Mbed OS version of IoT.js implementation running on GR-PEACH

ビルド方法

ビルド環境セットアップ

Host PC要件 : Ubuntu 16.04 (64-bit)



1. 以下のコマンドを実行し、下表に示すツールをインストールします。

$ sudo apt update
$ sudo apt upgrade
$ sudo apt install [Package]
PackageVersion
build-essential12.1ubuntu2
gyp0.1+20150913git1f374df9-1ubuntu1
mercurial3.7.3-1ubuntu1
cmake3.5.1-1ubuntu3
git1:2.7.4-0ubuntu1.4
python2.72.7.12-1ubuntu016.04.3
valgrind1:3.11.0-1ubuntu4.2
python-pip8.1.1-2ubuntu0.4

2. 以下のコマンドを実行してMbed OS用ビルドツール mbed CLIをインストールします。

$ sudo -H pip install mbed-cli

3. GNU Arm Embedded Toolchainをインストールします。

  • ダウンロードしたファイルを任意のディレクトリに展開します。
    (以下、展開先を${TOOLCHAIN}と記載します)

tar xjf gcc-arm-none-eabi-6-2017-q2-update-linux.tar.bz2
  • ツールチェインのパスを設定します。

環境変数を使用する場合

$ export GCC_ARM_ROOT=${TOOLCHAIN}/gcc-arm-none-eabi-6-2017-q2-update/bin
$ export PATH=$GCC_ARM_ROOT:$PATH

mbed CLIで指定する場合

$ mbed config -G GCC_ARM_PATH $GCC_ARM_ROOT

iotjs環境のビルド

1. 本プログラムのクローン

下記コマンドを実行し、本プログラムをクローンしてください。

$ hg clone https://HinoNaka@os.mbed.com/users/HinoNaka/code/GR-PEACH_mbed-os-iotjs/

クローンが正常に終了すると、GR-PEACH_mbed-os-iotjs という名称のディレクトリが生成されますので、下記コマンドで当該ディレクトリへ移動してください。

$ cd GR-PEACH_mbed-os-iotjs

(Optional)
GR-PEACH-mbed-os-iotjsディレクトリを指す環境変数 ROOTを設定してください。以降の記載は本環境変数が設定されているものとします。

$ export ROOT=$(PWD)

2. 作業用ディレクトリ(e.g. work)を作成し、当該ディレクトリに移動してください。

$ mkdir -p work
$ cd work

(Optional)
作業用ディレクトリを指す環境変数 WORK を設定してください。以降の記載は本環境変数 が設定されているものとします。

$ export WORK=$(PWD)

3. iotjsのソースツリーを取得します。

$ git clone https://github.com/pando-project/iotjs

クローンが正常に終了するとiotjsというディレクトリが生成されますので、当該ディレクトリに移動してください。

$cd iotjs

コミットID: acae9c8b2d40e7598b8d39b630b79113ce880a7e を取得します。
(下記例では、あわせてposixというブランチを作成し、当該ブランチへ切り替えています)

$ git checkout -b posix acae9c8b2d40e7598b8d39b630b79113ce880a7e

4. mbed-osセットアップ
Mbed OSソースツリーを格納するフォルダを生成し、当該フォルダへ移動します。

$ mkdir -p $(WORK)/iotjs/src/platform/mbedos5
$ cd $(WORK)/iotjs/src/platform/mbedos5

Mbed OSのソースツリーをクローンします。

$ git clone -b mbed-os-5.9 https://github.com/ARMmbed/mbed-os.git

クローンが正常に終了するとmbed-osというディレクトリが生成されますので、当該ディレクトリに移動してください。

$ cd mbed-os

コミットID: 50bd61a4a72332baa6b1bac6caccb44dc5423309 を取得します。
(下記例では、あわせてposixというブランチを作成し、当該ブランチへ切り替えています)

$ git checkout -b posix 50bd61a4a72332baa6b1bac6caccb44dc5423309

5. sd-driverの取得
下記コマンドでmbedos5ディレクトリへ移動します。

$ cd $(WORK)/iotjs/src/platform/mbedos5

sd-driverをクローンします。

$ git clone https://github.com/ARMmbed/sd-driver.git

クローンが正常終了するとsd-driverディレクトリが生成されますので、当該ディレクトリへ移動します。

$ cd sd-driver

コミットID: c8ae38fb291e086232566b0f1372cfb69c277e84 を取得します。
(下記例では、あわせてposixというブランチを作成し、当該ブランチへ切り替えています)

$ git checkout -b posix c8ae38fb291e086232566b0f1372cfb69c277e84

6. mbed-gr-libsの取得
下記コマンドでmbedos5ディレクトリへ移動します。

$ cd $(WORK)/iotjs/src/platform/mbedos5

mbed-gr-libsをクローンします。

$ git clone https://github.com/d-kato/mbed-gr-libs

クローンが正常終了するとmbed-gr-libsディレクトリが生成されますので、当該ディレクトリへ移動します。

$ cd mbed-gr-libs

コミットID: d921d611d596ecaebaab49070ef82450c583309c を取得します。
(下記例では、あわせてposixというブランチを作成し、当該ブランチへ切り替えています)

$ git checkout -b posix d921d611d596ecaebaab49070ef82450c583309c

7. AsciiFONTの取得
下記コマンドでmbedos5ディレクトリへ移動します。

$ cd $(WORK)/iotjs/src/platform/mbedos5

AsciiFONTライブラリを追加します。

$ mbed add https://os.mbed.com/teams/Renesas/code/AsciiFont/

8. iotjs環境のビルド
下記コマンドでiotjs環境のビルドディレクトリに移動し、ビルドを実行します。

$ cd $(WORK)/iotjs
$ ./tools/build.py --no-snapshot

9. GR-PEACH用コードのコピー
(Optional) 既存のiotjs環境に上書きする場合、下記コマンドを実行してください。

$ rm -rf $(WORK)/iotjs/deps/posix
$ rm -rf $(WORK)/iotjs/src/ext-modules
$ rm -rf $(WORK)/iotjs/src/platform/mbedos5/iotjs_def.h

下記コマンドでGR-PEACH用コードをコピーします。

$ cp -pr $(ROOT)/src/iotjs/* $(WORK)/iotjs/

10. lwipパッチ適用
以下コマンドでlwipパッチを適用します。

$ cd $(WORK)/iotjs/src/platform/mbedos5/mbed-os
$ git apply lwip_improve.patch

11. ESP32 TRNG対応パッチ適用
以下コマンドでESP32のTRNGを活用するためのパッチを適用します。

$ cd $(WORK)/iotjs/src/platform/mbedos5/mbed-os
$ git apply trng_support.patch

12. Mbed OS版iotjs環境のビルド
下記コマンドを実行してMbed OS版iotjs環境をビルドします。
(リリースビルドの場合)

$ cd $(WORK)/iotjs/src/platform/mbedos5
$ make clean; make DEBUG=0

(デバッグビルドの場合)

$ cd $(WORK)/iotjs/src/platform/mbedos5
$ make clean; make DEBUG=1

13. ビルドが正常に終了すると、以下の通りバイナリが生成されます。
(リリースビルドの場合)

$ ls -l ${WORK}/iotjs/src/platform/mbedos5/BUILD/RZ_A1H/GCC_ARM-RELEASE/iotjs.bin

(デバッグビルドの場合)

$ ls -l ${WORK}/iotjs/src/platform/mbedos5/BUILD/RZ_A1H/GCC_ARM-DEBUG/iotjs.bin

実行方法

1. GR-PEACHにmicro SDカードを挿入します。

2. GR-PEACHのEthernetポートから遠い側のUSBポートとHost PCをマイクロUSBケーブルで接続します。

3. Host PCでGR-PEACHが『mbed:』ドライブとして認識されたら、iotjs.binをmbedドライブにコピーします。

4. ターミナルS/Wを立上げ、『mbed Serial Port』と接続します。
/media/uploads/HinoNaka/img1.jpg
シリアルポートは下記設定としてください。

Baud rate115200
Data8 bit
Paritynone
Stop1 bit
Flow controlnone

5. 正常に書込みが終了したらGR-PEACHのRESETボタンを押下します。

6. ターミナルS/W上に下記メッセージが表示されます。
/media/uploads/HinoNaka/img2.jpg

7. Enterキーを押下してコード入力モードに移行します。
/media/uploads/HinoNaka/img3.jpg

8. 実行するJavascriptコードをターミナルソフトウェアに貼り付けてEnterキーを押下すると、実行開始します。Javascriptコード例については、test/case.txtを参照ください。

Committer:
Osamu Nakamura
Date:
Thu Jul 18 10:43:16 2019 +0900
Revision:
4:52c937978bb3
Parent:
1:c3d69f309845
Remove unnecessary documents

Who changed what in which revision?

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Osamu Nakamura 1:c3d69f309845 144 fill: currentColor;
Osamu Nakamura 1:c3d69f309845 145 }
Osamu Nakamura 1:c3d69f309845 146
Osamu Nakamura 1:c3d69f309845 147 .markdown-body a {
Osamu Nakamura 1:c3d69f309845 148 background-color: transparent;
Osamu Nakamura 1:c3d69f309845 149 }
Osamu Nakamura 1:c3d69f309845 150
Osamu Nakamura 1:c3d69f309845 151 .markdown-body a:active,
Osamu Nakamura 1:c3d69f309845 152 .markdown-body a:hover {
Osamu Nakamura 1:c3d69f309845 153 outline-width: 0;
Osamu Nakamura 1:c3d69f309845 154 }
Osamu Nakamura 1:c3d69f309845 155
Osamu Nakamura 1:c3d69f309845 156 .markdown-body strong {
Osamu Nakamura 1:c3d69f309845 157 font-weight: inherit;
Osamu Nakamura 1:c3d69f309845 158 }
Osamu Nakamura 1:c3d69f309845 159
Osamu Nakamura 1:c3d69f309845 160 .markdown-body strong {
Osamu Nakamura 1:c3d69f309845 161 font-weight: bolder;
Osamu Nakamura 1:c3d69f309845 162 }
Osamu Nakamura 1:c3d69f309845 163
Osamu Nakamura 1:c3d69f309845 164 .markdown-body h1 {
Osamu Nakamura 1:c3d69f309845 165 font-size: 2em;
Osamu Nakamura 1:c3d69f309845 166 margin: 0.67em 0;
Osamu Nakamura 1:c3d69f309845 167 }
Osamu Nakamura 1:c3d69f309845 168
Osamu Nakamura 1:c3d69f309845 169 .markdown-body img {
Osamu Nakamura 1:c3d69f309845 170 border-style: none;
Osamu Nakamura 1:c3d69f309845 171 }
Osamu Nakamura 1:c3d69f309845 172
Osamu Nakamura 1:c3d69f309845 173 .markdown-body code,
Osamu Nakamura 1:c3d69f309845 174 .markdown-body kbd,
Osamu Nakamura 1:c3d69f309845 175 .markdown-body pre {
Osamu Nakamura 1:c3d69f309845 176 font-family: monospace, monospace;
Osamu Nakamura 1:c3d69f309845 177 font-size: 1em;
Osamu Nakamura 1:c3d69f309845 178 }
Osamu Nakamura 1:c3d69f309845 179
Osamu Nakamura 1:c3d69f309845 180 .markdown-body hr {
Osamu Nakamura 1:c3d69f309845 181 box-sizing: content-box;
Osamu Nakamura 1:c3d69f309845 182 height: 0;
Osamu Nakamura 1:c3d69f309845 183 overflow: visible;
Osamu Nakamura 1:c3d69f309845 184 }
Osamu Nakamura 1:c3d69f309845 185
Osamu Nakamura 1:c3d69f309845 186 .markdown-body input {
Osamu Nakamura 1:c3d69f309845 187 font: inherit;
Osamu Nakamura 1:c3d69f309845 188 margin: 0;
Osamu Nakamura 1:c3d69f309845 189 }
Osamu Nakamura 1:c3d69f309845 190
Osamu Nakamura 1:c3d69f309845 191 .markdown-body input {
Osamu Nakamura 1:c3d69f309845 192 overflow: visible;
Osamu Nakamura 1:c3d69f309845 193 }
Osamu Nakamura 1:c3d69f309845 194
Osamu Nakamura 1:c3d69f309845 195 .markdown-body [type="checkbox"] {
Osamu Nakamura 1:c3d69f309845 196 box-sizing: border-box;
Osamu Nakamura 1:c3d69f309845 197 padding: 0;
Osamu Nakamura 1:c3d69f309845 198 }
Osamu Nakamura 1:c3d69f309845 199
Osamu Nakamura 1:c3d69f309845 200 .markdown-body * {
Osamu Nakamura 1:c3d69f309845 201 box-sizing: border-box;
Osamu Nakamura 1:c3d69f309845 202 }
Osamu Nakamura 1:c3d69f309845 203
Osamu Nakamura 1:c3d69f309845 204 .markdown-body input {
Osamu Nakamura 1:c3d69f309845 205 font-family: inherit;
Osamu Nakamura 1:c3d69f309845 206 font-size: inherit;
Osamu Nakamura 1:c3d69f309845 207 line-height: inherit;
Osamu Nakamura 1:c3d69f309845 208 }
Osamu Nakamura 1:c3d69f309845 209
Osamu Nakamura 1:c3d69f309845 210 .markdown-body a {
Osamu Nakamura 1:c3d69f309845 211 color: #0366d6;
Osamu Nakamura 1:c3d69f309845 212 text-decoration: none;
Osamu Nakamura 1:c3d69f309845 213 }
Osamu Nakamura 1:c3d69f309845 214
Osamu Nakamura 1:c3d69f309845 215 .markdown-body a:hover {
Osamu Nakamura 1:c3d69f309845 216 text-decoration: underline;
Osamu Nakamura 1:c3d69f309845 217 }
Osamu Nakamura 1:c3d69f309845 218
Osamu Nakamura 1:c3d69f309845 219 .markdown-body strong {
Osamu Nakamura 1:c3d69f309845 220 font-weight: 600;
Osamu Nakamura 1:c3d69f309845 221 }
Osamu Nakamura 1:c3d69f309845 222
Osamu Nakamura 1:c3d69f309845 223 .markdown-body hr {
Osamu Nakamura 1:c3d69f309845 224 height: 0;
Osamu Nakamura 1:c3d69f309845 225 margin: 15px 0;
Osamu Nakamura 1:c3d69f309845 226 overflow: hidden;
Osamu Nakamura 1:c3d69f309845 227 background: transparent;
Osamu Nakamura 1:c3d69f309845 228 border: 0;
Osamu Nakamura 1:c3d69f309845 229 border-bottom: 1px solid #dfe2e5;
Osamu Nakamura 1:c3d69f309845 230 }
Osamu Nakamura 1:c3d69f309845 231
Osamu Nakamura 1:c3d69f309845 232 .markdown-body hr::before {
Osamu Nakamura 1:c3d69f309845 233 display: table;
Osamu Nakamura 1:c3d69f309845 234 content: "";
Osamu Nakamura 1:c3d69f309845 235 }
Osamu Nakamura 1:c3d69f309845 236
Osamu Nakamura 1:c3d69f309845 237 .markdown-body hr::after {
Osamu Nakamura 1:c3d69f309845 238 display: table;
Osamu Nakamura 1:c3d69f309845 239 clear: both;
Osamu Nakamura 1:c3d69f309845 240 content: "";
Osamu Nakamura 1:c3d69f309845 241 }
Osamu Nakamura 1:c3d69f309845 242
Osamu Nakamura 1:c3d69f309845 243 .markdown-body table {
Osamu Nakamura 1:c3d69f309845 244 border-spacing: 0;
Osamu Nakamura 1:c3d69f309845 245 border-collapse: collapse;
Osamu Nakamura 1:c3d69f309845 246 }
Osamu Nakamura 1:c3d69f309845 247
Osamu Nakamura 1:c3d69f309845 248 .markdown-body td,
Osamu Nakamura 1:c3d69f309845 249 .markdown-body th {
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Osamu Nakamura 1:c3d69f309845 251 }
Osamu Nakamura 1:c3d69f309845 252
Osamu Nakamura 1:c3d69f309845 253 .markdown-body h1,
Osamu Nakamura 1:c3d69f309845 254 .markdown-body h2,
Osamu Nakamura 1:c3d69f309845 255 .markdown-body h3,
Osamu Nakamura 1:c3d69f309845 256 .markdown-body h4,
Osamu Nakamura 1:c3d69f309845 257 .markdown-body h5,
Osamu Nakamura 1:c3d69f309845 258 .markdown-body h6 {
Osamu Nakamura 1:c3d69f309845 259 margin-top: 0;
Osamu Nakamura 1:c3d69f309845 260 margin-bottom: 0;
Osamu Nakamura 1:c3d69f309845 261 }
Osamu Nakamura 1:c3d69f309845 262
Osamu Nakamura 1:c3d69f309845 263 .markdown-body h1 {
Osamu Nakamura 1:c3d69f309845 264 font-size: 32px;
Osamu Nakamura 1:c3d69f309845 265 font-weight: 600;
Osamu Nakamura 1:c3d69f309845 266 }
Osamu Nakamura 1:c3d69f309845 267
Osamu Nakamura 1:c3d69f309845 268 .markdown-body h2 {
Osamu Nakamura 1:c3d69f309845 269 font-size: 24px;
Osamu Nakamura 1:c3d69f309845 270 font-weight: 600;
Osamu Nakamura 1:c3d69f309845 271 }
Osamu Nakamura 1:c3d69f309845 272
Osamu Nakamura 1:c3d69f309845 273 .markdown-body h3 {
Osamu Nakamura 1:c3d69f309845 274 font-size: 20px;
Osamu Nakamura 1:c3d69f309845 275 font-weight: 600;
Osamu Nakamura 1:c3d69f309845 276 }
Osamu Nakamura 1:c3d69f309845 277
Osamu Nakamura 1:c3d69f309845 278 .markdown-body h4 {
Osamu Nakamura 1:c3d69f309845 279 font-size: 16px;
Osamu Nakamura 1:c3d69f309845 280 font-weight: 600;
Osamu Nakamura 1:c3d69f309845 281 }
Osamu Nakamura 1:c3d69f309845 282
Osamu Nakamura 1:c3d69f309845 283 .markdown-body h5 {
Osamu Nakamura 1:c3d69f309845 284 font-size: 14px;
Osamu Nakamura 1:c3d69f309845 285 font-weight: 600;
Osamu Nakamura 1:c3d69f309845 286 }
Osamu Nakamura 1:c3d69f309845 287
Osamu Nakamura 1:c3d69f309845 288 .markdown-body h6 {
Osamu Nakamura 1:c3d69f309845 289 font-size: 12px;
Osamu Nakamura 1:c3d69f309845 290 font-weight: 600;
Osamu Nakamura 1:c3d69f309845 291 }
Osamu Nakamura 1:c3d69f309845 292
Osamu Nakamura 1:c3d69f309845 293 .markdown-body p {
Osamu Nakamura 1:c3d69f309845 294 margin-top: 0;
Osamu Nakamura 1:c3d69f309845 295 margin-bottom: 10px;
Osamu Nakamura 1:c3d69f309845 296 }
Osamu Nakamura 1:c3d69f309845 297
Osamu Nakamura 1:c3d69f309845 298 .markdown-body blockquote {
Osamu Nakamura 1:c3d69f309845 299 margin: 0;
Osamu Nakamura 1:c3d69f309845 300 }
Osamu Nakamura 1:c3d69f309845 301
Osamu Nakamura 1:c3d69f309845 302 .markdown-body ul,
Osamu Nakamura 1:c3d69f309845 303 .markdown-body ol {
Osamu Nakamura 1:c3d69f309845 304 padding-left: 0;
Osamu Nakamura 1:c3d69f309845 305 margin-top: 0;
Osamu Nakamura 1:c3d69f309845 306 margin-bottom: 0;
Osamu Nakamura 1:c3d69f309845 307 }
Osamu Nakamura 1:c3d69f309845 308
Osamu Nakamura 1:c3d69f309845 309 .markdown-body ol ol,
Osamu Nakamura 1:c3d69f309845 310 .markdown-body ul ol {
Osamu Nakamura 1:c3d69f309845 311 list-style-type: lower-roman;
Osamu Nakamura 1:c3d69f309845 312 }
Osamu Nakamura 1:c3d69f309845 313
Osamu Nakamura 1:c3d69f309845 314 .markdown-body ul ul ol,
Osamu Nakamura 1:c3d69f309845 315 .markdown-body ul ol ol,
Osamu Nakamura 1:c3d69f309845 316 .markdown-body ol ul ol,
Osamu Nakamura 1:c3d69f309845 317 .markdown-body ol ol ol {
Osamu Nakamura 1:c3d69f309845 318 list-style-type: lower-alpha;
Osamu Nakamura 1:c3d69f309845 319 }
Osamu Nakamura 1:c3d69f309845 320
Osamu Nakamura 1:c3d69f309845 321 .markdown-body dd {
Osamu Nakamura 1:c3d69f309845 322 margin-left: 0;
Osamu Nakamura 1:c3d69f309845 323 }
Osamu Nakamura 1:c3d69f309845 324
Osamu Nakamura 1:c3d69f309845 325 .markdown-body code {
Osamu Nakamura 1:c3d69f309845 326 font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
Osamu Nakamura 1:c3d69f309845 327 font-size: 12px;
Osamu Nakamura 1:c3d69f309845 328 }
Osamu Nakamura 1:c3d69f309845 329
Osamu Nakamura 1:c3d69f309845 330 .markdown-body pre {
Osamu Nakamura 1:c3d69f309845 331 margin-top: 0;
Osamu Nakamura 1:c3d69f309845 332 margin-bottom: 0;
Osamu Nakamura 1:c3d69f309845 333 font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
Osamu Nakamura 1:c3d69f309845 334 font-size: 12px;
Osamu Nakamura 1:c3d69f309845 335 }
Osamu Nakamura 1:c3d69f309845 336
Osamu Nakamura 1:c3d69f309845 337 .markdown-body .octicon {
Osamu Nakamura 1:c3d69f309845 338 vertical-align: text-bottom;
Osamu Nakamura 1:c3d69f309845 339 }
Osamu Nakamura 1:c3d69f309845 340
Osamu Nakamura 1:c3d69f309845 341 .markdown-body .pl-0 {
Osamu Nakamura 1:c3d69f309845 342 padding-left: 0 !important;
Osamu Nakamura 1:c3d69f309845 343 }
Osamu Nakamura 1:c3d69f309845 344
Osamu Nakamura 1:c3d69f309845 345 .markdown-body .pl-1 {
Osamu Nakamura 1:c3d69f309845 346 padding-left: 4px !important;
Osamu Nakamura 1:c3d69f309845 347 }
Osamu Nakamura 1:c3d69f309845 348
Osamu Nakamura 1:c3d69f309845 349 .markdown-body .pl-2 {
Osamu Nakamura 1:c3d69f309845 350 padding-left: 8px !important;
Osamu Nakamura 1:c3d69f309845 351 }
Osamu Nakamura 1:c3d69f309845 352
Osamu Nakamura 1:c3d69f309845 353 .markdown-body .pl-3 {
Osamu Nakamura 1:c3d69f309845 354 padding-left: 16px !important;
Osamu Nakamura 1:c3d69f309845 355 }
Osamu Nakamura 1:c3d69f309845 356
Osamu Nakamura 1:c3d69f309845 357 .markdown-body .pl-4 {
Osamu Nakamura 1:c3d69f309845 358 padding-left: 24px !important;
Osamu Nakamura 1:c3d69f309845 359 }
Osamu Nakamura 1:c3d69f309845 360
Osamu Nakamura 1:c3d69f309845 361 .markdown-body .pl-5 {
Osamu Nakamura 1:c3d69f309845 362 padding-left: 32px !important;
Osamu Nakamura 1:c3d69f309845 363 }
Osamu Nakamura 1:c3d69f309845 364
Osamu Nakamura 1:c3d69f309845 365 .markdown-body .pl-6 {
Osamu Nakamura 1:c3d69f309845 366 padding-left: 40px !important;
Osamu Nakamura 1:c3d69f309845 367 }
Osamu Nakamura 1:c3d69f309845 368
Osamu Nakamura 1:c3d69f309845 369 .markdown-body::before {
Osamu Nakamura 1:c3d69f309845 370 display: table;
Osamu Nakamura 1:c3d69f309845 371 content: "";
Osamu Nakamura 1:c3d69f309845 372 }
Osamu Nakamura 1:c3d69f309845 373
Osamu Nakamura 1:c3d69f309845 374 .markdown-body::after {
Osamu Nakamura 1:c3d69f309845 375 display: table;
Osamu Nakamura 1:c3d69f309845 376 clear: both;
Osamu Nakamura 1:c3d69f309845 377 content: "";
Osamu Nakamura 1:c3d69f309845 378 }
Osamu Nakamura 1:c3d69f309845 379
Osamu Nakamura 1:c3d69f309845 380 .markdown-body>*:first-child {
Osamu Nakamura 1:c3d69f309845 381 margin-top: 0 !important;
Osamu Nakamura 1:c3d69f309845 382 }
Osamu Nakamura 1:c3d69f309845 383
Osamu Nakamura 1:c3d69f309845 384 .markdown-body>*:last-child {
Osamu Nakamura 1:c3d69f309845 385 margin-bottom: 0 !important;
Osamu Nakamura 1:c3d69f309845 386 }
Osamu Nakamura 1:c3d69f309845 387
Osamu Nakamura 1:c3d69f309845 388 .markdown-body a:not([href]) {
Osamu Nakamura 1:c3d69f309845 389 color: inherit;
Osamu Nakamura 1:c3d69f309845 390 text-decoration: none;
Osamu Nakamura 1:c3d69f309845 391 }
Osamu Nakamura 1:c3d69f309845 392
Osamu Nakamura 1:c3d69f309845 393 .markdown-body .anchor {
Osamu Nakamura 1:c3d69f309845 394 float: left;
Osamu Nakamura 1:c3d69f309845 395 padding-right: 4px;
Osamu Nakamura 1:c3d69f309845 396 margin-left: -20px;
Osamu Nakamura 1:c3d69f309845 397 line-height: 1;
Osamu Nakamura 1:c3d69f309845 398 }
Osamu Nakamura 1:c3d69f309845 399
Osamu Nakamura 1:c3d69f309845 400 .markdown-body .anchor:focus {
Osamu Nakamura 1:c3d69f309845 401 outline: none;
Osamu Nakamura 1:c3d69f309845 402 }
Osamu Nakamura 1:c3d69f309845 403
Osamu Nakamura 1:c3d69f309845 404 .markdown-body p,
Osamu Nakamura 1:c3d69f309845 405 .markdown-body blockquote,
Osamu Nakamura 1:c3d69f309845 406 .markdown-body ul,
Osamu Nakamura 1:c3d69f309845 407 .markdown-body ol,
Osamu Nakamura 1:c3d69f309845 408 .markdown-body dl,
Osamu Nakamura 1:c3d69f309845 409 .markdown-body table,
Osamu Nakamura 1:c3d69f309845 410 .markdown-body pre {
Osamu Nakamura 1:c3d69f309845 411 margin-top: 0;
Osamu Nakamura 1:c3d69f309845 412 margin-bottom: 16px;
Osamu Nakamura 1:c3d69f309845 413 }
Osamu Nakamura 1:c3d69f309845 414
Osamu Nakamura 1:c3d69f309845 415 .markdown-body hr {
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Osamu Nakamura 1:c3d69f309845 417 padding: 0;
Osamu Nakamura 1:c3d69f309845 418 margin: 24px 0;
Osamu Nakamura 1:c3d69f309845 419 background-color: #e1e4e8;
Osamu Nakamura 1:c3d69f309845 420 border: 0;
Osamu Nakamura 1:c3d69f309845 421 }
Osamu Nakamura 1:c3d69f309845 422
Osamu Nakamura 1:c3d69f309845 423 .markdown-body blockquote {
Osamu Nakamura 1:c3d69f309845 424 padding: 0 1em;
Osamu Nakamura 1:c3d69f309845 425 color: #6a737d;
Osamu Nakamura 1:c3d69f309845 426 border-left: 0.25em solid #dfe2e5;
Osamu Nakamura 1:c3d69f309845 427 }
Osamu Nakamura 1:c3d69f309845 428
Osamu Nakamura 1:c3d69f309845 429 .markdown-body blockquote>:first-child {
Osamu Nakamura 1:c3d69f309845 430 margin-top: 0;
Osamu Nakamura 1:c3d69f309845 431 }
Osamu Nakamura 1:c3d69f309845 432
Osamu Nakamura 1:c3d69f309845 433 .markdown-body blockquote>:last-child {
Osamu Nakamura 1:c3d69f309845 434 margin-bottom: 0;
Osamu Nakamura 1:c3d69f309845 435 }
Osamu Nakamura 1:c3d69f309845 436
Osamu Nakamura 1:c3d69f309845 437 .markdown-body kbd {
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Osamu Nakamura 1:c3d69f309845 439 padding: 3px 5px;
Osamu Nakamura 1:c3d69f309845 440 font-size: 11px;
Osamu Nakamura 1:c3d69f309845 441 line-height: 10px;
Osamu Nakamura 1:c3d69f309845 442 color: #444d56;
Osamu Nakamura 1:c3d69f309845 443 vertical-align: middle;
Osamu Nakamura 1:c3d69f309845 444 background-color: #fafbfc;
Osamu Nakamura 1:c3d69f309845 445 border: solid 1px #c6cbd1;
Osamu Nakamura 1:c3d69f309845 446 border-bottom-color: #959da5;
Osamu Nakamura 1:c3d69f309845 447 border-radius: 3px;
Osamu Nakamura 1:c3d69f309845 448 box-shadow: inset 0 -1px 0 #959da5;
Osamu Nakamura 1:c3d69f309845 449 }
Osamu Nakamura 1:c3d69f309845 450
Osamu Nakamura 1:c3d69f309845 451 .markdown-body h1,
Osamu Nakamura 1:c3d69f309845 452 .markdown-body h2,
Osamu Nakamura 1:c3d69f309845 453 .markdown-body h3,
Osamu Nakamura 1:c3d69f309845 454 .markdown-body h4,
Osamu Nakamura 1:c3d69f309845 455 .markdown-body h5,
Osamu Nakamura 1:c3d69f309845 456 .markdown-body h6 {
Osamu Nakamura 1:c3d69f309845 457 margin-top: 24px;
Osamu Nakamura 1:c3d69f309845 458 margin-bottom: 16px;
Osamu Nakamura 1:c3d69f309845 459 font-weight: 600;
Osamu Nakamura 1:c3d69f309845 460 line-height: 1.25;
Osamu Nakamura 1:c3d69f309845 461 }
Osamu Nakamura 1:c3d69f309845 462
Osamu Nakamura 1:c3d69f309845 463 .markdown-body h1 .octicon-link,
Osamu Nakamura 1:c3d69f309845 464 .markdown-body h2 .octicon-link,
Osamu Nakamura 1:c3d69f309845 465 .markdown-body h3 .octicon-link,
Osamu Nakamura 1:c3d69f309845 466 .markdown-body h4 .octicon-link,
Osamu Nakamura 1:c3d69f309845 467 .markdown-body h5 .octicon-link,
Osamu Nakamura 1:c3d69f309845 468 .markdown-body h6 .octicon-link {
Osamu Nakamura 1:c3d69f309845 469 color: #1b1f23;
Osamu Nakamura 1:c3d69f309845 470 vertical-align: middle;
Osamu Nakamura 1:c3d69f309845 471 visibility: hidden;
Osamu Nakamura 1:c3d69f309845 472 }
Osamu Nakamura 1:c3d69f309845 473
Osamu Nakamura 1:c3d69f309845 474 .markdown-body h1:hover .anchor,
Osamu Nakamura 1:c3d69f309845 475 .markdown-body h2:hover .anchor,
Osamu Nakamura 1:c3d69f309845 476 .markdown-body h3:hover .anchor,
Osamu Nakamura 1:c3d69f309845 477 .markdown-body h4:hover .anchor,
Osamu Nakamura 1:c3d69f309845 478 .markdown-body h5:hover .anchor,
Osamu Nakamura 1:c3d69f309845 479 .markdown-body h6:hover .anchor {
Osamu Nakamura 1:c3d69f309845 480 text-decoration: none;
Osamu Nakamura 1:c3d69f309845 481 }
Osamu Nakamura 1:c3d69f309845 482
Osamu Nakamura 1:c3d69f309845 483 .markdown-body h1:hover .anchor .octicon-link,
Osamu Nakamura 1:c3d69f309845 484 .markdown-body h2:hover .anchor .octicon-link,
Osamu Nakamura 1:c3d69f309845 485 .markdown-body h3:hover .anchor .octicon-link,
Osamu Nakamura 1:c3d69f309845 486 .markdown-body h4:hover .anchor .octicon-link,
Osamu Nakamura 1:c3d69f309845 487 .markdown-body h5:hover .anchor .octicon-link,
Osamu Nakamura 1:c3d69f309845 488 .markdown-body h6:hover .anchor .octicon-link {
Osamu Nakamura 1:c3d69f309845 489 visibility: visible;
Osamu Nakamura 1:c3d69f309845 490 }
Osamu Nakamura 1:c3d69f309845 491
Osamu Nakamura 1:c3d69f309845 492 .markdown-body h1 {
Osamu Nakamura 1:c3d69f309845 493 padding-bottom: 0.3em;
Osamu Nakamura 1:c3d69f309845 494 font-size: 2em;
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Osamu Nakamura 1:c3d69f309845 798 </style></head><body class="markdown-body"><h1 id="gr-peach-jpeg-jpeg-">GR-PEACH JPEGモジュール (jpeg)</h1>
Osamu Nakamura 1:c3d69f309845 799 <p><code>jpeg</code> モジュールは、GR-PEACHマイコンに搭載されたJPEGコーデックを用いてJPEG画像のエンコード・デコードを行います。</p>
Osamu Nakamura 1:c3d69f309845 800 <h2 id="jpeg-encode-image-callback-">jpeg.encode(image, callback)</h2>
Osamu Nakamura 1:c3d69f309845 801 <ul>
Osamu Nakamura 1:c3d69f309845 802 <li><code>image</code> {Object} エンコードする画像<ul>
Osamu Nakamura 1:c3d69f309845 803 <li><code>width</code> {number} 画像の幅(ピクセル数)。必須項目です。この値は偶数でなければなりません。</li>
Osamu Nakamura 1:c3d69f309845 804 <li><code>height</code> {number} 画像の高さ(ピクセル数)。必須項目です。</li>
Osamu Nakamura 1:c3d69f309845 805 <li><code>format</code> {string} 画像のピクセルフォーマット。<code>&quot;ycbcr422&quot;</code>のみが指定可能です。必須項目です。</li>
Osamu Nakamura 1:c3d69f309845 806 <li><code>bitmap</code> {AlignedBuffer} 画素データ。必須項目です。32バイトのアライメントである必要があります。</li>
Osamu Nakamura 1:c3d69f309845 807 </ul>
Osamu Nakamura 1:c3d69f309845 808 </li>
Osamu Nakamura 1:c3d69f309845 809 <li><code>callback</code> {Function} コールバック関数<ul>
Osamu Nakamura 1:c3d69f309845 810 <li><code>err</code> {Error|null} エラーオブジェクト(失敗のとき) または <code>null</code>(成功のとき)。</li>
Osamu Nakamura 1:c3d69f309845 811 <li><code>jpegData</code> {AlignedBuffer} JPEGデータを格納したバッファ。32バイトのアライメントです。</li>
Osamu Nakamura 1:c3d69f309845 812 </ul>
Osamu Nakamura 1:c3d69f309845 813 </li>
Osamu Nakamura 1:c3d69f309845 814 <li>戻り値: {undefined}</li>
Osamu Nakamura 1:c3d69f309845 815 </ul>
Osamu Nakamura 1:c3d69f309845 816 <p>ビットマップ画像をJPEG画像に変換します。処理は非同期で行われ、処理が完了または失敗すると、コールバック関数が呼び出されます。</p>
Osamu Nakamura 1:c3d69f309845 817 <!--
Osamu Nakamura 1:c3d69f309845 818 * C++ライブラリ側API
Osamu Nakamura 1:c3d69f309845 819 * JPEG_Converter::encode
Osamu Nakamura 1:c3d69f309845 820 -->
Osamu Nakamura 1:c3d69f309845 821 <h4 id="-">使用例</h4>
Osamu Nakamura 1:c3d69f309845 822 <pre><code class="lang-javascript"><span class="hljs-keyword">var</span> jpeg = <span class="hljs-built_in">require</span>(<span class="hljs-string">'jpeg'</span>);
Osamu Nakamura 1:c3d69f309845 823 <span class="hljs-keyword">var</span> fs = <span class="hljs-built_in">require</span>(<span class="hljs-string">'fs'</span>);
Osamu Nakamura 1:c3d69f309845 824 <span class="hljs-keyword">var</span> AlignedBuffer = <span class="hljs-built_in">require</span>(<span class="hljs-string">'aligned_buffer'</span>).AlignedBuffer;
Osamu Nakamura 1:c3d69f309845 825
Osamu Nakamura 1:c3d69f309845 826 <span class="hljs-keyword">var</span> bitmap = <span class="hljs-keyword">new</span> AlignedBuffer(<span class="hljs-number">480</span> * <span class="hljs-number">272</span> * <span class="hljs-number">2</span>, <span class="hljs-number">32</span>);
Osamu Nakamura 1:c3d69f309845 827 <span class="hljs-comment">/* bitmap に画像データを格納する... */</span>
Osamu Nakamura 1:c3d69f309845 828 <span class="hljs-keyword">var</span> image = {
Osamu Nakamura 1:c3d69f309845 829 <span class="hljs-attr">width</span>: <span class="hljs-number">480</span>,
Osamu Nakamura 1:c3d69f309845 830 <span class="hljs-attr">height</span>: <span class="hljs-number">272</span>,
Osamu Nakamura 1:c3d69f309845 831 <span class="hljs-attr">format</span>: <span class="hljs-string">'ycbcr422'</span>,
Osamu Nakamura 1:c3d69f309845 832 <span class="hljs-attr">bitmap</span>: bitmap
Osamu Nakamura 1:c3d69f309845 833 };
Osamu Nakamura 1:c3d69f309845 834 jpeg.encode(image, <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params">err, jpegData</span>) </span>{
Osamu Nakamura 1:c3d69f309845 835 <span class="hljs-keyword">if</span> (err) {
Osamu Nakamura 1:c3d69f309845 836 <span class="hljs-built_in">console</span>.log(err);
Osamu Nakamura 1:c3d69f309845 837 <span class="hljs-keyword">return</span>;
Osamu Nakamura 1:c3d69f309845 838 }
Osamu Nakamura 1:c3d69f309845 839 <span class="hljs-comment">/* ファイルに保存する */</span>
Osamu Nakamura 1:c3d69f309845 840 fs.writeFile(<span class="hljs-string">'/sd/output.jpg'</span>, jpegData.toBuffer(), <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params">err</span>) </span>{
Osamu Nakamura 1:c3d69f309845 841 });
Osamu Nakamura 1:c3d69f309845 842 });
Osamu Nakamura 1:c3d69f309845 843 </code></pre>
Osamu Nakamura 1:c3d69f309845 844 <h2 id="jpeg-encodesync-image-">jpeg.encodeSync(image)</h2>
Osamu Nakamura 1:c3d69f309845 845 <ul>
Osamu Nakamura 1:c3d69f309845 846 <li><code>image</code> {Object} エンコードするビットマップ画像<ul>
Osamu Nakamura 1:c3d69f309845 847 <li><code>jpeg.encode()</code>の説明を参照</li>
Osamu Nakamura 1:c3d69f309845 848 </ul>
Osamu Nakamura 1:c3d69f309845 849 </li>
Osamu Nakamura 1:c3d69f309845 850 <li>戻り値: {AlignedBuffer} JPEGデータを格納したバッファ。32バイトのアライメントです。</li>
Osamu Nakamura 1:c3d69f309845 851 </ul>
Osamu Nakamura 1:c3d69f309845 852 <p><code>jpeg.encode()</code>の同期版です。処理は同期で行われ、処理が完了するとJPEGデータを格納したバッファを返却します。失敗すると例外をスローします。</p>
Osamu Nakamura 1:c3d69f309845 853 <h4 id="-">使用例</h4>
Osamu Nakamura 1:c3d69f309845 854 <pre><code class="lang-javascript"><span class="hljs-keyword">var</span> jpeg = <span class="hljs-built_in">require</span>(<span class="hljs-string">'jpeg'</span>);
Osamu Nakamura 1:c3d69f309845 855 <span class="hljs-keyword">var</span> fs = <span class="hljs-built_in">require</span>(<span class="hljs-string">'fs'</span>);
Osamu Nakamura 1:c3d69f309845 856 <span class="hljs-keyword">var</span> AlignedBuffer = <span class="hljs-built_in">require</span>(<span class="hljs-string">'aligned_buffer'</span>).AlignedBuffer;
Osamu Nakamura 1:c3d69f309845 857
Osamu Nakamura 1:c3d69f309845 858 <span class="hljs-keyword">var</span> bitmap = <span class="hljs-keyword">new</span> AlignedBuffer(<span class="hljs-number">480</span> * <span class="hljs-number">272</span> * <span class="hljs-number">2</span>, <span class="hljs-number">32</span>);
Osamu Nakamura 1:c3d69f309845 859 <span class="hljs-comment">/* bitmap に画像データを格納する... */</span>
Osamu Nakamura 1:c3d69f309845 860 <span class="hljs-keyword">var</span> image = {
Osamu Nakamura 1:c3d69f309845 861 <span class="hljs-attr">width</span>: <span class="hljs-number">480</span>,
Osamu Nakamura 1:c3d69f309845 862 <span class="hljs-attr">height</span>: <span class="hljs-number">272</span>,
Osamu Nakamura 1:c3d69f309845 863 <span class="hljs-attr">format</span>: <span class="hljs-string">'ycbcr422'</span>,
Osamu Nakamura 1:c3d69f309845 864 <span class="hljs-attr">bitmap</span>: bitmap
Osamu Nakamura 1:c3d69f309845 865 };
Osamu Nakamura 1:c3d69f309845 866 <span class="hljs-keyword">try</span> {
Osamu Nakamura 1:c3d69f309845 867 <span class="hljs-keyword">var</span> jpegData = jpeg.encodeSync(image);
Osamu Nakamura 1:c3d69f309845 868 <span class="hljs-comment">/* ファイルに保存する */</span>
Osamu Nakamura 1:c3d69f309845 869 fs.writeFileSync(<span class="hljs-string">'/sd/output.jpg'</span>, jpegData.toBuffer());
Osamu Nakamura 1:c3d69f309845 870 } <span class="hljs-keyword">catch</span> (err) {
Osamu Nakamura 1:c3d69f309845 871 <span class="hljs-built_in">console</span>.log(err);
Osamu Nakamura 1:c3d69f309845 872 }
Osamu Nakamura 1:c3d69f309845 873 </code></pre>
Osamu Nakamura 1:c3d69f309845 874 <h2 id="jpeg-decode-jpegdata-config-callback-">jpeg.decode(jpegData, config, callback)</h2>
Osamu Nakamura 1:c3d69f309845 875 <ul>
Osamu Nakamura 1:c3d69f309845 876 <li><code>jpegData</code> {AlignedBuffer} JPEGデータを格納したバッファ。32バイトのアライメントである必要があります。</li>
Osamu Nakamura 1:c3d69f309845 877 <li><code>config</code> {Object} デコード設定。<ul>
Osamu Nakamura 1:c3d69f309845 878 <li><code>width</code> {number} 出力するビットマップの幅(ピクセル数)。この値は偶数でなければなりません。</li>
Osamu Nakamura 1:c3d69f309845 879 <li><code>height</code> {number} 出力するビットマップの高さ(ピクセル数)。</li>
Osamu Nakamura 1:c3d69f309845 880 <li><code>format</code> {string} 出力するビットマップのピクセルフォーマット。<code>&quot;ycbcr422&quot;</code>,<code>&quot;rgb565&quot;</code>,<code>&quot;argb8888&quot;</code>のいずれか。</li>
Osamu Nakamura 1:c3d69f309845 881 <li><code>alpha</code> {number} ピクセルフォーマットが<code>&quot;argb8888&quot;</code>のときの透過度。<code>0</code>~<code>255</code>の値。(省略時: <code>255</code>)</li>
Osamu Nakamura 1:c3d69f309845 882 </ul>
Osamu Nakamura 1:c3d69f309845 883 </li>
Osamu Nakamura 1:c3d69f309845 884 <li><code>callback</code> {Function} コールバック関数<ul>
Osamu Nakamura 1:c3d69f309845 885 <li><code>err</code> {Error|null} エラーオブジェクト(失敗のとき) または <code>null</code>(成功のとき)。</li>
Osamu Nakamura 1:c3d69f309845 886 <li><code>image</code> {Object} デコードされたビットマップ画像<ul>
Osamu Nakamura 1:c3d69f309845 887 <li><code>width</code> {number} 画像の幅(ピクセル数)。</li>
Osamu Nakamura 1:c3d69f309845 888 <li><code>height</code> {number} 画像の高さ(ピクセル数)。</li>
Osamu Nakamura 1:c3d69f309845 889 <li><code>format</code> {string} 画像のピクセルフォーマット。<code>&quot;ycbcr422&quot;</code>,<code>&quot;rgb565&quot;</code>,<code>&quot;argb8888&quot;</code>のいずれか。</li>
Osamu Nakamura 1:c3d69f309845 890 <li><code>bitmap</code> {AlignedBuffer} 画素データ。32バイトのアライメントです。</li>
Osamu Nakamura 1:c3d69f309845 891 </ul>
Osamu Nakamura 1:c3d69f309845 892 </li>
Osamu Nakamura 1:c3d69f309845 893 </ul>
Osamu Nakamura 1:c3d69f309845 894 </li>
Osamu Nakamura 1:c3d69f309845 895 <li>戻り値: {undefined}</li>
Osamu Nakamura 1:c3d69f309845 896 </ul>
Osamu Nakamura 1:c3d69f309845 897 <p>JPEGデータをビットマップ画像に変換します。処理は非同期で行われ、処理が完了または失敗すると、コールバック関数が呼び出されます。</p>
Osamu Nakamura 1:c3d69f309845 898 <!--
Osamu Nakamura 1:c3d69f309845 899 * C++ライブラリ側API
Osamu Nakamura 1:c3d69f309845 900 * JPEG_Converter::decode
Osamu Nakamura 1:c3d69f309845 901 -->
Osamu Nakamura 1:c3d69f309845 902 <h4 id="-">使用例</h4>
Osamu Nakamura 1:c3d69f309845 903 <pre><code class="lang-javascript"><span class="hljs-keyword">var</span> AlignedBuffer = <span class="hljs-built_in">require</span>(<span class="hljs-string">'aligned_buffer'</span>).AlignedBuffer;
Osamu Nakamura 1:c3d69f309845 904 <span class="hljs-keyword">var</span> jpeg = <span class="hljs-built_in">require</span>(<span class="hljs-string">'jpeg'</span>);
Osamu Nakamura 1:c3d69f309845 905 <span class="hljs-keyword">var</span> fs = <span class="hljs-built_in">require</span>(<span class="hljs-string">'fs'</span>);
Osamu Nakamura 1:c3d69f309845 906 <span class="hljs-keyword">var</span> config = {
Osamu Nakamura 1:c3d69f309845 907 <span class="hljs-attr">width</span>: <span class="hljs-number">480</span>,
Osamu Nakamura 1:c3d69f309845 908 <span class="hljs-attr">height</span>: <span class="hljs-number">272</span>,
Osamu Nakamura 1:c3d69f309845 909 <span class="hljs-attr">format</span>: <span class="hljs-string">'argb8888'</span>,
Osamu Nakamura 1:c3d69f309845 910 <span class="hljs-attr">alpha</span>: <span class="hljs-number">0xFF</span>
Osamu Nakamura 1:c3d69f309845 911 };
Osamu Nakamura 1:c3d69f309845 912 fs.readFile(<span class="hljs-string">'/sd/input.jpg'</span>, <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params">err, jpegData</span>) </span>{
Osamu Nakamura 1:c3d69f309845 913 <span class="hljs-keyword">if</span> (err) {
Osamu Nakamura 1:c3d69f309845 914 <span class="hljs-comment">/* ファイル読み込み失敗... */</span>
Osamu Nakamura 1:c3d69f309845 915 <span class="hljs-built_in">console</span>.log(err);
Osamu Nakamura 1:c3d69f309845 916 <span class="hljs-keyword">return</span>;
Osamu Nakamura 1:c3d69f309845 917 }
Osamu Nakamura 1:c3d69f309845 918 <span class="hljs-keyword">var</span> buf = <span class="hljs-keyword">new</span> AlignedBuffer(jpegData, <span class="hljs-number">32</span>);
Osamu Nakamura 1:c3d69f309845 919 jpeg.decode(buf, config, <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params">err, image</span>) </span>{
Osamu Nakamura 1:c3d69f309845 920 <span class="hljs-keyword">if</span> (err) {
Osamu Nakamura 1:c3d69f309845 921 <span class="hljs-comment">/* デコード失敗... */</span>
Osamu Nakamura 1:c3d69f309845 922 <span class="hljs-built_in">console</span>.log(err);
Osamu Nakamura 1:c3d69f309845 923 <span class="hljs-keyword">return</span>;
Osamu Nakamura 1:c3d69f309845 924 }
Osamu Nakamura 1:c3d69f309845 925 <span class="hljs-comment">/* 成功... */</span>
Osamu Nakamura 1:c3d69f309845 926 });
Osamu Nakamura 1:c3d69f309845 927 });
Osamu Nakamura 1:c3d69f309845 928 </code></pre>
Osamu Nakamura 1:c3d69f309845 929 <h2 id="jpeg-decodesync-jpegdata-config-">jpeg.decodeSync(jpegData, config)</h2>
Osamu Nakamura 1:c3d69f309845 930 <ul>
Osamu Nakamura 1:c3d69f309845 931 <li><code>jpegData</code> {AlignedBuffer} JPEGデータを格納したバッファ。32バイトのアライメントである必要があります。</li>
Osamu Nakamura 1:c3d69f309845 932 <li><code>config</code> {Object} デコード設定。<ul>
Osamu Nakamura 1:c3d69f309845 933 <li><code>width</code> {number} 出力するビットマップの幅(ピクセル数)。この値は偶数でなければなりません。</li>
Osamu Nakamura 1:c3d69f309845 934 <li><code>height</code> {number} 出力するビットマップの高さ(ピクセル数)。</li>
Osamu Nakamura 1:c3d69f309845 935 <li><code>format</code> {string} 出力するビットマップのピクセルフォーマット。<code>&quot;ycbcr422&quot;</code>,<code>&quot;rgb565&quot;</code>,<code>&quot;argb8888&quot;</code>のいずれか。</li>
Osamu Nakamura 1:c3d69f309845 936 <li><code>alpha</code> {number} ピクセルフォーマットが<code>&quot;argb8888&quot;</code>のときの透過度。<code>0</code>~<code>255</code>の値。(省略時: <code>255</code>)</li>
Osamu Nakamura 1:c3d69f309845 937 </ul>
Osamu Nakamura 1:c3d69f309845 938 </li>
Osamu Nakamura 1:c3d69f309845 939 <li>戻り値: {Object} デコードされたビットマップ画像<ul>
Osamu Nakamura 1:c3d69f309845 940 <li><code>width</code> {number} 画像の幅(ピクセル数)。</li>
Osamu Nakamura 1:c3d69f309845 941 <li><code>height</code> {number} 画像の高さ(ピクセル数)。</li>
Osamu Nakamura 1:c3d69f309845 942 <li><code>format</code> {string} 画像のピクセルフォーマット。<code>&quot;ycbcr422&quot;</code>,<code>&quot;rgb565&quot;</code>,<code>&quot;argb8888&quot;</code>のいずれか。</li>
Osamu Nakamura 1:c3d69f309845 943 <li><code>bitmap</code> {AlignedBuffer} 画素データ。32バイトのアライメントです。</li>
Osamu Nakamura 1:c3d69f309845 944 </ul>
Osamu Nakamura 1:c3d69f309845 945 </li>
Osamu Nakamura 1:c3d69f309845 946 </ul>
Osamu Nakamura 1:c3d69f309845 947 <p><code>jpeg.decode()</code>の同期版です。処理は同期で行われ、処理が完了するとビットマップ画像を格納したオブジェクトを返却します。失敗すると例外をスローします。</p>
Osamu Nakamura 1:c3d69f309845 948 <h4 id="-">使用例</h4>
Osamu Nakamura 1:c3d69f309845 949 <pre><code class="lang-javascript"><span class="hljs-keyword">var</span> AlignedBuffer = <span class="hljs-built_in">require</span>(<span class="hljs-string">'aligned_buffer'</span>).AlignedBuffer;
Osamu Nakamura 1:c3d69f309845 950 <span class="hljs-keyword">var</span> jpeg = <span class="hljs-built_in">require</span>(<span class="hljs-string">'jpeg'</span>);
Osamu Nakamura 1:c3d69f309845 951 <span class="hljs-keyword">var</span> fs = <span class="hljs-built_in">require</span>(<span class="hljs-string">'fs'</span>);
Osamu Nakamura 1:c3d69f309845 952 <span class="hljs-keyword">var</span> config = {
Osamu Nakamura 1:c3d69f309845 953 <span class="hljs-attr">width</span>: <span class="hljs-number">480</span>,
Osamu Nakamura 1:c3d69f309845 954 <span class="hljs-attr">height</span>: <span class="hljs-number">272</span>,
Osamu Nakamura 1:c3d69f309845 955 <span class="hljs-attr">format</span>: <span class="hljs-string">'argb8888'</span>,
Osamu Nakamura 1:c3d69f309845 956 <span class="hljs-attr">alpha</span>: <span class="hljs-number">0xFF</span>
Osamu Nakamura 1:c3d69f309845 957 };
Osamu Nakamura 1:c3d69f309845 958 <span class="hljs-keyword">try</span> {
Osamu Nakamura 1:c3d69f309845 959 <span class="hljs-keyword">var</span> jpegData = fs.readFileSync(<span class="hljs-string">'/sd/input.jpg'</span>);
Osamu Nakamura 1:c3d69f309845 960 <span class="hljs-keyword">var</span> buf = <span class="hljs-keyword">new</span> AlignedBuffer(jpegData, <span class="hljs-number">32</span>);
Osamu Nakamura 1:c3d69f309845 961 <span class="hljs-keyword">var</span> image = jpeg.decodeSync(buf, config);
Osamu Nakamura 1:c3d69f309845 962 <span class="hljs-comment">/* 成功... */</span>
Osamu Nakamura 1:c3d69f309845 963 } <span class="hljs-keyword">catch</span> (err) {
Osamu Nakamura 1:c3d69f309845 964 <span class="hljs-built_in">console</span>.log(err);
Osamu Nakamura 1:c3d69f309845 965 }
Osamu Nakamura 1:c3d69f309845 966 </code></pre>
Osamu Nakamura 1:c3d69f309845 967 </body></html>