sk_sp<GrTextureProxy> GrTextureProducer::refTextureProxyForParams(
const GrSamplerState& sampler,
SkColorSpace* dstColorSpace,
sk_sp<SkColorSpace>* proxyColorSpace,
SkScalar scaleAdjust[2]) {
// Check that the caller pre-initialized scaleAdjust
SkASSERT(!scaleAdjust || (scaleAdjust[0] == 1 && scaleAdjust[1] == 1));
// Check that if the caller passed nullptr for scaleAdjust that we're in the case where there
// can be no scaling.
SkDEBUGCODE(bool expectNoScale = (sampler.filter() != GrSamplerState::Filter::kMipMap &&
!sampler.isRepeated()));
SkASSERT(scaleAdjust || expectNoScale);
int mipCount = SkMipMap::ComputeLevelCount(this->width(), this->height());
bool willBeMipped = GrSamplerState::Filter::kMipMap == sampler.filter() && mipCount &&
fContext->contextPriv().caps()->mipMapSupport();
auto result =
this->onRefTextureProxyForParams(sampler, dstColorSpace, proxyColorSpace, willBeMipped,
scaleAdjust);
// Check to make sure that if we say the texture willBeMipped that the returned texture has mip
// maps, unless the config is not copyable.
SkASSERT(!result || !willBeMipped || result->mipMapped() == GrMipMapped::kYes ||
!fContext->contextPriv().caps()->isConfigCopyable(result->config()));
// Check that the "no scaling expected" case always returns a proxy of the same size as the
// producer.
SkASSERT(!result || !expectNoScale ||
(result->width() == this->width() && result->height() == this->height()));
return result;
}
bool GrGpu::IsACopyNeededForTextureParams(const GrCaps* caps, GrTextureProxy* texProxy,
int width, int height,
const GrSamplerState& textureParams,
GrTextureProducer::CopyParams* copyParams,
SkScalar scaleAdjust[2]) {
if (texProxy) {
// If the texture format itself doesn't support repeat wrap mode or mipmapping (and
// those capabilities are required) force a copy.
if ((textureParams.isRepeated() && texProxy->texPriv().isClampOnly()) ||
(GrSamplerState::Filter::kMipMap == textureParams.filter() &&
texProxy->texPriv().doesNotSupportMipMaps())) {
copyParams->fFilter = GrSamplerState::Filter::kNearest;
copyParams->fWidth = texProxy->width();
copyParams->fHeight = texProxy->height();
return true;
}
}
if (textureParams.isRepeated() && !caps->npotTextureTileSupport() &&
(!SkIsPow2(width) || !SkIsPow2(height))) {
SkASSERT(scaleAdjust);
copyParams->fWidth = GrNextPow2(width);
copyParams->fHeight = GrNextPow2(height);
SkASSERT(scaleAdjust);
scaleAdjust[0] = ((SkScalar) copyParams->fWidth) / width;
scaleAdjust[1] = ((SkScalar) copyParams->fHeight) / height;
switch (textureParams.filter()) {
case GrSamplerState::Filter::kNearest:
copyParams->fFilter = GrSamplerState::Filter::kNearest;
break;
case GrSamplerState::Filter::kBilerp:
case GrSamplerState::Filter::kMipMap:
// We are only ever scaling up so no reason to ever indicate kMipMap.
copyParams->fFilter = GrSamplerState::Filter::kBilerp;
break;
}
return true;
}
return false;
}