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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.
*
*
* Contributor(s): Blender Foundation
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/windowmanager/intern/wm_gesture.c
* \ingroup wm
*
* Gestures (cursor motions) creating, evaluating and drawing, shared between operators.
*/
#include "DNA_screen_types.h"
#include "DNA_vec_types.h"
#include "DNA_userdef_types.h"
#include "DNA_windowmanager_types.h"
#include "MEM_guardedalloc.h"
#include "BLI_bitmap_draw_2d.h"
#include "BLI_blenlib.h"
#include "BLI_math.h"
#include "BLI_utildefines.h"
#include "BLI_lasso.h"
#include "BKE_context.h"
#include "WM_api.h"
#include "WM_types.h"
#include "wm.h"
#include "wm_subwindow.h"
#include "wm_draw.h"
#include "GPU_basic_shader.h"
#include "BIF_glutil.h"
/* context checked on having screen, window and area */
wmGesture *WM_gesture_new(bContext *C, const wmEvent *event, int type)
{
wmGesture *gesture = MEM_callocN(sizeof(wmGesture), "new gesture");
wmWindow *window = CTX_wm_window(C);
ARegion *ar = CTX_wm_region(C);
int sx, sy;
BLI_addtail(&window->gesture, gesture);
gesture->type = type;
gesture->event_type = event->type;
gesture->swinid = ar->swinid; /* means only in area-region context! */
wm_subwindow_origin_get(window, gesture->swinid, &sx, &sy);
if (ELEM(type, WM_GESTURE_RECT, WM_GESTURE_CROSS_RECT, WM_GESTURE_TWEAK,
WM_GESTURE_CIRCLE, WM_GESTURE_STRAIGHTLINE))
{
rcti *rect = MEM_callocN(sizeof(rcti), "gesture rect new");
gesture->customdata = rect;
rect->xmin = event->x - sx;
rect->ymin = event->y - sy;
if (type == WM_GESTURE_CIRCLE) {
#ifdef GESTURE_MEMORY
rect->xmax = circle_select_size;
#else
rect->xmax = 25; // XXX temp
#endif
}
else {
rect->xmax = event->x - sx;
rect->ymax = event->y - sy;
}
}
else if (ELEM(type, WM_GESTURE_LINES, WM_GESTURE_LASSO)) {
short *lasso;
gesture->customdata = lasso = MEM_callocN(2 * sizeof(short) * WM_LASSO_MIN_POINTS, "lasso points");
lasso[0] = event->x - sx;
lasso[1] = event->y - sy;
gesture->points = 1;
gesture->size = WM_LASSO_MIN_POINTS;
}
return gesture;
}
void WM_gesture_end(bContext *C, wmGesture *gesture)
{
wmWindow *win = CTX_wm_window(C);
if (win->tweak == gesture)
win->tweak = NULL;
BLI_remlink(&win->gesture, gesture);
MEM_freeN(gesture->customdata);
if (gesture->userdata) {
MEM_freeN(gesture->userdata);
}
MEM_freeN(gesture);
}
void WM_gestures_remove(bContext *C)
{
wmWindow *win = CTX_wm_window(C);
while (win->gesture.first)
WM_gesture_end(C, win->gesture.first);
}
/* tweak and line gestures */
int wm_gesture_evaluate(wmGesture *gesture)
{
if (gesture->type == WM_GESTURE_TWEAK) {
rcti *rect = gesture->customdata;
int dx = BLI_rcti_size_x(rect);
int dy = BLI_rcti_size_y(rect);
if (abs(dx) + abs(dy) > U.tweak_threshold) {
int theta = iroundf(4.0f * atan2f((float)dy, (float)dx) / (float)M_PI);
int val = EVT_GESTURE_W;
if (theta == 0) val = EVT_GESTURE_E;
else if (theta == 1) val = EVT_GESTURE_NE;
else if (theta == 2) val = EVT_GESTURE_N;
else if (theta == 3) val = EVT_GESTURE_NW;
else if (theta == -1) val = EVT_GESTURE_SE;
else if (theta == -2) val = EVT_GESTURE_S;
else if (theta == -3) val = EVT_GESTURE_SW;
#if 0
/* debug */
if (val == 1) printf("tweak north\n");
if (val == 2) printf("tweak north-east\n");
if (val == 3) printf("tweak east\n");
if (val == 4) printf("tweak south-east\n");
if (val == 5) printf("tweak south\n");
if (val == 6) printf("tweak south-west\n");
if (val == 7) printf("tweak west\n");
if (val == 8) printf("tweak north-west\n");
#endif
return val;
}
}
return 0;
}
/* ******************* gesture draw ******************* */
static void wm_gesture_draw_rect(wmGesture *gt)
{
rcti *rect = (rcti *)gt->customdata;
glEnable(GL_BLEND);
glColor4f(1.0, 1.0, 1.0, 0.05);
glBegin(GL_QUADS);
glVertex2s(rect->xmax, rect->ymin);
glVertex2s(rect->xmax, rect->ymax);
glVertex2s(rect->xmin, rect->ymax);
glVertex2s(rect->xmin, rect->ymin);
glEnd();
glDisable(GL_BLEND);
GPU_basic_shader_bind(GPU_SHADER_LINE | GPU_SHADER_STIPPLE | GPU_SHADER_USE_COLOR);
glColor3ub(96, 96, 96);
GPU_basic_shader_line_stipple(1, 0xCCCC);
sdrawbox(rect->xmin, rect->ymin, rect->xmax, rect->ymax);
glColor3ub(255, 255, 255);
GPU_basic_shader_line_stipple(1, 0x3333);
sdrawbox(rect->xmin, rect->ymin, rect->xmax, rect->ymax);
GPU_basic_shader_bind(GPU_SHADER_USE_COLOR);
}
static void wm_gesture_draw_line(wmGesture *gt)
{
rcti *rect = (rcti *)gt->customdata;
GPU_basic_shader_bind(GPU_SHADER_LINE | GPU_SHADER_STIPPLE);
glColor3ub(96, 96, 96);
GPU_basic_shader_line_stipple(1, 0xAAAA);
sdrawline(rect->xmin, rect->ymin, rect->xmax, rect->ymax);
glColor3ub(255, 255, 255);
GPU_basic_shader_line_stipple(1, 0x5555);
sdrawline(rect->xmin, rect->ymin, rect->xmax, rect->ymax);
GPU_basic_shader_bind(GPU_SHADER_USE_COLOR);
}
static void wm_gesture_draw_circle(wmGesture *gt)
{
rcti *rect = (rcti *)gt->customdata;
glTranslatef((float)rect->xmin, (float)rect->ymin, 0.0f);
glEnable(GL_BLEND);
glColor4f(1.0, 1.0, 1.0, 0.05);
glutil_draw_filled_arc(0.0, M_PI * 2.0, rect->xmax, 40);
glDisable(GL_BLEND);
// for USE_GLSL works bad because of no relation between lines
GPU_basic_shader_bind(GPU_SHADER_LINE | GPU_SHADER_STIPPLE | GPU_SHADER_USE_COLOR);
glColor3ub(96, 96, 96);
GPU_basic_shader_line_stipple(1, 0xAAAA);
glutil_draw_lined_arc(0.0, M_PI * 2.0, rect->xmax, 40);
glColor3ub(255, 255, 255);
GPU_basic_shader_line_stipple(1, 0x5555);
glutil_draw_lined_arc(0.0, M_PI * 2.0, rect->xmax, 40);
GPU_basic_shader_bind(GPU_SHADER_USE_COLOR);
glTranslatef(-rect->xmin, -rect->ymin, 0.0f);
}
struct LassoFillData {
unsigned char *px;
int width;
};
static void draw_filled_lasso_px_cb(int x, int x_end, int y, void *user_data)
{
struct LassoFillData *data = user_data;
unsigned char *col = &(data->px[(y * data->width) + x]);
memset(col, 0x10, x_end - x);
}
static void draw_filled_lasso(wmWindow *win, wmGesture *gt)
{
const short *lasso = (short *)gt->customdata;
const int tot = gt->points;
int (*moves)[2] = MEM_mallocN(sizeof(*moves) * (tot + 1), __func__);
int i;
rcti rect;
rcti rect_win;
for (i = 0; i < tot; i++, lasso += 2) {
moves[i][0] = lasso[0];
moves[i][1] = lasso[1];
}
BLI_lasso_boundbox(&rect, (const int (*)[2])moves, tot);
wm_subwindow_rect_get(win, gt->swinid, &rect_win);
BLI_rcti_translate(&rect, rect_win.xmin, rect_win.ymin);
BLI_rcti_isect(&rect_win, &rect, &rect);
BLI_rcti_translate(&rect, -rect_win.xmin, -rect_win.ymin);
/* highly unlikely this will fail, but could crash if (tot == 0) */
if (BLI_rcti_is_empty(&rect) == false) {
const int w = BLI_rcti_size_x(&rect);
const int h = BLI_rcti_size_y(&rect);
unsigned char *pixel_buf = MEM_callocN(sizeof(*pixel_buf) * w * h, __func__);
struct LassoFillData lasso_fill_data = {pixel_buf, w};
fill_poly_v2i_n(
rect.xmin, rect.ymin, rect.xmax, rect.ymax,
(const int (*)[2])moves, tot,
draw_filled_lasso_px_cb, &lasso_fill_data);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glColor4f(1, 1, 1, 1);
glPixelTransferf(GL_RED_BIAS, 1);
glPixelTransferf(GL_GREEN_BIAS, 1);
glPixelTransferf(GL_BLUE_BIAS, 1);
GPU_basic_shader_bind(GPU_SHADER_TEXTURE_2D | GPU_SHADER_USE_COLOR);
glEnable(GL_BLEND);
glaDrawPixelsTex(rect.xmin, rect.ymin, w, h, GL_ALPHA, GL_UNSIGNED_BYTE, GL_NEAREST, pixel_buf);
glDisable(GL_BLEND);
GPU_basic_shader_bind(GPU_SHADER_USE_COLOR);
glPixelTransferf(GL_RED_BIAS, 0);
glPixelTransferf(GL_GREEN_BIAS, 0);
glPixelTransferf(GL_BLUE_BIAS, 0);
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
MEM_freeN(pixel_buf);
}
MEM_freeN(moves);
}
static void wm_gesture_draw_lasso(wmWindow *win, wmGesture *gt, bool filled)
{
const short *lasso = (short *)gt->customdata;
int i;
if (filled) {
draw_filled_lasso(win, gt);
}
// for USE_GLSL can't check this yet
GPU_basic_shader_bind(GPU_SHADER_LINE | GPU_SHADER_STIPPLE | GPU_SHADER_USE_COLOR);
glColor3ub(96, 96, 96);
GPU_basic_shader_line_stipple(1, 0xAAAA);
glBegin(GL_LINE_STRIP);
for (i = 0; i < gt->points; i++, lasso += 2)
glVertex2sv(lasso);
if (gt->type == WM_GESTURE_LASSO)
glVertex2sv((short *)gt->customdata);
glEnd();
glColor3ub(255, 255, 255);
GPU_basic_shader_line_stipple(1, 0x5555);
glBegin(GL_LINE_STRIP);
lasso = (short *)gt->customdata;
for (i = 0; i < gt->points; i++, lasso += 2)
glVertex2sv(lasso);
if (gt->type == WM_GESTURE_LASSO)
glVertex2sv((short *)gt->customdata);
glEnd();
GPU_basic_shader_bind(GPU_SHADER_USE_COLOR);
}
static void wm_gesture_draw_cross(wmWindow *win, wmGesture *gt)
{
rcti *rect = (rcti *)gt->customdata;
const int winsize_x = WM_window_pixels_x(win);
const int winsize_y = WM_window_pixels_y(win);
GPU_basic_shader_bind(GPU_SHADER_LINE | GPU_SHADER_STIPPLE | GPU_SHADER_USE_COLOR);
glColor3ub(96, 96, 96);
GPU_basic_shader_line_stipple(1, 0xCCCC);
sdrawline(rect->xmin - winsize_x, rect->ymin, rect->xmin + winsize_x, rect->ymin);
sdrawline(rect->xmin, rect->ymin - winsize_y, rect->xmin, rect->ymin + winsize_y);
glColor3ub(255, 255, 255);
GPU_basic_shader_line_stipple(1, 0x3333);
sdrawline(rect->xmin - winsize_x, rect->ymin, rect->xmin + winsize_x, rect->ymin);
sdrawline(rect->xmin, rect->ymin - winsize_y, rect->xmin, rect->ymin + winsize_y);
GPU_basic_shader_bind(GPU_SHADER_USE_COLOR);
}
/* called in wm_draw.c */
void wm_gesture_draw(wmWindow *win)
{
wmGesture *gt = (wmGesture *)win->gesture.first;
GPU_basic_shader_line_width(1);
for (; gt; gt = gt->next) {
/* all in subwindow space */
wmSubWindowSet(win, gt->swinid);
if (gt->type == WM_GESTURE_RECT)
wm_gesture_draw_rect(gt);
// else if (gt->type == WM_GESTURE_TWEAK)
// wm_gesture_draw_line(gt);
else if (gt->type == WM_GESTURE_CIRCLE)
wm_gesture_draw_circle(gt);
else if (gt->type == WM_GESTURE_CROSS_RECT) {
if (gt->mode == 1)
wm_gesture_draw_rect(gt);
else
wm_gesture_draw_cross(win, gt);
}
else if (gt->type == WM_GESTURE_LINES)
wm_gesture_draw_lasso(win, gt, false);
else if (gt->type == WM_GESTURE_LASSO)
wm_gesture_draw_lasso(win, gt, true);
else if (gt->type == WM_GESTURE_STRAIGHTLINE)
wm_gesture_draw_line(gt);
}
}
void wm_gesture_tag_redraw(bContext *C)
{
wmWindow *win = CTX_wm_window(C);
bScreen *screen = CTX_wm_screen(C);
ARegion *ar = CTX_wm_region(C);
if (screen)
screen->do_draw_gesture = true;
wm_tag_redraw_overlay(win, ar);
}
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