static TempBuf *
gimp_brush_generated_scale_mask (GimpBrush *gbrush,
gdouble scale)
{
GimpBrushGenerated *brush = GIMP_BRUSH_GENERATED (gbrush);
return gimp_brush_generated_calc (brush,
brush->shape,
brush->radius * scale,
brush->spikes,
brush->hardness,
brush->aspect_ratio,
brush->angle,
NULL, NULL);
}
static void
gimp_brush_generated_dirty (GimpData *data)
{
GimpBrushGenerated *brush = GIMP_BRUSH_GENERATED (data);
GimpBrush *gbrush = GIMP_BRUSH (brush);
if (gbrush->mask)
temp_buf_free (gbrush->mask);
gbrush->mask = gimp_brush_generated_calc (brush,
brush->shape,
brush->radius,
brush->spikes,
brush->hardness,
brush->aspect_ratio,
brush->angle,
&gbrush->x_axis,
&gbrush->y_axis);
GIMP_DATA_CLASS (parent_class)->dirty (data);
}
static TempBuf *
gimp_brush_generated_transform_mask (GimpBrush *gbrush,
gdouble scale,
gdouble aspect_ratio,
gdouble angle,
gdouble hardness)
{
GimpBrushGenerated *brush = GIMP_BRUSH_GENERATED (gbrush);
gdouble ratio;
if (aspect_ratio == 0.0)
{
ratio = brush->aspect_ratio;
}
else
{
ratio = MIN (fabs (aspect_ratio) + 1, 20);
/* Since generated brushes are symmetric the dont have input
* for aspect ratios < 1.0. its same as rotate by 90 degrees and
* 1 / ratio. So we fix the input up for this case. */
if (aspect_ratio < 0.0)
{
angle = angle + 0.25;
}
}
return gimp_brush_generated_calc (brush,
brush->shape,
brush->radius * scale,
brush->spikes,
brush->hardness * hardness,
ratio,
(brush->angle + 360 * angle),
NULL, NULL);
}
static GimpTempBuf *
gimp_brush_generated_transform_mask (GimpBrush *gbrush,
gdouble scale,
gdouble aspect_ratio,
gdouble angle,
gdouble hardness)
{
GimpBrushGenerated *brush = GIMP_BRUSH_GENERATED (gbrush);
gdouble ratio;
ratio = fabs (aspect_ratio) * 19.0 / 20.0 + 1.0;
ratio = MIN (ratio, 20);
/* Since generated brushes are symmetric they don't have aspect
* ratios < 1.0. it's the same as rotating by 90 degrees and 1 /
* ratio, so we fix the input for this case.
*/
if (aspect_ratio < 0.0)
angle = angle + 0.25;
angle *= 360;
if (angle < 0.0)
angle = -1.0 * fmod (angle, 180.0);
else if (angle > 180.0)
angle = fmod (angle, 180.0);
return gimp_brush_generated_calc (brush,
brush->shape,
brush->radius * scale,
brush->spikes,
hardness,
ratio,
angle,
NULL, NULL);
}
