Initial import.

1 files changed, 227 insertions, 0 deletions

diff --git a/src/mesa/drivers/dos/null.c b/src/mesa/drivers/dos/null.c
new file mode 100644
index 0000000..746de23
--- /dev/null
+++ b/src/mesa/drivers/dos/null.c
@@ -0,0 +1,227 @@
+/*
+ * 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 : dborca@users.sourceforge.net
+ *  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 NUL, 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
+   };
+   const unsigned int m_count = sizeof(m) / sizeof(m[0]);
+   const unsigned int b_count = sizeof(b) / sizeof(b[0]);
+
+   unsigned int i, j, k;
+
+   if (modes == NULL) {
+      modes = malloc(sizeof(vl_mode) * (1 + m_count * b_count));
+
+      if (modes != NULL) {
+         for (k = 0, i = 0; i < m_count; i++) {
+            for (j = 0; j < b_count; 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 NUL init code.
+ *
+ * In  : -
+ * Out : -
+ *
+ * Note: -
+ */
+static void null_fini (void)
+{
+   if (modes != NULL) {
+      free(modes);
+      modes = NULL;
+   }
+}
+
+
+
+/* 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
+};