mirror of
https://github.com/ZDoom/gzdoom-gles.git
synced 2025-01-09 18:50:56 +00:00
921abc404d
(Is there anyway to tone down GCC's warning level? It outputs too many false positives for potentially uninitialized variables in which the genuine errors get drowned.)
338 lines
9.3 KiB
C++
338 lines
9.3 KiB
C++
//
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// Copyright (C) 1993-1996 by id Software, Inc.
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//
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// This source is available for distribution and/or modification
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// only under the terms of the DOOM Source Code License as
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// published by id Software. All rights reserved.
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//
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// The source is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
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// for more details.
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//
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#include <stdlib.h>
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#include <stddef.h>
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#include "templates.h"
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#include "i_system.h"
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#include "doomdef.h"
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#include "doomstat.h"
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#include "doomdata.h"
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#include "p_lnspec.h"
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#include "r_sky.h"
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#include "v_video.h"
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#include "m_swap.h"
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#include "w_wad.h"
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#include "stats.h"
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#include "a_sharedglobal.h"
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#include "d_net.h"
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#include "g_level.h"
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#include "swrenderer/scene/r_opaque_pass.h"
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#include "r_decal.h"
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#include "swrenderer/scene/r_3dfloors.h"
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#include "swrenderer/drawers/r_draw.h"
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#include "v_palette.h"
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#include "r_data/colormaps.h"
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#include "swrenderer/line/r_wallsetup.h"
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#include "swrenderer/line/r_walldraw.h"
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#include "swrenderer/segments/r_drawsegment.h"
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#include "swrenderer/scene/r_portal.h"
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#include "swrenderer/scene/r_scene.h"
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#include "swrenderer/scene/r_light.h"
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#include "swrenderer/things/r_wallsprite.h"
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#include "swrenderer/viewport/r_viewport.h"
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#include "swrenderer/viewport/r_spritedrawer.h"
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#include "swrenderer/r_memory.h"
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#include "swrenderer/r_renderthread.h"
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EXTERN_CVAR(Bool, r_fullbrightignoresectorcolor);
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namespace swrenderer
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{
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void RenderDecal::RenderDecals(RenderThread *thread, side_t *sidedef, DrawSegment *draw_segment, int wallshade, float lightleft, float lightstep, seg_t *curline, const FWallCoords &wallC, bool foggy, FDynamicColormap *basecolormap, const short *walltop, const short *wallbottom)
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{
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for (DBaseDecal *decal = sidedef->AttachedDecals; decal != NULL; decal = decal->WallNext)
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{
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Render(thread, sidedef, decal, draw_segment, wallshade, lightleft, lightstep, curline, wallC, foggy, basecolormap, walltop, wallbottom, 0);
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}
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}
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// pass = 0: when seg is first drawn
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// = 1: drawing masked textures (including sprites)
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// Currently, only pass = 0 is done or used
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void RenderDecal::Render(RenderThread *thread, side_t *wall, DBaseDecal *decal, DrawSegment *clipper, int wallshade, float lightleft, float lightstep, seg_t *curline, const FWallCoords &savecoord, bool foggy, FDynamicColormap *basecolormap, const short *walltop, const short *wallbottom, int pass)
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{
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DVector2 decal_left, decal_right, decal_pos;
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int x1, x2;
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double yscale;
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uint8_t flipx;
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double zpos;
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int needrepeat = 0;
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sector_t *front, *back;
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bool calclighting;
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bool rereadcolormap;
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FDynamicColormap *usecolormap;
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float light = 0;
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const short *mfloorclip;
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const short *mceilingclip;
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if (decal->RenderFlags & RF_INVISIBLE || !viewactive || !decal->PicNum.isValid())
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return;
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// Determine actor z
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zpos = decal->Z;
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front = curline->frontsector;
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back = (curline->backsector != NULL) ? curline->backsector : curline->frontsector;
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switch (decal->RenderFlags & RF_RELMASK)
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{
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default:
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zpos = decal->Z;
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break;
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case RF_RELUPPER:
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if (curline->linedef->flags & ML_DONTPEGTOP)
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{
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zpos = decal->Z + front->GetPlaneTexZ(sector_t::ceiling);
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}
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else
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{
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zpos = decal->Z + back->GetPlaneTexZ(sector_t::ceiling);
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}
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break;
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case RF_RELLOWER:
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if (curline->linedef->flags & ML_DONTPEGBOTTOM)
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{
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zpos = decal->Z + front->GetPlaneTexZ(sector_t::ceiling);
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}
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else
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{
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zpos = decal->Z + back->GetPlaneTexZ(sector_t::floor);
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}
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break;
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case RF_RELMID:
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if (curline->linedef->flags & ML_DONTPEGBOTTOM)
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{
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zpos = decal->Z + front->GetPlaneTexZ(sector_t::floor);
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}
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else
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{
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zpos = decal->Z + front->GetPlaneTexZ(sector_t::ceiling);
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}
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}
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FTexture *WallSpriteTile = TexMan(decal->PicNum, true);
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flipx = (uint8_t)(decal->RenderFlags & RF_XFLIP);
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if (WallSpriteTile == NULL || WallSpriteTile->UseType == FTexture::TEX_Null)
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{
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return;
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}
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// Determine left and right edges of sprite. Since this sprite is bound
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// to a wall, we use the wall's angle instead of the decal's. This is
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// pretty much the same as what R_AddLine() does.
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double edge_right = WallSpriteTile->GetWidth();
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double edge_left = WallSpriteTile->LeftOffset;
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edge_right = (edge_right - edge_left) * decal->ScaleX;
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edge_left *= decal->ScaleX;
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double dcx, dcy;
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decal->GetXY(wall, dcx, dcy);
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decal_pos = { dcx, dcy };
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DVector2 angvec = (curline->v2->fPos() - curline->v1->fPos()).Unit();
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float maskedScaleY;
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decal_left = decal_pos - edge_left * angvec - ViewPos;
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decal_right = decal_pos + edge_right * angvec - ViewPos;
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CameraLight *cameraLight;
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double texturemid;
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FWallCoords WallC;
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if (WallC.Init(thread, decal_left, decal_right, TOO_CLOSE_Z))
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return;
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x1 = WallC.sx1;
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x2 = WallC.sx2;
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if (x1 >= clipper->x2 || x2 <= clipper->x1)
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return;
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FWallTmapVals WallT;
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WallT.InitFromWallCoords(thread, &WallC);
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// Get the top and bottom clipping arrays
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switch (decal->RenderFlags & RF_CLIPMASK)
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{
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default:
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// keep GCC quiet.
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return;
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case RF_CLIPFULL:
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if (curline->backsector == NULL)
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{
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if (pass != 0)
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{
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return;
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}
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mceilingclip = walltop;
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mfloorclip = wallbottom;
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}
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else if (pass == 0)
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{
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mceilingclip = walltop;
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mfloorclip = thread->OpaquePass->ceilingclip;
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needrepeat = 1;
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}
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else
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{
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mceilingclip = clipper->sprtopclip - clipper->x1;
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mfloorclip = clipper->sprbottomclip - clipper->x1;
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}
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break;
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case RF_CLIPUPPER:
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if (pass != 0)
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{
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return;
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}
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mceilingclip = walltop;
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mfloorclip = thread->OpaquePass->ceilingclip;
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break;
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case RF_CLIPMID:
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if (curline->backsector != NULL && pass != 2)
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{
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return;
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}
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mceilingclip = clipper->sprtopclip - clipper->x1;
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mfloorclip = clipper->sprbottomclip - clipper->x1;
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break;
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case RF_CLIPLOWER:
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if (pass != 0)
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{
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return;
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}
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mceilingclip = thread->OpaquePass->floorclip;
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mfloorclip = wallbottom;
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break;
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}
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yscale = decal->ScaleY;
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texturemid = WallSpriteTile->TopOffset + (zpos - ViewPos.Z) / yscale;
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// Clip sprite to drawseg
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x1 = MAX<int>(clipper->x1, x1);
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x2 = MIN<int>(clipper->x2, x2);
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if (x1 >= x2)
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{
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return;
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}
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ProjectedWallTexcoords walltexcoords;
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walltexcoords.Project(WallSpriteTile->GetWidth(), x1, x2, WallT);
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if (flipx)
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{
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int i;
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int right = (WallSpriteTile->GetWidth() << FRACBITS) - 1;
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for (i = x1; i < x2; i++)
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{
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walltexcoords.UPos[i] = right - walltexcoords.UPos[i];
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}
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}
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// Prepare lighting
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calclighting = false;
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usecolormap = basecolormap;
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rereadcolormap = true;
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// Decals that are added to the scene must fade to black.
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if (decal->RenderStyle == LegacyRenderStyles[STYLE_Add] && usecolormap->Fade != 0)
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{
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usecolormap = GetSpecialLights(usecolormap->Color, 0, usecolormap->Desaturate);
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rereadcolormap = false;
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}
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light = lightleft + (x1 - savecoord.sx1) * lightstep;
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cameraLight = CameraLight::Instance();
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// Draw it
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bool sprflipvert;
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if (decal->RenderFlags & RF_YFLIP)
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{
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sprflipvert = true;
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yscale = -yscale;
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texturemid -= WallSpriteTile->GetHeight();
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}
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else
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{
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sprflipvert = false;
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}
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maskedScaleY = float(1 / yscale);
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do
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{
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int x = x1;
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SpriteDrawerArgs drawerargs;
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if (cameraLight->FixedLightLevel() >= 0)
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drawerargs.SetLight((r_fullbrightignoresectorcolor) ? &FullNormalLight : usecolormap, 0, cameraLight->FixedLightLevelShade());
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else if (cameraLight->FixedColormap() != NULL)
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drawerargs.SetLight(cameraLight->FixedColormap(), 0, 0);
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else if (!foggy && (decal->RenderFlags & RF_FULLBRIGHT))
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drawerargs.SetLight((r_fullbrightignoresectorcolor) ? &FullNormalLight : usecolormap, 0, 0);
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else
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calclighting = true;
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bool visible = drawerargs.SetStyle(decal->RenderStyle, (float)decal->Alpha, decal->Translation, decal->AlphaColor, basecolormap);
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// R_SetPatchStyle can modify basecolormap.
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if (rereadcolormap)
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{
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usecolormap = basecolormap;
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}
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if (visible)
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{
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while (x < x2)
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{
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if (calclighting)
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{ // calculate lighting
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drawerargs.SetLight(usecolormap, light, wallshade);
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}
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DrawColumn(thread, drawerargs, x, WallSpriteTile, walltexcoords, texturemid, maskedScaleY, sprflipvert, mfloorclip, mceilingclip);
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light += lightstep;
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x++;
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}
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}
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// If this sprite is RF_CLIPFULL on a two-sided line, needrepeat will
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// be set 1 if we need to draw on the lower wall. In all other cases,
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// needrepeat will be 0, and the while will fail.
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mceilingclip = thread->OpaquePass->floorclip;
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mfloorclip = wallbottom;
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} while (needrepeat--);
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}
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void RenderDecal::DrawColumn(RenderThread *thread, SpriteDrawerArgs &drawerargs, int x, FTexture *WallSpriteTile, const ProjectedWallTexcoords &walltexcoords, double texturemid, float maskedScaleY, bool sprflipvert, const short *mfloorclip, const short *mceilingclip)
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{
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auto viewport = RenderViewport::Instance();
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float iscale = walltexcoords.VStep[x] * maskedScaleY;
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double spryscale = 1 / iscale;
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double sprtopscreen;
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if (sprflipvert)
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sprtopscreen = viewport->CenterY + texturemid * spryscale;
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else
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sprtopscreen = viewport->CenterY - texturemid * spryscale;
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drawerargs.DrawMaskedColumn(thread, x, FLOAT2FIXED(iscale), WallSpriteTile, walltexcoords.UPos[x], spryscale, sprtopscreen, sprflipvert, mfloorclip, mceilingclip);
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}
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}
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