GimpBrushApplicationMode
gimp_paint_options_get_brush_mode (GimpPaintOptions *paint_options)
{
GimpDynamics *dynamics;
GimpDynamicsOutput *force_output;
gboolean dynamic_force = FALSE;
g_return_val_if_fail (GIMP_IS_PAINT_OPTIONS (paint_options), GIMP_BRUSH_SOFT);
if (paint_options->hard)
return GIMP_BRUSH_HARD;
dynamics = gimp_context_get_dynamics (GIMP_CONTEXT (paint_options));
force_output = gimp_dynamics_get_output (dynamics,
GIMP_DYNAMICS_OUTPUT_FORCE);
if (force_output)
dynamic_force = gimp_dynamics_output_is_enabled (force_output);
if (dynamic_force || (paint_options->brush_force > 0.0))
return GIMP_BRUSH_PRESSURE;
return GIMP_BRUSH_SOFT;
}
gboolean
gimp_paint_options_get_gradient_color (GimpPaintOptions *paint_options,
GimpImage *image,
gdouble grad_point,
gdouble pixel_dist,
GimpRGB *color)
{
GimpGradientOptions *gradient_options;
GimpGradient *gradient;
GimpDynamics *dynamics;
GimpDynamicsOutput *color_output;
g_return_val_if_fail (GIMP_IS_PAINT_OPTIONS (paint_options), FALSE);
g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
g_return_val_if_fail (color != NULL, FALSE);
gradient_options = paint_options->gradient_options;
gradient = gimp_context_get_gradient (GIMP_CONTEXT (paint_options));
dynamics = gimp_context_get_dynamics (GIMP_CONTEXT (paint_options));
color_output = gimp_dynamics_get_output (dynamics,
GIMP_DYNAMICS_OUTPUT_COLOR);
if (gimp_dynamics_output_is_enabled (color_output))
{
gimp_gradient_get_color_at (gradient, GIMP_CONTEXT (paint_options),
NULL, grad_point,
gradient_options->gradient_reverse,
color);
return TRUE;
}
return FALSE;
}
static void
gimp_smudge_motion (GimpPaintCore *paint_core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
const GimpCoords *coords)
{
GimpSmudge *smudge = GIMP_SMUDGE (paint_core);
GimpSmudgeOptions *options = GIMP_SMUDGE_OPTIONS (paint_options);
GimpContext *context = GIMP_CONTEXT (paint_options);
GimpDynamics *dynamics = GIMP_BRUSH_CORE (paint_core)->dynamics;
GimpImage *image = gimp_item_get_image (GIMP_ITEM (drawable));
GeglBuffer *paint_buffer;
gint paint_buffer_x;
gint paint_buffer_y;
gint paint_buffer_width;
gint paint_buffer_height;
gdouble fade_point;
gdouble opacity;
gdouble rate;
gdouble dynamic_rate;
gint x, y;
gdouble force;
gdouble dyn_force;
GimpDynamicsOutput *dyn_output = NULL;
fade_point = gimp_paint_options_get_fade (paint_options, image,
paint_core->pixel_dist);
opacity = gimp_dynamics_get_linear_value (dynamics,
GIMP_DYNAMICS_OUTPUT_OPACITY,
coords,
paint_options,
fade_point);
if (opacity == 0.0)
return;
paint_buffer = gimp_paint_core_get_paint_buffer (paint_core, drawable,
paint_options, coords,
&paint_buffer_x,
&paint_buffer_y);
if (! paint_buffer)
return;
paint_buffer_width = gegl_buffer_get_width (paint_buffer);
paint_buffer_height = gegl_buffer_get_height (paint_buffer);
/* Get the unclipped acumulator coordinates */
gimp_smudge_accumulator_coords (paint_core, coords, &x, &y);
/* Enable dynamic rate */
dynamic_rate = gimp_dynamics_get_linear_value (dynamics,
GIMP_DYNAMICS_OUTPUT_RATE,
coords,
paint_options,
fade_point);
rate = (options->rate / 100.0) * dynamic_rate;
/* Smudge uses the buffer Accum.
* For each successive painthit Accum is built like this
* Accum = rate*Accum + (1-rate)*I.
* where I is the pixels under the current painthit.
* Then the paint area (paint_area) is built as
* (Accum,1) (if no alpha),
*/
gimp_gegl_smudge_blend (smudge->accum_buffer,
GEGL_RECTANGLE (paint_buffer_x - x,
paint_buffer_y - y,
paint_buffer_width,
paint_buffer_height),
gimp_drawable_get_buffer (drawable),
GEGL_RECTANGLE (paint_buffer_x,
paint_buffer_y,
paint_buffer_width,
paint_buffer_height),
smudge->accum_buffer,
GEGL_RECTANGLE (paint_buffer_x - x,
paint_buffer_y - y,
paint_buffer_width,
paint_buffer_height),
rate);
gegl_buffer_copy (smudge->accum_buffer,
GEGL_RECTANGLE (paint_buffer_x - x,
paint_buffer_y - y,
paint_buffer_width,
paint_buffer_height),
paint_buffer,
GEGL_RECTANGLE (0, 0, 0, 0));
dyn_output = gimp_dynamics_get_output (dynamics,
GIMP_DYNAMICS_OUTPUT_FORCE);
dyn_force = gimp_dynamics_get_linear_value (dynamics,
GIMP_DYNAMICS_OUTPUT_FORCE,
coords,
paint_options,
fade_point);
if (gimp_dynamics_output_is_enabled (dyn_output))
force = dyn_force;
else
force = paint_options->brush_force;
gimp_brush_core_replace_canvas (GIMP_BRUSH_CORE (paint_core), drawable,
coords,
MIN (opacity, GIMP_OPACITY_OPAQUE),
gimp_context_get_opacity (context),
gimp_paint_options_get_brush_mode (paint_options),
force,
GIMP_PAINT_INCREMENTAL);
}
void
_gimp_paintbrush_motion (GimpPaintCore *paint_core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
const GimpCoords *coords,
gdouble opacity)
{
GimpBrushCore *brush_core = GIMP_BRUSH_CORE (paint_core);
GimpContext *context = GIMP_CONTEXT (paint_options);
GimpDynamics *dynamics = brush_core->dynamics;
GimpImage *image;
GimpRGB gradient_color;
GeglBuffer *paint_buffer;
gint paint_buffer_x;
gint paint_buffer_y;
GimpPaintApplicationMode paint_appl_mode;
gdouble fade_point;
gdouble grad_point;
gdouble force;
gdouble dyn_force;
GimpDynamicsOutput *dyn_output = NULL;
image = gimp_item_get_image (GIMP_ITEM (drawable));
fade_point = gimp_paint_options_get_fade (paint_options, image,
paint_core->pixel_dist);
opacity *= gimp_dynamics_get_linear_value (dynamics,
GIMP_DYNAMICS_OUTPUT_OPACITY,
coords,
paint_options,
fade_point);
if (opacity == 0.0)
return;
paint_buffer = gimp_paint_core_get_paint_buffer (paint_core, drawable,
paint_options, coords,
&paint_buffer_x,
&paint_buffer_y);
if (! paint_buffer)
return;
paint_appl_mode = paint_options->application_mode;
grad_point = gimp_dynamics_get_linear_value (dynamics,
GIMP_DYNAMICS_OUTPUT_COLOR,
coords,
paint_options,
fade_point);
if (gimp_paint_options_get_gradient_color (paint_options, image,
grad_point,
paint_core->pixel_dist,
&gradient_color))
{
/* optionally take the color from the current gradient */
GeglColor *color;
opacity *= gradient_color.a;
gimp_rgb_set_alpha (&gradient_color, GIMP_OPACITY_OPAQUE);
color = gimp_gegl_color_new (&gradient_color);
gegl_buffer_set_color (paint_buffer, NULL, color);
g_object_unref (color);
paint_appl_mode = GIMP_PAINT_INCREMENTAL;
}
else if (brush_core->brush && gimp_brush_get_pixmap (brush_core->brush))
{
/* otherwise check if the brush has a pixmap and use that to
* color the area
*/
gimp_brush_core_color_area_with_pixmap (brush_core, drawable,
coords,
paint_buffer,
paint_buffer_x,
paint_buffer_y,
gimp_paint_options_get_brush_mode (paint_options));
paint_appl_mode = GIMP_PAINT_INCREMENTAL;
}
else
{
/* otherwise fill the area with the foreground color */
GimpRGB foreground;
GeglColor *color;
gimp_context_get_foreground (context, &foreground);
color = gimp_gegl_color_new (&foreground);
gegl_buffer_set_color (paint_buffer, NULL, color);
g_object_unref (color);
}
dyn_output = gimp_dynamics_get_output (dynamics,
GIMP_DYNAMICS_OUTPUT_FORCE);
dyn_force = gimp_dynamics_get_linear_value (dynamics,
GIMP_DYNAMICS_OUTPUT_FORCE,
coords,
paint_options,
fade_point);
if (gimp_dynamics_output_is_enabled (dyn_output))
force = dyn_force;
else
force = paint_options->brush_force;
/* finally, let the brush core paste the colored area on the canvas */
gimp_brush_core_paste_canvas (brush_core, drawable,
coords,
MIN (opacity, GIMP_OPACITY_OPAQUE),
gimp_context_get_opacity (context),
gimp_context_get_paint_mode (context),
gimp_paint_options_get_brush_mode (paint_options),
force,
paint_appl_mode);
}