remove shadeSpan16 from shader

src/core/SkShader.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkAtomics.h"
 #include "SkBitmapProcShader.h"
 #include "SkColorShader.h"
@@ skipping 101 matching lines @@
 }
 
 SkShader::Context::~Context() {}
 
 SkShader::Context::ShadeProc SkShader::Context::asAShadeProc(void** ctx) {
     return nullptr;
 }
 
 #include "SkColorPriv.h"
 
-void SkShader::Context::shadeSpan16(int x, int y, uint16_t span16[], int count) {
-    SkASSERT(span16);
-    SkASSERT(count > 0);
-    SkASSERT(this->canCallShadeSpan16());
-
-    // basically, if we get here, the subclass screwed up
-    SkDEBUGFAIL("kHasSpan16 flag is set, but shadeSpan16() not implemented");
-}
-
 #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 SkShader::Context::shadeSpanAlpha(int x, int y, uint8_t alpha[], int count) {
@@ skipping 118 matching lines @@
 }
 
 void SkColorShader::flatten(SkWriteBuffer& buffer) const {
     buffer.writeColor(fColor);
 }
 
 uint32_t SkColorShader::ColorShaderContext::getFlags() const {
     return fFlags;
 }
 
-uint8_t SkColorShader::ColorShaderContext::getSpan16Alpha() const {
-    return SkGetPackedA32(fPMColor);
-}
-
 SkShader::Context* SkColorShader::onCreateContext(const ContextRec& rec, void* storage) const {
     return new (storage) ColorShaderContext(*this, rec);
 }
 
 SkColorShader::ColorShaderContext::ColorShaderContext(const SkColorShader& shader,
                                                       const ContextRec& rec)
     : INHERITED(shader, rec)
 {
     SkColor color = shader.fColor;
     unsigned a = SkAlphaMul(SkColorGetA(color), SkAlpha255To256(rec.fPaint->getAlpha()));
 
     unsigned r = SkColorGetR(color);
     unsigned g = SkColorGetG(color);
     unsigned b = SkColorGetB(color);
 
-    // we want this before we apply any alpha
-    fColor16 = SkPack888ToRGB16(r, g, b);
-
     if (a != 255) {
         r = SkMulDiv255Round(r, a);
         g = SkMulDiv255Round(g, a);
         b = SkMulDiv255Round(b, a);
     }
     fPMColor = SkPackARGB32(a, r, g, b);
 
     fFlags = kConstInY32_Flag;
     if (255 == a) {
         fFlags |= kOpaqueAlpha_Flag;
-        if (rec.fPaint->isDither() == false) {
-            fFlags |= kHasSpan16_Flag;
-        }
     }
 }
 
 void SkColorShader::ColorShaderContext::shadeSpan(int x, int y, SkPMColor span[], int count) {
     sk_memset32(span, fPMColor, count);
 }
 
-void SkColorShader::ColorShaderContext::shadeSpan16(int x, int y, uint16_t span[], int count) {
-    sk_memset16(span, fColor16, count);
-}
-
 void SkColorShader::ColorShaderContext::shadeSpanAlpha(int x, int y, uint8_t alpha[], int count) {
     memset(alpha, SkGetPackedA32(fPMColor), count);
 }
 
 SkShader::GradientType SkColorShader::asAGradient(GradientInfo* info) const {
     if (info) {
         if (info->fColors && info->fColorCount >= 1) {
             info->fColors[0] = fColor;
         }
         info->fColorCount = 1;
@@ skipping 38 matching lines @@
 #include "SkEmptyShader.h"
 
 void SkEmptyShader::toString(SkString* str) const {
     str->append("SkEmptyShader: (");
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif