#788 fix bug in HEIF usage, stride is require (#801)

fix bug #788 in HEIF usage, stride is require

3 files changed, 44 insertions, 0 deletions

diff --git a/tests/heif/CMakeLists.txt b/tests/heif/CMakeLists.txt
index 4a41528..a45b957 100644
--- a/tests/heif/CMakeLists.txt
+++ b/tests/heif/CMakeLists.txt
@@ -5,6 +5,7 @@ LIST(APPEND TESTS_FILES
 	heif_null
 	heif_ptr_double_free
 	heif_read
+	bug788
 )
 ENDIF(HEIF_FOUND)
 
diff --git a/tests/heif/bug788.c b/tests/heif/bug788.c
new file mode 100644
index 0000000..5475251
--- /dev/null
+++ b/tests/heif/bug788.c
@@ -0,0 +1,43 @@
+/**
+ * Bug 788 stride not implemented.
+ */
+
+#include "gd.h"
+#include "gdtest.h"
+
+#include <libheif/heif.h>
+
+int main () {
+	FILE *fp;
+	gdImagePtr in;
+    gdImagePtr dst;
+    gdImagePtr diff;
+    int size;
+    void *data;
+    CuTestImageResult result = {0, 0};
+    fp = gdTestFileOpen2("heif", "bug788.png");
+    in = gdImageCreateFromPng(fp);
+    fclose(fp);
+    fp = fopen("1.png", "wb");
+    gdImagePng(in, fp);
+    fclose(fp);
+    data = gdImageHeifPtrEx(in, &size, 200, GD_HEIF_CODEC_HEVC, GD_HEIF_CHROMA_444);
+
+    dst = gdImageCreateFromHeifPtr(size, data);
+    diff = gdImageCreateTrueColor(gdImageSX(dst), gdImageSY(dst));
+    if (gdTestAssertMsg(dst != NULL, "cannot compare with NULL buffer")) {
+        gdTestImageDiff(in, dst, diff, &result);
+    }
+    fp = fopen("2.png", "wb");
+    gdImageHeif(dst, fp);
+    fclose(fp);
+    fp = fopen("3.png", "wb");
+    gdImagePng(diff, fp);
+    fclose(fp);
+    /* colorspace conversion cannot avoid colors differences, even if we use the same format/colorspace for in and out */
+    gdTestAssertMsg(result.pixels_changed > 30, "pixels changed: %d\n", result.pixels_changed);
+    gdImageDestroy(dst);
+    gdImageDestroy(in);
+    gdImageDestroy(diff);
+    return 0;
+}
\ No newline at end of file
diff --git a/tests/heif/bug788.png b/tests/heif/bug788.png
new file mode 100644
index 0000000..953ef6e
--- /dev/null
+++ b/tests/heif/bug788.png