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gimp/plug-ins/common/gee_zoom.c

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/*
* (c) Adam D. Moss : 1998-2000 : adam@gimp.org : adam@foxbox.org
*
* This is part of the GIMP package and is released under the GNU
* Public License.
*/
/*
* Version 1.06 : 2000-12-12
*
* 1.06:
* "Out of hyding" remix. Dr Jekyll is still suspiciously
* absent from the fine bogey tale until Chapter Three.
*
* 1.05:
* Sub-pixel jitter is now less severe and less coarse.
*
* 1.04:
* Wigglyness and button-click fun.
*
* 1.03:
* Fix for pseudocolor displays w/gdkrgb.
*
* 1.02:
* Massive speedup if you have a very recent version of GTK 1.1.
* Removed possible div-by-0 errors, took the plugin out
* of hiding (guess we need a new easter-egg for GIMP 1.2!)
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <gtk/gtk.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
/* 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 do_fun (void);
static void window_response_callback (GtkWidget *widget,
gint response_id,
gpointer data);
static gboolean do_iteration (void);
static gboolean toggle_feedbacktype (GtkWidget *widget,
GdkEventButton *bevent);
static void render_frame (void);
static void init_preview_misc (void);
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static const guint width = 256;
static const guint height = 256;
static GRand *gr;
#define LUTSIZE 512
#define LUTSIZEMASK ((LUTSIZE)-1)
static gint wigglelut[LUTSIZE];
#define LOWAMP 2
#define HIGHAMP 11
static gint wiggleamp = LOWAMP;
/* Global widgets'n'stuff */
static guchar *seed_data;
static guchar *preview_data1;
static guchar *preview_data2;
static GtkWidget *drawing_area;
static gint32 image_id;
static GimpDrawable *drawable;
static GimpImageBaseType imagetype;
static guchar *palette;
static gint ncolours;
static guint idle_tag;
static gboolean feedbacktype = FALSE;
static gboolean wiggly = TRUE;
static gboolean rgb_mode;
MAIN ()
static void
query (void)
{
static GimpParamDef args[] =
{
{ GIMP_PDB_INT32, "run_mode", "Must be interactive (1)" },
{ GIMP_PDB_IMAGE, "image", "Input Image" },
{ GIMP_PDB_DRAWABLE, "drawable", "Input Drawable" }
};
gimp_install_procedure ("plug_in_the_old_egg",
"A big hello from the GIMP team!",
"Hay-ulp",
"Adam D. Moss <adam@gimp.org>",
"Adam D. Moss <adam@gimp.org>",
"1998",
N_("Gee-_Zoom"),
"RGB*, INDEXED*, GRAY*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
gimp_plugin_menu_register ("plug_in_the_old_egg", "<Image>/Filters/Toys");
}
static void
run (const gchar *name,
gint n_params,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1];
GimpRunMode run_mode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
gr = g_rand_new ();
*nreturn_vals = 1;
*return_vals = values;
run_mode = param[0].data.d_int32;
INIT_I18N ();
if (run_mode == GIMP_RUN_NONINTERACTIVE ||
n_params != 3)
{
status = GIMP_PDB_CALLING_ERROR;
}
if (status == GIMP_PDB_SUCCESS)
{
image_id = param[1].data.d_image;
drawable = gimp_drawable_get (param[2].data.d_drawable);
if (drawable)
do_fun();
else
status = GIMP_PDB_CALLING_ERROR;
}
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
g_rand_free (gr);
}
static void
build_dialog (void)
{
GtkWidget *dlg;
GtkWidget *button;
GtkWidget *frame;
gimp_ui_init ("gee_zoom", TRUE);
dlg = gimp_dialog_new (_("GEE-ZOOM"), "gee_zoom",
NULL, 0,
gimp_standard_help_func, "plug-in-the-old-egg",
NULL);
button = gtk_dialog_add_button (GTK_DIALOG (dlg),
_("Thank you for choosing GIMP"),
GTK_RESPONSE_OK);
g_signal_connect (dlg, "response",
G_CALLBACK (window_response_callback),
NULL);
gimp_help_set_help_data (button,
_("An obsolete creation of Adam D. Moss / "
"adam@gimp.org / adam@foxbox.org / 1998-2000"),
NULL);
/* The 'fun' half of the dialog */
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_container_set_border_width (GTK_CONTAINER (frame), 12);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox),
frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
drawing_area = gtk_drawing_area_new ();
gtk_widget_set_size_request (drawing_area, width, height);
gtk_container_add (GTK_CONTAINER (frame), drawing_area);
gtk_widget_show (drawing_area);
gtk_widget_add_events (drawing_area,
GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK);
g_signal_connect (drawing_area, "button_release_event",
G_CALLBACK (toggle_feedbacktype),
NULL);
gtk_widget_show (dlg);
idle_tag = g_idle_add_full (G_PRIORITY_LOW,
(GSourceFunc) do_iteration,
NULL,
NULL);
}
static void
init_lut (void)
{
gint i;
for (i=0; i<LUTSIZE; i++)
{
wigglelut[i] = RINT((double)(wiggleamp<<11))*(sin((double)(i) /
((double)LUTSIZEMASK /
10 * G_PI)));
}
}
static void
do_fun (void)
{
imagetype = gimp_image_base_type(image_id);
if (imagetype == GIMP_INDEXED)
palette = gimp_image_get_cmap (image_id, &ncolours);
/* cache hint */
gimp_tile_cache_ntiles (1);
init_preview_misc ();
build_dialog ();
init_lut();
render_frame();
gtk_main ();
}
/* Rendering Functions */
/* Adam's silly algorithm. */
static void
domap1 (unsigned char *src, unsigned char *dest,
int bx, int by, int cx, int cy)
{
unsigned int dy;
signed int bycxmcybx;
signed int bx2,by2;
signed int cx2,cy2;
unsigned int basesx;
unsigned int basesy;
static unsigned int grrr=0;
grrr++;
if ((cx+bx) == 0)
cx++;
if ((cy+by) == 0)
by++;
bycxmcybx = (by*cx-cy*bx);
if (bycxmcybx == 0)
bycxmcybx = 1;
/* A little sub-pixel jitter to liven things up. */
basesx = ((g_rand_int_range (gr, 0, 29<<19)/bycxmcybx)) +
((-128-((128*256)/(cx+bx)))<<11);
basesy = ((g_rand_int_range (gr, 0, 29<<19)/bycxmcybx)) +
((-128-((128*256)/(cy+by)))<<11);
bx2 = ((bx)<<19)/bycxmcybx;
cx2 = ((cx)<<19)/bycxmcybx;
by2 = ((by)<<19)/bycxmcybx;
cy2 = ((cy)<<19)/bycxmcybx;
for (dy=0;dy<256;dy++)
{
unsigned int sx;
unsigned int sy;
unsigned int dx;
sy = (basesy+=cx2);
sx = (basesx-=bx2);
if (wiggly)
{
sx += wigglelut[(((basesy)>>11)+grrr) & LUTSIZEMASK];
sy += wigglelut[(((basesx)>>11)+(grrr/3)) & LUTSIZEMASK];
}
dx = 256;
do
{
*dest++ = (*(src +
(
(
((255&(
(sx>>11)
)))
|
((((255&(
(sy>>11)
))<<8)))
)
)));
;
sx += by2;
sy -= cy2;
}
while (--dx);
}
}
/* 3bypp variant */
static void
domap3(unsigned char *src, unsigned char *dest,
int bx, int by, int cx, int cy)
{
unsigned int dy;
signed int bycxmcybx;
signed int bx2,by2;
signed int cx2,cy2;
unsigned int basesx;
unsigned int basesy;
static unsigned int grrr=0;
grrr++;
if ((cx+bx) == 0)
cx++;
if ((cy+by) == 0)
by++;
bycxmcybx = (by*cx-cy*bx);
if (bycxmcybx == 0)
bycxmcybx = 1;
/* A little sub-pixel jitter to liven things up. */
basesx = ((g_rand_int_range (gr, 0, 29<<19)/bycxmcybx)) +
((-128-((128*256)/(cx+bx)))<<11);
basesy = ((g_rand_int_range (gr, 0, 29<<19)/bycxmcybx)) +
((-128-((128*256)/(cy+by)))<<11);
bx2 = ((bx)<<19)/bycxmcybx;
cx2 = ((cx)<<19)/bycxmcybx;
by2 = ((by)<<19)/bycxmcybx;
cy2 = ((cy)<<19)/bycxmcybx;
for (dy=0;dy<256;dy++)
{
unsigned int sx;
unsigned int sy;
unsigned int dx;
sy = (basesy+=cx2);
sx = (basesx-=bx2);
if (wiggly)
{
sx += wigglelut[(((basesy)>>11)+grrr) & LUTSIZEMASK];
sy += wigglelut[(((basesx)>>11)+(grrr/3)) & LUTSIZEMASK];
}
dx = 256;
do
{
unsigned char* addr;
addr = src + 3*
(
(
((255&(
(sx>>11)
)))
|
((((255&(
(sy>>11)
))<<8)))
)
);
*dest++ = *(addr);
*dest++ = *(addr+1);
*dest++ = *(addr+2);
sx += by2;
sy -= cy2;
}
while (--dx);
}
}
static void
render_frame (void)
{
int i;
static int frame = 0;
unsigned char* tmp;
static gint xp=128, yp=128;
gint rxp, ryp;
GdkModifierType mask;
gint pixels;
if (! GTK_WIDGET_DRAWABLE (drawing_area))
return;
pixels = width*height*(rgb_mode?3:1);
tmp = preview_data2;
preview_data2 = preview_data1;
preview_data1 = tmp;
if (frame==0)
{
for (i=0;i<pixels;i++)
{
preview_data2[i] =
preview_data1[i] =
seed_data[i];
}
}
gdk_window_get_pointer (drawing_area->window, &rxp, &ryp, &mask);
if ((abs(rxp)>60)||(abs(ryp)>60))
{
xp = rxp;
yp = ryp;
}
if (rgb_mode)
{
domap3(preview_data2, preview_data1,
-(yp-xp)/2, xp+yp
,
xp+yp, (yp-xp)/2
);
gdk_draw_rgb_image (drawing_area->window,
drawing_area->style->white_gc,
0, 0, width, height,
GDK_RGB_DITHER_NORMAL,
preview_data1, width * 3);
/* memcpy(preview_data1, seed_data, 256*256*3); */
if (frame != 0)
{
if (feedbacktype)
{
for (i=0;i<pixels;i++)
{
gint t;
t = preview_data1[i] + seed_data[i] - 128;
preview_data1[i] = /*CLAMP(t,0,255);*/
(t&256)? (~(t>>10)) : t; /* Quick specialized clamp */
}
}
else/* if (0) */
{
gint pixwords = pixels/sizeof(gint32);
gint32* seedwords = (gint32*) seed_data;
gint32* prevwords = (gint32*) preview_data1;
for (i=0;i<pixwords;i++)
{
/*preview_data1[i] = (preview_data1[i]*2 +
seed_data[i]) /3;*/
/* mod'd version of the below for a 'deeper' mix */
prevwords[i] =
((prevwords[i] >> 1) & 0x7f7f7f7f) +
((prevwords[i] >> 2) & 0x3f3f3f3f) +
((seedwords[i] >> 2) & 0x3f3f3f3f);
/* This is from Raph L... it should be a fast 50%/50%
blend, though I don't know if 50%/50% is as nice as
the old ratio. */
/*
prevwords[i] =
((prevwords[i] >> 1) & 0x7f7f7f7f) +
((seedwords[i] >> 1) & 0x7f7f7f7f) +
(prevwords[i] & seedwords[i] & 0x01010101); */
}
}
}
}
else /* GRAYSCALE */
{
domap1(preview_data2, preview_data1,
-(yp-xp)/2, xp+yp
,
xp+yp, (yp-xp)/2
);
gdk_draw_gray_image (drawing_area->window,
drawing_area->style->white_gc,
0, 0, width, height,
GDK_RGB_DITHER_NORMAL,
preview_data1, width);
if (frame != 0)
{
if (feedbacktype)
{
for (i=0;i<pixels;i++)
{
int t;
t = preview_data1[i] + seed_data[i] - 128;
preview_data1[i] = /*CLAMP(t,0,255);*/
(t&256)? (~(t>>10)) : t; /* Quick specialized clamp */
}
}
else
{
gint pixwords = pixels/sizeof(gint32);
gint32* seedwords = (gint32*) seed_data;
gint32* prevwords = (gint32*) preview_data1;
for (i=0;i<pixwords;i++)
{
/* mod'd version of the below for a 'deeper' mix */
prevwords[i] =
((prevwords[i] >> 1) & 0x7f7f7f7f) +
((prevwords[i] >> 2) & 0x3f3f3f3f) +
((seedwords[i] >> 2) & 0x3f3f3f3f);
/* This is from Raph L... it should be a fast 50%/50%
blend, though I don't know if 50%/50% is as nice as
the old ratio. */
/*
prevwords[i] =
((prevwords[i] >> 1) & 0x7f7f7f7f) +
((seedwords[i] >> 1) & 0x7f7f7f7f) +
(prevwords[i] & seedwords[i] & 0x01010101); */
}
}
}
}
frame++;
}
static void
init_preview_misc (void)
{
GimpPixelRgn pixel_rgn;
gint i;
gboolean has_alpha;
if ((imagetype == GIMP_RGB) || (imagetype == GIMP_INDEXED))
rgb_mode = TRUE;
else
rgb_mode = FALSE;
has_alpha = gimp_drawable_has_alpha(drawable->drawable_id);
seed_data = g_malloc(width*height*4);
preview_data1 = g_malloc(width*height*(rgb_mode?3:1));
preview_data2 = g_malloc(width*height*(rgb_mode?3:1));
if ((drawable->width<256) || (drawable->height<256))
{
for (i=0;i<256;i++)
{
if (i < drawable->height)
{
gimp_pixel_rgn_init (&pixel_rgn,
drawable,
drawable->width>256?
(drawable->width/2-128):0,
(drawable->height>256?
(drawable->height/2-128):0)+i,
MIN(256,drawable->width),
1,
FALSE,
FALSE);
gimp_pixel_rgn_get_rect (&pixel_rgn,
&seed_data[(256*i +
(
(
drawable->width<256 ?
(256-drawable->width)/2 :
0
)
+
(
drawable->height<256 ?
(256-drawable->height)/2 :
0
) * 256
)) *
gimp_drawable_bpp
(drawable->drawable_id)
],
drawable->width>256?
(drawable->width/2-128):0,
(drawable->height>256?
(drawable->height/2-128):0)+i,
MIN(256,drawable->width),
1);
}
}
}
else
{
gimp_pixel_rgn_init (&pixel_rgn,
drawable,
drawable->width>256?(drawable->width/2-128):0,
drawable->height>256?(drawable->height/2-128):0,
MIN(256,drawable->width),
MIN(256,drawable->height),
FALSE,
FALSE);
gimp_pixel_rgn_get_rect (&pixel_rgn,
seed_data,
drawable->width>256?(drawable->width/2-128):0,
drawable->height>256?(drawable->height/2-128):0,
MIN(256,drawable->width),
MIN(256,drawable->height));
}
gimp_drawable_detach(drawable);
/* convert the image data of varying types into flat grey or rgb. */
switch (imagetype)
{
case GIMP_INDEXED:
if (has_alpha)
{
for (i=width*height;i>0;i--)
{
seed_data[3*(i-1)+2] =
((palette[3*(seed_data[(i-1)*2])+2]*seed_data[(i-1)*2+1])/255)
+ ((255-seed_data[(i-1)*2+1]) * g_rand_int_range (gr, 0, 256))/255;
seed_data[3*(i-1)+1] =
((palette[3*(seed_data[(i-1)*2])+1]*seed_data[(i-1)*2+1])/255)
+ ((255-seed_data[(i-1)*2+1]) * g_rand_int_range (gr, 0, 256))/255;
seed_data[3*(i-1)+0] =
((palette[3*(seed_data[(i-1)*2])+0]*seed_data[(i-1)*2+1])/255)
+ ((255-seed_data[(i-1)*2+1]) * g_rand_int_range (gr, 0, 256))/255;
}
}
else
{
for (i=width*height;i>0;i--)
{
seed_data[3*(i-1)+2] = palette[3*(seed_data[i-1])+2];
seed_data[3*(i-1)+1] = palette[3*(seed_data[i-1])+1];
seed_data[3*(i-1)+0] = palette[3*(seed_data[i-1])+0];
}
}
break;
case GIMP_GRAY:
if (has_alpha)
{
for (i=0;i<width*height;i++)
{
seed_data[i] =
(seed_data[i*2]*seed_data[i*2+1])/255
+ ((255-seed_data[i*2+1]) * g_rand_int_range (gr, 0, 256))/255;
}
}
break;
case GIMP_RGB:
if (has_alpha)
{
for (i=0;i<width*height;i++)
{
seed_data[i*3+2] =
(seed_data[i*4+2]*seed_data[i*4+3])/255
+ ((255-seed_data[i*4+3]) * g_rand_int_range (gr, 0, 256))/255;
seed_data[i*3+1] =
(seed_data[i*4+1]*seed_data[i*4+3])/255
+ ((255-seed_data[i*4+3]) * g_rand_int_range (gr, 0, 256))/255;
seed_data[i*3+0] =
(seed_data[i*4+0]*seed_data[i*4+3])/255
+ ((255-seed_data[i*4+3]) * g_rand_int_range (gr, 0, 256))/255;
}
}
break;
default:
break;
}
}
/* Util. */
static gboolean
do_iteration (void)
{
render_frame ();
return TRUE;
}
/* Callbacks */
static void
window_response_callback (GtkWidget *widget,
gint response_id,
gpointer data)
{
g_source_remove (idle_tag);
idle_tag = 0;
gtk_widget_destroy (widget);
}
static gboolean
toggle_feedbacktype (GtkWidget *widget,
GdkEventButton *bevent)
{
if (bevent->state & (GDK_SHIFT_MASK | GDK_CONTROL_MASK | GDK_MOD1_MASK))
{
wiggleamp = bevent->x/5;
wiggly = TRUE;
init_lut();
return TRUE;
}
if (bevent->state & GDK_BUTTON1_MASK)
feedbacktype = !feedbacktype;
if (bevent->state & GDK_BUTTON2_MASK)
wiggly = !wiggly;
if (bevent->state & GDK_BUTTON3_MASK)
{
if (wiggleamp == LOWAMP)
wiggleamp = HIGHAMP;
else
wiggleamp = LOWAMP;
wiggly = TRUE;
init_lut ();
}
return TRUE;
}
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