Port font editor to SDL2 #59
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jouae
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Sorry, this function is not supported now. I'm trying to figure out how to let the second control point be moved by user. |
I figure out how to control second point. Press shift and arrow key at same time to move the control point. static void tweak_spline(char_t *c, cmd_t *first, int p2, double dx, double dy)
{
int i = p2 ? 1 : 0;
push(c);
first->pt[i].x += dx;
first->pt[i].y += dy;
}This |
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| { | ||
| char_t *c; | ||
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| if (!init(argc, argv)) |
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Dump the usage before calling exit.
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+ char_t *c;
+
+ /*
+ * Use the following command to start twin-fedit:Don't do that. Dump the message.
What kind of usage should I dump here?
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You can simply change the behavior of this font editor, allowing read a file from given filename (argv[1]). Thus, you can check argument count and the existence of file to proceed.
Replace X11 with SDL2 to improve the portability and cross-platform support
Migrated window creation from X11's `XCreateWindow` to `SDL_CreateWindow`.
Replaced X11 event handling with SDL2’s event loop (`SDL_PollEvent`)
to capture input events such as keyboard and mouse interactions.
Updated rendering to use `SDL_Renderer` and `SDL_Surface`,
replacing X11's rendering functions.
* Modified some key event logic:
1. SDLK_ESCAPE: ESC now exits the program.
2. SDL_QUIT: Clicking the "X" on the window exits the program.
* Unchanged key event logic:
1. SDLK_q: Switches to the next font.
* Rename delete function:
1. Rename delete() to delete_first_cmd() to avoid `clang-format` misinterpreting
`delete()` as the C++ the keyword, which cauese an extra space to be
added when running `clang-format`, turning `delete()` to `delete ()`.
* Add instructions and descriptions in the READMD.
1. Add the background of twin-fedit
2. Add Key bindings
3. Add a quick guide
4. Add demo GIF of twin-fedit
| char_t *c; | ||
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| * Use the following command to start twin-fedit: |
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Don't do that. Dump the message.
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| XClearArea(dpy, win, 0, 0, 0, 0, True); | ||
| for (;;) { |
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Try to merge the outer and inner loop. That is, use one while statement.
| ## Background | ||
| The glyphs in `twin-fedit` is originated from [Hershey vector fonts](https://en.wikipedia.org/wiki/Hershey_fonts), which were created by Dr. A. V. Hershey while working at the U. S. National Bureau of Standards. | ||
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| The Hershey vector fonts set of `twin-fedit` is [`nchars`](./nchars), for example, the interpolation points and operations used to draw the font `1` are as follows |
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1 is not "font". Instead, it is a glyph.
Replace X11 with SDL2 to improve the portability and cross-platform support
Migrated window creation from X11's
XCreateWindowtoSDL_CreateWindow.Replaced X11 event handling with SDL2’s event loop (
SDL_PollEvent) to capture input events such as keyboard and mouse interactions.Updated rendering to use
SDL_RendererandSDL_Surface, replacing X11's rendering functions.