Android Open Source - RadaeePDF-B4A P D F Crop

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Back to project page RadaeePDF-B4A.

License

The source code is released under:

Apache License

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Java Source Code

package com.radaee.reader;
import com.radaee.pdf.*;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.view.View;
//  w  w  w. j  ava2  s .  co  m
/**
 * test view<br/>
 * this view clip one page as 100*100 blocks.<br/>
 * every block is a DIB data.
 * @author Radaee
 *
 */
public class PDFCrop extends View
{
  private Document m_doc = null;
  static private final int blk_w = 100;
  static private final int blk_h = 100;
  static private final float ratio = 1.0f;
  private int dibs[][];
  Bitmap bitmap;
  public PDFCrop(Context context)
  {
    super(context);
  }
  public PDFCrop(Context context, AttributeSet attrs)
  {
    super(context, attrs);
  }
  public void open( Document doc )
  {
    m_doc = doc;
    Page page = m_doc.GetPage(0);
    float w = m_doc.GetPageWidth(0) * ratio;
    float h = m_doc.GetPageHeight(0) * ratio;
    bitmap = Bitmap.createBitmap((int)w, (int)h, Config.ARGB_8888);
    bitmap.eraseColor(0xFFFFFFFF);
    int wcnt = (int)(w + blk_w - 1) / blk_w;
    int hcnt = (int)(h + blk_h - 1) / blk_h;
    dibs = new int[hcnt][wcnt];
    int y = 0;
    int hi = 0;
    while( hi < hcnt )
    {
      int x = 0;
      int wi = 0;
      while( wi < wcnt )
      {
        dibs[hi][wi] = Global.dibGet(0, blk_w, blk_h);
        Matrix mat = new Matrix(ratio, -ratio, -x, h - y);
        page.RenderPrePare(dibs[hi][wi]);
        page.Render(dibs[hi][wi], mat);
        mat.Destroy();
        x += blk_w;
        wi++;
      }
      y += blk_h;
      hi++;
    }
    page.Close();
  }
  public void close()
  {
    float w = m_doc.GetPageWidth(0) * ratio;
    float h = m_doc.GetPageHeight(0) * ratio;
    int wcnt = (int)(w + blk_w - 1) / blk_w;
    int hcnt = (int)(h + blk_h - 1) / blk_h;
    int hi = 0;
    while( hi < hcnt )
    {
      int wi = 0;
      while( wi < wcnt )
      {
        Global.dibFree(dibs[hi][wi]);
        wi++;
      }
      hi++;
    }
    m_doc = null;
    bitmap.recycle();
  }
  protected void onDraw( Canvas canvas )
  {
    if( m_doc != null )
    {
      int bmp = Global.lockBitmap(bitmap);
      float w = m_doc.GetPageWidth(0) * ratio;
      float h = m_doc.GetPageHeight(0) * ratio;
      int wcnt = (int)(w + blk_w - 1) / blk_w;
      int hcnt = (int)(h + blk_h - 1) / blk_h;
      int y = 0;
      int hi = 0;
      while( hi < hcnt )
      {
        int x = 0;
        int wi = 0;
        while( wi < wcnt )
        {
          Global.drawToBmp(bmp, dibs[hi][wi], x, y);
          x += blk_w;
          wi++;
        }
        y += blk_h;
        hi++;
      }
      Global.unlockBitmap(bitmap, bmp);
      canvas.drawBitmap(bitmap, 0, 0, null);
    }
  }
}

Java Source Code List