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enc-util: Add function to calculate region area

pull/83/head
Andri Yngvason 2022-11-05 13:52:55 +00:00
parent 3647457f6d
commit f31ddf7fe9
2 changed files with 23 additions and 2 deletions
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4
include/enc-util.h
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2019 - 2020 Andri Yngvason
* Copyright (c) 2019 - 2022 Andri Yngvason
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@ -21,7 +21,9 @@
#include <stdint.h>
struct vec;
struct pixman_region16;
int encode_rect_head(struct vec* dst, enum rfb_encodings encoding,
uint32_t x, uint32_t y, uint32_t width, uint32_t height);
uint32_t calc_bytes_per_cpixel(const struct rfb_pixel_format* fmt);
uint32_t calculate_region_area(struct pixman_region16* region);

21
src/enc-util.c
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2019 - 2020 Andri Yngvason
* Copyright (c) 2019 - 2022 Andri Yngvason
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@ -19,6 +19,8 @@
#include "vec.h"
#include <arpa/inet.h>
#include <stdint.h>
#include <pixman.h>
#define UDIV_UP(a, b) (((a) + (b) - 1) / (b))
@ -41,3 +43,20 @@ uint32_t calc_bytes_per_cpixel(const struct rfb_pixel_format* fmt)
return fmt->bits_per_pixel == 32 ? UDIV_UP(fmt->depth, 8)
: UDIV_UP(fmt->bits_per_pixel, 8);
}
uint32_t calculate_region_area(struct pixman_region16* region)
{
uint32_t area = 0;
int n_rects = 0;
struct pixman_box16* rects = pixman_region_rectangles(region,
&n_rects);
for (int i = 0; i < n_rects; ++i) {
int width = rects[i].x2 - rects[i].x1;
int height = rects[i].y2 - rects[i].y1;
area += width * height;
}
return area;
}