remove filterSpan from SkColorFilter

Bug: skia:
Change-Id: Ie8a31ea8131c08d251a825622484342e3e174474
Reviewed-on: https://skia-review.googlesource.com/21207
Commit-Queue: Mike Reed <reed@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
Reviewed-by: Mike Klein <mtklein@chromium.org>
Reviewed-by: Florin Malita <fmalita@chromium.org>

1 files changed, 0 insertions, 75 deletions

diff --git a/src/core/SkColorMatrixFilterRowMajor255.cpp b/src/core/SkColorMatrixFilterRowMajor255.cpp
index aa11746d0a..f08a7f5698 100644
--- a/src/core/SkColorMatrixFilterRowMajor255.cpp
+++ b/src/core/SkColorMatrixFilterRowMajor255.cpp
@@ -62,81 +62,6 @@ uint32_t SkColorMatrixFilterRowMajor255::getFlags() const {
     return this->INHERITED::getFlags() | fFlags;
 }
 
-static Sk4f scale_rgb(float scale) {
-    static_assert(SkPM4f::A == 3, "Alpha is lane 3");
-    return Sk4f(scale, scale, scale, 1);
-}
-
-static Sk4f premul(const Sk4f& x) {
-    return x * scale_rgb(x[SkPM4f::A]);
-}
-
-static Sk4f unpremul(const Sk4f& x) {
-    return x * scale_rgb(1 / x[SkPM4f::A]);  // TODO: fast/approx invert?
-}
-
-static Sk4f clamp_0_1(const Sk4f& x) {
-    return Sk4f::Max(Sk4f::Min(x, Sk4f(1)), Sk4f(0));
-}
-
-static SkPMColor round(const Sk4f& x) {
-    SkPMColor c;
-    SkNx_cast<uint8_t>(x * Sk4f(255) + Sk4f(0.5f)).store(&c);
-    return c;
-}
-
-template <typename Adaptor, typename T>
-void filter_span(const float array[], const T src[], int count, T dst[]) {
-    const Sk4f c0 = Sk4f::Load(array + 0);
-    const Sk4f c1 = Sk4f::Load(array + 4);
-    const Sk4f c2 = Sk4f::Load(array + 8);
-    const Sk4f c3 = Sk4f::Load(array + 12);
-    const Sk4f c4 = Sk4f::Load(array + 16);
-
-    // todo: we could cache this in the constructor...
-    T matrix_translate_pmcolor = Adaptor::From4f(premul(clamp_0_1(c4)));
-
-    for (int i = 0; i < count; i++) {
-        Sk4f srcf = Adaptor::To4f(src[i]);
-        float srcA = srcf[SkPM4f::A];
-
-        if (0 == srcA) {
-            dst[i] = matrix_translate_pmcolor;
-            continue;
-        }
-        if (1 != srcA) {
-            srcf = unpremul(srcf);
-        }
-
-        Sk4f r4 = srcf[Adaptor::R];
-        Sk4f g4 = srcf[Adaptor::G];
-        Sk4f b4 = srcf[Adaptor::B];
-        Sk4f a4 = srcf[Adaptor::A];
-        // apply matrix
-        Sk4f dst4 = c0 * r4 + c1 * g4 + c2 * b4 + c3 * a4 + c4;
-
-        dst[i] = Adaptor::From4f(premul(clamp_0_1(dst4)));
-    }
-}
-
-struct SkPMColorAdaptor {
-    enum {
-        R = SK_R_INDEX,
-        G = SK_G_INDEX,
-        B = SK_B_INDEX,
-        A = SK_A_INDEX,
-    };
-    static SkPMColor From4f(const Sk4f& c4) {
-        return round(swizzle_rb_if_bgra(c4));
-    }
-    static Sk4f To4f(SkPMColor c) {
-        return Sk4f_fromL32(c);
-    }
-};
-void SkColorMatrixFilterRowMajor255::filterSpan(const SkPMColor src[], int count, SkPMColor dst[]) const {
-    filter_span<SkPMColorAdaptor>(fTranspose, src, count, dst);
-}
-
 ///////////////////////////////////////////////////////////////////////////////
 
 void SkColorMatrixFilterRowMajor255::flatten(SkWriteBuffer& buffer) const {