1 files changed, 194 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/com32/lib/sys/vesacon_write.c b/contrib/syslinux-4.02/com32/lib/sys/vesacon_write.c
new file mode 100644
index 0000000..3769317
--- /dev/null
+++ b/contrib/syslinux-4.02/com32/lib/sys/vesacon_write.c
@@ -0,0 +1,194 @@
+/* ----------------------------------------------------------------------- *
+ *
+ *   Copyright 2004-2009 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.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * vesacon_write.c
+ *
+ * Write to the screen using ANSI control codes (about as capable as
+ * DOS' ANSI.SYS.)
+ */
+
+#include <errno.h>
+#include <string.h>
+#include <com32.h>
+#include <minmax.h>
+#include <colortbl.h>
+#include <console.h>
+#include <klibc/compiler.h>
+#include <syslinux/config.h>
+#include "ansi.h"
+#include "file.h"
+#include "vesa/video.h"
+
+static void vesacon_erase(const struct term_state *, int, int, int, int);
+static void vesacon_write_char(int, int, uint8_t, const struct term_state *);
+static void vesacon_showcursor(const struct term_state *);
+static void vesacon_setcursor(int x, int y, bool visible);
+static void vesacon_scroll_up(const struct term_state *);
+
+static struct term_state ts;
+static struct ansi_ops op = {
+    .erase = vesacon_erase,
+    .write_char = vesacon_write_char,
+    .showcursor = vesacon_showcursor,
+    .set_cursor = vesacon_setcursor,
+    .scroll_up = vesacon_scroll_up,
+    .beep = __ansicon_beep,
+};
+
+static struct term_info ti = {
+    .disabled = 0,
+    .ts = &ts,
+    .op = &op
+};
+
+/* Reference counter to the screen, to keep track of if we need
+   reinitialization. */
+static int vesacon_counter = 0;
+
+static struct {
+    int x, y;
+} vesacon_resolution = {
+    .x = DEFAULT_VESA_X_SIZE,
+    .y = DEFAULT_VESA_Y_SIZE,
+};
+
+/* Set desired resolution - requires a full close/open cycle */
+void vesacon_set_resolution(int x, int y)
+{
+    vesacon_resolution.x = x;
+    vesacon_resolution.y = y;
+}
+
+/* Common setup */
+int __vesacon_open(struct file_info *fp)
+{
+    (void)fp;
+
+    if (!vesacon_counter) {
+	/* Are we disabled? */
+	if (syslinux_serial_console_info()->flowctl & 0x8000) {
+	    ti.disabled = 1;
+	    ti.rows = 25;
+	    ti.cols = 80;
+	} else {
+	    /* Switch mode */
+	    if (__vesacon_init(vesacon_resolution.x, vesacon_resolution.y)) {
+		vesacon_counter = -1;
+		return EAGAIN;
+	    }
+
+	    /* Initial state */
+	    __ansi_init(&ti);
+	    ti.rows = __vesacon_text_rows;
+	    ti.cols = __vesacon_text_cols;
+	}
+    } else if (vesacon_counter == -1) {
+	return EAGAIN;
+    }
+
+    fp->o.rows = ti.rows;
+    fp->o.cols = ti.cols;
+
+    vesacon_counter++;
+    return 0;
+}
+
+int __vesacon_close(struct file_info *fp)
+{
+    (void)fp;
+
+    vesacon_counter--;
+    return 0;
+}
+
+/* Erase a region of the screen */
+static void vesacon_erase(const struct term_state *st,
+			  int x0, int y0, int x1, int y1)
+{
+    __vesacon_erase(x0, y0, x1, y1, st->cindex);
+}
+
+/* Draw text on the screen */
+static void vesacon_write_char(int x, int y, uint8_t ch,
+			       const struct term_state *st)
+{
+    __vesacon_write_char(x, y, ch, st->cindex);
+}
+
+/* Show or hide the cursor */
+static bool cursor_enabled = true;
+void vesacon_cursor_enable(bool enabled)
+{
+    cursor_enabled = enabled;
+}
+static void vesacon_showcursor(const struct term_state *st)
+{
+    vesacon_setcursor(st->xy.x, st->xy.y, st->cursor);
+}
+static void vesacon_setcursor(int x, int y, bool visible)
+{
+    __vesacon_set_cursor(x, y, visible && cursor_enabled);
+}
+
+static void vesacon_scroll_up(const struct term_state *st)
+{
+    __vesacon_scroll_up(1, st->cindex);
+}
+
+ssize_t __vesacon_write(struct file_info *fp, const void *buf, size_t count)
+{
+    const unsigned char *bufp = buf;
+    size_t n = 0;
+
+    (void)fp;
+
+    if (ti.disabled)
+	return count;		/* Nothing to do */
+
+    /* This only updates the shadow text buffer... */
+    while (count--) {
+	__ansi_putchar(&ti, *bufp++);
+	n++;
+    }
+
+    /* This actually draws it */
+    __vesacon_doit();
+
+    return n;
+}
+
+const struct output_dev dev_vesacon_w = {
+    .dev_magic = __DEV_MAGIC,
+    .flags = __DEV_TTY | __DEV_OUTPUT,
+    .fileflags = O_WRONLY | O_CREAT | O_TRUNC | O_APPEND,
+    .write = __vesacon_write,
+    .close = __vesacon_close,
+    .open = __vesacon_open,
+    .fallback = &dev_ansicon_w,
+};