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https://github.com/dolphin-emu/dolphin.git
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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
parent
1827e7a166
commit
5928182a4c
@ -810,16 +810,6 @@ ShaderCode GeneratePixelShaderCode(APIType api_type, const ShaderHostConfig& hos
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SampleTexture(out, "float2(tempcoord)", "abg", texmap, stereo, api_type);
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}
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}
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for (u32 i = uid_data->genMode_numindstages; i < 4; i++)
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{
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// Referencing a stage above the number of ind stages is undefined behavior,
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// and on console produces a noise pattern (details unknown).
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// TODO: This behavior is nowhere near that, but it ensures the shader still compiles.
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if ((uid_data->nIndirectStagesUsed & (1U << i)) != 0)
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{
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out.Write("\tint3 iindtex{} = int3(0, 0, 0); // Undefined behavior on console\n", i);
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}
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}
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for (u32 i = 0; i < numStages; i++)
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{
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@ -967,9 +957,17 @@ static void WriteStage(ShaderCode& out, const pixel_shader_uid_data* uid_data, i
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const TevStageIndirect tevind{.hex = stage.tevind};
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out.Write("\t// indirect op\n");
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// Quirk: Referencing a stage above the number of ind stages is undefined behavior,
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// and on console produces a noise pattern (details unknown).
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// Instead, just skip applying the indirect operation, which is close enough.
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// We need to do *something*, as there won't be an iindtex variable otherwise.
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// Viewtiful Joe hits this 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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const bool has_ind_stage = tevind.bt < uid_data->genMode_numindstages;
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// Perform the indirect op on the incoming regular coordinates
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// using iindtex{} as the offset coords
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if (tevind.bs != IndTexBumpAlpha::Off)
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if (has_ind_stage && tevind.bs != IndTexBumpAlpha::Off)
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{
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static constexpr std::array<const char*, 4> tev_ind_alpha_sel{
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"",
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@ -995,7 +993,7 @@ static void WriteStage(ShaderCode& out, const pixel_shader_uid_data* uid_data, i
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// TODO: Should we reset alphabump to 0 here?
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}
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if (tevind.matrix_index != IndMtxIndex::Off)
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if (has_ind_stage && tevind.matrix_index != IndMtxIndex::Off)
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{
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// format
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static constexpr std::array<const char*, 4> tev_ind_fmt_mask{
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@ -1123,8 +1121,11 @@ static void WriteStage(ShaderCode& out, const pixel_shader_uid_data* uid_data, i
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else
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{
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out.Write("\tint2 indtevtrans{} = int2(0, 0);\n", n);
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// If matrix_index is Off (0), matrix_id should be Indirect (0)
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ASSERT(tevind.matrix_id == IndMtxId::Indirect);
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if (tevind.matrix_index == IndMtxIndex::Off)
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{
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// If matrix_index is Off (0), matrix_id should be Indirect (0)
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ASSERT(tevind.matrix_id == IndMtxId::Indirect);
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}
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}
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// ---------
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@ -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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