45 lines
1.8 KiB
Diff
45 lines
1.8 KiB
Diff
From 4f4d89506f58a64b4829b1bb239bab9e46d63727 Mon Sep 17 00:00:00 2001
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From: Jehan <jehan@girinstud.io>
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Date: Tue, 19 Jan 2021 12:42:31 +0100
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Subject: [PATCH] src: do not override explicitly requested grayscale
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antialiasing.
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If CAIRO_ANTIALIAS_DEFAULT is selected and system is set to subpixel, it
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is perfectly normal to switch to CAIRO_ANTIALIAS_SUBPIXEL.
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But when the calling application specifically requested
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CAIRO_ANTIALIAS_GRAY then Cairo should honor the request.
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This is an issue we have had for years in PIKA, where text on images
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would render differently depending on the system the file is opened on.
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This is obviously not right as a graphics work should be system
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independant and allow the creator to decide if one wants a text to have
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grayscale or subpixel rendering (a settings which would stick when
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sharing the work file). Cairo should not override this.
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The CAIRO_ANTIALIAS_DEFAULT settings exists exactly for this (when we
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want Cairo to choose for us, in a system-dependant way); other settings
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are when we need system independance.
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Thanks to Adam Fontenot for initial investigations and tests on this and
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other contributors before this.
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---
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src/cairo-ft-font.c | 3 +--
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1 file changed, 1 insertion(+), 2 deletions(-)
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diff --git a/src/cairo-ft-font.c b/src/cairo-ft-font.c
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index d2221edec..1f5befec3 100644
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--- a/src/cairo-ft-font.c
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+++ b/src/cairo-ft-font.c
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@@ -1945,8 +1945,7 @@ _cairo_ft_options_merge (cairo_ft_options_t *options,
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}
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if (other->base.antialias == CAIRO_ANTIALIAS_SUBPIXEL &&
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- (options->base.antialias == CAIRO_ANTIALIAS_DEFAULT ||
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- options->base.antialias == CAIRO_ANTIALIAS_GRAY)) {
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+ options->base.antialias == CAIRO_ANTIALIAS_DEFAULT) {
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options->base.antialias = CAIRO_ANTIALIAS_SUBPIXEL;
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options->base.subpixel_order = other->base.subpixel_order;
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}
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--
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GitLab
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