e5f948076b
New: Distort brush (Issue 34) New: Pixel scaler "Triple" for 3x3 zoom (Issue 147) New: Pixel scaler "Quadruple" for 4x4 zoom (Issue 151) New: Pixel scaler "Wide2" for 4x2 zoom (Issue 148) New: Pixel scaler "Tall2" for 2x4 zoom (Issue 149) Fix of very old bug: Resizing the image didn't mark the image 'modified since last save' git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@763 416bcca6-2ee7-4201-b75f-2eb2f807beb1
2692 lines
83 KiB
C
2692 lines
83 KiB
C
/* Grafx2 - The Ultimate 256-color bitmap paint program
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Copyright 2008 Franck Charlet
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Copyright 2007 Adrien Destugues
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Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
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Grafx2 is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2
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of the License.
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Grafx2 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 Grafx2; if not, see <http://www.gnu.org/licenses/> or
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write to the Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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********************************************************************************
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Drawing functions and effects.
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*/
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#include <string.h>
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#include <stdlib.h>
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#include <math.h>
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#include "global.h"
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#include "struct.h"
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#include "engine.h"
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#include "buttons.h"
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#include "pages.h"
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#include "errors.h"
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#include "sdlscreen.h"
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#include "graph.h"
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#include "misc.h"
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#include "pxsimple.h"
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#include "pxtall.h"
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#include "pxwide.h"
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#include "pxdouble.h"
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#include "pxtriple.h"
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#include "pxwide2.h"
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#include "pxtall2.h"
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#include "pxquad.h"
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#include "windows.h"
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// Generic pixel-drawing function.
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Func_pixel Pixel_figure;
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// Fonction qui met à jour la zone de l'image donnée en paramètre sur l'écran.
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// Tient compte du décalage X et Y et du zoom, et fait tous les controles nécessaires
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void Update_part_of_screen(short x, short y, short width, short height)
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{
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short effective_w, effective_h;
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short effective_X;
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short effective_Y;
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short diff;
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// Première étape, si L ou H est négatif, on doit remettre la zone à l'endroit
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if (width < 0)
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{
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x += width;
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width = - width;
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}
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if (height < 0)
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{
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y += height;
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height = - height;
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}
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// D'abord on met à jour dans la zone écran normale
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diff = x-Main_offset_X;
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if (diff<0)
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{
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effective_w = width + diff;
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effective_X = 0;
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}
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else
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{
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effective_w = width;
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effective_X = diff;
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}
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diff = y-Main_offset_Y;
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if (diff<0)
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{
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effective_h = height + diff;
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effective_Y = 0;
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}
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else
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{
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effective_h = height;
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effective_Y = diff;
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}
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// Normalement il ne faudrait pas updater au delà du split quand on est en mode loupe,
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// mais personne ne devrait demander d'update en dehors de cette limite, même le fill est contraint
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// a rester dans la zone visible de l'image
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// ...Sauf l'affichage de brosse en preview - yr
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if(Main_magnifier_mode && effective_X + effective_w > Main_separator_position)
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effective_w = Main_separator_position - effective_X;
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else if(effective_X + effective_w > Screen_width)
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effective_w = Screen_width - effective_X;
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if(effective_Y + effective_h > Menu_Y)
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effective_h = Menu_Y - effective_Y;
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/*
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SDL_Rect r;
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r.x=effective_X;
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r.y=effective_Y;
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r.h=effective_h;
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r.w=effective_w;
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SDL_FillRect(Screen_SDL,&r,3);
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*/
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Update_rect(effective_X,effective_Y,effective_w,effective_h);
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// Et ensuite dans la partie zoomée
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if(Main_magnifier_mode)
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{
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// Clipping en X
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effective_X = (x-Main_magnifier_offset_X)*Main_magnifier_factor;
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effective_Y = (y-Main_magnifier_offset_Y)*Main_magnifier_factor;
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effective_w = width * Main_magnifier_factor;
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effective_h = height * Main_magnifier_factor;
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if (effective_X < 0)
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{
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effective_w+=effective_X;
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if (effective_w<0)
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return;
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effective_X = Main_separator_position + SEPARATOR_WIDTH*Menu_factor_X;
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}
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else
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effective_X += Main_separator_position + SEPARATOR_WIDTH*Menu_factor_X;
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diff = effective_X+effective_w-Screen_width;
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if (diff>0)
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{
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effective_w -=diff;
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if (effective_w<0)
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return;
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}
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// Clipping en Y
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if (effective_Y < 0)
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{
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effective_h+=effective_Y;
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if (effective_h<0)
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return;
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effective_Y = 0;
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}
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diff = effective_Y+effective_h-Menu_Y;
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if (diff>0)
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{
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effective_h -=diff;
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if (effective_h<0)
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return;
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}
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// Très utile pour le debug :)
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/*SDL_Rect r;
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r.x=effective_X;
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r.y=effective_Y;
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r.h=effective_h;
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r.w=effective_w;
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SDL_FillRect(Screen_SDL,&r,3);*/
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Update_rect(effective_X,effective_Y,effective_w,effective_h);
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}
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}
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void Transform_point(short x, short y, float cos_a, float sin_a,
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short * rx, short * ry)
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{
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*rx=Round(((float)x*cos_a)+((float)y*sin_a));
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*ry=Round(((float)y*cos_a)-((float)x*sin_a));
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}
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//--------------------- Initialisation d'un mode vidéo -----------------------
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int Init_mode_video(int width, int height, int fullscreen, int pix_ratio)
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{
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int x_sensitivity;
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int y_sensitivity;
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int index;
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int factor;
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int pix_width;
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int pix_height;
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byte screen_changed;
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byte pixels_changed;
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int absolute_mouse_x=Mouse_X*Pixel_width;
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int absolute_mouse_y=Mouse_Y*Pixel_height;
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switch (pix_ratio)
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{
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default:
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case PIXEL_SIMPLE:
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pix_width=1;
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pix_height=1;
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break;
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case PIXEL_TALL:
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pix_width=1;
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pix_height=2;
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break;
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case PIXEL_WIDE:
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pix_width=2;
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pix_height=1;
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break;
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case PIXEL_DOUBLE:
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pix_width=2;
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pix_height=2;
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break;
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case PIXEL_TRIPLE:
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pix_width=3;
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pix_height=3;
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break;
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case PIXEL_WIDE2:
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pix_width=4;
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pix_height=2;
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break;
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case PIXEL_TALL2:
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pix_width=2;
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pix_height=4;
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break;
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case PIXEL_QUAD:
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pix_width=4;
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pix_height=4;
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break;
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}
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screen_changed = (Screen_width*Pixel_width!=width ||
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Screen_height*Pixel_height!=height ||
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Video_mode[Current_resolution].Fullscreen != fullscreen);
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// Valeurs raisonnables: minimum 320x200
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if (!fullscreen)
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{
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if (width < 320*pix_width)
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{
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width = 320*pix_width;
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screen_changed=1;
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}
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if (height < 200*pix_height)
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{
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height = 200*pix_height;
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screen_changed=1;
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}
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Video_mode[0].Width = width;
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Video_mode[0].Height = height;
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}
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else
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{
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if (width < 320*pix_width || height < 200*pix_height)
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return 1;
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}
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// La largeur doit être un multiple de 4
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#ifdef __amigaos4__
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// On AmigaOS the systems adds some more constraints on that ...
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width = (width + 15) & 0xFFFFFFF0;
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#else
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//width = (width + 3 ) & 0xFFFFFFFC;
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#endif
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pixels_changed = (Pixel_ratio!=pix_ratio);
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if (!screen_changed && !pixels_changed)
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return 0;
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if (screen_changed)
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{
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Set_mode_SDL(&width, &height,fullscreen);
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}
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Clear_border(MC_Black);
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if (screen_changed || pixels_changed)
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{
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Pixel_ratio=pix_ratio;
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Pixel_width=pix_width;
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Pixel_height=pix_height;
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switch (Pixel_ratio)
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{
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default:
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case PIXEL_SIMPLE:
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Pixel = Pixel_simple ;
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Read_pixel= Read_pixel_simple ;
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Display_screen = Display_part_of_screen_simple ;
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Block = Block_simple ;
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Pixel_preview_normal = Pixel_preview_normal_simple ;
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Pixel_preview_magnifier = Pixel_preview_magnifier_simple ;
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Horizontal_XOR_line = Horizontal_XOR_line_simple ;
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Vertical_XOR_line = Vertical_XOR_line_simple ;
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Display_brush_color = Display_brush_color_simple ;
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Display_brush_mono = Display_brush_mono_simple ;
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Clear_brush = Clear_brush_simple ;
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Remap_screen = Remap_screen_simple ;
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Display_line = Display_line_on_screen_simple ;
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Display_line_fast = Display_line_on_screen_simple ;
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Read_line = Read_line_screen_simple ;
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Display_zoomed_screen = Display_part_of_screen_scaled_simple ;
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Display_brush_color_zoom = Display_brush_color_zoom_simple ;
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Display_brush_mono_zoom = Display_brush_mono_zoom_simple ;
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Clear_brush_scaled = Clear_brush_scaled_simple ;
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Display_brush = Display_brush_simple ;
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break;
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case PIXEL_TALL:
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Pixel = Pixel_tall;
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Read_pixel= Read_pixel_tall;
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Display_screen = Display_part_of_screen_tall;
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Block = Block_tall;
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Pixel_preview_normal = Pixel_preview_normal_tall;
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Pixel_preview_magnifier = Pixel_preview_magnifier_tall;
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Horizontal_XOR_line = Horizontal_XOR_line_tall;
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Vertical_XOR_line = Vertical_XOR_line_tall;
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Display_brush_color = Display_brush_color_tall;
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Display_brush_mono = Display_brush_mono_tall;
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Clear_brush = Clear_brush_tall;
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Remap_screen = Remap_screen_tall;
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Display_line = Display_line_on_screen_tall;
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Display_line_fast = Display_line_on_screen_tall;
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Read_line = Read_line_screen_tall;
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Display_zoomed_screen = Display_part_of_screen_scaled_tall;
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Display_brush_color_zoom = Display_brush_color_zoom_tall;
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Display_brush_mono_zoom = Display_brush_mono_zoom_tall;
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Clear_brush_scaled = Clear_brush_scaled_tall;
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Display_brush = Display_brush_tall;
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break;
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case PIXEL_WIDE:
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Pixel = Pixel_wide ;
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Read_pixel= Read_pixel_wide ;
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Display_screen = Display_part_of_screen_wide ;
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Block = Block_wide ;
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Pixel_preview_normal = Pixel_preview_normal_wide ;
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Pixel_preview_magnifier = Pixel_preview_magnifier_wide ;
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Horizontal_XOR_line = Horizontal_XOR_line_wide ;
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Vertical_XOR_line = Vertical_XOR_line_wide ;
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Display_brush_color = Display_brush_color_wide ;
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Display_brush_mono = Display_brush_mono_wide ;
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Clear_brush = Clear_brush_wide ;
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Remap_screen = Remap_screen_wide ;
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Display_line = Display_line_on_screen_wide ;
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Display_line_fast = Display_line_on_screen_fast_wide ;
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Read_line = Read_line_screen_wide ;
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Display_zoomed_screen = Display_part_of_screen_scaled_wide ;
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Display_brush_color_zoom = Display_brush_color_zoom_wide ;
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Display_brush_mono_zoom = Display_brush_mono_zoom_wide ;
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Clear_brush_scaled = Clear_brush_scaled_wide ;
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Display_brush = Display_brush_wide ;
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break;
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case PIXEL_DOUBLE:
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Pixel = Pixel_double ;
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Read_pixel= Read_pixel_double ;
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Display_screen = Display_part_of_screen_double ;
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Block = Block_double ;
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Pixel_preview_normal = Pixel_preview_normal_double ;
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Pixel_preview_magnifier = Pixel_preview_magnifier_double ;
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Horizontal_XOR_line = Horizontal_XOR_line_double ;
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Vertical_XOR_line = Vertical_XOR_line_double ;
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Display_brush_color = Display_brush_color_double ;
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Display_brush_mono = Display_brush_mono_double ;
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Clear_brush = Clear_brush_double ;
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Remap_screen = Remap_screen_double ;
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Display_line = Display_line_on_screen_double ;
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Display_line_fast = Display_line_on_screen_fast_double ;
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Read_line = Read_line_screen_double ;
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Display_zoomed_screen = Display_part_of_screen_scaled_double ;
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Display_brush_color_zoom = Display_brush_color_zoom_double ;
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Display_brush_mono_zoom = Display_brush_mono_zoom_double ;
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Clear_brush_scaled = Clear_brush_scaled_double ;
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Display_brush = Display_brush_double ;
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break;
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case PIXEL_TRIPLE:
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Pixel = Pixel_triple ;
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Read_pixel= Read_pixel_triple ;
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Display_screen = Display_part_of_screen_triple ;
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Block = Block_triple ;
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Pixel_preview_normal = Pixel_preview_normal_triple ;
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Pixel_preview_magnifier = Pixel_preview_magnifier_triple ;
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Horizontal_XOR_line = Horizontal_XOR_line_triple ;
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Vertical_XOR_line = Vertical_XOR_line_triple ;
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Display_brush_color = Display_brush_color_triple ;
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Display_brush_mono = Display_brush_mono_triple ;
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Clear_brush = Clear_brush_triple ;
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Remap_screen = Remap_screen_triple ;
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Display_line = Display_line_on_screen_triple ;
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Display_line_fast = Display_line_on_screen_fast_triple ;
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Read_line = Read_line_screen_triple ;
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Display_zoomed_screen = Display_part_of_screen_scaled_triple ;
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Display_brush_color_zoom = Display_brush_color_zoom_triple ;
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Display_brush_mono_zoom = Display_brush_mono_zoom_triple ;
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Clear_brush_scaled = Clear_brush_scaled_triple ;
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Display_brush = Display_brush_triple ;
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break;
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case PIXEL_WIDE2:
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Pixel = Pixel_wide2 ;
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Read_pixel= Read_pixel_wide2 ;
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Display_screen = Display_part_of_screen_wide2 ;
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Block = Block_wide2 ;
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Pixel_preview_normal = Pixel_preview_normal_wide2 ;
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Pixel_preview_magnifier = Pixel_preview_magnifier_wide2 ;
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Horizontal_XOR_line = Horizontal_XOR_line_wide2 ;
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Vertical_XOR_line = Vertical_XOR_line_wide2 ;
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Display_brush_color = Display_brush_color_wide2 ;
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Display_brush_mono = Display_brush_mono_wide2 ;
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Clear_brush = Clear_brush_wide2 ;
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Remap_screen = Remap_screen_wide2 ;
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Display_line = Display_line_on_screen_wide2 ;
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Display_line_fast = Display_line_on_screen_fast_wide2 ;
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Read_line = Read_line_screen_wide2 ;
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Display_zoomed_screen = Display_part_of_screen_scaled_wide2 ;
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Display_brush_color_zoom = Display_brush_color_zoom_wide2 ;
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Display_brush_mono_zoom = Display_brush_mono_zoom_wide2 ;
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Clear_brush_scaled = Clear_brush_scaled_wide2 ;
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Display_brush = Display_brush_wide2 ;
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break;
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case PIXEL_TALL2:
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Pixel = Pixel_tall2 ;
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Read_pixel= Read_pixel_tall2 ;
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Display_screen = Display_part_of_screen_tall2 ;
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Block = Block_tall2 ;
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Pixel_preview_normal = Pixel_preview_normal_tall2 ;
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Pixel_preview_magnifier = Pixel_preview_magnifier_tall2 ;
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Horizontal_XOR_line = Horizontal_XOR_line_tall2 ;
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Vertical_XOR_line = Vertical_XOR_line_tall2 ;
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Display_brush_color = Display_brush_color_tall2 ;
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Display_brush_mono = Display_brush_mono_tall2 ;
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Clear_brush = Clear_brush_tall2 ;
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Remap_screen = Remap_screen_tall2 ;
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Display_line = Display_line_on_screen_tall2 ;
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Display_line_fast = Display_line_on_screen_fast_tall2 ;
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Read_line = Read_line_screen_tall2 ;
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Display_zoomed_screen = Display_part_of_screen_scaled_tall2 ;
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Display_brush_color_zoom = Display_brush_color_zoom_tall2 ;
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Display_brush_mono_zoom = Display_brush_mono_zoom_tall2 ;
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Clear_brush_scaled = Clear_brush_scaled_tall2 ;
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Display_brush = Display_brush_tall2 ;
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break;
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case PIXEL_QUAD:
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Pixel = Pixel_quad ;
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Read_pixel= Read_pixel_quad ;
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Display_screen = Display_part_of_screen_quad ;
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Block = Block_quad ;
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Pixel_preview_normal = Pixel_preview_normal_quad ;
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Pixel_preview_magnifier = Pixel_preview_magnifier_quad ;
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Horizontal_XOR_line = Horizontal_XOR_line_quad ;
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Vertical_XOR_line = Vertical_XOR_line_quad ;
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Display_brush_color = Display_brush_color_quad ;
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Display_brush_mono = Display_brush_mono_quad ;
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Clear_brush = Clear_brush_quad ;
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Remap_screen = Remap_screen_quad ;
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Display_line = Display_line_on_screen_quad ;
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Display_line_fast = Display_line_on_screen_fast_quad ;
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Read_line = Read_line_screen_quad ;
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Display_zoomed_screen = Display_part_of_screen_scaled_quad ;
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Display_brush_color_zoom = Display_brush_color_zoom_quad ;
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Display_brush_mono_zoom = Display_brush_mono_zoom_quad ;
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Clear_brush_scaled = Clear_brush_scaled_quad ;
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Display_brush = Display_brush_quad ;
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|
break;
|
|
}
|
|
}
|
|
Screen_width = width/Pixel_width;
|
|
Screen_height = height/Pixel_height;
|
|
|
|
// Taille des menus
|
|
if (Screen_width/320 > Screen_height/200)
|
|
factor=Screen_height/200;
|
|
else
|
|
factor=Screen_width/320;
|
|
|
|
switch (Config.Ratio)
|
|
{
|
|
case 1: // adapter tout
|
|
Menu_factor_X=factor;
|
|
Menu_factor_Y=factor;
|
|
break;
|
|
case 2: // adapter légèrement
|
|
Menu_factor_X=factor-1;
|
|
if (Menu_factor_X<1) Menu_factor_X=1;
|
|
Menu_factor_Y=factor-1;
|
|
if (Menu_factor_Y<1) Menu_factor_Y=1;
|
|
break;
|
|
default: // ne pas adapter
|
|
Menu_factor_X=1;
|
|
Menu_factor_Y=1;
|
|
}
|
|
if (Pixel_height>Pixel_width && Screen_width>=Menu_factor_X*2*320)
|
|
Menu_factor_X*=2;
|
|
else if (Pixel_width>Pixel_height && Screen_height>=Menu_factor_Y*2*200)
|
|
Menu_factor_Y*=2;
|
|
|
|
if (Horizontal_line_buffer)
|
|
free(Horizontal_line_buffer);
|
|
Horizontal_line_buffer=(byte *)malloc(Pixel_width*((Screen_width>Main_image_width)?Screen_width:Main_image_width));
|
|
|
|
Set_palette(Main_palette);
|
|
|
|
Current_resolution=0;
|
|
if (fullscreen)
|
|
{
|
|
for (index=1; index<Nb_video_modes; index++)
|
|
{
|
|
if (Video_mode[index].Width/Pixel_width==Screen_width &&
|
|
Video_mode[index].Height/Pixel_height==Screen_height)
|
|
{
|
|
Current_resolution=index;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
Change_palette_cells();
|
|
|
|
Menu_Y = Screen_height;
|
|
if (Menu_is_visible)
|
|
Menu_Y -= MENU_HEIGHT * Menu_factor_Y;
|
|
Menu_status_Y = Screen_height-(Menu_factor_Y<<3);
|
|
|
|
x_sensitivity = Config.Mouse_sensitivity_index_x;
|
|
y_sensitivity = Config.Mouse_sensitivity_index_y;
|
|
x_sensitivity>>=Mouse_fix_factor_X;
|
|
y_sensitivity>>=Mouse_fix_factor_Y;
|
|
Mouse_sensitivity(x_sensitivity?x_sensitivity:1,y_sensitivity?y_sensitivity:1);
|
|
|
|
Mouse_X=absolute_mouse_x/Pixel_width;
|
|
if (Mouse_X>=Screen_width)
|
|
Mouse_X=Screen_width-1;
|
|
Mouse_Y=absolute_mouse_y/Pixel_height;
|
|
if (Mouse_Y>=Screen_height)
|
|
Mouse_Y=Screen_height-1;
|
|
Set_mouse_position();
|
|
|
|
Spare_offset_X=0; // | Il faut penser à éviter les incohérences
|
|
Spare_offset_Y=0; // |- de décalage du brouillon par rapport à
|
|
Spare_magnifier_mode=0; // | la résolution.
|
|
|
|
if (Main_magnifier_mode)
|
|
{
|
|
Pixel_preview=Pixel_preview_magnifier;
|
|
}
|
|
else
|
|
{
|
|
Pixel_preview=Pixel_preview_normal;
|
|
// Recaler la vue (meme clipping que dans Scroll_screen())
|
|
if (Main_offset_X+Screen_width>Main_image_width)
|
|
Main_offset_X=Main_image_width-Screen_width;
|
|
if (Main_offset_X<0)
|
|
Main_offset_X=0;
|
|
if (Main_offset_Y+Menu_Y>Main_image_height)
|
|
Main_offset_Y=Main_image_height-Menu_Y;
|
|
if (Main_offset_Y<0)
|
|
Main_offset_Y=0;
|
|
}
|
|
|
|
Compute_magnifier_data();
|
|
if (Main_magnifier_mode)
|
|
Position_screen_according_to_zoom();
|
|
Compute_limits();
|
|
Compute_paintbrush_coordinates();
|
|
Display_all_screen();
|
|
|
|
Resize_width=0;
|
|
Resize_height=0;
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
// -- Redimentionner l'image (nettoie l'écran virtuel) --
|
|
|
|
void Resize_image(word chosen_width,word chosen_height)
|
|
{
|
|
word old_width=Main_image_width;
|
|
word old_height=Main_image_height;
|
|
|
|
// +-+-+
|
|
// |C| | A+B+C = Ancienne image
|
|
// +-+A|
|
|
// |B| | C = Nouvelle image
|
|
// +-+-+
|
|
|
|
if (Backup_with_new_dimensions(1,chosen_width,chosen_height))
|
|
{
|
|
// La nouvelle page a pu être allouée, elle est pour l'instant pleine de
|
|
// 0s. Elle fait Main_image_width de large.
|
|
|
|
Main_image_is_modified=1;
|
|
|
|
// On copie donc maintenant la partie C dans la nouvelle image.
|
|
Copy_part_of_image_to_another(
|
|
Screen_backup,0,0,Min(old_width,Main_image_width),
|
|
Min(old_height,Main_image_height),old_width,
|
|
Main_screen,0,0,Main_image_width);
|
|
}
|
|
else
|
|
{
|
|
// Afficher un message d'erreur
|
|
Display_cursor();
|
|
Message_out_of_memory();
|
|
Hide_cursor();
|
|
}
|
|
}
|
|
|
|
|
|
|
|
void Remap_picture(void)
|
|
{
|
|
short x_pos; // Variable de balayage de la brosse
|
|
short y_pos; // Variable de balayage de la brosse
|
|
byte used[256]; // Tableau de booléens "La couleur est utilisée"
|
|
int color;
|
|
|
|
// On commence par initialiser le tableau de booléens à faux
|
|
for (color=0;color<=255;color++)
|
|
used[color]=0;
|
|
|
|
// On calcule la table d'utilisation des couleurs
|
|
for (y_pos=0;y_pos<Spare_image_height;y_pos++)
|
|
for (x_pos=0;x_pos<Spare_image_width;x_pos++)
|
|
used[Read_pixel_from_spare_screen(x_pos,y_pos)]=1;
|
|
|
|
// On va maintenant se servir de la table "used" comme table de
|
|
// conversion: pour chaque indice, la table donne une couleur de
|
|
// remplacement.
|
|
// Note : Seules les couleurs utilisées on besoin d'êtres recalculées: les
|
|
// autres ne seront jamais consultées dans la nouvelle table de
|
|
// conversion puisque elles n'existent pas dans l'image, donc elles
|
|
// ne seront pas utilisées par Remap_general_lowlevel.
|
|
for (color=0;color<=255;color++)
|
|
if (used[color])
|
|
used[color]=Best_color(Spare_palette[color].R,Spare_palette[color].G,Spare_palette[color].B);
|
|
|
|
// Maintenant qu'on a une super table de conversion qui n'a que le nom
|
|
// qui craint un peu, on peut faire l'échange dans la brosse de toutes les
|
|
// teintes.
|
|
Remap_general_lowlevel(used,Spare_screen,Spare_image_width,Spare_image_height,Spare_image_width);
|
|
}
|
|
|
|
|
|
|
|
void Get_colors_from_brush(void)
|
|
{
|
|
short x_pos; // Variable de balayage de la brosse
|
|
short y_pos; // Variable de balayage de la brosse
|
|
byte used[256]; // Tableau de booléens "La couleur est utilisée"
|
|
int color;
|
|
|
|
if (Confirmation_box("Modify current palette ?"))
|
|
{
|
|
Backup();
|
|
|
|
// On commence par initialiser le tableau de booléen à faux
|
|
for (color=0;color<=255;color++)
|
|
used[color]=0;
|
|
|
|
// On calcule la table d'utilisation des couleurs
|
|
for (y_pos=0;y_pos<Brush_height;y_pos++)
|
|
for (x_pos=0;x_pos<Brush_width;x_pos++)
|
|
used[Read_pixel_from_brush(x_pos,y_pos)]=1;
|
|
|
|
// On recopie dans la palette principale les teintes des couleurs utilisées
|
|
// dans la palette du brouillon
|
|
for (color=0;color<=255;color++)
|
|
if (used[color])
|
|
{
|
|
Main_palette[color].R=Spare_palette[color].R;
|
|
Main_palette[color].G=Spare_palette[color].G;
|
|
Main_palette[color].B=Spare_palette[color].B;
|
|
}
|
|
|
|
Set_palette(Main_palette);
|
|
Compute_optimal_menu_colors(Main_palette);
|
|
Hide_cursor();
|
|
Display_all_screen();
|
|
Display_menu();
|
|
Display_cursor();
|
|
|
|
Main_image_is_modified=1;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
////////////////////////////// GESTION DU FILLER /////////////////////////////
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
void Fill(short * top_reached , short * bottom_reached,
|
|
short * left_reached, short * right_reached)
|
|
//
|
|
// Cette fonction fait un remplissage classique d'une zone délimitée de
|
|
// l'image. Les limites employées sont Limit_top, Limit_bottom, Limit_left
|
|
// et Limit_right. Le point de départ du remplissage est Paintbrush_X,Paintbrush_Y
|
|
// et s'effectue en théorie sur la couleur 1 et emploie la couleur 2 pour le
|
|
// remplissage. Ces restrictions sont dûes à l'utilisation qu'on en fait dans
|
|
// la fonction principale "Fill_general", qui se charge de faire une gestion de
|
|
// tous les effets.
|
|
// Cette fonction ne doit pas être directement appelée.
|
|
//
|
|
{
|
|
short x_pos; // Abscisse de balayage du segment, utilisée lors de l'"affichage"
|
|
short line; // Ordonnée de la ligne en cours de traitement
|
|
short start_x; // Abscisse de départ du segment traité
|
|
short end_x; // Abscisse de fin du segment traité
|
|
int changes_made; // Booléen "On a fait une modif dans le dernier passage"
|
|
int can_propagate; // Booléen "On peut propager la couleur dans le segment"
|
|
short current_limit_bottom; // Intervalle vertical restreint
|
|
short current_limit_top;
|
|
int line_is_modified; // Booléen "On a fait une modif dans la ligne"
|
|
|
|
changes_made=1;
|
|
current_limit_top=Paintbrush_Y;
|
|
current_limit_bottom =Min(Paintbrush_Y+1,Limit_bottom);
|
|
*left_reached=Paintbrush_X;
|
|
*right_reached=Paintbrush_X+1;
|
|
Pixel_in_current_screen(Paintbrush_X,Paintbrush_Y,2);
|
|
|
|
while (changes_made)
|
|
{
|
|
changes_made=0;
|
|
|
|
for (line=current_limit_top;line<=current_limit_bottom;line++)
|
|
{
|
|
line_is_modified=0;
|
|
// On va traiter le cas de la ligne n° line.
|
|
|
|
// On commence le traitement à la gauche de l'écran
|
|
start_x=Limit_left;
|
|
|
|
// Pour chaque segment de couleur 1 que peut contenir la ligne
|
|
while (start_x<=Limit_right)
|
|
{
|
|
// On cherche son début
|
|
while((start_x<=Limit_right) &&
|
|
(Read_pixel_from_current_screen(start_x,line)!=1))
|
|
start_x++;
|
|
|
|
if (start_x<=Limit_right)
|
|
{
|
|
// Un segment de couleur 1 existe et commence à la position start_x.
|
|
// On va donc en chercher la fin.
|
|
for (end_x=start_x+1;(end_x<=Limit_right) &&
|
|
(Read_pixel_from_current_screen(end_x,line)==1);end_x++);
|
|
|
|
// On sait qu'il existe un segment de couleur 1 qui commence en
|
|
// start_x et qui se termine en end_x-1.
|
|
|
|
// On va maintenant regarder si une couleur sur la périphérie
|
|
// permet de colorier ce segment avec la couleur 2.
|
|
|
|
can_propagate=(
|
|
// Test de la présence d'un point à gauche du segment
|
|
((start_x>Limit_left) &&
|
|
(Read_pixel_from_current_screen(start_x-1,line)==2)) ||
|
|
// Test de la présence d'un point à droite du segment
|
|
((end_x-1<Limit_right) &&
|
|
(Read_pixel_from_current_screen(end_x ,line)==2))
|
|
);
|
|
|
|
// Test de la présence d'un point en haut du segment
|
|
if (!can_propagate && (line>Limit_top))
|
|
for (x_pos=start_x;x_pos<end_x;x_pos++)
|
|
if (Read_pixel_from_current_screen(x_pos,line-1)==2)
|
|
{
|
|
can_propagate=1;
|
|
break;
|
|
}
|
|
|
|
if (can_propagate)
|
|
{
|
|
if (start_x<*left_reached)
|
|
*left_reached=start_x;
|
|
if (end_x>*right_reached)
|
|
*right_reached=end_x;
|
|
// On remplit le segment de start_x à end_x-1.
|
|
for (x_pos=start_x;x_pos<end_x;x_pos++)
|
|
Pixel_in_current_screen(x_pos,line,2);
|
|
// On vient d'effectuer des modifications.
|
|
changes_made=1;
|
|
line_is_modified=1;
|
|
}
|
|
|
|
start_x=end_x+1;
|
|
}
|
|
}
|
|
|
|
// Si on est en bas, et qu'on peut se propager vers le bas...
|
|
if ( (line==current_limit_bottom) &&
|
|
(line_is_modified) &&
|
|
(current_limit_bottom<Limit_bottom) )
|
|
current_limit_bottom++; // On descend cette limite vers le bas
|
|
}
|
|
|
|
// Pour le prochain balayage vers le haut, on va se permettre d'aller
|
|
// voir une ligne plus haut.
|
|
// Si on ne le fait pas, et que la première ligne (current_limit_top)
|
|
// n'était pas modifiée, alors cette limite ne serait pas remontée, donc
|
|
// le filler ne progresserait pas vers le haut.
|
|
if (current_limit_top>Limit_top)
|
|
current_limit_top--;
|
|
|
|
for (line=current_limit_bottom;line>=current_limit_top;line--)
|
|
{
|
|
line_is_modified=0;
|
|
// On va traiter le cas de la ligne n° line.
|
|
|
|
// On commence le traitement à la gauche de l'écran
|
|
start_x=Limit_left;
|
|
|
|
// Pour chaque segment de couleur 1 que peut contenir la ligne
|
|
while (start_x<=Limit_right)
|
|
{
|
|
// On cherche son début
|
|
for (;(start_x<=Limit_right) &&
|
|
(Read_pixel_from_current_screen(start_x,line)!=1);start_x++);
|
|
|
|
if (start_x<=Limit_right)
|
|
{
|
|
// Un segment de couleur 1 existe et commence à la position start_x.
|
|
// On va donc en chercher la fin.
|
|
for (end_x=start_x+1;(end_x<=Limit_right) &&
|
|
(Read_pixel_from_current_screen(end_x,line)==1);end_x++);
|
|
|
|
// On sait qu'il existe un segment de couleur 1 qui commence en
|
|
// start_x et qui se termine en end_x-1.
|
|
|
|
// On va maintenant regarder si une couleur sur la périphérie
|
|
// permet de colorier ce segment avec la couleur 2.
|
|
|
|
can_propagate=(
|
|
// Test de la présence d'un point à gauche du segment
|
|
((start_x>Limit_left) &&
|
|
(Read_pixel_from_current_screen(start_x-1,line)==2)) ||
|
|
// Test de la présence d'un point à droite du segment
|
|
((end_x-1<Limit_right) &&
|
|
(Read_pixel_from_current_screen(end_x ,line)==2))
|
|
);
|
|
|
|
// Test de la présence d'un point en bas du segment
|
|
if (!can_propagate && (line<Limit_bottom))
|
|
for (x_pos=start_x;x_pos<end_x;x_pos++)
|
|
if (Read_pixel_from_current_screen(x_pos,line+1)==2)
|
|
{
|
|
can_propagate=1;
|
|
break;
|
|
}
|
|
|
|
if (can_propagate)
|
|
{
|
|
if (start_x<*left_reached)
|
|
*left_reached=start_x;
|
|
if (end_x>*right_reached)
|
|
*right_reached=end_x;
|
|
// On remplit le segment de start_x à end_x-1.
|
|
for (x_pos=start_x;x_pos<end_x;x_pos++)
|
|
Pixel_in_current_screen(x_pos,line,2);
|
|
// On vient d'effectuer des modifications.
|
|
changes_made=1;
|
|
line_is_modified=1;
|
|
}
|
|
|
|
start_x=end_x+1;
|
|
}
|
|
}
|
|
|
|
// Si on est en haut, et qu'on peut se propager vers le haut...
|
|
if ( (line==current_limit_top) &&
|
|
(line_is_modified) &&
|
|
(current_limit_top>Limit_top) )
|
|
current_limit_top--; // On monte cette limite vers le haut
|
|
}
|
|
}
|
|
|
|
*top_reached=current_limit_top;
|
|
*bottom_reached =current_limit_bottom;
|
|
(*right_reached)--;
|
|
} // end de la routine de remplissage "Fill"
|
|
|
|
|
|
void Fill_general(byte fill_color)
|
|
//
|
|
// Cette fonction fait un remplissage qui gère tous les effets. Elle fait
|
|
// appel à "Fill()".
|
|
//
|
|
{
|
|
byte cursor_shape_before_fill;
|
|
byte * old_fx_feedback_screen;
|
|
short x_pos,y_pos;
|
|
short top_reached ,bottom_reached;
|
|
short left_reached,right_reached;
|
|
byte replace_table[256];
|
|
|
|
|
|
// Avant toute chose, on vérifie que l'on n'est pas en train de remplir
|
|
// en dehors de l'image:
|
|
|
|
if ( (Paintbrush_X>=Limit_left) &&
|
|
(Paintbrush_X<=Limit_right) &&
|
|
(Paintbrush_Y>=Limit_top) &&
|
|
(Paintbrush_Y<=Limit_bottom) )
|
|
{
|
|
// On suppose que le curseur est déjà caché.
|
|
// Hide_cursor();
|
|
|
|
// On va faire patienter l'utilisateur en lui affichant un joli petit
|
|
// sablier:
|
|
cursor_shape_before_fill=Cursor_shape;
|
|
Cursor_shape=CURSOR_SHAPE_HOURGLASS;
|
|
Display_cursor();
|
|
|
|
// On commence par effectuer un backup de l'image.
|
|
Backup();
|
|
|
|
// On fait attention au Feedback qui DOIT se faire avec le backup.
|
|
old_fx_feedback_screen=FX_feedback_screen;
|
|
FX_feedback_screen=Screen_backup;
|
|
|
|
// On va maintenant "épurer" la zone visible de l'image:
|
|
memset(replace_table,0,256);
|
|
replace_table[Read_pixel_from_current_screen(Paintbrush_X,Paintbrush_Y)]=1;
|
|
Replace_colors_within_limits(replace_table);
|
|
|
|
// On fait maintenant un remplissage classique de la couleur 1 avec la 2
|
|
Fill(&top_reached ,&bottom_reached,
|
|
&left_reached,&right_reached);
|
|
|
|
// On s'apprête à faire des opérations qui nécessitent un affichage. Il
|
|
// faut donc retirer de l'écran le curseur:
|
|
Hide_cursor();
|
|
Cursor_shape=cursor_shape_before_fill;
|
|
|
|
// Il va maintenant falloir qu'on "turn" ce gros caca "into" un truc qui
|
|
// ressemble un peu plus à ce à quoi l'utilisateur peut s'attendre.
|
|
if (top_reached>Limit_top)
|
|
Copy_part_of_image_to_another(Screen_backup, // source
|
|
Limit_left,Limit_top, // Pos X et Y dans source
|
|
(Limit_right-Limit_left)+1, // width copie
|
|
top_reached-Limit_top,// height copie
|
|
Main_image_width, // width de la source
|
|
Main_screen, // Destination
|
|
Limit_left,Limit_top, // Pos X et Y destination
|
|
Main_image_width); // width destination
|
|
if (bottom_reached<Limit_bottom)
|
|
Copy_part_of_image_to_another(Screen_backup,
|
|
Limit_left,bottom_reached+1,
|
|
(Limit_right-Limit_left)+1,
|
|
Limit_bottom-bottom_reached,
|
|
Main_image_width,Main_screen,
|
|
Limit_left,bottom_reached+1,Main_image_width);
|
|
if (left_reached>Limit_left)
|
|
Copy_part_of_image_to_another(Screen_backup,
|
|
Limit_left,top_reached,
|
|
left_reached-Limit_left,
|
|
(bottom_reached-top_reached)+1,
|
|
Main_image_width,Main_screen,
|
|
Limit_left,top_reached,Main_image_width);
|
|
if (right_reached<Limit_right)
|
|
Copy_part_of_image_to_another(Screen_backup,
|
|
right_reached+1,top_reached,
|
|
Limit_right-right_reached,
|
|
(bottom_reached-top_reached)+1,
|
|
Main_image_width,Main_screen,
|
|
right_reached+1,top_reached,Main_image_width);
|
|
|
|
for (y_pos=top_reached;y_pos<=bottom_reached;y_pos++)
|
|
for (x_pos=left_reached;x_pos<=right_reached;x_pos++)
|
|
if (Read_pixel_from_current_screen(x_pos,y_pos)==2)
|
|
{
|
|
// Si le pixel en cours de traitement a été touché par le Fill()
|
|
// on se doit d'afficher le pixel modifié par la couleur de
|
|
// remplissage:
|
|
|
|
// Ceci se fait en commençant par restaurer la couleur qu'il y avait
|
|
// précédemment (c'est important pour que les effets ne s'emmèlent
|
|
// pas le pinceaux)
|
|
Pixel_in_current_screen(x_pos,y_pos,Read_pixel_from_backup_screen(x_pos,y_pos));
|
|
|
|
// Enfin, on peut afficher le pixel, en le soumettant aux effets en
|
|
// cours:
|
|
Display_pixel(x_pos,y_pos,fill_color);
|
|
}
|
|
else
|
|
Pixel_in_current_screen(x_pos,y_pos,Read_pixel_from_backup_screen(x_pos,y_pos));
|
|
|
|
FX_feedback_screen=old_fx_feedback_screen;
|
|
|
|
// A la fin, on n'a pas besoin de réafficher le curseur puisque c'est
|
|
// l'appelant qui s'en charge, et on n'a pas besoin de rafficher l'image
|
|
// puisque les seuls points qui ont changé dans l'image ont été raffichés
|
|
// par l'utilisation de "Display_pixel()", et que les autres... eh bein
|
|
// on n'y a jamais touché à l'écran les autres: ils sont donc corrects.
|
|
|
|
Update_rect(0,0,0,0);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
////////////////// TRACéS DE FIGURES GéOMéTRIQUES STANDARDS //////////////////
|
|
////////////////////////// avec gestion de previews //////////////////////////
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
// Affichage d'un point de façon définitive (utilisation du pinceau)
|
|
void Pixel_figure_permanent(word x_pos,word y_pos,byte color)
|
|
{
|
|
Display_paintbrush(x_pos,y_pos,color,0);
|
|
}
|
|
|
|
// Affichage d'un point de façon définitive
|
|
void Pixel_clipped(word x_pos,word y_pos,byte color)
|
|
{
|
|
if ( (x_pos>=Limit_left) &&
|
|
(x_pos<=Limit_right) &&
|
|
(y_pos>=Limit_top) &&
|
|
(y_pos<=Limit_bottom) )
|
|
Display_pixel(x_pos,y_pos,color);
|
|
}
|
|
|
|
// Affichage d'un point pour une preview
|
|
void Pixel_figure_preview(word x_pos,word y_pos,byte color)
|
|
{
|
|
if ( (x_pos>=Limit_left) &&
|
|
(x_pos<=Limit_right) &&
|
|
(y_pos>=Limit_top) &&
|
|
(y_pos<=Limit_bottom) )
|
|
Pixel_preview(x_pos,y_pos,color);
|
|
}
|
|
// Affichage d'un point pour une preview, avec sa propre couleur
|
|
void Pixel_figure_preview_auto(word x_pos,word y_pos)
|
|
{
|
|
if ( (x_pos>=Limit_left) &&
|
|
(x_pos<=Limit_right) &&
|
|
(y_pos>=Limit_top) &&
|
|
(y_pos<=Limit_bottom) )
|
|
Pixel_preview(x_pos,y_pos,Read_pixel_from_current_screen(x_pos,y_pos));
|
|
}
|
|
|
|
// Affichage d'un point pour une preview en xor
|
|
void Pixel_figure_preview_xor(word x_pos,word y_pos,__attribute__((unused)) byte color)
|
|
{
|
|
if ( (x_pos>=Limit_left) &&
|
|
(x_pos<=Limit_right) &&
|
|
(y_pos>=Limit_top) &&
|
|
(y_pos<=Limit_bottom) )
|
|
Pixel_preview(x_pos,y_pos,~Read_pixel(x_pos-Main_offset_X,
|
|
y_pos-Main_offset_Y));
|
|
}
|
|
|
|
// Affichage d'un point pour une preview en xor additif
|
|
// (Il lit la couleur depuis la page backup)
|
|
void Pixel_figure_preview_xorback(word x_pos,word y_pos,__attribute__((unused)) byte color)
|
|
{
|
|
if ( (x_pos>=Limit_left) &&
|
|
(x_pos<=Limit_right) &&
|
|
(y_pos>=Limit_top) &&
|
|
(y_pos<=Limit_bottom) )
|
|
Pixel_preview(x_pos,y_pos,~Screen_backup[x_pos+y_pos*Main_image_width]);
|
|
}
|
|
|
|
|
|
// Effacement d'un point de preview
|
|
void Pixel_figure_clear_preview(word x_pos,word y_pos,__attribute__((unused)) byte color)
|
|
{
|
|
if ( (x_pos>=Limit_left) &&
|
|
(x_pos<=Limit_right) &&
|
|
(y_pos>=Limit_top) &&
|
|
(y_pos<=Limit_bottom) )
|
|
Pixel_preview(x_pos,y_pos,Read_pixel_from_current_screen(x_pos,y_pos));
|
|
}
|
|
|
|
// Affichage d'un point dans la brosse
|
|
void Pixel_figure_in_brush(word x_pos,word y_pos,byte color)
|
|
{
|
|
x_pos-=Brush_offset_X;
|
|
y_pos-=Brush_offset_Y;
|
|
if ( (x_pos<Brush_width) && // Les pos sont des word donc jamais < 0 ...
|
|
(y_pos<Brush_height) )
|
|
Pixel_in_brush(x_pos,y_pos,color);
|
|
}
|
|
|
|
|
|
// -- Tracer général d'un cercle vide -------------------------------------
|
|
|
|
void Draw_empty_circle_general(short center_x,short center_y,short radius,byte color)
|
|
{
|
|
short start_x;
|
|
short start_y;
|
|
short x_pos;
|
|
short y_pos;
|
|
|
|
// Ensuite, on va parcourire le quart haut gauche du cercle
|
|
start_x=center_x-radius;
|
|
start_y=center_y-radius;
|
|
|
|
// Affichage des extremitées du cercle sur chaque quart du cercle:
|
|
for (y_pos=start_y,Circle_cursor_Y=-radius;y_pos<center_y;y_pos++,Circle_cursor_Y++)
|
|
for (x_pos=start_x,Circle_cursor_X=-radius;x_pos<center_x;x_pos++,Circle_cursor_X++)
|
|
if (Pixel_in_circle())
|
|
{
|
|
// On vient de tomber sur le premier point sur la ligne horizontale
|
|
// qui fait partie du cercle.
|
|
// Donc on peut l'afficher (lui et ses copains symétriques)
|
|
|
|
// Quart Haut-gauche
|
|
Pixel_figure(x_pos,y_pos,color);
|
|
// Quart Haut-droite
|
|
Pixel_figure((center_x<<1)-x_pos,y_pos,color);
|
|
// Quart Bas-droite
|
|
Pixel_figure((center_x<<1)-x_pos,(center_y<<1)-y_pos,color);
|
|
// Quart Bas-gauche
|
|
Pixel_figure(x_pos,(center_y<<1)-y_pos,color);
|
|
|
|
// On peut ensuite afficher tous les points qui le suivent dont le
|
|
// pixel voisin du haut n'appartient pas au cercle:
|
|
for (Circle_cursor_Y--,x_pos++,Circle_cursor_X++;x_pos<center_x;x_pos++,Circle_cursor_X++)
|
|
if (!Pixel_in_circle())
|
|
{
|
|
// Quart Haut-gauche
|
|
Pixel_figure(x_pos,y_pos,color);
|
|
// Quart Haut-droite
|
|
Pixel_figure((center_x<<1)-x_pos,y_pos,color);
|
|
// Quart Bas-gauche
|
|
Pixel_figure(x_pos,(center_y<<1)-y_pos,color);
|
|
// Quart Bas-droite
|
|
Pixel_figure((center_x<<1)-x_pos,(center_y<<1)-y_pos,color);
|
|
}
|
|
else
|
|
break;
|
|
|
|
Circle_cursor_Y++;
|
|
break;
|
|
}
|
|
|
|
// On affiche à la fin les points cardinaux:
|
|
Pixel_figure(center_x,center_y-radius,color); // Haut
|
|
Pixel_figure(center_x-radius,center_y,color); // Gauche
|
|
Pixel_figure(center_x+radius,center_y,color); // Droite
|
|
Pixel_figure(center_x,center_y+radius,color); // Bas
|
|
|
|
if(Main_magnifier_mode) Update_part_of_screen(center_x-radius,center_y-radius,2*radius+1,2*radius+1);
|
|
}
|
|
|
|
// -- Tracé définitif d'un cercle vide --
|
|
|
|
void Draw_empty_circle_permanent(short center_x,short center_y,short radius,byte color)
|
|
{
|
|
Pixel_figure=Pixel_figure_permanent;
|
|
Draw_empty_circle_general(center_x,center_y,radius,color);
|
|
Update_part_of_screen(center_x - radius, center_y - radius, 2* radius+1, 2*radius+1);
|
|
}
|
|
|
|
// -- Tracer la preview d'un cercle vide --
|
|
|
|
void Draw_empty_circle_preview(short center_x,short center_y,short radius,byte color)
|
|
{
|
|
Pixel_figure=Pixel_figure_preview;
|
|
Draw_empty_circle_general(center_x,center_y,radius,color);
|
|
Update_part_of_screen(center_x - radius, center_y - radius, 2* radius+1, 2*radius+1);
|
|
}
|
|
|
|
// -- Effacer la preview d'un cercle vide --
|
|
|
|
void Hide_empty_circle_preview(short center_x,short center_y,short radius)
|
|
{
|
|
Pixel_figure=Pixel_figure_clear_preview;
|
|
Draw_empty_circle_general(center_x,center_y,radius,0);
|
|
Update_part_of_screen(center_x - radius, center_y - radius, 2* radius+1, 2*radius+1);
|
|
}
|
|
|
|
// -- Tracer un cercle plein --
|
|
|
|
void Draw_filled_circle(short center_x,short center_y,short radius,byte color)
|
|
{
|
|
short start_x;
|
|
short start_y;
|
|
short x_pos;
|
|
short y_pos;
|
|
short end_x;
|
|
short end_y;
|
|
|
|
start_x=center_x-radius;
|
|
start_y=center_y-radius;
|
|
end_x=center_x+radius;
|
|
end_y=center_y+radius;
|
|
|
|
// Correction des bornes d'après les limites
|
|
if (start_y<Limit_top)
|
|
start_y=Limit_top;
|
|
if (end_y>Limit_bottom)
|
|
end_y=Limit_bottom;
|
|
if (start_x<Limit_left)
|
|
start_x=Limit_left;
|
|
if (end_x>Limit_right)
|
|
end_x=Limit_right;
|
|
|
|
// Affichage du cercle
|
|
for (y_pos=start_y,Circle_cursor_Y=(long)start_y-center_y;y_pos<=end_y;y_pos++,Circle_cursor_Y++)
|
|
for (x_pos=start_x,Circle_cursor_X=(long)start_x-center_x;x_pos<=end_x;x_pos++,Circle_cursor_X++)
|
|
if (Pixel_in_circle())
|
|
Display_pixel(x_pos,y_pos,color);
|
|
|
|
Update_part_of_screen(start_x,start_y,end_x+1-start_x,end_y+1-start_y);
|
|
}
|
|
|
|
|
|
// -- Tracer général d'une ellipse vide -----------------------------------
|
|
|
|
void Draw_empty_ellipse_general(short center_x,short center_y,short horizontal_radius,short vertical_radius,byte color)
|
|
{
|
|
short start_x;
|
|
short start_y;
|
|
short x_pos;
|
|
short y_pos;
|
|
|
|
start_x=center_x-horizontal_radius;
|
|
start_y=center_y-vertical_radius;
|
|
|
|
// Calcul des limites de l'ellipse
|
|
Ellipse_compute_limites(horizontal_radius+1,vertical_radius+1);
|
|
|
|
// Affichage des extremitées de l'ellipse sur chaque quart de l'ellipse:
|
|
for (y_pos=start_y,Ellipse_cursor_Y=-vertical_radius;y_pos<center_y;y_pos++,Ellipse_cursor_Y++)
|
|
for (x_pos=start_x,Ellipse_cursor_X=-horizontal_radius;x_pos<center_x;x_pos++,Ellipse_cursor_X++)
|
|
if (Pixel_in_ellipse())
|
|
{
|
|
// On vient de tomber sur le premier point qui sur la ligne
|
|
// horizontale fait partie de l'ellipse.
|
|
|
|
// Donc on peut l'afficher (lui et ses copains symétriques)
|
|
|
|
// Quart Haut-gauche
|
|
Pixel_figure(x_pos,y_pos,color);
|
|
// Quart Haut-droite
|
|
Pixel_figure((center_x<<1)-x_pos,y_pos,color);
|
|
// Quart Bas-gauche
|
|
Pixel_figure(x_pos,(center_y<<1)-y_pos,color);
|
|
// Quart Bas-droite
|
|
Pixel_figure((center_x<<1)-x_pos,(center_y<<1)-y_pos,color);
|
|
|
|
// On peut ensuite afficher tous les points qui le suivent dont le
|
|
// pixel voisin du haut n'appartient pas à l'ellipse:
|
|
for (Ellipse_cursor_Y--,x_pos++,Ellipse_cursor_X++;x_pos<center_x;x_pos++,Ellipse_cursor_X++)
|
|
if (!Pixel_in_ellipse())
|
|
{
|
|
// Quart Haut-gauche
|
|
Pixel_figure(x_pos,y_pos,color);
|
|
// Quart Haut-droite
|
|
Pixel_figure((center_x<<1)-x_pos,y_pos,color);
|
|
// Quart Bas-gauche
|
|
Pixel_figure(x_pos,(center_y<<1)-y_pos,color);
|
|
// Quart Bas-droite
|
|
Pixel_figure((center_x<<1)-x_pos,(center_y<<1)-y_pos,color);
|
|
}
|
|
else
|
|
break;
|
|
|
|
Ellipse_cursor_Y++;
|
|
break;
|
|
}
|
|
|
|
// On affiche à la fin les points cardinaux:
|
|
|
|
// points verticaux:
|
|
x_pos=center_x;
|
|
Ellipse_cursor_X=-1;
|
|
for (y_pos=center_y+1-vertical_radius,Ellipse_cursor_Y=-vertical_radius+1;y_pos<center_y+vertical_radius;y_pos++,Ellipse_cursor_Y++)
|
|
if (!Pixel_in_ellipse())
|
|
Pixel_figure(x_pos,y_pos,color);
|
|
|
|
// points horizontaux:
|
|
y_pos=center_y;
|
|
Ellipse_cursor_Y=-1;
|
|
for (x_pos=center_x+1-horizontal_radius,Ellipse_cursor_X=-horizontal_radius+1;x_pos<center_x+horizontal_radius;x_pos++,Ellipse_cursor_X++)
|
|
if (!Pixel_in_ellipse())
|
|
Pixel_figure(x_pos,y_pos,color);
|
|
|
|
Pixel_figure(center_x,center_y-vertical_radius,color); // Haut
|
|
Pixel_figure(center_x-horizontal_radius,center_y,color); // Gauche
|
|
Pixel_figure(center_x+horizontal_radius,center_y,color); // Droite
|
|
Pixel_figure(center_x,center_y+vertical_radius,color); // Bas
|
|
|
|
Update_part_of_screen(center_x-horizontal_radius,center_y-vertical_radius,2*horizontal_radius+1,2*vertical_radius+1);
|
|
}
|
|
|
|
// -- Tracé définitif d'une ellipse vide --
|
|
|
|
void Draw_empty_ellipse_permanent(short center_x,short center_y,short horizontal_radius,short vertical_radius,byte color)
|
|
{
|
|
Pixel_figure=Pixel_figure_permanent;
|
|
Draw_empty_ellipse_general(center_x,center_y,horizontal_radius,vertical_radius,color);
|
|
Update_part_of_screen(center_x - horizontal_radius, center_y - vertical_radius, 2* horizontal_radius+1, 2*vertical_radius+1);
|
|
}
|
|
|
|
// -- Tracer la preview d'une ellipse vide --
|
|
|
|
void Draw_empty_ellipse_preview(short center_x,short center_y,short horizontal_radius,short vertical_radius,byte color)
|
|
{
|
|
Pixel_figure=Pixel_figure_preview;
|
|
Draw_empty_ellipse_general(center_x,center_y,horizontal_radius,vertical_radius,color);
|
|
Update_part_of_screen(center_x - horizontal_radius, center_y - vertical_radius, 2* horizontal_radius+1, 2*vertical_radius +1);
|
|
}
|
|
|
|
// -- Effacer la preview d'une ellipse vide --
|
|
|
|
void Hide_empty_ellipse_preview(short center_x,short center_y,short horizontal_radius,short vertical_radius)
|
|
{
|
|
Pixel_figure=Pixel_figure_clear_preview;
|
|
Draw_empty_ellipse_general(center_x,center_y,horizontal_radius,vertical_radius,0);
|
|
Update_part_of_screen(center_x - horizontal_radius, center_y - vertical_radius, 2* horizontal_radius+1, 2*vertical_radius+1);
|
|
}
|
|
|
|
// -- Tracer une ellipse pleine --
|
|
|
|
void Draw_filled_ellipse(short center_x,short center_y,short horizontal_radius,short vertical_radius,byte color)
|
|
{
|
|
short start_x;
|
|
short start_y;
|
|
short x_pos;
|
|
short y_pos;
|
|
short end_x;
|
|
short end_y;
|
|
|
|
start_x=center_x-horizontal_radius;
|
|
start_y=center_y-vertical_radius;
|
|
end_x=center_x+horizontal_radius;
|
|
end_y=center_y+vertical_radius;
|
|
|
|
// Calcul des limites de l'ellipse
|
|
Ellipse_compute_limites(horizontal_radius+1,vertical_radius+1);
|
|
|
|
// Correction des bornes d'après les limites
|
|
if (start_y<Limit_top)
|
|
start_y=Limit_top;
|
|
if (end_y>Limit_bottom)
|
|
end_y=Limit_bottom;
|
|
if (start_x<Limit_left)
|
|
start_x=Limit_left;
|
|
if (end_x>Limit_right)
|
|
end_x=Limit_right;
|
|
|
|
// Affichage de l'ellipse
|
|
for (y_pos=start_y,Ellipse_cursor_Y=start_y-center_y;y_pos<=end_y;y_pos++,Ellipse_cursor_Y++)
|
|
for (x_pos=start_x,Ellipse_cursor_X=start_x-center_x;x_pos<=end_x;x_pos++,Ellipse_cursor_X++)
|
|
if (Pixel_in_ellipse())
|
|
Display_pixel(x_pos,y_pos,color);
|
|
Update_part_of_screen(center_x-horizontal_radius,center_y-vertical_radius,2*horizontal_radius+1,2*vertical_radius+1);
|
|
}
|
|
|
|
/******************
|
|
* TRACÉ DE LIGNES *
|
|
******************/
|
|
|
|
void Clamp_coordinates_45_degrees(short ax, short ay, short* bx, short* by)
|
|
// Modifie bx et by pour que la ligne AXAY - BXBY soit
|
|
// - une droite horizontale
|
|
// - une droite verticale
|
|
// - une droite avec une pente de 45 degrés
|
|
{
|
|
int dx, dy;
|
|
float tan;
|
|
|
|
dx = (*bx)-ax;
|
|
dy = ay- *by; // On prend l'opposée car à l'écran les Y sont positifs en bas, et en maths, positifs en haut
|
|
|
|
if (dx==0) return; // On est en lockx et de toutes façons le X n'a pas bougé, on sort tout de suite pour éviter une méchante division par 0
|
|
|
|
tan = (float)dy/(float)dx;
|
|
|
|
if (tan <= 0.4142 && tan >= -0.4142)
|
|
{
|
|
// Cas 1 : Lock Y
|
|
*by = ay;
|
|
}
|
|
else if ( tan > 0.4142 && tan < 2.4142)
|
|
{
|
|
// Cas 2 : dy=dx
|
|
*by = (*by + ay - dx)/2;
|
|
*bx = ax + ay - *by;
|
|
}
|
|
else if (tan < -0.4142 && tan >= -2.4142)
|
|
{
|
|
// Cas 8 : dy = -dx
|
|
*by = (*by + ay + dx)/2;
|
|
*bx = ax - ay + *by;
|
|
}
|
|
else
|
|
{
|
|
// Cas 3 : Lock X
|
|
*bx = ax;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
// -- Tracer général d'une ligne ------------------------------------------
|
|
|
|
void Draw_line_general(short start_x,short start_y,short end_x,short end_y, byte color)
|
|
{
|
|
short x_pos,y_pos;
|
|
short incr_x,incr_y;
|
|
short i,cumul;
|
|
short delta_x,delta_y;
|
|
|
|
|
|
x_pos=start_x;
|
|
y_pos=start_y;
|
|
|
|
if (start_x<end_x)
|
|
{
|
|
incr_x=+1;
|
|
delta_x=end_x-start_x;
|
|
}
|
|
else
|
|
{
|
|
incr_x=-1;
|
|
delta_x=start_x-end_x;
|
|
}
|
|
|
|
if (start_y<end_y)
|
|
{
|
|
incr_y=+1;
|
|
delta_y=end_y-start_y;
|
|
}
|
|
else
|
|
{
|
|
incr_y=-1;
|
|
delta_y=start_y-end_y;
|
|
}
|
|
|
|
if (delta_y>delta_x)
|
|
{
|
|
cumul=delta_y>>1;
|
|
for (i=1; i<delta_y; i++)
|
|
{
|
|
y_pos+=incr_y;
|
|
cumul+=delta_x;
|
|
if (cumul>=delta_y)
|
|
{
|
|
cumul-=delta_y;
|
|
x_pos+=incr_x;
|
|
}
|
|
Pixel_figure(x_pos,y_pos,color);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
cumul=delta_x>>1;
|
|
for (i=1; i<delta_x; i++)
|
|
{
|
|
x_pos+=incr_x;
|
|
cumul+=delta_y;
|
|
if (cumul>=delta_x)
|
|
{
|
|
cumul-=delta_x;
|
|
y_pos+=incr_y;
|
|
}
|
|
Pixel_figure(x_pos,y_pos,color);
|
|
}
|
|
}
|
|
|
|
if ( (start_x!=end_x) || (start_y!=end_y) )
|
|
Pixel_figure(end_x,end_y,color);
|
|
|
|
}
|
|
|
|
// -- Tracer définitif d'une ligne --
|
|
|
|
void Draw_line_permanet(short start_x,short start_y,short end_x,short end_y, byte color)
|
|
{
|
|
|
|
int w = end_x-start_x, h = end_y - start_y;
|
|
Pixel_figure=Pixel_figure_permanent;
|
|
Draw_line_general(start_x,start_y,end_x,end_y,color);
|
|
Update_part_of_screen((start_x<end_x)?start_x:end_x,(start_y<end_y)?start_y:end_y,abs(w)+1,abs(h)+1);
|
|
}
|
|
|
|
// -- Tracer la preview d'une ligne --
|
|
|
|
void Draw_line_preview(short start_x,short start_y,short end_x,short end_y,byte color)
|
|
{
|
|
int w = end_x-start_x, h = end_y - start_y;
|
|
Pixel_figure=Pixel_figure_preview;
|
|
Draw_line_general(start_x,start_y,end_x,end_y,color);
|
|
Update_part_of_screen((start_x<end_x)?start_x:end_x,(start_y<end_y)?start_y:end_y,abs(w)+1,abs(h)+1);
|
|
}
|
|
|
|
// -- Tracer la preview d'une ligne en xor --
|
|
|
|
void Draw_line_preview_xor(short start_x,short start_y,short end_x,short end_y,byte color)
|
|
{
|
|
int w, h;
|
|
Pixel_figure=Pixel_figure_preview_xor;
|
|
Draw_line_general(start_x,start_y,end_x,end_y,color);
|
|
if (start_x<0)
|
|
start_x=0;
|
|
if (start_y<0)
|
|
start_y=0;
|
|
if (end_x<0)
|
|
end_x=0;
|
|
if (end_y<0)
|
|
end_y=0;
|
|
w = end_x-start_x;
|
|
h = end_y-start_y;
|
|
Update_part_of_screen((start_x<end_x)?start_x:end_x,(start_y<end_y)?start_y:end_y,abs(w)+1,abs(h)+1);
|
|
}
|
|
|
|
// -- Tracer la preview d'une ligne en xor additif --
|
|
|
|
void Draw_line_preview_xorback(short start_x,short start_y,short end_x,short end_y,byte color)
|
|
{
|
|
int w = end_x-start_x, h = end_y - start_y;
|
|
Pixel_figure=Pixel_figure_preview_xorback;
|
|
Draw_line_general(start_x,start_y,end_x,end_y,color);
|
|
Update_part_of_screen((start_x<end_x)?start_x:end_x,(start_y<end_y)?start_y:end_y,abs(w)+1,abs(h)+1);
|
|
}
|
|
|
|
// -- Effacer la preview d'une ligne --
|
|
|
|
void Hide_line_preview(short start_x,short start_y,short end_x,short end_y)
|
|
{
|
|
int w = end_x-start_x, h = end_y - start_y;
|
|
Pixel_figure=Pixel_figure_clear_preview;
|
|
Draw_line_general(start_x,start_y,end_x,end_y,0);
|
|
Update_part_of_screen((start_x<end_x)?start_x:end_x,(start_y<end_y)?start_y:end_y,abs(w)+1,abs(h)+1);
|
|
}
|
|
|
|
|
|
// -- Tracer un rectangle vide --
|
|
|
|
void Draw_empty_rectangle(short start_x,short start_y,short end_x,short end_y,byte color)
|
|
{
|
|
short temp;
|
|
short x_pos;
|
|
short y_pos;
|
|
|
|
|
|
// On vérifie que les bornes soient dans le bon sens:
|
|
if (start_x>end_x)
|
|
{
|
|
temp=start_x;
|
|
start_x=end_x;
|
|
end_x=temp;
|
|
}
|
|
if (start_y>end_y)
|
|
{
|
|
temp=start_y;
|
|
start_y=end_y;
|
|
end_y=temp;
|
|
}
|
|
|
|
// On trace le rectangle:
|
|
|
|
for (x_pos=start_x;x_pos<=end_x;x_pos++)
|
|
Display_paintbrush(x_pos,start_y,color,0);
|
|
|
|
for (y_pos=start_y+1;y_pos<end_y;y_pos++)
|
|
{
|
|
Display_paintbrush(start_x,y_pos,color,0);
|
|
Display_paintbrush( end_x,y_pos,color,0);
|
|
}
|
|
|
|
for (x_pos=start_x;x_pos<=end_x;x_pos++)
|
|
Display_paintbrush(x_pos, end_y,color,0);
|
|
#if defined(__macosx__) || defined(__FreeBSD__)
|
|
Update_part_of_screen(start_x,end_x,end_x-start_x,end_y-start_y);
|
|
#endif
|
|
}
|
|
|
|
// -- Tracer un rectangle plein --
|
|
|
|
void Draw_filled_rectangle(short start_x,short start_y,short end_x,short end_y,byte color)
|
|
{
|
|
short temp;
|
|
short x_pos;
|
|
short y_pos;
|
|
|
|
|
|
// On vérifie que les bornes sont dans le bon sens:
|
|
if (start_x>end_x)
|
|
{
|
|
temp=start_x;
|
|
start_x=end_x;
|
|
end_x=temp;
|
|
}
|
|
if (start_y>end_y)
|
|
{
|
|
temp=start_y;
|
|
start_y=end_y;
|
|
end_y=temp;
|
|
}
|
|
|
|
// Correction en cas de dépassement des limites de l'image
|
|
if (end_x>Limit_right)
|
|
end_x=Limit_right;
|
|
if (end_y>Limit_bottom)
|
|
end_y=Limit_bottom;
|
|
|
|
// On trace le rectangle:
|
|
for (y_pos=start_y;y_pos<=end_y;y_pos++)
|
|
for (x_pos=start_x;x_pos<=end_x;x_pos++)
|
|
// Display_pixel traite chaque pixel avec tous les effets ! (smear, ...)
|
|
// Donc on ne peut pas otimiser en traçant ligne par ligne avec memset :(
|
|
Display_pixel(x_pos,y_pos,color);
|
|
Update_part_of_screen(start_x,start_y,end_x-start_x,end_y-start_y);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
// -- Tracer une courbe de Bézier --
|
|
|
|
void Draw_curve_general(short x1, short y1,
|
|
short x2, short y2,
|
|
short x3, short y3,
|
|
short x4, short y4,
|
|
byte color)
|
|
{
|
|
float delta,t,t2,t3;
|
|
short x,y,old_x,old_y;
|
|
word i;
|
|
int cx[4];
|
|
int cy[4];
|
|
|
|
// Calcul des vecteurs de coefficients
|
|
cx[0]= - x1 + 3*x2 - 3*x3 + x4;
|
|
cx[1]= + 3*x1 - 6*x2 + 3*x3;
|
|
cx[2]= - 3*x1 + 3*x2;
|
|
cx[3]= + x1;
|
|
cy[0]= - y1 + 3*y2 - 3*y3 + y4;
|
|
cy[1]= + 3*y1 - 6*y2 + 3*y3;
|
|
cy[2]= - 3*y1 + 3*y2;
|
|
cy[3]= + y1;
|
|
|
|
// Traçage de la courbe
|
|
old_x=x1;
|
|
old_y=y1;
|
|
Pixel_figure(old_x,old_y,color);
|
|
delta=0.05; // 1.0/20
|
|
t=0;
|
|
for (i=1; i<=20; i++)
|
|
{
|
|
t=t+delta; t2=t*t; t3=t2*t;
|
|
x=Round(t3*cx[0] + t2*cx[1] + t*cx[2] + cx[3]);
|
|
y=Round(t3*cy[0] + t2*cy[1] + t*cy[2] + cy[3]);
|
|
Draw_line_general(old_x,old_y,x,y,color);
|
|
old_x=x;
|
|
old_y=y;
|
|
}
|
|
|
|
x = Min(Min(x1,x2),Min(x3,x4));
|
|
y = Min(Min(y1,y2),Min(y3,y4));
|
|
old_x = Max(Max(x1,x2),Max(x3,x4)) - x;
|
|
old_y = Max(Max(y1,y2),Max(y3,y4)) - y;
|
|
Update_part_of_screen(x,y,old_x+1,old_y+1);
|
|
}
|
|
|
|
// -- Tracer une courbe de Bézier définitivement --
|
|
|
|
void Draw_curve_permanent(short x1, short y1,
|
|
short x2, short y2,
|
|
short x3, short y3,
|
|
short x4, short y4,
|
|
byte color)
|
|
{
|
|
Pixel_figure=Pixel_figure_permanent;
|
|
Draw_curve_general(x1,y1,x2,y2,x3,y3,x4,y4,color);
|
|
}
|
|
|
|
// -- Tracer la preview d'une courbe de Bézier --
|
|
|
|
void Draw_curve_preview(short x1, short y1,
|
|
short x2, short y2,
|
|
short x3, short y3,
|
|
short x4, short y4,
|
|
byte color)
|
|
{
|
|
Pixel_figure=Pixel_figure_preview;
|
|
Draw_curve_general(x1,y1,x2,y2,x3,y3,x4,y4,color);
|
|
}
|
|
|
|
// -- Effacer la preview d'une courbe de Bézier --
|
|
|
|
void Hide_curve_preview(short x1, short y1,
|
|
short x2, short y2,
|
|
short x3, short y3,
|
|
short x4, short y4,
|
|
byte color)
|
|
{
|
|
Pixel_figure=Pixel_figure_clear_preview;
|
|
Draw_curve_general(x1,y1,x2,y2,x3,y3,x4,y4,color);
|
|
}
|
|
|
|
|
|
|
|
|
|
// -- Spray : un petit coup de Pschiitt! --
|
|
|
|
void Airbrush(short clicked_button)
|
|
{
|
|
short x_pos,y_pos;
|
|
short radius=Airbrush_size>>1;
|
|
long radius_squared=(long)radius*radius;
|
|
short index,count;
|
|
byte color_index;
|
|
byte direction;
|
|
|
|
|
|
Hide_cursor();
|
|
|
|
if (Airbrush_mode)
|
|
{
|
|
for (count=1; count<=Airbrush_mono_flow; count++)
|
|
{
|
|
x_pos=(rand()%Airbrush_size)-radius;
|
|
y_pos=(rand()%Airbrush_size)-radius;
|
|
if ( (x_pos*x_pos)+(y_pos*y_pos) <= radius_squared )
|
|
{
|
|
x_pos+=Paintbrush_X;
|
|
y_pos+=Paintbrush_Y;
|
|
if (clicked_button==1)
|
|
Display_paintbrush(x_pos,y_pos,Fore_color,0);
|
|
else
|
|
Display_paintbrush(x_pos,y_pos,Back_color,0);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// On essaye de se balader dans la table des flux de façon à ce que ce
|
|
// ne soit pas toujours la dernière couleur qui soit affichée en dernier
|
|
// Pour ça, on part d'une couleur au pif dans une direction aléatoire.
|
|
direction=rand()&1;
|
|
for (index=0,color_index=rand()/*%256*/; index<256; index++)
|
|
{
|
|
for (count=1; count<=Airbrush_multi_flow[color_index]; count++)
|
|
{
|
|
x_pos=(rand()%Airbrush_size)-radius;
|
|
y_pos=(rand()%Airbrush_size)-radius;
|
|
if ( (x_pos*x_pos)+(y_pos*y_pos) <= radius_squared )
|
|
{
|
|
x_pos+=Paintbrush_X;
|
|
y_pos+=Paintbrush_Y;
|
|
if (clicked_button==LEFT_SIDE)
|
|
Display_paintbrush(x_pos,y_pos,color_index,0);
|
|
else
|
|
Display_paintbrush(x_pos,y_pos,Back_color,0);
|
|
}
|
|
}
|
|
if (direction)
|
|
color_index++;
|
|
else
|
|
color_index--;
|
|
}
|
|
}
|
|
|
|
Display_cursor();
|
|
}
|
|
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
////////////////////////// GESTION DES DEGRADES //////////////////////////
|
|
//////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
// -- Gestion d'un dégradé de base (le plus moche) --
|
|
|
|
void Gradient_basic(long index,short x_pos,short y_pos)
|
|
{
|
|
long position;
|
|
|
|
// On fait un premier calcul partiel
|
|
position=(index*Gradient_bounds_range);
|
|
|
|
// On gère un déplacement au hasard
|
|
position+=(Gradient_total_range*(rand()%Gradient_random_factor)) >>6;
|
|
position-=(Gradient_total_range*Gradient_random_factor) >>7;
|
|
|
|
position/=Gradient_total_range;
|
|
|
|
// On va vérifier que nos petites idioties n'ont pas éjecté la valeur hors
|
|
// des valeurs autorisées par le dégradé défini par l'utilisateur.
|
|
|
|
if (position<0)
|
|
position=0;
|
|
else if (position>=Gradient_bounds_range)
|
|
position=Gradient_bounds_range-1;
|
|
|
|
// On ramène ensuite la position dans le dégradé vers un numéro de couleur
|
|
if (Gradient_is_inverted)
|
|
Gradient_pixel(x_pos,y_pos,Gradient_upper_bound-position);
|
|
else
|
|
Gradient_pixel(x_pos,y_pos,Gradient_lower_bound+position);
|
|
}
|
|
|
|
|
|
// -- Gestion d'un dégradé par trames simples --
|
|
|
|
void Gradient_dithered(long index,short x_pos,short y_pos)
|
|
{
|
|
long position_in_gradient;
|
|
long position_in_segment;
|
|
|
|
//
|
|
// But de l'opération: en plus de calculer la position de base (désignée
|
|
// dans cette procédure par "position_in_gradient", on calcule la position
|
|
// de l'indice dans le schéma suivant:
|
|
//
|
|
// | Les indices qui traînent de ce côté du segment se voient subir
|
|
// | une incrémentation conditionnelle à leur position dans l'écran.
|
|
// v
|
|
// |---|---|---|---- - - -
|
|
// ^
|
|
// |_ Les indices qui traînent de ce côté du segment se voient subir une
|
|
// décrémentation conditionnelle à leur position dans l'écran.
|
|
|
|
// On fait d'abord un premier calcul partiel
|
|
position_in_gradient=(index*Gradient_bounds_range);
|
|
|
|
// On gère un déplacement au hasard...
|
|
position_in_gradient+=(Gradient_total_range*(rand()%Gradient_random_factor)) >>6;
|
|
position_in_gradient-=(Gradient_total_range*Gradient_random_factor) >>7;
|
|
|
|
if (position_in_gradient<0)
|
|
position_in_gradient=0;
|
|
|
|
// ... qui nous permet de calculer la position dans le segment
|
|
position_in_segment=((position_in_gradient<<2)/Gradient_total_range)&3;
|
|
|
|
// On peut ensuite terminer le calcul de l'indice dans le dégradé
|
|
position_in_gradient/=Gradient_total_range;
|
|
|
|
// On va pouvoir discuter de la valeur de position_in_gradient en fonction
|
|
// de la position dans l'écran et de la position_in_segment.
|
|
|
|
switch (position_in_segment)
|
|
{
|
|
case 0 : // On est sur la gauche du segment
|
|
if (((x_pos+y_pos)&1)==0)
|
|
position_in_gradient--;
|
|
break;
|
|
|
|
// On n'a pas à traiter les cas 1 et 2 car ils représentent des valeurs
|
|
// suffisament au centre du segment pour ne pas avoir à subir la trame
|
|
|
|
case 3 : // On est sur la droite du segment
|
|
if (((x_pos+y_pos)&1)!=0) // Note: on doit faire le test inverse au cas gauche pour synchroniser les 2 côtés de la trame.
|
|
position_in_gradient++;
|
|
}
|
|
|
|
// On va vérifier que nos petites idioties n'ont pas éjecté la valeur hors
|
|
// des valeurs autorisées par le dégradé défini par l'utilisateur.
|
|
|
|
if (position_in_gradient<0)
|
|
position_in_gradient=0;
|
|
else if (position_in_gradient>=Gradient_bounds_range)
|
|
position_in_gradient=Gradient_bounds_range-1;
|
|
|
|
// On ramène ensuite la position dans le dégradé vers un numéro de couleur
|
|
if (Gradient_is_inverted)
|
|
position_in_gradient=Gradient_upper_bound-position_in_gradient;
|
|
else
|
|
position_in_gradient=Gradient_lower_bound+position_in_gradient;
|
|
|
|
Gradient_pixel(x_pos,y_pos,position_in_gradient);
|
|
}
|
|
|
|
|
|
// -- Gestion d'un dégradé par trames étendues --
|
|
|
|
void Gradient_extra_dithered(long index,short x_pos,short y_pos)
|
|
{
|
|
long position_in_gradient;
|
|
long position_in_segment;
|
|
|
|
//
|
|
// But de l'opération: en plus de calculer la position de base (désignée
|
|
// dans cette procédure par "position_in_gradient", on calcule la position
|
|
// de l'indice dans le schéma suivant:
|
|
//
|
|
// | Les indices qui traînent de ce côté du segment se voient subir
|
|
// | une incrémentation conditionnelle à leur position dans l'écran.
|
|
// v
|
|
// |---|---|---|---- - - -
|
|
// ^
|
|
// |_ Les indices qui traînent de ce côté du segment se voient subir une
|
|
// décrémentation conditionnelle à leur position dans l'écran.
|
|
|
|
// On fait d'abord un premier calcul partiel
|
|
position_in_gradient=(index*Gradient_bounds_range);
|
|
|
|
// On gère un déplacement au hasard
|
|
position_in_gradient+=(Gradient_total_range*(rand()%Gradient_random_factor)) >>6;
|
|
position_in_gradient-=(Gradient_total_range*Gradient_random_factor) >>7;
|
|
|
|
if (position_in_gradient<0)
|
|
position_in_gradient=0;
|
|
|
|
// Qui nous permet de calculer la position dans le segment
|
|
position_in_segment=((position_in_gradient<<3)/Gradient_total_range)&7;
|
|
|
|
// On peut ensuite terminer le calcul de l'indice dans le dégradé
|
|
position_in_gradient/=Gradient_total_range;
|
|
|
|
// On va pouvoir discuter de la valeur de position_in_gradient en fonction
|
|
// de la position dans l'écran et de la position_in_segment.
|
|
|
|
switch (position_in_segment)
|
|
{
|
|
case 0 : // On est sur l'extrême gauche du segment
|
|
if (((x_pos+y_pos)&1)==0)
|
|
position_in_gradient--;
|
|
break;
|
|
|
|
case 1 : // On est sur la gauche du segment
|
|
case 2 : // On est sur la gauche du segment
|
|
if (((x_pos & 1)==0) && ((y_pos & 1)==0))
|
|
position_in_gradient--;
|
|
break;
|
|
|
|
// On n'a pas à traiter les cas 3 et 4 car ils représentent des valeurs
|
|
// suffisament au centre du segment pour ne pas avoir à subir la trame
|
|
|
|
case 5 : // On est sur la droite du segment
|
|
case 6 : // On est sur la droite du segment
|
|
if (((x_pos & 1)==0) && ((y_pos & 1)!=0))
|
|
position_in_gradient++;
|
|
break;
|
|
|
|
case 7 : // On est sur l'extreme droite du segment
|
|
if (((x_pos+y_pos)&1)!=0) // Note: on doit faire le test inverse au cas gauche pour synchroniser les 2 côtés de la trame.
|
|
position_in_gradient++;
|
|
}
|
|
|
|
// On va vérifier que nos petites idioties n'ont pas éjecté la valeur hors
|
|
// des valeurs autorisées par le dégradé défini par l'utilisateur.
|
|
|
|
if (position_in_gradient<0)
|
|
position_in_gradient=0;
|
|
else if (position_in_gradient>=Gradient_bounds_range)
|
|
position_in_gradient=Gradient_bounds_range-1;
|
|
|
|
// On ramène ensuite la position dans le dégradé vers un numéro de couleur
|
|
if (Gradient_is_inverted)
|
|
position_in_gradient=Gradient_upper_bound-position_in_gradient;
|
|
else
|
|
position_in_gradient=Gradient_lower_bound+position_in_gradient;
|
|
|
|
Gradient_pixel(x_pos,y_pos,position_in_gradient);
|
|
}
|
|
|
|
|
|
|
|
// -- Tracer un cercle degradé (une sphère) --
|
|
|
|
void Draw_grad_circle(short center_x,short center_y,short radius,short spot_x,short spot_y)
|
|
{
|
|
long start_x;
|
|
long start_y;
|
|
long x_pos;
|
|
long y_pos;
|
|
long end_x;
|
|
long end_y;
|
|
long distance_x; // Distance (au carré) sur les X du point en cours au centre d'éclairage
|
|
long distance_y; // Distance (au carré) sur les Y du point en cours au centre d'éclairage
|
|
|
|
start_x=center_x-radius;
|
|
start_y=center_y-radius;
|
|
end_x=center_x+radius;
|
|
end_y=center_y+radius;
|
|
|
|
// Correction des bornes d'après les limites
|
|
if (start_y<Limit_top)
|
|
start_y=Limit_top;
|
|
if (end_y>Limit_bottom)
|
|
end_y=Limit_bottom;
|
|
if (start_x<Limit_left)
|
|
start_x=Limit_left;
|
|
if (end_x>Limit_right)
|
|
end_x=Limit_right;
|
|
|
|
Gradient_total_range=Circle_limit+
|
|
((center_x-spot_x)*(center_x-spot_x))+
|
|
((center_y-spot_y)*(center_y-spot_y))+
|
|
(2L*radius*sqrt(
|
|
((center_x-spot_x)*(center_x-spot_x))+
|
|
((center_y-spot_y)*(center_y-spot_y))));
|
|
|
|
if (Gradient_total_range==0)
|
|
Gradient_total_range=1;
|
|
|
|
// Affichage du cercle
|
|
for (y_pos=start_y,Circle_cursor_Y=(long)start_y-center_y;y_pos<=end_y;y_pos++,Circle_cursor_Y++)
|
|
{
|
|
distance_y =(y_pos-spot_y);
|
|
distance_y*=distance_y;
|
|
for (x_pos=start_x,Circle_cursor_X=(long)start_x-center_x;x_pos<=end_x;x_pos++,Circle_cursor_X++)
|
|
if (Pixel_in_circle())
|
|
{
|
|
distance_x =(x_pos-spot_x);
|
|
distance_x*=distance_x;
|
|
Gradient_function(distance_x+distance_y,x_pos,y_pos);
|
|
}
|
|
}
|
|
|
|
Update_part_of_screen(center_x-radius,center_y-radius,2*radius+1,2*radius+1);
|
|
}
|
|
|
|
|
|
// -- Tracer une ellipse degradée --
|
|
|
|
void Draw_grad_ellipse(short center_x,short center_y,short horizontal_radius,short vertical_radius,short spot_x,short spot_y)
|
|
{
|
|
long start_x;
|
|
long start_y;
|
|
long x_pos;
|
|
long y_pos;
|
|
long end_x;
|
|
long end_y;
|
|
long distance_x; // Distance (au carré) sur les X du point en cours au centre d'éclairage
|
|
long distance_y; // Distance (au carré) sur les Y du point en cours au centre d'éclairage
|
|
|
|
|
|
start_x=center_x-horizontal_radius;
|
|
start_y=center_y-vertical_radius;
|
|
end_x=center_x+horizontal_radius;
|
|
end_y=center_y+vertical_radius;
|
|
|
|
// Calcul des limites de l'ellipse
|
|
Ellipse_compute_limites(horizontal_radius+1,vertical_radius+1);
|
|
|
|
// On calcule la distance maximale:
|
|
Gradient_total_range=(horizontal_radius*horizontal_radius)+
|
|
(vertical_radius*vertical_radius)+
|
|
((center_x-spot_x)*(center_x-spot_x))+
|
|
((center_y-spot_y)*(center_y-spot_y))+
|
|
(2L
|
|
*sqrt(
|
|
(horizontal_radius*horizontal_radius)+
|
|
(vertical_radius *vertical_radius ))
|
|
*sqrt(
|
|
((center_x-spot_x)*(center_x-spot_x))+
|
|
((center_y-spot_y)*(center_y-spot_y))));
|
|
|
|
if (Gradient_total_range==0)
|
|
Gradient_total_range=1;
|
|
|
|
// Correction des bornes d'après les limites
|
|
if (start_y<Limit_top)
|
|
start_y=Limit_top;
|
|
if (end_y>Limit_bottom)
|
|
end_y=Limit_bottom;
|
|
if (start_x<Limit_left)
|
|
start_x=Limit_left;
|
|
if (end_x>Limit_right)
|
|
end_x=Limit_right;
|
|
|
|
// Affichage de l'ellipse
|
|
for (y_pos=start_y,Ellipse_cursor_Y=start_y-center_y;y_pos<=end_y;y_pos++,Ellipse_cursor_Y++)
|
|
{
|
|
distance_y =(y_pos-spot_y);
|
|
distance_y*=distance_y;
|
|
for (x_pos=start_x,Ellipse_cursor_X=start_x-center_x;x_pos<=end_x;x_pos++,Ellipse_cursor_X++)
|
|
if (Pixel_in_ellipse())
|
|
{
|
|
distance_x =(x_pos-spot_x);
|
|
distance_x*=distance_x;
|
|
Gradient_function(distance_x+distance_y,x_pos,y_pos);
|
|
}
|
|
}
|
|
|
|
Update_part_of_screen(start_x,start_y,end_x-start_x+1,end_y-start_y+1);
|
|
}
|
|
|
|
|
|
// Tracé d'un rectangle (rax ray - rbx rby) dégradé selon le vecteur (vax vay - vbx - vby)
|
|
void Draw_grad_rectangle(short rax,short ray,short rbx,short rby,short vax,short vay, short vbx, short vby)
|
|
{
|
|
short y_pos, x_pos;
|
|
|
|
// On commence par s'assurer que le rectangle est à l'endroit
|
|
if(rbx < rax)
|
|
{
|
|
x_pos = rbx;
|
|
rbx = rax;
|
|
rax = x_pos;
|
|
}
|
|
|
|
if(rby < ray)
|
|
{
|
|
y_pos = rby;
|
|
rby = ray;
|
|
ray = y_pos;
|
|
}
|
|
|
|
// Correction des bornes d'après les limites
|
|
if (ray<Limit_top)
|
|
ray=Limit_top;
|
|
if (rby>Limit_bottom)
|
|
rby=Limit_bottom;
|
|
if (rax<Limit_left)
|
|
rax=Limit_left;
|
|
if (rbx>Limit_right)
|
|
rbx=Limit_right;
|
|
|
|
if(vbx == vax)
|
|
{
|
|
// Le vecteur est vertical, donc on évite la partie en dessous qui foirerait avec une division par 0...
|
|
if (vby == vay) return; // L'utilisateur fait n'importe quoi
|
|
Gradient_total_range = abs(vby - vay);
|
|
for(y_pos=ray;y_pos<=rby;y_pos++)
|
|
for(x_pos=rax;x_pos<=rbx;x_pos++)
|
|
Gradient_function(abs(vby - y_pos),x_pos,y_pos);
|
|
|
|
}
|
|
else
|
|
{
|
|
float a;
|
|
float b;
|
|
float distance_x, distance_y;
|
|
|
|
Gradient_total_range = sqrt(pow(vby - vay,2)+pow(vbx - vax,2));
|
|
a = (float)(vby - vay)/(float)(vbx - vax);
|
|
b = vay - a*vax;
|
|
|
|
for (y_pos=ray;y_pos<=rby;y_pos++)
|
|
for (x_pos = rax;x_pos<=rbx;x_pos++)
|
|
{
|
|
// On calcule ou on en est dans le dégradé
|
|
distance_x = pow((y_pos - vay),2)+pow((x_pos - vax),2);
|
|
distance_y = pow((-a * x_pos + y_pos - b),2)/(a*a+1);
|
|
|
|
Gradient_function((int)sqrt(distance_x - distance_y),x_pos,y_pos);
|
|
}
|
|
}
|
|
Update_part_of_screen(rax,ray,rbx,rby);
|
|
}
|
|
|
|
|
|
|
|
|
|
// -- Tracer un polygône plein --
|
|
|
|
typedef struct T_Polygon_edge /* an active edge */
|
|
{
|
|
short top; /* top y position */
|
|
short bottom; /* bottom y position */
|
|
float x, dx; /* floating point x position and gradient */
|
|
float w; /* width of line segment */
|
|
struct T_Polygon_edge *prev; /* doubly linked list */
|
|
struct T_Polygon_edge *next;
|
|
} T_Polygon_edge;
|
|
|
|
|
|
|
|
/* Fill_edge_structure:
|
|
* Polygon helper function: initialises an edge structure for the 2d
|
|
* rasteriser.
|
|
*/
|
|
void Fill_edge_structure(T_Polygon_edge *edge, short *i1, short *i2)
|
|
{
|
|
short *it;
|
|
|
|
if (i2[1] < i1[1])
|
|
{
|
|
it = i1;
|
|
i1 = i2;
|
|
i2 = it;
|
|
}
|
|
|
|
edge->top = i1[1];
|
|
edge->bottom = i2[1] - 1;
|
|
edge->dx = ((float) i2[0] - (float) i1[0]) / ((float) i2[1] - (float) i1[1]);
|
|
edge->x = i1[0] + 0.4999999;
|
|
edge->prev = NULL;
|
|
edge->next = NULL;
|
|
|
|
if (edge->dx+1 < 0.0)
|
|
edge->x += edge->dx+1;
|
|
|
|
if (edge->dx >= 0.0)
|
|
edge->w = edge->dx;
|
|
else
|
|
edge->w = -(edge->dx);
|
|
|
|
if (edge->w-1.0<0.0)
|
|
edge->w = 0.0;
|
|
else
|
|
edge->w = edge->w-1;
|
|
}
|
|
|
|
|
|
|
|
/* Add_edge:
|
|
* Adds an edge structure to a linked list, returning the new head pointer.
|
|
*/
|
|
T_Polygon_edge * Add_edge(T_Polygon_edge *list, T_Polygon_edge *edge, int sort_by_x)
|
|
{
|
|
T_Polygon_edge *pos = list;
|
|
T_Polygon_edge *prev = NULL;
|
|
|
|
if (sort_by_x)
|
|
{
|
|
while ( (pos) && ((pos->x+((pos->w+pos->dx)/2)) < (edge->x+((edge->w+edge->dx)/2))) )
|
|
{
|
|
prev = pos;
|
|
pos = pos->next;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
while ((pos) && (pos->top < edge->top))
|
|
{
|
|
prev = pos;
|
|
pos = pos->next;
|
|
}
|
|
}
|
|
|
|
edge->next = pos;
|
|
edge->prev = prev;
|
|
|
|
if (pos)
|
|
pos->prev = edge;
|
|
|
|
if (prev)
|
|
{
|
|
prev->next = edge;
|
|
return list;
|
|
}
|
|
else
|
|
return edge;
|
|
}
|
|
|
|
|
|
|
|
/* Remove_edge:
|
|
* Removes an edge structure from a list, returning the new head pointer.
|
|
*/
|
|
T_Polygon_edge * Remove_edge(T_Polygon_edge *list, T_Polygon_edge *edge)
|
|
{
|
|
if (edge->next)
|
|
edge->next->prev = edge->prev;
|
|
|
|
if (edge->prev)
|
|
{
|
|
edge->prev->next = edge->next;
|
|
return list;
|
|
}
|
|
else
|
|
return edge->next;
|
|
}
|
|
|
|
|
|
|
|
/* polygon:
|
|
* Draws a filled polygon with an arbitrary number of corners. Pass the
|
|
* number of vertices, then an array containing a series of x, y points
|
|
* (a total of vertices*2 values).
|
|
*/
|
|
void Polyfill_general(int vertices, short * points, int color)
|
|
{
|
|
short c;
|
|
short top = 0x7FFF;
|
|
short bottom = 0;
|
|
short *i1, *i2;
|
|
short x_pos,end_x;
|
|
T_Polygon_edge *edge, *next_edge, *initial_edge;
|
|
T_Polygon_edge *active_edges = NULL;
|
|
T_Polygon_edge *inactive_edges = NULL;
|
|
|
|
/* allocate some space and fill the edge table */
|
|
initial_edge=edge=(T_Polygon_edge *) malloc(sizeof(T_Polygon_edge) * vertices);
|
|
|
|
i1 = points;
|
|
i2 = points + ((vertices-1)<<1);
|
|
|
|
for (c=0; c<vertices; c++)
|
|
{
|
|
if (i1[1] != i2[1])
|
|
{
|
|
Fill_edge_structure(edge, i1, i2);
|
|
|
|
if (edge->bottom >= edge->top)
|
|
{
|
|
if (edge->top < top)
|
|
top = edge->top;
|
|
|
|
if (edge->bottom > bottom)
|
|
bottom = edge->bottom;
|
|
|
|
inactive_edges = Add_edge(inactive_edges, edge, 0);
|
|
edge++;
|
|
}
|
|
}
|
|
i2 = i1;
|
|
i1 += 2;
|
|
}
|
|
|
|
/* for each scanline in the polygon... */
|
|
for (c=top; c<=bottom; c++)
|
|
{
|
|
/* check for newly active edges */
|
|
edge = inactive_edges;
|
|
while ((edge) && (edge->top == c))
|
|
{
|
|
next_edge = edge->next;
|
|
inactive_edges = Remove_edge(inactive_edges, edge);
|
|
active_edges = Add_edge(active_edges, edge, 1);
|
|
edge = next_edge;
|
|
}
|
|
|
|
/* draw horizontal line segments */
|
|
if ((c>=Limit_top) && (c<=Limit_bottom))
|
|
{
|
|
edge = active_edges;
|
|
while ((edge) && (edge->next))
|
|
{
|
|
x_pos=/*Round*/(edge->x);
|
|
end_x=/*Round*/(edge->next->x+edge->next->w);
|
|
if (x_pos<Limit_left)
|
|
x_pos=Limit_left;
|
|
if (end_x>Limit_right)
|
|
end_x=Limit_right;
|
|
for (; x_pos<=end_x; x_pos++)
|
|
Pixel_figure(x_pos,c,color);
|
|
edge = edge->next->next;
|
|
}
|
|
}
|
|
|
|
/* update edges, sorting and removing dead ones */
|
|
edge = active_edges;
|
|
while (edge)
|
|
{
|
|
next_edge = edge->next;
|
|
if (c >= edge->bottom)
|
|
active_edges = Remove_edge(active_edges, edge);
|
|
else
|
|
{
|
|
edge->x += edge->dx;
|
|
while ((edge->prev) && ( (edge->x+(edge->w/2)) < (edge->prev->x+(edge->prev->w/2))) )
|
|
{
|
|
if (edge->next)
|
|
edge->next->prev = edge->prev;
|
|
edge->prev->next = edge->next;
|
|
edge->next = edge->prev;
|
|
edge->prev = edge->prev->prev;
|
|
edge->next->prev = edge;
|
|
if (edge->prev)
|
|
edge->prev->next = edge;
|
|
else
|
|
active_edges = edge;
|
|
}
|
|
}
|
|
edge = next_edge;
|
|
}
|
|
}
|
|
|
|
free(initial_edge);
|
|
|
|
// On ne connait pas simplement les xmin et xmax ici, mais de toutes façon ce n'est pas utilisé en preview
|
|
Update_part_of_screen(0,top,Main_image_width,bottom-top+1);
|
|
}
|
|
|
|
|
|
void Polyfill(int vertices, short * points, int color)
|
|
{
|
|
int index;
|
|
byte *old_fx_feedback_screen;
|
|
|
|
Pixel_clipped(points[0],points[1],color);
|
|
if (vertices==1)
|
|
{
|
|
Update_part_of_screen(points[0],points[1],1,1);
|
|
return;
|
|
}
|
|
|
|
// Comme pour le Fill, cette operation fait un peu d'"overdraw"
|
|
// (pixels dessinés plus d'une fois) alors on force le FX Feedback à OFF
|
|
old_fx_feedback_screen=FX_feedback_screen;
|
|
FX_feedback_screen=Screen_backup;
|
|
|
|
Pixel_figure=Pixel_clipped;
|
|
Polyfill_general(vertices,points,color);
|
|
|
|
// Remarque: pour dessiner la bordure avec la brosse en cours au lieu
|
|
// d'un pixel de couleur premier-plan, il suffit de mettre ici:
|
|
// Pixel_figure=Pixel_figure_permanent;
|
|
|
|
// Dessin du contour
|
|
for (index=0; index<vertices-1;index+=1)
|
|
Draw_line_general(points[index*2],points[index*2+1],points[index*2+2],points[index*2+3],color);
|
|
Draw_line_general(points[0],points[1],points[index*2],points[index*2+1],color);
|
|
|
|
// restore de l'etat du FX Feedback
|
|
FX_feedback_screen=old_fx_feedback_screen;
|
|
|
|
}
|
|
|
|
|
|
|
|
//------------ Remplacement de la couleur pointée par une autre --------------
|
|
|
|
void Replace(byte New_color)
|
|
{
|
|
byte old_color;
|
|
|
|
if ((Paintbrush_X<Main_image_width)
|
|
&& (Paintbrush_Y<Main_image_height))
|
|
{
|
|
old_color=Read_pixel_from_current_screen(Paintbrush_X,Paintbrush_Y);
|
|
if ( (old_color!=New_color)
|
|
&& ((!Stencil_mode) || (!Stencil[old_color])) )
|
|
{
|
|
Replace_a_color(old_color,New_color);
|
|
Display_all_screen();
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/******************************************************************************/
|
|
/********************************** SHADES ************************************/
|
|
|
|
// Transformer une liste de shade en deux tables de conversion
|
|
void Shade_list_to_lookup_tables(word * list,short step,byte mode,byte * table_inc,byte * table_dec)
|
|
{
|
|
int index;
|
|
int first;
|
|
int last;
|
|
int color;
|
|
int temp;
|
|
|
|
|
|
// On initialise les deux tables de conversion en Identité
|
|
for (index=0;index<256;index++)
|
|
{
|
|
table_inc[index]=index;
|
|
table_dec[index]=index;
|
|
}
|
|
|
|
// On s'apprête à examiner l'ensemble de la liste
|
|
for (index=0;index<512;index++)
|
|
{
|
|
// On recherche la première case de la liste non vide (et non inhibée)
|
|
while ((index<512) && (list[index]>255))
|
|
index++;
|
|
|
|
// On note la position de la première case de la séquence
|
|
first=index;
|
|
|
|
// On recherche la position de la dernière case de la séquence
|
|
for (last=first;list[last+1]<256;last++);
|
|
|
|
// Pour toutes les cases non vides (et non inhibées) qui suivent
|
|
switch (mode)
|
|
{
|
|
case SHADE_MODE_NORMAL :
|
|
for (;(index<512) && (list[index]<256);index++)
|
|
{ // On met à jour les tables de conversion
|
|
color=list[index];
|
|
table_inc[color]=list[(index+step<=last)?index+step:last];
|
|
table_dec[color]=list[(index-step>=first)?index-step:first];
|
|
}
|
|
break;
|
|
case SHADE_MODE_LOOP :
|
|
temp=1+last-first;
|
|
for (;(index<512) && (list[index]<256);index++)
|
|
{ // On met à jour les tables de conversion
|
|
color=list[index];
|
|
table_inc[color]=list[first+((step+index-first)%temp)];
|
|
table_dec[color]=list[first+(((temp-step)+index-first)%temp)];
|
|
}
|
|
break;
|
|
default : // SHADE_MODE_NOSAT
|
|
for (;(index<512) && (list[index]<256);index++)
|
|
{ // On met à jour les tables de conversion
|
|
color=list[index];
|
|
if (index+step<=last)
|
|
table_inc[color]=list[index+step];
|
|
if (index-step>=first)
|
|
table_dec[color]=list[index-step];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
// -- Interface avec l'image, affectée par le facteur de grossissement -------
|
|
|
|
// fonction d'affichage "Pixel" utilisée pour les opérations définitivement
|
|
// Ne doit à aucune condition être appelée en dehors de la partie visible
|
|
// de l'image dans l'écran (ça pourrait être grave)
|
|
void Display_pixel(word x,word y,byte color)
|
|
// x & y sont la position d'un point dans l'IMAGE
|
|
// color est la couleur du point
|
|
// Le Stencil est géré.
|
|
// Les effets sont gérés par appel à Effect_function().
|
|
// La Loupe est gérée par appel à Pixel_preview().
|
|
{
|
|
if ( ( (!Sieve_mode) || (Effect_sieve(x,y)) )
|
|
&& (!((Stencil_mode) && (Stencil[Read_pixel_from_current_screen(x,y)])))
|
|
&& (!((Mask_mode) && (Mask_table[Read_pixel_from_spare_screen(x,y)]))) )
|
|
{
|
|
color=Effect_function(x,y,color);
|
|
Pixel_in_current_screen(x,y,color);
|
|
Pixel_preview(x,y,color);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
// -- Calcul des différents effets -------------------------------------------
|
|
|
|
// -- Aucun effet en cours --
|
|
|
|
byte No_effect(__attribute__((unused)) word x,__attribute__((unused)) word y,byte color)
|
|
{
|
|
return color;
|
|
}
|
|
|
|
// -- Effet de Shading --
|
|
|
|
byte Effect_shade(word x,word y,__attribute__((unused)) byte color)
|
|
{
|
|
return Shade_table[Read_pixel_from_feedback_screen(x,y)];
|
|
}
|
|
|
|
byte Effect_quick_shade(word x,word y,byte color)
|
|
{
|
|
int c=color=Read_pixel_from_feedback_screen(x,y);
|
|
int direction=(Fore_color<=Back_color);
|
|
byte start,end;
|
|
int width;
|
|
|
|
if (direction)
|
|
{
|
|
start=Fore_color;
|
|
end =Back_color;
|
|
}
|
|
else
|
|
{
|
|
start=Back_color;
|
|
end =Fore_color;
|
|
}
|
|
|
|
if ((c>=start) && (c<=end) && (start!=end))
|
|
{
|
|
width=1+end-start;
|
|
|
|
if ( ((Shade_table==Shade_table_left) && direction) || ((Shade_table==Shade_table_right) && (!direction)) )
|
|
c-=Quick_shade_step%width;
|
|
else
|
|
c+=Quick_shade_step%width;
|
|
|
|
if (c<start)
|
|
switch (Quick_shade_loop)
|
|
{
|
|
case SHADE_MODE_NORMAL : return start;
|
|
case SHADE_MODE_LOOP : return (width+c);
|
|
default : return color;
|
|
}
|
|
|
|
if (c>end)
|
|
switch (Quick_shade_loop)
|
|
{
|
|
case SHADE_MODE_NORMAL : return end;
|
|
case SHADE_MODE_LOOP : return (c-width);
|
|
default : return color;
|
|
}
|
|
}
|
|
|
|
return c;
|
|
}
|
|
|
|
// -- Effet de Tiling --
|
|
|
|
byte Effect_tiling(word x,word y,__attribute__((unused)) byte color)
|
|
{
|
|
return Read_pixel_from_brush((x+Brush_width-Tiling_offset_X)%Brush_width,
|
|
(y+Brush_height-Tiling_offset_Y)%Brush_height);
|
|
}
|
|
|
|
// -- Effet de Smooth --
|
|
|
|
byte Effect_smooth(word x,word y,__attribute__((unused)) byte color)
|
|
{
|
|
int r,g,b;
|
|
byte c;
|
|
int weight,total_weight;
|
|
byte x2=((x+1)<Main_image_width);
|
|
byte y2=((y+1)<Main_image_height);
|
|
|
|
// On commence par le pixel central
|
|
c=Read_pixel_from_feedback_screen(x,y);
|
|
total_weight=Smooth_matrix[1][1];
|
|
r=total_weight*Main_palette[c].R;
|
|
g=total_weight*Main_palette[c].G;
|
|
b=total_weight*Main_palette[c].B;
|
|
|
|
if (x)
|
|
{
|
|
c=Read_pixel_from_feedback_screen(x-1,y);
|
|
total_weight+=(weight=Smooth_matrix[0][1]);
|
|
r+=weight*Main_palette[c].R;
|
|
g+=weight*Main_palette[c].G;
|
|
b+=weight*Main_palette[c].B;
|
|
|
|
if (y)
|
|
{
|
|
c=Read_pixel_from_feedback_screen(x-1,y-1);
|
|
total_weight+=(weight=Smooth_matrix[0][0]);
|
|
r+=weight*Main_palette[c].R;
|
|
g+=weight*Main_palette[c].G;
|
|
b+=weight*Main_palette[c].B;
|
|
|
|
if (y2)
|
|
{
|
|
c=Read_pixel_from_feedback_screen(x-1,y+1);
|
|
total_weight+=(weight=Smooth_matrix[0][2]);
|
|
r+=weight*Main_palette[c].R;
|
|
g+=weight*Main_palette[c].G;
|
|
b+=weight*Main_palette[c].B;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (x2)
|
|
{
|
|
c=Read_pixel_from_feedback_screen(x+1,y);
|
|
total_weight+=(weight=Smooth_matrix[2][1]);
|
|
r+=weight*Main_palette[c].R;
|
|
g+=weight*Main_palette[c].G;
|
|
b+=weight*Main_palette[c].B;
|
|
|
|
if (y)
|
|
{
|
|
c=Read_pixel_from_feedback_screen(x+1,y-1);
|
|
total_weight+=(weight=Smooth_matrix[2][0]);
|
|
r+=weight*Main_palette[c].R;
|
|
g+=weight*Main_palette[c].G;
|
|
b+=weight*Main_palette[c].B;
|
|
|
|
if (y2)
|
|
{
|
|
c=Read_pixel_from_feedback_screen(x+1,y+1);
|
|
total_weight+=(weight=Smooth_matrix[2][2]);
|
|
r+=weight*Main_palette[c].R;
|
|
g+=weight*Main_palette[c].G;
|
|
b+=weight*Main_palette[c].B;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (y)
|
|
{
|
|
c=Read_pixel_from_feedback_screen(x,y-1);
|
|
total_weight+=(weight=Smooth_matrix[1][0]);
|
|
r+=weight*Main_palette[c].R;
|
|
g+=weight*Main_palette[c].G;
|
|
b+=weight*Main_palette[c].B;
|
|
}
|
|
|
|
if (y2)
|
|
{
|
|
c=Read_pixel_from_feedback_screen(x,y+1);
|
|
total_weight+=(weight=Smooth_matrix[1][2]);
|
|
r+=weight*Main_palette[c].R;
|
|
g+=weight*Main_palette[c].G;
|
|
b+=weight*Main_palette[c].B;
|
|
}
|
|
|
|
return (total_weight)? // On regarde s'il faut éviter le 0/0.
|
|
Best_color(Round_div(r,total_weight),
|
|
Round_div(g,total_weight),
|
|
Round_div(b,total_weight)):
|
|
Read_pixel_from_current_screen(x,y); // C'est bien l'écran courant et pas
|
|
// l'écran feedback car il s'agit de ne
|
|
} // pas modifier l'écran courant.
|