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grafX2/src/special.c

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/* vim:expandtab:ts=2 sw=2:
*/
/* Grafx2 - The Ultimate 256-color bitmap paint program
Copyright 2007 Adrien Destugues
Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
Grafx2 is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; version 2
of the License.
Grafx2 is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Grafx2; if not, see <http://www.gnu.org/licenses/>
*/
#include <stdlib.h>
#include <string.h>
#include "const.h"
#include "struct.h"
#include "global.h"
#include "graph.h"
#include "engine.h"
#include "windows.h"
#include "special.h"
#include "pages.h"
#include "misc.h"
#include "buttons.h"
//---------------------- Modifier le pinceau spécial -------------------------
int Circle_squared_diameter(int diameter)
{
int result = diameter*diameter;
// Trick to make some circles rounder, even though
// mathematically incorrect.
if (diameter==3 || diameter==9)
return result-2;
if (diameter==11)
return result-6;
if (diameter==14)
return result-4;
return result;
}
void Set_paintbrush_size(int width, int height)
{
int x_pos,y_pos;
int x,y;
int radius2;
if (width<1) width=1;
if (height<1) height=1;
if (width>MAX_PAINTBRUSH_SIZE) width=MAX_PAINTBRUSH_SIZE;
if (height>MAX_PAINTBRUSH_SIZE) height=MAX_PAINTBRUSH_SIZE;
Paintbrush_width=width;
Paintbrush_height=height;
Paintbrush_offset_X=Paintbrush_width>>1;
Paintbrush_offset_Y=Paintbrush_height>>1;
switch (Paintbrush_shape)
{
case PAINTBRUSH_SHAPE_ROUND :
radius2=Circle_squared_diameter(Paintbrush_width);
for (y_pos=0, y=1-Paintbrush_height; y_pos<Paintbrush_height; y_pos++,y+=2)
for (x_pos=0, x=1-Paintbrush_width; x_pos<Paintbrush_width; x_pos++,x+=2)
{
Paintbrush_sprite[(y_pos*MAX_PAINTBRUSH_SIZE)+x_pos]=( ((x*x)+(y*y)) <= radius2 );
}
break;
case PAINTBRUSH_SHAPE_SQUARE :
for (x_pos=0,y_pos=0; x_pos<Paintbrush_height; x_pos++,y_pos+=MAX_PAINTBRUSH_SIZE)
memset(Paintbrush_sprite+y_pos,1,Paintbrush_width);
break;
case PAINTBRUSH_SHAPE_SIEVE_ROUND :
{
int reminder=0;
if (Paintbrush_width==1)
reminder = 1;
radius2=Circle_squared_diameter(Paintbrush_width);
for (y_pos=0, y=1-Paintbrush_height; y_pos<Paintbrush_height; y_pos++,y+=2)
for (x_pos=0, x=1-Paintbrush_width; x_pos<Paintbrush_width; x_pos++,x+=2)
{
Paintbrush_sprite[(y_pos*MAX_PAINTBRUSH_SIZE)+x_pos]=( ((x_pos+y_pos+reminder)&1) && (((x*x)+(y*y)) < radius2));
}
break;
}
case PAINTBRUSH_SHAPE_SIEVE_SQUARE:
for (y_pos=0; y_pos<Paintbrush_height; y_pos++)
for (x_pos=0; x_pos<Paintbrush_width; x_pos++)
Paintbrush_sprite[(y_pos*MAX_PAINTBRUSH_SIZE)+x_pos]=!((x_pos+y_pos)&1);
break;
case PAINTBRUSH_SHAPE_PLUS:
x=Paintbrush_width>>1;
for (y_pos=0; y_pos<Paintbrush_height; y_pos++)
for (x_pos=0; x_pos<Paintbrush_width; x_pos++)
Paintbrush_sprite[(y_pos*MAX_PAINTBRUSH_SIZE)+x_pos]=((x_pos==x) || (y_pos==x));
break;
case PAINTBRUSH_SHAPE_SLASH:
x=Paintbrush_width>>1;
for (y_pos=0; y_pos<Paintbrush_height; y_pos++)
for (x_pos=0; x_pos<Paintbrush_width; x_pos++)
Paintbrush_sprite[(y_pos*MAX_PAINTBRUSH_SIZE)+x_pos]=(x_pos==(Paintbrush_width-(y_pos+1)));
break;
case PAINTBRUSH_SHAPE_ANTISLASH:
x=Paintbrush_width>>1;
for (y_pos=0; y_pos<Paintbrush_height; y_pos++)
for (x_pos=0; x_pos<Paintbrush_width; x_pos++)
Paintbrush_sprite[(y_pos*MAX_PAINTBRUSH_SIZE)+x_pos]=(x_pos==y_pos);
break;
case PAINTBRUSH_SHAPE_HORIZONTAL_BAR:
memset(Paintbrush_sprite,1,Paintbrush_width);
break;
case PAINTBRUSH_SHAPE_VERTICAL_BAR:
for (y_pos=0; y_pos<Paintbrush_height; y_pos++)
Paintbrush_sprite[(y_pos*MAX_PAINTBRUSH_SIZE)]=1;
break;
case PAINTBRUSH_SHAPE_CROSS:
x=Paintbrush_width>>1;
for (y_pos=0; y_pos<Paintbrush_height; y_pos++)
for (x_pos=0; x_pos<Paintbrush_width; x_pos++)
Paintbrush_sprite[(y_pos*MAX_PAINTBRUSH_SIZE)+x_pos]=( (x_pos==y_pos) || (x_pos==(Paintbrush_height-(y_pos+1))) );
break;
case PAINTBRUSH_SHAPE_DIAMOND:
x=Paintbrush_width>>1;
for (y_pos=0; y_pos<Paintbrush_height; y_pos++)
for (x_pos=0; x_pos<Paintbrush_width; x_pos++)
{
if (x_pos<=x)
y=x-x_pos;
else
y=x_pos-x;
if (y_pos<=x)
y+=x-y_pos;
else
y+=y_pos-x;
Paintbrush_sprite[(y_pos*MAX_PAINTBRUSH_SIZE)+x_pos]=(y<=x);
}
break;
case PAINTBRUSH_SHAPE_RANDOM:
// Init with blank
for (y_pos=0; y_pos<Paintbrush_height; y_pos++)
memset(Paintbrush_sprite+y_pos*MAX_PAINTBRUSH_SIZE,0,Paintbrush_width);
radius2=Circle_squared_diameter(Paintbrush_width);
for (y_pos=0, y=1-Paintbrush_height; y_pos<Paintbrush_height; y_pos++,y+=2)
for (x_pos=0, x=1-Paintbrush_width; x_pos<Paintbrush_width; x_pos++,x+=2)
{
if ((x*x)+(y*y) < radius2 && !(rand()&7))
{
Paintbrush_sprite[(y_pos*MAX_PAINTBRUSH_SIZE)+x_pos]=1;
// This prevents having a pixels that touch each other.
if (x_pos>0)
Paintbrush_sprite[(y_pos*MAX_PAINTBRUSH_SIZE)+x_pos-1]=0;
if (y_pos>0)
Paintbrush_sprite[((y_pos-1)*MAX_PAINTBRUSH_SIZE)+x_pos]=0;
}
}
}
}
void Smaller_paintbrush(void)
{
if ( (Paintbrush_shape<PAINTBRUSH_SHAPE_MISC)
&& ( (Paintbrush_width>1)
|| (Paintbrush_height>1) ) )
{
Hide_cursor();
switch (Paintbrush_shape)
{
case PAINTBRUSH_SHAPE_CROSS:
case PAINTBRUSH_SHAPE_PLUS:
case PAINTBRUSH_SHAPE_DIAMOND:
if (Paintbrush_width&1)
Set_paintbrush_size(Paintbrush_width-2,Paintbrush_height-2);
else
Set_paintbrush_size(Paintbrush_width-1,Paintbrush_height-1);
break;
case PAINTBRUSH_SHAPE_SQUARE:
case PAINTBRUSH_SHAPE_SLASH:
case PAINTBRUSH_SHAPE_ANTISLASH:
case PAINTBRUSH_SHAPE_SIEVE_SQUARE:
case PAINTBRUSH_SHAPE_ROUND:
case PAINTBRUSH_SHAPE_SIEVE_ROUND:
case PAINTBRUSH_SHAPE_RANDOM:
Set_paintbrush_size(Paintbrush_width-1,Paintbrush_height-1);
break;
case PAINTBRUSH_SHAPE_HORIZONTAL_BAR:
Set_paintbrush_size(Paintbrush_width-1,1);
break;
case PAINTBRUSH_SHAPE_VERTICAL_BAR:
Set_paintbrush_size(1,Paintbrush_height-1);
}
Display_paintbrush_in_menu();
Display_cursor();
}
}
void Bigger_paintbrush(void)
{
if ( (Paintbrush_shape<PAINTBRUSH_SHAPE_MISC)
&& ( (Paintbrush_width<MAX_PAINTBRUSH_SIZE)
|| (Paintbrush_height<MAX_PAINTBRUSH_SIZE) ) )
{
Hide_cursor();
switch (Paintbrush_shape)
{
case PAINTBRUSH_SHAPE_CROSS:
case PAINTBRUSH_SHAPE_PLUS:
case PAINTBRUSH_SHAPE_DIAMOND:
if (Paintbrush_width&1)
Set_paintbrush_size(Paintbrush_width+2,Paintbrush_height+2);
else
Set_paintbrush_size(Paintbrush_width+1,Paintbrush_height+1);
break;
case PAINTBRUSH_SHAPE_SQUARE:
case PAINTBRUSH_SHAPE_SLASH:
case PAINTBRUSH_SHAPE_ANTISLASH:
case PAINTBRUSH_SHAPE_SIEVE_SQUARE:
case PAINTBRUSH_SHAPE_ROUND:
case PAINTBRUSH_SHAPE_SIEVE_ROUND:
case PAINTBRUSH_SHAPE_RANDOM:
Set_paintbrush_size(Paintbrush_width+1,Paintbrush_height+1);
break;
case PAINTBRUSH_SHAPE_HORIZONTAL_BAR:
Set_paintbrush_size(Paintbrush_width+1,1);
break;
case PAINTBRUSH_SHAPE_VERTICAL_BAR:
Set_paintbrush_size(1,Paintbrush_height+1);
}
Display_paintbrush_in_menu();
Display_cursor();
}
}
//--------------------- Increase the ForeColor -----------------------
void Special_next_forecolor(void)
{
Hide_cursor();
Set_fore_color(Fore_color+1);
Display_cursor();
}
//--------------------- Decrease the ForeColor -----------------------
void Special_previous_forecolor(void)
{
Hide_cursor();
Set_fore_color(Fore_color-1);
Display_cursor();
}
//--------------------- Increase the BackColor -----------------------
void Special_next_backcolor(void)
{
Hide_cursor();
Set_back_color(Back_color+1);
Display_cursor();
}
//--------------------- Decrease the BackColor -----------------------
void Special_previous_backcolor(void)
{
Hide_cursor();
Set_back_color(Back_color-1);
Display_cursor();
}
/// Picks the next foreground color, according to current shade table
void Special_next_user_forecolor(void)
{
Hide_cursor();
Set_fore_color(Shade_table_left[Fore_color]);
Display_cursor();
}
/// Picks the previous foreground color, according to current shade table
void Special_previous_user_forecolor(void)
{
Hide_cursor();
Set_fore_color(Shade_table_right[Fore_color]);
Display_cursor();
}
/// Picks the next background color, according to current shade table
void Special_next_user_backcolor(void)
{
Hide_cursor();
Set_back_color(Shade_table_left[Back_color]);
Display_cursor();
}
/// Picks the previous background color, according to current shade table
void Special_previous_user_backcolor(void)
{
Hide_cursor();
Set_back_color(Shade_table_right[Back_color]);
Display_cursor();
}
// ------------------- Scroller l'écran (pas en mode loupe) ------------------
void Scroll_screen(short delta_x,short delta_y)
{
short temp_x_offset;
short temp_y_offset;
temp_x_offset=Main_offset_X+delta_x;
temp_y_offset=Main_offset_Y+delta_y;
if (temp_x_offset+Screen_width>Main_image_width)
temp_x_offset=Main_image_width-Screen_width;
if (temp_y_offset+Menu_Y>Main_image_height)
temp_y_offset=Main_image_height-Menu_Y;
if (temp_x_offset<0)
temp_x_offset=0;
if (temp_y_offset<0)
temp_y_offset=0;
if ( (Main_offset_X!=temp_x_offset) ||
(Main_offset_Y!=temp_y_offset) )
{
Hide_cursor();
Main_offset_X=temp_x_offset;
Main_offset_Y=temp_y_offset;
Compute_limits();
Compute_paintbrush_coordinates();
Display_all_screen(); // <=> Display_screen + Display_image_limits
Display_cursor();
}
}
// ---------------------- Scroller la fenêtre de la loupe --------------------
void Scroll_magnifier(short delta_x,short delta_y)
{
short temp_x_offset;
short temp_y_offset;
temp_x_offset=Main_magnifier_offset_X+delta_x;
temp_y_offset=Main_magnifier_offset_Y+delta_y;
Clip_magnifier_offsets(&temp_x_offset, &temp_y_offset);
if ( (Main_magnifier_offset_X!=temp_x_offset) ||
(Main_magnifier_offset_Y!=temp_y_offset) )
{
Hide_cursor();
Main_magnifier_offset_X=temp_x_offset;
Main_magnifier_offset_Y=temp_y_offset;
Position_screen_according_to_zoom();
Compute_limits();
Compute_paintbrush_coordinates();
Display_all_screen();
Display_cursor();
}
}
// -------------- Changer le Zoom (grâce aux touches [+] et [-]) -------------
void Zoom(short delta)
{
short index;
for (index=0; ZOOM_FACTOR[index]!=Main_magnifier_factor; index++);
index+=delta;
if ( (index>=0) && (index<NB_ZOOM_FACTORS) )
{
Hide_cursor();
Change_magnifier_factor(index,1);
if (Main_magnifier_mode)
Display_all_screen();
Display_cursor();
}
}
/**
Set zoom value. Negative value means no zoom.
*/
void Zoom_set(int index)
{
Hide_cursor();
if (index<0)
{
/* Zoom 1:1 */
if (Main_magnifier_mode)
Unselect_button(BUTTON_MAGNIFIER);
}
else
{
Change_magnifier_factor(index,1);
if (!Main_magnifier_mode)
Select_button(BUTTON_MAGNIFIER,1);
Display_all_screen();
}
Display_cursor();
}
void Transparency_set(byte amount)
{
const int doubleclick_delay = Config.Double_key_speed;
static long time_click = 0;
long time_previous;
if (!Colorize_mode)
{
// Activate mode
switch(Colorize_current_mode)
{
case 0 :
Effect_function=Effect_interpolated_colorize;
break;
case 1 :
Effect_function=Effect_additive_colorize;
break;
case 2 :
Effect_function=Effect_substractive_colorize;
break;
case 3 :
Effect_function=Effect_alpha_colorize;
}
Shade_mode=0;
Quick_shade_mode=0;
Smooth_mode=0;
Tiling_mode=0;
Colorize_mode=1;
}
time_previous = time_click;
time_click = SDL_GetTicks();
// Check if it's a quick re-press
if (time_click - time_previous < doubleclick_delay)
{
// Use the typed amount as units, keep the tens.
Colorize_opacity = ((Colorize_opacity%100) /10 *10) + amount;
if (Colorize_opacity == 0)
Colorize_opacity = 100;
}
else
{
// Use 10% units: "1"=10%, ... "0"=100%
if (amount == 0)
Colorize_opacity = 100;
else
Colorize_opacity = amount*10;
}
Compute_colorize_table();
}
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