2.5: Space Image ported back

Organized as follows:

uvedit/
	uv editing related code
	uvedit_draw.c: drawing code
	uvedit_ops.c: operators, just a few done
	uvedit_unwrap_ops.c: will be operators for unwrapping
	uvedit_paramatrizer.c: lscm/abf/stretch/pack

space_image/
	space_image.c: registration and common getter/setters
	image_draw.c: drawing code, mostly functional
	image_panels.c: panels, all commented out
	image_render.c: render callbacks, non functional
	image_ops.c: operators, only view navigation done
	image_header.c: header, menus mostly done but missing buttons

Notes:
* Header menus consist only of Operator and RNA buttons, if they
  are not implemented they're displayed grayed out. Ideally the full
  header could work like this, but std_libbuttons looks problematic.

* Started using view2d code more than the old code, but for now it
  still does own view2d management due to some very specific
  requirements that the image window has. The drawing code however
  is more clear hopefully, it only uses view2d, and there is no
  switching between 'p' and 'f' view2d's anymore, it is always 'f'.

* In order to make uvedit operators more independent I move some
  image space settings to scene toolsettings, and the current image
  and its buffer is in the context. Especially sync selection and
  select mode belonged there anyway as this cannot work correct with
  different spaces having different settings anyway.

* Image paint is not back yet, did not want to put that together with
  uvedit because there's really no code sharing.. perhaps vertex paint,
  image paint and sculpt would be good to have in one module to share
  brush code, partial redraw, etc better.

1 files changed, 335 insertions, 0 deletions

diff --git a/source/blender/editors/space_image/image_render.c b/source/blender/editors/space_image/image_render.c
new file mode 100644
index 00000000000..804cb8dc542
--- /dev/null
+++ b/source/blender/editors/space_image/image_render.c
@@ -0,0 +1,335 @@
+/**
+ * $Id$
+ *
+ * ***** 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
+ * All rights reserved.
+ *
+ * Contributor(s): Blender Foundation, 2002-2009
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#include <stdlib.h>
+
+#include "DNA_image_types.h"
+#include "DNA_screen_types.h"
+#include "DNA_space_types.h"
+
+#include "BKE_context.h"
+#include "BKE_global.h"
+#include "BKE_image.h"
+
+#include "BIF_gl.h"
+#include "BIF_glutil.h"
+
+#include "RE_pipeline.h"
+
+#define HEADER_HEIGHT 18
+
+/* *********************** render callbacks ***************** */
+
+/* set on initialize render, only one render output to imagewindow can exist, so the global isnt dangerous yet :) */
+static ScrArea *image_area= NULL;
+
+/* can get as well the full picture, as the parts while rendering */
+static void imagewindow_progress(ScrArea *sa, RenderResult *rr, volatile rcti *renrect)
+{
+	SpaceImage *sima= sa->spacedata.first;
+	float x1, y1, *rectf= NULL;
+	unsigned int *rect32= NULL;
+	int ymin, ymax, xmin, xmax;
+	
+	/* if renrect argument, we only display scanlines */
+	if(renrect) {
+		/* if ymax==recty, rendering of layer is ready, we should not draw, other things happen... */
+		if(rr->renlay==NULL || renrect->ymax>=rr->recty)
+			return;
+		
+		/* xmin here is first subrect x coord, xmax defines subrect width */
+		xmin = renrect->xmin;
+		xmax = renrect->xmax - xmin;
+		if (xmax<2) return;
+		
+		ymin= renrect->ymin;
+		ymax= renrect->ymax - ymin;
+		if(ymax<2)
+			return;
+		renrect->ymin= renrect->ymax;
+	}
+	else {
+		xmin = ymin = 0;
+		xmax = rr->rectx - 2*rr->crop;
+		ymax = rr->recty - 2*rr->crop;
+	}
+	
+	/* image window cruft */
+	
+	/* find current float rect for display, first case is after composit... still weak */
+	if(rr->rectf)
+		rectf= rr->rectf;
+	else {
+		if(rr->rect32)
+			rect32= (unsigned int *)rr->rect32;
+		else {
+			if(rr->renlay==NULL || rr->renlay->rectf==NULL) return;
+			rectf= rr->renlay->rectf;
+		}
+	}
+	if(rectf) {
+		/* if scanline updates... */
+		rectf+= 4*(rr->rectx*ymin + xmin);
+		
+		/* when rendering more pixels than needed, we crop away cruft */
+		if(rr->crop)
+			rectf+= 4*(rr->crop*rr->rectx + rr->crop);
+	}
+	
+	/* tilerect defines drawing offset from (0,0) */
+	/* however, tilerect (xmin, ymin) is first pixel */
+	x1 = sima->centx + (rr->tilerect.xmin + rr->crop + xmin)*sima->zoom;
+	y1 = sima->centy + (rr->tilerect.ymin + rr->crop + ymin)*sima->zoom;
+	
+	/* needed for gla draw */
+	// XXX { rcti rct= ar->winrct; rct.ymax-= HEADER_HEIGHT; glaDefine2DArea(&rct);}
+
+	glPixelZoom(sima->zoom, sima->zoom);
+	
+	if(rect32)
+		glaDrawPixelsSafe(x1, y1, xmax, ymax, rr->rectx, GL_RGBA, GL_UNSIGNED_BYTE, rect32);
+	else
+		glaDrawPixelsSafe_to32(x1, y1, xmax, ymax, rr->rectx, rectf);
+	
+	glPixelZoom(1.0, 1.0);
+	
+}
+
+/* in render window; display a couple of scanlines of rendered image */
+/* NOTE: called while render, so no malloc allowed! */
+static void imagewindow_progress_display_cb(RenderResult *rr, volatile rcti *rect)
+{
+	if (image_area) {
+		imagewindow_progress(image_area, rr, rect);
+
+		/* no screen_swapbuffers, prevent any other window to draw */
+		// XXX myswapbuffers();
+	}
+}
+
+/* unused, init_display_cb is called on each render */
+static void imagewindow_clear_display_cb(RenderResult *rr)
+{
+	if (image_area) {
+	}
+}
+
+/* returns biggest area that is not uv/image editor. Note that it uses buttons */
+/* window as the last possible alternative.									   */
+static ScrArea *biggest_non_image_area(bContext *C)
+{
+	bScreen *sc= CTX_wm_screen(C);
+	ScrArea *sa, *big= NULL;
+	int size, maxsize= 0, bwmaxsize= 0;
+	short foundwin= 0;
+	
+	for(sa= sc->areabase.first; sa; sa= sa->next) {
+		if(sa->winx > 10 && sa->winy > 10) {
+			size= sa->winx*sa->winy;
+			if(sa->spacetype == SPACE_BUTS) {
+				if(foundwin == 0 && size > bwmaxsize) {
+					bwmaxsize= size;
+					big= sa;	
+				}
+			}
+			else if(sa->spacetype != SPACE_IMAGE && size > maxsize) {
+				maxsize= size;
+				big= sa;
+				foundwin= 1;
+			}
+		}
+	}
+		
+	return big;
+}
+
+static ScrArea *biggest_area(bContext *C)
+{
+	bScreen *sc= CTX_wm_screen(C);
+	ScrArea *sa, *big= NULL;
+	int size, maxsize= 0;
+	
+	for(sa= sc->areabase.first; sa; sa= sa->next) {
+		size= sa->winx*sa->winy;
+		if(size > maxsize) {
+			maxsize= size;
+			big= sa;
+		}
+	}
+	return big;
+}
+
+
+/* if R_DISPLAYIMAGE
+      use Image Window showing Render Result
+	  else: turn largest non-image area into Image Window (not to frustrate texture or composite usage)
+	  else: then we use Image Window anyway...
+   if R_DISPSCREEN
+      make a new temp fullscreen area with Image Window
+*/
+
+static ScrArea *find_area_showing_r_result(bContext *C)
+{
+	bScreen *sc= CTX_wm_screen(C);
+	ScrArea *sa;
+	SpaceImage *sima;
+	
+	/* find an imagewindow showing render result */
+	for(sa=sc->areabase.first; sa; sa= sa->next) {
+		if(sa->spacetype==SPACE_IMAGE) {
+			sima= sa->spacedata.first;
+			if(sima->image && sima->image->type==IMA_TYPE_R_RESULT)
+				break;
+		}
+	}
+	return sa;
+}
+
+static ScrArea *imagewindow_set_render_display(bContext *C)
+{
+	ScrArea *sa;
+	SpaceImage *sima;
+	
+	sa= find_area_showing_r_result(C);
+	
+	if(sa==NULL) {
+		/* find largest open non-image area */
+		sa= biggest_non_image_area(C);
+		if(sa) {
+			// XXX newspace(sa, SPACE_IMAGE);
+			sima= sa->spacedata.first;
+			
+			/* makes ESC go back to prev space */
+			sima->flag |= SI_PREVSPACE;
+		}
+		else {
+			/* use any area of decent size */
+			sa= biggest_area(C);
+			if(sa->spacetype!=SPACE_IMAGE) {
+				// XXX newspace(sa, SPACE_IMAGE);
+				sima= sa->spacedata.first;
+				
+				/* makes ESC go back to prev space */
+				sima->flag |= SI_PREVSPACE;
+			}
+		}
+	}
+	
+	sima= sa->spacedata.first;
+	
+	/* get the correct image, and scale it */
+	sima->image= BKE_image_verify_viewer(IMA_TYPE_R_RESULT, "Render Result");
+	
+	if(0) { // XXX G.displaymode==R_DISPLAYSCREEN) {
+		if(sa->full==0) {
+			sima->flag |= SI_FULLWINDOW;
+			/* fullscreen works with lousy curarea */
+			// XXX curarea= sa;
+			// XXX area_fullscreen();
+			// XXX sa= curarea;
+		}
+	}
+	
+	return sa;
+}
+
+static void imagewindow_init_display_cb(RenderResult *rr)
+{
+	bContext *C= NULL; // XXX
+
+	image_area= imagewindow_set_render_display(C);
+	
+	if(image_area) {
+		SpaceImage *sima= image_area->spacedata.first;
+		
+		// XXX areawinset(image_area->win);
+		
+		/* calc location using original size (tiles don't tell) */
+		sima->centx= (image_area->winx - sima->zoom*(float)rr->rectx)/2.0f;
+		sima->centy= (image_area->winy - sima->zoom*(float)rr->recty)/2.0f;
+		
+		sima->centx-= sima->zoom*sima->xof;
+		sima->centy-= sima->zoom*sima->yof;
+		
+		// XXX drawimagespace(image_area, sima);
+		// XXX if(image_area->headertype) scrarea_do_headdraw(image_area);
+
+		/* no screen_swapbuffers, prevent any other window to draw */
+		// XXX myswapbuffers();
+		
+		// XXX allqueue(REDRAWIMAGE, 0);	/* redraw in end */
+	}
+}
+
+/* coming from BIF_toggle_render_display() */
+void imagewindow_toggle_render(bContext *C)
+{
+	bScreen *sc= CTX_wm_screen(C);
+	ScrArea *sa;
+	
+	/* check if any imagewindow is showing temporal render output */
+	for(sa=sc->areabase.first; sa; sa= sa->next) {
+		if(sa->spacetype==SPACE_IMAGE) {
+			SpaceImage *sima= sa->spacedata.first;
+			
+			if(sima->image && sima->image->type==IMA_TYPE_R_RESULT)
+				if(sima->flag & (SI_PREVSPACE|SI_FULLWINDOW))
+					break;
+		}
+	}
+
+	if(sa) {
+		// XXX addqueue(sa->win, ESCKEY, 1);	/* also returns from fullscreen */
+	}
+	else {
+		sa= imagewindow_set_render_display(C);
+		// XXX scrarea_queue_headredraw(sa);
+		// XXX scrarea_queue_winredraw(sa);
+	}
+}
+
+/* NOTE: called while render, so no malloc allowed! */
+static void imagewindow_renderinfo_cb(RenderStats *rs)
+{
+	if(image_area) {
+		// XXX BIF_make_render_text(rs);
+
+		// XXX sima_draw_render_info(sima, ar);
+		
+		/* no screen_swapbuffers, prevent any other window to draw */
+		// XXX myswapbuffers();
+	}
+}
+
+void imagewindow_render_callbacks(Render *re)
+{
+	RE_display_init_cb(re, imagewindow_init_display_cb);
+	RE_display_draw_cb(re, imagewindow_progress_display_cb);
+	RE_display_clear_cb(re, imagewindow_clear_display_cb);
+	RE_stats_draw_cb(re, imagewindow_renderinfo_cb);	
+}
+