space_image.c

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/*
 * ***** 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) 2008 Blender Foundation.
 * All rights reserved.
 *
 * 
 * Contributor(s): Blender Foundation
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include <string.h>
#include <stdio.h>

#include "DNA_meshdata_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"

#include "MEM_guardedalloc.h"

#include "BLI_blenlib.h"
#include "BLI_math.h"
#include "BLI_editVert.h"
#include "BLI_rand.h"
#include "BLI_utildefines.h"

#include "BKE_colortools.h"
#include "BKE_context.h"
#include "BKE_image.h"
#include "BKE_global.h"
#include "BKE_main.h"
#include "BKE_mesh.h"
#include "BKE_scene.h"
#include "BKE_screen.h"

#include "IMB_imbuf_types.h"

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

#include "BIF_gl.h"

#include "RNA_access.h"

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

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

#include "image_intern.h"

/**************************** common state *****************************/

/* note; image_panel_properties() uses pointer to sima->image directly */
Image *ED_space_image(SpaceImage *sima)
{
    return sima->image;
}

/* called to assign images to UV faces */
void ED_space_image_set(SpaceImage *sima, Scene *scene, Object *obedit, Image *ima)
{
    /* context may be NULL, so use global */
    ED_uvedit_assign_image(G.main, scene, obedit, ima, sima->image);
    
    /* change the space ima after because uvedit_face_visible uses the space ima
     * to check if the face is displayed in UV-localview */
    sima->image= ima;
    
    if(ima == NULL || ima->type==IMA_TYPE_R_RESULT || ima->type==IMA_TYPE_COMPOSITE)
        sima->flag &= ~SI_DRAWTOOL;
    
    if(sima->image)
        BKE_image_signal(sima->image, &sima->iuser, IMA_SIGNAL_USER_NEW_IMAGE);
    
    if(sima->image && sima->image->id.us==0)
        sima->image->id.us= 1;
    
    if(obedit)
        WM_main_add_notifier(NC_GEOM|ND_DATA, obedit->data);

    WM_main_add_notifier(NC_SPACE|ND_SPACE_IMAGE, NULL);
}

ImBuf *ED_space_image_acquire_buffer(SpaceImage *sima, void **lock_r)
{
    ImBuf *ibuf;
    
    if(sima && sima->image) {
#if 0
        if(sima->image->type==IMA_TYPE_R_RESULT && BIF_show_render_spare())
            return BIF_render_spare_imbuf();
        else
#endif
            ibuf= BKE_image_acquire_ibuf(sima->image, &sima->iuser, lock_r);
        
        if(ibuf && (ibuf->rect || ibuf->rect_float))
            return ibuf;
    }
    
    return NULL;
}

void ED_space_image_release_buffer(SpaceImage *sima, void *lock)
{
    if(sima && sima->image)
        BKE_image_release_ibuf(sima->image, lock);
}

int ED_space_image_has_buffer(SpaceImage *sima)
{
    ImBuf *ibuf;
    void *lock;
    int has_buffer;
    
    ibuf= ED_space_image_acquire_buffer(sima, &lock);
    has_buffer= (ibuf != NULL);
    ED_space_image_release_buffer(sima, lock);
    
    return has_buffer;
}

void ED_image_size(Image *ima, int *width, int *height)
{
    ImBuf *ibuf= NULL;
    void *lock;
    
    if(ima)
        ibuf= BKE_image_acquire_ibuf(ima, NULL, &lock);
    
    if(ibuf && ibuf->x > 0 && ibuf->y > 0) {
        *width= ibuf->x;
        *height= ibuf->y;
    }
    else {
        *width= 256;
        *height= 256;
    }
    
    if(ima)
        BKE_image_release_ibuf(ima, lock);
}

void ED_space_image_size(SpaceImage *sima, int *width, int *height)
{
    Scene *scene= sima->iuser.scene;
    ImBuf *ibuf;
    void *lock;
    
    ibuf= ED_space_image_acquire_buffer(sima, &lock);
    
    if(ibuf && ibuf->x > 0 && ibuf->y > 0) {
        *width= ibuf->x;
        *height= ibuf->y;
    }
    else if(sima->image && sima->image->type==IMA_TYPE_R_RESULT && scene) {
        /* not very important, just nice */
        *width= (scene->r.xsch*scene->r.size)/100;
        *height= (scene->r.ysch*scene->r.size)/100;

        if((scene->r.mode & R_BORDER) && (scene->r.mode & R_CROP)) {
            *width *= (scene->r.border.xmax - scene->r.border.xmin);
            *height *= (scene->r.border.ymax - scene->r.border.ymin);
        }

    }
    /* I know a bit weak... but preview uses not actual image size */
    // XXX else if(image_preview_active(sima, width, height));
    else {
        *width= 256;
        *height= 256;
    }
    
    ED_space_image_release_buffer(sima, lock);
}

void ED_image_aspect(Image *ima, float *aspx, float *aspy)
{
    *aspx= *aspy= 1.0;
    
    if((ima == NULL) || (ima->type == IMA_TYPE_R_RESULT) || (ima->type == IMA_TYPE_COMPOSITE) ||
       (ima->aspx==0.0f || ima->aspy==0.0f))
        return;
    
    /* x is always 1 */
    *aspy = ima->aspy/ima->aspx;
}

void ED_space_image_aspect(SpaceImage *sima, float *aspx, float *aspy)
{
    ED_image_aspect(ED_space_image(sima), aspx, aspy);
}

void ED_space_image_zoom(SpaceImage *sima, ARegion *ar, float *zoomx, float *zoomy)
{
    int width, height;
    
    ED_space_image_size(sima, &width, &height);
    
    *zoomx= (float)(ar->winrct.xmax - ar->winrct.xmin + 1)/(float)((ar->v2d.cur.xmax - ar->v2d.cur.xmin)*width);
    *zoomy= (float)(ar->winrct.ymax - ar->winrct.ymin + 1)/(float)((ar->v2d.cur.ymax - ar->v2d.cur.ymin)*height);
}

void ED_space_image_uv_aspect(SpaceImage *sima, float *aspx, float *aspy)
{
    int w, h;
    
    ED_space_image_aspect(sima, aspx, aspy);
    ED_space_image_size(sima, &w, &h);

    *aspx *= (float)w;
    *aspy *= (float)h;
    
    if(*aspx < *aspy) {
        *aspy= *aspy / *aspx;
        *aspx= 1.0f;
    }
    else {
        *aspx= *aspx / *aspy;
        *aspy= 1.0f;        
    }
}

void ED_image_uv_aspect(Image *ima, float *aspx, float *aspy)
{
    int w, h;
    
    ED_image_aspect(ima, aspx, aspy);
    ED_image_size(ima, &w, &h);
    
    *aspx *= (float)w;
    *aspy *= (float)h;
}

int ED_space_image_show_render(SpaceImage *sima)
{
    return (sima->image && ELEM(sima->image->type, IMA_TYPE_R_RESULT, IMA_TYPE_COMPOSITE));
}

int ED_space_image_show_paint(SpaceImage *sima)
{
    if(ED_space_image_show_render(sima))
        return 0;
    
    return (sima->flag & SI_DRAWTOOL);
}

int ED_space_image_show_uvedit(SpaceImage *sima, Object *obedit)
{
    if(sima && (ED_space_image_show_render(sima) || ED_space_image_show_paint(sima)))
        return 0;

    if(obedit && obedit->type == OB_MESH) {
        EditMesh *em = BKE_mesh_get_editmesh(obedit->data);
        int ret;
        
        ret = EM_texFaceCheck(em);
        
        BKE_mesh_end_editmesh(obedit->data, em);
        return ret;
    }
    
    return 0;
}

int ED_space_image_show_uvshadow(SpaceImage *sima, Object *obedit)
{
    if(ED_space_image_show_render(sima))
        return 0;
    
    if(ED_space_image_show_paint(sima))
        if(obedit && obedit->type == OB_MESH) {
            EditMesh *em = BKE_mesh_get_editmesh(obedit->data);
            int ret;
            
            ret = EM_texFaceCheck(em);
            
            BKE_mesh_end_editmesh(obedit->data, em);
            return ret;
        }
    
    return 0;
}


static void image_scopes_tag_refresh(ScrArea *sa)
{
    SpaceImage *sima= (SpaceImage *)sa->spacedata.first;
    ARegion *ar;

    /* only while histogram is visible */
    for (ar=sa->regionbase.first; ar; ar=ar->next) {
        if (ar->regiontype == RGN_TYPE_PREVIEW && ar->flag & RGN_FLAG_HIDDEN)
            return;
    }

    sima->scopes.ok=0;
}


/* ******************** manage regions ********************* */

ARegion *image_has_buttons_region(ScrArea *sa)
{
    ARegion *ar, *arnew;

    ar= BKE_area_find_region_type(sa, RGN_TYPE_UI);
    if(ar) return ar;
    
    /* add subdiv level; after header */
    ar= BKE_area_find_region_type(sa, RGN_TYPE_HEADER);

    /* is error! */
    if(ar==NULL) return NULL;
    
    arnew= MEM_callocN(sizeof(ARegion), "buttons for image");
    
    BLI_insertlinkafter(&sa->regionbase, ar, arnew);
    arnew->regiontype= RGN_TYPE_UI;
    arnew->alignment= RGN_ALIGN_LEFT;
    
    arnew->flag = RGN_FLAG_HIDDEN;
    
    return arnew;
}

ARegion *image_has_scope_region(ScrArea *sa)
{
    ARegion *ar, *arnew;

    ar= BKE_area_find_region_type(sa, RGN_TYPE_PREVIEW);
    if(ar) return ar;

    /* add subdiv level; after buttons */
    ar= BKE_area_find_region_type(sa, RGN_TYPE_UI);

    /* is error! */
    if(ar==NULL) return NULL;
    
    arnew= MEM_callocN(sizeof(ARegion), "scopes for image");
    
    BLI_insertlinkafter(&sa->regionbase, ar, arnew);
    arnew->regiontype= RGN_TYPE_PREVIEW;
    arnew->alignment= RGN_ALIGN_RIGHT;
    
    arnew->flag = RGN_FLAG_HIDDEN;

    image_scopes_tag_refresh(sa);
    
    return arnew;
}

/* ******************** default callbacks for image space ***************** */

static SpaceLink *image_new(const bContext *UNUSED(C))
{
    ARegion *ar;
    SpaceImage *simage;
    
    simage= MEM_callocN(sizeof(SpaceImage), "initimage");
    simage->spacetype= SPACE_IMAGE;
    simage->zoom= 1;
    simage->lock= 1;
    
    simage->iuser.ok= 1;
    simage->iuser.fie_ima= 2;
    simage->iuser.frames= 100;
    
    scopes_new(&simage->scopes);
    simage->sample_line_hist.height= 100;

    /* header */
    ar= MEM_callocN(sizeof(ARegion), "header for image");
    
    BLI_addtail(&simage->regionbase, ar);
    ar->regiontype= RGN_TYPE_HEADER;
    ar->alignment= RGN_ALIGN_BOTTOM;
    
    /* buttons/list view */
    ar= MEM_callocN(sizeof(ARegion), "buttons for image");
    
    BLI_addtail(&simage->regionbase, ar);
    ar->regiontype= RGN_TYPE_UI;
    ar->alignment= RGN_ALIGN_LEFT;
    ar->flag = RGN_FLAG_HIDDEN;
    
    /* scopes */
    ar= MEM_callocN(sizeof(ARegion), "buttons for image");
    
    BLI_addtail(&simage->regionbase, ar);
    ar->regiontype= RGN_TYPE_PREVIEW;
    ar->alignment= RGN_ALIGN_RIGHT;
    ar->flag = RGN_FLAG_HIDDEN;

    /* main area */
    ar= MEM_callocN(sizeof(ARegion), "main area for image");
    
    BLI_addtail(&simage->regionbase, ar);
    ar->regiontype= RGN_TYPE_WINDOW;
    
    return (SpaceLink *)simage;
}

/* not spacelink itself */
static void image_free(SpaceLink *sl)
{   
    SpaceImage *simage= (SpaceImage*) sl;
    
    if(simage->cumap)
        curvemapping_free(simage->cumap);
    scopes_free(&simage->scopes);
}


/* spacetype; init callback, add handlers */
static void image_init(struct wmWindowManager *UNUSED(wm), ScrArea *sa)
{
    ListBase *lb= WM_dropboxmap_find("Image", SPACE_IMAGE, 0);

    /* add drop boxes */
    WM_event_add_dropbox_handler(&sa->handlers, lb);
    
}

static SpaceLink *image_duplicate(SpaceLink *sl)
{
    SpaceImage *simagen= MEM_dupallocN(sl);
    
    /* clear or remove stuff from old */
    if(simagen->cumap)
        simagen->cumap= curvemapping_copy(simagen->cumap);

    scopes_new(&simagen->scopes);

    return (SpaceLink *)simagen;
}

static void image_operatortypes(void)
{
    WM_operatortype_append(IMAGE_OT_view_all);
    WM_operatortype_append(IMAGE_OT_view_pan);
    WM_operatortype_append(IMAGE_OT_view_selected);
    WM_operatortype_append(IMAGE_OT_view_zoom);
    WM_operatortype_append(IMAGE_OT_view_zoom_in);
    WM_operatortype_append(IMAGE_OT_view_zoom_out);
    WM_operatortype_append(IMAGE_OT_view_zoom_ratio);
    WM_operatortype_append(IMAGE_OT_view_ndof);

    WM_operatortype_append(IMAGE_OT_new);
    WM_operatortype_append(IMAGE_OT_open);
    WM_operatortype_append(IMAGE_OT_replace);
    WM_operatortype_append(IMAGE_OT_reload);
    WM_operatortype_append(IMAGE_OT_save);
    WM_operatortype_append(IMAGE_OT_save_as);
    WM_operatortype_append(IMAGE_OT_save_sequence);
    WM_operatortype_append(IMAGE_OT_pack);
    WM_operatortype_append(IMAGE_OT_unpack);
    
    WM_operatortype_append(IMAGE_OT_invert);

    WM_operatortype_append(IMAGE_OT_cycle_render_slot);

    WM_operatortype_append(IMAGE_OT_sample);
    WM_operatortype_append(IMAGE_OT_sample_line);
    WM_operatortype_append(IMAGE_OT_curves_point_set);

    WM_operatortype_append(IMAGE_OT_record_composite);

    WM_operatortype_append(IMAGE_OT_properties);
    WM_operatortype_append(IMAGE_OT_scopes);
}

static void image_keymap(struct wmKeyConfig *keyconf)
{
    wmKeyMap *keymap= WM_keymap_find(keyconf, "Image Generic", SPACE_IMAGE, 0);
    wmKeyMapItem *kmi;
    
    WM_keymap_add_item(keymap, "IMAGE_OT_new", NKEY, KM_PRESS, KM_ALT, 0);
    WM_keymap_add_item(keymap, "IMAGE_OT_open", OKEY, KM_PRESS, KM_ALT, 0);
    WM_keymap_add_item(keymap, "IMAGE_OT_reload", RKEY, KM_PRESS, KM_ALT, 0);
    WM_keymap_add_item(keymap, "IMAGE_OT_save", SKEY, KM_PRESS, KM_ALT, 0);
    WM_keymap_add_item(keymap, "IMAGE_OT_save_as", F3KEY, KM_PRESS, 0, 0);
    WM_keymap_add_item(keymap, "IMAGE_OT_properties", NKEY, KM_PRESS, 0, 0);
    WM_keymap_add_item(keymap, "IMAGE_OT_scopes", TKEY, KM_PRESS, 0, 0);

    WM_keymap_add_item(keymap, "IMAGE_OT_cycle_render_slot", JKEY, KM_PRESS, 0, 0);
    RNA_boolean_set(WM_keymap_add_item(keymap, "IMAGE_OT_cycle_render_slot", JKEY, KM_PRESS, KM_ALT, 0)->ptr, "reverse", TRUE);
    
    keymap= WM_keymap_find(keyconf, "Image", SPACE_IMAGE, 0);
    
    WM_keymap_add_item(keymap, "IMAGE_OT_view_all", HOMEKEY, KM_PRESS, 0, 0);
    WM_keymap_add_item(keymap, "IMAGE_OT_view_selected", PADPERIOD, KM_PRESS, 0, 0);
    WM_keymap_add_item(keymap, "IMAGE_OT_view_pan", MIDDLEMOUSE, KM_PRESS, 0, 0);
    WM_keymap_add_item(keymap, "IMAGE_OT_view_pan", MIDDLEMOUSE, KM_PRESS, KM_SHIFT, 0);
    WM_keymap_add_item(keymap, "IMAGE_OT_view_pan", MOUSEPAN, 0, 0, 0);

    WM_keymap_add_item(keymap, "IMAGE_OT_view_all", NDOF_BUTTON_FIT, KM_PRESS, 0, 0); // or view selected?
    WM_keymap_add_item(keymap, "IMAGE_OT_view_ndof", NDOF_MOTION, 0, 0, 0);

    WM_keymap_add_item(keymap, "IMAGE_OT_view_zoom_in", WHEELINMOUSE, KM_PRESS, 0, 0);
    WM_keymap_add_item(keymap, "IMAGE_OT_view_zoom_out", WHEELOUTMOUSE, KM_PRESS, 0, 0);
    WM_keymap_add_item(keymap, "IMAGE_OT_view_zoom_in", PADPLUSKEY, KM_PRESS, 0, 0);
    WM_keymap_add_item(keymap, "IMAGE_OT_view_zoom_out", PADMINUS, KM_PRESS, 0, 0);
    WM_keymap_add_item(keymap, "IMAGE_OT_view_zoom", MIDDLEMOUSE, KM_PRESS, KM_CTRL, 0);
    WM_keymap_add_item(keymap, "IMAGE_OT_view_zoom", MOUSEZOOM, 0, 0, 0);

    RNA_float_set(WM_keymap_add_item(keymap, "IMAGE_OT_view_zoom_ratio", PAD8, KM_PRESS, KM_SHIFT, 0)->ptr, "ratio", 8.0f);
    RNA_float_set(WM_keymap_add_item(keymap, "IMAGE_OT_view_zoom_ratio", PAD4, KM_PRESS, KM_SHIFT, 0)->ptr, "ratio", 4.0f);
    RNA_float_set(WM_keymap_add_item(keymap, "IMAGE_OT_view_zoom_ratio", PAD2, KM_PRESS, KM_SHIFT, 0)->ptr, "ratio", 2.0f);
    RNA_float_set(WM_keymap_add_item(keymap, "IMAGE_OT_view_zoom_ratio", PAD1, KM_PRESS, 0, 0)->ptr, "ratio", 1.0f);
    RNA_float_set(WM_keymap_add_item(keymap, "IMAGE_OT_view_zoom_ratio", PAD2, KM_PRESS, 0, 0)->ptr, "ratio", 0.5f);
    RNA_float_set(WM_keymap_add_item(keymap, "IMAGE_OT_view_zoom_ratio", PAD4, KM_PRESS, 0, 0)->ptr, "ratio", 0.25f);
    RNA_float_set(WM_keymap_add_item(keymap, "IMAGE_OT_view_zoom_ratio", PAD8, KM_PRESS, 0, 0)->ptr, "ratio", 0.125f);

    WM_keymap_add_item(keymap, "IMAGE_OT_sample", ACTIONMOUSE, KM_PRESS, 0, 0);
    RNA_enum_set(WM_keymap_add_item(keymap, "IMAGE_OT_curves_point_set", ACTIONMOUSE, KM_PRESS, KM_CTRL, 0)->ptr, "point", 0);
    RNA_enum_set(WM_keymap_add_item(keymap, "IMAGE_OT_curves_point_set", ACTIONMOUSE, KM_PRESS, KM_SHIFT, 0)->ptr, "point", 1);

    /* toggle editmode is handy to have while UV unwrapping */
    kmi= WM_keymap_add_item(keymap, "OBJECT_OT_mode_set", TABKEY, KM_PRESS, 0, 0);
    RNA_enum_set(kmi->ptr, "mode", OB_MODE_EDIT);
    RNA_boolean_set(kmi->ptr, "toggle", TRUE);
}

/* dropboxes */
static int image_drop_poll(bContext *UNUSED(C), wmDrag *drag, wmEvent *UNUSED(event))
{
    if(drag->type==WM_DRAG_PATH)
        if(ELEM3(drag->icon, 0, ICON_FILE_IMAGE, ICON_FILE_BLANK))  /* rule might not work? */
            return 1;
    return 0;
}

static void image_drop_copy(wmDrag *drag, wmDropBox *drop)
{
    /* copy drag path to properties */
    RNA_string_set(drop->ptr, "filepath", drag->path);
}

/* area+region dropbox definition */
static void image_dropboxes(void)
{
    ListBase *lb= WM_dropboxmap_find("Image", SPACE_IMAGE, 0);
    
    WM_dropbox_add(lb, "IMAGE_OT_open", image_drop_poll, image_drop_copy);
}



static void image_refresh(const bContext *C, ScrArea *UNUSED(sa))
{
    Scene *scene = CTX_data_scene(C);
    SpaceImage *sima= CTX_wm_space_image(C);
    Object *obedit= CTX_data_edit_object(C);
    Image *ima;

    ima= ED_space_image(sima);

    if(sima->iuser.flag & IMA_ANIM_ALWAYS)
        BKE_image_user_calc_frame(&sima->iuser, CTX_data_scene(C)->r.cfra, 0);
    
    /* check if we have to set the image from the editmesh */
    if(ima && (ima->source==IMA_SRC_VIEWER || sima->pin));
    else if(obedit && obedit->type == OB_MESH) {
        Mesh *me= (Mesh*)obedit->data;
        EditMesh *em= BKE_mesh_get_editmesh(me);
        int sloppy= 1; /* partially selected face is ok */

        if(scene_use_new_shading_nodes(scene)) {
            /* new shading system, get image from material */
            EditFace *efa= EM_get_actFace(em, sloppy);

            if(efa) {
                Image *node_ima;
                ED_object_get_active_image(obedit, efa->mat_nr, &node_ima, NULL, NULL);

                if(node_ima)
                    sima->image= node_ima;
            }
        }
        else {
            /* old shading system, we set texface */
            MTFace *tf;
            
            if(em && EM_texFaceCheck(em)) {
                sima->image= NULL;
                
                tf = EM_get_active_mtface(em, NULL, NULL, sloppy);
                
                if(tf) {
                    /* don't need to check for pin here, see above */
                    sima->image= tf->tpage;
                    
                    if(sima->flag & SI_EDITTILE);
                    else sima->curtile= tf->tile;
                }
            }
        }

        BKE_mesh_end_editmesh(obedit->data, em);
    }
}

static void image_listener(ScrArea *sa, wmNotifier *wmn)
{
    SpaceImage *sima= (SpaceImage *)sa->spacedata.first;
    
    /* context changes */
    switch(wmn->category) {
        case NC_SCENE:
            switch(wmn->data) {
                case ND_FRAME:
                    image_scopes_tag_refresh(sa);
                    ED_area_tag_refresh(sa);
                    ED_area_tag_redraw(sa);                 
                    break;
                case ND_MODE:
                case ND_RENDER_RESULT:
                case ND_COMPO_RESULT:
                    if (ED_space_image_show_render(sima))
                        image_scopes_tag_refresh(sa);
                    ED_area_tag_refresh(sa);
                    ED_area_tag_redraw(sa);                 
                    break;
            }
            break;
        case NC_IMAGE:
            if (wmn->reference == sima->image || !wmn->reference) {
                image_scopes_tag_refresh(sa);
                ED_area_tag_refresh(sa);
                ED_area_tag_redraw(sa);
            }
            break;
        case NC_SPACE:  
            if(wmn->data == ND_SPACE_IMAGE) {
                image_scopes_tag_refresh(sa);
                ED_area_tag_redraw(sa);
            }
            break;
        case NC_GEOM:
            switch(wmn->data) {
                case ND_DATA:
                case ND_SELECT:
                    image_scopes_tag_refresh(sa);
                    ED_area_tag_refresh(sa);
                    ED_area_tag_redraw(sa);
                    break;
            }
        case NC_OBJECT:
        {
            Object *ob= (Object *)wmn->reference;
            switch(wmn->data) {
                case ND_TRANSFORM:
                case ND_MODIFIER:
                    if(ob && (ob->mode & OB_MODE_EDIT) && sima->lock && (sima->flag & SI_DRAWSHADOW)) {
                        ED_area_tag_refresh(sa);
                        ED_area_tag_redraw(sa);
                    }
                    break;
            }
        }
    }
}

const char *image_context_dir[] = {"edit_image", NULL};

static int image_context(const bContext *C, const char *member, bContextDataResult *result)
{
    SpaceImage *sima= CTX_wm_space_image(C);

    if(CTX_data_dir(member)) {
        CTX_data_dir_set(result, image_context_dir);
    }
    else if(CTX_data_equals(member, "edit_image")) {
        CTX_data_id_pointer_set(result, (ID*)ED_space_image(sima));
        return 1;
    }

    return 0;
}

/************************** main region ***************************/

/* sets up the fields of the View2D from zoom and offset */
static void image_main_area_set_view2d(SpaceImage *sima, ARegion *ar)
{
    Image *ima= ED_space_image(sima);
    float x1, y1, w, h;
    int width, height, winx, winy;
    
#if 0
    if(image_preview_active(curarea, &width, &height));
    else
#endif
    ED_space_image_size(sima, &width, &height);

    w= width;
    h= height;
    
    if(ima)
        h *= ima->aspy/ima->aspx;

    winx= ar->winrct.xmax - ar->winrct.xmin + 1;
    winy= ar->winrct.ymax - ar->winrct.ymin + 1;
        
    ar->v2d.tot.xmin= 0;
    ar->v2d.tot.ymin= 0;
    ar->v2d.tot.xmax= w;
    ar->v2d.tot.ymax= h;
    
    ar->v2d.mask.xmin= ar->v2d.mask.ymin= 0;
    ar->v2d.mask.xmax= winx;
    ar->v2d.mask.ymax= winy;

    /* which part of the image space do we see? */
    x1= ar->winrct.xmin+(winx-sima->zoom*w)/2.0f;
    y1= ar->winrct.ymin+(winy-sima->zoom*h)/2.0f;

    x1-= sima->zoom*sima->xof;
    y1-= sima->zoom*sima->yof;
    
    /* relative display right */
    ar->v2d.cur.xmin= ((ar->winrct.xmin - (float)x1)/sima->zoom);
    ar->v2d.cur.xmax= ar->v2d.cur.xmin + ((float)winx/sima->zoom);
    
    /* relative display left */
    ar->v2d.cur.ymin= ((ar->winrct.ymin-(float)y1)/sima->zoom);
    ar->v2d.cur.ymax= ar->v2d.cur.ymin + ((float)winy/sima->zoom);
    
    /* normalize 0.0..1.0 */
    ar->v2d.cur.xmin /= w;
    ar->v2d.cur.xmax /= w;
    ar->v2d.cur.ymin /= h;
    ar->v2d.cur.ymax /= h;
}

/* add handlers, stuff you only do once or on area/region changes */
static void image_main_area_init(wmWindowManager *wm, ARegion *ar)
{
    wmKeyMap *keymap;
    
    // image space manages own v2d
    // UI_view2d_region_reinit(&ar->v2d, V2D_COMMONVIEW_STANDARD, ar->winx, ar->winy);

    /* image paint polls for mode */
    keymap= WM_keymap_find(wm->defaultconf, "Image Paint", 0, 0);
    WM_event_add_keymap_handler_bb(&ar->handlers, keymap, &ar->v2d.mask, &ar->winrct);

    keymap= WM_keymap_find(wm->defaultconf, "UV Editor", 0, 0);
    WM_event_add_keymap_handler(&ar->handlers, keymap);
    
    /* own keymaps */
    keymap= WM_keymap_find(wm->defaultconf, "Image Generic", SPACE_IMAGE, 0);
    WM_event_add_keymap_handler(&ar->handlers, keymap);
    keymap= WM_keymap_find(wm->defaultconf, "Image", SPACE_IMAGE, 0);
    WM_event_add_keymap_handler_bb(&ar->handlers, keymap, &ar->v2d.mask, &ar->winrct);

}

static void image_main_area_draw(const bContext *C, ARegion *ar)
{
    /* draw entirely, view changes should be handled here */
    SpaceImage *sima= CTX_wm_space_image(C);
    Object *obedit= CTX_data_edit_object(C);
    Scene *scene= CTX_data_scene(C);
    View2D *v2d= &ar->v2d;
    //View2DScrollers *scrollers;
    float col[3];
    
    /* XXX not supported yet, disabling for now */
    scene->r.scemode &= ~R_COMP_CROP;
    
    /* clear and setup matrix */
    UI_GetThemeColor3fv(TH_BACK, col);
    glClearColor(col[0], col[1], col[2], 0.0);
    glClear(GL_COLOR_BUFFER_BIT);

    /* put scene context variable in iuser */
    sima->iuser.scene= scene;

    /* we set view2d from own zoom and offset each time */
    image_main_area_set_view2d(sima, ar);
    
    /* we draw image in pixelspace */
    draw_image_main(sima, ar, scene);

    /* and uvs in 0.0-1.0 space */
    UI_view2d_view_ortho(v2d);
    draw_uvedit_main(sima, ar, scene, obedit);

    ED_region_draw_cb_draw(C, ar, REGION_DRAW_POST_VIEW);
        
    /* Grease Pencil too (in addition to UV's) */
    draw_image_grease_pencil((bContext *)C, 1); 

    UI_view2d_view_restore(C);

    /* draw Grease Pencil - screen space only */
    draw_image_grease_pencil((bContext *)C, 0);
    
    /* scrollers? */
    /*scrollers= UI_view2d_scrollers_calc(C, v2d, V2D_UNIT_VALUES, V2D_GRID_CLAMP, V2D_ARG_DUMMY, V2D_ARG_DUMMY);
    UI_view2d_scrollers_draw(C, v2d, scrollers);
    UI_view2d_scrollers_free(scrollers);*/
}

static void image_main_area_listener(ARegion *ar, wmNotifier *wmn)
{
    /* context changes */
    switch(wmn->category) {
        case NC_SCREEN:
            if (wmn->data==ND_GPENCIL)
                ED_region_tag_redraw(ar);
        break;
    }
}

/* *********************** buttons region ************************ */

/* add handlers, stuff you only do once or on area/region changes */
static void image_buttons_area_init(wmWindowManager *wm, ARegion *ar)
{
    wmKeyMap *keymap;

    ED_region_panels_init(wm, ar);
    
    keymap= WM_keymap_find(wm->defaultconf, "Image Generic", SPACE_IMAGE, 0);
    WM_event_add_keymap_handler(&ar->handlers, keymap);
}

static void image_buttons_area_draw(const bContext *C, ARegion *ar)
{
    ED_region_panels(C, ar, 1, NULL, -1);
}

static void image_buttons_area_listener(ARegion *ar, wmNotifier *wmn)
{
    /* context changes */
    switch(wmn->category) {
        case NC_SCREEN:
            if (wmn->data==ND_GPENCIL)
                ED_region_tag_redraw(ar);
            break;
        case NC_BRUSH:
            if(wmn->action==NA_EDITED)
                ED_region_tag_redraw(ar);
            break;
    }
}

/* *********************** scopes region ************************ */

/* add handlers, stuff you only do once or on area/region changes */
static void image_scope_area_init(wmWindowManager *wm, ARegion *ar)
{
    wmKeyMap *keymap;
    
    ED_region_panels_init(wm, ar);
    
    keymap= WM_keymap_find(wm->defaultconf, "Image Generic", SPACE_IMAGE, 0);
    WM_event_add_keymap_handler(&ar->handlers, keymap);
}

static void image_scope_area_draw(const bContext *C, ARegion *ar)
{
    SpaceImage *sima= CTX_wm_space_image(C);
    Scene *scene= CTX_data_scene(C);
    void *lock;
    ImBuf *ibuf= ED_space_image_acquire_buffer(sima, &lock);
    if(ibuf) {
        scopes_update(&sima->scopes, ibuf, scene->r.color_mgt_flag & R_COLOR_MANAGEMENT );
    }
    ED_space_image_release_buffer(sima, lock);
    
    ED_region_panels(C, ar, 1, NULL, -1);
}

static void image_scope_area_listener(ARegion *ar, wmNotifier *wmn)
{
    /* context changes */
    switch(wmn->category) {
        case NC_SCENE:
            switch(wmn->data) {
                case ND_MODE:
                case ND_RENDER_RESULT:
                case ND_COMPO_RESULT:
                    ED_region_tag_redraw(ar);
                    break;
            }
            break;
        case NC_IMAGE:
            ED_region_tag_redraw(ar);
            break;
        case NC_NODE:
            ED_region_tag_redraw(ar);
            break;
            
    }
}

/************************* header region **************************/

/* add handlers, stuff you only do once or on area/region changes */
static void image_header_area_init(wmWindowManager *UNUSED(wm), ARegion *ar)
{
    ED_region_header_init(ar);
}

static void image_header_area_draw(const bContext *C, ARegion *ar)
{
    ED_region_header(C, ar);
}

static void image_header_area_listener(ARegion *ar, wmNotifier *wmn)
{
    /* context changes */
    switch(wmn->category) {
        case NC_SCENE:
            switch(wmn->data) {
                case ND_MODE:
                case ND_TOOLSETTINGS:
                    ED_region_tag_redraw(ar);
                    break;
            }
            break;
        case NC_GEOM:
            switch(wmn->data) {
                case ND_DATA:
                case ND_SELECT:
                    ED_region_tag_redraw(ar);
                    break;
            }
            
    }
}

/**************************** spacetype *****************************/

/* only called once, from space/spacetypes.c */
void ED_spacetype_image(void)
{
    SpaceType *st= MEM_callocN(sizeof(SpaceType), "spacetype image");
    ARegionType *art;
    
    st->spaceid= SPACE_IMAGE;
    strncpy(st->name, "Image", BKE_ST_MAXNAME);
    
    st->new= image_new;
    st->free= image_free;
    st->init= image_init;
    st->duplicate= image_duplicate;
    st->operatortypes= image_operatortypes;
    st->keymap= image_keymap;
    st->dropboxes= image_dropboxes;
    st->refresh= image_refresh;
    st->listener= image_listener;
    st->context= image_context;
    
    /* regions: main window */
    art= MEM_callocN(sizeof(ARegionType), "spacetype image region");
    art->regionid = RGN_TYPE_WINDOW;
    art->keymapflag= ED_KEYMAP_FRAMES|ED_KEYMAP_GPENCIL;
    art->init= image_main_area_init;
    art->draw= image_main_area_draw;
    art->listener= image_main_area_listener;

    BLI_addhead(&st->regiontypes, art);
    
    /* regions: listview/buttons */
    art= MEM_callocN(sizeof(ARegionType), "spacetype image region");
    art->regionid = RGN_TYPE_UI;
    art->prefsizex= 220; // XXX
    art->keymapflag= ED_KEYMAP_UI|ED_KEYMAP_FRAMES;
    art->listener= image_buttons_area_listener;
    art->init= image_buttons_area_init;
    art->draw= image_buttons_area_draw;
    BLI_addhead(&st->regiontypes, art);

    image_buttons_register(art);
    ED_uvedit_buttons_register(art);
    
    /* regions: statistics/scope buttons */
    art= MEM_callocN(sizeof(ARegionType), "spacetype image region");
    art->regionid = RGN_TYPE_PREVIEW;
    art->prefsizex= 220; // XXX
    art->keymapflag= ED_KEYMAP_UI|ED_KEYMAP_FRAMES;
    art->listener= image_scope_area_listener;
    art->init= image_scope_area_init;
    art->draw= image_scope_area_draw;
    BLI_addhead(&st->regiontypes, art);

    /* regions: header */
    art= MEM_callocN(sizeof(ARegionType), "spacetype image region");
    art->regionid = RGN_TYPE_HEADER;
    art->prefsizey= HEADERY;
    art->keymapflag= ED_KEYMAP_UI|ED_KEYMAP_VIEW2D|ED_KEYMAP_FRAMES|ED_KEYMAP_HEADER;
    art->listener= image_header_area_listener;
    art->init= image_header_area_init;
    art->draw= image_header_area_draw;
    
    BLI_addhead(&st->regiontypes, art);
    
    BKE_spacetype_register(st);
}