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author | initial.commit <initial.commit@0039d316-1c4b-4281-b951-d872f2087c98> | 2008-07-27 00:09:42 +0000 |
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committer | initial.commit <initial.commit@0039d316-1c4b-4281-b951-d872f2087c98> | 2008-07-27 00:09:42 +0000 |
commit | ae2c20f398933a9e86c387dcc465ec0f71065ffc (patch) | |
tree | de668b1411e2ee0b4e49b6d8f8b68183134ac990 /skia/corecg/SkFloat.h | |
parent | 09911bf300f1a419907a9412154760efd0b7abc3 (diff) | |
download | chromium_src-ae2c20f398933a9e86c387dcc465ec0f71065ffc.zip chromium_src-ae2c20f398933a9e86c387dcc465ec0f71065ffc.tar.gz chromium_src-ae2c20f398933a9e86c387dcc465ec0f71065ffc.tar.bz2 |
Add skia to the repository.
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@16 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'skia/corecg/SkFloat.h')
-rw-r--r-- | skia/corecg/SkFloat.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/skia/corecg/SkFloat.h b/skia/corecg/SkFloat.h new file mode 100644 index 0000000..2a2abac --- /dev/null +++ b/skia/corecg/SkFloat.h @@ -0,0 +1,118 @@ +/* + * Copyright (C) 2006-2008 Google Inc. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef SkFloat_DEFINED +#define SkFloat_DEFINED + +#include "SkFixed.h" + +class SkFloat { +public: + SkFloat() {} + + void setZero() { fPacked = 0; } +// void setShift(int value, int shift) { fPacked = SetShift(value, shift); } + void setInt(int value) { fPacked = SetShift(value, 0); } + void setFixed(SkFixed value) { fPacked = SetShift(value, -16); } + void setFract(SkFract value) { fPacked = SetShift(value, -30); } + +// int getShift(int shift) const { return GetShift(fPacked, shift); } + int getInt() const { return GetShift(fPacked, 0); } + SkFixed getFixed() const { return GetShift(fPacked, -16); } + SkFract getFract() const { return GetShift(fPacked, -30); } + + void abs() { fPacked = Abs(fPacked); } + void negate() { fPacked = Neg(fPacked); } + + void shiftLeft(int bits) { fPacked = Shift(fPacked, bits); } + void setShiftLeft(const SkFloat& a, int bits) { fPacked = Shift(a.fPacked, bits); } + + void shiftRight(int bits) { fPacked = Shift(fPacked, -bits); } + void setShiftRight(const SkFloat& a, int bits) { fPacked = Shift(a.fPacked, -bits); } + + void add(const SkFloat& a) { fPacked = Add(fPacked, a.fPacked); } + void setAdd(const SkFloat& a, const SkFloat& b) { fPacked = Add(a.fPacked, b.fPacked); } + + void sub(const SkFloat& a) { fPacked = Add(fPacked, Neg(a.fPacked)); } + void setSub(const SkFloat& a, const SkFloat& b) { fPacked = Add(a.fPacked, Neg(b.fPacked)); } + + void mul(const SkFloat& a) { fPacked = Mul(fPacked, a.fPacked); } + void setMul(const SkFloat& a, const SkFloat& b) { fPacked = Mul(a.fPacked, b.fPacked); } + + void div(const SkFloat& a) { fPacked = Div(fPacked, a.fPacked); } + void setDiv(const SkFloat& a, const SkFloat& b) { fPacked = Div(a.fPacked, b.fPacked); } + + void sqrt() { fPacked = Sqrt(fPacked); } + void setSqrt(const SkFloat& a) { fPacked = Sqrt(a.fPacked); } + void cubeRoot() { fPacked = CubeRoot(fPacked); } + void setCubeRoot(const SkFloat& a) { fPacked = CubeRoot(a.fPacked); } + + friend bool operator==(const SkFloat& a, const SkFloat& b) { return a.fPacked == b.fPacked; } + friend bool operator!=(const SkFloat& a, const SkFloat& b) { return a.fPacked != b.fPacked; } + friend bool operator<(const SkFloat& a, const SkFloat& b) { return Cmp(a.fPacked, b.fPacked) < 0; } + friend bool operator<=(const SkFloat& a, const SkFloat& b) { return Cmp(a.fPacked, b.fPacked) <= 0; } + friend bool operator>(const SkFloat& a, const SkFloat& b) { return Cmp(a.fPacked, b.fPacked) > 0; } + friend bool operator>=(const SkFloat& a, const SkFloat& b) { return Cmp(a.fPacked, b.fPacked) >= 0; } + +#ifdef SK_DEBUG + static void UnitTest(); + + void assertEquals(float f, int tolerance = 0) + { + union { + float fFloat; + int32_t fPacked; + } tmp; + + tmp.fFloat = f; + int d = tmp.fPacked - fPacked; + SkASSERT(SkAbs32(d) <= tolerance); + } + float getFloat() const + { + union { + float fFloat; + int32_t fPacked; + } tmp; + + tmp.fPacked = fPacked; + return tmp.fFloat; + } +#endif + +private: + int32_t fPacked; + + SkFloat(int32_t packed) : fPacked(fPacked) {} + +public: + static int GetShift(int32_t packed, int shift); + static int32_t SetShift(int value, int shift); + static int32_t Neg(int32_t); + static int32_t Abs(int32_t packed) { return (uint32_t)(packed << 1) >> 1; } + static int32_t Shift(int32_t, int bits); + static int32_t Add(int32_t, int32_t); + static int32_t Mul(int32_t, int32_t); + static int32_t MulInt(int32_t, int); + static int32_t Div(int32_t, int32_t); + static int32_t DivInt(int32_t, int); + static int32_t Invert(int32_t); + static int32_t Sqrt(int32_t); + static int32_t CubeRoot(int32_t); + static int Cmp(int32_t, int32_t); +}; + +#endif |