blender-archive/source/blender/editors/space_image/image_ops.c

/**
 * $Id$
 *
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * Contributor(s): Blender Foundation, 2002-2009, Xavier Thomas
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include <string.h>
#include <stdlib.h>

#include "MEM_guardedalloc.h"

#include "DNA_object_types.h"
#include "DNA_packedFile_types.h"
#include "DNA_scene_types.h"

#include "BKE_colortools.h"
#include "BKE_context.h"
#include "BKE_image.h"
#include "BKE_global.h"
#include "BKE_image.h"
#include "BKE_library.h"
#include "BKE_main.h"
#include "BKE_node.h"
#include "BKE_packedFile.h"
#include "BKE_report.h"
#include "BKE_screen.h"

#include "BLI_math.h"
#include "BLI_blenlib.h"

#include "IMB_imbuf.h"
#include "IMB_imbuf_types.h"

#include "RE_pipeline.h"

#include "RNA_access.h"
#include "RNA_define.h"
#include "RNA_enum_types.h"

#include "ED_image.h"
#include "ED_screen.h"
#include "ED_space_api.h"
#include "ED_uvedit.h"

#include "UI_interface.h"
#include "UI_resources.h"
#include "UI_view2d.h"

#include "WM_api.h"
#include "WM_types.h"

#include "image_intern.h"

/******************** view navigation utilities *********************/

static void sima_zoom_set(SpaceImage *sima, ARegion *ar, float zoom)
{
	float oldzoom= sima->zoom;
	int width, height;

	sima->zoom= zoom;

	if (sima->zoom > 0.1f && sima->zoom < 4.0f)
		return;

	/* check zoom limits */
	ED_space_image_size(sima, &width, &height);

	width *= sima->zoom;
	height *= sima->zoom;

	if((width < 4) && (height < 4))
		sima->zoom= oldzoom;
	else if((ar->winrct.xmax - ar->winrct.xmin) <= sima->zoom)
		sima->zoom= oldzoom;
	else if((ar->winrct.ymax - ar->winrct.ymin) <= sima->zoom)
		sima->zoom= oldzoom;
}

static void sima_zoom_set_factor(SpaceImage *sima, ARegion *ar, float zoomfac)
{
	sima_zoom_set(sima, ar, sima->zoom*zoomfac);
}

#if 0 // currently unused
static int image_poll(bContext *C)
{
	return (CTX_data_edit_image(C) != NULL);
}
#endif

static int space_image_buffer_exists_poll(bContext *C)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	if(sima && sima->spacetype==SPACE_IMAGE)
		if(ED_space_image_has_buffer(sima))
			return 1;
	return 0;
}

static int space_image_file_exists_poll(bContext *C)
{
	if(space_image_buffer_exists_poll(C)) {
		SpaceImage *sima= CTX_wm_space_image(C);
		ImBuf *ibuf;
		void *lock;
		int poll;
		
		ibuf= ED_space_image_acquire_buffer(sima, &lock);
		poll= (ibuf && BLI_exists(ibuf->name) && BLI_is_writable(ibuf->name));
		ED_space_image_release_buffer(sima, lock);

		return poll;
	}
	return 0;
}

static int space_image_poll(bContext *C)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	if(sima && sima->spacetype==SPACE_IMAGE && sima->image)
		return 1;
	return 0;
}

int space_image_main_area_poll(bContext *C)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	// XXX ARegion *ar= CTX_wm_region(C);

	if(sima)
		return 1; // XXX (ar && ar->type->regionid == RGN_TYPE_WINDOW);
	
	return 0;
}

/********************** view pan operator *********************/

typedef struct ViewPanData {
	float x, y;
	float xof, yof;
} ViewPanData;

static void view_pan_init(bContext *C, wmOperator *op, wmEvent *event)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	ViewPanData *vpd;

	op->customdata= vpd= MEM_callocN(sizeof(ViewPanData), "ImageViewPanData");
	WM_cursor_modal(CTX_wm_window(C), BC_NSEW_SCROLLCURSOR);

	vpd->x= event->x;
	vpd->y= event->y;
	vpd->xof= sima->xof;
	vpd->yof= sima->yof;

	WM_event_add_modal_handler(C, op);
}

static void view_pan_exit(bContext *C, wmOperator *op, int cancel)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	ViewPanData *vpd= op->customdata;

	if(cancel) {
		sima->xof= vpd->xof;
		sima->yof= vpd->yof;
		ED_region_tag_redraw(CTX_wm_region(C));
	}

	WM_cursor_restore(CTX_wm_window(C));
	MEM_freeN(op->customdata);
}

static int view_pan_exec(bContext *C, wmOperator *op)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	float offset[2];

	RNA_float_get_array(op->ptr, "offset", offset);
	sima->xof += offset[0];
	sima->yof += offset[1];

	ED_region_tag_redraw(CTX_wm_region(C));

	/* XXX notifier? */
#if 0
	if(image_preview_active(curarea, NULL, NULL)) {
		/* recalculates new preview rect */
		scrarea_do_windraw(curarea);
		image_preview_event(2);
	}
#endif
	
	return OPERATOR_FINISHED;
}

static int view_pan_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	if (event->type == MOUSEPAN) {
		SpaceImage *sima= CTX_wm_space_image(C);
		float offset[2];
		
		offset[0]= (event->x - event->prevx)/sima->zoom;
		offset[1]= (event->y - event->prevy)/sima->zoom;
		RNA_float_set_array(op->ptr, "offset", offset);

		view_pan_exec(C, op);
		return OPERATOR_FINISHED;
	}
	else {
		view_pan_init(C, op, event);
		return OPERATOR_RUNNING_MODAL;
	}
}

static int view_pan_modal(bContext *C, wmOperator *op, wmEvent *event)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	ViewPanData *vpd= op->customdata;
	float offset[2];

	switch(event->type) {
		case MOUSEMOVE:
			sima->xof= vpd->xof;
			sima->yof= vpd->yof;
			offset[0]= (vpd->x - event->x)/sima->zoom;
			offset[1]= (vpd->y - event->y)/sima->zoom;
			RNA_float_set_array(op->ptr, "offset", offset);
			view_pan_exec(C, op);
			break;
		case MIDDLEMOUSE:
		case LEFTMOUSE:
			if(event->val==KM_RELEASE) {
				view_pan_exit(C, op, 0);
				return OPERATOR_FINISHED;
			}
			break;
	}

	return OPERATOR_RUNNING_MODAL;
}

static int view_pan_cancel(bContext *C, wmOperator *op)
{
	view_pan_exit(C, op, 1);
	return OPERATOR_CANCELLED;
}

void IMAGE_OT_view_pan(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "View Pan";
	ot->idname= "IMAGE_OT_view_pan";
	
	/* api callbacks */
	ot->exec= view_pan_exec;
	ot->invoke= view_pan_invoke;
	ot->modal= view_pan_modal;
	ot->cancel= view_pan_cancel;
	ot->poll= space_image_main_area_poll;

	/* flags */
	ot->flag= OPTYPE_BLOCKING;
	
	/* properties */
	RNA_def_float_vector(ot->srna, "offset", 2, NULL, -FLT_MAX, FLT_MAX,
		"Offset", "Offset in floating point units, 1.0 is the width and height of the image.", -FLT_MAX, FLT_MAX);
}

/********************** view zoom operator *********************/

typedef struct ViewZoomData {
	float x, y;
	float zoom;
} ViewZoomData;

static void view_zoom_init(bContext *C, wmOperator *op, wmEvent *event)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	ViewZoomData *vpd;

	op->customdata= vpd= MEM_callocN(sizeof(ViewZoomData), "ImageViewZoomData");
	WM_cursor_modal(CTX_wm_window(C), BC_NSEW_SCROLLCURSOR);

	vpd->x= event->x;
	vpd->y= event->y;
	vpd->zoom= sima->zoom;

	WM_event_add_modal_handler(C, op);
}

static void view_zoom_exit(bContext *C, wmOperator *op, int cancel)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	ViewZoomData *vpd= op->customdata;

	if(cancel) {
		sima->zoom= vpd->zoom;
		ED_region_tag_redraw(CTX_wm_region(C));
	}

	WM_cursor_restore(CTX_wm_window(C));
	MEM_freeN(op->customdata);
}

static int view_zoom_exec(bContext *C, wmOperator *op)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	ARegion *ar= CTX_wm_region(C);

	sima_zoom_set_factor(sima, ar, RNA_float_get(op->ptr, "factor"));

	ED_region_tag_redraw(CTX_wm_region(C));

	/* XXX notifier? */
#if 0
	if(image_preview_active(curarea, NULL, NULL)) {
		/* recalculates new preview rect */
		scrarea_do_windraw(curarea);
		image_preview_event(2);
	}
#endif
	
	return OPERATOR_FINISHED;
}

static int view_zoom_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	if (event->type == MOUSEZOOM) {
		SpaceImage *sima= CTX_wm_space_image(C);
		ARegion *ar= CTX_wm_region(C);
		float factor;
		
		factor= 1.0 + (event->x-event->prevx+event->y-event->prevy)/300.0f;
		RNA_float_set(op->ptr, "factor", factor);
		sima_zoom_set(sima, ar, sima->zoom*factor);
		ED_region_tag_redraw(CTX_wm_region(C));
		
		return OPERATOR_FINISHED;
	}
	else {
		view_zoom_init(C, op, event);
		return OPERATOR_RUNNING_MODAL;
	}
}

static int view_zoom_modal(bContext *C, wmOperator *op, wmEvent *event)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	ARegion *ar= CTX_wm_region(C);
	ViewZoomData *vpd= op->customdata;
	float factor;

	switch(event->type) {
		case MOUSEMOVE:
			factor= 1.0 + (vpd->x-event->x+vpd->y-event->y)/300.0f;
			RNA_float_set(op->ptr, "factor", factor);
			sima_zoom_set(sima, ar, vpd->zoom*factor);
			ED_region_tag_redraw(CTX_wm_region(C));
			break;
		case MIDDLEMOUSE:
		case LEFTMOUSE:
			if(event->val==KM_RELEASE) {
				view_zoom_exit(C, op, 0);
				return OPERATOR_FINISHED;
			}
			break;
	}

	return OPERATOR_RUNNING_MODAL;
}

static int view_zoom_cancel(bContext *C, wmOperator *op)
{
	view_zoom_exit(C, op, 1);
	return OPERATOR_CANCELLED;
}

void IMAGE_OT_view_zoom(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "View Zoom";
	ot->idname= "IMAGE_OT_view_zoom";
	
	/* api callbacks */
	ot->exec= view_zoom_exec;
	ot->invoke= view_zoom_invoke;
	ot->modal= view_zoom_modal;
	ot->cancel= view_zoom_cancel;
	ot->poll= space_image_main_area_poll;

	/* flags */
	ot->flag= OPTYPE_BLOCKING;
	
	/* properties */
	RNA_def_float(ot->srna, "factor", 0.0f, 0.0f, FLT_MAX,
		"Factor", "Zoom factor, values higher than 1.0 zoom in, lower values zoom out.", -FLT_MAX, FLT_MAX);
}

/********************** view all operator *********************/

/* Updates the fields of the View2D member of the SpaceImage struct.
 * Default behavior is to reset the position of the image and set the zoom to 1
 * If the image will not fit within the window rectangle, the zoom is adjusted */

static int view_all_exec(bContext *C, wmOperator *op)
{
	SpaceImage *sima;
	ARegion *ar;
	Scene *scene;
	Object *obedit;
	float aspx, aspy, zoomx, zoomy, w, h;
	int width, height;

	/* retrieve state */
	sima= CTX_wm_space_image(C);
	ar= CTX_wm_region(C);
	scene= (Scene*)CTX_data_scene(C);
	obedit= CTX_data_edit_object(C);

	ED_space_image_size(sima, &width, &height);
	ED_space_image_aspect(sima, &aspx, &aspy);

	w= width*aspx;
	h= height*aspy;
	
	/* check if the image will fit in the image with zoom==1 */
	width = ar->winrct.xmax - ar->winrct.xmin + 1;
	height = ar->winrct.ymax - ar->winrct.ymin + 1;

	if((w >= width || h >= height) && (width > 0 && height > 0)) {
		/* find the zoom value that will fit the image in the image space */
		zoomx= width/w;
		zoomy= height/h;
		sima_zoom_set(sima, ar, 1.0f/power_of_2(1/MIN2(zoomx, zoomy)));
	}
	else
		sima_zoom_set(sima, ar, 1.0f);

	sima->xof= sima->yof= 0.0f;

	ED_region_tag_redraw(CTX_wm_region(C));
	
	return OPERATOR_FINISHED;
}

void IMAGE_OT_view_all(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "View All";
	ot->idname= "IMAGE_OT_view_all";
	
	/* api callbacks */
	ot->exec= view_all_exec;
	ot->poll= space_image_main_area_poll;
}

/********************** view selected operator *********************/

static int view_selected_exec(bContext *C, wmOperator *op)
{
	SpaceImage *sima;
	ARegion *ar;
	Scene *scene;
	Object *obedit;
	Image *ima;
	float size, min[2], max[2], d[2];
	int width, height;

	/* retrieve state */
	sima= CTX_wm_space_image(C);
	ar= CTX_wm_region(C);
	scene= (Scene*)CTX_data_scene(C);
	obedit= CTX_data_edit_object(C);

	ima= ED_space_image(sima);
	ED_space_image_size(sima, &width, &height);

	/* get bounds */
	if(!ED_uvedit_minmax(scene, ima, obedit, min, max))
		return OPERATOR_CANCELLED;

	/* adjust offset and zoom */
	sima->xof= (int)(((min[0] + max[0])*0.5f - 0.5f)*width);
	sima->yof= (int)(((min[1] + max[1])*0.5f - 0.5f)*height);

	d[0]= max[0] - min[0];
	d[1]= max[1] - min[1];
	size= 0.5*MAX2(d[0], d[1])*MAX2(width, height)/256.0f;
	
	if(size<=0.01) size= 0.01;
	sima_zoom_set(sima, ar, 0.7/size);

	ED_region_tag_redraw(CTX_wm_region(C));
	
	return OPERATOR_FINISHED;
}

static int view_selected_poll(bContext *C)
{
	return (space_image_main_area_poll(C) && ED_operator_uvedit(C));
}

void IMAGE_OT_view_selected(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "View Center";
	ot->idname= "IMAGE_OT_view_selected";
	
	/* api callbacks */
	ot->exec= view_selected_exec;
	ot->poll= view_selected_poll;
}

/********************** view zoom in/out operator *********************/

static int view_zoom_in_exec(bContext *C, wmOperator *op)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	ARegion *ar= CTX_wm_region(C);

	sima_zoom_set_factor(sima, ar, 1.25f);

	ED_region_tag_redraw(CTX_wm_region(C));
	
	return OPERATOR_FINISHED;
}

void IMAGE_OT_view_zoom_in(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "View Zoom In";
	ot->idname= "IMAGE_OT_view_zoom_in";
	
	/* api callbacks */
	ot->exec= view_zoom_in_exec;
	ot->poll= space_image_main_area_poll;
}

static int view_zoom_out_exec(bContext *C, wmOperator *op)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	ARegion *ar= CTX_wm_region(C);

	sima_zoom_set_factor(sima, ar, 0.8f);

	ED_region_tag_redraw(CTX_wm_region(C));
	
	return OPERATOR_FINISHED;
}

void IMAGE_OT_view_zoom_out(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "View Zoom Out";
	ot->idname= "IMAGE_OT_view_zoom_out";
	
	/* api callbacks */
	ot->exec= view_zoom_out_exec;
	ot->poll= space_image_main_area_poll;
}

/********************** view zoom ratio operator *********************/

static int view_zoom_ratio_exec(bContext *C, wmOperator *op)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	ARegion *ar= CTX_wm_region(C);

	sima_zoom_set(sima, ar, RNA_float_get(op->ptr, "ratio"));
	
	/* ensure pixel exact locations for draw */
	sima->xof= (int)sima->xof;
	sima->yof= (int)sima->yof;

	/* XXX notifier? */
#if 0
	if(image_preview_active(curarea, NULL, NULL)) {
		/* recalculates new preview rect */
		scrarea_do_windraw(curarea);
		image_preview_event(2);
	}
#endif

	ED_region_tag_redraw(CTX_wm_region(C));
	
	return OPERATOR_FINISHED;
}

void IMAGE_OT_view_zoom_ratio(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "View Zoom Ratio";
	ot->idname= "IMAGE_OT_view_zoom_ratio";
	
	/* api callbacks */
	ot->exec= view_zoom_ratio_exec;
	ot->poll= space_image_main_area_poll;
	
	/* properties */
	RNA_def_float(ot->srna, "ratio", 0.0f, 0.0f, FLT_MAX,
		"Ratio", "Zoom ratio, 1.0 is 1:1, higher is zoomed in, lower is zoomed out.", -FLT_MAX, FLT_MAX);
}

/**************** load/replace/save callbacks ******************/

/* XXX make dynamic */
static const EnumPropertyItem image_file_type_items[] = {
		{R_TARGA, "TARGA", 0, "Targa", ""},
		{R_RAWTGA, "TARGA RAW", 0, "Targa Raw", ""},
		{R_PNG, "PNG", 0, "PNG", ""},
		{R_BMP, "BMP", 0, "BMP", ""},
		{R_JPEG90, "JPEG", 0, "Jpeg", ""},
#ifdef WITH_OPENJPEG
		{R_JP2, "JPEG_2000", 0, "Jpeg 2000", ""},
#endif
		{R_IRIS, "IRIS", 0, "Iris", ""},
#ifdef WITH_TIFF
		{R_TIFF, "TIFF", 0, "Tiff", ""},
#endif
		{R_RADHDR, "RADIANCE_HDR", 0, "Radiance HDR", ""},
		{R_CINEON, "CINEON", 0, "Cineon", ""},
		{R_DPX, "DPX", 0, "DPX", ""},
#ifdef WITH_OPENEXR
		{R_OPENEXR, "OPENEXR", 0, "OpenEXR", ""},
	/* saving sequences of multilayer won't work, they copy buffers  */
	/*if(ima->source==IMA_SRC_SEQUENCE && ima->type==IMA_TYPE_MULTILAYER);
	else*/
		{R_MULTILAYER, "MULTILAYER", 0, "MultiLayer", ""},
#endif	
		{0, NULL, 0, NULL, NULL}};

static void image_filesel(bContext *C, wmOperator *op, const char *path)
{
	RNA_string_set(op->ptr, "path", path);
	WM_event_add_fileselect(C, op); 
}

/******************** open image operator ********************/

static void open_init(bContext *C, wmOperator *op)
{
	PropertyPointerRNA *pprop;

	op->customdata= pprop= MEM_callocN(sizeof(PropertyPointerRNA), "OpenPropertyPointerRNA");
	uiIDContextProperty(C, &pprop->ptr, &pprop->prop);
}

static int open_cancel(bContext *C, wmOperator *op)
{
	MEM_freeN(op->customdata);
	op->customdata= NULL;
	return OPERATOR_CANCELLED;
}

static int open_exec(bContext *C, wmOperator *op)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	Scene *scene= CTX_data_scene(C);
	Object *obedit= CTX_data_edit_object(C);
	PropertyPointerRNA *pprop;
	PointerRNA idptr;
	Image *ima= NULL;
	char str[FILE_MAX];

	RNA_string_get(op->ptr, "path", str);
	/* default to frame 1 if there's no scene in context */
	ima= BKE_add_image_file(str, scene ? scene->r.cfra : 1);

	if(!ima) {
		if(op->customdata) MEM_freeN(op->customdata);
		return OPERATOR_CANCELLED;
	}
	
	if(!op->customdata)
		open_init(C, op);

	/* hook into UI */
	pprop= op->customdata;

	if(pprop->prop) {
		/* when creating new ID blocks, use is already 1, but RNA
		 * pointer se also increases user, so this compensates it */
		ima->id.us--;

		RNA_id_pointer_create(&ima->id, &idptr);
		RNA_property_pointer_set(&pprop->ptr, pprop->prop, idptr);
		RNA_property_update(C, &pprop->ptr, pprop->prop);
	}
	else if(sima)
		ED_space_image_set(C, sima, scene, obedit, ima);

	// XXX other users?
	BKE_image_signal(ima, (sima)? &sima->iuser: NULL, IMA_SIGNAL_RELOAD);
	WM_event_add_notifier(C, NC_IMAGE|NA_EDITED, ima);
	
	MEM_freeN(op->customdata);

	return OPERATOR_FINISHED;
}

static int open_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	char *path= (sima && sima->image)? sima->image->name: U.textudir;

	if(!RNA_property_is_set(op->ptr, "relative_path"))
		RNA_boolean_set(op->ptr, "relative_path", U.flag & USER_RELPATHS);

	if(RNA_property_is_set(op->ptr, "path"))
		return open_exec(C, op);
	
	open_init(C, op);

	image_filesel(C, op, path);

	return OPERATOR_RUNNING_MODAL;
}

void IMAGE_OT_open(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Open";
	ot->idname= "IMAGE_OT_open";
	
	/* api callbacks */
	ot->exec= open_exec;
	ot->invoke= open_invoke;
	ot->cancel= open_cancel;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

	/* properties */
	WM_operator_properties_filesel(ot, FOLDERFILE|IMAGEFILE|MOVIEFILE, FILE_SPECIAL, FILE_OPENFILE);

	RNA_def_boolean(ot->srna, "relative_path", 0, "Relative Path", "Load image with relative path to current .blend file");
}

/******************** replace image operator ********************/

static int replace_exec(bContext *C, wmOperator *op)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	char str[FILE_MAX];

	if(!sima->image)
		return OPERATOR_CANCELLED;
	
	RNA_string_get(op->ptr, "path", str);
	BLI_strncpy(sima->image->name, str, sizeof(sima->image->name)-1); /* we cant do much if the str is longer then 240 :/ */

	BKE_image_signal(sima->image, &sima->iuser, IMA_SIGNAL_RELOAD);
	WM_event_add_notifier(C, NC_IMAGE|NA_EDITED, sima->image);

	return OPERATOR_FINISHED;
}

static int replace_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	char *path= (sima->image)? sima->image->name: U.textudir;

	if(!sima->image)
		return OPERATOR_CANCELLED;

	if(RNA_property_is_set(op->ptr, "path"))
		return replace_exec(C, op);

	image_filesel(C, op, path);

	return OPERATOR_RUNNING_MODAL;
}

void IMAGE_OT_replace(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Replace";
	ot->idname= "IMAGE_OT_replace";
	
	/* api callbacks */
	ot->exec= replace_exec;
	ot->invoke= replace_invoke;
	ot->poll= space_image_poll;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

	/* properties */
	WM_operator_properties_filesel(ot, FOLDERFILE|IMAGEFILE|MOVIEFILE, FILE_SPECIAL, FILE_OPENFILE);
}

/******************** save image as operator ********************/

/* assumes name is FILE_MAX */
/* ima->name and ibuf->name should end up the same */
static void save_image_doit(bContext *C, SpaceImage *sima, Scene *scene, wmOperator *op, char *path)
{
	Image *ima= ED_space_image(sima);
	void *lock;
	ImBuf *ibuf= ED_space_image_acquire_buffer(sima, &lock);

	if (ibuf) {
		int relative= RNA_boolean_get(op->ptr, "relative_path");
		int save_copy= (RNA_struct_find_property(op->ptr, "copy") && RNA_boolean_get(op->ptr, "copy"));

		BLI_path_abs(path, G.sce);
		
		if(scene->r.scemode & R_EXTENSION)  {
			BKE_add_image_extension(path, sima->imtypenr);
		}
		
		/* enforce user setting for RGB or RGBA, but skip BW */
		if(scene->r.planes==32)
			ibuf->depth= 32;
		else if(scene->r.planes==24)
			ibuf->depth= 24;
		
		WM_cursor_wait(1);

		if(sima->imtypenr==R_MULTILAYER) {
			RenderResult *rr= BKE_image_acquire_renderresult(scene, ima);
			if(rr) {
				RE_WriteRenderResult(rr, path, scene->r.quality);

				if(relative)
					BLI_path_rel(path, G.sce); /* only after saving */

				if(!save_copy) {
					BLI_strncpy(ima->name, path, sizeof(ima->name));
					BLI_strncpy(ibuf->name, path, sizeof(ibuf->name));

					/* should be function? nevertheless, saving only happens here */
					for(ibuf= ima->ibufs.first; ibuf; ibuf= ibuf->next)
						ibuf->userflags &= ~IB_BITMAPDIRTY;
				}
			}
			else
				BKE_report(op->reports, RPT_ERROR, "Did not write, no Multilayer Image");
			BKE_image_release_renderresult(scene, ima);
		}
		else if (BKE_write_ibuf(scene, ibuf, path, sima->imtypenr, scene->r.subimtype, scene->r.quality)) {
			char *name;

			if(relative)
				BLI_path_rel(path, G.sce); /* only after saving */

			if(!save_copy) {

				BLI_strncpy(ima->name, path, sizeof(ima->name));
				BLI_strncpy(ibuf->name, path, sizeof(ibuf->name));

				ibuf->userflags &= ~IB_BITMAPDIRTY;

				/* change type? */
				if(ima->type==IMA_TYPE_R_RESULT) {
					ima->type= IMA_TYPE_IMAGE;

					/* workaround to ensure the render result buffer is no longer used
					 * by this image, otherwise can crash when a new render result is
					 * created. */
					if(ibuf->rect && !(ibuf->mall & IB_rect))
						imb_freerectImBuf(ibuf);
					if(ibuf->rect_float && !(ibuf->mall & IB_rectfloat))
						imb_freerectfloatImBuf(ibuf);
					if(ibuf->zbuf && !(ibuf->mall & IB_zbuf))
						IMB_freezbufImBuf(ibuf);
					if(ibuf->zbuf_float && !(ibuf->mall & IB_zbuffloat))
						IMB_freezbuffloatImBuf(ibuf);
				}
				if( ELEM(ima->source, IMA_SRC_GENERATED, IMA_SRC_VIEWER)) {
					ima->source= IMA_SRC_FILE;
					ima->type= IMA_TYPE_IMAGE;
				}

				name = BLI_last_slash(path);

				/* name image as how we saved it */
				rename_id(&ima->id, name ? name + 1 : path);
			}
		} 
		else
			BKE_reportf(op->reports, RPT_ERROR, "Couldn't write image: %s", path);

		WM_event_add_notifier(C, NC_IMAGE|NA_EDITED, sima->image);

		WM_cursor_wait(0);
	}

	ED_space_image_release_buffer(sima, lock);
}

static int save_as_exec(bContext *C, wmOperator *op)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	Scene *scene= CTX_data_scene(C);
	Image *ima = ED_space_image(sima);
	char str[FILE_MAX];

	if(!ima)
		return OPERATOR_CANCELLED;

	sima->imtypenr= RNA_enum_get(op->ptr, "file_type");
	RNA_string_get(op->ptr, "path", str);

	save_image_doit(C, sima, scene, op, str);

	return OPERATOR_FINISHED;
}

static int save_as_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	Image *ima = ED_space_image(sima);
	Scene *scene= CTX_data_scene(C);
	ImBuf *ibuf;
	void *lock;

	if(!RNA_property_is_set(op->ptr, "relative_path"))
		RNA_boolean_set(op->ptr, "relative_path", U.flag & USER_RELPATHS);

	if(RNA_property_is_set(op->ptr, "path"))
		return save_as_exec(C, op);
	
	if(!ima)
		return OPERATOR_CANCELLED;

	/* always opens fileselect */
	ibuf= ED_space_image_acquire_buffer(sima, &lock);

	if(ibuf) {
		/* cant save multilayer sequence, ima->rr isn't valid for a specific frame */
		if(ima->rr && !(ima->source==IMA_SRC_SEQUENCE && ima->type==IMA_TYPE_MULTILAYER))
			sima->imtypenr= R_MULTILAYER;
		else if(ima->type==IMA_TYPE_R_RESULT)
			sima->imtypenr= scene->r.imtype;
		else if (ima->source == IMA_SRC_GENERATED)
			sima->imtypenr= R_PNG;
		else
			sima->imtypenr= BKE_ftype_to_imtype(ibuf->ftype);

		RNA_enum_set(op->ptr, "file_type", sima->imtypenr);
		
		if(ibuf->name[0]==0)
			BLI_strncpy(ibuf->name, G.ima, FILE_MAX);

		/* enable save_copy by default for render results */
		if(ELEM(ima->type, IMA_TYPE_R_RESULT, IMA_TYPE_COMPOSITE) && !RNA_property_is_set(op->ptr, "copy")) {
			RNA_boolean_set(op->ptr, "copy", TRUE);
		}

		// XXX note: we can give default menu enums to operator for this 
		image_filesel(C, op, ibuf->name);

		ED_space_image_release_buffer(sima, lock);
		
		return OPERATOR_RUNNING_MODAL;
	}

	ED_space_image_release_buffer(sima, lock);

	return OPERATOR_CANCELLED;
}

void IMAGE_OT_save_as(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Save As";
	ot->idname= "IMAGE_OT_save_as";
	
	/* api callbacks */
	ot->exec= save_as_exec;
	ot->invoke= save_as_invoke;
	ot->poll= space_image_buffer_exists_poll;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

	/* properties */
	RNA_def_enum(ot->srna, "file_type", image_file_type_items, R_PNG, "File Type", "File type to save image as.");
	WM_operator_properties_filesel(ot, FOLDERFILE|IMAGEFILE|MOVIEFILE, FILE_SPECIAL, FILE_SAVE);

	RNA_def_boolean(ot->srna, "relative_path", 0, "Relative Path", "Save image with relative path to current .blend file");
	RNA_def_boolean(ot->srna, "copy", 0, "Copy", "Create a new image file without modifying the current image in blender");
}

/******************** save image operator ********************/

static int save_exec(bContext *C, wmOperator *op)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	Image *ima = ED_space_image(sima);
	void *lock;
	ImBuf *ibuf= ED_space_image_acquire_buffer(sima, &lock);
	Scene *scene= CTX_data_scene(C);
	RenderResult *rr;
	char name[FILE_MAX];

	if(!ima || !ibuf) {
		ED_space_image_release_buffer(sima, lock);
		return OPERATOR_CANCELLED;
	}

	/* if exists, saves over without fileselect */
	
	BLI_strncpy(name, ibuf->name, FILE_MAX);
	if(name[0]==0)
		BLI_strncpy(name, G.ima, FILE_MAX);
	
	if(BLI_exists(name) && BLI_is_writable(name)) {
		rr= BKE_image_acquire_renderresult(scene, ima);

		if(rr)
			sima->imtypenr= R_MULTILAYER;
		else 
			sima->imtypenr= BKE_ftype_to_imtype(ibuf->ftype);

		BKE_image_release_renderresult(scene, ima);
		ED_space_image_release_buffer(sima, lock);
		
		save_image_doit(C, sima, scene, op, name);
	}
	else {
		ED_space_image_release_buffer(sima, lock);

		BKE_report(op->reports, RPT_ERROR, "Can not save image.");
		return OPERATOR_CANCELLED;
	}

	return OPERATOR_FINISHED;
}

void IMAGE_OT_save(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Save";
	ot->idname= "IMAGE_OT_save";
	
	/* api callbacks */
	ot->exec= save_exec;
	ot->poll= space_image_file_exists_poll;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/******************* save sequence operator ********************/

static int save_sequence_exec(bContext *C, wmOperator *op)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	ImBuf *ibuf;
	int tot= 0;
	char di[FILE_MAX], fi[FILE_MAX];
	
	if(sima->image==NULL)
		return OPERATOR_CANCELLED;

	if(sima->image->source!=IMA_SRC_SEQUENCE) {
		BKE_report(op->reports, RPT_ERROR, "Can only save sequence on image sequences.");
		return OPERATOR_CANCELLED;
	}

	if(sima->image->type==IMA_TYPE_MULTILAYER) {
		BKE_report(op->reports, RPT_ERROR, "Can't save multilayer sequences.");
		return OPERATOR_CANCELLED;
	}
	
	/* get total */
	for(ibuf= sima->image->ibufs.first; ibuf; ibuf= ibuf->next) 
		if(ibuf->userflags & IB_BITMAPDIRTY)
			tot++;
	
	if(tot==0) {
		BKE_report(op->reports, RPT_WARNING, "No images have been changed.");
		return OPERATOR_CANCELLED;
	}

	/* get a filename for menu */
	for(ibuf= sima->image->ibufs.first; ibuf; ibuf= ibuf->next) 
		if(ibuf->userflags & IB_BITMAPDIRTY)
			break;
	
	BLI_strncpy(di, ibuf->name, FILE_MAX);
	BLI_splitdirstring(di, fi);
	
	BKE_reportf(op->reports, RPT_INFO, "%d Image(s) will be saved in %s", tot, di);

	for(ibuf= sima->image->ibufs.first; ibuf; ibuf= ibuf->next) {
		if(ibuf->userflags & IB_BITMAPDIRTY) {
			char name[FILE_MAX];
			BLI_strncpy(name, ibuf->name, sizeof(name));
			
			BLI_path_abs(name, G.sce);

			if(0 == IMB_saveiff(ibuf, name, IB_rect | IB_zbuf | IB_zbuffloat)) {
				BKE_reportf(op->reports, RPT_ERROR, "Could not write image %s.", name);
				break;
			}

			BKE_reportf(op->reports, RPT_INFO, "Saved: %s\n", ibuf->name);
			ibuf->userflags &= ~IB_BITMAPDIRTY;
		}
	}

	return OPERATOR_FINISHED;
}

void IMAGE_OT_save_sequence(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Save Sequence";
	ot->idname= "IMAGE_OT_save_sequence";
	
	/* api callbacks */
	ot->exec= save_sequence_exec;
	ot->poll= space_image_buffer_exists_poll;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/******************** reload image operator ********************/

static int reload_exec(bContext *C, wmOperator *op)
{
	Image *ima= CTX_data_edit_image(C);
	SpaceImage *sima= CTX_wm_space_image(C);

	if(!ima)
		return OPERATOR_CANCELLED;

	// XXX other users?
	BKE_image_signal(ima, (sima)? &sima->iuser: NULL, IMA_SIGNAL_RELOAD);

	WM_event_add_notifier(C, NC_IMAGE|NA_EDITED, ima);
	
	return OPERATOR_FINISHED;
}

void IMAGE_OT_reload(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Reload";
	ot->idname= "IMAGE_OT_reload";
	
	/* api callbacks */
	ot->exec= reload_exec;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/********************** new image operator *********************/

static int new_exec(bContext *C, wmOperator *op)
{
	SpaceImage *sima;
	Scene *scene;
	Object *obedit;
	Image *ima;
	PointerRNA ptr, idptr;
	PropertyRNA *prop;
	char name[22];
	float color[4];
	int width, height, floatbuf, uvtestgrid;

	/* retrieve state */
	sima= CTX_wm_space_image(C);
	scene= (Scene*)CTX_data_scene(C);
	obedit= CTX_data_edit_object(C);

	RNA_string_get(op->ptr, "name", name);
	width= RNA_int_get(op->ptr, "width");
	height= RNA_int_get(op->ptr, "height");
	floatbuf= RNA_boolean_get(op->ptr, "float");
	uvtestgrid= RNA_boolean_get(op->ptr, "uv_test_grid");
	RNA_float_get_array(op->ptr, "color", color);
	color[3]= RNA_float_get(op->ptr, "alpha");
	
	if (!floatbuf && scene->r.color_mgt_flag & R_COLOR_MANAGEMENT)
		linearrgb_to_srgb_v3_v3(color, color);

	ima = BKE_add_image_size(width, height, name, floatbuf, uvtestgrid, color);

	if(!ima)
		return OPERATOR_CANCELLED;

	/* hook into UI */
	uiIDContextProperty(C, &ptr, &prop);

	if(prop) {
		/* when creating new ID blocks, use is already 1, but RNA
		 * pointer se also increases user, so this compensates it */
		ima->id.us--;

		RNA_id_pointer_create(&ima->id, &idptr);
		RNA_property_pointer_set(&ptr, prop, idptr);
		RNA_property_update(C, &ptr, prop);
	}
	else if(sima)
		ED_space_image_set(C, sima, scene, obedit, ima);

	// XXX other users?
	BKE_image_signal(ima, (sima)? &sima->iuser: NULL, IMA_SIGNAL_USER_NEW_IMAGE);
	
	return OPERATOR_FINISHED;
}

void IMAGE_OT_new(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "New";
	ot->idname= "IMAGE_OT_new";
	
	/* api callbacks */
	ot->exec= new_exec;
	ot->invoke= WM_operator_props_popup;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

	/* properties */
	RNA_def_string(ot->srna, "name", "Untitled", 21, "Name", "Image datablock name.");
	RNA_def_int(ot->srna, "width", 1024, 1, INT_MAX, "Width", "Image width.", 1, 16384);
	RNA_def_int(ot->srna, "height", 1024, 1, INT_MAX, "Height", "Image height.", 1, 16384);
	RNA_def_float_color(ot->srna, "color", 3, NULL, 0.0f, FLT_MAX, "Color", "Default fill color.", 0.0f, 1.0f);
	RNA_def_float(ot->srna, "alpha", 1.0f, 0.0f, 1.0f, "Alpha", "Default fill alpha.", 0.0f, 1.0f);
	RNA_def_boolean(ot->srna, "uv_test_grid", 0, "UV Test Grid", "Fill the image with a grid for UV map testing.");
	RNA_def_boolean(ot->srna, "float", 0, "32 bit Float", "Create image with 32 bit floating point bit depth.");
}

/********************* pack operator *********************/

static int pack_test(bContext *C, wmOperator *op)
{
	Image *ima= CTX_data_edit_image(C);
	int as_png= RNA_boolean_get(op->ptr, "as_png");

	if(!ima)
		return 0;
	if(!as_png && ima->packedfile)
		return 0;

	if(ima->source==IMA_SRC_SEQUENCE || ima->source==IMA_SRC_MOVIE) {
		BKE_report(op->reports, RPT_ERROR, "Can't pack movie or image sequence.");
		return 0;
	}

	return 1;
}

static int pack_exec(bContext *C, wmOperator *op)
{
	Image *ima= CTX_data_edit_image(C);
	ImBuf *ibuf= BKE_image_get_ibuf(ima, NULL);
	int as_png= RNA_boolean_get(op->ptr, "as_png");

	if(!pack_test(C, op))
		return OPERATOR_CANCELLED;
	
	if(!as_png && (ibuf && (ibuf->userflags & IB_BITMAPDIRTY))) {
		BKE_report(op->reports, RPT_ERROR, "Can't pack edited image from disk, only as internal PNG.");
		return OPERATOR_CANCELLED;
	}

	if(as_png)
		BKE_image_memorypack(ima);
	else
		ima->packedfile= newPackedFile(op->reports, ima->name);

	return OPERATOR_FINISHED;
}

static int pack_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	Image *ima= CTX_data_edit_image(C);
	ImBuf *ibuf= BKE_image_get_ibuf(ima, NULL);
	uiPopupMenu *pup;
	uiLayout *layout;
	int as_png= RNA_boolean_get(op->ptr, "as_png");

	if(!pack_test(C, op))
		return OPERATOR_CANCELLED;
	
	if(!as_png && (ibuf && (ibuf->userflags & IB_BITMAPDIRTY))) {
		pup= uiPupMenuBegin(C, "OK", ICON_QUESTION);
		layout= uiPupMenuLayout(pup);
		uiItemBooleanO(layout, "Can't pack edited image from disk. Pack as internal PNG?", 0, op->idname, "as_png", 1);
		uiPupMenuEnd(C, pup);

		return OPERATOR_CANCELLED;
	}

	return pack_exec(C, op);
}

void IMAGE_OT_pack(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Pack";
	ot->idname= "IMAGE_OT_pack";
	
	/* api callbacks */
	ot->exec= pack_exec;
	ot->invoke= pack_invoke;
	ot->poll= space_image_buffer_exists_poll;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

	/* properties */
	RNA_def_boolean(ot->srna, "as_png", 0, "Pack As PNG", "Pack image as lossless PNG.");
}

/********************* unpack operator *********************/

void unpack_menu(bContext *C, char *opname, char *abs_name, char *folder, PackedFile *pf)
{
	uiPopupMenu *pup;
	uiLayout *layout;
	char line[FILE_MAXDIR + FILE_MAXFILE + 100];
	char local_name[FILE_MAXDIR + FILE_MAX], fi[FILE_MAX];
	
	strcpy(local_name, abs_name);
	BLI_splitdirstring(local_name, fi);
	sprintf(local_name, "//%s/%s", folder, fi);

	pup= uiPupMenuBegin(C, "Unpack file", 0);
	layout= uiPupMenuLayout(pup);

	uiItemEnumO(layout, opname, "Remove Pack", 0, "method", PF_REMOVE);

	if(strcmp(abs_name, local_name)) {
		switch(checkPackedFile(local_name, pf)) {
			case PF_NOFILE:
				sprintf(line, "Create %s", local_name);
				uiItemEnumO(layout, opname, line, 0, "method", PF_WRITE_LOCAL);
				break;
			case PF_EQUAL:
				sprintf(line, "Use %s (identical)", local_name);
				uiItemEnumO(layout, opname, line, 0, "method", PF_USE_LOCAL);
				break;
			case PF_DIFFERS:
				sprintf(line, "Use %s (differs)", local_name);
				uiItemEnumO(layout, opname, line, 0, "method", PF_USE_LOCAL);
				sprintf(line, "Overwrite %s", local_name);
				uiItemEnumO(layout, opname, line, 0, "method", PF_WRITE_LOCAL);
				break;
		}
	}
	
	switch(checkPackedFile(abs_name, pf)) {
		case PF_NOFILE:
			sprintf(line, "Create %s", abs_name);
			uiItemEnumO(layout, opname, line, 0, "method", PF_WRITE_ORIGINAL);
			break;
		case PF_EQUAL:
			sprintf(line, "Use %s (identical)", abs_name);
			uiItemEnumO(layout, opname, line, 0, "method", PF_USE_ORIGINAL);
			break;
		case PF_DIFFERS:
			sprintf(line, "Use %s (differs)", local_name);
			uiItemEnumO(layout, opname, line, 0, "method", PF_USE_ORIGINAL);
			sprintf(line, "Overwrite %s", local_name);
			uiItemEnumO(layout, opname, line, 0, "method", PF_WRITE_ORIGINAL);
			break;
	}

	uiPupMenuEnd(C, pup);
}

static int unpack_exec(bContext *C, wmOperator *op)
{
	Image *ima= CTX_data_edit_image(C);
	int method= RNA_enum_get(op->ptr, "method");

	if(!ima || !ima->packedfile)
		return OPERATOR_CANCELLED;

	if(ima->source==IMA_SRC_SEQUENCE || ima->source==IMA_SRC_MOVIE) {
		BKE_report(op->reports, RPT_ERROR, "Can't unpack movie or image sequence.");
		return OPERATOR_CANCELLED;
	}

	if(G.fileflags & G_AUTOPACK)
		BKE_report(op->reports, RPT_WARNING, "AutoPack is enabled, so image will be packed again on file save.");
	
	unpackImage(op->reports, ima, method);

	return OPERATOR_FINISHED;
}

static int unpack_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	Image *ima= CTX_data_edit_image(C);

	if(!ima || !ima->packedfile)
		return OPERATOR_CANCELLED;

	if(ima->source==IMA_SRC_SEQUENCE || ima->source==IMA_SRC_MOVIE) {
		BKE_report(op->reports, RPT_ERROR, "Can't unpack movie or image sequence.");
		return OPERATOR_CANCELLED;
	}

	if(G.fileflags & G_AUTOPACK)
		BKE_report(op->reports, RPT_WARNING, "AutoPack is enabled, so image will be packed again on file save.");
	
	unpack_menu(C, "IMAGE_OT_unpack", ima->name, "textures", ima->packedfile);

	return OPERATOR_FINISHED;
}

void IMAGE_OT_unpack(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Unpack";
	ot->idname= "IMAGE_OT_unpack";
	
	/* api callbacks */
	ot->exec= unpack_exec;
	ot->invoke= unpack_invoke;
	ot->poll= space_image_buffer_exists_poll;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

	/* properties */
	RNA_def_enum(ot->srna, "method", unpack_method_items, PF_USE_LOCAL, "Method", "How to unpack.");
}

/******************** sample image operator ********************/

typedef struct ImageSampleInfo {
	ARegionType *art;
	void *draw_handle;
	int x, y;
	int channels;

	char col[4];
	float colf[4];
	int z;
	float zf;

	char *colp;
	float *colfp;
	int *zp;
	float *zfp;

	int draw;
} ImageSampleInfo;

static void sample_draw(const bContext *C, ARegion *ar, void *arg_info)
{
	ImageSampleInfo *info= arg_info;

	draw_image_info(ar, info->channels, info->x, info->y, info->colp,
		info->colfp, info->zp, info->zfp);
}

static void sample_apply(bContext *C, wmOperator *op, wmEvent *event)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	ARegion *ar= CTX_wm_region(C);
	void *lock;
	ImBuf *ibuf= ED_space_image_acquire_buffer(sima, &lock);
	ImageSampleInfo *info= op->customdata;
	float fx, fy;
	int x, y;
	
	if(ibuf == NULL) {
		ED_space_image_release_buffer(sima, lock);
		return;
	}

	x= event->x - ar->winrct.xmin;
	y= event->y - ar->winrct.ymin;
	UI_view2d_region_to_view(&ar->v2d, x, y, &fx, &fy);

	if(fx>=0.0 && fy>=0.0 && fx<1.0 && fy<1.0) {
		float *fp;
		char *cp;
		int x= (int)(fx*ibuf->x), y= (int)(fy*ibuf->y);

		CLAMP(x, 0, ibuf->x-1);
		CLAMP(y, 0, ibuf->y-1);

		info->x= x;
		info->y= y;
		info->draw= 1;
		info->channels= ibuf->channels;

		info->colp= NULL;
		info->colfp= NULL;
		info->zp= NULL;
		info->zfp= NULL;
		
		if(ibuf->rect) {
			cp= (char *)(ibuf->rect + y*ibuf->x + x);

			info->col[0]= cp[0];
			info->col[1]= cp[1];
			info->col[2]= cp[2];
			info->col[3]= cp[3];
			info->colp= info->col;

			info->colf[0]= (float)cp[0]/255.0f;
			info->colf[1]= (float)cp[1]/255.0f;
			info->colf[2]= (float)cp[2]/255.0f;
			info->colf[3]= (float)cp[3]/255.0f;
			info->colfp= info->colf;
		}
		if(ibuf->rect_float) {
			fp= (ibuf->rect_float + (ibuf->channels)*(y*ibuf->x + x));

			info->colf[0]= fp[0];
			info->colf[1]= fp[1];
			info->colf[2]= fp[2];
			info->colf[3]= fp[3];
			info->colfp= info->colf;
		}

		if(ibuf->zbuf) {
			info->z= ibuf->zbuf[y*ibuf->x + x];
			info->zp= &info->z;
		}
		if(ibuf->zbuf_float) {
			info->zf= ibuf->zbuf_float[y*ibuf->x + x];
			info->zfp= &info->zf;
		}
		
		if(sima->cumap && ibuf->channels==4) {
			/* we reuse this callback for set curves point operators */
			if(RNA_struct_find_property(op->ptr, "point")) {
				int point= RNA_enum_get(op->ptr, "point");

				if(point == 1) {
					curvemapping_set_black_white(sima->cumap, NULL, info->colfp);
					curvemapping_do_ibuf(sima->cumap, ibuf);
				}
				else if(point == 0) {
					curvemapping_set_black_white(sima->cumap, info->colfp, NULL);
					curvemapping_do_ibuf(sima->cumap, ibuf);
				}
			}
		}
				
		// XXX node curve integration ..
#if 0
		{
			ScrArea *sa, *cur= curarea;
			
			node_curvemap_sample(fp);	/* sends global to node editor */
			for(sa= G.curscreen->areabase.first; sa; sa= sa->next) {
				if(sa->spacetype==SPACE_NODE) {
					areawinset(sa->win);
					scrarea_do_windraw(sa);
				}
			}
			node_curvemap_sample(NULL);		/* clears global in node editor */
			curarea= cur;
		}
#endif
	}
	else
		info->draw= 0;

	ED_space_image_release_buffer(sima, lock);
	ED_area_tag_redraw(CTX_wm_area(C));
}

static void sample_exit(bContext *C, wmOperator *op)
{
	ImageSampleInfo *info= op->customdata;

	ED_region_draw_cb_exit(info->art, info->draw_handle);
	ED_area_tag_redraw(CTX_wm_area(C));
	MEM_freeN(info);
}

static int sample_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	ARegion *ar= CTX_wm_region(C);
	ImageSampleInfo *info;

	if(!ED_space_image_has_buffer(sima))
		return OPERATOR_CANCELLED;
	
	info= MEM_callocN(sizeof(ImageSampleInfo), "ImageSampleInfo");
	info->art= ar->type;
	info->draw_handle = ED_region_draw_cb_activate(ar->type, sample_draw, info, REGION_DRAW_POST_PIXEL);
	op->customdata= info;

	sample_apply(C, op, event);

	WM_event_add_modal_handler(C, op);

	return OPERATOR_RUNNING_MODAL;
}

static int sample_modal(bContext *C, wmOperator *op, wmEvent *event)
{
	switch(event->type) {
		case LEFTMOUSE:
		case RIGHTMOUSE: // XXX hardcoded
			sample_exit(C, op);
			return OPERATOR_CANCELLED;
		case MOUSEMOVE:
			sample_apply(C, op, event);
			break;
	}

	return OPERATOR_RUNNING_MODAL;
}

static int sample_cancel(bContext *C, wmOperator *op)
{
	sample_exit(C, op);
	return OPERATOR_CANCELLED;
}

void IMAGE_OT_sample(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Sample";
	ot->idname= "IMAGE_OT_sample";
	
	/* api callbacks */
	ot->invoke= sample_invoke;
	ot->modal= sample_modal;
	ot->cancel= sample_cancel;
	ot->poll= space_image_main_area_poll;

	/* flags */
	ot->flag= OPTYPE_BLOCKING;
}

/******************** sample line operator ********************/
static int sample_line_exec(bContext *C, wmOperator *op)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	ARegion *ar= CTX_wm_region(C);
	
	int x_start= RNA_int_get(op->ptr, "xstart");
	int y_start= RNA_int_get(op->ptr, "ystart");
	int x_end= RNA_int_get(op->ptr, "xend");
	int y_end= RNA_int_get(op->ptr, "yend");
	
	void *lock;
	ImBuf *ibuf= ED_space_image_acquire_buffer(sima, &lock);
	Histogram *hist= &sima->sample_line_hist;
	
	float x1f, y1f, x2f, y2f;
	int x1, y1, x2, y2;
	int i, x, y;
	float *fp;
	unsigned char *cp;
	
	if (ibuf == NULL) {
		ED_space_image_release_buffer(sima, lock);
		return OPERATOR_CANCELLED;
	}
	/* hmmmm */
	if (ibuf->channels < 3) {
		ED_space_image_release_buffer(sima, lock);
		return OPERATOR_CANCELLED;
	}
	
	UI_view2d_region_to_view(&ar->v2d, x_start, y_start, &x1f, &y1f);
	UI_view2d_region_to_view(&ar->v2d, x_end, y_end, &x2f, &y2f);
	x1= 0.5f+ x1f*ibuf->x;
	x2= 0.5f+ x2f*ibuf->x;
	y1= 0.5f+ y1f*ibuf->y;
	y2= 0.5f+ y2f*ibuf->y;
	
	hist->channels = 3;
	hist->x_resolution = 256;
	hist->xmax = 1.0f;
	hist->ymax = 1.0f;
	
	for (i=0; i<256; i++) {
		x= (int)(0.5f + x1 + (float)i*(x2-x1)/255.0f);
		y= (int)(0.5f + y1 + (float)i*(y2-y1)/255.0f);
		
		if (x<0 || y<0 || x>=ibuf->x || y>=ibuf->y) {
			hist->data_r[i] = hist->data_g[i]= hist->data_b[i] = 0.0f;
		} else {
			if (ibuf->rect_float) {
				fp= (ibuf->rect_float + (ibuf->channels)*(y*ibuf->x + x));
				hist->data_r[i] = fp[0];
				hist->data_g[i] = fp[1];
				hist->data_b[i] = fp[2];
				hist->data_luma[i] = (0.299f*fp[0] + 0.587f*fp[1] + 0.114f*fp[2]);
			}
			else if (ibuf->rect) {
				cp= (unsigned char *)(ibuf->rect + y*ibuf->x + x);
				hist->data_r[i] = (float)cp[0]/255.0f;
				hist->data_g[i] = (float)cp[1]/255.0f;
				hist->data_b[i] = (float)cp[2]/255.0f;
				hist->data_luma[i] = (0.299f*cp[0] + 0.587f*cp[1] + 0.114f*cp[2])/255;
			}
		}
	}
	
	ED_space_image_release_buffer(sima, lock);
	
	ED_area_tag_redraw(CTX_wm_area(C));
	
	return OPERATOR_FINISHED;
}

static int sample_line_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	
	if(!ED_space_image_has_buffer(sima))
		return OPERATOR_CANCELLED;
	
	return WM_gesture_straightline_invoke(C, op, event);
}

void IMAGE_OT_sample_line(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Sample Line";
	ot->idname= "IMAGE_OT_sample_line";
	
	/* api callbacks */
	ot->invoke= sample_line_invoke;
	ot->modal= WM_gesture_straightline_modal;
	ot->exec= sample_line_exec;
	ot->poll= space_image_main_area_poll;
	
	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
	
	WM_operator_properties_gesture_straightline(ot, CURSOR_EDIT);
}

/******************** set curve point operator ********************/

void IMAGE_OT_curves_point_set(wmOperatorType *ot)
{
	static EnumPropertyItem point_items[]= {
		{0, "BLACK_POINT", 0, "Black Point", ""},
		{1, "WHITE_POINT", 0, "White Point", ""},
		{0, NULL, 0, NULL, NULL}};

	/* identifiers */
	ot->name= "Set Curves Point";
	ot->idname= "IMAGE_OT_curves_point_set";

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
	
	/* api callbacks */
	ot->invoke= sample_invoke;
	ot->modal= sample_modal;
	ot->cancel= sample_cancel;
	ot->poll= space_image_main_area_poll;

	/* properties */
	RNA_def_enum(ot->srna, "point", point_items, 0, "Point", "Set black point or white point for curves.");
}

/******************** record composite operator *********************/

typedef struct RecordCompositeData {
	wmTimer *timer;
	int old_cfra;
	int sfra, efra;
} RecordCompositeData;

int record_composite_apply(bContext *C, wmOperator *op)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	RecordCompositeData *rcd= op->customdata;
	Scene *scene= CTX_data_scene(C);
	ImBuf *ibuf;
	
	WM_timecursor(CTX_wm_window(C), scene->r.cfra);

	// XXX scene->nodetree->test_break= blender_test_break;
	// XXX scene->nodetree->test_break= NULL;
	
	BKE_image_all_free_anim_ibufs(scene->r.cfra);
	ntreeCompositTagAnimated(scene->nodetree);
	ntreeCompositExecTree(scene->nodetree, &scene->r, scene->r.cfra != rcd->old_cfra);	/* 1 is no previews */

	ED_area_tag_redraw(CTX_wm_area(C));
	
	ibuf= BKE_image_get_ibuf(sima->image, &sima->iuser);
	/* save memory in flipbooks */
	if(ibuf)
		imb_freerectfloatImBuf(ibuf);
	
	scene->r.cfra++;

	return (scene->r.cfra <= rcd->efra);
}

static int record_composite_init(bContext *C, wmOperator *op)
{
	SpaceImage *sima= CTX_wm_space_image(C);
	Scene *scene= CTX_data_scene(C);
	RecordCompositeData *rcd;

	if(sima->iuser.frames < 2)
		return 0;
	if(scene->nodetree == NULL)
		return 0;
	
	op->customdata= rcd= MEM_callocN(sizeof(RecordCompositeData), "ImageRecordCompositeData");

	rcd->old_cfra= scene->r.cfra;
	rcd->sfra= sima->iuser.sfra;
	rcd->efra= sima->iuser.sfra + sima->iuser.frames-1;
	scene->r.cfra= rcd->sfra;

	return 1;
}

static void record_composite_exit(bContext *C, wmOperator *op)
{
	Scene *scene= CTX_data_scene(C);
	SpaceImage *sima= CTX_wm_space_image(C);
	RecordCompositeData *rcd= op->customdata;

	scene->r.cfra= rcd->old_cfra;

	WM_cursor_restore(CTX_wm_window(C));

	if(rcd->timer)
		WM_event_remove_timer(CTX_wm_manager(C), CTX_wm_window(C), rcd->timer);

	WM_event_add_notifier(C, NC_IMAGE|NA_EDITED, sima->image);

	// XXX play_anim(0);
	// XXX allqueue(REDRAWNODE, 1);

	MEM_freeN(rcd);
}

static int record_composite_exec(bContext *C, wmOperator *op)
{
	if(!record_composite_init(C, op))
		return OPERATOR_CANCELLED;
	
	while(record_composite_apply(C, op))
		;
	
	record_composite_exit(C, op);
	
	return OPERATOR_FINISHED;
}

static int record_composite_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	RecordCompositeData *rcd= op->customdata;
	
	if(!record_composite_init(C, op))
		return OPERATOR_CANCELLED;

	rcd= op->customdata;
	rcd->timer= WM_event_add_timer(CTX_wm_manager(C), CTX_wm_window(C), TIMER, 0.0f);
	WM_event_add_modal_handler(C, op);

	if(!record_composite_apply(C, op))
		return OPERATOR_FINISHED;

	return OPERATOR_RUNNING_MODAL;
}

static int record_composite_modal(bContext *C, wmOperator *op, wmEvent *event)
{
	RecordCompositeData *rcd= op->customdata;

	switch(event->type) {
		case TIMER:
			if(rcd->timer == event->customdata) {
				if(!record_composite_apply(C, op)) {
					record_composite_exit(C, op);
					return OPERATOR_FINISHED;
				}
			}
			break;
		case ESCKEY:
			record_composite_exit(C, op);
			return OPERATOR_FINISHED;
	}

	return OPERATOR_RUNNING_MODAL;
}

static int record_composite_cancel(bContext *C, wmOperator *op)
{
	record_composite_exit(C, op);
	return OPERATOR_CANCELLED;
}

void IMAGE_OT_record_composite(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Record Composite";
	ot->idname= "IMAGE_OT_record_composite";
	
	/* api callbacks */
	ot->exec= record_composite_exec;
	ot->invoke= record_composite_invoke;
	ot->modal= record_composite_modal;
	ot->cancel= record_composite_cancel;
	ot->poll= space_image_buffer_exists_poll;
}

/********************* cycle render slot operator *********************/

static int cycle_render_slot_poll(bContext *C)
{
	Image *ima= CTX_data_edit_image(C);

	return (ima && ima->type == IMA_TYPE_R_RESULT);
}

static int cycle_render_slot_exec(bContext *C, wmOperator *op)
{
	Image *ima= CTX_data_edit_image(C);
	int a, slot, cur= ima->render_slot;

	for(a=1; a<IMA_MAX_RENDER_SLOT; a++) {
		slot= (cur+a)%IMA_MAX_RENDER_SLOT;

		if(ima->renders[slot] || slot == ima->last_render_slot) {
			ima->render_slot= slot;
			break;
		}
	}

	if(a == IMA_MAX_RENDER_SLOT)
		ima->render_slot= ((cur == 1)? 0: 1);
	
	WM_event_add_notifier(C, NC_IMAGE|ND_DRAW, NULL);

	return OPERATOR_FINISHED;
}

void IMAGE_OT_cycle_render_slot(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Cycle Render Slot";
	ot->idname= "IMAGE_OT_cycle_render_slot";
	
	/* api callbacks */
	ot->exec= cycle_render_slot_exec;
	ot->poll= cycle_render_slot_poll;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/******************** TODO ********************/

/* XXX notifier? */

/* goes over all ImageUsers, and sets frame numbers if auto-refresh is set */

void ED_image_update_frame(const bContext *C)
{
	Main *mainp = CTX_data_main(C);
	Scene *scene= CTX_data_scene(C);
	Tex *tex;
	
	/* texture users */
	for(tex= mainp->tex.first; tex; tex= tex->id.next) {
		if(tex->type==TEX_IMAGE && tex->ima) {
			if(ELEM(tex->ima->source, IMA_SRC_MOVIE, IMA_SRC_SEQUENCE)) {
				if(tex->iuser.flag & IMA_ANIM_ALWAYS)
					BKE_image_user_calc_frame(&tex->iuser, scene->r.cfra, 0);
			}
		}
	}
	
#if 0
	/* image window, compo node users */
	if(G.curscreen) {
		ScrArea *sa;
		for(sa= G.curscreen->areabase.first; sa; sa= sa->next) {
			if(sa->spacetype==SPACE_VIEW3D) {
				View3D *v3d= sa->spacedata.first;
				if(v3d->bgpic)
					if(v3d->bgpic->iuser.flag & IMA_ANIM_ALWAYS)
						BKE_image_user_calc_frame(&v3d->bgpic->iuser, scene->r.cfra, 0);
			}
			else if(sa->spacetype==SPACE_IMAGE) {
				SpaceImage *sima= sa->spacedata.first;
				if(sima->iuser.flag & IMA_ANIM_ALWAYS)
					BKE_image_user_calc_frame(&sima->iuser, scene->r.cfra, 0);
			}
			else if(sa->spacetype==SPACE_NODE) {
				SpaceNode *snode= sa->spacedata.first;
				if((snode->treetype==NTREE_COMPOSIT) && (snode->nodetree)) {
					bNode *node;
					for(node= snode->nodetree->nodes.first; node; node= node->next) {
						if(node->id && node->type==CMP_NODE_IMAGE) {
							Image *ima= (Image *)node->id;
							ImageUser *iuser= node->storage;
							if(ELEM(ima->source, IMA_SRC_MOVIE, IMA_SRC_SEQUENCE))
								if(iuser->flag & IMA_ANIM_ALWAYS)
									BKE_image_user_calc_frame(iuser, scene->r.cfra, 0);
						}
					}
				}
			}
		}
	}
#endif
}