static GValueArray *
gimp_brush_select_run_callback (GimpPdbDialog *dialog,
GimpObject *object,
gboolean closing)
{
GimpBrush *brush = GIMP_BRUSH (object);
GimpArray *array;
GValueArray *return_vals;
array = gimp_array_new (temp_buf_data (brush->mask),
brush->mask->width *
brush->mask->height *
brush->mask->bytes,
TRUE);
return_vals =
gimp_pdb_execute_procedure_by_name (dialog->pdb,
dialog->caller_context,
NULL,
dialog->callback_name,
G_TYPE_STRING, object->name,
G_TYPE_DOUBLE, gimp_context_get_opacity (dialog->context) * 100.0,
GIMP_TYPE_INT32, GIMP_BRUSH_SELECT (dialog)->spacing,
GIMP_TYPE_INT32, gimp_context_get_paint_mode (dialog->context),
GIMP_TYPE_INT32, brush->mask->width,
GIMP_TYPE_INT32, brush->mask->height,
GIMP_TYPE_INT32, array->length,
GIMP_TYPE_INT8_ARRAY, array,
GIMP_TYPE_INT32, closing,
G_TYPE_NONE);
gimp_array_free (array);
return return_vals;
}
TempBuf *
gimp_vectors_get_new_preview (GimpViewable *viewable,
GimpContext *context,
gint width,
gint height)
{
GimpVectors *vectors;
GimpItem *item;
GimpStroke *cur_stroke;
gdouble xscale, yscale;
guchar *data;
TempBuf *temp_buf;
guchar white[1] = { 255 };
vectors = GIMP_VECTORS (viewable);
item = GIMP_ITEM (viewable);
xscale = ((gdouble) width) / gimp_image_get_width (item->image);
yscale = ((gdouble) height) / gimp_image_get_height (item->image);
temp_buf = temp_buf_new (width, height, 1, 0, 0, white);
data = temp_buf_data (temp_buf);
for (cur_stroke = gimp_vectors_stroke_get_next (vectors, NULL);
cur_stroke;
cur_stroke = gimp_vectors_stroke_get_next (vectors, cur_stroke))
{
GArray *coords;
gboolean closed;
gint i;
coords = gimp_stroke_interpolate (cur_stroke, 0.5, &closed);
if (coords)
{
for (i = 0; i < coords->len; i++)
{
GimpCoords point;
gint x, y;
point = g_array_index (coords, GimpCoords, i);
x = ROUND (point.x * xscale);
y = ROUND (point.y * yscale);
if (x >= 0 && y >= 0 && x < width && y < height)
data[y * width + x] = 0;
}
g_array_free (coords, TRUE);
}
}
return temp_buf;
}
static void
gimp_eraser_motion (GimpPaintCore *paint_core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options)
{
GimpEraserOptions *options = GIMP_ERASER_OPTIONS (paint_options);
GimpContext *context = GIMP_CONTEXT (paint_options);
GimpImage *image;
gdouble opacity;
TempBuf *area;
guchar col[MAX_CHANNELS];
gdouble hardness;
image = gimp_item_get_image (GIMP_ITEM (drawable));
opacity = gimp_paint_options_get_fade (paint_options, image,
paint_core->pixel_dist);
if (opacity == 0.0)
return;
area = gimp_paint_core_get_paint_area (paint_core, drawable, paint_options);
if (! area)
return;
gimp_image_get_background (image, context, gimp_drawable_type (drawable),
col);
/* set the alpha channel */
col[area->bytes - 1] = OPAQUE_OPACITY;
/* color the pixels */
color_pixels (temp_buf_data (area), col,
area->width * area->height, area->bytes);
opacity *= gimp_paint_options_get_dynamic_opacity (paint_options,
&paint_core->cur_coords);
hardness = gimp_paint_options_get_dynamic_hardness (paint_options,
&paint_core->cur_coords);
gimp_brush_core_paste_canvas (GIMP_BRUSH_CORE (paint_core), drawable,
MIN (opacity, GIMP_OPACITY_OPAQUE),
gimp_context_get_opacity (context),
(options->anti_erase ?
GIMP_ANTI_ERASE_MODE : GIMP_ERASE_MODE),
gimp_paint_options_get_brush_mode (paint_options),
hardness,
paint_options->application_mode);
}
static TempBuf *
gimp_brush_generated_calc (GimpBrushGenerated *brush,
GimpBrushGeneratedShape shape,
gfloat radius,
gint spikes,
gfloat hardness,
gfloat aspect_ratio,
gfloat angle,
GimpVector2 *xaxis,
GimpVector2 *yaxis)
{
guchar *centerp;
guchar *lookup;
guchar a;
gint half_width = 0;
gint half_height = 0;
gint x, y;
gdouble c, s, cs, ss;
GimpVector2 x_axis;
GimpVector2 y_axis;
TempBuf *mask;
gimp_brush_generated_get_half_size (brush,
shape,
radius,
spikes,
hardness,
aspect_ratio,
angle,
&half_width, &half_height,
&s, &c, &x_axis, &y_axis);
mask = temp_buf_new (half_width * 2 + 1,
half_height * 2 + 1,
1, half_width, half_height, NULL);
centerp = temp_buf_data (mask) + half_height * mask->width + half_width;
lookup = gimp_brush_generated_calc_lut (radius, hardness);
cs = cos (- 2 * G_PI / spikes);
ss = sin (- 2 * G_PI / spikes);
/* for an even number of spikes compute one half and mirror it */
for (y = (spikes % 2 ? -half_height : 0); y <= half_height; y++)
{
for (x = -half_width; x <= half_width; x++)
{
gdouble d = 0;
gdouble tx = c * x - s * y;
gdouble ty = fabs (s * x + c * y);
if (spikes > 2)
{
gdouble angle = atan2 (ty, tx);
while (angle > G_PI / spikes)
{
gdouble sx = tx;
gdouble sy = ty;
tx = cs * sx - ss * sy;
ty = ss * sx + cs * sy;
angle -= 2 * G_PI / spikes;
}
}
ty *= aspect_ratio;
switch (shape)
{
case GIMP_BRUSH_GENERATED_CIRCLE:
d = sqrt (SQR (tx) + SQR (ty));
break;
case GIMP_BRUSH_GENERATED_SQUARE:
d = MAX (fabs (tx), fabs (ty));
break;
case GIMP_BRUSH_GENERATED_DIAMOND:
d = fabs (tx) + fabs (ty);
break;
}
if (d < radius + 1)
a = lookup[(gint) RINT (d * OVERSAMPLING)];
else
a = 0;
centerp[y * mask->width + x] = a;
if (spikes % 2 == 0)
centerp[-1 * y * mask->width - x] = a;
}
}
g_free (lookup);
if (xaxis)
*xaxis = x_axis;
if (yaxis)
*yaxis = y_axis;
return mask;
}
static GValueArray *
brushes_get_brush_data_invoker (GimpProcedure *procedure,
Gimp *gimp,
GimpContext *context,
GimpProgress *progress,
const GValueArray *args)
{
gboolean success = TRUE;
GValueArray *return_vals;
const gchar *name;
gchar *actual_name = NULL;
gdouble opacity = 0.0;
gint32 spacing = 0;
gint32 paint_mode = 0;
gint32 width = 0;
gint32 height = 0;
gint32 length = 0;
guint8 *mask_data = NULL;
name = g_value_get_string (&args->values[0]);
if (success)
{
GimpBrush *brush;
if (name && strlen (name))
{
brush = (GimpBrush *)
gimp_container_get_child_by_name (gimp->brush_factory->container, name);
}
else
{
brush = gimp_context_get_brush (context);
}
if (brush)
{
actual_name = g_strdup (gimp_object_get_name (GIMP_OBJECT (brush)));
opacity = 1.0;
spacing = gimp_brush_get_spacing (brush);
paint_mode = 0;
width = brush->mask->width;
height = brush->mask->height;
length = brush->mask->height * brush->mask->width;
mask_data = g_memdup (temp_buf_data (brush->mask), length);
}
else
success = FALSE;
}
return_vals = gimp_procedure_get_return_values (procedure, success);
if (success)
{
g_value_take_string (&return_vals->values[1], actual_name);
g_value_set_double (&return_vals->values[2], opacity);
g_value_set_int (&return_vals->values[3], spacing);
g_value_set_enum (&return_vals->values[4], paint_mode);
g_value_set_int (&return_vals->values[5], width);
g_value_set_int (&return_vals->values[6], height);
g_value_set_int (&return_vals->values[7], length);
gimp_value_take_int8array (&return_vals->values[8], mask_data, length);
}
return return_vals;
}
void
_gimp_paintbrush_motion (GimpPaintCore *paint_core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
gdouble opacity)
{
GimpBrushCore *brush_core = GIMP_BRUSH_CORE (paint_core);
GimpContext *context = GIMP_CONTEXT (paint_options);
GimpPressureOptions *pressure_options = paint_options->pressure_options;
GimpImage *image;
GimpRGB gradient_color;
TempBuf *area;
guchar col[MAX_CHANNELS];
GimpPaintApplicationMode paint_appl_mode;
image = gimp_item_get_image (GIMP_ITEM (drawable));
opacity *= gimp_paint_options_get_fade (paint_options, image,
paint_core->pixel_dist);
if (opacity == 0.0)
return;
paint_appl_mode = paint_options->application_mode;
area = gimp_paint_core_get_paint_area (paint_core, drawable, paint_options);
if (! area)
return;
/* optionally take the color from the current gradient */
if (gimp_paint_options_get_gradient_color (paint_options, image,
paint_core->cur_coords.pressure,
paint_core->pixel_dist,
&gradient_color))
{
opacity *= gradient_color.a;
gimp_rgb_get_uchar (&gradient_color,
&col[RED_PIX],
&col[GREEN_PIX],
&col[BLUE_PIX]);
col[ALPHA_PIX] = OPAQUE_OPACITY;
color_pixels (temp_buf_data (area), col,
area->width * area->height,
area->bytes);
paint_appl_mode = GIMP_PAINT_INCREMENTAL;
}
/* otherwise check if the brush has a pixmap and use that to color the area */
else if (brush_core->brush && brush_core->brush->pixmap)
{
gimp_brush_core_color_area_with_pixmap (brush_core, drawable,
area,
gimp_paint_options_get_brush_mode (paint_options));
paint_appl_mode = GIMP_PAINT_INCREMENTAL;
}
/* otherwise fill the area with the foreground color */
else
{
gimp_image_get_foreground (image, context, gimp_drawable_type (drawable),
col);
col[area->bytes - 1] = OPAQUE_OPACITY;
color_pixels (temp_buf_data (area), col,
area->width * area->height,
area->bytes);
}
if (paint_core->use_pressure && pressure_options->opacity)
opacity *= PRESSURE_SCALE * paint_core->cur_coords.pressure;
/* finally, let the brush core paste the colored area on the canvas */
gimp_brush_core_paste_canvas (brush_core, drawable,
MIN (opacity, GIMP_OPACITY_OPAQUE),
gimp_context_get_opacity (context),
gimp_context_get_paint_mode (context),
gimp_paint_options_get_brush_mode (paint_options),
paint_appl_mode);
}
