static void
gimp_smudge_paint (GimpPaintCore *paint_core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
const GimpCoords *coords,
GimpPaintState paint_state,
guint32 time)
{
GimpSmudge *smudge = GIMP_SMUDGE (paint_core);
switch (paint_state)
{
case GIMP_PAINT_STATE_MOTION:
/* initialization fails if the user starts outside the drawable */
if (! smudge->initialized)
smudge->initialized = gimp_smudge_start (paint_core, drawable,
paint_options, coords);
if (smudge->initialized)
gimp_smudge_motion (paint_core, drawable, paint_options, coords);
break;
case GIMP_PAINT_STATE_FINISH:
if (smudge->accum_buffer)
{
g_object_unref (smudge->accum_buffer);
smudge->accum_buffer = NULL;
}
smudge->initialized = FALSE;
break;
default:
break;
}
}
static void
gimp_smudge_accumulator_coords (GimpPaintCore *paint_core,
const GimpCoords *coords,
gint *x,
gint *y)
{
GimpSmudge *smudge = GIMP_SMUDGE (paint_core);
*x = (gint) coords->x - gegl_buffer_get_width (smudge->accum_buffer) / 2;
*y = (gint) coords->y - gegl_buffer_get_height (smudge->accum_buffer) / 2;
}
static void
gimp_smudge_finalize (GObject *object)
{
GimpSmudge *smudge = GIMP_SMUDGE (object);
if (smudge->accum_buffer)
{
g_object_unref (smudge->accum_buffer);
smudge->accum_buffer = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_smudge_finalize (GObject *object)
{
GimpSmudge *smudge = GIMP_SMUDGE (object);
if (smudge->accum_data)
{
g_free (smudge->accum_data);
smudge->accum_data = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
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);
}
static gboolean
gimp_smudge_start (GimpPaintCore *paint_core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
const GimpCoords *coords)
{
GimpSmudge *smudge = GIMP_SMUDGE (paint_core);
GeglBuffer *paint_buffer;
gint paint_buffer_x;
gint paint_buffer_y;
gint accum_size;
gint x, y;
paint_buffer = gimp_paint_core_get_paint_buffer (paint_core, drawable,
paint_options, coords,
&paint_buffer_x,
&paint_buffer_y);
if (! paint_buffer)
return FALSE;
gimp_smudge_accumulator_size (paint_options, coords, &accum_size);
/* Allocate the accumulation buffer */
smudge->accum_buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0,
accum_size,
accum_size),
babl_format ("RGBA float"));
/* adjust the x and y coordinates to the upper left corner of the
* accumulator
*/
gimp_smudge_accumulator_coords (paint_core, coords, &x, &y);
/* If clipped, prefill the smudge buffer with the color at the
* brush position.
*/
if (x != paint_buffer_x ||
y != paint_buffer_y ||
accum_size != gegl_buffer_get_width (paint_buffer) ||
accum_size != gegl_buffer_get_height (paint_buffer))
{
GimpRGB pixel;
GeglColor *color;
gimp_pickable_get_color_at (GIMP_PICKABLE (drawable),
CLAMP ((gint) coords->x,
0,
gimp_item_get_width (GIMP_ITEM (drawable)) - 1),
CLAMP ((gint) coords->y,
0,
gimp_item_get_height (GIMP_ITEM (drawable)) - 1),
&pixel);
color = gimp_gegl_color_new (&pixel);
gegl_buffer_set_color (smudge->accum_buffer, NULL, color);
g_object_unref (color);
}
/* copy the region under the original painthit. */
gegl_buffer_copy (gimp_drawable_get_buffer (drawable),
GEGL_RECTANGLE (paint_buffer_x,
paint_buffer_y,
gegl_buffer_get_width (paint_buffer),
gegl_buffer_get_height (paint_buffer)),
smudge->accum_buffer,
GEGL_RECTANGLE (paint_buffer_x - x,
paint_buffer_y - y,
0, 0));
return TRUE;
}
static void
gimp_smudge_motion (GimpPaintCore *paint_core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options)
{
GimpSmudge *smudge = GIMP_SMUDGE (paint_core);
GimpSmudgeOptions *options = GIMP_SMUDGE_OPTIONS (paint_options);
GimpContext *context = GIMP_CONTEXT (paint_options);
GimpPressureOptions *pressure_options = paint_options->pressure_options;
GimpImage *image;
TempBuf *area;
PixelRegion srcPR, destPR, tempPR;
gdouble rate;
gdouble opacity;
gint x, y, w, h;
image = gimp_item_get_image (GIMP_ITEM (drawable));
if (gimp_drawable_is_indexed (drawable))
return;
opacity = gimp_paint_options_get_fade (paint_options, image,
paint_core->pixel_dist);
if (opacity == 0.0)
return;
/* Get the unclipped brush coordinates */
gimp_smudge_brush_coords (paint_core, &x, &y, &w, &h);
/* Get the paint area (Smudge won't scale!) */
area = gimp_paint_core_get_paint_area (paint_core, drawable, paint_options);
if (! area)
return;
/* srcPR will be the pixels under the current painthit from the drawable */
pixel_region_init (&srcPR, gimp_drawable_get_tiles (drawable),
area->x, area->y, area->width, area->height, FALSE);
/* Enable pressure sensitive rate */
if (pressure_options->rate)
rate = MIN (options->rate / 100.0 * PRESSURE_SCALE *
paint_core->cur_coords.pressure, 1.0);
else
rate = options->rate / 100.0;
/* The tempPR will be the built up buffer (for smudge) */
pixel_region_init_data (&tempPR, smudge->accum_data,
smudge->accumPR.bytes,
smudge->accumPR.rowstride,
area->x - x,
area->y - y,
area->width,
area->height);
/* The dest will be the paint area we got above (= canvas_buf) */
pixel_region_init_temp_buf (&destPR, area,
0, 0, area->width, area->height);
/* 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 (canvas_buf) is built as
* (Accum,1) (if no alpha),
*/
blend_region (&srcPR, &tempPR, &tempPR, ROUND (rate * 255.0));
/* re-init the tempPR */
pixel_region_init_data (&tempPR, smudge->accum_data,
smudge->accumPR.bytes,
smudge->accumPR.rowstride,
area->x - x,
area->y - y,
area->width,
area->height);
if (! gimp_drawable_has_alpha (drawable))
add_alpha_region (&tempPR, &destPR);
else
copy_region (&tempPR, &destPR);
if (pressure_options->opacity)
opacity *= PRESSURE_SCALE * paint_core->cur_coords.pressure;
gimp_brush_core_replace_canvas (GIMP_BRUSH_CORE (paint_core), drawable,
MIN (opacity, GIMP_OPACITY_OPAQUE),
gimp_context_get_opacity (context),
gimp_paint_options_get_brush_mode (paint_options),
GIMP_PAINT_INCREMENTAL);
}
static gboolean
gimp_smudge_start (GimpPaintCore *paint_core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options)
{
GimpSmudge *smudge = GIMP_SMUDGE (paint_core);
GimpImage *image;
TempBuf *area;
PixelRegion srcPR;
gint bytes;
gint x, y, w, h;
image = gimp_item_get_image (GIMP_ITEM (drawable));
if (gimp_drawable_is_indexed (drawable))
return FALSE;
area = gimp_paint_core_get_paint_area (paint_core, drawable, paint_options);
if (! area)
return FALSE;
/* adjust the x and y coordinates to the upper left corner of the brush */
gimp_smudge_brush_coords (paint_core, &x, &y, &w, &h);
/* Allocate the accumulation buffer */
bytes = gimp_drawable_bytes (drawable);
smudge->accum_data = g_malloc (w * h * bytes);
/* If clipped, prefill the smudge buffer with the color at the
* brush position.
*/
if (x != area->x || y != area->y || w != area->width || h != area->height)
{
guchar fill[4];
gimp_pickable_get_pixel_at (GIMP_PICKABLE (drawable),
CLAMP ((gint) paint_core->cur_coords.x,
0,
gimp_item_width (GIMP_ITEM (drawable)) - 1),
CLAMP ((gint) paint_core->cur_coords.y,
0,
gimp_item_height (GIMP_ITEM (drawable)) - 1),
fill);
pixel_region_init_data (&srcPR, smudge->accum_data,
bytes, bytes * w,
0, 0, w, h);
color_region (&srcPR, fill);
}
pixel_region_init (&srcPR, gimp_drawable_get_tiles (drawable),
area->x, area->y, area->width, area->height, FALSE);
pixel_region_init_data (&smudge->accumPR, smudge->accum_data,
bytes, bytes * w,
area->x - x,
area->y - y,
area->width,
area->height);
/* copy the region under the original painthit. */
copy_region (&srcPR, &smudge->accumPR);
pixel_region_init_data (&smudge->accumPR, smudge->accum_data,
bytes, bytes * w,
area->x - x,
area->y - y,
area->width,
area->height);
return TRUE;
}
