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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 "GrProxyProvider.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;
}
GrProxyProvider* proxyProvider = this->context()->contextPriv().proxyProvider();
sk_sp<GrTextureProxy> proxy;
if (fOriginalKey.isValid()) {
proxy = proxyProvider->findOrCreateProxyByUniqueKey(fOriginalKey, kTopLeft_GrSurfaceOrigin);
if (proxy && (!willBeMipped || GrMipMapped::kYes == proxy->mipMapped())) {
return proxy;
}
}
if (!proxy) {
if (willBeMipped) {
proxy = GrGenerateMipMapsAndUploadToTextureProxy(proxyProvider, fBitmap, dstColorSpace);
}
if (!proxy) {
proxy = GrUploadBitmapToTextureProxy(proxyProvider, fBitmap, dstColorSpace);
}
if (proxy) {
if (fOriginalKey.isValid()) {
proxyProvider->assignUniqueKeyToProxy(fOriginalKey, proxy.get());
}
if (!willBeMipped || GrMipMapped::kYes == proxy->mipMapped()) {
SkASSERT(proxy->origin() == kTopLeft_GrSurfaceOrigin);
if (fOriginalKey.isValid()) {
GrInstallBitmapUniqueKeyInvalidator(fOriginalKey, fBitmap.pixelRef());
}
return proxy;
}
}
}
if (proxy) {
SkASSERT(willBeMipped);
SkASSERT(GrMipMapped::kNo == proxy->mipMapped());
// We need a mipped proxy, but we either found a proxy earlier that wasn't mipped or
// generated a non mipped proxy. Thus we generate a new mipped surface and copy the original
// proxy into the base layer. We will then let the gpu generate the rest of the mips.
if (auto mippedProxy = GrCopyBaseMipMapToTextureProxy(this->context(), proxy.get())) {
SkASSERT(mippedProxy->origin() == kTopLeft_GrSurfaceOrigin);
if (fOriginalKey.isValid()) {
// 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.
proxyProvider->removeUniqueKeyFromProxy(fOriginalKey, proxy.get());
proxyProvider->assignUniqueKeyToProxy(fOriginalKey, mippedProxy.get());
GrInstallBitmapUniqueKeyInvalidator(fOriginalKey, fBitmap.pixelRef());
}
return mippedProxy;
}
// We failed to make a mipped proxy with the base copied into it. This could have
// been from failure to make the proxy or failure to do the copy. Thus we will fall
// back to just using the non mipped proxy; See skbug.com/7094.
return proxy;
}
return nullptr;
}
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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