nuclear@3: /* Unicode libdrawtext example.
nuclear@3:  *
nuclear@3:  * Important parts are marked with XXX comments.
nuclear@3:  */
nuclear@3: #include <stdio.h>
nuclear@3: #include <stdlib.h>
nuclear@3: 
nuclear@3: #ifndef __APPLE__
nuclear@3: #include <GL/glut.h>
nuclear@3: #else
nuclear@3: #include <GLUT/glut.h>
nuclear@3: #endif
nuclear@3: 
nuclear@3: #include "drawtext.h"
nuclear@3: 
nuclear@3: void disp(void);
nuclear@3: void reshape(int x, int y);
nuclear@3: void keyb(unsigned char key, int x, int y);
nuclear@3: 
nuclear@3: /* XXX fonts are represented by the opaque struct dtx_font type, so you
nuclear@3:  * need to create at least one with dtx_open_font (see main).
nuclear@3:  */
nuclear@4: struct dtx_font *fntmain, *fntcjk, *fntklingon;
nuclear@3: 
nuclear@4: #define FONT_SZ	24
nuclear@3: 
nuclear@3: int main(int argc, char **argv)
nuclear@3: {
nuclear@3: 	glutInit(&argc, argv);
nuclear@3: 	glutInitWindowSize(512, 384);
nuclear@3: 	glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
nuclear@4: 	glutCreateWindow("libdrawtext example: unicode");
nuclear@3: 
nuclear@3: 	glutDisplayFunc(disp);
nuclear@3: 	glutReshapeFunc(reshape);
nuclear@3: 	glutKeyboardFunc(keyb);
nuclear@3: 
nuclear@3: 	/* XXX dtx_open_font opens a font file and returns a pointer to dtx_font */
nuclear@4: 	if(!(fntmain = dtx_open_font("serif.ttf", 0))) {
nuclear@3: 		return 1;
nuclear@3: 	}
nuclear@4: 	dtx_prepare_range(fntmain, FONT_SZ, 0, 256);			/* ASCII */
nuclear@4: 	dtx_prepare_range(fntmain, FONT_SZ, 0x370, 0x400);		/* greek */
nuclear@4: 	dtx_prepare_range(fntmain, FONT_SZ, 0x400, 0x500);		/* cyrilic */
nuclear@3: 
nuclear@4: 	if(!(fntcjk = dtx_open_font("cjk.ttf", 0))) {
nuclear@3: 		return 1;
nuclear@3: 	}
nuclear@4: 	dtx_prepare_range(fntcjk, FONT_SZ, 0x4e00, 0x9fc0);		/* kanji */
nuclear@4: 
nuclear@4: 	if(!(fntklingon = dtx_open_font("klingon.ttf", 0))) {
nuclear@4: 		return 1;
nuclear@4: 	}
nuclear@4: 	dtx_prepare_range(fntklingon, FONT_SZ, 0xf8d0, 0xf900);	/* klingon */
nuclear@3: 
nuclear@3: 	glutMainLoop();
nuclear@3: 	return 0;
nuclear@3: }
nuclear@3: 
nuclear@4: /* various UTF-8 strings */
nuclear@4: const char *english_text = "Hello world!";
nuclear@3: const char *greek_text = "\xce\x9a\xce\xbf\xcf\x8d\xcf\x81\xce\xb1\xcf\x83\xce\xb7";
nuclear@4: const char *russian_text = "\xd0\xa0\xd0\xb0\xd1\x81\xd1\x86\xd0\xb2\xd0\xb5\xd1\x82\xd0\xb0\xd0\xbb\xd0\xb8 \xd1\x8f\xd0\xb1\xd0\xbb\xd0\xbe\xd0\xbd\xd0\xb8 \xd0\xb8 \xd0\xb3\xd1\x80\xd1\x83\xd1\x88\xd0\xb8";
nuclear@3: const char *kanji_text = "\xe4\xb9\x97\xe4\xba\xac";
nuclear@3: 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";
nuclear@3: 
nuclear@3: 
nuclear@3: void disp(void)
nuclear@3: {
nuclear@3: 	glClear(GL_COLOR_BUFFER_BIT);
nuclear@3: 
nuclear@3: 	glMatrixMode(GL_MODELVIEW);
nuclear@3: 	glLoadIdentity();
nuclear@3: 
nuclear@4: 	dtx_use_font(fntmain, FONT_SZ);
nuclear@3: 
nuclear@3: 	glTranslatef(-200, 150, 0);
nuclear@3: 	/* XXX call dtx_string to draw utf-8 text.
nuclear@3: 	 * any transformations and the current color apply
nuclear@3: 	 */
nuclear@4: 	dtx_string(english_text);
nuclear@3: 
nuclear@3: 	glTranslatef(0, -40, 0);
nuclear@3: 	dtx_string(greek_text);
nuclear@3: 
nuclear@3: 	glTranslatef(0, -40, 0);
nuclear@4: 	dtx_string(russian_text);
nuclear@4: 
nuclear@4: 	dtx_use_font(fntcjk, FONT_SZ);
nuclear@4: 
nuclear@4: 	glTranslatef(0, -40, 0);
nuclear@3: 	dtx_string(kanji_text);
nuclear@3: 
nuclear@4: 	dtx_use_font(fntklingon, FONT_SZ);
nuclear@3: 
nuclear@3: 	glTranslatef(0, -40, 0);
nuclear@3: 	dtx_string(klingon_text);
nuclear@3: 
nuclear@3: 	glutSwapBuffers();
nuclear@3: }
nuclear@3: 
nuclear@3: void reshape(int x, int y)
nuclear@3: {
nuclear@3: 	glViewport(0, 0, x, y);
nuclear@3: 
nuclear@3: 	glMatrixMode(GL_PROJECTION);
nuclear@3: 	glLoadIdentity();
nuclear@3: 	glOrtho(-x/2, x/2, -y/2, y/2, -1, 1);
nuclear@3: }
nuclear@3: 
nuclear@3: void keyb(unsigned char key, int x, int y)
nuclear@3: {
nuclear@3: 	if(key == 27) {
nuclear@3: 		exit(0);
nuclear@3: 	}
nuclear@3: }