From 8a4ed8f41ca54164fdb335343461ab5f9c3bd87f Mon Sep 17 00:00:00 2001 From: StapleButter Date: Thu, 16 Mar 2017 23:01:22 +0100 Subject: reorganize repo, move shit around --- GPU3D_Soft.cpp | 853 --------------------------------------------------------- 1 file changed, 853 deletions(-) delete mode 100644 GPU3D_Soft.cpp (limited to 'GPU3D_Soft.cpp') diff --git a/GPU3D_Soft.cpp b/GPU3D_Soft.cpp deleted file mode 100644 index 5c9dc8e..0000000 --- a/GPU3D_Soft.cpp +++ /dev/null @@ -1,853 +0,0 @@ -/* - Copyright 2016-2017 StapleButter - - This file is part of melonDS. - - melonDS is free software: you can redistribute it and/or modify it under - the terms of the GNU General Public License as published by the Free - Software Foundation, either version 3 of the License, or (at your option) - any later version. - - melonDS is distributed in the hope that it will be useful, but WITHOUT ANY - WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS - FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. - - You should have received a copy of the GNU General Public License along - with melonDS. If not, see http://www.gnu.org/licenses/. -*/ - -#include -#include -#include "NDS.h" -#include "GPU.h" - - -namespace GPU3D -{ -namespace SoftRenderer -{ - -u32 ColorBuffer[256*192]; -u32 DepthBuffer[256*192]; -u32 AttrBuffer[256*192]; - -// attribute buffer: -// bit0-5: polygon ID -// bit8: fog enable - - -bool Init() -{ - return true; -} - -void DeInit() -{ -} - -void Reset() -{ - memset(ColorBuffer, 0, 256*192 * 4); - memset(DepthBuffer, 0, 256*192 * 4); - memset(AttrBuffer, 0, 256*192 * 4); -} - - -void TextureLookup(u32 texparam, u32 texpal, s16 s, s16 t, u16* color, u8* alpha) -{ - u32 vramaddr = (texparam & 0xFFFF) << 3; - - u32 width = 8 << ((texparam >> 20) & 0x7); - u32 height = 8 << ((texparam >> 23) & 0x7); - - s >>= 4; - t >>= 4; - - // texture wrapping - // TODO: optimize this somehow - - if (texparam & (1<<16)) - { - if (texparam & (1<<18)) - { - if (s & width) s = (width-1) - (s & (width-1)); - else s = (s & (width-1)); - } - else - s &= width-1; - } - else - { - if (s < 0) s = 0; - else if (s >= width) s = width-1; - } - - if (texparam & (1<<17)) - { - if (texparam & (1<<19)) - { - if (t & height) t = (height-1) - (t & (height-1)); - else t = (t & (height-1)); - } - else - t &= height-1; - } - else - { - if (t < 0) t = 0; - else if (t >= height) t = height-1; - } - - u8 alpha0; - if (texparam & (1<<29)) alpha0 = 0; - else alpha0 = 31; - - switch ((texparam >> 26) & 0x7) - { - case 1: // A3I5 - { - vramaddr += ((t * width) + s); - u8 pixel = GPU::ReadVRAM_Texture(vramaddr); - - texpal <<= 4; - *color = GPU::ReadVRAM_TexPal(texpal + ((pixel&0x1F)<<1)); - *alpha = ((pixel >> 3) & 0x1C) + (pixel >> 6); - } - break; - - case 2: // 4-color - { - vramaddr += (((t * width) + s) >> 2); - u8 pixel = GPU::ReadVRAM_Texture(vramaddr); - pixel >>= ((s & 0x3) << 1); - pixel &= 0x3; - - texpal <<= 3; - *color = GPU::ReadVRAM_TexPal(texpal + (pixel<<1)); - *alpha = (pixel==0) ? alpha0 : 31; - } - break; - - case 3: // 16-color - { - vramaddr += (((t * width) + s) >> 1); - u8 pixel = GPU::ReadVRAM_Texture(vramaddr); - if (s & 0x1) pixel >>= 4; - else pixel &= 0xF; - - texpal <<= 4; - *color = GPU::ReadVRAM_TexPal(texpal + (pixel<<1)); - *alpha = (pixel==0) ? alpha0 : 31; - } - break; - - case 4: // 256-color - { - vramaddr += ((t * width) + s); - u8 pixel = GPU::ReadVRAM_Texture(vramaddr); - - texpal <<= 4; - *color = GPU::ReadVRAM_TexPal(texpal + (pixel<<1)); - *alpha = (pixel==0) ? alpha0 : 31; - } - break; - - case 5: // compressed - { - vramaddr += ((t & 0x3FC) * (width>>2)) + (s & 0x3FC); - vramaddr += (t & 0x3); - - u32 slot1addr = 0x20000 + ((vramaddr & 0x1FFFC) >> 1); - if (vramaddr >= 0x40000) - slot1addr += 0x10000; - - u8 val = GPU::ReadVRAM_Texture(vramaddr); - val >>= (2 * (s & 0x3)); - - u16 palinfo = GPU::ReadVRAM_Texture(slot1addr); - u32 paloffset = (palinfo & 0x3FFF) << 2; - texpal <<= 4; - - switch (val & 0x3) - { - case 0: - *color = GPU::ReadVRAM_TexPal(texpal + paloffset); - *alpha = 31; - break; - - case 1: - *color = GPU::ReadVRAM_TexPal(texpal + paloffset + 2); - *alpha = 31; - break; - - case 2: - if ((palinfo >> 14) == 1) - { - u16 color0 = GPU::ReadVRAM_TexPal(texpal + paloffset); - u16 color1 = GPU::ReadVRAM_TexPal(texpal + paloffset + 2); - - u32 r0 = color0 & 0x001F; - u32 g0 = color0 & 0x03E0; - u32 b0 = color0 & 0x7C00; - u32 r1 = color1 & 0x001F; - u32 g1 = color1 & 0x03E0; - u32 b1 = color1 & 0x7C00; - - u32 r = (r0 + r1) >> 1; - u32 g = ((g0 + g1) >> 1) & 0x03E0; - u32 b = ((b0 + b1) >> 1) & 0x7C00; - - *color = r | g | b; - } - else if ((palinfo >> 14) == 3) - { - u16 color0 = GPU::ReadVRAM_TexPal(texpal + paloffset); - u16 color1 = GPU::ReadVRAM_TexPal(texpal + paloffset + 2); - - u32 r0 = color0 & 0x001F; - u32 g0 = color0 & 0x03E0; - u32 b0 = color0 & 0x7C00; - u32 r1 = color1 & 0x001F; - u32 g1 = color1 & 0x03E0; - u32 b1 = color1 & 0x7C00; - - u32 r = (r0*5 + r1*3) >> 3; - u32 g = ((g0*5 + g1*3) >> 3) & 0x03E0; - u32 b = ((b0*5 + b1*3) >> 3) & 0x7C00; - - *color = r | g | b; - } - else - *color = GPU::ReadVRAM_TexPal(texpal + paloffset + 4); - *alpha = 31; - break; - - case 3: - if ((palinfo >> 14) == 2) - { - *color = GPU::ReadVRAM_TexPal(texpal + paloffset + 6); - *alpha = 31; - } - else if ((palinfo >> 14) == 3) - { - u16 color0 = GPU::ReadVRAM_TexPal(texpal + paloffset); - u16 color1 = GPU::ReadVRAM_TexPal(texpal + paloffset + 2); - - u32 r0 = color0 & 0x001F; - u32 g0 = color0 & 0x03E0; - u32 b0 = color0 & 0x7C00; - u32 r1 = color1 & 0x001F; - u32 g1 = color1 & 0x03E0; - u32 b1 = color1 & 0x7C00; - - u32 r = (r0*3 + r1*5) >> 3; - u32 g = ((g0*3 + g1*5) >> 3) & 0x03E0; - u32 b = ((b0*3 + b1*5) >> 3) & 0x7C00; - - *color = r | g | b; - *alpha = 31; - } - else - { - *color = 0; - *alpha = 0; - } - break; - } - } - break; - - case 6: // A5I3 - { - vramaddr += ((t * width) + s); - u8 pixel = GPU::ReadVRAM_Texture(vramaddr); - - texpal <<= 4; - *color = GPU::ReadVRAM_TexPal(texpal + ((pixel&0x7)<<1)); - *alpha = (pixel >> 3); - } - break; - - case 7: // direct color - { - vramaddr += (((t * width) + s) << 1); - *color = GPU::ReadVRAM_Texture(vramaddr); - *alpha = (*color & 0x8000) ? 31 : 0; - } - break; - } -} - -bool DepthTest(Polygon* polygon, s32 x, s32 y, s32 z) -{ - u32 oldz = DepthBuffer[(256*y) + x]; - - if (polygon->Attr & (1<<14)) - { - s32 diff = oldz - z; - if ((u32)(diff + 0x200) <= 0x400) - return true; - } - else - if (z < oldz) - return true; - - return false; -} - -u32 RenderPixel(Polygon* polygon, s32 x, s32 y, s32 z, u8 vr, u8 vg, u8 vb, s16 s, s16 t) -{ - u32 attr = polygon->Attr; - u8 r, g, b, a; - - u32 polyalpha = (polygon->Attr >> 16) & 0x1F; - bool wireframe = (polyalpha == 0); - - if ((DispCnt & (1<<0)) && (((polygon->TexParam >> 26) & 0x7) != 0)) - { - u8 tr, tg, tb; - - u16 tcolor; u8 talpha; - TextureLookup(polygon->TexParam, polygon->TexPalette, s, t, &tcolor, &talpha); - - tr = (tcolor << 1) & 0x3E; if (tr) tr++; - tg = (tcolor >> 4) & 0x3E; if (tg) tg++; - tb = (tcolor >> 9) & 0x3E; if (tb) tb++; - - // TODO: other blending modes - r = ((tr+1) * (vr+1) - 1) >> 6; - g = ((tg+1) * (vg+1) - 1) >> 6; - b = ((tb+1) * (vb+1) - 1) >> 6; - a = ((talpha+1) * (polyalpha+1) - 1) >> 5; - } - else - { - r = vr; - g = vg; - b = vb; - a = polyalpha; - } - - if (wireframe) a = 31; - - return r | (g << 8) | (b << 16) | (a << 24); -} - -void RenderPolygon(Polygon* polygon) -{ - int nverts = polygon->NumVertices; - bool isline = false; - - int vtop = polygon->VTop, vbot = polygon->VBottom; - s32 ytop = polygon->YTop, ybot = polygon->YBottom; - s32 xtop = polygon->XTop, xbot = polygon->XBottom; - - if (ytop > 191) return; - - // draw, line per line - - u32 polyalpha = (polygon->Attr >> 16) & 0x1F; - bool wireframe = (polyalpha == 0); - - int lcur = vtop, rcur = vtop; - int lnext, rnext; - - s32 dxl, dxr; - s32 lslope, rslope; - bool l_xmajor, r_xmajor; - - if (ybot == ytop) - { - ybot++; - isline = true; - - vtop = 0; vbot = 0; - xtop = 256; xbot = 0; - int i; - - i = 1; - if (polygon->Vertices[i]->FinalPosition[0] < polygon->Vertices[vtop]->FinalPosition[0]) vtop = i; - if (polygon->Vertices[i]->FinalPosition[0] > polygon->Vertices[vbot]->FinalPosition[0]) vbot = i; - - i = nverts - 1; - if (polygon->Vertices[i]->FinalPosition[0] < polygon->Vertices[vtop]->FinalPosition[0]) vtop = i; - if (polygon->Vertices[i]->FinalPosition[0] > polygon->Vertices[vbot]->FinalPosition[0]) vbot = i; - - lcur = vtop; lnext = vtop; - rcur = vbot; rnext = vbot; - - lslope = 0; l_xmajor = false; - rslope = 0; r_xmajor = false; - } - else - { - //while (polygon->Vertices[lnext]->FinalPosition[1] ) - if (polygon->FacingView) - { - lnext = lcur + 1; - if (lnext >= nverts) lnext = 0; - rnext = rcur - 1; - if (rnext < 0) rnext = nverts - 1; - } - else - { - lnext = lcur - 1; - if (lnext < 0) lnext = nverts - 1; - rnext = rcur + 1; - if (rnext >= nverts) rnext = 0; - } - - if (polygon->Vertices[lnext]->FinalPosition[1] == polygon->Vertices[lcur]->FinalPosition[1]) - lslope = 0; - else - lslope = ((polygon->Vertices[lnext]->FinalPosition[0] - polygon->Vertices[lcur]->FinalPosition[0]) << 12) / - (polygon->Vertices[lnext]->FinalPosition[1] - polygon->Vertices[lcur]->FinalPosition[1]); - - if (polygon->Vertices[rnext]->FinalPosition[1] == polygon->Vertices[rcur]->FinalPosition[1]) - rslope = 0; - else - rslope = ((polygon->Vertices[rnext]->FinalPosition[0] - polygon->Vertices[rcur]->FinalPosition[0]) << 12) / - (polygon->Vertices[rnext]->FinalPosition[1] - polygon->Vertices[rcur]->FinalPosition[1]); - - l_xmajor = (lslope < -0x1000) || (lslope > 0x1000); - r_xmajor = (rslope < -0x1000) || (rslope > 0x1000); - } - - if (l_xmajor) dxl = (lslope > 0) ? 0x800 : (-lslope-0x800)+0x1000; - else if (lslope) dxl = (lslope > 0) ? 0 : 0x1000; - else dxl = 0; - - if (r_xmajor) dxr = (rslope > 0) ? rslope-0x800 : 0x800+0x1000; - else if (rslope) dxr = (rslope > 0) ? 0 : 0x1000; - else dxr = 0x1000; - - if (ybot > 192) ybot = 192; - for (s32 y = ytop; y < ybot; y++) - { - if (!isline) - { - if (y >= polygon->Vertices[lnext]->FinalPosition[1] && lcur != vbot) - { - while (y >= polygon->Vertices[lnext]->FinalPosition[1] && lcur != vbot) - { - lcur = lnext; - - if (polygon->FacingView) - { - lnext = lcur + 1; - if (lnext >= nverts) lnext = 0; - } - else - { - lnext = lcur - 1; - if (lnext < 0) lnext = nverts - 1; - } - } - - if (polygon->Vertices[lnext]->FinalPosition[1] == polygon->Vertices[lcur]->FinalPosition[1]) - lslope = 0; - else - lslope = ((polygon->Vertices[lnext]->FinalPosition[0] - polygon->Vertices[lcur]->FinalPosition[0]) << 12) / - (polygon->Vertices[lnext]->FinalPosition[1] - polygon->Vertices[lcur]->FinalPosition[1]); - - l_xmajor = (lslope < -0x1000) || (lslope > 0x1000); - - if (l_xmajor) dxl = (lslope > 0) ? 0x800 : (-lslope-0x800)+0x1000; - else if (lslope) dxl = (lslope > 0) ? 0 : 0x1000; - else dxl = 0; - } - - if (y >= polygon->Vertices[rnext]->FinalPosition[1] && rcur != vbot) - { - while (y >= polygon->Vertices[rnext]->FinalPosition[1] && rcur != vbot) - { - rcur = rnext; - - if (polygon->FacingView) - { - rnext = rcur - 1; - if (rnext < 0) rnext = nverts - 1; - } - else - { - rnext = rcur + 1; - if (rnext >= nverts) rnext = 0; - } - } - - if (polygon->Vertices[rnext]->FinalPosition[1] == polygon->Vertices[rcur]->FinalPosition[1]) - rslope = 0; - else - rslope = ((polygon->Vertices[rnext]->FinalPosition[0] - polygon->Vertices[rcur]->FinalPosition[0]) << 12) / - (polygon->Vertices[rnext]->FinalPosition[1] - polygon->Vertices[rcur]->FinalPosition[1]); - - r_xmajor = (rslope < -0x1000) || (rslope > 0x1000); - - if (r_xmajor) dxr = (rslope > 0) ? rslope-0x800 : 0x800+0x1000; - else if (rslope) dxr = (rslope > 0) ? 0 : 0x1000; - else dxr = 0x1000; - } - } - - Vertex *vlcur, *vlnext, *vrcur, *vrnext; - s32 xstart, xend; - s32 xstart_int, xend_int; - s32 slope_start, slope_end; - - if (lslope == 0 && rslope == 0 && - polygon->Vertices[lcur]->FinalPosition[0] == polygon->Vertices[rcur]->FinalPosition[0]) - { - xstart = polygon->Vertices[lcur]->FinalPosition[0]; - xend = xstart; - } - else - { - if (lslope > 0) - { - xstart = polygon->Vertices[lcur]->FinalPosition[0] + (dxl >> 12); - if (xstart < polygon->Vertices[lcur]->FinalPosition[0]) - xstart = polygon->Vertices[lcur]->FinalPosition[0]; - else if (xstart > polygon->Vertices[lnext]->FinalPosition[0]-1) - xstart = polygon->Vertices[lnext]->FinalPosition[0]-1; - } - else if (lslope < 0) - { - xstart = polygon->Vertices[lcur]->FinalPosition[0] - (dxl >> 12); - if (xstart < polygon->Vertices[lnext]->FinalPosition[0]) - xstart = polygon->Vertices[lnext]->FinalPosition[0]; - else if (xstart > polygon->Vertices[lcur]->FinalPosition[0]-1) - xstart = polygon->Vertices[lcur]->FinalPosition[0]-1; - } - else - xstart = polygon->Vertices[lcur]->FinalPosition[0]; - - if (rslope > 0) - { - xend = polygon->Vertices[rcur]->FinalPosition[0] + (dxr >> 12); - if (xend < polygon->Vertices[rcur]->FinalPosition[0]) - xend = polygon->Vertices[rcur]->FinalPosition[0]; - else if (xend > polygon->Vertices[rnext]->FinalPosition[0]-1) - xend = polygon->Vertices[rnext]->FinalPosition[0]-1; - } - else if (rslope < 0) - { - xend = polygon->Vertices[rcur]->FinalPosition[0] - (dxr >> 12); - if (xend < polygon->Vertices[rnext]->FinalPosition[0]) - xend = polygon->Vertices[rnext]->FinalPosition[0]; - else if (xend > polygon->Vertices[rcur]->FinalPosition[0]-1) - xend = polygon->Vertices[rcur]->FinalPosition[0]-1; - } - else - xend = polygon->Vertices[rcur]->FinalPosition[0] - 1; - } - - // if the left and right edges are swapped, render backwards. - // note: we 'forget' to swap the xmajor flags, on purpose - // the hardware has the same bug - if (xstart > xend) - { - vlcur = polygon->Vertices[rcur]; - vlnext = polygon->Vertices[rnext]; - vrcur = polygon->Vertices[lcur]; - vrnext = polygon->Vertices[lnext]; - - slope_start = rslope; - slope_end = lslope; - - s32 tmp = xstart; xstart = xend; xend = tmp; - } - else - { - vlcur = polygon->Vertices[lcur]; - vlnext = polygon->Vertices[lnext]; - vrcur = polygon->Vertices[rcur]; - vrnext = polygon->Vertices[rnext]; - - slope_start = lslope; - slope_end = rslope; - } - - // interpolate attributes along Y - s64 lfactor1, lfactor2; - s64 rfactor1, rfactor2; - - if (l_xmajor) - { - lfactor1 = (vlnext->FinalPosition[0] - xstart) * vlnext->FinalPosition[3]; - lfactor2 = (xstart - vlcur->FinalPosition[0]) * vlcur->FinalPosition[3]; - } - else - { - lfactor1 = (vlnext->FinalPosition[1] - y) * vlnext->FinalPosition[3]; - lfactor2 = (y - vlcur->FinalPosition[1]) * vlcur->FinalPosition[3]; - } - - s64 ldenom = lfactor1 + lfactor2; - if (ldenom == 0) - { - lfactor1 = 0x1000; - lfactor2 = 0; - ldenom = 0x1000; - } - - if (r_xmajor) - { - rfactor1 = (vrnext->FinalPosition[0] - xend+1) * vrnext->FinalPosition[3]; - rfactor2 = (xend+1 - vrcur->FinalPosition[0]) * vrcur->FinalPosition[3]; - } - else - { - rfactor1 = (vrnext->FinalPosition[1] - y) * vrnext->FinalPosition[3]; - rfactor2 = (y - vrcur->FinalPosition[1]) * vrcur->FinalPosition[3]; - } - - s64 rdenom = rfactor1 + rfactor2; - if (rdenom == 0) - { - rfactor1 = 0x1000; - rfactor2 = 0; - rdenom = 0x1000; - } - - s32 zl = ((lfactor1 * vlcur->FinalPosition[2]) + (lfactor2 * vlnext->FinalPosition[2])) / ldenom; - s32 zr = ((rfactor1 * vrcur->FinalPosition[2]) + (rfactor2 * vrnext->FinalPosition[2])) / rdenom; - - s32 wl = ((lfactor1 * vlcur->FinalPosition[3]) + (lfactor2 * vlnext->FinalPosition[3])) / ldenom; - s32 wr = ((rfactor1 * vrcur->FinalPosition[3]) + (rfactor2 * vrnext->FinalPosition[3])) / rdenom; - - s32 rl = ((lfactor1 * vlcur->FinalColor[0]) + (lfactor2 * vlnext->FinalColor[0])) / ldenom; - s32 gl = ((lfactor1 * vlcur->FinalColor[1]) + (lfactor2 * vlnext->FinalColor[1])) / ldenom; - s32 bl = ((lfactor1 * vlcur->FinalColor[2]) + (lfactor2 * vlnext->FinalColor[2])) / ldenom; - - s32 sl = ((lfactor1 * vlcur->TexCoords[0]) + (lfactor2 * vlnext->TexCoords[0])) / ldenom; - s32 tl = ((lfactor1 * vlcur->TexCoords[1]) + (lfactor2 * vlnext->TexCoords[1])) / ldenom; - - s32 rr = ((rfactor1 * vrcur->FinalColor[0]) + (rfactor2 * vrnext->FinalColor[0])) / rdenom; - s32 gr = ((rfactor1 * vrcur->FinalColor[1]) + (rfactor2 * vrnext->FinalColor[1])) / rdenom; - s32 br = ((rfactor1 * vrcur->FinalColor[2]) + (rfactor2 * vrnext->FinalColor[2])) / rdenom; - - s32 sr = ((rfactor1 * vrcur->TexCoords[0]) + (rfactor2 * vrnext->TexCoords[0])) / rdenom; - s32 tr = ((rfactor1 * vrcur->TexCoords[1]) + (rfactor2 * vrnext->TexCoords[1])) / rdenom; - - // calculate edges - s32 l_edgeend, r_edgestart; - - if (l_xmajor) - { - if (slope_start > 0) l_edgeend = vlcur->FinalPosition[0] + ((dxl + slope_start) >> 12); - else l_edgeend = vlcur->FinalPosition[0] - ((dxl - slope_start) >> 12); - - if (l_edgeend == xstart) l_edgeend++; - } - else - l_edgeend = xstart + 1; - - if (r_xmajor) - { - if (slope_end > 0) r_edgestart = vrcur->FinalPosition[0] + ((dxr + slope_end) >> 12); - else r_edgestart = vrcur->FinalPosition[0] - ((dxr - slope_end) >> 12); - - if (r_edgestart == xend_int) r_edgestart--; - } - else - r_edgestart = xend - 1; - - // edge fill rules for opaque pixels: - // * right edge is filled if slope > 1 - // * left edge is filled if slope <= 1 - // * edges with slope = 0 are always filled - // edges are always filled if the pixels are translucent - // in wireframe mode, there are special rules for equal Z (TODO) - - for (s32 x = xstart; x <= xend; x++) - { - if (x < 0) continue; - if (x > 255) break; - - int edge = 0; - if (y == ytop) edge |= 0x4; - else if (y == ybot-1) edge |= 0x8; - if (x < l_edgeend) edge |= 0x1; - else if (x > r_edgestart) edge |= 0x2; - - // wireframe polygons. really ugly, but works - if (wireframe && edge==0) continue; - - s64 factor1 = (xend+1 - x) * wr; - s64 factor2 = (x - xstart) * wl; - s64 denom = factor1 + factor2; - if (denom == 0) - { - factor1 = 0x1000; - factor2 = 0; - denom = 0x1000; - } - - s32 z = ((factor1 * zl) + (factor2 * zr)) / denom; - if (!DepthTest(polygon, x, y, z)) continue; - - u32 vr = ((factor1 * rl) + (factor2 * rr)) / denom; - u32 vg = ((factor1 * gl) + (factor2 * gr)) / denom; - u32 vb = ((factor1 * bl) + (factor2 * br)) / denom; - - s16 s = ((factor1 * sl) + (factor2 * sr)) / denom; - s16 t = ((factor1 * tl) + (factor2 * tr)) / denom; - - u32 color = RenderPixel(polygon, x, y, z, vr>>3, vg>>3, vb>>3, s, t); - u32 attr = 0; - u32 pixeladdr = (y*256) + x; - - u8 alpha = color >> 24; - - // alpha test - if (DispCnt & (1<<2)) - { - if (alpha <= AlphaRef) continue; - } - else - { - if (alpha == 0) continue; - } - - // alpha blending disable - // TODO: check alpha test when blending is disabled - if (!(DispCnt & (1<<3))) - alpha = 31; - - u32 dstcolor = ColorBuffer[pixeladdr]; - u32 dstalpha = dstcolor >> 24; - - if (alpha == 31) - { - // edge fill rules for opaque pixels - // TODO, eventually: antialiasing - if (!wireframe) - { - if ((edge & 0x1) && slope_start > 0x1000) - continue; - if ((edge & 0x2) && (slope_end != 0 && slope_end <= 0x1000)) - continue; - } - - DepthBuffer[pixeladdr] = z; - } - else if (dstalpha == 0) - { - // TODO: conditional Z-buffer update - DepthBuffer[pixeladdr] = z; - } - else - { - u32 srcR = color & 0x3F; - u32 srcG = (color >> 8) & 0x3F; - u32 srcB = (color >> 16) & 0x3F; - - u32 dstR = dstcolor & 0x3F; - u32 dstG = (dstcolor >> 8) & 0x3F; - u32 dstB = (dstcolor >> 16) & 0x3F; - - alpha++; - dstR = ((srcR * alpha) + (dstR * (32-alpha))) >> 5; - dstG = ((srcG * alpha) + (dstG * (32-alpha))) >> 5; - dstB = ((srcB * alpha) + (dstB * (32-alpha))) >> 5; - - alpha--; - if (alpha > dstalpha) dstalpha = alpha; - - color = dstR | (dstG << 8) | (dstB << 16) | (dstalpha << 24); - - // TODO: conditional Z-buffer update - DepthBuffer[pixeladdr] = z; - } - - ColorBuffer[pixeladdr] = color; - AttrBuffer[pixeladdr] = attr; - } - - if (lslope > 0) dxl += lslope; - else dxl -= lslope; - if (rslope > 0) dxr += rslope; - else dxr -= rslope; - } -} - -void RenderFrame(Vertex* vertices, Polygon* polygons, int npolys) -{ - u32 polyid = (ClearAttr1 >> 24) & 0x3F; - - if (DispCnt & (1<<14)) - { - u8 xoff = (ClearAttr2 >> 16) & 0xFF; - u8 yoff = (ClearAttr2 >> 24) & 0xFF; - - for (int y = 0; y < 256*192; y += 256) - { - for (int x = 0; x < 256; x++) - { - u16 val2 = GPU::ReadVRAM_Texture(0x40000 + (yoff << 9) + (xoff << 1)); - u16 val3 = GPU::ReadVRAM_Texture(0x60000 + (yoff << 9) + (xoff << 1)); - - // TODO: confirm color conversion - u32 r = (val2 << 1) & 0x3E; if (r) r++; - u32 g = (val2 >> 4) & 0x3E; if (g) g++; - u32 b = (val2 >> 9) & 0x3E; if (b) b++; - u32 a = (val2 & 0x8000) ? 0x1F000000 : 0; - u32 color = r | (g << 8) | (b << 16) | a; - - u32 z = ((val3 & 0x7FFF) * 0x200) + 0x1FF; - if (z >= 0x10000 && z < 0xFFFFFF) z++; - - ColorBuffer[y+x] = color; - DepthBuffer[y+x] = z; - AttrBuffer[y+x] = polyid | ((val3 & 0x8000) >> 7); - - xoff++; - } - - yoff++; - } - } - else - { - // TODO: confirm color conversion - u32 r = (ClearAttr1 << 1) & 0x3E; if (r) r++; - u32 g = (ClearAttr1 >> 4) & 0x3E; if (g) g++; - u32 b = (ClearAttr1 >> 9) & 0x3E; if (b) b++; - u32 a = (ClearAttr1 >> 16) & 0x1F; - u32 color = r | (g << 8) | (b << 16) | (a << 24); - - u32 z = ((ClearAttr2 & 0x7FFF) * 0x200) + 0x1FF; - if (z >= 0x10000 && z < 0xFFFFFF) z++; - - polyid |= ((ClearAttr1 & 0x8000) >> 7); - - for (int i = 0; i < 256*192; i++) - { - ColorBuffer[i] = color; - DepthBuffer[i] = z; - AttrBuffer[i] = polyid; - } - } - - // TODO: Y-sorting of translucent polygons - - for (int i = 0; i < npolys; i++) - { - if (polygons[i].Translucent) continue; - RenderPolygon(&polygons[i]); - } - - for (int i = 0; i < npolys; i++) - { - if (!polygons[i].Translucent) continue; - RenderPolygon(&polygons[i]); - } -} - -u32* GetLine(int line) -{ - return &ColorBuffer[line * 256]; -} - -} -} -- cgit v1.2.3