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author | Paul Gardiner <paul.gardiner@artifex.com> | 2014-04-23 10:15:34 +0100 |
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committer | Paul Gardiner <paul.gardiner@artifex.com> | 2014-04-24 10:05:44 +0100 |
commit | 7fbb212ad2dbf247eec66d7f5ffe6672a75a43ec (patch) | |
tree | 9b111b54fbdbd493dd53e34f8146c8dfe450aa05 /platform/ios/Classes | |
parent | 2eabdfb49215ad955462a2a6441a8032bc68ab1f (diff) | |
download | mupdf-7fbb212ad2dbf247eec66d7f5ffe6672a75a43ec.tar.xz |
iOS: perform rendering for AirPrint in strips
Diffstat (limited to 'platform/ios/Classes')
-rw-r--r-- | platform/ios/Classes/MuPrintPageRenderer.m | 53 |
1 files changed, 38 insertions, 15 deletions
diff --git a/platform/ios/Classes/MuPrintPageRenderer.m b/platform/ios/Classes/MuPrintPageRenderer.m index 1b6d6769..ba452d6b 100644 --- a/platform/ios/Classes/MuPrintPageRenderer.m +++ b/platform/ios/Classes/MuPrintPageRenderer.m @@ -1,6 +1,8 @@ #include "common.h" #import "MuPrintPageRenderer.h" +const int MaxStripPixels = 1024*1024; + @implementation MuPrintPageRenderer -(id) initWithDocRef:(MuDocRef *)aDocRef @@ -149,27 +151,48 @@ static void renderPage(fz_document *doc, fz_page *page, fz_pixmap *pix, fz_matri pageSize.height *= scale.height; CGSize pageSizePix = {roundf(pageSize.width * dpi / ppi), roundf(pageSize.height * dpi /ppi)}; + int max_strip_height = MaxStripPixels / (int)pageSizePix.width; + if (pageSizePix.height > max_strip_height) + pageSizePix.height = max_strip_height; + CGSize stripSize = {pageSize.width, pageSizePix.height * ppi / dpi}; - pix = createPixMap(pageSizePix); - if (!pix) - goto exit; + float cursor = 0.0; - dataref = wrapPixmap(pix); - if (dataref == NULL) - goto exit; + while (cursor < pageSize.height) + { + // Overlap strips by 1 point + if (cursor > 0.0) + cursor -= 1.0; - img = newCGImageWithPixmap(pix, dataref); - if (img == NULL) - goto exit; + pix = createPixMap(pageSizePix); + if (!pix) + goto exit; - fz_matrix ctm; - fz_scale(&ctm, scale.width * dpi / ppi, -scale.height * dpi / ppi); - fz_pre_translate(&ctm, 0, -pageSize.height); + dataref = wrapPixmap(pix); + if (dataref == NULL) + goto exit; - renderPage(docRef->doc, page, pix, &ctm); + img = newCGImageWithPixmap(pix, dataref); + if (img == NULL) + goto exit; - CGRect rect = {{0.0,0.0},pageSize}; - CGContextDrawImage(cgctx, rect, img); + fz_matrix ctm; + fz_scale(&ctm, dpi / ppi, -dpi / ppi); + fz_pre_translate(&ctm, 0, -stripSize.height-cursor); + fz_pre_scale(&ctm, scale.width, scale.height); + + renderPage(docRef->doc, page, pix, &ctm); + + CGRect rect = {{0.0,cursor},stripSize}; + CGContextDrawImage(cgctx, rect, img); + + CGImageRelease(img); + img = NULL; + CGDataProviderRelease(dataref); // releases pix + dataref = NULL; + + cursor += stripSize.height; + } exit: freePage(docRef->doc, page); |