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gimp/plug-ins/common/lens-flare.c

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/*
* This is the FlareFX plug-in for GIMP 0.99
* Version 1.05
*
* Copyright (C) 1997-1998 Karl-Johan Andersson (t96kja@student.tdb.uu.se)
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
/*
* Please send any comments or suggestions to me,
* Karl-Johan Andersson (t96kja@student.tdb.uu.se)
*
* TODO:
* - add "streaks" from lightsource
* - improve the user interface
* - speed it up
* - more flare types, more control (color, size, intensity...)
*
* Missing something? - please contact me!
*
* May 2000 - tim copperfield [timecop@japan.co.jp]
* preview window now draws a "mini flarefx" to show approximate
* positioning after final render.
*
* Note, the algorithm does not render into an alpha channel.
* Therefore, changed RGB* to RGB in the capabilities.
* Someone who actually knows something about graphics should
* take a look to see why this doesnt render on alpha channel :)
*
*/
#include "config.h"
#include <string.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define PLUG_IN_PROC "plug-in-flarefx"
#define PLUG_IN_BINARY "flarefx"
/* --- Typedefs --- */
typedef struct
{
gint posx;
gint posy;
} FlareValues;
typedef struct REFLECT
{
GimpRGB ccol;
gfloat size;
gint xp;
gint yp;
gint type;
} Reflect;
typedef struct
{
GimpDrawable *drawable;
GimpPreview *preview;
GtkWidget *coords;
gboolean cursor_drawn;
gint curx, cury; /* x,y of cursor in preview */
gint oldx, oldy;
} FlareCenter;
/* --- Declare local functions --- */
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static void FlareFX (GimpDrawable *drawable,
GimpPreview *preview);
static gboolean flare_dialog (GimpDrawable *drawable);
static GtkWidget * flare_center_create (GimpDrawable *drawable,
GimpPreview *preview);
static void flare_center_cursor_draw (FlareCenter *center);
static void flare_center_coords_update (GimpSizeEntry *coords,
FlareCenter *center);
static void flare_center_cursor_update (FlareCenter *center);
static void flare_center_preview_realize (GtkWidget *widget,
FlareCenter *center);
static gboolean flare_center_preview_expose (GtkWidget *widget,
GdkEvent *event,
FlareCenter *center);
static gboolean flare_center_preview_events (GtkWidget *widget,
GdkEvent *event,
FlareCenter *center);
static void mcolor (guchar *s,
gfloat h);
static void mglow (guchar *s,
gfloat h);
static void minner (guchar *s,
gfloat h);
static void mouter (guchar *s,
gfloat h);
static void mhalo (guchar *s,
gfloat h);
static void initref (gint sx,
gint sy,
gint width,
gint height,
gint matt);
static void fixpix (guchar *data,
float procent,
GimpRGB *colpro);
static void mrt1 (guchar *s,
Reflect *ref,
gint col,
gint row);
static void mrt2 (guchar *s,
Reflect *ref,
gint col,
gint row);
static void mrt3 (guchar *s,
Reflect *ref,
gint col,
gint row);
static void mrt4 (guchar *s,
Reflect *ref,
gint col,
gint row);
/* --- Variables --- */
const GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static FlareValues fvals =
{
128, 128 /* posx, posy */
};
static gfloat scolor, sglow, sinner, souter; /* size */
static gfloat shalo;
static gint xs, ys;
static gint numref;
static GimpRGB color, glow, inner, outer, halo;
static Reflect ref1[19];
static gboolean show_cursor = TRUE;
/* --- Functions --- */
MAIN ()
static void
query (void)
{
static const GimpParamDef args[] =
{
{ GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
{ GIMP_PDB_IMAGE, "image", "Input image (unused)" },
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
{ GIMP_PDB_INT32, "pos-x", "X-position" },
{ GIMP_PDB_INT32, "pos-y", "Y-position" }
};
gimp_install_procedure (PLUG_IN_PROC,
N_("Add a lens flare effect"),
"Adds a lens flare effects. Makes your image look "
"like it was snapped with a cheap camera with a lot "
"of lens :)",
"Karl-Johan Andersson", /* Author */
"Karl-Johan Andersson", /* Copyright */
"May 2000",
N_("Lens _Flare..."),
"RGB*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
gimp_plugin_menu_register (PLUG_IN_PROC,
"<Image>/Filters/Light and Shadow/Light");
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1];
GimpDrawable *drawable;
GimpRunMode run_mode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
run_mode = param[0].data.d_int32;
INIT_I18N ();
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
/* Get the specified drawable */
drawable = gimp_drawable_get (param[2].data.d_drawable);
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
/* Possibly retrieve data */
gimp_get_data (PLUG_IN_PROC, &fvals);
/* First acquire information with a dialog */
if (! flare_dialog (drawable))
{
gimp_drawable_detach (drawable);
return;
}
break;
case GIMP_RUN_NONINTERACTIVE:
/* Make sure all the arguments are there! */
if (nparams != 5)
status = GIMP_PDB_CALLING_ERROR;
if (status == GIMP_PDB_SUCCESS)
{
fvals.posx = (gint) param[3].data.d_int32;
fvals.posy = (gint) param[4].data.d_int32;
}
break;
case GIMP_RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
gimp_get_data (PLUG_IN_PROC, &fvals);
break;
default:
break;
}
if (status == GIMP_PDB_SUCCESS)
{
/* Make sure that the drawable is gray or RGB color */
if (gimp_drawable_is_rgb (drawable->drawable_id) ||
gimp_drawable_is_gray (drawable->drawable_id))
{
gimp_progress_init (_("Render lens flare"));
gimp_tile_cache_ntiles (2 *
(drawable->width / gimp_tile_width () + 1));
FlareFX (drawable, NULL);
if (run_mode != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush ();
/* Store data */
if (run_mode == GIMP_RUN_INTERACTIVE)
gimp_set_data (PLUG_IN_PROC, &fvals, sizeof (FlareValues));
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
values[0].data.d_status = status;
gimp_drawable_detach (drawable);
}
static gboolean
flare_dialog (GimpDrawable *drawable)
{
GtkWidget *dialog;
GtkWidget *main_vbox;
GtkWidget *preview;
GtkWidget *frame;
gboolean run;
gimp_ui_init (PLUG_IN_BINARY, TRUE);
dialog = gimp_dialog_new (_("Lens Flare"), PLUG_IN_BINARY,
NULL, 0,
gimp_standard_help_func, PLUG_IN_PROC,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
gimp_window_set_transient (GTK_WINDOW (dialog));
main_vbox = gtk_vbox_new (FALSE, 12);
gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
gtk_container_add (GTK_CONTAINER (gtk_dialog_get_content_area (GTK_DIALOG (dialog))),
main_vbox);
gtk_widget_show (main_vbox);
preview = gimp_zoom_preview_new (drawable);
gtk_widget_add_events (GIMP_PREVIEW (preview)->area,
GDK_POINTER_MOTION_MASK);
gtk_box_pack_start (GTK_BOX (main_vbox), preview, TRUE, TRUE, 0);
gtk_widget_show (preview);
g_signal_connect_swapped (preview, "invalidated",
G_CALLBACK (FlareFX),
drawable);
frame = flare_center_create (drawable, GIMP_PREVIEW (preview));
gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
gtk_widget_show (dialog);
run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dialog);
return run;
}
/* --- Filter functions --- */
static void
FlareFX (GimpDrawable *drawable,
GimpPreview *preview)
{
GimpPixelRgn srcPR, destPR;
gint width, height;
gint bytes;
guchar *cur_row, *s;
guchar *src = NULL;
guchar *dest = NULL;
gint row, col, i;
gint x1, y1, x2, y2;
gint matt;
gfloat hyp;
gdouble zoom = 0.0;
bytes = drawable->bpp;
if (preview)
{
src = gimp_zoom_preview_get_source (GIMP_ZOOM_PREVIEW (preview),
&width, &height, &bytes);
zoom = gimp_zoom_preview_get_factor (GIMP_ZOOM_PREVIEW (preview));
gimp_preview_transform (preview,
fvals.posx, fvals.posy, &xs, &ys);
x1 = 0;
y1 = 0;
x2 = width;
y2 = height;
dest = g_new (guchar, bytes * width * height);
}
else
{
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
width = drawable->width;
height = drawable->height;
xs = fvals.posx; /* set x,y of flare center */
ys = fvals.posy;
/* initialize the pixel regions */
gimp_pixel_rgn_init (&srcPR, drawable, 0, 0, width, height, FALSE, FALSE);
gimp_pixel_rgn_init (&destPR, drawable, 0, 0, width, height, TRUE, TRUE);
}
if (preview)
matt = width * zoom;
else
matt = width;
cur_row = g_new (guchar, (x2 - x1) * bytes);
scolor = (gfloat) matt * 0.0375;
sglow = (gfloat) matt * 0.078125;
sinner = (gfloat) matt * 0.1796875;
souter = (gfloat) matt * 0.3359375;
shalo = (gfloat) matt * 0.084375;
color.r = 239.0/255.0; color.g = 239.0/255.0; color.b = 239.0/255.0;
glow.r = 245.0/255.0; glow.g = 245.0/255.0; glow.b = 245.0/255.0;
inner.r = 255.0/255.0; inner.g = 38.0/255.0; inner.b = 43.0/255.0;
outer.r = 69.0/255.0; outer.g = 59.0/255.0; outer.b = 64.0/255.0;
halo.r = 80.0/255.0; halo.g = 15.0/255.0; halo.b = 4.0/255.0;
initref (xs, ys, width, height, matt);
/* Loop through the rows */
for (row = y1; row < y2; row++) /* y-coord */
{
if (preview)
memcpy (cur_row, src + row * width * bytes, width * bytes);
else
gimp_pixel_rgn_get_row (&srcPR, cur_row, x1, row, x2-x1);
s = cur_row;
for (col = x1; col < x2; col++) /* x-coord */
{
hyp = hypot (col-xs, row-ys);
mcolor (s, hyp); /* make color */
mglow (s, hyp); /* make glow */
minner (s, hyp); /* make inner */
mouter (s, hyp); /* make outer */
mhalo (s, hyp); /* make halo */
for (i = 0; i < numref; i++)
{
switch (ref1[i].type)
{
case 1:
mrt1 (s, ref1 + i, col, row);
break;
case 2:
mrt2 (s, ref1 + i, col, row);
break;
case 3:
mrt3 (s, ref1 + i, col, row);
break;
case 4:
mrt4 (s, ref1 + i, col, row);
break;
}
}
s += bytes;
}
if (preview)
{
memcpy (dest + row * width * bytes, cur_row, width * bytes);
}
else
{
/* store the dest */
gimp_pixel_rgn_set_row (&destPR, cur_row, x1, row, (x2 - x1));
}
if ((row % 5) == 0 && !preview)
gimp_progress_update ((double) row / (double) (y2 - y1));
}
if (preview)
{
gimp_preview_draw_buffer (preview, dest, width * bytes);
g_free (src);
g_free (dest);
}
else
{
/* update the textured region */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x1, y1, (x2 - x1), (y2 - y1));
}
g_free (cur_row);
}
static void
mcolor (guchar *s,
gfloat h)
{
gfloat procent;
procent = scolor - h;
procent /= scolor;
if (procent > 0.0)
{
procent *= procent;
fixpix (s, procent, &color);
}
}
static void
mglow (guchar *s,
gfloat h)
{
gfloat procent;
procent = sglow - h;
procent /= sglow;
if (procent > 0.0)
{
procent *= procent;
fixpix (s, procent, &glow);
}
}
static void
minner (guchar *s,
gfloat h)
{
gfloat procent;
procent = sinner - h;
procent /= sinner;
if (procent > 0.0)
{
procent *= procent;
fixpix (s, procent, &inner);
}
}
static void
mouter (guchar *s,
gfloat h)
{
gfloat procent;
procent = souter - h;
procent /= souter;
if (procent > 0.0)
fixpix (s, procent, &outer);
}
static void
mhalo (guchar *s,
gfloat h)
{
gfloat procent;
procent = h - shalo;
procent /= (shalo * 0.07);
procent = fabs (procent);
if (procent < 1.0)
fixpix (s, 1.0 - procent, &halo);
}
static void
fixpix (guchar *data,
float procent,
GimpRGB *colpro)
{
data[0] += (255 - data[0]) * procent * colpro->r;
data[1] += (255 - data[1]) * procent * colpro->g;
data[2] += (255 - data[2]) * procent * colpro->b;
}
static void
initref (gint sx,
gint sy,
gint width,
gint height,
gint matt)
{
gint xh, yh, dx, dy;
xh = width / 2; yh = height / 2;
dx = xh - sx; dy = yh - sy;
numref = 19;
ref1[0].type=1; ref1[0].size=(gfloat)matt*0.027;
ref1[0].xp=0.6699*dx+xh; ref1[0].yp=0.6699*dy+yh;
ref1[0].ccol.r=0.0; ref1[0].ccol.g=14.0/255.0; ref1[0].ccol.b=113.0/255.0;
ref1[1].type=1; ref1[1].size=(gfloat)matt*0.01;
ref1[1].xp=0.2692*dx+xh; ref1[1].yp=0.2692*dy+yh;
ref1[1].ccol.r=90.0/255.0; ref1[1].ccol.g=181.0/255.0; ref1[1].ccol.b=142.0/255.0;
ref1[2].type=1; ref1[2].size=(gfloat)matt*0.005;
ref1[2].xp=-0.0112*dx+xh; ref1[2].yp=-0.0112*dy+yh;
ref1[2].ccol.r=56.0/255.0; ref1[2].ccol.g=140.0/255.0; ref1[2].ccol.b=106.0/255.0;
ref1[3].type=2; ref1[3].size=(gfloat)matt*0.031;
ref1[3].xp=0.6490*dx+xh; ref1[3].yp=0.6490*dy+yh;
ref1[3].ccol.r=9.0/255.0; ref1[3].ccol.g=29.0/255.0; ref1[3].ccol.b=19.0/255.0;
ref1[4].type=2; ref1[4].size=(gfloat)matt*0.015;
ref1[4].xp=0.4696*dx+xh; ref1[4].yp=0.4696*dy+yh;
ref1[4].ccol.r=24.0/255.0; ref1[4].ccol.g=14.0/255.0; ref1[4].ccol.b=0.0;
ref1[5].type=2; ref1[5].size=(gfloat)matt*0.037;
ref1[5].xp=0.4087*dx+xh; ref1[5].yp=0.4087*dy+yh;
ref1[5].ccol.r=24.0/255.0; ref1[5].ccol.g=14.0/255.0; ref1[5].ccol.b=0.0;
ref1[6].type=2; ref1[6].size=(gfloat)matt*0.022;
ref1[6].xp=-0.2003*dx+xh; ref1[6].yp=-0.2003*dy+yh;
ref1[6].ccol.r=42.0/255.0; ref1[6].ccol.g=19.0/255.0; ref1[6].ccol.b=0.0;
ref1[7].type=2; ref1[7].size=(gfloat)matt*0.025;
ref1[7].xp=-0.4103*dx+xh; ref1[7].yp=-0.4103*dy+yh;
ref1[7].ccol.b=17.0/255.0; ref1[7].ccol.g=9.0/255.0; ref1[7].ccol.r=0.0;
ref1[8].type=2; ref1[8].size=(gfloat)matt*0.058;
ref1[8].xp=-0.4503*dx+xh; ref1[8].yp=-0.4503*dy+yh;
ref1[8].ccol.b=10.0/255.0; ref1[8].ccol.g=4.0/255.0; ref1[8].ccol.r=0.0;
ref1[9].type=2; ref1[9].size=(gfloat)matt*0.017;
ref1[9].xp=-0.5112*dx+xh; ref1[9].yp=-0.5112*dy+yh;
ref1[9].ccol.r=5.0/255.0; ref1[9].ccol.g=5.0/255.0; ref1[9].ccol.b=14.0/255.0;
ref1[10].type=2; ref1[10].size=(gfloat)matt*0.2;
ref1[10].xp=-1.496*dx+xh; ref1[10].yp=-1.496*dy+yh;
ref1[10].ccol.r=9.0/255.0; ref1[10].ccol.g=4.0/255.0; ref1[10].ccol.b=0.0;
ref1[11].type=2; ref1[11].size=(gfloat)matt*0.5;
ref1[11].xp=-1.496*dx+xh; ref1[11].yp=-1.496*dy+yh;
ref1[11].ccol.r=9.0/255.0; ref1[11].ccol.g=4.0/255.0; ref1[11].ccol.b=0.0;
ref1[12].type=3; ref1[12].size=(gfloat)matt*0.075;
ref1[12].xp=0.4487*dx+xh; ref1[12].yp=0.4487*dy+yh;
ref1[12].ccol.r=34.0/255.0; ref1[12].ccol.g=19.0/255.0; ref1[12].ccol.b=0.0;
ref1[13].type=3; ref1[13].size=(gfloat)matt*0.1;
ref1[13].xp=dx+xh; ref1[13].yp=dy+yh;
ref1[13].ccol.r=14.0/255.0; ref1[13].ccol.g=26.0/255.0; ref1[13].ccol.b=0.0;
ref1[14].type=3; ref1[14].size=(gfloat)matt*0.039;
ref1[14].xp=-1.301*dx+xh; ref1[14].yp=-1.301*dy+yh;
ref1[14].ccol.r=10.0/255.0; ref1[14].ccol.g=25.0/255.0; ref1[14].ccol.b=13.0/255.0;
ref1[15].type=4; ref1[15].size=(gfloat)matt*0.19;
ref1[15].xp=1.309*dx+xh; ref1[15].yp=1.309*dy+yh;
ref1[15].ccol.r=9.0/255.0; ref1[15].ccol.g=0.0; ref1[15].ccol.b=17.0/255.0;
ref1[16].type=4; ref1[16].size=(gfloat)matt*0.195;
ref1[16].xp=1.309*dx+xh; ref1[16].yp=1.309*dy+yh;
ref1[16].ccol.r=9.0/255.0; ref1[16].ccol.g=16.0/255.0; ref1[16].ccol.b=5.0/255.0;
ref1[17].type=4; ref1[17].size=(gfloat)matt*0.20;
ref1[17].xp=1.309*dx+xh; ref1[17].yp=1.309*dy+yh;
ref1[17].ccol.r=17.0/255.0; ref1[17].ccol.g=4.0/255.0; ref1[17].ccol.b=0.0;
ref1[18].type=4; ref1[18].size=(gfloat)matt*0.038;
ref1[18].xp=-1.301*dx+xh; ref1[18].yp=-1.301*dy+yh;
ref1[18].ccol.r=17.0/255.0; ref1[18].ccol.g=4.0/255.0; ref1[18].ccol.b=0.0;
}
static void
mrt1 (guchar *s,
Reflect *ref,
gint col,
gint row)
{
gfloat procent;
procent = ref->size - hypot (ref->xp - col, ref->yp - row);
procent /= ref->size;
if (procent > 0.0)
{
procent *= procent;
fixpix (s, procent, &ref->ccol);
}
}
static void
mrt2 (guchar *s,
Reflect *ref,
gint col,
gint row)
{
gfloat procent;
procent = ref->size - hypot (ref->xp - col, ref->yp - row);
procent /= (ref->size * 0.15);
if (procent > 0.0)
{
if (procent > 1.0)
procent = 1.0;
fixpix (s, procent, &ref->ccol);
}
}
static void
mrt3 (guchar *s,
Reflect *ref,
gint col,
gint row)
{
gfloat procent;
procent = ref->size - hypot (ref->xp - col, ref->yp - row);
procent /= (ref->size * 0.12);
if (procent > 0.0)
{
if (procent > 1.0)
procent = 1.0 - (procent * 0.12);
fixpix (s, procent, &ref->ccol);
}
}
static void
mrt4 (guchar *s,
Reflect *ref,
gint col,
gint row)
{
gfloat procent;
procent = hypot (ref->xp - col, ref->yp - row) - ref->size;
procent /= (ref->size*0.04);
procent = fabs (procent);
if (procent < 1.0)
fixpix (s, 1.0 - procent, &ref->ccol);
}
/*=================================================================
CenterFrame
A frame that contains one preview and 2 entrys, used for positioning
of the center of Flare.
This whole thing is just too ugly, but I don't want to dig into it
- tim
==================================================================*/
/*
* Create new CenterFrame, and return it (GtkFrame).
*/
static GtkWidget *
flare_center_create (GimpDrawable *drawable,
GimpPreview *preview)
{
FlareCenter *center;
GtkWidget *frame;
GtkWidget *hbox;
GtkWidget *check;
gint32 image_ID;
gdouble res_x;
gdouble res_y;
center = g_new0 (FlareCenter, 1);
center->drawable = drawable;
center->preview = preview;
center->cursor_drawn = FALSE;
center->curx = 0;
center->cury = 0;
center->oldx = 0;
center->oldy = 0;
frame = gimp_frame_new (_("Center of Flare Effect"));
g_object_set_data (G_OBJECT (frame), "center", center);
g_signal_connect_swapped (frame, "destroy",
G_CALLBACK (g_free),
center);
hbox = gtk_hbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (frame), hbox);
gtk_widget_show (hbox);
image_ID = gimp_drawable_get_image (drawable->drawable_id);
gimp_image_get_resolution (image_ID, &res_x, &res_y);
center->coords = gimp_coordinates_new (GIMP_UNIT_PIXEL, "%p", TRUE, TRUE, -1,
GIMP_SIZE_ENTRY_UPDATE_SIZE,
FALSE, FALSE,
_("_X:"), fvals.posx, res_x,
- (gdouble) drawable->width,
2 * drawable->width,
0, drawable->width,
_("_Y:"), fvals.posy, res_y,
- (gdouble) drawable->height,
2 * drawable->height,
0, drawable->height);
gtk_table_set_row_spacing (GTK_TABLE (center->coords), 1, 12);
gtk_box_pack_start (GTK_BOX (hbox), center->coords, FALSE, FALSE, 0);
gtk_widget_show (center->coords);
g_signal_connect (center->coords, "value-changed",
G_CALLBACK (flare_center_coords_update),
center);
g_signal_connect (center->coords, "refval-changed",
G_CALLBACK (flare_center_coords_update),
center);
check = gtk_check_button_new_with_mnemonic (_("Show _position"));
gtk_table_attach (GTK_TABLE (center->coords), check, 0, 5, 2, 3,
GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (check), show_cursor);
gtk_widget_show (check);
g_signal_connect (check, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&show_cursor);
g_signal_connect_swapped (check, "toggled",
G_CALLBACK (gimp_preview_invalidate),
preview);
g_signal_connect (preview->area, "realize",
G_CALLBACK (flare_center_preview_realize),
center);
g_signal_connect_after (preview->area, "expose-event",
G_CALLBACK (flare_center_preview_expose),
center);
g_signal_connect (preview->area, "event",
G_CALLBACK (flare_center_preview_events),
center);
flare_center_cursor_update (center);
return frame;
}
/*
* Drawing CenterFrame
* if update & PREVIEW, draw preview
* if update & CURSOR, draw cross cursor
*/
static void
flare_center_cursor_draw (FlareCenter *center)
{
GtkWidget *prvw = center->preview->area;
GtkStyle *style = gtk_widget_get_style (prvw);
gint width, height;
gimp_preview_get_size (center->preview, &width, &height);
gdk_gc_set_function (style->black_gc, GDK_INVERT);
if (show_cursor)
{
if (center->cursor_drawn)
{
gdk_draw_line (gtk_widget_get_window (prvw),
style->black_gc,
center->oldx, 1,
center->oldx,
height - 1);
gdk_draw_line (gtk_widget_get_window (prvw),
style->black_gc,
1, center->oldy,
width - 1,
center->oldy);
}
gdk_draw_line (gtk_widget_get_window (prvw),
style->black_gc,
center->curx, 1,
center->curx,
height - 1);
gdk_draw_line (gtk_widget_get_window (prvw),
style->black_gc,
1, center->cury,
width - 1,
center->cury);
}
/* current position of cursor is updated */
center->oldx = center->curx;
center->oldy = center->cury;
center->cursor_drawn = TRUE;
gdk_gc_set_function (style->black_gc, GDK_COPY);
}
/*
* CenterFrame entry callback
*/
static void
flare_center_coords_update (GimpSizeEntry *coords,
FlareCenter *center)
{
fvals.posx = gimp_size_entry_get_refval (coords, 0);
fvals.posy = gimp_size_entry_get_refval (coords, 1);
flare_center_cursor_update (center);
flare_center_cursor_draw (center);
gimp_preview_invalidate (center->preview);
}
/*
* Update the cross cursor's coordinates accoding to pvals.[xy]center
* but not redraw it
*/
static void
flare_center_cursor_update (FlareCenter *center)
{
gimp_preview_transform (center->preview,
fvals.posx, fvals.posy,
&center->curx, &center->cury);
}
/*
* Set the preview area's cursor on realize
*/
static void
flare_center_preview_realize (GtkWidget *widget,
FlareCenter *center)
{
GdkDisplay *display = gtk_widget_get_display (widget);
GdkCursor *cursor = gdk_cursor_new_for_display (display, GDK_CROSSHAIR);
gimp_preview_set_default_cursor (center->preview, cursor);
gdk_cursor_unref (cursor);
}
/*
* Handle the expose event on the preview
*/
static gboolean
flare_center_preview_expose (GtkWidget *widget,
GdkEvent *event,
FlareCenter *center)
{
center->cursor_drawn = FALSE;
flare_center_cursor_update (center);
flare_center_cursor_draw (center);
return FALSE;
}
/*
* Handle other events on the preview
*/
static gboolean
flare_center_preview_events (GtkWidget *widget,
GdkEvent *event,
FlareCenter *center)
{
gint tx, ty;
switch (event->type)
{
case GDK_MOTION_NOTIFY:
if (! (((GdkEventMotion *) event)->state & GDK_BUTTON1_MASK))
break;
case GDK_BUTTON_PRESS:
{
GdkEventButton *bevent = (GdkEventButton *) event;
if (bevent->button == 1)
{
gimp_preview_untransform (center->preview,
bevent->x, bevent->y,
&tx, &ty);
flare_center_cursor_draw (center);
g_signal_handlers_block_by_func (center->coords,
flare_center_coords_update,
center);
gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (center->coords),
0, tx);
gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (center->coords),
1, ty);
g_signal_handlers_unblock_by_func (center->coords,
flare_center_coords_update,
center);
flare_center_coords_update (GIMP_SIZE_ENTRY (center->coords), center);
}
}
break;
default:
break;
}
return FALSE;
}
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