| /* |
| * 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; |
| const uint64_t src_argb_size = (uint64_t)src_width * src_height * 4; |
| const uint64_t dst_argb_size = (uint64_t)dst_width * dst_height * 4; |
| if (src_argb_size > (UINT64_MAX - dst_argb_size)) { |
| return -1; // Invalid size. |
| } |
| const uint64_t argb_size = src_argb_size + dst_argb_size; |
| if (argb_size < src_argb_size || argb_size < dst_argb_size || argb_size > SIZE_MAX) { |
| return -1; // Invalid size. |
| } |
| uint8_t* src_argb = (uint8_t*)malloc((size_t)argb_size); |
| if (!src_argb) { |
| return 1; // Out of memory runtime error. |
| } |
| uint8_t* dst_argb = src_argb + (size_t)src_argb_size; |
| |
| 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 |