| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkBitmapProcState_MatrixTemplates_DEFINED |
| #define SkBitmapProcState_MatrixTemplates_DEFINED |
| |
| #include "SkMath.h" |
| #include "SkMathPriv.h" |
| |
| template <typename TileProc, bool tryDecal> |
| void NoFilterProc_Scale(const SkBitmapProcState& s, uint32_t xy[], |
| int count, int x, int y) { |
| SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask | |
| SkMatrix::kScale_Mask)) == 0); |
| |
| // we store y, x, x, x, x, x |
| |
| const unsigned maxX = s.fPixmap.width() - 1; |
| SkFractionalInt fx; |
| { |
| const SkBitmapProcStateAutoMapper mapper(s, x, y); |
| const unsigned maxY = s.fPixmap.height() - 1; |
| *xy++ = TileProc::Y(s, mapper.fixedY(), maxY); |
| fx = mapper.fractionalIntX(); |
| } |
| |
| if (0 == maxX) { |
| // all of the following X values must be 0 |
| memset(xy, 0, count * sizeof(uint16_t)); |
| return; |
| } |
| |
| const SkFractionalInt dx = s.fInvSxFractionalInt; |
| |
| if (tryDecal) { |
| const SkFixed fixedFx = SkFractionalIntToFixed(fx); |
| const SkFixed fixedDx = SkFractionalIntToFixed(dx); |
| |
| if (can_truncate_to_fixed_for_decal(fixedFx, fixedDx, count, maxX)) { |
| decal_nofilter_scale(xy, fixedFx, fixedDx, count); |
| return; |
| } |
| } |
| |
| int i; |
| for (i = (count >> 2); i > 0; --i) { |
| unsigned a, b; |
| a = TileProc::X(s, SkFractionalIntToFixed(fx), maxX); fx += dx; |
| b = TileProc::X(s, SkFractionalIntToFixed(fx), maxX); fx += dx; |
| #ifdef SK_CPU_BENDIAN |
| *xy++ = (a << 16) | b; |
| #else |
| *xy++ = (b << 16) | a; |
| #endif |
| a = TileProc::X(s, SkFractionalIntToFixed(fx), maxX); fx += dx; |
| b = TileProc::X(s, SkFractionalIntToFixed(fx), maxX); fx += dx; |
| #ifdef SK_CPU_BENDIAN |
| *xy++ = (a << 16) | b; |
| #else |
| *xy++ = (b << 16) | a; |
| #endif |
| } |
| uint16_t* xx = (uint16_t*)xy; |
| for (i = (count & 3); i > 0; --i) { |
| *xx++ = TileProc::X(s, SkFractionalIntToFixed(fx), maxX); fx += dx; |
| } |
| } |
| |
| #endif |