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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrBitmapTextureMaker.h"
#include "GrContext.h"
#include "GrContextPriv.h"
#include "GrGpuResourcePriv.h"
#include "GrResourceProvider.h"
#include "GrSurfaceContext.h"
#include "SkBitmap.h"
#include "SkGr.h"
#include "SkMipMap.h"
#include "SkPixelRef.h"
static bool bmp_is_alpha_only(const SkBitmap& bm) { return kAlpha_8_SkColorType == bm.colorType(); }
GrBitmapTextureMaker::GrBitmapTextureMaker(GrContext* context, const SkBitmap& bitmap)
: INHERITED(context, bitmap.width(), bitmap.height(), bmp_is_alpha_only(bitmap))
, fBitmap(bitmap) {
if (!bitmap.isVolatile()) {
SkIPoint origin = bitmap.pixelRefOrigin();
SkIRect subset = SkIRect::MakeXYWH(origin.fX, origin.fY, bitmap.width(),
bitmap.height());
GrMakeKeyFromImageID(&fOriginalKey, bitmap.pixelRef()->getGenerationID(), subset);
}
}
sk_sp<GrTextureProxy> GrBitmapTextureMaker::refOriginalTextureProxy(bool willBeMipped,
SkColorSpace* dstColorSpace,
AllowedTexGenType onlyIfFast) {
if (AllowedTexGenType::kCheap == onlyIfFast) {
return nullptr;
}
sk_sp<GrTextureProxy> originalProxy;
if (fOriginalKey.isValid()) {
originalProxy = this->context()->resourceProvider()->findOrCreateProxyByUniqueKey(
fOriginalKey, kTopLeft_GrSurfaceOrigin);
if (originalProxy && (!willBeMipped || originalProxy->isMipMapped())) {
return originalProxy;
}
}
sk_sp<GrTextureProxy> proxy;
if (willBeMipped) {
if (!originalProxy) {
proxy = GrGenerateMipMapsAndUploadToTextureProxy(this->context(), fBitmap,
dstColorSpace);
} else {
proxy = GrCopyBaseMipMapToTextureProxy(this->context(), originalProxy.get(),
dstColorSpace);
}
}
if (!proxy) {
proxy = GrUploadBitmapToTextureProxy(this->context()->resourceProvider(), fBitmap,
dstColorSpace);
}
if (proxy && fOriginalKey.isValid()) {
SkASSERT(proxy->origin() == kTopLeft_GrSurfaceOrigin);
if (originalProxy) {
// In this case we are stealing the key from the original proxy which should only happen
// when we have just generated mipmaps for an originally unmipped proxy/texture. This
// means that all future uses of the key will access the mipmapped version. The texture
// backing the unmipped version will remain in the resource cache until the last texture
// proxy referencing it is deleted at which time it too will be deleted or recycled.
this->context()->resourceProvider()->removeUniqueKeyFromProxy(fOriginalKey,
originalProxy.get());
}
this->context()->resourceProvider()->assignUniqueKeyToProxy(fOriginalKey, proxy.get());
GrInstallBitmapUniqueKeyInvalidator(fOriginalKey, fBitmap.pixelRef());
}
return proxy;
}
void GrBitmapTextureMaker::makeCopyKey(const CopyParams& copyParams, GrUniqueKey* copyKey,
SkColorSpace* dstColorSpace) {
// Destination color space is irrelevant - we always upload the bitmap's contents as-is
if (fOriginalKey.isValid()) {
MakeCopyKeyFromOrigKey(fOriginalKey, copyParams, copyKey);
}
}
void GrBitmapTextureMaker::didCacheCopy(const GrUniqueKey& copyKey) {
GrInstallBitmapUniqueKeyInvalidator(copyKey, fBitmap.pixelRef());
}
SkAlphaType GrBitmapTextureMaker::alphaType() const {
return fBitmap.alphaType();
}
sk_sp<SkColorSpace> GrBitmapTextureMaker::getColorSpace(SkColorSpace* dstColorSpace) {
// Color space doesn't depend on destination color space - it's just whatever is in the bitmap
return fBitmap.refColorSpace();
}
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