1 files changed, 111 insertions, 0 deletions

diff --git a/src/r_patch.h b/src/r_patch.h
new file mode 100644
index 0000000..b0d1387
--- /dev/null
+++ b/src/r_patch.h
@@ -0,0 +1,111 @@
+/* Emacs style mode select   -*- C++ -*-
+ *-----------------------------------------------------------------------------
+ *
+ *
+ *  PrBoom: a Doom port merged with LxDoom and LSDLDoom
+ *  based on BOOM, a modified and improved DOOM engine
+ *  Copyright (C) 1999 by
+ *  id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
+ *  Copyright (C) 1999-2000 by
+ *  Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
+ *  Copyright 2005, 2006 by
+ *  Florian Schulze, Colin Phipps, Neil Stevens, Andrey Budko
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ *  02111-1307, USA.
+ *
+ *-----------------------------------------------------------------------------*/
+
+
+#ifndef R_PATCH_H
+#define R_PATCH_H
+
+// Used to specify the sloping of the top and bottom of a column post
+typedef enum {
+  RDRAW_EDGESLOPE_TOP_UP   = (1<<0),
+  RDRAW_EDGESLOPE_TOP_DOWN = (1<<1),
+  RDRAW_EDGESLOPE_BOT_UP   = (1<<2),
+  RDRAW_EDGESLOPE_BOT_DOWN = (1<<3),
+  RDRAW_EDGESLOPE_TOP_MASK = 0x3,
+  RDRAW_EDGESLOPE_BOT_MASK = 0xc,  
+} edgeslope_t;
+
+typedef struct {
+  int topdelta;
+  int length;
+  edgeslope_t slope;
+} rpost_t;
+
+typedef struct {
+  int numPosts;
+  rpost_t *posts;
+  unsigned char *pixels;
+} rcolumn_t;
+
+typedef struct {
+  int width;
+  int height;
+  unsigned  widthmask;
+    
+  unsigned char isNotTileable;
+  
+  int leftoffset;
+  int topoffset;
+  
+  // this is the single malloc'ed/free'd array 
+  // for this patch
+  unsigned char *data;
+  
+  // these are pointers into the data array
+  unsigned char *pixels;
+  rcolumn_t *columns;
+  rpost_t *posts;
+
+#ifdef TIMEDIAG
+  int locktic;
+#endif
+  unsigned int locks;
+} rpatch_t;
+
+
+const rpatch_t *R_CachePatchNum(int id);
+void R_UnlockPatchNum(int id);
+#define R_CachePatchName(name) R_CachePatchNum(W_GetNumForName(name))
+#define R_UnlockPatchName(name) R_UnlockPatchNum(W_GetNumForName(name))
+
+const rpatch_t *R_CacheTextureCompositePatchNum(int id);
+void R_UnlockTextureCompositePatchNum(int id);
+
+
+// Size query funcs
+int R_NumPatchWidth(int lump) ;
+int R_NumPatchHeight(int lump);
+#define R_NamePatchWidth(name) R_NumPatchWidth(W_GetNumForName(name))
+#define R_NamePatchHeight(name) R_NumPatchHeight(W_GetNumForName(name))
+
+
+const rcolumn_t *R_GetPatchColumnWrapped(const rpatch_t *patch, int columnIndex);
+const rcolumn_t *R_GetPatchColumnClamped(const rpatch_t *patch, int columnIndex);
+
+
+// returns R_GetPatchColumnWrapped for square, non-holed textures
+// and R_GetPatchColumnClamped otherwise
+const rcolumn_t *R_GetPatchColumn(const rpatch_t *patch, int columnIndex);
+
+
+void R_InitPatches();
+void R_FlushAllPatches();
+
+#endif