1 /*
2 * Copyright 2022 The LibYuv Project Authors. All rights reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include "libyuv/scale.h" /* For FilterMode */
12
13 #include <assert.h>
14 #include <string.h>
15
16 #include "libyuv/convert_argb.h"
17 #include "libyuv/convert_from_argb.h"
18 #include "libyuv/row.h"
19 #include "libyuv/scale_argb.h"
20 #include "libyuv/scale_rgb.h"
21
22 #ifdef __cplusplus
23 namespace libyuv {
24 extern "C" {
25 #endif
26
27 // Scale a 24 bit image.
28 // Converts to ARGB as intermediate step
29
30 LIBYUV_API
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)31 int RGBScale(const uint8_t* src_rgb,
32 int src_stride_rgb,
33 int src_width,
34 int src_height,
35 uint8_t* dst_rgb,
36 int dst_stride_rgb,
37 int dst_width,
38 int dst_height,
39 enum FilterMode filtering) {
40 int r;
41 uint8_t* src_argb =
42 (uint8_t*)malloc(src_width * src_height * 4 + dst_width * dst_height * 4);
43 uint8_t* dst_argb = src_argb + src_width * src_height * 4;
44
45 if (!src_argb) {
46 return 1;
47 }
48
49 r = RGB24ToARGB(src_rgb, src_stride_rgb, src_argb, src_width * 4, src_width,
50 src_height);
51 if (!r) {
52 r = ARGBScale(src_argb, src_width * 4, src_width, src_height, dst_argb,
53 dst_width * 4, dst_width, dst_height, filtering);
54 if (!r) {
55 r = ARGBToRGB24(dst_argb, dst_width * 4, dst_rgb, dst_stride_rgb,
56 dst_width, dst_height);
57 }
58 }
59 free(src_argb);
60 return r;
61 }
62
63 #ifdef __cplusplus
64 } // extern "C"
65 } // namespace libyuv
66 #endif
67