339 lines
7.7 KiB
C
339 lines
7.7 KiB
C
/*
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cl_font.c - bare bones engine font manager
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Copyright (C) 2023 Alibek Omarov
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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*/
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#include "common.h"
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#include "filesystem.h"
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#include "client.h"
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#include "qfont.h"
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qboolean CL_FixedFont( cl_font_t *font )
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{
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return font && font->valid && font->type == FONT_FIXED;
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}
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static int CL_LoadFontTexture( const char *fontname, uint texFlags, int *width )
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{
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int font_width;
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int tex;
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if( !g_fsapi.FileExists( fontname, false ))
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return 0;
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tex = ref.dllFuncs.GL_LoadTexture( fontname, NULL, 0, texFlags );
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if( !tex )
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return 0;
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font_width = REF_GET_PARM( PARM_TEX_WIDTH, tex );
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if( !font_width )
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{
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ref.dllFuncs.GL_FreeTexture( tex );
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return 0;
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}
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*width = font_width;
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return tex;
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}
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qboolean Con_LoadFixedWidthFont( const char *fontname, cl_font_t *font, float scale, int rendermode, uint texFlags )
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{
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int font_width, i;
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if( font->valid )
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return true; // already loaded
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font->hFontTexture = CL_LoadFontTexture( fontname, texFlags, &font_width );
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if( !font->hFontTexture )
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return false;
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font->type = FONT_FIXED;
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font->valid = true;
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font->scale = scale;
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font->nearest = FBitSet( texFlags, TF_NEAREST );
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font->rendermode = rendermode;
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font->charHeight = Q_rint( font_width / 16 * scale );
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for( i = 0; i < ARRAYSIZE( font->fontRc ); i++ )
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{
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font->fontRc[i].left = ( i * font_width / 16 ) % font_width;
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font->fontRc[i].right = font->fontRc[i].left + font_width / 16;
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font->fontRc[i].top = ( i / 16 ) * ( font_width / 16 );
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font->fontRc[i].bottom = font->fontRc[i].top + font_width / 16;
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font->charWidths[i] = Q_rint( font_width / 16 * scale );
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}
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return true;
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}
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qboolean Con_LoadVariableWidthFont( const char *fontname, cl_font_t *font, float scale, int rendermode, uint texFlags )
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{
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fs_offset_t length;
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qfont_t src;
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byte *pfile;
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int font_width, i;
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if( font->valid )
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return true;
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pfile = g_fsapi.LoadFile( fontname, &length, false );
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if( !pfile )
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return false;
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if( length < sizeof( src ))
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{
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Mem_Free( pfile );
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return false;
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}
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memcpy( &src, pfile, sizeof( src ));
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Mem_Free( pfile );
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font->hFontTexture = CL_LoadFontTexture( fontname, texFlags, &font_width );
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if( !font->hFontTexture )
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return false;
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font->type = FONT_VARIABLE;
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font->valid = true;
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font->scale = scale;
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font->nearest = FBitSet( texFlags, TF_NEAREST );
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font->rendermode = rendermode;
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font->charHeight = Q_rint( src.rowheight * scale );
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for( i = 0; i < ARRAYSIZE( font->fontRc ); i++ )
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{
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const charinfo *ci = &src.fontinfo[i];
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font->fontRc[i].left = (word)ci->startoffset % font_width;
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font->fontRc[i].right = font->fontRc[i].left + ci->charwidth;
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font->fontRc[i].top = (word)ci->startoffset / font_width;
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font->fontRc[i].bottom = font->fontRc[i].top + src.rowheight;
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font->charWidths[i] = Q_rint( src.fontinfo[i].charwidth * scale );
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}
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return true;
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}
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void CL_FreeFont( cl_font_t *font )
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{
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if( !font || !font->valid )
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return;
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ref.dllFuncs.GL_FreeTexture( font->hFontTexture );
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memset( font, 0, sizeof( *font ));
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}
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static int CL_CalcTabStop( const cl_font_t *font, int x )
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{
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int space = font->charWidths[' '];
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int tab = space * 6; // 6 spaces
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int stop = tab - x % tab;
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if( stop < space )
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return tab * 2 - x % tab; // select next
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return stop;
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}
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int CL_DrawCharacter( float x, float y, int number, rgba_t color, cl_font_t *font, int flags )
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{
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wrect_t *rc;
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float w, h;
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float s1, t1, s2, t2, half = 0.5f;
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int texw, texh;
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if( !font || !font->valid || y < -font->charHeight )
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return 0;
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// check if printable
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if( number <= 32 )
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{
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if( number == ' ' )
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return font->charWidths[' '];
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else if( number == '\t' )
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return CL_CalcTabStop( font, x );
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return 0;
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}
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if( FBitSet( flags, FONT_DRAW_UTF8 ))
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number = Con_UtfProcessChar( number & 255 );
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else number &= 255;
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if( !number || !font->charWidths[number])
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return 0;
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R_GetTextureParms( &texw, &texh, font->hFontTexture );
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if( !texw || !texh )
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return font->charWidths[number];
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rc = &font->fontRc[number];
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if( font->nearest || font->scale <= 1.0f )
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half = 0;
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s1 = ((float)rc->left + half ) / texw;
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t1 = ((float)rc->top + half ) / texh;
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s2 = ((float)rc->right - half ) / texw;
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t2 = ((float)rc->bottom - half ) / texh;
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w = ( rc->right - rc->left ) * font->scale;
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h = ( rc->bottom - rc->top ) * font->scale;
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if( FBitSet( flags, FONT_DRAW_HUD ))
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SPR_AdjustSize( &x, &y, &w, &h );
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if( !FBitSet( flags, FONT_DRAW_NORENDERMODE ))
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ref.dllFuncs.GL_SetRenderMode( font->rendermode );
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// don't apply color to fixed fonts it's already colored
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if( font->type != FONT_FIXED || REF_GET_PARM( PARM_TEX_GLFORMAT, font->hFontTexture ) == 0x8045 ) // GL_LUMINANCE8_ALPHA8
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ref.dllFuncs.Color4ub( color[0], color[1], color[2], color[3] );
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else ref.dllFuncs.Color4ub( 255, 255, 255, color[3] );
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ref.dllFuncs.R_DrawStretchPic( x, y, w, h, s1, t1, s2, t2, font->hFontTexture );
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return font->charWidths[number];
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}
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int CL_DrawString( float x, float y, const char *s, rgba_t color, cl_font_t *font, int flags )
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{
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rgba_t current_color;
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int draw_len = 0;
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if( !font || !font->valid )
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return 0;
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if( FBitSet( flags, FONT_DRAW_UTF8 ))
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Con_UtfProcessChar( 0 ); // clear utf state
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if( !FBitSet( flags, FONT_DRAW_NORENDERMODE ))
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ref.dllFuncs.GL_SetRenderMode( font->rendermode );
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Vector4Copy( color, current_color );
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while( *s )
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{
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if( *s == '\n' )
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{
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s++;
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if( !*s )
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break;
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// some client functions ignore newlines
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if( !FBitSet( flags, FONT_DRAW_NOLF ))
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{
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draw_len = 0;
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y += font->charHeight;
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}
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if( FBitSet( flags, FONT_DRAW_RESETCOLORONLF ))
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Vector4Copy( color, current_color );
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continue;
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}
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if( IsColorString( s ))
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{
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// don't copy alpha
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if( !FBitSet( flags, FONT_DRAW_FORCECOL ))
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VectorCopy( g_color_table[ColorIndex(*( s + 1 ))], current_color );
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s += 2;
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continue;
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}
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// skip setting rendermode, it was changed for this string already
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draw_len += CL_DrawCharacter( x + draw_len, y, (byte)*s, current_color, font, flags | FONT_DRAW_NORENDERMODE );
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s++;
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}
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return draw_len;
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}
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void CL_DrawCharacterLen( cl_font_t *font, int number, int *width, int *height )
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{
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if( !font || !font->valid ) return;
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if( width )
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{
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if( number == '\t' )
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*width = CL_CalcTabStop( font, 0 ); // at least return max tabstop
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else *width = font->charWidths[number & 255];
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}
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if( height ) *height = font->charHeight;
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}
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void CL_DrawStringLen( cl_font_t *font, const char *s, int *width, int *height, int flags )
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{
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int draw_len = 0;
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if( !font || !font->valid )
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return;
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if( height )
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*height = font->charHeight;
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if( width )
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*width = 0;
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if( !COM_CheckString( s ))
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return;
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if( FBitSet( flags, FONT_DRAW_UTF8 ))
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Con_UtfProcessChar( 0 ); // reset utf state
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while( *s )
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{
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int number;
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if( *s == '\n' )
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{
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// BUG: no check for end string here
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// but high chances somebody's relying on this
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s++;
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draw_len = 0;
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if( !FBitSet( flags, FONT_DRAW_NOLF ))
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{
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if( height )
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*height += font->charHeight;
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}
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continue;
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}
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else if( *s == '\t' )
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{
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draw_len += CL_CalcTabStop( font, 0 ); // at least return max tabstop
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s++;
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continue;
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}
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if( IsColorString( s ))
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{
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s += 2;
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continue;
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}
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if( FBitSet( flags, FONT_DRAW_UTF8 ))
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number = Con_UtfProcessChar( (byte)*s );
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else number = (byte)*s;
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if( number )
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{
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draw_len += font->charWidths[number];
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if( draw_len > *width )
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*width = draw_len;
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}
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s++;
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}
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}
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