/*
==============================================================================
|  GLF Library
|  Version 1.4
| 
|  Author: Roman Podobedov
|  Email: romka@ut.ee
|  WEB: http://romka.demonews.com
|  Release Date: 18 May 2001
|  
|  Copyright (C) 2000-2001, Romka Graphics
|  This library is freely distributable without any license or permissions
|  for non-commercial usage. You can use this library in any non-commercial
|  program. In each program, where You use this library You should keep 
|  this header (author name and coordinates)!
|  For commercial usage, please contact me: romka@ut.ee
==============================================================================
*/

#if defined (WIN32)
#include <windows.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include "glf.h"

/* ---------- Definitions and structures ----- */

#define MAX_FONTS 256

/* Color structure */
struct color
{
	float r, g, b, a;
};

/* One symbol of font */
struct one_symbol
{
	unsigned char vertexs; /* Number of vertexs         */
	unsigned char facets;  /* Number of facets          */
	unsigned char lines;   /* Number of lines in symbol */

	float *vdata;          /* Pointer to Vertex data    */
	unsigned char *fdata;  /* Pointer to Facets data    */
	unsigned char *ldata;  /* Pointer to Line data      */

	float leftx;           /* Smaller x coordinate      */
	float rightx;          /* Right x coordinate        */
	float topy;            /* Top y coordinate          */
	float bottomy;         /* Bottom y coordinate       */
};

/* Font structure */
struct glf_font
{
	char font_name [97];
	unsigned char sym_total;          /* Total symbols in font */
	struct one_symbol *symbols[256];  /* Pointers to symbols   */
};

/* ------------- Main variables -------------- */

static float SymbolDist = 0.2f;  /* Distance between symbols (Variable constant) */
static float SymbolDepth = 0.2f; /* Symbol Depth in 3D space (Variable constant) */
static float SpaceSize = 2.0f;   /* Space size (Variable constant)               */
static float RotateAngle = 0.0f; /* Rotate angle for string (vector font) */
static float RotateAngleB = 0.0f; /* Rotate angle for string (bitmap font) */

/* Array of font pointers, up to MAX_FONTS fonts can be loaded at once */
/* if (fonts[i] == NULL) then this font is not present in memory */

static struct	glf_font *fonts[MAX_FONTS];
static int		curfont;			/* Index of current font pointer */
static char		ap = GLF_CENTER;	/* Anchor point */
static GLboolean m_string_center;	/* String centering (vector fonts) */
static GLboolean m_bitmap_string_center;	/* String centering (bitmap fonts) */

static GLuint	m_direction;	/* String direction (vector fonts) */

static char		console_msg = GLF_NO;
static char		texturing = GLF_NO;
static char		contouring = GLF_NO;
static struct	color contouring_color;

/* Console mode variables */
static int	conWidth, conHeight;	/* Console width and height */
static int	conx = 0, cony = 0;		/* Console current X and Y */
static char	*conData;				/* Console data */
static int	conFont;				/* Console font */
static char	conCursor = GLF_NO;		/* Console cursor Enabled|Disabled */
static int	conCursorBlink;         /* Console cursor blink rate */
static int	conCursorCount;         /* Console cursor blink counter */
static char	conCursorMode = GLF_NO; /* Console Cursor mode (on/off screen) */

/* ----------- Variables for bitmap font ------------- */
#define SEEK_SET_POS 4195

struct coord_rect
{
	float x, y, width, height;
};

struct widths
{
	float *width;
};

/* Constants */
static float sym_space=0.001f;

/* One font variables */
static struct coord_rect Symbols[256];
static GLboolean bmf_texturing;
static int    bmf_curfont;
static GLuint bmf_texture[MAX_FONTS]; /* All fonts */
static GLuint bmf_mask[MAX_FONTS]; /* All fonts (masked) */
static char	  bmf_in_use[MAX_FONTS]; /* 1 - if font is used, 0 - otherwise */
static int	  list_base[MAX_FONTS];
static GLfloat m_max_height[MAX_FONTS]; /* Maximal height of each font */
static struct widths m_widths[MAX_FONTS]; /* Width of each symbols in each font */


/* Initialization of GLF library, should be called before use of library */
void glfInit()
{
	int i;

	for (i=0; i<MAX_FONTS; i++)
	{
		fonts[i] = NULL;
		bmf_in_use[i] = 0;
		m_max_height[i] = 0;
	}
	
	curfont = -1;
	bmf_curfont = -1;
	console_msg = GLF_NO;
	ap = GLF_CENTER;		/* Set anchor point to center of each symbol */
	texturing = GLF_NO;		/* By default texturing is NOT Enabled */
	contouring = GLF_NO;	/* By default contouring is NOT Enabled */
	memset(&contouring_color, 0, sizeof(struct color));
	conData = NULL;
	glfSetConsoleParam(40, 20);
	glfConsoleClear();
	glfEnable(GLF_CONSOLE_CURSOR);
	glfSetCursorBlinkRate(10);
	glfStringCentering(GL_TRUE);
	glfBitmapStringCentering(GL_FALSE);
	glfStringDirection(GLF_LEFT);
}

/* Closing library usage */
void glfClose()
{
	int i;
	
	free(conData);

	for (i=0; i<MAX_FONTS; i++) glfUnloadFontD(i);
	for (i=0; i<MAX_FONTS; i++) glfUnloadBMFFontD(i);
}

/* 
|	This function check that this machine is little endian
|	Return value:	1 - little endian
|					0 - big endian
*/
static int LittleEndian()
{
	int endianTester = 1;
	char *endianChar = 0;

	endianChar = (char *)&endianTester;
	if (*endianChar) return 1;
	return 0;
}


/*
   --------------------------------------------------------------------------------- 
   ------------------------ Work with vector fonts --------------------------------- 
   --------------------------------------------------------------------------------- 
*/

/* 
|	This function read font file and store information in memory
|	Return: GLF_OK - if all OK
|	Return: GLF_ERROR - if any error 
*/
static int ReadFont(char *font_name, struct glf_font *glff)
{

	FILE *fontf;
	char buffer[64];
	int i, j;
	unsigned char temp, code, verts, fcets, lns;
	float tempfx, tempfy;
	unsigned char *tp;
	int LEndian; /* True if little endian machine */

	fontf = fopen(font_name, "rb");
	if (fontf == NULL) return GLF_ERROR;

	fread(buffer, 3, 1, fontf);
	buffer[3] = 0;
	if (strcmp(buffer, "GLF"))
	{
		/* If header is not "GLF" */
		if (console_msg) printf("Error reading font file: incorrect file format\n");
		return GLF_ERROR;
	}

	/* Check for machine type */
	LEndian = LittleEndian();

	fread(glff->font_name, 96, 1, fontf);
	glff->font_name[96] = 0;

	fread(&glff->sym_total, 1, 1, fontf); /* Read total symbols in font */

	for (i=0; i<MAX_FONTS; i++) glff->symbols[i] = NULL;

	for (i=0; i<28; i++) fread(&temp, 1, 1, fontf);  /* Read unused data */

	/* Now start to read font data */
  
	for (i=0; i<glff->sym_total; i++)
	{
		fread(&code, 1, 1, fontf);  /* Read symbol code   */
		fread(&verts, 1, 1, fontf); /* Read vertexs count */
		fread(&fcets, 1, 1, fontf); /* Read facets count  */
		fread(&lns, 1, 1, fontf);   /* Read lines count   */

		if (glff->symbols[code] != NULL) 
		{
			if (console_msg) printf("Error reading font file: encountered symbols in font\n");
			return GLF_ERROR;
		}

		glff->symbols[code] = (struct one_symbol *)malloc(sizeof(struct one_symbol));
		glff->symbols[code]->vdata = (float *)malloc(8*verts);
		glff->symbols[code]->fdata = (unsigned char *)malloc(3*fcets);
		glff->symbols[code]->ldata = (unsigned char *)malloc(lns);

		glff->symbols[code]->vertexs = verts;
		glff->symbols[code]->facets = fcets;
		glff->symbols[code]->lines = lns;

		/* Read vertexs data */
		glff->symbols[code]->leftx = 10;
		glff->symbols[code]->rightx = -10;
		glff->symbols[code]->topy = 10;
		glff->symbols[code]->bottomy = -10;

		for (j=0; j<verts; j++)
		{
			fread(&tempfx, 4, 1, fontf);
			fread(&tempfy, 4, 1, fontf);
          
			/* If machine is bigendian -> swap low and high words in
			tempfx and tempfy */
			if (!LEndian) 
			{
				tp = (unsigned char *)&tempfx;
				temp = tp[0]; tp[0] = tp[3]; tp[3] = temp;
				temp = tp[1]; tp[1] = tp[2]; tp[2] = temp;
				tp = (unsigned char *)&tempfy;
				temp = tp[0]; tp[0] = tp[3]; tp[3] = temp;
				temp = tp[1]; tp[1] = tp[2]; tp[2] = temp;
			}
			glff->symbols[code]->vdata[j*2] = tempfx;
			glff->symbols[code]->vdata[j*2+1] = tempfy;

			if (tempfx < glff->symbols[code]->leftx) glff->symbols[code]->leftx = tempfx;
			if (tempfx > glff->symbols[code]->rightx) glff->symbols[code]->rightx = tempfx;
			if (tempfy < glff->symbols[code]->topy) glff->symbols[code]->topy = tempfy;
			if (tempfy > glff->symbols[code]->bottomy) glff->symbols[code]->bottomy = tempfy;
		}
		for (j=0; j<fcets; j++)
			fread(&glff->symbols[code]->fdata[j*3], 3, 1, fontf);
		for (j=0; j<lns; j++)
			fread(&glff->symbols[code]->ldata[j], 1, 1, fontf);
	}
	fclose(fontf);
	return GLF_OK;
}


/* 
| Function loads font to memory from file
| Return value: GLF_ERROR  - if error
|               >=0 - returned font descriptor (load success)
*/
int glfLoadFont(char *font_name)
{
	int i;
	char flag; /* Temporary flag */

	/* First we find free font descriptor */
	flag = 0; /* Descriptor not found yet */
	for (i=0; i<MAX_FONTS; i++)
		if (fonts[i] == NULL)
		{
			/* Initialize this font */
			fonts[i] = (struct glf_font *)malloc(sizeof(struct glf_font));
			flag = 1;
			break;
		}

	if (!flag) return GLF_ERROR; /* Free font not found */
	if (ReadFont(font_name, fonts[i]) == GLF_OK) 
	{
		curfont = i; /* Set curfont to just loaded font */
		return i;
	}
  
	if (fonts[i] != NULL)
	{
		free(fonts[i]);
		fonts[i] = NULL;
	}
	return GLF_ERROR;
}

/* 
| Unload current font from memory
| Return value: GLF_OK  - if all OK
|               GLF_ERROR -  if error
*/
int glfUnloadFont()
{
	int i;
  
	if ((curfont<0) || (fonts[curfont] == NULL)) return GLF_ERROR;
  
	for (i=0; i<256; i++)
	{
		if (fonts[curfont]->symbols[i] != NULL)
		{
			free(fonts[curfont]->symbols[i]->vdata);
			free(fonts[curfont]->symbols[i]->fdata);
			free(fonts[curfont]->symbols[i]->ldata);
			free(fonts[curfont]->symbols[i]);
		}
	}

	free(fonts[curfont]);
	fonts[curfont] = NULL;
	curfont = -1;
	return GLF_OK;
}

/* Unload font by font descriptor */
int glfUnloadFontD(int font_descriptor)
{
	int temp;

	if ((font_descriptor < 0) || (fonts[font_descriptor] == NULL)) return GLF_ERROR;

	temp = curfont;
	curfont = font_descriptor;
	glfUnloadFont();
	if (temp != font_descriptor) curfont = temp;
	else curfont = -1;
	return GLF_OK;
}

void glfDrawWiredSymbol(char s)
{
	int i, cur_line;
	float *tvp; /* temporary vertex pointer */
	float x, y;
  
	if ((curfont < 0) || (fonts[curfont] == NULL)) return;
	if (fonts[curfont]->symbols[s] == NULL) return;

	glBegin(GL_LINE_LOOP);
	tvp = fonts[curfont]->symbols[s]->vdata;
	cur_line = 0;
	for (i=0; i<fonts[curfont]->symbols[s]->vertexs; i++)
	{
		x = *tvp++;
		y = *tvp++;
		glVertex2f(x, y);
		if (fonts[curfont]->symbols[s]->ldata[cur_line] == i)
		{
			glEnd();
			cur_line++;
			if (cur_line < fonts[curfont]->symbols[s]->lines) glBegin(GL_LINE_LOOP);
			else break; /* No more lines */
		}
	}
}

/* Draw wired symbol by font_descriptor */
void glfDrawWiredSymbolF(int font_descriptor, char s)
{
	int temp;

	temp = curfont;
	curfont = font_descriptor;
	glfDrawWiredSymbol(s);
	curfont = temp;
}

static void DrawString(char *s, void (*funct) (char s))
{
	int i;
	float sda, sdb;
	float distance;

	if (!s) return;
	if (!*s) return;
	if (curfont == -1) return;

	/* Calculate correction (if string centering enabled) */
	if (m_string_center)
	{
		distance = 0;
		for (i=0; i<(int)strlen(s); i++)
		{
			if ((fonts[curfont]->symbols[s[i]] == NULL) || (s[i] == ' ')) 
			{
				if (m_direction == GLF_LEFT || m_direction == GLF_UP) distance += SpaceSize;
				else distance -= SpaceSize;
			}
			else
				if (i < ((int)strlen(s)-1))
					if (s[i+1] == ' ') 
					{
						if (m_direction == GLF_LEFT || m_direction == GLF_UP) distance += SymbolDist;
						else distance -= SymbolDist;
					}
					else
					{
						if (fonts[curfont]->symbols[s[i+1]] == NULL) continue;
	
						if (m_direction == GLF_LEFT || m_direction == GLF_RIGHT)
						{
							sda = (float)fabs(fonts[curfont]->symbols[s[i]]->rightx);
							sdb = (float)fabs(fonts[curfont]->symbols[s[i+1]]->leftx);
							if (m_direction == GLF_LEFT) distance += sda+sdb+SymbolDist;
							else distance -= sda+sdb+SymbolDist;
						}
						else
						{
							sda = (float)fabs(fonts[curfont]->symbols[s[i]]->topy);
							sdb = (float)fabs(fonts[curfont]->symbols[s[i]]->bottomy);
							if (m_direction == GLF_DOWN) distance -= sda+sdb+SymbolDist;
							else distance += sda+sdb+SymbolDist;
						}
					}
		}
	}

	glPushMatrix();
	
	/* Rotate if needed */
	if (RotateAngle != 0.0f) glRotatef(RotateAngle, 0, 0, 1);

	/* Correct string position */
	if (m_string_center)
	{
		switch (m_direction)
		{
			case GLF_LEFT : glTranslatef(-distance/2, 0, 0); break;
			case GLF_RIGHT : glTranslatef(distance/2, 0, 0); break;
			case GLF_UP : glTranslatef(0, distance/2, 0); break;
			case GLF_DOWN : glTranslatef(0, -distance/2, 0); break;
		}
	}
	else if (s[0] != ' ')
	{
		switch (m_direction)
		{
			case GLF_LEFT : glTranslatef(-(1-(float)fabs(fonts[curfont]->symbols[s[0]]->leftx)), 0, 0); break;
			case GLF_RIGHT : glTranslatef((1-(float)fabs(fonts[curfont]->symbols[s[0]]->rightx)), 0, 0); break;
			case GLF_UP : glTranslatef(0, (1-(float)fabs(fonts[curfont]->symbols[s[0]]->topy)), 0); break;
			case GLF_DOWN : glTranslatef(0, -(1-(float)fabs(fonts[curfont]->symbols[s[0]]->bottomy)), 0); break;
		}
	}

	/* Start to draw our string */
	for (i=0; i<(int)strlen(s); i++)
	{
		if (s[i] != ' ') (*funct) (s[i]);
		if ((fonts[curfont]->symbols[s[i]] == NULL) || (s[i] == ' '))
		{
			switch (m_direction)
			{
				case GLF_LEFT : glTranslatef(SpaceSize, 0, 0); break;
				case GLF_RIGHT : glTranslatef(-SpaceSize, 0, 0); break;
				case GLF_UP : glTranslatef(0, SpaceSize, 0); break;
				case GLF_DOWN : glTranslatef(0, -SpaceSize, 0); break;
			}
		}
		else
			if (i < ((int)strlen(s)-1))		
				if (s[i+1] == ' ') 
				{
					switch (m_direction)
					{
						case GLF_LEFT : glTranslatef(SymbolDist, 0, 0); break;
						case GLF_RIGHT : glTranslatef(-SymbolDist, 0, 0); break;
						case GLF_UP : glTranslatef(0, SymbolDist, 0); break;
						case GLF_DOWN : glTranslatef(0, -SymbolDist, 0); break;
					}
				}
				else
				{
					if (fonts[curfont]->symbols[s[i+1]] == NULL) continue;
					
					if (m_direction == GLF_LEFT || m_direction == GLF_RIGHT)
					{
						if (m_direction == GLF_LEFT)
						{
							sda = (float)fabs(fonts[curfont]->symbols[s[i]]->rightx);
							sdb = (float)fabs(fonts[curfont]->symbols[s[i+1]]->leftx);
						}
						else
						{
							sda = (float)fabs(fonts[curfont]->symbols[s[i+1]]->rightx);
							sdb = (float)fabs(fonts[curfont]->symbols[s[i]]->leftx);
						}
					
						if (m_direction == GLF_LEFT) glTranslatef(sda+sdb+SymbolDist, 0, 0);
						else glTranslatef(-(sda+sdb+SymbolDist), 0, 0);
					}
					else
					{
						if (m_direction == GLF_DOWN) 
						{
							sda = (float)fabs(fonts[curfont]->symbols[s[i]]->topy);
							sdb = (float)fabs(fonts[curfont]->symbols[s[i+1]]->bottomy);
						}
						else
						{
							sda = (float)fabs(fonts[curfont]->symbols[s[i+1]]->topy);
							sdb = (float)fabs(fonts[curfont]->symbols[s[i]]->bottomy);		
						}
						
						if (m_direction == GLF_DOWN) glTranslatef(0, -(sda+sdb+SymbolDist), 0);
						else glTranslatef(0, sda+sdb+SymbolDist, 0);
					}
					
				}
	}
	glPopMatrix();
}

void glfDrawWiredString(char *s)
{
	DrawString(s, &glfDrawWiredSymbol);
}

/* Draw wired string by font_descriptor */
void glfDrawWiredStringF(int font_descriptor, char *s)
{
	int temp;

	temp = curfont;
	curfont = font_descriptor;
	DrawString(s, &glfDrawWiredSymbol);
	curfont = temp;
}

void glfDrawSolidSymbol(char s)
{
	unsigned char *b; /* Face pointer   */
	float *vp;        /* Vertex pointer */
	int i, j;
	float x, y;
	float temp_color[4];

	if ((curfont<0) || (fonts[curfont] == NULL)) return;
  
	if (fonts[curfont]->symbols[s] == NULL) return;

	b = fonts[curfont]->symbols[s]->fdata;
	vp = fonts[curfont]->symbols[s]->vdata;

	glBegin(GL_TRIANGLES);   
	for (i=0; i<fonts[curfont]->symbols[s]->facets; i++)
	{
		for (j=0; j<3; j++)
		{
			x = vp[*b*2];
			y = vp[*b*2+1];
			if (texturing == GLF_YES) glTexCoord2f((x+1)/2, (y+1)/2);
			glVertex2f(x, y);
			b++;
		}
	}
	glEnd();

	/* Draw contour, if enabled */
	if (contouring == GLF_YES) 
	{
		glGetFloatv(GL_CURRENT_COLOR, temp_color);
		glColor4f(contouring_color.r, contouring_color.g, contouring_color.b, contouring_color.a);
		glfDrawWiredSymbol(s);
		glColor4fv(temp_color);
	}
}

/* Draw solid symbol by font_descriptor */
void glfDrawSolidSymbolF(int font_descriptor, char s)
{
	int temp;

	temp = curfont;
	curfont = font_descriptor;
	glfDrawSolidSymbol(s);
	curfont = temp;
}

void glfDrawSolidString(char *s)
{
	DrawString(s, &glfDrawSolidSymbol);
}

/* Draw solid string by font_descriptor */
void glfDrawSolidStringF(int font_descriptor, char *s)
{
	int temp;

	temp = curfont;
	curfont = font_descriptor;
	DrawString(s, &glfDrawSolidSymbol);
	curfont = temp;
}


/* ------------ 3D Wired text drawing ---------------------- */

void glfDraw3DWiredSymbol(char s)
{
	int i, cur_line;
	float *tvp; /* temp vertex pointer */
	float x, y;
  
	if ((curfont<0) || (fonts[curfont] == NULL)) return;
	if (fonts[curfont]->symbols[(int)s] == NULL) return;

	/* Draw front symbol */
	glBegin(GL_LINE_LOOP);
	tvp = fonts[curfont]->symbols[s]->vdata;
	cur_line = 0;
	for (i=0; i<fonts[curfont]->symbols[s]->vertexs; i++)
	{
		x = *tvp;
		tvp++;
		y = *tvp;
		tvp++;
		glVertex3f(x, y, 1);
		if (fonts[curfont]->symbols[s]->ldata[cur_line] == i)
		{
			glEnd();
			cur_line++;
			if (cur_line < fonts[curfont]->symbols[s]->lines) glBegin(GL_LINE_LOOP);
			else break; /* No more lines */
		}
	}

	/* Draw back symbol */
	glBegin(GL_LINE_LOOP);
	tvp = fonts[curfont]->symbols[s]->vdata;
	cur_line = 0;
	for (i=0; i<fonts[curfont]->symbols[s]->vertexs; i++)
	{
		x = *tvp;
	    tvp++;
		y = *tvp;
		tvp++;
		glVertex3f(x, y, 1+SymbolDepth);
		if (fonts[curfont]->symbols[s]->ldata[cur_line] == i)
		{
			glEnd();
			cur_line++;
			if (cur_line < fonts[curfont]->symbols[s]->lines) glBegin(GL_LINE_LOOP);
			else break; /* No more lines */
		}
	}

	/* Draw lines between back and front symbols */
	glBegin(GL_LINES);
	tvp = fonts[curfont]->symbols[s]->vdata;
	for (i=0; i<fonts[curfont]->symbols[s]->vertexs; i++)
	{
		x = *tvp;
		tvp++;
		y = *tvp;
		tvp++;
		glVertex3f(x, y, 1);
		glVertex3f(x, y, 1+SymbolDepth);
	}
	glEnd();
}

/* Draw 3D wired symbol by font_descriptor */
void glfDraw3DWiredSymbolF(int font_descriptor, char s)
{
	int temp;

	temp = curfont;
	curfont = font_descriptor;
	glfDraw3DWiredSymbol(s);
	curfont = temp;
}

void glfDraw3DWiredString(char *s)
{
	DrawString(s, &glfDraw3DWiredSymbol);
}

/* Draw 3D wired string by font_descriptor */
void glfDraw3DWiredStringF(int font_descriptor, char *s)
{
	int temp;

	temp = curfont;
	curfont = font_descriptor;
	DrawString(s, &glfDraw3DWiredSymbol);
	curfont = temp;
}

/* ------------ 3D Solid text drawing ---------------------- */

void glfDraw3DSolidSymbol(char s)
{
	int i, j, cur_line, flag;
	float x, y, bx, by;
	unsigned char *b; /* Face pointer   */
	float *vp;        /* Vertex pointer */
	float *tvp;       /* temp vertex pointer */
	float temp_color[4];
	GLboolean light_temp;
  
	if ((curfont<0) || (fonts[curfont] == NULL)) return;
	if (fonts[curfont]->symbols[(int)s] == NULL) return;

	b = fonts[curfont]->symbols[s]->fdata;
	vp = fonts[curfont]->symbols[s]->vdata;

	glBegin(GL_TRIANGLES);   
	glNormal3f(0, 0, 1);
	for (i=0; i<fonts[curfont]->symbols[s]->facets; i++)
	{
		b += 2;
		for (j=0; j<3; j++)
		{
			x = vp[*b*2];
			y = vp[*b*2+1];
			glVertex3f(x, y, 1+SymbolDepth);
			b--;
		}
		b += 4;
	}
	glEnd();

	b = fonts[curfont]->symbols[s]->fdata;
	vp = fonts[curfont]->symbols[s]->vdata;
  
	glBegin(GL_TRIANGLES);   
	glNormal3f(0, 0, -1);
	for (i=0; i<fonts[curfont]->symbols[s]->facets; i++)
	{
		for (j=0; j<3; j++)
		{
			x = vp[*b*2];
			y = vp[*b*2+1];
			glVertex3f(x, y, 1);
			b++;
		}
	}
	glEnd();

	flag = 0;
	glBegin(GL_QUAD_STRIP);
	tvp = fonts[curfont]->symbols[s]->vdata;
	cur_line = 0;
	for (i=0; i<fonts[curfont]->symbols[s]->vertexs; i++)
	{
		x = *tvp;
		tvp++;
		y = *tvp;
		tvp++;
		if (!flag) 
		{
			bx = x;
			by = y;
			flag = 1;
		}
		glNormal3f(x, y, 0);
		glVertex3f(x, y, 1);
		glVertex3f(x, y, 1+SymbolDepth);
		if (fonts[curfont]->symbols[s]->ldata[cur_line] == i)
		{
			glVertex3f(bx, by, 1);
			glVertex3f(bx, by, 1+SymbolDepth);
			flag = 0;
			glEnd();
			cur_line++;
			if (cur_line < fonts[curfont]->symbols[s]->lines) glBegin(GL_QUAD_STRIP);
			else break; /* No more lines */
		}
	}

	/* Draw contour, if enabled */
	if (contouring == GLF_YES) 
	{
		glGetBooleanv(GL_LIGHTING, &light_temp);
		glDisable(GL_LIGHTING);
		glGetFloatv(GL_CURRENT_COLOR, temp_color);
		glColor4f(contouring_color.r, contouring_color.g, contouring_color.b, contouring_color.a);
		glfDraw3DWiredSymbol(s);
		glColor4fv(temp_color);
		if (light_temp) glEnable(GL_LIGHTING);
	}
}

/* Draw 3D solid symbol by font_descriptor */
void glfDraw3DSolidSymbolF(int font_descriptor, char s)
{
	int temp;

	temp = curfont;
	curfont = font_descriptor;
	glfDraw3DSolidSymbol(s);
	curfont = temp;
}

void glfDraw3DSolidString(char *s)
{
	DrawString(s, &glfDraw3DSolidSymbol);
}

/* Draw 3D solid string by font_descriptor */
void glfDraw3DSolidStringF(int font_descriptor, char *s)
{
	int temp;

	temp = curfont;
	curfont = font_descriptor;
	DrawString(s, &glfDraw3DSolidSymbol);
	curfont = temp;
}

/* Get the size a string will have on screen */
void glfGetStringBoundsF(int fd, char *s, float *minx, float *miny, float *maxx, float *maxy)
{
	struct glf_font *font;
	int i;
	float sda, sdb, cw = 0, minxx = 10;
	float top = 10, bottom = -10;

	if (fd < 0 || fd > (MAX_FONTS-1)) return;
	font = fonts[fd];

	if (font == NULL) return;

	if (font->symbols[s[0]])
		minxx = font->symbols[s[0]]->leftx;
	else
		minxx = 0.0;

	for (i=0; i<(int)strlen(s); i++)
	{
		if ((font->symbols[s[i]] == NULL) || (s[i] == ' '))
			cw += SpaceSize;
		else
		{
			sdb = -font->symbols[(int)s[i]]->leftx;
			sda = font->symbols[(int)s[i]]->rightx;

			cw += sda+sdb+SymbolDist;

			/* Update top/bottom bounds */
			if (font->symbols[(int)s[i]]->bottomy > bottom)
				bottom = font->symbols[(int)s[i]]->bottomy;

			if (font->symbols[(int)s[i]]->topy < top)
				top = font->symbols[(int)s[i]]->topy;
		}
	}

	cw += minxx;

	if ((maxx) && (maxy))
	{
		*maxx = cw;
		*maxy = bottom;
	}

	if ((minx) && (miny))
	{
		*minx = minxx;
		*miny = top;
	}
}

void glfGetStringBounds(char *s, float *minx, float *miny, float *maxx, float *maxy)
{
	glfGetStringBoundsF(curfont, s, minx, miny, maxx, maxy);
}

void glfSetSymbolSpace(float sp)
{
	SymbolDist = sp;
}

float glfGetSymbolSpace()
{
	return SymbolDist;
}

void glfSetSpaceSize(float sp)
{
	SpaceSize = sp;
}

float glfGetSpaceSize()
{
	return SpaceSize;
}

void glfSetSymbolDepth(float dpth)
{
	SymbolDepth = dpth;
}

float glfGetSymbolDepth()
{
	return SymbolDepth;
}

int glfSetCurrentFont(int Font_Descriptor)
{
	if ((Font_Descriptor < 0) || (fonts[Font_Descriptor] == NULL)) return GLF_ERROR;
  
	curfont = Font_Descriptor;
	return GLF_OK;
}

int glfGetCurrentFont()
{
	return curfont;
}

void glfSetAnchorPoint(int anchp)
{
	if ((anchp >= GLF_LEFT_UP) && (anchp <= GLF_RIGHT_DOWN))
		ap = anchp;
}

void glfSetContourColor(float r, float g, float b, float a)
{
	contouring_color.r = r;
	contouring_color.g = g;
	contouring_color.b = b;
	contouring_color.a = a;
}

void glfEnable(int what)
{
	switch (what) 
	{
		case GLF_CONSOLE_MESSAGES: console_msg = GLF_YES; break;
		case GLF_TEXTURING: texturing = GLF_YES; break;
		case GLF_CONSOLE_CURSOR: conCursor = GLF_YES; break;
		case GLF_CONTOURING: contouring = GLF_YES; break;
	}
}

void glfDisable(int what)
{
	switch (what) 
	{
		case GLF_CONSOLE_MESSAGES: console_msg = GLF_NO; break;
		case GLF_TEXTURING: texturing = GLF_NO; break;
		case GLF_CONSOLE_CURSOR: conCursor = GLF_NO; break;
		case GLF_CONTOURING: contouring = GLF_NO; break;
	}
}

/* ---------------- Console functions ---------------------- */

void glfSetConsoleParam(int width, int height)
{
	if (conData) free(conData);

	conWidth = width;
	conHeight = height;
	conData = (char *)malloc(width*height);
	glfConsoleClear();
}

int glfSetConsoleFont(int Font_Descriptor)
{
	if ((Font_Descriptor < 0) || (fonts[Font_Descriptor] == NULL)) return GLF_ERROR;
  
	conFont = Font_Descriptor;
	return GLF_OK;
}

void glfConsoleClear()
{
	memset(conData, 0, conWidth*conHeight);
	conx = 0;
	cony = 0;
}

void glfPrint(char *s, int lenght)
{
	int i;

	for (i=0; i<lenght; i++)
	{
		if (s[i] > 31)
		{
			conData[cony*conWidth+conx] = s[i];
			conx++;
		} else
		if (s[i] == '\n') conx = conWidth;
		if (conx >= conWidth)
		{
			conx = 0;
			cony++;
			if (cony >= conHeight)
			{
				/* Shift all console contents up */
				memcpy(conData, &conData[conWidth], conWidth*(conHeight-1));
				/* Fill bottom line by spaces */
				memset(&conData[conWidth*(conHeight-1)], 0, conWidth);
				cony = conHeight-1;
			}
		}
	}
}

void glfPrintString(char *s)
{
	glfPrint(s, strlen(s));
}

void glfPrintChar(char s)
{
	glfPrint(&s, 1);
}

void glfConsoleDraw()
{
	int i, j;
	char s[512];

	for (i=0; i<conHeight; i++)
	{
		memcpy(s, &conData[i*conWidth], conWidth);
		s[conWidth] = 0;
		if ((conCursor == GLF_YES) && (i == cony))
		{
			conCursorCount--;
			if (conCursorCount < 0)
			{
				conCursorCount = conCursorBlink;
				if (conCursorMode == GLF_YES) conCursorMode = GLF_NO;
				else conCursorMode = GLF_YES;
			}

			if (conCursorMode == GLF_YES)
			for (j=0; j<conWidth; j++)
			{
				if (!s[j])
				{
					s[j] = '_'; /* Draw cursor */
					s[j+1] = 0;
					break;
				}
			}
		}
		glfDrawSolidStringF(conFont, s);
		glTranslatef(0, -2, 0);
	}
}

void glfSetCursorBlinkRate(int Rate)
{
	if (Rate > 0)
	{
		conCursorBlink = Rate;
		conCursorCount = Rate;
		conCursorMode = GLF_YES;
	}
}

/* Set string centering for vector fonts */
void glfStringCentering(GLboolean center)
{
	m_string_center = center;
}

/* String direction for vector font (GLF_LEFT, GLF_RIGHT, GLF_UP, GLF_DOWN) */
/* GLF_LEFT by default */
void glfStringDirection(GLuint direction)
{
	if (direction == GLF_LEFT || direction == GLF_RIGHT || 
		direction == GLF_UP || direction == GLF_DOWN) m_direction = direction;
}

/* Get current text direction */
GLuint glfGetStringDirection()
{
	return m_direction;
}


/* Get string centering for vector fonts */
GLboolean glfGetStringCentering()
{
	return m_string_center;
}

/* Set rotate angle for vector fonts */
void glfSetRotateAngle(float angle)
{
	RotateAngle = angle;
}


/*
   --------------------------------------------------------------------------------- 
   ------------------------ Work with bitmapped fonts ------------------------------ 
   --------------------------------------------------------------------------------- 
*/


/* Some color conversions */
static void bwtorgba(unsigned char *b,unsigned char *l,int n)
{
    while (n--)
    {
		l[0] = *b; l[1] = *b;
		l[2] = *b; l[3] = 0xff;
		l += 4; b++;
    }
}

static void latorgba(unsigned char *b, unsigned char *a,unsigned char *l,int n)
{
	while(n--)
	{
		l[0] = *b; l[1] = *b;
		l[2] = *b; l[3] = *a;
		l += 4; b++; a++;
    }
}

static void rgbtorgba(unsigned char *r,unsigned char *g,unsigned char *b,unsigned char *l,int n)
{
    while(n--)
	{
		l[0] = r[0]; l[1] = g[0];
		l[2] = b[0]; l[3] = 0xff;
		l += 4; r++; g++; b++;
    }
}

static void rgbatorgba(unsigned char *r,unsigned char *g,unsigned char *b,unsigned char *a,unsigned char *l,int n)
{
    while(n--)
	{
		l[0] = r[0]; l[1] = g[0];
		l[2] = b[0]; l[3] = a[0];
		l += 4; r++; g++; b++; a++;
    }
}

typedef struct _ImageRec
{
    unsigned short imagic;
    unsigned short type;
    unsigned short dim;
    unsigned short xsize, ysize, zsize;
    unsigned int min, max;
    unsigned int wasteBytes;
    char name[80];
    unsigned long colorMap;
    FILE *file;
    unsigned char *tmp, *tmpR, *tmpG, *tmpB;
    unsigned long rleEnd;
    unsigned int *rowStart;
    int *rowSize;
} ImageRec;

static void ConvertShort(unsigned short *array, long length)
{
    unsigned b1, b2;
    unsigned char *ptr;

    ptr = (unsigned char *)array;
    while (length--) {
	b1 = *ptr++;
	b2 = *ptr++;
	*array++ = (b1 << 8) | (b2);
    }
}

static void ConvertLong(unsigned *array, long length)
{
    unsigned b1, b2, b3, b4;
    unsigned char *ptr;

    ptr = (unsigned char *)array;
    while (length--)
	{
		b1 = *ptr++;
		b2 = *ptr++;
		b3 = *ptr++;
		b4 = *ptr++;
		*array++ = (b1 << 24) | (b2 << 16) | (b3 << 8) | (b4);
    }
}

/* Open RGB Image */
static ImageRec *ImageOpen(FILE *f)
{
    union
	{
		int testWord;
		char testByte[4];
    } endianTest;

    ImageRec *image;
    int swapFlag;
    int x;

    endianTest.testWord = 1;
    if (endianTest.testByte[0] == 1) swapFlag = 1;
	else swapFlag = 0;

    image = (ImageRec *)malloc(sizeof(ImageRec));
    if (image == NULL)
	{
		fprintf(stderr, "Out of memory!\n");
		exit(1);
    }

	image->file = f;

    fread(image, 1, 12, image->file);

    if (swapFlag) ConvertShort(&image->imagic, 6);

    image->tmp	= (unsigned char *)malloc(image->xsize*256);
    image->tmpR = (unsigned char *)malloc(image->xsize*256);
    image->tmpG = (unsigned char *)malloc(image->xsize*256);
    image->tmpB = (unsigned char *)malloc(image->xsize*256);
    if (image->tmp == NULL || image->tmpR == NULL || image->tmpG == NULL ||
	image->tmpB == NULL) 
	{
		fprintf(stderr, "Out of memory!\n");
		exit(1);
    }

    if ((image->type & 0xFF00) == 0x0100)
	{
		x = image->ysize * image->zsize * sizeof(unsigned);
		image->rowStart = (unsigned *)malloc(x);
		image->rowSize = (int *)malloc(x);
		if (image->rowStart == NULL || image->rowSize == NULL)
		{
		    fprintf(stderr, "Out of memory!\n");
		    exit(1);
		}
		image->rleEnd = 512 + (2 * x);
		fseek(image->file, 512+SEEK_SET_POS, SEEK_SET);
		fread(image->rowStart, 1, x, image->file);
		fread(image->rowSize, 1, x, image->file);
		if (swapFlag)
		{
			ConvertLong(image->rowStart, x/(int)sizeof(unsigned));
			ConvertLong((unsigned *)image->rowSize, x/(int)sizeof(int));
		}
    }
	else
	{
		image->rowStart = NULL;
		image->rowSize = NULL;
    }
    return image;
}

/* Close Image and free data */
static void ImageClose(ImageRec *image)
{
	free(image->tmp);
	free(image->tmpR);
	free(image->tmpG);
	free(image->tmpB);
    free(image->rowSize);
    free(image->rowStart);
    free(image);
}

/* Pixels row decoding (if used RLE encoding) */
static void ImageGetRow(ImageRec *image, unsigned char *buf, int y, int z)
{
    unsigned char *iPtr, *oPtr, pixel;
    int count;

    if ((image->type & 0xFF00) == 0x0100)
	{
		fseek(image->file, (long)image->rowStart[y+z*image->ysize]+SEEK_SET_POS, SEEK_SET);
		fread(image->tmp, 1, (unsigned int)image->rowSize[y+z*image->ysize], image->file);

		iPtr = image->tmp;
		oPtr = buf;
		for (;;)
		{
			pixel = *iPtr++;
		    count = (int)(pixel & 0x7F);
		    if (!count) return;
		    if (pixel & 0x80) while (count--) *oPtr++ = *iPtr++;
			else
			{
				pixel = *iPtr++;
				while (count--) *oPtr++ = pixel;
		    }
		}
    }
	else
	{
		fseek(image->file, 512+(y*image->xsize)+(z*image->xsize*image->ysize)+SEEK_SET_POS, SEEK_SET);
		fread(buf, 1, image->xsize, image->file);
    }
}

/* Read SGI (RGB) Image from file */
static unsigned *read_texture(FILE *f, int *width, int *height, int *components)
{
    unsigned *base, *lptr;
    unsigned char *rbuf, *gbuf, *bbuf, *abuf;
    ImageRec *image;
    int y;

    image = ImageOpen(f);
    
    if (!image)	return NULL;
    (*width) = image->xsize;
    (*height) = image->ysize;
    (*components) = image->zsize;
    
	base = (unsigned *)malloc(image->xsize*image->ysize*sizeof(unsigned));
    rbuf = (unsigned char *)malloc(image->xsize*sizeof(unsigned char));
    gbuf = (unsigned char *)malloc(image->xsize*sizeof(unsigned char));
    bbuf = (unsigned char *)malloc(image->xsize*sizeof(unsigned char));
    abuf = (unsigned char *)malloc(image->xsize*sizeof(unsigned char));
    
	if(!base || !rbuf || !gbuf || !bbuf) return NULL;
    lptr = base;
    for (y=0; y<image->ysize; y++)
	{
		if(image->zsize >= 4)
		{
			ImageGetRow(image, rbuf, y, 0);
			ImageGetRow(image, gbuf, y, 1);
			ImageGetRow(image, bbuf, y, 2);
			ImageGetRow(image, abuf, y, 3);
			rgbatorgba(rbuf,gbuf,bbuf,abuf,(unsigned char *)lptr,image->xsize);
			lptr += image->xsize;
		}
		else if(image->zsize == 3)
		{
			ImageGetRow(image,rbuf, y, 0);
			ImageGetRow(image,gbuf, y, 1);
			ImageGetRow(image,bbuf, y, 2);
			rgbtorgba(rbuf,gbuf,bbuf,(unsigned char *)lptr,image->xsize);
			lptr += image->xsize;
		}
		else if(image->zsize == 2)
		{
			ImageGetRow(image,rbuf, y, 0);
			ImageGetRow(image,abuf, y, 1);
			latorgba(rbuf,abuf,(unsigned char *)lptr,image->xsize);
			lptr += image->xsize;
		}
		else
		{
			ImageGetRow(image, rbuf, y, 0);
			bwtorgba(rbuf,(unsigned char *)lptr,image->xsize);
			lptr += image->xsize;
		}
    }
    ImageClose(image);
    free(rbuf);
    free(gbuf);
    free(bbuf);
    free(abuf);

    return (unsigned *) base;
}

/* Font texture conversion to mask texture */
unsigned* texture_to_mask(unsigned* tex, int width, int height)
{
	int nSize, i;
	unsigned *ret;

	nSize = width * height;
	ret = (unsigned *)malloc(nSize * sizeof(unsigned));
	for (i=0; i<nSize; i++)	ret[i] = tex[i] & 0x00ffffff ? 0 : 0x00ffffff;

	return ret;
}

/* Load BMF file format, function return bitmap font descriptor */
int glfLoadBMFFont(char *FName)
{
	FILE *f;
	char Header[4];
	char FontName[97];
	int i, flag;
	int LEndian;
	float tx, ty, tw, th;
	unsigned char temp, *tp;
	unsigned *texture;	/* Texture image */
	unsigned *mask;	/* Mask texture */
	int twidth, theight, tcomp;	/* Image parameters */
	float *temp_width;

	LEndian = LittleEndian();

	f = fopen(FName, "rb");
	if (f == NULL) return GLF_ERROR; /* Error opening file */

	/* Get header */
	fread(Header, 1, 3, f);
	Header[3] = 0;
	if (strcmp(Header, "BMF")) return GLF_ERROR; /* Not BMF format */

	/* Get font name */
	fread(FontName, 1, 96, f);
	FontName[96] = 0;

	/* Allocate space for temp widths */
	
	temp_width = (float *)malloc(sizeof(float)*256);

	/* Read all 256 symbols information */
	for (i=0; i<256; i++)
	{
		fread(&tx, 4, 1, f);
		fread(&ty, 4, 1, f);
		fread(&tw, 4, 1, f);
		fread(&th, 4, 1, f);

		if (!LEndian)
		{
			tp = (unsigned char *)&tx;
			temp = tp[0]; tp[0] = tp[3]; tp[3] = temp;
			temp = tp[1]; tp[1] = tp[2]; tp[2] = temp;
			tp = (unsigned char *)&ty;
			temp = tp[0]; tp[0] = tp[3]; tp[3] = temp;
			temp = tp[1]; tp[1] = tp[2]; tp[2] = temp;
			tp = (unsigned char *)&tw;
			temp = tp[0]; tp[0] = tp[3]; tp[3] = temp;
			temp = tp[1]; tp[1] = tp[2]; tp[2] = temp;
			tp = (unsigned char *)&th;
			temp = tp[0]; tp[0] = tp[3]; tp[3] = temp;
			temp = tp[1]; tp[1] = tp[2]; tp[2] = temp;
		}
		
		Symbols[i].x = tx;
		Symbols[i].y = ty;
		Symbols[i].width  = tw;
		Symbols[i].height = th;
		temp_width[i] = tw;
	}

	/* Read texture image from file and build texture */
	texture = read_texture(f, &twidth, &theight, &tcomp);
	/* Generate mask texture */
	mask = texture_to_mask(texture, twidth, theight);

	/* Find unused font descriptor */
	flag = 0;
	for (i=0; i<MAX_FONTS; i++)
		if (bmf_in_use[i] == 0)
		{
			/* Initialize this font */
			bmf_in_use[i] = 1;
			bmf_curfont = i;
			flag = 1;
			break;
		}
	if (!flag) /* Not enought space for new texture */
	{
		fclose(f);
		free(texture);
		free(mask);
		free(temp_width);
		return -1;
	}

	m_widths[bmf_curfont].width = temp_width;

	/* Generating textures for font and mask */
	glGenTextures(1, &bmf_texture[bmf_curfont]);
	glGenTextures(1, &bmf_mask[bmf_curfont]);


	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

	/* Build font texture */
	glBindTexture(GL_TEXTURE_2D, bmf_texture[bmf_curfont]);
	glTexImage2D(GL_TEXTURE_2D, 0, 3, twidth, theight, 0, GL_RGBA, GL_UNSIGNED_BYTE, texture);
	
	/* Linear filtering for better quality */
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	
	/* Build mask texture */
	glBindTexture(GL_TEXTURE_2D, bmf_mask[bmf_curfont]);
	glTexImage2D(GL_TEXTURE_2D, 0, 3, twidth, theight, 0, GL_RGBA, GL_UNSIGNED_BYTE, mask);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

	free(texture);
	free(mask);
	fclose(f);

	/* Now build list for each symbol */
	list_base[bmf_curfont] = glGenLists(256);
	for (i=0; i<256; i++)
	{
		glNewList(list_base[bmf_curfont]+i, GL_COMPILE);
		
		glBegin(GL_QUADS);
			glTexCoord2f(Symbols[i].x, Symbols[i].y); glVertex2f(0, 0);
			glTexCoord2f(Symbols[i].x+Symbols[i].width, Symbols[i].y); glVertex2f(Symbols[i].width, 0);
			glTexCoord2f(Symbols[i].x+Symbols[i].width, Symbols[i].y+Symbols[i].height); glVertex2f(Symbols[i].width, Symbols[i].height);
			glTexCoord2f(Symbols[i].x, Symbols[i].y+Symbols[i].height); glVertex2f(0, Symbols[i].height);
		glEnd();
		glTranslatef(Symbols[i].width+sym_space, 0, 0);

		glEndList();
		if (Symbols[i].height > m_max_height[bmf_curfont]) m_max_height[bmf_curfont] = Symbols[i].height;
	}
	return bmf_curfont;
}

/* Unloads bitmap font by descriptor */
int glfUnloadBMFFontD(int bmf_descriptor)
{
	if ((bmf_descriptor < 0) || (bmf_in_use[bmf_descriptor] == 0)) return GLF_ERROR;

	bmf_in_use[bmf_descriptor] = 0;

	glDeleteTextures(1, &bmf_texture[bmf_descriptor]);
	glDeleteTextures(1, &bmf_mask[bmf_descriptor]);

	if (bmf_descriptor == bmf_curfont) bmf_curfont = -1;

	return GLF_OK;
}

/* Unloads current bitmap font */
int glfUnloadBMFFont()
{
	return glfUnloadBMFFontD(bmf_curfont);
}

/* Start bitmap drawing function */
void glfStartBitmapDrawing()
{
	/* Enable 2D Texturing */
	glGetBooleanv(GL_TEXTURE_2D, &bmf_texturing);
	glEnable(GL_TEXTURE_2D);

	glBindTexture(GL_TEXTURE_2D, bmf_texture[bmf_curfont]);
}

/* Stop bitmap drawing function */
void glfStopBitmapDrawing()
{
	/* Return previuos state of texturing */
	if (bmf_texturing) glEnable(GL_TEXTURE_2D);
	else glDisable(GL_TEXTURE_2D);
}

/* Select current BMF font */
int glfSetCurrentBMFFont(int Font_Descriptor)
{
	if ((Font_Descriptor < 0) || (bmf_in_use[Font_Descriptor] == 0)) return GLF_ERROR;

	bmf_curfont = Font_Descriptor;
	return GLF_OK;
}

/* Get current BMF font */
int glfGetCurrentBMFFont()
{
	return bmf_curfont;
}

/* Draw one bitmapped symbol by current font */
void glfDrawBSymbol(char s)
{
	if ((bmf_curfont < 0) || (bmf_in_use[bmf_curfont] == 0)) return;
	
	glCallList(list_base[bmf_curfont]+(unsigned char)s);
}

/* Draw bitmapped string */
void glfDrawBString(char *s)
{
	GLfloat temp_trans;
	int i;

	temp_trans = 0;

	if ((bmf_curfont < 0) || (bmf_in_use[bmf_curfont] == 0)) return;

	/* Calculate length of all string */
	for (i=0; i<(int)strlen(s); i++)
		temp_trans += m_widths[bmf_curfont].width[s[i]] + sym_space;
	
	glListBase(list_base[bmf_curfont]);
	if (m_bitmap_string_center == GL_TRUE)
	{
		glPushMatrix();
		glTranslatef(-temp_trans/2, 0, 0);
	}
	glCallLists(strlen(s), GL_UNSIGNED_BYTE, (unsigned char *)s);
	if (m_bitmap_string_center == GL_TRUE)	glPopMatrix();
}

void glfDrawBMaskSymbol(char s)
{
	if ((bmf_curfont < 0) || (bmf_in_use[bmf_curfont] == 0)) return;
	
	glPushMatrix();
	glPushAttrib(GL_CURRENT_BIT);
	
	/* Draw the text as a mask in black */
	glColor3ub(0xff, 0xff, 0xff);
	glBlendFunc(GL_DST_COLOR, GL_ZERO);
	glBindTexture(GL_TEXTURE_2D, bmf_mask[bmf_curfont]);

	glCallList(list_base[bmf_curfont]+(unsigned char)s);

	glPopAttrib();
	glPopMatrix();
	
	glBindTexture(GL_TEXTURE_2D, bmf_texture[bmf_curfont]);
	
	/* Now draw the text over only the black bits in the requested color */
	glBlendFunc(GL_ONE, GL_ONE);

	glCallList(list_base[bmf_curfont]+(unsigned char)s);
}

void glfDrawBMaskString(char *s)
{
	GLfloat temp_trans;
	int i;

	temp_trans = 0;

	if ((bmf_curfont < 0) || (bmf_in_use[bmf_curfont] == 0)) return;

	/* Calculate length of all string */
	for (i=0; i<(int)strlen(s); i++)
		temp_trans += m_widths[bmf_curfont].width[s[i]] + sym_space;

	glPushMatrix();
	glPushAttrib(GL_CURRENT_BIT);
	
	/* Draw the text as a mask in black */
	glColor3ub(0xff, 0xff, 0xff);
	glBlendFunc(GL_DST_COLOR, GL_ZERO);
	glBindTexture(GL_TEXTURE_2D, bmf_mask[bmf_curfont]);

	glListBase(list_base[bmf_curfont]);
	if (m_bitmap_string_center == GL_TRUE)
	{
		glPushMatrix();
		glTranslatef(-temp_trans/2, 0, 0);
	}
	glCallLists(strlen(s), GL_UNSIGNED_BYTE, (unsigned char *)s);
	if (m_bitmap_string_center == GL_TRUE)	glPopMatrix();

	glPopAttrib();
	glPopMatrix();

	glBindTexture(GL_TEXTURE_2D, bmf_texture[bmf_curfont]);
	
	/* Now draw the text over only the black bits in the requested color */
	glBlendFunc(GL_ONE, GL_ONE);
	glListBase(list_base[bmf_curfont]);
	if (m_bitmap_string_center == GL_TRUE)
	{
		glPushMatrix();
		glTranslatef(-temp_trans/2, 0, 0);
	}
	glCallLists(strlen(s), GL_UNSIGNED_BYTE, (unsigned char *)s);
	if (m_bitmap_string_center == GL_TRUE)	glPopMatrix();
}

/* Set string centering for bitmap fonts */
void glfBitmapStringCentering(GLboolean center)
{
	m_bitmap_string_center = center;
}

/* Set string centering for bitmap fonts */
GLboolean glfBitmapGetStringCentering()
{
	return m_bitmap_string_center;
}

/* Set rotate angle for bitmap fonts */
void glfSetBRotateAngle(float angle)
{
	RotateAngleB = angle;
}
