Wolfenstein 3-D!

This is a port of Wolf4SDL, which is derived from the original id
software source release. The port runs on top of the SDL plugin
runtime and is loaded as an overlay.

Licensing of the game code is not an issue, as discussed below
(essentially, the Debian project treats Wolf4SDL as GPLv2, with an
email from John Carmack backing it up):

  http://forums.rockbox.org/index.php?topic=52872

Included is a copy of MAME's Yamaha OPL sound chip emulator
(fmopl_gpl.c).  This file was not part of the original Wolf4SDL source
(which includes a non-GPL'd version), but was rather rebased from from
a later MAME source which had been relicensed to GPLv2.

Change-Id: I64c2ba035e0be7e2f49252f40640641416613439

1 files changed, 58 insertions, 0 deletions

diff --git a/apps/plugins/sdl/progs/wolf3d/id_pm.h b/apps/plugins/sdl/progs/wolf3d/id_pm.h
new file mode 100644
index 0000000000..bbedb78c78
--- /dev/null
+++ b/apps/plugins/sdl/progs/wolf3d/id_pm.h
@@ -0,0 +1,58 @@
+#ifndef __ID_PM__
+#define __ID_PM__
+
+#ifdef USE_HIRES
+#define PMPageSize 16384
+#else
+#define PMPageSize 4096
+#endif
+
+extern int ChunksInFile;
+extern int PMSpriteStart;
+extern int PMSoundStart;
+
+extern bool PMSoundInfoPagePadded;
+
+// ChunksInFile+1 pointers to page starts.
+// The last pointer points one byte after the last page.
+extern uint8_t **PMPages;
+
+void PM_Startup();
+void PM_Shutdown();
+
+static uint32_t PM_GetPageSize(int page)
+{
+    if(page < 0 || page >= ChunksInFile)
+        Quit("PM_GetPageSize: Tried to access illegal page: %i", page);
+    return (uint32_t) (PMPages[page + 1] - PMPages[page]);
+}
+
+static uint8_t *PM_GetPage(int page)
+{
+    if(page < 0 || page >= ChunksInFile)
+        Quit("PM_GetPage: Tried to access illegal page: %i", page);
+    return PMPages[page];
+}
+
+static uint8_t *PM_GetEnd()
+{
+    return PMPages[ChunksInFile];
+}
+
+static byte *PM_GetTexture(int wallpic)
+{
+    return PM_GetPage(wallpic);
+}
+
+static uint16_t *PM_GetSprite(int shapenum)
+{
+    // correct alignment is enforced by PM_Startup()
+    return (uint16_t *) (void *) PM_GetPage(PMSpriteStart + shapenum);
+}
+
+static byte *PM_GetSound(int soundpagenum)
+{
+    return PM_GetPage(PMSoundStart + soundpagenum);
+}
+
+#endif