gnu/packages/patches/gd-freetype-test-failure.patch

   1 Fix a test failure with freetype 2.7:
   2
   3 https://github.com/libgd/libgd/commit/a5570d3ed30ff76c2a8bdd54f4ab1825acca0143
   4
   5 Patch copied from upstream source repository:
   6
   7 https://github.com/libgd/libgd/commit/a5570d3ed30ff76c2a8bdd54f4ab1825acca0143
   8
   9 From a5570d3ed30ff76c2a8bdd54f4ab1825acca0143 Mon Sep 17 00:00:00 2001
  10 From: "Christoph M. Becker" <cmbecker69@gmx.de>
  11 Date: Sun, 29 Jan 2017 17:07:50 +0100
  12 Subject: [PATCH] Fix #302: Test suite fails with freetype 2.7
  13
  14 Actually, the test failures are not necessarily related to freetype
  15 2.7, but rather are caused by subpixel hinting which is enabled by
  16 default in freetype 2.7. Subpixel hinting is, however, already
  17 available in freetype 2.5 and in versions having the "Infinality"
  18 patch.
  19
  20 To get the expected results in all environments, we have to disable
  21 subpixel hinting, what is easily done by setting a respective
  22 environment variable.
  23
  24 See also:
  25 * https://www.freetype.org/freetype2/docs/subpixel-hinting.html
  26 * https://www.freetype.org/freetype2/docs/reference/ft2-tt_driver.html
  27 ---
  28  tests/freetype/bug00132.c                    | 3 +++
  29  tests/gdimagestringft/gdimagestringft_bbox.c | 3 +++
  30  2 files changed, 6 insertions(+)
  31
  32 diff --git a/tests/freetype/bug00132.c b/tests/freetype/bug00132.c
  33 index 713dd2d..42ed5b1 100644
  34 --- a/tests/freetype/bug00132.c
  35 +++ b/tests/freetype/bug00132.c
  36 @@ -11,6 +11,9 @@ int main()
  37         char *path;
  38         char *ret = NULL;
  39
  40 +       /* disable subpixel hinting */
  41 +       putenv("FREETYPE_PROPERTIES=truetype:interpreter-version=35");
  42 +
  43         im = gdImageCreateTrueColor(50, 30);
  44
  45         if (!im) {
  46 diff --git a/tests/gdimagestringft/gdimagestringft_bbox.c b/tests/gdimagestringft/gdimagestringft_bbox.c
  47 index 0161ec8..1596a9e 100644
  48 --- a/tests/gdimagestringft/gdimagestringft_bbox.c
  49 +++ b/tests/gdimagestringft/gdimagestringft_bbox.c
  50 @@ -38,6 +38,9 @@ int main()
  51         int error = 0;
  52         FILE *fp;
  53
  54 +       /* disable subpixel hinting */
  55 +       putenv("FREETYPE_PROPERTIES=truetype:interpreter-version=35");
  56 +
  57         path = gdTestFilePath("freetype/DejaVuSans.ttf");
  58         im = gdImageCreate(800, 800);
  59         gdImageColorAllocate(im, 0xFF, 0xFF, 0xFF); /* allocate white for background color */