static sk_sp<SkSpecialImage> apply_morphology(
GrContext* context,
SkSpecialImage* input,
const SkIRect& rect,
GrMorphologyEffect::Type morphType,
SkISize radius,
const SkImageFilter::OutputProperties& outputProperties) {
sk_sp<GrTextureProxy> srcTexture(input->asTextureProxyRef(context));
SkASSERT(srcTexture);
sk_sp<SkColorSpace> colorSpace = sk_ref_sp(outputProperties.colorSpace());
GrPixelConfig config = SkColorType2GrPixelConfig(outputProperties.colorType());
// setup new clip
const GrFixedClip clip(SkIRect::MakeWH(srcTexture->width(), srcTexture->height()));
const SkIRect dstRect = SkIRect::MakeWH(rect.width(), rect.height());
SkIRect srcRect = rect;
SkASSERT(radius.width() > 0 || radius.height() > 0);
if (radius.fWidth > 0) {
sk_sp<GrRenderTargetContext> dstRTContext(
context->contextPriv().makeDeferredRenderTargetContext(
SkBackingFit::kApprox, rect.width(), rect.height(), config, colorSpace));
if (!dstRTContext) {
return nullptr;
}
apply_morphology_pass(dstRTContext.get(), clip, std::move(srcTexture), srcRect, dstRect,
radius.fWidth, morphType, GrMorphologyEffect::Direction::kX);
SkIRect clearRect = SkIRect::MakeXYWH(dstRect.fLeft, dstRect.fBottom,
dstRect.width(), radius.fHeight);
GrColor clearColor =
GrMorphologyEffect::Type::kErode == morphType ? SK_ColorWHITE : SK_ColorTRANSPARENT;
dstRTContext->clear(&clearRect, clearColor, GrRenderTargetContext::CanClearFullscreen::kNo);
srcTexture = dstRTContext->asTextureProxyRef();
srcRect = dstRect;
}
if (radius.fHeight > 0) {
sk_sp<GrRenderTargetContext> dstRTContext(
context->contextPriv().makeDeferredRenderTargetContext(
SkBackingFit::kApprox, rect.width(), rect.height(), config, colorSpace));
if (!dstRTContext) {
return nullptr;
}
apply_morphology_pass(dstRTContext.get(), clip, std::move(srcTexture), srcRect, dstRect,
radius.fHeight, morphType, GrMorphologyEffect::Direction::kY);
srcTexture = dstRTContext->asTextureProxyRef();
}
return SkSpecialImage::MakeDeferredFromGpu(context,
SkIRect::MakeWH(rect.width(), rect.height()),
kNeedNewImageUniqueID_SpecialImage,
std::move(srcTexture), std::move(colorSpace),
&input->props());
}
static sk_sp<SkSpecialImage> apply_morphology(GrContext* context,
SkSpecialImage* input,
const SkIRect& rect,
GrMorphologyEffect::MorphologyType morphType,
SkISize radius) {
SkAutoTUnref<GrTexture> srcTexture(input->asTextureRef(context));
SkASSERT(srcTexture);
// setup new clip
GrClip clip(SkRect::MakeWH(SkIntToScalar(srcTexture->width()),
SkIntToScalar(srcTexture->height())));
SkIRect dstRect = SkIRect::MakeWH(rect.width(), rect.height());
GrSurfaceDesc desc;
desc.fFlags = kRenderTarget_GrSurfaceFlag;
desc.fWidth = rect.width();
desc.fHeight = rect.height();
desc.fConfig = kSkia8888_GrPixelConfig;
SkIRect srcRect = rect;
SkASSERT(radius.width() > 0 || radius.height() > 0);
if (radius.fWidth > 0) {
GrTexture* scratch = context->textureProvider()->createApproxTexture(desc);
if (!scratch) {
return nullptr;
}
SkAutoTUnref<GrDrawContext> dstDrawContext(
context->drawContext(scratch->asRenderTarget()));
if (!dstDrawContext) {
return nullptr;
}
apply_morphology_pass(dstDrawContext, clip, srcTexture,
srcRect, dstRect, radius.fWidth, morphType,
Gr1DKernelEffect::kX_Direction);
SkIRect clearRect = SkIRect::MakeXYWH(dstRect.fLeft, dstRect.fBottom,
dstRect.width(), radius.fHeight);
GrColor clearColor = GrMorphologyEffect::kErode_MorphologyType == morphType ?
SK_ColorWHITE :
SK_ColorTRANSPARENT;
dstDrawContext->clear(&clearRect, clearColor, false);
srcTexture.reset(scratch);
srcRect = dstRect;
}
if (radius.fHeight > 0) {
GrTexture* scratch = context->textureProvider()->createApproxTexture(desc);
if (!scratch) {
return nullptr;
}
SkAutoTUnref<GrDrawContext> dstDrawContext(
context->drawContext(scratch->asRenderTarget()));
if (!dstDrawContext) {
return nullptr;
}
apply_morphology_pass(dstDrawContext, clip, srcTexture,
srcRect, dstRect, radius.fHeight, morphType,
Gr1DKernelEffect::kY_Direction);
srcTexture.reset(scratch);
}
return SkSpecialImage::MakeFromGpu(input->internal_getProxy(),
SkIRect::MakeWH(rect.width(), rect.height()),
kNeedNewImageUniqueID_SpecialImage,
srcTexture, &input->props());
}
