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R_Screenshot(): Write "yq2" image ID

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because we can.
This should hopefully work around problems in old versions of gdk-pixbuf
that mistook TGAs without image ID as microsoft .ICO
This commit is contained in:
Daniel Gibson 2015-02-28 21:26:13 +01:00
parent d60dfa63bc
commit 6983d5dc3c
1 changed files with 12 additions and 4 deletions
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16
src/client/refresh/r_misc.c
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@ -121,7 +121,9 @@ R_ScreenShot(void)
return;
}
c = 18 + vid.width * vid.height * 3;
static const int headerLength = 18+4;
c = headerLength + vid.width * vid.height * 3;
buffer = malloc(c);
if (!buffer)
@ -130,20 +132,26 @@ R_ScreenShot(void)
return;
}
memset(buffer, 0, 18);
memset(buffer, 0, headerLength);
buffer[0] = 4; // image ID: "yq2\0"
buffer[2] = 2; /* uncompressed type */
buffer[12] = vid.width & 255;
buffer[13] = vid.width >> 8;
buffer[14] = vid.height & 255;
buffer[15] = vid.height >> 8;
buffer[16] = 24; /* pixel size */
buffer[17] = 0; // image descriptor
buffer[18] = 'y'; // following: the 4 image ID fields
buffer[19] = 'q';
buffer[20] = '2';
buffer[21] = '\0';
glPixelStorei(GL_PACK_ALIGNMENT, 1);
glReadPixels(0, 0, vid.width, vid.height, GL_RGB,
GL_UNSIGNED_BYTE, buffer + 18);
GL_UNSIGNED_BYTE, buffer + headerLength);
/* swap rgb to bgr */
for (i = 18; i < c; i += 3)
for (i = headerLength; i < c; i += 3)
{
temp = buffer[i];
buffer[i] = buffer[i + 2];