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#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
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