Simplify SkCodecs' call to SkColorSpaceXform::apply
Most SkCodec subclasses did the following to apply their
SkColorSpaceXform:
dstFormat = select_xform_format(dstInfo.colorType());
srcFormat = select_xform_format(<something that doesn't change>);
xformAlphaType = select_xform_alpha(dstInfo.alphaType(),
this->getInfo().alphaType());
this->colorXform()->apply(dstFormat, dst, srcFormat, src, width,
xformAlphaType);
Consolidate the computation of these parameters into SkCodec and add a
new method to SkCodec that calls apply() with those parameters.
Add a SkColorSpaceXform::ColorFormat to SkCodec. This allows the new
method SkCodec::applyColorXform to supply the ColorFormat.
TBR=reed@google.com
(No change to public API.)
Change-Id: I8ea7ba4c0024be827a9f9359796c778744330f6e
Reviewed-on: https://skia-review.googlesource.com/18523
Reviewed-by: Leon Scroggins <scroggo@google.com>
Reviewed-by: Matt Sarett <msarett@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
diff --git a/src/codec/SkCodec.cpp b/src/codec/SkCodec.cpp
index 688cfaa..2cae6db 100644
--- a/src/codec/SkCodec.cpp
+++ b/src/codec/SkCodec.cpp
@@ -114,10 +114,12 @@
return NewFromStream(new SkMemoryStream(data), reader);
}
-SkCodec::SkCodec(int width, int height, const SkEncodedInfo& info, SkStream* stream,
+SkCodec::SkCodec(int width, int height, const SkEncodedInfo& info,
+ XformFormat srcFormat, SkStream* stream,
sk_sp<SkColorSpace> colorSpace, Origin origin)
: fEncodedInfo(info)
, fSrcInfo(info.makeImageInfo(width, height, std::move(colorSpace)))
+ , fSrcXformFormat(srcFormat)
, fStream(stream)
, fNeedsRewind(false)
, fOrigin(origin)
@@ -126,10 +128,11 @@
, fCurrScanline(-1)
{}
-SkCodec::SkCodec(const SkEncodedInfo& info, const SkImageInfo& imageInfo, SkStream* stream,
- Origin origin)
+SkCodec::SkCodec(const SkEncodedInfo& info, const SkImageInfo& imageInfo,
+ XformFormat srcFormat, SkStream* stream, Origin origin)
: fEncodedInfo(info)
, fSrcInfo(imageInfo)
+ , fSrcXformFormat(srcFormat)
, fStream(stream)
, fNeedsRewind(false)
, fOrigin(origin)
@@ -474,9 +477,29 @@
}
}
+static inline SkColorSpaceXform::ColorFormat select_xform_format_ct(SkColorType colorType) {
+ switch (colorType) {
+ case kRGBA_8888_SkColorType:
+ return SkColorSpaceXform::kRGBA_8888_ColorFormat;
+ case kBGRA_8888_SkColorType:
+ return SkColorSpaceXform::kBGRA_8888_ColorFormat;
+ case kRGB_565_SkColorType:
+ case kIndex_8_SkColorType:
+#ifdef SK_PMCOLOR_IS_RGBA
+ return SkColorSpaceXform::kRGBA_8888_ColorFormat;
+#else
+ return SkColorSpaceXform::kBGRA_8888_ColorFormat;
+#endif
+ default:
+ SkASSERT(false);
+ return SkColorSpaceXform::kRGBA_8888_ColorFormat;
+ }
+}
+
bool SkCodec::initializeColorXform(const SkImageInfo& dstInfo,
SkTransferFunctionBehavior premulBehavior) {
fColorXform = nullptr;
+ fXformOnDecode = false;
bool needsColorCorrectPremul = needs_premul(dstInfo, fEncodedInfo) &&
SkTransferFunctionBehavior::kRespect == premulBehavior;
if (needs_color_xform(dstInfo, fSrcInfo, needsColorCorrectPremul)) {
@@ -485,13 +508,32 @@
if (!fColorXform) {
return false;
}
- } else {
- fColorXform.reset();
+
+ // We will apply the color xform when reading the color table unless F16 is requested.
+ fXformOnDecode = SkEncodedInfo::kPalette_Color != fEncodedInfo.color()
+ || kRGBA_F16_SkColorType == dstInfo.colorType();
+ if (fXformOnDecode) {
+ fDstXformFormat = select_xform_format(dstInfo.colorType());
+ } else {
+ fDstXformFormat = select_xform_format_ct(dstInfo.colorType());
+ }
}
return true;
}
+void SkCodec::applyColorXform(void* dst, const void* src, int count, SkAlphaType at) const {
+ SkASSERT(fColorXform);
+ SkAssertResult(fColorXform->apply(fDstXformFormat, dst,
+ fSrcXformFormat, src,
+ count, at));
+}
+
+void SkCodec::applyColorXform(void* dst, const void* src, int count) const {
+ auto alphaType = select_xform_alpha(fDstInfo.alphaType(), fSrcInfo.alphaType());
+ this->applyColorXform(dst, src, count, alphaType);
+}
+
std::vector<SkCodec::FrameInfo> SkCodec::getFrameInfo() {
const int frameCount = this->getFrameCount();
SkASSERT(frameCount >= 0);