@Override
public final void load(final String uri) throws ReaderException {
super.load(uri);
MyLog.i(TAG, "Loading URI" + uri);
try {
file = new PDF(new File(uri), 1);
} catch (UnsatisfiedLinkError e) {
MyLog.e(TAG, "PDF library not available");
file = null;
}
}
@Override
public final Drawable getPage(final int page) throws ReaderException {
// check limits
if (this.file == null || page < 0 || page >= this.file.getPageCount()) {
return null;
}
ArrayList<Bitmap> tiles = new ArrayList<Bitmap>();
int zoom = ZOOM100; // 1000 means 100%
// Should we rotate the bitmaps?
boolean rotate = false;
PDF.Size size = new PDF.Size();
file.getPageSize(page, size);
int cols = 2;
int rows = 2;
// test if we have to rotate the screen
if (AUTOMATIC_ROTATION && size.width > size.height) {
rotate = true;
cols = this.getSuitableCols(size.height);
rows = this.getSuitableRows(size.width);
} else {
cols = this.getSuitableCols(size.width);
rows = this.getSuitableRows(size.height);
}
MyLog.d(TAG, "Using cols, rows: " + cols + ", " + rows);
// calculate an appropriate zoom level to fill the screen
// this enhance the quality of the rendered page.
if (AUTOMATIC_ZOOM && getWidth() != -1) {
if (rotate) {
if (size.height < getWidth()) {
// calculate the zoom level
zoom = ZOOM100 * getWidth() / size.height;
// if the zoom changes, the pdf size changes accordingly
size.width = (int) (1.0 * zoom * size.width / ZOOM100);
size.height = (int) (1.0 * zoom * size.height / ZOOM100);
MyLog.d(TAG, "Using zoom level of " + zoom);
} else {
MyLog.d(TAG, "PDF page larger than viewport");
}
} else {
if (size.width < getWidth()) {
// calculate the zoom level
zoom = ZOOM100 * getWidth() / size.width;
// if the zoom changes, the pdf size changes accordingly
size.width = (int) (1.0 * zoom * size.width / ZOOM100);
size.height = (int) (1.0 * zoom * size.height / ZOOM100);
MyLog.d(TAG, "Using zoom level of " + zoom);
} else {
MyLog.d(TAG, "PDF page larger than viewport");
}
}
} else {
MyLog.w(TAG, "Viewport size not set or no automatic zoom");
}
// Get the closest width and height that divisible by cols and rows
// note1: the last columns/rows of pixels in the image will be lost
int ow, oh;
if (rotate) {
// if the image is rotated, width and height switch places
oh = (size.width / rows) * rows;
ow = (size.height / cols) * cols;
} else {
ow = (size.width / cols) * cols;
oh = (size.height / rows) * rows;
}
// Get the final tiles width and height
int tw = ow / cols;
int th = oh / rows;
for (int i = 0; i < rows; i++) {
for (int j = 0; j < cols; j++) {
if (rotate) {
int left = th * i;
int top = tw * (cols - j - 1);
PDF.Size tilesize = new PDF.Size(th, tw);
int[] pixels = file.renderPage(page, zoom, left, top, 0, false, tilesize);
Bitmap b =
Bitmap.createBitmap(pixels, tilesize.width, tilesize.height, Bitmap.Config.RGB_565);
Matrix matrix = new Matrix();
matrix.postRotate(90);
tiles.add(Bitmap.createBitmap(b, 0, 0, b.getWidth(), b.getHeight(), matrix, true));
b.recycle();
} else {
int left = tw * j;
int top = th * i;
PDF.Size tilesize = new PDF.Size(tw, th);
int[] pixels = file.renderPage(page, zoom, left, top, 0, false, tilesize);
Bitmap b =
Bitmap.createBitmap(pixels, tilesize.width, tilesize.height, Bitmap.Config.RGB_565);
tiles.add(b);
}
}
}
return new TiledDrawable(tiles, cols, rows);
}
