1 files changed, 66 insertions, 0 deletions
diff --git a/source/scale_rgb.cc b/source/scale_rgb.cc
new file mode 100644
index 00000000..8db59b56
--- /dev/null
+++ b/source/scale_rgb.cc
@@ -0,0 +1,66 @@
+/*
+ *  Copyright 2022 The LibYuv Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS. All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "libyuv/scale.h" /* For FilterMode */
+
+#include <assert.h>
+#include <string.h>
+
+#include "libyuv/convert_argb.h"
+#include "libyuv/convert_from_argb.h"
+#include "libyuv/row.h"
+#include "libyuv/scale_argb.h"
+#include "libyuv/scale_rgb.h"
+
+#ifdef __cplusplus
+namespace libyuv {
+extern "C" {
+#endif
+
+// Scale a 24 bit image.
+// Converts to ARGB as intermediate step
+
+LIBYUV_API
+int RGBScale(const uint8_t* src_rgb,
+             int src_stride_rgb,
+             int src_width,
+             int src_height,
+             uint8_t* dst_rgb,
+             int dst_stride_rgb,
+             int dst_width,
+             int dst_height,
+             enum FilterMode filtering) {
+  int r;
+  uint8_t* src_argb =
+      (uint8_t*)malloc(src_width * src_height * 4 + dst_width * dst_height * 4);
+  uint8_t* dst_argb = src_argb + src_width * src_height * 4;
+
+  if (!src_argb) {
+    return 1;
+  }
+
+  r = RGB24ToARGB(src_rgb, src_stride_rgb, src_argb, src_width * 4, src_width,
+                  src_height);
+  if (!r) {
+    r = ARGBScale(src_argb, src_width * 4, src_width, src_height, dst_argb,
+                  dst_width * 4, dst_width, dst_height, filtering);
+    if (!r) {
+      r = ARGBToRGB24(dst_argb, dst_width * 4, dst_rgb, dst_stride_rgb,
+                      dst_width, dst_height);
+    }
+  }
+  free(src_argb);
+  return r;
+}
+
+#ifdef __cplusplus
+}  // extern "C"
+}  // namespace libyuv
+#endif