remove unused shadeSpanAlpha -- handled by rasterpipeline

Bug: skia:
Change-Id: If13510cbc340b920342d7d4df9ce34ef1081e434
Reviewed-on: https://skia-review.googlesource.com/31420
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Mike Reed <reed@google.com>

4 files changed, 0 insertions, 84 deletions

diff --git a/src/shaders/SkColorShader.cpp b/src/shaders/SkColorShader.cpp
index b57dc9bc35..e718cb0fbf 100644
--- a/src/shaders/SkColorShader.cpp
+++ b/src/shaders/SkColorShader.cpp
@@ -68,10 +68,6 @@ void SkColorShader::ColorShaderContext::shadeSpan(int x, int y, SkPMColor span[]
     sk_memset32(span, fPMColor, count);
 }
 
-void SkColorShader::ColorShaderContext::shadeSpanAlpha(int x, int y, uint8_t alpha[], int count) {
-    memset(alpha, SkGetPackedA32(fPMColor), count);
-}
-
 void SkColorShader::ColorShaderContext::shadeSpan4f(int x, int y, SkPM4f span[], int count) {
     for (int i = 0; i < count; ++i) {
         span[i] = fPM4f;
@@ -187,10 +183,6 @@ void SkColor4Shader::Color4Context::shadeSpan(int x, int y, SkPMColor span[], in
     sk_memset32(span, fPMColor, count);
 }
 
-void SkColor4Shader::Color4Context::shadeSpanAlpha(int x, int y, uint8_t alpha[], int count) {
-    memset(alpha, SkGetPackedA32(fPMColor), count);
-}
-
 void SkColor4Shader::Color4Context::shadeSpan4f(int x, int y, SkPM4f span[], int count) {
     for (int i = 0; i < count; ++i) {
         span[i] = fPM4f;
diff --git a/src/shaders/SkColorShader.h b/src/shaders/SkColorShader.h
index 969064946e..f1bd4784f2 100644
--- a/src/shaders/SkColorShader.h
+++ b/src/shaders/SkColorShader.h
@@ -34,7 +34,6 @@ public:
 
         uint32_t getFlags() const override;
         void shadeSpan(int x, int y, SkPMColor span[], int count) override;
-        void shadeSpanAlpha(int x, int y, uint8_t alpha[], int count) override;
         void shadeSpan4f(int x, int y, SkPM4f[], int count) override;
 
     private:
@@ -92,7 +91,6 @@ public:
 
         uint32_t getFlags() const override;
         void shadeSpan(int x, int y, SkPMColor span[], int count) override;
-        void shadeSpanAlpha(int x, int y, uint8_t alpha[], int count) override;
         void shadeSpan4f(int x, int y, SkPM4f[], int count) override;
 
     private:
diff --git a/src/shaders/SkShader.cpp b/src/shaders/SkShader.cpp
index 4e5f421f2a..6c10ff200c 100644
--- a/src/shaders/SkShader.cpp
+++ b/src/shaders/SkShader.cpp
@@ -150,73 +150,6 @@ void SkShaderBase::Context::shadeSpan4f(int x, int y, SkPM4f dst[], int count) {
     }
 }
 
-#include "SkColorPriv.h"
-
-#define kTempColorQuadCount 6   // balance between speed (larger) and saving stack-space
-#define kTempColorCount     (kTempColorQuadCount << 2)
-
-#ifdef SK_CPU_BENDIAN
-    #define SkU32BitShiftToByteOffset(shift)    (3 - ((shift) >> 3))
-#else
-    #define SkU32BitShiftToByteOffset(shift)    ((shift) >> 3)
-#endif
-
-void SkShaderBase::Context::shadeSpanAlpha(int x, int y, uint8_t alpha[], int count) {
-    SkASSERT(count > 0);
-
-    SkPMColor   colors[kTempColorCount];
-
-    while ((count -= kTempColorCount) >= 0) {
-        this->shadeSpan(x, y, colors, kTempColorCount);
-        x += kTempColorCount;
-
-        const uint8_t* srcA = (const uint8_t*)colors + SkU32BitShiftToByteOffset(SK_A32_SHIFT);
-        int quads = kTempColorQuadCount;
-        do {
-            U8CPU a0 = srcA[0];
-            U8CPU a1 = srcA[4];
-            U8CPU a2 = srcA[8];
-            U8CPU a3 = srcA[12];
-            srcA += 4*4;
-            *alpha++ = SkToU8(a0);
-            *alpha++ = SkToU8(a1);
-            *alpha++ = SkToU8(a2);
-            *alpha++ = SkToU8(a3);
-        } while (--quads != 0);
-    }
-    SkASSERT(count < 0);
-    SkASSERT(count + kTempColorCount >= 0);
-    if (count += kTempColorCount) {
-        this->shadeSpan(x, y, colors, count);
-
-        const uint8_t* srcA = (const uint8_t*)colors + SkU32BitShiftToByteOffset(SK_A32_SHIFT);
-        do {
-            *alpha++ = *srcA;
-            srcA += 4;
-        } while (--count != 0);
-    }
-#if 0
-    do {
-        int n = count;
-        if (n > kTempColorCount)
-            n = kTempColorCount;
-        SkASSERT(n > 0);
-
-        this->shadeSpan(x, y, colors, n);
-        x += n;
-        count -= n;
-
-        const uint8_t* srcA = (const uint8_t*)colors + SkU32BitShiftToByteOffset(SK_A32_SHIFT);
-        do {
-            *alpha++ = *srcA;
-            srcA += 4;
-        } while (--n != 0);
-    } while (count > 0);
-#endif
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
 const SkMatrix& SkShader::getLocalMatrix() const {
     return as_SB(this)->getLocalMatrix();
 }
diff --git a/src/shaders/SkShaderBase.h b/src/shaders/SkShaderBase.h
index f43790a9ce..9356553c09 100644
--- a/src/shaders/SkShaderBase.h
+++ b/src/shaders/SkShaderBase.h
@@ -105,13 +105,6 @@ public:
         typedef void (*ShadeProc)(const void* ctx, int x, int y, SkPMColor[], int count);
         virtual ShadeProc asAShadeProc(void** ctx);
 
-        /**
-         *  Similar to shadeSpan, but only returns the alpha-channel for a span.
-         *  The default implementation calls shadeSpan() and then extracts the alpha
-         *  values from the returned colors.
-         */
-        virtual void shadeSpanAlpha(int x, int y, uint8_t alpha[], int count);
-
         // Notification from blitter::blitMask in case we need to see the non-alpha channels
         virtual void set3DMask(const SkMask*) {}