565 lines
18 KiB
C++
565 lines
18 KiB
C++
//-----------------------------------------------------------------------------
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//
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// Copyright 1993-1996 id Software
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// Copyright 1999-2016 Randy Heit
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// Copyright 2016 Magnus Norddahl
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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 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 General Public License for more details.
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//
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// You should have received a copy of the GNU 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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#include <stdlib.h>
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#include <stddef.h>
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#include <cmath>
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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 "r_sky.h"
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#include "v_video.h"
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#include "m_swap.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 "r_walldraw.h"
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#include "v_palette.h"
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#include "r_data/colormaps.h"
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#include "a_dynlight.h"
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#include "swrenderer/drawers/r_draw.h"
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#include "swrenderer/segments/r_drawsegment.h"
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#include "swrenderer/scene/r_opaque_pass.h"
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#include "swrenderer/scene/r_3dfloors.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/viewport/r_viewport.h"
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#include "swrenderer/line/r_walldraw.h"
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#include "swrenderer/line/r_wallsetup.h"
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#include "swrenderer/r_renderthread.h"
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#include "swrenderer/r_memory.h"
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namespace swrenderer
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{
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void RenderWallPart::ProcessNormalWall(const short *uwal, const short *dwal, double texturemid, const ProjectedWallTexcoords& texcoords)
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{
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if (rw_pic == nullptr)
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return;
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int fracbits = 32 - rw_pic->GetHeightBits();
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if (fracbits == 32)
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{ // Hack for one pixel tall textures
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fracbits = 0;
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yrepeat = 0;
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texturemid = 0;
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}
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WallDrawerArgs drawerargs;
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drawerargs.SetTextureFracBits(Thread->Viewport->RenderTarget->IsBgra() ? FRACBITS : fracbits);
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// Textures that aren't masked can use the faster opaque drawer
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if (!rw_pic->GetTexture()->isMasked() && mask && alpha >= OPAQUE && !additive)
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{
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drawerargs.SetStyle(true, false, OPAQUE, mLight.GetBaseColormap());
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}
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else
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{
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drawerargs.SetStyle(mask, additive, alpha, mLight.GetBaseColormap());
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}
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RenderViewport *viewport = Thread->Viewport.get();
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CameraLight *cameraLight = CameraLight::Instance();
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bool fixed = (cameraLight->FixedColormap() || cameraLight->FixedLightLevel() >= 0);
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bool haslights = r_dynlights && light_list;
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if (haslights)
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{
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float dx = WallC.tright.X - WallC.tleft.X;
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float dy = WallC.tright.Y - WallC.tleft.Y;
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float length = sqrt(dx * dx + dy * dy);
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drawerargs.dc_normal.X = dy / length;
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drawerargs.dc_normal.Y = -dx / length;
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drawerargs.dc_normal.Z = 0.0f;
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}
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double xmagnitude = 1.0;
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float curlight = mLight.GetLightPos(x1);
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float lightstep = mLight.GetLightStep();
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if (viewport->RenderTarget->IsBgra())
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{
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for (int x = x1; x < x2; x++, curlight += lightstep)
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{
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int y1 = uwal[x];
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int y2 = dwal[x];
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if (y2 <= y1)
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continue;
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if (!fixed)
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drawerargs.SetLight(curlight, mLight.GetLightLevel(), mLight.GetFoggy(), viewport);
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if (x + 1 < x2) xmagnitude = fabs(FIXED2DBL(texcoords.UPos(x + 1)) - FIXED2DBL(texcoords.UPos(x)));
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fixed_t xxoffset = (texcoords.UPos(x) + xoffset + FLOAT2FIXED(xmagnitude * 0.5)) * rw_pic->GetPhysicalScale();
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// Normalize to 0-1 range:
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double uv_stepd = texcoords.VStep(x) * yrepeat;
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double v = (texturemid + uv_stepd * (y1 - viewport->CenterY + 0.5)) / rw_pic->GetHeight();
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v = v - floor(v);
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double v_step = uv_stepd / rw_pic->GetHeight();
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if (std::isnan(v) || std::isnan(v_step)) // this should never happen, but it apparently does..
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{
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uv_stepd = 0.0;
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v = 0.0;
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v_step = 0.0;
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}
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// Convert to uint32_t:
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uint32_t uv_pos = (uint32_t)(int64_t)(v * 0x100000000LL);
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uint32_t uv_step = (uint32_t)(int64_t)(v_step * 0x100000000LL);
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// Texture mipmap and filter selection:
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double ymagnitude = fabs(uv_stepd);
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double magnitude = MAX(ymagnitude, xmagnitude);
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double min_lod = -1000.0;
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double lod = MAX(log2(magnitude) + r_lod_bias, min_lod);
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bool magnifying = lod < 0.0f;
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int mipmap_offset = 0;
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int mip_width = rw_pic->GetPhysicalWidth();
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int mip_height = rw_pic->GetPhysicalHeight();
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if (r_mipmap && rw_pic->Mipmapped() && mip_width > 1 && mip_height > 1)
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{
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uint32_t xpos = (uint32_t)((((uint64_t)xxoffset) << FRACBITS) / mip_width);
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int level = (int)lod;
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while (level > 0 && mip_width > 1 && mip_height > 1)
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{
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mipmap_offset += mip_width * mip_height;
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level--;
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mip_width = MAX(mip_width >> 1, 1);
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mip_height = MAX(mip_height >> 1, 1);
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}
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xxoffset = (xpos >> FRACBITS) * mip_width;
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}
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const uint32_t *pixels = rw_pic->GetPixelsBgra() + mipmap_offset;
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const uint8_t *source;
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const uint8_t *source2;
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uint32_t texturefracx;
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uint32_t height;
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bool filter_nearest = (magnifying && !r_magfilter) || (!magnifying && !r_minfilter);
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if (filter_nearest)
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{
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int tx = (xxoffset >> FRACBITS) % mip_width;
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if (tx < 0)
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tx += mip_width;
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source = (uint8_t*)(pixels + tx * mip_height);
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source2 = nullptr;
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height = mip_height;
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texturefracx = 0;
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}
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else
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{
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xxoffset -= FRACUNIT / 2;
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int tx0 = (xxoffset >> FRACBITS) % mip_width;
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if (tx0 < 0)
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tx0 += mip_width;
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int tx1 = (tx0 + 1) % mip_width;
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source = (uint8_t*)(pixels + tx0 * mip_height);
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source2 = (uint8_t*)(pixels + tx1 * mip_height);
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height = mip_height;
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texturefracx = (xxoffset >> (FRACBITS - 4)) & 15;
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}
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drawerargs.SetTexture(source, source2, height);
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if (haslights)
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SetLights(drawerargs, x, y1);
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else
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drawerargs.dc_num_lights = 0;
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drawerargs.SetTextureUPos(texturefracx);
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drawerargs.SetTextureVStep(uv_step);
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int count = y2 - y1;
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drawerargs.SetDest(viewport, x, y1);
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drawerargs.SetCount(count);
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drawerargs.SetTextureVPos(uv_pos);
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drawerargs.DrawColumn(Thread);
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}
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}
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else
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{
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uint32_t height = rw_pic->GetPhysicalHeight();
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uint32_t uv_max;
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int uv_fracbits = 32 - rw_pic->GetHeightBits();
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if (uv_fracbits != 32)
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uv_max = height << uv_fracbits;
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for (int x = x1; x < x2; x++, curlight += lightstep)
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{
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int y1 = uwal[x];
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int y2 = dwal[x];
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if (y2 <= y1)
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continue;
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if (!fixed)
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drawerargs.SetLight(curlight, mLight.GetLightLevel(), mLight.GetFoggy(), viewport);
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if (x + 1 < x2) xmagnitude = fabs(FIXED2DBL(texcoords.UPos(x + 1)) - FIXED2DBL(texcoords.UPos(x)));
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uint32_t uv_pos;
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uint32_t uv_step;
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fixed_t xxoffset = (texcoords.UPos(x) + xoffset + FLOAT2FIXED(xmagnitude * 0.5)) * rw_pic->GetPhysicalScale();
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if (uv_fracbits != 32)
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{
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// Find start uv in [0-base_height[ range.
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// Not using xs_ToFixed because it rounds the result and we need something that always rounds down to stay within the range.
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double uv_stepd = texcoords.VStep(x) * yrepeat;
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double v = (texturemid + uv_stepd * (y1 - viewport->CenterY + 0.5)) / rw_pic->GetHeight();
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v = v - floor(v);
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v *= height;
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v *= (1 << uv_fracbits);
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uv_pos = (uint32_t)(int64_t)v;
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uv_step = xs_ToFixed(uv_fracbits, uv_stepd * rw_pic->GetPhysicalScale());
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if (uv_step == 0) // To prevent divide by zero elsewhere
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uv_step = 1;
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}
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else
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{ // Hack for one pixel tall textures
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uv_pos = 0;
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uv_step = 0;
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uv_max = 1;
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}
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int col = xxoffset >> FRACBITS;
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// If the texture's width isn't a power of 2, then we need to make it a
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// positive offset for proper clamping.
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int width;
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if (col < 0 && (width = rw_pic->GetPhysicalWidth()) != (1 << rw_pic->GetWidthBits()))
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{
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col = width + (col % width);
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}
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drawerargs.SetTexture(rw_pic->GetColumn(DefaultRenderStyle(), col, nullptr), nullptr, height);
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if (haslights)
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SetLights(drawerargs, x, y1);
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else
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drawerargs.dc_num_lights = 0;
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drawerargs.SetTextureVStep(uv_step);
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if (uv_max == 0 || uv_step == 0) // power of two
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{
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int count = y2 - y1;
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drawerargs.SetDest(viewport, x, y1);
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drawerargs.SetCount(count);
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drawerargs.SetTextureVPos(uv_pos);
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drawerargs.DrawColumn(Thread);
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}
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else
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{
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uint32_t left = y2 - y1;
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int y = y1;
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while (left > 0)
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{
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uint32_t available = uv_max - uv_pos;
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uint32_t next_uv_wrap = available / uv_step;
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if (available % uv_step != 0)
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next_uv_wrap++;
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uint32_t count = MIN(left, next_uv_wrap);
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drawerargs.SetDest(viewport, x, y);
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drawerargs.SetCount(count);
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drawerargs.SetTextureVPos(uv_pos);
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drawerargs.DrawColumn(Thread);
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y += count;
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left -= count;
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uv_pos += uv_step * count;
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if (uv_pos >= uv_max)
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uv_pos -= uv_max;
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}
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}
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}
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}
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if (r_modelscene)
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{
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for (int x = x1; x < x2; x++)
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{
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int y1 = uwal[x];
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int y2 = dwal[x];
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if (y2 > y1)
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{
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int count = y2 - y1;
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float w1 = 1.0f / WallC.sz1;
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float w2 = 1.0f / WallC.sz2;
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float t = (x - WallC.sx1 + 0.5f) / (WallC.sx2 - WallC.sx1);
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float wcol = w1 * (1.0f - t) + w2 * t;
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float zcol = 1.0f / wcol;
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float zbufferdepth = 1.0f / (zcol / viewport->viewwindow.FocalTangent);
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drawerargs.SetDest(viewport, x, y1);
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drawerargs.SetCount(count);
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drawerargs.DrawDepthColumn(Thread, zbufferdepth);
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}
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}
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}
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}
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void RenderWallPart::SetLights(WallDrawerArgs &drawerargs, int x, int y1)
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{
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bool mirror = !!(Thread->Portal->MirrorFlags & RF_XFLIP);
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int tx = x;
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if (mirror)
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tx = viewwidth - tx - 1;
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RenderViewport *viewport = Thread->Viewport.get();
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// Find column position in view space
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float w1 = 1.0f / WallC.sz1;
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float w2 = 1.0f / WallC.sz2;
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float t = (x - WallC.sx1 + 0.5f) / (WallC.sx2 - WallC.sx1);
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float wcol = w1 * (1.0f - t) + w2 * t;
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float zcol = 1.0f / wcol;
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drawerargs.dc_viewpos.X = (float)((tx + 0.5 - viewport->CenterX) / viewport->CenterX * zcol);
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drawerargs.dc_viewpos.Y = zcol;
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drawerargs.dc_viewpos.Z = (float)((viewport->CenterY - y1 - 0.5) / viewport->InvZtoScale * zcol);
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drawerargs.dc_viewpos_step.Z = (float)(-zcol / viewport->InvZtoScale);
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// Calculate max lights that can touch column so we can allocate memory for the list
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int max_lights = 0;
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FLightNode *cur_node = light_list;
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while (cur_node)
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{
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if (cur_node->lightsource->IsActive())
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max_lights++;
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cur_node = cur_node->nextLight;
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}
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drawerargs.dc_num_lights = 0;
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drawerargs.dc_lights = Thread->FrameMemory->AllocMemory<DrawerLight>(max_lights);
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// Setup lights for column
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cur_node = light_list;
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while (cur_node)
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{
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if (cur_node->lightsource->IsActive())
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{
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double lightX = cur_node->lightsource->X() - viewport->viewpoint.Pos.X;
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double lightY = cur_node->lightsource->Y() - viewport->viewpoint.Pos.Y;
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double lightZ = cur_node->lightsource->Z() - viewport->viewpoint.Pos.Z;
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float lx = (float)(lightX * viewport->viewpoint.Sin - lightY * viewport->viewpoint.Cos) - drawerargs.dc_viewpos.X;
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float ly = (float)(lightX * viewport->viewpoint.TanCos + lightY * viewport->viewpoint.TanSin) - drawerargs.dc_viewpos.Y;
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float lz = (float)lightZ;
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// Precalculate the constant part of the dot here so the drawer doesn't have to.
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bool is_point_light = cur_node->lightsource->IsAttenuated();
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float lconstant = lx * lx + ly * ly;
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float nlconstant = is_point_light ? lx * drawerargs.dc_normal.X + ly * drawerargs.dc_normal.Y : 0.0f;
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// Include light only if it touches this column
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float radius = cur_node->lightsource->GetRadius();
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if (radius * radius >= lconstant && nlconstant >= 0.0f)
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{
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uint32_t red = cur_node->lightsource->GetRed();
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uint32_t green = cur_node->lightsource->GetGreen();
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uint32_t blue = cur_node->lightsource->GetBlue();
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auto &light = drawerargs.dc_lights[drawerargs.dc_num_lights++];
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light.x = lconstant;
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light.y = nlconstant;
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light.z = lz;
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light.radius = 256.0f / cur_node->lightsource->GetRadius();
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light.color = (red << 16) | (green << 8) | blue;
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}
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}
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cur_node = cur_node->nextLight;
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}
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}
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void RenderWallPart::ProcessStripedWall(const short *uwal, const short *dwal, double texturemid, const ProjectedWallTexcoords& texcoords)
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{
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ProjectedWallLine most1, most2, most3;
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const short *up;
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short *down;
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up = uwal;
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down = most1.ScreenY;
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assert(WallC.sx1 <= x1);
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assert(WallC.sx2 >= x2);
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RenderPortal *renderportal = Thread->Portal.get();
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// kg3D - fake floors instead of zdoom light list
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for (unsigned int i = 0; i < frontsector->e->XFloor.lightlist.Size(); i++)
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{
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ProjectedWallCull j = most3.Project(Thread->Viewport.get(), frontsector->e->XFloor.lightlist[i].plane, &WallC, curline, renderportal->MirrorFlags & RF_XFLIP);
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if (j != ProjectedWallCull::OutsideAbove)
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{
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for (int j = x1; j < x2; ++j)
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{
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down[j] = clamp(most3.ScreenY[j], up[j], dwal[j]);
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}
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ProcessNormalWall(up, down, texturemid, texcoords);
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up = down;
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down = (down == most1.ScreenY) ? most2.ScreenY : most1.ScreenY;
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}
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mLight.SetColormap(frontsector, curline, &frontsector->e->XFloor.lightlist[i]);
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}
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ProcessNormalWall(up, dwal, texturemid, texcoords);
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}
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void RenderWallPart::ProcessWall(const short *uwal, const short *dwal, double texturemid, const ProjectedWallTexcoords& texcoords)
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{
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CameraLight *cameraLight = CameraLight::Instance();
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if (cameraLight->FixedColormap() != NULL || cameraLight->FixedLightLevel() >= 0 || !(frontsector->e && frontsector->e->XFloor.lightlist.Size()))
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{
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ProcessNormalWall(uwal, dwal, texturemid, texcoords);
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}
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else
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{
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ProcessStripedWall(uwal, dwal, texturemid, texcoords);
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}
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}
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//=============================================================================
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//
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// ProcessWallNP2
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//
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// This is a wrapper around ProcessWall that helps it tile textures whose heights
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// are not powers of 2. It divides the wall into texture-sized strips and calls
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// ProcessNormalWall for each of those. Since only one repetition of the texture fits
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// in each strip, ProcessWall will not tile.
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//
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//=============================================================================
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void RenderWallPart::ProcessWallNP2(const short *uwal, const short *dwal, double texturemid, const ProjectedWallTexcoords& texcoords, double top, double bot)
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{
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ProjectedWallLine most1, most2, most3;
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double texheight = rw_pic->GetHeight();
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double partition;
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double scaledtexheight = texheight / yrepeat;
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if (yrepeat >= 0)
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{ // normal orientation: draw strips from top to bottom
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partition = top - fmod(top - texturemid / yrepeat - Thread->Viewport->viewpoint.Pos.Z, scaledtexheight);
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if (partition == top)
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{
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partition -= scaledtexheight;
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}
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const short *up = uwal;
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short *down = most1.ScreenY;
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texturemid = (partition - Thread->Viewport->viewpoint.Pos.Z) * yrepeat + texheight;
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while (partition > bot)
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{
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ProjectedWallCull j = most3.Project(Thread->Viewport.get(), partition - Thread->Viewport->viewpoint.Pos.Z, &WallC);
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if (j != ProjectedWallCull::OutsideAbove)
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{
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for (int j = x1; j < x2; ++j)
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{
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down[j] = clamp(most3.ScreenY[j], up[j], dwal[j]);
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}
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ProcessWall(up, down, texturemid, texcoords);
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up = down;
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down = (down == most1.ScreenY) ? most2.ScreenY : most1.ScreenY;
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}
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partition -= scaledtexheight;
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texturemid -= texheight;
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}
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ProcessWall(up, dwal, texturemid, texcoords);
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}
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else
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{ // upside down: draw strips from bottom to top
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partition = bot - fmod(bot - texturemid / yrepeat - Thread->Viewport->viewpoint.Pos.Z, scaledtexheight);
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short *up = most1.ScreenY;
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const short *down = dwal;
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texturemid = (partition - Thread->Viewport->viewpoint.Pos.Z) * yrepeat + texheight;
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while (partition < top)
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{
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ProjectedWallCull j = most3.Project(Thread->Viewport.get(), partition - Thread->Viewport->viewpoint.Pos.Z, &WallC);
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if (j != ProjectedWallCull::OutsideBelow)
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{
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for (int j = x1; j < x2; ++j)
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{
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up[j] = clamp(most3.ScreenY[j], uwal[j], down[j]);
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}
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ProcessWall(up, down, texturemid, texcoords);
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down = up;
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up = (up == most1.ScreenY) ? most2.ScreenY : most1.ScreenY;
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}
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partition -= scaledtexheight;
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texturemid -= texheight;
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}
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ProcessWall(uwal, down, texturemid, texcoords);
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}
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}
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void RenderWallPart::Render(sector_t *frontsector, seg_t *curline, const FWallCoords &WallC, FSoftwareTexture *pic, int x1, int x2, const short *walltop, const short *wallbottom, double texturemid, const ProjectedWallTexcoords& texcoords, double yscale, double top, double bottom, bool mask, bool additive, fixed_t alpha, fixed_t xoffset, const ProjectedWallLight &light, FLightNode *light_list)
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{
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this->x1 = x1;
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this->x2 = x2;
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this->frontsector = frontsector;
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this->curline = curline;
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this->WallC = WallC;
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this->yrepeat = yscale;
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this->mLight = light;
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this->xoffset = xoffset;
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this->light_list = light_list;
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this->rw_pic = pic;
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this->mask = mask;
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this->additive = additive;
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this->alpha = alpha;
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Thread->PrepareTexture(pic, DefaultRenderStyle()); // Get correct render style? Shaded won't get here.
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if (rw_pic->GetHeight() != 1 << rw_pic->GetHeightBits())
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{
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ProcessWallNP2(walltop, wallbottom, texturemid, texcoords, top, bottom);
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}
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else
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{
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ProcessWall(walltop, wallbottom, texturemid, texcoords);
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}
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}
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RenderWallPart::RenderWallPart(RenderThread *thread)
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{
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Thread = thread;
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}
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}
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