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* Copyright 2015 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifndef SkImageCacherator_DEFINED
#define SkImageCacherator_DEFINED
#include "SkImage.h"
#include "SkImageInfo.h"
#include "GrTextureMaker.h"
class GrCaps;
class GrContext;
class GrTextureProxy;
class GrUniqueKey;
class SkColorSpace;
* Interface used by GrImageTextureMaker to construct textures from instances of SkImage
* (specifically, SkImage_Lazy).
class SkImageCacherator {
virtual ~SkImageCacherator() {}
enum CachedFormat {
kLegacy_CachedFormat, // The format from the generator, with any color space stripped out
kLinearF16_CachedFormat, // Half float RGBA with linear gamma
kSRGB8888_CachedFormat, // sRGB bytes
kSBGR8888_CachedFormat, // sRGB bytes, in BGR order
virtual CachedFormat chooseCacheFormat(SkColorSpace* dstColorSpace,
const GrCaps* = nullptr) const = 0;
virtual SkImageInfo buildCacheInfo(CachedFormat) const = 0;
// Returns the texture proxy. If the cacherator is generating the texture and wants to cache it,
// it should use the passed in key (if the key is valid).
// If "genType" argument equals AllowedTexGenType::kCheap and the texture is not trivial to
// construct then refOriginalTextureProxy should return nullptr (for example if texture is made
// by drawing into a render target).
virtual sk_sp<GrTextureProxy> lockTextureProxy(GrContext*, const GrUniqueKey& key,
SkImage::CachingHint, bool willBeMipped,
SkColorSpace* dstColorSpace,
GrTextureMaker::AllowedTexGenType genType) = 0;
// Returns the color space of the texture that would be returned if you called lockTexture.
// Separate code path to allow querying of the color space for textures that cached (even
// externally).
virtual sk_sp<SkColorSpace> getColorSpace(GrContext*, SkColorSpace* dstColorSpace) = 0;
virtual void makeCacheKeyFromOrigKey(const GrUniqueKey& origKey, CachedFormat,
GrUniqueKey* cacheKey) = 0;