COMMON: Added sail_scan_line()

HappySeaFox · Nov 9, 2023 · 3b5cdc8 · 3b5cdc8
1 parent 0edc7e2
commit 3b5cdc8
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diff --git a/src/sail-common/image.c b/src/sail-common/image.c
@@ -213,3 +213,12 @@ sail_status_t sail_mirror_horizontally(struct sail_image *image) {
 
     return SAIL_OK;
 }
+
+void* sail_scan_line(const struct sail_image *image, unsigned row) {
+
+    if (SAIL_UNLIKELY(image == NULL || image->pixels == NULL)) {
+        return NULL;
+    }
+
+    return (uint8_t *)image->pixels + image->bytes_per_line * row;
+}
diff --git a/src/sail-common/image.h b/src/sail-common/image.h
@@ -222,6 +222,12 @@ SAIL_EXPORT sail_status_t sail_mirror_vertically(struct sail_image *image);
  */
 SAIL_EXPORT sail_status_t sail_mirror_horizontally(struct sail_image *image);
 
+/*
+ * Returns the scan line at the given row.
+ * Return NULL if the image or its pixels is NULL.
+ */
+SAIL_EXPORT void* sail_scan_line(const struct sail_image *image, unsigned row);
+
 /* extern "C" */
 #ifdef __cplusplus
 }