change char local vars to signed char

this accomodates toolchains where char type is unsigned by default.
This commit is contained in:
Ozkan Sezer 2021-12-11 21:03:37 +03:00
parent 2ee2169e02
commit 8c77fad340

10
qoi.h
View File

@ -428,12 +428,12 @@ void *qoi_encode(const void *data, const qoi_desc *desc, int *out_len) {
index[index_pos] = px;
if (px.rgba.a == px_prev.rgba.a) {
char vr = px.rgba.r - px_prev.rgba.r;
char vg = px.rgba.g - px_prev.rgba.g;
char vb = px.rgba.b - px_prev.rgba.b;
signed char vr = px.rgba.r - px_prev.rgba.r;
signed char vg = px.rgba.g - px_prev.rgba.g;
signed char vb = px.rgba.b - px_prev.rgba.b;
char vg_r = vr - vg;
char vg_b = vb - vg;
signed char vg_r = vr - vg;
signed char vg_b = vb - vg;
if (
vr > -3 && vr < 2 &&