1libcaca-tutorial(3caca)             libcaca            libcaca-tutorial(3caca)
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NAME

6       libcaca-tutorial - A libcaca tutorial First, a very simple working
7       program, to check for basic libcaca functionalities.
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9       #include <caca.h>
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11       int main(void)
12       {
13           caca_canvas_t *cv; caca_display_t *dp; caca_event_t ev;
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15           dp = caca_create_display(NULL);
16           if(!dp) return 1;
17           cv = caca_get_canvas(dp);
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19           caca_set_display_title(dp, "Hello!");
20           caca_set_color_ansi(cv, CACA_BLACK, CACA_WHITE);
21           caca_put_str(cv, 0, 0, "This is a message");
22           caca_refresh_display(dp);
23           caca_get_event(dp, CACA_EVENT_KEY_PRESS, &ev, -1);
24           caca_free_display(dp);
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26           return 0;
27       }
28
29       What does it do?
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31       • Create a display. Physically, the display is either a window or a
32         context in a terminal (ncurses, slang) or even the whole screen
33         (VGA).
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35       • Get the display's associated canvas. A canvas is the surface where
36         everything happens: writing characters, sprites, strings, images...
37         It is unavoidable. Here the size of the canvas is set by the display.
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39       • Set the display's window name (only available in windowed displays,
40         does nothing otherwise).
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42       • Set the current canvas colours to black background and white
43         foreground.
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45       • Write the string 'This is a message' onto the canvas, using the
46         current colour pair.
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48       • Refresh the display, causing the text to be effectively displayed.
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50       • Wait for an event of type CACA_EVENT_KEY_PRESS.
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52       • Free the display (release memory). Since it was created together with
53         the display, the canvas will be automatically freed as well.
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55       You can then compile this code on an UNIX-like system using the
56       following commans (requiring pkg-config and gcc):
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58       gcc `pkg-config --libs --cflags caca` example.c -o example
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61Version 0.99.beta20             Thu Jul 21 2022        libcaca-tutorial(3caca)
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