Fix UB function problems for shaders and mask.

src/core/SkBitmapProcState.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapCache.h"
 #include "SkBitmapController.h"
 #include "SkBitmapProcState.h"
 #include "SkColorPriv.h"
 #include "SkFilterProc.h"
 #include "SkPaint.h"
 #include "SkShader.h"   // for tilemodes
 #include "SkUtilsArm.h"
 #include "SkBitmapScaler.h"
 #include "SkMipMap.h"
 #include "SkPixelRef.h"
 #include "SkImageEncoder.h"
 #include "SkResourceCache.h"
 
 #if !SK_ARM_NEON_IS_NONE
 // These are defined in src/opts/SkBitmapProcState_arm_neon.cpp
 extern const SkBitmapProcState::SampleProc16 gSkBitmapProcStateSample16_neon[];
 extern const SkBitmapProcState::SampleProc32 gSkBitmapProcStateSample32_neon[];
 extern void  S16_D16_filter_DX_neon(const SkBitmapProcState&, const uint32_t*, int, uint16_t*);
-extern void  Clamp_S16_D16_filter_DX_shaderproc_neon(const SkBitmapProcState&, int, int, uint16_t*, int);
-extern void  Repeat_S16_D16_filter_DX_shaderproc_neon(const SkBitmapProcState&, int, int, uint16_t*, int);
+extern void  Clamp_S16_D16_filter_DX_shaderproc_neon(const void *, int, int, uint16_t*, int);
+extern void  Repeat_S16_D16_filter_DX_shaderproc_neon(const void *, int, int, uint16_t*, int);
 extern void  SI8_opaque_D32_filter_DX_neon(const SkBitmapProcState&, const uint32_t*, int, SkPMColor*);
-extern void  SI8_opaque_D32_filter_DX_shaderproc_neon(const SkBitmapProcState&, int, int, uint32_t*, int);
-extern void  Clamp_SI8_opaque_D32_filter_DX_shaderproc_neon(const SkBitmapProcState&, int, int, uint32_t*, int);
+extern void  SI8_opaque_D32_filter_DX_shaderproc_neon(const void *, int, int, uint32_t*, int);
+extern void  Clamp_SI8_opaque_D32_filter_DX_shaderproc_neon(const void*, int, int, uint32_t*, int);
 #endif
 
-extern void Clamp_S32_opaque_D32_nofilter_DX_shaderproc(const SkBitmapProcState&, int, int, uint32_t*, int);
+extern void Clamp_S32_opaque_D32_nofilter_DX_shaderproc(const void*, int, int, uint32_t*, int);
 
 #define   NAME_WRAP(x)  x
 #include "SkBitmapProcState_filter.h"
 #include "SkBitmapProcState_procs.h"
 
 SkBitmapProcState::SkBitmapProcState(const SkBitmapProvider& provider,
                                      SkShader::TileMode tmx, SkShader::TileMode tmy)
     : fProvider(provider)
     , fBMState(nullptr)
 {
@@ skipping 339 matching lines @@
             fShaderProc32 = this->chooseShaderProc32();
         }
     }
 
     // see if our platform has any accelerated overrides
     this->platformProcs();
 
     return true;
 }
 
-static void Clamp_S32_D32_nofilter_trans_shaderproc(const SkBitmapProcState& s,
+static void Clamp_S32_D32_nofilter_trans_shaderproc(const void* sIn,
                                                     int x, int y,
                                                     SkPMColor* SK_RESTRICT colors,
                                                     int count) {
+    const SkBitmapProcState& s = *static_cast<const SkBitmapProcState*>(sIn);
     SkASSERT(((s.fInvType & ~SkMatrix::kTranslate_Mask)) == 0);
     SkASSERT(s.fInvKy == 0);
     SkASSERT(count > 0 && colors != nullptr);
     SkASSERT(kNone_SkFilterQuality == s.fFilterLevel);
 
     const int maxX = s.fPixmap.width() - 1;
     const int maxY = s.fPixmap.height() - 1;
     int ix = s.fFilterOneX + x;
     int iy = SkClampMax(s.fFilterOneY + y, maxY);
 #ifdef SK_DEBUG
@@ skipping 50 matching lines @@
 }
 
 static inline int sk_int_mirror(int x, int n) {
     x = sk_int_mod(x, 2 * n);
     if (x >= n) {
         x = n + ~(x - n);
     }
     return x;
 }
 
-static void Repeat_S32_D32_nofilter_trans_shaderproc(const SkBitmapProcState& s,
+static void Repeat_S32_D32_nofilter_trans_shaderproc(const void* sIn,
                                                      int x, int y,
                                                      SkPMColor* SK_RESTRICT colors,
                                                      int count) {
+    const SkBitmapProcState& s = *static_cast<const SkBitmapProcState*>(sIn);
     SkASSERT(((s.fInvType & ~SkMatrix::kTranslate_Mask)) == 0);
     SkASSERT(s.fInvKy == 0);
     SkASSERT(count > 0 && colors != nullptr);
     SkASSERT(kNone_SkFilterQuality == s.fFilterLevel);
 
     const int stopX = s.fPixmap.width();
     const int stopY = s.fPixmap.height();
     int ix = s.fFilterOneX + x;
     int iy = sk_int_mod(s.fFilterOneY + y, stopY);
 #ifdef SK_DEBUG
@@ skipping 16 matching lines @@
         memcpy(colors, row + ix, n * sizeof(SkPMColor));
         count -= n;
         if (0 == count) {
             return;
         }
         colors += n;
         ix = 0;
     }
 }
 
-static void S32_D32_constX_shaderproc(const SkBitmapProcState& s,
+static void S32_D32_constX_shaderproc(const void* sIn,
                                       int x, int y,
                                       SkPMColor* SK_RESTRICT colors,
                                       int count) {
+    const SkBitmapProcState& s = *static_cast<const SkBitmapProcState*>(sIn);
     SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask)) == 0);
     SkASSERT(s.fInvKy == 0);
     SkASSERT(count > 0 && colors != nullptr);
     SkASSERT(1 == s.fPixmap.width());
 
     int iY0;
     int iY1   SK_INIT_TO_AVOID_WARNING;
     int iSubY SK_INIT_TO_AVOID_WARNING;
 
     if (kNone_SkFilterQuality != s.fFilterLevel) {
@@ skipping 89 matching lines @@
         if (s.fAlphaScale < 256) {
             color = SkAlphaMulQ(*row0, s.fAlphaScale);
         } else {
             color = *row0;
         }
     }
 
     sk_memset32(colors, color, count);
 }
 
-static void DoNothing_shaderproc(const SkBitmapProcState&, int x, int y,
+static void DoNothing_shaderproc(const void*, int x, int y,
                                  SkPMColor* SK_RESTRICT colors, int count) {
     // if we get called, the matrix is too tricky, so we just draw nothing
     sk_memset32(colors, 0, count);
 }
 
 bool SkBitmapProcState::setupForTranslate() {
     SkPoint pt;
     fInvProc(fInvMatrix, SK_ScalarHalf, SK_ScalarHalf, &pt);
 
     /*
@@ skipping 172 matching lines @@
 
     if (fFilterLevel != kNone_SkFilterQuality) {
         size >>= 1;
     }
 
     return size;
 }
 
 ///////////////////////
 
-void  Clamp_S32_opaque_D32_nofilter_DX_shaderproc(const SkBitmapProcState& s, int x, int y,
+void  Clamp_S32_opaque_D32_nofilter_DX_shaderproc(const void* sIn, int x, int y,
                                                   SkPMColor* SK_RESTRICT dst, int count) {
+    const SkBitmapProcState& s = *static_cast<const SkBitmapProcState*>(sIn);
     SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask |
                              SkMatrix::kScale_Mask)) == 0);
 
     const unsigned maxX = s.fPixmap.width() - 1;
     SkFractionalInt fx;
     int dstY;
     {
         const SkBitmapProcStateAutoMapper mapper(s, x, y);
         const unsigned maxY = s.fPixmap.height() - 1;
         dstY = SkClampMax(SkFixedFloorToInt(mapper.y()), maxY);
@@ skipping 26 matching lines @@
             *dst++ = src[index];
             fx += dx;
         }
     } else {
         for (int i = 0; i < count; ++i) {
             dst[i] = src[SkClampMax(SkFractionalIntToInt(fx), maxX)];
             fx += dx;
         }
     }
 }