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/*
* 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 <limits.h>
#include <stdint.h>
#include <stdlib.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;
if (!src_rgb || !dst_rgb || src_width <= 0 || src_width > INT_MAX / 4 ||
src_height == 0 || dst_width <= 0 || dst_width > INT_MAX / 4 ||
dst_height <= 0) {
return -1;
}
const int abs_src_height = (src_height < 0) ? -src_height : src_height;
const uint64_t src_argb_size = (uint64_t)src_width * abs_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 > 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, abs_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
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