gboolean
gimp_babl_format_get_linear (const Babl *format)
{
const Babl *model;
g_return_val_if_fail (format != NULL, FALSE);
model = babl_format_get_model (format);
if (model == babl_model ("Y") ||
model == babl_model ("YA") ||
model == babl_model ("RGB") ||
model == babl_model ("RGBA"))
{
return TRUE;
}
else if (model == babl_model ("Y'") ||
model == babl_model ("Y'A") ||
model == babl_model ("R'G'B'") ||
model == babl_model ("R'G'B'A"))
{
return FALSE;
}
else if (babl_format_is_palette (format))
{
return FALSE;
}
g_return_val_if_reached (FALSE);
}
static GimpTempBuf *
gimp_buffer_get_new_preview (GimpViewable *viewable,
GimpContext *context,
gint width,
gint height)
{
GimpBuffer *buffer = GIMP_BUFFER (viewable);
const Babl *format = gimp_buffer_get_format (buffer);
GimpTempBuf *preview;
if (babl_format_is_palette (format))
format = gimp_babl_format (GIMP_RGB, GIMP_PRECISION_U8_GAMMA,
babl_format_has_alpha (format));
else
format = gimp_babl_format (gimp_babl_format_get_base_type (format),
gimp_babl_precision (GIMP_COMPONENT_TYPE_U8,
gimp_babl_format_get_linear (format)),
babl_format_has_alpha (format));
preview = gimp_temp_buf_new (width, height, format);
gegl_buffer_get (buffer->buffer, GEGL_RECTANGLE (0, 0, width, height),
MIN ((gdouble) width / (gdouble) gimp_buffer_get_width (buffer),
(gdouble) height / (gdouble) gimp_buffer_get_height (buffer)),
format,
gimp_temp_buf_get_data (preview),
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
return preview;
}
GimpImageBaseType
gimp_babl_format_get_base_type (const Babl *format)
{
const Babl *model;
g_return_val_if_fail (format != NULL, -1);
model = babl_format_get_model (format);
if (model == babl_model ("Y") ||
model == babl_model ("Y'") ||
model == babl_model ("YA") ||
model == babl_model ("Y'A"))
{
return GIMP_GRAY;
}
else if (model == babl_model ("RGB") ||
model == babl_model ("R'G'B'") ||
model == babl_model ("RGBA") ||
model == babl_model ("R'G'B'A"))
{
return GIMP_RGB;
}
else if (babl_format_is_palette (format))
{
return GIMP_INDEXED;
}
g_return_val_if_reached (-1);
}
const Babl *
gimp_babl_compat_u8_format (const Babl *format)
{
g_return_val_if_fail (format != NULL, NULL);
/* indexed images only exist in u8, return the same format */
if (babl_format_is_palette (format))
return format;
return gimp_babl_format (gimp_babl_format_get_base_type (format),
GIMP_PRECISION_U8,
babl_format_has_alpha (format));
}
GimpImageType
gimp_babl_format_get_image_type (const Babl *format)
{
const gchar *name;
g_return_val_if_fail (format != NULL, -1);
name = babl_get_name (babl_format_get_model (format));
if (! strcmp (name, "Y") ||
! strcmp (name, "Y'") ||
! strcmp (name, "Y~"))
{
return GIMP_GRAY_IMAGE;
}
else if (! strcmp (name, "YA") ||
! strcmp (name, "Y'A") ||
! strcmp (name, "Y~A"))
{
return GIMP_GRAYA_IMAGE;
}
else if (! strcmp (name, "RGB") ||
! strcmp (name, "R'G'B'") ||
! strcmp (name, "R~G~B~"))
{
return GIMP_RGB_IMAGE;
}
else if (! strcmp (name, "RGBA") ||
! strcmp (name, "R'G'B'A") ||
! strcmp (name, "R~G~B~A"))
{
return GIMP_RGBA_IMAGE;
}
else if (babl_format_is_palette (format))
{
if (babl_format_has_alpha (format))
return GIMP_INDEXEDA_IMAGE;
else
return GIMP_INDEXED_IMAGE;
}
g_return_val_if_reached (-1);
}
static const Babl *
choose_format (GeglBuffer *buffer,
GimpSelectCriterion select_criterion,
gint *n_components,
gboolean *has_alpha)
{
const Babl *format = gegl_buffer_get_format (buffer);
*has_alpha = babl_format_has_alpha (format);
switch (select_criterion)
{
case GIMP_SELECT_CRITERION_COMPOSITE:
if (babl_format_is_palette (format))
format = babl_format ("R'G'B'A float");
else
format = gimp_babl_format (gimp_babl_format_get_base_type (format),
GIMP_PRECISION_FLOAT_GAMMA,
*has_alpha);
break;
case GIMP_SELECT_CRITERION_R:
case GIMP_SELECT_CRITERION_G:
case GIMP_SELECT_CRITERION_B:
case GIMP_SELECT_CRITERION_A:
format = babl_format ("R'G'B'A float");
break;
case GIMP_SELECT_CRITERION_H:
case GIMP_SELECT_CRITERION_S:
case GIMP_SELECT_CRITERION_V:
format = babl_format ("HSVA float");
break;
default:
g_return_val_if_reached (NULL);
break;
}
*n_components = babl_format_get_n_components (format);
return format;
}
int
main (int argc,
char **argv)
{
int OK = 1;
babl_init ();
OK = ! babl_format_is_palette (babl_format_n (babl_type ("double"), 3));
if(1) {
unsigned char in[][1] = {{ 0},{ 1},{ 2},{15}};
unsigned char out[][4] = {{0,0,0,255},{127,0,0,255},{0,127,0,255},{255,255,255,255}};
const Babl *palA;// = babl_new_palette (NULL, 0);
//Babl *palB = babl_new_palette (NULL, 0);
//
babl_new_palette (NULL, &palA, NULL);
assert (palA);
CHECK_CONV("pal to rgba", unsigned char,
palA, babl_format("RGBA u8"),
in, out);
}
GimpImageType
gimp_babl_format_get_image_type (const Babl *format)
{
const Babl *model;
g_return_val_if_fail (format != NULL, -1);
model = babl_format_get_model (format);
if (model == babl_model ("Y") ||
model == babl_model ("Y'"))
{
return GIMP_GRAY_IMAGE;
}
else if (model == babl_model ("YA") ||
model == babl_model ("Y'A"))
{
return GIMP_GRAYA_IMAGE;
}
else if (model == babl_model ("RGB") ||
model == babl_model ("R'G'B'"))
{
return GIMP_RGB_IMAGE;
}
else if (model == babl_model ("RGBA") ||
model == babl_model ("R'G'B'A"))
{
return GIMP_RGBA_IMAGE;
}
else if (babl_format_is_palette (format))
{
if (babl_format_has_alpha (format))
return GIMP_INDEXEDA_IMAGE;
else
return GIMP_INDEXED_IMAGE;
}
g_return_val_if_reached (-1);
}
const gchar *
gimp_babl_get_description (const Babl *babl)
{
const gchar *description;
g_return_val_if_fail (babl != NULL, NULL);
if (G_UNLIKELY (! babl_description_hash))
{
gint i;
babl_description_hash = g_hash_table_new (g_str_hash,
g_str_equal);
for (i = 0; i < G_N_ELEMENTS (babl_descriptions); i++)
g_hash_table_insert (babl_description_hash,
(gpointer) babl_descriptions[i].name,
gettext (babl_descriptions[i].description));
}
if (babl_format_is_palette (babl))
{
if (babl_format_has_alpha (babl))
return _("Indexed-alpha");
else
return _("Indexed");
}
description = g_hash_table_lookup (babl_description_hash,
babl_get_name (babl));
if (description)
return description;
return g_strconcat ("ERROR: unknown Babl format ",
babl_get_name (babl), NULL);
}
gboolean
gimp_pickable_pick_color (GimpPickable *pickable,
gint x,
gint y,
gboolean sample_average,
gdouble average_radius,
GimpRGB *color,
gint *color_index)
{
const Babl *format;
gdouble pixel[4];
g_return_val_if_fail (GIMP_IS_PICKABLE (pickable), FALSE);
format = babl_format ("RGBA double");
if (! gimp_pickable_get_pixel_at (pickable, x, y, format, pixel))
return FALSE;
if (sample_average)
{
gint count = 0;
gdouble color_avg[4] = { 0.0, 0.0, 0.0, 0.0 };
gint radius = (gint) average_radius;
gint i, j;
for (i = x - radius; i <= x + radius; i++)
for (j = y - radius; j <= y + radius; j++)
if (gimp_pickable_get_pixel_at (pickable, i, j, format, pixel))
{
count++;
color_avg[RED] += pixel[RED];
color_avg[GREEN] += pixel[GREEN];
color_avg[BLUE] += pixel[BLUE];
color_avg[ALPHA] += pixel[ALPHA];
}
pixel[RED] = color_avg[RED] / count;
pixel[GREEN] = color_avg[GREEN] / count;
pixel[BLUE] = color_avg[BLUE] / count;
pixel[ALPHA] = color_avg[ALPHA] / count;
}
gimp_rgba_set_pixel (color, format, pixel);
if (color_index)
{
format = gimp_pickable_get_format (pickable);
if (babl_format_is_palette (format) && ! sample_average)
{
guchar indexed_pixel[4];
gimp_pickable_get_pixel_at (pickable, x, y, format, indexed_pixel);
*color_index = indexed_pixel[0];
}
else
{
*color_index = -1;
}
}
return TRUE;
}
static void
gimp_color_tool_real_picked (GimpColorTool *color_tool,
GimpColorPickState pick_state,
gdouble x,
gdouble y,
const Babl *sample_format,
const GimpRGB *color,
gint color_index)
{
GimpTool *tool = GIMP_TOOL (color_tool);
GimpContext *context;
/* use this tool's own options here (NOT color_tool->options) */
context = GIMP_CONTEXT (gimp_tool_get_options (tool));
if (color_tool->pick_mode == GIMP_COLOR_PICK_MODE_FOREGROUND ||
color_tool->pick_mode == GIMP_COLOR_PICK_MODE_BACKGROUND)
{
GtkWidget *widget;
if (babl_format_is_palette (sample_format))
{
widget = gimp_dialog_factory_find_widget (gimp_dialog_factory_get_singleton (),
"gimp-indexed-palette");
if (widget)
{
GimpColormapEditor *editor;
editor = GIMP_COLORMAP_EDITOR (gtk_bin_get_child (GTK_BIN (widget)));
gimp_colormap_editor_set_index (editor, color_index, NULL);
}
}
if (TRUE)
{
widget = gimp_dialog_factory_find_widget (gimp_dialog_factory_get_singleton (),
"gimp-palette-editor");
if (widget)
{
GimpPaletteEditor *editor;
gint index;
editor = GIMP_PALETTE_EDITOR (gtk_bin_get_child (GTK_BIN (widget)));
index = gimp_palette_editor_get_index (editor, color);
if (index != -1)
gimp_palette_editor_set_index (editor, index, NULL);
}
}
}
switch (color_tool->pick_mode)
{
case GIMP_COLOR_PICK_MODE_NONE:
break;
case GIMP_COLOR_PICK_MODE_FOREGROUND:
gimp_context_set_foreground (context, color);
break;
case GIMP_COLOR_PICK_MODE_BACKGROUND:
gimp_context_set_background (context, color);
break;
case GIMP_COLOR_PICK_MODE_PALETTE:
{
GimpDisplayShell *shell = gimp_display_get_shell (tool->display);
GdkScreen *screen = gtk_widget_get_screen (GTK_WIDGET (shell));
GtkWidget *dockable;
dockable =
gimp_window_strategy_show_dockable_dialog (GIMP_WINDOW_STRATEGY (gimp_get_window_strategy (tool->display->gimp)),
tool->display->gimp,
gimp_dialog_factory_get_singleton (),
screen,
"gimp-palette-editor");
if (dockable)
{
GtkWidget *palette_editor;
GimpData *data;
/* don't blink like mad when updating */
if (pick_state == GIMP_COLOR_PICK_STATE_UPDATE)
gimp_dockable_blink_cancel (GIMP_DOCKABLE (dockable));
palette_editor = gtk_bin_get_child (GTK_BIN (dockable));
data = gimp_data_editor_get_data (GIMP_DATA_EDITOR (palette_editor));
if (! data)
{
data = GIMP_DATA (gimp_context_get_palette (context));
gimp_data_editor_set_data (GIMP_DATA_EDITOR (palette_editor),
data);
}
gimp_palette_editor_pick_color (GIMP_PALETTE_EDITOR (palette_editor),
color, pick_state);
}
}
break;
}
}
static void
gimp_color_frame_update (GimpColorFrame *frame)
{
const gchar *names[GIMP_COLOR_FRAME_ROWS] = { NULL, };
gchar **values = NULL;
gboolean has_alpha;
gint i;
has_alpha = babl_format_has_alpha (frame->sample_format);
if (frame->sample_valid)
{
gimp_color_area_set_color (GIMP_COLOR_AREA (frame->color_area),
&frame->color);
}
switch (frame->frame_mode)
{
case GIMP_COLOR_FRAME_MODE_PIXEL:
{
GimpImageBaseType base_type;
base_type = gimp_babl_format_get_base_type (frame->sample_format);
if (frame->sample_valid)
{
const Babl *print_format = NULL;
guchar print_pixel[32];
switch (gimp_babl_format_get_precision (frame->sample_format))
{
case GIMP_PRECISION_U8_GAMMA:
if (babl_format_is_palette (frame->sample_format))
{
print_format = gimp_babl_format (GIMP_RGB,
GIMP_PRECISION_U8_GAMMA,
has_alpha);
break;
}
/* else fall thru */
case GIMP_PRECISION_U8_LINEAR:
case GIMP_PRECISION_U16_LINEAR:
case GIMP_PRECISION_U16_GAMMA:
case GIMP_PRECISION_U32_LINEAR:
case GIMP_PRECISION_U32_GAMMA:
case GIMP_PRECISION_FLOAT_LINEAR:
case GIMP_PRECISION_FLOAT_GAMMA:
case GIMP_PRECISION_DOUBLE_LINEAR:
case GIMP_PRECISION_DOUBLE_GAMMA:
print_format = frame->sample_format;
break;
case GIMP_PRECISION_HALF_GAMMA:
print_format = gimp_babl_format (base_type,
GIMP_PRECISION_FLOAT_GAMMA,
has_alpha);
break;
case GIMP_PRECISION_HALF_LINEAR:
print_format = gimp_babl_format (base_type,
GIMP_PRECISION_FLOAT_LINEAR,
has_alpha);
break;
}
if (frame->sample_average)
{
/* FIXME: this is broken: can't use the averaged sRGB GimpRGB
* value for displaying pixel values when color management
* is enabled
*/
gimp_rgba_get_pixel (&frame->color, print_format, print_pixel);
}
else
{
babl_process (babl_fish (frame->sample_format, print_format),
frame->pixel, print_pixel, 1);
}
values = gimp_babl_print_pixel (print_format, print_pixel);
}
if (base_type == GIMP_GRAY)
{
names[0] = _("Value:");
if (has_alpha)
names[1] = _("Alpha:");
}
else
{
names[0] = _("Red:");
names[1] = _("Green:");
names[2] = _("Blue:");
if (has_alpha)
names[3] = _("Alpha:");
if (babl_format_is_palette (frame->sample_format))
{
names[4] = _("Index:");
if (frame->sample_valid)
{
gchar **v = g_new0 (gchar *, 6);
gchar **tmp = values;
memcpy (v, values, 4 * sizeof (gchar *));
values = v;
g_free (tmp);
if (! frame->sample_average)
values[4] = g_strdup_printf ("%d", frame->pixel[0]);
}
}
}
}
/**
* gimp_color_profile_get_format:
* @format: a #Babl format
* @lcms_format: return location for an lcms format
*
* This function takes a #Babl format and returns the lcms format to
* be used with that @format. It also returns a #Babl format to be
* used instead of the passed @format, which usually is the same as
* @format, unless lcms doesn't support @format.
*
* Note that this function currently only supports RGB, RGBA, R'G'B',
* R'G'B'A, Y, YA, Y', Y'A and the cairo-RGB24 and cairo-ARGB32 formats.
*
* Return value: the #Babl format to be used instead of @format, or %NULL
* is the passed @format is not supported at all.
*
* Since: 2.10
**/
const Babl *
gimp_color_profile_get_format (const Babl *format,
guint32 *lcms_format)
{
const Babl *output_format = NULL;
const Babl *type;
const Babl *model;
gboolean has_alpha;
gboolean gray;
gboolean linear;
g_return_val_if_fail (format != NULL, NULL);
g_return_val_if_fail (lcms_format != NULL, NULL);
has_alpha = babl_format_has_alpha (format);
type = babl_format_get_type (format, 0);
model = babl_format_get_model (format);
if (format == babl_format ("cairo-RGB24"))
{
*lcms_format = TYPE_RGB_8;
return babl_format ("R'G'B' u8");
}
else if (format == babl_format ("cairo-ARGB32"))
{
*lcms_format = TYPE_RGBA_8;
return babl_format ("R'G'B'A u8");
}
else if (model == babl_model ("RGB") ||
model == babl_model ("RGBA"))
{
gray = FALSE;
linear = TRUE;
}
else if (model == babl_model ("R'G'B'") ||
model == babl_model ("R'G'B'A"))
{
gray = FALSE;
linear = FALSE;
}
else if (model == babl_model ("Y") ||
model == babl_model ("YA"))
{
gray = TRUE;
linear = TRUE;
}
else if (model == babl_model ("Y'") ||
model == babl_model ("Y'A"))
{
gray = TRUE;
linear = FALSE;
}
else if (babl_format_is_palette (format))
{
if (has_alpha)
{
*lcms_format = TYPE_RGBA_8;
return babl_format ("R'G'B'A u8");
}
else
{
*lcms_format = TYPE_RGB_8;
return babl_format ("R'G'B' u8");
}
}
else
{
g_printerr ("format: %s\n"
"has_alpha = %s\n"
"type = %s\n"
"model = %s\n",
babl_get_name (format),
has_alpha ? "TRUE" : "FALSE",
babl_get_name (type),
babl_get_name (model));
g_return_val_if_reached (NULL);
}
*lcms_format = 0;
if (type == babl_type ("u8"))
{
if (has_alpha)
{
if (gray)
*lcms_format = TYPE_GRAYA_8;
else
*lcms_format = TYPE_RGBA_8;
}
else
{
if (gray)
*lcms_format = TYPE_GRAY_8;
else
*lcms_format = TYPE_RGB_8;
}
output_format = format;
}
else if (type == babl_type ("u16"))
{
if (has_alpha)
{
if (gray)
*lcms_format = TYPE_GRAYA_16;
else
*lcms_format = TYPE_RGBA_16;
}
else
{
if (gray)
*lcms_format = TYPE_GRAY_16;
else
*lcms_format = TYPE_RGB_16;
}
output_format = format;
}
else if (type == babl_type ("half")) /* 16-bit floating point (half) */
{
if (has_alpha)
{
if (gray)
*lcms_format = TYPE_GRAYA_HALF_FLT;
else
*lcms_format = TYPE_RGBA_HALF_FLT;
}
else
{
if (gray)
*lcms_format = TYPE_GRAY_HALF_FLT;
else
*lcms_format = TYPE_RGB_HALF_FLT;
}
output_format = format;
}
else if (type == babl_type ("float"))
{
if (has_alpha)
{
if (gray)
*lcms_format = TYPE_GRAYA_FLT;
else
*lcms_format = TYPE_RGBA_FLT;
}
else
{
if (gray)
*lcms_format = TYPE_GRAY_FLT;
else
*lcms_format = TYPE_RGB_FLT;
}
output_format = format;
}
else if (type == babl_type ("double"))
{
if (has_alpha)
{
if (gray)
*lcms_format = TYPE_GRAYA_DBL;
else
*lcms_format = TYPE_RGBA_DBL;
}
else
{
if (gray)
*lcms_format = TYPE_GRAY_DBL;
else
*lcms_format = TYPE_RGB_DBL;
}
output_format = format;
}
if (*lcms_format == 0)
{
g_printerr ("%s: layer format %s not supported, "
"falling back to float\n",
G_STRFUNC, babl_get_name (format));
if (has_alpha)
{
if (gray)
{
*lcms_format = TYPE_GRAYA_FLT;
if (linear)
output_format = babl_format ("YA float");
else
output_format = babl_format ("Y'A float");
}
else
{
*lcms_format = TYPE_RGBA_FLT;
if (linear)
output_format = babl_format ("RGBA float");
else
output_format = babl_format ("R'G'B'A float");
}
}
else
{
if (gray)
{
*lcms_format = TYPE_GRAY_FLT;
if (linear)
output_format = babl_format ("Y float");
else
output_format = babl_format ("Y' float");
}
else
{
*lcms_format = TYPE_RGB_FLT;
if (linear)
output_format = babl_format ("RGB float");
else
output_format = babl_format ("R'G'B' float");
}
}
}
return output_format;
}
void
gimp_gegl_convolve (GeglBuffer *src_buffer,
const GeglRectangle *src_rect,
GeglBuffer *dest_buffer,
const GeglRectangle *dest_rect,
const gfloat *kernel,
gint kernel_size,
gdouble divisor,
GimpConvolutionType mode,
gboolean alpha_weighting)
{
GeglBufferIterator *iter;
GeglRectangle *src_roi;
GeglRectangle *dest_roi;
const Babl *src_format;
const Babl *dest_format;
gint src_components;
gint dest_components;
src_format = gegl_buffer_get_format (src_buffer);
if (babl_format_is_palette (src_format))
src_format = gimp_babl_format (GIMP_RGB,
GIMP_PRECISION_FLOAT_LINEAR,
babl_format_has_alpha (src_format));
else
src_format = gimp_babl_format (gimp_babl_format_get_base_type (src_format),
GIMP_PRECISION_FLOAT_LINEAR,
babl_format_has_alpha (src_format));
dest_format = gegl_buffer_get_format (dest_buffer);
if (babl_format_is_palette (dest_format))
dest_format = gimp_babl_format (GIMP_RGB,
GIMP_PRECISION_FLOAT_LINEAR,
babl_format_has_alpha (dest_format));
else
dest_format = gimp_babl_format (gimp_babl_format_get_base_type (dest_format),
GIMP_PRECISION_FLOAT_LINEAR,
babl_format_has_alpha (dest_format));
src_components = babl_format_get_n_components (src_format);
dest_components = babl_format_get_n_components (dest_format);
iter = gegl_buffer_iterator_new (src_buffer, src_rect, 0, src_format,
GEGL_BUFFER_READ, GEGL_ABYSS_NONE);
src_roi = &iter->roi[0];
gegl_buffer_iterator_add (iter, dest_buffer, dest_rect, 0, dest_format,
GEGL_BUFFER_WRITE, GEGL_ABYSS_NONE);
dest_roi = &iter->roi[1];
while (gegl_buffer_iterator_next (iter))
{
/* Convolve the src image using the convolution kernel, writing
* to dest Convolve is not tile-enabled--use accordingly
*/
const gfloat *src = iter->data[0];
gfloat *dest = iter->data[1];
const gint components = src_components;
const gint a_component = components - 1;
const gint rowstride = src_components * src_roi->width;
const gint margin = kernel_size / 2;
const gint x1 = src_roi->x;
const gint y1 = src_roi->y;
const gint x2 = src_roi->x + src_roi->width - 1;
const gint y2 = src_roi->y + src_roi->height - 1;
gint x, y;
gfloat offset;
/* If the mode is NEGATIVE_CONVOL, the offset should be 128 */
if (mode == GIMP_NEGATIVE_CONVOL)
{
offset = 0.5;
mode = GIMP_NORMAL_CONVOL;
}
else
{
offset = 0.0;
}
for (y = 0; y < dest_roi->height; y++)
{
gfloat *d = dest;
if (alpha_weighting)
{
for (x = 0; x < dest_roi->width; x++)
{
const gfloat *m = kernel;
gdouble total[4] = { 0.0, 0.0, 0.0, 0.0 };
gdouble weighted_divisor = 0.0;
gint i, j, b;
for (j = y - margin; j <= y + margin; j++)
{
for (i = x - margin; i <= x + margin; i++, m++)
{
gint xx = CLAMP (i, x1, x2);
gint yy = CLAMP (j, y1, y2);
const gfloat *s = src + yy * rowstride + xx * components;
const gfloat a = s[a_component];
if (a)
{
gdouble mult_alpha = *m * a;
weighted_divisor += mult_alpha;
for (b = 0; b < a_component; b++)
total[b] += mult_alpha * s[b];
total[a_component] += mult_alpha;
}
}
}
if (weighted_divisor == 0.0)
weighted_divisor = divisor;
for (b = 0; b < a_component; b++)
total[b] /= weighted_divisor;
total[a_component] /= divisor;
for (b = 0; b < components; b++)
{
total[b] += offset;
if (mode != GIMP_NORMAL_CONVOL && total[b] < 0.0)
total[b] = - total[b];
*d++ = CLAMP (total[b], 0.0, 1.0);
}
}
}
else
{
for (x = 0; x < dest_roi->width; x++)
{
const gfloat *m = kernel;
gdouble total[4] = { 0.0, 0.0, 0.0, 0.0 };
gint i, j, b;
for (j = y - margin; j <= y + margin; j++)
{
for (i = x - margin; i <= x + margin; i++, m++)
{
gint xx = CLAMP (i, x1, x2);
gint yy = CLAMP (j, y1, y2);
const gfloat *s = src + yy * rowstride + xx * components;
for (b = 0; b < components; b++)
total[b] += *m * s[b];
}
}
for (b = 0; b < components; b++)
{
total[b] = total[b] / divisor + offset;
if (mode != GIMP_NORMAL_CONVOL && total[b] < 0.0)
total[b] = - total[b];
total[b] = CLAMP (total[b], 0.0, 1.0);
}
}
}
dest += dest_roi->width * dest_components;
}
}
}
void
gimp_histogram_calculate (GimpHistogram *histogram,
GeglBuffer *buffer,
const GeglRectangle *buffer_rect,
GeglBuffer *mask,
const GeglRectangle *mask_rect)
{
GeglBufferIterator *iter;
const Babl *format;
gint n_components;
g_return_if_fail (histogram != NULL);
g_return_if_fail (GEGL_IS_BUFFER (buffer));
g_return_if_fail (buffer_rect != NULL);
format = gegl_buffer_get_format (buffer);
if (babl_format_is_palette (format))
format = gimp_babl_format (GIMP_RGB, GIMP_PRECISION_U8,
babl_format_has_alpha (format));
else
format = gimp_babl_format (gimp_babl_format_get_base_type (format),
GIMP_PRECISION_U8,
babl_format_has_alpha (format));
n_components = babl_format_get_n_components (format);
gimp_histogram_alloc_values (histogram, n_components);
iter = gegl_buffer_iterator_new (buffer, buffer_rect, 0, format,
GEGL_BUFFER_READ, GEGL_ABYSS_NONE);
if (mask)
gegl_buffer_iterator_add (iter, mask, mask_rect, 0,
babl_format ("Y float"),
GEGL_BUFFER_READ, GEGL_ABYSS_NONE);
#define VALUE(c,i) (histogram->values[(c) * 256 + (i)])
while (gegl_buffer_iterator_next (iter))
{
const guchar *data = iter->data[0];
gint max;
if (mask)
{
const gfloat *mask_data = iter->data[1];
switch (n_components)
{
case 1:
while (iter->length)
{
const gdouble masked = *mask_data;
VALUE (0, data[0]) += masked;
data += n_components;
mask_data += 1;
}
break;
case 2:
while (iter->length--)
{
const gdouble masked = *mask_data;
const gdouble weight = data[1] / 255.0;
VALUE (0, data[0]) += weight * masked;
VALUE (1, data[1]) += masked;
data += n_components;
mask_data += 1;
}
break;
case 3: /* calculate separate value values */
while (iter->length--)
{
const gdouble masked = *mask_data;
VALUE (1, data[0]) += masked;
VALUE (2, data[1]) += masked;
VALUE (3, data[2]) += masked;
max = MAX (data[0], data[1]);
max = MAX (data[2], max);
VALUE (0, max) += masked;
data += n_components;
mask_data += 1;
}
break;
case 4: /* calculate separate value values */
while (iter->length--)
{
const gdouble masked = *mask_data;
const gdouble weight = data[3] / 255.0;
VALUE (1, data[0]) += weight * masked;
VALUE (2, data[1]) += weight * masked;
VALUE (3, data[2]) += weight * masked;
VALUE (4, data[3]) += masked;
max = MAX (data[0], data[1]);
max = MAX (data[2], max);
VALUE (0, max) += weight * masked;
data += n_components;
mask_data += 1;
}
break;
}
}
else /* no mask */
{
switch (n_components)
{
case 1:
while (iter->length--)
{
VALUE (0, data[0]) += 1.0;
data += n_components;
}
break;
case 2:
while (iter->length--)
{
const gdouble weight = data[1] / 255;
VALUE (0, data[0]) += weight;
VALUE (1, data[1]) += 1.0;
data += n_components;
}
break;
case 3: /* calculate separate value values */
while (iter->length--)
{
VALUE (1, data[0]) += 1.0;
VALUE (2, data[1]) += 1.0;
VALUE (3, data[2]) += 1.0;
max = MAX (data[0], data[1]);
max = MAX (data[2], max);
VALUE (0, max) += 1.0;
data += n_components;
}
break;
case 4: /* calculate separate value values */
while (iter->length--)
{
const gdouble weight = data[3] / 255;
VALUE (1, data[0]) += weight;
VALUE (2, data[1]) += weight;
VALUE (3, data[2]) += weight;
VALUE (4, data[3]) += 1.0;
max = MAX (data[0], data[1]);
max = MAX (data[2], max);
VALUE (0, max) += weight;
data += n_components;
}
break;
}
}
}
#undef VALUE
}