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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#define SCALE_FILTER_NAME MAKENAME(_filter_DX_shaderproc)
static void SCALE_FILTER_NAME(const SkBitmapProcState& s, int x, int y,
DSTTYPE* SK_RESTRICT colors, int count) {
SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask |
SkMatrix::kScale_Mask)) == 0);
SkASSERT(s.fInvKy == 0);
SkASSERT(count > 0 && colors != NULL);
SkASSERT(s.fDoFilter);
SkDEBUGCODE(CHECKSTATE(s);)
const unsigned maxX = s.fBitmap->width() - 1;
const SkFixed oneX = s.fFilterOneX;
const SkFixed dx = s.fInvSx;
SkFixed fx;
const SRCTYPE* SK_RESTRICT row0;
const SRCTYPE* SK_RESTRICT row1;
unsigned subY;
{
SkPoint pt;
s.fInvProc(*s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf,
SkIntToScalar(y) + SK_ScalarHalf, &pt);
SkFixed fy = SkScalarToFixed(pt.fY) - (s.fFilterOneY >> 1);
const unsigned maxY = s.fBitmap->height() - 1;
// compute our two Y values up front
subY = TILEY_LOW_BITS(fy, maxY);
int y0 = TILEY_PROCF(fy, maxY);
int y1 = TILEY_PROCF((fy + s.fFilterOneY), maxY);
const char* SK_RESTRICT srcAddr = (const char*)s.fBitmap->getPixels();
unsigned rb = s.fBitmap->rowBytes();
row0 = (const SRCTYPE*)(srcAddr + y0 * rb);
row1 = (const SRCTYPE*)(srcAddr + y1 * rb);
// now initialize fx
fx = SkScalarToFixed(pt.fX) - (oneX >> 1);
}
#ifdef PREAMBLE
PREAMBLE(s);
#endif
#ifdef S32_OPAQUE_D32_FILTER_DX_NEON
int post_count;
SkFixed post_fx;
DSTTYPE* SK_RESTRICT post_colors;
int num;
post_count = count;
post_fx = fx;
post_colors = colors;
if (dx>=0)
{
int end = ((int)maxX-1)<<16;
num = (end-fx)/dx;
if (num < 0) num = 0;
if (num<count)
{
count = num;
post_count = post_count - count;
post_fx = fx + count*dx;
post_colors = post_colors + count;
}
else
post_count = 0;
while (fx<0 && count) {
unsigned subX = TILEX_LOW_BITS(fx, maxX);
unsigned x0 = TILEX_PROCF(fx, maxX);
unsigned x1 = TILEX_PROCF((fx + oneX), maxX);
FILTER_PROC(subX, subY,
SRC_TO_FILTER(row0[x0]),
SRC_TO_FILTER(row0[x1]),
SRC_TO_FILTER(row1[x0]),
SRC_TO_FILTER(row1[x1]),
colors);
colors += 1;
fx += dx;
count--;
}
}
else
{
int end = 0;
int maxXFix = ((int)maxX-1)<<16;
num = (end-fx)/dx;
if (num < 0) num = 0;
if (num<count)
{
count = num;
post_count = post_count - count;
post_fx = fx + count*dx;
post_colors = post_colors + count;
}
else
post_count = 0;
while (fx>=maxXFix && count) {
unsigned subX = TILEX_LOW_BITS(fx, maxX);
unsigned x0 = TILEX_PROCF(fx, maxX);
unsigned x1 = TILEX_PROCF((fx + oneX), maxX);
FILTER_PROC(subX, subY,
SRC_TO_FILTER(row0[x0]),
SRC_TO_FILTER(row0[x1]),
SRC_TO_FILTER(row1[x0]),
SRC_TO_FILTER(row1[x1]),
colors);
colors += 1;
fx += dx;
count--;
}
}
S32_Opaque_D32_filter_DX_shaderproc_neon(row0, row1, fx, maxX, subY, colors, dx, count);
fx = post_fx;
colors = post_colors;
while (post_count) {
unsigned subX = TILEX_LOW_BITS(fx, maxX);
unsigned x0 = TILEX_PROCF(fx, maxX);
unsigned x1 = TILEX_PROCF((fx + oneX), maxX);
FILTER_PROC(subX, subY,
SRC_TO_FILTER(row0[x0]),
SRC_TO_FILTER(row0[x1]),
SRC_TO_FILTER(row1[x0]),
SRC_TO_FILTER(row1[x1]),
colors);
colors += 1;
fx += dx;
post_count--;
}
#else //S32_OPAQUE_D32_FILTER_DX_NEON
do {
unsigned subX = TILEX_LOW_BITS(fx, maxX);
unsigned x0 = TILEX_PROCF(fx, maxX);
unsigned x1 = TILEX_PROCF((fx + oneX), maxX);
FILTER_PROC(subX, subY,
SRC_TO_FILTER(row0[x0]),
SRC_TO_FILTER(row0[x1]),
SRC_TO_FILTER(row1[x0]),
SRC_TO_FILTER(row1[x1]),
colors);
colors += 1;
fx += dx;
} while (--count != 0);
#endif //S32_OPAQUE_D32_FILTER_DX_NEON
#ifdef POSTAMBLE
POSTAMBLE(s);
#endif
}
///////////////////////////////////////////////////////////////////////////////
#undef TILEX_PROCF
#undef TILEY_PROCF
#undef TILEX_LOW_BITS
#undef TILEY_LOW_BITS
#undef MAKENAME
#undef SRCTYPE
#undef DSTTYPE
#undef CHECKSTATE
#undef SRC_TO_FILTER
#undef FILTER_TO_DST
#undef PREAMBLE
#undef POSTAMBLE
#undef SCALE_FILTER_NAME
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