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devel-docs/gbr.txt applied a patch from Guillermo S. Romero that fixes 

2003-09-03  Sven Neumann  <sven@gimp.org>

	* devel-docs/gbr.txt
	* plug-ins/common/gbr.c: applied a patch from Guillermo S. Romero
	that fixes loading of v1 brushes and documents the difference
	to version 2 of the brush file format (bug #121304).
This commit is contained in:
Sven Neumann 2003-09-03 16:59:22 +00:00 committed by Sven Neumann
parent 157dc58571
commit 4a3740e8ed
3 changed files with 97 additions and 80 deletions
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7
ChangeLog
View File

@ -1,3 +1,10 @@
2003-09-03 Sven Neumann <sven@gimp.org>
* devel-docs/gbr.txt
* plug-ins/common/gbr.c: applied a patch from Guillermo S. Romero
that fixes loading of v1 brushes and documents the difference
to version 2 of the brush file format (bug #121304).
2003-09-03 Sven Neumann <sven@gimp.org>
* app/tools/gimpclonetool.c: Ctrl only sets the clone source when

14
devel-docs/gbr.txt
View File

@ -47,3 +47,17 @@ BODY
Type: uchar *
Value: Pixel values (row-first) for brush
The GIMP Paintbrush File Format Version 1 (.gbr)
------------------------------------------------
Based on examples and code, it seems that v1 is like v2, but it is
lacking bytes 20 - 27 (no magic or spacing info), and thus having
as last header field:
Bytes 20 - (header_size - 20):
Type: char *
Value: undefined encoding string - name of brush
GBR v1 is deprecated and should never be used to save new brushes.

156
plug-ins/common/gbr.c
View File

@ -2,17 +2,17 @@
* gbr plug-in version 1.00
* Loads/saves version 2 GIMP .gbr files, by Tim Newsome <drz@frody.bloke.com>
* Some bits stolen from the .99.7 source tree.
*
* Added in GBR version 1 support after learning that there wasn't a
* tool to read them.
*
* Added in GBR version 1 support after learning that there wasn't a
* tool to read them.
* July 6, 1998 by Seth Burgess <sjburges@gimp.org>
*
* Dec 17, 2000
* Load and save GIMP brushes in GRAY or RGBA. jtl + neo
*
*
*
* TODO: Give some better error reporting on not opening files/bad headers
* etc.
* etc.
*/
#include "config.h"
@ -60,9 +60,9 @@ typedef struct
gint spacing;
} t_info;
t_info info =
t_info info =
{ /* Initialize to this, change if non-interactive later */
"GIMP Brush",
"GIMP Brush",
10
};
@ -84,9 +84,9 @@ static gint save_image (const gchar *filename,
gint32 drawable_ID);
static gint save_dialog (void);
static void ok_callback (GtkWidget *widget,
static void ok_callback (GtkWidget *widget,
gpointer data);
static void entry_callback (GtkWidget *widget,
static void entry_callback (GtkWidget *widget,
gpointer data);
@ -184,11 +184,11 @@ run (const gchar *name,
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = GIMP_PDB_EXECUTION_ERROR;
if (strcmp (name, "file_gbr_load") == 0)
if (strcmp (name, "file_gbr_load") == 0)
{
image_ID = load_image (param[1].data.d_string);
if (image_ID != -1)
if (image_ID != -1)
{
*nreturn_vals = 2;
values[1].type = GIMP_PDB_IMAGE;
@ -199,18 +199,18 @@ run (const gchar *name,
status = GIMP_PDB_EXECUTION_ERROR;
}
}
else if (strcmp (name, "file_gbr_save") == 0)
else if (strcmp (name, "file_gbr_save") == 0)
{
image_ID = param[1].data.d_int32;
drawable_ID = param[2].data.d_int32;
/* eventually export the image */
/* eventually export the image */
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
case GIMP_RUN_WITH_LAST_VALS:
gimp_ui_init ("gbr", FALSE);
export = gimp_export_image (&image_ID, &drawable_ID, "GBR",
export = gimp_export_image (&image_ID, &drawable_ID, "GBR",
GIMP_EXPORT_CAN_HANDLE_GRAY |
GIMP_EXPORT_CAN_HANDLE_RGB |
GIMP_EXPORT_CAN_HANDLE_ALPHA);
@ -224,7 +224,7 @@ run (const gchar *name,
break;
}
switch (run_mode)
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
/* Possibly retrieve data */
@ -234,7 +234,7 @@ run (const gchar *name,
status = GIMP_PDB_CANCEL;
break;
case GIMP_RUN_NONINTERACTIVE:
case GIMP_RUN_NONINTERACTIVE:
/* FIXME - need a real GIMP_RUN_NONINTERACTIVE */
if (nparams != 7)
{
@ -243,7 +243,7 @@ run (const gchar *name,
else
{
info.spacing = (param[5].data.d_int32);
strncpy (info.description, param[6].data.d_string, 256);
strncpy (info.description, param[6].data.d_string, 256);
}
break;
@ -254,7 +254,7 @@ run (const gchar *name,
if (status == GIMP_PDB_SUCCESS)
{
if (save_image (param[3].data.d_string, image_ID, drawable_ID))
if (save_image (param[3].data.d_string, image_ID, drawable_ID))
{
gimp_set_data ("file_gbr_save", &info, sizeof(info));
}
@ -275,8 +275,8 @@ run (const gchar *name,
values[0].data.d_status = status;
}
static gint32
load_image (const gchar *filename)
static gint32
load_image (const gchar *filename)
{
gchar *temp;
gchar *name = NULL;
@ -287,14 +287,13 @@ load_image (const gchar *filename)
gint32 layer_ID;
GimpDrawable *drawable;
GimpPixelRgn pixel_rgn;
gint version_extra;
gint bn_size;
GimpImageBaseType base_type;
GimpImageType image_type;
fd = open (filename, O_RDONLY | _O_BINARY);
if (fd == -1)
if (fd == -1)
{
g_message (_("Can't open '%s':\n%s"),
filename, g_strerror (errno));
@ -305,7 +304,7 @@ load_image (const gchar *filename)
gimp_progress_init (temp);
g_free (temp);
if (read (fd, &bh, sizeof (bh)) != sizeof (bh))
if (read (fd, &bh, sizeof (bh)) != sizeof (bh))
{
close (fd);
return -1;
@ -319,27 +318,24 @@ load_image (const gchar *filename)
bh.bytes = g_ntohl (bh.bytes);
bh.magic_number = g_ntohl (bh.magic_number);
bh.spacing = g_ntohl (bh.spacing);
/* How much extra to add to the header seek - 1 needs a bit more */
version_extra = 0;
if (bh.version == 1)
if (bh.version == 1)
{
/* Version 1 didn't know about spacing */
/* Version 1 didn't know about spacing */
bh.spacing = 25;
/* And we need to rewind the handle a bit too */
/* And we need to rewind the handle, 4 due spacing and 4 due magic */
lseek (fd, -8, SEEK_CUR);
version_extra = 8;
bh.header_size += 8;
}
/* Version 1 didn't know about magic either */
if ((bh.version != 1 &&
if ((bh.version != 1 &&
(bh.magic_number != GBRUSH_MAGIC || bh.version != 2)) ||
bh.header_size <= sizeof (bh))
bh.header_size <= sizeof (bh))
{
close (fd);
return -1;
}
if ((bn_size = (bh.header_size - sizeof (bh))) > 0)
{
name = g_new (gchar, bn_size);
@ -355,13 +351,13 @@ load_image (const gchar *filename)
{
name = g_strdup (_("Unnamed"));
}
/* Now there's just raw data left. */
brush_buf = g_malloc (bh.width * bh.height * bh.bytes);
if (read (fd, brush_buf,
bh.width * bh.height * bh.bytes) != bh.width * bh.height * bh.bytes)
if (read (fd, brush_buf,
bh.width * bh.height * bh.bytes) != bh.width * bh.height * bh.bytes)
{
close (fd);
g_free (brush_buf);
@ -377,7 +373,7 @@ load_image (const gchar *filename)
/* For backwards-compatibility, check if a pattern follows.
The obsolete .gpb format did it this way. */
if (read (fd, &ph, sizeof(ph)) == sizeof(ph))
if (read (fd, &ph, sizeof(ph)) == sizeof(ph))
{
/* rearrange the bytes in each unsigned int */
ph.header_size = g_ntohl (ph.header_size);
@ -397,7 +393,7 @@ load_image (const gchar *filename)
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)
@ -416,10 +412,10 @@ load_image (const gchar *filename)
}
/*
* Create a new image of the proper size and
* Create a new image of the proper size and
* associate the filename with it.
*/
switch (bh.bytes)
{
case 1:
@ -438,20 +434,20 @@ load_image (const gchar *filename)
image_ID = gimp_image_new (bh.width, bh.height, base_type);
gimp_image_set_filename (image_ID, filename);
layer_ID = gimp_layer_new (image_ID, name,
bh.width, bh.height,
layer_ID = gimp_layer_new (image_ID, name,
bh.width, bh.height,
image_type, 100, GIMP_NORMAL_MODE);
gimp_image_add_layer (image_ID, layer_ID, 0);
g_free (name);
drawable = gimp_drawable_get (layer_ID);
gimp_pixel_rgn_init (&pixel_rgn, drawable,
0, 0, drawable->width, drawable->height,
gimp_pixel_rgn_init (&pixel_rgn, drawable,
0, 0, drawable->width, drawable->height,
TRUE, FALSE);
gimp_pixel_rgn_set_rect (&pixel_rgn, brush_buf,
gimp_pixel_rgn_set_rect (&pixel_rgn, brush_buf,
0, 0, bh.width, bh.height);
g_free (brush_buf);
@ -462,14 +458,14 @@ load_image (const gchar *filename)
gimp_drawable_flush (drawable);
gimp_progress_update (1.0);
return image_ID;
}
static gint
save_image (const gchar *filename,
gint32 image_ID,
gint32 drawable_ID)
static gint
save_image (const gchar *filename,
gint32 image_ID,
gint32 drawable_ID)
{
gint fd;
BrushHeader bh;
@ -479,7 +475,7 @@ save_image (const gchar *filename,
gint x;
GimpPixelRgn pixel_rgn;
gchar *temp;
if (gimp_drawable_type (drawable_ID) != GIMP_GRAY_IMAGE &&
gimp_drawable_type (drawable_ID) != GIMP_RGBA_IMAGE)
{
@ -488,8 +484,8 @@ save_image (const gchar *filename,
}
fd = open (filename, O_CREAT | O_TRUNC | O_WRONLY | _O_BINARY, 0644);
if (fd == -1)
if (fd == -1)
{
g_message (_("Can't open '%s' for writing:\n%s"),
filename, g_strerror (errno));
@ -499,12 +495,12 @@ save_image (const gchar *filename,
temp = g_strdup_printf (_("Saving %s:"), filename);
gimp_progress_init (temp);
g_free (temp);
drawable = gimp_drawable_get (drawable_ID);
gimp_pixel_rgn_init (&pixel_rgn, drawable,
0, 0, drawable->width, drawable->height,
gimp_pixel_rgn_init (&pixel_rgn, drawable,
0, 0, drawable->width, drawable->height,
FALSE, FALSE);
bh.header_size = g_htonl (sizeof (bh) + strlen (info.description) + 1);
bh.version = g_htonl (2);
bh.width = g_htonl (drawable->width);
@ -512,22 +508,22 @@ save_image (const gchar *filename,
bh.bytes = g_htonl (drawable->bpp);
bh.magic_number = g_htonl (GBRUSH_MAGIC);
bh.spacing = g_htonl (info.spacing);
if (write (fd, &bh, sizeof (bh)) != sizeof (bh))
if (write (fd, &bh, sizeof (bh)) != sizeof (bh))
{
close (fd);
return FALSE;
}
if (write (fd, info.description, strlen(info.description) + 1) !=
strlen (info.description) + 1)
strlen (info.description) + 1)
{
close(fd);
return FALSE;
}
buffer = g_malloc (drawable->width * drawable->bpp);
for (line = 0; line < drawable->height; line++)
for (line = 0; line < drawable->height; line++)
{
gimp_pixel_rgn_get_row (&pixel_rgn, buffer, 0, line, drawable->width);
@ -537,8 +533,8 @@ save_image (const gchar *filename,
buffer[x] = 255 - buffer[x];
}
if (write (fd, buffer,
drawable->width * drawable->bpp) != drawable->width * drawable->bpp)
if (write (fd, buffer,
drawable->width * drawable->bpp) != drawable->width * drawable->bpp)
{
g_free (buffer);
close (fd);
@ -547,13 +543,13 @@ save_image (const gchar *filename,
gimp_progress_update ((gdouble) line / (gdouble) drawable->height);
}
g_free (buffer);
g_free (buffer);
close (fd);
return TRUE;
}
static gint
static gint
save_dialog (void)
{
GtkWidget *dlg;
@ -606,25 +602,25 @@ save_dialog (void)
g_signal_connect (entry, "changed",
G_CALLBACK (entry_callback),
info.description);
gtk_widget_show (dlg);
gtk_main ();
gdk_flush ();
return run_flag;
}
static void
ok_callback (GtkWidget *widget,
static void
ok_callback (GtkWidget *widget,
gpointer data)
{
run_flag = TRUE;
gtk_widget_destroy (GTK_WIDGET (data));
}
static void
entry_callback (GtkWidget *widget,
static void
entry_callback (GtkWidget *widget,
gpointer data)
{
strncpy (info.description, gtk_entry_get_text (GTK_ENTRY (widget)), 256);