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556 lines
16 KiB
C
556 lines
16 KiB
C
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/*
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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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// tr_font.c
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//
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//
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// The font system uses FreeType 2.x to render TrueType fonts for use within the game.
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// As of this writing ( Nov, 2000 ) Team Arena uses these fonts for all of the ui and
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// about 90% of the cgame presentation. A few areas of the CGAME were left uses the old
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// fonts since the code is shared with standard Q3A.
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//
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// If you include this font rendering code in a commercial product you MUST include the
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// following somewhere with your product, see www.freetype.org for specifics or changes.
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// The Freetype code also uses some hinting techniques that MIGHT infringe on patents
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// held by apple so be aware of that also.
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//
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// As of Q3A 1.25+ and Team Arena, we are shipping the game with the font rendering code
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// disabled. This removes any potential patent issues and it keeps us from having to
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// distribute an actual TrueTrype font which is 1. expensive to do and 2. seems to require
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// an act of god to accomplish.
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//
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// What we did was pre-render the fonts using FreeType ( which is why we leave the FreeType
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// credit in the credits ) and then saved off the glyph data and then hand touched up the
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// font bitmaps so they scale a bit better in GL.
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//
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// There are limitations in the way fonts are saved and reloaded in that it is based on
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// point size and not name. So if you pre-render Helvetica in 18 point and Impact in 18 point
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// you will end up with a single 18 point data file and image set. Typically you will want to
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// choose 3 sizes to best approximate the scaling you will be doing in the ui scripting system
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//
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// In the UI Scripting code, a scale of 1.0 is equal to a 48 point font. In Team Arena, we
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// use three or four scales, most of them exactly equaling the specific rendered size. We
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// rendered three sizes in Team Arena, 12, 16, and 20.
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//
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// To generate new font data you need to go through the following steps.
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// 1. delete the fontImage_x_xx.tga files and fontImage_xx.dat files from the fonts path.
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// 2. in a ui script, specificy a font, smallFont, and bigFont keyword with font name and
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// point size. the original TrueType fonts must exist in fonts at this point.
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// 3. run the game, you should see things normally.
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// 4. Exit the game and there will be three dat files and at least three tga files. The
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// tga's are in 256x256 pages so if it takes three images to render a 24 point font you
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// will end up with fontImage_0_24.tga through fontImage_2_24.tga
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// 5. In future runs of the game, the system looks for these images and data files when a s
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// specific point sized font is rendered and loads them for use.
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// 6. Because of the original beta nature of the FreeType code you will probably want to hand
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// touch the font bitmaps.
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//
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// Currently a define in the project turns on or off the FreeType code which is currently
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// defined out. To pre-render new fonts you need enable the define ( BUILD_FREETYPE ) and
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// uncheck the exclude from build check box in the FreeType2 area of the Renderer project.
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#include "tr_local.h"
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#include "../qcommon/qcommon.h"
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#ifdef BUILD_FREETYPE
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#include <ft2build.h>
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#include FT_ERRORS_H
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#include FT_SYSTEM_H
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#include FT_IMAGE_H
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#include FT_FREETYPE_H
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#include FT_OUTLINE_H
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#define _FLOOR(x) ((x) & -64)
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#define _CEIL(x) (((x)+63) & -64)
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#define _TRUNC(x) ((x) >> 6)
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FT_Library ftLibrary = NULL;
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#endif
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#define MAX_FONTS 6
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static int registeredFontCount = 0;
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static fontInfo_t registeredFont[MAX_FONTS];
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#ifdef BUILD_FREETYPE
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void R_GetGlyphInfo(FT_GlyphSlot glyph, int *left, int *right, int *width, int *top, int *bottom, int *height, int *pitch) {
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*left = _FLOOR( glyph->metrics.horiBearingX );
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*right = _CEIL( glyph->metrics.horiBearingX + glyph->metrics.width );
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*width = _TRUNC(*right - *left);
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*top = _CEIL( glyph->metrics.horiBearingY );
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*bottom = _FLOOR( glyph->metrics.horiBearingY - glyph->metrics.height );
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*height = _TRUNC( *top - *bottom );
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*pitch = ( qtrue ? (*width+3) & -4 : (*width+7) >> 3 );
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}
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FT_Bitmap *R_RenderGlyph(FT_GlyphSlot glyph, glyphInfo_t* glyphOut) {
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FT_Bitmap *bit2;
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int left, right, width, top, bottom, height, pitch, size;
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R_GetGlyphInfo(glyph, &left, &right, &width, &top, &bottom, &height, &pitch);
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if ( glyph->format == ft_glyph_format_outline ) {
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size = pitch*height;
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bit2 = ri.Malloc(sizeof(FT_Bitmap));
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bit2->width = width;
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bit2->rows = height;
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bit2->pitch = pitch;
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bit2->pixel_mode = ft_pixel_mode_grays;
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//bit2->pixel_mode = ft_pixel_mode_mono;
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bit2->buffer = ri.Malloc(pitch*height);
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bit2->num_grays = 256;
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Com_Memset( bit2->buffer, 0, size );
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FT_Outline_Translate( &glyph->outline, -left, -bottom );
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FT_Outline_Get_Bitmap( ftLibrary, &glyph->outline, bit2 );
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glyphOut->height = height;
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glyphOut->pitch = pitch;
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glyphOut->top = (glyph->metrics.horiBearingY >> 6) + 1;
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glyphOut->bottom = bottom;
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return bit2;
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} else {
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ri.Printf(PRINT_ALL, "Non-outline fonts are not supported\n");
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}
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return NULL;
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}
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void WriteTGA (char *filename, byte *data, int width, int height) {
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byte *buffer;
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int i, c;
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int row;
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unsigned char *flip;
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unsigned char *src, *dst;
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buffer = ri.Malloc(width*height*4 + 18);
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Com_Memset (buffer, 0, 18);
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buffer[2] = 2; // uncompressed type
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buffer[12] = width&255;
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buffer[13] = width>>8;
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buffer[14] = height&255;
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buffer[15] = height>>8;
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buffer[16] = 32; // pixel size
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// swap rgb to bgr
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c = 18 + width * height * 4;
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for (i=18 ; i<c ; i+=4)
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{
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buffer[i] = data[i-18+2]; // blue
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buffer[i+1] = data[i-18+1]; // green
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buffer[i+2] = data[i-18+0]; // red
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buffer[i+3] = data[i-18+3]; // alpha
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}
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// flip upside down
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flip = (unsigned char *)ri.Malloc(width*4);
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for(row = 0; row < height/2; row++)
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{
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src = buffer + 18 + row * 4 * width;
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dst = buffer + 18 + (height - row - 1) * 4 * width;
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Com_Memcpy(flip, src, width*4);
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Com_Memcpy(src, dst, width*4);
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Com_Memcpy(dst, flip, width*4);
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}
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ri.Free(flip);
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ri.FS_WriteFile(filename, buffer, c);
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//f = fopen (filename, "wb");
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//fwrite (buffer, 1, c, f);
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//fclose (f);
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ri.Free (buffer);
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}
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static glyphInfo_t *RE_ConstructGlyphInfo(unsigned char *imageOut, int *xOut, int *yOut, int *maxHeight, FT_Face face, const unsigned char c, qboolean calcHeight) {
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int i;
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static glyphInfo_t glyph;
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unsigned char *src, *dst;
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float scaled_width, scaled_height;
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FT_Bitmap *bitmap = NULL;
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Com_Memset(&glyph, 0, sizeof(glyphInfo_t));
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// make sure everything is here
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if (face != NULL) {
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FT_Load_Glyph(face, FT_Get_Char_Index( face, c), FT_LOAD_DEFAULT );
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bitmap = R_RenderGlyph(face->glyph, &glyph);
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if (bitmap) {
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glyph.xSkip = (face->glyph->metrics.horiAdvance >> 6) + 1;
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} else {
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return &glyph;
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}
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if (glyph.height > *maxHeight) {
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*maxHeight = glyph.height;
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}
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if (calcHeight) {
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ri.Free(bitmap->buffer);
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ri.Free(bitmap);
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return &glyph;
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}
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/*
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// need to convert to power of 2 sizes so we do not get
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// any scaling from the gl upload
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for (scaled_width = 1 ; scaled_width < glyph.pitch ; scaled_width<<=1)
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;
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for (scaled_height = 1 ; scaled_height < glyph.height ; scaled_height<<=1)
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;
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*/
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scaled_width = glyph.pitch;
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scaled_height = glyph.height;
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// we need to make sure we fit
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if (*xOut + scaled_width + 1 >= 255) {
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*xOut = 0;
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*yOut += *maxHeight + 1;
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}
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if (*yOut + *maxHeight + 1 >= 255) {
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*yOut = -1;
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*xOut = -1;
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ri.Free(bitmap->buffer);
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ri.Free(bitmap);
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return &glyph;
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}
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src = bitmap->buffer;
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dst = imageOut + (*yOut * 256) + *xOut;
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if (bitmap->pixel_mode == ft_pixel_mode_mono) {
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for (i = 0; i < glyph.height; i++) {
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int j;
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unsigned char *_src = src;
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unsigned char *_dst = dst;
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unsigned char mask = 0x80;
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unsigned char val = *_src;
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for (j = 0; j < glyph.pitch; j++) {
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if (mask == 0x80) {
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val = *_src++;
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}
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if (val & mask) {
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*_dst = 0xff;
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}
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mask >>= 1;
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if ( mask == 0 ) {
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mask = 0x80;
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}
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_dst++;
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}
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src += glyph.pitch;
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dst += 256;
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}
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} else {
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for (i = 0; i < glyph.height; i++) {
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Com_Memcpy(dst, src, glyph.pitch);
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src += glyph.pitch;
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dst += 256;
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}
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}
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// we now have an 8 bit per pixel grey scale bitmap
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// that is width wide and pf->ftSize->metrics.y_ppem tall
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glyph.imageHeight = scaled_height;
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glyph.imageWidth = scaled_width;
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glyph.s = (float)*xOut / 256;
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glyph.t = (float)*yOut / 256;
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glyph.s2 = glyph.s + (float)scaled_width / 256;
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glyph.t2 = glyph.t + (float)scaled_height / 256;
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*xOut += scaled_width + 1;
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ri.Free(bitmap->buffer);
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ri.Free(bitmap);
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}
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return &glyph;
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}
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#endif
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static int fdOffset;
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static byte *fdFile;
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int readInt( void ) {
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int i = fdFile[fdOffset]+(fdFile[fdOffset+1]<<8)+(fdFile[fdOffset+2]<<16)+(fdFile[fdOffset+3]<<24);
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fdOffset += 4;
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return i;
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}
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typedef union {
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byte fred[4];
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float ffred;
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} poor;
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float readFloat( void ) {
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poor me;
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#if defined Q3_BIG_ENDIAN
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me.fred[0] = fdFile[fdOffset+3];
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me.fred[1] = fdFile[fdOffset+2];
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me.fred[2] = fdFile[fdOffset+1];
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me.fred[3] = fdFile[fdOffset+0];
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#elif defined Q3_LITTLE_ENDIAN
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me.fred[0] = fdFile[fdOffset+0];
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me.fred[1] = fdFile[fdOffset+1];
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me.fred[2] = fdFile[fdOffset+2];
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me.fred[3] = fdFile[fdOffset+3];
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#endif
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fdOffset += 4;
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return me.ffred;
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}
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void RE_RegisterFont(const char *fontName, int pointSize, fontInfo_t *font) {
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#ifdef BUILD_FREETYPE
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FT_Face face;
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int j, k, xOut, yOut, lastStart, imageNumber;
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int scaledSize, newSize, maxHeight, left;
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unsigned char *out, *imageBuff;
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glyphInfo_t *glyph;
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image_t *image;
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qhandle_t h;
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float max;
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float dpi = 72;
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float glyphScale;
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#endif
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void *faceData;
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int i, len;
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char name[1024];
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if (!fontName) {
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ri.Printf(PRINT_ALL, "RE_RegisterFont: called with empty name\n");
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return;
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}
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if (pointSize <= 0) {
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pointSize = 12;
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}
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// make sure the render thread is stopped
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R_SyncRenderThread();
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if (registeredFontCount >= MAX_FONTS) {
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ri.Printf(PRINT_WARNING, "RE_RegisterFont: Too many fonts registered already.\n");
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return;
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}
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Com_sprintf(name, sizeof(name), "fonts/fontImage_%i.dat",pointSize);
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for (i = 0; i < registeredFontCount; i++) {
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if (Q_stricmp(name, registeredFont[i].name) == 0) {
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Com_Memcpy(font, ®isteredFont[i], sizeof(fontInfo_t));
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return;
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}
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}
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len = ri.FS_ReadFile(name, NULL);
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if (len == sizeof(fontInfo_t)) {
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ri.FS_ReadFile(name, &faceData);
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fdOffset = 0;
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fdFile = faceData;
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for(i=0; i<GLYPHS_PER_FONT; i++) {
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font->glyphs[i].height = readInt();
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font->glyphs[i].top = readInt();
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font->glyphs[i].bottom = readInt();
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font->glyphs[i].pitch = readInt();
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font->glyphs[i].xSkip = readInt();
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font->glyphs[i].imageWidth = readInt();
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font->glyphs[i].imageHeight = readInt();
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font->glyphs[i].s = readFloat();
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font->glyphs[i].t = readFloat();
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font->glyphs[i].s2 = readFloat();
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font->glyphs[i].t2 = readFloat();
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font->glyphs[i].glyph = readInt();
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Q_strncpyz(font->glyphs[i].shaderName, (const char *)&fdFile[fdOffset], sizeof(font->glyphs[i].shaderName));
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fdOffset += sizeof(font->glyphs[i].shaderName);
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}
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font->glyphScale = readFloat();
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Com_Memcpy(font->name, &fdFile[fdOffset], MAX_QPATH);
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// Com_Memcpy(font, faceData, sizeof(fontInfo_t));
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Q_strncpyz(font->name, name, sizeof(font->name));
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for (i = GLYPH_START; i < GLYPH_END; i++) {
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font->glyphs[i].glyph = RE_RegisterShaderNoMip(font->glyphs[i].shaderName);
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}
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Com_Memcpy(®isteredFont[registeredFontCount++], font, sizeof(fontInfo_t));
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return;
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}
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#ifndef BUILD_FREETYPE
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ri.Printf(PRINT_WARNING, "RE_RegisterFont: FreeType code not available\n");
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#else
|
||
|
if (ftLibrary == NULL) {
|
||
|
ri.Printf(PRINT_WARNING, "RE_RegisterFont: FreeType not initialized.\n");
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
len = ri.FS_ReadFile(fontName, &faceData);
|
||
|
if (len <= 0) {
|
||
|
ri.Printf(PRINT_WARNING, "RE_RegisterFont: Unable to read font file '%s'\n", fontName);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
// allocate on the stack first in case we fail
|
||
|
if (FT_New_Memory_Face( ftLibrary, faceData, len, 0, &face )) {
|
||
|
ri.Printf(PRINT_WARNING, "RE_RegisterFont: FreeType, unable to allocate new face.\n");
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
|
||
|
if (FT_Set_Char_Size( face, pointSize << 6, pointSize << 6, dpi, dpi)) {
|
||
|
ri.Printf(PRINT_WARNING, "RE_RegisterFont: FreeType, unable to set face char size.\n");
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
//*font = ®isteredFonts[registeredFontCount++];
|
||
|
|
||
|
// make a 256x256 image buffer, once it is full, register it, clean it and keep going
|
||
|
// until all glyphs are rendered
|
||
|
|
||
|
out = ri.Malloc(1024*1024);
|
||
|
if (out == NULL) {
|
||
|
ri.Printf(PRINT_WARNING, "RE_RegisterFont: ri.Malloc failure during output image creation.\n");
|
||
|
return;
|
||
|
}
|
||
|
Com_Memset(out, 0, 1024*1024);
|
||
|
|
||
|
maxHeight = 0;
|
||
|
|
||
|
for (i = GLYPH_START; i < GLYPH_END; i++) {
|
||
|
RE_ConstructGlyphInfo(out, &xOut, &yOut, &maxHeight, face, (unsigned char)i, qtrue);
|
||
|
}
|
||
|
|
||
|
xOut = 0;
|
||
|
yOut = 0;
|
||
|
i = GLYPH_START;
|
||
|
lastStart = i;
|
||
|
imageNumber = 0;
|
||
|
|
||
|
while ( i <= GLYPH_END ) {
|
||
|
|
||
|
glyph = RE_ConstructGlyphInfo(out, &xOut, &yOut, &maxHeight, face, (unsigned char)i, qfalse);
|
||
|
|
||
|
if (xOut == -1 || yOut == -1 || i == GLYPH_END) {
|
||
|
// ran out of room
|
||
|
// we need to create an image from the bitmap, set all the handles in the glyphs to this point
|
||
|
//
|
||
|
|
||
|
scaledSize = 256*256;
|
||
|
newSize = scaledSize * 4;
|
||
|
imageBuff = ri.Malloc(newSize);
|
||
|
left = 0;
|
||
|
max = 0;
|
||
|
for ( k = 0; k < (scaledSize) ; k++ ) {
|
||
|
if (max < out[k]) {
|
||
|
max = out[k];
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (max > 0) {
|
||
|
max = 255/max;
|
||
|
}
|
||
|
|
||
|
for ( k = 0; k < (scaledSize) ; k++ ) {
|
||
|
imageBuff[left++] = 255;
|
||
|
imageBuff[left++] = 255;
|
||
|
imageBuff[left++] = 255;
|
||
|
|
||
|
imageBuff[left++] = ((float)out[k] * max);
|
||
|
}
|
||
|
|
||
|
Com_sprintf (name, sizeof(name), "fonts/fontImage_%i_%i.tga", imageNumber++, pointSize);
|
||
|
if (r_saveFontData->integer) {
|
||
|
WriteTGA(name, imageBuff, 256, 256);
|
||
|
}
|
||
|
|
||
|
//Com_sprintf (name, sizeof(name), "fonts/fontImage_%i_%i", imageNumber++, pointSize);
|
||
|
image = R_CreateImage(name, imageBuff, 256, 256, qfalse, qfalse, GL_CLAMP_TO_EDGE);
|
||
|
h = RE_RegisterShaderFromImage(name, LIGHTMAP_2D, image, qfalse);
|
||
|
for (j = lastStart; j < i; j++) {
|
||
|
font->glyphs[j].glyph = h;
|
||
|
Q_strncpyz(font->glyphs[j].shaderName, name, sizeof(font->glyphs[j].shaderName));
|
||
|
}
|
||
|
lastStart = i;
|
||
|
Com_Memset(out, 0, 1024*1024);
|
||
|
xOut = 0;
|
||
|
yOut = 0;
|
||
|
ri.Free(imageBuff);
|
||
|
i++;
|
||
|
} else {
|
||
|
Com_Memcpy(&font->glyphs[i], glyph, sizeof(glyphInfo_t));
|
||
|
i++;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// change the scale to be relative to 1 based on 72 dpi ( so dpi of 144 means a scale of .5 )
|
||
|
glyphScale = 72.0f / dpi;
|
||
|
|
||
|
// we also need to adjust the scale based on point size relative to 48 points as the ui scaling is based on a 48 point font
|
||
|
glyphScale *= 48.0f / pointSize;
|
||
|
|
||
|
registeredFont[registeredFontCount].glyphScale = glyphScale;
|
||
|
font->glyphScale = glyphScale;
|
||
|
Com_Memcpy(®isteredFont[registeredFontCount++], font, sizeof(fontInfo_t));
|
||
|
|
||
|
if (r_saveFontData->integer) {
|
||
|
ri.FS_WriteFile(va("fonts/fontImage_%i.dat", pointSize), font, sizeof(fontInfo_t));
|
||
|
}
|
||
|
|
||
|
ri.Free(out);
|
||
|
|
||
|
ri.FS_FreeFile(faceData);
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
|
||
|
|
||
|
void R_InitFreeType(void) {
|
||
|
#ifdef BUILD_FREETYPE
|
||
|
if (FT_Init_FreeType( &ftLibrary )) {
|
||
|
ri.Printf(PRINT_WARNING, "R_InitFreeType: Unable to initialize FreeType.\n");
|
||
|
}
|
||
|
#endif
|
||
|
registeredFontCount = 0;
|
||
|
}
|
||
|
|
||
|
|
||
|
void R_DoneFreeType(void) {
|
||
|
#ifdef BUILD_FREETYPE
|
||
|
if (ftLibrary) {
|
||
|
FT_Done_FreeType( ftLibrary );
|
||
|
ftLibrary = NULL;
|
||
|
}
|
||
|
#endif
|
||
|
registeredFontCount = 0;
|
||
|
}
|
||
|
|