/*
* ImageUtil.java
*
* Created on 2008年1月11日, 上午9:26
*
*/
/**
*
* @author alajl
*/
import javax.microedition.lcdui.*;
import javax.microedition.lcdui.game.Sprite;
public class ImageUtil
{
public static final int TURN_LEFT = 1;
public static final int TURN_RIGHT = 2;
/*
*获取图片RGB数据,并返回大小为width*height大小的一维数组
*/
public int[] getPixels(Image src)
{
int w = src.getWidth();
int h = src.getHeight();
int[] pixels = new int[w * h];
src.getRGB(pixels, 0, w, 0, 0, w, h);
return pixels;
}
/*
*将pixels[]里的数据,生成一张图片,图片宽为w,高为h
*/
public Image drawPixels(int[] pixels, int w, int h)
{
Image image = Image.createRGBImage(pixels, w, h, true);
pixels = null;
return image;
}
/*
*调整图片大小
*destW 调整后的宽,destH调整后的高
*/
public Image effect_resizeImage(Image src, int destW, int destH)
{
int srcW = src.getWidth();
int srcH = src.getHeight();
int[] destPixels = new int[destW * destH];
int[] srcPixels = getPixels(src);
for (int destY = 0; destY < destH; ++destY)
{
for (int destX = 0; destX < destW; ++destX)
{
int srcX = (destX * srcW) / destW;
int srcY = (destY * srcH) / destH;
destPixels[destX + destY * destW] = srcPixels[srcX + srcY
* srcW];
}
}
return drawPixels(destPixels, destW, destH);
}
/*
* 调整图片亮度与对比度。 contrast 对比度,light 亮度
*/
public Image effect_light_contrast(Image src,double contrast,int light)
{
int srcW = src.getWidth();
int srcH = src.getHeight();
int[] srcPixels = getPixels(src);
int r = 0;
int g = 0;
int b = 0;
int a = 0;
int argb;
//公式y =ax+b a为对比度,b为亮度
//int para_b = light - 127 * (light - 1);
for (int i = 0; i < srcH; i++)
{
for(int ii=0;ii<srcW;ii++)
{
argb = srcPixels[i*srcW+ii];
a = ((argb & 0xff000000) >> 24); // alpha channel
r =((argb & 0x00ff0000) >> 16); // red channel
g =((argb & 0x0000ff00) >> 8); // green channel
b =(argb & 0x000000ff); // blue channel
r =(int)( r*contrast+light);
g =(int)( g*contrast+light);
b =(int)( b*contrast+light);
/*r =(int)((r -127 ) * contrast + 127+para_b);
g =(int)((g -127 ) * contrast + 127+para_b);
b =(int)((b -127 ) * contrast + 127+para_b);*/
if(r>255)
r = 255;
else if(r<0) r=0;
if(g>255)
g = 255;
else if(g<0) g=0;
if(b>255)
b = 255;
else if(b<0) b=0;
srcPixels[i*srcW+ii] = ((a << 24) | (r << 16) | (g << 8) | b);
}
}
return drawPixels(srcPixels, srcW, srcH);
}
/*
* 图片镜像特效
*/
public Image effect_mirror(Image src)
{
int srcW = src.getWidth();
int srcH = src.getHeight();
int[] srcPixels = getPixels(src);
int len;
int temp;
for (int i = 0; i < srcH; i++)
{
len = (i+1)*srcW;
for(int ii=0;ii<srcW/2;ii++)
{
temp=srcPixels[i*srcW+ii];
srcPixels[i*srcW+ii]=srcPixels[len-1-ii];
srcPixels[len-1-ii]=temp;
}
}
return drawPixels(srcPixels, srcW, srcH);
}
/*
* 图片剪切,cut_xpos,cut_ypos 切割框的起始位置坐标,cut_width,cut_height 切割框的宽与高
*/
public Image effect_cut(Image src,int cut_xpos,int cut_ypos,int cut_width,int cut_height)
{
int srcW = src.getWidth();
int srcH = src.getHeight();
int[] srcPixels = getPixels(src);
int[] desPixels = new int[cut_width*cut_height];
int argb;
int num = 0;
for (int i = 0; i < srcH; i++)
{
if(i >= cut_ypos&&i<cut_height+cut_ypos)
{
for(int ii=0;ii<srcW;ii++)
{
if(ii>=cut_xpos && ii<cut_width+cut_xpos)
{
desPixels[num] = srcPixels[i*srcW+ii];
num++;
}
}
}
}
return drawPixels(desPixels, cut_width, cut_height);
}
/*
* 图片叠加,将src和image合成一张图片,x_pos,y_pos一般为0,0,也可以为自定义值
*/
public Image effect_image_add_image(Image src,Image image,int x_pos,int y_pos)
{
Image temp = Image.createImage(src.getWidth(),src.getHeight());
Graphics g = temp.getGraphics();
//g.drawImage(src,x_pos,y_pos,Graphics.LEFT|Graphics.TOP);
//g.drawImage(image,x_pos,y_pos,Graphics.LEFT|Graphics.TOP);*/
int alpha = 168;
int []srcRgbdata = new int[src.getWidth()*src.getHeight()];
int []desRgbdata = new int[image.getWidth()*image.getHeight()];
src.getRGB(srcRgbdata,0,src.getWidth(),0,0,src.getWidth(),src.getHeight());
image.getRGB(desRgbdata,0,image.getWidth(),0,0,image.getWidth(),image.getHeight());
g.drawRGB(getTransImg(alpha,srcRgbdata,desRgbdata),0,src.getWidth(),0,0,src.getWidth(),src.getHeight(),false);
src=null;
image=null;
return temp;
}
/*
* 图片上添加字符
*/
public Image effect_image_add_str(Image src,String str,int x_pos,int y_pos)
{
Image temp = Image.createImage(src.getWidth(),src.getHeight());
Graphics g = temp.getGraphics();
g.drawImage(src,0,0,Graphics.LEFT|Graphics.TOP);
g.setColor(0x000000);
g.drawString(str,x_pos,y_pos,Graphics.LEFT|Graphics.TOP);
return temp;
}
/*
* 图片特效负片
*/
public Image effect_negative(Image src)
{
int srcW = src.getWidth();
int srcH = src.getHeight();
int[] srcPixels = getPixels(src);
int r = 0;
int g = 0;
int b = 0;
int a = 0;
int argb;
for (int i = 0; i < srcH; i++)
{
for(int ii=0;ii<srcW;ii++)
{
argb = srcPixels[i*srcW+ii];
a = ((argb & 0xff000000) >> 24); // alpha channel
r =255-((argb & 0x00ff0000) >> 16); // red channel
g =255-((argb & 0x0000ff00) >> 8); // green channel
b =255-(argb & 0x000000ff); // blue channel
srcPixels[i*srcW+ii] = ((a << 24) | (r << 16) | (g << 8) | b);
}
}
return drawPixels(srcPixels, srcW, srcH);
}
/*
* 图片特效黑白
*/
public Image effect_black_white(Image src)
{
int srcW = src.getWidth();
int srcH = src.getHeight();
int[] srcPixels = getPixels(src);
int r = 0;
int g = 0;
int b = 0;
int a = 0;
int argb;
int temp;
for (int i = 0; i < srcH; i++)
{
for(int ii=0;ii<srcW;ii++)
{
argb = srcPixels[i*srcW