SkBitmap::HeapAllocator Class Reference

#include <SkBitmap.h>

Inheritance diagram for SkBitmap::HeapAllocator:

Public Member Functions
bool	allocPixelRef (SkBitmap *bitmap) override

Detailed Description

Subclass of SkBitmap::Allocator that returns a SkPixelRef that allocates its pixel memory from the heap. This is the default SkBitmap::Allocator invoked by allocPixels().

Definition at line 1233 of file SkBitmap.h.

Member Function Documentation

allocPixelRef()

bool SkBitmap::HeapAllocator::allocPixelRef ( SkBitmap *  dst )

override

Allocates the pixel memory for the bitmap, given its dimensions and SkColorType. Returns true on success, where success means either setPixels() or setPixelRef() was called.

Parameters

bitmap

SkBitmap containing SkImageInfo as input, and SkPixelRef as output

Returns

true if pixels are allocated

example: https://fiddle.skia.org/c/@Bitmap_HeapAllocator_allocPixelRef

We explicitly use the same allocator for our pixels that SkMask does, so that we can freely assign memory allocated by one class to the other.

Definition at line 377 of file SkBitmap.cpp.

                                                       {
    const SkImageInfo& info = dst->info();
    if (kUnknown_SkColorType == info.colorType()) {
//        SkDebugf("unsupported config for info %d\n", dst->config());
        return false;
    }
 
    sk_sp<SkPixelRef> pr = SkMallocPixelRef::MakeAllocate(info, dst->rowBytes());
    if (!pr) {
        return false;
    }
 
    dst->setPixelRef(std::move(pr), 0, 0);
    SkDEBUGCODE(dst->validate();)
    return true;
}

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The documentation for this class was generated from the following files:

• third_party/skia/include/core/SkBitmap.h
• third_party/skia/src/core/SkBitmap.cpp