added NUL driver for DMesa

1 files changed, 222 insertions, 0 deletions

diff --git a/src/mesa/drivers/dos/null.c b/src/mesa/drivers/dos/null.c
new file mode 100644
index 00000000000..62e2c942ef9
--- /dev/null
+++ b/src/mesa/drivers/dos/null.c
@@ -0,0 +1,222 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  4.1
+ * 
+ * Copyright (C) 1999  Brian Paul   All Rights Reserved.
+ * 
+ * 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
+ * BRIAN PAUL 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.
+ */
+
+/*
+ * DOS/DJGPP device driver v1.6 for Mesa
+ *
+ *  Copyright (C) 2002 - Borca Daniel
+ *  Email : [email protected]
+ *  Web   : http://www.geocities.com/dborca
+ */
+
+
+#include <stdlib.h>
+#include <sys/segments.h>
+
+#include "video.h"
+#include "null.h"
+
+
+
+static vl_mode *modes;
+
+#define null_color_precision 8
+
+
+
+
+static void null_blit_nop (void)
+{
+}
+
+
+
+/* Desc: Attempts to detect VGA, check video modes and create selectors.
+ *
+ * In  : -
+ * Out : mode array
+ *
+ * Note: -
+ */
+static vl_mode *null_init (void)
+{
+ static int m[][2] = {
+        {320, 200},
+        {320, 240},
+        {400, 300},
+        {512, 384},
+        {640, 400},
+        {640, 480},
+        {800, 600},
+        {1024, 768},
+        {1280, 1024},
+        {1600, 1200}
+ };
+ static int b[] = {
+        8,
+        15,
+        16,
+        24,
+        32
+ };
+
+ unsigned int i, j, k;
+
+ if (modes == NULL) {
+    modes = malloc(sizeof(vl_mode) *
+                   (1 + (sizeof(m) / sizeof(m[0]) * sizeof(b) / sizeof(b[0]))));
+
+    if (modes != NULL) {
+       for (k = 0, i = 0; i < sizeof(m) / sizeof(m[0]); i++) {
+           for (j = 0; j < sizeof(b) / sizeof(b[0]); j++, k++) {
+               modes[k].xres    = m[i][0];
+               modes[k].yres    = m[i][1];
+               modes[k].bpp     = b[j];
+               modes[k].mode    = 0x4000;
+               modes[k].scanlen = m[i][0] * ((b[j] + 7) / 8);
+               modes[k].sel     = -1;
+               modes[k].gran    = -1;
+           }
+       }
+       modes[k].xres    = -1;
+       modes[k].yres    = -1;
+       modes[k].bpp     = -1;
+       modes[k].mode    = 0xffff;
+       modes[k].scanlen = -1;
+       modes[k].sel     = -1;
+       modes[k].gran    = -1;
+    }
+ }
+
+ return modes;
+}
+
+
+
+/* Desc: Frees all resources allocated by VGA init code.
+ *
+ * In  : -
+ * Out : -
+ *
+ * Note: -
+ */
+static void null_fini (void)
+{
+}
+
+
+
+/* Desc: Attempts to enter specified video mode.
+ *
+ * In  : ptr to mode structure, refresh rate
+ * Out : 0 if success
+ *
+ * Note: -
+ */
+static int null_entermode (vl_mode *p, int refresh)
+{
+ NUL.blit = null_blit_nop;
+
+ return 0;
+
+ (void)(p && refresh); /* silence compiler warning */
+}
+
+
+
+/* Desc: Restores to the mode prior to first call to null_entermode.
+ *
+ * In  : -
+ * Out : -
+ *
+ * Note: -
+ */
+static void null_restore (void)
+{
+}
+
+
+
+/* Desc: set one palette entry
+ *
+ * In  : color index, R, G, B
+ * Out : -
+ *
+ * Note: uses integer values
+ */
+static void null_setCI_i (int index, int red, int green, int blue)
+{
+ (void)(index && red && green && blue); /* silence compiler warning */
+}
+
+
+
+/* Desc: set one palette entry
+ *
+ * In  : color index, R, G, B
+ * Out : -
+ *
+ * Note: uses normalized values
+ */
+static void null_setCI_f (int index, float red, float green, float blue)
+{
+ float max = (1 << null_color_precision) - 1;
+
+ null_setCI_i(index, (int)(red * max), (int)(green * max), (int)(blue * max));
+}
+
+
+
+/* Desc: state retrieval
+ *
+ * In  : parameter name, ptr to storage
+ * Out : 0 if request successfully processed
+ *
+ * Note: -
+ */
+static int null_get (int pname, int *params)
+{
+ switch (pname) {
+        default:
+             params[0] = params[0]; /* silence compiler warning */
+             return -1;
+ }
+ return 0;
+}
+
+
+
+/*
+ * the driver
+ */
+vl_driver NUL = {
+          null_init,
+          null_entermode,
+          NULL,
+          null_setCI_f,
+          null_setCI_i,
+          null_get,
+          null_restore,
+          null_fini
+};