinterpret_cast<const char*>(ref->pixels()),
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bitmap.computeByteSize())
.ToLocalChecked();
}
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v8::Local<v8::Value> NativeImage::ToJPEG(v8::Isolate* isolate, int quality) {
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std::vector<unsigned char> output;
gfx::JPEG1xEncodedDataFromImage(image_, quality, &output);
if (output.empty())
return node::Buffer::New(isolate, 0).ToLocalChecked();
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return node::Buffer::Copy(isolate,
reinterpret_cast<const char*>(&output.front()),
output.size())
.ToLocalChecked();
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}
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std::string NativeImage::ToDataURL(mate::Arguments* args) {
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float scale_factor = GetScaleFactorFromOptions(args);
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if (scale_factor == 1.0f) {
// Use raw 1x PNG bytes when available
scoped_refptr<base::RefCountedMemory> png = image_.As1xPNGBytes();
if (png->size() > 0)
return webui::GetPngDataUrl(png->front(), png->size());
}
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return webui::GetBitmapDataUrl(
image_.AsImageSkia().GetRepresentation(scale_factor).GetBitmap());
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}
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v8::Local<v8::Value> NativeImage::GetBitmap(mate::Arguments* args) {
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float scale_factor = GetScaleFactorFromOptions(args);
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const SkBitmap bitmap =
image_.AsImageSkia().GetRepresentation(scale_factor).GetBitmap();
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SkPixelRef* ref = bitmap.pixelRef();
if (!ref)
return node::Buffer::New(args->isolate(), 0).ToLocalChecked();
return node::Buffer::New(args->isolate(),
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reinterpret_cast<char*>(ref->pixels()),
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bitmap.computeByteSize(), &Noop, nullptr)
.ToLocalChecked();
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}
v8::Local<v8::Value> NativeImage::GetNativeHandle(v8::Isolate* isolate,
mate::Arguments* args) {
#if defined(OS_MACOSX)
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if (IsEmpty())
return node::Buffer::New(isolate, 0).ToLocalChecked();
NSImage* ptr = image_.AsNSImage();
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return node::Buffer::Copy(isolate, reinterpret_cast<char*>(ptr),
sizeof(void*))
.ToLocalChecked();
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#else
args->ThrowError("Not implemented");
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return v8::Undefined(isolate);
#endif
}
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bool NativeImage::IsEmpty() {
return image_.IsEmpty();
}
gfx::Size NativeImage::GetSize() {
return image_.Size();
}
float NativeImage::GetAspectRatio() {
gfx::Size size = GetSize();
if (size.IsEmpty())
return 1.f;
else
return static_cast<float>(size.width()) / static_cast<float>(size.height());
}
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mate::Handle<NativeImage> NativeImage::Resize(
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v8::Isolate* isolate,
const base::DictionaryValue& options) {
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gfx::Size size = GetSize();
int width = size.width();
int height = size.height();
bool width_set = options.GetInteger("width", &width);
bool height_set = options.GetInteger("height", &height);
size.SetSize(width, height);
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if (width_set && !height_set) {
// Scale height to preserve original aspect ratio
size.set_height(width);
size = gfx::ScaleToRoundedSize(size, 1.f, 1.f / GetAspectRatio());
} else if (height_set && !width_set) {
// Scale width to preserve original aspect ratio
size.set_width(height);
size = gfx::ScaleToRoundedSize(size, GetAspectRatio(), 1.f);
}
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skia::ImageOperations::ResizeMethod method =
skia::ImageOperations::ResizeMethod::RESIZE_BEST;
std::string quality;
options.GetString("quality", &quality);
if (quality == "good")
method = skia::ImageOperations::ResizeMethod::RESIZE_GOOD;
else if (quality == "better")
method = skia::ImageOperations::ResizeMethod::RESIZE_BETTER;
gfx::ImageSkia resized = gfx::ImageSkiaOperations::CreateResizedImage(
image_.AsImageSkia(), method, size);
return mate::CreateHandle(isolate,
new NativeImage(isolate, gfx::Image(resized)));
}
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mate::Handle<NativeImage> NativeImage::Crop(v8::Isolate* isolate,
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const gfx::Rect& rect) {
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gfx::ImageSkia cropped =
gfx::ImageSkiaOperations::ExtractSubset(image_.AsImageSkia(), rect);
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return mate::CreateHandle(isolate,
new NativeImage(isolate, gfx::Image(cropped)));
}
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void NativeImage::AddRepresentation(const mate::Dictionary& options) {
int width = 0;
int height = 0;
float scale_factor = 1.0f;
options.Get("width", &width);
options.Get("height", &height);
options.Get("scaleFactor", &scale_factor);
bool skia_rep_added = false;
gfx::ImageSkia image_skia = image_.AsImageSkia();
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v8::Local<v8::Value> buffer;
GURL url;
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if (options.Get("buffer", &buffer) && node::Buffer::HasInstance(buffer)) {
AddImageSkiaRep(
&image_skia,
reinterpret_cast<unsigned char*>(node::Buffer::Data(buffer)),
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node::Buffer::Length(buffer), width, height, scale_factor);
skia_rep_added = true;
} else if (options.Get("dataURL", &url)) {
std::string mime_type, charset, data;
if (net::DataURL::Parse(url, &mime_type, &charset, &data)) {
if (mime_type == "image/png" || mime_type == "image/jpeg") {
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AddImageSkiaRep(&image_skia,
reinterpret_cast<const unsigned char*>(data.c_str()),
data.size(), width, height, scale_factor);
skia_rep_added = true;
}
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}
}
// Re-initialize image when first representation is added to an empty image
if (skia_rep_added && IsEmpty()) {
gfx::Image image(image_skia);
image_ = std::move(image);
}
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}
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#if !defined(OS_MACOSX)
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void NativeImage::SetTemplateImage(bool setAsTemplate) {}
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bool NativeImage::IsTemplateImage() {
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return false;
}
#endif
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// static
mate::Handle<NativeImage> NativeImage::CreateEmpty(v8::Isolate* isolate) {
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return mate::CreateHandle(isolate, new NativeImage(isolate, gfx::Image()));
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}
// static
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mate::Handle<NativeImage> NativeImage::Create(v8::Isolate* isolate,
const gfx::Image& image) {
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return mate::CreateHandle(isolate, new NativeImage(isolate, image));
}
// static
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mate::Handle<NativeImage> NativeImage::CreateFromPNG(v8::Isolate* isolate,
const char* buffer,
size_t length) {
gfx::Image image = gfx::Image::CreateFrom1xPNGBytes(
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reinterpret_cast<const unsigned char*>(buffer), length);
return Create(isolate, image);
}
// static
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mate::Handle<NativeImage> NativeImage::CreateFromJPEG(v8::Isolate* isolate,
const char* buffer,
size_t length) {
gfx::Image image = gfx::ImageFrom1xJPEGEncodedData(
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reinterpret_cast<const unsigned char*>(buffer), length);
return Create(isolate, image);
}
// static
mate::Handle<NativeImage> NativeImage::CreateFromPath(
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v8::Isolate* isolate,
const base::FilePath& path) {
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base::FilePath image_path = NormalizePath(path);
#if defined(OS_WIN)
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if (image_path.MatchesExtension(FILE_PATH_LITERAL(".ico"))) {
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return mate::CreateHandle(isolate, new NativeImage(isolate, image_path));
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}
#endif
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gfx::ImageSkia image_skia;
PopulateImageSkiaRepsFromPath(&image_skia, image_path);
gfx::Image image(image_skia);
mate::Handle<NativeImage> handle = Create(isolate, image);
#if defined(OS_MACOSX)
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if (IsTemplateFilename(image_path))
handle->SetTemplateImage(true);
#endif
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return handle;
}
// static
mate::Handle<NativeImage> NativeImage::CreateFromBitmap(
mate::Arguments* args,
v8::Local<v8::Value> buffer,
const mate::Dictionary& options) {
if (!node::Buffer::HasInstance(buffer)) {
args->ThrowError("buffer must be a node Buffer");
return mate::Handle<NativeImage>();
}
unsigned int width = 0;
unsigned int height = 0;
double scale_factor = 1.;
if (!options.Get("width", &width)) {
args->ThrowError("width is required");
return mate::Handle<NativeImage>();
}
if (!options.Get("height", &height)) {
args->ThrowError("height is required");
return mate::Handle<NativeImage>();
}
auto info = SkImageInfo::MakeN32(width, height, kPremul_SkAlphaType);
auto size_bytes = info.computeMinByteSize();
if (size_bytes != node::Buffer::Length(buffer)) {
args->ThrowError("invalid buffer size");
return mate::Handle<NativeImage>();
}
options.Get("scaleFactor", &scale_factor);
if (width == 0 || height == 0) {
return CreateEmpty(args->isolate());
}
SkBitmap bitmap;
bitmap.allocN32Pixels(width, height, false);
bitmap.setPixels(node::Buffer::Data(buffer));
gfx::ImageSkia image_skia;
image_skia.AddRepresentation(gfx::ImageSkiaRep(bitmap, scale_factor));
return Create(args->isolate(), gfx::Image(image_skia));
}
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// static
mate::Handle<NativeImage> NativeImage::CreateFromBuffer(
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mate::Arguments* args,
v8::Local<v8::Value> buffer) {
if (!node::Buffer::HasInstance(buffer)) {
args->ThrowError("buffer must be a node Buffer");
return mate::Handle<NativeImage>();
}
int width = 0;
int height = 0;
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double scale_factor = 1.;
mate::Dictionary options;
if (args->GetNext(&options)) {
options.Get("width", &width);
options.Get("height", &height);
options.Get("scaleFactor", &scale_factor);
}
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gfx::ImageSkia image_skia;
AddImageSkiaRep(&image_skia,
reinterpret_cast<unsigned char*>(node::Buffer::Data(buffer)),
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node::Buffer::Length(buffer), width, height, scale_factor);
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return Create(args->isolate(), gfx::Image(image_skia));
}
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// static
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mate::Handle<NativeImage> NativeImage::CreateFromDataURL(v8::Isolate* isolate,
const GURL& url) {
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std::string mime_type, charset, data;
if (net::DataURL::Parse(url, &mime_type, &charset, &data)) {
if (mime_type == "image/png")
return CreateFromPNG(isolate, data.c_str(), data.size());
else if (mime_type == "image/jpeg")
return CreateFromJPEG(isolate, data.c_str(), data.size());
}
return CreateEmpty(isolate);
}
#if !defined(OS_MACOSX)
mate::Handle<NativeImage> NativeImage::CreateFromNamedImage(
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mate::Arguments* args,
const std::string& name) {
return CreateEmpty(args->isolate());
}
#endif
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// static
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void NativeImage::BuildPrototype(v8::Isolate* isolate,
v8::Local<v8::FunctionTemplate> prototype) {
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prototype->SetClassName(mate::StringToV8(isolate, "NativeImage"));
mate::ObjectTemplateBuilder(isolate, prototype->PrototypeTemplate())
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.SetMethod("toPNG", &NativeImage::ToPNG)
.SetMethod("toJPEG", &NativeImage::ToJPEG)
.SetMethod("toBitmap", &NativeImage::ToBitmap)
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.SetMethod("getBitmap", &NativeImage::GetBitmap)
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.SetMethod("getNativeHandle", &NativeImage::GetNativeHandle)
.SetMethod("toDataURL", &NativeImage::ToDataURL)
.SetMethod("isEmpty", &NativeImage::IsEmpty)
.SetMethod("getSize", &NativeImage::GetSize)
.SetMethod("setTemplateImage", &NativeImage::SetTemplateImage)
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.SetMethod("isTemplateImage", &NativeImage::IsTemplateImage)
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.SetMethod("resize", &NativeImage::Resize)
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.SetMethod("crop", &NativeImage::Crop)
.SetMethod("getAspectRatio", &NativeImage::GetAspectRatio)
.SetMethod("addRepresentation", &NativeImage::AddRepresentation);
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}
} // namespace api
} // namespace atom
namespace mate {
v8::Local<v8::Value> Converter<mate::Handle<atom::api::NativeImage>>::ToV8(
v8::Isolate* isolate,
const mate::Handle<atom::api::NativeImage>& val) {
return val.ToV8();
}
bool Converter<mate::Handle<atom::api::NativeImage>>::FromV8(
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v8::Isolate* isolate,
v8::Local<v8::Value> val,
mate::Handle<atom::api::NativeImage>* out) {
// Try converting from file path.
base::FilePath path;
if (ConvertFromV8(isolate, val, &path)) {
*out = atom::api::NativeImage::CreateFromPath(isolate, path);
// Should throw when failed to initialize from path.
return !(*out)->image().IsEmpty();
}
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WrappableBase* wrapper =
static_cast<WrappableBase*>(internal::FromV8Impl(isolate, val));
if (!wrapper)
return false;
*out = CreateHandle(isolate, static_cast<atom::api::NativeImage*>(wrapper));
return true;
}
} // namespace mate
namespace {
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void Initialize(v8::Local<v8::Object> exports,
v8::Local<v8::Value> unused,
v8::Local<v8::Context> context,
void* priv) {
mate::Dictionary dict(context->GetIsolate(), exports);
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dict.SetMethod("createEmpty", &atom::api::NativeImage::CreateEmpty);
dict.SetMethod("createFromPath", &atom::api::NativeImage::CreateFromPath);
dict.SetMethod("createFromBitmap", &atom::api::NativeImage::CreateFromBitmap);
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dict.SetMethod("createFromBuffer", &atom::api::NativeImage::CreateFromBuffer);
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dict.SetMethod("createFromDataURL",
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&atom::api::NativeImage::CreateFromDataURL);
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dict.SetMethod("createFromNamedImage",
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&atom::api::NativeImage::CreateFromNamedImage);
}
} // namespace
NODE_LINKED_MODULE_CONTEXT_AWARE(atom_common_native_image, Initialize)