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clipboard: tidy up bmp file header assembly 

Sponsored by:   Krämer Pferdesport GmbH & Co KG

(cherry picked from commit e070902310)
This commit is contained in:
Koichiro Iwao 2024-06-17 23:57:58 +00:00
parent 57cf5c19b7
commit a6199e8510
No known key found for this signature in database
GPG Key ID: 03993B4065E7193B
1 changed files with 23 additions and 28 deletions
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51
sesman/chansrv/clipboard.c
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@ -181,22 +181,8 @@ x-special/gnome-copied-files
#include "ms-rdpeclip.h"
#include "xrdp_constants.h"
static char g_bmp_image_header[] =
{
/*
* Bitmap file header
* https://en.wikipedia.org/wiki/BMP_file_format#Bitmap_file_header
*
* NOTE: All of the integer values are stored in little-endian format
*/
0x42, 0x4d, /* signature */
0x00, 0x00, 0x00, 0x00, /* file size, to be filled later */
0x00, 0x00, /* reserved 1 */
0x00, 0x00, /* reserved 2 */
0x36, 0x00, 0x00, 0x00 /* offset to pixel array (14 + 40 bytes) */
};
#define BMPFILEHEADER_LEN sizeof(g_bmp_image_header)
#define BMPFILEHEADER_LEN 14
#define BMPINFOHEADER_LEN 40
extern int g_cliprdr_chan_id; /* in chansrv.c */
@ -1143,8 +1129,7 @@ clipboard_process_data_response_for_image(struct stream *s,
{
XSelectionRequestEvent *lxev;
int len;
char bmp_file_header[BMPFILEHEADER_LEN] = { 0 };
uint32_t bmp_size; /* file size stored in bmp file header */
struct stream *bmp_hs;
LOG_DEVEL(LOG_LEVEL_DEBUG, "clipboard_process_data_response_for_image: "
"CLIPRDR_DATA_RESPONSE_FOR_IMAGE");
@ -1169,20 +1154,30 @@ clipboard_process_data_response_for_image(struct stream *s,
g_clip_c2s.total_bytes = len + BMPFILEHEADER_LEN;
g_clip_c2s.read_bytes_done = g_clip_c2s.total_bytes;
/* assemble bmp header */
g_memcpy(bmp_file_header, g_bmp_image_header, BMPFILEHEADER_LEN);
bmp_size = (uint32_t) g_clip_c2s.total_bytes;
#if defined(L_ENDIAN)
for (int i = 2, j = 0; i < 6; i++, j += 8)
#else
for (int i = 5, j = 0; i >= 2; i--, j += 8)
#endif
/*
* Assemble bitmap file header
* https://en.wikipedia.org/wiki/BMP_file_format#Bitmap_file_header
*/
make_stream(bmp_hs);
if (bmp_hs == 0)
{
bmp_file_header[i] = ((bmp_size >> j) & 0xff);
g_free(g_clip_c2s.data);
g_clip_c2s.total_bytes = 0;
return 0;
}
init_stream(bmp_hs, BMPFILEHEADER_LEN);
out_uint8(bmp_hs, 'B');
out_uint8(bmp_hs, 'M');
out_uint32_le(bmp_hs, g_clip_c2s.total_bytes);
out_uint16_le(bmp_hs, 0);
out_uint16_le(bmp_hs, 0);
out_uint32_le(bmp_hs, BMPFILEHEADER_LEN + BMPINFOHEADER_LEN);
g_memcpy(g_clip_c2s.data, bmp_file_header, BMPFILEHEADER_LEN);
/* Copy header and data to output stream */
g_memcpy(g_clip_c2s.data, bmp_hs->data, BMPFILEHEADER_LEN);
in_uint8a(s, g_clip_c2s.data + BMPFILEHEADER_LEN, len);
free_stream(bmp_hs);
LOG_DEVEL(LOG_LEVEL_DEBUG, "clipboard_process_data_response_for_image: calling "
"clipboard_provide_selection_c2s");
clipboard_provide_selection_c2s(lxev, lxev->target);