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/**
* $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) 2007 Blender Foundation.
* All rights reserved.
*
*
* Contributor(s): Blender Foundation
*
* ***** END GPL LICENSE BLOCK *****
*/
#include <stdlib.h>
#include <string.h>
#include <GL/glew.h>
#include "DNA_listBase.h"
#include "DNA_screen_types.h"
#include "DNA_windowmanager_types.h"
#include "DNA_userdef_types.h"
#include "MEM_guardedalloc.h"
#include "BLI_blenlib.h"
#include "BKE_context.h"
#include "BKE_global.h"
#include "ED_screen.h"
#include "WM_api.h"
#include "WM_types.h"
#include "wm.h"
#include "wm_window.h"
#include "wm_event_system.h"
/* swap */
#define WIN_NONE_OK 0
#define WIN_BACK_OK 1
#define WIN_FRONT_OK 2
#define WIN_BOTH_OK 3
/* draw method */
#define USER_DRAW_ALL 0
#define USER_DRAW_OVERLAP_ALL 1
#define USER_DRAW_OVERLAP 2
#define USER_DRAW_TRIPLE 3
/* ********************* drawing, swap ****************** */
static void wm_paintcursor_draw(bContext *C)
{
wmWindowManager *wm= CTX_wm_manager(C);
if(wm->paintcursors.first) {
wmWindow *win= CTX_wm_window(C);
wmPaintCursor *pc;
for(pc= wm->paintcursors.first; pc; pc= pc->next) {
if(pc->poll(C)) {
ARegion *ar= CTX_wm_region(C);
pc->draw(C, win->eventstate->x - ar->winrct.xmin, win->eventstate->y - ar->winrct.ymin);
}
}
}
}
/********************** draw all **************************/
/* - reference method, draw all each time */
static void wm_method_draw_all(bContext *C, wmWindow *win)
{
bScreen *screen= win->screen;
ScrArea *sa;
ARegion *ar;
/* draw area regions */
for(sa= screen->areabase.first; sa; sa= sa->next) {
CTX_wm_area_set(C, sa);
for(ar=sa->regionbase.first; ar; ar= ar->next) {
if(ar->swinid) {
CTX_wm_region_set(C, ar);
ED_region_do_draw(C, ar);
if(screen->subwinactive==ar->swinid)
wm_paintcursor_draw(C);
ED_area_overdraw_flush(C, sa, ar);
CTX_wm_region_set(C, NULL);
}
}
CTX_wm_area_set(C, NULL);
}
ED_screen_draw(win);
ED_area_overdraw(C);
/* draw overlapping regions */
for(ar=screen->regionbase.first; ar; ar= ar->next) {
if(ar->swinid) {
CTX_wm_region_set(C, ar);
ED_region_do_draw(C, ar);
CTX_wm_region_set(C, NULL);
}
}
if(screen->do_gesture)
wm_gesture_draw(win);
}
/****************** draw overlap all **********************/
/* - redraw marked areas, and anything that overlaps it */
/* - it also handles swap exchange optionally, assuming */
/* that on swap no clearing happens and we get back the */
/* same buffer as we swapped to the front */
/* - TODO for swap exchange in full screen mode, and then */
/* switching to another window seems to invalidate the */
/* swap flags, probably best to clear then? */
/* mark area-regions to redraw if overlapped with rect */
static void wm_overlap_regions_down(bScreen *screen, rcti *dirty)
{
ScrArea *sa;
ARegion *ar;
for(sa= screen->areabase.first; sa; sa= sa->next) {
for(ar= sa->regionbase.first; ar; ar= ar->next) {
if(BLI_isect_rcti(dirty, &ar->winrct, NULL)) {
ar->do_draw= 1;
ar->swap= WIN_NONE_OK;
}
}
}
}
/* mark menu-regions to redraw if overlapped with rect */
static void wm_overlap_regions_up(bScreen *screen, rcti *dirty)
{
ARegion *ar;
for(ar= screen->regionbase.first; ar; ar= ar->next) {
if(BLI_isect_rcti(dirty, &ar->winrct, NULL)) {
ar->do_draw= 1;
ar->swap= WIN_NONE_OK;
}
}
}
static void wm_method_draw_overlap_all(bContext *C, wmWindow *win)
{
bScreen *screen= win->screen;
ScrArea *sa;
ARegion *ar;
int exchange= (G.f & G_SWAP_EXCHANGE);
/* flush overlapping regions */
if(screen->regionbase.first) {
/* flush redraws of area regions up to overlapping regions */
for(sa= screen->areabase.first; sa; sa= sa->next)
for(ar= sa->regionbase.first; ar; ar= ar->next)
if(ar->swinid && ar->do_draw)
wm_overlap_regions_up(screen, &ar->winrct);
/* flush between overlapping regions */
for(ar= screen->regionbase.last; ar; ar= ar->prev)
if(ar->swinid && ar->do_draw)
wm_overlap_regions_up(screen, &ar->winrct);
/* flush redraws of overlapping regions down to area regions */
for(ar= screen->regionbase.last; ar; ar= ar->prev)
if(ar->swinid && ar->do_draw)
wm_overlap_regions_down(screen, &ar->winrct);
}
/* draw marked area regions */
for(sa= screen->areabase.first; sa; sa= sa->next) {
CTX_wm_area_set(C, sa);
for(ar=sa->regionbase.first; ar; ar= ar->next) {
if(ar->swinid) {
if(ar->do_draw) {
CTX_wm_region_set(C, ar);
ED_region_do_draw(C, ar);
if(screen->subwinactive==ar->swinid)
wm_paintcursor_draw(C);
ED_area_overdraw_flush(C, sa, ar);
CTX_wm_region_set(C, NULL);
if(exchange)
ar->swap= WIN_FRONT_OK;
}
else if(exchange) {
if(ar->swap == WIN_FRONT_OK) {
CTX_wm_region_set(C, ar);
ED_region_do_draw(C, ar);
if(screen->subwinactive==ar->swinid)
wm_paintcursor_draw(C);
ED_area_overdraw_flush(C, sa, ar);
CTX_wm_region_set(C, NULL);
ar->swap= WIN_BOTH_OK;
printf("draws swap exchange %d\n", ar->swinid);
}
else if(ar->swap == WIN_BACK_OK)
ar->swap= WIN_FRONT_OK;
else if(ar->swap == WIN_BOTH_OK)
ar->swap= WIN_BOTH_OK;
}
}
}
CTX_wm_area_set(C, NULL);
}
/* after area regions so we can do area 'overlay' drawing */
if(screen->do_draw) {
ED_screen_draw(win);
if(exchange)
screen->swap= WIN_FRONT_OK;
}
else if(exchange) {
if(screen->swap==WIN_FRONT_OK) {
ED_screen_draw(win);
screen->swap= WIN_BOTH_OK;
}
else if(screen->swap==WIN_BACK_OK)
screen->swap= WIN_FRONT_OK;
else if(screen->swap==WIN_BOTH_OK)
screen->swap= WIN_BOTH_OK;
}
ED_area_overdraw(C);
/* draw marked overlapping regions */
for(ar=screen->regionbase.first; ar; ar= ar->next) {
if(ar->swinid && ar->do_draw) {
CTX_wm_region_set(C, ar);
ED_region_do_draw(C, ar);
CTX_wm_region_set(C, NULL);
}
}
if(screen->do_gesture)
wm_gesture_draw(win);
}
/******************** draw overlap ************************/
/* - not implemented */
static void wm_method_draw_overlap(bContext *C, wmWindow *win)
{
wm_method_draw_all(C, win);
}
/****************** draw triple buffer ********************/
/* - area regions are written into a texture, without any */
/* of the overlapping menus, brushes, gestures. these */
/* are redrawn each time. */
/* - work in progress still .. */
/* - TODO glDeleteTextures .. */
/* - TODO handle window resize */
/* - TODO avoid region redraw for brush and gestures.. */
/* - TODO use multiple smaller textures for cards without */
/* non power of two support */
static int is_pow2(int n)
{
return ((n)&(n-1))==0;
}
static int larger_pow2(int n)
{
if (is_pow2(n))
return n;
while(!is_pow2(n))
n= n&(n-1);
return n*2;
}
static void wm_method_draw_triple(bContext *C, wmWindow *win)
{
wmWindowManager *wm= CTX_wm_manager(C);
bScreen *screen= win->screen;
ScrArea *sa;
ARegion *ar;
float halfx, halfy, ratiox, ratioy;
int copytex= 0;
if(win->drawtex) {
glClearColor(0, 0, 0, 0);
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
wmSubWindowSet(win, screen->mainwin);
/* wmOrtho for the screen has this same offset */
ratiox= win->sizex/(float)win->drawtexw;
ratioy= win->sizey/(float)win->drawtexh;
halfx= 0.375f/win->drawtexw;
halfy= 0.375f/win->drawtexh;
glBindTexture(GL_TEXTURE_2D, win->drawtex);
glEnable(GL_TEXTURE_2D);
glColor3f(1.0f, 1.0f, 1.0f);
glBegin(GL_QUADS);
glTexCoord2f(halfx, halfy);
glVertex2f(0.0f, 0.0f);
glTexCoord2f(ratiox+halfx, halfy);
glVertex2f(win->sizex, 0.0f);
glTexCoord2f(ratiox+halfx, ratioy+halfy);
glVertex2f(win->sizex, win->sizey);
glTexCoord2f(halfx, ratioy+halfy);
glVertex2f(0.0f, win->sizey);
glEnd();
glDisable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, 0);
}
else {
GLint format;
glGenTextures(1, (GLuint *)&win->drawtex);
if(!win->drawtex) {
/* not the typical failure case but we handle it anyway */
win->drawmethod= USER_DRAW_OVERLAP_ALL;
wm_method_draw_overlap_all(C, win);
printf("failed to allocate texture for triple buffer drawing (generate).\n");
return;
}
win->drawtexw= win->sizex;
win->drawtexh= win->sizey;
if(!GLEW_ARB_texture_non_power_of_two) {
win->drawtexw= larger_pow2(win->drawtexw);
win->drawtexh= larger_pow2(win->drawtexh);
}
glTexImage2D(GL_PROXY_TEXTURE_2D, 0, GL_RGB8, win->drawtexw, win->drawtexh, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
glGetTexLevelParameteriv(GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT, &format);
if(format != GL_RGB8) {
/* proxy texture is only guaranteed to test for the cases that
* there is only one texture in use, which may not be the case */
glDeleteTextures(1, (GLuint *)&win->drawtex);
win->drawmethod= USER_DRAW_OVERLAP_ALL;
wm_method_draw_overlap_all(C, win);
printf("failed to allocate texture for triple buffer drawing (proxy test).\n");
return;
}
glBindTexture(GL_TEXTURE_2D, win->drawtex);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, win->drawtexw, win->drawtexh, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glBindTexture(GL_TEXTURE_2D, 0);
if(glGetError() == GL_OUT_OF_MEMORY) {
/* not sure if this works everywhere .. */
glDeleteTextures(1, (GLuint *)&win->drawtex);
win->drawmethod= USER_DRAW_OVERLAP_ALL;
wm_method_draw_overlap_all(C, win);
printf("failed to allocate texture for triple buffer drawing (out of memory).\n");
return;
}
}
/* draw marked area regions */
for(sa= screen->areabase.first; sa; sa= sa->next) {
CTX_wm_area_set(C, sa);
for(ar=sa->regionbase.first; ar; ar= ar->next) {
if(ar->swinid && ar->do_draw) {
CTX_wm_region_set(C, ar);
ED_region_do_draw(C, ar);
CTX_wm_region_set(C, NULL);
copytex= 1;
}
}
CTX_wm_area_set(C, NULL);
}
if(copytex) {
wmSubWindowSet(win, screen->mainwin);
ED_area_overdraw(C);
glBindTexture(GL_TEXTURE_2D, win->drawtex);
glReadBuffer(GL_BACK);
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, win->sizex, win->sizey);
glBindTexture(GL_TEXTURE_2D, 0);
}
/* after area regions so we can do area 'overlay' drawing */
ED_screen_draw(win);
/* draw overlapping regions */
for(ar=screen->regionbase.first; ar; ar= ar->next) {
if(ar->swinid) {
CTX_wm_region_set(C, ar);
ED_region_do_draw(C, ar);
CTX_wm_region_set(C, NULL);
}
}
if(win->screen->do_gesture)
wm_gesture_draw(win);
if(wm->paintcursors.first) {
for(sa= screen->areabase.first; sa; sa= sa->next) {
for(ar=sa->regionbase.first; ar; ar= ar->next) {
if(ar->swinid == screen->subwinactive) {
CTX_wm_area_set(C, sa);
CTX_wm_region_set(C, ar);
wmSubWindowSet(win, ar->swinid);
ED_region_pixelspace(ar);
wm_paintcursor_draw(C);
CTX_wm_region_set(C, NULL);
CTX_wm_area_set(C, NULL);
}
}
}
wmSubWindowSet(win, screen->mainwin);
}
}
/****************** main update call **********************/
/* quick test to prevent changing window drawable */
static int wm_draw_update_test_window(wmWindow *win)
{
ScrArea *sa;
ARegion *ar;
if(win->screen->do_refresh)
return 1;
if(win->screen->do_draw)
return 1;
if(win->screen->do_gesture)
return 1;
for(ar= win->screen->regionbase.first; ar; ar= ar->next)
if(ar->swinid && ar->do_draw)
return 1;
for(sa= win->screen->areabase.first; sa; sa= sa->next)
for(ar=sa->regionbase.first; ar; ar= ar->next)
if(ar->swinid && ar->do_draw)
return 1;
return 0;
}
void wm_draw_update(bContext *C)
{
wmWindowManager *wm= CTX_wm_manager(C);
wmWindow *win;
for(win= wm->windows.first; win; win= win->next) {
win->drawmethod= USER_DRAW_OVERLAP_ALL;
if(wm_draw_update_test_window(win)) {
CTX_wm_window_set(C, win);
/* sets context window+screen */
wm_window_make_drawable(C, win);
/* notifiers for screen redraw */
if(win->screen->do_refresh)
ED_screen_refresh(wm, win);
if(win->drawmethod == USER_DRAW_ALL)
wm_method_draw_all(C, win);
else if(win->drawmethod == USER_DRAW_OVERLAP_ALL)
wm_method_draw_overlap_all(C, win);
else if(win->drawmethod == USER_DRAW_OVERLAP)
wm_method_draw_overlap(C, win);
else if(win->drawmethod == USER_DRAW_TRIPLE)
wm_method_draw_triple(C, win);
wm_window_swap_buffers(win);
CTX_wm_window_set(C, NULL);
}
}
}
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