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gimp/app/tools/gimptexttool.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <gtk/gtk.h>
#include <pango/pangoft2.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "paint-funcs/paint-funcs.h"
#include "base/base-types.h"
#include "base/pixel-region.h"
#include "base/tile-manager.h"
#include "core/gimpchannel.h"
#include "core/gimpimage.h"
#include "core/gimpimage-mask.h"
#include "core/gimplayer.h"
#include "widgets/gimpfontselection.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplay-foreach.h"
#include "display/gimpdisplayshell.h"
#include "gimpeditselectiontool.h"
#include "gimptexttool.h"
#include "gimptool.h"
#include "tool_manager.h"
#include "tool_options.h"
#include "libgimp_glue.h"
#include "floating_sel.h"
#include "undo_types.h"
#include "undo.h"
#include "libgimp/gimpintl.h"
#define DEFAULT_FONT "sans Normal"
#define DEFAULT_FONT_SIZE 50
/* the text tool structures */
typedef struct _TextOptions TextOptions;
struct _TextOptions
{
GimpToolOptions tool_options;
gchar *fontname_d;
GtkWidget *font_selection;
gdouble size;
gdouble size_d;
GtkObject *size_w;
gdouble border;
gdouble border_d;
GtkObject *border_w;
GimpUnit unit;
GimpUnit unit_d;
GtkWidget *unit_w;
};
static void gimp_text_tool_class_init (GimpTextToolClass *klass);
static void gimp_text_tool_init (GimpTextTool *tool);
static void gimp_text_tool_finalize (GObject *object);
static void text_tool_control (GimpTool *tool,
ToolAction tool_action,
GimpDisplay *gdisp);
static void text_tool_button_press (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void text_tool_button_release (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void text_tool_cursor_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
GimpDisplay *gdisp);
static void text_tool_render (GimpTextTool *text_tool);
static TextOptions * text_tool_options_new (GimpTextTool *text_tool);
static void text_tool_options_reset (GimpToolOptions *tool_options);
/* local variables */
static TextOptions *text_tool_options = NULL;
static GimpToolClass *parent_class = NULL;
/* functions */
void
gimp_text_tool_register (Gimp *gimp)
{
tool_manager_register_tool (gimp,
GIMP_TYPE_TEXT_TOOL,
FALSE,
"gimp:text_tool",
_("Text Tool"),
_("Add text to the image"),
N_("/Tools/Text"), "T",
NULL, "tools/text.html",
GIMP_STOCK_TOOL_TEXT);
}
GType
gimp_text_tool_get_type (void)
{
static GType tool_type = 0;
if (! tool_type)
{
static const GTypeInfo tool_info =
{
sizeof (GimpTextToolClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_text_tool_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpTextTool),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_text_tool_init,
};
tool_type = g_type_register_static (GIMP_TYPE_TOOL,
"GimpTextTool",
&tool_info, 0);
}
return tool_type;
}
static void
gimp_text_tool_class_init (GimpTextToolClass *klass)
{
GObjectClass *object_class;
GimpToolClass *tool_class;
object_class = G_OBJECT_CLASS (klass);
tool_class = GIMP_TOOL_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gimp_text_tool_finalize;
tool_class->control = text_tool_control;
tool_class->button_press = text_tool_button_press;
tool_class->button_release = text_tool_button_release;
tool_class->cursor_update = text_tool_cursor_update;
}
static void
gimp_text_tool_init (GimpTextTool *text_tool)
{
GimpTool *tool;
tool = GIMP_TOOL (text_tool);
text_tool->pango_context = pango_ft2_get_context ();
/* The tool options */
if (! text_tool_options)
{
text_tool_options = text_tool_options_new (text_tool);
tool_manager_register_tool_options (GIMP_TYPE_TEXT_TOOL,
(GimpToolOptions *) text_tool_options);
}
tool->tool_cursor = GIMP_TEXT_TOOL_CURSOR;
tool->scroll_lock = TRUE; /* Disallow scrolling */
}
static void
gimp_text_tool_finalize (GObject *object)
{
GimpTextTool *text_tool;
text_tool = GIMP_TEXT_TOOL (object);
if (text_tool->pango_context)
{
g_object_unref (text_tool->pango_context);
text_tool->pango_context = NULL;
}
if (G_OBJECT_CLASS (parent_class)->finalize)
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
text_tool_options_reset (GimpToolOptions *tool_options)
{
TextOptions *options;
GtkWidget *spinbutton;
options = (TextOptions *) tool_options;
gimp_font_selection_set_fontname
(GIMP_FONT_SELECTION (options->font_selection), options->fontname_d);
gtk_adjustment_set_value (GTK_ADJUSTMENT (options->size_w),
options->size_d);
gtk_adjustment_set_value (GTK_ADJUSTMENT (options->border_w),
options->border_d);
/* resetting the unit menu is a bit tricky ... */
options->unit = options->unit_d;
gimp_unit_menu_set_unit (GIMP_UNIT_MENU (options->unit_w),
options->unit_d);
spinbutton =
g_object_get_data (G_OBJECT (options->unit_w), "set_digits");
while (spinbutton)
{
gtk_spin_button_set_digits (GTK_SPIN_BUTTON (spinbutton), 0);
spinbutton =
g_object_get_data (G_OBJECT (spinbutton), "set_digits");
}
}
static TextOptions *
text_tool_options_new (GimpTextTool *text_tool)
{
TextOptions *options;
GtkWidget *vbox;
GtkWidget *table;
GtkWidget *size_spinbutton;
GtkWidget *border_spinbutton;
options = g_new0 (TextOptions, 1);
tool_options_init ((GimpToolOptions *) options, text_tool_options_reset);
options->fontname_d = DEFAULT_FONT;
options->border = options->border_d = 0;
options->size = options->size_d = DEFAULT_FONT_SIZE;
options->unit = options->unit_d = GIMP_UNIT_PIXEL;
/* the main vbox */
vbox = options->tool_options.main_vbox;
options->font_selection = gimp_font_selection_new (text_tool->pango_context);
gimp_font_selection_set_fontname
(GIMP_FONT_SELECTION (options->font_selection), DEFAULT_FONT);
gtk_box_pack_start (GTK_BOX (vbox), GTK_WIDGET (options->font_selection),
FALSE, FALSE, 0);
gtk_widget_show (options->font_selection);
/* the size entries */
table = gtk_table_new (3, 2, FALSE);
gtk_table_set_col_spacing (GTK_TABLE (table), 0, 4);
gtk_box_pack_start (GTK_BOX (vbox), GTK_WIDGET (table), FALSE, FALSE, 0);
options->size_w = gtk_adjustment_new (options->size_d, 1e-5, 32767.0,
1.0, 50.0, 0.0);
size_spinbutton =
gtk_spin_button_new (GTK_ADJUSTMENT (options->size_w), 1.0, 0.0);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (size_spinbutton), TRUE);
g_signal_connect (G_OBJECT (options->size_w), "value_changed",
G_CALLBACK (gimp_double_adjustment_update),
&options->size);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
_("Size:"), 1.0, 0.5,
size_spinbutton, 1, FALSE);
options->border_w = gtk_adjustment_new (options->border_d, 1e-5, 32767.0,
1.0, 50.0, 0.0);
border_spinbutton =
gtk_spin_button_new (GTK_ADJUSTMENT (options->border_w), 1.0, 0.0);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (border_spinbutton), TRUE);
g_signal_connect (G_OBJECT (options->border_w), "value_changed",
G_CALLBACK (gimp_double_adjustment_update),
&options->border);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 1,
_("Border:"), 1.0, 0.5,
border_spinbutton, 1, FALSE);
options->unit_w =
gimp_unit_menu_new ("%a", options->unit_d, TRUE, FALSE, TRUE);
g_signal_connect (G_OBJECT (options->unit_w), "unit_changed",
G_CALLBACK (gimp_unit_menu_update),
&options->unit);
g_object_set_data (G_OBJECT (options->unit_w), "set_digits",
size_spinbutton);
g_object_set_data (G_OBJECT (size_spinbutton), "set_digits",
border_spinbutton);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 2,
_("Unit:"), 1.0, 0.5,
options->unit_w, 1, FALSE);
gtk_widget_show (table);
return options;
}
static void
text_tool_control (GimpTool *tool,
ToolAction action,
GimpDisplay *gdisp)
{
switch (action)
{
case PAUSE:
break;
case RESUME:
break;
case HALT:
break;
default:
break;
}
}
static void
text_tool_button_press (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpTextTool *text_tool;
GimpLayer *layer;
text_tool = GIMP_TEXT_TOOL (tool);
text_tool->gdisp = gdisp;
tool->state = ACTIVE;
tool->gdisp = gdisp;
text_tool->click_x = coords->x;
text_tool->click_y = coords->y;
if ((layer = gimp_image_pick_correlate_layer (gdisp->gimage,
text_tool->click_x,
text_tool->click_y)))
/* if there is a floating selection, and this aint it, use the move tool */
if (gimp_layer_is_floating_sel (layer))
{
init_edit_selection (tool, gdisp, coords, EDIT_LAYER_TRANSLATE);
return;
}
text_tool_render (GIMP_TEXT_TOOL (tool));
}
static void
text_tool_button_release (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
tool->state = INACTIVE;
}
static void
text_tool_cursor_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpDisplayShell *shell;
GimpLayer *layer;
shell = GIMP_DISPLAY_SHELL (gdisp->shell);
layer = gimp_image_pick_correlate_layer (gdisp->gimage, coords->x, coords->y);
if (layer && gimp_layer_is_floating_sel (layer))
{
/* if there is a floating selection, and this aint it ... */
gimp_display_shell_install_tool_cursor (shell,
GDK_FLEUR,
GIMP_MOVE_TOOL_CURSOR,
GIMP_CURSOR_MODIFIER_NONE);
}
else
{
gimp_display_shell_install_tool_cursor (shell,
GDK_XTERM,
GIMP_TEXT_TOOL_CURSOR,
GIMP_CURSOR_MODIFIER_NONE);
}
}
static void
text_tool_render (GimpTextTool *text_tool)
{
GimpDisplay *gdisp;
PangoFontDescription *font_desc;
gchar *fontname;
gchar *text;
gdouble border;
gdouble size;
gdouble factor;
gdisp = text_tool->gdisp;
font_desc = gimp_font_selection_get_font_desc
(GIMP_FONT_SELECTION (text_tool_options->font_selection));
if (!font_desc)
{
g_message (_("No font choosen or font invalid."));
return;
}
size = text_tool_options->size;
border = text_tool_options->border;
switch (text_tool_options->unit)
{
case GIMP_UNIT_PIXEL:
break;
default:
factor = (gdisp->gimage->xresolution /
gimp_unit_get_factor (text_tool_options->unit));
size *= factor;
border *= factor;
break;
}
pango_font_description_set_size (font_desc, PANGO_SCALE * MAX (1, size));
fontname = pango_font_description_to_string (font_desc);
pango_font_description_free (font_desc);
text = "gimp"; /* FIXME */
text_render (gdisp->gimage, gimp_image_active_drawable (gdisp->gimage),
text_tool->click_x, text_tool->click_y,
fontname, text, border,
TRUE /* antialias */);
g_free (fontname);
gdisplays_flush ();
}
GimpLayer *
text_render (GimpImage *gimage,
GimpDrawable *drawable,
gint text_x,
gint text_y,
const gchar *fontname,
const gchar *text,
gint border,
gint antialias)
{
PangoFontDescription *font_desc;
PangoContext *context;
PangoLayout *layout;
PangoRectangle ink;
PangoRectangle logical;
GimpImageType layer_type;
GimpLayer *layer = NULL;
g_return_val_if_fail (fontname != NULL, FALSE);
g_return_val_if_fail (text != NULL, FALSE);
if (border < 0)
border = 0;
/* determine the layer type */
if (drawable)
layer_type = gimp_drawable_type_with_alpha (drawable);
else
layer_type = gimp_image_base_type_with_alpha (gimage);
font_desc = pango_font_description_from_string (fontname);
g_return_val_if_fail (font_desc != NULL, NULL);
if (!font_desc)
return NULL;
context = pango_ft2_get_context ();
layout = pango_layout_new (context);
pango_layout_set_font_description (layout, font_desc);
pango_font_description_free (font_desc);
pango_layout_set_text (layout, text, -1);
pango_layout_get_pixel_extents (layout, &ink, &logical);
g_print ("ink rect: %d x %d @ %d, %d\n",
ink.width, ink.height, ink.x, ink.y);
g_print ("logical rect: %d x %d @ %d, %d\n",
logical.width, logical.height, logical.x, logical.y);
if (ink.width > 0 && ink.height > 0)
{
TileManager *mask;
PixelRegion textPR;
PixelRegion maskPR;
FT_Bitmap bitmap;
guchar *black = NULL;
guchar color[MAX_CHANNELS];
gint width;
gint height;
gint y;
bitmap.width = ink.width;
bitmap.rows = ink.height;
bitmap.pitch = ink.width;
if (bitmap.pitch & 3)
bitmap.pitch += 4 - (bitmap.pitch & 3);
bitmap.buffer = g_malloc0 (bitmap.rows * bitmap.pitch);
pango_ft2_render_layout (&bitmap, layout,
- ink.x,
- ink.height - ink.y);
width = ink.width + 2 * border;
height = ink.height + 2 * border;
mask = tile_manager_new (width, height, 1);
pixel_region_init (&maskPR, mask, 0, 0, width, height, TRUE);
if (border)
black = g_malloc0 (width);
for (y = 0; y < border; y++)
pixel_region_set_row (&maskPR, 0, y, width, black);
for (; y < height - border; y++)
{
if (border)
{
pixel_region_set_row (&maskPR, 0, y, border, black);
pixel_region_set_row (&maskPR, width - border, y, border, black);
}
pixel_region_set_row (&maskPR, border, y, bitmap.width,
bitmap.buffer + (y - border) * bitmap.pitch);
}
for (; y < height; y++)
pixel_region_set_row (&maskPR, 0, y, width, black);
g_free (black);
g_free (bitmap.buffer);
layer = gimp_layer_new (gimage, width, height, layer_type,
_("Text Layer"), OPAQUE_OPACITY, NORMAL_MODE);
/* color the layer buffer */
gimp_image_get_foreground (gimage, drawable, color);
color[GIMP_DRAWABLE (layer)->bytes - 1] = OPAQUE_OPACITY;
pixel_region_init (&textPR, GIMP_DRAWABLE (layer)->tiles,
0, 0, width, height, TRUE);
color_region (&textPR, color);
/* apply the text mask */
pixel_region_init (&textPR, GIMP_DRAWABLE (layer)->tiles,
0, 0, width, height, TRUE);
pixel_region_init (&maskPR, mask,
0, 0, width, height, FALSE);
apply_mask_to_region (&textPR, &maskPR, OPAQUE_OPACITY);
/* Start a group undo */
undo_push_group_start (gimage, TEXT_UNDO);
/* Set the layer offsets */
GIMP_DRAWABLE (layer)->offset_x = text_x;
GIMP_DRAWABLE (layer)->offset_y = text_y;
/* If there is a selection mask clear it--
* this might not always be desired, but in general,
* it seems like the correct behavior.
*/
if (! gimage_mask_is_empty (gimage))
gimp_channel_clear (gimp_image_get_mask (gimage));
/* If the drawable is NULL, create a new layer */
if (drawable == NULL)
gimp_image_add_layer (gimage, layer, -1);
/* Otherwise, instantiate the text as the new floating selection */
else
floating_sel_attach (layer, drawable);
/* end the group undo */
undo_push_group_end (gimage);
tile_manager_destroy (mask);
}
g_object_unref (layout);
g_object_unref (context);
return layer;
}
gboolean
text_get_extents (const gchar *fontname,
const gchar *text,
gint *width,
gint *height,
gint *ascent,
gint *descent)
{
PangoFontDescription *font_desc;
PangoContext *context;
PangoLayout *layout;
PangoRectangle rect;
g_return_val_if_fail (fontname != NULL, FALSE);
g_return_val_if_fail (text != NULL, FALSE);
font_desc = pango_font_description_from_string (fontname);
if (!font_desc)
return FALSE;
context = pango_ft2_get_context ();
layout = pango_layout_new (context);
pango_layout_set_font_description (layout, font_desc);
pango_font_description_free (font_desc);
pango_layout_set_text (layout, text, -1);
pango_layout_get_pixel_extents (layout, &rect, NULL);
if (width)
*width = rect.width;
if (height)
*height = rect.height;
if (ascent)
*ascent = -rect.y;
if (descent)
*descent = rect.height + rect.y;
g_object_unref (layout);
g_object_unref (context);
return TRUE;
}
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