mirror of
https://github.com/ZDoom/qzdoom.git
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- Added subdivision coverage testing and an alternative triangle renderer for speed comparison
This commit is contained in:
Magnus Norddahl
parent
52634dbec1
commit
afab50b489
2 changed files with 357 additions and 14 deletions
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@ -47,10 +47,22 @@
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class TriangleBlock
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{
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public:
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TriangleBlock(const TriDrawTriangleArgs *args);
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void Loop(const TriDrawTriangleArgs *args, WorkerThreadData *thread);
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TriangleBlock(const TriDrawTriangleArgs *args, WorkerThreadData *thread);
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void Render();
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private:
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void RenderSubdivide(int x0, int y0, int x1, int y1);
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enum class CoverageModes { Full, Partial };
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struct CoverageFull { static const int Mode = (int)CoverageModes::Full; };
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struct CoveragePartial { static const int Mode = (int)CoverageModes::Partial; };
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template<typename CoverageMode>
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void RenderBlock(int x0, int y0, int x1, int y1);
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const TriDrawTriangleArgs *args;
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WorkerThreadData *thread;
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// Block size, standard 8x8 (must be power of two)
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static const int q = 8;
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@ -109,6 +121,14 @@ private:
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__m128i mDY31;
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#endif
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enum class CoverageResult
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{
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full,
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partial,
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none
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};
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CoverageResult AreaCoverageTest(int x0, int y0, int x1, int y1);
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void CoverageTest();
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void StencilEqualTest();
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void StencilGreaterEqualTest();
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@ -118,7 +138,7 @@ private:
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void DepthWrite(const TriDrawTriangleArgs *args);
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};
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TriangleBlock::TriangleBlock(const TriDrawTriangleArgs *args)
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TriangleBlock::TriangleBlock(const TriDrawTriangleArgs *args, WorkerThreadData *thread) : args(args), thread(thread)
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{
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const TriVertex &v1 = *args->v1;
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const TriVertex &v2 = *args->v2;
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@ -189,9 +209,11 @@ TriangleBlock::TriangleBlock(const TriDrawTriangleArgs *args)
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return;
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}
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// Start in corner of 8x8 block
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// Start and end in corner of 8x8 block
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minx &= ~(q - 1);
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miny &= ~(q - 1);
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maxx |= q - 1;
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maxy |= q - 1;
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// Half-edge constants
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C1 = DY12 * X1 - DX12 * Y1;
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@ -225,13 +247,59 @@ TriangleBlock::TriangleBlock(const TriDrawTriangleArgs *args)
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#endif
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}
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void TriangleBlock::Loop(const TriDrawTriangleArgs *args, WorkerThreadData *thread)
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void TriangleBlock::Render()
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{
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RenderSubdivide(minx / q, miny / q, (maxx + 1) / q, (maxy + 1) / q);
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}
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void TriangleBlock::RenderSubdivide(int x0, int y0, int x1, int y1)
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{
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CoverageResult result = AreaCoverageTest(x0 * q, y0 * q, x1 * q, y1 * q);
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if (result == CoverageResult::full)
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{
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RenderBlock<CoverageFull>(x0 * q, y0 * q, x1 * q, y1 * q);
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}
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else if (result == CoverageResult::partial)
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{
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bool doneX = x1 - x0 <= 8;
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bool doneY = y1 - y0 <= 8;
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if (doneX && doneY)
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{
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RenderBlock<CoveragePartial>(x0 * q, y0 * q, x1 * q, y1 * q);
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}
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else
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{
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int midx = (x0 + x1) >> 1;
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int midy = (y0 + y1) >> 1;
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if (doneX)
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{
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RenderSubdivide(x0, y0, x1, midy);
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RenderSubdivide(x0, midy, x1, y1);
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}
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else if (doneY)
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{
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RenderSubdivide(x0, y0, midx, y1);
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RenderSubdivide(midx, y0, x1, y1);
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}
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else
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{
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RenderSubdivide(x0, y0, midx, midy);
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RenderSubdivide(midx, y0, x1, midy);
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RenderSubdivide(x0, midy, midx, y1);
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RenderSubdivide(midx, midy, x1, y1);
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}
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}
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}
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}
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template<typename CoverageModeT>
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void TriangleBlock::RenderBlock(int x0, int y0, int x1, int y1)
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{
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// First block line for this thread
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int core = thread->core;
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int num_cores = thread->num_cores;
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int core_skip = (num_cores - ((miny / q) - core) % num_cores) % num_cores;
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int start_miny = miny + core_skip * q;
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int core_skip = (num_cores - ((y0 / q) - core) % num_cores) % num_cores;
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int start_miny = y0 + core_skip * q;
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bool depthTest = args->uniforms->DepthTest();
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bool writeColor = args->uniforms->WriteColor();
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@ -242,16 +310,24 @@ void TriangleBlock::Loop(const TriDrawTriangleArgs *args, WorkerThreadData *thre
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auto drawFunc = args->destBgra ? ScreenTriangle::TriDrawers32[bmode] : ScreenTriangle::TriDrawers8[bmode];
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// Loop through blocks
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for (int y = start_miny; y < maxy; y += q * num_cores)
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for (int y = start_miny; y < y1; y += q * num_cores)
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{
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for (int x = minx; x < maxx; x += q)
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for (int x = x0; x < x1; x += q)
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{
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X = x;
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Y = y;
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CoverageTest();
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if (Mask0 == 0 && Mask1 == 0)
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continue;
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if (CoverageModeT::Mode == (int)CoverageModes::Full)
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{
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Mask0 = 0xffffffff;
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Mask1 = 0xffffffff;
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}
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else
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{
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CoverageTest();
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if (Mask0 == 0 && Mask1 == 0)
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continue;
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}
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ClipTest();
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if (Mask0 == 0 && Mask1 == 0)
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@ -577,6 +653,47 @@ void TriangleBlock::StencilGreaterEqualTest()
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}
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}
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TriangleBlock::CoverageResult TriangleBlock::AreaCoverageTest(int x0, int y0, int x1, int y1)
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{
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// Corners of block
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x0 = x0 << 4;
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x1 = (x1 - 1) << 4;
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y0 = y0 << 4;
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y1 = (y1 - 1) << 4;
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// Evaluate half-space functions
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bool a00 = C1 + DX12 * y0 - DY12 * x0 > 0;
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bool a10 = C1 + DX12 * y0 - DY12 * x1 > 0;
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bool a01 = C1 + DX12 * y1 - DY12 * x0 > 0;
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bool a11 = C1 + DX12 * y1 - DY12 * x1 > 0;
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int a = (a00 << 0) | (a10 << 1) | (a01 << 2) | (a11 << 3);
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bool b00 = C2 + DX23 * y0 - DY23 * x0 > 0;
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bool b10 = C2 + DX23 * y0 - DY23 * x1 > 0;
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bool b01 = C2 + DX23 * y1 - DY23 * x0 > 0;
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bool b11 = C2 + DX23 * y1 - DY23 * x1 > 0;
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int b = (b00 << 0) | (b10 << 1) | (b01 << 2) | (b11 << 3);
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bool c00 = C3 + DX31 * y0 - DY31 * x0 > 0;
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bool c10 = C3 + DX31 * y0 - DY31 * x1 > 0;
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bool c01 = C3 + DX31 * y1 - DY31 * x0 > 0;
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bool c11 = C3 + DX31 * y1 - DY31 * x1 > 0;
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int c = (c00 << 0) | (c10 << 1) | (c01 << 2) | (c11 << 3);
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if (a == 0 || b == 0 || c == 0) // Skip block when outside an edge
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{
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return CoverageResult::none;
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}
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else if (a == 0xf && b == 0xf && c == 0xf) // Accept whole block when totally covered
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{
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return CoverageResult::full;
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}
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else // Partially covered block
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{
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return CoverageResult::partial;
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}
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}
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#ifdef NO_SSE
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void TriangleBlock::CoverageTest()
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@ -954,12 +1071,231 @@ void TriangleBlock::DepthWrite(const TriDrawTriangleArgs *args)
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#endif
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#if 1
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void ScreenTriangle::Draw(const TriDrawTriangleArgs *args, WorkerThreadData *thread)
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{
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TriangleBlock block(args);
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block.Loop(args, thread);
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TriangleBlock block(args, thread);
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block.Render();
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}
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#else
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static void SortVertices(const TriDrawTriangleArgs *args, TriVertex **sortedVertices)
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{
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sortedVertices[0] = args->v1;
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sortedVertices[1] = args->v2;
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sortedVertices[2] = args->v3;
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if (sortedVertices[1]->y < sortedVertices[0]->y)
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std::swap(sortedVertices[0], sortedVertices[1]);
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if (sortedVertices[2]->y < sortedVertices[0]->y)
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std::swap(sortedVertices[0], sortedVertices[2]);
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if (sortedVertices[2]->y < sortedVertices[1]->y)
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std::swap(sortedVertices[1], sortedVertices[2]);
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}
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void ScreenTriangle::Draw(const TriDrawTriangleArgs *args, WorkerThreadData *thread)
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{
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// Sort vertices by Y position
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TriVertex *sortedVertices[3];
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SortVertices(args, sortedVertices);
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int clipright = args->clipright;
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int clipbottom = args->clipbottom;
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// Ranges that different triangles edges are active
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int topY = (int)(sortedVertices[0]->y + 0.5f);
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int midY = (int)(sortedVertices[1]->y + 0.5f);
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int bottomY = (int)(sortedVertices[2]->y + 0.5f);
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topY = MAX(topY, 0);
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midY = clamp(midY, 0, clipbottom);
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bottomY = MIN(bottomY, clipbottom);
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if (topY >= bottomY)
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return;
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// Find start/end X positions for each line covered by the triangle:
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int leftEdge[MAXHEIGHT];
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int rightEdge[MAXHEIGHT];
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float longDX = sortedVertices[2]->x - sortedVertices[0]->x;
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float longDY = sortedVertices[2]->y - sortedVertices[0]->y;
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float longStep = longDX / longDY;
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float longPos = sortedVertices[0]->x + longStep * (topY + 0.5f - sortedVertices[0]->y) + 0.5f;
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if (topY < midY)
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{
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float shortDX = sortedVertices[1]->x - sortedVertices[0]->x;
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float shortDY = sortedVertices[1]->y - sortedVertices[0]->y;
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float shortStep = shortDX / shortDY;
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float shortPos = sortedVertices[0]->x + shortStep * (topY + 0.5f - sortedVertices[0]->y) + 0.5f;
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for (int y = topY; y < midY; y++)
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{
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int x0 = (int)shortPos;
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int x1 = (int)longPos;
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if (x1 < x0) std::swap(x0, x1);
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x0 = clamp(x0, 0, clipright);
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x1 = clamp(x1, 0, clipright);
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leftEdge[y] = x0;
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rightEdge[y] = x1;
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shortPos += shortStep;
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longPos += longStep;
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}
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}
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if (midY < bottomY)
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{
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float shortDX = sortedVertices[2]->x - sortedVertices[1]->x;
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float shortDY = sortedVertices[2]->y - sortedVertices[1]->y;
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float shortStep = shortDX / shortDY;
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float shortPos = sortedVertices[1]->x + shortStep * (midY + 0.5f - sortedVertices[1]->y) + 0.5f;
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for (int y = midY; y < bottomY; y++)
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{
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int x0 = (int)shortPos;
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int x1 = (int)longPos;
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if (x1 < x0) std::swap(x0, x1);
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x0 = clamp(x0, 0, clipright);
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x1 = clamp(x1, 0, clipright);
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leftEdge[y] = x0;
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rightEdge[y] = x1;
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shortPos += shortStep;
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longPos += longStep;
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}
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}
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// Make variables local so the compiler can optimize without worrying about pointer aliasing
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bool depthTest = args->uniforms->DepthTest();
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bool writeColor = args->uniforms->WriteColor();
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bool writeStencil = args->uniforms->WriteStencil();
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bool writeDepth = args->uniforms->WriteDepth();
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uint8_t stencilTestValue = args->uniforms->StencilTestValue();
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uint8_t stencilWriteValue = args->uniforms->StencilWriteValue();
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int bmode = (int)args->uniforms->BlendMode();
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auto drawFunc = args->destBgra ? ScreenTriangle::TriDrawers32[bmode] : ScreenTriangle::TriDrawers8[bmode];
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uint8_t *dest = args->dest;
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uint8_t *stencilbuffer = args->stencilValues;
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uint32_t *stencilMasks = args->stencilMasks;
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float *zbuffer = args->zbuffer;
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int pitch = args->pitch;
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int stencilpitch = args->stencilPitch * 8;
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int color = ((int)(ptrdiff_t)args->uniforms->TexturePixels()) >> 2;
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float v1X = args->v1->x;
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float v1Y = args->v1->y;
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float v1W = args->v1->w;
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float v1U = args->v1->u * v1W;
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float v1V = args->v1->v * v1W;
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float stepXW = args->gradientX.W;
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float stepXU = args->gradientX.U;
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float stepXV = args->gradientX.V;
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float stepYW = args->gradientY.W;
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float stepYU = args->gradientY.U;
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float stepYV = args->gradientY.V;
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int texWidth = args->uniforms->TextureWidth();
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int texHeight = args->uniforms->TextureHeight();
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const uint8_t *texPixels = args->uniforms->TexturePixels();
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auto colormaps = args->uniforms->BaseColormap();
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bool is_fixed_light = args->uniforms->FixedLight();
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uint32_t lightmask = is_fixed_light ? 0 : 0xffffffff;
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uint32_t light = args->uniforms->Light();
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float shade = 2.0f - (light + 12.0f) / 128.0f;
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float globVis = args->uniforms->GlobVis() * (1.0f / 32.0f);
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light += light >> 7; // 255 -> 256
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// Draw the triangle:
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int num_cores = thread->num_cores;
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for (int y = topY + thread->skipped_by_thread(topY); y < bottomY; y += num_cores)
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{
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int x0 = leftEdge[y];
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int x1 = rightEdge[y];
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uint8_t *destLine = dest + pitch * y;
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uint8_t *stencilLine = stencilbuffer + stencilpitch * y;
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float *zbufferLine = zbuffer + stencilpitch * y;
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if ((stencilMasks[y] & 0xffffff00) == 0xffffff00) // First time we draw a line we have to clear the stencil buffer
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{
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memset(stencilLine, stencilMasks[y] & 0xff, stencilpitch);
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stencilMasks[y] = 0;
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}
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float posXW = v1W + stepXW * (x0 + (0.5f - v1X)) + stepYW * (y + (0.5f - v1Y));
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float posXU = v1U + stepXU * (x0 + (0.5f - v1X)) + stepYU * (y + (0.5f - v1Y));
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float posXV = v1V + stepXV * (x0 + (0.5f - v1X)) + stepYV * (y + (0.5f - v1Y));
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int x = x0;
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while (x < x1)
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{
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bool processPixel = true;
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if (!depthTest) // To do: make the stencil test use its own flag for comparison mode instead of abusing the depth test..
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{
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processPixel = stencilTestValue == stencilLine[x];
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}
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else
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{
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processPixel = stencilTestValue >= stencilLine[x] && zbufferLine[x] <= posXW;
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}
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if (processPixel) // Pixel is visible (passed stencil and depth tests)
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{
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if (writeColor)
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{
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if (texPixels)
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{
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float rcpW = 0x01000000 / posXW;
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int32_t u = (int32_t)(posXU * rcpW);
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int32_t v = (int32_t)(posXV * rcpW);
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uint32_t texelX = ((((uint32_t)u << 8) >> 16) * texWidth) >> 16;
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uint32_t texelY = ((((uint32_t)v << 8) >> 16) * texHeight) >> 16;
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uint8_t fgcolor = texPixels[texelX * texHeight + texelY];
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fixed_t lightpos = FRACUNIT - (int)(clamp(shade - MIN(24.0f / 32.0f, globVis * posXW), 0.0f, 31.0f / 32.0f) * (float)FRACUNIT);
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lightpos = (lightpos & lightmask) | ((light << 8) & ~lightmask);
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int lightshade = lightpos >> 8;
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lightshade = ((256 - lightshade) * NUMCOLORMAPS) & 0xffffff00;
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uint8_t shadedfg = colormaps[lightshade + fgcolor];
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if (fgcolor != 0)
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destLine[x] = shadedfg;
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}
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else
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{
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destLine[x] = color;
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}
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}
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if (writeStencil)
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stencilLine[x] = stencilWriteValue;
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if (writeDepth)
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zbufferLine[x] = posXW;
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}
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posXW += stepXW;
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posXU += stepXU;
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posXV += stepXV;
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x++;
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}
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}
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}
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#endif
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void(*ScreenTriangle::TriDrawers8[])(int, int, uint32_t, uint32_t, const TriDrawTriangleArgs *) =
|
||||
{
|
||||
&TriScreenDrawer8<TriScreenDrawerModes::OpaqueBlend, TriScreenDrawerModes::TextureSampler>::Execute, // TextureOpaque
|
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|
|
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|||
|
|
@ -32,6 +32,13 @@ struct WorkerThreadData
|
|||
{
|
||||
int32_t core;
|
||||
int32_t num_cores;
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||||
|
||||
// The number of lines to skip to reach the first line to be rendered by this thread
|
||||
int skipped_by_thread(int first_line)
|
||||
{
|
||||
int core_skip = (num_cores - (first_line - core) % num_cores) % num_cores;
|
||||
return core_skip;
|
||||
}
|
||||
};
|
||||
|
||||
struct TriVertex
|
||||
|
|
|
|||
Loading…
Reference in a new issue