/*
 ** xpm-read.c for MinilibX in 
 ** 
 ** Made by Charlie Root
 ** Login   <ol@epitech.net>
 ** 
 ** Started on  Tue Dec 11 15:25:27 2001 olivier crouzet
 ** Last update Sat Oct  1 14:56:13 2005 Olivier Crouzet
 */


#include	"mlx_int.h"

extern struct s_col_name mlx_col_name[];


#define	RETURN	{ if (colors) free(colors); if (tab) free(tab); \
		if (colors_direct) free(colors_direct); \
		if (img) {XDestroyImage(img->image); \
				XFreePixmap(xvar->display,img->pix);free(img);} \
		return ((void *)0);}




char	*mlx_int_get_line(char *ptr,int *pos,int size)
{
	int			pos2;
	int			pos3;
	int			pos4;

	if ((pos2 = mlx_int_str_str(ptr+*pos,"\"",size-*pos))==-1)
		return ((char *)0);
	if ((pos3 = mlx_int_str_str(ptr+*pos+pos2+1,"\"",size-*pos-pos2-1))==-1)
		return ((char *)0);
	*(ptr+*pos+pos2) = 0;
	*(ptr+*pos+pos2+1+pos3) = 0;
	pos4 = *pos+pos2+1;
	*pos += pos2+pos3+2;
	return (ptr+pos4);
}


unsigned int	strlcpy_is_not_posix(char *dest, char *src, unsigned int size)
{
	unsigned	count;
	unsigned	i;

	count = 0;
	while (src[count] != '\0')
		++count;
	i = 0;
	while (src[i] != '\0' && i < (size - 1))
	{
		dest[i] = src[i];
		++i;
	}
	dest[i] = '\0';
	return (count);
}

char	*mlx_int_static_line(char **xpm_data,int *pos,int size)
{
	static char	*copy = 0;
	static int	len = 0;
	int			len2;
	char		*str;

	str = xpm_data[(*pos)++];
	if ((len2 = strlen(str))>len)
	{
			if (copy)
					free(copy);
			if (!(copy = malloc(len2+1)))
					return ((char *)0);
			len = len2;
	}
	strlcpy_is_not_posix(copy, str, len2);
	
	return (copy);
}


int	mlx_int_get_col_name(char *str,int size)
{
	int	result;

	result = 0;
	while (size--)
		result = (result<<8)+*(str++);
	
	return (result);
}

int	mlx_int_get_text_rgb(char *name, char *end)
{
	int			i;
	char		buff[64];

	if (*name == '#')
			return (strtol(name+1,0,16));
	if (end)
	{
			snprintf(buff, 64, "%s %s", name, end);
			name = buff;
	}
	i = 0;
	while (mlx_col_name[i].name)
	{
			if (!strcasecmp(mlx_col_name[i].name, name))
					return (mlx_col_name[i].color);
			i ++;
	}
	return (0);
}


int	mlx_int_xpm_set_pixel(t_img *img, char *data, int opp, int col, int x)
{
	int	dec;
	
	dec = opp;
  	while (dec--)
    {
    	if (img->image->byte_order)
			*(data+x*opp+dec) = col&0xFF;
      	else
			*(data+x*opp+opp-dec-1) = col&0xFF;
      	col >>= 8;
    }
}


void	*mlx_int_parse_xpm(t_xvar *xvar,void *info,int info_size,char *(*f)())
{
		int		pos;
		char	*line;
		char	**tab;
		char	*data;
		char	*clip_data;
		int		nc;
		int		opp;
		int		cpp;
		int		col;
		int		rgb_col;
		int		col_name;
		int		method;
		int		x;
		int		i;
		int		j;
		t_img	*img;
		t_xpm_col	*colors;
		int		*colors_direct;
		int		width;
		int		height;
		XImage	*clip_img;
		XGCValues	xgcv;
		Pixmap	clip_pix;

		colors = 0;
		colors_direct = 0;
		img = 0;
		tab = 0;
		pos = 0;
		if (!(line = f(info,&pos,info_size)) ||
						!(tab = mlx_int_str_to_wordtab(line)) || !(width = atoi(tab[0])) ||
						!(height = atoi(tab[1])) || !(nc = atoi(tab[2])) ||
						!(cpp = atoi(tab[3])) )
				RETURN;
		free(tab);
		tab = 0;

		method = 0;
		if (cpp<=2)
		{
				method = 1;
				if (!(colors_direct = malloc((cpp==2?65536:256)*sizeof(int))))
						RETURN;
		}
		else
				if (!(colors = malloc(nc*sizeof(*colors))))
						RETURN;

		clip_data = 0;

		i = nc;
		while (i--)
		{
				if (!(line = f(info,&pos,info_size)) ||
								!(tab = mlx_int_str_to_wordtab(line+cpp)) )
						RETURN;
				j = 0;
				while (tab[j] && strcmp(tab[j++],"c"));

				if (!tab[j])
						RETURN;
				rgb_col = mlx_int_get_text_rgb(tab[j], tab[j+1]);
				/*
				if ((rgb_col = mlx_int_get_text_rgb(tab[j], tab[j+1]))==-1)
				{
						if (!(clip_data = malloc(4*width*height)) ||   ok, nice size ..
										!(clip_img = XCreateImage(xvar->display, xvar->visual,
														1, XYPixmap, 0, clip_data,
														width, height, 8, (width+7)/8)) )
								RETURN;
						memset(clip_data, 0xFF, 4*width*height);
				}
				*/
				if (method)
						colors_direct[mlx_int_get_col_name(line,cpp)] = rgb_col;
								// rgb_col>=0?mlx_get_color_value(xvar, rgb_col):rgb_col;
				else
				{
						colors[i].name = mlx_int_get_col_name(line,cpp);
						colors[i].col = rgb_col; //rgb_col>=0?mlx_get_color_value(xvar,rgb_col):rgb_col;
				}
				free(tab);
		}

		if (!(img = mlx_new_image(xvar,width,height)))
				RETURN;
		opp = img->bpp/8;


		i = height;
		data = img->data;
		while (i--)
		{
				if (!(line = f(info,&pos,info_size)))
						RETURN;
				x = 0;
				while (x<width)
				{
						col = 0;
						col_name = mlx_int_get_col_name(line+cpp*x,cpp);
						if (method)
								col = colors_direct[col_name];
						else
						{
								j = nc;
								while (j--)
										if (colors[j].name==col_name)
										{
												col = colors[j].col;
												j = 0;
										}
						}
						/*
						if (col==-1)
								XPutPixel(clip_img, x, height-1-i, 0);
						else
								mlx_int_xpm_set_pixel(img, data, opp, col, x);
						x ++;
						*/
						if (col==-1)
							col = 0xFF000000;
						mlx_int_xpm_set_pixel(img, data, opp, col, x);
						++x;
				}
				data += img->size_line;
		}
		/*
		if (clip_data)
		{
				if (!(clip_pix = XCreatePixmap(xvar->display, xvar->root,
												width, height, 1)) )
						RETURN;
				img->gc = XCreateGC(xvar->display, clip_pix, 0, &xgcv);
				XPutImage(xvar->display, clip_pix, img->gc, clip_img,
								0, 0, 0, 0, width, height);
				XFreeGC(xvar->display, img->gc);
				xgcv.clip_mask = clip_pix;
				xgcv.function = GXcopy;
				xgcv.plane_mask = AllPlanes;
				img->gc = XCreateGC(xvar->display, xvar->root, GCClipMask|GCFunction|
								GCPlaneMask, &xgcv);
				XSync(xvar->display, False);
				XDestroyImage(clip_img);
		}
		*/
		if (colors)
				free(colors);
		if (colors_direct)
				free(colors_direct);
		return (img);
}


int	mlx_int_file_get_rid_comment(char *ptr, int size)
{
		int	com_begin;
		int	com_end;

		while ((com_begin = mlx_int_str_str_cote(ptr,"/*",size))!=-1)
		{
				com_end = mlx_int_str_str(ptr+com_begin+2,"*/",size-com_begin-2);
				memset(ptr+com_begin,' ',com_end+4);
		}
		while ((com_begin = mlx_int_str_str_cote(ptr,"//",size))!=-1)
		{
				com_end = mlx_int_str_str(ptr+com_begin+2,"\n",size-com_begin-2);
				memset(ptr+com_begin,' ',com_end+3);
		}
}


void	*mlx_xpm_file_to_image(t_xvar *xvar,char *file,int *width,int *height)
{
		int	fd;
		int	size;
		char	*ptr;
		t_img	*img;

		fd = -1;
		if ((fd = open(file,O_RDONLY))==-1 || (size = lseek(fd,0,SEEK_END))==-1 ||
						(ptr = mmap(0,size,PROT_WRITE|PROT_READ,MAP_PRIVATE,fd,0))==
						(void *)MAP_FAILED)
		{
				if (fd>=0)
						close(fd);
				return ((void *)0);
		}
		mlx_int_file_get_rid_comment(ptr, size);
		if (img = mlx_int_parse_xpm(xvar,ptr,size,mlx_int_get_line))
		{
				*width = img->width;
				*height = img->height;
		}
		munmap(ptr,size);
		close(fd);
		return (img);
}

void	*mlx_xpm_to_image(t_xvar *xvar,char **xpm_data,int *width,int *height)
{
		t_img	*img;

		if (img = mlx_int_parse_xpm(xvar,xpm_data,0,mlx_int_static_line))
		{
				*width = img->width;
				*height = img->height;
		}
		return (img);
}