1 /* 2 * Copyright 2013 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkBitmapProcState_MatrixTemplates_DEFINED 9 #define SkBitmapProcState_MatrixTemplates_DEFINED 10 11 #include "SkMath.h" 12 #include "SkMathPriv.h" 13 14 template <typename TileProc, bool tryDecal> 15 void NoFilterProc_Scale(const SkBitmapProcState& s, uint32_t xy[], 16 int count, int x, int y) { 17 SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask | 18 SkMatrix::kScale_Mask)) == 0); 19 20 // we store y, x, x, x, x, x 21 22 const unsigned maxX = s.fPixmap.width() - 1; 23 SkFractionalInt fx; 24 { 25 const SkBitmapProcStateAutoMapper mapper(s, x, y); 26 const unsigned maxY = s.fPixmap.height() - 1; 27 *xy++ = TileProc::Y(s, mapper.fixedY(), maxY); 28 fx = mapper.fractionalIntX(); 29 } 30 31 if (0 == maxX) { 32 // all of the following X values must be 0 33 memset(xy, 0, count * sizeof(uint16_t)); 34 return; 35 } 36 37 const SkFractionalInt dx = s.fInvSxFractionalInt; 38 39 if (tryDecal) { 40 const SkFixed fixedFx = SkFractionalIntToFixed(fx); 41 const SkFixed fixedDx = SkFractionalIntToFixed(dx); 42 43 if (can_truncate_to_fixed_for_decal(fixedFx, fixedDx, count, maxX)) { 44 decal_nofilter_scale(xy, fixedFx, fixedDx, count); 45 return; 46 } 47 } 48 49 int i; 50 for (i = (count >> 2); i > 0; --i) { 51 unsigned a, b; 52 a = TileProc::X(s, SkFractionalIntToFixed(fx), maxX); fx += dx; 53 b = TileProc::X(s, SkFractionalIntToFixed(fx), maxX); fx += dx; 54 #ifdef SK_CPU_BENDIAN 55 *xy++ = (a << 16) | b; 56 #else 57 *xy++ = (b << 16) | a; 58 #endif 59 a = TileProc::X(s, SkFractionalIntToFixed(fx), maxX); fx += dx; 60 b = TileProc::X(s, SkFractionalIntToFixed(fx), maxX); fx += dx; 61 #ifdef SK_CPU_BENDIAN 62 *xy++ = (a << 16) | b; 63 #else 64 *xy++ = (b << 16) | a; 65 #endif 66 } 67 uint16_t* xx = (uint16_t*)xy; 68 for (i = (count & 3); i > 0; --i) { 69 *xx++ = TileProc::X(s, SkFractionalIntToFixed(fx), maxX); fx += dx; 70 } 71 } 72 73 #endif 74
