63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
/*
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* Copyright (c) 2019 - 2022 Andri Yngvason
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "enc-util.h"
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#include "rfb-proto.h"
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#include "vec.h"
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#include <arpa/inet.h>
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#include <stdint.h>
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#include <pixman.h>
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#define UDIV_UP(a, b) (((a) + (b) - 1) / (b))
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int encode_rect_head(struct vec* dst, enum rfb_encodings encoding,
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uint32_t x, uint32_t y, uint32_t width, uint32_t height)
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{
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struct rfb_server_fb_rect head = {
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.encoding = htonl(encoding),
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.x = htons(x),
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.y = htons(y),
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.width = htons(width),
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.height = htons(height),
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};
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return vec_append(dst, &head, sizeof(head));
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}
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uint32_t calc_bytes_per_cpixel(const struct rfb_pixel_format* fmt)
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{
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return fmt->bits_per_pixel == 32 ? UDIV_UP(fmt->depth, 8)
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: UDIV_UP(fmt->bits_per_pixel, 8);
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}
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uint32_t calculate_region_area(struct pixman_region16* region)
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{
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uint32_t area = 0;
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int n_rects = 0;
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struct pixman_box16* rects = pixman_region_rectangles(region,
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&n_rects);
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for (int i = 0; i < n_rects; ++i) {
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int width = rects[i].x2 - rects[i].x1;
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int height = rects[i].y2 - rects[i].y1;
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area += width * height;
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}
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return area;
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}
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