Added "Brush Factory", allowing you to run a lua script to generate (or alter, untested yet) a brush.

Added a simple (and ugly) sample script.
This needs updates to the makefile for platforms other than linux.
TODO: add a listbox to select the script you want to run. Do we have a simple API to handle filelists yet ?


git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@1094 416bcca6-2ee7-4201-b75f-2eb2f807beb1

Makefile

@@ -227,8 +227,8 @@ else
 
         # Compiles a regular linux exectutable for the native platform
         BIN = grafx2
-        COPT = -W -Wall -Wdeclaration-after-statement -std=c99 -c -g `sdl-config --cflags` $(TTFCOPT)
+        COPT = -W -Wall -Wdeclaration-after-statement -std=c99 -c -g `sdl-config --cflags` $(TTFCOPT) $(LUACOPT)
-        LOPT = `sdl-config --libs` -lSDL_image $(TTFLOPT) -lpng
+        LOPT = `sdl-config --libs` -lSDL_image $(TTFLOPT) -lpng $(LUALOPT)
 		# Use gcc for compiling. Use ncc to build a callgraph and analyze the code.
 		CC = gcc
 		#CC = nccgen -ncgcc -ncld -ncfabs
@@ -253,6 +253,17 @@ else
   TTFLABEL = 
 endif
 
+#Lua scripting is optional too
+ifeq ($(NOLUA),1)
+	LUACOPT =
+	LUALOPT =
+	LUALABEL = -nolua
+else
+	LUACOPT = -D__ENABLE_LUA__
+	LUALOPT = -llua5.1
+	LUALABEL =
+endif
+
 #To disable Joystick emulation of cursor, make NOJOY=1 (for input.o)
 #This can be necessary to test keyboard cursor code, because an existing
 #joystick will keep reporting a contradicting position.
@@ -267,7 +278,7 @@ endif
 .PHONY : all debug release clean depend zip version force install uninstall
 
 # This is the list of the objects we want to build. Dependancies are built by "make depend" automatically.
-OBJ = $(OBJDIR)/main.o $(OBJDIR)/init.o $(OBJDIR)/graph.o $(OBJDIR)/sdlscreen.o  $(OBJDIR)/misc.o $(OBJDIR)/special.o $(OBJDIR)/buttons.o $(OBJDIR)/palette.o $(OBJDIR)/help.o $(OBJDIR)/operatio.o $(OBJDIR)/pages.o $(OBJDIR)/loadsave.o $(OBJDIR)/readline.o $(OBJDIR)/engine.o $(OBJDIR)/filesel.o $(OBJDIR)/op_c.o $(OBJDIR)/readini.o $(OBJDIR)/saveini.o $(OBJDIR)/shade.o $(OBJDIR)/keyboard.o $(OBJDIR)/io.o $(OBJDIR)/version.o $(OBJDIR)/text.o $(OBJDIR)/SFont.o $(OBJDIR)/setup.o $(OBJDIR)/pxsimple.o $(OBJDIR)/pxtall.o $(OBJDIR)/pxwide.o $(OBJDIR)/pxdouble.o $(OBJDIR)/pxtriple.o $(OBJDIR)/pxtall2.o $(OBJDIR)/pxwide2.o $(OBJDIR)/pxquad.o $(OBJDIR)/windows.o $(OBJDIR)/brush.o $(OBJDIR)/realpath.o $(OBJDIR)/mountlist.o $(OBJDIR)/input.o $(OBJDIR)/hotkeys.o $(OBJDIR)/transform.o $(OBJDIR)/pversion.o $(PLATFORMOBJ)
+OBJ = $(OBJDIR)/main.o $(OBJDIR)/init.o $(OBJDIR)/graph.o $(OBJDIR)/sdlscreen.o  $(OBJDIR)/misc.o $(OBJDIR)/special.o $(OBJDIR)/buttons.o $(OBJDIR)/palette.o $(OBJDIR)/help.o $(OBJDIR)/operatio.o $(OBJDIR)/pages.o $(OBJDIR)/loadsave.o $(OBJDIR)/readline.o $(OBJDIR)/engine.o $(OBJDIR)/filesel.o $(OBJDIR)/op_c.o $(OBJDIR)/readini.o $(OBJDIR)/saveini.o $(OBJDIR)/shade.o $(OBJDIR)/keyboard.o $(OBJDIR)/io.o $(OBJDIR)/version.o $(OBJDIR)/text.o $(OBJDIR)/SFont.o $(OBJDIR)/setup.o $(OBJDIR)/pxsimple.o $(OBJDIR)/pxtall.o $(OBJDIR)/pxwide.o $(OBJDIR)/pxdouble.o $(OBJDIR)/pxtriple.o $(OBJDIR)/pxtall2.o $(OBJDIR)/pxwide2.o $(OBJDIR)/pxquad.o $(OBJDIR)/windows.o $(OBJDIR)/brush.o $(OBJDIR)/realpath.o $(OBJDIR)/mountlist.o $(OBJDIR)/input.o $(OBJDIR)/hotkeys.o $(OBJDIR)/transform.o $(OBJDIR)/pversion.o $(OBJDIR)/factory.o $(PLATFORMOBJ)
 
 SKIN_FILES = skins/skin_classic.png skins/skin_modern.png skins/font_Classic.png skins/font_Fun.png
 

brush.h

@@ -25,6 +25,8 @@
 #ifndef __BRUSH_H_
 #define __BRUSH_H_
 
+#include "struct.h"
+
 /*!
     Gets the brush from the picture.
     @param start_x left edge coordinate in the picture

buttons.h

@@ -17,10 +17,10 @@
     along with Grafx2; if not, see <http://www.gnu.org/licenses/>
 */
 
-//////////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////
 ///@file buttons.h
 /// Almost all the editor actions that are called by the menu are here.
-//////////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////
 
 #ifndef __BOUTONS_H_
 #define __BOUTONS_H_
@@ -28,19 +28,21 @@
 #include "struct.h"
 
 /*!
-    Displays an error message when there is no more memory for the requested operation. 
+	Displays an error message when there is no more memory for the requested
+	operation.
 */
 void Message_out_of_memory(void);
 
 /*!
-    Displays the splash screen at program startup.
+	Displays the splash screen at program startup.
 */
 void Button_Message_initial(void);
 
 /*!
-    Changes brush shape. 
+	Changes brush shape.
-    This function saves the current brush shape and swith to the default one (single pixel brush) for the filler and the color picker. 
+	This function saves the current brush shape and swith to the default one
-    These functions don't need (and will not work with) a custom brush.
+	(single pixel brush) for the filler and the color picker.
+	These functions don't need (and will not work with) a custom brush.
 */
 void Change_paintbrush_shape(byte shape);
 

engine.c

@@ -79,7 +79,11 @@ char * Menu_tooltip[NB_BUTTONS]=
   "Grad. spheres / ellipses",
   "Brush grab. / Restore   ",
   "Lasso / Restore brush   ",
+#ifdef __ENABLE_LUA__
+  "Brush effects / factory ",
+#else
   "Brush effects           ",
+#endif
   "Drawing modes (effects) ",
   "Text                    ",
   "Magnify mode / Menu     ",

engine.h

@@ -86,7 +86,7 @@ void Window_dropdown_clear_items(T_Dropdown_button * dropdown);
 T_List_button * Window_set_list_button(T_Special_button * entry_button,
 	T_Scroller_button * scroller, Func_draw_list_item draw_list_item);
 void Window_redraw_list(T_List_button * list);
-byte Window_click_in_rectangle(short start_x,short start_y,short end_x,
+byte Window_click_in_rectangle(short start_x, short start_y, short end_x,
 	short end_y);
 short Wait_click_in_palette(T_Palette_button * button);
 void Get_color_behind_window(byte * color, byte * click);

factory.c

@@ -0,0 +1,148 @@
+/*  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 "brush.h"
+#include "buttons.h"
+#include "engine.h"
+#include "global.h"
+#include "misc.h"
+#include "readline.h"
+#include "sdlscreen.h"
+#include "windows.h"
+
+#ifdef __ENABLE_LUA__
+
+#include <lua5.1/lua.h>
+#include <lua5.1/lauxlib.h>
+
+// Wrapper functions to call C from Lua
+int L_PutPixel(lua_State* L)
+{
+	Pixel_in_brush(lua_tonumber(L, 1), lua_tonumber(L, 2), lua_tonumber(L, 3));
+	return 0; // no values returned for lua
+}
+
+int L_GetPixel(lua_State* L)
+{
+	uint8_t c = Read_pixel_from_brush(lua_tonumber(L, 1), lua_tonumber(L, 2));
+	lua_pushinteger(L, c);
+	return 1;
+}
+
+void Button_Brush_Factory(void)
+{
+	short clicked_button;
+	word height;
+	word width;
+	char str[5];
+
+	T_Special_button* width_button;
+	T_Special_button* height_button;
+
+	Open_window(154, 162, "Brush Factory");
+
+	Window_set_normal_button(77, 141, 67, 14, "Cancel", 0, 1, KEY_ESC); // 1
+	Window_set_normal_button(10, 141, 67, 14, "Run", 0, 1, 0); // 2
+	Print_in_window(10, 17, "Width:", MC_Black, MC_Light);
+	width_button = Window_set_input_button(64, 15, 4); // 3
+	Print_in_window(10, 30, "Height:", MC_Black, MC_Light);
+	height_button = Window_set_input_button(64, 28, 4); // 4
+
+	width = Paintbrush_width;
+	Num2str(width, str, 4);
+	Window_input_content(width_button, str);
+
+	height = Paintbrush_height;
+	Num2str(height, str, 4);
+	Window_input_content(height_button, str);
+
+	Update_window_area(0, 0, Window_width, Window_height);
+	Display_cursor();
+
+	do {
+		clicked_button = Window_clicked_button();
+
+		switch (clicked_button)
+		{
+			case 3 : // Largeur
+				Num2str(width, str, 4);
+				Readline(65, 16, str, 4, 1);
+				width = atoi(str);
+				// On corrige les dimensions
+				if (width == 0)
+				{
+					width = 1;
+					Num2str(width, str, 4);
+					Window_input_content(width_button, str);
+				}
+				Display_cursor();
+				break;
+
+			case 4 : // Height
+				Num2str(height, str, 4);
+				Readline(65, 29, str, 4, 1);
+				height = atoi(str);
+				// On corrige les dimensions
+				if (height == 0)
+				{
+					height = 1;
+					Num2str(height, str, 4);
+					Window_input_content(height_button, str);
+				}
+				Display_cursor();
+				break;
+
+			default:
+				break;
+		}
+		
+	} while (clicked_button <= 0 || clicked_button >= 3);
+
+	if (clicked_button == 2) // Run the script
+	{
+		lua_State* L = lua_open();
+
+		Realloc_brush(width, height);
+
+		lua_register(L,"putpixel",L_PutPixel);
+		lua_register(L,"getpixel",L_GetPixel);
+
+		if (luaL_loadfile(L,"./test.lua") != 0)
+			Verbose_error_message(lua_tostring(L, 1));
+
+		lua_pushinteger(L, width);
+		lua_pushinteger(L, height);
+		if (lua_pcall(L, 2, 0, 0) != 0)
+			Verbose_error_message(lua_tostring(L, 1));
+
+		lua_close(L);
+
+		Change_paintbrush_shape(PAINTBRUSH_SHAPE_COLOR_BRUSH);
+	}
+
+	Close_window();
+	Display_cursor();
+}
+
+#endif

factory.h

@@ -0,0 +1 @@
+void Button_Brush_Factory(void);

init.c

@@ -48,26 +48,27 @@
   #include <signal.h>
 #endif
 
+#include "buttons.h"
 #include "const.h"
-#include "struct.h"
+#include "errors.h"
 #include "global.h"
 #include "graph.h"
-#include "buttons.h"
-#include "palette.h"
-#include "help.h"
-#include "operatio.h"
-#include "misc.h"
-#include "errors.h"
-#include "keyboard.h"
-#include "io.h"
-#include "hotkeys.h"
-#include "setup.h"
-#include "windows.h"
-#include "sdlscreen.h"
-#include "mountlist.h" // read_file_system_list
-#include "loadsave.h" // Image_emergency_backup
 #include "init.h"
+#include "io.h"
+#include "factory.h"
+#include "help.h"
+#include "hotkeys.h"
+#include "keyboard.h"
+#include "loadsave.h" // Image_emergency_backup
+#include "misc.h"
+#include "mountlist.h" // read_file_system_list
+#include "operatio.h"
+#include "palette.h"
+#include "sdlscreen.h"
+#include "setup.h"
+#include "struct.h"
 #include "transform.h"
+#include "windows.h"
 
 char Gui_loading_error_message[512];
 
@@ -1058,10 +1059,14 @@ void Init_buttons(void)
                      FAMILY_INTERRUPTION);
 
   Init_button(BUTTON_BRUSH_EFFECTS,
-                     106,18,
+                     106, 18,
-                     16,16,
+                     16, 16,
                      BUTTON_SHAPE_RECTANGLE,
-                     Button_Brush_FX,Button_Brush_FX,
+#ifdef __ENABLE_LUA__
+                     Button_Brush_FX, Button_Brush_Factory,
+#else
+                     Button_Brush_FX, Button_Brush_FX,
+#endif
                      Do_nothing,
                      FAMILY_INSTANT);
 

main.c

@@ -1,4 +1,4 @@
-/*  Grafx1 - The Ultimate 256-color bitmap paint program
+/*  Grafx2 - The Ultimate 256-color bitmap paint program
 
     Copyright 2008 Peter Gordon
     Copyright 2008 Franck Charlet

misc.c

@@ -206,12 +206,12 @@ void Init_chrono(dword delay)
 	return;
 }
 
-void Pixel_in_brush             (word x,word y,byte color)
+void Pixel_in_brush (word x, word y, byte color)
 {
-	*(Brush+y*Brush_width+x)=color;
+	*(Brush + y * Brush_width + x)=color;
 }
 
-byte Read_pixel_from_brush         (word x,word y)
+byte Read_pixel_from_brush (word x, word y)
 {
 	return *(Brush + y * Brush_width + x);
 }

windows.c

@@ -908,7 +908,7 @@ void Warning_message(char * message)
 }
 
 /// Window that shows a big message, and waits for a click on OK
-void Verbose_error_message(char * message)
+void Verbose_error_message(const char * message)
 {
   short clicked_button;
   int line;

windows.h

@@ -70,7 +70,7 @@ void Print_counter(short x,short y,const char * str,byte text_color,byte backgro
 
 byte Confirmation_box(char * message);
 void Warning_message(char * message);
-void Verbose_error_message(char * message);
+void Verbose_error_message(const char * message);
 int Requester_window(char* message, int initial_value);
 
 void Display_image_limits(void);