1 files changed, 99 insertions, 0 deletions
diff --git a/platform/ios/Classes/MuPrintPageRenderer.m b/platform/ios/Classes/MuPrintPageRenderer.m
new file mode 100644
index 00000000..53e46423
--- /dev/null
+++ b/platform/ios/Classes/MuPrintPageRenderer.m
@@ -0,0 +1,99 @@
+//
+//  MuPrintPageRenderer.m
+//  MuPDF
+//
+//  Copyright (c) 2014 Artifex Software, Inc. All rights reserved.
+//
+
+#include "common.h"
+#import "MuPrintPageRenderer.h"
+
+@implementation MuPrintPageRenderer
+
+-(id) initWithDocRef:(MuDocRef *)aDocRef
+{
+	self = [super init];
+	if (self)
+	{
+		docRef = [aDocRef retain];
+	}
+	return  self;
+}
+
+-(void) dealloc
+{
+	[docRef release];
+	[super dealloc];
+}
+
+-(NSInteger) numberOfPages
+{
+	__block NSInteger npages = 0;
+	dispatch_sync(queue, ^{
+		fz_try(ctx)
+		{
+			npages = fz_count_pages(docRef->doc);
+		}
+		fz_catch(ctx);
+	});
+	return npages;
+}
+
+-(void) drawPageAtIndex:(NSInteger)pageIndex inRect:(CGRect)printableRect
+{
+	CGContextRef cgctx = UIGraphicsGetCurrentContext();
+
+	if (!cgctx) return;
+
+	CGSize paperSize = self.paperRect.size;
+	// We must perform mupdf calls within this function, but all library calls need
+	// to be on our background thread, so we run them synchronously on the queue
+
+	__block fz_pixmap *pix = NULL;
+	__block CGSize pageSize;
+	dispatch_sync(queue, ^{
+		fz_page *page = NULL;
+		fz_device *dev = NULL;
+		fz_var(page);
+		fz_var(dev);
+		fz_try(ctx)
+		{
+			fz_rect bounds;
+			fz_matrix ctm;
+			page = fz_load_page(docRef->doc, pageIndex);
+			fz_bound_page(docRef->doc, page, &bounds);
+			pageSize.width = bounds.x1 - bounds.x0;
+			pageSize.height = bounds.y1 - bounds.y0;
+			CGSize scale = fitPageToScreen(pageSize, paperSize);
+			pageSize.width = roundf(pageSize.width * scale.width);
+			pageSize.height = roundf(pageSize.height * scale.height);
+			// Need to render upside down. No idea why.
+			fz_scale(&ctm, scale.width, -scale.height);
+			fz_pre_translate(&ctm, 0, -pageSize.height);
+			pix = fz_new_pixmap(ctx, fz_device_rgb(ctx), pageSize.width, pageSize.height);
+			fz_clear_pixmap_with_value(ctx, pix, 255);
+			dev = fz_new_draw_device(ctx, pix);
+			fz_run_page(docRef->doc, page, dev, &ctm, NULL);
+		}
+		fz_always(ctx)
+		{
+			fz_free_page(docRef->doc, page);
+			fz_free_device(dev);
+		}
+		fz_catch(ctx)
+		{
+			printf("Failed to print page %d\n", pageIndex+1);
+		}
+	});
+
+	if (!pix) return;
+
+	CGRect rect = {{0.0,0.0},pageSize};
+	CGDataProviderRef dataref = wrapPixmap(pix);
+	CGImageRef img = newCGImageWithPixmap(pix, dataref);
+	CGContextDrawImage(cgctx, rect, img);
+	CGImageRelease(img);
+	CGDataProviderRelease(dataref); //releases pix
+}
+
+@end