SkImageInfo GrSurface::info(SkAlphaType alphaType) const {
SkColorType colorType;
SkColorProfileType profileType;
if (!GrPixelConfig2ColorAndProfileType(this->config(), &colorType, &profileType)) {
sk_throw();
}
return SkImageInfo::Make(this->width(), this->height(), colorType, alphaType,
profileType);
}
SkImageInfo GrMakeInfoFromTexture(GrTexture* tex, int w, int h, bool isOpaque) {
#ifdef SK_DEBUG
const GrSurfaceDesc& desc = tex->desc();
SkASSERT(w <= desc.fWidth);
SkASSERT(h <= desc.fHeight);
#endif
const GrPixelConfig config = tex->config();
SkColorType ct;
SkAlphaType at = isOpaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType;
if (!GrPixelConfig2ColorAndProfileType(config, &ct, nullptr)) {
ct = kUnknown_SkColorType;
}
return SkImageInfo::Make(w, h, ct, at);
}
SkImageGenerator* SkImageGeneratorUtils::NewFromTexture(GrContext* ctx, GrTexture* tex) {
#if SK_SUPPORT_GPU
if (ctx && tex) {
const GrSurfaceDesc desc = tex->desc();
SkColorType ct;
SkColorProfileType cpt;
if (!GrPixelConfig2ColorAndProfileType(desc.fConfig, &ct, &cpt)) {
return nullptr;
}
const SkAlphaType at = kPremul_SkAlphaType; // take isOpaque from caller?
SkImageInfo info = SkImageInfo::Make(desc.fWidth, desc.fHeight, ct, at, cpt);
return new GeneratorFromTexture(ctx, tex, info);
}
#endif
return nullptr;
}
