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-rw-r--r--com32/lib/syslinux/video/fontquery.c54
1 files changed, 54 insertions, 0 deletions
diff --git a/com32/lib/syslinux/video/fontquery.c b/com32/lib/syslinux/video/fontquery.c
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+++ b/com32/lib/syslinux/video/fontquery.c
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+/* ----------------------------------------------------------------------- *
+ *
+ * Copyright 2007-2008 H. Peter Anvin - All Rights Reserved
+ * Copyright 2009 Intel Corporation; author: H. Peter Anvin
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall
+ * be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * syslinux/video/forcetext.c
+ */
+
+#include <syslinux/video.h>
+#include <com32.h>
+
+/*
+ * Returns height of font or zero if no custom font loaded
+ */
+int syslinux_font_query(uint8_t **font)
+{
+ static com32sys_t ireg;
+ com32sys_t oreg;
+ int height;
+
+ ireg.eax.w[0] = 0x0018;
+ __intcall(0x22, &ireg, &oreg);
+
+ height = !(oreg.eflags.l & EFLAGS_CF) ? oreg.eax.b[0] : 0;
+ if (height)
+ *font = MK_PTR(oreg.es, oreg.ebx.w[0]);
+
+ return height;
+}
+