dnrops
/
gimp
mirror of https://github.com/GNOME/gimp.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
gimp/libgimpwidgets/gimpcolorarea.c

1094 lines
35 KiB
C
Raw Permalink Blame History

/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpcolorarea.c
* Copyright (C) 2001-2002 Sven Neumann <sven@gimp.org>
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpcolor/gimpcolor.h"
#include "libgimpconfig/gimpconfig.h"
#include "gimpwidgetstypes.h"
#include "gimpcairo-utils.h"
#include "gimpcolorarea.h"
#include "gimpwidgetsutils.h"
#include "gimpwidgets-private.h"
/**
* SECTION: gimpcolorarea
* @title: GimpColorArea
* @short_description: Displays a [class@Gegl.Color], optionally with
* alpha-channel.
*
* Displays a [class@Gegl.Color], optionally with alpha-channel.
**/
#define DRAG_PREVIEW_SIZE 32
#define DRAG_ICON_OFFSET -8
enum
{
COLOR_CHANGED,
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_COLOR,
PROP_TYPE,
PROP_DRAG_MASK,
PROP_DRAW_BORDER
};
struct _GimpColorArea
{
GtkDrawingArea parent_instance;
GimpColorConfig *config;
GimpColorTransform *transform;
guchar *buf;
guint width;
guint height;
guint rowstride;
GimpColorAreaType type;
GeglColor *color;
guint draw_border : 1;
guint needs_render : 1;
gboolean out_of_gamut;
};
static void gimp_color_area_dispose (GObject *object);
static void gimp_color_area_finalize (GObject *object);
static void gimp_color_area_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_color_area_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_color_area_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static gboolean gimp_color_area_draw (GtkWidget *widget,
cairo_t *cr);
static void gimp_color_area_render_buf (GtkWidget *widget,
GimpColorAreaType type,
guchar *buf,
guint width,
guint height,
guint rowstride,
GeglColor *color);
static void gimp_color_area_render (GimpColorArea *area);
static void gimp_color_area_drag_begin (GtkWidget *widget,
GdkDragContext *context);
static void gimp_color_area_drag_end (GtkWidget *widget,
GdkDragContext *context);
static void gimp_color_area_drag_data_received (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
GtkSelectionData *selection_data,
guint info,
guint time);
static void gimp_color_area_drag_data_get (GtkWidget *widget,
GdkDragContext *context,
GtkSelectionData *selection_data,
guint info,
guint time);
static void gimp_color_area_create_transform (GimpColorArea *area);
static void gimp_color_area_destroy_transform (GimpColorArea *area);
G_DEFINE_TYPE (GimpColorArea, gimp_color_area, GTK_TYPE_DRAWING_AREA)
#define parent_class gimp_color_area_parent_class
static guint gimp_color_area_signals[LAST_SIGNAL] = { 0 };
static const GtkTargetEntry target = { "application/x-color", 0 };
static void
gimp_color_area_class_init (GimpColorAreaClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
gimp_color_area_signals[COLOR_CHANGED] =
g_signal_new ("color-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
0,
NULL, NULL, NULL,
G_TYPE_NONE, 0);
object_class->dispose = gimp_color_area_dispose;
object_class->finalize = gimp_color_area_finalize;
object_class->get_property = gimp_color_area_get_property;
object_class->set_property = gimp_color_area_set_property;
widget_class->size_allocate = gimp_color_area_size_allocate;
widget_class->draw = gimp_color_area_draw;
widget_class->drag_begin = gimp_color_area_drag_begin;
widget_class->drag_end = gimp_color_area_drag_end;
widget_class->drag_data_received = gimp_color_area_drag_data_received;
widget_class->drag_data_get = gimp_color_area_drag_data_get;
babl_init ();
/**
* GimpColorArea:color:
*
* The color displayed in the color area.
*
* Since: 2.4
*/
g_object_class_install_property (object_class, PROP_COLOR,
gimp_param_spec_color_from_string ("color",
"Color",
"The displayed color",
TRUE, "black",
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
/**
* GimpColorArea:type:
*
* The type of the color area.
*
* Since: 2.4
*/
g_object_class_install_property (object_class, PROP_TYPE,
g_param_spec_enum ("type",
"Type",
"The type of the color area",
GIMP_TYPE_COLOR_AREA_TYPE,
GIMP_COLOR_AREA_FLAT,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
/**
* GimpColorArea:drag-type:
*
* The modifier mask that should trigger drags.
*
* Since: 2.4
*/
g_object_class_install_property (object_class, PROP_DRAG_MASK,
g_param_spec_flags ("drag-mask",
"Drag Mask",
"The modifier mask that triggers dragging the color",
GDK_TYPE_MODIFIER_TYPE,
0,
GIMP_PARAM_WRITABLE));
/**
* GimpColorArea:draw-border:
*
* Whether to draw a thin border in the foreground color around the area.
*
* Since: 2.4
*/
g_object_class_install_property (object_class, PROP_DRAW_BORDER,
g_param_spec_boolean ("draw-border",
"Draw Border",
"Whether to draw a thin border in the foreground color around the area",
FALSE,
GIMP_PARAM_READWRITE));
}
static void
gimp_color_area_init (GimpColorArea *area)
{
area->buf = NULL;
area->width = 0;
area->height = 0;
area->rowstride = 0;
area->draw_border = FALSE;
area->color = gegl_color_new ("black");
gtk_drag_dest_set (GTK_WIDGET (area),
GTK_DEST_DEFAULT_HIGHLIGHT |
GTK_DEST_DEFAULT_MOTION |
GTK_DEST_DEFAULT_DROP,
&target, 1,
GDK_ACTION_COPY);
gimp_widget_track_monitor (GTK_WIDGET (area),
G_CALLBACK (gimp_color_area_destroy_transform),
NULL, NULL);
}
static void
gimp_color_area_dispose (GObject *object)
{
GimpColorArea *area = GIMP_COLOR_AREA (object);
gimp_color_area_set_color_config (area, NULL);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gimp_color_area_finalize (GObject *object)
{
GimpColorArea *area = GIMP_COLOR_AREA (object);
g_clear_pointer (&area->buf, g_free);
g_clear_object (&area->color);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_color_area_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpColorArea *area = GIMP_COLOR_AREA (object);
switch (property_id)
{
case PROP_COLOR:
g_value_set_object (value, area->color);
break;
case PROP_TYPE:
g_value_set_enum (value, area->type);
break;
case PROP_DRAW_BORDER:
g_value_set_boolean (value, area->draw_border);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_color_area_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpColorArea *area = GIMP_COLOR_AREA (object);
GdkModifierType drag_mask;
switch (property_id)
{
case PROP_COLOR:
gimp_color_area_set_color (area, g_value_get_object (value));
break;
case PROP_TYPE:
gimp_color_area_set_type (area, g_value_get_enum (value));
break;
case PROP_DRAG_MASK:
drag_mask = g_value_get_flags (value) & (GDK_BUTTON1_MASK |
GDK_BUTTON2_MASK |
GDK_BUTTON3_MASK);
if (drag_mask)
gtk_drag_source_set (GTK_WIDGET (area),
drag_mask,
&target, 1,
GDK_ACTION_COPY | GDK_ACTION_MOVE);
else
gtk_drag_source_unset (GTK_WIDGET (area));
break;
case PROP_DRAW_BORDER:
gimp_color_area_set_draw_border (area, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_color_area_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GimpColorArea *area = GIMP_COLOR_AREA (widget);
GTK_WIDGET_CLASS (parent_class)->size_allocate (widget, allocation);
if (allocation->width != area->width ||
allocation->height != area->height)
{
area->width = allocation->width;
area->height = allocation->height;
area->rowstride = area->width * 4 + 4;
g_free (area->buf);
area->buf = g_new (guchar, area->rowstride * area->height);
area->needs_render = TRUE;
}
}
static gboolean
gimp_color_area_draw (GtkWidget *widget,
cairo_t *cr)
{
GimpColorArea *area = GIMP_COLOR_AREA (widget);
GtkStyleContext *context = gtk_widget_get_style_context (widget);
cairo_surface_t *buffer;
gboolean oog = area->out_of_gamut;
if (! area->buf)
return FALSE;
if (area->needs_render)
gimp_color_area_render (area);
if (! area->transform)
gimp_color_area_create_transform (area);
if (area->transform)
{
const Babl *format = babl_format ("cairo-RGB24");
guchar *buf = g_new (guchar, area->rowstride * area->height);
guchar *src = area->buf;
guchar *dest = buf;
guint i;
for (i = 0; i < area->height; i++)
{
gimp_color_transform_process_pixels (area->transform,
format, src,
format, dest,
area->width);
src += area->rowstride;
dest += area->rowstride;
}
buffer = cairo_image_surface_create_for_data (buf,
CAIRO_FORMAT_RGB24,
area->width,
area->height,
area->rowstride);
cairo_surface_set_user_data (buffer, NULL,
buf, (cairo_destroy_func_t) g_free);
}
else
{
buffer = cairo_image_surface_create_for_data (area->buf,
CAIRO_FORMAT_RGB24,
area->width,
area->height,
area->rowstride);
}
cairo_set_source_surface (cr, buffer, 0.0, 0.0);
cairo_surface_destroy (buffer);
if (! gtk_widget_is_sensitive (widget))
{
static cairo_pattern_t *pattern = NULL;
if (! pattern)
{
static const guchar stipple[] = { 0, 255, 0, 0,
255, 0, 0, 0 };
cairo_surface_t *surface;
gint stride;
stride = cairo_format_stride_for_width (CAIRO_FORMAT_A8, 2);
surface = cairo_image_surface_create_for_data ((guchar *) stipple,
CAIRO_FORMAT_A8,
2, 2, stride);
pattern = cairo_pattern_create_for_surface (surface);
cairo_surface_destroy (surface);
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
}
cairo_mask (cr, pattern);
}
else
{
cairo_paint (cr);
}
if (area->config && ! oog)
oog = gimp_color_is_out_of_self_gamut (area->color);
if (area->config && oog)
{
GeglColor *oog_color;
gint side = MIN (area->width, area->height) * 2 / 3;
cairo_move_to (cr, area->width, 0);
cairo_line_to (cr, area->width - side, 0);
cairo_line_to (cr, area->width, side);
cairo_line_to (cr, area->width, 0);
oog_color = gimp_color_config_get_out_of_gamut_color (area->config);
gimp_cairo_set_source_color (cr, oog_color, area->config, FALSE, widget);
cairo_fill (cr);
g_object_unref (oog_color);
}
if (area->draw_border)
{
GdkRGBA color;
cairo_set_line_width (cr, 1.0);
gtk_style_context_get_color (context, gtk_widget_get_state_flags (widget),
&color);
gdk_cairo_set_source_rgba (cr, &color);
cairo_rectangle (cr, 0.5, 0.5, area->width - 1, area->height - 1);
cairo_stroke (cr);
}
return FALSE;
}
/**
* gimp_color_area_new:
* @color: A pointer to a [class@Gegl.Color].
* @type: The type of color area to create.
* @drag_mask: The event_mask that should trigger drags.
*
* Creates a new #GimpColorArea widget.
*
* This returns a preview area showing the color. It handles color
* DND. If the color changes, the "color_changed" signal is emitted.
*
* Returns: Pointer to the new #GimpColorArea widget.
**/
GtkWidget *
gimp_color_area_new (GeglColor *color,
GimpColorAreaType type,
GdkModifierType drag_mask)
{
return g_object_new (GIMP_TYPE_COLOR_AREA,
"color", color,
"type", type,
"drag-mask", drag_mask,
NULL);
}
/**
* gimp_color_area_set_color:
* @area: Pointer to a #GimpColorArea.
* @color: Pointer to a [class@Gegl.Color] that defines the new color.
*
* Sets @area to a different @color.
**/
void
gimp_color_area_set_color (GimpColorArea *area,
GeglColor *color)
{
g_return_if_fail (GIMP_IS_COLOR_AREA (area));
g_return_if_fail (GEGL_IS_COLOR (color));
if (! gimp_color_is_perceptually_identical (area->color, color))
{
area->needs_render = TRUE;
gtk_widget_queue_draw (GTK_WIDGET (area));
}
color = gegl_color_duplicate (color);
g_clear_object (&area->color);
area->color = color;
g_object_notify (G_OBJECT (area), "color");
g_signal_emit (area, gimp_color_area_signals[COLOR_CHANGED], 0);
}
/**
* gimp_color_area_get_color:
* @area: Pointer to a #GimpColorArea.
*
* Retrieves the current color of the @area.
*
* Returns: (transfer full): a copy of the [class@Gegl.Color] displayed in
* @area.
**/
GeglColor *
gimp_color_area_get_color (GimpColorArea *area)
{
g_return_val_if_fail (GIMP_IS_COLOR_AREA (area), NULL);
return gegl_color_duplicate (area->color);
}
/**
* gimp_color_area_has_alpha:
* @area: Pointer to a #GimpColorArea.
*
* Checks whether the @area shows transparency information. This is determined
* via the @area's #GimpColorAreaType.
*
* Returns: %TRUE if @area shows transparency information, %FALSE otherwise.
**/
gboolean
gimp_color_area_has_alpha (GimpColorArea *area)
{
g_return_val_if_fail (GIMP_IS_COLOR_AREA (area), FALSE);
return area->type != GIMP_COLOR_AREA_FLAT;
}
/**
* gimp_color_area_set_type:
* @area: Pointer to a #GimpColorArea.
* @type: A #GimpColorAreaType.
*
* Changes the type of @area. The #GimpColorAreaType determines
* whether the widget shows transparency information and chooses the
* size of the checkerboard used to do that.
**/
void
gimp_color_area_set_type (GimpColorArea *area,
GimpColorAreaType type)
{
g_return_if_fail (GIMP_IS_COLOR_AREA (area));
if (area->type != type)
{
area->type = type;
area->needs_render = TRUE;
gtk_widget_queue_draw (GTK_WIDGET (area));
g_object_notify (G_OBJECT (area), "type");
}
}
/**
* gimp_color_area_enable_drag:
* @area: A #GimpColorArea.
* @drag_mask: The bitmask of buttons that can start the drag.
*
* Allows dragging the color displayed with buttons identified by
* @drag_mask. The drag supports targets of type "application/x-color".
*
* Note that setting a @drag_mask of 0 disables the drag ability.
**/
void
gimp_color_area_enable_drag (GimpColorArea *area,
GdkModifierType drag_mask)
{
g_return_if_fail (GIMP_IS_COLOR_AREA (area));
g_object_set (area,
"drag-mask", drag_mask,
NULL);
}
/**
* gimp_color_area_set_draw_border:
* @area: Pointer to a #GimpColorArea.
* @draw_border: whether to draw a border or not
*
* The @area can draw a thin border in the foreground color around
* itself. This function toggles this behavior on and off. The
* default is not draw a border.
**/
void
gimp_color_area_set_draw_border (GimpColorArea *area,
gboolean draw_border)
{
g_return_if_fail (GIMP_IS_COLOR_AREA (area));
draw_border = draw_border ? TRUE : FALSE;
if (area->draw_border != draw_border)
{
area->draw_border = draw_border;
gtk_widget_queue_draw (GTK_WIDGET (area));
g_object_notify (G_OBJECT (area), "draw-border");
}
}
/**
* gimp_color_area_set_out_of_gamut:
* @area: a #GimpColorArea widget.
* @out_of_gamut: whether to show an out-of-gamut indicator
*
* Sets the color area to render as an out-of-gamut color, i.e. with a
* small triangle on a corner using the color management out of gamut
* color (as per gimp_color_area_set_color_config()).
*
* By default, @area will render as out-of-gamut for any RGB color with
* a channel out of the [0; 1] range. This function allows to consider
* more colors out of gamut (for instance non-gray colors on a grayscale
* image, or colors absent of palettes in indexed images, etc.)
*
* Since: 2.10.10
*/
void
gimp_color_area_set_out_of_gamut (GimpColorArea *area,
gboolean out_of_gamut)
{
g_return_if_fail (GIMP_IS_COLOR_AREA (area));
if (area->out_of_gamut != out_of_gamut)
{
area->out_of_gamut = out_of_gamut;
gtk_widget_queue_draw (GTK_WIDGET (area));
}
}
/**
* gimp_color_area_set_color_config:
* @area: a #GimpColorArea widget.
* @config: a #GimpColorConfig object.
*
* Sets the color management configuration to use with this color area.
*
* Since: 2.10
*/
void
gimp_color_area_set_color_config (GimpColorArea *area,
GimpColorConfig *config)
{
g_return_if_fail (GIMP_IS_COLOR_AREA (area));
g_return_if_fail (config == NULL || GIMP_IS_COLOR_CONFIG (config));
if (config != area->config)
{
if (area->config)
{
g_signal_handlers_disconnect_by_func (area->config,
gimp_color_area_destroy_transform,
area);
gimp_color_area_destroy_transform (area);
}
g_set_object (&area->config, config);
if (area->config)
{
g_signal_connect_swapped (area->config, "notify",
G_CALLBACK (gimp_color_area_destroy_transform),
area);
}
}
}
/* private functions */
static void
gimp_color_area_render_buf (GtkWidget *widget,
GimpColorAreaType type,
guchar *buf,
guint width,
guint height,
guint rowstride,
GeglColor *color)
{
GimpColorArea *area = GIMP_COLOR_AREA (widget);
const Babl *render_space;
guint x, y;
guint check_size = 0;
guchar light[3];
guchar dark[3];
gdouble opaque_d[4];
guchar opaque[4];
guchar *p;
gdouble frac;
switch (type)
{
case GIMP_COLOR_AREA_FLAT:
check_size = 0;
break;
case GIMP_COLOR_AREA_SMALL_CHECKS:
check_size = GIMP_CHECK_SIZE_SM;
break;
case GIMP_COLOR_AREA_LARGE_CHECKS:
check_size = GIMP_CHECK_SIZE;
break;
}
render_space = gimp_widget_get_render_space (widget, area->config);
gegl_color_get_pixel (color, babl_format_with_space ("R'G'B'A u8", render_space), opaque);
gegl_color_get_pixel (color, babl_format_with_space ("R'G'B'A double", render_space), opaque_d);
if (check_size == 0 || opaque_d[3] == 1.0)
{
for (y = 0; y < height; y++)
{
p = buf + y * rowstride;
for (x = 0; x < width; x++)
{
GIMP_CAIRO_RGB24_SET_PIXEL (p,
opaque[0],
opaque[1],
opaque[2]);
p += 4;
}
}
return;
}
light[0] = (GIMP_CHECK_LIGHT +
(opaque_d[0] - GIMP_CHECK_LIGHT) * opaque_d[3]) * 255.999;
light[1] = (GIMP_CHECK_LIGHT +
(opaque_d[1] - GIMP_CHECK_LIGHT) * opaque_d[3]) * 255.999;
light[2] = (GIMP_CHECK_LIGHT +
(opaque_d[2] - GIMP_CHECK_LIGHT) * opaque_d[3]) * 255.999;
dark[0] = (GIMP_CHECK_DARK +
(opaque_d[0] - GIMP_CHECK_DARK) * opaque_d[3]) * 255.999;
dark[1] = (GIMP_CHECK_DARK +
(opaque_d[1] - GIMP_CHECK_DARK) * opaque_d[3]) * 255.999;
dark[2] = (GIMP_CHECK_DARK +
(opaque_d[2] - GIMP_CHECK_DARK) * opaque_d[3]) * 255.999;
/* TODO: should we get float data and render in CAIRO_FORMAT_RGBA128F rather
* than in CAIRO_FORMAT_RGB24?
*/
for (y = 0; y < height; y++)
{
p = buf + y * rowstride;
for (x = 0; x < width; x++)
{
if ((width - x) * height > y * width)
{
GIMP_CAIRO_RGB24_SET_PIXEL (p,
opaque[0],
opaque[1],
opaque[2]);
p += 4;
continue;
}
frac = y - (gdouble) ((width - x) * height) / (gdouble) width;
if (((x / check_size) ^ (y / check_size)) & 1)
{
if ((gint) frac)
{
GIMP_CAIRO_RGB24_SET_PIXEL (p,
light[0],
light[1],
light[2]);
}
else
{
GIMP_CAIRO_RGB24_SET_PIXEL (p,
((gdouble) light[0] * frac +
(gdouble) opaque[0] * (1.0 - frac)),
((gdouble) light[1] * frac +
(gdouble) opaque[1] * (1.0 - frac)),
((gdouble) light[2] * frac +
(gdouble) opaque[2] * (1.0 - frac)));
}
}
else
{
if ((gint) frac)
{
GIMP_CAIRO_RGB24_SET_PIXEL (p,
dark[0],
dark[1],
dark[2]);
}
else
{
GIMP_CAIRO_RGB24_SET_PIXEL (p,
((gdouble) dark[0] * frac +
(gdouble) opaque[0] * (1.0 - frac)),
((gdouble) dark[1] * frac +
(gdouble) opaque[1] * (1.0 - frac)),
((gdouble) dark[2] * frac +
(gdouble) opaque[2] * (1.0 - frac)));
}
}
p += 4;
}
}
}
static void
gimp_color_area_render (GimpColorArea *area)
{
if (! area->buf)
return;
gimp_color_area_render_buf (GTK_WIDGET (area),
area->type,
area->buf,
area->width, area->height, area->rowstride,
area->color);
area->needs_render = FALSE;
}
static void
gimp_color_area_drag_begin (GtkWidget *widget,
GdkDragContext *context)
{
GimpColorArea *area = GIMP_COLOR_AREA (widget);
GeglColor *color;
GtkWidget *window;
GtkWidget *frame;
GtkWidget *color_area;
window = gtk_window_new (GTK_WINDOW_POPUP);
gtk_window_set_type_hint (GTK_WINDOW (window), GDK_WINDOW_TYPE_HINT_DND);
gtk_window_set_screen (GTK_WINDOW (window), gtk_widget_get_screen (widget));
gtk_widget_realize (window);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
gtk_container_add (GTK_CONTAINER (window), frame);
color = gimp_color_area_get_color (GIMP_COLOR_AREA (widget));
color_area = gimp_color_area_new (color, area->type, 0);
g_object_unref (color);
gtk_widget_set_size_request (color_area,
DRAG_PREVIEW_SIZE, DRAG_PREVIEW_SIZE);
gtk_container_add (GTK_CONTAINER (frame), color_area);
gtk_widget_show (color_area);
gtk_widget_show (frame);
g_object_set_data_full (G_OBJECT (widget),
"gimp-color-area-drag-window",
window,
(GDestroyNotify) gtk_widget_destroy);
gtk_drag_set_icon_widget (context, window,
DRAG_ICON_OFFSET, DRAG_ICON_OFFSET);
}
static void
gimp_color_area_drag_end (GtkWidget *widget,
GdkDragContext *context)
{
g_object_set_data (G_OBJECT (widget),
"gimp-color-area-drag-window", NULL);
}
static void
gimp_color_area_drag_data_received (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
GtkSelectionData *selection_data,
guint info,
guint time)
{
GimpColorArea *area = GIMP_COLOR_AREA (widget);
GeglColor *color;
const guchar *data;
gint data_length;
const Babl *format;
const gchar *encoding;
gint encoding_length;
const guchar *pixel;
gint pixel_length;
const guint8 *profile_data = NULL;
int profile_length = 0;
if (selection_data == NULL)
{
g_warning ("%s: received invalid color data", G_STRFUNC);
return;
}
data = gtk_selection_data_get_data (selection_data);
data_length = gtk_selection_data_get_length (selection_data);
encoding = (const gchar *) data;
encoding_length = strlen (encoding) + 1;
if (! babl_format_exists ((const char *) data))
{
g_critical ("%s: received invalid color format: \"%s\"!", G_STRFUNC, encoding);
return;
}
format = babl_format (encoding);
pixel_length = babl_format_get_bytes_per_pixel (format);
if (data_length < encoding_length + pixel_length)
{
g_critical ("%s: received invalid color data of %d bytes "
"(expected: %d bytes or more)!",
G_STRFUNC, data_length, encoding_length + pixel_length);
return;
}
pixel = data + encoding_length;
profile_length = data_length - encoding_length - pixel_length;
if (profile_length > 0)
{
GimpColorProfile *profile;
GError *error = NULL;
profile_data = pixel + pixel_length;
profile = gimp_color_profile_new_from_icc_profile (profile_data, profile_length, &error);
if (profile)
{
const Babl *space;
space = gimp_color_profile_get_space (profile,
GIMP_COLOR_RENDERING_INTENT_RELATIVE_COLORIMETRIC,
&error);
if (space)
{
format = babl_format_with_space (encoding, space);
}
else
{
g_warning ("%s: failed to create Babl space for profile: %s",
G_STRFUNC, error->message);
g_clear_error (&error);
}
g_object_unref (profile);
}
else
{
g_warning ("%s: received invalid profile data of %d bytes: %s",
G_STRFUNC, profile_length, error->message);
g_clear_error (&error);
}
}
color = gegl_color_new (NULL);
gegl_color_set_pixel (color, format, pixel);
gimp_color_area_set_color (area, color);
g_object_unref (color);
}
static void
gimp_color_area_drag_data_get (GtkWidget *widget,
GdkDragContext *context,
GtkSelectionData *selection_data,
guint info,
guint time)
{
GimpColorArea *area = GIMP_COLOR_AREA (widget);
const Babl *format;
const gchar *encoding;
gint encoding_length;
guchar pixel[40];
gint pixel_length;
guint8 *profile_data = NULL;
int profile_length = 0;
guchar *data;
gint data_length;
g_return_if_fail (selection_data != NULL);
g_return_if_fail (area->color != NULL);
format = gegl_color_get_format (area->color);
encoding = babl_format_get_encoding (format);
encoding_length = strlen (encoding) + 1;
pixel_length = babl_format_get_bytes_per_pixel (format);
gegl_color_get_pixel (area->color, format, pixel);
if (babl_format_get_space (format) != babl_space ("sRGB"))
profile_data = (guint8 *) babl_space_get_icc (babl_format_get_space (format),
&profile_length);
data_length = encoding_length + pixel_length + profile_length;
data = g_malloc0 (data_length);
memcpy (data, encoding, encoding_length);
memcpy (data + encoding_length, pixel, pixel_length);
if (profile_length > 0)
memcpy (data + encoding_length + pixel_length, profile_data, profile_length);
gtk_selection_data_set (selection_data,
gtk_selection_data_get_target (selection_data),
8, (const guchar *) data, data_length);
}
static void
gimp_color_area_create_transform (GimpColorArea *area)
{
if (area->config)
{
static GimpColorProfile *profile = NULL;
const Babl *format = babl_format ("cairo-RGB24");
if (G_UNLIKELY (! profile))
profile = gimp_color_profile_new_rgb_srgb ();
area->transform = gimp_widget_get_color_transform (GTK_WIDGET (area),
area->config,
profile,
format,
format,
NULL,
GIMP_COLOR_RENDERING_INTENT_RELATIVE_COLORIMETRIC,
FALSE);
}
}
static void
gimp_color_area_destroy_transform (GimpColorArea *area)
{
g_clear_object (&area->transform);
gtk_widget_queue_draw (GTK_WIDGET (area));
}
Reference in New Issue View Git Blame Copy Permalink