source/blender/editors/space_image/image_draw.c

   1 /**
   2  * $Id$
   3  *
   4  * ***** BEGIN GPL LICENSE BLOCK *****
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  *
  20  * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
  21  * All rights reserved.
  22  *
  23  * Contributor(s): Blender Foundation, 2002-2009
  24  *
  25  * ***** END GPL LICENSE BLOCK *****
  26  */
  27
  28 #include <math.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31
  32 #include "MEM_guardedalloc.h"
  33
  34 #include "DNA_camera_types.h"
  35 #include "DNA_object_types.h"
  36 #include "DNA_space_types.h"
  37 #include "DNA_scene_types.h"
  38 #include "DNA_screen_types.h"
  39 #include "DNA_brush_types.h"
  40
  41 #include "PIL_time.h"
  42
  43 #include "BLI_threads.h"
  44 #include "BLI_utildefines.h"
  45
  46 #include "IMB_imbuf.h"
  47 #include "IMB_imbuf_types.h"
  48
  49 #include "BKE_context.h"
  50 #include "BKE_global.h"
  51 #include "BKE_image.h"
  52 #include "BKE_paint.h"
  53
  54 #ifdef WITH_LCMS
  55 #include "BKE_colortools.h"
  56 #endif
  57
  58 #include "BIF_gl.h"
  59 #include "BIF_glutil.h"
  60
  61 #include "BLF_api.h"
  62
  63 #include "ED_gpencil.h"
  64 #include "ED_image.h"
  65
  66 #include "UI_interface.h"
  67 #include "UI_resources.h"
  68 #include "UI_view2d.h"
  69
  70
  71 #include "RE_pipeline.h"
  72
  73 #include "image_intern.h"
  74
  75 #define HEADER_HEIGHT 18
  76
  77 static void image_verify_buffer_float(Image *ima, ImBuf *ibuf, int color_manage)
  78 {
  79         /* detect if we need to redo the curve map.
  80            ibuf->rect is zero for compositor and render results after change
  81            convert to 32 bits always... drawing float rects isnt supported well (atis)
  82
  83            NOTE: if float buffer changes, we have to manually remove the rect
  84         */
  85
  86         if(ibuf->rect_float && ibuf->rect==NULL) {
  87                 if(color_manage) {
  88                         if(ima && ima->source == IMA_SRC_VIEWER)
  89                                 ibuf->profile = IB_PROFILE_LINEAR_RGB;
  90                 }
  91                 else
  92                         ibuf->profile = IB_PROFILE_NONE;
  93
  94                 IMB_rect_from_float(ibuf);
  95         }
  96 }
  97
  98 static void draw_render_info(Scene *scene, Image *ima, ARegion *ar)
  99 {
 100         RenderResult *rr;
 101         rcti rect;
 102         float colf[3];
 103
 104         rr= BKE_image_acquire_renderresult(scene, ima);
 105
 106         if(rr && rr->text) {
 107                 rect= ar->winrct;
 108                 rect.xmin= 0;
 109                 rect.ymin= ar->winrct.ymax - ar->winrct.ymin - HEADER_HEIGHT;
 110                 rect.xmax= ar->winrct.xmax - ar->winrct.xmin;
 111                 rect.ymax= ar->winrct.ymax - ar->winrct.ymin;
 112
 113                 /* clear header rect */
 114                 UI_GetThemeColor3fv(TH_BACK, colf);
 115                 glEnable(GL_BLEND);
 116                 glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
 117                 glColor4f(colf[0]+0.1f, colf[1]+0.1f, colf[2]+0.1f, 0.5f);
 118                 glRecti(rect.xmin, rect.ymin, rect.xmax, rect.ymax+1);
 119                 glDisable(GL_BLEND);
 120
 121                 UI_ThemeColor(TH_TEXT_HI);
 122
 123                 UI_DrawString(12, rect.ymin + 5, rr->text);
 124         }
 125
 126         BKE_image_release_renderresult(scene, ima);
 127 }
 128
 129 void draw_image_info(ARegion *ar, int channels, int x, int y, char *cp, float *fp, int *zp, float *zpf)
 130 {
 131         char str[256];
 132         int ofs;
 133
 134         ofs= sprintf(str, "X: %4d Y: %4d ", x, y);
 135         if(cp)
 136                 ofs+= sprintf(str+ofs, "| R: %3d G: %3d B: %3d A: %3d ", cp[0], cp[1], cp[2], cp[3]);
 137
 138         if(fp) {
 139                 if(channels==4)
 140                         ofs+= sprintf(str+ofs, "| R: %.3f G: %.3f B: %.3f A: %.3f ", fp[0], fp[1], fp[2], fp[3]);
 141                 else if(channels==1)
 142                         ofs+= sprintf(str+ofs, "| Val: %.3f ", fp[0]);
 143                 else if(channels==3)
 144                         ofs+= sprintf(str+ofs, "| R: %.3f G: %.3f B: %.3f ", fp[0], fp[1], fp[2]);
 145         }
 146
 147         if(zp)
 148                 ofs+= sprintf(str+ofs, "| Z: %.4f ", 0.5+0.5*(((float)*zp)/(float)0x7fffffff));
 149         if(zpf)
 150                 ofs+= sprintf(str+ofs, "| Z: %.3f ", *zpf);
 151
 152         glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
 153         glEnable(GL_BLEND);
 154
 155         glColor4f(.0,.0,.0,.25);
 156         glRecti(0.0, 0.0, ar->winrct.xmax - ar->winrct.xmin + 1, 20);
 157         glDisable(GL_BLEND);
 158
 159         glColor3ub(255, 255, 255);
 160
 161         // UI_DrawString(6, 6, str); // works ok but fixed width is nicer.
 162         BLF_size(blf_mono_font, 11, 72);
 163         BLF_position(blf_mono_font, 6, 6, 0);
 164         BLF_draw_ascii(blf_mono_font, str, sizeof(str));
 165
 166 }
 167
 168 /* image drawing */
 169
 170 static void draw_image_grid(ARegion *ar, float zoomx, float zoomy)
 171 {
 172         float gridsize, gridstep= 1.0f/32.0f;
 173         float fac, blendfac;
 174         int x1, y1, x2, y2;
 175
 176         /* the image is located inside (0,0),(1, 1) as set by view2d */
 177         UI_ThemeColorShade(TH_BACK, 20);
 178
 179         UI_view2d_to_region_no_clip(&ar->v2d, 0.0f, 0.0f, &x1, &y1);
 180         UI_view2d_to_region_no_clip(&ar->v2d, 1.0f, 1.0f, &x2, &y2);
 181         glRectf(x1, y1, x2, y2);
 182
 183         /* gridsize adapted to zoom level */
 184         gridsize= 0.5f*(zoomx+zoomy);
 185         if(gridsize<=0.0f) return;
 186
 187         if(gridsize<1.0f) {
 188                 while(gridsize<1.0f) {
 189                         gridsize*= 4.0;
 190                         gridstep*= 4.0;
 191                 }
 192         }
 193         else {
 194                 while(gridsize>=4.0f) {
 195                         gridsize/= 4.0;
 196                         gridstep/= 4.0;
 197                 }
 198         }
 199
 200         /* the fine resolution level */
 201         blendfac= 0.25*gridsize - floor(0.25*gridsize);
 202         CLAMP(blendfac, 0.0, 1.0);
 203         UI_ThemeColorShade(TH_BACK, (int)(20.0*(1.0-blendfac)));
 204
 205         fac= 0.0f;
 206         glBegin(GL_LINES);
 207         while(fac<1.0f) {
 208                 glVertex2f(x1, y1*(1.0f-fac) + y2*fac);
 209                 glVertex2f(x2, y1*(1.0f-fac) + y2*fac);
 210                 glVertex2f(x1*(1.0f-fac) + x2*fac, y1);
 211                 glVertex2f(x1*(1.0f-fac) + x2*fac, y2);
 212                 fac+= gridstep;
 213         }
 214
 215         /* the large resolution level */
 216         UI_ThemeColor(TH_BACK);
 217
 218         fac= 0.0f;
 219         while(fac<1.0f) {
 220                 glVertex2f(x1, y1*(1.0f-fac) + y2*fac);
 221                 glVertex2f(x2, y1*(1.0f-fac) + y2*fac);
 222                 glVertex2f(x1*(1.0f-fac) + x2*fac, y1);
 223                 glVertex2f(x1*(1.0f-fac) + x2*fac, y2);
 224                 fac+= 4.0f*gridstep;
 225         }
 226         glEnd();
 227 }
 228
 229 static void sima_draw_alpha_backdrop(float x1, float y1, float xsize, float ysize, float zoomx, float zoomy, unsigned char col1[3], unsigned char col2[3])
 230 {
 231         GLubyte checker_stipple[32*32/8] =
 232         {
 233                 255,255,0,0,255,255,0,0,255,255,0,0,255,255,0,0, \
 234                 255,255,0,0,255,255,0,0,255,255,0,0,255,255,0,0, \
 235                 255,255,0,0,255,255,0,0,255,255,0,0,255,255,0,0, \
 236                 255,255,0,0,255,255,0,0,255,255,0,0,255,255,0,0, \
 237                 0,0,255,255,0,0,255,255,0,0,255,255,0,0,255,255, \
 238                 0,0,255,255,0,0,255,255,0,0,255,255,0,0,255,255, \
 239                 0,0,255,255,0,0,255,255,0,0,255,255,0,0,255,255, \
 240                 0,0,255,255,0,0,255,255,0,0,255,255,0,0,255,255, \
 241         };
 242
 243         glColor3ubv(col1);
 244         glRectf(x1, y1, x1 + zoomx*xsize, y1 + zoomy*ysize);
 245         glColor3ubv(col2);
 246
 247         glEnable(GL_POLYGON_STIPPLE);
 248         glPolygonStipple(checker_stipple);
 249         glRectf(x1, y1, x1 + zoomx*xsize, y1 + zoomy*ysize);
 250         glDisable(GL_POLYGON_STIPPLE);
 251 }
 252
 253 static void sima_draw_alpha_pixels(float x1, float y1, int rectx, int recty, unsigned int *recti)
 254 {
 255
 256         /* swap bytes, so alpha is most significant one, then just draw it as luminance int */
 257         if(ENDIAN_ORDER == B_ENDIAN)
 258                 glPixelStorei(GL_UNPACK_SWAP_BYTES, 1);
 259
 260         glaDrawPixelsSafe(x1, y1, rectx, recty, rectx, GL_LUMINANCE, GL_UNSIGNED_INT, recti);
 261         glPixelStorei(GL_UNPACK_SWAP_BYTES, 0);
 262 }
 263
 264 static void sima_draw_alpha_pixelsf(float x1, float y1, int rectx, int recty, float *rectf)
 265 {
 266         float *trectf= MEM_mallocN(rectx*recty*4, "temp");
 267         int a, b;
 268
 269         for(a= rectx*recty -1, b= 4*a+3; a>=0; a--, b-=4)
 270                 trectf[a]= rectf[b];
 271
 272         glaDrawPixelsSafe(x1, y1, rectx, recty, rectx, GL_LUMINANCE, GL_FLOAT, trectf);
 273         MEM_freeN(trectf);
 274         /* ogl trick below is slower... (on ATI 9600) */
 275 //      glColorMask(1, 0, 0, 0);
 276 //      glaDrawPixelsSafe(x1, y1, rectx, recty, rectx, GL_RGBA, GL_FLOAT, rectf+3);
 277 //      glColorMask(0, 1, 0, 0);
 278 //      glaDrawPixelsSafe(x1, y1, rectx, recty, rectx, GL_RGBA, GL_FLOAT, rectf+2);
 279 //      glColorMask(0, 0, 1, 0);
 280 //      glaDrawPixelsSafe(x1, y1, rectx, recty, rectx, GL_RGBA, GL_FLOAT, rectf+1);
 281 //      glColorMask(1, 1, 1, 1);
 282 }
 283
 284 #ifdef WITH_LCMS
 285 static int sima_draw_colorcorrected_pixels(float x1, float y1, ImBuf *ibuf)
 286 {
 287         colorcorrection_do_ibuf(ibuf, "MONOSCNR.ICM"); /* path is hardcoded here, find some place better */
 288
 289         if(ibuf->crect) {
 290                 glaDrawPixelsSafe(x1, y1, ibuf->x, ibuf->y, ibuf->x, GL_RGBA, GL_UNSIGNED_BYTE, ibuf->crect);
 291                 return 1;
 292         }
 293
 294         return 0;
 295 }
 296 #endif
 297
 298 static void sima_draw_zbuf_pixels(float x1, float y1, int rectx, int recty, int *recti)
 299 {
 300         /* zbuffer values are signed, so we need to shift color range */
 301         glPixelTransferf(GL_RED_SCALE, 0.5f);
 302         glPixelTransferf(GL_GREEN_SCALE, 0.5f);
 303         glPixelTransferf(GL_BLUE_SCALE, 0.5f);
 304         glPixelTransferf(GL_RED_BIAS, 0.5f);
 305         glPixelTransferf(GL_GREEN_BIAS, 0.5f);
 306         glPixelTransferf(GL_BLUE_BIAS, 0.5f);
 307
 308         glaDrawPixelsSafe(x1, y1, rectx, recty, rectx, GL_LUMINANCE, GL_INT, recti);
 309
 310         glPixelTransferf(GL_RED_SCALE, 1.0f);
 311         glPixelTransferf(GL_GREEN_SCALE, 1.0f);
 312         glPixelTransferf(GL_BLUE_SCALE, 1.0f);
 313         glPixelTransferf(GL_RED_BIAS, 0.0f);
 314         glPixelTransferf(GL_GREEN_BIAS, 0.0f);
 315         glPixelTransferf(GL_BLUE_BIAS, 0.0f);
 316 }
 317
 318 static void sima_draw_zbuffloat_pixels(Scene *scene, float x1, float y1, int rectx, int recty, float *rect_float)
 319 {
 320         float bias, scale, *rectf, clipend;
 321         int a;
 322
 323         if(scene->camera && scene->camera->type==OB_CAMERA) {
 324                 bias= ((Camera *)scene->camera->data)->clipsta;
 325                 clipend= ((Camera *)scene->camera->data)->clipend;
 326                 scale= 1.0f/(clipend-bias);
 327         }
 328         else {
 329                 bias= 0.1f;
 330                 scale= 0.01f;
 331                 clipend= 100.0f;
 332         }
 333
 334         rectf= MEM_mallocN(rectx*recty*4, "temp");
 335         for(a= rectx*recty -1; a>=0; a--) {
 336                 if(rect_float[a]>clipend)
 337                         rectf[a]= 0.0f;
 338                 else if(rect_float[a]<bias)
 339                         rectf[a]= 1.0f;
 340                 else {
 341                         rectf[a]= 1.0f - (rect_float[a]-bias)*scale;
 342                         rectf[a]*= rectf[a];
 343                 }
 344         }
 345         glaDrawPixelsSafe(x1, y1, rectx, recty, rectx, GL_LUMINANCE, GL_FLOAT, rectf);
 346
 347         MEM_freeN(rectf);
 348 }
 349
 350 static void draw_image_buffer(SpaceImage *sima, ARegion *ar, Scene *scene, Image *ima, ImBuf *ibuf, float fx, float fy, float zoomx, float zoomy)
 351 {
 352         int x, y;
 353         int color_manage = scene->r.color_mgt_flag & R_COLOR_MANAGEMENT;
 354
 355         /* set zoom */
 356         glPixelZoom(zoomx, zoomy);
 357
 358         /* find window pixel coordinates of origin */
 359         UI_view2d_to_region_no_clip(&ar->v2d, fx, fy, &x, &y);
 360
 361         /* this part is generic image display */
 362         if(sima->flag & SI_SHOW_ALPHA) {
 363                 if(ibuf->rect)
 364                         sima_draw_alpha_pixels(x, y, ibuf->x, ibuf->y, ibuf->rect);
 365                 else if(ibuf->rect_float && ibuf->channels==4)
 366                         sima_draw_alpha_pixelsf(x, y, ibuf->x, ibuf->y, ibuf->rect_float);
 367         }
 368         else if(sima->flag & SI_SHOW_ZBUF && (ibuf->zbuf || ibuf->zbuf_float || (ibuf->channels==1))) {
 369                 if(ibuf->zbuf)
 370                         sima_draw_zbuf_pixels(x, y, ibuf->x, ibuf->y, ibuf->zbuf);
 371                 else if(ibuf->zbuf_float)
 372                         sima_draw_zbuffloat_pixels(scene, x, y, ibuf->x, ibuf->y, ibuf->zbuf_float);
 373                 else if(ibuf->channels==1)
 374                         sima_draw_zbuffloat_pixels(scene, x, y, ibuf->x, ibuf->y, ibuf->rect_float);
 375         }
 376 #ifdef WITH_LCMS
 377         else if(sima->flag & SI_COLOR_CORRECTION) {
 378                 image_verify_buffer_float(ima, ibuf, color_manage);
 379
 380                 if(sima_draw_colorcorrected_pixels(x, y, ibuf)==0) {
 381                         unsigned char col1[3]= {100, 0, 100}, col2[3]= {160, 0, 160}; /* pink says 'warning' in blender land */
 382                         sima_draw_alpha_backdrop(x, y, ibuf->x, ibuf->y, zoomx, zoomy, col1, col2);
 383                 }
 384
 385         }
 386 #endif
 387         else {
 388                 if(sima->flag & SI_USE_ALPHA) {
 389                         unsigned char col1[3]= {100, 100, 100}, col2[3]= {160, 160, 160};
 390                         sima_draw_alpha_backdrop(x, y, ibuf->x, ibuf->y, zoomx, zoomy, col1, col2);
 391
 392                         glEnable(GL_BLEND);
 393                         glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
 394                 }
 395
 396                 /* we don't draw floats buffers directly but
 397                  * convert them, and optionally apply curves */
 398                 image_verify_buffer_float(ima, ibuf, color_manage);
 399
 400                 if(ibuf->rect)
 401                         glaDrawPixelsSafe(x, y, ibuf->x, ibuf->y, ibuf->x, GL_RGBA, GL_UNSIGNED_BYTE, ibuf->rect);
 402                 /*else
 403                         glaDrawPixelsSafe(x, y, ibuf->x, ibuf->y, ibuf->x, GL_RGBA, GL_FLOAT, ibuf->rect_float);*/
 404
 405                 if(sima->flag & SI_USE_ALPHA)
 406                         glDisable(GL_BLEND);
 407         }
 408
 409         /* reset zoom */
 410         glPixelZoom(1.0f, 1.0f);
 411 }
 412
 413 static unsigned int *get_part_from_ibuf(ImBuf *ibuf, short startx, short starty, short endx, short endy)
 414 {
 415         unsigned int *rt, *rp, *rectmain;
 416         short y, heigth, len;
 417
 418         /* the right offset in rectot */
 419
 420         rt= ibuf->rect+ (starty*ibuf->x+ startx);
 421
 422         len= (endx-startx);
 423         heigth= (endy-starty);
 424
 425         rp=rectmain= MEM_mallocN(heigth*len*sizeof(int), "rect");
 426
 427         for(y=0; y<heigth; y++) {
 428                 memcpy(rp, rt, len*4);
 429                 rt+= ibuf->x;
 430                 rp+= len;
 431         }
 432         return rectmain;
 433 }
 434
 435 static void draw_image_buffer_tiled(SpaceImage *sima, ARegion *ar, Scene *scene, Image *ima, ImBuf *ibuf, float fx, float fy, float zoomx, float zoomy)
 436 {
 437         unsigned int *rect;
 438         int dx, dy, sx, sy, x, y;
 439         int color_manage = scene->r.color_mgt_flag & R_COLOR_MANAGEMENT;
 440
 441         /* verify valid values, just leave this a while */
 442         if(ima->xrep<1) return;
 443         if(ima->yrep<1) return;
 444
 445         glPixelZoom(zoomx, zoomy);
 446
 447         if(sima->curtile >= ima->xrep*ima->yrep)
 448                 sima->curtile = ima->xrep*ima->yrep - 1;
 449
 450         /* create char buffer from float if needed */
 451         image_verify_buffer_float(ima, ibuf, color_manage);
 452
 453         /* retrieve part of image buffer */
 454         dx= ibuf->x/ima->xrep;
 455         dy= ibuf->y/ima->yrep;
 456         sx= (sima->curtile % ima->xrep)*dx;
 457         sy= (sima->curtile / ima->xrep)*dy;
 458         rect= get_part_from_ibuf(ibuf, sx, sy, sx+dx, sy+dy);
 459
 460         /* draw repeated */
 461         for(sy=0; sy+dy<=ibuf->y; sy+= dy) {
 462                 for(sx=0; sx+dx<=ibuf->x; sx+= dx) {
 463                         UI_view2d_to_region_no_clip(&ar->v2d, fx + (float)sx/(float)ibuf->x, fy + (float)sy/(float)ibuf->y, &x, &y);
 464
 465                         glaDrawPixelsSafe(x, y, dx, dy, dx, GL_RGBA, GL_UNSIGNED_BYTE, rect);
 466                 }
 467         }
 468
 469         glPixelZoom(1.0f, 1.0f);
 470
 471         MEM_freeN(rect);
 472 }
 473
 474 static void draw_image_buffer_repeated(SpaceImage *sima, ARegion *ar, Scene *scene, Image *ima, ImBuf *ibuf, float zoomx, float zoomy)
 475 {
 476         const double time_current= PIL_check_seconds_timer();
 477
 478         const int xmax= ceil(ar->v2d.cur.xmax);
 479         const int ymax= ceil(ar->v2d.cur.ymax);
 480         const int xmin= floor(ar->v2d.cur.xmin);
 481         const int ymin= floor(ar->v2d.cur.ymin);
 482
 483         int x;
 484
 485         for(x=xmin; x<xmax; x++) {
 486                 int y;
 487                 for(y=ymin; y<ymax; y++) {
 488                         if(ima && (ima->tpageflag & IMA_TILES))
 489                                 draw_image_buffer_tiled(sima, ar, scene, ima, ibuf, x, y, zoomx, zoomy);
 490                         else
 491                                 draw_image_buffer(sima, ar, scene, ima, ibuf, x, y, zoomx, zoomy);
 492
 493                         /* only draw until running out of time */
 494                         if((PIL_check_seconds_timer() - time_current) > 0.25)
 495                                 return;
 496                 }
 497         }
 498 }
 499
 500 /* draw uv edit */
 501
 502 /* draw grease pencil */
 503 void draw_image_grease_pencil(bContext *C, short onlyv2d)
 504 {
 505         /* draw in View2D space? */
 506         if (onlyv2d) {
 507                 /* assume that UI_view2d_ortho(C) has been called... */
 508                 SpaceImage *sima= (SpaceImage *)CTX_wm_space_data(C);
 509                 void *lock;
 510                 ImBuf *ibuf= ED_space_image_acquire_buffer(sima, &lock);
 511
 512                 /* draw grease-pencil ('image' strokes) */
 513                 //if (sima->flag & SI_DISPGP)
 514                         draw_gpencil_2dimage(C, ibuf);
 515
 516                 ED_space_image_release_buffer(sima, lock);
 517         }
 518         else {
 519                 /* assume that UI_view2d_restore(C) has been called... */
 520                 //SpaceImage *sima= (SpaceImage *)CTX_wm_space_data(C);
 521
 522                 /* draw grease-pencil ('screen' strokes) */
 523                 //if (sima->flag & SI_DISPGP)
 524                         draw_gpencil_view2d(C, 0);
 525         }
 526 }
 527
 528 /* XXX becomes WM paint cursor */
 529 #if 0
 530 static void draw_image_view_tool(Scene *scene)
 531 {
 532         ToolSettings *settings= scene->toolsettings;
 533         Brush *brush= settings->imapaint.brush;
 534         short mval[2];
 535         float radius;
 536         int draw= 0;
 537
 538         if(brush) {
 539                 if(settings->imapaint.flag & IMAGEPAINT_DRAWING) {
 540                         if(settings->imapaint.flag & IMAGEPAINT_DRAW_TOOL_DRAWING)
 541                                 draw= 1;
 542                 }
 543                 else if(settings->imapaint.flag & IMAGEPAINT_DRAW_TOOL)
 544                         draw= 1;
 545
 546                 if(draw) {
 547                         getmouseco_areawin(mval);
 548
 549                         radius= brush_size(brush)*G.sima->zoom;
 550                         fdrawXORcirc(mval[0], mval[1], radius);
 551
 552                         if (brush->innerradius != 1.0) {
 553                                 radius *= brush->innerradius;
 554                                 fdrawXORcirc(mval[0], mval[1], radius);
 555                         }
 556                 }
 557         }
 558 }
 559 #endif
 560
 561 static unsigned char *get_alpha_clone_image(Scene *scene, int *width, int *height)
 562 {
 563         Brush *brush = paint_brush(&scene->toolsettings->imapaint.paint);
 564         ImBuf *ibuf;
 565         unsigned int size, alpha;
 566         unsigned char *rect, *cp;
 567
 568         if(!brush || !brush->clone.image)
 569                 return NULL;
 570
 571         ibuf= BKE_image_get_ibuf(brush->clone.image, NULL);
 572
 573         if(!ibuf || !ibuf->rect)
 574                 return NULL;
 575
 576         rect= MEM_dupallocN(ibuf->rect);
 577         if(!rect)
 578                 return NULL;
 579
 580         *width= ibuf->x;
 581         *height= ibuf->y;
 582
 583         size= (*width)*(*height);
 584         alpha= (unsigned char)255*brush->clone.alpha;
 585         cp= rect;
 586
 587         while(size-- > 0) {
 588                 cp[3]= alpha;
 589                 cp += 4;
 590         }
 591
 592         return rect;
 593 }
 594
 595 static void draw_image_paint_helpers(ARegion *ar, Scene *scene, float zoomx, float zoomy)
 596 {
 597         Brush *brush;
 598         int x, y, w, h;
 599         unsigned char *clonerect;
 600
 601         brush= paint_brush(&scene->toolsettings->imapaint.paint);
 602
 603         if(brush && (brush->imagepaint_tool == PAINT_TOOL_CLONE)) {
 604                 /* this is not very efficient, but glDrawPixels doesn't allow
 605                    drawing with alpha */
 606                 clonerect= get_alpha_clone_image(scene, &w, &h);
 607
 608                 if(clonerect) {
 609                         UI_view2d_to_region_no_clip(&ar->v2d, brush->clone.offset[0], brush->clone.offset[1], &x, &y);
 610
 611                         glPixelZoom(zoomx, zoomy);
 612
 613                         glEnable(GL_BLEND);
 614                         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 615                         glaDrawPixelsSafe(x, y, w, h, w, GL_RGBA, GL_UNSIGNED_BYTE, clonerect);
 616                         glDisable(GL_BLEND);
 617
 618                         glPixelZoom(1.0, 1.0);
 619
 620                         MEM_freeN(clonerect);
 621                 }
 622         }
 623 }
 624
 625 /* draw main image area */
 626
 627 void draw_image_main(SpaceImage *sima, ARegion *ar, Scene *scene)
 628 {
 629         Image *ima;
 630         ImBuf *ibuf;
 631         float zoomx, zoomy;
 632         int show_viewer, show_render;
 633         void *lock;
 634
 635         /* XXX can we do this in refresh? */
 636 #if 0
 637         what_image(sima);
 638
 639         if(sima->image) {
 640                 ED_image_aspect(sima->image, &xuser_asp, &yuser_asp);
 641
 642                 /* UGLY hack? until now iusers worked fine... but for flipbook viewer we need this */
 643                 if(sima->image->type==IMA_TYPE_COMPOSITE) {
 644                         ImageUser *iuser= ntree_get_active_iuser(scene->nodetree);
 645                         if(iuser) {
 646                                 BKE_image_user_calc_imanr(iuser, scene->r.cfra, 0);
 647                                 sima->iuser= *iuser;
 648                         }
 649                 }
 650                 /* and we check for spare */
 651                 ibuf= ED_space_image_buffer(sima);
 652         }
 653 #endif
 654
 655         /* retrieve the image and information about it */
 656         ima= ED_space_image(sima);
 657         ED_space_image_zoom(sima, ar, &zoomx, &zoomy);
 658         ibuf= ED_space_image_acquire_buffer(sima, &lock);
 659
 660         show_viewer= (ima && ima->source == IMA_SRC_VIEWER);
 661         show_render= (show_viewer && ima->type == IMA_TYPE_R_RESULT);
 662
 663         /* draw the image or grid */
 664         if(ibuf==NULL)
 665                 draw_image_grid(ar, zoomx, zoomy);
 666         else if(sima->flag & SI_DRAW_TILE)
 667                 draw_image_buffer_repeated(sima, ar, scene, ima, ibuf, zoomx, zoomy);
 668         else if(ima && (ima->tpageflag & IMA_TILES))
 669                 draw_image_buffer_tiled(sima, ar, scene, ima, ibuf, 0.0f, 0.0, zoomx, zoomy);
 670         else
 671                 draw_image_buffer(sima, ar, scene, ima, ibuf, 0.0f, 0.0f, zoomx, zoomy);
 672
 673         /* paint helpers */
 674         if(sima->flag & SI_DRAWTOOL)
 675                 draw_image_paint_helpers(ar, scene, zoomx, zoomy);
 676
 677
 678         /* XXX integrate this code */
 679 #if 0
 680         if(ibuf) {
 681                 float xoffs=0.0f, yoffs= 0.0f;
 682
 683                 if(image_preview_active(sa, &xim, &yim)) {
 684                         xoffs= scene->r.disprect.xmin;
 685                         yoffs= scene->r.disprect.ymin;
 686                         glColor3ub(0,0,0);
 687                         calc_image_view(sima, 'f');
 688                         myortho2(G.v2d->cur.xmin, G.v2d->cur.xmax, G.v2d->cur.ymin, G.v2d->cur.ymax);
 689                         glRectf(0.0f, 0.0f, 1.0f, 1.0f);
 690                         glLoadIdentity();
 691                 }
 692         }
 693 #endif
 694
 695         ED_space_image_release_buffer(sima, lock);
 696
 697         /* render info */
 698         if(ima && show_render)
 699                 draw_render_info(scene, ima, ar);
 700 }
 701