mirror of
https://bitbucket.org/CPMADevs/cnq3
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229 lines
7.5 KiB
C++
229 lines
7.5 KiB
C++
/*
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===========================================================================
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Copyright (C) 1999-2005 Id Software, Inc.
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This file is part of Quake III Arena source code.
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Quake III Arena source code is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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Quake III Arena source code is distributed in the hope that it will be
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useful, 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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You should have received a copy of the GNU General Public License
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along with Quake III Arena source code; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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===========================================================================
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*/
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// this code uses the FreeType library, LKGV 2.3.11, www.freetype.org
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#include "tr_local.h"
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#include <ft2build.h>
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#include <freetype/freetype.h>
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#include <freetype/ftoutln.h>
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static FT_Library ft = NULL;
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void R_InitFreeType()
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{
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tr.numFonts = 0;
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if (ft)
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ri.Error( ERR_DROP, "R_InitFreeType: Multiple initialization\n" );
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FT_Error err = FT_Init_FreeType(&ft);
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if (err != FT_Err_Ok)
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ri.Error( ERR_DROP, "R_InitFreeType: Failed (%d)\n", err );
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}
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void R_DoneFreeType()
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{
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if (ft)
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FT_Done_FreeType(ft);
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ft = NULL;
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}
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static __inline qbool IsPO2( unsigned int x )
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{
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return !(x & (x - 1));
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}
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static __inline unsigned int NextPO2( unsigned int x )
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{
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x |= (x >> 1);
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x |= (x >> 2);
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x |= (x >> 4);
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x |= (x >> 8);
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x |= (x >> 16);
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return (++x);
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}
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static __inline unsigned int CeilPO2( unsigned int x )
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{
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return (IsPO2(x) ? x : NextPO2(x));
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}
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// why the FUCK is this sort of thing not in the FT headers, sigh
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#define FLOAT_TO_FTPOS(x) ((x) * 64.0f)
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#define FTPOS_TO_FLOAT(x) ((x) / 64.0f)
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static qbool R_UploadGlyphs( FT_Face& face, fontInfo_t* font, const char* sImage )
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{
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int w = 0, i;
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for (i = 0; i < GLYPHS_PER_FONT; ++i) {
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FT_Load_Char( face, i + GLYPH_START, FT_LOAD_DEFAULT );
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FT_Outline_Translate( &face->glyph->outline, -face->glyph->metrics.horiBearingX, -face->size->metrics.descender );
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// TTF hinting is invariably absolute GARBAGE
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// always take the raw, CORRECT width and just handle the spacing ourselves
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font->pitches[i] = FTPOS_TO_FLOAT( face->glyph->metrics.width );
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// SPC will have a 0 width, so we have to use the hinted value for that
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if (!font->pitches[i])
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font->pitches[i] = FTPOS_TO_FLOAT( face->glyph->metrics.horiAdvance );
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if (font->pitches[i] > font->maxpitch)
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font->maxpitch = font->pitches[i];
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w += font->pitches[i] + 1; // pad cells to avoid blerp filter bleeds
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}
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// when squaring the texture, it's possible to have an "insoluble" case
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// e.g. if the font works out to exactly 512x16, the split point at 256 may be mid-char
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// so instead we just assume all chars are maxpitch and go from there
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// in practice, this actually has no impact at all on the total texel count anyway
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// there are all sorts of "clever" ways to pack glyphs, but they're just not worth it
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w = CeilPO2( font->maxpitch * GLYPHS_PER_FONT );
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int h = font->vpitch;
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while (h < w) {
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h <<= 1;
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w >>= 1;
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}
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font->tcheight = (float)font->vpitch / h;
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int xbase = 0, ybase = 0;
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byte* img = (byte*)Z_Malloc( 4 * w * h );
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FT_Bitmap ftb;
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ftb.pixel_mode = ft_pixel_mode_grays;
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ftb.num_grays = 256;
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ftb.rows = FTPOS_TO_FLOAT( face->size->metrics.height );
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ftb.pitch = ftb.width = font->maxpitch;
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ftb.buffer = (byte*)Z_Malloc( ftb.width * ftb.rows );
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for (i = 0; i < GLYPHS_PER_FONT; ++i) {
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Com_Memset( ftb.buffer, 0, ftb.width * ftb.rows );
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FT_Load_Char( face, i + GLYPH_START, FT_LOAD_DEFAULT );
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FT_Outline_Translate( &face->glyph->outline, -face->glyph->metrics.horiBearingX, -face->size->metrics.descender );
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FT_Outline_Get_Bitmap( ft, &face->glyph->outline, &ftb );
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if (xbase + font->maxpitch >= w) {
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xbase = 0;
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ybase += font->vpitch;
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}
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// users could calc the rhs tc easily enough if we added font->tcwidth, but it's a pain anyway
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font->ltr[i][0] = (float)xbase / w;
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font->ltr[i][1] = (float)ybase / h;
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font->ltr[i][2] = (float)(xbase + font->pitches[i]) / w;
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const byte* src = ftb.buffer;
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for (int y = 0; y < ftb.rows; ++y) {
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byte* dst = img + 4 * (xbase + ((ybase + y) * w));
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for (int x = 0; x < ftb.width; ++x) {
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*dst++ = 255;
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*dst++ = 255;
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*dst++ = 255;
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*dst++ = *src++;
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}
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}
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xbase += font->pitches[i] + 1;
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}
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image_t* image = R_CreateImage( sImage, img, w, h, GL_LUMINANCE_ALPHA, IMG_NOMIPMAP | IMG_NOPICMIP, GL_CLAMP_TO_EDGE );
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font->shader = RE_RegisterShaderFromImage( sImage, image );
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Z_Free( ftb.buffer );
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Z_Free( img );
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return qtrue;
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}
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/*
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since the original version of this didn't work, its design is hopelessly broken :(
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the behavior of ALL RegisterX calls exposed to the mod also allows use of them as "FindX"
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THIS one doesn't, which means the MOD has to screw around maintaining its own list as well
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*/
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qbool RE_RegisterFont( const char* fontName, int pointSize, fontInfo_t* info )
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{
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for (int i = 0; i < tr.numFonts; ++i) {
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const font_t* font = tr.fonts[i];
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if ( (font->pointsize == pointSize) && !Q_stricmp( font->name, fontName ) ) {
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*info = font->info;
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return qtrue;
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}
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}
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if (tr.numFonts == MAX_FONTS)
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ri.Error( ERR_DROP, "RE_RegisterFont: MAX_FONTS hit\n" );
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if (strlen(fontName) >= MAX_QPATH)
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ri.Error( ERR_DROP, "RE_RegisterFont: \"%s\" is too long\n", fontName );
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Com_Memset( info, 0, sizeof(*info) );
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byte* pTTF;
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int len = ri.FS_ReadFile( va("fonts/%s.ttf", fontName), (void**)&pTTF );
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if (!pTTF) {
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ri.Printf( PRINT_WARNING, "RE_RegisterFont: couldn't open fonts/%s.ttf\n", fontName );
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return qfalse;
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}
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FT_Face face;
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FT_Error err = FT_New_Memory_Face( ft, pTTF, len, 0, &face );
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ri.FS_FreeFile( pTTF );
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if (err != FT_Err_Ok) {
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ri.Printf( PRINT_ALL, "RE_RegisterFont: %s(%dpt) Failed (%d)\n", fontName, pointSize, err );
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return qfalse;
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}
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// no, this isn't a typo: we want to precompensate for the screen's aspect ratio
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//FT_Set_Pixel_Sizes( face, pointSize * glConfig.vidHeight / 640, pointSize * glConfig.vidHeight / 480 );
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// except that every damn TTF out there is already stupidly thin :(
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//FT_Set_Pixel_Sizes( face, pointSize * glConfig.vidWidth / 640, pointSize * glConfig.vidHeight / 480 );
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// bleh - okay... fonts HAVE to be scaled for "640x480", because that's the scale the UI works at
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// and if you've got something horrible like 1200x600, text is ludicrously fat :(
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// since the biggest concern from a user perspective is vertical spacing (chat etc)
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// and that's what point size "means", that's what we'll use as the control
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FT_Set_Pixel_Sizes( face, 0, pointSize * glConfig.vidHeight / 480 );
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info->vpitch = CeilPO2( FTPOS_TO_FLOAT( face->size->metrics.height ) );
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info->height = FTPOS_TO_FLOAT( face->size->metrics.height ) * SCREEN_HEIGHT / glConfig.vidHeight;
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R_UploadGlyphs( face, info, va( "*font-%s-%02d", fontName, pointSize ) );
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FT_Done_Face( face );
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ri.Printf( PRINT_DEVELOPER, "Loaded %s TTF (%dpt)\n", fontName, pointSize );
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font_t* font = RI_New<font_t>();
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tr.fonts[tr.numFonts++] = font;
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strcpy( font->name, fontName );
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font->pointsize = pointSize;
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font->info = *info;
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return qtrue;
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}
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