From 0ffb4f8463e3e06e8d88b7be22f5cb7adb702361 Mon Sep 17 00:00:00 2001
From: pk33 <pk33@pk33.space>
Date: Sun, 3 Nov 2024 22:26:28 +0100
Subject: fonts, text and basic ui for on-screen log

---
 src/strings33.c | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 src/strings33.c

(limited to 'src/strings33.c')

diff --git a/src/strings33.c b/src/strings33.c
new file mode 100644
index 0000000..0bb7ea0
--- /dev/null
+++ b/src/strings33.c
@@ -0,0 +1,78 @@
+#include "stdarg.h"
+#include "stdio.h"
+#include "string.h"
+
+#include "strings33.h"
+#include "types.h"
+
+
+extern Font33 defFont;
+extern Font33 bigFont;
+
+static Font33 *fonts[2] = {
+  &defFont, &bigFont
+};
+
+
+
+void e33_uprintf( Surface *surf, Size f, u32 col, Size x, Size y, const char *fmt, ... )
+{
+  static char tmp[512];
+
+  va_list args;
+  va_start(args, fmt);
+
+  vsprintf(tmp, fmt, args);
+  e33_uprint( surf, f, col, x, y, tmp );
+
+  va_end(args);
+}
+
+
+void e33_uprint( Surface *surf, Size f, u32 col, Size x, Size y, const char *str )
+{
+  Size i, j, ofs;
+  Font33 *font = fonts[f];
+  Size sWidth = surf->w;
+  Size sHeight = surf->h;
+  FontGlyph33 *glyphs = font->glyphs;
+  Size fbw = surf->w;
+  Size fbh = surf->h;
+  u32 *out;
+  uSize slen = strlen(str);
+
+  Size strWid = 0;
+  for( i = 0; i < slen; ++i ) {
+    strWid += glyphs[ str[i] - 0x20 ].width;
+  }
+
+  if( (x + strWid) >= sWidth ) {
+    x -= (strWid - (sWidth - x));
+  }
+  if( (y + font->height) >= sHeight ) {
+    y -= (font->height - (sHeight - y));
+  }
+
+  if(x < 0) { x = 0; }
+  if(y < 0) { y = 0; }
+  out = surf->data + (x + (y * surf->w));
+
+  for( i = 0, ofs = 0; i < slen; ++i )
+  {
+    FontGlyph33 *glyph = &glyphs[ str[i] - 0x20 ];
+    Size numPlots = glyph->num_plots;
+    Size gWidth = glyph->width;
+    u16 *plots = glyph->plots;
+
+    for( j = 0; j < numPlots; ++j )
+    {
+      Size plot = plots[j];
+      Size offset = (((plot & font->yAnd) * fbw) + (plot >> font->xShift)) + ofs;
+
+      memcpy( out + offset, &col, sizeof(u32) );
+    }
+
+    ofs += gWidth;
+  }
+}
+
-- 
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