| /* |
| * 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 "SkMath.h" |
| #include "SkMathPriv.h" |
| |
| #define SCALE_FILTER_NAME MAKENAME(_filter_scale) |
| |
| #define PACK_FILTER_X_NAME MAKENAME(_pack_filter_x) |
| #define PACK_FILTER_Y_NAME MAKENAME(_pack_filter_y) |
| |
| #ifndef PREAMBLE |
| #define PREAMBLE(state) |
| #define PREAMBLE_PARAM_X |
| #define PREAMBLE_PARAM_Y |
| #define PREAMBLE_ARG_X |
| #define PREAMBLE_ARG_Y |
| #endif |
| |
| // declare functions externally to suppress warnings. |
| void SCALE_FILTER_NAME(const SkBitmapProcState& s, |
| uint32_t xy[], int count, int x, int y); |
| |
| static inline uint32_t PACK_FILTER_Y_NAME(SkFixed f, unsigned max, |
| SkFixed one PREAMBLE_PARAM_Y) { |
| unsigned i = TILEY_PROCF(f, max); |
| i = (i << 4) | EXTRACT_LOW_BITS(f, max); |
| return (i << 14) | (TILEY_PROCF((f + one), max)); |
| } |
| |
| static inline uint32_t PACK_FILTER_X_NAME(SkFixed f, unsigned max, |
| SkFixed one PREAMBLE_PARAM_X) { |
| unsigned i = TILEX_PROCF(f, max); |
| i = (i << 4) | EXTRACT_LOW_BITS(f, max); |
| return (i << 14) | (TILEX_PROCF((f + one), max)); |
| } |
| |
| void SCALE_FILTER_NAME(const SkBitmapProcState& s, |
| uint32_t xy[], int count, int x, int y) { |
| SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask | |
| SkMatrix::kScale_Mask)) == 0); |
| SkASSERT(s.fInvKy == 0); |
| |
| PREAMBLE(s); |
| |
| const unsigned maxX = s.fPixmap.width() - 1; |
| const SkFixed one = s.fFilterOneX; |
| const SkFractionalInt dx = s.fInvSxFractionalInt; |
| SkFractionalInt fx; |
| |
| { |
| const SkBitmapProcStateAutoMapper mapper(s, x, y); |
| const SkFixed fy = mapper.fixedY(); |
| const unsigned maxY = s.fPixmap.height() - 1; |
| // compute our two Y values up front |
| *xy++ = PACK_FILTER_Y_NAME(fy, maxY, s.fFilterOneY PREAMBLE_ARG_Y); |
| // now initialize fx |
| fx = mapper.fractionalIntX(); |
| } |
| |
| #ifdef CHECK_FOR_DECAL |
| const SkFixed fixedFx = SkFractionalIntToFixed(fx); |
| const SkFixed fixedDx = SkFractionalIntToFixed(dx); |
| if (can_truncate_to_fixed_for_decal(fixedFx, fixedDx, count, maxX)) { |
| decal_filter_scale(xy, fixedFx, fixedDx, count); |
| } else |
| #endif |
| { |
| do { |
| SkFixed fixedFx = SkFractionalIntToFixed(fx); |
| *xy++ = PACK_FILTER_X_NAME(fixedFx, maxX, one PREAMBLE_ARG_X); |
| fx += dx; |
| } while (--count != 0); |
| } |
| } |
| |
| #undef MAKENAME |
| #undef TILEX_PROCF |
| #undef TILEY_PROCF |
| #ifdef CHECK_FOR_DECAL |
| #undef CHECK_FOR_DECAL |
| #endif |
| |
| #undef SCALE_FILTER_NAME |
| |
| #undef PREAMBLE |
| #undef PREAMBLE_PARAM_X |
| #undef PREAMBLE_PARAM_Y |
| #undef PREAMBLE_ARG_X |
| #undef PREAMBLE_ARG_Y |
| |
| #undef EXTRACT_LOW_BITS |