/
screen_triangle.cpp
2287 lines (2027 loc) · 74.7 KB
/
screen_triangle.cpp
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/*
** Polygon Doom software renderer
** Copyright (c) 2016 Magnus Norddahl
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
*/
#include <stddef.h>
#include "templates.h"
#include "doomdef.h"
#include "w_wad.h"
#include "v_video.h"
#include "doomstat.h"
#include "st_stuff.h"
#include "g_game.h"
#include "g_level.h"
#include "r_data/r_translate.h"
#include "v_palette.h"
#include "r_data/colormaps.h"
#include "poly_triangle.h"
#include "swrenderer/drawers/r_draw_rgba.h"
#include "screen_triangle.h"
#include "x86.h"
static void SortVertices(const TriDrawTriangleArgs *args, ShadedTriVertex **sortedVertices)
{
sortedVertices[0] = args->v1;
sortedVertices[1] = args->v2;
sortedVertices[2] = args->v3;
if (sortedVertices[1]->y < sortedVertices[0]->y)
std::swap(sortedVertices[0], sortedVertices[1]);
if (sortedVertices[2]->y < sortedVertices[0]->y)
std::swap(sortedVertices[0], sortedVertices[2]);
if (sortedVertices[2]->y < sortedVertices[1]->y)
std::swap(sortedVertices[1], sortedVertices[2]);
}
void ScreenTriangle::Draw(const TriDrawTriangleArgs *args, PolyTriangleThreadData *thread)
{
using namespace TriScreenDrawerModes;
// Sort vertices by Y position
ShadedTriVertex *sortedVertices[3];
SortVertices(args, sortedVertices);
int clipleft = 0;
int cliptop = MAX(thread->viewport_y, thread->numa_start_y);
int clipright = thread->dest_width;
int clipbottom = MIN(thread->dest_height, thread->numa_end_y);
int topY = (int)(sortedVertices[0]->y + 0.5f);
int midY = (int)(sortedVertices[1]->y + 0.5f);
int bottomY = (int)(sortedVertices[2]->y + 0.5f);
topY = MAX(topY, cliptop);
midY = MIN(midY, clipbottom);
bottomY = MIN(bottomY, clipbottom);
if (topY >= bottomY)
return;
topY += thread->skipped_by_thread(topY);
int num_cores = thread->num_cores;
// Find start/end X positions for each line covered by the triangle:
int16_t edges[MAXHEIGHT * 2];
int y = topY;
float longDX = sortedVertices[2]->x - sortedVertices[0]->x;
float longDY = sortedVertices[2]->y - sortedVertices[0]->y;
float longStep = longDX / longDY;
float longPos = sortedVertices[0]->x + longStep * (y + 0.5f - sortedVertices[0]->y) + 0.5f;
longStep *= num_cores;
if (y < midY)
{
float shortDX = sortedVertices[1]->x - sortedVertices[0]->x;
float shortDY = sortedVertices[1]->y - sortedVertices[0]->y;
float shortStep = shortDX / shortDY;
float shortPos = sortedVertices[0]->x + shortStep * (y + 0.5f - sortedVertices[0]->y) + 0.5f;
shortStep *= num_cores;
while (y < midY)
{
int x0 = (int)shortPos;
int x1 = (int)longPos;
if (x1 < x0) std::swap(x0, x1);
x0 = clamp(x0, clipleft, clipright);
x1 = clamp(x1, clipleft, clipright);
edges[y << 1] = x0;
edges[(y << 1) + 1] = x1;
shortPos += shortStep;
longPos += longStep;
y += num_cores;
}
}
if (y < bottomY)
{
float shortDX = sortedVertices[2]->x - sortedVertices[1]->x;
float shortDY = sortedVertices[2]->y - sortedVertices[1]->y;
float shortStep = shortDX / shortDY;
float shortPos = sortedVertices[1]->x + shortStep * (y + 0.5f - sortedVertices[1]->y) + 0.5f;
shortStep *= num_cores;
while (y < bottomY)
{
int x0 = (int)shortPos;
int x1 = (int)longPos;
if (x1 < x0) std::swap(x0, x1);
x0 = clamp(x0, clipleft, clipright);
x1 = clamp(x1, clipleft, clipright);
edges[y << 1] = x0;
edges[(y << 1) + 1] = x1;
shortPos += shortStep;
longPos += longStep;
y += num_cores;
}
}
int opt = 0;
if (args->uniforms->DepthTest()) opt |= SWTRI_DepthTest;
if (args->uniforms->StencilTest()) opt |= SWTRI_StencilTest;
if (args->uniforms->WriteColor()) opt |= SWTRI_WriteColor;
if (args->uniforms->WriteDepth()) opt |= SWTRI_WriteDepth;
if (args->uniforms->WriteStencil()) opt |= SWTRI_WriteStencil;
TriangleDrawers[opt](args, thread, edges, topY, bottomY);
}
template<typename OptT>
void DrawTriangle(const TriDrawTriangleArgs *args, PolyTriangleThreadData *thread, int16_t *edges, int topY, int bottomY)
{
using namespace TriScreenDrawerModes;
void(*drawfunc)(int y, int x0, int x1, const TriDrawTriangleArgs *args, PolyTriangleThreadData *thread);
float stepXW, v1X, v1Y, v1W, posXW;
uint8_t stencilTestValue, stencilWriteValue;
float *zbuffer;
float *zbufferLine;
uint8_t *stencilbuffer;
uint8_t *stencilLine;
int pitch;
if (OptT::Flags & SWTRI_WriteColor)
{
int bmode = (int)args->uniforms->BlendMode();
drawfunc = thread->dest_bgra ? ScreenTriangle::SpanDrawers32[bmode] : ScreenTriangle::SpanDrawers8[bmode];
}
if ((OptT::Flags & SWTRI_DepthTest) || (OptT::Flags & SWTRI_WriteDepth))
{
stepXW = args->gradientX.W;
v1X = args->v1->x;
v1Y = args->v1->y;
v1W = args->v1->w;
zbuffer = PolyZBuffer::Instance()->Values();
}
if ((OptT::Flags & SWTRI_StencilTest) || (OptT::Flags & SWTRI_WriteStencil))
{
stencilbuffer = PolyStencilBuffer::Instance()->Values();
}
if ((OptT::Flags & SWTRI_StencilTest) || (OptT::Flags & SWTRI_WriteStencil) || (OptT::Flags & SWTRI_DepthTest) || (OptT::Flags & SWTRI_WriteDepth))
pitch = PolyStencilBuffer::Instance()->Width();
if (OptT::Flags & SWTRI_StencilTest)
stencilTestValue = args->uniforms->StencilTestValue();
if (OptT::Flags & SWTRI_WriteStencil)
stencilWriteValue = args->uniforms->StencilWriteValue();
float weaponWOffset;
if ((OptT::Flags & SWTRI_DepthTest) || (OptT::Flags & SWTRI_WriteDepth))
{
weaponWOffset = thread->weaponScene ? 1.0f : 0.0f;
}
int num_cores = thread->num_cores;
for (int y = topY; y < bottomY; y += num_cores)
{
int x = edges[y << 1];
int xend = edges[(y << 1) + 1];
if ((OptT::Flags & SWTRI_StencilTest) || (OptT::Flags & SWTRI_WriteStencil))
stencilLine = stencilbuffer + pitch * y;
if ((OptT::Flags & SWTRI_DepthTest) || (OptT::Flags & SWTRI_WriteDepth))
{
zbufferLine = zbuffer + pitch * y;
float startX = x + (0.5f - v1X);
float startY = y + (0.5f - v1Y);
posXW = v1W + stepXW * startX + args->gradientY.W * startY + weaponWOffset;
}
#ifndef NO_SSE
__m128 mstepXW, mfirstStepXW;
if ((OptT::Flags & SWTRI_DepthTest) || (OptT::Flags & SWTRI_WriteDepth))
{
mstepXW = _mm_set1_ps(stepXW * 4.0f);
mfirstStepXW = _mm_setr_ps(0.0f, stepXW, stepXW + stepXW, stepXW + stepXW + stepXW);
}
while (x < xend)
{
int xstart = x;
if ((OptT::Flags & SWTRI_DepthTest) && (OptT::Flags & SWTRI_StencilTest))
{
int xendsse = x + ((xend - x) / 4);
__m128 mposXW = _mm_add_ps(_mm_set1_ps(posXW), mfirstStepXW);
while (x < xendsse &&
_mm_movemask_ps(_mm_cmple_ps(_mm_loadu_ps(zbufferLine + x), mposXW)) == 15 &&
stencilLine[x] == stencilTestValue &&
stencilLine[x + 1] == stencilTestValue &&
stencilLine[x + 2] == stencilTestValue &&
stencilLine[x + 3] == stencilTestValue)
{
if (OptT::Flags & SWTRI_WriteDepth)
_mm_storeu_ps(zbufferLine + x, mposXW);
mposXW = _mm_add_ps(mposXW, mstepXW);
x += 4;
}
posXW = _mm_cvtss_f32(mposXW);
while (zbufferLine[x] <= posXW && stencilLine[x] == stencilTestValue && x < xend)
{
if (OptT::Flags & SWTRI_WriteDepth)
zbufferLine[x] = posXW;
posXW += stepXW;
x++;
}
}
else if (OptT::Flags & SWTRI_DepthTest)
{
int xendsse = x + ((xend - x) / 4);
__m128 mposXW = _mm_add_ps(_mm_set1_ps(posXW), mfirstStepXW);
while (x < xendsse && _mm_movemask_ps(_mm_cmple_ps(_mm_loadu_ps(zbufferLine + x), mposXW)) == 15)
{
if (OptT::Flags & SWTRI_WriteDepth)
_mm_storeu_ps(zbufferLine + x, mposXW);
mposXW = _mm_add_ps(mposXW, mstepXW);
x += 4;
}
posXW = _mm_cvtss_f32(mposXW);
while (zbufferLine[x] <= posXW && x < xend)
{
if (OptT::Flags & SWTRI_WriteDepth)
zbufferLine[x] = posXW;
posXW += stepXW;
x++;
}
}
else if (OptT::Flags & SWTRI_StencilTest)
{
int xendsse = x + ((xend - x) / 16);
while (x < xendsse && _mm_movemask_epi8(_mm_cmpeq_epi8(_mm_loadu_si128((const __m128i*)&stencilLine[x]), _mm_set1_epi8(stencilTestValue))) == 0xffff)
{
x += 16;
}
while (stencilLine[x] == stencilTestValue && x < xend)
x++;
}
else
{
x = xend;
}
if (x > xstart)
{
if (OptT::Flags & SWTRI_WriteColor)
drawfunc(y, xstart, x, args, thread);
if (OptT::Flags & SWTRI_WriteStencil)
{
int i = xstart;
int xendsse = xstart + ((x - xstart) / 16);
while (i < xendsse)
{
_mm_storeu_si128((__m128i*)&stencilLine[i], _mm_set1_epi8(stencilWriteValue));
i += 16;
}
while (i < x)
stencilLine[i++] = stencilWriteValue;
}
if (!(OptT::Flags & SWTRI_DepthTest) && (OptT::Flags & SWTRI_WriteDepth))
{
for (int i = xstart; i < x; i++)
{
zbufferLine[i] = posXW;
posXW += stepXW;
}
}
}
if ((OptT::Flags & SWTRI_DepthTest) && (OptT::Flags & SWTRI_StencilTest))
{
int xendsse = x + ((xend - x) / 4);
__m128 mposXW = _mm_add_ps(_mm_set1_ps(posXW), mfirstStepXW);
while (x < xendsse &&
(_mm_movemask_ps(_mm_cmple_ps(_mm_loadu_ps(zbufferLine + x), mposXW)) == 0 ||
stencilLine[x] != stencilTestValue ||
stencilLine[x + 1] != stencilTestValue ||
stencilLine[x + 2] != stencilTestValue ||
stencilLine[x + 3] != stencilTestValue))
{
mposXW = _mm_add_ps(mposXW, mstepXW);
x += 4;
}
posXW = _mm_cvtss_f32(mposXW);
while ((zbufferLine[x] > posXW || stencilLine[x] != stencilTestValue) && x < xend)
{
posXW += stepXW;
x++;
}
}
else if (OptT::Flags & SWTRI_DepthTest)
{
int xendsse = x + ((xend - x) / 4);
__m128 mposXW = _mm_add_ps(_mm_set1_ps(posXW), mfirstStepXW);
while (x < xendsse && _mm_movemask_ps(_mm_cmple_ps(_mm_loadu_ps(zbufferLine + x), mposXW)) == 0)
{
mposXW = _mm_add_ps(mposXW, mstepXW);
x += 4;
}
posXW = _mm_cvtss_f32(mposXW);
while (zbufferLine[x] > posXW && x < xend)
{
posXW += stepXW;
x++;
}
}
else if (OptT::Flags & SWTRI_StencilTest)
{
int xendsse = x + ((xend - x) / 16);
while (x < xendsse && _mm_movemask_epi8(_mm_cmpeq_epi8(_mm_loadu_si128((const __m128i*)&stencilLine[x]), _mm_set1_epi8(stencilTestValue))) == 0)
{
x += 16;
}
while (stencilLine[x] != stencilTestValue && x < xend)
{
x++;
}
}
}
#else
while (x < xend)
{
int xstart = x;
if ((OptT::Flags & SWTRI_DepthTest) && (OptT::Flags & SWTRI_StencilTest))
{
while (zbufferLine[x] <= posXW && stencilLine[x] == stencilTestValue && x < xend)
{
if (OptT::Flags & SWTRI_WriteDepth)
zbufferLine[x] = posXW;
posXW += stepXW;
x++;
}
}
else if (OptT::Flags & SWTRI_DepthTest)
{
while (zbufferLine[x] <= posXW && x < xend)
{
if (OptT::Flags & SWTRI_WriteDepth)
zbufferLine[x] = posXW;
posXW += stepXW;
x++;
}
}
else if (OptT::Flags & SWTRI_StencilTest)
{
while (stencilLine[x] == stencilTestValue && x < xend)
x++;
}
else
{
x = xend;
}
if (x > xstart)
{
if (OptT::Flags & SWTRI_WriteColor)
drawfunc(y, xstart, x, args, thread);
if (OptT::Flags & SWTRI_WriteStencil)
{
for (int i = xstart; i < x; i++)
stencilLine[i] = stencilWriteValue;
}
if (!(OptT::Flags & SWTRI_DepthTest) && (OptT::Flags & SWTRI_WriteDepth))
{
for (int i = xstart; i < x; i++)
{
zbufferLine[i] = posXW;
posXW += stepXW;
}
}
}
if ((OptT::Flags & SWTRI_DepthTest) && (OptT::Flags & SWTRI_StencilTest))
{
while ((zbufferLine[x] > posXW || stencilLine[x] != stencilTestValue) && x < xend)
{
posXW += stepXW;
x++;
}
}
else if (OptT::Flags & SWTRI_DepthTest)
{
while (zbufferLine[x] > posXW && x < xend)
{
posXW += stepXW;
x++;
}
}
else if (OptT::Flags & SWTRI_StencilTest)
{
while (stencilLine[x] != stencilTestValue && x < xend)
{
x++;
}
}
}
#endif
}
}
template<typename ModeT, typename OptT, int BitsPerPixel>
void StepSpan(int y, int x0, int x1, const TriDrawTriangleArgs *args, PolyTriangleThreadData *thread)
{
using namespace TriScreenDrawerModes;
float v1X, v1Y, v1W, v1U, v1V, v1WorldX, v1WorldY, v1WorldZ;
float startX, startY;
float stepW, stepU, stepV, stepWorldX, stepWorldY, stepWorldZ;
float posW, posU, posV, posWorldX, posWorldY, posWorldZ;
int texWidth, texHeight;
uint32_t light;
fixed_t shade, lightpos, lightstep;
float *worldposX = thread->worldposX;
float *worldposY = thread->worldposY;
float *worldposZ = thread->worldposZ;
uint32_t *texel = thread->texel;
int32_t *texelV = thread->texelV;
uint16_t *lightarray = thread->lightarray;
uint32_t *dynlights = thread->dynlights;
v1X = args->v1->x;
v1Y = args->v1->y;
v1W = args->v1->w;
v1U = args->v1->u * v1W;
v1V = args->v1->v * v1W;
startX = x0 + (0.5f - v1X);
startY = y + (0.5f - v1Y);
stepW = args->gradientX.W;
stepU = args->gradientX.U;
stepV = args->gradientX.V;
posW = v1W + stepW * startX + args->gradientY.W * startY;
posU = v1U + stepU * startX + args->gradientY.U * startY;
posV = v1V + stepV * startX + args->gradientY.V * startY;
if (!(ModeT::SWFlags & SWSTYLEF_Fill) && !(ModeT::SWFlags & SWSTYLEF_FogBoundary))
{
texWidth = args->uniforms->TextureWidth();
texHeight = args->uniforms->TextureHeight();
}
if (OptT::Flags & SWOPT_DynLights)
{
v1WorldX = args->v1->worldX * v1W;
v1WorldY = args->v1->worldY * v1W;
v1WorldZ = args->v1->worldZ * v1W;
stepWorldX = args->gradientX.WorldX;
stepWorldY = args->gradientX.WorldY;
stepWorldZ = args->gradientX.WorldZ;
posWorldX = v1WorldX + stepWorldX * startX + args->gradientY.WorldX * startY;
posWorldY = v1WorldY + stepWorldY * startX + args->gradientY.WorldY * startY;
posWorldZ = v1WorldZ + stepWorldZ * startX + args->gradientY.WorldZ * startY;
}
if (!(OptT::Flags & SWOPT_FixedLight))
{
float globVis = args->uniforms->GlobVis() * (1.0f / 32.0f);
light = args->uniforms->Light();
shade = (fixed_t)((2.0f - (light + 12.0f) / 128.0f) * (float)FRACUNIT);
lightpos = (fixed_t)(globVis * posW * (float)FRACUNIT);
lightstep = (fixed_t)(globVis * stepW * (float)FRACUNIT);
fixed_t maxvis = 24 * FRACUNIT / 32;
fixed_t maxlight = 31 * FRACUNIT / 32;
fixed_t lightend = lightpos + lightstep * (x1 - x0);
if (lightpos < maxvis && shade >= lightpos && shade - lightpos <= maxlight &&
lightend < maxvis && shade >= lightend && shade - lightend <= maxlight)
{
if (BitsPerPixel == 32)
{
lightpos += FRACUNIT - shade;
for (int x = x0; x < x1; x++)
{
lightarray[x] = lightpos >> 8;
lightpos += lightstep;
}
}
else
{
lightpos = shade - lightpos;
for (int x = x0; x < x1; x++)
{
lightarray[x] = (lightpos >> 3) & 0xffffff00;
lightpos -= lightstep;
}
}
}
else
{
if (BitsPerPixel == 32)
{
for (int x = x0; x < x1; x++)
{
lightarray[x] = (FRACUNIT - clamp<fixed_t>(shade - MIN(maxvis, lightpos), 0, maxlight)) >> 8;
lightpos += lightstep;
}
}
else
{
for (int x = x0; x < x1; x++)
{
lightarray[x] = (clamp<fixed_t>(shade - MIN(maxvis, lightpos), 0, maxlight) >> 3) & 0xffffff00;
lightpos += lightstep;
}
}
}
}
#ifndef NO_SSE
__m128 mposW, mposU, mposV, mstepW, mstepU, mstepV;
__m128 mposWorldX, mposWorldY, mposWorldZ, mstepWorldX, mstepWorldY, mstepWorldZ;
__m128i mtexMul1, mtexMul2;
#define SETUP_STEP_SSE(mpos,mstep,pos,step) \
mstep = _mm_load_ss(&step); \
mpos = _mm_load_ss(&pos); \
mpos = _mm_shuffle_ps(mpos, mpos, _MM_SHUFFLE(2, 1, 0, 0)); \
mpos = _mm_add_ss(mpos, mstep); \
mpos = _mm_shuffle_ps(mpos, mpos, _MM_SHUFFLE(2, 1, 0, 0)); \
mpos = _mm_add_ss(mpos, mstep); \
mpos = _mm_shuffle_ps(mpos, mpos, _MM_SHUFFLE(2, 1, 0, 0)); \
mpos = _mm_add_ss(mpos, mstep); \
mpos = _mm_shuffle_ps(mpos, mpos, _MM_SHUFFLE(0, 1, 2, 3)); \
mstep = _mm_mul_ss(mstep, _mm_set1_ps(4.0f)); \
mstep = _mm_shuffle_ps(mstep, mstep, _MM_SHUFFLE(0, 0, 0, 0));
SETUP_STEP_SSE(mposW, mstepW, posW, stepW);
if (OptT::Flags & SWOPT_DynLights)
{
SETUP_STEP_SSE(mposWorldX, mstepWorldX, posWorldX, stepWorldX);
SETUP_STEP_SSE(mposWorldY, mstepWorldY, posWorldY, stepWorldY);
SETUP_STEP_SSE(mposWorldZ, mstepWorldZ, posWorldZ, stepWorldZ);
}
if (!(ModeT::SWFlags & SWSTYLEF_Fill) && !(ModeT::SWFlags & SWSTYLEF_FogBoundary))
{
SETUP_STEP_SSE(mposU, mstepU, posU, stepU);
SETUP_STEP_SSE(mposV, mstepV, posV, stepV);
mtexMul1 = _mm_setr_epi16(texWidth, texWidth, texWidth, texWidth, texHeight, texHeight, texHeight, texHeight);
mtexMul2 = _mm_setr_epi16(texHeight, texHeight, texHeight, texHeight, 1, 1, 1, 1);
}
#undef SETUP_STEP_SSE
for (int x = x0; x < x1; x += 4)
{
__m128 rcp_posW = _mm_div_ps(_mm_set1_ps(1.0f), mposW); // precision of _mm_rcp_ps(mposW) is terrible!
if (OptT::Flags & SWOPT_DynLights)
{
_mm_storeu_ps(&worldposX[x], _mm_mul_ps(mposWorldX, rcp_posW));
_mm_storeu_ps(&worldposY[x], _mm_mul_ps(mposWorldY, rcp_posW));
_mm_storeu_ps(&worldposZ[x], _mm_mul_ps(mposWorldZ, rcp_posW));
mposWorldX = _mm_add_ps(mposWorldX, mstepWorldX);
mposWorldY = _mm_add_ps(mposWorldY, mstepWorldY);
mposWorldZ = _mm_add_ps(mposWorldZ, mstepWorldZ);
}
if (!(ModeT::SWFlags & SWSTYLEF_Fill) && !(ModeT::SWFlags & SWSTYLEF_FogBoundary))
{
__m128 rcpW = _mm_mul_ps(_mm_set1_ps(0x01000000), rcp_posW);
__m128i u = _mm_cvtps_epi32(_mm_mul_ps(mposU, rcpW));
__m128i v = _mm_cvtps_epi32(_mm_mul_ps(mposV, rcpW));
_mm_storeu_si128((__m128i*)&texelV[x], v);
__m128i texelX = _mm_srli_epi32(_mm_slli_epi32(u, 8), 17);
__m128i texelY = _mm_srli_epi32(_mm_slli_epi32(v, 8), 17);
__m128i texelXY = _mm_mulhi_epu16(_mm_slli_epi16(_mm_packs_epi32(texelX, texelY), 1), mtexMul1);
__m128i texlo = _mm_mullo_epi16(texelXY, mtexMul2);
__m128i texhi = _mm_mulhi_epi16(texelXY, mtexMul2);
texelX = _mm_unpacklo_epi16(texlo, texhi);
texelY = _mm_unpackhi_epi16(texlo, texhi);
_mm_storeu_si128((__m128i*)&texel[x], _mm_add_epi32(texelX, texelY));
mposU = _mm_add_ps(mposU, mstepU);
mposV = _mm_add_ps(mposV, mstepV);
}
mposW = _mm_add_ps(mposW, mstepW);
}
#else
for (int x = x0; x < x1; x++)
{
if (OptT::Flags & SWOPT_DynLights)
{
float rcp_posW = 1.0f / posW;
worldposX[x] = posWorldX * rcp_posW;
worldposY[x] = posWorldY * rcp_posW;
worldposZ[x] = posWorldZ * rcp_posW;
posWorldX += stepWorldX;
posWorldY += stepWorldY;
posWorldZ += stepWorldZ;
}
if (!(ModeT::SWFlags & SWSTYLEF_Fill) && !(ModeT::SWFlags & SWSTYLEF_FogBoundary))
{
float rcpW = 0x01000000 / posW;
int32_t u = (int32_t)(posU * rcpW);
int32_t v = (int32_t)(posV * rcpW);
uint32_t texelX = ((((uint32_t)u << 8) >> 16) * texWidth) >> 16;
uint32_t texelY = ((((uint32_t)v << 8) >> 16) * texHeight) >> 16;
texel[x] = texelX * texHeight + texelY;
texelV[x] = v;
posU += stepU;
posV += stepV;
}
posW += stepW;
}
#endif
if (OptT::Flags & SWOPT_DynLights)
{
PolyLight *lights;
int num_lights;
float worldnormalX, worldnormalY, worldnormalZ;
uint32_t dynlightcolor;
lights = args->uniforms->Lights();
num_lights = args->uniforms->NumLights();
worldnormalX = args->uniforms->Normal().X;
worldnormalY = args->uniforms->Normal().Y;
worldnormalZ = args->uniforms->Normal().Z;
dynlightcolor = args->uniforms->DynLightColor();
// The normal vector cannot be uniform when drawing models. Calculate and use the face normal:
if (worldnormalX == 0.0f && worldnormalY == 0.0f && worldnormalZ == 0.0f)
{
float dx1 = args->v2->worldX - args->v1->worldX;
float dy1 = args->v2->worldY - args->v1->worldY;
float dz1 = args->v2->worldZ - args->v1->worldZ;
float dx2 = args->v3->worldX - args->v1->worldX;
float dy2 = args->v3->worldY - args->v1->worldY;
float dz2 = args->v3->worldZ - args->v1->worldZ;
worldnormalX = dy1 * dz2 - dz1 * dy2;
worldnormalY = dz1 * dx2 - dx1 * dz2;
worldnormalZ = dx1 * dy2 - dy1 * dx2;
float lensqr = worldnormalX * worldnormalX + worldnormalY * worldnormalY + worldnormalZ * worldnormalZ;
#ifndef NO_SSE
float rcplen = _mm_cvtss_f32(_mm_rsqrt_ss(_mm_set_ss(lensqr)));
#else
float rcplen = 1.0f / sqrt(lensqr);
#endif
worldnormalX *= rcplen;
worldnormalY *= rcplen;
worldnormalZ *= rcplen;
}
#ifndef NO_SSE
__m128 mworldnormalX = _mm_set1_ps(worldnormalX);
__m128 mworldnormalY = _mm_set1_ps(worldnormalY);
__m128 mworldnormalZ = _mm_set1_ps(worldnormalZ);
for (int x = x0; x < x1; x += 4)
{
__m128i litlo = _mm_shuffle_epi32(_mm_unpacklo_epi8(_mm_cvtsi32_si128(dynlightcolor), _mm_setzero_si128()), _MM_SHUFFLE(1, 0, 1, 0));
__m128i lithi = litlo;
for (int i = 0; i < num_lights; i++)
{
__m128 lightposX = _mm_set1_ps(lights[i].x);
__m128 lightposY = _mm_set1_ps(lights[i].y);
__m128 lightposZ = _mm_set1_ps(lights[i].z);
__m128 light_radius = _mm_set1_ps(lights[i].radius);
__m128i light_color = _mm_shuffle_epi32(_mm_unpacklo_epi8(_mm_cvtsi32_si128(lights[i].color), _mm_setzero_si128()), _MM_SHUFFLE(1, 0, 1, 0));
__m128 is_attenuated = _mm_cmplt_ps(light_radius, _mm_setzero_ps());
light_radius = _mm_andnot_ps(_mm_set1_ps(-0.0f), light_radius); // clear sign bit
// L = light-pos
// dist = sqrt(dot(L, L))
// distance_attenuation = 1 - MIN(dist * (1/radius), 1)
__m128 Lx = _mm_sub_ps(lightposX, _mm_loadu_ps(&worldposX[x]));
__m128 Ly = _mm_sub_ps(lightposY, _mm_loadu_ps(&worldposY[x]));
__m128 Lz = _mm_sub_ps(lightposZ, _mm_loadu_ps(&worldposZ[x]));
__m128 dist2 = _mm_add_ps(_mm_mul_ps(Lx, Lx), _mm_add_ps(_mm_mul_ps(Ly, Ly), _mm_mul_ps(Lz, Lz)));
__m128 rcp_dist = _mm_rsqrt_ps(dist2);
__m128 dist = _mm_mul_ps(dist2, rcp_dist);
__m128 distance_attenuation = _mm_sub_ps(_mm_set1_ps(256.0f), _mm_min_ps(_mm_mul_ps(dist, light_radius), _mm_set1_ps(256.0f)));
// The simple light type
__m128 simple_attenuation = distance_attenuation;
// The point light type
// diffuse = max(dot(N,normalize(L)),0) * attenuation
Lx = _mm_mul_ps(Lx, rcp_dist);
Ly = _mm_mul_ps(Ly, rcp_dist);
Lz = _mm_mul_ps(Lz, rcp_dist);
__m128 dotNL = _mm_add_ps(_mm_add_ps(_mm_mul_ps(mworldnormalX, Lx), _mm_mul_ps(mworldnormalY, Ly)), _mm_mul_ps(mworldnormalZ, Lz));
__m128 point_attenuation = _mm_mul_ps(_mm_max_ps(dotNL, _mm_setzero_ps()), distance_attenuation);
__m128i attenuation = _mm_cvtps_epi32(_mm_or_ps(_mm_and_ps(is_attenuated, point_attenuation), _mm_andnot_ps(is_attenuated, simple_attenuation)));
attenuation = _mm_shufflehi_epi16(_mm_shufflelo_epi16(attenuation, _MM_SHUFFLE(2, 2, 0, 0)), _MM_SHUFFLE(2, 2, 0, 0));
__m128i attenlo = _mm_shuffle_epi32(attenuation, _MM_SHUFFLE(1, 1, 0, 0));
__m128i attenhi = _mm_shuffle_epi32(attenuation, _MM_SHUFFLE(3, 3, 2, 2));
litlo = _mm_add_epi16(litlo, _mm_srli_epi16(_mm_mullo_epi16(light_color, attenlo), 8));
lithi = _mm_add_epi16(lithi, _mm_srli_epi16(_mm_mullo_epi16(light_color, attenhi), 8));
}
_mm_storeu_si128((__m128i*)&dynlights[x], _mm_packus_epi16(litlo, lithi));
}
#else
for (int x = x0; x < x1; x++)
{
uint32_t lit_r = RPART(dynlightcolor);
uint32_t lit_g = GPART(dynlightcolor);
uint32_t lit_b = BPART(dynlightcolor);
for (int i = 0; i < num_lights; i++)
{
float lightposX = lights[i].x;
float lightposY = lights[i].y;
float lightposZ = lights[i].z;
float light_radius = lights[i].radius;
uint32_t light_color = lights[i].color;
bool is_attenuated = light_radius < 0.0f;
if (is_attenuated)
light_radius = -light_radius;
// L = light-pos
// dist = sqrt(dot(L, L))
// distance_attenuation = 1 - MIN(dist * (1/radius), 1)
float Lx = lightposX - worldposX[x];
float Ly = lightposY - worldposY[x];
float Lz = lightposZ - worldposZ[x];
float dist2 = Lx * Lx + Ly * Ly + Lz * Lz;
#ifdef NO_SSE
//float rcp_dist = 1.0f / sqrt(dist2);
float rcp_dist = 1.0f / (dist2 * 0.01f);
#else
float rcp_dist = _mm_cvtss_f32(_mm_rsqrt_ss(_mm_set_ss(dist2)));
#endif
float dist = dist2 * rcp_dist;
float distance_attenuation = 256.0f - MIN(dist * light_radius, 256.0f);
// The simple light type
float simple_attenuation = distance_attenuation;
// The point light type
// diffuse = max(dot(N,normalize(L)),0) * attenuation
Lx *= rcp_dist;
Ly *= rcp_dist;
Lz *= rcp_dist;
float dotNL = worldnormalX * Lx + worldnormalY * Ly + worldnormalZ * Lz;
float point_attenuation = MAX(dotNL, 0.0f) * distance_attenuation;
uint32_t attenuation = (uint32_t)(is_attenuated ? (int32_t)point_attenuation : (int32_t)simple_attenuation);
lit_r += (RPART(light_color) * attenuation) >> 8;
lit_g += (GPART(light_color) * attenuation) >> 8;
lit_b += (BPART(light_color) * attenuation) >> 8;
}
lit_r = MIN<uint32_t>(lit_r, 255);
lit_g = MIN<uint32_t>(lit_g, 255);
lit_b = MIN<uint32_t>(lit_b, 255);
dynlights[x] = MAKEARGB(255, lit_r, lit_g, lit_b);
}
#endif
}
}
template<typename ModeT, typename OptT>
void DrawSpanOpt32(int y, int x0, int x1, const TriDrawTriangleArgs *args, PolyTriangleThreadData *thread)
{
using namespace TriScreenDrawerModes;
StepSpan<ModeT, OptT, 32>(y, x0, x1, args, thread);
uint32_t fixedlight;
uint32_t shade_fade_r, shade_fade_g, shade_fade_b, shade_light_r, shade_light_g, shade_light_b, desaturate, inv_desaturate;
fixed_t fuzzscale;
int _fuzzpos;
const uint32_t *texPixels, *translation;
uint32_t fillcolor;
int actoralpha;
uint32_t *texel = thread->texel;
int32_t *texelV = thread->texelV;
uint16_t *lightarray = thread->lightarray;
uint32_t *dynlights = thread->dynlights;
if (!(ModeT::SWFlags & SWSTYLEF_Fill) && !(ModeT::SWFlags & SWSTYLEF_FogBoundary))
{
texPixels = (const uint32_t*)args->uniforms->TexturePixels();
}
if (ModeT::SWFlags & SWSTYLEF_Translated)
{
translation = (const uint32_t*)args->uniforms->Translation();
}
if ((ModeT::SWFlags & SWSTYLEF_Fill) || (ModeT::SWFlags & SWSTYLEF_Skycap) || (ModeT::Flags & STYLEF_ColorIsFixed))
{
fillcolor = args->uniforms->Color();
}
if (!(ModeT::Flags & STYLEF_Alpha1))
{
actoralpha = args->uniforms->Alpha();
}
if (OptT::Flags & SWOPT_FixedLight)
{
fixedlight = args->uniforms->Light();
fixedlight += fixedlight >> 7; // 255 -> 256
}
if (OptT::Flags & SWOPT_ColoredFog)
{
shade_fade_r = args->uniforms->ShadeFadeRed();
shade_fade_g = args->uniforms->ShadeFadeGreen();
shade_fade_b = args->uniforms->ShadeFadeBlue();
shade_light_r = args->uniforms->ShadeLightRed();
shade_light_g = args->uniforms->ShadeLightGreen();
shade_light_b = args->uniforms->ShadeLightBlue();
desaturate = args->uniforms->ShadeDesaturate();
inv_desaturate = 256 - desaturate;
}
if (ModeT::BlendOp == STYLEOP_Fuzz)
{
fuzzscale = (200 << FRACBITS) / viewheight;
_fuzzpos = swrenderer::fuzzpos;
}
uint32_t *dest = (uint32_t*)thread->dest;
uint32_t *destLine = dest + thread->dest_pitch * y;
int sseend = x0;
#ifndef NO_SSE
if (ModeT::BlendOp == STYLEOP_Add &&
ModeT::BlendSrc == STYLEALPHA_One &&
ModeT::BlendDest == STYLEALPHA_Zero &&
(ModeT::Flags & STYLEF_Alpha1) &&
!(OptT::Flags & SWOPT_ColoredFog) &&
!(ModeT::Flags & STYLEF_RedIsAlpha) &&
!(ModeT::SWFlags & SWSTYLEF_Skycap) &&
!(ModeT::SWFlags & SWSTYLEF_FogBoundary) &&
!(ModeT::SWFlags & SWSTYLEF_Fill))
{
sseend += (x1 - x0) / 2 * 2;
__m128i mlightshade;
if (OptT::Flags & SWOPT_FixedLight)
mlightshade = _mm_set1_epi16(fixedlight);
__m128i alphamask = _mm_set1_epi32(0xff000000);
for (int x = x0; x < sseend; x += 2)
{
__m128i mfg = _mm_unpacklo_epi8(_mm_setr_epi32(texPixels[texel[x]], texPixels[texel[x + 1]], 0, 0), _mm_setzero_si128());
if (!(OptT::Flags & SWOPT_FixedLight))
mlightshade = _mm_shuffle_epi32(_mm_shufflelo_epi16(_mm_cvtsi32_si128(*(int*)&lightarray[x]), _MM_SHUFFLE(1, 1, 0, 0)), _MM_SHUFFLE(1, 1, 0, 0));
if (OptT::Flags & SWOPT_DynLights)
{
__m128i mdynlight = _mm_unpacklo_epi8(_mm_loadl_epi64((const __m128i*)&dynlights[x]), _mm_setzero_si128());
mfg = _mm_srli_epi16(_mm_mullo_epi16(_mm_min_epi16(_mm_add_epi16(mdynlight, mlightshade), _mm_set1_epi16(256)), mfg), 8);
}
else
{
mfg = _mm_srli_epi16(_mm_mullo_epi16(mlightshade, mfg), 8);
}
_mm_storel_epi64((__m128i*)&destLine[x], _mm_or_si128(_mm_packus_epi16(mfg, _mm_setzero_si128()), alphamask));
}
}
#endif
for (int x = sseend; x < x1; x++)
{
if (ModeT::BlendOp == STYLEOP_Fuzz)
{
using namespace swrenderer;
unsigned int sampleshadeout = APART(texPixels[texel[x]]);
sampleshadeout += sampleshadeout >> 7; // 255 -> 256
int scaled_x = (x * fuzzscale) >> FRACBITS;
int fuzz_x = fuzz_random_x_offset[scaled_x % FUZZ_RANDOM_X_SIZE] + _fuzzpos;
fixed_t fuzzcount = FUZZTABLE << FRACBITS;
fixed_t fuzz = ((fuzz_x << FRACBITS) + y * fuzzscale) % fuzzcount;
unsigned int alpha = fuzzoffset[fuzz >> FRACBITS];
sampleshadeout = (sampleshadeout * alpha) >> 5;
uint32_t a = 256 - sampleshadeout;
uint32_t dest = destLine[x];
uint32_t out_r = (RPART(dest) * a) >> 8;
uint32_t out_g = (GPART(dest) * a) >> 8;
uint32_t out_b = (BPART(dest) * a) >> 8;
destLine[x] = MAKEARGB(255, out_r, out_g, out_b);
}
else if (ModeT::SWFlags & SWSTYLEF_Skycap)
{
uint32_t fg = texPixels[texel[x]];
int v = texelV[x];
int start_fade = 2; // How fast it should fade out
int alpha_top = clamp(v >> (16 - start_fade), 0, 256);
int alpha_bottom = clamp(((2 << 24) - v) >> (16 - start_fade), 0, 256);
int a = MIN(alpha_top, alpha_bottom);
int inv_a = 256 - a;
if (a == 256)
{
destLine[x] = fg;
}
else
{
uint32_t r = RPART(fg);
uint32_t g = GPART(fg);
uint32_t b = BPART(fg);
uint32_t fg_a = APART(fg);
uint32_t bg_red = RPART(fillcolor);
uint32_t bg_green = GPART(fillcolor);
uint32_t bg_blue = BPART(fillcolor);
r = (r * a + bg_red * inv_a + 127) >> 8;
g = (g * a + bg_green * inv_a + 127) >> 8;
b = (b * a + bg_blue * inv_a + 127) >> 8;
destLine[x] = MAKEARGB(255, r, g, b);
}
}
else if (ModeT::SWFlags & SWSTYLEF_FogBoundary)
{
uint32_t fg = destLine[x];
int lightshade;
if (OptT::Flags & SWOPT_FixedLight)
{
lightshade = fixedlight;