Added FntOpen(), FntPrint() and FntFlush(), fixed termPrim() typo, fixed negative values in vsprintf(), added billboard sprites example

1 files changed, 189 insertions, 1 deletions

diff --git a/libpsn00b/psxetc/font.c b/libpsn00b/psxetc/font.c
index 46718d0..cd4acab 100644
--- a/libpsn00b/psxetc/font.c
+++ b/libpsn00b/psxetc/font.c
@@ -1,12 +1,27 @@
 #include <stdio.h>
+#include <string.h>
+#include <malloc.h>
 #include <ctype.h>
 #include <psxgpu.h>
 
-extern unsigned char dbugfont[];
+typedef struct _fnt_stream {
+	char *txtbuff;
+	char *txtnext;
+	char *pribuff;
+	short x,y;
+	short w,h;
+	int bg;
+	int maxchars;
+} _fnt_stream;
+
+static _fnt_stream _stream[8];
+static int _nstreams = 0;
 
 unsigned short _font_tpage;
 unsigned short _font_clut;
 
+extern unsigned char dbugfont[];
+
 void FntLoad(int x, int y) {
 
 	RECT pos;
@@ -34,4 +49,177 @@ void FntLoad(int x, int y) {
 	LoadImage( &pos, tim.caddr );
 	DrawSync(0);
 	
+	// Clear previously opened text streams
+	if( _nstreams ) {
+		
+		int i;
+		
+		for( i=0; i<_nstreams; i++ ) {
+			free(_stream[i].txtbuff);
+			free(_stream[i].pribuff);
+		}
+		
+		_nstreams = 0;
+		
+	}
+	
+}
+
+int FntOpen(int x, int y, int w, int h, int isbg, int n) {
+	
+	int i;
+	
+	// Initialize a text stream
+	_stream[_nstreams].x = x;
+	_stream[_nstreams].y = y;
+	_stream[_nstreams].w = w;
+	_stream[_nstreams].h = h;
+	
+	_stream[_nstreams].txtbuff = (char*)malloc(n+1);
+	
+	i = (sizeof(SPRT_8)*n)+sizeof(DR_TPAGE);
+	
+	if( isbg ) {
+		i += sizeof(TILE);
+	}
+	
+	_stream[_nstreams].pribuff = (char*)malloc(i);
+	_stream[_nstreams].maxchars = n;
+	
+	_stream[_nstreams].txtbuff[0] = 0x0;
+	_stream[_nstreams].txtnext = _stream[_nstreams].txtbuff;
+	_stream[_nstreams].bg = isbg;
+	
+	n = _nstreams;
+	_nstreams++;
+	
+	return n;
+	
+}
+
+int FntPrint(int id, const char *fmt, ...) {
+	
+	int n;
+	va_list ap;
+
+	if( id < 0 )
+		id = _nstreams-1;
+	
+	n = strlen(_stream[id].txtbuff);
+	
+	if( n >= _stream[id].maxchars ) {
+		return n;
+	}
+	
+	va_start(ap, fmt);
+	
+	n = vsnprintf(_stream[id].txtnext, _stream[id].maxchars-n, fmt, ap);
+	
+	_stream[id].txtnext += n;
+	
+	va_end(ap);
+	
+	return strlen(_stream[id].txtbuff);
+	
 }
+
+char *FntFlush(int id) {
+	
+	char		*opri;
+	SPRT_8		*sprt;
+	DR_TPAGE	*tpage;
+	char		*text;
+	int			 i,sx,sy;
+	
+	if( id < 0 )
+		id = _nstreams-1;
+	
+	sx = _stream[id].x;
+	sy = _stream[id].y;
+	
+	text = _stream[id].txtbuff;
+	
+	opri = _stream[id].pribuff;
+	
+	// Create TPage primitive
+	tpage = (DR_TPAGE*)opri;
+	setDrawTPage(tpage, 0, 0, _font_tpage);
+	
+	// Create a black rectangle background when enabled
+	if( _stream[id].bg ) {
+		
+		TILE *tile;
+		opri += sizeof(DR_TPAGE);
+		tile = (TILE*)opri;
+		
+		setTile(tile);
+		
+		if( _stream[id].bg == 2 )
+			setSemiTrans(tile, 1);
+		
+		setXY0(tile, _stream[id].x, _stream[id].y);
+		setWH(tile, _stream[id].w, _stream[id].h);
+		setRGB0(tile, 0, 0, 0);
+		setaddr(tpage, tile);
+		opri = (char*)tile;
+		
+		sprt = (SPRT_8*)(opri+sizeof(TILE));
+		
+	} else {
+		
+		sprt = (SPRT_8*)(opri+sizeof(DR_TPAGE));
+		
+	}
+	
+	// Create the sprite primitives
+	while( *text != 0 ) {
+	
+		if( ( *text == '\n' ) || ( ( sx-_stream[id].x ) > _stream[id].w-8 ) ) {
+			sx = _stream[id].x;
+			sy += 8;
+			
+			if( *text == '\n' )
+				text++;
+			
+			continue;
+		}
+		
+		if( ( sy-_stream[id].y ) > _stream[id].h-8 ) {
+			break;
+		}
+		
+		i = toupper( *text )-32;
+	
+		if( i > 0 ) {
+			
+			i--;
+			setSprt8( sprt );
+			setRGB0( sprt, 128, 128, 128 );
+			setXY0( sprt, sx, sy );
+			setUV0( sprt, (i%16)<<3, (i>>4)<<3 );
+			sprt->clut = _font_clut;
+			setaddr(opri, sprt);
+			opri = (char*)sprt;
+			sprt++;
+			
+		}
+	
+		sx += 8;
+		text++;
+		
+	}
+	
+	// Set a terminator value to the last primitive
+	termPrim(opri);
+	
+	// Draw the primitives
+	DrawSync(0);
+	DrawOTag((unsigned int*)_stream[id].pribuff);
+	DrawSync(0);
+	
+	_stream[id].txtnext = _stream[id].txtbuff;
+	_stream[id].txtbuff[0] = 0;
+	
+	return _stream[id].pribuff;
+	
+}
\ No newline at end of file