sunjpegencoderadapter.html

来自「jfreechart1。0。2的api。」· HTML 代码 · 共 246 行 · 第 1/2 页

<FONT color="green">121</FONT>         *<a name="line.121"></a>
<FONT color="green">122</FONT>         * @param encodingAlpha  ignored.<a name="line.122"></a>
<FONT color="green">123</FONT>         */<a name="line.123"></a>
<FONT color="green">124</FONT>        public void setEncodingAlpha(boolean encodingAlpha) {<a name="line.124"></a>
<FONT color="green">125</FONT>            //  No op<a name="line.125"></a>
<FONT color="green">126</FONT>        }<a name="line.126"></a>
<FONT color="green">127</FONT>    <a name="line.127"></a>
<FONT color="green">128</FONT>        /**<a name="line.128"></a>
<FONT color="green">129</FONT>         * Encodes an image in JPEG format.<a name="line.129"></a>
<FONT color="green">130</FONT>         *<a name="line.130"></a>
<FONT color="green">131</FONT>         * @param bufferedImage  the image to be encoded (&lt;code&gt;null&lt;/code&gt; not <a name="line.131"></a>
<FONT color="green">132</FONT>         *     permitted).<a name="line.132"></a>
<FONT color="green">133</FONT>         * <a name="line.133"></a>
<FONT color="green">134</FONT>         * @return The byte[] that is the encoded image.<a name="line.134"></a>
<FONT color="green">135</FONT>         * <a name="line.135"></a>
<FONT color="green">136</FONT>         * @throws IOException if there is an I/O problem.<a name="line.136"></a>
<FONT color="green">137</FONT>         * @throws NullPointerException if &lt;code&gt;bufferedImage&lt;/code&gt; is <a name="line.137"></a>
<FONT color="green">138</FONT>         *     &lt;code&gt;null&lt;/code&gt;.<a name="line.138"></a>
<FONT color="green">139</FONT>         */<a name="line.139"></a>
<FONT color="green">140</FONT>        public byte[] encode(BufferedImage bufferedImage) throws IOException {<a name="line.140"></a>
<FONT color="green">141</FONT>            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();<a name="line.141"></a>
<FONT color="green">142</FONT>            encode(bufferedImage, outputStream);<a name="line.142"></a>
<FONT color="green">143</FONT>            return outputStream.toByteArray();<a name="line.143"></a>
<FONT color="green">144</FONT>        }<a name="line.144"></a>
<FONT color="green">145</FONT>    <a name="line.145"></a>
<FONT color="green">146</FONT>        /**<a name="line.146"></a>
<FONT color="green">147</FONT>         * Encodes an image in JPEG format and writes it to an output stream.<a name="line.147"></a>
<FONT color="green">148</FONT>         *<a name="line.148"></a>
<FONT color="green">149</FONT>         * @param bufferedImage  the image to be encoded (&lt;code&gt;null&lt;/code&gt; not <a name="line.149"></a>
<FONT color="green">150</FONT>         *     permitted).<a name="line.150"></a>
<FONT color="green">151</FONT>         * @param outputStream  the OutputStream to write the encoded image to <a name="line.151"></a>
<FONT color="green">152</FONT>         *     (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.152"></a>
<FONT color="green">153</FONT>         * <a name="line.153"></a>
<FONT color="green">154</FONT>         * @throws IOException if there is an I/O problem.<a name="line.154"></a>
<FONT color="green">155</FONT>         * @throws NullPointerException if &lt;code&gt;bufferedImage&lt;/code&gt; is <a name="line.155"></a>
<FONT color="green">156</FONT>         *     &lt;code&gt;null&lt;/code&gt;.<a name="line.156"></a>
<FONT color="green">157</FONT>         */<a name="line.157"></a>
<FONT color="green">158</FONT>        public void encode(BufferedImage bufferedImage, OutputStream outputStream) <a name="line.158"></a>
<FONT color="green">159</FONT>                throws IOException {<a name="line.159"></a>
<FONT color="green">160</FONT>            if (bufferedImage == null) {<a name="line.160"></a>
<FONT color="green">161</FONT>                throw new IllegalArgumentException("Null 'image' argument.");<a name="line.161"></a>
<FONT color="green">162</FONT>            }<a name="line.162"></a>
<FONT color="green">163</FONT>            if (outputStream == null) {<a name="line.163"></a>
<FONT color="green">164</FONT>                throw new IllegalArgumentException("Null 'outputStream' argument.");<a name="line.164"></a>
<FONT color="green">165</FONT>            }<a name="line.165"></a>
<FONT color="green">166</FONT>            Iterator iterator = ImageIO.getImageWritersByFormatName("jpeg");<a name="line.166"></a>
<FONT color="green">167</FONT>            ImageWriter writer = (ImageWriter) iterator.next();<a name="line.167"></a>
<FONT color="green">168</FONT>            ImageWriteParam p = writer.getDefaultWriteParam();<a name="line.168"></a>
<FONT color="green">169</FONT>            p.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);<a name="line.169"></a>
<FONT color="green">170</FONT>            p.setCompressionQuality(this.quality);<a name="line.170"></a>
<FONT color="green">171</FONT>            ImageOutputStream ios = ImageIO.createImageOutputStream(outputStream);<a name="line.171"></a>
<FONT color="green">172</FONT>            writer.setOutput(ios);<a name="line.172"></a>
<FONT color="green">173</FONT>            writer.write(null, new IIOImage(bufferedImage, null, null), p);<a name="line.173"></a>
<FONT color="green">174</FONT>            ios.flush();<a name="line.174"></a>
<FONT color="green">175</FONT>            writer.dispose();<a name="line.175"></a>
<FONT color="green">176</FONT>            ios.close();<a name="line.176"></a>
<FONT color="green">177</FONT>        }<a name="line.177"></a>
<FONT color="green">178</FONT>    <a name="line.178"></a>
<FONT color="green">179</FONT>    }<a name="line.179"></a>




























































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