src/d_clisrv.c

@@ -16,6 +16,8 @@
 #include <unistd.h> //for unlink
 #endif
 
+#include <zlib.h>
+
 #include "i_time.h"
 #include "i_net.h"
 #include "i_system.h"
@@ -87,6 +89,17 @@ boolean serverrunning = false;
 INT32 serverplayer = 0;
 char motd[254], server_context[8]; // Message of the Day, Unique Context (even without Mumble support)
 
+#define MAP_ICON_REQUEST_FREQUENCY 8
+
+static UINT8 map_icon_index; // amount of fragments we have retrieved
+static UINT8 map_icon_needed; // amount of fragments we need to get the full data set
+static INT32 map_icon_read; // amount of bytes we have read
+static UINT32 map_icon_missing; // bitmask of fragments we haven't received yet
+static tic_t map_icon_last_request; // last time we sent an icon request, to avoid flood
+static int map_icon_request_count; // current count of icon requests sent
+static UINT8 *map_icon_data;
+static patch_t *map_icon;
+
 plrinfo playerinfo[MAXPLAYERS];
 SINT8 joinnode = 0; // used for CL_VIEWSERVER
 
@@ -1211,6 +1224,10 @@ static inline void CL_DrawConnectionStatus(void)
 	if (!menuactive) // menu already draws its own fade
 		V_DrawFadeScreen(0xFF00, 16); // force default
 
+	// reset the counter for mapicon
+	if (cl_mode != CL_VIEWSERVER)
+		map_icon_request_count = 0;
+
 	if (cl_mode != CL_DOWNLOADFILES && cl_mode != CL_LOADFILES && cl_mode != CL_CHECKFILES && cl_mode != CL_VIEWSERVER
 #ifdef HAVE_CURL
 	&& cl_mode != CL_DOWNLOADHTTPFILES
@@ -1337,9 +1354,42 @@ static inline void CL_DrawConnectionStatus(void)
 
 			V_DrawThinString(12 + 80, 18, V_ALLOWLOWERCASE, va("%s", serverlist[joinnode].info.servername));
 
-			const char *map = va("%sP", serverlist[joinnode].info.mapname);
-			patch_t *current_map = W_LumpExists(map) ? W_CachePatchName(map, PU_CACHE) : W_CachePatchName("BLANKLVL", PU_CACHE);
-			V_DrawSmallScaledPatch(10, 18, 0, current_map);
+			if (map_icon == NULL)
+			{
+				const char *map = va("%sP", serverlist[joinnode].info.mapname);
+				patch_t *current_map = W_LumpExists(map) ? W_CachePatchName(map, PU_CACHE) : NULL;
+
+				// check first if we may have the map icon loaded already
+				if (current_map != NULL)
+					V_DrawSmallScaledPatch(10, 18, 0, current_map);
+				else if (map_icon_data != NULL && map_icon_request_count <= 5)
+				{
+					if (I_GetTime() - map_icon_last_request > MAP_ICON_REQUEST_FREQUENCY)
+					{
+						doomdata_t *netbuffer = DOOMCOM_DATA(doomcom);
+						netbuffer->packettype = PT_NEEDMAPICON;
+
+						// failed to retrieve map icon, request it again
+						HSendPacket(servernode, false, 0, 0);
+						map_icon_last_request = I_GetTime();
+						map_icon_request_count++;
+					}
+
+					V_DrawFill(10, 18, MAP_ICON_WIDTH / 2, MAP_ICON_HEIGHT / 2, 31);
+					char dots[4] = "...";
+					if ((I_GetTime() & 0xf) < 4)
+						dots[0] = '\0';
+					else if ((I_GetTime() & 0xf) < 8)
+						dots[1] = '\0';
+					else if ((I_GetTime() & 0xf) < 12)
+						dots[2] = '\0';
+					V_DrawString(10 + MAP_ICON_WIDTH / 4 - V_StringWidth("...", 0) / 2, 18 + MAP_ICON_HEIGHT / 4 - 3, 0, dots);
+				}
+				else
+					V_DrawSmallScaledPatch(10, 18, 0, W_CachePatchName("BLANKLVL", PU_CACHE));
+			}
+			else
+				V_DrawSmallScaledPatch(10, 18, 0, map_icon);
 
 			if (serverlist[joinnode].info.iszone)
 				V_DrawThinString(12 + 80, 38, V_ALLOWLOWERCASE, va("%s Zone", serverlist[joinnode].info.maptitle));
@@ -1705,6 +1755,83 @@ static void SV_SendPlayerInfo(INT32 node)
 	HSendPacket(node, false, 0, sizeof(plrinfo) * MSCOMPAT_MAXPLAYERS);
 }
 
+static void SV_SendMapIcon(INT32 node)
+{
+	doomdata_t *netbuffer = DOOMCOM_DATA(doomcom);
+
+	const char *map = va("%sP", G_BuildMapName(gamemap));
+	if (!W_LumpExists(map) || (mapheaderinfo[gamemap-1]->menuflags & LF2_HIDEINMENU))
+	{
+		// send an empty icon to tell the client there is no map icon
+		netbuffer->packettype = PT_MAPICON;
+		UINT8 *icondata = netbuffer->u.mapicondata;
+		WRITEUINT8(icondata, 0x80);
+		HSendPacket(node, false, 0, 1);
+		return;
+	}
+
+	patch_t *current_map = W_CachePatchName(map, PU_CACHE);
+	if (current_map->width != MAP_ICON_WIDTH || current_map->height != MAP_ICON_HEIGHT)
+	{
+		// we only support 160x100 for now
+		netbuffer->packettype = PT_MAPICON;
+		UINT8 *icondata = netbuffer->u.mapicondata;
+		WRITEUINT8(icondata, 0x80);
+		HSendPacket(node, false, 0, 1);
+		return;
+	}
+
+	UINT8 *data = Z_Malloc(2 * current_map->width * current_map->height, PU_STATIC, NULL);
+	UINT8 *pixeldata = data + current_map->width * current_map->height;
+
+	R_PatchToPixels(current_map, pixeldata);
+
+	z_stream stream;
+	stream.zalloc = NULL;
+	stream.zfree = NULL;
+	stream.opaque = NULL;
+	if (deflateInit(&stream, Z_DEFAULT_COMPRESSION) != Z_OK)
+	{
+		CONS_Alert(CONS_WARNING, "Cannot compress map icon, not enough memory\n");
+		Z_Free(data);
+		return;
+	}
+
+	stream.next_in = pixeldata;
+	stream.avail_in = current_map->width * current_map->height;
+	stream.next_out = data;
+	stream.avail_out = current_map->width * current_map->height;
+	if (deflate(&stream, Z_FINISH) != Z_STREAM_END)
+	{
+		CONS_Alert(CONS_WARNING, "Cannot compress map icon, error occured during compression\n");
+		deflateEnd(&stream);
+		Z_Free(data);
+		return;
+	}
+	size_t count = stream.total_out;
+	deflateEnd(&stream);
+
+	size_t index = 0;
+
+	for (size_t i = 0; i < count; i += MAXPACKETLENGTH-BASEPACKETSIZE-1)
+	{
+		size_t size = min(MAXPACKETLENGTH-BASEPACKETSIZE-1, count-i);
+
+		UINT8 *icondata = netbuffer->u.mapicondata;
+		netbuffer->packettype = PT_MAPICON;
+
+		if (count-i <= MAXPACKETLENGTH-BASEPACKETSIZE-1)
+			WRITEUINT8(icondata, 0x80 | index);
+		else
+			WRITEUINT8(icondata, index);
+		index++;
+
+		WRITEMEM(icondata, &data[i], size);
+		HSendPacket(node, false, 0, size + 1);
+	}
+	Z_Free(data);
+}
+
 /** Sends a PT_SERVERCFG packet
   *
   * \param node The destination
@@ -2687,9 +2814,26 @@ static boolean CL_ServerConnectionTicker(const char *tmpsave, tic_t *oldtic, tic
 		if (cl_mode == CL_VIEWSERVER)
 		{
 			if (key == KEY_ENTER || key == KEY_JOY1)
+			{
 				cl_mode = CL_CHECKFILES;
+				if (map_icon != NULL)
+					Patch_Free(map_icon);
+				map_icon = NULL;
+				if (map_icon_data != NULL)
+					Z_Free(map_icon_data);
+				map_icon_data = NULL;
+			}
 			else if (key == KEY_ESCAPE || key == KEY_JOY1+1)
+			{
 				cl_mode = CL_ABORTED;
+				if (map_icon != NULL)
+					Patch_Free(map_icon);
+				map_icon = NULL;
+				if (map_icon_data != NULL)
+					Z_Free(map_icon_data);
+				map_icon_data = NULL;
+				map_icon_request_count = 0;
+			}
 		}
 
 		// Only ESC and non-keyboard keys abort connection
@@ -2805,6 +2949,17 @@ static void CL_ConnectToServer(void)
 		 serverlist[i].info.version, serverlist[i].info.subversion);
 	}
 	SL_ClearServerList(servernode);
+
+	if (map_icon_data != NULL)
+		Z_Free(map_icon_data);
+	if (map_icon != NULL)
+		Patch_Free(map_icon);
+	map_icon_data = Z_Malloc(MAP_ICON_WIDTH * MAP_ICON_HEIGHT, PU_CACHE, NULL);
+	map_icon_index = 0;
+	map_icon_needed = 0xff;
+	map_icon_read = 0;
+	map_icon_missing = 0xffffffff;
+	map_icon_last_request = I_GetTime();
 #endif
 
 	do
@@ -4690,7 +4845,7 @@ static void HandleConnect(SINT8 node)
 			connectedplayers++;
 
 #ifdef SATURNJOIN
-	const boolean issaturn = (((doomcom->datalength-BASEPACKETSIZE) == sizeof(clientconfig_pak)) && netbuffer->u.clientcfg.issaturn == ISSATURN); // Check the packet lenght to skip potential garbo data!
+	const boolean issaturn = (((doomcom->datalength) == sizeof(clientconfig_pak)) && netbuffer->u.clientcfg.issaturn == ISSATURN); // Check the packet lenght to skip potential garbo data!
 #endif
 
 	if (bannednode && bannednode[node].banid != SIZE_MAX)
@@ -4860,17 +5015,6 @@ static void HandleTimeout(SINT8 node)
 	M_StartMessage(M_GetText("Server Timeout\n\nPress Esc\n"), NULL, MM_NOTHING);
 }
 
-// Helper function for packets that should only be sent by the server
-// If it is NOT from the server, bail out and close the connection!
-static boolean ServerOnly(SINT8 node)
-{
-	if (node == servernode)
-		return false;
-
-	Net_CloseConnection(node);
-	return true;
-}
-
 #ifndef NONET
 /** Called when a PT_SERVERINFO packet is received
   *
@@ -4910,6 +5054,115 @@ static void HandlePlayerInfo(void)
 		playerinfo[i] = netbuffer->u.playerinfo[i];
 }
 
+// Helper function for packets that should only be sent by the server
+// If it is NOT from the server, bail out and close the connection!
+static boolean ServerOnly(SINT8 node)
+{
+	if (node == servernode)
+		return false;
+
+	Net_CloseConnection(node);
+	return true;
+}
+
+static void PT_MapIcon(void)
+{
+	if (map_icon_data == NULL)
+		return;
+
+	if (ServerOnly(doomcom->remotenode))
+		return;
+
+	doomdata_t *netbuffer = DOOMCOM_DATA(doomcom);
+
+	UINT8 *icondata = netbuffer->u.mapicondata;
+
+	map_icon_last_request = I_GetTime();
+	map_icon_request_count = 0;
+
+	UINT8 index = READUINT8(icondata);
+	if (index & 0x80)
+		map_icon_needed = (index & 0x7f) + 1;
+	index &= 0x7f;
+
+	// check if we already got this fragment
+	if (map_icon_missing & ((UINT32)1 << index))
+	{
+		map_icon_missing &= ~((UINT32)1 << index);
+		INT32 offset = index * (MAXPACKETLENGTH-BASEPACKETSIZE-1);
+		if (offset + doomcom->datalength-1 > MAP_ICON_WIDTH * MAP_ICON_HEIGHT)
+		{
+			CONS_Alert(CONS_WARNING, "Excess amount of data for map icon (expected %d, got %d)\n", MAP_ICON_WIDTH * MAP_ICON_HEIGHT, offset + doomcom->datalength-1);
+			Z_Free(map_icon_data);
+			map_icon_data = NULL;
+			return;
+		}
+
+		READMEM(icondata, &map_icon_data[offset], doomcom->datalength-1);
+		map_icon_read += doomcom->datalength-1;
+		map_icon_index++;
+	}
+
+	if (map_icon_index >= map_icon_needed)
+	{
+		if (map_icon_read == 0)
+		{
+			// map has no icon
+			Z_Free(map_icon_data);
+			map_icon_data = NULL;
+			return;
+		}
+
+		UINT8 *data = Z_Malloc(MAP_ICON_WIDTH * MAP_ICON_HEIGHT, PU_STATIC, NULL);
+		z_stream stream;
+		stream.zalloc = NULL;
+		stream.zfree = NULL;
+		stream.opaque = NULL;
+		stream.next_in = map_icon_data;
+		stream.avail_in = map_icon_read;
+		if (inflateInit(&stream) != Z_OK)
+		{
+			CONS_Alert(CONS_WARNING, "Cannot decompress map icon, not enough memory\n");
+			Z_Free(data);
+			Z_Free(map_icon_data);
+			map_icon_data = NULL;
+			return;
+		}
+		stream.next_out = data;
+		stream.avail_out = MAP_ICON_WIDTH * MAP_ICON_HEIGHT;
+		if (inflate(&stream, Z_FINISH) != Z_STREAM_END)
+		{
+			CONS_Alert(CONS_WARNING, "Failed to decompress map icon, map icon is invalid or corrupted\n");
+			deflateEnd(&stream);
+			Z_Free(data);
+			Z_Free(map_icon_data);
+			map_icon_data = NULL;
+			return;
+		}
+		inflateEnd(&stream);
+		Z_Free(map_icon_data);
+		map_icon_data = NULL;
+
+		if (stream.total_out > MAP_ICON_WIDTH * MAP_ICON_HEIGHT)
+		{
+			CONS_Alert(CONS_WARNING, "Excess amount of data for map icon (expected %d, got %ld)\n", MAP_ICON_WIDTH * MAP_ICON_HEIGHT, stream.total_out);
+			Z_Free(data);
+			return;
+		}
+		else if (stream.total_out < MAP_ICON_WIDTH * MAP_ICON_HEIGHT)
+		{
+			CONS_Alert(CONS_WARNING, "Insufficient amount of data for map icon (expected %d, got %ld)\n", MAP_ICON_WIDTH * MAP_ICON_HEIGHT, stream.total_out);
+			Z_Free(data);
+			return;
+		}
+
+		//map_icon = Patch_CreateFromData(MAP_ICON_WIDTH, MAP_ICON_HEIGHT, data);
+		map_icon = (patch_t *)R_PixelsToPatch(data, MAP_ICON_WIDTH, MAP_ICON_HEIGHT, 0, 0, NULL);
+
+		Z_Free(data);
+	}
+}
+
 static void PT_TellFilesNeeded(SINT8 node)
 {
 	if (server && serverrunning)
@@ -4958,11 +5211,18 @@ static void PT_AskInfo(SINT8 node)
 		doomdata_t *netbuffer = DOOMCOM_DATA(doomcom);
 		SV_SendServerInfo(node, (tic_t)LONG(netbuffer->u.askinfo.time));
 		SV_SendPlayerInfo(node); // Send extra info
+		//SV_SendMapIcon(node); // idk i dont think we need this here
 	}
 
 	Net_CloseConnection(node);
 }
 
+static void PT_NeedMapIcon(SINT8 node)
+{
+	SV_SendMapIcon(node);
+	Net_CloseConnection(node);
+}
+
 // Negative response of client join request
 static void PT_ServerRefuse(SINT8 node)
 {
@@ -5223,6 +5483,12 @@ static void HandlePacketFromAwayNode(SINT8 node)
 		case PT_PLAYERINFO:
 			HandlePlayerInfo();
 			break;
+		case PT_MAPICON:
+			PT_MapIcon();
+			break;
+		case PT_NEEDMAPICON:
+			PT_NeedMapIcon(node);
+			break;
 		case PT_SERVERTICS:
 			// Do not remove my own server (we have just get a out of order packet)
 			if (node == servernode)
@@ -5511,10 +5777,10 @@ static void PT_TextCmd(INT32 netconsole, SINT8 node)
 
 		// ignore if the textcmd size var is actually larger than it should be
 		// BASEPACKETSIZE + 1 (for size) + textcmd[0] should == datalength
-		if (netbuffer->u.textcmd[0] > (size_t)doomcom->datalength-BASEPACKETSIZE-1)
+		if (netbuffer->u.textcmd[0] > (size_t)doomcom->datalength-1)
 		{
 			DEBFILE(va("GetPacket: Bad Textcmd packet size! (expected %d, actual %s, node %u, player %d)\n",
-					   netbuffer->u.textcmd[0], sizeu1((size_t)doomcom->datalength-BASEPACKETSIZE-1),
+					   netbuffer->u.textcmd[0], sizeu1((size_t)doomcom->datalength-1),
 					   node, netconsole));
 			Net_UnAcknowledgePacket(node);
 			return;

src/d_clisrv.h

@@ -120,6 +120,8 @@ typedef enum
 	PT_ISSATURN, 			// Saturn specific identifier packet
 #endif
 
+	PT_MAPICON,       // Send map image icon (gamespy).
+	PT_NEEDMAPICON,   // Request missed map icon (gamespy).
 	NUMPACKETTYPE
 } packettype_t;
 
@@ -513,6 +515,7 @@ typedef struct
 		INT32 filesneedednum;               //           4 bytes
 		filesneededconfig_pak filesneededcfg; //       ??? bytes
 		UINT32 pingtable[MAXPLAYERS+1];     //          68 bytes
+		UINT8 mapicondata[0];
 	} u; // This is needed to pack diff packet types data together
 } ATTRPACK doomdata_t;
 
@@ -564,7 +567,6 @@ typedef enum
 	KR_TIMEOUT, //Connection Timeout
 	KR_BAN, //Banned by server
 	KR_LEAVE, //Quit the game
-
 } kickreason_t;
 
 /* the max number of name changes in some time period */

src/d_net.c

@@ -1201,6 +1201,7 @@ boolean HGetPacket(void)
 			GotAcks();
 			continue;
 		}
+		doomcom->datalength -= BASEPACKETSIZE;
 		break;
 	}
 #endif // ifndef NONET

src/r_defs.h

@@ -25,6 +25,9 @@
 
 #include "screen.h" // MAXVIDWIDTH, MAXVIDHEIGHT
 
+#define MAP_ICON_WIDTH 160
+#define MAP_ICON_HEIGHT 100
+
 //
 // ClipWallSegment
 // Clips the given range of columns

src/r_patch.c

@@ -451,6 +451,124 @@ void *Patch_CreateGL(patch_t *patch)
 }
 #endif // HWRENDER
 
+//
+// R_MaskedFlatToPatch
+//
+// Convert raw pixels to a patch.
+//
+void *R_PixelsToPatch(UINT8 *raw, INT16 width, INT16 height, INT16 leftoffset, INT16 topoffset, size_t *destsize)
+{
+	INT16 x, y;
+	UINT8 *img;
+	UINT8 *imgptr = imgbuf;
+	UINT8 *colpointers, *startofspan;
+	size_t size = 0;
+
+	if (!raw)
+		return NULL;
+
+	// Write image size and offset
+	WRITEINT16(imgptr, width);
+	WRITEINT16(imgptr, height);
+	WRITEINT16(imgptr, leftoffset);
+	WRITEINT16(imgptr, topoffset);
+
+	// Leave placeholder to column pointers
+	colpointers = imgptr;
+	imgptr += width*4;
+
+	// Write columns
+	for (x = 0; x < width; x++)
+	{
+		int lastStartY = 0;
+		int spanSize = 0;
+		startofspan = NULL;
+
+		// Write column pointer
+		WRITEINT32(colpointers, imgptr - imgbuf);
+
+		// Write pixels
+		for (y = 0; y < height; y++)
+		{
+			UINT8 pixel = raw[((y * width) + x)];
+			UINT8 opaque = (pixel != 0xf7); // If not 247 (0xf7), we have a pixel
+
+			// End span if we have a transparent pixel
+			if (!opaque)
+			{
+				if (startofspan)
+					WRITEUINT8(imgptr, 0);
+				startofspan = NULL;
+				continue;
+			}
+
+			// Start new column if we need to
+			if (!startofspan || spanSize == 255)
+			{
+				int writeY = y;
+
+				// If we reached the span size limit, finish the previous span
+				if (startofspan)
+					WRITEUINT8(imgptr, 0);
+
+				if (y > 254)
+				{
+					// Make sure we're aligned to 254
+					if (lastStartY < 254)
+					{
+						WRITEUINT8(imgptr, 254);
+						WRITEUINT8(imgptr, 0);
+						imgptr += 2;
+						lastStartY = 254;
+					}
+
+					// Write stopgap empty spans if needed
+					writeY = y - lastStartY;
+
+					while (writeY > 254)
+					{
+						WRITEUINT8(imgptr, 254);
+						WRITEUINT8(imgptr, 0);
+						imgptr += 2;
+						writeY -= 254;
+					}
+				}
+
+				startofspan = imgptr;
+				WRITEUINT8(imgptr, writeY);
+				imgptr += 2;
+				spanSize = 0;
+
+				lastStartY = y;
+			}
+
+			// Write the pixel
+			WRITEUINT8(imgptr, pixel);
+			spanSize++;
+			startofspan[1] = spanSize;
+		}
+
+		if (startofspan)
+			WRITEUINT8(imgptr, 0);
+
+		WRITEUINT8(imgptr, 0xFF);
+	}
+
+	size = imgptr-imgbuf;
+	img = Z_Malloc(size, PU_STATIC, NULL);
+	memcpy(img, imgbuf, size);
+
+	if (destsize != NULL)
+		*destsize = size;
+
+	patch_t *converted = Patch_Create((softwarepatch_t *)img, size, NULL);
+#ifdef HWRENDER
+	Patch_CreateGL(converted);
+#endif
+	Z_Free(img);
+
+	return converted;
+}
 
 //
 // R_MaskedFlatToPatch
@@ -615,3 +733,44 @@ UINT16 R_GetPatchPixel(patch_t *patch, INT32 x, INT32 y, boolean flip)
 
 	return 0xFF00;
 }
+
+void R_PatchToPixels(patch_t *patch, UINT8 *dst)
+{
+	const INT16 width = patch->width;
+
+	// init out destination to cyan so we can easily check for it when we convert it back to a patch
+	memset(dst, 0xf7, (width * patch->height)); // should this be here or should this be taken care of before passing it?
+
+	for (INT32 x = 0; x < width; ++x)
+	{
+		INT32 y = 0;
+		INT32 prevdelta = -1;
+
+		column_t *column = (column_t *)((UINT8 *)patch->columns + (patch->columnofs[x]));
+
+		while (column->topdelta != 0xff)
+		{
+			INT32 topdelta = column->topdelta;
+
+			if (topdelta <= prevdelta)
+				topdelta += prevdelta;
+
+			prevdelta = topdelta;
+
+			for (; y-topdelta < column->length; ++y)
+			{
+				UINT8 pixel = 0;
+
+				if (y >= topdelta)
+				{
+					UINT8 *source = (UINT8*)(column) + 3;
+					pixel = source[y-topdelta];
+				}
+
+				dst[(y*width) + x] = pixel;
+			}
+
+			column = (column_t *)((UINT8 *)column + column->length + 4);
+		}
+	}
+}

src/r_patch.h

@@ -1,62 +1,64 @@
-// SONIC ROBO BLAST 2
-//-----------------------------------------------------------------------------
-// Copyright (C) 1993-1996 by id Software, Inc.
-// Copyright (C) 2018-2019 by Jaime "Lactozilla" Passos.
-// Copyright (C) 2019      by Sonic Team Junior.
-//
-// This program is free software distributed under the
-// terms of the GNU General Public License, version 2.
-// See the 'LICENSE' file for more details.
-//-----------------------------------------------------------------------------
-/// \file  r_patch.h
-/// \brief Patch generation.
-
-#ifndef __R_PATCH__
-#define __R_PATCH__
-
-#include "r_defs.h"
-
-// Structs
-typedef enum
-{
-	ROTAXIS_X, // Roll (the default)
-	ROTAXIS_Y, // Pitch
-	ROTAXIS_Z  // Yaw
-} rotaxis_t;
-
-typedef struct
-{
-	INT32 x, y;
-	rotaxis_t rotaxis;
-} spriteframepivot_t;
-
-typedef struct
-{
-	spriteframepivot_t pivot[64];
-	boolean available;
-} spriteinfo_t;
-
-// Patch functions
-patch_t *Patch_Create(softwarepatch_t *source, size_t srcsize, void *dest);
-void Patch_Free(patch_t *patch);
-
-#define Patch_FreeTag(tagnum) Patch_FreeTags(tagnum, tagnum)
-void Patch_FreeTags(INT32 lowtag, INT32 hightag);
-
-#ifdef HWRENDER
-void *Patch_AllocateHardwarePatch(patch_t *patch);
-void *Patch_CreateGL(patch_t *patch);
-#endif
-
-// Conversions between patches / flats / textures...
-boolean R_CheckIfPatch(lumpnum_t lump);
-
-// SpriteInfo
-extern spriteinfo_t spriteinfo[NUMSPRITES];
-void R_LoadSpriteInfoLumps(UINT16 wadnum, UINT16 numlumps);
-void R_ParseSPRTINFOLump(UINT16 wadNum, UINT16 lumpNum);
-
-void *R_MaskedFlatToPatch(UINT16 *raw, INT16 width, INT16 height, INT16 leftoffset, INT16 topoffset, size_t *destsize);
-UINT16 R_GetPatchPixel(patch_t *patch, INT32 x, INT32 y, boolean flip);
-
-#endif // __R_PATCH__
+// SONIC ROBO BLAST 2
+//-----------------------------------------------------------------------------
+// Copyright (C) 1993-1996 by id Software, Inc.
+// Copyright (C) 2018-2019 by Jaime "Lactozilla" Passos.
+// Copyright (C) 2019      by Sonic Team Junior.
+//
+// This program is free software distributed under the
+// terms of the GNU General Public License, version 2.
+// See the 'LICENSE' file for more details.
+//-----------------------------------------------------------------------------
+/// \file  r_patch.h
+/// \brief Patch generation.
+
+#ifndef __R_PATCH__
+#define __R_PATCH__
+
+#include "r_defs.h"
+
+// Structs
+typedef enum
+{
+	ROTAXIS_X, // Roll (the default)
+	ROTAXIS_Y, // Pitch
+	ROTAXIS_Z  // Yaw
+} rotaxis_t;
+
+typedef struct
+{
+	INT32 x, y;
+	rotaxis_t rotaxis;
+} spriteframepivot_t;
+
+typedef struct
+{
+	spriteframepivot_t pivot[64];
+	boolean available;
+} spriteinfo_t;
+
+// Patch functions
+patch_t *Patch_Create(softwarepatch_t *source, size_t srcsize, void *dest);
+void Patch_Free(patch_t *patch);
+
+#define Patch_FreeTag(tagnum) Patch_FreeTags(tagnum, tagnum)
+void Patch_FreeTags(INT32 lowtag, INT32 hightag);
+
+#ifdef HWRENDER
+void *Patch_AllocateHardwarePatch(patch_t *patch);
+void *Patch_CreateGL(patch_t *patch);
+#endif
+
+// Conversions between patches / flats / textures...
+boolean R_CheckIfPatch(lumpnum_t lump);
+
+// SpriteInfo
+extern spriteinfo_t spriteinfo[NUMSPRITES];
+void R_LoadSpriteInfoLumps(UINT16 wadnum, UINT16 numlumps);
+void R_ParseSPRTINFOLump(UINT16 wadNum, UINT16 lumpNum);
+
+void *R_MaskedFlatToPatch(UINT16 *raw, INT16 width, INT16 height, INT16 leftoffset, INT16 topoffset, size_t *destsize);
+void *R_PixelsToPatch(UINT8 *raw, INT16 width, INT16 height, INT16 leftoffset, INT16 topoffset, size_t *destsize);
+UINT16 R_GetPatchPixel(patch_t *patch, INT32 x, INT32 y, boolean flip);
+void R_PatchToPixels(patch_t *patch, UINT8 *dst); // Important: dst must have enough space for patch->width*patch->height pixels!
+
+#endif // __R_PATCH__