Line data    Source code

       1             : /*
       2             :  * Copyright 2011 Google Inc.
       3             :  *
       4             :  * Use of this source code is governed by a BSD-style license that can be
       5             :  * found in the LICENSE file.
       6             :  */
       7             : 
       8             : #include "SkMathPriv.h"
       9             : 
      10             : #define SCALE_FILTER_NAME       MAKENAME(_filter_DX_shaderproc)
      11             : 
      12             : // Can't be static in the general case because some of these implementations
      13             : // will be defined and referenced in different object files.
      14             : void SCALE_FILTER_NAME(const void* sIn, int x, int y, SkPMColor* SK_RESTRICT colors, int count);
      15             : 
      16           0 : void SCALE_FILTER_NAME(const void* sIn, int x, int y, SkPMColor* SK_RESTRICT colors, int count) {
      17           0 :     const SkBitmapProcState& s = *static_cast<const SkBitmapProcState*>(sIn);
      18           0 :     SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask |
      19             :                              SkMatrix::kScale_Mask)) == 0);
      20           0 :     SkASSERT(s.fInvKy == 0);
      21           0 :     SkASSERT(count > 0 && colors != nullptr);
      22           0 :     SkASSERT(s.fFilterQuality != kNone_SkFilterQuality);
      23           0 :     SkDEBUGCODE(CHECKSTATE(s);)
      24             : 
      25           0 :     const unsigned maxX = s.fPixmap.width() - 1;
      26           0 :     const SkFixed oneX = s.fFilterOneX;
      27           0 :     const SkFixed dx = s.fInvSx;
      28             :     SkFixed fx;
      29             :     const SRCTYPE* SK_RESTRICT row0;
      30             :     const SRCTYPE* SK_RESTRICT row1;
      31             :     unsigned subY;
      32             : 
      33             :     {
      34           0 :         const SkBitmapProcStateAutoMapper mapper(s, x, y);
      35           0 :         SkFixed fy = mapper.fixedY();
      36           0 :         const unsigned maxY = s.fPixmap.height() - 1;
      37             :         // compute our two Y values up front
      38           0 :         subY = EXTRACT_LOW_BITS(fy, maxY);
      39           0 :         int y0 = TILEY_PROCF(fy, maxY);
      40           0 :         int y1 = TILEY_PROCF((fy + s.fFilterOneY), maxY);
      41             : 
      42           0 :         const char* SK_RESTRICT srcAddr = (const char*)s.fPixmap.addr();
      43           0 :         size_t rb = s.fPixmap.rowBytes();
      44           0 :         row0 = (const SRCTYPE*)(srcAddr + y0 * rb);
      45           0 :         row1 = (const SRCTYPE*)(srcAddr + y1 * rb);
      46             :         // now initialize fx
      47           0 :         fx = mapper.fixedX();
      48             :     }
      49             : 
      50             : #ifdef PREAMBLE
      51           0 :     PREAMBLE(s);
      52             : #endif
      53             : 
      54           0 :     do {
      55           0 :         unsigned subX = EXTRACT_LOW_BITS(fx, maxX);
      56           0 :         unsigned x0 = TILEX_PROCF(fx, maxX);
      57           0 :         unsigned x1 = TILEX_PROCF((fx + oneX), maxX);
      58             : 
      59           0 :         FILTER_PROC(subX, subY,
      60             :                     SRC_TO_FILTER(row0[x0]),
      61             :                     SRC_TO_FILTER(row0[x1]),
      62             :                     SRC_TO_FILTER(row1[x0]),
      63             :                     SRC_TO_FILTER(row1[x1]),
      64           0 :                     colors);
      65           0 :         colors += 1;
      66             : 
      67           0 :         fx += dx;
      68             :     } while (--count != 0);
      69             : 
      70             : #ifdef POSTAMBLE
      71             :     POSTAMBLE(s);
      72             : #endif
      73           0 : }
      74             : 
      75             : ///////////////////////////////////////////////////////////////////////////////
      76             : 
      77             : #undef TILEX_PROCF
      78             : #undef TILEY_PROCF
      79             : #undef EXTRACT_LOW_BITS
      80             : #undef MAKENAME
      81             : #undef SRCTYPE
      82             : #undef CHECKSTATE
      83             : #undef SRC_TO_FILTER
      84             : #undef FILTER_TO_DST
      85             : #undef PREAMBLE
      86             : #undef POSTAMBLE
      87             : 
      88             : #undef SCALE_FILTER_NAME