gfx/skia/trunk/src/core/SkBitmapProcState_shaderproc.h@b8a032363ba2 (annotated)
gfx/skia/trunk/src/core/SkBitmapProcState_shaderproc.h
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | |
| michael@0 | 2 | /* |
| michael@0 | 3 | * Copyright 2011 Google Inc. |
| michael@0 | 4 | * |
| michael@0 | 5 | * Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 6 | * found in the LICENSE file. |
| michael@0 | 7 | */ |
| michael@0 | 8 | |
| michael@0 | 9 | #include "SkMathPriv.h" |
| michael@0 | 10 | |
| michael@0 | 11 | #define SCALE_FILTER_NAME MAKENAME(_filter_DX_shaderproc) |
| michael@0 | 12 | |
| michael@0 | 13 | // Can't be static in the general case because some of these implementations |
| michael@0 | 14 | // will be defined and referenced in different object files. |
| michael@0 | 15 | void SCALE_FILTER_NAME(const SkBitmapProcState& s, int x, int y, |
| michael@0 | 16 | DSTTYPE* SK_RESTRICT colors, int count); |
| michael@0 | 17 | |
| michael@0 | 18 | void SCALE_FILTER_NAME(const SkBitmapProcState& s, int x, int y, |
| michael@0 | 19 | DSTTYPE* SK_RESTRICT colors, int count) { |
| michael@0 | 20 | SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask | |
| michael@0 | 21 | SkMatrix::kScale_Mask)) == 0); |
| michael@0 | 22 | SkASSERT(s.fInvKy == 0); |
| michael@0 | 23 | SkASSERT(count > 0 && colors != NULL); |
| michael@0 | 24 | SkASSERT(s.fFilterLevel != SkPaint::kNone_FilterLevel); |
| michael@0 | 25 | SkDEBUGCODE(CHECKSTATE(s);) |
| michael@0 | 26 | |
| michael@0 | 27 | const unsigned maxX = s.fBitmap->width() - 1; |
| michael@0 | 28 | const SkFixed oneX = s.fFilterOneX; |
| michael@0 | 29 | const SkFixed dx = s.fInvSx; |
| michael@0 | 30 | SkFixed fx; |
| michael@0 | 31 | const SRCTYPE* SK_RESTRICT row0; |
| michael@0 | 32 | const SRCTYPE* SK_RESTRICT row1; |
| michael@0 | 33 | unsigned subY; |
| michael@0 | 34 | |
| michael@0 | 35 | { |
| michael@0 | 36 | SkPoint pt; |
| michael@0 | 37 | s.fInvProc(s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf, |
| michael@0 | 38 | SkIntToScalar(y) + SK_ScalarHalf, &pt); |
| michael@0 | 39 | SkFixed fy = SkScalarToFixed(pt.fY) - (s.fFilterOneY >> 1); |
| michael@0 | 40 | const unsigned maxY = s.fBitmap->height() - 1; |
| michael@0 | 41 | // compute our two Y values up front |
| michael@0 | 42 | subY = TILEY_LOW_BITS(fy, maxY); |
| michael@0 | 43 | int y0 = TILEY_PROCF(fy, maxY); |
| michael@0 | 44 | int y1 = TILEY_PROCF((fy + s.fFilterOneY), maxY); |
| michael@0 | 45 | |
| michael@0 | 46 | const char* SK_RESTRICT srcAddr = (const char*)s.fBitmap->getPixels(); |
| michael@0 | 47 | size_t rb = s.fBitmap->rowBytes(); |
| michael@0 | 48 | row0 = (const SRCTYPE*)(srcAddr + y0 * rb); |
| michael@0 | 49 | row1 = (const SRCTYPE*)(srcAddr + y1 * rb); |
| michael@0 | 50 | // now initialize fx |
| michael@0 | 51 | fx = SkScalarToFixed(pt.fX) - (oneX >> 1); |
| michael@0 | 52 | } |
| michael@0 | 53 | |
| michael@0 | 54 | #ifdef PREAMBLE |
| michael@0 | 55 | PREAMBLE(s); |
| michael@0 | 56 | #endif |
| michael@0 | 57 | |
| michael@0 | 58 | do { |
| michael@0 | 59 | unsigned subX = TILEX_LOW_BITS(fx, maxX); |
| michael@0 | 60 | unsigned x0 = TILEX_PROCF(fx, maxX); |
| michael@0 | 61 | unsigned x1 = TILEX_PROCF((fx + oneX), maxX); |
| michael@0 | 62 | |
| michael@0 | 63 | FILTER_PROC(subX, subY, |
| michael@0 | 64 | SRC_TO_FILTER(row0[x0]), |
| michael@0 | 65 | SRC_TO_FILTER(row0[x1]), |
| michael@0 | 66 | SRC_TO_FILTER(row1[x0]), |
| michael@0 | 67 | SRC_TO_FILTER(row1[x1]), |
| michael@0 | 68 | colors); |
| michael@0 | 69 | colors += 1; |
| michael@0 | 70 | |
| michael@0 | 71 | fx += dx; |
| michael@0 | 72 | } while (--count != 0); |
| michael@0 | 73 | |
| michael@0 | 74 | #ifdef POSTAMBLE |
| michael@0 | 75 | POSTAMBLE(s); |
| michael@0 | 76 | #endif |
| michael@0 | 77 | } |
| michael@0 | 78 | |
| michael@0 | 79 | /////////////////////////////////////////////////////////////////////////////// |
| michael@0 | 80 | |
| michael@0 | 81 | #undef TILEX_PROCF |
| michael@0 | 82 | #undef TILEY_PROCF |
| michael@0 | 83 | #undef TILEX_LOW_BITS |
| michael@0 | 84 | #undef TILEY_LOW_BITS |
| michael@0 | 85 | #undef MAKENAME |
| michael@0 | 86 | #undef SRCTYPE |
| michael@0 | 87 | #undef DSTTYPE |
| michael@0 | 88 | #undef CHECKSTATE |
| michael@0 | 89 | #undef SRC_TO_FILTER |
| michael@0 | 90 | #undef FILTER_TO_DST |
| michael@0 | 91 | #undef PREAMBLE |
| michael@0 | 92 | #undef POSTAMBLE |
| michael@0 | 93 | |
| michael@0 | 94 | #undef SCALE_FILTER_NAME |
