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https://github.com/dolphin-emu/dolphin.git
synced 2025-07-23 06:09:50 -06:00
Skip indirect operation for out of bounds indirect stages
This fixes rendering issues in Viewtiful Joe (https://bugs.dolphin-emu.org/issues/12525), but it is not entirely hardware accurate, as hardware testing showed other, more complex behavior in this case. However, it should be good enough for our purposes.
This commit is contained in:
Pokechu22
@ -289,34 +289,24 @@ ShaderCode GenPixelShader(APIType ApiType, const ShaderHostConfig& host_config,
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std::string_view in_index_name) {
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// in_index_name is the indirect stage, not the tev stage
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// bpmem_iref is packed differently from RAS1_IREF
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// This function assumes bpmem_iref is nonzero (i.e. matrix is not off, and the
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// indirect texture stage is enabled).
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out.Write("{{\n"
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" uint iref = bpmem_iref({});\n"
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" if ( iref != 0u)\n"
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" {{\n"
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" uint texcoord = bitfieldExtract(iref, 0, 3);\n"
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" uint texmap = bitfieldExtract(iref, 8, 3);\n"
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" int2 fixedPoint_uv = getTexCoord(texcoord);\n"
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" uint texcoord = bitfieldExtract(iref, 0, 3);\n"
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" uint texmap = bitfieldExtract(iref, 8, 3);\n"
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" int2 fixedPoint_uv = getTexCoord(texcoord);\n"
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"\n"
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" if (({} & 1u) == 0u)\n"
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" fixedPoint_uv = fixedPoint_uv >> " I_INDTEXSCALE "[{} >> 1].xy;\n"
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" else\n"
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" fixedPoint_uv = fixedPoint_uv >> " I_INDTEXSCALE "[{} >> 1].zw;\n"
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" if (({} & 1u) == 0u)\n"
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" fixedPoint_uv = fixedPoint_uv >> " I_INDTEXSCALE "[{} >> 1].xy;\n"
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" else\n"
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" fixedPoint_uv = fixedPoint_uv >> " I_INDTEXSCALE "[{} >> 1].zw;\n"
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"\n"
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" {} = sampleTexture(texmap, float3(float2(fixedPoint_uv) * " I_TEXDIMS
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"[texmap].xy, {})).abg;\n",
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" {} = sampleTexture(texmap, float3(float2(fixedPoint_uv) * " I_TEXDIMS
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"[texmap].xy, {})).abg;\n"
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"}}",
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in_index_name, in_index_name, in_index_name, in_index_name, out_var_name,
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stereo ? "float(layer)" : "0.0");
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// There is always a bit set in bpmem_iref if the data is valid (matrix is not off, and the
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// indirect texture stage is enabled). If the matrix is off, the result doesn't matter; if the
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// indirect texture stage is disabled, the result is undefined (and produces a glitchy pattern
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// on hardware, different from this).
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out.Write(" }}\n"
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" else\n"
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" {{\n"
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" {} = int3(0, 0, 0);\n"
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" }}\n"
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"}}\n",
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out_var_name);
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};
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// ======================
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@ -814,68 +804,77 @@ ShaderCode GenPixelShader(APIType ApiType, const ShaderHostConfig& host_config,
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BitfieldExtract<&TevStageIndirect::matrix_index>("tevind"));
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out.Write(" uint matrix_id = {};\n",
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BitfieldExtract<&TevStageIndirect::matrix_id>("tevind"));
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out.Write("\n");
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out.Write(" int3 indcoord;\n");
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out.Write(" int2 indtevtrans = int2(0, 0);\n"
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"\n");
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// There is always a bit set in bpmem_iref if the data is valid (matrix is not off, and the
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// indirect texture stage is enabled). If the matrix is off, the result doesn't matter; if the
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// indirect texture stage is disabled, the result is undefined (and produces a glitchy pattern
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// on hardware, different from this).
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// For the undefined case, we just skip applying the indirect operation, which is close enough.
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// Viewtiful Joe hits the undefined case (bug 12525).
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// Wrapping and add to previous still apply in this case (and when the stage is disabled).
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out.Write(" if (bpmem_iref(bt) != 0u) {{");
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out.Write(" int3 indcoord;\n");
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LookupIndirectTexture("indcoord", "bt");
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out.Write(" if (bs != 0u)\n"
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" s.AlphaBump = indcoord[bs - 1u];\n"
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" switch(fmt)\n"
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" {{\n"
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" case {:s}:\n",
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IndTexFormat::ITF_8);
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out.Write(" indcoord.x = indcoord.x + ((bias & 1u) != 0u ? -128 : 0);\n"
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" indcoord.y = indcoord.y + ((bias & 2u) != 0u ? -128 : 0);\n"
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" indcoord.z = indcoord.z + ((bias & 4u) != 0u ? -128 : 0);\n"
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" s.AlphaBump = s.AlphaBump & 0xf8;\n"
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" break;\n"
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" case {:s}:\n",
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IndTexFormat::ITF_5);
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out.Write(" indcoord.x = (indcoord.x & 0x1f) + ((bias & 1u) != 0u ? 1 : 0);\n"
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" indcoord.y = (indcoord.y & 0x1f) + ((bias & 2u) != 0u ? 1 : 0);\n"
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" indcoord.z = (indcoord.z & 0x1f) + ((bias & 4u) != 0u ? 1 : 0);\n"
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" s.AlphaBump = s.AlphaBump & 0xe0;\n"
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" break;\n"
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" case {:s}:\n",
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IndTexFormat::ITF_4);
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out.Write(" indcoord.x = (indcoord.x & 0x0f) + ((bias & 1u) != 0u ? 1 : 0);\n"
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" indcoord.y = (indcoord.y & 0x0f) + ((bias & 2u) != 0u ? 1 : 0);\n"
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" indcoord.z = (indcoord.z & 0x0f) + ((bias & 4u) != 0u ? 1 : 0);\n"
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" s.AlphaBump = s.AlphaBump & 0xf0;\n"
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" break;\n"
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" case {:s}:\n",
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IndTexFormat::ITF_3);
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out.Write(" indcoord.x = (indcoord.x & 0x07) + ((bias & 1u) != 0u ? 1 : 0);\n"
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" indcoord.y = (indcoord.y & 0x07) + ((bias & 2u) != 0u ? 1 : 0);\n"
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" indcoord.z = (indcoord.z & 0x07) + ((bias & 4u) != 0u ? 1 : 0);\n"
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" s.AlphaBump = s.AlphaBump & 0xf8;\n"
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" break;\n"
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" }}\n"
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"\n"
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" // Matrix multiply\n"
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" int2 indtevtrans = int2(0, 0);\n"
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" if (matrix_index != 0u)\n"
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" {{\n"
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" uint mtxidx = 2u * (matrix_index - 1u);\n"
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" int shift = " I_INDTEXMTX "[mtxidx].w;\n"
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"\n"
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" switch (matrix_id)\n"
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out.Write(" if (bs != 0u)\n"
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" s.AlphaBump = indcoord[bs - 1u];\n"
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" switch(fmt)\n"
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" {{\n"
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" case 0u: // 3x2 S0.10 matrix\n"
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" indtevtrans = int2(idot(" I_INDTEXMTX
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"[mtxidx].xyz, indcoord), idot(" I_INDTEXMTX "[mtxidx + 1u].xyz, indcoord)) >> 3;\n"
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" case {:s}:\n",
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IndTexFormat::ITF_8);
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out.Write(" indcoord.x = indcoord.x + ((bias & 1u) != 0u ? -128 : 0);\n"
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" indcoord.y = indcoord.y + ((bias & 2u) != 0u ? -128 : 0);\n"
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" indcoord.z = indcoord.z + ((bias & 4u) != 0u ? -128 : 0);\n"
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" s.AlphaBump = s.AlphaBump & 0xf8;\n"
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" break;\n"
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" case 1u: // S matrix, S17.7 format\n"
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" indtevtrans = (fixedPoint_uv * indcoord.xx) >> 8;\n"
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" case {:s}:\n",
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IndTexFormat::ITF_5);
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out.Write(" indcoord.x = (indcoord.x & 0x1f) + ((bias & 1u) != 0u ? 1 : 0);\n"
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" indcoord.y = (indcoord.y & 0x1f) + ((bias & 2u) != 0u ? 1 : 0);\n"
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" indcoord.z = (indcoord.z & 0x1f) + ((bias & 4u) != 0u ? 1 : 0);\n"
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" s.AlphaBump = s.AlphaBump & 0xe0;\n"
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" break;\n"
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" case 2u: // T matrix, S17.7 format\n"
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" indtevtrans = (fixedPoint_uv * indcoord.yy) >> 8;\n"
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" case {:s}:\n",
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IndTexFormat::ITF_4);
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out.Write(" indcoord.x = (indcoord.x & 0x0f) + ((bias & 1u) != 0u ? 1 : 0);\n"
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" indcoord.y = (indcoord.y & 0x0f) + ((bias & 2u) != 0u ? 1 : 0);\n"
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" indcoord.z = (indcoord.z & 0x0f) + ((bias & 4u) != 0u ? 1 : 0);\n"
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" s.AlphaBump = s.AlphaBump & 0xf0;\n"
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" break;\n"
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" case {:s}:\n",
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IndTexFormat::ITF_3);
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out.Write(" indcoord.x = (indcoord.x & 0x07) + ((bias & 1u) != 0u ? 1 : 0);\n"
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" indcoord.y = (indcoord.y & 0x07) + ((bias & 2u) != 0u ? 1 : 0);\n"
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" indcoord.z = (indcoord.z & 0x07) + ((bias & 4u) != 0u ? 1 : 0);\n"
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" s.AlphaBump = s.AlphaBump & 0xf8;\n"
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" break;\n"
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" }}\n"
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"\n"
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" if (shift >= 0)\n"
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" indtevtrans = indtevtrans >> shift;\n"
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" else\n"
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" indtevtrans = indtevtrans << ((-shift) & 31);\n"
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" // Matrix multiply\n"
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" if (matrix_index != 0u)\n"
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" {{\n"
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" uint mtxidx = 2u * (matrix_index - 1u);\n"
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" int shift = " I_INDTEXMTX "[mtxidx].w;\n"
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"\n"
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" switch (matrix_id)\n"
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" {{\n"
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" case 0u: // 3x2 S0.10 matrix\n"
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" indtevtrans = int2(idot(" I_INDTEXMTX
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"[mtxidx].xyz, indcoord), idot(" I_INDTEXMTX "[mtxidx + 1u].xyz, indcoord)) >> 3;\n"
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" break;\n"
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" case 1u: // S matrix, S17.7 format\n"
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" indtevtrans = (fixedPoint_uv * indcoord.xx) >> 8;\n"
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" break;\n"
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" case 2u: // T matrix, S17.7 format\n"
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" indtevtrans = (fixedPoint_uv * indcoord.yy) >> 8;\n"
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" break;\n"
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" }}\n"
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"\n"
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" if (shift >= 0)\n"
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" indtevtrans = indtevtrans >> shift;\n"
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" else\n"
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" indtevtrans = indtevtrans << ((-shift) & 31);\n"
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" }}\n"
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" }}\n"
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"\n"
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" // Wrapping\n"
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