f9ca2bb58a
It is now really the "glyph factory" that Stefan was probably dreaming about.. fixed some recent formatting errors from Werner ;-) cleaned up the demonstration programs from most of the rust that they had, though I'm sure someone is going to re-format them really soon !! "ftstring" now uses the new ftglyph.h API, and is now faster and smaller.. yep..
777 lines
18 KiB
C
777 lines
18 KiB
C
/****************************************************************************/
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/* */
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/* The FreeType project -- a free and portable quality TrueType renderer. */
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/* */
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/* Copyright 1996-2000 by */
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/* D. Turner, R.Wilhelm, and W. Lemberg */
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/* */
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/* */
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/* FTView - a simple font viewer. */
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/* */
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/* This is a new version using the MiGS graphics subsystem for */
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/* blitting and display. */
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/* */
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/* Press F1 when running this program to have a list of key-bindings */
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/* */
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/****************************************************************************/
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#include <freetype/freetype.h>
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/* the following header shouldn't be used in normal programs */
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#include <freetype/internal/ftdebug.h>
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#include "common.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include "graph.h"
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#include "grfont.h"
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#define DIM_X 500
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#define DIM_Y 400
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#define CENTER_X ( bit.width / 2 )
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#define CENTER_Y ( bit.rows / 2 )
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#define MAXPTSIZE 500 /* dtp */
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char Header[128];
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char* new_header = 0;
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const unsigned char* Text = (unsigned char*)
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"The quick brown fox jumped over the lazy dog 0123456789 "
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"\342\352\356\373\364\344\353\357\366\374\377\340\371\351\350\347 "
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"&#~\"\'(-`_^@)=+\260 ABCDEFGHIJKLMNOPQRSTUVWXYZ "
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"$\243^\250*\265\371%!\247:/;.,?<>";
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FT_Library library; /* the FreeType library */
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FT_Face face; /* the font face */
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FT_Size size; /* the font size */
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FT_GlyphSlot glyph; /* the glyph slot */
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FT_Error error; /* error code returned by FreeType */
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grSurface* surface; /* current display surface */
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grBitmap bit; /* current display bitmap */
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int num_glyphs; /* number of glyphs */
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int ptsize; /* current point size */
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int hinted = 1; /* is glyph hinting active? */
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int antialias = 1; /* is anti-aliasing active? */
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int use_sbits = 1; /* do we use embedded bitmaps? */
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int low_prec = 0; /* force low precision */
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int Num; /* current first glyph index */
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int res = 72;
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static grColor fore_color = { 255 };
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int Fail;
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int graph_init = 0;
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int render_mode = 1;
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int debug = 0;
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int trace_level = 0;
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#define RASTER_BUFF_SIZE 32768
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char raster_buff[RASTER_BUFF_SIZE];
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#define LOG( x ) LogMessage##x
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static
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void LogMessage( const char* fmt, ... )
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{
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va_list ap;
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va_start( ap, fmt );
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vfprintf( stderr, fmt, ap );
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va_end( ap );
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}
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/* PanicZ */
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static
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void PanicZ( const char* message )
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{
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fprintf( stderr, "%s\n error = 0x%04x\n", message, error );
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exit( 1 );
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}
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/* Clears the Bit bitmap/pixmap */
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static
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void Clear_Display( void )
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{
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long size = (long)bit.pitch * bit.rows;
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if ( size < 0 )
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size = -size;
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memset( bit.buffer, 0, size );
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}
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/* Initialize the display bitmap `bit' */
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static
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void Init_Display( void )
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{
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grInitDevices();
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bit.mode = gr_pixel_mode_gray;
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bit.width = DIM_X;
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bit.rows = DIM_Y;
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bit.grays = 256;
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surface = grNewSurface( 0, &bit );
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if ( !surface )
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PanicZ( "could not allocate display surface\n" );
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graph_init = 1;
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}
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#define MAX_BUFFER 300000
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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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/* Render a single glyph with the `grays' component */
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static
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FT_Error Render_Glyph( int x_offset,
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int y_offset )
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{
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grBitmap bit3;
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FT_Pos x_top, y_top;
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/* first, render the glyph image into a bitmap */
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if (glyph->format != ft_glyph_format_bitmap)
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{
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error = FT_Render_Glyph( glyph, antialias ? ft_render_mode_normal : ft_render_mode_mono );
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if (error) return error;
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}
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/* now blit it to our display screen */
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bit3.rows = glyph->bitmap.rows;
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bit3.width = glyph->bitmap.width;
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bit3.pitch = glyph->bitmap.pitch;
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bit3.buffer = glyph->bitmap.buffer;
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switch (glyph->bitmap.pixel_mode)
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{
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case ft_pixel_mode_mono:
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bit3.mode = gr_pixel_mode_mono;
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bit3.grays = 0;
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break;
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case ft_pixel_mode_grays:
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bit3.mode = gr_pixel_mode_gray;
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bit3.grays = glyph->bitmap.num_grays;
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}
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/* Then, blit the image to the target surface */
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x_top = x_offset + glyph->bitmap_left;
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y_top = y_offset - glyph->bitmap_top;
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grBlitGlyphToBitmap( &bit, &bit3, x_top, y_top, fore_color );
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return 0;
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}
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static
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FT_Error Reset_Scale( int pointSize )
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{
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FT_Error error;
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error = FT_Set_Char_Size( face, pointSize << 6,
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pointSize << 6,
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res,
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res );
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if ( error )
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{
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/* to be written */
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}
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return FT_Err_Ok;
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}
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static
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FT_Error LoadChar( int idx,
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int hint )
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{
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int flags;
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flags = FT_LOAD_DEFAULT;
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if ( !hint )
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flags |= FT_LOAD_NO_HINTING;
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if ( !use_sbits )
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flags |= FT_LOAD_NO_BITMAP;
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return FT_Load_Glyph( face, idx, flags );
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}
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static
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FT_Error Render_All( int first_glyph,
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int ptsize )
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{
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FT_F26Dot6 start_x, start_y, step_x, step_y, x, y;
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int i;
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FT_Error error;
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start_x = 4;
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start_y = 16 + ptsize ;
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step_x = size->metrics.x_ppem + 4;
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step_y = size->metrics.y_ppem + 10;
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x = start_x;
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y = start_y;
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i = first_glyph;
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#if 0
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while ( i < first_glyph + 1 )
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#else
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while ( i < num_glyphs )
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#endif
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{
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if ( !( error = LoadChar( i, hinted ) ) )
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{
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if ( debug && trace_level > 1 )
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{
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if ( i <= first_glyph + 6 )
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{
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LOG(( "metrics[%02d] = [%x %x]\n",
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i,
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glyph->metrics.horiBearingX,
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glyph->metrics.horiAdvance ));
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if ( i == first_glyph + 6 )
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LOG(( "-------------------------\n" ));
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}
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}
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Render_Glyph( x, y );
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x += ( glyph->metrics.horiAdvance >> 6 ) + 1;
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if ( x + size->metrics.x_ppem > bit.width )
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{
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x = start_x;
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y += step_y;
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if ( y >= bit.rows )
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return FT_Err_Ok;
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}
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}
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else
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Fail++;
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i++;
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}
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return FT_Err_Ok;
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}
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static
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FT_Error Render_Text( int first_glyph,
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int ptsize )
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{
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FT_F26Dot6 start_x, start_y, step_x, step_y, x, y;
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int i;
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FT_Error error;
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const unsigned char* p;
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start_x = 4;
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start_y = 12 + size->metrics.y_ppem;
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step_x = size->metrics.x_ppem + 4;
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step_y = size->metrics.y_ppem + 10;
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x = start_x;
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y = start_y;
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i = first_glyph;
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p = Text;
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while ( i > 0 && *p )
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{
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p++;
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i--;
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}
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while ( *p )
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{
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if ( !( error = LoadChar( FT_Get_Char_Index( face,
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(unsigned char)*p ),
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hinted ) ) )
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{
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if ( debug && trace_level > 1 )
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{
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if ( i <= first_glyph + 6 )
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{
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LOG(( "metrics[%02d] = [%x %x]\n",
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i,
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glyph->metrics.horiBearingX,
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glyph->metrics.horiAdvance ));
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if ( i == first_glyph + 6 )
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LOG(( "-------------------------\n" ));
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}
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}
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Render_Glyph( x, y );
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x += ( glyph->metrics.horiAdvance >> 6 ) + 1;
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if ( x + size->metrics.x_ppem > bit.width )
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{
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x = start_x;
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y += step_y;
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if ( y >= bit.rows )
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return FT_Err_Ok;
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}
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}
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else
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Fail++;
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i++;
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p++;
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}
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return FT_Err_Ok;
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}
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static
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void Help( void )
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{
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grEvent dummy_event;
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Clear_Display();
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grGotoxy( 0, 0 );
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grSetMargin( 2, 1 );
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grGotobitmap( &bit );
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grWriteln("FreeType Glyph Viewer - part of the FreeType test suite" );
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grLn();
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grWriteln("This program is used to display all glyphs from one or" );
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grWriteln("several font files, with the FreeType library.");
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grLn();
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grWriteln("Use the following keys :");
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grLn();
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grWriteln(" F1 or ? : display this help screen" );
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grWriteln(" a : toggle anti-aliasing" );
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grWriteln(" h : toggle outline hinting" );
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grWriteln(" b : toggle embedded bitmaps" );
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grWriteln(" l : toggle low precision rendering" );
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grWriteln(" space : toggle rendering mode" );
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grLn();
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grWriteln(" Up : increase pointsize by 1 unit" );
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grWriteln(" Down : decrease pointsize by 1 unit" );
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grWriteln(" Page Up : increase pointsize by 10 units" );
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grWriteln(" Page Down : decrease pointsize by 10 units" );
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grLn();
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grWriteln(" Right : increment first glyph index" );
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grWriteln(" Left : decrement first glyph index" );
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grLn();
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grWriteln(" F7 : decrement first glyph index by 10" );
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grWriteln(" F8 : increment first glyph index by 10" );
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grWriteln(" F9 : decrement first glyph index by 100");
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grWriteln(" F10 : increment first glyph index by 100");
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grWriteln(" F11 : decrement first glyph index by 1000");
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grWriteln(" F12 : increment first glyph index by 1000");
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grLn();
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grWriteln("press any key to exit this help screen");
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grRefreshSurface( surface );
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grListenSurface( surface, gr_event_key, &dummy_event );
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}
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static
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int Process_Event( grEvent* event )
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{
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int i;
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switch ( event->key )
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{
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case grKeyEsc: /* ESC or q */
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case grKEY( 'q' ):
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return 0;
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case grKEY( 'a' ):
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antialias = !antialias;
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new_header = antialias ? "anti-aliasing is now on"
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: "anti-aliasing is now off";
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return 1;
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case grKEY( 'b' ):
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use_sbits = !use_sbits;
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new_header = use_sbits
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? "embedded bitmaps are now used when available"
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: "embedded bitmaps are now ignored";
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return 1;
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case grKEY( 'n' ):
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case grKEY( 'p' ):
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return (int)event->key;
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case grKEY( 'l' ):
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low_prec = !low_prec;
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new_header = low_prec
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? "rendering precision is now forced to low"
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: "rendering precision is now normal";
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break;
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case grKEY( 'h' ):
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hinted = !hinted;
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new_header = hinted ? "glyph hinting is now active"
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: "glyph hinting is now ignored";
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break;
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case grKEY( ' ' ):
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render_mode ^= 1;
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new_header = render_mode ? "rendering all glyphs in font"
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: "rendering test text string" ;
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break;
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case grKeyF1:
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case grKEY( '?' ):
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Help();
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return 1;
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#if 0
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case grKeyF3: i = 16; goto Do_Rotate;
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case grKeyF4: i = -16; goto Do_Rotate;
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case grKeyF5: i = 1; goto Do_Rotate;
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case grKeyF6: i = -1; goto Do_Rotate;
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#endif
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case grKeyPageUp: i = 10; goto Do_Scale;
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case grKeyPageDown: i = -10; goto Do_Scale;
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case grKeyUp: i = 1; goto Do_Scale;
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case grKeyDown: i = -1; goto Do_Scale;
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case grKeyLeft: i = -1; goto Do_Glyph;
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case grKeyRight: i = 1; goto Do_Glyph;
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case grKeyF7: i = -10; goto Do_Glyph;
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case grKeyF8: i = 10; goto Do_Glyph;
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case grKeyF9: i = -100; goto Do_Glyph;
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case grKeyF10: i = 100; goto Do_Glyph;
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case grKeyF11: i = -1000; goto Do_Glyph;
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case grKeyF12: i = 1000; goto Do_Glyph;
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default:
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;
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}
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return 1;
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#if 0
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Do_Rotate:
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Rotation = ( Rotation + i ) & 1023;
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return 1;
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#endif
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Do_Scale:
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ptsize += i;
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if ( ptsize < 1 ) ptsize = 1;
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if ( ptsize > MAXPTSIZE ) ptsize = MAXPTSIZE;
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return 1;
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Do_Glyph:
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Num += i;
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if ( Num < 0 ) Num = 0;
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if ( Num >= num_glyphs ) Num = num_glyphs - 1;
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return 1;
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}
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static
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void usage( char* execname )
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{
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fprintf( stderr, "\n" );
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fprintf( stderr, "ftview: simple glyph viewer -- part of the FreeType project\n" );
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fprintf( stderr, "-----------------------------------------------------------\n" );
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fprintf( stderr, "\n" );
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fprintf( stderr, "Usage: %s [options below] ppem fontname[.ttf|.ttc] ...\n",
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execname );
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fprintf( stderr, "\n" );
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fprintf( stderr, " -d enable debugging messages\n" );
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fprintf( stderr, " -l N set debugging trace level to N (default: 0, max: 7)\n" );
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fprintf( stderr, " -r R use resolution R dpi (default: 72 dpi)\n" );
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fprintf( stderr, " -f index specify first glyph index to display\n" );
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fprintf( stderr, "\n" );
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exit( 1 );
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}
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int main( int argc,
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char* argv[] )
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{
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int i, old_ptsize, orig_ptsize, file;
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int first_glyph = 0;
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int XisSetup = 0;
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char filename[128 + 4];
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char alt_filename[128 + 4];
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char* execname;
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int option;
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int file_loaded;
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FT_Error error;
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grEvent event;
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execname = ft_basename( argv[0] );
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while ( 1 )
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{
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option = getopt( argc, argv, "df:l:r:" );
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if ( option == -1 )
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break;
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switch ( option )
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{
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case 'd':
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debug = 1;
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break;
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case 'f':
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first_glyph = atoi( optarg );
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break;
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case 'l':
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trace_level = atoi( optarg );
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if ( trace_level < 1 || trace_level > 7 )
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usage( execname );
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break;
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case 'r':
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res = atoi( optarg );
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if ( res < 1 )
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usage( execname );
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break;
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default:
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usage( execname );
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break;
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}
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}
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argc -= optind;
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argv += optind;
|
|
|
|
if ( argc <= 1 )
|
|
usage( execname );
|
|
|
|
if ( sscanf( argv[0], "%d", &orig_ptsize ) != 1 )
|
|
orig_ptsize = 64;
|
|
|
|
file = 1;
|
|
|
|
if ( debug )
|
|
{
|
|
#ifdef FT_DEBUG_LEVEL_TRACE
|
|
FT_SetTraceLevel( trace_any, (FT_Byte)trace_level );
|
|
#else
|
|
trace_level = 0;
|
|
#endif
|
|
}
|
|
|
|
/* Initialize engine */
|
|
error = FT_Init_FreeType( &library );
|
|
if ( error )
|
|
PanicZ( "Could not initialize FreeType library" );
|
|
|
|
NewFile:
|
|
ptsize = orig_ptsize;
|
|
hinted = 1;
|
|
file_loaded = 0;
|
|
|
|
filename[128] = '\0';
|
|
alt_filename[128] = '\0';
|
|
|
|
strncpy( filename, argv[file], 128 );
|
|
strncpy( alt_filename, argv[file], 128 );
|
|
|
|
/* try to load the file name as is, first */
|
|
error = FT_New_Face( library, argv[file], 0, &face );
|
|
if ( !error )
|
|
goto Success;
|
|
|
|
#ifndef macintosh
|
|
i = strlen( argv[file] );
|
|
while ( i > 0 && argv[file][i] != '\\' && argv[file][i] != '/' )
|
|
{
|
|
if ( argv[file][i] == '.' )
|
|
i = 0;
|
|
i--;
|
|
}
|
|
|
|
if ( i >= 0 )
|
|
{
|
|
strncpy( filename + strlen( filename ), ".ttf", 4 );
|
|
strncpy( alt_filename + strlen( alt_filename ), ".ttc", 4 );
|
|
}
|
|
#endif
|
|
|
|
/* Load face */
|
|
error = FT_New_Face( library, filename, 0, &face );
|
|
if ( error )
|
|
goto Display_Font;
|
|
|
|
Success:
|
|
file_loaded++;
|
|
|
|
error = Reset_Scale( ptsize );
|
|
if ( error )
|
|
goto Display_Font;
|
|
|
|
num_glyphs = face->num_glyphs;
|
|
glyph = face->glyph;
|
|
size = face->size;
|
|
|
|
Display_Font:
|
|
/* initialize graphics if needed */
|
|
if ( !XisSetup )
|
|
{
|
|
XisSetup = 1;
|
|
Init_Display();
|
|
}
|
|
|
|
grSetTitle( surface, "FreeType Glyph Viewer - press F1 for help" );
|
|
old_ptsize = ptsize;
|
|
|
|
if ( file_loaded >= 1 )
|
|
{
|
|
Fail = 0;
|
|
Num = first_glyph;
|
|
|
|
if ( Num >= num_glyphs )
|
|
Num = num_glyphs - 1;
|
|
|
|
if ( Num < 0 )
|
|
Num = 0;
|
|
}
|
|
|
|
for ( ;; )
|
|
{
|
|
int key;
|
|
|
|
|
|
Clear_Display();
|
|
|
|
if ( file_loaded >= 1 )
|
|
{
|
|
switch ( render_mode )
|
|
{
|
|
case 0:
|
|
Render_Text( Num, ptsize );
|
|
break;
|
|
|
|
default:
|
|
Render_All( Num, ptsize );
|
|
}
|
|
|
|
sprintf( Header, "%s %s (file `%s')",
|
|
face->family_name,
|
|
face->style_name,
|
|
ft_basename( filename ) );
|
|
|
|
if ( !new_header )
|
|
new_header = Header;
|
|
|
|
grWriteCellString( &bit, 0, 0, new_header, fore_color );
|
|
new_header = 0;
|
|
|
|
sprintf( Header, "at %d points, first glyph = %d",
|
|
ptsize,
|
|
Num );
|
|
}
|
|
else
|
|
sprintf( Header, "`%s': not a font file or could not be opened",
|
|
ft_basename( filename ) );
|
|
|
|
grWriteCellString( &bit, 0, 8, Header, fore_color );
|
|
grRefreshSurface( surface );
|
|
|
|
grListenSurface( surface, 0, &event );
|
|
if ( !( key = Process_Event( &event ) ) )
|
|
goto End;
|
|
|
|
if ( key == 'n' )
|
|
{
|
|
if (file_loaded >= 1)
|
|
FT_Done_Face( face );
|
|
|
|
if ( file < argc - 1 )
|
|
file++;
|
|
|
|
goto NewFile;
|
|
}
|
|
|
|
if ( key == 'p' )
|
|
{
|
|
if ( file_loaded >= 1 )
|
|
FT_Done_Face( face );
|
|
|
|
if ( file > 1 )
|
|
file--;
|
|
|
|
goto NewFile;
|
|
}
|
|
|
|
if ( ptsize != old_ptsize )
|
|
{
|
|
if ( Reset_Scale( ptsize ) )
|
|
PanicZ( "Could not resize font." );
|
|
|
|
old_ptsize = ptsize;
|
|
}
|
|
}
|
|
|
|
End:
|
|
#if 0
|
|
grDoneSurface(surface);
|
|
grDone();
|
|
#endif
|
|
|
|
printf( "Execution completed successfully.\n" );
|
|
printf( "Fails = %d\n", Fail );
|
|
|
|
exit( 0 ); /* for safety reasons */
|
|
return 0; /* never reached */
|
|
}
|
|
|
|
|
|
/* End */
|