libdrawtext

changeset 3:fe0c54e574ae

fixed a bug in utf-8 decoding
author John Tsiombikas <nuclear@mutantstargoat.com>
date Thu, 15 Sep 2011 23:32:39 +0300
parents d8c3ce3fa588
children 17fed026b24b
files configure examples/Makefile examples/unicode/Makefile examples/unicode/unicode.c src/drawgl.c src/font.c src/utf8.c
diffstat 7 files changed, 156 insertions(+), 8 deletions(-) [+]
line diff
     1.1 --- a/configure	Thu Sep 15 13:56:54 2011 +0300
     1.2 +++ b/configure	Thu Sep 15 23:32:39 2011 +0300
     1.3 @@ -9,7 +9,6 @@
     1.4  	case $1 in
     1.5  	--prefix=*)
     1.6  		prefix=`echo $1 | sed 's/^--prefix=//'`
     1.7 -		shift
     1.8  		;;
     1.9  	--enable-opt)
    1.10  		opt=true
    1.11 @@ -30,6 +29,7 @@
    1.12  		use_ft2=false
    1.13  		;;
    1.14  	esac
    1.15 +	shift
    1.16  done
    1.17  
    1.18  echo 'Configuring libdrawtext...'
     2.1 --- a/examples/Makefile	Thu Sep 15 13:56:54 2011 +0300
     2.2 +++ b/examples/Makefile	Thu Sep 15 23:32:39 2011 +0300
     2.3 @@ -1,10 +1,19 @@
     2.4 -fonts = fonts/FreeSerif.ttf
     2.5 +fonts = fonts/FreeSerif.ttf fonts/klingon.ttf
     2.6  
     2.7  .PHONY: all
     2.8  all: $(fonts)
     2.9  	cd simple; $(MAKE)
    2.10  
    2.11  fonts/FreeSerif.ttf:
    2.12 +	mkdir -p fonts
    2.13  	wget http://ftp.gnu.org/gnu/freefont/freefont-ttf-20100919.tar.gz
    2.14  	tar xzvf freefont-ttf-20100919.tar.gz
    2.15 -	mv freefont-20100919 fonts
    2.16 +	rm -f freefont-ttf-20100919.tar.gz
    2.17 +	cp freefont-20100919/FreeSerif.ttf $@
    2.18 +
    2.19 +fonts/klingon.ttf:
    2.20 +	mkdir -p fonts
    2.21 +	wget http://blogs.msdn.com/cfs-file.ashx/__key/communityserver-components-postattachments/00-00-53-45-33/tlh_2D00_pIqaD_2D00_US.zip
    2.22 +	unzip -o tlh_2D00_pIqaD_2D00_US.zip
    2.23 +	rm -f tlh_2D00_pIqaD_2D00_US.zip
    2.24 +	cp tlh-pIqaD-US/pIqaD.ttf $@
     3.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     3.2 +++ b/examples/unicode/Makefile	Thu Sep 15 23:32:39 2011 +0300
     3.3 @@ -0,0 +1,34 @@
     3.4 +obj = unicode.o
     3.5 +bin = unicode
     3.6 +
     3.7 +CC = gcc
     3.8 +CFLAGS = -pedantic -Wall -g -I../../src
     3.9 +LDFLAGS = -L. -ldrawtext $(libgl)
    3.10 +
    3.11 +lib_so = libdrawtext.so
    3.12 +fonts = serif.ttf klingon.ttf
    3.13 +
    3.14 +ifeq ($(shell uname -s), Darwin)
    3.15 +	libgl = -framework OpenGL -framework GLUT
    3.16 +else
    3.17 +	libgl = -lGL -lGLU -lglut
    3.18 +endif
    3.19 +
    3.20 +$(bin): $(obj) $(lib_so) $(fonts)
    3.21 +	$(CC) -o $@ $(obj) $(LDFLAGS)
    3.22 +
    3.23 +$(lib_so): ../../libdrawtext.so.0.0
    3.24 +	rm -f $@
    3.25 +	ln -s $< $@
    3.26 +
    3.27 +serif.ttf: ../fonts/FreeSerif.ttf
    3.28 +	rm -f $@
    3.29 +	ln -s $< $@
    3.30 +
    3.31 +klingon.ttf: ../fonts/klingon.ttf
    3.32 +	rm -f $@
    3.33 +	ln -s $< $@
    3.34 +
    3.35 +.PHONY: clean
    3.36 +clean:
    3.37 +	rm -f $(obj) $(bin) $(lib_so)
     4.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     4.2 +++ b/examples/unicode/unicode.c	Thu Sep 15 23:32:39 2011 +0300
     4.3 @@ -0,0 +1,104 @@
     4.4 +/* Unicode libdrawtext example.
     4.5 + *
     4.6 + * Important parts are marked with XXX comments.
     4.7 + */
     4.8 +#include <stdio.h>
     4.9 +#include <stdlib.h>
    4.10 +
    4.11 +#ifndef __APPLE__
    4.12 +#include <GL/glut.h>
    4.13 +#else
    4.14 +#include <GLUT/glut.h>
    4.15 +#endif
    4.16 +
    4.17 +#include "drawtext.h"
    4.18 +
    4.19 +void disp(void);
    4.20 +void reshape(int x, int y);
    4.21 +void keyb(unsigned char key, int x, int y);
    4.22 +
    4.23 +/* XXX fonts are represented by the opaque struct dtx_font type, so you
    4.24 + * need to create at least one with dtx_open_font (see main).
    4.25 + */
    4.26 +struct dtx_font *freeserif, *klingon;
    4.27 +
    4.28 +#define FONT_SIZE	24
    4.29 +
    4.30 +int main(int argc, char **argv)
    4.31 +{
    4.32 +	glutInit(&argc, argv);
    4.33 +	glutInitWindowSize(512, 384);
    4.34 +	glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
    4.35 +	glutCreateWindow("libdrawtext example: simple");
    4.36 +
    4.37 +	glutDisplayFunc(disp);
    4.38 +	glutReshapeFunc(reshape);
    4.39 +	glutKeyboardFunc(keyb);
    4.40 +
    4.41 +	/* XXX dtx_open_font opens a font file and returns a pointer to dtx_font */
    4.42 +	if(!(freeserif = dtx_open_font("serif.ttf", 0))) {
    4.43 +		return 1;
    4.44 +	}
    4.45 +	dtx_prepare_range(freeserif, FONT_SIZE, 0, 256);	/* prepare ASCII */
    4.46 +	dtx_prepare_range(freeserif, FONT_SIZE, 0x0370, 0x0400);	/* greek */
    4.47 +	dtx_prepare_range(freeserif, FONT_SIZE, 0x4e00, 0x9fc0);	/* kanji */
    4.48 +
    4.49 +	if(!(klingon = dtx_open_font("klingon.ttf", 0))) {
    4.50 +		return 1;
    4.51 +	}
    4.52 +	dtx_prepare_range(klingon, FONT_SIZE, 0xf8d0, 0xf900);
    4.53 +
    4.54 +	glutMainLoop();
    4.55 +	return 0;
    4.56 +}
    4.57 +
    4.58 +const char *ascii_text = "Hello world!";
    4.59 +const char *greek_text = "\xce\x9a\xce\xbf\xcf\x8d\xcf\x81\xce\xb1\xcf\x83\xce\xb7";
    4.60 +const char *kanji_text = "\xe4\xb9\x97\xe4\xba\xac";
    4.61 +const char *klingon_text = "\xef\xa3\xa3\xef\xa3\x9d\xef\xa3\x93\xef\xa3\x98\xef\xa3\x9d\xef\xa3\xa2\xef\xa3\xa1\xef\xa3\x9d\xef\xa3\x99";
    4.62 +
    4.63 +
    4.64 +void disp(void)
    4.65 +{
    4.66 +	glClear(GL_COLOR_BUFFER_BIT);
    4.67 +
    4.68 +	glMatrixMode(GL_MODELVIEW);
    4.69 +	glLoadIdentity();
    4.70 +
    4.71 +	dtx_use_font(freeserif, FONT_SIZE);
    4.72 +
    4.73 +	glTranslatef(-200, 150, 0);
    4.74 +	/* XXX call dtx_string to draw utf-8 text.
    4.75 +	 * any transformations and the current color apply
    4.76 +	 */
    4.77 +	dtx_string(ascii_text);
    4.78 +
    4.79 +	glTranslatef(0, -40, 0);
    4.80 +	dtx_string(greek_text);
    4.81 +
    4.82 +	glTranslatef(0, -40, 0);
    4.83 +	dtx_string(kanji_text);
    4.84 +
    4.85 +	dtx_use_font(klingon, FONT_SIZE);
    4.86 +
    4.87 +	glTranslatef(0, -40, 0);
    4.88 +	dtx_string(klingon_text);
    4.89 +
    4.90 +	glutSwapBuffers();
    4.91 +}
    4.92 +
    4.93 +void reshape(int x, int y)
    4.94 +{
    4.95 +	glViewport(0, 0, x, y);
    4.96 +
    4.97 +	glMatrixMode(GL_PROJECTION);
    4.98 +	glLoadIdentity();
    4.99 +	glOrtho(-x/2, x/2, -y/2, y/2, -1, 1);
   4.100 +}
   4.101 +
   4.102 +void keyb(unsigned char key, int x, int y)
   4.103 +{
   4.104 +	if(key == 27) {
   4.105 +		exit(0);
   4.106 +	}
   4.107 +}
     5.1 --- a/src/drawgl.c	Thu Sep 15 13:56:54 2011 +0300
     5.2 +++ b/src/drawgl.c	Thu Sep 15 23:32:39 2011 +0300
     5.3 @@ -32,7 +32,7 @@
     5.4  static int vattr = -1;
     5.5  static int tattr = -1;
     5.6  static unsigned int font_tex;
     5.7 -static int buf_mode = DTX_LBF;
     5.8 +static int buf_mode = DTX_NBF;
     5.9  
    5.10  static struct dtx_font *font;
    5.11  static int font_sz;
     6.1 --- a/src/font.c	Thu Sep 15 13:56:54 2011 +0300
     6.2 +++ b/src/font.c	Thu Sep 15 23:32:39 2011 +0300
     6.3 @@ -155,7 +155,7 @@
     6.4  
     6.5  	FT_Set_Char_Size(fnt->face, 0, sz * 64, 72, 72);
     6.6  
     6.7 -	if(!(gmap = malloc(sizeof *gmap))) {
     6.8 +	if(!(gmap = calloc(1, sizeof *gmap))) {
     6.9  		return 0;
    6.10  	}
    6.11  
     7.1 --- a/src/utf8.c	Thu Sep 15 13:56:54 2011 +0300
     7.2 +++ b/src/utf8.c	Thu Sep 15 23:32:39 2011 +0300
     7.3 @@ -9,7 +9,7 @@
     7.4  	0xf,	/* three-bytes, 4 bits valid */
     7.5  	0x7		/* four-bytes, 3 bits valid */
     7.6  };
     7.7 -static const char first_shift[] = { 7, 5, 4, 3 };	/* see above */
     7.8 +static const char first_shift[] = { 0, 7, 5, 4, 3 };	/* see above */
     7.9  
    7.10  #define CONT_PREFIX	0x80
    7.11  #define CONT_MASK	0x3f
    7.12 @@ -30,7 +30,7 @@
    7.13  int dtx_utf8_char_code(const char *str)
    7.14  {
    7.15  	int i, nbytes, shift, code = 0;
    7.16 -	char mask;
    7.17 +	int mask;
    7.18  
    7.19  	if(!U8_IS_FIRST(*str)) {
    7.20  		return -1;
    7.21 @@ -47,9 +47,10 @@
    7.22  
    7.23  		code = (code << shift) | (*str++ & mask);
    7.24  		mask = 0x3f;
    7.25 -		shift = i == 0 ? first_shift[nbytes] : 6;
    7.26 +		shift = 6;
    7.27  	}
    7.28  
    7.29 +	printf("code: %x\n", code);
    7.30  	return code;
    7.31  }
    7.32