mirror of https://github.com/PCSX2/pcsx2.git
292 lines
7.1 KiB
C++
292 lines
7.1 KiB
C++
// SPDX-FileCopyrightText: 2002-2025 PCSX2 Dev Team
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// SPDX-License-Identifier: GPL-3.0+
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#include "GS/GSDrawingContext.h"
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#include "GS/GSGL.h"
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#include "GS/GS.h"
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#include "GS/GSUtil.h"
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static int findmax(int tl, int br, int limit, int wm, int minuv, int maxuv)
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{
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// return max possible texcoord.
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int uv = br;
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// Confirmed on hardware if the size exceeds 1024, it basically gets masked so you end up with a 1x1 pixel (Except Region Clamp).
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if (limit > 1024)
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limit = 0;
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if (wm == CLAMP_CLAMP)
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{
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if (uv > limit)
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uv = limit;
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}
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else if (wm == CLAMP_REPEAT)
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{
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if (tl < 0)
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uv = limit; // wrap around
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else if (uv > limit)
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uv = limit;
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}
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else if (wm == CLAMP_REGION_CLAMP)
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{
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if (uv < minuv)
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uv = minuv;
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if (uv > maxuv)
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uv = maxuv;
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}
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else if (wm == CLAMP_REGION_REPEAT)
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{
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// REGION_REPEAT adhears to the original texture size, even if offset outside the texture (with MAXUV).
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minuv &= limit;
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if (tl < 0)
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uv = minuv | maxuv; // wrap around, just use (any & mask) | fix.
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else
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uv = std::min(uv, minuv) | maxuv; // (any & mask) cannot be larger than mask, select br if that is smaller (not br & mask because there might be a larger value between tl and br when &'ed with the mask).
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}
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return uv;
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}
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static int reduce(int uv, int size)
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{
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while (size > 3 && (1 << (size - 1)) >= uv)
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{
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size--;
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}
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return size;
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}
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static int extend(int uv, int size)
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{
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while (size < 10 && (1 << size) < uv)
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{
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size++;
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}
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return size;
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}
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void GSDrawingContext::Reset()
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{
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std::memset(&XYOFFSET, 0, sizeof(XYOFFSET));
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std::memset(&TEX0, 0, sizeof(TEX0));
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std::memset(&TEX1, 0, sizeof(TEX1));
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std::memset(&CLAMP, 0, sizeof(CLAMP));
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std::memset(&MIPTBP1, 0, sizeof(MIPTBP1));
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std::memset(&MIPTBP2, 0, sizeof(MIPTBP2));
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std::memset(&SCISSOR, 0, sizeof(SCISSOR));
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std::memset(&ALPHA, 0, sizeof(ALPHA));
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std::memset(&TEST, 0, sizeof(TEST));
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std::memset(&FBA, 0, sizeof(FBA));
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std::memset(&FRAME, 0, sizeof(FRAME));
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std::memset(&ZBUF, 0, sizeof(ZBUF));
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}
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void GSDrawingContext::UpdateScissor()
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{
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// Scissor registers are inclusive of the upper bounds.
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const GSVector4i rscissor = GSVector4i(static_cast<int>(SCISSOR.SCAX0), static_cast<int>(SCISSOR.SCAY0),
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static_cast<int>(SCISSOR.SCAX1), static_cast<int>(SCISSOR.SCAY1));
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scissor.in = rscissor + GSVector4i::cxpr(0, 0, 1, 1);
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// Fixed-point scissor min/max, used for rejecting primitives which are entirely outside.
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scissor.cull = rscissor.sll32<4>();
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// Offset applied to vertices for culling, zw is for native resolution culling
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// We want to round subpixels down, because at least one pixel gets filled per scanline.
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scissor.xyof = GSVector4i::loadl(&XYOFFSET.U64).xyxy().sub32(GSVector4i::cxpr(0, 0, 15, 15));
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}
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GIFRegTEX0 GSDrawingContext::GetSizeFixedTEX0(const GSVector4& st, bool linear, bool mipmap) const
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{
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if (mipmap)
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return TEX0; // no mipmaping allowed
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// find the optimal value for TW/TH by analyzing vertex trace and clamping values, extending only for region modes where uv may be outside
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int tw = TEX0.TW;
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int th = TEX0.TH;
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int wms = (int)CLAMP.WMS;
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int wmt = (int)CLAMP.WMT;
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int minu = (int)CLAMP.MINU;
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int minv = (int)CLAMP.MINV;
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int maxu = (int)CLAMP.MAXU;
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int maxv = (int)CLAMP.MAXV;
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GSVector4 uvf = st;
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if (linear)
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{
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uvf += GSVector4(-0.5f, 0.5f).xxyy();
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}
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GSVector4i uv = GSVector4i(uvf.floor().xyzw(uvf.ceil()));
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uv.x = findmax(uv.x, uv.z, (1 << tw) - 1, wms, minu, maxu);
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uv.y = findmax(uv.y, uv.w, (1 << th) - 1, wmt, minv, maxv);
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if (tw + th >= 19) // smaller sizes aren't worth, they just create multiple entries in the textue cache and the saved memory is less
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{
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tw = reduce(uv.x, tw);
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th = reduce(uv.y, th);
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}
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if (wms == CLAMP_REGION_CLAMP || wms == CLAMP_REGION_REPEAT)
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{
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tw = extend(uv.x, tw);
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}
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if (wmt == CLAMP_REGION_CLAMP || wmt == CLAMP_REGION_REPEAT)
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{
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th = extend(uv.y, th);
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}
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GIFRegTEX0 res = TEX0;
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res.TW = tw > 10 ? 0 : tw;
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res.TH = th > 10 ? 0 : th;
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if (TEX0.TW != res.TW || TEX0.TH != res.TH)
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{
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GL_DBG("FixedTEX0 %05x %d %d tw %d=>%d th %d=>%d st (%.0f,%.0f,%.0f,%.0f) uvmax %d,%d wm %d,%d (%d,%d,%d,%d)",
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(int)TEX0.TBP0, (int)TEX0.TBW, (int)TEX0.PSM,
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(int)TEX0.TW, tw, (int)TEX0.TH, th,
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uvf.x, uvf.y, uvf.z, uvf.w,
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uv.x, uv.y,
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wms, wmt, minu, maxu, minv, maxv);
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}
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return res;
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}
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void GSDrawingContext::Dump(const std::string& filename)
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{
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// Append on purpose so env + context are merged into a single file
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FILE* fp = fopen(filename.c_str(), "at");
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if (!fp)
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return;
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fprintf(fp,
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"XYOFFSET\n"
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"\tX:%u\n"
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"\tY:%u\n\n",
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XYOFFSET.OFX, XYOFFSET.OFY);
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fprintf(fp,
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"MIPTBP1\n"
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"\tBP1:0x%x\n"
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"\tBW1:%u\n"
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"\tBP2:0x%x\n"
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"\tBW2:%u\n"
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"\tBP3:0x%x\n"
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"\tBW3:%u\n\n",
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static_cast<uint32_t>(MIPTBP1.TBP1), static_cast<uint32_t>(MIPTBP1.TBW1), static_cast<uint32_t>(MIPTBP1.TBP2),
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static_cast<uint32_t>(MIPTBP1.TBW2), static_cast<uint32_t>(MIPTBP1.TBP3), static_cast<uint32_t>(MIPTBP1.TBW3));
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fprintf(fp,
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"MIPTBP2\n"
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"\tBP4:0x%x\n"
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"\tBW4:%u\n"
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"\tBP5:0x%x\n"
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"\tBW5:%u\n"
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"\tBP6:0x%x\n"
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"\tBW6:%u\n\n",
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static_cast<uint32_t>(MIPTBP2.TBP4), static_cast<uint32_t>(MIPTBP2.TBW4), static_cast<uint32_t>(MIPTBP2.TBP5),
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static_cast<uint32_t>(MIPTBP2.TBW5), static_cast<uint32_t>(MIPTBP2.TBP6), static_cast<uint32_t>(MIPTBP2.TBW6));
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fprintf(fp,
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"TEX0\n"
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"\tTBP0:0x%x\n"
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"\tTBW:%u\n"
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"\tPSM:0x%x\n"
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"\tTW:%u\n"
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"\tTH:%u\n"
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"\tTCC:%u\n"
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"\tTFX:%u\n"
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"\tCBP:0x%x\n"
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"\tCPSM:0x%x\n"
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"\tCSM:%u\n"
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"\tCSA:%u\n"
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"\tCLD:%u\n\n",
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TEX0.TBP0, TEX0.TBW, TEX0.PSM, TEX0.TW, static_cast<uint32_t>(TEX0.TH), TEX0.TCC, TEX0.TFX, TEX0.CBP, TEX0.CPSM, TEX0.CSM, TEX0.CSA, TEX0.CLD);
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fprintf(fp,
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"TEX1\n"
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"\tLCM:%u\n"
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"\tMXL:%u\n"
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"\tMMAG:%u\n"
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"\tMMIN:%u\n"
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"\tMTBA:%u\n"
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"\tL:%u\n"
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"\tK:%d\n\n",
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TEX1.LCM, TEX1.MXL, TEX1.MMAG, TEX1.MMIN, TEX1.MTBA, TEX1.L, TEX1.K);
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fprintf(fp,
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"CLAMP\n"
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"\tWMS:%u\n"
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"\tWMT:%u\n"
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"\tMINU:%u\n"
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"\tMAXU:%u\n"
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"\tMAXV:%u\n"
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"\tMINV:%u\n\n",
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CLAMP.WMS, CLAMP.WMT, CLAMP.MINU, CLAMP.MAXU, CLAMP.MAXV, static_cast<uint32_t>(CLAMP.MINV));
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// TODO mimmap? (yes I'm lazy)
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fprintf(fp,
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"SCISSOR\n"
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"\tX0:%u\n"
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"\tX1:%u\n"
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"\tY0:%u\n"
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"\tY1:%u\n\n",
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SCISSOR.SCAX0, SCISSOR.SCAX1, SCISSOR.SCAY0, SCISSOR.SCAY1);
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fprintf(fp,
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"ALPHA\n"
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"\tA:%u\n"
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"\tB:%u\n"
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"\tC:%u\n"
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"\tD:%u\n"
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"\tFIX:%u\n",
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ALPHA.A, ALPHA.B, ALPHA.C, ALPHA.D, ALPHA.FIX);
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const char* col[3] = {"Cs", "Cd", "0"};
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const char* alpha[3] = {"As", "Ad", "Af"};
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fprintf(fp, "\t=> (%s - %s) * %s + %s\n\n", col[ALPHA.A], col[ALPHA.B], alpha[ALPHA.C], col[ALPHA.D]);
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fprintf(fp,
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"TEST\n"
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"\tATE:%u\n"
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"\tATST:%s\n"
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"\tAREF:%u\n"
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"\tAFAIL:%s\n"
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"\tDATE:%u\n"
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"\tDATM:%u\n"
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"\tZTE:%u\n"
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"\tZTST:%u\n\n",
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TEST.ATE, GSUtil::GetATSTName(TEST.ATST), TEST.AREF, GSUtil::GetAFAILName(TEST.AFAIL), TEST.DATE, TEST.DATM, TEST.ZTE, TEST.ZTST);
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fprintf(fp,
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"FBA\n"
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"\tFBA:%u\n\n",
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FBA.FBA);
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fprintf(fp,
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"FRAME\n"
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"\tFBP (*32):0x%x\n"
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"\tFBW:%u\n"
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"\tPSM:0x%x\n"
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"\tFBMSK:0x%x\n\n",
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FRAME.FBP * 32, FRAME.FBW, FRAME.PSM, FRAME.FBMSK);
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fprintf(fp,
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"ZBUF\n"
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"\tZBP (*32):0x%x\n"
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"\tPSM:0x%x\n"
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"\tZMSK:%u\n\n",
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ZBUF.ZBP * 32, ZBUF.PSM, ZBUF.ZMSK);
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fclose(fp);
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}
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