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added support for loading cinepaint brushes (GIMP brush version 3).

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2003-11-05  Sven Neumann  <sven@gimp.org>

	* plug-ins/common/gbr.c: added support for loading cinepaint
	brushes (GIMP brush version 3).
This commit is contained in:
Sven Neumann 2003-11-05 22:39:36 +00:00 committed by Sven Neumann
parent 8990800bf3
commit 120b7c70fa
2 changed files with 112 additions and 51 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2003-11-05 Sven Neumann <sven@gimp.org>
* plug-ins/common/gbr.c: added support for loading cinepaint
brushes (GIMP brush version 3).
2003-11-05 Sven Neumann <sven@gimp.org>
* plug-ins/common/screenshot.c: rewrote clipping code using

158
plug-ins/common/gbr.c
View file

@ -290,6 +290,7 @@ load_image (const gchar *filename)
gint bn_size;
GimpImageBaseType base_type;
GimpImageType image_type;
gssize size;
fd = open (filename, O_RDONLY | _O_BINARY);
@ -319,21 +320,37 @@ load_image (const gchar *filename)
bh.magic_number = g_ntohl (bh.magic_number);
bh.spacing = g_ntohl (bh.spacing);
if (bh.version == 1)
switch (bh.version)
{
/* Version 1 didn't know about spacing */
case 1:
/* Version 1 didn't have a magic number and had no spacing */
bh.spacing = 25;
/* And we need to rewind the handle, 4 due spacing and 4 due magic */
lseek (fd, -8, SEEK_CUR);
bh.header_size += 8;
}
/* Version 1 didn't know about magic either */
if ((bh.version != 1 &&
(bh.magic_number != GBRUSH_MAGIC || bh.version != 2)) ||
bh.header_size <= sizeof (bh))
{
close (fd);
return -1;
break;
case 3: /* cinepaint brush */
if (bh.bytes == 18 /* FLOAT16_GRAY_GIMAGE */)
{
bh.bytes = 2;
}
else
{
g_message (_("Unsupported brush format"));
close (fd);
return -1;
}
/* fallthrough */
case 2:
if (bh.magic_number != GBRUSH_MAGIC || bh.header_size <= sizeof (bh))
{
close (fd);
return -1;
}
break;
}
if ((bn_size = (bh.header_size - sizeof (bh))) > 0)
@ -354,10 +371,10 @@ load_image (const gchar *filename)
/* Now there's just raw data left. */
brush_buf = g_malloc (bh.width * bh.height * bh.bytes);
size = bh.width * bh.height * bh.bytes;
brush_buf = g_malloc (size);
if (read (fd, brush_buf,
bh.width * bh.height * bh.bytes) != bh.width * bh.height * bh.bytes)
if (read (fd, brush_buf, size) != size)
{
close (fd);
g_free (brush_buf);
@ -366,49 +383,87 @@ load_image (const gchar *filename)
}
if (bh.bytes == 1)
switch (bh.bytes)
{
PatternHeader ph;
case 1:
{
PatternHeader ph;
/* For backwards-compatibility, check if a pattern follows.
The obsolete .gpb format did it this way. */
/* For backwards-compatibility, check if a pattern follows.
The obsolete .gpb format did it this way. */
if (read (fd, &ph, sizeof(ph)) == sizeof(ph))
{
/* rearrange the bytes in each unsigned int */
ph.header_size = g_ntohl (ph.header_size);
ph.version = g_ntohl (ph.version);
ph.width = g_ntohl (ph.width);
ph.height = g_ntohl (ph.height);
ph.bytes = g_ntohl (ph.bytes);
ph.magic_number = g_ntohl (ph.magic_number);
if (read (fd, &ph, sizeof(ph)) == sizeof(ph))
{
/* rearrange the bytes in each unsigned int */
ph.header_size = g_ntohl (ph.header_size);
ph.version = g_ntohl (ph.version);
ph.width = g_ntohl (ph.width);
ph.height = g_ntohl (ph.height);
ph.bytes = g_ntohl (ph.bytes);
ph.magic_number = g_ntohl (ph.magic_number);
if (ph.magic_number == GPATTERN_MAGIC && ph.version == 1 &&
ph.header_size > sizeof (ph) &&
ph.bytes == 3 && ph.width == bh.width && ph.height == bh.height &&
lseek (fd, ph.header_size - sizeof (ph), SEEK_CUR) > 0)
{
guchar *plain_brush = brush_buf;
gint i;
if (ph.magic_number == GPATTERN_MAGIC &&
ph.version == 1 &&
ph.header_size > sizeof (ph) &&
ph.bytes == 3 &&
ph.width == bh.width &&
ph.height == bh.height &&
lseek (fd, ph.header_size - sizeof (ph), SEEK_CUR) > 0)
{
guchar *plain_brush = brush_buf;
gint i;
bh.bytes = 4;
brush_buf = g_malloc (4 * bh.width * bh.height);
bh.bytes = 4;
brush_buf = g_malloc (4 * bh.width * bh.height);
for (i = 0; i < ph.width * ph.height; i++)
{
if (read (fd, brush_buf + i * 4, 3) != 3)
{
close (fd);
g_free (name);
g_free (plain_brush);
g_free (brush_buf);
return -1;
}
brush_buf[i * 4 + 3] = plain_brush[i];
}
g_free (plain_brush);
}
}
for (i = 0; i < ph.width * ph.height; i++)
{
if (read (fd, brush_buf + i * 4, 3) != 3)
{
close (fd);
g_free (name);
g_free (plain_brush);
g_free (brush_buf);
return -1;
}
brush_buf[i * 4 + 3] = plain_brush[i];
}
g_free (plain_brush);
}
}
}
break;
case 2: /* cinepaint brush (16 bit floats) -- convert to 8bit */
{
guint16 *buf = (guint16 *) brush_buf;
gint i;
for (i = 0; i < bh.width * bh.height; i++, buf++)
{
union
{
guint16 u[2];
gfloat f;
} short_float;
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
short_float.u[0] = 0;
short_float.u[1] = GUINT16_FROM_BE (*buf);
#else
short_float.u[0] = GUINT16_FROM_BE (*buf);
short_float.u[1] = 0;
#endif
brush_buf[i] = (guchar) (short_float.f *= 255.9999);
}
bh.bytes = 1;
}
break;
default:
break;
}
/*
@ -427,7 +482,8 @@ load_image (const gchar *filename)
image_type = GIMP_RGBA_IMAGE;
break;
default:
g_message ("Unsupported brush depth: %d\nGIMP Brushes must be GRAY or RGBA\n",
g_message ("Unsupported brush depth: %d\n"
"GIMP Brushes must be GRAY or RGBA\n",
bh.bytes);
return -1;
}