ref: 4cb20a815b8e763ecc30e882e3ec695452e2b835
dir: /src/heretic/r_draw.c/
// Emacs style mode select -*- C++ -*- //----------------------------------------------------------------------------- // // Copyright(C) 1993-1996 Id Software, Inc. // Copyright(C) 1993-2008 Raven Software // // 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 "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 + 255, PU_STATIC, 0); translationtables = (byte *) (((int) translationtables + 255) & ~255); // 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("FLOOR04", PU_CACHE); } else { src = W_CacheLumpName("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("bordt", PU_CACHE)); V_DrawPatch(x, viewwindowy + viewheight, W_CacheLumpName("bordb", PU_CACHE)); } for (y = viewwindowy; y < viewwindowy + viewheight; y += 16) { V_DrawPatch(viewwindowx - 4, y, W_CacheLumpName("bordl", PU_CACHE)); V_DrawPatch(viewwindowx + viewwidth, y, W_CacheLumpName("bordr", PU_CACHE)); } V_DrawPatch(viewwindowx - 4, viewwindowy - 4, W_CacheLumpName("bordtl", PU_CACHE)); V_DrawPatch(viewwindowx + viewwidth, viewwindowy - 4, W_CacheLumpName("bordtr", PU_CACHE)); V_DrawPatch(viewwindowx + viewwidth, viewwindowy + viewheight, W_CacheLumpName("bordbr", PU_CACHE)); V_DrawPatch(viewwindowx - 4, viewwindowy + viewheight, W_CacheLumpName("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("FLOOR04", PU_CACHE); } else { src = W_CacheLumpName("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("bordt", PU_CACHE)); } V_DrawPatch(viewwindowx - 4, viewwindowy, W_CacheLumpName("bordl", PU_CACHE)); V_DrawPatch(viewwindowx + viewwidth, viewwindowy, W_CacheLumpName("bordr", PU_CACHE)); V_DrawPatch(viewwindowx - 4, viewwindowy + 16, W_CacheLumpName("bordl", PU_CACHE)); V_DrawPatch(viewwindowx + viewwidth, viewwindowy + 16, W_CacheLumpName("bordr", PU_CACHE)); V_DrawPatch(viewwindowx - 4, viewwindowy - 4, W_CacheLumpName("bordtl", PU_CACHE)); V_DrawPatch(viewwindowx + viewwidth, viewwindowy - 4, W_CacheLumpName("bordtr", PU_CACHE)); } }