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gimp/plug-ins/common/depthmerge.c

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/* Depth Merge -- Combine two image layers via corresponding depth maps
* Copyright (C) 1997, 1998 Sean Cier (scier@PostHorizon.com)
*
* A plug-in for The GIMP
* The GIMP is 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.
*/
/* Version 1.0.0: (14 August 1998)
* Math optimizations, miscellaneous speedups
*
* Version 0.1: (6 July 1997)
* Initial Release
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "gtk/gtk.h"
#include "libgimp/gimp.h"
#include "libgimp/gimpui.h"
#include "config.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_NAME "plug_in_depth_merge"
#define PLUG_IN_VERSION "1.0.0; 14 August 1998"
#define PREVIEW_SIZE 256
#define SCALE_WIDTH 200
#define ENTRY_WIDTH 60
#define CHECK_SIZE 8
#define CHECK_DARK 255*1/3
#define CHECK_LIGHT 255*2/3
/* ----- DepthMerge ----- */
struct _DepthMerge;
typedef struct _DepthMergeValueEdit {
struct _DepthMerge *dm;
float *value;
GtkAdjustment *scaleData;
GtkWidget *entry;
float min, max;
} DepthMergeValueEdit;
typedef struct _DepthMergeInterface {
gint active;
GtkWidget *dialog;
GtkWidget *preview;
gint previewWidth;
gint previewHeight;
DepthMergeValueEdit *overlapValueEdit;
DepthMergeValueEdit *offsetValueEdit;
DepthMergeValueEdit *scale1ValueEdit;
DepthMergeValueEdit *scale2ValueEdit;
guchar *checkRow0, *checkRow1;
guchar *previewSource1, *previewSource2,
*previewDepthMap1, *previewDepthMap2;
gint run;
} DepthMergeInterface;
typedef struct _DepthMergeParams {
gint32 result;
gint32 source1, source2;
gint32 depthMap1, depthMap2;
gfloat overlap;
gfloat offset;
gfloat scale1, scale2;
} DepthMergeParams;
typedef struct _DepthMerge {
DepthMergeInterface *interface;
DepthMergeParams params;
GDrawable *resultDrawable,
*source1Drawable, *source2Drawable,
*depthMap1Drawable, *depthMap2Drawable;
gint selectionX0, selectionY0, selectionX1, selectionY1,
selectionWidth, selectionHeight;
gint resultHasAlpha;
} DepthMerge;
void DepthMerge_initParams( DepthMerge *dm);
void DepthMerge_construct( DepthMerge *dm);
void DepthMerge_destroy( DepthMerge *dm);
gint32 DepthMerge_execute( DepthMerge *dm);
void DepthMerge_executeRegion( DepthMerge *dm,
guchar *source1Row,
guchar *source2Row,
guchar *depthMap1Row,
guchar *depthMap2Row,
guchar *resultRow,
gint length);
gint32 DepthMerge_dialog( DepthMerge *dm);
DepthMergeValueEdit *
DepthMerge_createValueEdit( DepthMerge *dm,
char *title, GtkTable *table,
int row, int startCol,
float *value,
float min, float max, float step);
void DepthMerge_buildPreviewSourceImage(DepthMerge *dm);
void DepthMerge_updatePreview( DepthMerge *dm);
gint constraintResultSizeAndResultColorOrGray(gint32 imageId,
gint32 drawableId, gpointer data);
gint constraintResultSizeAndGray(gint32 imageId,
gint32 drawableId, gpointer data);
void dialogOkCallback( GtkWidget *widget, gpointer data);
void dialogCancelCallback(GtkWidget *widget, gpointer data);
void dialogCloseCallback( GtkWidget *widget, gpointer data);
void dialogSource1ChangedCallback( gint32 id, gpointer data);
void dialogSource2ChangedCallback( gint32 id, gpointer data);
void dialogDepthMap1ChangedCallback(gint32 id, gpointer data);
void dialogDepthMap2ChangedCallback(gint32 id, gpointer data);
void dialogValueScaleUpdateCallback(GtkAdjustment *adjustment, gpointer data);
void dialogValueEntryUpdateCallback(GtkWidget *widget, gpointer data);
void util_fillReducedBuffer(guchar *dest, gint destWidth, gint destHeight,
gint destBPP, gint destHasAlpha,
GDrawable *sourceDrawable,
gint x0, gint y0,
gint sourceWidth, gint sourceHeight);
void util_convertColorspace(guchar *dest,
gint destBPP, gint destHasAlpha,
guchar *source,
gint sourceBPP, gint sourceHasAlpha,
gint length);
/* ----- plug-in entry points ----- */
static void query();
static void run(char *name,
int numParams, GParam *param,
int *numReturnVals, GParam **returnVals);
GPlugInInfo PLUG_IN_INFO = {
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run /* run_proc */
};
MAIN()
static void query() {
static GParamDef args[] = {
{ PARAM_INT32, "run_mode", "Interactive, non-interactive" },
{ PARAM_IMAGE, "image", "Input image (unused)" },
{ PARAM_DRAWABLE, "result", "Result" },
{ PARAM_DRAWABLE, "source1", "Source 1" },
{ PARAM_DRAWABLE, "source2", "Source 2" },
{ PARAM_DRAWABLE, "depthMap1", "Depth map 1" },
{ PARAM_DRAWABLE, "depthMap2", "Depth map 2" },
{ PARAM_FLOAT, "overlap", "Overlap" },
{ PARAM_FLOAT, "offset", "Depth relative offset" },
{ PARAM_FLOAT, "scale1", "Depth relative scale 1" },
{ PARAM_FLOAT, "scale2", "Depth relative scale 2" },
};
static int numArgs = sizeof(args) / sizeof(GParamDef);
INIT_I18N();
gimp_install_procedure(PLUG_IN_NAME,
_("Combine two images using corresponding depth maps (z-buffers)"),
_("Taking as input two full-colour, 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,
_("<Image>/Filters/Combine/Depth Merge"),
"RGB*, GRAY*",
PROC_PLUG_IN,
numArgs,
0,
args,
NULL);
}
static void run(char *name,
int numParams, GParam *param,
int *numReturnVals, GParam **returnVals) {
static GParam values[1];
GRunModeType runMode;
GStatusType status;
DepthMerge dm;
INIT_I18N_UI();
runMode = (GRunModeType)param[0].data.d_int32;
status = STATUS_SUCCESS;
*numReturnVals = 1;
*returnVals = values;
switch (runMode) {
case RUN_INTERACTIVE:
DepthMerge_initParams(&dm);
gimp_get_data(PLUG_IN_NAME, &(dm.params));
dm.params.result = param[2].data.d_drawable;
DepthMerge_construct(&dm);
if (!DepthMerge_dialog(&dm)) {
values[0].type = PARAM_STATUS;
values[0].data.d_status = STATUS_SUCCESS;
return;
}
break;
case RUN_NONINTERACTIVE:
DepthMerge_initParams(&dm);
if (numParams != 11)
status = STATUS_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 RUN_WITH_LAST_VALS:
DepthMerge_initParams(&dm);
gimp_get_data(PLUG_IN_NAME, &(dm.params));
DepthMerge_construct(&dm);
break;
default:
status = STATUS_CALLING_ERROR;
}
if (status == STATUS_SUCCESS) {
gimp_tile_cache_ntiles((dm.resultDrawable->width + gimp_tile_width() - 1) /
gimp_tile_width());
if (!DepthMerge_execute(&dm))
status = STATUS_EXECUTION_ERROR;
else {
if (runMode != RUN_NONINTERACTIVE)
gimp_displays_flush();
if (runMode == RUN_INTERACTIVE)
gimp_set_data(PLUG_IN_NAME, &(dm.params), sizeof(DepthMergeParams));
}
}
DepthMerge_destroy(&dm);
values[0].data.d_status = status;
}
/* ----- DepthMerge ----- */
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;
}
void DepthMerge_construct(DepthMerge *dm) {
dm->interface = NULL;
dm->resultDrawable = gimp_drawable_get(dm->params.result);
gimp_drawable_mask_bounds(dm->resultDrawable->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->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);
}
void DepthMerge_destroy(DepthMerge *dm) {
if (dm->interface != NULL) {
g_free(dm->interface->overlapValueEdit);
g_free(dm->interface->offsetValueEdit );
g_free(dm->interface->scale1ValueEdit );
g_free(dm->interface->scale2ValueEdit );
g_free(dm->interface->checkRow0);
g_free(dm->interface->checkRow1);
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);
}
gint32 DepthMerge_execute(DepthMerge *dm) {
int x, y;
GPixelRgn source1Rgn, source2Rgn, depthMap1Rgn, depthMap2Rgn,
resultRgn;
guchar *source1Row, *source2Row, *depthMap1Row, *depthMap2Row,
*resultRow,
*tempRow;
gint source1HasAlpha, source2HasAlpha,
depthMap1HasAlpha, depthMap2HasAlpha;
/* initialize */
source1HasAlpha = 0;
source2HasAlpha = 0;
depthMap1HasAlpha = 0;
depthMap2HasAlpha = 0;
gimp_progress_init(_("Depth-merging..."));
resultRow = (guchar *)g_malloc(dm->selectionWidth * 4);
source1Row = (guchar *)g_malloc(dm->selectionWidth * 4);
source2Row = (guchar *)g_malloc(dm->selectionWidth * 4);
depthMap1Row = (guchar *)g_malloc(dm->selectionWidth );
depthMap2Row = (guchar *)g_malloc(dm->selectionWidth );
tempRow = (guchar *)g_malloc(dm->selectionWidth * 4);
if (dm->source1Drawable != NULL) {
source1HasAlpha = gimp_drawable_has_alpha(dm->source1Drawable->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->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->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->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->id, TRUE);
gimp_drawable_update(dm->resultDrawable->id,
dm->selectionX0, dm->selectionY0,
dm->selectionWidth, dm->selectionHeight);
return(TRUE);
}
void DepthMerge_executeRegion(DepthMerge *dm,
guchar *source1Row, guchar *source2Row,
guchar *depthMap1Row, guchar *depthMap2Row,
guchar *resultRow, gint length) {
float scale1, scale2, offset255, invOverlap255;
float frac, depth1, depth2;
unsigned short c1[4], c2[4], cR1[4], cR2[4], cR[4], temp;
int 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 = (float)depthMap1Row[i];
depth2 = (float)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);
}
}
gint32 DepthMerge_dialog(DepthMerge *dm) {
GtkWidget *topTable;
GtkWidget *previewFrame;
GtkWidget *sourceTable;
GtkWidget *tempLabel;
GtkWidget *tempOptionMenu;
GtkWidget *tempMenu;
GtkWidget *numericParameterTable;
GtkWidget *tempButton;
gint argc;
gchar **argv;
guchar *color_cube;
dm->interface = (DepthMergeInterface *)g_malloc(sizeof(DepthMergeInterface));
dm->interface->active = FALSE;
dm->interface->run = FALSE;
argc = 1;
argv = g_new(gchar *, 1);
argv[0] = g_strdup(PLUG_IN_NAME);
gtk_init(&argc, &argv);
gtk_rc_parse(gimp_gtkrc());
gdk_set_use_xshm(gimp_use_xshm());
gtk_preview_set_gamma(gimp_gamma());
gtk_preview_set_install_cmap(gimp_install_cmap());
color_cube = gimp_color_cube();
gtk_preview_set_color_cube(color_cube[0],
color_cube[1],
color_cube[2],
color_cube[3]);
gtk_widget_set_default_visual(gtk_preview_get_visual());
gtk_widget_set_default_colormap(gtk_preview_get_cmap());
dm->interface->dialog = gtk_dialog_new();
gtk_window_set_title(GTK_WINDOW(dm->interface->dialog), _("Depth Merge"));
gtk_window_position(GTK_WINDOW(dm->interface->dialog), GTK_WIN_POS_MOUSE);
gtk_container_border_width(GTK_CONTAINER(dm->interface->dialog), 0);
gtk_signal_connect(GTK_OBJECT(dm->interface->dialog), "destroy",
(GtkSignalFunc)dialogCloseCallback, NULL);
/* topTable */
topTable = gtk_table_new(3, 3, FALSE);
gtk_container_border_width(GTK_CONTAINER(topTable), 6);
gtk_table_set_row_spacings(GTK_TABLE(topTable), 4);
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dm->interface->dialog)->vbox), topTable,
FALSE, FALSE, 0);
gtk_widget_show(topTable);
/* Preview */
previewFrame = gtk_frame_new(NULL);
gtk_frame_set_shadow_type(GTK_FRAME(previewFrame), GTK_SHADOW_IN);
gtk_table_attach(GTK_TABLE(topTable), previewFrame, 1, 2, 0, 1, 0, 0, 0, 0);
gtk_widget_show(previewFrame);
dm->interface->previewWidth = MIN(dm->selectionWidth, PREVIEW_SIZE);
dm->interface->previewHeight = MIN(dm->selectionHeight, PREVIEW_SIZE);
dm->interface->preview = gtk_preview_new(GTK_PREVIEW_COLOR);
gtk_preview_size(GTK_PREVIEW(dm->interface->preview),
dm->interface->previewWidth,
dm->interface->previewHeight);
gtk_container_add(GTK_CONTAINER(previewFrame), dm->interface->preview);
gtk_widget_show(dm->interface->preview);
DepthMerge_buildPreviewSourceImage(dm);
/* Source and Depth Map selection */
sourceTable = gtk_table_new(2, 4, FALSE);
gtk_container_border_width(GTK_CONTAINER(sourceTable), 2);
gtk_table_attach(GTK_TABLE(topTable), sourceTable, 0, 3, 1, 2,
GTK_FILL | GTK_EXPAND, GTK_FILL | GTK_EXPAND, 0, 0);
gtk_widget_show(sourceTable);
tempLabel = gtk_label_new(_("Source 1"));
gtk_misc_set_alignment(GTK_MISC(tempLabel), 0.0, 0.5);
gtk_table_attach(GTK_TABLE(sourceTable), tempLabel, 0, 1, 0, 1,
GTK_FILL, GTK_FILL, 4, 0);
gtk_widget_show(tempLabel);
tempOptionMenu = gtk_option_menu_new();
gtk_table_attach(GTK_TABLE(sourceTable), tempOptionMenu, 1, 2, 0, 1,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show(tempOptionMenu);
tempMenu = gimp_drawable_menu_new(
constraintResultSizeAndResultColorOrGray,
dialogSource1ChangedCallback,
dm,
dm->params.source1);
gtk_option_menu_set_menu(GTK_OPTION_MENU(tempOptionMenu), tempMenu);
gtk_widget_show(tempOptionMenu);
tempLabel = gtk_label_new(_("Depth Map"));
gtk_misc_set_alignment(GTK_MISC(tempLabel), 0.0, 0.5);
gtk_table_attach(GTK_TABLE(sourceTable), tempLabel, 2, 3, 0, 1,
GTK_FILL, GTK_FILL, 4, 0);
gtk_widget_show(tempLabel);
tempOptionMenu = gtk_option_menu_new();
gtk_table_attach(GTK_TABLE(sourceTable), tempOptionMenu, 3, 4, 0, 1,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show(tempOptionMenu);
tempMenu = gimp_drawable_menu_new(
constraintResultSizeAndResultColorOrGray,
dialogDepthMap1ChangedCallback,
dm,
dm->params.depthMap1);
gtk_option_menu_set_menu(GTK_OPTION_MENU(tempOptionMenu), tempMenu);
gtk_widget_show(tempOptionMenu);
tempLabel = gtk_label_new(_("Source 2"));
gtk_misc_set_alignment(GTK_MISC(tempLabel), 0.0, 0.5);
gtk_table_attach(GTK_TABLE(sourceTable), tempLabel, 0, 1, 1, 2,
GTK_FILL, GTK_FILL, 4, 0);
gtk_widget_show(tempLabel);
tempOptionMenu = gtk_option_menu_new();
gtk_table_attach(GTK_TABLE(sourceTable), tempOptionMenu, 1, 2, 1, 2,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show(tempOptionMenu);
tempMenu = gimp_drawable_menu_new(
constraintResultSizeAndResultColorOrGray,
dialogSource2ChangedCallback,
dm,
dm->params.source2);
gtk_option_menu_set_menu(GTK_OPTION_MENU(tempOptionMenu), tempMenu);
gtk_widget_show(tempOptionMenu);
tempLabel = gtk_label_new(_("Depth Map"));
gtk_misc_set_alignment(GTK_MISC(tempLabel), 0.0, 0.5);
gtk_table_attach(GTK_TABLE(sourceTable), tempLabel, 2, 3, 1, 2,
GTK_FILL, GTK_FILL, 4, 0);
gtk_widget_show(tempLabel);
tempOptionMenu = gtk_option_menu_new();
gtk_table_attach(GTK_TABLE(sourceTable), tempOptionMenu, 3, 4, 1, 2,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show(tempOptionMenu);
tempMenu = gimp_drawable_menu_new(
constraintResultSizeAndResultColorOrGray,
dialogDepthMap2ChangedCallback,
dm,
dm->params.depthMap2);
gtk_option_menu_set_menu(GTK_OPTION_MENU(tempOptionMenu), tempMenu);
gtk_widget_show(tempOptionMenu);
/* Numeric parameters */
numericParameterTable = gtk_table_new(4, 3, FALSE);
gtk_container_border_width(GTK_CONTAINER(numericParameterTable), 2);
gtk_table_attach(GTK_TABLE(topTable), numericParameterTable, 0, 3, 2, 3,
GTK_FILL | GTK_EXPAND, GTK_FILL | GTK_EXPAND, 0, 0);
gtk_widget_show(numericParameterTable);
dm->interface->overlapValueEdit =
DepthMerge_createValueEdit(dm, _("Overlap"),
GTK_TABLE(numericParameterTable), 0, 0,
&(dm->params.overlap),
0, 2, 0.001);
dm->interface->offsetValueEdit =
DepthMerge_createValueEdit(dm, _("Offset"),
GTK_TABLE(numericParameterTable), 1, 0,
&(dm->params.offset),
-1, 1, 0.001);
dm->interface->scale1ValueEdit =
DepthMerge_createValueEdit(dm, _("Scale 1"),
GTK_TABLE(numericParameterTable), 2, 0,
&(dm->params.scale1),
-1, 1, 0.001);
dm->interface->scale2ValueEdit =
DepthMerge_createValueEdit(dm, _("Scale 2"),
GTK_TABLE(numericParameterTable), 3, 0,
&(dm->params.scale2),
-1, 1, 0.001);
/* Buttons */
gtk_container_border_width(GTK_CONTAINER(GTK_DIALOG(dm->interface->dialog)->action_area), 6);
tempButton = gtk_button_new_with_label(_("OK"));
GTK_WIDGET_SET_FLAGS(tempButton, GTK_CAN_DEFAULT);
gtk_signal_connect(GTK_OBJECT(tempButton), "clicked",
(GtkSignalFunc)dialogOkCallback,
dm);
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dm->interface->dialog)->action_area),
tempButton, TRUE, TRUE, 0);
gtk_widget_grab_default(tempButton);
gtk_widget_show(tempButton);
tempButton = gtk_button_new_with_label(_("Cancel"));
GTK_WIDGET_SET_FLAGS(tempButton, GTK_CAN_DEFAULT);
gtk_signal_connect(GTK_OBJECT(tempButton), "clicked",
(GtkSignalFunc)dialogCancelCallback,
dm);
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dm->interface->dialog)->action_area),
tempButton, TRUE, TRUE, 0);
gtk_widget_show(tempButton);
/* Done */
dm->interface->active = TRUE;
gtk_widget_show(dm->interface->dialog);
DepthMerge_updatePreview(dm);
gtk_main();
gdk_flush();
return(dm->interface->run);
}
DepthMergeValueEdit *DepthMerge_createValueEdit(DepthMerge *dm,
char *title, GtkTable *table,
int row, int startCol,
float *value,
float min, float max,
float step) {
GtkWidget *label;
GtkWidget *scale;
GtkWidget *entry;
GtkObject *scaleData;
DepthMergeValueEdit *valueEdit;
char buf[256];
valueEdit = (DepthMergeValueEdit *)g_malloc(sizeof(DepthMergeValueEdit));
valueEdit->dm = dm;
valueEdit->value = value;
*(valueEdit->value) = CLAMP(*(valueEdit->value), min, max);
label = gtk_label_new(title);
gtk_misc_set_alignment(GTK_MISC(label), 0.0, 1.0);
gtk_table_attach(table, label, startCol, startCol+1, row, row+1,
GTK_FILL, GTK_FILL, 4, 0);
gtk_widget_show(label);
scaleData = gtk_adjustment_new(*value,
min, max,
step, step,
0.0);
gtk_signal_connect(GTK_OBJECT(scaleData), "value_changed",
(GtkSignalFunc)dialogValueScaleUpdateCallback,
valueEdit);
scale = gtk_hscale_new(GTK_ADJUSTMENT(scaleData));
gtk_widget_set_usize(scale, SCALE_WIDTH, 0);
gtk_table_attach(table, scale, startCol+1, startCol+2, row, row+1,
GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);
gtk_scale_set_draw_value(GTK_SCALE(scale), FALSE);
gtk_scale_set_digits(GTK_SCALE(scale), 3);
gtk_range_set_update_policy(GTK_RANGE(scale), GTK_UPDATE_CONTINUOUS);
gtk_widget_show(scale);
entry = gtk_entry_new();
gtk_widget_set_usize(entry, ENTRY_WIDTH, 0);
sprintf(buf, "%0.3f", (float)*value);
gtk_entry_set_text(GTK_ENTRY(entry), buf);
gtk_signal_connect(GTK_OBJECT(entry), "changed",
(GtkSignalFunc) dialogValueEntryUpdateCallback,
valueEdit);
gtk_table_attach(GTK_TABLE(table), entry, startCol+2, startCol+3, row, row+1,
GTK_FILL, GTK_FILL, 4, 0);
gtk_widget_show(entry);
valueEdit->scaleData = GTK_ADJUSTMENT(scaleData);
valueEdit->entry = entry;
valueEdit->min = min;
valueEdit->max = max;
return(valueEdit);
}
void DepthMerge_buildPreviewSourceImage(DepthMerge *dm) {
int x;
dm->interface->checkRow0 = (guchar *)g_malloc(dm->interface->previewWidth *
sizeof(guchar));
dm->interface->checkRow1 = (guchar *)g_malloc(dm->interface->previewWidth *
sizeof(guchar));
for (x = 0; x < dm->interface->previewWidth; x++) {
if ((x / CHECK_SIZE) & 1) {
dm->interface->checkRow0[x] = CHECK_DARK;
dm->interface->checkRow1[x] = CHECK_LIGHT;
} else {
dm->interface->checkRow0[x] = CHECK_LIGHT;
dm->interface->checkRow1[x] = CHECK_DARK;
}
}
dm->interface->previewSource1 =
(guchar *)g_malloc(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 =
(guchar *)g_malloc(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 =
(guchar *)g_malloc(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 =
(guchar *)g_malloc(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);
}
void DepthMerge_updatePreview(DepthMerge *dm) {
int x, y, i;
guchar *source1Row, *source2Row, *depthMap1Row, *depthMap2Row,
*resultRowRGBA, *resultRow,
*checkRow;
if (!dm->interface->active) return;
resultRowRGBA = (guchar *)g_malloc(dm->interface->previewWidth * 4);
resultRow = (guchar *)g_malloc(dm->interface->previewWidth * 3);
for (y = 0; y < dm->interface->previewHeight; y++) {
checkRow = ((y/CHECK_SIZE)&1) ?
dm->interface->checkRow1 :
dm->interface->checkRow0;
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,
resultRowRGBA,
dm->interface->previewWidth);
for (x = 0; x < dm->interface->previewWidth; x++) {
i = ((int)( resultRowRGBA[x*4+3])*(int)resultRowRGBA[x*4 ] +
(int)(255 - resultRowRGBA[x*4+3])*(int)checkRow[x] );
resultRow[x*3 ] = DIV255(i);
i = ((int)( resultRowRGBA[x*4+3])*(int)resultRowRGBA[x*4+1] +
(int)(255 - resultRowRGBA[x*4+3])*(int)checkRow[x] );
resultRow[x*3+1] = DIV255(i);
i = ((int)( resultRowRGBA[x*4+3])*(int)resultRowRGBA[x*4+2] +
(int)(255 - resultRowRGBA[x*4+3])*(int)checkRow[x] );
resultRow[x*3+2] = DIV255(i);
}
gtk_preview_draw_row(GTK_PREVIEW(dm->interface->preview), resultRow, 0, y,
dm->interface->previewWidth);
}
g_free(resultRowRGBA);
g_free(resultRow);
gtk_widget_draw(dm->interface->preview, NULL);
gdk_flush();
}
/* ----- Callbacks ----- */
gint constraintResultSizeAndResultColorOrGray(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_color(drawableId) &&
(gimp_drawable_color(dm->params.result))) ||
gimp_drawable_gray( drawableId))));
}
gint constraintResultSizeAndGray(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_gray( drawableId))));
}
void dialogOkCallback(GtkWidget *widget, gpointer data) {
DepthMerge *dm = (DepthMerge *)data;
dm->interface->run = TRUE;
gtk_widget_destroy(dm->interface->dialog);
}
void dialogCancelCallback(GtkWidget *widget, gpointer data) {
DepthMerge *dm = (DepthMerge *)data;
dm->interface->run = FALSE;
gtk_widget_destroy(dm->interface->dialog);
}
void dialogCloseCallback(GtkWidget *widget, gpointer data) {
gtk_main_quit();
}
void dialogSource1ChangedCallback(gint32 id, gpointer data) {
DepthMerge *dm = (DepthMerge *)data;
if (dm->source1Drawable != NULL)
gimp_drawable_detach(dm->source1Drawable );
dm->params.source1 = id;
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);
}
void dialogSource2ChangedCallback(gint32 id, gpointer data) {
DepthMerge *dm = (DepthMerge *)data;
if (dm->source2Drawable != NULL)
gimp_drawable_detach(dm->source2Drawable );
dm->params.source2 = id;
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);
}
void dialogDepthMap1ChangedCallback(gint32 id, gpointer data) {
DepthMerge *dm = (DepthMerge *)data;
if (dm->depthMap1Drawable != NULL)
gimp_drawable_detach(dm->depthMap1Drawable);
dm->params.depthMap1 = id;
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);
}
void dialogDepthMap2ChangedCallback(gint32 id, gpointer data) {
DepthMerge *dm = (DepthMerge *)data;
if (dm->depthMap2Drawable != NULL)
gimp_drawable_detach(dm->depthMap2Drawable);
dm->params.depthMap2 = id;
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);
}
void dialogValueScaleUpdateCallback(GtkAdjustment *adjustment, gpointer data) {
DepthMergeValueEdit *valueEdit = (DepthMergeValueEdit *)data;
char buf[256];
if (*(valueEdit->value) != adjustment->value) {
*(valueEdit->value) = adjustment->value;
sprintf(buf, "%0.3f", (float)(adjustment->value));
gtk_signal_handler_block_by_data(GTK_OBJECT(valueEdit->entry), data);
gtk_entry_set_text(GTK_ENTRY(valueEdit->entry), buf);
gtk_signal_handler_unblock_by_data(GTK_OBJECT(valueEdit->entry), data);
DepthMerge_updatePreview(valueEdit->dm);
}
}
void dialogValueEntryUpdateCallback(GtkWidget *widget, gpointer data) {
DepthMergeValueEdit *valueEdit = (DepthMergeValueEdit *)data;
float newValue;
newValue = atof(gtk_entry_get_text(GTK_ENTRY(widget)));
if ((*(valueEdit->value) != newValue) &&
(newValue >= valueEdit->min) &&
(newValue <= valueEdit->max)) {
valueEdit->scaleData->value = newValue;
gtk_signal_emit_by_name(GTK_OBJECT(valueEdit->scaleData),
"value_changed");
DepthMerge_updatePreview(valueEdit->dm);
}
}
/* ----- Utility routines ----- */
void util_fillReducedBuffer(guchar *dest, gint destWidth, gint destHeight,
gint destBPP, gint destHasAlpha,
GDrawable *sourceDrawable,
gint x0, gint y0,
gint sourceWidth, gint sourceHeight) {
GPixelRgn rgn;
guchar *sourceBuffer, *reducedRowBuffer,
*sourceBufferRow, *sourceBufferPos, *reducedRowBufferPos;
int x, y, i, yPrime, sourceHasAlpha, sourceBpp;
int *sourceRowOffsetLookup;
if ((sourceDrawable == NULL) || (sourceWidth == 0) || (sourceHeight == 0)) {
for (x = 0; x < destWidth*destHeight*destBPP; x++)
dest[x] = 0;
return;
}
sourceBpp = sourceDrawable->bpp;
sourceBuffer = (guchar *)g_malloc(sourceWidth * sourceHeight *
sourceBpp);
reducedRowBuffer = (guchar *)g_malloc(destWidth * sourceBpp);
sourceRowOffsetLookup = (int *)g_malloc(destWidth * sizeof(int));
gimp_pixel_rgn_init(&rgn, sourceDrawable, x0, y0, sourceWidth, sourceHeight,
FALSE, FALSE);
sourceHasAlpha = gimp_drawable_has_alpha(sourceDrawable->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 */
void util_convertColorspace(guchar *dest,
gint destBPP, gint destHasAlpha,
guchar *source,
gint sourceBPP, gint sourceHasAlpha,
gint length) {
int i, j, sourcePos, destPos, accum;
int sourceColorBPP = sourceHasAlpha ? (sourceBPP-1) : sourceBPP;
int destColorBPP = destHasAlpha ? (destBPP -1) : destBPP;
if (((sourceColorBPP != 1) && (sourceColorBPP != 3)) ||
((destColorBPP != 1) && (destColorBPP != 3)))
fprintf(stderr, _("Warning: I don't _like_ this color space. This is a suggestion, not a threat.\n"));
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) {
for (i = 0; i < length; i++)
dest[destPos] = source[sourcePos];
}
} else {
for (i = 0, destPos = destColorBPP; i < length; i++, destPos += destBPP) {
dest[destPos] = 255;
}
}
}
}
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