public static Image createThumbnail(Image image,int width) 
{
int sourceWidth = image.getWidth();
int sourceHeight = image.getHeight();
int thumbWidth = width;
int thumbHeight = -1;
if (thumbHeight == -1)
thumbHeight = thumbWidth * sourceHeight / sourceWidth;
Image thumb = Image.createImage(thumbWidth, thumbHeight);
Graphics g = thumb.getGraphics();
for (int y = 0; y < thumbHeight; y++) {
for (int x = 0; x < thumbWidth; x++) {
g.setClip(x, y, 1, 1);//設(shè)置該像素點(diǎn)以外的區(qū)域繪制無效
int dx = x * sourceWidth / thumbWidth;
int dy = y * sourceHeight / thumbHeight;
g.drawImage(image, x - dx, y - dy,Graphics.LEFT | Graphics.TOP);//重繪整張圖，實(shí)際上只是重繪了一個(gè)像素點(diǎn)
}
}
return thumb;
}
上面的代碼用來在J2ME中繪制圖片的縮略圖，CLDC1.0的用法，2.0可以直接操控像素了
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posted on 2009-12-19 15:42
TiGERTiAN 閱讀(1412)
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