static TempBuf *
gimp_ink_get_paint_area (GimpPaintCore *paint_core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
const GimpCoords *coords)
{
GimpInk *ink = GIMP_INK (paint_core);
gint x, y;
gint width, height;
gint dwidth, dheight;
gint x1, y1, x2, y2;
gint bytes;
bytes = gimp_drawable_bytes_with_alpha (drawable);
gimp_blob_bounds (ink->cur_blob, &x, &y, &width, &height);
dwidth = gimp_item_get_width (GIMP_ITEM (drawable));
dheight = gimp_item_get_height (GIMP_ITEM (drawable));
x1 = CLAMP (x / SUBSAMPLE - 1, 0, dwidth);
y1 = CLAMP (y / SUBSAMPLE - 1, 0, dheight);
x2 = CLAMP ((x + width) / SUBSAMPLE + 2, 0, dwidth);
y2 = CLAMP ((y + height) / SUBSAMPLE + 2, 0, dheight);
/* configure the canvas buffer */
if ((x2 - x1) && (y2 - y1))
paint_core->canvas_buf = temp_buf_resize (paint_core->canvas_buf, bytes,
x1, y1,
(x2 - x1), (y2 - y1));
else
return NULL;
return paint_core->canvas_buf;
}
static void
gimp_ink_undo_constructed (GObject *object)
{
GimpInkUndo *ink_undo = GIMP_INK_UNDO (object);
GimpInk *ink;
G_OBJECT_CLASS (parent_class)->constructed (object);
g_assert (GIMP_IS_INK (GIMP_PAINT_CORE_UNDO (ink_undo)->paint_core));
ink = GIMP_INK (GIMP_PAINT_CORE_UNDO (ink_undo)->paint_core);
if (ink->start_blobs)
{
gint i;
GimpBlob *blob;
for (i = 0; i < g_list_length (ink->start_blobs); i++)
{
blob = g_list_nth_data (ink->start_blobs, i);
ink_undo->last_blobs = g_list_prepend (ink_undo->last_blobs,
gimp_blob_duplicate (blob));
}
ink_undo->last_blobs = g_list_reverse (ink_undo->last_blobs);
}
}
static void
gimp_ink_paint (GimpPaintCore *paint_core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
const GimpCoords *coords,
GimpPaintState paint_state,
guint32 time)
{
GimpInk *ink = GIMP_INK (paint_core);
GimpCoords last_coords;
gimp_paint_core_get_last_coords (paint_core, &last_coords);
switch (paint_state)
{
case GIMP_PAINT_STATE_INIT:
if (coords->x == last_coords.x &&
coords->y == last_coords.y)
{
/* start with new blobs if we're not interpolating */
if (ink->start_blob)
{
g_free (ink->start_blob);
ink->start_blob = NULL;
}
if (ink->last_blob)
{
g_free (ink->last_blob);
ink->last_blob = NULL;
}
}
else if (ink->last_blob)
{
/* save the start blob of the line for undo otherwise */
if (ink->start_blob)
g_free (ink->start_blob);
ink->start_blob = gimp_blob_duplicate (ink->last_blob);
}
break;
case GIMP_PAINT_STATE_MOTION:
gimp_ink_motion (paint_core, drawable, paint_options, coords, time);
break;
case GIMP_PAINT_STATE_FINISH:
break;
}
}
static GeglBuffer *
gimp_ink_get_paint_buffer (GimpPaintCore *paint_core,
GimpDrawable *drawable,
GimpPaintOptions *paint_options,
const GimpCoords *coords,
gint *paint_buffer_x,
gint *paint_buffer_y)
{
GimpInk *ink = GIMP_INK (paint_core);
gint x, y;
gint width, height;
gint dwidth, dheight;
gint x1, y1, x2, y2;
gimp_blob_bounds (ink->cur_blob, &x, &y, &width, &height);
dwidth = gimp_item_get_width (GIMP_ITEM (drawable));
dheight = gimp_item_get_height (GIMP_ITEM (drawable));
x1 = CLAMP (x / SUBSAMPLE - 1, 0, dwidth);
y1 = CLAMP (y / SUBSAMPLE - 1, 0, dheight);
x2 = CLAMP ((x + width) / SUBSAMPLE + 2, 0, dwidth);
y2 = CLAMP ((y + height) / SUBSAMPLE + 2, 0, dheight);
/* configure the canvas buffer */
if ((x2 - x1) && (y2 - y1))
{
GimpTempBuf *temp_buf;
const Babl *format;
if (gimp_drawable_get_linear (drawable))
format = babl_format ("RGBA float");
else
format = babl_format ("R'G'B'A float");
temp_buf = gimp_temp_buf_new ((x2 - x1), (y2 - y1),
format);
*paint_buffer_x = x1;
*paint_buffer_y = y1;
if (paint_core->paint_buffer)
g_object_unref (paint_core->paint_buffer);
paint_core->paint_buffer = gimp_temp_buf_create_buffer (temp_buf);
gimp_temp_buf_unref (temp_buf);
return paint_core->paint_buffer;
}
return NULL;
}
static void
gimp_ink_undo_constructed (GObject *object)
{
GimpInkUndo *ink_undo = GIMP_INK_UNDO (object);
GimpInk *ink;
G_OBJECT_CLASS (parent_class)->constructed (object);
g_assert (GIMP_IS_INK (GIMP_PAINT_CORE_UNDO (ink_undo)->paint_core));
ink = GIMP_INK (GIMP_PAINT_CORE_UNDO (ink_undo)->paint_core);
if (ink->start_blob)
ink_undo->last_blob = gimp_blob_duplicate (ink->start_blob);
}
static void
gimp_ink_finalize (GObject *object)
{
GimpInk *ink = GIMP_INK (object);
if (ink->start_blob)
{
g_free (ink->start_blob);
ink->start_blob = NULL;
}
if (ink->last_blob)
{
g_free (ink->last_blob);
ink->last_blob = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_ink_undo_pop (GimpUndo *undo,
GimpUndoMode undo_mode,
GimpUndoAccumulator *accum)
{
GimpInkUndo *ink_undo = GIMP_INK_UNDO (undo);
GIMP_UNDO_CLASS (parent_class)->pop (undo, undo_mode, accum);
if (GIMP_PAINT_CORE_UNDO (ink_undo)->paint_core)
{
GimpInk *ink = GIMP_INK (GIMP_PAINT_CORE_UNDO (ink_undo)->paint_core);
GList *tmp_blobs;
tmp_blobs = ink->last_blobs;
ink->last_blobs = ink_undo->last_blobs;
ink_undo->last_blobs = tmp_blobs;
}
}
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);
GimpBlob *blob_union = NULL;
GimpBlob *blob_to_render;
GeglBuffer *paint_buffer;
gint paint_buffer_x;
gint paint_buffer_y;
GimpRGB foreground;
GeglColor *color;
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;
paint_buffer = gimp_paint_core_get_paint_buffer (paint_core, drawable,
paint_options, coords,
&paint_buffer_x,
&paint_buffer_y);
ink->cur_blob = NULL;
if (! paint_buffer)
return;
gimp_context_get_foreground (context, &foreground);
color = gimp_gegl_color_new (&foreground);
gegl_buffer_set_color (paint_buffer, NULL, color);
g_object_unref (color);
/* draw the blob directly to the canvas_buffer */
render_blob (paint_core->canvas_buffer,
GEGL_RECTANGLE (paint_core->paint_buffer_x,
paint_core->paint_buffer_y,
gegl_buffer_get_width (paint_core->paint_buffer),
gegl_buffer_get_height (paint_core->paint_buffer)),
blob_to_render);
/* draw the paint_area using the just rendered canvas_buffer as mask */
gimp_paint_core_paste (paint_core,
paint_core->canvas_buffer,
GEGL_RECTANGLE (paint_core->paint_buffer_x,
paint_core->paint_buffer_y,
gegl_buffer_get_width (paint_core->paint_buffer),
gegl_buffer_get_height (paint_core->paint_buffer)),
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_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);
}