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Fix off-by-one when dragging the selection. Fixes the last pending issue 

2003-05-26  Pedro Gimeno  <pggimeno@wanadoo.es>

	* app/tools/gimpeditselectiontool.c (selection_transform_segs):
	Fix off-by-one when dragging the selection. Fixes the last pending
	issue of bug #17904. Use temporary variables for clamp values.

	* app/display/gimpdisplayshell-selection.c
	(selection_transform_segs): Perform the clamping that fixes
	bug #110014 here instead of in the callers. Solves a rare case
	that was not properly handled before.
	(selection_render_points, selection_generate_segs): Remove the
	clamping code from here.

	* app/tools/gimpdrawtool.c (gimp_draw_tool_draw_rectangle): More
	clampings to avoid overflow of 16-bit coordinates.
This commit is contained in:
Pedro Gimeno 2003-05-25 23:23:34 +00:00 committed by Pedro Gimeno Fortea
parent f45b47f49b
commit 2f31d12f86
4 changed files with 76 additions and 49 deletions
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16
ChangeLog
View File

@ -1,3 +1,19 @@
2003-05-26 Pedro Gimeno <pggimeno@wanadoo.es>
* app/tools/gimpeditselectiontool.c (selection_transform_segs):
Fix off-by-one when dragging the selection. Fixes the last pending
issue of bug #17904. Use temporary variables for clamp values.
* app/display/gimpdisplayshell-selection.c
(selection_transform_segs): Perform the clamping that fixes
bug #110014 here instead of in the callers. Solves a rare case
that was not properly handled before.
(selection_render_points, selection_generate_segs): Remove the
clamping code from here.
* app/tools/gimpdrawtool.c (gimp_draw_tool_draw_rectangle): More
clampings to avoid overflow of 16-bit coordinates.
2003-05-25 Maurits Rijk <lpeek.mrijk@consunet.nl>
* plug-ins/imagemap/imap_csim_parse.[ch]: regenerated

72
app/display/gimpdisplayshell-selection.c
View File

@ -486,14 +486,10 @@ selection_render_points (Selection *select)
gint dx, dy;
gint dxa, dya;
gint r;
gint xsize, ysize;
gint x2, y2;
if (select->segs_in == NULL)
return;
g_return_if_fail (select->shell != NULL);
for (j = 0; j < 8; j++)
{
max_npoints[j] = MAX_POINTS_INC;
@ -501,9 +497,6 @@ selection_render_points (Selection *select)
select->num_points_in[j] = 0;
}
xsize = select->shell->disp_width;
ysize = select->shell->disp_height;
for (i = 0; i < select->num_segs_in; i++)
{
#ifdef VERBOSE
@ -513,9 +506,8 @@ selection_render_points (Selection *select)
select->segs_in[i].x2,
select->segs_in[i].y2);
#endif
x = CLAMP (select->segs_in[i].x1, -1, xsize);
x2 = CLAMP (select->segs_in[i].x2, -1, xsize);
dxa = x2 - x;
x = select->segs_in[i].x1;
dxa = select->segs_in[i].x2 - x;
if (dxa > 0)
{
dx = 1;
@ -525,9 +517,8 @@ selection_render_points (Selection *select)
dxa = -dxa;
dx = -1;
}
y = CLAMP (select->segs_in[i].y1, -1, ysize);
y2 = CLAMP (select->segs_in[i].y2, -1, ysize);
dya = y2 - y;
y = select->segs_in[i].y1;
dya = select->segs_in[i].y2 - y;
if (dya > 0)
{
dy = 1;
@ -551,7 +542,7 @@ selection_render_points (Selection *select)
y += dy;
r -= (dxa << 1);
}
} while (x != x2);
} while (x != select->segs_in[i].x2);
}
else if (dxa < dya)
{
@ -567,7 +558,7 @@ selection_render_points (Selection *select)
x += dx;
r -= (dya << 1);
}
} while (y != y2);
} while (y != select->segs_in[i].y2);
}
else
selection_add_point (select->points_in,
@ -645,6 +636,10 @@ selection_transform_segs (Selection *select,
{
gint x, y;
gint i;
gint xclamp, yclamp;
xclamp = select->shell->disp_width + 1;
yclamp = select->shell->disp_height + 1;
for (i = 0; i < num_segs; i++)
{
@ -653,16 +648,16 @@ selection_transform_segs (Selection *select,
&x, &y,
FALSE);
dest_segs[i].x1 = x;
dest_segs[i].y1 = y;
dest_segs[i].x1 = CLAMP (x, -1, xclamp);
dest_segs[i].y1 = CLAMP (y, -1, yclamp);
gimp_display_shell_transform_xy (select->shell,
src_segs[i].x2, src_segs[i].y2,
&x, &y,
FALSE);
dest_segs[i].x2 = x;
dest_segs[i].y2 = y;
dest_segs[i].x2 = CLAMP (x, -1, xclamp);
dest_segs[i].y2 = CLAMP (y, -1, yclamp);
/* If this segment is a closing segment && the segments lie inside
* the region, OR if this is an opening segment and the segments
@ -670,19 +665,19 @@ selection_transform_segs (Selection *select,
* we need to transform it by one display pixel
*/
if (!src_segs[i].open)
{
/* If it is vertical */
if (dest_segs[i].x1 == dest_segs[i].x2)
{
dest_segs[i].x1 -= 1;
dest_segs[i].x2 -= 1;
}
else
{
dest_segs[i].y1 -= 1;
dest_segs[i].y2 -= 1;
}
}
{
/* If it is vertical */
if (dest_segs[i].x1 == dest_segs[i].x2)
{
dest_segs[i].x1 -= 1;
dest_segs[i].x2 -= 1;
}
else
{
dest_segs[i].y1 -= 1;
dest_segs[i].y2 -= 1;
}
}
}
}
@ -733,22 +728,9 @@ selection_generate_segs (Selection *select)
if (select->num_segs_layer)
{
gint i;
GdkSegment *seg;
select->segs_layer = g_new (GdkSegment, select->num_segs_layer);
selection_transform_segs (select, segs_layer, select->segs_layer,
select->num_segs_layer);
seg = select->segs_layer;
for (i = 0; i < select->num_segs_layer; i++)
{
seg->x1 = CLAMP (seg->x1, -1, select->shell->disp_width);
seg->y1 = CLAMP (seg->y1, -1, select->shell->disp_height);
seg->x2 = CLAMP (seg->x2, -1, select->shell->disp_width);
seg->y2 = CLAMP (seg->y2, -1, select->shell->disp_height);
seg++;
}
}
else
{

5
app/tools/gimpdrawtool.c
View File

@ -385,6 +385,11 @@ gimp_draw_tool_draw_rectangle (GimpDrawTool *draw_tool,
&tx2, &ty2,
use_offsets);
tx1 = CLAMP (tx1, -1, shell->disp_width + 1);
ty1 = CLAMP (ty1, -1, shell->disp_height + 1);
tx2 = CLAMP (tx2, -1, shell->disp_width + 1);
ty2 = CLAMP (ty2, -1, shell->disp_height + 1);
tx2 -= tx1;
ty2 -= ty1;
w = (tx2 >= 0.0) ? RINT (tx2) : 0;

32
app/tools/gimpeditselectiontool.c
View File

@ -666,9 +666,13 @@ selection_transform_segs (GimpEditSelectionTool *edit_select,
GimpDisplayShell *shell;
gint x, y;
gint i;
gint xclamp, yclamp;
shell = GIMP_DISPLAY_SHELL (GIMP_TOOL (edit_select)->gdisp->shell);
xclamp = shell->disp_width + 1;
yclamp = shell->disp_height + 1;
for (i = 0; i < num_segs; i++)
{
gimp_display_shell_transform_xy (shell,
@ -677,8 +681,8 @@ selection_transform_segs (GimpEditSelectionTool *edit_select,
&x, &y,
FALSE);
dest_segs[i].x1 = CLAMP (x, -1, shell->disp_width);
dest_segs[i].y1 = CLAMP (y, -1, shell->disp_height);
dest_segs[i].x1 = CLAMP (x, -1, xclamp);
dest_segs[i].y1 = CLAMP (y, -1, yclamp);
gimp_display_shell_transform_xy (shell,
src_segs[i].x2 + edit_select->cumlx,
@ -686,8 +690,28 @@ selection_transform_segs (GimpEditSelectionTool *edit_select,
&x, &y,
FALSE);
dest_segs[i].x2 = CLAMP (x, -1, shell->disp_width);
dest_segs[i].y2 = CLAMP (y, -1, shell->disp_height);
dest_segs[i].x2 = CLAMP (x, -1, xclamp);
dest_segs[i].y2 = CLAMP (y, -1, yclamp);
/* If this segment is a closing segment && the segments lie inside
* the region, OR if this is an opening segment and the segments
* lie outside the region...
* we need to transform it by one display pixel
*/
if (!src_segs[i].open)
{
/* If it is vertical */
if (dest_segs[i].x1 == dest_segs[i].x2)
{
dest_segs[i].x1 -= 1;
dest_segs[i].x2 -= 1;
}
else
{
dest_segs[i].y1 -= 1;
dest_segs[i].y2 -= 1;
}
}
}
}