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-rw-r--r--src/hexen/r_data.c708
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diff --git a/src/hexen/r_data.c b/src/hexen/r_data.c
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+// Emacs style mode select -*- C++ -*-
+//-----------------------------------------------------------------------------
+//
+// Copyright(C) 1993-1996 Id Software, Inc.
+// Copyright(C) 1993-2008 Raven Software
+// Copyright(C) 2008 Simon Howard
+//
+// 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.
+//
+//-----------------------------------------------------------------------------
+
+
+#include "h2def.h"
+#include "i_system.h"
+#include "i_swap.h"
+#include "r_local.h"
+#include "p_local.h"
+
+typedef struct
+{
+ int originx; // block origin (allways UL), which has allready
+ int originy; // accounted for the patch's internal origin
+ int patch;
+} texpatch_t;
+
+// a maptexturedef_t describes a rectangular texture, which is composed of one
+// or more mappatch_t structures that arrange graphic patches
+typedef struct
+{
+ char name[8]; // for switch changing, etc
+ short width;
+ short height;
+ short patchcount;
+ texpatch_t patches[1]; // [patchcount] drawn back to front
+ // into the cached texture
+} texture_t;
+
+
+
+int firstflat, lastflat, numflats;
+int firstpatch, lastpatch, numpatches;
+int firstspritelump, lastspritelump, numspritelumps;
+
+int numtextures;
+texture_t **textures;
+int *texturewidthmask;
+fixed_t *textureheight; // needed for texture pegging
+int *texturecompositesize;
+short **texturecolumnlump;
+unsigned short **texturecolumnofs;
+byte **texturecomposite;
+
+int *flattranslation; // for global animation
+int *texturetranslation; // for global animation
+
+fixed_t *spritewidth; // needed for pre rendering
+fixed_t *spriteoffset;
+fixed_t *spritetopoffset;
+
+lighttable_t *colormaps;
+
+
+/*
+==============================================================================
+
+ MAPTEXTURE_T CACHING
+
+when a texture is first needed, it counts the number of composite columns
+required in the texture and allocates space for a column directory and any
+new columns. The directory will simply point inside other patches if there
+is only one patch in a given column, but any columns with multiple patches
+will have new column_ts generated.
+
+==============================================================================
+*/
+
+/*
+===================
+=
+= R_DrawColumnInCache
+=
+= Clip and draw a column from a patch into a cached post
+=
+===================
+*/
+
+void R_DrawColumnInCache(column_t * patch, byte * cache, int originy,
+ int cacheheight)
+{
+ int count, position;
+ byte *source, *dest;
+
+ dest = (byte *) cache + 3;
+
+ while (patch->topdelta != 0xff)
+ {
+ source = (byte *) patch + 3;
+ count = patch->length;
+ position = originy + patch->topdelta;
+ if (position < 0)
+ {
+ count += position;
+ position = 0;
+ }
+ if (position + count > cacheheight)
+ count = cacheheight - position;
+ if (count > 0)
+ memcpy(cache + position, source, count);
+
+ patch = (column_t *) ((byte *) patch + patch->length + 4);
+ }
+}
+
+
+/*
+===================
+=
+= R_GenerateComposite
+=
+===================
+*/
+
+void R_GenerateComposite(int texnum)
+{
+ byte *block;
+ texture_t *texture;
+ texpatch_t *patch;
+ patch_t *realpatch;
+ int x, x1, x2;
+ int i;
+ column_t *patchcol;
+ short *collump;
+ unsigned short *colofs;
+
+ texture = textures[texnum];
+ block = Z_Malloc(texturecompositesize[texnum], PU_STATIC,
+ &texturecomposite[texnum]);
+ collump = texturecolumnlump[texnum];
+ colofs = texturecolumnofs[texnum];
+
+//
+// composite the columns together
+//
+ patch = texture->patches;
+
+ for (i = 0, patch = texture->patches; i < texture->patchcount;
+ i++, patch++)
+ {
+ realpatch = W_CacheLumpNum(patch->patch, PU_CACHE);
+ x1 = patch->originx;
+ x2 = x1 + SHORT(realpatch->width);
+
+ if (x1 < 0)
+ x = 0;
+ else
+ x = x1;
+ if (x2 > texture->width)
+ x2 = texture->width;
+
+ for (; x < x2; x++)
+ {
+ if (collump[x] >= 0)
+ continue; // column does not have multiple patches
+ patchcol = (column_t *) ((byte *) realpatch +
+ LONG(realpatch->columnofs[x - x1]));
+ R_DrawColumnInCache(patchcol, block + colofs[x], patch->originy,
+ texture->height);
+ }
+
+ }
+
+// now that the texture has been built, it is purgable
+ Z_ChangeTag(block, PU_CACHE);
+}
+
+
+/*
+===================
+=
+= R_GenerateLookup
+=
+===================
+*/
+
+void R_GenerateLookup(int texnum)
+{
+ texture_t *texture;
+ byte *patchcount; // [texture->width]
+ texpatch_t *patch;
+ patch_t *realpatch;
+ int x, x1, x2;
+ int i;
+ short *collump;
+ unsigned short *colofs;
+
+ texture = textures[texnum];
+
+ texturecomposite[texnum] = 0; // composited not created yet
+ texturecompositesize[texnum] = 0;
+ collump = texturecolumnlump[texnum];
+ colofs = texturecolumnofs[texnum];
+
+//
+// count the number of columns that are covered by more than one patch
+// fill in the lump / offset, so columns with only a single patch are
+// all done
+//
+ patchcount = (byte *) Z_Malloc(texture->width, PU_STATIC, &patchcount);
+ memset(patchcount, 0, texture->width);
+ patch = texture->patches;
+
+ for (i = 0, patch = texture->patches; i < texture->patchcount;
+ i++, patch++)
+ {
+ realpatch = W_CacheLumpNum(patch->patch, PU_CACHE);
+ x1 = patch->originx;
+ x2 = x1 + SHORT(realpatch->width);
+ if (x1 < 0)
+ x = 0;
+ else
+ x = x1;
+ if (x2 > texture->width)
+ x2 = texture->width;
+ for (; x < x2; x++)
+ {
+ patchcount[x]++;
+ collump[x] = patch->patch;
+ colofs[x] = LONG(realpatch->columnofs[x - x1]) + 3;
+ }
+ }
+
+ for (x = 0; x < texture->width; x++)
+ {
+ if (!patchcount[x])
+ {
+ ST_Message("R_GenerateLookup: column without a patch (%s)\n",
+ texture->name);
+ return;
+ }
+// I_Error ("R_GenerateLookup: column without a patch");
+ if (patchcount[x] > 1)
+ {
+ collump[x] = -1; // use the cached block
+ colofs[x] = texturecompositesize[texnum];
+ if (texturecompositesize[texnum] > 0x10000 - texture->height)
+ I_Error("R_GenerateLookup: texture %i is >64k", texnum);
+ texturecompositesize[texnum] += texture->height;
+ }
+ }
+
+ Z_Free(patchcount);
+}
+
+
+/*
+================
+=
+= R_GetColumn
+=
+================
+*/
+
+byte *R_GetColumn(int tex, int col)
+{
+ int lump, ofs;
+
+ col &= texturewidthmask[tex];
+ lump = texturecolumnlump[tex][col];
+ ofs = texturecolumnofs[tex][col];
+ if (lump > 0)
+ return (byte *) W_CacheLumpNum(lump, PU_CACHE) + ofs;
+ if (!texturecomposite[tex])
+ R_GenerateComposite(tex);
+ return texturecomposite[tex] + ofs;
+}
+
+
+/*
+==================
+=
+= R_InitTextures
+=
+= Initializes the texture list with the textures from the world map
+=
+==================
+*/
+
+void R_InitTextures(void)
+{
+ maptexture_t *mtexture;
+ texture_t *texture;
+ mappatch_t *mpatch;
+ texpatch_t *patch;
+ int i, j;
+ int *maptex, *maptex2, *maptex1;
+ char name[9], *names, *name_p;
+ int *patchlookup;
+ int totalwidth;
+ int nummappatches;
+ int offset, maxoff, maxoff2;
+ int numtextures1, numtextures2;
+ int *directory;
+
+//
+// load the patch names from pnames.lmp
+//
+ name[8] = 0;
+ names = W_CacheLumpName("PNAMES", PU_STATIC);
+ nummappatches = LONG(*((int *) names));
+ name_p = names + 4;
+ patchlookup = Z_Malloc(nummappatches * sizeof(*patchlookup), PU_STATIC, NULL);
+ for (i = 0; i < nummappatches; i++)
+ {
+ strncpy(name, name_p + i * 8, 8);
+ patchlookup[i] = W_CheckNumForName(name);
+ }
+ W_ReleaseLumpName("PNAMES");
+
+//
+// load the map texture definitions from textures.lmp
+//
+ maptex = maptex1 = W_CacheLumpName("TEXTURE1", PU_STATIC);
+ numtextures1 = LONG(*maptex);
+ maxoff = W_LumpLength(W_GetNumForName("TEXTURE1"));
+ directory = maptex + 1;
+
+ if (W_CheckNumForName("TEXTURE2") != -1)
+ {
+ maptex2 = W_CacheLumpName("TEXTURE2", PU_STATIC);
+ numtextures2 = LONG(*maptex2);
+ maxoff2 = W_LumpLength(W_GetNumForName("TEXTURE2"));
+ }
+ else
+ {
+ maptex2 = NULL;
+ numtextures2 = 0;
+ maxoff2 = 0;
+ }
+ numtextures = numtextures1 + numtextures2;
+
+ textures = Z_Malloc(numtextures * sizeof(texture_t *), PU_STATIC, 0);
+ texturecolumnlump = Z_Malloc(numtextures * sizeof(short *), PU_STATIC, 0);
+ texturecolumnofs = Z_Malloc(numtextures * sizeof(short *), PU_STATIC, 0);
+ texturecomposite = Z_Malloc(numtextures * sizeof(byte *), PU_STATIC, 0);
+ texturecompositesize = Z_Malloc(numtextures * sizeof(int), PU_STATIC, 0);
+ texturewidthmask = Z_Malloc(numtextures * sizeof(int), PU_STATIC, 0);
+ textureheight = Z_Malloc(numtextures * sizeof(fixed_t), PU_STATIC, 0);
+
+ totalwidth = 0;
+
+ for (i = 0; i < numtextures; i++, directory++)
+ {
+ if (i == numtextures1)
+ { // start looking in second texture file
+ maptex = maptex2;
+ maxoff = maxoff2;
+ directory = maptex + 1;
+ }
+
+ offset = LONG(*directory);
+ if (offset > maxoff)
+ I_Error("R_InitTextures: bad texture directory");
+ mtexture = (maptexture_t *) ((byte *) maptex + offset);
+ texture = textures[i] = Z_Malloc(sizeof(texture_t)
+ +
+ sizeof(texpatch_t) *
+ (SHORT(mtexture->patchcount) - 1),
+ PU_STATIC, 0);
+ texture->width = SHORT(mtexture->width);
+ texture->height = SHORT(mtexture->height);
+ texture->patchcount = SHORT(mtexture->patchcount);
+ memcpy(texture->name, mtexture->name, sizeof(texture->name));
+ mpatch = &mtexture->patches[0];
+ patch = &texture->patches[0];
+ for (j = 0; j < texture->patchcount; j++, mpatch++, patch++)
+ {
+ patch->originx = SHORT(mpatch->originx);
+ patch->originy = SHORT(mpatch->originy);
+ patch->patch = patchlookup[SHORT(mpatch->patch)];
+ if (patch->patch == -1)
+ I_Error("R_InitTextures: Missing patch in texture %s",
+ texture->name);
+ }
+ texturecolumnlump[i] = Z_Malloc(texture->width * sizeof(short), PU_STATIC, 0);
+ texturecolumnofs[i] = Z_Malloc(texture->width * sizeof(short), PU_STATIC, 0);
+ j = 1;
+ while (j * 2 <= texture->width)
+ j <<= 1;
+ texturewidthmask[i] = j - 1;
+ textureheight[i] = texture->height << FRACBITS;
+
+ totalwidth += texture->width;
+ }
+
+ Z_Free(patchlookup);
+
+ W_ReleaseLumpName("TEXTURE1");
+ if (maptex2)
+ W_ReleaseLumpName("TEXTURE2");
+
+//
+// precalculate whatever possible
+//
+ for (i = 0; i < numtextures; i++)
+ {
+ R_GenerateLookup(i);
+ if (!(i & 31))
+ ST_Progress();
+ }
+
+//
+// translation table for global animation
+//
+ texturetranslation = Z_Malloc((numtextures + 1) * sizeof(int), PU_STATIC, 0);
+ for (i = 0; i < numtextures; i++)
+ texturetranslation[i] = i;
+}
+
+
+/*
+================
+=
+= R_InitFlats
+=
+=================
+*/
+
+void R_InitFlats(void)
+{
+ int i;
+
+ firstflat = W_GetNumForName("F_START") + 1;
+ lastflat = W_GetNumForName("F_END") - 1;
+ numflats = lastflat - firstflat + 1;
+
+// translation table for global animation
+ flattranslation = Z_Malloc((numflats + 1) * sizeof(int), PU_STATIC, 0);
+ for (i = 0; i < numflats; i++)
+ flattranslation[i] = i;
+}
+
+
+/*
+================
+=
+= R_InitSpriteLumps
+=
+= Finds the width and hoffset of all sprites in the wad, so the sprite doesn't
+= need to be cached just for the header during rendering
+=================
+*/
+
+void R_InitSpriteLumps(void)
+{
+ int i;
+ patch_t *patch;
+
+ firstspritelump = W_GetNumForName("S_START") + 1;
+ lastspritelump = W_GetNumForName("S_END") - 1;
+ numspritelumps = lastspritelump - firstspritelump + 1;
+ spritewidth = Z_Malloc(numspritelumps * sizeof(fixed_t), PU_STATIC, 0);
+ spriteoffset = Z_Malloc(numspritelumps * sizeof(fixed_t), PU_STATIC, 0);
+ spritetopoffset = Z_Malloc(numspritelumps * sizeof(fixed_t), PU_STATIC, 0);
+
+ for (i = 0; i < numspritelumps; i++)
+ {
+ if (!(i & 127))
+ ST_Progress();
+ patch = W_CacheLumpNum(firstspritelump + i, PU_CACHE);
+ spritewidth[i] = SHORT(patch->width) << FRACBITS;
+ spriteoffset[i] = SHORT(patch->leftoffset) << FRACBITS;
+ spritetopoffset[i] = SHORT(patch->topoffset) << FRACBITS;
+ }
+}
+
+
+/*
+================
+=
+= R_InitColormaps
+=
+=================
+*/
+
+void R_InitColormaps(void)
+{
+ int lump, length;
+//
+// load in the light tables
+// 256 byte align tables
+//
+ lump = W_GetNumForName("COLORMAP");
+ length = W_LumpLength(lump);
+ colormaps = Z_Malloc(length, PU_STATIC, 0);
+ W_ReadLump(lump, colormaps);
+}
+
+
+/*
+================
+=
+= R_InitData
+=
+= Locates all the lumps that will be used by all views
+= Must be called after W_Init
+=================
+*/
+
+void R_InitData(void)
+{
+ R_InitTextures();
+ R_InitFlats();
+ R_InitSpriteLumps();
+ R_InitColormaps();
+}
+
+//=============================================================================
+
+/*
+================
+=
+= R_FlatNumForName
+=
+================
+*/
+
+int R_FlatNumForName(char *name)
+{
+ int i;
+ char namet[9];
+
+ i = W_CheckNumForName(name);
+ if (i == -1)
+ {
+ namet[8] = 0;
+ memcpy(namet, name, 8);
+ I_Error("R_FlatNumForName: %s not found", namet);
+ }
+ return i - firstflat;
+}
+
+
+/*
+================
+=
+= R_CheckTextureNumForName
+=
+================
+*/
+
+int R_CheckTextureNumForName(char *name)
+{
+ int i;
+
+ if (name[0] == '-') // no texture marker
+ return 0;
+
+ for (i = 0; i < numtextures; i++)
+ if (!strncasecmp(textures[i]->name, name, 8))
+ return i;
+
+ return -1;
+}
+
+
+/*
+================
+=
+= R_TextureNumForName
+=
+================
+*/
+
+int R_TextureNumForName(char *name)
+{
+ int i;
+ //char namet[9];
+
+ i = R_CheckTextureNumForName(name);
+ if (i == -1)
+ I_Error("R_TextureNumForName: %s not found", name);
+
+ return i;
+}
+
+
+/*
+=================
+=
+= R_PrecacheLevel
+=
+= Preloads all relevent graphics for the level
+=================
+*/
+
+int flatmemory, texturememory, spritememory;
+
+void R_PrecacheLevel(void)
+{
+ char *flatpresent;
+ char *texturepresent;
+ char *spritepresent;
+ int i, j, k, lump;
+ texture_t *texture;
+ thinker_t *th;
+ spriteframe_t *sf;
+
+ if (demoplayback)
+ return;
+
+//
+// precache flats
+//
+ flatpresent = Z_Malloc(numflats, PU_STATIC, NULL);
+ memset(flatpresent, 0, numflats);
+ for (i = 0; i < numsectors; i++)
+ {
+ flatpresent[sectors[i].floorpic] = 1;
+ flatpresent[sectors[i].ceilingpic] = 1;
+ }
+
+ flatmemory = 0;
+ for (i = 0; i < numflats; i++)
+ if (flatpresent[i])
+ {
+ lump = firstflat + i;
+ flatmemory += lumpinfo[lump].size;
+ W_CacheLumpNum(lump, PU_CACHE);
+ }
+
+ Z_Free(flatpresent);
+
+//
+// precache textures
+//
+ texturepresent = Z_Malloc(numtextures, PU_STATIC, NULL);
+ memset(texturepresent, 0, numtextures);
+
+ for (i = 0; i < numsides; i++)
+ {
+ texturepresent[sides[i].toptexture] = 1;
+ texturepresent[sides[i].midtexture] = 1;
+ texturepresent[sides[i].bottomtexture] = 1;
+ }
+
+ texturepresent[Sky1Texture] = 1;
+ texturepresent[Sky2Texture] = 1;
+
+ texturememory = 0;
+ for (i = 0; i < numtextures; i++)
+ {
+ if (!texturepresent[i])
+ continue;
+ texture = textures[i];
+ for (j = 0; j < texture->patchcount; j++)
+ {
+ lump = texture->patches[j].patch;
+ texturememory += lumpinfo[lump].size;
+ W_CacheLumpNum(lump, PU_CACHE);
+ }
+ }
+
+ Z_Free(texturepresent);
+
+//
+// precache sprites
+//
+ spritepresent = Z_Malloc(numsprites, PU_STATIC, NULL);
+ memset(spritepresent, 0, numsprites);
+
+ for (th = thinkercap.next; th != &thinkercap; th = th->next)
+ {
+ if (th->function == P_MobjThinker)
+ spritepresent[((mobj_t *) th)->sprite] = 1;
+ }
+
+ spritememory = 0;
+ for (i = 0; i < numsprites; i++)
+ {
+ if (!spritepresent[i])
+ continue;
+ for (j = 0; j < sprites[i].numframes; j++)
+ {
+ sf = &sprites[i].spriteframes[j];
+ for (k = 0; k < 8; k++)
+ {
+ lump = firstspritelump + sf->lump[k];
+ spritememory += lumpinfo[lump].size;
+ W_CacheLumpNum(lump, PU_CACHE);
+ }
+ }
+ }
+
+ Z_Free(spritepresent);
+}
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