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gimpwarptool: proof of concept code to act on the coords buffer

This commit is contained in:
Michael Muré 2011-05-25 21:40:47 +02:00 committed by Michael Natterer
parent 901a148760
commit 4f24f703ab
1 changed files with 46 additions and 0 deletions
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46
app/tools/gimpwarptool.c
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@ -100,6 +100,9 @@ static void gimp_warp_tool_create_image_map (GimpWarpTool *wt,
static void gimp_warp_tool_image_map_flush (GimpImageMap *image_map,
GimpTool *tool);
static void gimp_warp_tool_image_map_update (GimpWarpTool *wt);
static void gimp_warp_tool_act_on_coords (GimpWarpTool *wt,
gint x,
gint y);
G_DEFINE_TYPE (GimpWarpTool, gimp_warp_tool, GIMP_TYPE_DRAW_TOOL)
@ -346,6 +349,7 @@ gimp_warp_tool_button_press (GimpTool *tool,
if (display != tool->display)
gimp_warp_tool_start (wt, display);
gimp_warp_tool_act_on_coords (wt, coords->x, coords->y);
gimp_warp_tool_image_map_update (wt);
gimp_tool_control_activate (tool->control);
@ -494,3 +498,45 @@ gimp_warp_tool_image_map_update (GimpWarpTool *wt)
gimp_image_map_apply (wt->image_map, &visible);
}
static void
gimp_warp_tool_act_on_coords (GimpWarpTool *wt,
gint x,
gint y)
{
GeglBufferIterator *it;
Babl *format;
GeglRectangle area = {x - 30,
y - 30,
60,
60};
format = babl_format_n (babl_type ("float"), 2);
it = gegl_buffer_iterator_new (wt->coords_buffer, &area, format, GEGL_BUFFER_READWRITE);
while (gegl_buffer_iterator_next (it))
{
/* iterate inside the roi */
gint n_pixels = it->length;
gfloat *coords = it->data[0];
x = it->roi->x; /* initial x */
y = it->roi->y; /* and y coordinates */
while (n_pixels--)
{
coords[0] += 2;
coords[1] += 2;
coords += 2;
/* update x and y coordinates */
x++;
if (x >= (it->roi->x + it->roi->width))
{
x = it->roi->x;
y++;
}
}
}
}