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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "skia/ext/skia_utils_base.h"
#include <stdint.h>
#include "base/pickle.h"
#include "base/strings/stringprintf.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkColorSpace.h"
#include "third_party/skia/include/core/SkData.h"
#include "third_party/skia/include/core/SkImage.h"
#include "third_party/skia/include/core/SkImageInfo.h"
#include "third_party/skia/include/core/SkSerialProcs.h"
#include "third_party/skia/modules/skcms/skcms.h"
namespace skia {
bool ReadSkString(base::PickleIterator* iter, SkString* str) {
size_t reply_length;
const char* reply_text;
if (!iter->ReadData(&reply_text, &reply_length))
return false;
if (str)
str->set(reply_text, reply_length);
return true;
}
bool ReadSkFontIdentity(base::PickleIterator* iter,
SkFontConfigInterface::FontIdentity* identity) {
uint32_t reply_id;
uint32_t reply_ttcIndex;
size_t reply_length;
const char* reply_text;
if (!iter->ReadUInt32(&reply_id) ||
!iter->ReadUInt32(&reply_ttcIndex) ||
!iter->ReadData(&reply_text, &reply_length))
return false;
if (identity) {
identity->fID = reply_id;
identity->fTTCIndex = reply_ttcIndex;
identity->fString.set(reply_text, reply_length);
}
return true;
}
bool ReadSkFontStyle(base::PickleIterator* iter, SkFontStyle* style) {
uint16_t reply_weight;
uint16_t reply_width;
uint16_t reply_slant;
if (!iter->ReadUInt16(&reply_weight) ||
!iter->ReadUInt16(&reply_width) ||
!iter->ReadUInt16(&reply_slant))
return false;
if (style) {
*style = SkFontStyle(reply_weight,
reply_width,
static_cast<SkFontStyle::Slant>(reply_slant));
}
return true;
}
void WriteSkString(base::Pickle* pickle, const SkString& str) {
pickle->WriteData(str.c_str(), str.size());
}
void WriteSkFontIdentity(base::Pickle* pickle,
const SkFontConfigInterface::FontIdentity& identity) {
pickle->WriteUInt32(identity.fID);
pickle->WriteUInt32(identity.fTTCIndex);
WriteSkString(pickle, identity.fString);
}
void WriteSkFontStyle(base::Pickle* pickle, SkFontStyle style) {
pickle->WriteUInt16(style.weight());
pickle->WriteUInt16(style.width());
pickle->WriteUInt16(style.slant());
}
bool SkBitmapToN32OpaqueOrPremul(const SkBitmap& in, SkBitmap* out) {
DCHECK(out);
if (in.colorType() == kUnknown_SkColorType &&
in.alphaType() == kUnknown_SkAlphaType && in.empty() && in.isNull()) {
// Default-initialized bitmaps convert to the same.
*out = SkBitmap();
return true;
}
const SkImageInfo& info = in.info();
const bool stride_matches_width = in.rowBytes() == info.minRowBytes();
if (stride_matches_width && info.colorType() == kN32_SkColorType &&
(info.alphaType() == kPremul_SkAlphaType ||
info.alphaType() == kOpaque_SkAlphaType)) {
// Shallow copy if the data is already in the right format.
*out = in;
return true;
}
SkImageInfo new_info =
info.makeColorType(kN32_SkColorType)
.makeAlphaType(info.alphaType() == kOpaque_SkAlphaType
? kOpaque_SkAlphaType
: kPremul_SkAlphaType);
if (!out->tryAllocPixels(new_info, 0)) {
return false;
}
if (!in.readPixels(out->pixmap())) {
return false;
}
return true;
}
std::string SkColorToHexString(SkColor color) {
if (SkColorGetA(color) == 0xFF) {
return base::StringPrintf("#%02X%02X%02X", SkColorGetR(color),
SkColorGetG(color), SkColorGetB(color));
} else {
return base::StringPrintf("#%02X%02X%02X%02X", SkColorGetR(color),
SkColorGetG(color), SkColorGetB(color),
SkColorGetA(color));
}
}
std::string SkColorSpaceToString(const SkColorSpace* cs) {
if (!cs) {
return "null";
}
skcms_TransferFunction trfn;
skcms_Matrix3x3 to_xyzd50;
cs->toXYZD50(&to_xyzd50);
cs->transferFn(&trfn);
return base::StringPrintf("{trfn:%s, toXYZD50:%s}",
SkcmsTransferFunctionToString(trfn).c_str(),
SkcmsMatrix3x3ToString(to_xyzd50).c_str());
}
std::string SkcmsTransferFunctionToString(const skcms_TransferFunction& fn) {
return base::StringPrintf(
"{%1.4f*x + %1.4f if abs(x) < %1.4f else "
"sign(x)*((%1.4f*abs(x) + %1.4f)**%1.4f + %1.4f)}",
fn.c, fn.f, fn.d, fn.a, fn.b, fn.g, fn.e);
}
std::string SkcmsMatrix3x3ToString(const skcms_Matrix3x3& m) {
return base::StringPrintf(
"{rows:[[%1.4f,%1.4f,%1.4f],[%1.4f,%1.4f,%1.4f],[%1.4f,%1.4f,%1.4f]]}",
m.vals[0][0], m.vals[0][1], m.vals[0][2], m.vals[1][0], m.vals[1][1],
m.vals[1][2], m.vals[2][0], m.vals[2][1], m.vals[2][2]);
}
base::span<const uint8_t> as_byte_span(const SkData& sk_data LIFETIME_BOUND) {
// SAFETY: `data` is not null. `bytes` and `size` come from the same
// container. (`base::as_bytes_span` doesn't work because `data` accessor
// returns `void*`.)
return UNSAFE_BUFFERS(base::span(sk_data.bytes(), sk_data.size()));
}
} // namespace skia
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