WIP: Warp tool
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Bill Kendrick
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1beaad3553
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1 changed files with 365 additions and 0 deletions
365
magic/src/WIP/warp.c
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365
magic/src/WIP/warp.c
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/*
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warp.c
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Warp Magic Tool Plugin
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Tux Paint - A simple drawing program for children.
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Copyright (c) 2023-2023 by Bill Kendrick and others; see AUTHORS.txt
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bill@newbreedsoftware.com
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https://tuxpaint.org/
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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(See COPYING.txt)
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Last updated: May 16, 2023
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*/
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#include <stdio.h>
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#include <string.h>
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#include "tp_magic_api.h"
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#include "SDL_image.h"
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#include "SDL_mixer.h"
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#include "SDL2_gfxPrimitives.h"
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enum {
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TOOL_WARP,
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NUM_TOOLS
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};
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char * warp_icons[NUM_TOOLS] = {
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"rainbow.png", // FIXME
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};
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char * warp_snd_fnames[NUM_TOOLS] = {
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"rainbow.ogg", // FIXME
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};
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char * warp_tool_names[NUM_TOOLS] = {
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gettext_noop("Warp"),
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};
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#define NUM_WARP_SIZES 4
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#define MAX_WARP_RADIUS 64
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#define WARP_MESH_RES 16
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typedef struct warp_mesh_s {
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int scr_x;
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int scr_y;
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float pt_x;
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float pt_y;
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} warp_mesh_t;
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/* Our globals: */
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static int warp_radius;
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int warp_mesh_w, warp_mesh_h;
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float warp_dx, warp_dy;
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static warp_mesh_t * * warp_mesh = NULL;
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static Mix_Chunk * warp_snd[NUM_TOOLS];
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int warp_init(magic_api * api, Uint32 disabled_features);
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Uint32 warp_api_version(void);
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int warp_get_tool_count(magic_api * api);
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SDL_Surface *warp_get_icon(magic_api * api, int which);
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char *warp_get_name(magic_api * api, int which);
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int warp_get_group(magic_api * api, int which);
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char *warp_get_description(magic_api * api, int which, int mode);
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static void warp_linecb(void *ptr, int which, SDL_Surface * canvas, SDL_Surface * last, int x, int y);
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void warp_drag(magic_api * api, int which, SDL_Surface * canvas,
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SDL_Surface * last, int ox, int oy, int x, int y, SDL_Rect * update_rect);
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void warp_click(magic_api * api, int which, int mode,
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SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect);
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void warp_release(magic_api * api, int which,
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SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect);
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void warp_shutdown(magic_api * api);
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void warp_set_color(magic_api * api, int which, SDL_Surface * canvas,
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SDL_Surface * last, Uint8 r, Uint8 g, Uint8 b, SDL_Rect * update_rect);
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int warp_requires_colors(magic_api * api, int which);
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void warp_switchin(magic_api * api, int which, int mode, SDL_Surface * canvas);
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void warp_switchout(magic_api * api, int which, int mode, SDL_Surface * canvas);
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int warp_modes(magic_api * api, int which);
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Uint8 warp_accepted_sizes(magic_api * api, int which, int mode);
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Uint8 warp_default_size(magic_api * api, int which, int mode);
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void warp_set_size(magic_api * api, int which, int mode, SDL_Surface * canvas, SDL_Surface * last, Uint8 size,
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SDL_Rect * update_rect);
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Uint32 warp_api_version(void)
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{
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return (TP_MAGIC_API_VERSION);
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}
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// Load our sfx:
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int warp_init(magic_api * api, Uint32 disabled_features ATTRIBUTE_UNUSED)
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{
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int i;
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char fname[1024];
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for (i = 0; i < NUM_TOOLS; i++) {
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snprintf(fname, sizeof(fname), "%ssounds/magic/%s", api->data_directory, warp_snd_fnames[i]);
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warp_snd[i] = Mix_LoadWAV(fname);
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}
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return (1);
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}
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// We have multiple tools:
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int warp_get_tool_count(magic_api * api ATTRIBUTE_UNUSED)
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{
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return NUM_TOOLS;
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}
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// Load our icons:
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SDL_Surface *warp_get_icon(magic_api * api, int which)
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{
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char fname[1024];
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snprintf(fname, sizeof(fname), "%simages/magic/%s", api->data_directory, warp_icons[which]);
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return (IMG_Load(fname));
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}
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// Return our names, localized:
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char *warp_get_name(magic_api * api ATTRIBUTE_UNUSED, int which)
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{
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return (strdup(gettext(warp_tool_names[which])));
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}
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// Return our group:
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int warp_get_group(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
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{
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return MAGIC_TYPE_PAINTING;
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}
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// Return our descriptions, localized:
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char *warp_get_description(magic_api * api ATTRIBUTE_UNUSED, int which, int mode ATTRIBUTE_UNUSED)
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{
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return (strdup(gettext_noop("Warp"))); // FIXME
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}
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// Affect the canvas on drag:
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void warp_drag(magic_api * api, int which, SDL_Surface * canvas,
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SDL_Surface * last, int ox, int oy, int x, int y, SDL_Rect * update_rect)
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{
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int xx, yy;
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float stroke_len;
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if (warp_mesh == NULL)
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return;
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if (ox == x && oy == y)
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return;
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stroke_len = sqrt((ox - x) * (ox - x) + (oy - y) * (oy - y));
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warp_dx = (float) (x - ox) / stroke_len;
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warp_dy = (float) (y - oy) / stroke_len;
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api->line(api, which, canvas, last, ox, oy, x, y, 1, warp_linecb);
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SDL_BlitSurface(last, NULL, canvas, NULL);
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for (yy = 0; yy < warp_mesh_h - 1; yy++) {
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for (xx = 0; xx < warp_mesh_w - 1; xx++) {
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/* FIXME: Just crib perspective_preview() from perspective.c? */
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/*
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Sint16 pts_x[4];
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Sint16 pts_y[4];
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pts_x[0] = (Sint16) warp_mesh[yy][xx].pt_x;
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pts_y[0] = (Sint16) warp_mesh[yy][xx].pt_y;
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pts_x[1] = (Sint16) warp_mesh[yy][xx + 1].pt_x;
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pts_y[1] = (Sint16) warp_mesh[yy][xx + 1].pt_y;
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pts_x[2] = (Sint16) warp_mesh[yy + 1][xx].pt_x;
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pts_y[2] = (Sint16) warp_mesh[yy + 1][xx].pt_y;
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pts_x[3] = (Sint16) warp_mesh[yy + 1][xx + 1].pt_x;
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pts_y[3] = (Sint16) warp_mesh[yy + 1][xx + 1].pt_y;
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filledPolygonColor(canvas, pts_x, pts_y, 4, api->getpixel(last, warp_mesh[yy][xx].scr_x, warp_mesh[yy][xx].scr_y));
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*/
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}
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}
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/*
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if (ox > x) {
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int tmp;
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tmp = ox;
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ox = x;
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x = tmp;
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}
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if (oy > y) {
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int tmp;
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tmp = oy;
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oy = x;
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y = tmp;
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}
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update_rect->x = x - warp_radius;
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update_rect->y = y - warp_radius;
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update_rect->w = warp_radius * 2;
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update_rect->h = warp_radius * 2;
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*/
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update_rect->x = 0;
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update_rect->y = 0;
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update_rect->w = canvas->w;
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update_rect->h = canvas->h;
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api->playsound(warp_snd[which], (x * 255) / canvas->w, 255);
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}
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static void warp_linecb(void *ptr, int which, SDL_Surface * canvas, SDL_Surface * last, int x, int y) {
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float intensity;
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magic_api *api = (magic_api *) ptr;
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int mx, my;
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float dx, dy;
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for (my = 0; my < warp_mesh_h; my++) {
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for (mx = 0; mx < warp_mesh_w; mx++) {
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if (api->in_circle(warp_mesh[my][mx].pt_x - x, warp_mesh[my][mx].pt_y - y, warp_radius)) {
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dx = warp_mesh[my][mx].pt_x - (float) x;
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dy = warp_mesh[my][mx].pt_y - (float) y;
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intensity = ((float) warp_radius - sqrt(dx * dx + dy * dy)) / (float) warp_radius;
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warp_mesh[my][mx].pt_x += (warp_dx * intensity);
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warp_mesh[my][mx].pt_y += (warp_dy * intensity);
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}
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}
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api->update_progress_bar();
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}
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}
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// Affect the canvas on click:
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void warp_click(magic_api * api, int which, int mode ATTRIBUTE_UNUSED,
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SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect)
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{
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if (warp_mesh == NULL)
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return;
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// FIXME
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warp_drag(api, which, canvas, last, x, y, x, y, update_rect);
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}
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void warp_release(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED,
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SDL_Surface * canvas ATTRIBUTE_UNUSED,
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SDL_Surface * last ATTRIBUTE_UNUSED,
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int x ATTRIBUTE_UNUSED, int y ATTRIBUTE_UNUSED, SDL_Rect * update_rect ATTRIBUTE_UNUSED)
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{
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}
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// Clean up
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void warp_shutdown(magic_api * api ATTRIBUTE_UNUSED)
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{
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int i;
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for (i = 0; i < NUM_TOOLS; i++) {
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if (warp_snd[i] != NULL)
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Mix_FreeChunk(warp_snd[i]);
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}
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}
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void warp_set_color(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED,
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SDL_Surface * canvas ATTRIBUTE_UNUSED, SDL_Surface * last ATTRIBUTE_UNUSED,
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Uint8 r ATTRIBUTE_UNUSED, Uint8 g ATTRIBUTE_UNUSED, Uint8 b ATTRIBUTE_UNUSED,
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SDL_Rect * update_rect ATTRIBUTE_UNUSED)
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{
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}
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int warp_requires_colors(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
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{
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return 0;
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}
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void warp_switchin(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED, SDL_Surface * canvas ATTRIBUTE_UNUSED)
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{
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int x, y;
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warp_mesh_w = (canvas->w / WARP_MESH_RES);
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warp_mesh_h = (canvas->h / WARP_MESH_RES);
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warp_mesh = (warp_mesh_t * *) malloc(sizeof(warp_mesh_t *) * warp_mesh_h);
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memset(warp_mesh, (int) NULL, sizeof(warp_mesh_t *) * warp_mesh_h);
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if (warp_mesh == NULL) {
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fprintf(stderr, "warp cannot allocate warp_mesh!\n");
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return;
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}
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for (y = 0; y < warp_mesh_h; y++) {
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warp_mesh[y] = (warp_mesh_t *) malloc(sizeof(warp_mesh_t) * warp_mesh_w);
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if (warp_mesh[y] == NULL) {
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fprintf(stderr, "warp cannot allocate warp_mesh!\n");
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return;
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}
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}
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for (y = 0; y < warp_mesh_h; y++) {
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for (x = 0; x < warp_mesh_w; x++) {
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warp_mesh[y][x].scr_x = x * WARP_MESH_RES;
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warp_mesh[y][x].scr_y = y * WARP_MESH_RES;
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warp_mesh[y][x].pt_x = x * WARP_MESH_RES;
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warp_mesh[y][x].pt_y = y * WARP_MESH_RES;
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}
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}
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}
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void warp_switchout(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED, SDL_Surface * canvas ATTRIBUTE_UNUSED)
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{
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int y;
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/* FIXME: Crashes! */
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return;
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if (warp_mesh != NULL) {
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for (y = 0; y < warp_mesh_h; y++) {
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if (warp_mesh[y] != NULL) {
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printf("freeing mesh row %d\n", y); fflush(stdout);
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free(warp_mesh);
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warp_mesh[y] = NULL;
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}
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}
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free(warp_mesh);
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warp_mesh = NULL;
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}
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}
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int warp_modes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
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{
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return (MODE_PAINT);
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}
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Uint8 warp_accepted_sizes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
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{
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return NUM_WARP_SIZES;
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}
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Uint8 warp_default_size(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
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{
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return (NUM_WARP_SIZES / 2);
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}
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void warp_set_size(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED,
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SDL_Surface * canvas ATTRIBUTE_UNUSED, SDL_Surface * last ATTRIBUTE_UNUSED, Uint8 size,
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SDL_Rect * update_rect ATTRIBUTE_UNUSED)
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{
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warp_radius = (size * MAX_WARP_RADIUS) / NUM_WARP_SIZES;
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}
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