899 lines
20 KiB
C
899 lines
20 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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/* FTMulti- a simple multiple masters font viewer */
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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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#include <freetype/ftrender.h>
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#include <freetype/ftmm.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 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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unsigned char autorun;
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int graph_init = 0;
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int render_mode = 1;
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int use_grays = 1;
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/* the standard raster's interface */
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FT_Renderer std_renderer;
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FT_Renderer smooth_renderer;
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FT_Multi_Master multimaster;
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FT_Long design_pos[T1_MAX_MM_AXIS];
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#define RASTER_BUFF_SIZE 32768
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char raster_buff[RASTER_BUFF_SIZE];
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#define DEBUGxxx
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#ifdef DEBUG
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#define LOG( x ) LogMessage##x
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#else
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#define LOG( x ) /* empty */
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#endif
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#ifdef DEBUG
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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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#endif
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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 named `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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static
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char bit_buffer[MAX_BUFFER];
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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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FT_Bitmap bit2;
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grBitmap bit3;
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int width, height, pitch, size;
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int left, right, top, bottom;
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int x_top, y_top;
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/* first, render the glyph into an intermediate buffer */
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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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if ( glyph->format == ft_glyph_format_outline )
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{
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pitch = antialias ? ( width + 3 ) & -4
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: ( width + 7 ) >> 3;
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size = pitch * height;
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if ( size > MAX_BUFFER )
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return FT_Err_Out_Of_Memory;
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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 = antialias ? ft_pixel_mode_grays : ft_pixel_mode_mono;
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bit2.buffer = bit_buffer;
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bit3.rows = bit2.rows;
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bit3.width = bit2.width;
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bit3.pitch = bit2.pitch;
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bit3.mode = antialias ? bit.mode : gr_pixel_mode_mono;
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bit3.buffer = bit_buffer;
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bit3.grays = 256;
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FT_Outline_Translate( &glyph->outline, -left, -bottom );
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memset( bit_buffer, 0, size );
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if ( low_prec )
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glyph->outline.flags &= ~ft_outline_high_precision;
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error = FT_Outline_Get_Bitmap( library, &glyph->outline, &bit2 );
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}
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else
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{
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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.mode = gr_pixel_mode_mono;
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bit3.buffer = glyph->bitmap.buffer;
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bit3.grays = 0;
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}
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/* then, blit the image to the target surface */
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x_top = x_offset + TRUNC( left );
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y_top = y_offset - TRUNC( top );
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#if 0
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if ( bit.pitch < 0 )
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y_top = bit.rows - y_top;
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#endif
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grBlitGlyphToBitmap( &bit, &bit3, x_top, y_top, fore_color );
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return FT_Err_Ok;
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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 = 36 + 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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#ifdef DEBUG
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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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#endif
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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 = 32 + 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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#ifdef DEBUG
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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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#endif
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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(" g : toggle between `smooth' and `standard' anti-aliaser" );
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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(" F3 : decrement first axis position by 20" );
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grWriteln(" F4 : increment first axis position by 20" );
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grWriteln(" F5 : decrement second axis position by 20" );
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grWriteln(" F6 : increment second axis position by 20" );
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grWriteln(" F7 : decrement third axis position by 20" );
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grWriteln(" F8 : increment third axis position by 20" );
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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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void reset_raster( void )
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{
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if ( antialias && use_grays && smooth_renderer )
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FT_Set_Renderer( library, smooth_renderer, 0, 0 );
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else
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FT_Set_Renderer( library, std_renderer, 0, 0 );
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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, axis;
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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 grKeyF1:
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case grKEY( '?' ):
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Help();
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return 1;
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/* mode keys */
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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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reset_raster();
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return 1;
|
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|
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case grKEY( 'b' ):
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use_sbits = !use_sbits;
|
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new_header = use_sbits ? "embedded bitmaps are now used if available"
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: "embedded bitmaps are now ignored";
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return 1;
|
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|
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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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|
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case grKEY( 'g' ):
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use_grays = !use_grays;
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new_header = use_grays ? "now using the smooth anti-aliaser"
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: "now using the standard anti-aliaser";
|
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reset_raster();
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break;
|
|
|
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case grKEY( 'l' ):
|
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low_prec = !low_prec;
|
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new_header = low_prec ? "rendering precision is now forced to low"
|
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: "rendering precision is now normal";
|
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break;
|
|
|
|
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;
|
|
|
|
/* MM related keys */
|
|
|
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case grKeyF3:
|
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i = -20;
|
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axis = 0;
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goto Do_Axis;
|
|
|
|
case grKeyF4:
|
|
i = 20;
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axis = 0;
|
|
goto Do_Axis;
|
|
|
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case grKeyF5:
|
|
i = -20;
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axis = 1;
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goto Do_Axis;
|
|
|
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case grKeyF6:
|
|
i = 20;
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axis = 1;
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goto Do_Axis;
|
|
|
|
case grKeyF7:
|
|
i = -20;
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axis = 2;
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goto Do_Axis;
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|
|
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case grKeyF8:
|
|
i = 20;
|
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axis = 2;
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goto Do_Axis;
|
|
|
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/* scaling related keys */
|
|
|
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case grKeyPageUp:
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i = 10;
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goto Do_Scale;
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|
|
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case grKeyPageDown:
|
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i = -10;
|
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goto Do_Scale;
|
|
|
|
case grKeyUp:
|
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i = 1;
|
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goto Do_Scale;
|
|
|
|
case grKeyDown:
|
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i = -1;
|
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goto Do_Scale;
|
|
|
|
/* glyph index related keys */
|
|
|
|
case grKeyLeft:
|
|
i = -1;
|
|
goto Do_Glyph;
|
|
|
|
case grKeyRight:
|
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i = 1;
|
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goto Do_Glyph;
|
|
|
|
case grKeyF9:
|
|
i = -100;
|
|
goto Do_Glyph;
|
|
|
|
case grKeyF10:
|
|
i = 100;
|
|
goto Do_Glyph;
|
|
|
|
case grKeyF11:
|
|
i = -1000;
|
|
goto Do_Glyph;
|
|
|
|
case grKeyF12:
|
|
i = 1000;
|
|
goto Do_Glyph;
|
|
|
|
default:
|
|
;
|
|
}
|
|
return 1;
|
|
|
|
Do_Axis:
|
|
if ( axis < multimaster.num_axis )
|
|
{
|
|
FT_MM_Axis* a = multimaster.axis + axis;
|
|
FT_Long pos = design_pos[axis];
|
|
|
|
|
|
pos += i;
|
|
if ( pos < a->minimum ) pos = a->minimum;
|
|
if ( pos > a->maximum ) pos = a->maximum;
|
|
|
|
design_pos[axis] = pos;
|
|
|
|
FT_Set_MM_Design_Coordinates( face, multimaster.num_axis, design_pos );
|
|
}
|
|
return 1;
|
|
|
|
Do_Scale:
|
|
ptsize += i;
|
|
if ( ptsize < 1 ) ptsize = 1;
|
|
if ( ptsize > MAXPTSIZE ) ptsize = MAXPTSIZE;
|
|
return 1;
|
|
|
|
Do_Glyph:
|
|
Num += i;
|
|
if ( Num < 0 ) Num = 0;
|
|
if ( Num >= num_glyphs ) Num = num_glyphs - 1;
|
|
return 1;
|
|
}
|
|
|
|
|
|
static
|
|
void usage( char* execname )
|
|
{
|
|
fprintf( stderr, "\n" );
|
|
fprintf( stderr, "ftmulti: multiple masters font viewer - part of FreeType\n" );
|
|
fprintf( stderr, "--------------------------------------------------------\n" );
|
|
fprintf( stderr, "\n" );
|
|
fprintf( stderr, "Usage: %s [options below] ppem fontname[.ttf|.ttc] ...\n",
|
|
execname );
|
|
fprintf( stderr, "\n" );
|
|
fprintf( stderr, " -r R use resolution R dpi (default: 72 dpi)\n" );
|
|
fprintf( stderr, " -f index specify first glyph index to display\n" );
|
|
fprintf( stderr, "\n" );
|
|
|
|
exit( 1 );
|
|
}
|
|
|
|
|
|
int
|
|
main( int argc,
|
|
char* argv[] )
|
|
{
|
|
int old_ptsize, orig_ptsize, file;
|
|
int first_glyph = 0;
|
|
int XisSetup = 0;
|
|
char* execname;
|
|
int option;
|
|
int file_loaded;
|
|
|
|
FT_Error error;
|
|
grEvent event;
|
|
|
|
execname = ft_basename( argv[0] );
|
|
|
|
while ( 1 )
|
|
{
|
|
option = getopt( argc, argv, "f:r:" );
|
|
|
|
if ( option == -1 )
|
|
break;
|
|
|
|
switch ( option )
|
|
{
|
|
case 'f':
|
|
first_glyph = atoi( optarg );
|
|
break;
|
|
|
|
case 'r':
|
|
res = atoi( optarg );
|
|
if ( res < 1 )
|
|
usage( execname );
|
|
break;
|
|
|
|
default:
|
|
usage( execname );
|
|
break;
|
|
}
|
|
}
|
|
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if ( argc <= 1 )
|
|
usage( execname );
|
|
|
|
if ( sscanf( argv[0], "%d", &orig_ptsize ) != 1 )
|
|
orig_ptsize = 64;
|
|
|
|
file = 1;
|
|
|
|
/* Initialize engine */
|
|
error = FT_Init_FreeType( &library );
|
|
if ( error )
|
|
PanicZ( "Could not initialize FreeType library" );
|
|
|
|
/* retrieve the standard raster's interface */
|
|
std_renderer = (FT_Renderer)FT_Get_Module( library, "standard renderer" );
|
|
if (!std_renderer)
|
|
PanicZ( "Could not retrieve standard renderer" );
|
|
|
|
smooth_renderer = (FT_Renderer)FT_Get_Module( library, "smooth renderer" );
|
|
|
|
NewFile:
|
|
ptsize = orig_ptsize;
|
|
hinted = 1;
|
|
file_loaded = 0;
|
|
|
|
/* Load face */
|
|
error = FT_New_Face( library, argv[file], 0, &face );
|
|
if ( error )
|
|
goto Display_Font;
|
|
|
|
/* retrieve multiple master information */
|
|
error = FT_Get_Multi_Master( face, &multimaster );
|
|
if ( error )
|
|
goto Display_Font;
|
|
|
|
/* set the current position to the median of each axis */
|
|
{
|
|
int n;
|
|
|
|
|
|
for ( n = 0; n < multimaster.num_axis; n++ )
|
|
design_pos[n] =
|
|
( multimaster.axis[n].minimum + multimaster.axis[n].maximum ) / 2;
|
|
}
|
|
|
|
error = FT_Set_MM_Design_Coordinates( face,
|
|
multimaster.num_axis,
|
|
design_pos );
|
|
if ( error )
|
|
goto Display_Font;
|
|
|
|
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( argv[file] ) );
|
|
|
|
if ( !new_header )
|
|
new_header = Header;
|
|
|
|
grWriteCellString( &bit, 0, 0, new_header, fore_color );
|
|
new_header = 0;
|
|
|
|
sprintf( Header, "axis: " );
|
|
{
|
|
int n;
|
|
|
|
|
|
for ( n = 0; n < multimaster.num_axis; n++ )
|
|
{
|
|
char temp[32];
|
|
|
|
|
|
sprintf( temp, " %s:%ld",
|
|
multimaster.axis[n].name,
|
|
design_pos[n] );
|
|
strcat( Header, temp );
|
|
}
|
|
}
|
|
grWriteCellString( &bit, 0, 16, Header, fore_color );
|
|
|
|
sprintf( Header, "at %d points, first glyph = %d",
|
|
ptsize,
|
|
Num );
|
|
}
|
|
else
|
|
{
|
|
sprintf( Header, "%s : not an MM font file, or could not be opened",
|
|
ft_basename( argv[file] ) );
|
|
}
|
|
|
|
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 */
|