最新下载
热门教程
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
J2ME中对Image的缩放
时间:2022-07-02 17:42:47 编辑:袖梨 来源:一聚教程网
a sniplet from the article "Taking Pictures with MMAPI"
http://developers.sun.com/techtopics/mobility/midp/articles/picture/
[email protected]
创建缩略图
MIDP2.0中可以对图片中的像素进行操作,在MIDP1.0中则不然。本例用Graphics.setClip()实现每一次对一个像素进行绘制。
private Image createThumbnail(Image image) {
int sourceWidth = image.getWidth();
int sourceHeight = image.getHeight();
int thumb;
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);
int dx = x * sourceWidth / thumbWidth;
int dy = y * sourceHeight / thumbHeight;
g.drawImage(image, x - dx, y - dy,
Graphics.LEFT | Graphics.TOP);
}
}
Image immutableThumb = Image.createImage(thumb);
return immutableThumb;
}
http://developers.sun.com/techtopics/mobility/midp/articles/picture/
[email protected]
创建缩略图
MIDP2.0中可以对图片中的像素进行操作,在MIDP1.0中则不然。本例用Graphics.setClip()实现每一次对一个像素进行绘制。
private Image createThumbnail(Image image) {
int sourceWidth = image.getWidth();
int sourceHeight = image.getHeight();
int thumb;
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);
int dx = x * sourceWidth / thumbWidth;
int dy = y * sourceHeight / thumbHeight;
g.drawImage(image, x - dx, y - dy,
Graphics.LEFT | Graphics.TOP);
}
}
Image immutableThumb = Image.createImage(thumb);
return immutableThumb;
}
相关文章
- Hyperliquid (HYPE) 价格预测:MACD指标趋缓,41美元阻力位成为主要障碍 07-07
- 神奇海洋7月5日今日答案2025 07-07
- 三角洲行动黑鹰坠落彩蛋位置一览 07-07
- PI是什么币种?PI币前景与白皮书全面介绍 07-07
- 不良人破局装备获取途径 07-07
- 萤火突击兑换码有哪些-萤火突击兑换码兑换码一览 07-07