| File: | root/firefox-clang/obj-x86_64-pc-linux-gnu/gfx/skia/./../../../gfx/skia/skia/src/core/SkMipmapAccessor.cpp |
| Warning: | line 103, column 21 Value stored to 'resolvedMode' is never read |
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| 1 | /* |
| 2 | * Copyright 2015 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 | #include "src/core/SkMipmapAccessor.h" |
| 9 | |
| 10 | #include "include/core/SkBitmap.h" |
| 11 | #include "include/core/SkMatrix.h" |
| 12 | #include "include/core/SkSamplingOptions.h" |
| 13 | #include "include/core/SkScalar.h" |
| 14 | #include "include/core/SkSize.h" |
| 15 | #include "include/private/base/SkFloatingPoint.h" |
| 16 | #include "src/base/SkArenaAlloc.h" |
| 17 | #include "src/core/SkBitmapCache.h" |
| 18 | #include "src/core/SkMipmap.h" |
| 19 | #include "src/image/SkImage_Base.h" |
| 20 | |
| 21 | class SkImage; |
| 22 | |
| 23 | // Try to load from the base image, or from the cache |
| 24 | static sk_sp<const SkMipmap> try_load_mips(const SkImage_Base* image) { |
| 25 | sk_sp<const SkMipmap> mips = image->refMips(); |
| 26 | if (!mips) { |
| 27 | mips.reset(SkMipmapCache::FindAndRef(SkBitmapCacheDesc::Make(image))); |
| 28 | } |
| 29 | if (!mips) { |
| 30 | mips.reset(SkMipmapCache::AddAndRef(image)); |
| 31 | } |
| 32 | return mips; |
| 33 | } |
| 34 | |
| 35 | SkMipmapAccessor::SkMipmapAccessor(const SkImage_Base* image, const SkMatrix& inv, |
| 36 | SkMipmapMode requestedMode) { |
| 37 | SkMipmapMode resolvedMode = requestedMode; |
| 38 | fLowerWeight = 0; |
| 39 | |
| 40 | auto load_upper_from_base = [&]() { |
| 41 | // only do this once |
| 42 | if (fBaseStorage.getPixels() == nullptr) { |
| 43 | auto dContext = as_IB(image)->directContext(); |
| 44 | (void)image->getROPixels(dContext, &fBaseStorage); |
| 45 | fUpper.reset(fBaseStorage.info(), fBaseStorage.getPixels(), fBaseStorage.rowBytes()); |
| 46 | } |
| 47 | }; |
| 48 | |
| 49 | float level = 0; |
| 50 | if (requestedMode != SkMipmapMode::kNone) { |
| 51 | SkSize scale; |
| 52 | if (!inv.decomposeScale(&scale, nullptr)) { |
| 53 | resolvedMode = SkMipmapMode::kNone; |
| 54 | } else { |
| 55 | level = SkMipmap::ComputeLevel({1/scale.width(), 1/scale.height()}); |
| 56 | if (level <= 0) { |
| 57 | resolvedMode = SkMipmapMode::kNone; |
| 58 | level = 0; |
| 59 | } |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | auto scale = [image](const SkPixmap& pm) { |
| 64 | return SkMatrix::Scale(SkIntToScalar(pm.width())static_cast<SkScalar>(pm.width()) / image->width(), |
| 65 | SkIntToScalar(pm.height())static_cast<SkScalar>(pm.height()) / image->height()); |
| 66 | }; |
| 67 | |
| 68 | // Nearest mode uses this level, so we round to pick the nearest. In linear mode we use this |
| 69 | // level as the lower of the two to interpolate between, so we take the floor. |
| 70 | int levelNum = resolvedMode == SkMipmapMode::kNearest ? sk_float_round2int(level)sk_float_saturate2int((float)(std::floor(((double)(level)) + 0.5 ))) |
| 71 | : sk_float_floor2int(level)sk_float_saturate2int(std::floor(level)); |
| 72 | float lowerWeight = level - levelNum; // fract(level) |
| 73 | SkASSERT(levelNum >= 0)static_cast<void>( __builtin_expect(static_cast<bool >(levelNum >= 0), 1) ? static_cast<void>(0) : []{ do { if (sk_abort_is_enabled()) { do { SkDebugf("%s:%d" ": fatal error: \"" "check(%s)" "\"\n", "./../../../gfx/skia/skia/src/core/SkMipmapAccessor.cpp" , 73, "levelNum >= 0"); ; sk_abort_no_print(); } while (false ); } } while(false); }() ); |
| 74 | |
| 75 | if (levelNum == 0) { |
| 76 | load_upper_from_base(); |
| 77 | } |
| 78 | // load fCurrMip if needed |
| 79 | if (levelNum > 0 || (resolvedMode == SkMipmapMode::kLinear && lowerWeight > 0)) { |
| 80 | fCurrMip = try_load_mips(image); |
| 81 | if (!fCurrMip) { |
| 82 | load_upper_from_base(); |
| 83 | resolvedMode = SkMipmapMode::kNone; |
| 84 | } else { |
| 85 | SkMipmap::Level levelRec; |
| 86 | |
| 87 | SkASSERT(resolvedMode != SkMipmapMode::kNone)static_cast<void>( __builtin_expect(static_cast<bool >(resolvedMode != SkMipmapMode::kNone), 1) ? static_cast< void>(0) : []{ do { if (sk_abort_is_enabled()) { do { SkDebugf ("%s:%d" ": fatal error: \"" "check(%s)" "\"\n", "./../../../gfx/skia/skia/src/core/SkMipmapAccessor.cpp" , 87, "resolvedMode != SkMipmapMode::kNone"); ; sk_abort_no_print (); } while (false); } } while(false); }() ); |
| 88 | if (levelNum > 0) { |
| 89 | if (fCurrMip->getLevel(levelNum - 1, &levelRec)) { |
| 90 | fUpper = levelRec.fPixmap; |
| 91 | } else { |
| 92 | load_upper_from_base(); |
| 93 | resolvedMode = SkMipmapMode::kNone; |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | if (resolvedMode == SkMipmapMode::kLinear) { |
| 98 | if (fCurrMip->getLevel(levelNum, &levelRec)) { |
| 99 | fLower = levelRec.fPixmap; |
| 100 | fLowerWeight = lowerWeight; |
| 101 | fLowerInv = scale(fLower); |
| 102 | } else { |
| 103 | resolvedMode = SkMipmapMode::kNearest; |
Value stored to 'resolvedMode' is never read | |
| 104 | } |
| 105 | } |
| 106 | } |
| 107 | } |
| 108 | fUpperInv = scale(fUpper); |
| 109 | } |
| 110 | |
| 111 | SkMipmapAccessor* SkMipmapAccessor::Make(SkArenaAlloc* alloc, const SkImage* image, |
| 112 | const SkMatrix& inv, SkMipmapMode mipmap) { |
| 113 | auto* access = alloc->make<SkMipmapAccessor>(as_IB(image), inv, mipmap); |
| 114 | // return null if we failed to get the level (so the caller won't try to use it) |
| 115 | return access->fUpper.addr() ? access : nullptr; |
| 116 | } |