1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/core/SkBitmapProcState_shaderproc.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,94 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2011 Google Inc.
1.7 + *
1.8 + * Use of this source code is governed by a BSD-style license that can be
1.9 + * found in the LICENSE file.
1.10 + */
1.11 +
1.12 +#include "SkMathPriv.h"
1.13 +
1.14 +#define SCALE_FILTER_NAME MAKENAME(_filter_DX_shaderproc)
1.15 +
1.16 +// Can't be static in the general case because some of these implementations
1.17 +// will be defined and referenced in different object files.
1.18 +void SCALE_FILTER_NAME(const SkBitmapProcState& s, int x, int y,
1.19 + DSTTYPE* SK_RESTRICT colors, int count);
1.20 +
1.21 +void SCALE_FILTER_NAME(const SkBitmapProcState& s, int x, int y,
1.22 + DSTTYPE* SK_RESTRICT colors, int count) {
1.23 + SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask |
1.24 + SkMatrix::kScale_Mask)) == 0);
1.25 + SkASSERT(s.fInvKy == 0);
1.26 + SkASSERT(count > 0 && colors != NULL);
1.27 + SkASSERT(s.fFilterLevel != SkPaint::kNone_FilterLevel);
1.28 + SkDEBUGCODE(CHECKSTATE(s);)
1.29 +
1.30 + const unsigned maxX = s.fBitmap->width() - 1;
1.31 + const SkFixed oneX = s.fFilterOneX;
1.32 + const SkFixed dx = s.fInvSx;
1.33 + SkFixed fx;
1.34 + const SRCTYPE* SK_RESTRICT row0;
1.35 + const SRCTYPE* SK_RESTRICT row1;
1.36 + unsigned subY;
1.37 +
1.38 + {
1.39 + SkPoint pt;
1.40 + s.fInvProc(s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf,
1.41 + SkIntToScalar(y) + SK_ScalarHalf, &pt);
1.42 + SkFixed fy = SkScalarToFixed(pt.fY) - (s.fFilterOneY >> 1);
1.43 + const unsigned maxY = s.fBitmap->height() - 1;
1.44 + // compute our two Y values up front
1.45 + subY = TILEY_LOW_BITS(fy, maxY);
1.46 + int y0 = TILEY_PROCF(fy, maxY);
1.47 + int y1 = TILEY_PROCF((fy + s.fFilterOneY), maxY);
1.48 +
1.49 + const char* SK_RESTRICT srcAddr = (const char*)s.fBitmap->getPixels();
1.50 + size_t rb = s.fBitmap->rowBytes();
1.51 + row0 = (const SRCTYPE*)(srcAddr + y0 * rb);
1.52 + row1 = (const SRCTYPE*)(srcAddr + y1 * rb);
1.53 + // now initialize fx
1.54 + fx = SkScalarToFixed(pt.fX) - (oneX >> 1);
1.55 + }
1.56 +
1.57 +#ifdef PREAMBLE
1.58 + PREAMBLE(s);
1.59 +#endif
1.60 +
1.61 + do {
1.62 + unsigned subX = TILEX_LOW_BITS(fx, maxX);
1.63 + unsigned x0 = TILEX_PROCF(fx, maxX);
1.64 + unsigned x1 = TILEX_PROCF((fx + oneX), maxX);
1.65 +
1.66 + FILTER_PROC(subX, subY,
1.67 + SRC_TO_FILTER(row0[x0]),
1.68 + SRC_TO_FILTER(row0[x1]),
1.69 + SRC_TO_FILTER(row1[x0]),
1.70 + SRC_TO_FILTER(row1[x1]),
1.71 + colors);
1.72 + colors += 1;
1.73 +
1.74 + fx += dx;
1.75 + } while (--count != 0);
1.76 +
1.77 +#ifdef POSTAMBLE
1.78 + POSTAMBLE(s);
1.79 +#endif
1.80 +}
1.81 +
1.82 +///////////////////////////////////////////////////////////////////////////////
1.83 +
1.84 +#undef TILEX_PROCF
1.85 +#undef TILEY_PROCF
1.86 +#undef TILEX_LOW_BITS
1.87 +#undef TILEY_LOW_BITS
1.88 +#undef MAKENAME
1.89 +#undef SRCTYPE
1.90 +#undef DSTTYPE
1.91 +#undef CHECKSTATE
1.92 +#undef SRC_TO_FILTER
1.93 +#undef FILTER_TO_DST
1.94 +#undef PREAMBLE
1.95 +#undef POSTAMBLE
1.96 +
1.97 +#undef SCALE_FILTER_NAME
