Add helper functions to AndroidDrawDevice.

1 files changed, 49 insertions, 6 deletions

diff --git a/platform/java/src/com/artifex/mupdf/fitz/android/AndroidDrawDevice.java b/platform/java/src/com/artifex/mupdf/fitz/android/AndroidDrawDevice.java
index 2be2ae59..3e189ade 100644
--- a/platform/java/src/com/artifex/mupdf/fitz/android/AndroidDrawDevice.java
+++ b/platform/java/src/com/artifex/mupdf/fitz/android/AndroidDrawDevice.java
@@ -4,22 +4,65 @@ import android.graphics.Bitmap;
 
 import com.artifex.mupdf.fitz.NativeDevice;
 import com.artifex.mupdf.fitz.RectI;
+import com.artifex.mupdf.fitz.Rect;
+
+import com.artifex.mupdf.fitz.Page;
+import com.artifex.mupdf.fitz.Matrix;
 
 public final class AndroidDrawDevice extends NativeDevice
 {
-	// NOT static.
 	private native long newNative(Bitmap bitmap, int pageX0, int pageY0, int pageX1, int pageY1, int patchX0, int patchY0, int patchX1, int patchY1);
 
-	// Construction
-	public AndroidDrawDevice(Bitmap bitmap, int pageX0, int pageY0, int pageX1, int pageY1, int patchX0, int patchY0, int patchX1, int patchY1)
-	{
+	public AndroidDrawDevice(Bitmap bitmap,
+			int pageX0, int pageY0, int pageX1, int pageY1,
+			int patchX0, int patchY0, int patchX1, int patchY1) {
 		super(0);
 		pointer = newNative(bitmap, pageX0, pageY0, pageX1, pageY1, patchX0, patchY0, patchX1, patchY1);
 	}
 
-	public AndroidDrawDevice(Bitmap bitmap, RectI page, RectI patch)
-	{
+	public AndroidDrawDevice(Bitmap bitmap, RectI page, RectI patch) {
 		super(0);
 		pointer = newNative(bitmap, page.x0, page.y0, page.x1, page.y1, patch.x0, patch.y0, patch.x1, patch.y1);
 	}
+
+	public static Bitmap drawPage(Page page, Matrix ctm) {
+		Rect fbox = page.getBounds().transform(ctm);
+		RectI ibox = new RectI((int)fbox.x0, (int)fbox.y0, (int)fbox.x1, (int)fbox.y1);
+		int w = ibox.x1 - ibox.x0;
+		int h = ibox.y1 - ibox.y0;
+		Bitmap bmp = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
+		AndroidDrawDevice dev = new AndroidDrawDevice(bmp, ibox, ibox);
+		page.run(dev, ctm, null);
+		dev.close();
+		dev.destroy();
+		return bmp;
+	}
+
+	public static Bitmap drawPage(Page page, float dpi, int rotate) {
+		return drawPage(page, new Matrix(dpi / 72).rotate(rotate));
+	}
+
+	public static Bitmap drawPage(Page page, float dpi) {
+		return drawPage(page, new Matrix(dpi / 72));
+	}
+
+	public static Bitmap drawPageFit(Page page, int fitW, int fitH) {
+		Rect bbox = page.getBounds();
+		float pageW = bbox.x1 - bbox.x0;
+		float pageH = bbox.y1 - bbox.y0;
+		float scaleH = (float)fitW / pageW;
+		float scaleV = (float)fitH / pageH;
+		float scale = scaleH < scaleV ? scaleH : scaleV;
+		scaleH = (float)Math.floor(pageW * scale) / pageW;
+		scaleV = (float)Math.floor(pageH * scale) / pageH;
+		return drawPage(page, new Matrix(scaleH, scaleV));
+	}
+
+	public static Bitmap drawPageFitWidth(Page page, int fitW) {
+		Rect bbox = page.getBounds();
+		float pageW = bbox.x1 - bbox.x0;
+		float scale = (float)fitW / pageW;
+		scale = (float)Math.floor(pageW * scale) / pageW;
+		return drawPage(page, new Matrix(scale));
+	}
 }