ugui/text_rendering/main.c

#include <SDL2/SDL.h>
#include <SDL2/SDL_events.h>
#include <SDL2/SDL_video.h>
#include <stdlib.h>
#include <locale.h>
#include <stdio.h>

#include "ren.h"
#include "util.h"


//const char *str1 = "Ciao Mamma!\nprova: òçà°ù§|¬³¼$£ì\t";
const char *str1 = "ciao\tmamma";
const char *str2 = "The quick brown fox jumps over the lazy dog\n"
	"чащах юга жил бы цитрус? Да, но фальшивый экземпляр!\n"
	"Pijamalı hasta, yağız şoföre çabucak güvendi\n"
	"Pchnąć w tę łódź jeża lub ośm skrzyń fig\n"
	"イロハニホヘト チリヌルヲ ワカヨタレソ ツネナラム ウヰノオクヤマ ケフコエテ アサキユメミシ ヱヒモセスン\n"
	"Kæmi ný öxi hér ykist þjófum nú bæði víl og ádrepa";
SDL_Window *win;


#define red  0xff0000ff
#define blue 0xffff0000
void draw(void)
{
	static unsigned int frame = 0;
	printf("frame: %d\n", frame++);
	ren_clear();
	//ren_render_box(10, 10, 400, 50, blue);
	//if (ren_render_text(str1, 10, 10, 400, 50, 20))
	//	printf("text: %s\n", ren_strerror());
	int w, h;
	ren_get_text_box(str2, &w, &h, 20);
	//printf("box for: %s -> (%d, %d)\n", str2, w, h);
	ren_render_box(0, 0, w, h, blue);
	ren_render_text(str2, 0, 0, w, h, 20);

	// fixme: this causes a bug
	const char *s = "ciao mamma";
	ren_get_text_box(s, &w, &h, 12);
	s = "stuff that was not in font size 12 -> чащаx";
	ren_render_box(0, 200, w, h, red);
	if (ren_render_text(s, 0, 200, 0xffff, 0xffff, 12))
		printf("BUG\n");

	SDL_GL_SwapWindow(win);
}


int main(void)
{
	setlocale(LC_ALL, "en_US.UTF-8");

	SDL_Init(SDL_INIT_VIDEO | SDL_INIT_EVENTS);
	SDL_SetHint(SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR, "0");
	SDL_SetHint(SDL_HINT_MOUSE_FOCUS_CLICKTHROUGH, "1");
	SDL_SetHint(SDL_HINT_VIDEO_HIGHDPI_DISABLED, "0");

	win = SDL_CreateWindow(
		"test render",
		SDL_WINDOWPOS_UNDEFINED,
		SDL_WINDOWPOS_UNDEFINED,
		500,
		500,
		SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI);
	if (ren_init(win)) {
		printf("renderer init error: %s\n", ren_strerror());
		return 1;
	}

	SDL_Event e;
	while(1) {
		SDL_WaitEvent(&e);
		if (e.type == SDL_QUIT)
			break;
		if (e.type == SDL_WINDOWEVENT) {
			switch (e.window.event) {
			case SDL_WINDOWEVENT_RESIZED:
			case SDL_WINDOWEVENT_SIZE_CHANGED:
				ren_update_viewport(e.window.data1, e.window.data2);
				draw();
				break;
			case SDL_WINDOWEVENT_EXPOSED:
				draw();
				break;
			default: break;
			}
		}
	}

	ren_free();
	SDL_DestroyWindow(win);
	SDL_Quit();
	return 0;
}