305 lines
7.9 KiB
C++
305 lines
7.9 KiB
C++
//
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//---------------------------------------------------------------------------
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//
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// Copyright(C) 2002-2016 Christoph Oelckers
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// All rights reserved.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program 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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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with this program. If not, see http://www.gnu.org/licenses/
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//
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//--------------------------------------------------------------------------
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//
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/*
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** gl_drawinfo.cpp
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** Implements the draw info structure which contains most of the
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** data in a scene and the draw lists - including a very thorough BSP
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** style sorting algorithm for translucent objects.
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**
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*/
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#include "gl_load/gl_system.h"
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#include "r_sky.h"
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#include "r_utility.h"
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#include "doomstat.h"
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#include "g_levellocals.h"
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#include "tarray.h"
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#include "hwrenderer/scene/hw_drawstructs.h"
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#include "gl/data/gl_vertexbuffer.h"
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#include "gl/scene/gl_drawinfo.h"
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#include "hwrenderer/scene/hw_clipper.h"
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#include "gl/scene/gl_portal.h"
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#include "gl/renderer/gl_renderstate.h"
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#include "gl/dynlights/gl_lightbuffer.h"
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class FDrawInfoList
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{
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public:
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TDeletingArray<FDrawInfo *> mList;
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FDrawInfo * GetNew();
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void Release(FDrawInfo *);
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};
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static FDrawInfo * gl_drawinfo;
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FDrawInfoList di_list;
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//==========================================================================
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//
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//
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//
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//==========================================================================
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void FDrawInfo::DoDrawSorted(HWDrawList *dl, SortNode * head)
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{
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float clipsplit[2];
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int relation = 0;
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float z = 0.f;
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gl_RenderState.GetClipSplit(clipsplit);
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if (dl->drawitems[head->itemindex].rendertype == GLDIT_FLAT)
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{
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z = dl->flats[dl->drawitems[head->itemindex].index]->z;
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relation = z > Viewpoint.Pos.Z ? 1 : -1;
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}
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// left is further away, i.e. for stuff above viewz its z coordinate higher, for stuff below viewz its z coordinate is lower
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if (head->left)
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{
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if (relation == -1)
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{
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gl_RenderState.SetClipSplit(clipsplit[0], z); // render below: set flat as top clip plane
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}
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else if (relation == 1)
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{
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gl_RenderState.SetClipSplit(z, clipsplit[1]); // render above: set flat as bottom clip plane
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}
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DoDrawSorted(dl, head->left);
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gl_RenderState.SetClipSplit(clipsplit);
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}
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dl->DoDraw(this, GLPASS_TRANSLUCENT, head->itemindex, true);
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if (head->equal)
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{
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SortNode * ehead=head->equal;
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while (ehead)
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{
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dl->DoDraw(this, GLPASS_TRANSLUCENT, ehead->itemindex, true);
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ehead=ehead->equal;
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}
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}
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// right is closer, i.e. for stuff above viewz its z coordinate is lower, for stuff below viewz its z coordinate is higher
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if (head->right)
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{
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if (relation == 1)
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{
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gl_RenderState.SetClipSplit(clipsplit[0], z); // render below: set flat as top clip plane
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}
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else if (relation == -1)
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{
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gl_RenderState.SetClipSplit(z, clipsplit[1]); // render above: set flat as bottom clip plane
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}
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DoDrawSorted(dl, head->right);
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gl_RenderState.SetClipSplit(clipsplit);
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}
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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void FDrawInfo::DrawSorted(int listindex)
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{
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HWDrawList *dl = &drawlists[listindex];
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if (dl->drawitems.Size()==0) return;
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if (!dl->sorted)
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{
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GLRenderer->mVBO->Map();
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dl->Sort(this);
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GLRenderer->mVBO->Unmap();
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}
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gl_RenderState.ClearClipSplit();
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if (!(gl.flags & RFL_NO_CLIP_PLANES))
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{
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glEnable(GL_CLIP_DISTANCE1);
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glEnable(GL_CLIP_DISTANCE2);
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}
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DoDrawSorted(dl, dl->sorted);
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if (!(gl.flags & RFL_NO_CLIP_PLANES))
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{
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glDisable(GL_CLIP_DISTANCE1);
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glDisable(GL_CLIP_DISTANCE2);
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}
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gl_RenderState.ClearClipSplit();
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}
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//==========================================================================
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//
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// Try to reuse the lists as often as possible as they contain resources that
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// are expensive to create and delete.
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//
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// Note: If multithreading gets used, this class needs synchronization.
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//
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//==========================================================================
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FDrawInfo *FDrawInfoList::GetNew()
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{
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if (mList.Size() > 0)
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{
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FDrawInfo *di;
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mList.Pop(di);
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return di;
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}
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return new FDrawInfo;
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}
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void FDrawInfoList::Release(FDrawInfo * di)
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{
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di->ClearBuffers();
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mList.Push(di);
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}
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//==========================================================================
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//
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// Sets up a new drawinfo struct
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//
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//==========================================================================
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// OpenGL has no use for multiple clippers so use the same one for all DrawInfos.
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static Clipper staticClipper;
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FDrawInfo *FDrawInfo::StartDrawInfo(FRenderViewpoint &parentvp, HWViewpointUniforms *uniforms)
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{
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FDrawInfo *di=di_list.GetNew();
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di->mVBO = GLRenderer->mVBO;
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di->mClipper = &staticClipper;
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di->Viewpoint = parentvp;
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if (uniforms)
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{
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di->VPUniforms = *uniforms;
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// The clip planes will never be inherited from the parent drawinfo.
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di->VPUniforms.mClipLine.X = -1000001.f;
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di->VPUniforms.mClipHeight = 0;
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}
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else di->VPUniforms.SetDefaults();
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di->mClipper->SetViewpoint(di->Viewpoint);
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staticClipper.Clear();
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di->StartScene();
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return di;
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}
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void FDrawInfo::StartScene()
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{
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ClearBuffers();
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outer = gl_drawinfo;
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gl_drawinfo = this;
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for (int i = 0; i < GLDL_TYPES; i++) drawlists[i].Reset();
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decals[0].Clear();
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decals[1].Clear();
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hudsprites.Clear();
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vpIndex = 0;
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// Fullbright information needs to be propagated from the main view.
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if (outer != nullptr) FullbrightFlags = outer->FullbrightFlags;
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else FullbrightFlags = 0;
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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FDrawInfo *FDrawInfo::EndDrawInfo()
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{
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assert(this == gl_drawinfo);
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for(int i=0;i<GLDL_TYPES;i++) drawlists[i].Reset();
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gl_drawinfo=static_cast<FDrawInfo*>(outer);
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di_list.Release(this);
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if (gl_drawinfo == nullptr)
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ResetRenderDataAllocator();
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return gl_drawinfo;
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}
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// Same here for the dependency on the portal.
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void FDrawInfo::AddSubsectorToPortal(FSectorPortalGroup *ptg, subsector_t *sub)
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{
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auto portal = FindPortal(ptg);
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if (!portal)
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{
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portal = new GLScenePortal(&GLRenderer->mPortalState, new HWSectorStackPortal(ptg));
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Portals.Push(portal);
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}
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auto ptl = static_cast<HWSectorStackPortal*>(static_cast<GLScenePortal*>(portal)->mScene);
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ptl->AddSubsector(sub);
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}
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std::pair<FFlatVertex *, unsigned int> FDrawInfo::AllocVertices(unsigned int count)
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{
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unsigned int index = -1;
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auto p = GLRenderer->mVBO->Alloc(count, &index);
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return std::make_pair(p, index);
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}
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GLDecal *FDrawInfo::AddDecal(bool onmirror)
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{
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auto decal = (GLDecal*)RenderDataAllocator.Alloc(sizeof(GLDecal));
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decals[onmirror ? 1 : 0].Push(decal);
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return decal;
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}
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int FDrawInfo::UploadLights(FDynLightData &data)
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{
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return GLRenderer->mLights->UploadLights(data);
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}
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bool FDrawInfo::SetDepthClamp(bool on)
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{
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return gl_RenderState.SetDepthClamp(on);
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}
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static int dt2gl[] = { GL_POINTS, GL_LINES, GL_TRIANGLES, GL_TRIANGLE_FAN, GL_TRIANGLE_STRIP };
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void FDrawInfo::Draw(EDrawType dt, FRenderState &state, int index, int count, bool apply)
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{
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assert(&state == &gl_RenderState);
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if (apply)
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{
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gl_RenderState.Apply();
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gl_RenderState.ApplyLightIndex(-2);
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}
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drawcalls.Clock();
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glDrawArrays(dt2gl[dt], index, count);
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drawcalls.Unclock();
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}
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void FDrawInfo::DrawIndexed(EDrawType dt, FRenderState &state, int index, int count, bool apply)
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{
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assert(&state == &gl_RenderState);
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if (apply)
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{
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gl_RenderState.Apply();
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gl_RenderState.ApplyLightIndex(-2);
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}
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drawcalls.Clock();
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glDrawElements(dt2gl[dt], count, GL_UNSIGNED_INT, GLRenderer->mVBO->GetIndexPointer() + index);
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drawcalls.Unclock();
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}
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