328 lines
9.9 KiB
C++
328 lines
9.9 KiB
C++
// Copyright (C) 2003-2009 Dolphin Project.
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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, version 2.0.
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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 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#include "Common.h"
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#include "Rasterizer.h"
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#include "HwRasterizer.h"
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#include "EfbInterface.h"
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#include "BPMemLoader.h"
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#include "XFMemLoader.h"
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#include "Tev.h"
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#include "Statistics.h"
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#include "VideoConfig.h"
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#define BLOCK_SIZE 8
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namespace Rasterizer
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{
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s32 scissorLeft = 0;
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s32 scissorTop = 0;
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s32 scissorRight = 0;
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s32 scissorBottom = 0;
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Tev tev;
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void Init()
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{
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tev.Init();
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}
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inline int iround(float x)
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{
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int t;
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#if defined(_WIN32) && !defined(_M_X64)
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__asm
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{
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fld x
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fistp t
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}
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#else
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t = (int)x;
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if((x - t) >= 0.5)
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return t + 1;
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#endif
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return t;
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}
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void SetScissor()
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{
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int xoff = bpmem.scissorOffset.x * 2 - 342;
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int yoff = bpmem.scissorOffset.y * 2 - 342;
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scissorLeft = bpmem.scissorTL.x - xoff - 342;
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if (scissorLeft < 0) scissorLeft = 0;
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scissorTop = bpmem.scissorTL.y - yoff - 342;
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if (scissorTop < 0) scissorTop = 0;
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scissorRight = bpmem.scissorBR.x - xoff - 341;
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if (scissorRight > EFB_WIDTH) scissorRight = EFB_WIDTH;
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scissorBottom = bpmem.scissorBR.y - yoff - 341;
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if (scissorBottom > EFB_HEIGHT) scissorBottom = EFB_HEIGHT;
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}
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void SetTevReg(int reg, int comp, bool konst, s16 color)
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{
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tev.SetRegColor(reg, comp, konst, color);
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}
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inline void Draw(s32 x, s32 y)
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{
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INCSTAT(stats.thisFrame.rasterizedPixels);
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float zFloat = 1.0f + ZSlope.GetValue(x, y);
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if(zFloat < 0|| zFloat > 1)
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return;
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u32 z = (u32)(zFloat * 0x00ffffff);
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if (bpmem.zcontrol.zcomploc && bpmem.zmode.testenable)
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{
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// early z
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if (!EfbInterface::ZCompare(x, y, z))
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return;
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}
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float invW = 1.0f / WSlope.GetValue(x, y);
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tev.Position[0] = x;
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tev.Position[1] = y;
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tev.Position[2] = z;
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for(unsigned int i = 0; i < bpmem.genMode.numcolchans; i++)
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{
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for(int comp = 0; comp < 4; comp++)
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tev.Color[i][comp] = (u8)ColorSlopes[i][comp].GetValue(x, y);
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}
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for(unsigned int i = 0; i < bpmem.genMode.numtexgens; i++)
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{
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if (xfregs.texMtxInfo[i].projection)
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{
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float q = TexSlopes[i][2].GetValue(x, y) * invW;
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float invQ = invW / q;
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tev.Uv[i][0] = TexSlopes[i][0].GetValue(x, y) * invQ * (bpmem.texcoords[i].s.scale_minus_1 + 1);
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tev.Uv[i][1] = TexSlopes[i][1].GetValue(x, y) * invQ * (bpmem.texcoords[i].t.scale_minus_1 + 1);
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tev.Lod[i] = 0;
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}
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else
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{
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tev.Uv[i][0] = TexSlopes[i][0].GetValue(x, y) * invW * (bpmem.texcoords[i].s.scale_minus_1 + 1);
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tev.Uv[i][1] = TexSlopes[i][1].GetValue(x, y) * invW * (bpmem.texcoords[i].t.scale_minus_1 + 1);
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tev.Lod[i] = 0;
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}
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}
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tev.Draw();
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}
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void InitSlope(Slope *slope, float f1, float f2, float f3, float DX31, float DX12, float DY12, float DY31, float X1, float Y1)
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{
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float DF31 = f3 - f1;
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float DF21 = f2 - f1;
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float a = DF31 * -DY12 - DF21 * DY31;
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float b = DX31 * DF21 + DX12 * DF31;
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float c = -DX12 * DY31 - DX31 * -DY12;
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slope->dfdx = -a / c;
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slope->dfdy = -b / c;
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slope->f0 = f1;
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slope->x0 = X1;
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slope->y0 = Y1;
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}
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void DrawTriangleFrontFace(OutputVertexData *v0, OutputVertexData *v1, OutputVertexData *v2)
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{
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INCSTAT(stats.thisFrame.numTrianglesDrawn);
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if (g_Config.bHwRasterizer)
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{
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HwRasterizer::DrawTriangleFrontFace(v0, v1, v2);
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return;
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}
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// adapted from http://www.devmaster.net/forums/showthread.php?t=1884
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// 28.4 fixed-pou32 coordinates. rounded to nearest
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const s32 Y1 = iround(16.0f * v0->screenPosition[1]);
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const s32 Y2 = iround(16.0f * v1->screenPosition[1]);
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const s32 Y3 = iround(16.0f * v2->screenPosition[1]);
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const s32 X1 = iround(16.0f * v0->screenPosition[0]);
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const s32 X2 = iround(16.0f * v1->screenPosition[0]);
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const s32 X3 = iround(16.0f * v2->screenPosition[0]);
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// Deltas
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const s32 DX12 = X1 - X2;
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const s32 DX23 = X2 - X3;
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const s32 DX31 = X3 - X1;
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const s32 DY12 = Y1 - Y2;
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const s32 DY23 = Y2 - Y3;
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const s32 DY31 = Y3 - Y1;
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// Fixed-pos32 deltas
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const s32 FDX12 = DX12 << 4;
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const s32 FDX23 = DX23 << 4;
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const s32 FDX31 = DX31 << 4;
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const s32 FDY12 = DY12 << 4;
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const s32 FDY23 = DY23 << 4;
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const s32 FDY31 = DY31 << 4;
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// Bounding rectangle
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s32 minx = (min(min(X1, X2), X3) + 0xF) >> 4;
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s32 maxx = (max(max(X1, X2), X3) + 0xF) >> 4;
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s32 miny = (min(min(Y1, Y2), Y3) + 0xF) >> 4;
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s32 maxy = (max(max(Y1, Y2), Y3) + 0xF) >> 4;
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// scissor
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minx = max(minx, scissorLeft);
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maxx = min(maxx, scissorRight);
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miny = max(miny, scissorTop);
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maxy = min(maxy, scissorBottom);
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if (minx >= maxx || miny >= maxy)
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return;
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// Setup slopes
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float fltx1 = v0->screenPosition[0];
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float flty1 = v0->screenPosition[1];
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float fltdx31 = v2->screenPosition[0] - fltx1;
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float fltdx12 = fltx1 - v1->screenPosition[0];
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float fltdy12 = flty1 - v1->screenPosition[1];
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float fltdy31 = v2->screenPosition[1] - flty1;
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float w[3] = { 1.0f / v0->projectedPosition[3], 1.0f / v1->projectedPosition[3], 1.0f / v2->projectedPosition[3] };
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InitSlope(&WSlope, w[0], w[1], w[2], fltdx31, fltdx12, fltdy12, fltdy31, fltx1, flty1);
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InitSlope(&ZSlope, v0->screenPosition[2], v1->screenPosition[2], v2->screenPosition[2], fltdx31, fltdx12, fltdy12, fltdy31, fltx1, flty1);
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for(unsigned int i = 0; i < bpmem.genMode.numcolchans; i++)
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{
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for(int comp = 0; comp < 4; comp++)
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InitSlope(&ColorSlopes[i][comp], v0->color[i][comp], v1->color[i][comp], v2->color[i][comp], fltdx31, fltdx12, fltdy12, fltdy31, fltx1, flty1);
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}
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for(unsigned int i = 0; i < bpmem.genMode.numtexgens; i++)
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{
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for(int comp = 0; comp < 3; comp++)
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InitSlope(&TexSlopes[i][comp], v0->texCoords[i][comp] * w[0], v1->texCoords[i][comp] * w[1], v2->texCoords[i][comp] * w[2], fltdx31, fltdx12, fltdy12, fltdy31, fltx1, flty1);
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}
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// Start in corner of 8x8 block
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minx &= ~(BLOCK_SIZE - 1);
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miny &= ~(BLOCK_SIZE - 1);
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// Half-edge constants
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s32 C1 = DY12 * X1 - DX12 * Y1;
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s32 C2 = DY23 * X2 - DX23 * Y2;
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s32 C3 = DY31 * X3 - DX31 * Y3;
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// Correct for fill convention
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if(DY12 < 0 || (DY12 == 0 && DX12 > 0)) C1++;
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if(DY23 < 0 || (DY23 == 0 && DX23 > 0)) C2++;
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if(DY31 < 0 || (DY31 == 0 && DX31 > 0)) C3++;
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// Loop through blocks
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for(s32 y = miny; y < maxy; y += BLOCK_SIZE)
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{
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for(s32 x = minx; x < maxx; x += BLOCK_SIZE)
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{
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// Corners of block
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s32 x0 = x << 4;
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s32 x1 = (x + BLOCK_SIZE - 1) << 4;
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s32 y0 = y << 4;
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s32 y1 = (y + BLOCK_SIZE - 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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// Skip block when outside an edge
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if(a == 0x0 || b == 0x0 || c == 0x0) continue;
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// Accept whole block when totally covered
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if(a == 0xF && b == 0xF && c == 0xF)
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{
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for(s32 iy = 0; iy < BLOCK_SIZE; iy++)
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{
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for(s32 ix = x; ix < x + BLOCK_SIZE; ix++)
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{
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Draw(ix, iy + y);
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}
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}
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}
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else // Partially covered block
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{
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s32 CY1 = C1 + DX12 * y0 - DY12 * x0;
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s32 CY2 = C2 + DX23 * y0 - DY23 * x0;
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s32 CY3 = C3 + DX31 * y0 - DY31 * x0;
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for(s32 iy = y; iy < y + BLOCK_SIZE; iy++)
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{
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s32 CX1 = CY1;
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s32 CX2 = CY2;
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s32 CX3 = CY3;
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for(s32 ix = x; ix < x + BLOCK_SIZE; ix++)
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{
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if(CX1 > 0 && CX2 > 0 && CX3 > 0)
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{
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Draw(ix, iy);
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}
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CX1 -= FDY12;
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CX2 -= FDY23;
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CX3 -= FDY31;
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}
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CY1 += FDX12;
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CY2 += FDX23;
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CY3 += FDX31;
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}
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}
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}
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}
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}
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}
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