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Thumbnails save with checkerboard-alpha. Saved thumbnail comments include 

Tue Mar 30 22:17:43 BST 1999  Adam D. Moss  <adam@gimp.org>

	* app/fileops.c: Thumbnails save with checkerboard-alpha.
	Saved thumbnail comments include the file size.
This commit is contained in:
BST 1999 Adam D. Moss 1999-03-30 21:24:50 +00:00 committed by Adam D. Moss
parent f6b28a873b
commit 303976487f
2 changed files with 40 additions and 11 deletions
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5
ChangeLog
View File

@ -1,3 +1,8 @@
Tue Mar 30 22:17:43 BST 1999 Adam D. Moss <adam@gimp.org>
* app/fileops.c: Thumbnails save with checkerboard-alpha.
Saved thumbnail comments include the file size.
Tue Mar 30 20:50:21 BST 1999 Adam D. Moss <adam@gimp.org>
* plug-ins/gif/gif.c:

46
app/fileops.c
View File

@ -989,6 +989,12 @@ file_save_thumbnail (GimpImage* gimage,
gint w,h;
GimpImageBaseType basetype;
FILE* fp;
struct stat statbuf;
if (stat(full_source_filename, &statbuf) != 0)
{
return FALSE;
}
if (gimp_image_preview_valid (gimage, Gray))
{
@ -1053,13 +1059,15 @@ file_save_thumbnail (GimpImage* gimage,
basetype = gimp_image_base_type(gimage);
fprintf(fp,
"P7 332\n#IMGINFO:%dx%d %s\n"
"P7 332\n#IMGINFO:%dx%d %s (%d %s)\n"
"#END_OF_COMMENTS\n%d %d 255\n",
gimage->width, gimage->height,
(basetype == RGB) ? "RGB" :
(basetype == GRAY) ? "Greyscale" :
(basetype == INDEXED) ? "Indexed" :
"(UNKNOWN COLOUR TYPE)",
(int)statbuf.st_size,
(statbuf.st_size == 1) ? "byte" : "bytes",
w, h);
switch (basetype)
@ -1069,16 +1077,27 @@ file_save_thumbnail (GimpImage* gimage,
for (i=0; i<h; i++)
{
/* Do a cheap unidirectional error-spread to look better */
gint rerr=0, gerr=0, berr=0;
gint rerr=0, gerr=0, berr=0, a;
for (j=0; j<w; j++)
{
gint32 r,g,b;
r = *(tbd++) + rerr;
g = *(tbd++) + gerr;
b = *(tbd++) + berr;
tbd++;
if (128 & *(tbd + 3))
{
r = *(tbd++) + rerr;
g = *(tbd++) + gerr;
b = *(tbd++) + berr;
tbd++;
}
else
{
a = (( (i^j) & 4 ) << 5) | 64; /* cute. */
r = a + rerr;
g = a + gerr;
b = a + berr;
tbd += 4;
}
r = CLAMP0255 (r);
g = CLAMP0255 (g);
@ -1096,14 +1115,18 @@ file_save_thumbnail (GimpImage* gimage,
for (i=0; i<h; i++)
{
/* Do a cheap unidirectional error-spread to look better */
gint b3err=0, b2err=0, v;
gint b3err=0, b2err=0, v, a;
for (j=0; j<w; j++)
{
gint32 b3, b2;
v = *(tbd++);
tbd++;
a = *(tbd++);
if (!(128 & a))
v = (( (i^j) & 4 ) << 5) | 64;
b2 = v + b2err;
b3 = v + b3err;
@ -2031,8 +2054,9 @@ file_check_single_magic (char *offset,
fileval = 0;
if (numbytes == 5) /* Check for file size ? */
{struct stat buf;
{
struct stat buf;
if (fstat (fileno (ifp), &buf) < 0) return (0);
fileval = buf.st_size;
}