// Copyright 2013 Dolphin Emulator Project // Licensed under GPLv2 // Refer to the license.txt file included. #include #include #include #include "VideoCommon/BoundingBox.h" #include "VideoCommon/BPMemory.h" #include "VideoCommon/ConstantManager.h" #include "VideoCommon/DriverDetails.h" #include "VideoCommon/LightingShaderGen.h" #include "VideoCommon/NativeVertexFormat.h" #include "VideoCommon/PixelShaderGen.h" #include "VideoCommon/VertexShaderGen.h" #include "VideoCommon/VideoConfig.h" #include "VideoCommon/XFMemory.h" // for texture projection mode static const char *tevKSelTableC[] = { "255,255,255", // 1 = 0x00 "223,223,223", // 7_8 = 0x01 "191,191,191", // 3_4 = 0x02 "159,159,159", // 5_8 = 0x03 "128,128,128", // 1_2 = 0x04 "96,96,96", // 3_8 = 0x05 "64,64,64", // 1_4 = 0x06 "32,32,32", // 1_8 = 0x07 "0,0,0", // INVALID = 0x08 "0,0,0", // INVALID = 0x09 "0,0,0", // INVALID = 0x0a "0,0,0", // INVALID = 0x0b I_KCOLORS"[0].rgb", // K0 = 0x0C I_KCOLORS"[1].rgb", // K1 = 0x0D I_KCOLORS"[2].rgb", // K2 = 0x0E I_KCOLORS"[3].rgb", // K3 = 0x0F I_KCOLORS"[0].rrr", // K0_R = 0x10 I_KCOLORS"[1].rrr", // K1_R = 0x11 I_KCOLORS"[2].rrr", // K2_R = 0x12 I_KCOLORS"[3].rrr", // K3_R = 0x13 I_KCOLORS"[0].ggg", // K0_G = 0x14 I_KCOLORS"[1].ggg", // K1_G = 0x15 I_KCOLORS"[2].ggg", // K2_G = 0x16 I_KCOLORS"[3].ggg", // K3_G = 0x17 I_KCOLORS"[0].bbb", // K0_B = 0x18 I_KCOLORS"[1].bbb", // K1_B = 0x19 I_KCOLORS"[2].bbb", // K2_B = 0x1A I_KCOLORS"[3].bbb", // K3_B = 0x1B I_KCOLORS"[0].aaa", // K0_A = 0x1C I_KCOLORS"[1].aaa", // K1_A = 0x1D I_KCOLORS"[2].aaa", // K2_A = 0x1E I_KCOLORS"[3].aaa", // K3_A = 0x1F }; static const char *tevKSelTableA[] = { "255", // 1 = 0x00 "223", // 7_8 = 0x01 "191", // 3_4 = 0x02 "159", // 5_8 = 0x03 "128", // 1_2 = 0x04 "96", // 3_8 = 0x05 "64", // 1_4 = 0x06 "32", // 1_8 = 0x07 "0", // INVALID = 0x08 "0", // INVALID = 0x09 "0", // INVALID = 0x0a "0", // INVALID = 0x0b "0", // INVALID = 0x0c "0", // INVALID = 0x0d "0", // INVALID = 0x0e "0", // INVALID = 0x0f I_KCOLORS"[0].r", // K0_R = 0x10 I_KCOLORS"[1].r", // K1_R = 0x11 I_KCOLORS"[2].r", // K2_R = 0x12 I_KCOLORS"[3].r", // K3_R = 0x13 I_KCOLORS"[0].g", // K0_G = 0x14 I_KCOLORS"[1].g", // K1_G = 0x15 I_KCOLORS"[2].g", // K2_G = 0x16 I_KCOLORS"[3].g", // K3_G = 0x17 I_KCOLORS"[0].b", // K0_B = 0x18 I_KCOLORS"[1].b", // K1_B = 0x19 I_KCOLORS"[2].b", // K2_B = 0x1A I_KCOLORS"[3].b", // K3_B = 0x1B I_KCOLORS"[0].a", // K0_A = 0x1C I_KCOLORS"[1].a", // K1_A = 0x1D I_KCOLORS"[2].a", // K2_A = 0x1E I_KCOLORS"[3].a", // K3_A = 0x1F }; static const char *tevCInputTable[] = { "prev.rgb", // CPREV, "prev.aaa", // APREV, "c0.rgb", // C0, "c0.aaa", // A0, "c1.rgb", // C1, "c1.aaa", // A1, "c2.rgb", // C2, "c2.aaa", // A2, "textemp.rgb", // TEXC, "textemp.aaa", // TEXA, "rastemp.rgb", // RASC, "rastemp.aaa", // RASA, "int3(255,255,255)", // ONE "int3(128,128,128)", // HALF "konsttemp.rgb", // KONST "int3(0,0,0)", // ZERO }; static const char *tevAInputTable[] = { "prev.a", // APREV, "c0.a", // A0, "c1.a", // A1, "c2.a", // A2, "textemp.a", // TEXA, "rastemp.a", // RASA, "konsttemp.a", // KONST, (hw1 had quarter) "0", // ZERO }; static const char *tevRasTable[] = { "iround(col0 * 255.0)", "iround(col1 * 255.0)", "ERROR13", //2 "ERROR14", //3 "ERROR15", //4 "(int4(1, 1, 1, 1) * alphabump)", // bump alpha (0..248) "(int4(1, 1, 1, 1) * (alphabump | (alphabump >> 5)))", // normalized bump alpha (0..255) "int4(0, 0, 0, 0)", // zero }; static const char *tevCOutputTable[] = { "prev.rgb", "c0.rgb", "c1.rgb", "c2.rgb" }; static const char *tevAOutputTable[] = { "prev.a", "c0.a", "c1.a", "c2.a" }; static char text[16384]; template static inline void WriteStage(T& out, pixel_shader_uid_data* uid_data, int n, API_TYPE ApiType, const char swapModeTable[4][5]); template static inline void WriteTevRegular(T& out, const char* components, int bias, int op, int clamp, int shift); template static inline void SampleTexture(T& out, const char *texcoords, const char *texswap, int texmap, API_TYPE ApiType); template static inline void WriteAlphaTest(T& out, pixel_shader_uid_data* uid_data, API_TYPE ApiType,DSTALPHA_MODE dstAlphaMode, bool per_pixel_depth); template static inline void WriteFog(T& out, pixel_shader_uid_data* uid_data); template static inline void GeneratePixelShader(T& out, DSTALPHA_MODE dstAlphaMode, API_TYPE ApiType, u32 components) { // Non-uid template parameters will write to the dummy data (=> gets optimized out) pixel_shader_uid_data dummy_data; pixel_shader_uid_data* uid_data = out.template GetUidData(); if (uid_data == nullptr) uid_data = &dummy_data; out.SetBuffer(text); const bool is_writing_shadercode = (out.GetBuffer() != nullptr); if (is_writing_shadercode) text[sizeof(text) - 1] = 0x7C; // canary unsigned int numStages = bpmem.genMode.numtevstages + 1; unsigned int numTexgen = bpmem.genMode.numtexgens; out.Write("//Pixel Shader for TEV stages\n"); out.Write("//%i TEV stages, %i texgens, %i IND stages\n", numStages, numTexgen, bpmem.genMode.numindstages); uid_data->dstAlphaMode = dstAlphaMode; uid_data->genMode_numindstages = bpmem.genMode.numindstages; uid_data->genMode_numtevstages = bpmem.genMode.numtevstages; uid_data->genMode_numtexgens = bpmem.genMode.numtexgens; // dot product for integer vectors out.Write("int idot(int3 x, int3 y)\n" "{\n" "\tint3 tmp = x * y;\n" "\treturn tmp.x + tmp.y + tmp.z;\n" "}\n"); out.Write("int idot(int4 x, int4 y)\n" "{\n" "\tint4 tmp = x * y;\n" "\treturn tmp.x + tmp.y + tmp.z + tmp.w;\n" "}\n\n"); // rounding + casting to integer at once in a single function out.Write("int iround(float x) { return int (round(x)); }\n" "int2 iround(float2 x) { return int2(round(x)); }\n" "int3 iround(float3 x) { return int3(round(x)); }\n" "int4 iround(float4 x) { return int4(round(x)); }\n\n"); out.Write("int itrunc(float x) { return int (trunc(x)); }\n" "int2 itrunc(float2 x) { return int2(trunc(x)); }\n" "int3 itrunc(float3 x) { return int3(trunc(x)); }\n" "int4 itrunc(float4 x) { return int4(trunc(x)); }\n\n"); if (DriverDetails::HasBug(DriverDetails::BUG_BROKENIVECSHIFTS)) { // Add functions to do shifts on scalars and ivecs. // These functions all have the same name to enable them to be used no matter what code is generated. // For example: tev color op code uses .rgb as a swizzle, but alpha code only uses .a. out.Write("int ilshift(int a, int b) { return a << b; }\n" "int irshift(int a, int b) { return a >> b; }\n" "int2 ilshift(int2 a, int2 b) { return int2(a.x << b.x, a.y << b.y); }\n" "int2 ilshift(int2 a, int b) { return int2(a.x << b, a.y << b); }\n" "int2 irshift(int2 a, int2 b) { return int2(a.x >> b.x, a.y >> b.y); }\n" "int2 irshift(int2 a, int b) { return int2(a.x >> b, a.y >> b); }\n" "int3 ilshift(int3 a, int3 b) { return int3(a.x << b.x, a.y << b.y, a.z << b.z); }\n" "int3 ilshift(int3 a, int b) { return int3(a.x << b, a.y << b, a.z << b); }\n" "int3 irshift(int3 a, int3 b) { return int3(a.x >> b.x, a.y >> b.y, a.z >> b.z); }\n" "int3 irshift(int3 a, int b) { return int3(a.x >> b, a.y >> b, a.z >> b); }\n" "int4 ilshift(int4 a, int4 b) { return int4(a.x << b.x, a.y << b.y, a.z << b.z, a.w << b.w); }\n" "int4 ilshift(int4 a, int b) { return int4(a.x << b, a.y << b, a.z << b, a.w << b); }\n" "int4 irshift(int4 a, int4 b) { return int4(a.x >> b.x, a.y >> b.y, a.z >> b.z, a.w >> b.w); }\n" "int4 irshift(int4 a, int b) { return int4(a.x >> b, a.y >> b, a.z >> b, a.w >> b); }\n\n"); } if (ApiType == API_OPENGL) { // Declare samplers for (int i = 0; i < 8; ++i) out.Write("SAMPLER_BINDING(%d) uniform sampler2DArray samp%d;\n", i, i); } else // D3D { // Declare samplers for (int i = 0; i < 8; ++i) out.Write("sampler samp%d : register(s%d);\n", i, i); out.Write("\n"); for (int i = 0; i < 8; ++i) out.Write("Texture2DArray Tex%d : register(t%d);\n", i, i); } out.Write("\n"); if (ApiType == API_OPENGL) { out.Write("layout(std140%s) uniform PSBlock {\n", g_ActiveConfig.backend_info.bSupportsBindingLayout ? ", binding = 1" : ""); } else { out.Write("cbuffer PSBlock : register(b0) {\n"); } out.Write( "\tint4 " I_COLORS"[4];\n" "\tint4 " I_KCOLORS"[4];\n" "\tint4 " I_ALPHA";\n" "\tfloat4 " I_TEXDIMS"[8];\n" "\tint4 " I_ZBIAS"[2];\n" "\tint4 " I_INDTEXSCALE"[2];\n" "\tint4 " I_INDTEXMTX"[6];\n" "\tint4 " I_FOGCOLOR";\n" "\tint4 " I_FOGI";\n" "\tfloat4 " I_FOGF"[2];\n" "\tfloat4 " I_ZSLOPE";\n" "\tfloat4 " I_EFBSCALE";\n" "};\n"); if (g_ActiveConfig.bEnablePixelLighting) { out.Write("%s", s_lighting_struct); if (ApiType == API_OPENGL) { out.Write("layout(std140%s) uniform VSBlock {\n", g_ActiveConfig.backend_info.bSupportsBindingLayout ? ", binding = 2" : ""); } else { out.Write("cbuffer VSBlock : register(b1) {\n"); } out.Write(s_shader_uniforms); out.Write("};\n"); } if (g_ActiveConfig.backend_info.bSupportsBBox) { if (ApiType == API_OPENGL) { out.Write( "layout(std140, binding = 3) buffer BBox {\n" "\tint4 bbox_data;\n" "};\n" ); } else { out.Write( "globallycoherent RWBuffer bbox_data : register(u2);\n" ); } } out.Write("struct VS_OUTPUT {\n"); GenerateVSOutputMembers(out, ApiType); out.Write("};\n"); const bool forced_early_z = g_ActiveConfig.backend_info.bSupportsEarlyZ && bpmem.UseEarlyDepthTest() && (g_ActiveConfig.bFastDepthCalc || bpmem.alpha_test.TestResult() == AlphaTest::UNDETERMINED) // We can't allow early_ztest for zfreeze because depth is overridden per-pixel. // This means it's impossible for zcomploc to be emulated on a zfrozen polygon. && !(bpmem.zmode.testenable && bpmem.genMode.zfreeze); const bool per_pixel_depth = (bpmem.ztex2.op != ZTEXTURE_DISABLE && bpmem.UseLateDepthTest()) || (!g_ActiveConfig.bFastDepthCalc && bpmem.zmode.testenable && !forced_early_z) || (bpmem.zmode.testenable && bpmem.genMode.zfreeze); if (forced_early_z) { // Zcomploc (aka early_ztest) is a way to control whether depth test is done before // or after texturing and alpha test. PC graphics APIs used to provide no way to emulate // this feature properly until 2012: Depth tests were always done after alpha testing. // Most importantly, it was not possible to write to the depth buffer without also writing // a color value (unless color writing was disabled altogether). // OpenGL has a flag which allows the driver to still update the depth buffer if alpha // test fails. The driver isn't required to do this, but I (degasus) assume all of them do // because it's the much faster code path for the GPU. // D3D11 also has a way to force the driver to enable early-z, so we're fine here. if(ApiType == API_OPENGL) { out.Write("layout(early_fragment_tests) in;\n"); } else { out.Write("[earlydepthstencil]\n"); } } else if (bpmem.UseEarlyDepthTest() && (g_ActiveConfig.bFastDepthCalc || bpmem.alpha_test.TestResult() == AlphaTest::UNDETERMINED) && is_writing_shadercode) { static bool warn_once = true; if (warn_once) WARN_LOG(VIDEO, "Early z test enabled but not possible to emulate with current configuration. Make sure to enable fast depth calculations. If this message still shows up your hardware isn't able to emulate the feature properly (a GPU with D3D 11.0 / OGL 4.2 support is required)."); warn_once = false; } if (ApiType == API_OPENGL) { out.Write("out vec4 ocol0;\n"); if (dstAlphaMode == DSTALPHA_DUAL_SOURCE_BLEND) out.Write("out vec4 ocol1;\n"); if (per_pixel_depth) out.Write("#define depth gl_FragDepth\n"); // We use the flag "centroid" to fix some MSAA rendering bugs. With MSAA, the // pixel shader will be executed for each pixel which has at least one passed sample. // So there may be rendered pixels where the center of the pixel isn't in the primitive. // As the pixel shader usually renders at the center of the pixel, this position may be // outside the primitive. This will lead to sampling outside the texture, sign changes, ... // As a workaround, we interpolate at the centroid of the coveraged pixel, which // is always inside the primitive. // Without MSAA, this flag is defined to have no effect. uid_data->stereo = g_ActiveConfig.iStereoMode > 0; if (g_ActiveConfig.backend_info.bSupportsGeometryShaders) { out.Write("in VertexData {\n"); GenerateVSOutputMembers(out, ApiType, g_ActiveConfig.backend_info.bSupportsBindingLayout ? "centroid" : "centroid in"); if (g_ActiveConfig.iStereoMode > 0) out.Write("\tflat int layer;\n"); out.Write("};\n"); } else { out.Write("centroid in float4 colors_0;\n"); out.Write("centroid in float4 colors_1;\n"); // compute window position if needed because binding semantic WPOS is not widely supported // Let's set up attributes for (unsigned int i = 0; i < numTexgen; ++i) { out.Write("centroid in float3 uv%d;\n", i); } out.Write("centroid in float4 clipPos;\n"); if (g_ActiveConfig.bEnablePixelLighting) { out.Write("centroid in float3 Normal;\n"); out.Write("centroid in float3 WorldPos;\n"); } } out.Write("void main()\n{\n"); if (g_ActiveConfig.backend_info.bSupportsGeometryShaders) { for (unsigned int i = 0; i < numTexgen; ++i) out.Write("\tfloat3 uv%d = tex%d;\n", i, i); } out.Write("\tfloat4 rawpos = gl_FragCoord;\n"); } else // D3D { out.Write("void main(\n"); out.Write(" out float4 ocol0 : SV_Target0,%s%s\n in float4 rawpos : SV_Position,\n", dstAlphaMode == DSTALPHA_DUAL_SOURCE_BLEND ? "\n out float4 ocol1 : SV_Target1," : "", per_pixel_depth ? "\n out float depth : SV_Depth," : ""); out.Write(" in centroid float4 colors_0 : COLOR0,\n"); out.Write(" in centroid float4 colors_1 : COLOR1\n"); // compute window position if needed because binding semantic WPOS is not widely supported for (unsigned int i = 0; i < numTexgen; ++i) out.Write(",\n in centroid float3 uv%d : TEXCOORD%d", i, i); out.Write(",\n in centroid float4 clipPos : TEXCOORD%d", numTexgen); if (g_ActiveConfig.bEnablePixelLighting) { out.Write(",\n in centroid float3 Normal : TEXCOORD%d", numTexgen + 1); out.Write(",\n in centroid float3 WorldPos : TEXCOORD%d", numTexgen + 2); } uid_data->stereo = g_ActiveConfig.iStereoMode > 0; if (g_ActiveConfig.iStereoMode > 0) out.Write(",\n in uint layer : SV_RenderTargetArrayIndex\n"); out.Write(" ) {\n"); } out.Write("\tint4 c0 = " I_COLORS"[1], c1 = " I_COLORS"[2], c2 = " I_COLORS"[3], prev = " I_COLORS"[0];\n" "\tint4 rastemp = int4(0, 0, 0, 0), textemp = int4(0, 0, 0, 0), konsttemp = int4(0, 0, 0, 0);\n" "\tint3 comp16 = int3(1, 256, 0), comp24 = int3(1, 256, 256*256);\n" "\tint alphabump=0;\n" "\tint3 tevcoord=int3(0, 0, 0);\n" "\tint2 wrappedcoord=int2(0,0), tempcoord=int2(0,0);\n" "\tint4 tevin_a=int4(0,0,0,0),tevin_b=int4(0,0,0,0),tevin_c=int4(0,0,0,0),tevin_d=int4(0,0,0,0);\n\n"); // tev combiner inputs // On GLSL, input variables must not be assigned to. // This is why we declare these variables locally instead. out.Write("\tfloat4 col0 = colors_0;\n"); out.Write("\tfloat4 col1 = colors_1;\n"); if (g_ActiveConfig.bEnablePixelLighting) { out.Write("\tfloat3 _norm0 = normalize(Normal.xyz);\n\n"); out.Write("\tfloat3 pos = WorldPos;\n"); out.Write("\tint4 lacc;\n" "\tfloat3 ldir, h, cosAttn, distAttn;\n" "\tfloat dist, dist2, attn;\n"); // TODO: Our current constant usage code isn't able to handle more than one buffer. // So we can't mark the VS constant as used here. But keep them here as reference. //out.SetConstantsUsed(C_PLIGHT_COLORS, C_PLIGHT_COLORS+7); // TODO: Can be optimized further //out.SetConstantsUsed(C_PLIGHTS, C_PLIGHTS+31); // TODO: Can be optimized further //out.SetConstantsUsed(C_PMATERIALS, C_PMATERIALS+3); uid_data->components = components; GenerateLightingShader(out, uid_data->lighting, components, "colors_", "col"); } // HACK to handle cases where the tex gen is not enabled if (numTexgen == 0) { out.Write("\tint2 fixpoint_uv0 = int2(0, 0);\n\n"); } else { out.SetConstantsUsed(C_TEXDIMS, C_TEXDIMS+numTexgen-1); for (unsigned int i = 0; i < numTexgen; ++i) { out.Write("\tint2 fixpoint_uv%d = itrunc(", i); // optional perspective divides uid_data->texMtxInfo_n_projection |= xfmem.texMtxInfo[i].projection << i; if (xfmem.texMtxInfo[i].projection == XF_TEXPROJ_STQ) { out.Write("(uv%d.z == 0.0 ? uv%d.xy : uv%d.xy / uv%d.z)", i, i, i, i); } else { out.Write("uv%d.xy", i); } out.Write(" * " I_TEXDIMS"[%d].zw * 128.0);\n", i); // TODO: S24 overflows here? } } // indirect texture map lookup int nIndirectStagesUsed = 0; if (bpmem.genMode.numindstages > 0) { for (unsigned int i = 0; i < numStages; ++i) { if (bpmem.tevind[i].IsActive() && bpmem.tevind[i].bt < bpmem.genMode.numindstages) nIndirectStagesUsed |= 1 << bpmem.tevind[i].bt; } } uid_data->nIndirectStagesUsed = nIndirectStagesUsed; for (u32 i = 0; i < bpmem.genMode.numindstages; ++i) { if (nIndirectStagesUsed & (1 << i)) { unsigned int texcoord = bpmem.tevindref.getTexCoord(i); unsigned int texmap = bpmem.tevindref.getTexMap(i); uid_data->SetTevindrefValues(i, texcoord, texmap); if (texcoord < numTexgen) { out.SetConstantsUsed(C_INDTEXSCALE+i/2,C_INDTEXSCALE+i/2); if (DriverDetails::HasBug(DriverDetails::BUG_BROKENIVECSHIFTS)) out.Write("\ttempcoord = irshift(fixpoint_uv%d, " I_INDTEXSCALE"[%d].%s);\n", texcoord, i / 2, (i & 1) ? "zw" : "xy"); else out.Write("\ttempcoord = fixpoint_uv%d >> " I_INDTEXSCALE"[%d].%s;\n", texcoord, i / 2, (i & 1) ? "zw" : "xy"); } else out.Write("\ttempcoord = int2(0, 0);\n"); out.Write("\tint3 iindtex%d = ", i); SampleTexture(out, "(float2(tempcoord)/128.0)", "abg", texmap, ApiType); } } // Uid fields for BuildSwapModeTable are set in WriteStage char swapModeTable[4][5]; const char* swapColors = "rgba"; for (int i = 0; i < 4; i++) { swapModeTable[i][0] = swapColors[bpmem.tevksel[i*2].swap1]; swapModeTable[i][1] = swapColors[bpmem.tevksel[i*2].swap2]; swapModeTable[i][2] = swapColors[bpmem.tevksel[i*2+1].swap1]; swapModeTable[i][3] = swapColors[bpmem.tevksel[i*2+1].swap2]; swapModeTable[i][4] = '\0'; } for (unsigned int i = 0; i < numStages; i++) WriteStage(out, uid_data, i, ApiType, swapModeTable); // build the equation for this stage #define MY_STRUCT_OFFSET(str,elem) ((u32)((u64)&(str).elem-(u64)&(str))) bool enable_pl = g_ActiveConfig.bEnablePixelLighting; uid_data->num_values = (enable_pl) ? sizeof(*uid_data) : MY_STRUCT_OFFSET(*uid_data,stagehash[numStages]); if (numStages) { // The results of the last texenv stage are put onto the screen, // regardless of the used destination register if (bpmem.combiners[numStages - 1].colorC.dest != 0) { out.Write("\tprev.rgb = %s;\n", tevCOutputTable[bpmem.combiners[numStages - 1].colorC.dest]); } if (bpmem.combiners[numStages - 1].alphaC.dest != 0) { out.Write("\tprev.a = %s;\n", tevAOutputTable[bpmem.combiners[numStages - 1].alphaC.dest]); } } out.Write("\tprev = prev & 255;\n"); AlphaTest::TEST_RESULT Pretest = bpmem.alpha_test.TestResult(); uid_data->Pretest = Pretest; // NOTE: Fragment may not be discarded if alpha test always fails and early depth test is enabled // (in this case we need to write a depth value if depth test passes regardless of the alpha testing result) if (Pretest == AlphaTest::UNDETERMINED || (Pretest == AlphaTest::FAIL && bpmem.UseLateDepthTest())) WriteAlphaTest(out, uid_data, ApiType, dstAlphaMode, per_pixel_depth); if (bpmem.genMode.zfreeze) { out.SetConstantsUsed(C_ZSLOPE, C_ZSLOPE); out.SetConstantsUsed(C_EFBSCALE, C_EFBSCALE); out.Write("\tfloat2 screenpos = rawpos.xy * " I_EFBSCALE".xy;\n"); // Opengl has reversed vertical screenspace coordiantes if (ApiType == API_OPENGL) out.Write("\tscreenpos.y = %i - screenpos.y;\n", EFB_HEIGHT); out.Write("\tint zCoord = int(" I_ZSLOPE".z + " I_ZSLOPE".x * screenpos.x + " I_ZSLOPE".y * screenpos.y);\n"); } else if (!g_ActiveConfig.bFastDepthCalc) { // FastDepth means to trust the depth generated in perspective division. // It should be correct, but it seems not to be as accurate as required. TODO: Find out why! // For disabled FastDepth we just calculate the depth value again. // The performance impact of this additional calculation doesn't matter, but it prevents // the host GPU driver from performing any early depth test optimizations. out.SetConstantsUsed(C_ZBIAS+1, C_ZBIAS+1); // the screen space depth value = far z + (clip z / clip w) * z range out.Write("\tint zCoord = " I_ZBIAS"[1].x + int((clipPos.z / clipPos.w) * float(" I_ZBIAS"[1].y));\n"); } else { out.Write("\tint zCoord = int(rawpos.z * 16777216.0);\n"); } out.Write("\tzCoord = clamp(zCoord, " I_ZBIAS"[1].x - " I_ZBIAS"[1].y, " I_ZBIAS"[1].x);\n"); // depth texture can safely be ignored if the result won't be written to the depth buffer (early_ztest) and isn't used for fog either const bool skip_ztexture = !per_pixel_depth && !bpmem.fog.c_proj_fsel.fsel; uid_data->ztex_op = bpmem.ztex2.op; uid_data->per_pixel_depth = per_pixel_depth; uid_data->forced_early_z = forced_early_z; uid_data->fast_depth_calc = g_ActiveConfig.bFastDepthCalc; uid_data->early_ztest = bpmem.UseEarlyDepthTest(); uid_data->fog_fsel = bpmem.fog.c_proj_fsel.fsel; uid_data->zfreeze = bpmem.genMode.zfreeze; // Note: z-textures are not written to depth buffer if early depth test is used if (per_pixel_depth && bpmem.UseEarlyDepthTest()) { out.Write("\tdepth = float(zCoord) / 16777216.0;\n"); } // Note: depth texture output is only written to depth buffer if late depth test is used // theoretical final depth value is used for fog calculation, though, so we have to emulate ztextures anyway if (bpmem.ztex2.op != ZTEXTURE_DISABLE && !skip_ztexture) { // use the texture input of the last texture stage (textemp), hopefully this has been read and is in correct format... out.SetConstantsUsed(C_ZBIAS, C_ZBIAS+1); out.Write("\tzCoord = idot(" I_ZBIAS"[0].xyzw, textemp.xyzw) + " I_ZBIAS"[1].w %s;\n", (bpmem.ztex2.op == ZTEXTURE_ADD) ? "+ zCoord" : ""); out.Write("\tzCoord = zCoord & 0xFFFFFF;\n"); } if (per_pixel_depth && bpmem.UseLateDepthTest()) { out.Write("\tdepth = float(zCoord) / 16777216.0;\n"); } if (dstAlphaMode == DSTALPHA_ALPHA_PASS) { out.SetConstantsUsed(C_ALPHA, C_ALPHA); out.Write("\tocol0 = float4(float3(prev.rgb), float(" I_ALPHA".a)) / 255.0;\n"); } else { WriteFog(out, uid_data); out.Write("\tocol0 = float4(prev) / 255.0;\n"); } // Use dual-source color blending to perform dst alpha in a single pass if (dstAlphaMode == DSTALPHA_DUAL_SOURCE_BLEND) { out.SetConstantsUsed(C_ALPHA, C_ALPHA); // Colors will be blended against the alpha from ocol1 and // the alpha from ocol0 will be written to the framebuffer. out.Write("\tocol1 = float4(prev) / 255.0;\n"); out.Write("\tocol0.a = float(" I_ALPHA".a) / 255.0;\n"); } if (g_ActiveConfig.backend_info.bSupportsBBox && BoundingBox::active) { uid_data->bounding_box = true; const char* atomic_op = ApiType == API_OPENGL ? "atomic" : "Interlocked"; out.Write( "\tif(bbox_data[0] > int(rawpos.x)) %sMin(bbox_data[0], int(rawpos.x));\n" "\tif(bbox_data[1] < int(rawpos.x)) %sMax(bbox_data[1], int(rawpos.x));\n" "\tif(bbox_data[2] > int(rawpos.y)) %sMin(bbox_data[2], int(rawpos.y));\n" "\tif(bbox_data[3] < int(rawpos.y)) %sMax(bbox_data[3], int(rawpos.y));\n", atomic_op, atomic_op, atomic_op, atomic_op); } out.Write("}\n"); if (is_writing_shadercode) { if (text[sizeof(text) - 1] != 0x7C) PanicAlert("PixelShader generator - buffer too small, canary has been eaten!"); } } template static inline void WriteStage(T& out, pixel_shader_uid_data* uid_data, int n, API_TYPE ApiType, const char swapModeTable[4][5]) { int texcoord = bpmem.tevorders[n/2].getTexCoord(n&1); bool bHasTexCoord = (u32)texcoord < bpmem.genMode.numtexgens; bool bHasIndStage = bpmem.tevind[n].bt < bpmem.genMode.numindstages; // HACK to handle cases where the tex gen is not enabled if (!bHasTexCoord) texcoord = 0; out.Write("\n\t// TEV stage %d\n", n); uid_data->stagehash[n].hasindstage = bHasIndStage; uid_data->stagehash[n].tevorders_texcoord = texcoord; if (bHasIndStage) { uid_data->stagehash[n].tevind = bpmem.tevind[n].hex & 0x7FFFFF; out.Write("\t// indirect op\n"); // perform the indirect op on the incoming regular coordinates using iindtex%d as the offset coords if (bpmem.tevind[n].bs != ITBA_OFF) { const char *tevIndAlphaSel[] = {"", "x", "y", "z"}; const char *tevIndAlphaMask[] = {"248", "224", "240", "248"}; // 0b11111000, 0b11100000, 0b11110000, 0b11111000 out.Write("alphabump = iindtex%d.%s & %s;\n", bpmem.tevind[n].bt, tevIndAlphaSel[bpmem.tevind[n].bs], tevIndAlphaMask[bpmem.tevind[n].fmt]); } else { // TODO: Should we reset alphabump to 0 here? } if (bpmem.tevind[n].mid != 0) { // format const char *tevIndFmtMask[] = { "255", "31", "15", "7" }; out.Write("\tint3 iindtevcrd%d = iindtex%d & %s;\n", n, bpmem.tevind[n].bt, tevIndFmtMask[bpmem.tevind[n].fmt]); // bias - TODO: Check if this needs to be this complicated.. const char *tevIndBiasField[] = { "", "x", "y", "xy", "z", "xz", "yz", "xyz" }; // indexed by bias const char *tevIndBiasAdd[] = { "-128", "1", "1", "1" }; // indexed by fmt if (bpmem.tevind[n].bias == ITB_S || bpmem.tevind[n].bias == ITB_T || bpmem.tevind[n].bias == ITB_U) out.Write("\tiindtevcrd%d.%s += int(%s);\n", n, tevIndBiasField[bpmem.tevind[n].bias], tevIndBiasAdd[bpmem.tevind[n].fmt]); else if (bpmem.tevind[n].bias == ITB_ST || bpmem.tevind[n].bias == ITB_SU || bpmem.tevind[n].bias == ITB_TU) out.Write("\tiindtevcrd%d.%s += int2(%s, %s);\n", n, tevIndBiasField[bpmem.tevind[n].bias], tevIndBiasAdd[bpmem.tevind[n].fmt], tevIndBiasAdd[bpmem.tevind[n].fmt]); else if (bpmem.tevind[n].bias == ITB_STU) out.Write("\tiindtevcrd%d.%s += int3(%s, %s, %s);\n", n, tevIndBiasField[bpmem.tevind[n].bias], tevIndBiasAdd[bpmem.tevind[n].fmt], tevIndBiasAdd[bpmem.tevind[n].fmt], tevIndBiasAdd[bpmem.tevind[n].fmt]); // multiply by offset matrix and scale - calculations are likely to overflow badly, // yet it works out since we only care about the lower 23 bits (+1 sign bit) of the result if (bpmem.tevind[n].mid <= 3) { int mtxidx = 2*(bpmem.tevind[n].mid-1); out.SetConstantsUsed(C_INDTEXMTX+mtxidx, C_INDTEXMTX+mtxidx); if (DriverDetails::HasBug(DriverDetails::BUG_BROKENIVECSHIFTS)) { out.Write("\tint2 indtevtrans%d = irshift(int2(idot(" I_INDTEXMTX"[%d].xyz, iindtevcrd%d), idot(" I_INDTEXMTX"[%d].xyz, iindtevcrd%d)), 3);\n", n, mtxidx, n, mtxidx+1, n); // TODO: should use a shader uid branch for this for better performance out.Write("\tif (" I_INDTEXMTX"[%d].w >= 0) indtevtrans%d = irshift(indtevtrans%d, " I_INDTEXMTX"[%d].w);\n", mtxidx, n, n, mtxidx); out.Write("\telse indtevtrans%d = ilshift(indtevtrans%d, -" I_INDTEXMTX"[%d].w);\n", n, n, mtxidx); } else { out.Write("\tint2 indtevtrans%d = int2(idot(" I_INDTEXMTX"[%d].xyz, iindtevcrd%d), idot(" I_INDTEXMTX"[%d].xyz, iindtevcrd%d)) >> 3;\n", n, mtxidx, n, mtxidx+1, n); // TODO: should use a shader uid branch for this for better performance out.Write("\tif (" I_INDTEXMTX"[%d].w >= 0) indtevtrans%d = indtevtrans%d >> " I_INDTEXMTX"[%d].w;\n", mtxidx, n, n, mtxidx); out.Write("\telse indtevtrans%d = indtevtrans%d << (-" I_INDTEXMTX"[%d].w);\n", n, n, mtxidx); } } else if (bpmem.tevind[n].mid <= 7 && bHasTexCoord) { // s matrix _assert_(bpmem.tevind[n].mid >= 5); int mtxidx = 2*(bpmem.tevind[n].mid-5); out.SetConstantsUsed(C_INDTEXMTX+mtxidx, C_INDTEXMTX+mtxidx); if (DriverDetails::HasBug(DriverDetails::BUG_BROKENIVECSHIFTS)) { out.Write("\tint2 indtevtrans%d = irshift(int2(fixpoint_uv%d * iindtevcrd%d.xx), 8);\n", n, texcoord, n); out.Write("\tif (" I_INDTEXMTX"[%d].w >= 0) indtevtrans%d = irshift(indtevtrans%d, " I_INDTEXMTX"[%d].w);\n", mtxidx, n, n, mtxidx); out.Write("\telse indtevtrans%d = ilshift(indtevtrans%d, -" I_INDTEXMTX"[%d].w);\n", n, n, mtxidx); } else { out.Write("\tint2 indtevtrans%d = int2(fixpoint_uv%d * iindtevcrd%d.xx) >> 8;\n", n, texcoord, n); out.Write("\tif (" I_INDTEXMTX"[%d].w >= 0) indtevtrans%d = indtevtrans%d >> " I_INDTEXMTX"[%d].w;\n", mtxidx, n, n, mtxidx); out.Write("\telse indtevtrans%d = indtevtrans%d << (-" I_INDTEXMTX"[%d].w);\n", n, n, mtxidx); } } else if (bpmem.tevind[n].mid <= 11 && bHasTexCoord) { // t matrix _assert_(bpmem.tevind[n].mid >= 9); int mtxidx = 2*(bpmem.tevind[n].mid-9); out.SetConstantsUsed(C_INDTEXMTX+mtxidx, C_INDTEXMTX+mtxidx); if (DriverDetails::HasBug(DriverDetails::BUG_BROKENIVECSHIFTS)) { out.Write("\tint2 indtevtrans%d = irshift(int2(fixpoint_uv%d * iindtevcrd%d.yy), 8);\n", n, texcoord, n); out.Write("\tif (" I_INDTEXMTX"[%d].w >= 0) indtevtrans%d = irshift(indtevtrans%d, " I_INDTEXMTX"[%d].w);\n", mtxidx, n, n, mtxidx); out.Write("\telse indtevtrans%d = ilshift(indtevtrans%d, -" I_INDTEXMTX"[%d].w);\n", n, n, mtxidx); } else { out.Write("\tint2 indtevtrans%d = int2(fixpoint_uv%d * iindtevcrd%d.yy) >> 8;\n", n, texcoord, n); out.Write("\tif (" I_INDTEXMTX"[%d].w >= 0) indtevtrans%d = indtevtrans%d >> " I_INDTEXMTX"[%d].w;\n", mtxidx, n, n, mtxidx); out.Write("\telse indtevtrans%d = indtevtrans%d << (-" I_INDTEXMTX"[%d].w);\n", n, n, mtxidx); } } else { out.Write("\tint2 indtevtrans%d = int2(0, 0);\n", n); } } else { out.Write("\tint2 indtevtrans%d = int2(0, 0);\n", n); } // --------- // Wrapping // --------- const char *tevIndWrapStart[] = {"0", "(256<<7)", "(128<<7)", "(64<<7)", "(32<<7)", "(16<<7)", "1" }; // TODO: Should the last one be 1 or (1<<7)? // wrap S if (bpmem.tevind[n].sw == ITW_OFF) out.Write("\twrappedcoord.x = fixpoint_uv%d.x;\n", texcoord); else if (bpmem.tevind[n].sw == ITW_0) out.Write("\twrappedcoord.x = 0;\n"); else out.Write("\twrappedcoord.x = fixpoint_uv%d.x %% %s;\n", texcoord, tevIndWrapStart[bpmem.tevind[n].sw]); // wrap T if (bpmem.tevind[n].tw == ITW_OFF) out.Write("\twrappedcoord.y = fixpoint_uv%d.y;\n", texcoord); else if (bpmem.tevind[n].tw == ITW_0) out.Write("\twrappedcoord.y = 0;\n"); else out.Write("\twrappedcoord.y = fixpoint_uv%d.y %% %s;\n", texcoord, tevIndWrapStart[bpmem.tevind[n].tw]); if (bpmem.tevind[n].fb_addprev) // add previous tevcoord out.Write("\ttevcoord.xy += wrappedcoord + indtevtrans%d;\n", n); else out.Write("\ttevcoord.xy = wrappedcoord + indtevtrans%d;\n", n); // Emulate s24 overflows if (DriverDetails::HasBug(DriverDetails::BUG_BROKENIVECSHIFTS)) out.Write("\ttevcoord.xy = irshift(ilshift(tevcoord.xy, 8), 8);\n"); else out.Write("\ttevcoord.xy = (tevcoord.xy << 8) >> 8;\n"); } TevStageCombiner::ColorCombiner &cc = bpmem.combiners[n].colorC; TevStageCombiner::AlphaCombiner &ac = bpmem.combiners[n].alphaC; uid_data->stagehash[n].cc = cc.hex & 0xFFFFFF; uid_data->stagehash[n].ac = ac.hex & 0xFFFFF0; // Storing rswap and tswap later if (cc.a == TEVCOLORARG_RASA || cc.a == TEVCOLORARG_RASC || cc.b == TEVCOLORARG_RASA || cc.b == TEVCOLORARG_RASC || cc.c == TEVCOLORARG_RASA || cc.c == TEVCOLORARG_RASC || cc.d == TEVCOLORARG_RASA || cc.d == TEVCOLORARG_RASC || ac.a == TEVALPHAARG_RASA || ac.b == TEVALPHAARG_RASA || ac.c == TEVALPHAARG_RASA || ac.d == TEVALPHAARG_RASA) { const int i = bpmem.combiners[n].alphaC.rswap; uid_data->stagehash[n].ac |= bpmem.combiners[n].alphaC.rswap; uid_data->stagehash[n].tevksel_swap1a = bpmem.tevksel[i*2].swap1; uid_data->stagehash[n].tevksel_swap2a = bpmem.tevksel[i*2].swap2; uid_data->stagehash[n].tevksel_swap1b = bpmem.tevksel[i*2+1].swap1; uid_data->stagehash[n].tevksel_swap2b = bpmem.tevksel[i*2+1].swap2; uid_data->stagehash[n].tevorders_colorchan = bpmem.tevorders[n / 2].getColorChan(n & 1); const char *rasswap = swapModeTable[bpmem.combiners[n].alphaC.rswap]; out.Write("\trastemp = %s.%s;\n", tevRasTable[bpmem.tevorders[n / 2].getColorChan(n & 1)], rasswap); } uid_data->stagehash[n].tevorders_enable = bpmem.tevorders[n / 2].getEnable(n & 1); if (bpmem.tevorders[n/2].getEnable(n&1)) { int texmap = bpmem.tevorders[n/2].getTexMap(n&1); if (!bHasIndStage) { // calc tevcord if (bHasTexCoord) out.Write("\ttevcoord.xy = fixpoint_uv%d;\n", texcoord); else out.Write("\ttevcoord.xy = int2(0, 0);\n"); } const int i = bpmem.combiners[n].alphaC.tswap; uid_data->stagehash[n].ac |= bpmem.combiners[n].alphaC.tswap << 2; uid_data->stagehash[n].tevksel_swap1c = bpmem.tevksel[i*2].swap1; uid_data->stagehash[n].tevksel_swap2c = bpmem.tevksel[i*2].swap2; uid_data->stagehash[n].tevksel_swap1d = bpmem.tevksel[i*2+1].swap1; uid_data->stagehash[n].tevksel_swap2d = bpmem.tevksel[i*2+1].swap2; uid_data->stagehash[n].tevorders_texmap= bpmem.tevorders[n/2].getTexMap(n&1); const char *texswap = swapModeTable[bpmem.combiners[n].alphaC.tswap]; uid_data->SetTevindrefTexmap(i, texmap); out.Write("\ttextemp = "); SampleTexture(out, "(float2(tevcoord.xy)/128.0)", texswap, texmap, ApiType); } else { out.Write("\ttextemp = int4(255, 255, 255, 255);\n"); } if (cc.a == TEVCOLORARG_KONST || cc.b == TEVCOLORARG_KONST || cc.c == TEVCOLORARG_KONST || cc.d == TEVCOLORARG_KONST || ac.a == TEVALPHAARG_KONST || ac.b == TEVALPHAARG_KONST || ac.c == TEVALPHAARG_KONST || ac.d == TEVALPHAARG_KONST) { int kc = bpmem.tevksel[n / 2].getKC(n & 1); int ka = bpmem.tevksel[n / 2].getKA(n & 1); uid_data->stagehash[n].tevksel_kc = kc; uid_data->stagehash[n].tevksel_ka = ka; out.Write("\tkonsttemp = int4(%s, %s);\n", tevKSelTableC[kc], tevKSelTableA[ka]); if (kc > 7) out.SetConstantsUsed(C_KCOLORS+((kc-0xc)%4),C_KCOLORS+((kc-0xc)%4)); if (ka > 7) out.SetConstantsUsed(C_KCOLORS+((ka-0xc)%4),C_KCOLORS+((ka-0xc)%4)); } if (cc.d == TEVCOLORARG_C0 || cc.d == TEVCOLORARG_A0 || ac.d == TEVALPHAARG_A0) out.SetConstantsUsed(C_COLORS+1,C_COLORS+1); if (cc.d == TEVCOLORARG_C1 || cc.d == TEVCOLORARG_A1 || ac.d == TEVALPHAARG_A1) out.SetConstantsUsed(C_COLORS+2,C_COLORS+2); if (cc.d == TEVCOLORARG_C2 || cc.d == TEVCOLORARG_A2 || ac.d == TEVALPHAARG_A2) out.SetConstantsUsed(C_COLORS+3,C_COLORS+3); if (cc.dest >= GX_TEVREG0 && cc.dest <= GX_TEVREG2) out.SetConstantsUsed(C_COLORS+cc.dest, C_COLORS+cc.dest); if (ac.dest >= GX_TEVREG0 && ac.dest <= GX_TEVREG2) out.SetConstantsUsed(C_COLORS+ac.dest, C_COLORS+ac.dest); out.Write("\ttevin_a = int4(%s, %s)&255;\n", tevCInputTable[cc.a], tevAInputTable[ac.a]); out.Write("\ttevin_b = int4(%s, %s)&255;\n", tevCInputTable[cc.b], tevAInputTable[ac.b]); out.Write("\ttevin_c = int4(%s, %s)&255;\n", tevCInputTable[cc.c], tevAInputTable[ac.c]); out.Write("\ttevin_d = int4(%s, %s);\n", tevCInputTable[cc.d], tevAInputTable[ac.d]); out.Write("\t// color combine\n"); out.Write("\t%s = clamp(", tevCOutputTable[cc.dest]); if (cc.bias != TevBias_COMPARE) { WriteTevRegular(out, "rgb", cc.bias, cc.op, cc.clamp, cc.shift); } else { const char *function_table[] = { "((tevin_a.r > tevin_b.r) ? tevin_c.rgb : int3(0,0,0))", // TEVCMP_R8_GT "((tevin_a.r == tevin_b.r) ? tevin_c.rgb : int3(0,0,0))", // TEVCMP_R8_EQ "((idot(tevin_a.rgb, comp16) > idot(tevin_b.rgb, comp16)) ? tevin_c.rgb : int3(0,0,0))", // TEVCMP_GR16_GT "((idot(tevin_a.rgb, comp16) == idot(tevin_b.rgb, comp16)) ? tevin_c.rgb : int3(0,0,0))", // TEVCMP_GR16_EQ "((idot(tevin_a.rgb, comp24) > idot(tevin_b.rgb, comp24)) ? tevin_c.rgb : int3(0,0,0))", // TEVCMP_BGR24_GT "((idot(tevin_a.rgb, comp24) == idot(tevin_b.rgb, comp24)) ? tevin_c.rgb : int3(0,0,0))", // TEVCMP_BGR24_EQ "(max(sign(tevin_a.rgb - tevin_b.rgb), int3(0,0,0)) * tevin_c.rgb)", // TEVCMP_RGB8_GT "((int3(1,1,1) - sign(abs(tevin_a.rgb - tevin_b.rgb))) * tevin_c.rgb)" // TEVCMP_RGB8_EQ }; int mode = (cc.shift<<1)|cc.op; out.Write(" tevin_d.rgb + "); out.Write(function_table[mode]); } if (cc.clamp) out.Write(", int3(0,0,0), int3(255,255,255))"); else out.Write(", int3(-1024,-1024,-1024), int3(1023,1023,1023))"); out.Write(";\n"); out.Write("\t// alpha combine\n"); out.Write("\t%s = clamp(", tevAOutputTable[ac.dest]); if (ac.bias != TevBias_COMPARE) { WriteTevRegular(out, "a", ac.bias, ac.op, ac.clamp, ac.shift); } else { const char *function_table[] = { "((tevin_a.r > tevin_b.r) ? tevin_c.a : 0)", // TEVCMP_R8_GT "((tevin_a.r == tevin_b.r) ? tevin_c.a : 0)", // TEVCMP_R8_EQ "((idot(tevin_a.rgb, comp16) > idot(tevin_b.rgb, comp16)) ? tevin_c.a : 0)", // TEVCMP_GR16_GT "((idot(tevin_a.rgb, comp16) == idot(tevin_b.rgb, comp16)) ? tevin_c.a : 0)", // TEVCMP_GR16_EQ "((idot(tevin_a.rgb, comp24) > idot(tevin_b.rgb, comp24)) ? tevin_c.a : 0)", // TEVCMP_BGR24_GT "((idot(tevin_a.rgb, comp24) == idot(tevin_b.rgb, comp24)) ? tevin_c.a : 0)", // TEVCMP_BGR24_EQ "((tevin_a.a > tevin_b.a) ? tevin_c.a : 0)", // TEVCMP_A8_GT "((tevin_a.a == tevin_b.a) ? tevin_c.a : 0)" // TEVCMP_A8_EQ }; int mode = (ac.shift<<1)|ac.op; out.Write(" tevin_d.a + "); out.Write(function_table[mode]); } if (ac.clamp) out.Write(", 0, 255)"); else out.Write(", -1024, 1023)"); out.Write(";\n"); } template static inline void WriteTevRegular(T& out, const char* components, int bias, int op, int clamp, int shift) { const char *tevScaleTableLeft[] = { "", // SCALE_1 " << 1", // SCALE_2 " << 2", // SCALE_4 "", // DIVIDE_2 }; const char *tevScaleTableRight[] = { "", // SCALE_1 "", // SCALE_2 "", // SCALE_4 " >> 1", // DIVIDE_2 }; const char *tevLerpBias[] = // indexed by 2*op+(shift==3) { "", " + 128", "", " + 127", }; const char *tevBiasTable[] = { "", // ZERO, " + 128", // ADDHALF, " - 128", // SUBHALF, "", }; const char *tevOpTable[] = { "+", // TEVOP_ADD = 0, "-", // TEVOP_SUB = 1, }; // Regular TEV stage: (d + bias + lerp(a,b,c)) * scale // The GameCube/Wii GPU uses a very sophisticated algorithm for scale-lerping: // - c is scaled from 0..255 to 0..256, which allows dividing the result by 256 instead of 255 // - if scale is bigger than one, it is moved inside the lerp calculation for increased accuracy // - a rounding bias is added before dividing by 256 if (DriverDetails::HasBug(DriverDetails::BUG_BROKENIVECSHIFTS)) { // Haxx - cleaner code by not having irshift and ilshift in the emitted code by omitting them if not used. const char* leftShift = tevScaleTableLeft[shift]; const char* rightShift = tevScaleTableRight[shift]; if (rightShift[0]) out.Write("irshift(((tevin_d.%s%s)%s)", components, tevBiasTable[bias], tevScaleTableLeft[shift]); else out.Write("((tevin_d.%s%s)%s)", components, tevBiasTable[bias], tevScaleTableLeft[shift]); out.Write(" %s ", tevOpTable[op]); if (leftShift[0]) out.Write("irshift((ilshift((ilshift(tevin_a.%s, 8) + (tevin_b.%s-tevin_a.%s)*(tevin_c.%s+irshift(tevin_c.%s, 7))), %s)%s), 8)", components, components, components, components, components, leftShift+4, tevLerpBias[2*op+(shift!=3)]); else out.Write("irshift(((ilshift(tevin_a.%s, 8) + (tevin_b.%s-tevin_a.%s)*(tevin_c.%s+irshift(tevin_c.%s, 7)))%s), 8)", components, components, components, components, components, tevLerpBias[2*op+(shift!=3)]); if (rightShift[0]) out.Write(", %s)", rightShift+4); } else { out.Write("(((tevin_d.%s%s)%s)", components, tevBiasTable[bias], tevScaleTableLeft[shift]); out.Write(" %s ", tevOpTable[op]); out.Write("(((((tevin_a.%s<<8) + (tevin_b.%s-tevin_a.%s)*(tevin_c.%s+(tevin_c.%s>>7)))%s)%s)>>8)", components, components, components, components, components, tevScaleTableLeft[shift], tevLerpBias[2*op+(shift!=3)]); out.Write(")%s", tevScaleTableRight[shift]); } } template static inline void SampleTexture(T& out, const char *texcoords, const char *texswap, int texmap, API_TYPE ApiType) { out.SetConstantsUsed(C_TEXDIMS+texmap,C_TEXDIMS+texmap); if (ApiType == API_D3D) out.Write("iround(255.0 * Tex%d.Sample(samp%d, float3(%s.xy * " I_TEXDIMS"[%d].xy, %s))).%s;\n", texmap, texmap, texcoords, texmap, g_ActiveConfig.iStereoMode > 0 ? "layer" : "0.0", texswap); else out.Write("iround(255.0 * texture(samp%d, float3(%s.xy * " I_TEXDIMS"[%d].xy, %s))).%s;\n", texmap, texcoords, texmap, g_ActiveConfig.iStereoMode > 0 ? "layer" : "0.0", texswap); } static const char *tevAlphaFuncsTable[] = { "(false)", // NEVER "(prev.a < %s)", // LESS "(prev.a == %s)", // EQUAL "(prev.a <= %s)", // LEQUAL "(prev.a > %s)", // GREATER "(prev.a != %s)", // NEQUAL "(prev.a >= %s)", // GEQUAL "(true)" // ALWAYS }; static const char *tevAlphaFunclogicTable[] = { " && ", // and " || ", // or " != ", // xor " == " // xnor }; template static inline void WriteAlphaTest(T& out, pixel_shader_uid_data* uid_data, API_TYPE ApiType, DSTALPHA_MODE dstAlphaMode, bool per_pixel_depth) { static const char *alphaRef[2] = { I_ALPHA".r", I_ALPHA".g" }; out.SetConstantsUsed(C_ALPHA, C_ALPHA); if (DriverDetails::HasBug(DriverDetails::BUG_BROKENNEGATEDBOOLEAN)) out.Write("\tif(( "); else out.Write("\tif(!( "); uid_data->alpha_test_comp0 = bpmem.alpha_test.comp0; uid_data->alpha_test_comp1 = bpmem.alpha_test.comp1; uid_data->alpha_test_logic = bpmem.alpha_test.logic; // Lookup the first component from the alpha function table int compindex = bpmem.alpha_test.comp0; out.Write(tevAlphaFuncsTable[compindex], alphaRef[0]); out.Write("%s", tevAlphaFunclogicTable[bpmem.alpha_test.logic]); // lookup the logic op // Lookup the second component from the alpha function table compindex = bpmem.alpha_test.comp1; out.Write(tevAlphaFuncsTable[compindex], alphaRef[1]); if (DriverDetails::HasBug(DriverDetails::BUG_BROKENNEGATEDBOOLEAN)) out.Write(") == false) {\n"); else out.Write(")) {\n"); out.Write("\t\tocol0 = float4(0.0, 0.0, 0.0, 0.0);\n"); if (dstAlphaMode == DSTALPHA_DUAL_SOURCE_BLEND) out.Write("\t\tocol1 = float4(0.0, 0.0, 0.0, 0.0);\n"); if (per_pixel_depth) out.Write("\t\tdepth = 1.0;\n"); // ZCOMPLOC HACK: // The only way to emulate alpha test + early-z is to force early-z in the shader. // As this isn't available on all drivers and as we can't emulate this feature otherwise, // we are only able to choose which one we want to respect more. // Tests seem to have proven that writing depth even when the alpha test fails is more // important that a reliable alpha test, so we just force the alpha test to always succeed. // At least this seems to be less buggy. uid_data->alpha_test_use_zcomploc_hack = bpmem.UseEarlyDepthTest() && bpmem.zmode.updateenable && !g_ActiveConfig.backend_info.bSupportsEarlyZ && !bpmem.genMode.zfreeze; if (!uid_data->alpha_test_use_zcomploc_hack) { out.Write("\t\tdiscard;\n"); if (ApiType != API_D3D) out.Write("\t\treturn;\n"); } out.Write("\t}\n"); } static const char *tevFogFuncsTable[] = { "", // No Fog "", // ? "", // Linear "", // ? "\tfog = 1.0 - exp2(-8.0 * fog);\n", // exp "\tfog = 1.0 - exp2(-8.0 * fog * fog);\n", // exp2 "\tfog = exp2(-8.0 * (1.0 - fog));\n", // backward exp "\tfog = 1.0 - fog;\n fog = exp2(-8.0 * fog * fog);\n" // backward exp2 }; template static inline void WriteFog(T& out, pixel_shader_uid_data* uid_data) { uid_data->fog_fsel = bpmem.fog.c_proj_fsel.fsel; if (bpmem.fog.c_proj_fsel.fsel == 0) return; // no Fog uid_data->fog_proj = bpmem.fog.c_proj_fsel.proj; out.SetConstantsUsed(C_FOGCOLOR, C_FOGCOLOR); out.SetConstantsUsed(C_FOGI, C_FOGI); out.SetConstantsUsed(C_FOGF, C_FOGF+1); if (bpmem.fog.c_proj_fsel.proj == 0) { // perspective // ze = A/(B - (Zs >> B_SHF) // TODO: Verify that we want to drop lower bits here! (currently taken over from software renderer) // Maybe we want to use "ze = (A << B_SHF)/((B << B_SHF) - Zs)" instead? // That's equivalent, but keeps the lower bits of Zs. out.Write("\tfloat ze = (" I_FOGF"[1].x * 16777216.0) / float(" I_FOGI".y - (zCoord >> " I_FOGI".w));\n"); } else { // orthographic // ze = a*Zs (here, no B_SHF) out.Write("\tfloat ze = " I_FOGF"[1].x * float(zCoord) / 16777216.0;\n"); } // x_adjust = sqrt((x-center)^2 + k^2)/k // ze *= x_adjust // TODO Instead of this theoretical calculation, we should use the // coefficient table given in the fog range BP registers! uid_data->fog_RangeBaseEnabled = bpmem.fogRange.Base.Enabled; if (bpmem.fogRange.Base.Enabled) { out.SetConstantsUsed(C_FOGF, C_FOGF); out.Write("\tfloat x_adjust = (2.0 * (rawpos.x / " I_FOGF"[0].y)) - 1.0 - " I_FOGF"[0].x;\n"); out.Write("\tx_adjust = sqrt(x_adjust * x_adjust + " I_FOGF"[0].z * " I_FOGF"[0].z) / " I_FOGF"[0].z;\n"); out.Write("\tze *= x_adjust;\n"); } out.Write("\tfloat fog = clamp(ze - " I_FOGF"[1].z, 0.0, 1.0);\n"); if (bpmem.fog.c_proj_fsel.fsel > 3) { out.Write("%s", tevFogFuncsTable[bpmem.fog.c_proj_fsel.fsel]); } else { if (bpmem.fog.c_proj_fsel.fsel != 2 && out.GetBuffer() != nullptr) WARN_LOG(VIDEO, "Unknown Fog Type! %08x", bpmem.fog.c_proj_fsel.fsel); } out.Write("\tint ifog = iround(fog * 256.0);\n"); if (DriverDetails::HasBug(DriverDetails::BUG_BROKENIVECSHIFTS)) out.Write("\tprev.rgb = irshift((prev.rgb * (256 - ifog) + " I_FOGCOLOR".rgb * ifog), 8);\n"); else out.Write("\tprev.rgb = (prev.rgb * (256 - ifog) + " I_FOGCOLOR".rgb * ifog) >> 8;\n"); } void GetPixelShaderUid(PixelShaderUid& object, DSTALPHA_MODE dstAlphaMode, API_TYPE ApiType, u32 components) { GeneratePixelShader(object, dstAlphaMode, ApiType, components); } void GeneratePixelShaderCode(PixelShaderCode& object, DSTALPHA_MODE dstAlphaMode, API_TYPE ApiType, u32 components) { GeneratePixelShader(object, dstAlphaMode, ApiType, components); } void GetPixelShaderConstantProfile(PixelShaderConstantProfile& object, DSTALPHA_MODE dstAlphaMode, API_TYPE ApiType, u32 components) { GeneratePixelShader(object, dstAlphaMode, ApiType, components); }