moved code from header to source files

src/drawing.c

@@ -0,0 +1,85 @@
+#include "tim.h"
+
+TimCell tim_cell(cstr s, u8 fg, u8 bg) {
+    TimCell c = {.fg = fg, .bg  = bg, .n = 1, .buf = {s[0]}};
+    while ((s[c.n] & 192) == 128 && c.n < sizeof(c.buf)) {
+        c.buf[c.n] = s[c.n];
+        c.n += 1;
+    }
+    return c;
+}
+
+void tim_clear_cells(void) {
+    size_t size = sizeof(tim.cells[0]) * tim.w * tim.h;
+    memset(tim.cells, 0, size);
+}
+
+void tim_draw_chr(TimCell cell, i32 x, i32 y) {
+    if (x >= 0 && x < tim.w && y >= 0 && y < tim.h) {
+        tim.cells[x + y * tim.w] = cell;
+    }
+}
+
+void tim_draw_row(TimCell cell, i32 x, i32 y, i32 w) {
+    if (y >= 0 && y < tim.h && w > 0) {
+        for (i32 i = MAX(x, 0); i < MIN(x + w, tim.w); i++) {
+            tim.cells[i + y * tim.w] = cell;
+        }
+    }
+}
+
+void tim_draw_col(TimCell cell, i32 x, i32 y, i32 h) {
+    if (x >= 0 && x < tim.w && h > 0) {
+        for (i32 i = MAX(y, 0); i < MIN(y + h, tim.h); i++) {
+            tim.cells[x + i * tim.w] = cell;
+        }
+    }
+}
+
+void tim_draw_lot(TimCell cell, i32 x, i32 y, i32 w, i32 h) {
+    if (w > 0 && h > 0) {
+        for (i32 iy = MAX(y, 0); iy < MIN(y + h, tim.h); iy++) {
+            for (i32 ix = MAX(x, 0); ix < MIN(x + w, tim.w); ix++) {
+                tim.cells[ix + iy * tim.w] = cell;
+            }
+        }
+    }
+}
+
+void tim_draw_str(cstr s, i32 x, i32 y, i32 w, u8 fg, u8 bg) {
+    if (s && y >= 0 && x < tim.w && y < tim.h ) {
+        i32  end  = MIN(x + w, tim.w);
+        bool wide = false;
+        for (i32 i = 0; s[i] && x < end; x++) {
+            TimCell c = tim_cell(&s[i], fg, bg);
+            wide = wide || tim_utf8_is_wide_perhaps(c.buf, c.n);
+            if (x >= 0) {
+                c.wide = wide;
+                tim.cells[x + y * tim.w] = c;
+            }
+            i += c.n;
+        }
+    }
+}
+
+void tim_draw_box(i32 x, i32 y, i32 w, i32 h, u8 fg, u8 bg) {
+    tim_draw_chr(tim_cell("┌", fg, bg), x        , y);
+    tim_draw_chr(tim_cell("┐", fg, bg), x + w - 1, y);
+    tim_draw_chr(tim_cell("└", fg, bg), x        , y + h - 1);
+    tim_draw_chr(tim_cell("┘", fg, bg), x + w - 1, y + h - 1);
+    tim_draw_row(tim_cell("─", fg, bg), x + 1    , y        , w - 2);
+    tim_draw_row(tim_cell("─", fg, bg), x + 1    , y + h - 1, w - 2);
+    tim_draw_col(tim_cell("│", fg, bg), x        , y + 1    , h - 2);
+    tim_draw_col(tim_cell("│", fg, bg), x + w - 1, y + 1    , h - 2);
+    tim_draw_lot(tim_cell(" ", fg, bg), x + 1    , y + 1    , w - 2, h - 2);
+}
+
+void tim_draw_invert(i32 x, i32 y, i32 w) {
+    if (y >= 0 && y < tim.h && w > 0) {
+        for (i32 i = MAX(x, 0); i < MIN(x + w, tim.w); i++) {
+            TimCell c = tim.cells[i + y * tim.w];
+            tim.cells[i + y * tim.w].fg = c.bg;
+            tim.cells[i + y * tim.w].bg = c.fg;
+        }
+    }
+}