| // Not exposed in shared module |
| |
| $pure $genIType mix($genIType x, $genIType y, $genBType a); |
| $pure $genBType mix($genBType x, $genBType y, $genBType a); |
| $pure $genType fma($genType a, $genType b, $genType c); |
| $pure $genHType fma($genHType a, $genHType b, $genHType c); |
| $genType frexp($genType x, out $genIType exp); |
| $genHType frexp($genHType x, out $genIType exp); |
| $pure $genType ldexp($genType x, in $genIType exp); |
| $pure $genHType ldexp($genHType x, in $genIType exp); |
| |
| $pure uint packSnorm2x16(float2 v); |
| $pure uint packUnorm4x8(float4 v); |
| $pure uint packSnorm4x8(float4 v); |
| $pure float2 unpackSnorm2x16(uint p); |
| $pure float4 unpackUnorm4x8(uint p); |
| $pure float4 unpackSnorm4x8(uint p); |
| $pure uint packHalf2x16(float2 v); |
| $pure float2 unpackHalf2x16(uint v); |
| |
| $pure $bvec lessThan($svec x, $svec y); |
| $pure $bvec lessThan($usvec x, $usvec y); |
| $pure $bvec lessThan($uvec x, $uvec y); |
| $pure $bvec lessThanEqual($uvec x, $uvec y); |
| $pure $bvec lessThanEqual($svec x, $svec y); |
| $pure $bvec lessThanEqual($usvec x, $usvec y); |
| $pure $bvec greaterThan($uvec x, $uvec y); |
| $pure $bvec greaterThan($svec x, $svec y); |
| $pure $bvec greaterThan($usvec x, $usvec y); |
| $pure $bvec greaterThanEqual($uvec x, $uvec y); |
| $pure $bvec greaterThanEqual($svec x, $svec y); |
| $pure $bvec greaterThanEqual($usvec x, $usvec y); |
| $pure $bvec equal($uvec x, $uvec y); |
| $pure $bvec equal($svec x, $svec y); |
| $pure $bvec equal($usvec x, $usvec y); |
| $pure $bvec notEqual($uvec x, $uvec y); |
| $pure $bvec notEqual($svec x, $svec y); |
| $pure $bvec notEqual($usvec x, $usvec y); |
| |
| $pure $genIType bitCount($genIType value); |
| $pure $genIType bitCount($genUType value); |
| $pure $genIType findLSB($genIType value); |
| $pure $genIType findLSB($genUType value); |
| $pure $genIType findMSB($genIType value); |
| $pure $genIType findMSB($genUType value); |
| |
| $pure sampler2D makeSampler2D(texture2D texture, sampler s); |
| |
| $pure half4 sample(sampler2D s, float2 P); |
| $pure half4 sample(samplerExternalOES s, float2 P, float bias); |
| $pure half4 sample(samplerExternalOES s, float2 P); |
| |
| $pure half4 sample(sampler2DRect s, float2 P); |
| $pure half4 sample(sampler2DRect s, float3 P); |
| |
| // Currently we do not support the generic types of loading subpassInput so we have some explicit |
| // versions that we currently use |
| $pure half4 subpassLoad(subpassInput subpass); |
| $pure half4 subpassLoad(subpassInputMS subpass, int sample); |
| |
| $pure half4 sample(sampler2D s, float3 P); |
| $pure half4 sample(sampler2D s, float3 P, float bias); |
| |
| // Definitions of functions implementing all of the SkBlendMode blends. |
| |
| $pure half4 blend_clear(half4 src, half4 dst) { return half4(0); } |
| |
| $pure half4 blend_src(half4 src, half4 dst) { return src; } |
| |
| $pure half4 blend_dst(half4 src, half4 dst) { return dst; } |
| |
| $pure half4 blend_src_over(half4 src, half4 dst) { return src + (1 - src.a)*dst; } |
| |
| $pure half4 blend_dst_over(half4 src, half4 dst) { return (1 - dst.a)*src + dst; } |
| |
| $pure half4 blend_src_in(half4 src, half4 dst) { return src*dst.a; } |
| |
| $pure half4 blend_dst_in(half4 src, half4 dst) { return dst*src.a; } |
| |
| $pure half4 blend_src_out(half4 src, half4 dst) { return (1 - dst.a)*src; } |
| |
| $pure half4 blend_dst_out(half4 src, half4 dst) { return (1 - src.a)*dst; } |
| |
| $pure half4 blend_src_atop(half4 src, half4 dst) { return dst.a*src + (1 - src.a)*dst; } |
| |
| $pure half4 blend_dst_atop(half4 src, half4 dst) { return (1 - dst.a) * src + src.a*dst; } |
| |
| $pure half4 blend_xor(half4 src, half4 dst) { return (1 - dst.a)*src + (1 - src.a)*dst; } |
| |
| $pure half4 blend_plus(half4 src, half4 dst) { return min(src + dst, 1); } |
| |
| // This multi-purpose Porter-Duff blend function can perform any of the thirteen blends above, |
| // when passed one of the following values for BlendOp: |
| // - Clear: half4(0, 0, 0, 0) |
| // - Src: half4(1, 0, 0, 0) |
| // - Dst: half4(0, 1, 0, 0) |
| // - SrcOver: half4(1, 0, 0, -1) |
| // - DstOver: half4(0, 1, -1, 0) |
| // - SrcIn: half4(0, 0, 1, 0) |
| // - DstIn: half4(0, 0, 0, 1) |
| // - SrcOut: half4(0, 0, -1, 0) |
| // - DstOut: half4(0, 0, 0, -1) |
| // - SrcATop: half4(0, 0, 1, -1) |
| // - DstATop: half4(0, 0, -1, 1) |
| // - Xor: half4(0, 0, -1, -1) |
| // - Plus: half4(1, 1, 0, 0) |
| $pure half4 blend_porter_duff(half4 blendOp, half4 src, half4 dst) { |
| half2 coeff = blendOp.xy + (blendOp.zw * (half2(dst.a, src.a) + min(blendOp.zw, 0))); |
| return min(half4(1), src * coeff.x + dst * coeff.y); |
| } |
| |
| $pure half4 blend_modulate(half4 src, half4 dst) { return src*dst; } |
| |
| $pure half4 blend_screen(half4 src, half4 dst) { return src + (1 - src)*dst; } |
| |
| $pure half $blend_overlay_component(half2 s, half2 d) { |
| return (2*d.x <= d.y) ? 2*s.x*d.x |
| : s.y*d.y - 2*(d.y - d.x)*(s.y - s.x); |
| } |
| |
| $pure half4 blend_overlay(half4 src, half4 dst) { |
| half4 result = half4($blend_overlay_component(src.ra, dst.ra), |
| $blend_overlay_component(src.ga, dst.ga), |
| $blend_overlay_component(src.ba, dst.ba), |
| src.a + (1 - src.a)*dst.a); |
| result.rgb += dst.rgb*(1 - src.a) + src.rgb*(1 - dst.a); |
| return result; |
| } |
| |
| $pure half4 blend_overlay(half flip, half4 a, half4 b) { |
| return blend_overlay(bool(flip) ? b : a, bool(flip) ? a : b); |
| } |
| |
| $pure half4 blend_lighten(half4 src, half4 dst) { |
| half4 result = blend_src_over(src, dst); |
| result.rgb = max(result.rgb, (1 - dst.a)*src.rgb + dst.rgb); |
| return result; |
| } |
| |
| $pure half4 blend_darken(half mode /* darken: 1, lighten: -1 */, half4 src, half4 dst) { |
| half4 a = blend_src_over(src, dst); |
| half3 b = (1 - dst.a) * src.rgb + dst.rgb; // DstOver.rgb |
| a.rgb = mode * min(a.rgb * mode, b.rgb * mode); |
| return a; |
| } |
| |
| $pure half4 blend_darken(half4 src, half4 dst) { |
| return blend_darken(1, src, dst); |
| } |
| |
| const half $kGuardedDivideEpsilon = sk_Caps.mustGuardDivisionEvenAfterExplicitZeroCheck |
| ? 0.00000001 |
| : 0.0; |
| |
| $pure inline half $guarded_divide(half n, half d) { |
| return n / (d + $kGuardedDivideEpsilon); |
| } |
| |
| $pure inline half3 $guarded_divide(half3 n, half d) { |
| return n / (d + $kGuardedDivideEpsilon); |
| } |
| |
| $pure half $color_dodge_component(half2 s, half2 d) { |
| if (d.x == 0) { |
| return s.x*(1 - d.y); |
| } else { |
| half delta = s.y - s.x; |
| if (delta == 0) { |
| return s.y*d.y + s.x*(1 - d.y) + d.x*(1 - s.y); |
| } else { |
| delta = min(d.y, $guarded_divide(d.x*s.y, delta)); |
| return delta*s.y + s.x*(1 - d.y) + d.x*(1 - s.y); |
| } |
| } |
| } |
| |
| $pure half4 blend_color_dodge(half4 src, half4 dst) { |
| return half4($color_dodge_component(src.ra, dst.ra), |
| $color_dodge_component(src.ga, dst.ga), |
| $color_dodge_component(src.ba, dst.ba), |
| src.a + (1 - src.a)*dst.a); |
| } |
| |
| $pure half $color_burn_component(half2 s, half2 d) { |
| if (d.y == d.x) { |
| return s.y*d.y + s.x*(1 - d.y) + d.x*(1 - s.y); |
| } else if (s.x == 0) { |
| return d.x*(1 - s.y); |
| } else { |
| half delta = max(0, d.y - $guarded_divide((d.y - d.x)*s.y, s.x)); |
| return delta*s.y + s.x*(1 - d.y) + d.x*(1 - s.y); |
| } |
| } |
| |
| $pure half4 blend_color_burn(half4 src, half4 dst) { |
| return half4($color_burn_component(src.ra, dst.ra), |
| $color_burn_component(src.ga, dst.ga), |
| $color_burn_component(src.ba, dst.ba), |
| src.a + (1 - src.a)*dst.a); |
| } |
| |
| $pure half4 blend_hard_light(half4 src, half4 dst) { |
| return blend_overlay(dst, src); |
| } |
| |
| $pure half $soft_light_component(half2 s, half2 d) { |
| if (2*s.x <= s.y) { |
| return $guarded_divide(d.x*d.x*(s.y - 2*s.x), d.y) + (1 - d.y)*s.x + d.x*(-s.y + 2*s.x + 1); |
| } else if (4.0 * d.x <= d.y) { |
| half DSqd = d.x*d.x; |
| half DCub = DSqd*d.x; |
| half DaSqd = d.y*d.y; |
| half DaCub = DaSqd*d.y; |
| return $guarded_divide(DaSqd*(s.x - d.x*(3*s.y - 6*s.x - 1)) + 12*d.y*DSqd*(s.y - 2*s.x) |
| - 16*DCub * (s.y - 2*s.x) - DaCub*s.x, DaSqd); |
| } else { |
| return d.x*(s.y - 2*s.x + 1) + s.x - sqrt(d.y*d.x)*(s.y - 2*s.x) - d.y*s.x; |
| } |
| } |
| |
| $pure half4 blend_soft_light(half4 src, half4 dst) { |
| return (dst.a == 0) ? src : half4($soft_light_component(src.ra, dst.ra), |
| $soft_light_component(src.ga, dst.ga), |
| $soft_light_component(src.ba, dst.ba), |
| src.a + (1 - src.a)*dst.a); |
| } |
| |
| $pure half4 blend_difference(half4 src, half4 dst) { |
| return half4(src.rgb + dst.rgb - 2*min(src.rgb*dst.a, dst.rgb*src.a), |
| src.a + (1 - src.a)*dst.a); |
| } |
| |
| $pure half4 blend_exclusion(half4 src, half4 dst) { |
| return half4(dst.rgb + src.rgb - 2*dst.rgb*src.rgb, src.a + (1 - src.a)*dst.a); |
| } |
| |
| $pure half4 blend_multiply(half4 src, half4 dst) { |
| return half4((1 - src.a)*dst.rgb + (1 - dst.a)*src.rgb + src.rgb*dst.rgb, |
| src.a + (1 - src.a)*dst.a); |
| } |
| |
| $pure half $blend_color_luminance(half3 color) { return dot(half3(0.3, 0.59, 0.11), color); } |
| |
| $pure half3 $blend_set_color_luminance(half3 hueSatColor, half alpha, half3 lumColor) { |
| half lum = $blend_color_luminance(lumColor); |
| half3 result = lum - $blend_color_luminance(hueSatColor) + hueSatColor; |
| half minComp = min(min(result.r, result.g), result.b); |
| half maxComp = max(max(result.r, result.g), result.b); |
| if (minComp < 0 && lum != minComp) { |
| result = lum + (result - lum) * $guarded_divide(lum, (lum - minComp)); |
| } |
| if (maxComp > alpha && maxComp != lum) { |
| result = lum + $guarded_divide((result - lum) * (alpha - lum), (maxComp - lum)); |
| } |
| return result; |
| } |
| |
| $pure half $blend_color_saturation(half3 color) { |
| return max(max(color.r, color.g), color.b) - min(min(color.r, color.g), color.b); |
| } |
| |
| $pure half3 $blend_set_color_saturation(half3 color, half3 satColor) { |
| half mn = min(min(color.r, color.g), color.b); |
| half mx = max(max(color.r, color.g), color.b); |
| |
| return (mx > mn) ? ((color - mn) * $blend_color_saturation(satColor)) / (mx - mn) |
| : half3(0); |
| } |
| |
| $pure half4 blend_hslc(half2 flipSat, half4 src, half4 dst) { |
| half alpha = dst.a * src.a; |
| half3 sda = src.rgb * dst.a; |
| half3 dsa = dst.rgb * src.a; |
| half3 l = bool(flipSat.x) ? dsa : sda; |
| half3 r = bool(flipSat.x) ? sda : dsa; |
| if (bool(flipSat.y)) { |
| l = $blend_set_color_saturation(l, r); |
| r = dsa; |
| } |
| return half4($blend_set_color_luminance(l, alpha, r) + dst.rgb - dsa + src.rgb - sda, |
| src.a + dst.a - alpha); |
| } |
| |
| $pure half4 blend_hue(half4 src, half4 dst) { |
| return blend_hslc(half2(0, 1), src, dst); |
| } |
| |
| $pure half4 blend_saturation(half4 src, half4 dst) { |
| return blend_hslc(half2(1), src, dst); |
| } |
| |
| $pure half4 blend_color(half4 src, half4 dst) { |
| return blend_hslc(half2(0), src, dst); |
| } |
| |
| $pure half4 blend_luminosity(half4 src, half4 dst) { |
| return blend_hslc(half2(1, 0), src, dst); |
| } |
| |
| $pure float2 proj(float3 p) { return p.xy / p.z; } |
| |
| // Implement cross() as a determinant to communicate our intent more clearly to the compiler. |
| // NOTE: Due to precision issues, it might be the case that cross(a, a) != 0. |
| $pure float cross_length_2d(float2 a, float2 b) { |
| return determinant(float2x2(a, b)); |
| } |
| |
| $pure half cross_length_2d(half2 a, half2 b) { |
| return determinant(half2x2(a, b)); |
| } |