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/*-----------------------------------------------------------------------------
Njamfont.cpp
Simple font class that loads font resource (fixed width/height bitmap)
and provides functions to render it to screen
Copyright 2003 Milan Babuskov
This file is part of Njam (http://njam.sourceforge.net).
Njam 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; either version 2 of the License, or
(at your option) any later version.
Njam 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 Njam in file COPYING; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-----------------------------------------------------------------------------*/
#include <stdio.h>
#include "SDL.h"
#include "sutils.h"
#include "njamfont.h"
//---------------------------------------------------------------------------
NjamFont::NjamFont(const char *Filename, int CharWidth, int CharHeight)
{
m_Surface = NULL;
printf("Loading font...");
SDL_Surface *temp = SDL_LoadBMP(Filename);
if (!temp)
{
printf("FAILED.\n");
printf((const char *)SDL_GetError(),"%s");
return;
}
printf("OK.\n");
// setting color key for font: black is transparent
Uint32 black = SDL_MapRGB(temp->format, 0, 0, 0);
SDL_SetColorKey(temp, SDL_SRCCOLORKEY, black);
/* Convert image to video format */
m_Surface = SDL_DisplayFormat(temp);
SDL_FreeSurface(temp);
if ( m_Surface == NULL )
fprintf(stderr, "Couldn't convert font image: %s\n", SDL_GetError());
m_CharWidth = CharWidth;
m_CharHeight = CharHeight;
}
//---------------------------------------------------------------------------
void NjamFont::setAlpha(Uint8 value)
{
if (m_Surface)
SDL_SetAlpha(m_Surface, SDL_SRCALPHA, value);
}
//---------------------------------------------------------------------------
NjamFont::~NjamFont()
{
if (m_Surface)
SDL_FreeSurface(m_Surface);
}
//---------------------------------------------------------------------------
unsigned int NjamFont::GetCharWidth()
{
return m_CharWidth;
}
//---------------------------------------------------------------------------
unsigned int NjamFont::GetCharHeight()
{
return m_CharHeight;
}
//---------------------------------------------------------------------------
// Writes text centered at screen
bool NjamFont::WriteTextCentered(SDL_Surface *Destination, int y, const char *Text)
{
int len=0;
while (Text[len++]); // get string length
int xpos = (Destination->w - len * m_CharWidth) / 2;
return WriteTextXY(Destination, xpos, y, Text);
}
//---------------------------------------------------------------------------
// Uses CharWidth and Height to split screen into Columns and Rows
bool NjamFont::WriteTextColRow(SDL_Surface *Destination, int Col, int Row, const char *Text)
{
return WriteTextXY(Destination, Col * m_CharWidth, Row * m_CharHeight, Text);
}
//---------------------------------------------------------------------------
// Outputs Text into Destionation surface at coordinate (x, y)
bool NjamFont::WriteTextXY(SDL_Surface *Destination, int x, int y, const char *Text)
{
const char FontMap[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.,;:!@*()%/";
if (!m_Surface || !Destination)
return false;
SDL_Rect src, dest;
src.y = 0;
src.w = m_CharWidth;
src.h = m_CharHeight;
if (-y > (int)m_CharHeight || y > Destination->h) // out of screen
return true;
for (int i=0; Text[i]; i++)
{
dest.y = y;
dest.x = x + i * m_CharWidth;
if (-dest.x > (int)m_CharWidth) // not yet in screen
continue;
if (dest.x > Destination->w) // outside
break;
if (Text[i] == ' ' || Text[i] == 10 || Text[i] == 13) // SPACE, NL, CR
continue;
bool Found = false;
for (int j=0; j < (sizeof(FontMap)/sizeof(char)); j++)
{
if (Text[i] == FontMap[j])
{
Found = true;
src.x = j * m_CharWidth;
if (0 != SDL_BlitSurface(m_Surface, &src, Destination, &dest))
{
printf("Failed to blit font character image.\n");
printf((const char *)SDL_GetError(),"%s");
return false;
}
break;
}
}
if (!Found)
printf("TEXT OUTPUT WARNING: Character: %c (code: %d) was not found.\n", Text[i], Text[i]);
}
return true;
}
//---------------------------------------------------------------------------
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