Attachment 134836 Details for Bug 103136 – use custom downscaling if scale < 0.5

[patch] use custom downscaling if scale < 0.5

0001-cairo-use-custom-downscaling-for-scaling-0.5.patch (text/plain), 1.09 KB, created by Adrian Johnson on 2017-10-13 21:26:39 UTC

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Creator: Adrian Johnson

Created: 2017-10-13 21:26:39 UTC

Size: 1.09 KB

patch

obsolete

>From e1b7bbbc0af7c2c0cf8e1286e80f7fbbe1c4c49f Mon Sep 17 00:00:00 2001
>From: Adrian Johnson <ajohnson@redneon.com>
>Date: Sat, 14 Oct 2017 07:48:11 +1030
>Subject: [PATCH] cairo: use custom downscaling for scaling < 0.5
>
>---
> poppler/CairoOutputDev.cc | 11 ++++++++++-
> 1 file changed, 10 insertions(+), 1 deletion(-)
>
>diff --git a/poppler/CairoOutputDev.cc b/poppler/CairoOutputDev.cc
>index 80f7a99e..77183009 100644
>--- a/poppler/CairoOutputDev.cc
>+++ b/poppler/CairoOutputDev.cc
>@@ -3085,7 +3085,16 @@ public:
>     bool needsCustomDownscaling = true;
> #endif
> 
>-    if (!needsCustomDownscaling || printing || scaledWidth >= width || scaledHeight >= height) {
>+    bool useCustomDownscaling = false;
>+    if (!printing) {
>+      if (needsCustomDownscaling && scaledWidth < width && scaledHeight < height)
>+	useCustomDownscaling = true;
>+
>+      if (width/scaledWidth > 2 || height/scaledHeight > 2)
>+	useCustomDownscaling = true;
>+    }
>+
>+    if (!useCustomDownscaling) {
>       // No downscaling. Create cairo image containing the source image data.
>       unsigned char *buffer;
>       int stride;
>-- 
>2.11.0
>

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Attachments on bug 103136: 134782 | 134836 | 134861

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