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blender-archive/source/blender/editors/space_node/node_draw.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.
*
* The Original Code is: all of this file.
* Contributor(s): Nathan Letwory
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/editors/space_node/node_draw.c
* \ingroup spnode
* \brief higher level node drawing for the node editor.
*/
#include "DNA_lamp_types.h"
#include "DNA_node_types.h"
#include "DNA_material_types.h"
#include "DNA_object_types.h"
#include "DNA_screen_types.h"
#include "DNA_space_types.h"
#include "DNA_texture_types.h"
#include "DNA_world_types.h"
#include "BLI_math.h"
#include "BLI_blenlib.h"
#include "BLF_translation.h"
#include "BKE_context.h"
#include "BKE_depsgraph.h"
#include "BKE_main.h"
#include "BKE_node.h"
#include "BLF_api.h"
#include "BIF_gl.h"
#include "BIF_glutil.h"
#include "WM_api.h"
#include "WM_types.h"
#include "ED_node.h"
#include "ED_gpencil.h"
#include "ED_screen.h"
#include "ED_space_api.h"
#include "UI_resources.h"
#include "UI_view2d.h"
#include "RNA_access.h"
#include "node_intern.h" /* own include */
#include "COM_compositor.h"
/* XXX interface.h */
extern void ui_dropshadow(const rctf *rct, float radius, float aspect, float alpha, int select);
float ED_node_grid_size(void)
{
return U.widget_unit;
}
void ED_node_tree_update(const bContext *C)
{
SpaceNode *snode = CTX_wm_space_node(C);
if (snode) {
snode_set_context(C);
if (snode->nodetree && snode->nodetree->id.us == 0) {
snode->nodetree->id.us = 1;
}
}
}
/* id is supposed to contain a node tree */
static bNodeTree *node_tree_from_ID(ID *id)
{
if (id) {
short idtype = GS(id->name);
switch (idtype) {
case ID_NT:
return (bNodeTree *)id;
case ID_MA:
return ((Material *)id)->nodetree;
case ID_LA:
return ((Lamp *)id)->nodetree;
case ID_WO:
return ((World *)id)->nodetree;
case ID_SCE:
return ((Scene *)id)->nodetree;
case ID_TE:
return ((Tex *)id)->nodetree;
}
}
return NULL;
}
void ED_node_tag_update_id(ID *id)
{
bNodeTree *ntree = node_tree_from_ID(id);
if (id == NULL || ntree == NULL)
return;
if (ntree->type == NTREE_SHADER) {
DAG_id_tag_update(id, 0);
if (GS(id->name) == ID_MA)
WM_main_add_notifier(NC_MATERIAL | ND_SHADING, id);
else if (GS(id->name) == ID_LA)
WM_main_add_notifier(NC_LAMP | ND_LIGHTING, id);
else if (GS(id->name) == ID_WO)
WM_main_add_notifier(NC_WORLD | ND_WORLD, id);
}
else if (ntree->type == NTREE_COMPOSIT) {
WM_main_add_notifier(NC_SCENE | ND_NODES, id);
}
else if (ntree->type == NTREE_TEXTURE) {
DAG_id_tag_update(id, 0);
WM_main_add_notifier(NC_TEXTURE | ND_NODES, id);
}
}
void ED_node_tag_update_nodetree(Main *bmain, bNodeTree *ntree)
{
if (!ntree)
return;
/* look through all datablocks, to support groups */
FOREACH_NODETREE(bmain, tntree, id) {
/* check if nodetree uses the group */
if (ntreeHasTree(tntree, ntree))
ED_node_tag_update_id(id);
} FOREACH_NODETREE_END
if (ntree->type == NTREE_TEXTURE)
ntreeTexCheckCyclics(ntree);
}
static int compare_nodes(bNode *a, bNode *b)
{
bNode *parent;
/* These tell if either the node or any of the parent nodes is selected.
* A selected parent means an unselected node is also in foreground!
*/
int a_select = (a->flag & NODE_SELECT), b_select = (b->flag & NODE_SELECT);
int a_active = (a->flag & NODE_ACTIVE), b_active = (b->flag & NODE_ACTIVE);
/* if one is an ancestor of the other */
/* XXX there might be a better sorting algorithm for stable topological sort, this is O(n^2) worst case */
for (parent = a->parent; parent; parent = parent->parent) {
/* if b is an ancestor, it is always behind a */
if (parent == b)
return 1;
/* any selected ancestor moves the node forward */
if (parent->flag & NODE_ACTIVE)
a_active = 1;
if (parent->flag & NODE_SELECT)
a_select = 1;
}
for (parent = b->parent; parent; parent = parent->parent) {
/* if a is an ancestor, it is always behind b */
if (parent == a)
return 0;
/* any selected ancestor moves the node forward */
if (parent->flag & NODE_ACTIVE)
b_active = 1;
if (parent->flag & NODE_SELECT)
b_select = 1;
}
/* if one of the nodes is in the background and the other not */
if ((a->flag & NODE_BACKGROUND) && !(b->flag & NODE_BACKGROUND))
return 0;
else if (!(a->flag & NODE_BACKGROUND) && (b->flag & NODE_BACKGROUND))
return 1;
/* if one has a higher selection state (active > selected > nothing) */
if (!b_active && a_active)
return 1;
else if (!b_select && (a_active || a_select))
return 1;
return 0;
}
/* Sorts nodes by selection: unselected nodes first, then selected,
* then the active node at the very end. Relative order is kept intact!
*/
void ED_node_sort(bNodeTree *ntree)
{
/* merge sort is the algorithm of choice here */
bNode *first_a, *first_b, *node_a, *node_b, *tmp;
int totnodes = BLI_countlist(&ntree->nodes);
int k, a, b;
k = 1;
while (k < totnodes) {
first_a = first_b = ntree->nodes.first;
do {
/* setup first_b pointer */
for (b = 0; b < k && first_b; ++b) {
first_b = first_b->next;
}
/* all batches merged? */
if (first_b == NULL)
break;
/* merge batches */
node_a = first_a;
node_b = first_b;
a = b = 0;
while (a < k && b < k && node_b) {
if (compare_nodes(node_a, node_b) == 0) {
node_a = node_a->next;
a++;
}
else {
tmp = node_b;
node_b = node_b->next;
b++;
BLI_remlink(&ntree->nodes, tmp);
BLI_insertlinkbefore(&ntree->nodes, node_a, tmp);
}
}
/* setup first pointers for next batch */
first_b = node_b;
for (; b < k; ++b) {
/* all nodes sorted? */
if (first_b == NULL)
break;
first_b = first_b->next;
}
first_a = first_b;
} while (first_b);
k = k << 1;
}
}
static void do_node_internal_buttons(bContext *C, void *UNUSED(node_v), int event)
{
if (event == B_NODE_EXEC) {
SpaceNode *snode = CTX_wm_space_node(C);
if (snode && snode->id)
ED_node_tag_update_id(snode->id);
}
}
static void node_uiblocks_init(const bContext *C, bNodeTree *ntree)
{
bNode *node;
char uiblockstr[32];
/* add node uiBlocks in drawing order - prevents events going to overlapping nodes */
for (node = ntree->nodes.first; node; node = node->next) {
/* ui block */
BLI_snprintf(uiblockstr, sizeof(uiblockstr), "node buttons %p", (void *)node);
node->block = uiBeginBlock(C, CTX_wm_region(C), uiblockstr, UI_EMBOSS);
uiBlockSetHandleFunc(node->block, do_node_internal_buttons, node);
/* this cancels events for background nodes */
uiBlockSetFlag(node->block, UI_BLOCK_CLIP_EVENTS);
}
}
void node_to_view(struct bNode *node, float x, float y, float *rx, float *ry)
{
nodeToView(node, x, y, rx, ry);
*rx *= UI_DPI_FAC;
*ry *= UI_DPI_FAC;
}
void node_from_view(struct bNode *node, float x, float y, float *rx, float *ry)
{
x /= UI_DPI_FAC;
y /= UI_DPI_FAC;
nodeFromView(node, x, y, rx, ry);
}
/* based on settings in node, sets drawing rect info. each redraw! */
static void node_update_basis(const bContext *C, bNodeTree *ntree, bNode *node)
{
uiLayout *layout, *row;
PointerRNA nodeptr, sockptr;
bNodeSocket *nsock;
float locx, locy;
float dy;
int buty;
RNA_pointer_create(&ntree->id, &RNA_Node, node, &nodeptr);
/* get "global" coords */
node_to_view(node, 0.0f, 0.0f, &locx, &locy);
dy = locy;
/* header */
dy -= NODE_DY;
/* little bit space in top */
if (node->outputs.first)
dy -= NODE_DYS / 2;
/* output sockets */
for (nsock = node->outputs.first; nsock; nsock = nsock->next) {
if (nodeSocketIsHidden(nsock))
continue;
RNA_pointer_create(&ntree->id, &RNA_NodeSocket, nsock, &sockptr);
layout = uiBlockLayout(node->block, UI_LAYOUT_VERTICAL, UI_LAYOUT_PANEL,
locx + NODE_DYS, dy, NODE_WIDTH(node) - NODE_DY, NODE_DY, 0, UI_GetStyle());
/* context pointers for current node and socket */
uiLayoutSetContextPointer(layout, "node", &nodeptr);
uiLayoutSetContextPointer(layout, "socket", &sockptr);
/* align output buttons to the right */
row = uiLayoutRow(layout, 1);
uiLayoutSetAlignment(row, UI_LAYOUT_ALIGN_RIGHT);
nsock->typeinfo->draw((bContext *)C, row, &sockptr, &nodeptr, IFACE_(nsock->name));
uiBlockEndAlign(node->block);
uiBlockLayoutResolve(node->block, NULL, &buty);
/* ensure minimum socket height in case layout is empty */
buty = min_ii(buty, dy - NODE_DY);
nsock->locx = locx + NODE_WIDTH(node);
/* place the socket circle in the middle of the layout */
nsock->locy = 0.5f * (dy + buty);
dy = buty;
if (nsock->next)
dy -= NODE_SOCKDY;
}
node->prvr.xmin = locx + NODE_DYS;
node->prvr.xmax = locx + NODE_WIDTH(node) - NODE_DYS;
/* preview rect? */
if (node->flag & NODE_PREVIEW) {
float aspect = 1.0f;
if (node->preview_xsize && node->preview_ysize)
aspect = (float)node->preview_ysize / (float)node->preview_xsize;
dy -= NODE_DYS / 2;
node->prvr.ymax = dy;
if (aspect <= 1.0f)
node->prvr.ymin = dy - aspect * (NODE_WIDTH(node) - NODE_DY);
else {
/* width correction of image */
/* XXX huh? (ton) */
float dx = (NODE_WIDTH(node) - NODE_DYS) - (NODE_WIDTH(node) - NODE_DYS) / aspect;
node->prvr.ymin = dy - (NODE_WIDTH(node) - NODE_DY);
node->prvr.xmin += 0.5f * dx;
node->prvr.xmax -= 0.5f * dx;
}
dy = node->prvr.ymin - NODE_DYS / 2;
/* make sure that maximums are bigger or equal to minimums */
if (node->prvr.xmax < node->prvr.xmin) SWAP(float, node->prvr.xmax, node->prvr.xmin);
if (node->prvr.ymax < node->prvr.ymin) SWAP(float, node->prvr.ymax, node->prvr.ymin);
}
/* buttons rect? */
if (node->typeinfo->draw_buttons && (node->flag & NODE_OPTIONS)) {
dy -= NODE_DYS / 2;
/* set this for uifunc() that don't use layout engine yet */
node->butr.xmin = 0;
node->butr.xmax = NODE_WIDTH(node) - 2 * NODE_DYS;
node->butr.ymin = 0;
node->butr.ymax = 0;
layout = uiBlockLayout(node->block, UI_LAYOUT_VERTICAL, UI_LAYOUT_PANEL,
locx + NODE_DYS, dy, node->butr.xmax, 0, 0, UI_GetStyle());
uiLayoutSetContextPointer(layout, "node", &nodeptr);
node->typeinfo->draw_buttons(layout, (bContext *)C, &nodeptr);
uiBlockEndAlign(node->block);
uiBlockLayoutResolve(node->block, NULL, &buty);
dy = buty - NODE_DYS / 2;
}
/* input sockets */
for (nsock = node->inputs.first; nsock; nsock = nsock->next) {
if (nodeSocketIsHidden(nsock))
continue;
RNA_pointer_create(&ntree->id, &RNA_NodeSocket, nsock, &sockptr);
layout = uiBlockLayout(node->block, UI_LAYOUT_VERTICAL, UI_LAYOUT_PANEL,
locx + NODE_DYS, dy, NODE_WIDTH(node) - NODE_DY, NODE_DY, 0, UI_GetStyle());
/* context pointers for current node and socket */
uiLayoutSetContextPointer(layout, "node", &nodeptr);
uiLayoutSetContextPointer(layout, "socket", &sockptr);
row = uiLayoutRow(layout, 1);
nsock->typeinfo->draw((bContext *)C, row, &sockptr, &nodeptr, IFACE_(nsock->name));
uiBlockEndAlign(node->block);
uiBlockLayoutResolve(node->block, NULL, &buty);
/* ensure minimum socket height in case layout is empty */
buty = min_ii(buty, dy - NODE_DY);
nsock->locx = locx;
/* place the socket circle in the middle of the layout */
nsock->locy = 0.5f * (dy + buty);
dy = buty;
if (nsock->next)
dy -= NODE_SOCKDY;
}
/* little bit space in end */
if (node->inputs.first || (node->flag & (NODE_OPTIONS | NODE_PREVIEW)) == 0)
dy -= NODE_DYS / 2;
node->totr.xmin = locx;
node->totr.xmax = locx + NODE_WIDTH(node);
node->totr.ymax = locy;
node->totr.ymin = min_ff(dy, locy - 2 * NODE_DY);
/* Set the block bounds to clip mouse events from underlying nodes.
* Add a margin for sockets on each side.
*/
uiExplicitBoundsBlock(node->block,
node->totr.xmin - NODE_SOCKSIZE,
node->totr.ymin,
node->totr.xmax + NODE_SOCKSIZE,
node->totr.ymax);
}
/* based on settings in node, sets drawing rect info. each redraw! */
static void node_update_hidden(bNode *node)
{
bNodeSocket *nsock;
float locx, locy;
float rad, drad, hiddenrad = HIDDEN_RAD;
int totin = 0, totout = 0, tot;
/* get "global" coords */
node_to_view(node, 0.0f, 0.0f, &locx, &locy);
/* calculate minimal radius */
for (nsock = node->inputs.first; nsock; nsock = nsock->next)
if (!nodeSocketIsHidden(nsock))
totin++;
for (nsock = node->outputs.first; nsock; nsock = nsock->next)
if (!nodeSocketIsHidden(nsock))
totout++;
tot = MAX2(totin, totout);
if (tot > 4) {
hiddenrad += 5.0f * (float)(tot - 4);
}
node->totr.xmin = locx;
node->totr.xmax = locx + 3 * hiddenrad + node->miniwidth;
node->totr.ymax = locy + (hiddenrad - 0.5f * NODE_DY);
node->totr.ymin = node->totr.ymax - 2 * hiddenrad;
/* output sockets */
rad = drad = (float)M_PI / (1.0f + (float)totout);
for (nsock = node->outputs.first; nsock; nsock = nsock->next) {
if (!nodeSocketIsHidden(nsock)) {
nsock->locx = node->totr.xmax - hiddenrad + sinf(rad) * hiddenrad;
nsock->locy = node->totr.ymin + hiddenrad + cosf(rad) * hiddenrad;
rad += drad;
}
}
/* input sockets */
rad = drad = -(float)M_PI / (1.0f + (float)totin);
for (nsock = node->inputs.first; nsock; nsock = nsock->next) {
if (!nodeSocketIsHidden(nsock)) {
nsock->locx = node->totr.xmin + hiddenrad + sinf(rad) * hiddenrad;
nsock->locy = node->totr.ymin + hiddenrad + cosf(rad) * hiddenrad;
rad += drad;
}
}
/* Set the block bounds to clip mouse events from underlying nodes.
* Add a margin for sockets on each side.
*/
uiExplicitBoundsBlock(node->block,
node->totr.xmin - NODE_SOCKSIZE,
node->totr.ymin,
node->totr.xmax + NODE_SOCKSIZE,
node->totr.ymax);
}
void node_update_default(const bContext *C, bNodeTree *ntree, bNode *node)
{
if (node->flag & NODE_HIDDEN)
node_update_hidden(node);
else
node_update_basis(C, ntree, node);
}
int node_select_area_default(bNode *node, int x, int y)
{
return BLI_rctf_isect_pt(&node->totr, x, y);
}
int node_tweak_area_default(bNode *node, int x, int y)
{
return BLI_rctf_isect_pt(&node->totr, x, y);
}
int node_get_colorid(bNode *node)
{
switch (node->typeinfo->nclass) {
case NODE_CLASS_INPUT: return TH_NODE_INPUT;
case NODE_CLASS_OUTPUT: return (node->flag & NODE_DO_OUTPUT) ? TH_NODE_OUTPUT : TH_NODE;
case NODE_CLASS_CONVERTOR: return TH_NODE_CONVERTOR;
case NODE_CLASS_OP_COLOR: return TH_NODE_COLOR;
case NODE_CLASS_OP_VECTOR: return TH_NODE_VECTOR;
case NODE_CLASS_OP_FILTER: return TH_NODE_FILTER;
case NODE_CLASS_GROUP: return TH_NODE_GROUP;
case NODE_CLASS_INTERFACE: return TH_NODE_INTERFACE;
case NODE_CLASS_MATTE: return TH_NODE_MATTE;
case NODE_CLASS_DISTORT: return TH_NODE_DISTORT;
case NODE_CLASS_TEXTURE: return TH_NODE_TEXTURE;
case NODE_CLASS_SHADER: return TH_NODE_SHADER;
case NODE_CLASS_SCRIPT: return TH_NODE_SCRIPT;
case NODE_CLASS_PATTERN: return TH_NODE_PATTERN;
case NODE_CLASS_LAYOUT: return TH_NODE_LAYOUT;
default: return TH_NODE;
}
}
/* note: in cmp_util.c is similar code, for node_compo_pass_on()
* the same goes for shader and texture nodes. */
/* note: in node_edit.c is similar code, for untangle node */
static void node_draw_mute_line(View2D *v2d, SpaceNode *snode, bNode *node)
{
bNodeLink *link;
glEnable(GL_BLEND);
glEnable(GL_LINE_SMOOTH);
for (link = node->internal_links.first; link; link = link->next)
node_draw_link_bezier(v2d, snode, link, TH_REDALERT, 0, TH_WIRE, 0, TH_WIRE);
glDisable(GL_BLEND);
glDisable(GL_LINE_SMOOTH);
}
/* this might have some more generic use */
static void node_circle_draw(float x, float y, float size, const float col[4], int highlight)
{
/* 16 values of sin function */
static float si[16] = {
0.00000000f, 0.39435585f, 0.72479278f, 0.93775213f,
0.99871650f, 0.89780453f, 0.65137248f, 0.29936312f,
-0.10116832f, -0.48530196f, -0.79077573f, -0.96807711f,
-0.98846832f, -0.84864425f, -0.57126821f, -0.20129852f
};
/* 16 values of cos function */
static float co[16] = {
1.00000000f, 0.91895781f, 0.68896691f, 0.34730525f,
-0.05064916f, -0.44039415f, -0.75875812f, -0.95413925f,
-0.99486932f, -0.87434661f, -0.61210598f, -0.25065253f,
0.15142777f, 0.52896401f, 0.82076344f, 0.97952994f,
};
int a;
glColor4fv(col);
glEnable(GL_BLEND);
glBegin(GL_POLYGON);
for (a = 0; a < 16; a++)
glVertex2f(x + size * si[a], y + size * co[a]);
glEnd();
glDisable(GL_BLEND);
if (highlight) {
UI_ThemeColor(TH_TEXT_HI);
glLineWidth(1.5f);
}
else {
glColor4ub(0, 0, 0, 150);
}
glEnable(GL_BLEND);
glEnable(GL_LINE_SMOOTH);
glBegin(GL_LINE_LOOP);
for (a = 0; a < 16; a++)
glVertex2f(x + size * si[a], y + size * co[a]);
glEnd();
glDisable(GL_LINE_SMOOTH);
glDisable(GL_BLEND);
glLineWidth(1.0f);
}
void node_socket_circle_draw(const bContext *C, bNodeTree *ntree, bNode *node, bNodeSocket *sock, float size, int highlight)
{
PointerRNA ptr, node_ptr;
float color[4];
RNA_pointer_create((ID *)ntree, &RNA_NodeSocket, sock, &ptr);
RNA_pointer_create((ID *)ntree, &RNA_Node, node, &node_ptr);
sock->typeinfo->draw_color((bContext *)C, &ptr, &node_ptr, color);
node_circle_draw(sock->locx, sock->locy, size, color, highlight);
}
/* ************** Socket callbacks *********** */
static void node_draw_preview_background(float tile, rctf *rect)
{
float x, y;
/* draw checkerboard backdrop to show alpha */
glColor3ub(120, 120, 120);
glRectf(rect->xmin, rect->ymin, rect->xmax, rect->ymax);
glColor3ub(160, 160, 160);
for (y = rect->ymin; y < rect->ymax; y += tile * 2) {
for (x = rect->xmin; x < rect->xmax; x += tile * 2) {
float tilex = tile, tiley = tile;
if (x + tile > rect->xmax)
tilex = rect->xmax - x;
if (y + tile > rect->ymax)
tiley = rect->ymax - y;
glRectf(x, y, x + tilex, y + tiley);
}
}
for (y = rect->ymin + tile; y < rect->ymax; y += tile * 2) {
for (x = rect->xmin + tile; x < rect->xmax; x += tile * 2) {
float tilex = tile, tiley = tile;
if (x + tile > rect->xmax)
tilex = rect->xmax - x;
if (y + tile > rect->ymax)
tiley = rect->ymax - y;
glRectf(x, y, x + tilex, y + tiley);
}
}
}
/* not a callback */
static void node_draw_preview(bNodePreview *preview, rctf *prv)
{
float xrect = BLI_rctf_size_x(prv);
float yrect = BLI_rctf_size_y(prv);
float xscale = xrect / ((float)preview->xsize);
float yscale = yrect / ((float)preview->ysize);
float scale;
rctf draw_rect;
/* uniform scale and offset */
draw_rect = *prv;
if (xscale < yscale) {
float offset = 0.5f * (yrect - ((float)preview->ysize) * xscale);
draw_rect.ymin += offset;
draw_rect.ymax -= offset;
scale = xscale;
}
else {
float offset = 0.5f * (xrect - ((float)preview->xsize) * yscale);
draw_rect.xmin += offset;
draw_rect.xmax -= offset;
scale = yscale;
}
node_draw_preview_background(BLI_rctf_size_x(prv) / 10.0f, &draw_rect);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); /* premul graphics */
glColor4f(1.0, 1.0, 1.0, 1.0);
glPixelZoom(scale, scale);
glaDrawPixelsTex(draw_rect.xmin, draw_rect.ymin, preview->xsize, preview->ysize, GL_RGBA, GL_UNSIGNED_BYTE, GL_LINEAR, preview->rect);
glPixelZoom(1.0f, 1.0f);
glDisable(GL_BLEND);
UI_ThemeColorShadeAlpha(TH_BACK, -15, +100);
fdrawbox(draw_rect.xmin, draw_rect.ymin, draw_rect.xmax, draw_rect.ymax);
}
/* common handle function for operator buttons that need to select the node first */
static void node_toggle_button_cb(struct bContext *C, void *node_argv, void *op_argv)
{
bNode *node = (bNode *)node_argv;
const char *opname = (const char *)op_argv;
/* select & activate only the button's node */
node_select_single(C, node);
WM_operator_name_call(C, opname, WM_OP_INVOKE_DEFAULT, NULL);
}
void node_draw_shadow(SpaceNode *snode, bNode *node, float radius, float alpha)
{
rctf *rct = &node->totr;
uiSetRoundBox(UI_CNR_ALL);
if (node->parent == NULL)
ui_dropshadow(rct, radius, snode->aspect, alpha, node->flag & SELECT);
else {
const float margin = 3.0f;
glColor4f(0.0f, 0.0f, 0.0f, 0.33f);
glEnable(GL_BLEND);
uiRoundBox(rct->xmin - margin, rct->ymin - margin,
rct->xmax + margin, rct->ymax + margin, radius + margin);
glDisable(GL_BLEND);
}
}
static void node_draw_basis(const bContext *C, ARegion *ar, SpaceNode *snode, bNodeTree *ntree, bNode *node, bNodeInstanceKey key)
{
bNodeInstanceHash *previews = CTX_data_pointer_get(C, "node_previews").data;
bNodeSocket *sock;
rctf *rct = &node->totr;
float iconofs;
/* float socket_size = NODE_SOCKSIZE*U.dpi/72; */ /* UNUSED */
float iconbutw = 0.8f * UI_UNIT_X;
int color_id = node_get_colorid(node);
char showname[128]; /* 128 used below */
View2D *v2d = &ar->v2d;
/* XXX hack: copy values from linked ID data where displayed as sockets */
if (node->block)
nodeSynchronizeID(node, false);
/* skip if out of view */
if (BLI_rctf_isect(&node->totr, &ar->v2d.cur, NULL) == false) {
uiEndBlock(C, node->block);
node->block = NULL;
return;
}
/* shadow */
node_draw_shadow(snode, node, BASIS_RAD, 1.0f);
/* header uses color from backdrop, but we make it opaqie */
if (color_id == TH_NODE) {
float col[3];
UI_GetThemeColorShade3fv(color_id, -20, col);
glColor4f(col[0], col[1], col[2], 1.0f);
}
else
UI_ThemeColor(color_id);
if (node->flag & NODE_MUTED)
UI_ThemeColorBlend(color_id, TH_REDALERT, 0.5f);
#ifdef WITH_COMPOSITOR
if (ntree->type == NTREE_COMPOSIT && (snode->flag & SNODE_SHOW_HIGHLIGHT)) {
if (COM_isHighlightedbNode(node)) {
UI_ThemeColorBlend(color_id, TH_ACTIVE, 0.5f);
}
}
#endif
uiSetRoundBox(UI_CNR_TOP_LEFT | UI_CNR_TOP_RIGHT);
uiRoundBox(rct->xmin, rct->ymax - NODE_DY, rct->xmax, rct->ymax, BASIS_RAD);
/* show/hide icons */
iconofs = rct->xmax - 0.35f * U.widget_unit;
/* preview */
if (node->typeinfo->flag & NODE_PREVIEW) {
uiBut *but;
iconofs -= iconbutw;
uiBlockSetEmboss(node->block, UI_EMBOSSN);
but = uiDefIconBut(node->block, TOGBUT, B_REDR, ICON_MATERIAL,
iconofs, rct->ymax - NODE_DY, iconbutw, UI_UNIT_Y, NULL, 0, 0, 0, 0, "");
uiButSetFunc(but, node_toggle_button_cb, node, (void *)"NODE_OT_preview_toggle");
/* XXX this does not work when node is activated and the operator called right afterwards,
* since active ID is not updated yet (needs to process the notifier).
* This can only work as visual indicator!
*/
// if (!(node->flag & (NODE_ACTIVE_ID|NODE_DO_OUTPUT)))
// uiButSetFlag(but, UI_BUT_DISABLED);
uiBlockSetEmboss(node->block, UI_EMBOSS);
}
/* group edit */
if (node->type == NODE_GROUP) {
uiBut *but;
iconofs -= iconbutw;
uiBlockSetEmboss(node->block, UI_EMBOSSN);
but = uiDefIconBut(node->block, TOGBUT, B_REDR, ICON_NODETREE,
iconofs, rct->ymax - NODE_DY, iconbutw, UI_UNIT_Y, NULL, 0, 0, 0, 0, "");
uiButSetFunc(but, node_toggle_button_cb, node, (void *)"NODE_OT_group_edit");
uiBlockSetEmboss(node->block, UI_EMBOSS);
}
/* title */
if (node->flag & SELECT)
UI_ThemeColor(TH_SELECT);
else
UI_ThemeColorBlendShade(TH_TEXT, color_id, 0.4f, 10);
/* open/close entirely? */
{
uiBut *but;
int but_size = UI_UNIT_X * 0.6f;
/* XXX button uses a custom triangle draw below, so make it invisible without icon */
uiBlockSetEmboss(node->block, UI_EMBOSSN);
but = uiDefBut(node->block, TOGBUT, B_REDR, "",
rct->xmin + 0.5f * U.widget_unit - but_size / 2, rct->ymax - NODE_DY / 2.0f - but_size / 2,
but_size, but_size, NULL, 0, 0, 0, 0, "");
uiButSetFunc(but, node_toggle_button_cb, node, (void *)"NODE_OT_hide_toggle");
uiBlockSetEmboss(node->block, UI_EMBOSS);
/* custom draw function for this button */
UI_DrawTriIcon(rct->xmin + 0.5f * U.widget_unit, rct->ymax - NODE_DY / 2.0f, 'v');
}
/* this isn't doing anything for the label, so commenting out */
#if 0
if (node->flag & SELECT)
UI_ThemeColor(TH_TEXT_HI);
else
UI_ThemeColor(TH_TEXT);
#endif
nodeLabel(ntree, node, showname, sizeof(showname));
//if (node->flag & NODE_MUTED)
// BLI_snprintf(showname, sizeof(showname), "[%s]", showname); /* XXX - don't print into self! */
uiDefBut(node->block, LABEL, 0, showname,
(int)(rct->xmin + (NODE_MARGIN_X)), (int)(rct->ymax - NODE_DY),
(short)(iconofs - rct->xmin - 18.0f), (short)NODE_DY,
NULL, 0, 0, 0, 0, "");
/* body */
if (!nodeIsRegistered(node))
UI_ThemeColor4(TH_REDALERT); /* use warning color to indicate undefined types */
else if (node->flag & NODE_CUSTOM_COLOR)
glColor3fv(node->color);
else
UI_ThemeColor4(TH_NODE);
glEnable(GL_BLEND);
uiSetRoundBox(UI_CNR_BOTTOM_LEFT | UI_CNR_BOTTOM_RIGHT);
uiRoundBox(rct->xmin, rct->ymin, rct->xmax, rct->ymax - NODE_DY, BASIS_RAD);
glDisable(GL_BLEND);
/* outline active and selected emphasis */
if (node->flag & SELECT) {
glEnable(GL_BLEND);
glEnable(GL_LINE_SMOOTH);
if (node->flag & NODE_ACTIVE)
UI_ThemeColorShadeAlpha(TH_ACTIVE, 0, -40);
else
UI_ThemeColorShadeAlpha(TH_SELECT, 0, -40);
uiSetRoundBox(UI_CNR_ALL);
uiDrawBox(GL_LINE_LOOP, rct->xmin, rct->ymin, rct->xmax, rct->ymax, BASIS_RAD);
glDisable(GL_LINE_SMOOTH);
glDisable(GL_BLEND);
}
/* disable lines */
if (node->flag & NODE_MUTED)
node_draw_mute_line(v2d, snode, node);
/* socket inputs, buttons */
for (sock = node->inputs.first; sock; sock = sock->next) {
if (nodeSocketIsHidden(sock))
continue;
node_socket_circle_draw(C, ntree, node, sock, NODE_SOCKSIZE, sock->flag & SELECT);
}
/* socket outputs */
for (sock = node->outputs.first; sock; sock = sock->next) {
if (nodeSocketIsHidden(sock))
continue;
node_socket_circle_draw(C, ntree, node, sock, NODE_SOCKSIZE, sock->flag & SELECT);
}
/* preview */
if (node->flag & NODE_PREVIEW && previews) {
bNodePreview *preview = BKE_node_instance_hash_lookup(previews, key);
if (preview && (preview->xsize && preview->ysize)) {
if (preview->rect && !BLI_rctf_is_empty(&node->prvr)) {
node_draw_preview(preview, &node->prvr);
}
}
}
UI_ThemeClearColor(color_id);
uiEndBlock(C, node->block);
uiDrawBlock(C, node->block);
node->block = NULL;
}
static void node_draw_hidden(const bContext *C, ARegion *ar, SpaceNode *snode, bNodeTree *ntree, bNode *node, bNodeInstanceKey UNUSED(key))
{
bNodeSocket *sock;
rctf *rct = &node->totr;
float dx, centy = BLI_rctf_cent_y(rct);
float hiddenrad = BLI_rctf_size_y(rct) / 2.0f;
float socket_size = NODE_SOCKSIZE;
int color_id = node_get_colorid(node);
char showname[128]; /* 128 is used below */
/* shadow */
node_draw_shadow(snode, node, hiddenrad, 1.0f);
/* body */
UI_ThemeColor(color_id);
if (node->flag & NODE_MUTED)
UI_ThemeColorBlend(color_id, TH_REDALERT, 0.5f);
#ifdef WITH_COMPOSITOR
if (ntree->type == NTREE_COMPOSIT && (snode->flag & SNODE_SHOW_HIGHLIGHT)) {
if (COM_isHighlightedbNode(node)) {
UI_ThemeColorBlend(color_id, TH_ACTIVE, 0.5f);
}
}
#else
(void)ntree;
#endif
uiRoundBox(rct->xmin, rct->ymin, rct->xmax, rct->ymax, hiddenrad);
/* outline active and selected emphasis */
if (node->flag & SELECT) {
glEnable(GL_BLEND);
glEnable(GL_LINE_SMOOTH);
if (node->flag & NODE_ACTIVE)
UI_ThemeColorShadeAlpha(TH_ACTIVE, 0, -40);
else
UI_ThemeColorShadeAlpha(TH_SELECT, 0, -40);
uiDrawBox(GL_LINE_LOOP, rct->xmin, rct->ymin, rct->xmax, rct->ymax, hiddenrad);
glDisable(GL_LINE_SMOOTH);
glDisable(GL_BLEND);
}
/* custom color inline */
if (node->flag & NODE_CUSTOM_COLOR) {
glEnable(GL_BLEND);
glEnable(GL_LINE_SMOOTH);
glColor3fv(node->color);
uiDrawBox(GL_LINE_LOOP, rct->xmin + 1, rct->ymin + 1, rct->xmax -1, rct->ymax - 1, hiddenrad);
glDisable(GL_LINE_SMOOTH);
glDisable(GL_BLEND);
}
/* title */
if (node->flag & SELECT)
UI_ThemeColor(TH_SELECT);
else
UI_ThemeColorBlendShade(TH_TEXT, color_id, 0.4f, 10);
/* open entirely icon */
{
uiBut *but;
int but_size = UI_UNIT_X * 0.6f;
/* XXX button uses a custom triangle draw below, so make it invisible without icon */
uiBlockSetEmboss(node->block, UI_EMBOSSN);
but = uiDefBut(node->block, TOGBUT, B_REDR, "",
rct->xmin + 10.0f - but_size / 2, centy - but_size / 2,
but_size, but_size, NULL, 0, 0, 0, 0, "");
uiButSetFunc(but, node_toggle_button_cb, node, (void *)"NODE_OT_hide_toggle");
uiBlockSetEmboss(node->block, UI_EMBOSS);
/* custom draw function for this button */
UI_DrawTriIcon(rct->xmin + 10.0f, centy, 'h');
}
/* disable lines */
if (node->flag & NODE_MUTED)
node_draw_mute_line(&ar->v2d, snode, node);
if (node->flag & SELECT)
UI_ThemeColor(TH_SELECT);
else
UI_ThemeColor(TH_TEXT);
if (node->miniwidth > 0.0f) {
nodeLabel(ntree, node, showname, sizeof(showname));
//if (node->flag & NODE_MUTED)
// BLI_snprintf(showname, sizeof(showname), "[%s]", showname); /* XXX - don't print into self! */
uiDefBut(node->block, LABEL, 0, showname,
(int)(rct->xmin + (NODE_MARGIN_X)), (int)(centy - 10),
(short)(BLI_rctf_size_x(rct) - 18.0f - 12.0f), (short)NODE_DY,
NULL, 0, 0, 0, 0, "");
}
/* scale widget thing */
UI_ThemeColorShade(color_id, -10);
dx = 10.0f;
fdrawline(rct->xmax - dx, centy - 4.0f, rct->xmax - dx, centy + 4.0f);
fdrawline(rct->xmax - dx - 3.0f * snode->aspect, centy - 4.0f, rct->xmax - dx - 3.0f * snode->aspect, centy + 4.0f);
UI_ThemeColorShade(color_id, +30);
dx -= snode->aspect;
fdrawline(rct->xmax - dx, centy - 4.0f, rct->xmax - dx, centy + 4.0f);
fdrawline(rct->xmax - dx - 3.0f * snode->aspect, centy - 4.0f, rct->xmax - dx - 3.0f * snode->aspect, centy + 4.0f);
/* sockets */
for (sock = node->inputs.first; sock; sock = sock->next) {
if (!nodeSocketIsHidden(sock))
node_socket_circle_draw(C, ntree, node, sock, socket_size, sock->flag & SELECT);
}
for (sock = node->outputs.first; sock; sock = sock->next) {
if (!nodeSocketIsHidden(sock))
node_socket_circle_draw(C, ntree, node, sock, socket_size, sock->flag & SELECT);
}
uiEndBlock(C, node->block);
uiDrawBlock(C, node->block);
node->block = NULL;
}
int node_get_resize_cursor(int directions)
{
if (directions == 0)
return CURSOR_STD;
else if ((directions & ~(NODE_RESIZE_TOP | NODE_RESIZE_BOTTOM)) == 0)
return CURSOR_Y_MOVE;
else if ((directions & ~(NODE_RESIZE_RIGHT | NODE_RESIZE_LEFT)) == 0)
return CURSOR_X_MOVE;
else
return CURSOR_EDIT;
}
void node_set_cursor(wmWindow *win, SpaceNode *snode, float cursor[2])
{
bNodeTree *ntree = snode->edittree;
bNode *node;
bNodeSocket *sock;
int wmcursor = CURSOR_STD;
if (ntree) {
if (node_find_indicated_socket(snode, &node, &sock, cursor, SOCK_IN | SOCK_OUT)) {
/* pass */
}
else {
/* check nodes front to back */
for (node = ntree->nodes.last; node; node = node->prev) {
if (BLI_rctf_isect_pt(&node->totr, cursor[0], cursor[1]))
break; /* first hit on node stops */
}
if (node) {
int dir = node->typeinfo->resize_area_func(node, cursor[0], cursor[1]);
wmcursor = node_get_resize_cursor(dir);
}
}
}
WM_cursor_set(win, wmcursor);
}
void node_draw_default(const bContext *C, ARegion *ar, SpaceNode *snode, bNodeTree *ntree, bNode *node, bNodeInstanceKey key)
{
if (node->flag & NODE_HIDDEN)
node_draw_hidden(C, ar, snode, ntree, node, key);
else
node_draw_basis(C, ar, snode, ntree, node, key);
}
static void node_update(const bContext *C, bNodeTree *ntree, bNode *node)
{
if (node->typeinfo->draw_nodetype_prepare)
node->typeinfo->draw_nodetype_prepare(C, ntree, node);
}
void node_update_nodetree(const bContext *C, bNodeTree *ntree)
{
bNode *node;
/* update nodes front to back, so children sizes get updated before parents */
for (node = ntree->nodes.last; node; node = node->prev) {
node_update(C, ntree, node);
}
}
static void node_draw(const bContext *C, ARegion *ar, SpaceNode *snode, bNodeTree *ntree, bNode *node, bNodeInstanceKey key)
{
if (node->typeinfo->draw_nodetype)
node->typeinfo->draw_nodetype(C, ar, snode, ntree, node, key);
}
#define USE_DRAW_TOT_UPDATE
void node_draw_nodetree(const bContext *C, ARegion *ar, SpaceNode *snode, bNodeTree *ntree, bNodeInstanceKey parent_key)
{
bNode *node;
bNodeLink *link;
int a;
if (ntree == NULL) return; /* groups... */
#ifdef USE_DRAW_TOT_UPDATE
if (ntree->nodes.first) {
BLI_rctf_init_minmax(&ar->v2d.tot);
}
#endif
/* draw background nodes, last nodes in front */
for (a = 0, node = ntree->nodes.first; node; node = node->next, a++) {
bNodeInstanceKey key;
#ifdef USE_DRAW_TOT_UPDATE
/* unrelated to background nodes, update the v2d->tot,
* can be anywhere before we draw the scroll bars */
BLI_rctf_union(&ar->v2d.tot, &node->totr);
#endif
if (!(node->flag & NODE_BACKGROUND))
continue;
key = BKE_node_instance_key(parent_key, ntree, node);
node->nr = a; /* index of node in list, used for exec event code */
node_draw(C, ar, snode, ntree, node, key);
}
/* node lines */
glEnable(GL_BLEND);
glEnable(GL_LINE_SMOOTH);
for (link = ntree->links.first; link; link = link->next) {
if (!nodeLinkIsHidden(link))
node_draw_link(&ar->v2d, snode, link);
}
glDisable(GL_LINE_SMOOTH);
glDisable(GL_BLEND);
/* draw foreground nodes, last nodes in front */
for (a = 0, node = ntree->nodes.first; node; node = node->next, a++) {
bNodeInstanceKey key;
if (node->flag & NODE_BACKGROUND)
continue;
key = BKE_node_instance_key(parent_key, ntree, node);
node->nr = a; /* index of node in list, used for exec event code */
node_draw(C, ar, snode, ntree, node, key);
}
}
/* draw tree path info in lower left corner */
static void draw_tree_path(SpaceNode *snode)
{
char info[256];
ED_node_tree_path_get_fixedbuf(snode, info, sizeof(info));
UI_ThemeColor(TH_TEXT_HI);
BLF_draw_default(1.5f * UI_UNIT_X, 1.5f * UI_UNIT_Y, 0.0f, info, sizeof(info));
}
static void snode_setup_v2d(SpaceNode *snode, ARegion *ar, const float center[2])
{
View2D *v2d = &ar->v2d;
/* shift view to node tree center */
UI_view2d_center_set(v2d, center[0], center[1]);
UI_view2d_view_ortho(v2d);
/* aspect+font, set each time */
snode->aspect = BLI_rctf_size_x(&v2d->cur) / (float)ar->winx;
// XXX snode->curfont = uiSetCurFont_ext(snode->aspect);
}
static void draw_nodetree(const bContext *C, ARegion *ar, bNodeTree *ntree, bNodeInstanceKey parent_key)
{
SpaceNode *snode = CTX_wm_space_node(C);
node_uiblocks_init(C, ntree);
#ifdef WITH_COMPOSITOR
if (ntree->type == NTREE_COMPOSIT) {
COM_startReadHighlights();
}
#endif
node_update_nodetree(C, ntree);
node_draw_nodetree(C, ar, snode, ntree, parent_key);
}
/* shade the parent node group and add a uiBlock to clip mouse events */
static void draw_group_overlay(const bContext *C, ARegion *ar)
{
View2D *v2d = &ar->v2d;
rctf rect = v2d->cur;
uiBlock *block;
/* shade node groups to separate them visually */
UI_ThemeColorShadeAlpha(TH_NODE_GROUP, 0, -70);
glEnable(GL_BLEND);
uiSetRoundBox(UI_CNR_NONE);
uiDrawBox(GL_POLYGON, rect.xmin, rect.ymin, rect.xmax, rect.ymax, 0);
glDisable(GL_BLEND);
/* set the block bounds to clip mouse events from underlying nodes */
block = uiBeginBlock(C, ar, "node tree bounds block", UI_EMBOSS);
uiExplicitBoundsBlock(block, rect.xmin, rect.ymin, rect.xmax, rect.ymax);
uiBlockSetFlag(block, UI_BLOCK_CLIP_EVENTS);
uiEndBlock(C, block);
}
void drawnodespace(const bContext *C, ARegion *ar)
{
wmWindow *win = CTX_wm_window(C);
View2DScrollers *scrollers;
SpaceNode *snode = CTX_wm_space_node(C);
View2D *v2d = &ar->v2d;
UI_ThemeClearColor(TH_BACK);
glClear(GL_COLOR_BUFFER_BIT);
UI_view2d_view_ortho(v2d);
/* XXX snode->cursor set in coordspace for placing new nodes, used for drawing noodles too */
UI_view2d_region_to_view(&ar->v2d, win->eventstate->x - ar->winrct.xmin, win->eventstate->y - ar->winrct.ymin,
&snode->cursor[0], &snode->cursor[1]);
snode->cursor[0] /= UI_DPI_FAC;
snode->cursor[1] /= UI_DPI_FAC;
ED_region_draw_cb_draw(C, ar, REGION_DRAW_PRE_VIEW);
/* only set once */
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_MAP1_VERTEX_3);
/* nodes */
snode_set_context(C);
/* draw parent node trees */
if (snode->treepath.last) {
static const int max_depth = 2;
bNodeTreePath *path;
int depth, curdepth;
float center[2];
bNodeTree *ntree;
bNodeLinkDrag *nldrag;
LinkData *linkdata;
path = snode->treepath.last;
/* current View2D center, will be set temporarily for parent node trees */
UI_view2d_center_get(v2d, &center[0], &center[1]);
/* store new view center in path and current edittree */
copy_v2_v2(path->view_center, center);
if (snode->edittree)
copy_v2_v2(snode->edittree->view_center, center);
depth = 0;
while (path->prev && depth < max_depth) {
path = path->prev;
++depth;
}
/* parent node trees in the background */
for (curdepth = depth; curdepth > 0; path = path->next, --curdepth) {
ntree = path->nodetree;
if (ntree) {
snode_setup_v2d(snode, ar, path->view_center);
draw_nodetree(C, ar, ntree, path->parent_key);
draw_group_overlay(C, ar);
}
}
/* top-level edit tree */
ntree = path->nodetree;
if (ntree) {
snode_setup_v2d(snode, ar, center);
/* grid, uses theme color based on node path depth */
UI_view2d_multi_grid_draw(v2d, (depth > 0 ? TH_NODE_GROUP : TH_BACK), ED_node_grid_size(), NODE_GRID_STEPS, 2);
/* backdrop */
draw_nodespace_back_pix(C, ar, snode, path->parent_key);
draw_nodetree(C, ar, ntree, path->parent_key);
}
/* temporary links */
glEnable(GL_BLEND);
glEnable(GL_LINE_SMOOTH);
for (nldrag = snode->linkdrag.first; nldrag; nldrag = nldrag->next) {
for (linkdata = nldrag->links.first; linkdata; linkdata = linkdata->next)
node_draw_link(v2d, snode, (bNodeLink *)linkdata->data);
}
glDisable(GL_LINE_SMOOTH);
glDisable(GL_BLEND);
if (snode->flag & SNODE_SHOW_GPENCIL) {
/* draw grease-pencil ('canvas' strokes) */
draw_gpencil_view2d(C, true);
}
}
else {
/* default grid */
UI_view2d_multi_grid_draw(v2d, TH_BACK, ED_node_grid_size(), NODE_GRID_STEPS, 2);
/* backdrop */
draw_nodespace_back_pix(C, ar, snode, NODE_INSTANCE_KEY_NONE);
}
ED_region_draw_cb_draw(C, ar, REGION_DRAW_POST_VIEW);
/* reset view matrix */
UI_view2d_view_restore(C);
if (snode->treepath.last) {
if (snode->flag & SNODE_SHOW_GPENCIL) {
/* draw grease-pencil (screen strokes, and also paintbuffer) */
draw_gpencil_view2d(C, false);
}
}
/* tree path info */
draw_tree_path(snode);
/* scrollers */
scrollers = UI_view2d_scrollers_calc(C, v2d, 10, V2D_GRID_CLAMP, V2D_ARG_DUMMY, V2D_ARG_DUMMY);
UI_view2d_scrollers_draw(C, v2d, scrollers);
UI_view2d_scrollers_free(scrollers);
}
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