Index: skia/effects/SkUnitMappers.cpp |
=================================================================== |
--- skia/effects/SkUnitMappers.cpp (revision 16859) |
+++ skia/effects/SkUnitMappers.cpp (working copy) |
@@ -1,80 +0,0 @@ |
-#include "SkUnitMappers.h" |
- |
-SkDiscreteMapper::SkDiscreteMapper(int segments) |
-{ |
- if (segments < 2) |
- { |
- fSegments = 0; |
- fScale = 0; |
- } |
- else |
- { |
- if (segments > 0xFFFF) |
- segments = 0xFFFF; |
- fSegments = segments; |
- fScale = SK_Fract1 / (segments - 1); |
- } |
-} |
- |
-uint16_t SkDiscreteMapper::mapUnit16(uint16_t input) |
-{ |
- SkFixed x = input * fSegments >> 16; |
- x = x * fScale >> 14; |
- x += x << 15 >> 31; // map 0x10000 to 0xFFFF |
- return SkToU16(x); |
-} |
- |
-SkDiscreteMapper::SkDiscreteMapper(SkFlattenableReadBuffer& rb) |
- : SkUnitMapper(rb) |
-{ |
- fSegments = rb.readU32(); |
- fScale = rb.readU32(); |
-} |
- |
-SkFlattenable::Factory SkDiscreteMapper::getFactory() |
-{ |
- return Create; |
-} |
- |
-SkFlattenable* SkDiscreteMapper::Create(SkFlattenableReadBuffer& rb) |
-{ |
- return SkNEW_ARGS(SkDiscreteMapper, (rb)); |
-} |
- |
-void SkDiscreteMapper::flatten(SkFlattenableWriteBuffer& wb) |
-{ |
- this->INHERITED::flatten(wb); |
- |
- wb.write32(fSegments); |
- wb.write32(fScale); |
-} |
- |
-/////////////////////////////////////////////////////////////////////////////// |
- |
-uint16_t SkCosineMapper::mapUnit16(uint16_t input) |
-{ |
- /* we want to call cosine(input * pi/2) treating input as [0...1) |
- however, the straight multitply would overflow 32bits since input is |
- 16bits and pi/2 is 17bits, so we shift down our pi const before we mul |
- */ |
- SkFixed rads = (unsigned)(input * (SK_FixedPI >> 2)) >> 15; |
- SkFixed x = SkFixedCos(rads); |
- x += x << 15 >> 31; // map 0x10000 to 0xFFFF |
- return SkToU16(x); |
-} |
- |
-SkCosineMapper::SkCosineMapper(SkFlattenableReadBuffer& rb) |
- : SkUnitMapper(rb) |
-{ |
-} |
- |
-SkFlattenable::Factory SkCosineMapper::getFactory() |
-{ |
- return Create; |
-} |
- |
-SkFlattenable* SkCosineMapper::Create(SkFlattenableReadBuffer& rb) |
-{ |
- return SkNEW_ARGS(SkCosineMapper, (rb)); |
-} |
- |