% Note that, except for effects, default values do not affect the execution. % The default values are intended to be obtained using reflection. [pixel shader] float2 a = {1, 2}; float4x2 b = {1, 2, 3, 4, 5, 6, 7, 8}; float4 main() : sv_target { return float4(a, b[2]); } [test] if(sm<4) uniform 0 float4 10 30 50 70 if(sm<4) uniform 4 float4 20 40 60 80 if(sm<4) uniform 8 float4 10 20 0 0 if(sm>=4) uniform 0 float4 10 20 0 0 if(sm>=4) uniform 4 float4 10 30 50 70 if(sm>=4) uniform 8 float4 20 40 60 80 draw quad probe (0, 0) rgba (10, 20, 50, 60) [pixel shader fail(sm<6)] float a = 7; float4 b = a; // initial value must be a literal expression. float4 main() : sv_target { return 0; } [pixel shader fail(sm<6)] float a = 7; float4 b = {1, 2, a, 4}; // initial value must be a literal expression. float4 main() : sv_target { return 0; } [pixel shader fail] Texture2D tex; struct { Texture2D t; float a; } apple = {tex, 4}; // initial value must be a literal expression. float4 main() : sv_target { return 0; } [pixel shader] static const float a = 7; float4 b = {1, 2, a, 4}; // static constant values are allowed on the initializer. float4 main() : sv_target { return b; } [test] uniform 0 float4 10.0 20.0 30.0 40.0 draw quad probe (0, 0) rgba (10, 20, 30, 40) [pixel shader] float4 a = {3, 5, float2(4, 4)}; // numeric type initializers are allowed. float4 main() : sv_target { return 2 * a; } [test] uniform 0 float4 10.0 20.0 30.0 40.0 todo(msl) draw quad probe (0, 0) rgba (20, 40, 60, 80) [pixel shader] int4 a[2] = {10, 20, float3x2(1, 2, 3, 4, 5, 6)}; // matrix numeric type initializers are allowed. float4 main() : sv_target { return 2 * a[1]; } [test] if(sm<4) uniform 0 float4 10 20 30 40 if(sm<4) uniform 4 float4 50 60 70 80 if(sm>=4) uniform 0 int4 10 20 30 40 if(sm>=4) uniform 4 int4 50 60 70 80 todo(msl) draw quad probe (0, 0) rgba (100, 120, 140, 160) [pixel shader] struct apple { float3 a[2]; int2x2 b; } ap = {1, 2, 3, 4, 5, 6, 7.5, 8, 9, 10}; float4 main() : sv_target { return float4(ap.b); } [test] uniform 0 float4 10 20 30 0 uniform 4 float4 40 50 60 0 if(sm<4) uniform 8 float4 70 90 0 0 if(sm<4) uniform 12 float4 80 100 0 0 if(sm>=4) uniform 8 int4 70 90 0 0 if(sm>=4) uniform 12 int4 80 100 0 0 todo(msl) draw quad probe (0, 0) rgba (70, 80, 90, 100) [pixel shader] cbuffer buff { float2 a = {1, 2}; float4x2 b = {1, 2, 3, 4, 5, 6, 7, 8}; } float4 main() : sv_target { return float4(a, b[2]); } [test] if(sm<4) uniform 0 float4 10 30 50 70 if(sm<4) uniform 4 float4 20 40 60 80 if(sm<4) uniform 8 float4 10 20 0 0 if(sm>=4) uniform 0 float4 10 20 0 0 if(sm>=4) uniform 4 float4 10 30 50 70 if(sm>=4) uniform 8 float4 20 40 60 80 draw quad probe (0, 0) rgba (10, 20, 50, 60) [pixel shader fail(sm<6)] cbuffer buff { float a = 7; float4 b = a; // initial value must be a literal expression. } float4 main() : sv_target { return 0; } [pixel shader fail(sm<6)] cbuffer buff { float a = 7; float4 b = {1, 2, a, 4}; // initial value must be a literal expression. } float4 main() : sv_target { return 0; } [pixel shader] static const float a = 7; cbuffer buff { float4 b = {1, 2, a, 4}; // static constant values are allowed on the initializer. } float4 main() : sv_target { return b; } [test] uniform 0 float4 10 20 30 40 draw quad probe (0, 0) rgba (10, 20, 30, 40) [pixel shader] cbuffer buff { float2 a = {1, 2}; float4 b = {3, 5, float2(4, 4)}; // numeric type initializers are allowed. } float4 main() : sv_target { return 2 * b; } [test] if(sm<4) uniform 0 float4 30 50 40 40 if(sm>=4) uniform 0 float4 10 20 0 0 if(sm>=4) uniform 4 float4 30 50 40 40 todo(msl) draw quad probe (0, 0) rgba (60, 100, 80, 80) [pixel shader] cbuffer buff { struct apple { float3 a[2]; int2x2 b; } ap = {1, 2, 3, 4, 5, 6, 7.5, 8, 9, 10}; } float4 main() : sv_target { return float4(ap.b); } [test] uniform 0 float4 10 20 30 0 uniform 4 float4 40 50 60 0 if(sm<4) uniform 8 float4 70 90 0 0 if(sm<4) uniform 12 float4 80 100 0 0 if(sm>=4) uniform 8 int4 70 90 0 0 if(sm>=4) uniform 12 int4 80 100 0 0 todo(msl) draw quad probe (0, 0) rgba (70, 80, 90, 100) % In SM4, the values in the default values initializer of matrices end up in different components % than for regular initializers. The values are assigned to the matrix components in Chinese % reading order, i.e. the components of a whole column are assigned before the next column, unlike % regular initializers where the components of each row are assigned before the next row. [pixel shader] int2x3 m = {1, 2, 3, 4, 5, 6}; // int2x3 m; // Offset: 0 Size: 40 // = 0x00000001 0x00000002 0x00000000 0x00000000 // 0x00000003 0x00000004 0x00000000 0x00000000 // 0x00000005 0x00000006 float4 main() : sv_target { return m[0][0]; } % The same happens for numeric constructors. [pixel shader] int2x3 m = int2x3(1, 2, 3, 4, 5, 6); // int2x3 m; // Offset: 0 Size: 40 // = 0x00000001 0x00000002 0x00000000 0x00000000 // 0x00000003 0x00000004 0x00000000 0x00000000 // 0x00000005 0x00000006 float4 main() : sv_target { return m[0][0]; } [pixel shader] cbuffer buff { row_major int2x3 m = {1, 2, 3, 4, 5, 6}; // row_major int2x3 m; // Offset: 0 Size: 28 // = 0x00000001 0x00000003 0x00000005 0x00000000 // 0x00000002 0x00000004 0x00000006 } float4 main() : sv_target { return m[0][0]; } [pixel shader fail(sm>=6)] struct { float2 a[2]; row_major int2x3 b; float3 c[2]; } apple = {100, 101, 110, 111, 1, 2, 3, 4, 5, 6, 200, 201, 202, 210, 211, 212}; // struct // { // // float2 a[2]; // Offset: 0 // row_major int2x3 b; // Offset: 32 // float3 c[2]; // Offset: 64 // // } apple; // Offset: 0 Size: 92 // = 0x42c80000 0x42ca0000 0x00000000 0x00000000 // 0x42dc0000 0x42de0000 0x00000000 0x00000000 // 0x00000001 0x00000003 0x00000005 0x00000000 // 0x00000002 0x00000004 0x00000006 0x00000000 // 0x43480000 0x43490000 0x434a0000 0x00000000 // 0x43520000 0x43530000 0x43540000 float4 main() : sv_target { return float4(apple.c[0], 0); } % This compiles but default values for 'p' aren't written to the output binary. [pixel shader fail(sm>=6)] float4 fun() { return 0; }; float2 p = {5, CompileShader(ps_2_0, fun())}; float4 main() : sv_target { return p.xyxy; } [require] shader model >= 5.0 % Default values for doubles don't seem to be saved properly. [pixel shader todo] double2 m = {1, 2}; // double2 m; // Offset: 0 Size: 16 // = 0x00000000 0x00000000 0x40000000 0x00000000 float4 main() : sv_target { return m.y; } [pixel shader] static const float3x2 mat = {10, 20, 30, 40, 50, 60}; static const float4 array[2] = {1, 2, 3, 4, 5, 6, 7, 8}; static const int idx = 1; float3 u = {array[idx].xwwz.xy, mat._m21_m01.x}; // = {5, 8, 60} float4 main() : sv_target { return u.y; } [pixel shader fail] float a = 1; int a = 2; float4 main() : sv_target { return 0; }