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grafX2/factory.c

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/* vim:expandtab:ts=2 sw=2:
*/
/* Grafx2 - The Ultimate 256-color bitmap paint program
Copyright 2009 Adrien Destugues
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/>
*/
/*! \file factory.c
* \brief Brush factory - generates brush from lua scripts
*
* The brush factory allows you to generate brushes with Lua code.
*/
#include <math.h>
#include "brush.h"
#include "buttons.h"
#include "engine.h"
#include "errors.h"
#include "filesel.h" // Get_item_by_index
#include "global.h"
#include "graph.h"
#include "io.h" // find_last_slash
#include "misc.h"
#include "pages.h" // Backup()
#include "readline.h"
#include "sdlscreen.h"
#include "windows.h"
#include "palette.h"
#include "input.h" // Is_shortcut()
#include "help.h" // Window_help()
#ifdef __ENABLE_LUA__
#include <lua.h>
#include <lauxlib.h>
#include <lualib.h>
#include <float.h> // for DBL_MAX
///
/// Number of characters for name in fileselector.
/// Window is adjusted according to it.
#define NAME_WIDTH 34
/// Position of fileselector top, in window space
#define FILESEL_Y 18
// Work data that can be used during a script
static byte * Brush_backup = NULL;
static word Brush_backup_width;
static word Brush_backup_height;
static byte Palette_has_changed;
static byte Brush_was_altered;
/// Helper function to clamp a double to 0-255 range
static inline byte clamp_byte(double value)
{
if (value<0.0)
return 0;
else if (value>255.0)
return 255;
else return (byte)value;
}
///
/// This macro reads a Lua argument into a double or integral lvalue.
/// If argument is invalid, it will break the caller and raise a verbose message.
/// This macro uses 2 existing symbols: L for the context, and nb_args=lua_gettop(L)
/// @param index Index of the argument to check, starting at 1.
/// @param func_name The name of the lua callback, to display a message in case of error.
/// @param dest Destination lvalue. Can be a double, or any integral type. Conversion will "floor".
/// @param min_value Check for minimum value. Pass a double, or if you don't care, -DBL_MAX.
/// @param max_value Check for maximum value. Pass a double, or if you don't care, DBL_MAX.
#define LUA_ARG_NUMBER(index, func_name, dest, min_value, max_value) \
do { \
double value; \
if (nb_args < (index)) return luaL_error(L, "%s: Argument %d is missing.", func_name, (index)); \
if (!lua_isnumber(L, (index))) return luaL_error(L, "%s: Argument %d is not a number.", func_name, (index)); \
value = lua_tonumber(L, (index)); \
if ((min_value) != -DBL_MAX && value<(min_value)) return luaL_error(L, "%s: Argument %d was too small, it had value of %f and minimum should be %f.", func_name, (index), value, (double)(min_value)); \
if ((max_value) != DBL_MAX && value>(max_value)) return luaL_error(L, "%s: Argument %d was too big, it had value of %f and maximum should be %f.", func_name, (index), value, (double)(max_value)); \
dest = value; \
} while(0)
///
/// This macro reads a Lua argument into a string.
/// If argument is invalid, it will break the caller and raise a verbose message.
/// This macro uses 2 existing symbols: L for the context, and nb_args=lua_gettop(L)
/// @param index Index of the argument to check, starting at 1.
/// @param func_name The name of the lua callback, to display a message in case of error.
/// @param dest Destination string pointer, ideally a const char *.
#define LUA_ARG_STRING(index, func_name, dest) \
do { \
if (nb_args < (index)) return luaL_error(L, "%s: Argument %d is missing.", func_name, index); \
if (!lua_isstring(L, (index))) return luaL_error(L, "%s: Argument %d is not a string.", func_name, index); \
dest = lua_tostring(L, (index)); \
} while (0)
/// Check if 'num' arguments were provided exactly
#define LUA_ARG_LIMIT(num, func_name) \
do { \
if (nb_args != (num)) \
return luaL_error(L, "%s: Expected %d arguments, but found %d.", func_name, (num), nb_args); \
} while(0)
// Wrapper functions to call C from Lua
int L_SetBrushSize(lua_State* L)
{
int w;
int h;
int nb_args=lua_gettop(L);
LUA_ARG_LIMIT (2, "setbrushsize");
LUA_ARG_NUMBER(1, "setbrushsize", w, 1, 10000);
LUA_ARG_NUMBER(2, "setbrushsize", h, 1, 10000);
if (Realloc_brush(w, h))
{
return luaL_error(L, "setbrushsize: Resize failed");
}
Brush_was_altered=1;
// Fill with Back_color
memset(Brush,Back_color,(long)Brush_width*Brush_height);
// Center the handle
Brush_offset_X=(Brush_width>>1);
Brush_offset_Y=(Brush_height>>1);
return 0;
}
int L_GetBrushSize(lua_State* L)
{
lua_pushinteger(L, Brush_width);
lua_pushinteger(L, Brush_height);
return 2;
}
int L_GetBrushTransparentColor(lua_State* L)
{
lua_pushinteger(L, Back_color);
return 1;
}
int L_PutBrushPixel(lua_State* L)
{
int x;
int y;
uint8_t c;
int nb_args=lua_gettop(L);
LUA_ARG_LIMIT (3, "putbrushpixel");
LUA_ARG_NUMBER(1, "putbrushpixel", x, INT_MIN, INT_MAX);
LUA_ARG_NUMBER(2, "putbrushpixel", y, INT_MIN, INT_MAX);
LUA_ARG_NUMBER(3, "putbrushpixel", c, INT_MIN, INT_MAX);
Brush_was_altered=1;
if (x<0 || y<0 || x>=Brush_width || y>=Brush_height)
;
else
{
Pixel_in_brush(x, y, c);
}
return 0; // no values returned for lua
}
int L_GetBrushPixel(lua_State* L)
{
int x;
int y;
uint8_t c;
int nb_args=lua_gettop(L);
LUA_ARG_LIMIT (2, "getbrushpixel");
LUA_ARG_NUMBER(1, "getbrushpixel", x, INT_MIN, INT_MAX);
LUA_ARG_NUMBER(2, "getbrushpixel", y, INT_MIN, INT_MAX);
if (x<0 || y<0 || x>=Brush_width || y>=Brush_height)
{
c = Back_color; // Return 'transparent'
}
else
{
c = Read_pixel_from_brush(x, y);
}
lua_pushinteger(L, c);
return 1;
}
int L_GetBrushBackupPixel(lua_State* L)
{
int x;
int y;
uint8_t c;
int nb_args=lua_gettop(L);
LUA_ARG_LIMIT (2, "getbrushbackuppixel");
LUA_ARG_NUMBER(1, "getbrushbackuppixel", x, INT_MIN, INT_MAX);
LUA_ARG_NUMBER(2, "getbrushbackuppixel", y, INT_MIN, INT_MAX);
if (x<0 || y<0 || x>=Brush_backup_width || y>=Brush_backup_height)
{
c = Back_color; // Return 'transparent'
}
else
{
c = *(Brush_backup + y * Brush_backup_width + x);
}
lua_pushinteger(L, c);
return 1;
}
int L_SetPictureSize(lua_State* L)
{
int w;
int h;
int nb_args=lua_gettop(L);
LUA_ARG_LIMIT (2, "setpicturesize");
LUA_ARG_NUMBER(1, "setpicturesize", w, 1, 9999);
LUA_ARG_NUMBER(2, "setpicturesize", h, 1, 9999);
Resize_image(w, h); // TODO: a return value to catch runtime errors
return 0;
}
int L_GetPictureSize(lua_State* L)
{
lua_pushinteger(L, Main_image_width);
lua_pushinteger(L, Main_image_height);
return 2;
}
int L_ClearPicture(lua_State* L)
{
int c;
int nb_args=lua_gettop(L);
LUA_ARG_LIMIT (1, "clearpicture");
LUA_ARG_NUMBER(1, "clearpicture", c, INT_MIN, INT_MAX);
if (Stencil_mode && Config.Clear_with_stencil)
Clear_current_image_with_stencil(c,Stencil);
else
Clear_current_image(c);
Redraw_layered_image();
return 0; // no values returned for lua
}
int L_PutPicturePixel(lua_State* L)
{
int x;
int y;
int c;
int nb_args=lua_gettop(L);
LUA_ARG_LIMIT (3, "putpicturepixel");
LUA_ARG_NUMBER(1, "putpicturepixel", x, INT_MIN, INT_MAX);
LUA_ARG_NUMBER(2, "putpicturepixel", y, INT_MIN, INT_MAX);
LUA_ARG_NUMBER(3, "putpicturepixel", c, INT_MIN, INT_MAX);
// Bound check
if (x<0 || y<0 || x>=Main_image_width || y>=Main_image_height)
{
// Silently ignored
return 0;
}
Pixel_in_current_screen(x, y, c, 0);
return 0; // no values returned for lua
}
int L_GetPicturePixel(lua_State* L)
{
int x;
int y;
int nb_args=lua_gettop(L);
LUA_ARG_LIMIT (2, "getpicturepixel");
LUA_ARG_NUMBER(1, "getpicturepixel", x, INT_MIN, INT_MAX);
LUA_ARG_NUMBER(2, "getpicturepixel", y, INT_MIN, INT_MAX);
// Bound check
if (x<0 || y<0 || x>=Main_image_width || y>=Main_image_height)
{
// Silently return the image's transparent color
lua_pushinteger(L, Main_backups->Pages->Transparent_color);
return 1;
}
lua_pushinteger(L, Read_pixel_from_current_screen(x,y));
return 1;
}
int L_GetBackupPixel(lua_State* L)
{
int x;
int y;
int nb_args=lua_gettop(L);
LUA_ARG_LIMIT (2, "getbackuppixel");
LUA_ARG_NUMBER(1, "getbackuppixel", x, INT_MIN, INT_MAX);
LUA_ARG_NUMBER(2, "getbackuppixel", y, INT_MIN, INT_MAX);
// Bound check
if (x<0 || y<0 || x>=Main_image_width || y>=Main_image_height)
{
// Silently return the image's transparent color
lua_pushinteger(L, Main_backups->Pages->Transparent_color);
return 1;
}
lua_pushinteger(L, Read_pixel_from_backup_screen(x,y));
return 1;
}
int L_GetLayerPixel(lua_State* L)
{
int x;
int y;
int nb_args=lua_gettop(L);
LUA_ARG_LIMIT (2, "getlayerpixel");
LUA_ARG_NUMBER(1, "getlayerpixel", x, INT_MIN, INT_MAX);
LUA_ARG_NUMBER(2, "getlayerpixel", y, INT_MIN, INT_MAX);
// Bound check
if (x<0 || y<0 || x>=Main_image_width || y>=Main_image_height)
{
// Silently return the image's transparent color
lua_pushinteger(L, Main_backups->Pages->Transparent_color);
return 1;
}
lua_pushinteger(L, Read_pixel_from_current_layer(x,y));
return 1;
}
// Spare
int L_GetSparePictureSize(lua_State* L)
{
lua_pushinteger(L, Spare_image_width);
lua_pushinteger(L, Spare_image_height);
return 2;
}
int L_GetSpareLayerPixel(lua_State* L)
{
int x;
int y;
int nb_args=lua_gettop(L);
LUA_ARG_LIMIT (2, "getsparelayerpixel");
LUA_ARG_NUMBER(1, "getsparelayerpixel", x, INT_MIN, INT_MAX);
LUA_ARG_NUMBER(2, "getsparelayerpixel", y, INT_MIN, INT_MAX);
// Bound check
if (x<0 || y<0 || x>=Spare_image_width || y>=Spare_image_height)
{
// Silently return the image's transparent color
lua_pushinteger(L, Spare_backups->Pages->Transparent_color);
return 1;
}
lua_pushinteger(L, *(Spare_backups->Pages->Image[Spare_current_layer] + y*Spare_image_width + x));
return 1;
}
int L_GetSparePicturePixel(lua_State* L)
{
int x;
int y;
int nb_args=lua_gettop(L);
LUA_ARG_LIMIT (2, "getsparepicturepixel");
LUA_ARG_NUMBER(1, "getsparepicturepixel", x, INT_MIN, INT_MAX);
LUA_ARG_NUMBER(2, "getsparepicturepixel", y, INT_MIN, INT_MAX);
// Some bound checking is done by the function itself, here's the rest.
if (x<0 || y<0)
{
// Silently return the image's transparent color
lua_pushinteger(L, Spare_backups->Pages->Transparent_color);
return 1;
}
lua_pushinteger(L, Read_pixel_from_spare_screen(x,y));
return 1;
}
int L_GetSpareColor(lua_State* L)
{
byte c;
int nb_args=lua_gettop(L);
LUA_ARG_LIMIT (1, "getsparecolor");
LUA_ARG_NUMBER(1, "getsparecolor", c, INT_MIN, INT_MAX);
lua_pushinteger(L, Spare_palette[c].R);
lua_pushinteger(L, Spare_palette[c].G);
lua_pushinteger(L, Spare_palette[c].B);
return 3;
}
int L_GetSpareTransColor(lua_State* L)
{
lua_pushinteger(L, Spare_backups->Pages->Transparent_color);
return 1;
}
int L_SetColor(lua_State* L)
{
byte c;
double r, g, b;
int nb_args=lua_gettop(L);
LUA_ARG_LIMIT (4, "setcolor");
LUA_ARG_NUMBER(1, "setcolor", c, INT_MIN, INT_MAX);
LUA_ARG_NUMBER(2, "setcolor", r, INT_MIN, INT_MAX);
LUA_ARG_NUMBER(3, "setcolor", g, INT_MIN, INT_MAX);
LUA_ARG_NUMBER(4, "setcolor", b, INT_MIN, INT_MAX);
Main_palette[c].R=Round_palette_component(clamp_byte(r));
Main_palette[c].G=Round_palette_component(clamp_byte(g));
Main_palette[c].B=Round_palette_component(clamp_byte(b));
// Set_color(c, r, g, b); Not needed. Update screen when script is finished
Palette_has_changed=1;
return 0;
}
int L_GetColor(lua_State* L)
{
byte c;
int nb_args=lua_gettop(L);
LUA_ARG_LIMIT (1, "getcolor");
LUA_ARG_NUMBER(1, "getcolor", c, INT_MIN, INT_MAX);
lua_pushinteger(L, Main_palette[c].R);
lua_pushinteger(L, Main_palette[c].G);
lua_pushinteger(L, Main_palette[c].B);
return 3;
}
int L_GetBackupColor(lua_State* L)
{
byte c;
int nb_args=lua_gettop(L);
LUA_ARG_LIMIT (1, "getbackupcolor");
LUA_ARG_NUMBER(1, "getbackupcolor", c, INT_MIN, INT_MAX);
lua_pushinteger(L, Main_backups->Pages->Next->Palette[c].R);
lua_pushinteger(L, Main_backups->Pages->Next->Palette[c].G);
lua_pushinteger(L, Main_backups->Pages->Next->Palette[c].B);
return 3;
}
int L_MatchColor(lua_State* L)
{
double r, g, b;
int c;
int nb_args=lua_gettop(L);
LUA_ARG_LIMIT (3, "matchcolor");
LUA_ARG_NUMBER(1, "matchcolor", r, -DBL_MAX, DBL_MAX);
LUA_ARG_NUMBER(2, "matchcolor", g, -DBL_MAX, DBL_MAX);
LUA_ARG_NUMBER(3, "matchcolor", b, -DBL_MAX, DBL_MAX);
c = Best_color_nonexcluded(clamp_byte(r),clamp_byte(g),clamp_byte(b));
lua_pushinteger(L, c);
return 1;
}
int L_GetForeColor(lua_State* L)
{
lua_pushinteger(L, Fore_color);
return 1;
}
int L_GetBackColor(lua_State* L)
{
lua_pushinteger(L, Back_color);
return 1;
}
int L_GetTransColor(lua_State* L)
{
lua_pushinteger(L, Main_backups->Pages->Transparent_color);
return 1;
}
int L_InputBox(lua_State* L)
{
const int max_settings = 9;
const int args_per_setting = 5;
double min_value[max_settings];
double max_value[max_settings];
byte decimal_places[max_settings];
double current_value[max_settings];
const char * label[max_settings];
unsigned short control[max_settings*3+1]; // Each value has at most 3 widgets.
enum CONTROL_TYPE {
CONTROL_OK = 0x0100,
CONTROL_CANCEL = 0x0200,
CONTROL_INPUT = 0x0300,
CONTROL_INPUT_MINUS = 0x0400,
CONTROL_INPUT_PLUS = 0x0500,
CONTROL_CHECKBOX = 0x0600,
CONTROL_VALUE_MASK = 0x00FF,
CONTROL_TYPE_MASK = 0xFF00
};
const char * window_caption;
int caption_length;
int nb_settings;
int nb_args;
unsigned int max_label_length;
int setting;
short clicked_button;
char str[40];
short close_window = 0;
nb_args = lua_gettop (L);
if (nb_args < 6)
{
return luaL_error(L, "inputbox: Less than 6 arguments");
}
if ((nb_args - 1) % args_per_setting)
{
return luaL_error(L, "inputbox: Wrong number of arguments");
}
nb_settings = (nb_args-1)/args_per_setting;
if (nb_settings > max_settings)
{
return luaL_error(L, "inputbox: Too many settings, limit reached");
}
max_label_length=4; // Minimum size to account for OK / Cancel buttons
// First argument is window caption
LUA_ARG_STRING(1, "inputbox", window_caption);
caption_length = strlen(window_caption);
if ( caption_length > 14)
max_label_length = caption_length - 10;
for (setting=0; setting<nb_settings; setting++)
{
LUA_ARG_STRING(setting*args_per_setting+2, "inputbox", label[setting]);
if (strlen(label[setting]) > max_label_length)
max_label_length = strlen(label[setting]);
LUA_ARG_NUMBER(setting*args_per_setting+3, "inputbox", current_value[setting], -DBL_MAX, DBL_MAX);
LUA_ARG_NUMBER(setting*args_per_setting+4, "inputbox", min_value[setting], -DBL_MAX, DBL_MAX);
/*if (min_value[setting] < -999999999999999.0)
min_value[setting] = -999999999999999.0;*/
LUA_ARG_NUMBER(setting*args_per_setting+5, "inputbox", max_value[setting], -DBL_MAX, DBL_MAX);
/*if (max_value[setting] > 999999999999999.0)
max_value[setting] = 999999999999999.0;*/
LUA_ARG_NUMBER(setting*args_per_setting+6, "inputbox", decimal_places[setting], INT_MIN, INT_MAX);
if (decimal_places[setting]>15)
decimal_places[setting]=15;
// Keep current value in range
current_value[setting] = Fround(current_value[setting], decimal_places[setting]);
if (current_value[setting] < min_value[setting])
current_value[setting] = min_value[setting];
else if (current_value[setting] > max_value[setting])
current_value[setting] = max_value[setting];
}
// Max is 25 to keep window under 320 pixel wide
if (max_label_length>25)
max_label_length=25;
Open_window(115+max_label_length*8,44+nb_settings*17,window_caption);
// OK
Window_set_normal_button( 7, 25 + 17 * nb_settings, 51,14,"OK" , 0,1,SDLK_RETURN);
control[Window_nb_buttons] = CONTROL_OK;
// Cancel
Window_set_normal_button( 64, 25 + 17 * nb_settings, 51,14,"Cancel" , 0,1,KEY_ESC);
control[Window_nb_buttons] = CONTROL_CANCEL;
for (setting=0; setting<nb_settings; setting++)
{
Print_in_window_limited(12,22+setting*17,label[setting],max_label_length,MC_Black,MC_Light);
if (min_value[setting]==0 && max_value[setting]==1)
{
// Checkbox
Window_set_normal_button(12+max_label_length*8+42, 19+setting*17, 15,13,current_value[setting]?"X":"", 0,1,KEY_NONE);
control[Window_nb_buttons] = CONTROL_CHECKBOX | setting;
}
else
{
// - Button
Window_set_repeatable_button(12+max_label_length*8+5, 20+setting*17, 13,11,"-" , 0,1,KEY_NONE);
control[Window_nb_buttons] = CONTROL_INPUT_MINUS | setting;
// Numeric input field
Window_set_input_button(12+max_label_length*8+21, 20+setting*17,7);
// Print editable value
Sprint_double(str,current_value[setting],decimal_places[setting],7);
Print_in_window_limited(12+max_label_length*8+23, 22+setting*17, str, 7,MC_Black,MC_Light);
//
control[Window_nb_buttons] = CONTROL_INPUT | setting;
// + Button
Window_set_repeatable_button(12+max_label_length*8+84, 20+setting*17, 13,11,"+" , 0,1,KEY_NONE);
control[Window_nb_buttons] = CONTROL_INPUT_PLUS | setting;
}
}
Update_window_area(0,0,Window_width, Window_height);
Cursor_shape=CURSOR_SHAPE_ARROW;
Display_cursor();
while (!close_window)
{
clicked_button=Window_clicked_button();
if (clicked_button>0)
{
setting = control[clicked_button] & (CONTROL_VALUE_MASK);
switch (control[clicked_button] & CONTROL_TYPE_MASK)
{
case CONTROL_OK:
close_window = CONTROL_OK;
break;
case CONTROL_CANCEL:
close_window = CONTROL_CANCEL;
break;
case CONTROL_INPUT:
Sprint_double(str,current_value[setting],decimal_places[setting],0);
Readline_ex(12+max_label_length*8+23, 22+setting*17,str,7,40,3,decimal_places[setting]);
current_value[setting]=atof(str);
if (current_value[setting] < min_value[setting])
current_value[setting] = min_value[setting];
else if (current_value[setting] > max_value[setting])
current_value[setting] = max_value[setting];
// Print editable value
Sprint_double(str,current_value[setting],decimal_places[setting],7);
Print_in_window_limited(12+max_label_length*8+23, 22+setting*17, str, 7,MC_Black,MC_Light);
//
Display_cursor();
break;
case CONTROL_INPUT_MINUS:
if (current_value[setting] > min_value[setting])
{
current_value[setting]--;
if (current_value[setting] < min_value[setting])
current_value[setting] = min_value[setting];
Hide_cursor();
// Print editable value
Sprint_double(str,current_value[setting],decimal_places[setting],7);
Print_in_window_limited(12+max_label_length*8+23, 22+setting*17, str, 7,MC_Black,MC_Light);
//
Display_cursor();
}
break;
case CONTROL_INPUT_PLUS:
if (current_value[setting] < max_value[setting])
{
current_value[setting]++;
if (current_value[setting] > max_value[setting])
current_value[setting] = max_value[setting];
Hide_cursor();
// Print editable value
Sprint_double(str,current_value[setting],decimal_places[setting],7);
Print_in_window_limited(12+max_label_length*8+23, 22+setting*17, str, 7,MC_Black,MC_Light);
//
Display_cursor();
}
break;
case CONTROL_CHECKBOX:
current_value[setting] = (current_value[setting]<0.5);
Hide_cursor();
Print_in_window(12+max_label_length*8+46, 22+setting*17, current_value[setting]?"X":" ",MC_Black,MC_Light);
Display_cursor();
break;
}
}
}
Close_window();
Cursor_shape=CURSOR_SHAPE_HOURGLASS;
Display_cursor();
// Return values:
// One boolean to tell if user pressed ok or cancel
lua_pushboolean(L, (close_window == CONTROL_OK));
// One value per control
for (setting=0; setting<nb_settings; setting++)
lua_pushnumber(L, current_value[setting]);
return 1 + nb_settings;
}
int L_MessageBox(lua_State* L)
{
const char * caption;
const char * message;
int nb_args = lua_gettop (L);
if (nb_args == 1)
{
caption = "Script message";
LUA_ARG_STRING(1, "messagebox", message);
}
else if (nb_args == 2)
{
LUA_ARG_STRING(1, "messagebox", caption);
LUA_ARG_STRING(2, "messagebox", message);
}
else
{
return luaL_error(L, "messagebox: Needs one or two arguments.");
}
Verbose_message(caption, message);
return 0;
}
// Handlers for window internals
T_Fileselector Scripts_list;
// Callback to display a skin name in the list
void Draw_script_name(word x, word y, word index, byte highlighted)
{
T_Fileselector_item * current_item;
if (Scripts_list.Nb_elements)
{
short name_size;
current_item = Get_item_by_index(&Scripts_list, index);
Print_in_window_limited(x, y, current_item->Full_name, NAME_WIDTH, MC_Black,
(highlighted)?MC_Dark:MC_Light);
name_size=strlen(current_item->Full_name);
// Clear remaining area on the right
if (name_size<NAME_WIDTH)
Window_rectangle(x+name_size*8,y,(NAME_WIDTH-name_size)*8,8,(highlighted)?MC_Dark:MC_Light);
Update_window_area(x,y,NAME_WIDTH*8,8);
}
}
///
/// Displays first lines of comments from a lua script in the window.
void Draw_script_information(T_Fileselector_item * script_item)
{
FILE *script_file;
char full_name[MAX_PATH_CHARACTERS];
char text_block[3][NAME_WIDTH+3];
int x, y;
// Blank the target area
Window_rectangle(7, FILESEL_Y + 89, (NAME_WIDTH+2)*8+2, 3*8, MC_Black);
if (script_item && script_item->Full_name && script_item->Full_name[0]!='\0')
{
strcpy(full_name, Data_directory);
strcat(full_name, "scripts/");
strcat(full_name, script_item->Full_name);
x=0;
y=0;
text_block[0][0] = text_block[1][0] = text_block[2][0] = '\0';
// Start reading
script_file = fopen(full_name, "r");
if (script_file != NULL)
{
int c;
c = fgetc(script_file);
while (c != EOF && y<3)
{
if (c == '\n')
{
if (x<2)
break; // Carriage return without comment: Stopping
y++;
x=0;
}
else if (x==0 || x==1)
{
if (c != '-')
break; // Non-comment line was encountered. Stopping.
x++;
}
else
{
if (x < NAME_WIDTH+4)
{
// Adding character
text_block[y][x-2] = (c<32 || c>255) ? ' ' : c;
text_block[y][x-1] = '\0';
}
x++;
}
// Read next
c = fgetc(script_file);
}
fclose(script_file);
}
Print_in_window(7, FILESEL_Y + 89 , text_block[0], MC_Light, MC_Black);
Print_in_window(7, FILESEL_Y + 89+ 8, text_block[1], MC_Light, MC_Black);
Print_in_window(7, FILESEL_Y + 89+16, text_block[2], MC_Light, MC_Black);
}
Update_window_area(7, FILESEL_Y + 89, (NAME_WIDTH+2)*8+2, 3*8);
}
// Add a script to the list
void Add_script(const char *name)
{
Add_element_to_list(&Scripts_list, Find_last_slash(name)+1, 0);
}
void Highlight_script(T_Fileselector *selector, T_List_button *list, const char *selected_script)
{
short index;
index=Find_file_in_fileselector(selector, selected_script);
if ((list->Scroller->Nb_elements<=list->Scroller->Nb_visibles) || (index<list->Scroller->Nb_visibles/2))
{
list->List_start=0;
list->Cursor_position=index;
}
else
{
if (index>=list->Scroller->Nb_elements-list->Scroller->Nb_visibles/2)
{
list->List_start=list->Scroller->Nb_elements-list->Scroller->Nb_visibles;
list->Cursor_position=index-list->List_start;
}
else
{
list->List_start=index-(list->Scroller->Nb_visibles-1)/2;
list->Cursor_position=(list->Scroller->Nb_visibles-1)/2;
}
}
}
void Button_Brush_Factory(void)
{
short clicked_button;
T_List_button* scriptlist;
T_Scroller_button* scriptscroll;
char scriptdir[MAX_PATH_CHARACTERS];
static char selected_script[MAX_PATH_CHARACTERS]="";
Open_window(33+8*NAME_WIDTH, 162, "Brush Factory");
// Here we use the same data container as the fileselectors.
// Reinitialize the list
Free_fileselector_list(&Scripts_list);
strcpy(scriptdir, Data_directory);
strcat(scriptdir, "scripts/");
// Add each found file to the list
For_each_file(scriptdir, Add_script);
// Sort it
Sort_list_of_files(&Scripts_list);
Window_set_normal_button(85, 141, 67, 14, "Cancel", 0, 1, KEY_ESC); // 1
Window_set_normal_button(10, 141, 67, 14, "Run", 0, 1, SDLK_RETURN); // 2
Window_display_frame_in(6, FILESEL_Y - 2, NAME_WIDTH*8+4, 84); // File selector
scriptlist = Window_set_list_button(
// Fileselector
Window_set_special_button(8, FILESEL_Y + 1, NAME_WIDTH*8, 80), // 3
// Scroller for the fileselector
(scriptscroll = Window_set_scroller_button(NAME_WIDTH*8+14, FILESEL_Y - 1, 82,
Scripts_list.Nb_elements,10, 0)), // 4
Draw_script_name); // 5
Window_display_frame_in(6, FILESEL_Y + 88, (NAME_WIDTH+2)*8+4, 3*8+2); // Descr.
// Update position
Highlight_script(&Scripts_list, scriptlist, selected_script);
// Update the scroller position
scriptscroll->Position=scriptlist->List_start;
if (scriptscroll->Position)
Window_draw_slider(scriptscroll);
Window_redraw_list(scriptlist);
Draw_script_information(Get_item_by_index(&Scripts_list,
scriptlist->List_start + scriptlist->Cursor_position));
Update_window_area(0, 0, Window_width, Window_height);
Display_cursor();
do
{
clicked_button = Window_clicked_button();
if (Is_shortcut(Key,0x100+BUTTON_HELP))
Window_help(BUTTON_BRUSH_EFFECTS, "BRUSH FACTORY");
switch (clicked_button)
{
case 5:
Hide_cursor();
Draw_script_information(Get_item_by_index(&Scripts_list,
scriptlist->List_start + scriptlist->Cursor_position));
Display_cursor();
break;
default:
break;
}
} while (clicked_button <= 0 || clicked_button >= 3);
strcpy(selected_script, Get_item_by_index(&Scripts_list,
scriptlist->List_start + scriptlist->Cursor_position)-> Full_name);
if (clicked_button == 2) // Run the script
{
lua_State* L;
const char* message;
// Some scripts are slow
Hide_cursor();
Cursor_shape=CURSOR_SHAPE_HOURGLASS;
Display_cursor();
Flush_update();
chdir(scriptdir);
L = lua_open();
lua_register(L,"putbrushpixel",L_PutBrushPixel);
lua_register(L,"getbrushpixel",L_GetBrushPixel);
lua_register(L,"getbrushbackuppixel",L_GetBrushBackupPixel);
lua_register(L,"putpicturepixel",L_PutPicturePixel);
lua_register(L,"getpicturepixel",L_GetPicturePixel);
lua_register(L,"getlayerpixel",L_GetLayerPixel);
lua_register(L,"getbackuppixel",L_GetBackupPixel);
lua_register(L,"setbrushsize",L_SetBrushSize);
lua_register(L,"setpicturesize",L_SetPictureSize);
lua_register(L,"getbrushsize",L_GetBrushSize);
lua_register(L,"getpicturesize",L_GetPictureSize);
lua_register(L,"setcolor",L_SetColor);
lua_register(L,"getcolor",L_GetColor);
lua_register(L,"getbackupcolor",L_GetBackupColor);
lua_register(L,"matchcolor",L_MatchColor);
lua_register(L,"getbrushtransparentcolor",L_GetBrushTransparentColor);
lua_register(L,"inputbox",L_InputBox);
lua_register(L,"messagebox",L_MessageBox);
lua_register(L,"getforecolor",L_GetForeColor);
lua_register(L,"getbackcolor",L_GetBackColor);
lua_register(L,"gettranscolor",L_GetTransColor);
lua_register(L,"getsparepicturesize ",L_GetSparePictureSize);
lua_register(L,"getsparelayerpixel ",L_GetSpareLayerPixel);
lua_register(L,"getsparepicturepixel",L_GetSparePicturePixel);
lua_register(L,"getsparecolor",L_GetSpareColor);
lua_register(L,"getsparetranscolor",L_GetSpareTransColor);
lua_register(L,"clearpicture",L_ClearPicture);
// For debug only
// luaL_openlibs(L);
luaopen_base(L);
luaopen_math(L);
strcat(scriptdir, selected_script);
// TODO The script may modify the picture, so we do a backup here.
// If the script is only touching the brush, this isn't needed...
// The backup also allows the script to read from it to make something
// like a feedback off effect (convolution matrix comes to mind).
Backup();
Palette_has_changed=0;
Brush_was_altered=0;
// Backup the brush
Brush_backup=(byte *)malloc(((long)Brush_height)*Brush_width);
Brush_backup_width = Brush_width;
Brush_backup_height = Brush_height;
if (Brush_backup == NULL)
{
Verbose_message("Error!", "Out of memory!");
}
else
{
memcpy(Brush_backup, Brush, ((long)Brush_height)*Brush_width);
if (luaL_loadfile(L,scriptdir) != 0)
{
int stack_size;
stack_size= lua_gettop(L);
if (stack_size>0 && (message = lua_tostring(L, stack_size))!=NULL)
Verbose_message("Error!", message);
else
Warning_message("Unknown error loading script!");
}
else if (lua_pcall(L, 0, 0, 0) != 0)
{
int stack_size;
stack_size= lua_gettop(L);
if (stack_size>0 && (message = lua_tostring(L, stack_size))!=NULL)
Verbose_message("Error running script", message);
else
Warning_message("Unknown error running script!");
}
}
// Cleanup
free(Brush_backup);
Brush_backup=NULL;
if (Palette_has_changed)
{
Set_palette(Main_palette);
Compute_optimal_menu_colors(Main_palette);
}
End_of_modification();
lua_close(L);
}
Close_window();
if (Brush_was_altered)
Change_paintbrush_shape(PAINTBRUSH_SHAPE_COLOR_BRUSH);
Unselect_button(BUTTON_BRUSH_EFFECTS);
Display_all_screen();
Display_cursor();
}
#else // NOLUA
void Button_Brush_Factory(void)
{
Verbose_message("Error!", "The brush factory is not available in this build of GrafX2.");
}
#endif
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