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source/blender/editors/gpencil/gpencil_fill.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) 2017, Blender Foundation, Joshua Leung
* This is a new part of Blender
*
* Contributor(s): Antonio Vazquez, Joshua Leung
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/editors/gpencil/gpencil_fill.c
* \ingroup edgpencil
*/
#include <stdio.h>
#include "MEM_guardedalloc.h"
#include "BLI_utildefines.h"
#include "BLI_blenlib.h"
#include "BLI_math.h"
#include "BLI_stack.h"
#include "BLT_translation.h"
#include "DNA_brush_types.h"
#include "DNA_gpencil_types.h"
#include "DNA_image_types.h"
#include "DNA_object_types.h"
#include "DNA_windowmanager_types.h"
#include "BKE_main.h"
#include "BKE_brush.h"
#include "BKE_image.h"
#include "BKE_gpencil.h"
#include "BKE_context.h"
#include "BKE_screen.h"
#include "BKE_paint.h"
#include "ED_gpencil.h"
#include "ED_screen.h"
#include "ED_space_api.h"
#include "ED_view3d.h"
#include "RNA_access.h"
#include "RNA_define.h"
#include "IMB_imbuf.h"
#include "IMB_imbuf_types.h"
#include "GPU_immediate.h"
#include "GPU_draw.h"
#include "GPU_matrix.h"
#include "GPU_framebuffer.h"
#include "UI_interface.h"
#include "WM_api.h"
#include "WM_types.h"
#include "gpencil_intern.h"
#define LEAK_HORZ 0
#define LEAK_VERT 1
/* Temporary fill operation data (op->customdata) */
typedef struct tGPDfill {
struct Depsgraph *depsgraph;
struct wmWindow *win; /* window where painting originated */
struct Scene *scene; /* current scene from context */
struct Object *ob; /* current active gp object */
struct ScrArea *sa; /* area where painting originated */
struct RegionView3D *rv3d; /* region where painting originated */
struct View3D *v3d; /* view3 where painting originated */
struct ARegion *ar; /* region where painting originated */
struct bGPdata *gpd; /* current GP datablock */
struct Palette *palette; /* current palette */
struct PaletteColor *palcolor; /* current palette color */
struct bGPDlayer *gpl; /* layer */
struct bGPDframe *gpf; /* frame */
short flag; /* flags */
short oldkey; /* avoid too fast events */
bool on_back; /* send to back stroke */
int center[2]; /* mouse fill center position */
int sizex; /* windows width */
int sizey; /* window height */
int lock_axis; /* lock to viewport axis */
short fill_leak; /* number of pixel to consider the leak is too small (x 2) */
float fill_threshold; /* factor for transparency */
int fill_simplylvl; /* number of simplify steps */
int fill_draw_mode; /* boundary limits drawing mode */
short sbuffer_size; /* number of elements currently in cache */
void *sbuffer; /* temporary points */
float *depth_arr; /* depth array for reproject */
Image *ima; /* temp image */
BLI_Stack *stack; /* temp points data */
void *draw_handle_3d; /* handle for drawing strokes while operator is running 3d stuff */
} tGPDfill;
/* draw a given stroke using same thickness and color for all points */
static void gp_draw_basic_stroke(bGPDstroke *gps, const float diff_mat[4][4],
bool cyclic, float ink[4], int flag, float thershold)
{
bGPDspoint *points = gps->points;
int totpoints = gps->totpoints;
float fpt[3];
float col[4];
copy_v4_v4(col, ink);
/* if cyclic needs more vertex */
int cyclic_add = (cyclic) ? 1 : 0;
Gwn_VertFormat *format = immVertexFormat();
unsigned pos = GWN_vertformat_attr_add(format, "pos", GWN_COMP_F32, 3, GWN_FETCH_FLOAT);
unsigned color = GWN_vertformat_attr_add(format, "color", GWN_COMP_F32, 4, GWN_FETCH_FLOAT);
immBindBuiltinProgram(GPU_SHADER_3D_FLAT_COLOR);
/* draw stroke curve */
glLineWidth(1.0f);
immBeginAtMost(GWN_PRIM_LINE_STRIP, totpoints + cyclic_add);
const bGPDspoint *pt = points;
for (int i = 0; i < totpoints; i++, pt++) {
if (flag & GP_BRUSH_FILL_HIDE) {
float alpha = gps->palcolor->rgb[3] * pt->strength;
CLAMP(alpha, 0.0f, 1.0f);
col[3] = alpha <= thershold ? 0.0f : 1.0f;
}
else {
col[3] = 1.0f;
}
/* set point */
immAttrib4fv(color, col);
mul_v3_m4v3(fpt, diff_mat, &pt->x);
immVertex3fv(pos, fpt);
}
if (cyclic && totpoints > 2) {
/* draw line to first point to complete the cycle */
immAttrib4fv(color, col);
mul_v3_m4v3(fpt, diff_mat, &points->x);
immVertex3fv(pos, fpt);
}
immEnd();
immUnbindProgram();
}
/* loop all layers */
static void gp_draw_datablock(tGPDfill *tgpf, float ink[4])
{
/* duplicated: etempFlags */
enum {
GP_DRAWFILLS_NOSTATUS = (1 << 0), /* don't draw status info */
GP_DRAWFILLS_ONLY3D = (1 << 1), /* only draw 3d-strokes */
};
Scene *scene = tgpf->scene;
Object *ob = tgpf->ob;
bGPdata *gpd = tgpf->gpd;
tGPDdraw tgpw;
tgpw.rv3d = tgpf->rv3d;
tgpw.ob = ob;
tgpw.gpd = gpd;
tgpw.offsx = 0;
tgpw.offsy = 0;
tgpw.winx = tgpf->ar->winx;
tgpw.winy = tgpf->ar->winy;
tgpw.dflag = 0;
tgpw.disable_fill = 1;
tgpw.dflag |= (GP_DRAWFILLS_ONLY3D | GP_DRAWFILLS_NOSTATUS);
glEnable(GL_BLEND);
for (bGPDlayer *gpl = gpd->layers.first; gpl; gpl = gpl->next) {
/* calculate parent position */
ED_gpencil_parent_location(ob, gpd, gpl, tgpw.diff_mat);
/* do not draw layer if hidden */
if (gpl->flag & GP_LAYER_HIDE)
continue;
/* get frame to draw */
bGPDframe *gpf = BKE_gpencil_layer_getframe(gpl, CFRA, 0);
if (gpf == NULL)
continue;
for (bGPDstroke *gps = gpf->strokes.first; gps; gps = gps->next) {
/* check if stroke can be drawn */
if ((gps->points == NULL) || (gps->totpoints < 2)) {
continue;
}
/* check if the color is visible */
PaletteColor *palcolor = gps->palcolor;
if ((palcolor == NULL) || (palcolor->flag & PC_COLOR_HIDE))
{
continue;
}
tgpw.gps = gps;
tgpw.gpl = gpl;
tgpw.gpf = gpf;
tgpw.t_gpf = gpf;
/* reduce thickness to avoid gaps */
tgpw.lthick = gpl->thickness - 4;
tgpw.opacity = 1.0;
copy_v4_v4(tgpw.tintcolor, ink);
tgpw.onion = true;
tgpw.custonion = true;
/* normal strokes */
if ((tgpf->fill_draw_mode == GP_FILL_DMODE_STROKE) ||
(tgpf->fill_draw_mode == GP_FILL_DMODE_BOTH))
{
ED_gp_draw_fill(&tgpw);
}
/* 3D Lines with basic shapes and invisible lines */
if ((tgpf->fill_draw_mode == GP_FILL_DMODE_CONTROL) ||
(tgpf->fill_draw_mode == GP_FILL_DMODE_BOTH))
{
gp_draw_basic_stroke(gps, tgpw.diff_mat, gps->flag & GP_STROKE_CYCLIC, ink,
tgpf->flag, tgpf->fill_threshold);
}
}
}
glDisable(GL_BLEND);
}
/* draw strokes in offscreen buffer */
static void gp_render_offscreen(tGPDfill *tgpf)
{
bool is_ortho = false;
float winmat[4][4];
if (!tgpf->gpd) {
return;
}
char err_out[256] = "unknown";
GPUOffScreen *offscreen = GPU_offscreen_create(tgpf->sizex, tgpf->sizey, 0, true, false, err_out);
GPU_offscreen_bind(offscreen, true);
unsigned int flag = IB_rect | IB_rectfloat;
ImBuf *ibuf = IMB_allocImBuf(tgpf->sizex, tgpf->sizey, 32, flag);
rctf viewplane;
float clipsta, clipend;
is_ortho = ED_view3d_viewplane_get(tgpf->depsgraph, tgpf->v3d, tgpf->rv3d, tgpf->sizex, tgpf->sizey, &viewplane, &clipsta, &clipend, NULL);
if (is_ortho) {
orthographic_m4(winmat, viewplane.xmin, viewplane.xmax, viewplane.ymin, viewplane.ymax, -clipend, clipend);
}
else {
perspective_m4(winmat, viewplane.xmin, viewplane.xmax, viewplane.ymin, viewplane.ymax, clipsta, clipend);
}
/* set temporary new size */
int bwinx = tgpf->ar->winx;
int bwiny = tgpf->ar->winy;
rcti brect = tgpf->ar->winrct;
tgpf->ar->winx = (short) tgpf->sizex;
tgpf->ar->winy = (short) tgpf->sizey;
tgpf->ar->winrct.xmin = 0;
tgpf->ar->winrct.ymin = 0;
tgpf->ar->winrct.xmax = tgpf->sizex;
tgpf->ar->winrct.ymax = tgpf->sizey;
gpuPushProjectionMatrix();
gpuLoadIdentity();
gpuPushMatrix();
gpuLoadIdentity();
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
ED_view3d_update_viewmat(tgpf->depsgraph, tgpf->scene, tgpf->v3d, tgpf->ar,
NULL, winmat, NULL);
/* set for opengl */
gpuLoadProjectionMatrix(tgpf->rv3d->winmat);
gpuLoadMatrix(tgpf->rv3d->viewmat);
/* draw strokes */
float ink[4] = { 1.0f, 0.0f, 0.0f, 1.0f };
gp_draw_datablock(tgpf, ink);
/* restore size */
tgpf->ar->winx = (short)bwinx;
tgpf->ar->winy = (short)bwiny;
tgpf->ar->winrct = brect;
gpuPopProjectionMatrix();
gpuPopMatrix();
/* create a image to see result of template */
if (ibuf->rect_float) {
GPU_offscreen_read_pixels(offscreen, GL_FLOAT, ibuf->rect_float);
}
else if (ibuf->rect) {
GPU_offscreen_read_pixels(offscreen, GL_UNSIGNED_BYTE, ibuf->rect);
}
if (ibuf->rect_float && ibuf->rect) {
IMB_rect_from_float(ibuf);
}
tgpf->ima = BKE_image_add_from_imbuf(ibuf, "GP_fill");
tgpf->ima->id.tag |= LIB_TAG_DOIT;
BKE_image_release_ibuf(tgpf->ima, ibuf, NULL);
/* switch back to window-system-provided framebuffer */
GPU_offscreen_unbind(offscreen, true);
GPU_offscreen_free(offscreen);
}
/* return pixel data (rgba) at index */
static void get_pixel(ImBuf *ibuf, int idx, float r_col[4])
{
if (ibuf->rect_float) {
float *frgba = &ibuf->rect_float[idx * 4];
copy_v4_v4(r_col, frgba);
}
else {
/* XXX: This case probably doesn't happen, as we only write to the float buffer,
* but we get compiler warnings about uninitialised vars otherwise
*/
BLI_assert(!"gpencil_fill.c - get_pixel() non-float case is used!");
zero_v4(r_col);
}
}
/* set pixel data (rgba) at index */
static void set_pixel(ImBuf *ibuf, int idx, const float col[4])
{
if (ibuf->rect) {
unsigned int *rrect = &ibuf->rect[idx];
uchar ccol[4];
rgba_float_to_uchar(ccol, col);
*rrect = *((unsigned int *)ccol);
}
if (ibuf->rect_float) {
float *rrectf = &ibuf->rect_float[idx * 4];
copy_v4_v4(rrectf, col);
}
}
/* check if the size of the leak is narrow to determine if the stroke is closed
* this is used for strokes with small gaps between them to get a full fill
* and do not get a full screen fill.
*
* \param ibuf Image pixel data
* \param maxpixel Maximum index
* \param limit Limit of pixels to analize
* \param index Index of current pixel
* \param type 0-Horizontal 1-Vertical
*/
static bool is_leak_narrow(ImBuf *ibuf, const int maxpixel, int limit, int index, int type)
{
float rgba[4];
int i;
int pt;
bool t_a = false;
bool t_b = false;
/* Horizontal leak (check vertical pixels)
* X
* X
* xB7
* X
* X
*/
if (type == LEAK_HORZ) {
/* pixels on top */
for (i = 1; i <= limit; i++) {
pt = index + (ibuf->x * i);
if (pt <= maxpixel) {
get_pixel(ibuf, pt, rgba);
if (rgba[0] == 1.0f) {
t_a = true;
break;
}
}
else {
t_a = true; /* edge of image*/
break;
}
}
/* pixels on bottom */
for (i = 1; i <= limit; i++) {
pt = index - (ibuf->x * i);
if (pt >= 0) {
get_pixel(ibuf, pt, rgba);
if (rgba[0] == 1.0f) {
t_b = true;
break;
}
}
else {
t_b = true; /* edge of image*/
break;
}
}
}
/* Vertical leak (check horizontal pixels)
*
* XXXxB7XX
*
*/
if (type == LEAK_VERT) {
/* get pixel range of the row */
int row = index / ibuf->x;
int lowpix = row * ibuf->x;
int higpix = lowpix + ibuf->x - 1;
/* pixels to right */
for (i = 0; i < limit; i++) {
pt = index - (limit - i);
if (pt >= lowpix) {
get_pixel(ibuf, pt, rgba);
if (rgba[0] == 1.0f) {
t_a = true;
break;
}
}
else {
t_a = true; /* edge of image*/
break;
}
}
/* pixels to left */
for (i = 0; i < limit; i++) {
pt = index + (limit - i);
if (pt <= higpix) {
get_pixel(ibuf, pt, rgba);
if (rgba[0] == 1.0f) {
t_b = true;
break;
}
}
else {
t_b = true; /* edge of image */
break;
}
}
}
return (bool)(t_a && t_b);
}
/* Boundary fill inside strokes
* Fills the space created by a set of strokes using the stroke color as the boundary
* of the shape to fill.
*
* \param tgpf Temporary fill data
*/
static void gpencil_boundaryfill_area(tGPDfill *tgpf)
{
ImBuf *ibuf;
float rgba[4];
void *lock;
const float fill_col[4] = { 0.0f, 1.0f, 0.0f, 1.0f };
ibuf = BKE_image_acquire_ibuf(tgpf->ima, NULL, &lock);
const int maxpixel = (ibuf->x * ibuf->y) - 1;
BLI_Stack *stack = BLI_stack_new(sizeof(int), __func__);
/* calculate index of the seed point using the position of the mouse */
int index = (tgpf->sizex * tgpf->center[1]) + tgpf->center[0];
if ((index >= 0) && (index < maxpixel)) {
BLI_stack_push(stack, &index);
}
/* the fill use a stack to save the pixel list instead of the common recursive
* 4-contact point method.
* The problem with recursive calls is that for big fill areas, we can get max limit
* of recursive calls and STACK_OVERFLOW error.
*
* The 4-contact point analyze the pixels to the left, right, bottom and top
* -----------
* | X |
* | XoX |
* | X |
* -----------
*/
while (!BLI_stack_is_empty(stack)) {
int v;
BLI_stack_pop(stack, &v);
get_pixel(ibuf, v, rgba);
if (true) { /* Was: 'rgba' */
/* check if no border(red) or already filled color(green) */
if ((rgba[0] != 1.0f) && (rgba[1] != 1.0f))
{
/* fill current pixel */
set_pixel(ibuf, v, fill_col);
/* add contact pixels */
/* pixel left */
if (v - 1 >= 0) {
index = v - 1;
if (!is_leak_narrow(ibuf, maxpixel, tgpf->fill_leak, v, LEAK_HORZ)) {
BLI_stack_push(stack, &index);
}
}
/* pixel right */
if (v + 1 < maxpixel) {
index = v + 1;
if (!is_leak_narrow(ibuf, maxpixel, tgpf->fill_leak, v, LEAK_HORZ)) {
BLI_stack_push(stack, &index);
}
}
/* pixel top */
if (v + tgpf->sizex < maxpixel) {
index = v + tgpf->sizex;
if (!is_leak_narrow(ibuf, maxpixel, tgpf->fill_leak, v, LEAK_VERT)) {
BLI_stack_push(stack, &index);
}
}
/* pixel bottom */
if (v - tgpf->sizex >= 0) {
index = v - tgpf->sizex;
if (!is_leak_narrow(ibuf, maxpixel, tgpf->fill_leak, v, LEAK_VERT)) {
BLI_stack_push(stack, &index);
}
}
}
}
}
/* release ibuf */
if (ibuf) {
BKE_image_release_ibuf(tgpf->ima, ibuf, lock);
}
tgpf->ima->id.tag |= LIB_TAG_DOIT;
/* free temp stack data */
BLI_stack_free(stack);
}
/* clean external border of image to avoid infinite loops */
static void gpencil_clean_borders(tGPDfill *tgpf)
{
ImBuf *ibuf;
void *lock;
const float fill_col[4] = { 0.0f, 0.0f, 0.0f, 0.0f };
ibuf = BKE_image_acquire_ibuf(tgpf->ima, NULL, &lock);
int idx;
/* horizontal lines */
for (idx = 0; idx < ibuf->x; idx++) {
/* bottom line */
set_pixel(ibuf, idx, fill_col);
/* top line */
set_pixel(ibuf, idx + (ibuf->x * (ibuf->y - 1)), fill_col);
}
/* vertical lines */
for (idx = 0; idx < ibuf->y; idx++) {
/* left line */
set_pixel(ibuf, ibuf->x * idx, fill_col);
/* right line */
set_pixel(ibuf, ibuf->x * idx + (ibuf->x - 1), fill_col);
}
/* release ibuf */
if (ibuf) {
BKE_image_release_ibuf(tgpf->ima, ibuf, lock);
}
tgpf->ima->id.tag |= LIB_TAG_DOIT;
}
/* Get the outline points of a shape using Moore Neighborhood algorithm
*
* This is a Blender customized version of the general algorithm described
* in https://en.wikipedia.org/wiki/Moore_neighborhood
*/
static void gpencil_get_outline_points(tGPDfill *tgpf)
{
ImBuf *ibuf;
float rgba[4];
void *lock;
int v[2];
int boundary_co[2];
int start_co[2];
int backtracked_co[2];
int current_check_co[2];
int prev_check_co[2];
int backtracked_offset[1][2] = { { 0,0 } };
// bool boundary_found = false;
bool start_found = false;
const int NEIGHBOR_COUNT = 8;
int offset[8][2] = {
{ -1, -1 },
{ 0, -1 },
{ 1, -1 },
{ 1, 0 },
{ 1, 1 },
{ 0, 1 },
{ -1, 1 },
{ -1, 0 }
};
tgpf->stack = BLI_stack_new(sizeof(int[2]), __func__);
ibuf = BKE_image_acquire_ibuf(tgpf->ima, NULL, &lock);
int imagesize = ibuf->x * ibuf->y;
/* find the initial point to start outline analysis */
for (int idx = imagesize; idx >= 0; idx--) {
get_pixel(ibuf, idx, rgba);
if (rgba[1] == 1.0f) {
boundary_co[0] = idx % ibuf->x;
boundary_co[1] = idx / ibuf->x;
copy_v2_v2_int(start_co, boundary_co);
backtracked_co[0] = (idx - 1) % ibuf->x;
backtracked_co[1] = (idx - 1) / ibuf->x;
backtracked_offset[0][0] = backtracked_co[0] - boundary_co[0];
backtracked_offset[0][1] = backtracked_co[1] - boundary_co[1];
copy_v2_v2_int(prev_check_co, start_co);
BLI_stack_push(tgpf->stack, &boundary_co);
start_found = true;
break;
}
}
while (true && start_found)
{
int cur_back_offset = -1;
for (int i = 0; i < NEIGHBOR_COUNT; i++) {
if (backtracked_offset[0][0] == offset[i][0] &&
backtracked_offset[0][1] == offset[i][1])
{
/* Finding the bracktracked pixel offset index */
cur_back_offset = i;
break;
}
}
int loop = 0;
while (loop < (NEIGHBOR_COUNT - 1) && cur_back_offset != -1) {
int offset_idx = (cur_back_offset + 1) % NEIGHBOR_COUNT;
current_check_co[0] = boundary_co[0] + offset[offset_idx][0];
current_check_co[1] = boundary_co[1] + offset[offset_idx][1];
int image_idx = ibuf->x * current_check_co[1] + current_check_co[0];
get_pixel(ibuf, image_idx, rgba);
/* find next boundary pixel */
if (rgba[1] == 1.0f) {
copy_v2_v2_int(boundary_co, current_check_co);
copy_v2_v2_int(backtracked_co, prev_check_co);
backtracked_offset[0][0] = backtracked_co[0] - boundary_co[0];
backtracked_offset[0][1] = backtracked_co[1] - boundary_co[1];
BLI_stack_push(tgpf->stack, &boundary_co);
break;
}
copy_v2_v2_int(prev_check_co, current_check_co);
cur_back_offset++;
loop++;
}
/* current pixel is equal to starting pixel */
if (boundary_co[0] == start_co[0] &&
boundary_co[1] == start_co[1])
{
BLI_stack_pop(tgpf->stack, &v);
// boundary_found = true;
break;
}
}
/* release ibuf */
if (ibuf) {
BKE_image_release_ibuf(tgpf->ima, ibuf, lock);
}
}
/* get z-depth array to reproject on surface */
static void gpencil_get_depth_array(tGPDfill *tgpf)
{
tGPspoint *ptc;
ToolSettings *ts = tgpf->scene->toolsettings;
int totpoints = tgpf->sbuffer_size;
int i = 0;
if (totpoints == 0) {
return;
}
/* for surface sketching, need to set the right OpenGL context stuff so that
* the conversions will project the values correctly...
*/
if (ts->gpencil_v3d_align & GP_PROJECT_DEPTH_VIEW) {
/* need to restore the original projection settings before packing up */
view3d_region_operator_needs_opengl(tgpf->win, tgpf->ar);
ED_view3d_autodist_init(tgpf->depsgraph, tgpf->ar, tgpf->v3d, 0);
/* since strokes are so fine, when using their depth we need a margin otherwise they might get missed */
int depth_margin = 0;
/* get an array of depths, far depths are blended */
int mval[2], mval_prev[2] = { 0 };
int interp_depth = 0;
int found_depth = 0;
tgpf->depth_arr = MEM_mallocN(sizeof(float) * totpoints, "depth_points");
for (i = 0, ptc = tgpf->sbuffer; i < totpoints; i++, ptc++) {
copy_v2_v2_int(mval, &ptc->x);
if ((ED_view3d_autodist_depth(tgpf->ar, mval, depth_margin, tgpf->depth_arr + i) == 0) &&
(i && (ED_view3d_autodist_depth_seg(tgpf->ar, mval, mval_prev, depth_margin + 1, tgpf->depth_arr + i) == 0)))
{
interp_depth = true;
}
else {
found_depth = true;
}
copy_v2_v2_int(mval_prev, mval);
}
if (found_depth == false) {
/* eeh... not much we can do.. :/, ignore depth in this case */
for (i = totpoints - 1; i >= 0; i--)
tgpf->depth_arr[i] = 0.9999f;
}
else {
if (interp_depth) {
interp_sparse_array(tgpf->depth_arr, totpoints, FLT_MAX);
}
}
}
}
/* create array of points using stack as source */
static void gpencil_points_from_stack(tGPDfill *tgpf)
{
tGPspoint *point2D;
int totpoints = BLI_stack_count(tgpf->stack);
if (totpoints == 0) {
return;
}
tgpf->sbuffer_size = (short)totpoints;
tgpf->sbuffer = MEM_callocN(sizeof(tGPspoint) * totpoints, __func__);
point2D = tgpf->sbuffer;
while (!BLI_stack_is_empty(tgpf->stack)) {
int v[2];
BLI_stack_pop(tgpf->stack, &v);
point2D->x = v[0];
point2D->y = v[1];
point2D->pressure = 1.0f;
point2D->strength = 1.0f;;
point2D->time = 0.0f;
point2D++;
}
}
/* create a grease pencil stroke using points in buffer */
static void gpencil_stroke_from_buffer(tGPDfill *tgpf)
{
Scene *scene = tgpf->scene;
ToolSettings *ts = tgpf->scene->toolsettings;
Brush *brush;
brush = BKE_brush_getactive_gpencil(ts);
if (brush == NULL) {
return;
}
bGPDspoint *pt;
tGPspoint *point2D;
if (tgpf->sbuffer_size == 0) {
return;
}
/* get frame or create a new one */
tgpf->gpf = BKE_gpencil_layer_getframe(tgpf->gpl, CFRA, GP_GETFRAME_ADD_NEW);
/* create new stroke */
bGPDstroke *gps = MEM_callocN(sizeof(bGPDstroke), "bGPDstroke");
gps->thickness = brush->thickness;
gps->inittime = 0.0f;
/* the polygon must be closed, so enabled cyclic */
gps->flag |= GP_STROKE_CYCLIC;
gps->flag |= GP_STROKE_3DSPACE;
gps->palette = tgpf->palette;
gps->palcolor = tgpf->palcolor;
if (tgpf->palcolor)
BLI_strncpy(gps->colorname, tgpf->palcolor->info, sizeof(gps->colorname));
/* allocate memory for storage points */
gps->totpoints = tgpf->sbuffer_size;
gps->points = MEM_callocN(sizeof(bGPDspoint) * tgpf->sbuffer_size, "gp_stroke_points");
/* initialize triangle memory to dummy data */
gps->tot_triangles = 0;
gps->triangles = NULL;
gps->flag |= GP_STROKE_RECALC_CACHES;
/* add stroke to frame */
if ((ts->gpencil_flags & GP_TOOL_FLAG_PAINT_ONBACK) || (tgpf->on_back == true)){
BLI_addhead(&tgpf->gpf->strokes, gps);
}
else {
BLI_addtail(&tgpf->gpf->strokes, gps);
}
/* add points */
pt = gps->points;
point2D = (tGPspoint *)tgpf->sbuffer;
for (int i = 0; i < tgpf->sbuffer_size && point2D; i++, point2D++, pt++) {
/* convert screen-coordinates to 3D coordinates */
gp_stroke_convertcoords_tpoint(tgpf->scene, tgpf->ar, tgpf->v3d, tgpf->ob,
tgpf->gpl, point2D,
tgpf->depth_arr ? tgpf->depth_arr + i : NULL,
&pt->x);
pt->pressure = 1.0f;
pt->strength = 1.0f;;
pt->time = 0.0f;
pt->totweight = 0;
pt->weights = NULL;
}
/* smooth stroke */
float reduce = 0.0f;
float smoothfac = 1.0f;
for (int r = 0; r < 1; r++) {
for (int i = 0; i < gps->totpoints; i++) {
BKE_gp_smooth_stroke(gps, i, smoothfac - reduce);
}
reduce += 0.25f; // reduce the factor
}
/* if axis locked, reproject to plane locked */
if ((tgpf->lock_axis > GP_LOCKAXIS_NONE) && ((ts->gpencil_v3d_align & GP_PROJECT_DEPTH_VIEW) == 0)) {
float origin[3];
ED_gp_get_drawing_reference(tgpf->v3d, tgpf->scene, tgpf->ob, tgpf->gpl,
ts->gpencil_v3d_align, origin);
ED_gp_project_stroke_to_plane(tgpf->ob, tgpf->rv3d, gps, origin,
tgpf->lock_axis - 1, ts->gpencil_src);
}
/* if parented change position relative to parent object */
for (int a = 0; a < tgpf->sbuffer_size; a++) {
pt = &gps->points[a];
gp_apply_parent_point(tgpf->ob, tgpf->gpd, tgpf->gpl, pt);
}
/* simplify stroke */
for (int b = 0; b < tgpf->fill_simplylvl; b++) {
BKE_gpencil_simplify_fixed(tgpf->gpl, gps);
}
}
/* ----------------------- */
/* Drawing */
/* Helper: Draw status message while the user is running the operator */
static void gpencil_fill_status_indicators(tGPDfill *tgpf)
{
char status_str[UI_MAX_DRAW_STR];
BLI_snprintf(status_str, sizeof(status_str), IFACE_("Fill: ESC/RMB cancel, LMB Fill, Shift Draw on Back"));
ED_area_headerprint(tgpf->sa, status_str);
}
/* draw boundary lines to see fill limits */
static void gpencil_draw_boundary_lines(const bContext *UNUSED(C), tGPDfill *tgpf)
{
if (!tgpf->gpd) {
return;
}
float ink[4] = { 1.0f, 0.0f, 0.0f, 1.0f };
gp_draw_datablock(tgpf, ink);
}
/* Drawing callback for modal operator in 3d mode */
static void gpencil_fill_draw_3d(const bContext *C, ARegion *UNUSED(ar), void *arg)
{
tGPDfill *tgpf = (tGPDfill *)arg;
/* draw only in the region that originated operator. This is required for multiwindow */
ARegion *ar = CTX_wm_region(C);
if (ar != tgpf->ar) {
return;
}
gpencil_draw_boundary_lines(C, tgpf);
}
/* check if context is suitable for filling */
static int gpencil_fill_poll(bContext *C)
{
if (ED_operator_regionactive(C)) {
ScrArea *sa = CTX_wm_area(C);
if (sa->spacetype == SPACE_VIEW3D) {
return 1;
}
else {
CTX_wm_operator_poll_msg_set(C, "Active region not valid for filling operator");
return 0;
}
}
else {
CTX_wm_operator_poll_msg_set(C, "Active region not set");
return 0;
}
}
/* Allocate memory and initialize values */
static tGPDfill *gp_session_init_fill(bContext *C, wmOperator *UNUSED(op))
{
tGPDfill *tgpf = MEM_callocN(sizeof(tGPDfill), "GPencil Fill Data");
/* define initial values */
ToolSettings *ts = CTX_data_tool_settings(C);
bGPdata *gpd = CTX_data_gpencil_data(C);
Main *bmain = CTX_data_main(C);
/* set current scene and window info */
tgpf->scene = CTX_data_scene(C);
tgpf->ob = CTX_data_active_object(C);
tgpf->sa = CTX_wm_area(C);
tgpf->ar = CTX_wm_region(C);
tgpf->rv3d = tgpf->ar->regiondata;
tgpf->v3d = tgpf->sa->spacedata.first;
tgpf->depsgraph = CTX_data_depsgraph(C);
tgpf->win = CTX_wm_window(C);
/* set GP datablock */
tgpf->gpd = gpd;
tgpf->gpl = BKE_gpencil_layer_getactive(gpd);
/* get palette and color info */
bGPDpaletteref *palslot = BKE_gpencil_paletteslot_validate(bmain, gpd);
tgpf->palette = palslot->palette;
tgpf->palcolor = BKE_palette_color_get_active(tgpf->palette);
tgpf->lock_axis = ts->gp_sculpt.lock_axis;
tgpf->oldkey = -1;
tgpf->sbuffer_size = 0;
tgpf->sbuffer = NULL;
tgpf->depth_arr = NULL;
/* save filling parameters */
Brush *brush = BKE_brush_getactive_gpencil(ts);
tgpf->flag = brush->gp_flag;
tgpf->fill_leak = brush->gp_fill_leak;
tgpf->fill_threshold = brush->gp_fill_threshold;
tgpf->fill_simplylvl = brush->gp_fill_simplylvl;
tgpf->fill_draw_mode = brush->gp_fill_draw_mode;
/* init undo */
gpencil_undo_init(tgpf->gpd);
/* return context data for running operator */
return tgpf;
}
/* end operator */
static void gpencil_fill_exit(bContext *C, wmOperator *op)
{
Main *bmain = CTX_data_main(C);
Object *ob = CTX_data_active_object(C);
/* clear undo stack */
gpencil_undo_finish();
/* restore cursor to indicate end of fill */
WM_cursor_modal_restore(CTX_wm_window(C));
tGPDfill *tgpf = op->customdata;
/* don't assume that operator data exists at all */
if (tgpf) {
/* clear status message area */
ED_area_headerprint(tgpf->sa, NULL);
MEM_SAFE_FREE(tgpf->sbuffer);
MEM_SAFE_FREE(tgpf->depth_arr);
/* remove drawing handler */
if (tgpf->draw_handle_3d) {
ED_region_draw_cb_exit(tgpf->ar->type, tgpf->draw_handle_3d);
}
/* delete temp image */
if (tgpf->ima) {
for (Image *ima = bmain->image.first; ima; ima = ima->id.next) {
if (ima == tgpf->ima) {
BLI_remlink(&bmain->image, ima);
BKE_image_free(tgpf->ima);
MEM_SAFE_FREE(tgpf->ima);
break;
}
}
}
/* finally, free memory used by temp data */
MEM_freeN(tgpf);
}
/* clear pointer */
op->customdata = NULL;
/* drawing batch cache is dirty now */
if ((ob) && (ob->type == OB_GPENCIL) && (ob->data)) {
bGPdata *gpd2 = ob->data;
BKE_gpencil_batch_cache_dirty(gpd2);
gpd2->flag |= GP_DATA_CACHE_IS_DIRTY;
}
WM_event_add_notifier(C, NC_GPENCIL | NA_EDITED, NULL);
}
static void gpencil_fill_cancel(bContext *C, wmOperator *op)
{
/* this is just a wrapper around exit() */
gpencil_fill_exit(C, op);
}
/* Init: Allocate memory and set init values */
static int gpencil_fill_init(bContext *C, wmOperator *op)
{
tGPDfill *tgpf;
/* check context */
tgpf = op->customdata = gp_session_init_fill(C, op);
if (tgpf == NULL) {
/* something wasn't set correctly in context */
gpencil_fill_exit(C, op);
return 0;
}
/* everything is now setup ok */
return 1;
}
/* start of interactive part of operator */
static int gpencil_fill_invoke(bContext *C, wmOperator *op, const wmEvent *UNUSED(event))
{
tGPDfill *tgpf = NULL;
/* try to initialize context data needed */
if (!gpencil_fill_init(C, op)) {
gpencil_fill_exit(C, op);
if (op->customdata)
MEM_freeN(op->customdata);
return OPERATOR_CANCELLED;
}
else {
tgpf = op->customdata;
}
/* Enable custom drawing handlers to show help lines */
if (tgpf->flag & GP_BRUSH_FILL_SHOW_HELPLINES) {
tgpf->draw_handle_3d = ED_region_draw_cb_activate(tgpf->ar->type, gpencil_fill_draw_3d, tgpf, REGION_DRAW_POST_VIEW);
}
WM_cursor_modal_set(CTX_wm_window(C), BC_PAINTBRUSHCURSOR);
gpencil_fill_status_indicators(tgpf);
BKE_gpencil_batch_cache_dirty(tgpf->gpd);
WM_event_add_notifier(C, NC_GPENCIL | NA_EDITED, NULL);
/* add a modal handler for this operator*/
WM_event_add_modal_handler(C, op);
return OPERATOR_RUNNING_MODAL;
}
/* events handling during interactive part of operator */
static int gpencil_fill_modal(bContext *C, wmOperator *op, const wmEvent *event)
{
tGPDfill *tgpf = op->customdata;
int estate = OPERATOR_PASS_THROUGH; /* default exit state - pass through */
switch (event->type) {
case ESCKEY:
case RIGHTMOUSE:
estate = OPERATOR_CANCELLED;
break;
case LEFTMOUSE:
tgpf->on_back = RNA_boolean_get(op->ptr, "on_back");
/* first time the event is not enabled to show help lines */
if ((tgpf->oldkey != -1) || ((tgpf->flag & GP_BRUSH_FILL_SHOW_HELPLINES) == 0)) {
ARegion *ar = BKE_area_find_region_xy(CTX_wm_area(C), RGN_TYPE_ANY, event->x, event->y);
if (ar) {
rcti region_rect;
bool in_bounds = false;
/* Perform bounds check */
ED_region_visible_rect(ar, &region_rect);
in_bounds = BLI_rcti_isect_pt_v(&region_rect, event->mval);
if ((in_bounds) && (ar->regiontype == RGN_TYPE_WINDOW)) {
tgpf->center[0] = event->mval[0];
tgpf->center[1] = event->mval[1];
/* save size (do not sub minsize data to get right mouse click position) */
tgpf->sizex = region_rect.xmax;
tgpf->sizey = region_rect.ymax;
/* render screen to temp image */
gp_render_offscreen(tgpf);
/* apply boundary fill */
gpencil_boundaryfill_area(tgpf);
/* clean borders to avoid infinite loops */
gpencil_clean_borders(tgpf);
/* analyze outline */
gpencil_get_outline_points(tgpf);
/* create array of points from stack */
gpencil_points_from_stack(tgpf);
/* create z-depth array for reproject */
gpencil_get_depth_array(tgpf);
/* create stroke and reproject */
gpencil_stroke_from_buffer(tgpf);
/* free temp stack data */
if (tgpf->stack) {
BLI_stack_free(tgpf->stack);
}
/* push undo data */
gpencil_undo_push(tgpf->gpd);
estate = OPERATOR_FINISHED;
}
else {
estate = OPERATOR_CANCELLED;
}
}
else {
estate = OPERATOR_CANCELLED;
}
}
tgpf->oldkey = event->type;
break;
}
/* process last operations before exiting */
switch (estate) {
case OPERATOR_FINISHED:
gpencil_fill_exit(C, op);
WM_event_add_notifier(C, NC_GPENCIL | NA_EDITED, NULL);
break;
case OPERATOR_CANCELLED:
gpencil_fill_exit(C, op);
break;
case OPERATOR_RUNNING_MODAL | OPERATOR_PASS_THROUGH:
break;
}
/* return status code */
return estate;
}
void GPENCIL_OT_fill(wmOperatorType *ot)
{
PropertyRNA *prop;
/* identifiers */
ot->name = "Grease Pencil Fill";
ot->idname = "GPENCIL_OT_fill";
ot->description = "Fill with color the shape formed by strokes";
/* api callbacks */
ot->invoke = gpencil_fill_invoke;
ot->modal = gpencil_fill_modal;
ot->poll = gpencil_fill_poll;
ot->cancel = gpencil_fill_cancel;
/* flags */
ot->flag = OPTYPE_UNDO | OPTYPE_BLOCKING;
prop = RNA_def_boolean(ot->srna, "on_back", false, "Draw On Back", "Send new stroke to Back");
RNA_def_property_flag(prop, PROP_SKIP_SAVE);
}