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-rw-r--r--src/heretic/r_draw.c498
1 files changed, 498 insertions, 0 deletions
diff --git a/src/heretic/r_draw.c b/src/heretic/r_draw.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.
+//
+//-----------------------------------------------------------------------------
+// R_draw.c
+
+#include "doomdef.h"
+#include "deh_str.h"
+#include "r_local.h"
+#include "i_video.h"
+#include "v_video.h"
+
+/*
+
+All drawing to the view buffer is accomplished in this file. The other refresh
+files only know about ccordinates, not the architecture of the frame buffer.
+
+*/
+
+byte *viewimage;
+int viewwidth, scaledviewwidth, viewheight, viewwindowx, viewwindowy;
+byte *ylookup[MAXHEIGHT];
+int columnofs[MAXWIDTH];
+byte translations[3][256]; // color tables for different players
+
+/*
+==================
+=
+= R_DrawColumn
+=
+= Source is the top of the column to scale
+=
+==================
+*/
+
+lighttable_t *dc_colormap;
+int dc_x;
+int dc_yl;
+int dc_yh;
+fixed_t dc_iscale;
+fixed_t dc_texturemid;
+byte *dc_source; // first pixel in a column (possibly virtual)
+
+int dccount; // just for profiling
+
+void R_DrawColumn(void)
+{
+ int count;
+ byte *dest;
+ fixed_t frac, fracstep;
+
+ count = dc_yh - dc_yl;
+ if (count < 0)
+ return;
+
+#ifdef RANGECHECK
+ if ((unsigned) dc_x >= SCREENWIDTH || dc_yl < 0 || dc_yh >= SCREENHEIGHT)
+ I_Error("R_DrawColumn: %i to %i at %i", dc_yl, dc_yh, dc_x);
+#endif
+
+ dest = ylookup[dc_yl] + columnofs[dc_x];
+
+ fracstep = dc_iscale;
+ frac = dc_texturemid + (dc_yl - centery) * fracstep;
+
+ do
+ {
+ *dest = dc_colormap[dc_source[(frac >> FRACBITS) & 127]];
+ dest += SCREENWIDTH;
+ frac += fracstep;
+ }
+ while (count--);
+}
+
+void R_DrawColumnLow(void)
+{
+ int count;
+ byte *dest;
+ fixed_t frac, fracstep;
+
+ count = dc_yh - dc_yl;
+ if (count < 0)
+ return;
+
+#ifdef RANGECHECK
+ if ((unsigned) dc_x >= SCREENWIDTH || dc_yl < 0 || dc_yh >= SCREENHEIGHT)
+ I_Error("R_DrawColumn: %i to %i at %i", dc_yl, dc_yh, dc_x);
+// dccount++;
+#endif
+
+ dest = ylookup[dc_yl] + columnofs[dc_x];
+
+ fracstep = dc_iscale;
+ frac = dc_texturemid + (dc_yl - centery) * fracstep;
+
+ do
+ {
+ *dest = dc_colormap[dc_source[(frac >> FRACBITS) & 127]];
+ dest += SCREENWIDTH;
+ frac += fracstep;
+ }
+ while (count--);
+}
+
+// Translucent column draw - blended with background using tinttable.
+
+void R_DrawTLColumn(void)
+{
+ int count;
+ byte *dest;
+ fixed_t frac, fracstep;
+
+ if (!dc_yl)
+ dc_yl = 1;
+ if (dc_yh == viewheight - 1)
+ dc_yh = viewheight - 2;
+
+ count = dc_yh - dc_yl;
+ if (count < 0)
+ return;
+
+#ifdef RANGECHECK
+ if ((unsigned) dc_x >= SCREENWIDTH || dc_yl < 0 || dc_yh >= SCREENHEIGHT)
+ I_Error("R_DrawTLColumn: %i to %i at %i", dc_yl, dc_yh, dc_x);
+#endif
+
+ dest = ylookup[dc_yl] + columnofs[dc_x];
+
+ fracstep = dc_iscale;
+ frac = dc_texturemid + (dc_yl - centery) * fracstep;
+
+ do
+ {
+ *dest =
+ tinttable[((*dest) << 8) +
+ dc_colormap[dc_source[(frac >> FRACBITS) & 127]]];
+
+ dest += SCREENWIDTH;
+ frac += fracstep;
+ }
+ while (count--);
+}
+
+/*
+========================
+=
+= R_DrawTranslatedColumn
+=
+========================
+*/
+
+byte *dc_translation;
+byte *translationtables;
+
+void R_DrawTranslatedColumn(void)
+{
+ int count;
+ byte *dest;
+ fixed_t frac, fracstep;
+
+ count = dc_yh - dc_yl;
+ if (count < 0)
+ return;
+
+#ifdef RANGECHECK
+ if ((unsigned) dc_x >= SCREENWIDTH || dc_yl < 0 || dc_yh >= SCREENHEIGHT)
+ I_Error("R_DrawColumn: %i to %i at %i", dc_yl, dc_yh, dc_x);
+#endif
+
+ dest = ylookup[dc_yl] + columnofs[dc_x];
+
+ fracstep = dc_iscale;
+ frac = dc_texturemid + (dc_yl - centery) * fracstep;
+
+ do
+ {
+ *dest = dc_colormap[dc_translation[dc_source[frac >> FRACBITS]]];
+ dest += SCREENWIDTH;
+ frac += fracstep;
+ }
+ while (count--);
+}
+
+void R_DrawTranslatedTLColumn(void)
+{
+ int count;
+ byte *dest;
+ fixed_t frac, fracstep;
+
+ count = dc_yh - dc_yl;
+ if (count < 0)
+ return;
+
+#ifdef RANGECHECK
+ if ((unsigned) dc_x >= SCREENWIDTH || dc_yl < 0 || dc_yh >= SCREENHEIGHT)
+ I_Error("R_DrawColumn: %i to %i at %i", dc_yl, dc_yh, dc_x);
+#endif
+
+ dest = ylookup[dc_yl] + columnofs[dc_x];
+
+ fracstep = dc_iscale;
+ frac = dc_texturemid + (dc_yl - centery) * fracstep;
+
+ do
+ {
+ *dest = tinttable[((*dest) << 8)
+ +
+ dc_colormap[dc_translation
+ [dc_source[frac >> FRACBITS]]]];
+ dest += SCREENWIDTH;
+ frac += fracstep;
+ }
+ while (count--);
+}
+
+//--------------------------------------------------------------------------
+//
+// PROC R_InitTranslationTables
+//
+//--------------------------------------------------------------------------
+
+void R_InitTranslationTables(void)
+{
+ int i;
+
+ V_LoadTintTable();
+
+ // Allocate translation tables
+ translationtables = Z_Malloc(256 * 3, PU_STATIC, 0);
+
+ // Fill out the translation tables
+ for (i = 0; i < 256; i++)
+ {
+ if (i >= 225 && i <= 240)
+ {
+ translationtables[i] = 114 + (i - 225); // yellow
+ translationtables[i + 256] = 145 + (i - 225); // red
+ translationtables[i + 512] = 190 + (i - 225); // blue
+ }
+ else
+ {
+ translationtables[i] = translationtables[i + 256]
+ = translationtables[i + 512] = i;
+ }
+ }
+}
+
+/*
+================
+=
+= R_DrawSpan
+=
+================
+*/
+
+int ds_y;
+int ds_x1;
+int ds_x2;
+lighttable_t *ds_colormap;
+fixed_t ds_xfrac;
+fixed_t ds_yfrac;
+fixed_t ds_xstep;
+fixed_t ds_ystep;
+byte *ds_source; // start of a 64*64 tile image
+
+int dscount; // just for profiling
+
+void R_DrawSpan(void)
+{
+ fixed_t xfrac, yfrac;
+ byte *dest;
+ int count, spot;
+
+#ifdef RANGECHECK
+ if (ds_x2 < ds_x1 || ds_x1 < 0 || ds_x2 >= SCREENWIDTH
+ || (unsigned) ds_y > SCREENHEIGHT)
+ I_Error("R_DrawSpan: %i to %i at %i", ds_x1, ds_x2, ds_y);
+// dscount++;
+#endif
+
+ xfrac = ds_xfrac;
+ yfrac = ds_yfrac;
+
+ dest = ylookup[ds_y] + columnofs[ds_x1];
+ count = ds_x2 - ds_x1;
+ do
+ {
+ spot = ((yfrac >> (16 - 6)) & (63 * 64)) + ((xfrac >> 16) & 63);
+ *dest++ = ds_colormap[ds_source[spot]];
+ xfrac += ds_xstep;
+ yfrac += ds_ystep;
+ }
+ while (count--);
+}
+
+void R_DrawSpanLow(void)
+{
+ fixed_t xfrac, yfrac;
+ byte *dest;
+ int count, spot;
+
+#ifdef RANGECHECK
+ if (ds_x2 < ds_x1 || ds_x1 < 0 || ds_x2 >= SCREENWIDTH
+ || (unsigned) ds_y > SCREENHEIGHT)
+ I_Error("R_DrawSpan: %i to %i at %i", ds_x1, ds_x2, ds_y);
+// dscount++;
+#endif
+
+ xfrac = ds_xfrac;
+ yfrac = ds_yfrac;
+
+ dest = ylookup[ds_y] + columnofs[ds_x1];
+ count = ds_x2 - ds_x1;
+ do
+ {
+ spot = ((yfrac >> (16 - 6)) & (63 * 64)) + ((xfrac >> 16) & 63);
+ *dest++ = ds_colormap[ds_source[spot]];
+ xfrac += ds_xstep;
+ yfrac += ds_ystep;
+ }
+ while (count--);
+}
+
+
+
+/*
+================
+=
+= R_InitBuffer
+=
+=================
+*/
+
+void R_InitBuffer(int width, int height)
+{
+ int i;
+
+ viewwindowx = (SCREENWIDTH - width) >> 1;
+ for (i = 0; i < width; i++)
+ columnofs[i] = viewwindowx + i;
+ if (width == SCREENWIDTH)
+ viewwindowy = 0;
+ else
+ viewwindowy = (SCREENHEIGHT - SBARHEIGHT - height) >> 1;
+ for (i = 0; i < height; i++)
+ ylookup[i] = I_VideoBuffer + (i + viewwindowy) * SCREENWIDTH;
+}
+
+
+/*
+==================
+=
+= R_DrawViewBorder
+=
+= Draws the border around the view for different size windows
+==================
+*/
+
+boolean BorderNeedRefresh;
+
+void R_DrawViewBorder(void)
+{
+ byte *src, *dest;
+ int x, y;
+
+ if (scaledviewwidth == SCREENWIDTH)
+ return;
+
+ if (gamemode == shareware)
+ {
+ src = W_CacheLumpName(DEH_String("FLOOR04"), PU_CACHE);
+ }
+ else
+ {
+ src = W_CacheLumpName(DEH_String("FLAT513"), PU_CACHE);
+ }
+ dest = I_VideoBuffer;
+
+ for (y = 0; y < SCREENHEIGHT - SBARHEIGHT; y++)
+ {
+ for (x = 0; x < SCREENWIDTH / 64; x++)
+ {
+ memcpy(dest, src + ((y & 63) << 6), 64);
+ dest += 64;
+ }
+ if (SCREENWIDTH & 63)
+ {
+ memcpy(dest, src + ((y & 63) << 6), SCREENWIDTH & 63);
+ dest += (SCREENWIDTH & 63);
+ }
+ }
+ for (x = viewwindowx; x < viewwindowx + viewwidth; x += 16)
+ {
+ V_DrawPatch(x, viewwindowy - 4,
+ W_CacheLumpName(DEH_String("bordt"), PU_CACHE));
+ V_DrawPatch(x, viewwindowy + viewheight,
+ W_CacheLumpName(DEH_String("bordb"), PU_CACHE));
+ }
+ for (y = viewwindowy; y < viewwindowy + viewheight; y += 16)
+ {
+ V_DrawPatch(viewwindowx - 4, y,
+ W_CacheLumpName(DEH_String("bordl"), PU_CACHE));
+ V_DrawPatch(viewwindowx + viewwidth, y,
+ W_CacheLumpName(DEH_String("bordr"), PU_CACHE));
+ }
+ V_DrawPatch(viewwindowx - 4, viewwindowy - 4,
+ W_CacheLumpName(DEH_String("bordtl"), PU_CACHE));
+ V_DrawPatch(viewwindowx + viewwidth, viewwindowy - 4,
+ W_CacheLumpName(DEH_String("bordtr"), PU_CACHE));
+ V_DrawPatch(viewwindowx + viewwidth, viewwindowy + viewheight,
+ W_CacheLumpName(DEH_String("bordbr"), PU_CACHE));
+ V_DrawPatch(viewwindowx - 4, viewwindowy + viewheight,
+ W_CacheLumpName(DEH_String("bordbl"), PU_CACHE));
+}
+
+/*
+==================
+=
+= R_DrawTopBorder
+=
+= Draws the top border around the view for different size windows
+==================
+*/
+
+boolean BorderTopRefresh;
+
+void R_DrawTopBorder(void)
+{
+ byte *src, *dest;
+ int x, y;
+
+ if (scaledviewwidth == SCREENWIDTH)
+ return;
+
+ if (gamemode == shareware)
+ {
+ src = W_CacheLumpName(DEH_String("FLOOR04"), PU_CACHE);
+ }
+ else
+ {
+ src = W_CacheLumpName(DEH_String("FLAT513"), PU_CACHE);
+ }
+ dest = I_VideoBuffer;
+
+ for (y = 0; y < 30; y++)
+ {
+ for (x = 0; x < SCREENWIDTH / 64; x++)
+ {
+ memcpy(dest, src + ((y & 63) << 6), 64);
+ dest += 64;
+ }
+ if (SCREENWIDTH & 63)
+ {
+ memcpy(dest, src + ((y & 63) << 6), SCREENWIDTH & 63);
+ dest += (SCREENWIDTH & 63);
+ }
+ }
+ if (viewwindowy < 25)
+ {
+ for (x = viewwindowx; x < viewwindowx + viewwidth; x += 16)
+ {
+ V_DrawPatch(x, viewwindowy - 4,
+ W_CacheLumpName(DEH_String("bordt"), PU_CACHE));
+ }
+ V_DrawPatch(viewwindowx - 4, viewwindowy,
+ W_CacheLumpName(DEH_String("bordl"), PU_CACHE));
+ V_DrawPatch(viewwindowx + viewwidth, viewwindowy,
+ W_CacheLumpName(DEH_String("bordr"), PU_CACHE));
+ V_DrawPatch(viewwindowx - 4, viewwindowy + 16,
+ W_CacheLumpName(DEH_String("bordl"), PU_CACHE));
+ V_DrawPatch(viewwindowx + viewwidth, viewwindowy + 16,
+ W_CacheLumpName(DEH_String("bordr"), PU_CACHE));
+
+ V_DrawPatch(viewwindowx - 4, viewwindowy - 4,
+ W_CacheLumpName(DEH_String("bordtl"), PU_CACHE));
+ V_DrawPatch(viewwindowx + viewwidth, viewwindowy - 4,
+ W_CacheLumpName(DEH_String("bordtr"), PU_CACHE));
+ }
+}
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