SkMask.cpp File Reference

#include "src/core/SkMask.h"
#include "include/private/base/SkMalloc.h"
#include "include/private/base/SkMath.h"
#include "include/private/base/SkTFitsIn.h"
#include "include/private/base/SkTo.h"
#include "src/base/SkSafeMath.h"
#include <array>
#include <climits>

Go to the source code of this file.

Functions
static int32_t	safeMul32 (int32_t a, int32_t b)
static int	maskFormatToShift (SkMask::Format format)

Variables
static const int	gMaskFormatToShift []

Function Documentation

maskFormatToShift()

static int maskFormatToShift ( SkMask::Format  format )

static

Definition at line 106 of file SkMask.cpp.

                                                  {
    SkASSERT((unsigned)format < std::size(gMaskFormatToShift));
    SkASSERT(SkMask::kBW_Format != format);
    return gMaskFormatToShift[format];
}

safeMul32()

static int32_t safeMul32 ( int32_t  a, int32_t  b  )

static

returns the product if it is positive and fits in 31 bits. Otherwise this returns 0.

Definition at line 22 of file SkMask.cpp.

                                               {
    int64_t size = sk_64_mul(a, b);
    if (size > 0 && SkTFitsIn<int32_t>(size)) {
        return size;
    }
    return 0;
}

Variable Documentation

gMaskFormatToShift

const int gMaskFormatToShift[]

static

Initial value:

= {
    ~0, 
    0,  
    0,  
    2,  
    1,  
    0,  
}

Definition at line 97 of file SkMask.cpp.

                                        {
    ~0, // BW -- not supported
    0,  // A8
    0,  // 3D
    2,  // ARGB32
    1,  // LCD16
    0,  // SDF
};