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gimp/plug-ins/common/depthmerge.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* Depth Merge -- Combine two image layers via corresponding depth maps
* Copyright (C) 1997, 1998 Sean Cier (scier@PostHorizon.com)
*
* 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.
*/
/* Version 1.0.0: (14 August 1998)
* Math optimizations, miscellaneous speedups
*
* Version 0.1: (6 July 1997)
* Initial Release
*/
#include "config.h"
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define DEBUG
#ifndef LERP
#define LERP(frac,a,b) ((frac)*(b) + (1-(frac))*(a))
#endif
#define MUL255(i) ((i)*256 - (i))
#define DIV255(i) (((i) + (i)/256 + 1) / 256)
#define PLUG_IN_PROC "plug-in-depth-merge"
#define PLUG_IN_VERSION "August 1998"
#define PREVIEW_SIZE 256
/* ----- DepthMerge ----- */
struct _DepthMerge;
typedef struct _DepthMergeInterface
{
gboolean active;
GtkWidget *dialog;
GtkWidget *preview;
gint previewWidth;
gint previewHeight;
guchar *previewSource1;
guchar *previewSource2;
guchar *previewDepthMap1;
guchar *previewDepthMap2;
} DepthMergeInterface;
typedef struct _DepthMergeParams
{
gint32 result;
gint32 source1;
gint32 source2;
gint32 depthMap1;
gint32 depthMap2;
gfloat overlap;
gfloat offset;
gfloat scale1;
gfloat scale2;
} DepthMergeParams;
typedef struct _DepthMerge
{
DepthMergeInterface *interface;
DepthMergeParams params;
GimpDrawable *resultDrawable;
GimpDrawable *source1Drawable;
GimpDrawable *source2Drawable;
GimpDrawable *depthMap1Drawable;
GimpDrawable *depthMap2Drawable;
gint selectionX0;
gint selectionY0;
gint selectionX1;
gint selectionY1;
gint selectionWidth;
gint selectionHeight;
gint resultHasAlpha;
} DepthMerge;
static void DepthMerge_initParams (DepthMerge *dm);
static void DepthMerge_construct (DepthMerge *dm);
static void DepthMerge_destroy (DepthMerge *dm);
static gint32 DepthMerge_execute (DepthMerge *dm);
static void DepthMerge_executeRegion (DepthMerge *dm,
guchar *source1Row,
guchar *source2Row,
guchar *depthMap1Row,
guchar *depthMap2Row,
guchar *resultRow,
gint length);
static gboolean DepthMerge_dialog (DepthMerge *dm);
static void DepthMerge_buildPreviewSourceImage (DepthMerge *dm);
static void DepthMerge_updatePreview (DepthMerge *dm);
static gboolean dm_constraint (gint32 imageId,
gint32 drawableId,
gpointer data);
static void dialogSource1ChangedCallback (GtkWidget *widget, DepthMerge *dm);
static void dialogSource2ChangedCallback (GtkWidget *widget, DepthMerge *dm);
static void dialogDepthMap1ChangedCallback (GtkWidget *widget, DepthMerge *dm);
static void dialogDepthMap2ChangedCallback (GtkWidget *widget, DepthMerge *dm);
static void dialogValueScaleUpdateCallback (GtkAdjustment *adjustment,
gpointer data);
static void util_fillReducedBuffer (guchar *dest,
gint destWidth,
gint destHeight,
gint destBPP,
gboolean destHasAlpha,
GimpDrawable *sourceDrawable,
gint x0,
gint y0,
gint sourceWidth,
gint sourceHeight);
static void util_convertColorspace (guchar *dest,
gint destBPP,
gboolean destHasAlpha,
const guchar *source,
gint sourceBPP,
gboolean sourceHasAlpha,
gint length);
/* ----- plug-in entry points ----- */
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
const GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run /* run_proc */
};
MAIN ()
static void
query (void)
{
static const GimpParamDef args[] =
{
{ GIMP_PDB_INT32, "run-mode", "Interactive, non-interactive" },
{ GIMP_PDB_IMAGE, "image", "Input image (unused)" },
{ GIMP_PDB_DRAWABLE, "result", "Result" },
{ GIMP_PDB_DRAWABLE, "source1", "Source 1" },
{ GIMP_PDB_DRAWABLE, "source2", "Source 2" },
{ GIMP_PDB_DRAWABLE, "depthMap1", "Depth map 1" },
{ GIMP_PDB_DRAWABLE, "depthMap2", "Depth map 2" },
{ GIMP_PDB_FLOAT, "overlap", "Overlap" },
{ GIMP_PDB_FLOAT, "offset", "Depth relative offset" },
{ GIMP_PDB_FLOAT, "scale1", "Depth relative scale 1" },
{ GIMP_PDB_FLOAT, "scale2", "Depth relative scale 2" }
};
gimp_install_procedure (PLUG_IN_PROC,
N_("Combine two images using depth maps (z-buffers)"),
"Taking as input two full-color, full-alpha "
"images and two corresponding grayscale depth "
"maps, this plug-in combines the images based "
"on which is closer (has a lower depth map value) "
"at each point.",
"Sean Cier",
"Sean Cier",
PLUG_IN_VERSION,
N_("_Depth Merge..."),
"RGB*, GRAY*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
gimp_plugin_menu_register (PLUG_IN_PROC, "<Image>/Filters/Combine");
}
static void
run (const gchar *name,
gint numParams,
const GimpParam *param,
gint *numReturnVals,
GimpParam **returnVals)
{
static GimpParam values[1];
GimpRunMode runMode;
GimpPDBStatusType status;
DepthMerge dm;
INIT_I18N ();
runMode = (GimpRunMode) param[0].data.d_int32;
status = GIMP_PDB_SUCCESS;
*numReturnVals = 1;
*returnVals = values;
switch (runMode)
{
case GIMP_RUN_INTERACTIVE:
DepthMerge_initParams (&dm);
gimp_get_data (PLUG_IN_PROC, &(dm.params));
dm.params.result = param[2].data.d_drawable;
DepthMerge_construct (&dm);
if (!DepthMerge_dialog (&dm))
{
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = GIMP_PDB_SUCCESS;
return;
}
break;
case GIMP_RUN_NONINTERACTIVE:
DepthMerge_initParams (&dm);
if (numParams != 11)
status = GIMP_PDB_CALLING_ERROR;
else
{
dm.params.result = param[ 2].data.d_drawable;
dm.params.source1 = param[ 3].data.d_drawable;
dm.params.source2 = param[ 4].data.d_drawable;
dm.params.depthMap1 = param[ 5].data.d_drawable;
dm.params.depthMap2 = param[ 6].data.d_drawable;
dm.params.overlap = param[ 7].data.d_float;
dm.params.offset = param[ 8].data.d_float;
dm.params.scale1 = param[ 9].data.d_float;
dm.params.scale2 = param[10].data.d_float;
}
DepthMerge_construct (&dm);
break;
case GIMP_RUN_WITH_LAST_VALS:
DepthMerge_initParams (&dm);
gimp_get_data (PLUG_IN_PROC, &(dm.params));
DepthMerge_construct (&dm);
break;
default:
status = GIMP_PDB_CALLING_ERROR;
}
if (status == GIMP_PDB_SUCCESS)
{
gimp_tile_cache_ntiles ((dm.resultDrawable->width +
gimp_tile_width () - 1) / gimp_tile_width ());
if (!DepthMerge_execute (&dm))
status = GIMP_PDB_EXECUTION_ERROR;
else
{
if (runMode != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush ();
if (runMode == GIMP_RUN_INTERACTIVE)
gimp_set_data (PLUG_IN_PROC,
&(dm.params), sizeof (DepthMergeParams));
}
}
DepthMerge_destroy (&dm);
values[0].data.d_status = status;
}
/* ----- DepthMerge ----- */
static void
DepthMerge_initParams (DepthMerge *dm)
{
dm->params.result = -1;
dm->params.source1 = -1;
dm->params.source2 = -1;
dm->params.depthMap1 = -1;
dm->params.depthMap2 = -1;
dm->params.overlap = 0;
dm->params.offset = 0;
dm->params.scale1 = 1;
dm->params.scale2 = 1;
}
static void
DepthMerge_construct (DepthMerge *dm)
{
dm->interface = NULL;
dm->resultDrawable = gimp_drawable_get (dm->params.result);
gimp_drawable_mask_bounds (dm->resultDrawable->drawable_id,
&(dm->selectionX0), &(dm->selectionY0),
&(dm->selectionX1), &(dm->selectionY1));
dm->selectionWidth = dm->selectionX1 - dm->selectionX0;
dm->selectionHeight = dm->selectionY1 - dm->selectionY0;
dm->resultHasAlpha = gimp_drawable_has_alpha (dm->resultDrawable->drawable_id);
dm->source1Drawable =
(dm->params.source1 == -1) ? NULL : gimp_drawable_get (dm->params.source1);
dm->source2Drawable =
(dm->params.source2 == -1) ? NULL : gimp_drawable_get (dm->params.source2);
dm->depthMap1Drawable =
(dm->params.depthMap1 == -1) ?
NULL : gimp_drawable_get (dm->params.depthMap1);
dm->depthMap2Drawable =
(dm->params.depthMap2 == -1) ?
NULL : gimp_drawable_get (dm->params.depthMap2);
dm->params.overlap = CLAMP (dm->params.overlap, 0, 2);
dm->params.offset = CLAMP (dm->params.offset, -1, 1);
dm->params.scale1 = CLAMP (dm->params.scale1, -1, 1);
dm->params.scale2 = CLAMP (dm->params.scale2, -1, 1);
}
static void
DepthMerge_destroy (DepthMerge *dm)
{
if (dm->interface != NULL)
{
g_free (dm->interface->previewSource1);
g_free (dm->interface->previewSource2);
g_free (dm->interface->previewDepthMap1);
g_free (dm->interface->previewDepthMap2);
g_free (dm->interface);
}
if (dm->resultDrawable != NULL)
gimp_drawable_detach (dm->resultDrawable);
if (dm->source1Drawable != NULL)
gimp_drawable_detach (dm->source1Drawable);
if (dm->source2Drawable != NULL)
gimp_drawable_detach (dm->source2Drawable);
if (dm->depthMap1Drawable != NULL)
gimp_drawable_detach (dm->depthMap1Drawable);
if (dm->depthMap2Drawable != NULL)
gimp_drawable_detach (dm->depthMap2Drawable);
}
static gint32
DepthMerge_execute (DepthMerge *dm)
{
int x, y;
GimpPixelRgn source1Rgn, source2Rgn;
GimpPixelRgn depthMap1Rgn, depthMap2Rgn;
GimpPixelRgn resultRgn;
guchar *source1Row, *source2Row;
guchar *depthMap1Row, *depthMap2Row;
guchar *resultRow;
guchar *tempRow;
gboolean source1HasAlpha;
gboolean source2HasAlpha;
gboolean depthMap1HasAlpha;
gboolean depthMap2HasAlpha;
/* initialize */
source1HasAlpha = FALSE;
source2HasAlpha = FALSE;
depthMap1HasAlpha = FALSE;
depthMap2HasAlpha = FALSE;
gimp_progress_init (_("Depth-merging"));
resultRow = g_new (guchar, dm->selectionWidth * 4);
source1Row = g_new (guchar, dm->selectionWidth * 4);
source2Row = g_new (guchar, dm->selectionWidth * 4);
depthMap1Row = g_new (guchar, dm->selectionWidth );
depthMap2Row = g_new (guchar, dm->selectionWidth );
tempRow = g_new (guchar, dm->selectionWidth * 4);
if (dm->source1Drawable != NULL)
{
source1HasAlpha = gimp_drawable_has_alpha (dm->source1Drawable->drawable_id);
gimp_pixel_rgn_init (&source1Rgn, dm->source1Drawable,
dm->selectionX0, dm->selectionY0,
dm->selectionWidth, dm->selectionHeight,
FALSE, FALSE);
}
else
for (x = 0; x < dm->selectionWidth; x++)
{
source1Row[4 * x ] = 0;
source1Row[4 * x + 1] = 0;
source1Row[4 * x + 2] = 0;
source1Row[4 * x + 3] = 255;
}
if (dm->source2Drawable != NULL)
{
source2HasAlpha = gimp_drawable_has_alpha (dm->source2Drawable->drawable_id);
gimp_pixel_rgn_init (&source2Rgn, dm->source2Drawable,
dm->selectionX0, dm->selectionY0,
dm->selectionWidth, dm->selectionHeight,
FALSE, FALSE);
}
else
for (x = 0; x < dm->selectionWidth; x++)
{
source2Row[4 * x ] = 0;
source2Row[4 * x + 1] = 0;
source2Row[4 * x + 2] = 0;
source2Row[4 * x + 3] = 255;
}
if (dm->depthMap1Drawable != NULL)
{
depthMap1HasAlpha = gimp_drawable_has_alpha (dm->depthMap1Drawable->drawable_id);
gimp_pixel_rgn_init (&depthMap1Rgn, dm->depthMap1Drawable,
dm->selectionX0, dm->selectionY0,
dm->selectionWidth, dm->selectionHeight,
FALSE, FALSE);
}
else
for (x = 0; x < dm->selectionWidth; x++)
{
depthMap1Row[x] = 0;
}
if (dm->depthMap2Drawable != NULL)
{
depthMap2HasAlpha = gimp_drawable_has_alpha (dm->depthMap2Drawable->drawable_id);
gimp_pixel_rgn_init (&depthMap2Rgn, dm->depthMap2Drawable,
dm->selectionX0, dm->selectionY0,
dm->selectionWidth, dm->selectionHeight,
FALSE, FALSE);
}
else
for (x = 0; x < dm->selectionWidth; x++)
{
depthMap2Row[x] = 0;
}
gimp_pixel_rgn_init (&resultRgn, dm->resultDrawable,
dm->selectionX0, dm->selectionY0,
dm->selectionWidth, dm->selectionHeight,
TRUE, TRUE);
for (y = dm->selectionY0; y < dm->selectionY1; y++)
{
if (dm->source1Drawable != NULL)
{
gimp_pixel_rgn_get_row (&source1Rgn, tempRow,
dm->selectionX0, y,
dm->selectionWidth);
util_convertColorspace (source1Row, 4, TRUE,
tempRow,
dm->source1Drawable->bpp, source1HasAlpha,
dm->selectionWidth);
}
if (dm->source2Drawable != NULL)
{
gimp_pixel_rgn_get_row (&source2Rgn, tempRow,
dm->selectionX0, y,
dm->selectionWidth);
util_convertColorspace (source2Row, 4, TRUE,
tempRow,
dm->source2Drawable->bpp, source2HasAlpha,
dm->selectionWidth);
}
if (dm->depthMap1Drawable != NULL)
{
gimp_pixel_rgn_get_row (&depthMap1Rgn, tempRow,
dm->selectionX0, y,
dm->selectionWidth);
util_convertColorspace (depthMap1Row, 1, FALSE,
tempRow,
dm->depthMap1Drawable->bpp, depthMap1HasAlpha,
dm->selectionWidth);
}
if (dm->depthMap2Drawable != NULL)
{
gimp_pixel_rgn_get_row (&depthMap2Rgn, tempRow,
dm->selectionX0, y,
dm->selectionWidth);
util_convertColorspace (depthMap2Row, 1, FALSE,
tempRow,
dm->depthMap2Drawable->bpp, depthMap2HasAlpha,
dm->selectionWidth);
}
DepthMerge_executeRegion (dm,
source1Row, source2Row, depthMap1Row, depthMap2Row,
resultRow,
dm->selectionWidth);
util_convertColorspace (tempRow, dm->resultDrawable->bpp, dm->resultHasAlpha,
resultRow, 4, TRUE,
dm->selectionWidth);
gimp_pixel_rgn_set_row (&resultRgn, tempRow,
dm->selectionX0, y,
dm->selectionWidth);
gimp_progress_update ((double)(y-dm->selectionY0) /
(double)(dm->selectionHeight - 1));
}
g_free (resultRow);
g_free (source1Row);
g_free (source2Row);
g_free (depthMap1Row);
g_free (depthMap2Row);
g_free (tempRow);
gimp_drawable_flush (dm->resultDrawable);
gimp_drawable_merge_shadow (dm->resultDrawable->drawable_id, TRUE);
gimp_drawable_update (dm->resultDrawable->drawable_id,
dm->selectionX0, dm->selectionY0,
dm->selectionWidth, dm->selectionHeight);
return TRUE;
}
static void
DepthMerge_executeRegion (DepthMerge *dm,
guchar *source1Row,
guchar *source2Row,
guchar *depthMap1Row,
guchar *depthMap2Row,
guchar *resultRow,
gint length)
{
gfloat scale1, scale2, offset255, invOverlap255;
gfloat frac, depth1, depth2;
gushort c1[4], c2[4];
gushort cR1[4] = { 0, 0, 0, 0 }, cR2[4] = { 0, 0, 0, 0 };
gushort cR[4], temp;
gint i, tempInt;
invOverlap255 = 1.0 / (MAX (dm->params.overlap, 0.001) * 255);
offset255 = dm->params.offset * 255;
scale1 = dm->params.scale1;
scale2 = dm->params.scale2;
for (i = 0; i < length; i++)
{
depth1 = (gfloat) depthMap1Row[i];
depth2 = (gfloat) depthMap2Row[i];
frac = (depth2 * scale2 - (depth1 * scale1 + offset255)) * invOverlap255;
frac = 0.5 * (frac + 1.0);
frac = CLAMP(frac, 0.0, 1.0);
/* c1 -> color corresponding to source1 */
c1[0] = source1Row[4 * i ];
c1[1] = source1Row[4 * i + 1];
c1[2] = source1Row[4 * i + 2];
c1[3] = source1Row[4 * i + 3];
/* c2 -> color corresponding to source2 */
c2[0] = source2Row[4 * i ];
c2[1] = source2Row[4 * i + 1];
c2[2] = source2Row[4 * i + 2];
c2[3] = source2Row[4 * i + 3];
if (frac != 0)
{
/* cR1 -> result if c1 is completely on top */
cR1[0] = c1[3] * c1[0] + (255 - c1[3]) * c2[0];
cR1[1] = c1[3] * c1[1] + (255 - c1[3]) * c2[1];
cR1[2] = c1[3] * c1[2] + (255 - c1[3]) * c2[2];
cR1[3] = MUL255 (c1[3]) + (255 - c1[3]) * c2[3];
}
if (frac != 1)
{
/* cR2 -> result if c2 is completely on top */
cR2[0] = c2[3] * c2[0] + (255 - c2[3]) * c1[0];
cR2[1] = c2[3] * c2[1] + (255 - c2[3]) * c1[1];
cR2[2] = c2[3] * c2[2] + (255 - c2[3]) * c1[2];
cR2[3] = MUL255 (c2[3]) + (255 - c2[3]) * c1[3];
}
if (frac == 1)
{
cR[0] = cR1[0];
cR[1] = cR1[1];
cR[2] = cR1[2];
cR[3] = cR1[3];
}
else if (frac == 0)
{
cR[0] = cR2[0];
cR[1] = cR2[1];
cR[2] = cR2[2];
cR[3] = cR2[3];
}
else
{
tempInt = LERP (frac, cR2[0], cR1[0]);
cR[0] = CLAMP (tempInt,0,255 * 255);
tempInt = LERP (frac, cR2[1], cR1[1]);
cR[1] = CLAMP (tempInt,0,255 * 255);
tempInt = LERP (frac, cR2[2], cR1[2]);
cR[2] = CLAMP (tempInt,0,255 * 255);
tempInt = LERP (frac, cR2[3], cR1[3]);
cR[3] = CLAMP (tempInt,0,255 * 255);
}
temp = DIV255 (cR[0]); resultRow[4 * i ] = MIN (temp, 255);
temp = DIV255 (cR[1]); resultRow[4 * i + 1] = MIN (temp, 255);
temp = DIV255 (cR[2]); resultRow[4 * i + 2] = MIN (temp, 255);
temp = DIV255 (cR[3]); resultRow[4 * i + 3] = MIN (temp, 255);
}
}
static gboolean
DepthMerge_dialog (DepthMerge *dm)
{
GtkWidget *dialog;
GtkWidget *vbox;
GtkWidget *frame;
GtkWidget *table;
GtkWidget *hbox;
GtkWidget *label;
GtkWidget *combo;
GtkObject *adj;
gboolean run;
dm->interface = g_new0 (DepthMergeInterface, 1);
gimp_ui_init ("depthmerge", TRUE);
dm->interface->dialog =
dialog = gimp_dialog_new (_("Depth Merge"), "depthmerge",
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));
vbox = gtk_vbox_new (FALSE, 12);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 12);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox),
vbox, FALSE, FALSE, 0);
gtk_widget_show (vbox);
/* Preview */
hbox = gtk_hbox_new (FALSE, 0);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (hbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
dm->interface->previewWidth = MIN (dm->selectionWidth, PREVIEW_SIZE);
dm->interface->previewHeight = MIN (dm->selectionHeight, PREVIEW_SIZE);
dm->interface->preview = gimp_preview_area_new ();
gtk_widget_set_size_request (dm->interface->preview,
dm->interface->previewWidth,
dm->interface->previewHeight);
gtk_container_add (GTK_CONTAINER (frame), dm->interface->preview);
gtk_widget_show (dm->interface->preview);
DepthMerge_buildPreviewSourceImage (dm);
/* Source and Depth Map selection */
table = gtk_table_new (8, 3, FALSE);
gtk_table_set_col_spacings (GTK_TABLE (table), 6);
gtk_table_set_row_spacings (GTK_TABLE (table), 6);
gtk_table_set_row_spacing (GTK_TABLE (table), 1, 12);
gtk_table_set_row_spacing (GTK_TABLE (table), 3, 12);
gtk_box_pack_start (GTK_BOX (vbox), table, FALSE, FALSE, 0);
gtk_widget_show (table);
label = gtk_label_new (_("Source 1:"));
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 0, 1,
GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (label);
combo = gimp_drawable_combo_box_new (dm_constraint, dm);
gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo), dm->params.source1,
G_CALLBACK (dialogSource1ChangedCallback),
dm);
gtk_table_attach (GTK_TABLE (table), combo, 1, 3, 0, 1,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show (combo);
label = gtk_label_new(_("Depth map:"));
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 1, 2,
GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (label);
combo = gimp_drawable_combo_box_new (dm_constraint, dm);
gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo), dm->params.depthMap1,
G_CALLBACK (dialogDepthMap1ChangedCallback),
dm);
gtk_table_attach (GTK_TABLE (table), combo, 1, 3, 1, 2,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show (combo);
label = gtk_label_new (_("Source 2:"));
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 2, 3,
GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (label);
combo = gimp_drawable_combo_box_new (dm_constraint, dm);
gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo), dm->params.source2,
G_CALLBACK (dialogSource2ChangedCallback),
dm);
gtk_table_attach (GTK_TABLE (table), combo, 1, 3, 2, 3,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show (combo);
label = gtk_label_new (_("Depth map:"));
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 3, 4,
GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (label);
combo = gimp_drawable_combo_box_new (dm_constraint, dm);
gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo), dm->params.depthMap2,
G_CALLBACK (dialogDepthMap2ChangedCallback),
dm);
gtk_table_attach (GTK_TABLE (table), combo, 1, 3, 3, 4,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show (combo);
/* Numeric parameters */
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 4,
_("O_verlap:"), 0, 6,
dm->params.overlap, 0, 2, 0.001, 0.01, 3,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value-changed",
G_CALLBACK (dialogValueScaleUpdateCallback),
&(dm->params.overlap));
g_object_set_data (G_OBJECT (adj), "dm", dm);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 5,
_("O_ffset:"), 0, 6,
dm->params.offset, -1, 1, 0.001, 0.01, 3,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value-changed",
G_CALLBACK (dialogValueScaleUpdateCallback),
&(dm->params.offset));
g_object_set_data (G_OBJECT (adj), "dm", dm);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 6,
_("Sc_ale 1:"), 0, 6,
dm->params.scale1, -1, 1, 0.001, 0.01, 3,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value-changed",
G_CALLBACK (dialogValueScaleUpdateCallback),
&(dm->params.scale1));
g_object_set_data (G_OBJECT (adj), "dm", dm);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 7,
_("Sca_le 2:"), 0, 6,
dm->params.scale2, -1, 1, 0.001, 0.01, 3,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value-changed",
G_CALLBACK (dialogValueScaleUpdateCallback),
&(dm->params.scale2));
g_object_set_data (G_OBJECT (adj), "dm", dm);
dm->interface->active = TRUE;
gtk_widget_show (dm->interface->dialog);
DepthMerge_updatePreview (dm);
run = (gimp_dialog_run (GIMP_DIALOG (dm->interface->dialog)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dm->interface->dialog);
dm->interface->dialog = NULL;
return run;
}
static void
DepthMerge_buildPreviewSourceImage (DepthMerge *dm)
{
dm->interface->previewSource1 =
g_new (guchar, dm->interface->previewWidth *
dm->interface->previewHeight * 4);
util_fillReducedBuffer (dm->interface->previewSource1,
dm->interface->previewWidth,
dm->interface->previewHeight,
4, TRUE,
dm->source1Drawable,
dm->selectionX0, dm->selectionY0,
dm->selectionWidth, dm->selectionHeight);
dm->interface->previewSource2 =
g_new (guchar, dm->interface->previewWidth *
dm->interface->previewHeight * 4);
util_fillReducedBuffer (dm->interface->previewSource2,
dm->interface->previewWidth,
dm->interface->previewHeight,
4, TRUE,
dm->source2Drawable,
dm->selectionX0, dm->selectionY0,
dm->selectionWidth, dm->selectionHeight);
dm->interface->previewDepthMap1 =
g_new (guchar, dm->interface->previewWidth *
dm->interface->previewHeight * 1);
util_fillReducedBuffer (dm->interface->previewDepthMap1,
dm->interface->previewWidth,
dm->interface->previewHeight,
1, FALSE,
dm->depthMap1Drawable,
dm->selectionX0, dm->selectionY0,
dm->selectionWidth, dm->selectionHeight);
dm->interface->previewDepthMap2 =
g_new (guchar, dm->interface->previewWidth *
dm->interface->previewHeight * 1);
util_fillReducedBuffer (dm->interface->previewDepthMap2,
dm->interface->previewWidth,
dm->interface->previewHeight,
1, FALSE,
dm->depthMap2Drawable,
dm->selectionX0, dm->selectionY0,
dm->selectionWidth, dm->selectionHeight);
}
static void
DepthMerge_updatePreview (DepthMerge *dm)
{
gint y;
guchar *source1Row, *source2Row;
guchar *depthMap1Row, *depthMap2Row;
guchar *resultRGBA;
if (!dm->interface->active)
return;
resultRGBA = g_new (guchar, 4 * dm->interface->previewWidth *
dm->interface->previewHeight);
for (y = 0; y < dm->interface->previewHeight; y++)
{
source1Row =
&(dm->interface->previewSource1[ y * dm->interface->previewWidth * 4]);
source2Row =
&(dm->interface->previewSource2[ y * dm->interface->previewWidth * 4]);
depthMap1Row =
&(dm->interface->previewDepthMap1[y * dm->interface->previewWidth ]);
depthMap2Row =
&(dm->interface->previewDepthMap2[y * dm->interface->previewWidth ]);
DepthMerge_executeRegion(dm,
source1Row, source2Row, depthMap1Row, depthMap2Row,
resultRGBA + 4 * y * dm->interface->previewWidth,
dm->interface->previewWidth);
}
gimp_preview_area_draw (GIMP_PREVIEW_AREA (dm->interface->preview),
0, 0,
dm->interface->previewWidth,
dm->interface->previewHeight,
GIMP_RGBA_IMAGE,
resultRGBA,
dm->interface->previewWidth * 4);
g_free(resultRGBA);
}
/* ----- Callbacks ----- */
static gboolean
dm_constraint (gint32 imageId,
gint32 drawableId,
gpointer data)
{
DepthMerge *dm = (DepthMerge *)data;
return ((drawableId == -1) ||
((gimp_drawable_width (drawableId) ==
gimp_drawable_width (dm->params.result)) &&
(gimp_drawable_height (drawableId) ==
gimp_drawable_height (dm->params.result)) &&
((gimp_drawable_is_rgb (drawableId) &&
(gimp_drawable_is_rgb (dm->params.result))) ||
gimp_drawable_is_gray (drawableId))));
}
static void
dialogSource1ChangedCallback (GtkWidget *widget,
DepthMerge *dm)
{
if (dm->source1Drawable)
gimp_drawable_detach (dm->source1Drawable);
gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget),
&dm->params.source1);
dm->source1Drawable = ((dm->params.source1 == -1) ?
NULL :
gimp_drawable_get (dm->params.source1));
util_fillReducedBuffer (dm->interface->previewSource1,
dm->interface->previewWidth,
dm->interface->previewHeight,
4, TRUE,
dm->source1Drawable,
dm->selectionX0, dm->selectionY0,
dm->selectionWidth, dm->selectionHeight);
DepthMerge_updatePreview (dm);
}
static void
dialogSource2ChangedCallback (GtkWidget *widget,
DepthMerge *dm)
{
if (dm->source2Drawable)
gimp_drawable_detach (dm->source2Drawable);
gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget),
&dm->params.source2);
dm->source2Drawable = ((dm->params.source2 == -1) ?
NULL :
gimp_drawable_get (dm->params.source2));
util_fillReducedBuffer (dm->interface->previewSource2,
dm->interface->previewWidth,
dm->interface->previewHeight,
4, TRUE,
dm->source2Drawable,
dm->selectionX0, dm->selectionY0,
dm->selectionWidth, dm->selectionHeight);
DepthMerge_updatePreview (dm);
}
static void
dialogDepthMap1ChangedCallback (GtkWidget *widget,
DepthMerge *dm)
{
if (dm->depthMap1Drawable)
gimp_drawable_detach (dm->depthMap1Drawable);
gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget),
&dm->params.depthMap1);
dm->depthMap1Drawable = ((dm->params.depthMap1 == -1) ?
NULL :
gimp_drawable_get (dm->params.depthMap1));
util_fillReducedBuffer (dm->interface->previewDepthMap1,
dm->interface->previewWidth,
dm->interface->previewHeight,
1, FALSE,
dm->depthMap1Drawable,
dm->selectionX0, dm->selectionY0,
dm->selectionWidth, dm->selectionHeight);
DepthMerge_updatePreview (dm);
}
static void
dialogDepthMap2ChangedCallback (GtkWidget *widget,
DepthMerge *dm)
{
if (dm->depthMap2Drawable)
gimp_drawable_detach (dm->depthMap2Drawable);
gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget),
&dm->params.depthMap2);
dm->depthMap2Drawable = ((dm->params.depthMap2 == -1) ?
NULL :
gimp_drawable_get (dm->params.depthMap2));
util_fillReducedBuffer (dm->interface->previewDepthMap2,
dm->interface->previewWidth,
dm->interface->previewHeight,
1, FALSE,
dm->depthMap2Drawable,
dm->selectionX0, dm->selectionY0,
dm->selectionWidth, dm->selectionHeight);
DepthMerge_updatePreview (dm);
}
static void
dialogValueScaleUpdateCallback (GtkAdjustment *adjustment,
gpointer data)
{
DepthMerge *dm = g_object_get_data (G_OBJECT (adjustment), "dm");
gimp_float_adjustment_update (adjustment, data);
DepthMerge_updatePreview (dm);
}
/* ----- Utility routines ----- */
static void
util_fillReducedBuffer (guchar *dest,
gint destWidth,
gint destHeight,
gint destBPP,
gboolean destHasAlpha,
GimpDrawable *sourceDrawable,
gint x0,
gint y0,
gint sourceWidth,
gint sourceHeight)
{
GimpPixelRgn rgn;
guchar *sourceBuffer, *reducedRowBuffer;
guchar *sourceBufferPos, *reducedRowBufferPos;
guchar *sourceBufferRow;
gint x, y, i, yPrime;
gboolean sourceHasAlpha;
gint sourceBpp;
gint *sourceRowOffsetLookup;
if ((sourceDrawable == NULL) || (sourceWidth == 0) || (sourceHeight == 0))
{
for (x = 0; x < destWidth * destHeight * destBPP; x++)
dest[x] = 0;
return;
}
sourceBpp = sourceDrawable->bpp;
sourceBuffer = g_new (guchar, sourceWidth * sourceHeight * sourceBpp);
reducedRowBuffer = g_new (guchar, destWidth * sourceBpp);
sourceRowOffsetLookup = g_new (int, destWidth);
gimp_pixel_rgn_init (&rgn, sourceDrawable,
x0, y0, sourceWidth, sourceHeight,
FALSE, FALSE);
sourceHasAlpha = gimp_drawable_has_alpha (sourceDrawable->drawable_id);
for (x = 0; x < destWidth; x++)
sourceRowOffsetLookup[x] = (x * (sourceWidth - 1) / (destWidth - 1)) * sourceBpp;
gimp_pixel_rgn_get_rect (&rgn, sourceBuffer,
x0, y0, sourceWidth, sourceHeight);
for (y = 0; y < destHeight; y++)
{
yPrime = y * (sourceHeight - 1) / (destHeight - 1);
sourceBufferRow = &(sourceBuffer[yPrime * sourceWidth * sourceBpp]);
sourceBufferPos = sourceBufferRow;
reducedRowBufferPos = reducedRowBuffer;
for (x = 0; x < destWidth; x++)
{
sourceBufferPos = sourceBufferRow + sourceRowOffsetLookup[x];
for (i = 0; i < sourceBpp; i++)
reducedRowBufferPos[i] = sourceBufferPos[i];
reducedRowBufferPos += sourceBpp;
}
util_convertColorspace(&(dest[y * destWidth * destBPP]), destBPP, destHasAlpha,
reducedRowBuffer, sourceDrawable->bpp, sourceHasAlpha,
destWidth);
}
g_free (sourceBuffer);
g_free (reducedRowBuffer);
g_free (sourceRowOffsetLookup);
}
/* Utterly pathetic kludge to convert between color spaces;
likes gray and rgb best, of course. Others will be creatively mutilated,
and even rgb->gray is pretty bad */
static void
util_convertColorspace (guchar *dest,
gint destBPP,
gboolean destHasAlpha,
const guchar *source,
gint sourceBPP,
gboolean sourceHasAlpha,
gint length)
{
gint i, j;
gint sourcePos, destPos;
gint accum;
gint sourceColorBPP = sourceHasAlpha ? (sourceBPP - 1) : sourceBPP;
gint destColorBPP = destHasAlpha ? (destBPP - 1) : destBPP;
if ((sourceColorBPP == destColorBPP) &&
(sourceBPP == destBPP ))
{
j = length * sourceBPP;
for (i = 0; i < j; i++)
dest[i] = source[i];
return;
}
if (sourceColorBPP == destColorBPP)
{
for (i = destPos = sourcePos = 0;
i < length;
i++, destPos += destBPP, sourcePos += sourceBPP)
{
for (j = 0; j < destColorBPP; j++)
dest[destPos + j] = source[sourcePos + j];
}
}
else if (sourceColorBPP == 1)
{
/* Duplicate single "gray" source byte across all dest bytes */
for (i = destPos = sourcePos = 0;
i < length;
i++, destPos += destBPP, sourcePos += sourceBPP)
{
for (j = 0; j < destColorBPP; j++)
dest[destPos + j] = source[sourcePos];
}
}
else if (destColorBPP == 1)
{
/* Average all source bytes into single "gray" dest byte */
for (i = destPos = sourcePos = 0;
i < length;
i++, destPos += destBPP, sourcePos += sourceBPP)
{
accum = 0;
for (j = 0; j < sourceColorBPP; j++)
accum += source[sourcePos + j];
dest[destPos] = accum/sourceColorBPP;
}
}
else if (destColorBPP < sourceColorBPP)
{
/* Copy as many corresponding bytes from source to dest as will fit */
for (i = destPos = sourcePos = 0;
i < length;
i++, destPos += destBPP, sourcePos += sourceBPP)
{
for (j = 0; j < destColorBPP; j++)
dest[destPos + j] = source[sourcePos + j];
}
}
else /* destColorBPP > sourceColorBPP */
{
/* Fill extra dest bytes with zero */
for (i = destPos = sourcePos = 0;
i < length;
i++, destPos += destBPP, sourcePos += sourceBPP)
{
for (j = 0; j < sourceColorBPP; j++)
dest[destPos + j] = source[destPos + j];
for ( ; j < destColorBPP; j++)
dest[destPos + j] = 0;
}
}
if (destHasAlpha)
{
if (sourceHasAlpha)
{
for (i = 0, destPos = destColorBPP, sourcePos = sourceColorBPP;
i < length;
i++, destPos += destBPP, sourcePos += sourceBPP)
{
dest[destPos] = source[sourcePos];
}
}
else
{
for (i = 0, destPos = destColorBPP;
i < length;
i++, destPos += destBPP)
{
dest[destPos] = 255;
}
}
}
}
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