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 void
gimp_eraser_motion (GimpPaintCore *paint_core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
const GimpCoords *coords)
{
GimpEraserOptions *options = GIMP_ERASER_OPTIONS (paint_options);
GimpContext *context = GIMP_CONTEXT (paint_options);
GimpDynamics *dynamics = GIMP_BRUSH_CORE (paint_core)->dynamics;
GimpDynamicsOutput *opacity_output;
GimpDynamicsOutput *force_output;
GimpImage *image;
gdouble fade_point;
gdouble opacity;
TempBuf *area;
guchar col[MAX_CHANNELS];
gdouble force;
image = gimp_item_get_image (GIMP_ITEM (drawable));
opacity_output = gimp_dynamics_get_output (dynamics,
GIMP_DYNAMICS_OUTPUT_OPACITY);
fade_point = gimp_paint_options_get_fade (paint_options,
gimp_item_get_image (GIMP_ITEM (drawable)),
paint_core->pixel_dist);
opacity = gimp_dynamics_output_get_linear_value (opacity_output,
coords,
paint_options,
fade_point);
if (opacity == 0.0)
return;
area = gimp_paint_core_get_paint_area (paint_core, drawable, paint_options,
coords);
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_get_data (area), col,
area->width * area->height, area->bytes);
force_output = gimp_dynamics_get_output (dynamics,
GIMP_DYNAMICS_OUTPUT_FORCE);
force = gimp_dynamics_output_get_linear_value (force_output,
coords,
paint_options,
fade_point);
gimp_brush_core_paste_canvas (GIMP_BRUSH_CORE (paint_core), drawable,
coords,
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),
force,
paint_options->application_mode);
}
static void
gimp_convolve_motion (GimpPaintCore *paint_core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options)
{
GimpConvolve *convolve = GIMP_CONVOLVE (paint_core);
GimpBrushCore *brush_core = GIMP_BRUSH_CORE (paint_core);
GimpConvolveOptions *options = GIMP_CONVOLVE_OPTIONS (paint_options);
GimpContext *context = GIMP_CONTEXT (paint_options);
GimpImage *image;
TempBuf *area;
PixelRegion srcPR;
PixelRegion destPR;
PixelRegion tempPR;
guchar *buffer;
gdouble opacity;
gdouble rate;
gint bytes;
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;
area = gimp_paint_core_get_paint_area (paint_core, drawable, paint_options);
if (! area)
return;
rate = options->rate;
rate *= gimp_paint_options_get_dynamic_rate (paint_options,
&paint_core->cur_coords);
gimp_convolve_calculate_matrix (convolve, options->type,
brush_core->brush->mask->width / 2,
brush_core->brush->mask->height / 2,
rate);
/* configure the source pixel region */
pixel_region_init (&srcPR, gimp_drawable_get_tiles (drawable),
area->x, area->y, area->width, area->height, FALSE);
if (gimp_drawable_has_alpha (drawable))
{
bytes = srcPR.bytes;
buffer = g_malloc (area->height * bytes * area->width);
pixel_region_init_data (&tempPR, buffer,
bytes, bytes * area->width,
0, 0, area->width, area->height);
copy_region (&srcPR, &tempPR);
}
else
{
/* note: this particular approach needlessly convolves the totally-
opaque alpha channel. A faster approach would be to keep
tempPR the same number of bytes as srcPR, and extend the
paint_core_replace_canvas API to handle non-alpha images. */
bytes = srcPR.bytes + 1;
buffer = g_malloc (area->height * bytes * area->width);
pixel_region_init_data (&tempPR, buffer,
bytes, bytes * area->width,
0, 0, area->width, area->height);
add_alpha_region (&srcPR, &tempPR);
}
/* Convolve the region */
pixel_region_init_data (&tempPR, buffer,
bytes, bytes * area->width,
0, 0, area->width, area->height);
pixel_region_init_temp_buf (&destPR, area,
0, 0, area->width, area->height);
convolve_region (&tempPR, &destPR,
convolve->matrix, 3, convolve->matrix_divisor,
GIMP_NORMAL_CONVOL, TRUE);
g_free (buffer);
gimp_brush_core_replace_canvas (brush_core, drawable,
MIN (opacity, GIMP_OPACITY_OPAQUE),
gimp_context_get_opacity (context),
gimp_paint_options_get_brush_mode (paint_options),
1.0,
GIMP_PAINT_INCREMENTAL);
}
void
gimp_source_core_motion (GimpSourceCore *source_core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options)
{
GimpPaintCore *paint_core = GIMP_PAINT_CORE (source_core);
GimpSourceOptions *options = GIMP_SOURCE_OPTIONS (paint_options);
GimpImage *image = gimp_item_get_image (GIMP_ITEM (drawable));
GimpPickable *src_pickable = NULL;
PixelRegion srcPR;
gint src_offset_x;
gint src_offset_y;
TempBuf *paint_area;
gint paint_area_offset_x;
gint paint_area_offset_y;
gint paint_area_width;
gint paint_area_height;
gdouble opacity;
opacity = gimp_paint_options_get_fade (paint_options, image,
paint_core->pixel_dist);
if (opacity == 0.0)
return;
src_offset_x = source_core->offset_x;
src_offset_y = source_core->offset_y;
if (options->use_source)
{
src_pickable = GIMP_PICKABLE (source_core->src_drawable);
if (options->sample_merged)
{
GimpImage *src_image = gimp_pickable_get_image (src_pickable);
gint off_x, off_y;
src_pickable = GIMP_PICKABLE (gimp_image_get_projection (src_image));
gimp_item_offsets (GIMP_ITEM (source_core->src_drawable),
&off_x, &off_y);
src_offset_x += off_x;
src_offset_y += off_y;
}
gimp_pickable_flush (src_pickable);
}
paint_area = gimp_paint_core_get_paint_area (paint_core, drawable,
paint_options);
if (! paint_area)
return;
paint_area_offset_x = 0;
paint_area_offset_y = 0;
paint_area_width = paint_area->width;
paint_area_height = paint_area->height;
if (options->use_source &&
! GIMP_SOURCE_CORE_GET_CLASS (source_core)->get_source (source_core,
drawable,
paint_options,
src_pickable,
src_offset_x,
src_offset_y,
paint_area,
&paint_area_offset_x,
&paint_area_offset_y,
&paint_area_width,
&paint_area_height,
&srcPR))
{
return;
}
/* Set the paint area to transparent */
temp_buf_data_clear (paint_area);
GIMP_SOURCE_CORE_GET_CLASS (source_core)->motion (source_core,
drawable,
paint_options,
opacity,
src_pickable,
&srcPR,
src_offset_x,
src_offset_y,
paint_area,
paint_area_offset_x,
paint_area_offset_y,
paint_area_width,
paint_area_height);
}
static void
gimp_ink_motion (GimpPaintCore *paint_core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
const GimpCoords *coords,
guint32 time)
{
GimpInk *ink = GIMP_INK (paint_core);
GimpInkOptions *options = GIMP_INK_OPTIONS (paint_options);
GimpContext *context = GIMP_CONTEXT (paint_options);
GimpImage *image;
GimpBlob *blob_union = NULL;
GimpBlob *blob_to_render;
TempBuf *area;
guchar col[MAX_CHANNELS];
PixelRegion blob_maskPR;
image = gimp_item_get_image (GIMP_ITEM (drawable));
if (! ink->last_blob)
{
ink->last_blob = ink_pen_ellipse (options,
coords->x,
coords->y,
coords->pressure,
coords->xtilt,
coords->ytilt,
100);
if (ink->start_blob)
g_free (ink->start_blob);
ink->start_blob = gimp_blob_duplicate (ink->last_blob);
blob_to_render = ink->last_blob;
}
else
{
GimpBlob *blob = ink_pen_ellipse (options,
coords->x,
coords->y,
coords->pressure,
coords->xtilt,
coords->ytilt,
coords->velocity * 100);
blob_union = gimp_blob_convex_union (ink->last_blob, blob);
g_free (ink->last_blob);
ink->last_blob = blob;
blob_to_render = blob_union;
}
/* Get the buffer */
ink->cur_blob = blob_to_render;
area = gimp_paint_core_get_paint_area (paint_core, drawable, paint_options,
coords);
ink->cur_blob = NULL;
if (! area)
return;
gimp_image_get_foreground (image, context, gimp_drawable_type (drawable),
col);
/* set the alpha channel */
col[paint_core->canvas_buf->bytes - 1] = OPAQUE_OPACITY;
/* color the pixels */
color_pixels (temp_buf_get_data (paint_core->canvas_buf), col,
area->width * area->height, area->bytes);
gimp_paint_core_validate_canvas_tiles (paint_core,
paint_core->canvas_buf->x,
paint_core->canvas_buf->y,
paint_core->canvas_buf->width,
paint_core->canvas_buf->height);
/* draw the blob directly to the canvas_tiles */
pixel_region_init (&blob_maskPR, paint_core->canvas_tiles,
paint_core->canvas_buf->x,
paint_core->canvas_buf->y,
paint_core->canvas_buf->width,
paint_core->canvas_buf->height,
TRUE);
render_blob (blob_to_render, &blob_maskPR);
/* draw the canvas_buf using the just rendered canvas_tiles as mask */
pixel_region_init (&blob_maskPR, paint_core->canvas_tiles,
paint_core->canvas_buf->x,
paint_core->canvas_buf->y,
paint_core->canvas_buf->width,
paint_core->canvas_buf->height,
FALSE);
gimp_paint_core_paste (paint_core, &blob_maskPR, drawable,
GIMP_OPACITY_OPAQUE,
gimp_context_get_opacity (context),
gimp_context_get_paint_mode (context),
GIMP_PAINT_CONSTANT);
if (blob_union)
g_free (blob_union);
}
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;
}
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);
}
