Fix #307: GD_QUANT_NEUQUANT fails to unset trueColor flag

We must unset the trueColor image after converting it; gdImageCopy() wont't
(rightly) do that for us.

4 files changed, 29 insertions, 0 deletions

diff --git a/tests/gdimagetruecolortopalette/.gitignore b/tests/gdimagetruecolortopalette/.gitignore
index f049ddd..410ef59 100644
--- a/tests/gdimagetruecolortopalette/.gitignore
+++ b/tests/gdimagetruecolortopalette/.gitignore
@@ -1,2 +1,3 @@
+/bug00307
 /php_bug_67325
 /php_bug_72512
diff --git a/tests/gdimagetruecolortopalette/CMakeLists.txt b/tests/gdimagetruecolortopalette/CMakeLists.txt
index 44ea4ac..b23d2a1 100644
--- a/tests/gdimagetruecolortopalette/CMakeLists.txt
+++ b/tests/gdimagetruecolortopalette/CMakeLists.txt
@@ -1,4 +1,5 @@
 SET(TESTS_FILES
+	bug00307
 	php_bug_72512
 )
 
diff --git a/tests/gdimagetruecolortopalette/Makemodule.am b/tests/gdimagetruecolortopalette/Makemodule.am
index 96b1182..31f0362 100644
--- a/tests/gdimagetruecolortopalette/Makemodule.am
+++ b/tests/gdimagetruecolortopalette/Makemodule.am
@@ -1,5 +1,6 @@
 
 libgd_test_programs += \
+	gdimagetruecolortopalette/bug00307 \
 	gdimagetruecolortopalette/php_bug_72512
 
 if HAVE_LIBJPEG
diff --git a/tests/gdimagetruecolortopalette/bug00307.c b/tests/gdimagetruecolortopalette/bug00307.c
new file mode 100644
index 0000000..a5c6a04
--- /dev/null
+++ b/tests/gdimagetruecolortopalette/bug00307.c
@@ -0,0 +1,26 @@
+/**
+ * Regression test for <https://github.com/libgd/libgd/issues/307>
+ *
+ * We're testing that an image that has been converted to palette with
+ * GD_QUANT_NEUQUANT has its trueColor flag unset.
+ */
+
+ 
+#include "gd.h"
+#include "gdtest.h"
+
+
+int main()
+{
+	gdImagePtr im;
+
+	im = gdImageCreateTrueColor(100, 100);
+
+	gdTestAssert(gdImageTrueColorToPaletteSetMethod(im, GD_QUANT_NEUQUANT, 0));
+	gdImageTrueColorToPalette(im, 0, 256);
+	gdTestAssert(!gdImageTrueColor(im));
+
+	gdImageDestroy(im);
+
+	return gdNumFailures();
+}