diff options
Diffstat (limited to 'third_party/jpeg-xl/lib/jxl/enc_image_bundle.cc')
| -rw-r--r-- | third_party/jpeg-xl/lib/jxl/enc_image_bundle.cc | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/third_party/jpeg-xl/lib/jxl/enc_image_bundle.cc b/third_party/jpeg-xl/lib/jxl/enc_image_bundle.cc new file mode 100644 index 0000000000..a77d3e0743 --- /dev/null +++ b/third_party/jpeg-xl/lib/jxl/enc_image_bundle.cc @@ -0,0 +1,154 @@ +// Copyright (c) the JPEG XL Project Authors. All rights reserved. +// +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +#include "lib/jxl/enc_image_bundle.h" + +#include <jxl/cms_interface.h> + +#include <atomic> +#include <limits> +#include <utility> + +#include "lib/jxl/alpha.h" +#include "lib/jxl/base/byte_order.h" +#include "lib/jxl/base/padded_bytes.h" +#include "lib/jxl/base/profiler.h" +#include "lib/jxl/enc_color_management.h" +#include "lib/jxl/fields.h" +#include "lib/jxl/image_bundle.h" + +namespace jxl { + +namespace { + +// Copies ib:rect, converts, and copies into out. +Status CopyToT(const ImageMetadata* metadata, const ImageBundle* ib, + const Rect& rect, const ColorEncoding& c_desired, + const JxlCmsInterface& cms, ThreadPool* pool, Image3F* out) { + PROFILER_FUNC; + ColorSpaceTransform c_transform(cms); + // Changing IsGray is probably a bug. + JXL_CHECK(ib->IsGray() == c_desired.IsGray()); + bool is_gray = ib->IsGray(); + if (out->xsize() < rect.xsize() || out->ysize() < rect.ysize()) { + *out = Image3F(rect.xsize(), rect.ysize()); + } else { + out->ShrinkTo(rect.xsize(), rect.ysize()); + } + std::atomic<bool> ok{true}; + JXL_RETURN_IF_ERROR(RunOnPool( + pool, 0, rect.ysize(), + [&](const size_t num_threads) { + return c_transform.Init(ib->c_current(), c_desired, + metadata->IntensityTarget(), rect.xsize(), + num_threads); + }, + [&](const uint32_t y, const size_t thread) { + float* mutable_src_buf = c_transform.BufSrc(thread); + const float* src_buf = mutable_src_buf; + // Interleave input. + if (is_gray) { + src_buf = rect.ConstPlaneRow(ib->color(), 0, y); + } else if (ib->c_current().IsCMYK()) { + if (!ib->HasBlack()) { + ok.store(false); + return; + } + const float* JXL_RESTRICT row_in0 = + rect.ConstPlaneRow(ib->color(), 0, y); + const float* JXL_RESTRICT row_in1 = + rect.ConstPlaneRow(ib->color(), 1, y); + const float* JXL_RESTRICT row_in2 = + rect.ConstPlaneRow(ib->color(), 2, y); + const float* JXL_RESTRICT row_in3 = rect.ConstRow(ib->black(), y); + for (size_t x = 0; x < rect.xsize(); x++) { + // CMYK convention in JXL: 0 = max ink, 1 = white + mutable_src_buf[4 * x + 0] = row_in0[x]; + mutable_src_buf[4 * x + 1] = row_in1[x]; + mutable_src_buf[4 * x + 2] = row_in2[x]; + mutable_src_buf[4 * x + 3] = row_in3[x]; + } + } else { + const float* JXL_RESTRICT row_in0 = + rect.ConstPlaneRow(ib->color(), 0, y); + const float* JXL_RESTRICT row_in1 = + rect.ConstPlaneRow(ib->color(), 1, y); + const float* JXL_RESTRICT row_in2 = + rect.ConstPlaneRow(ib->color(), 2, y); + for (size_t x = 0; x < rect.xsize(); x++) { + mutable_src_buf[3 * x + 0] = row_in0[x]; + mutable_src_buf[3 * x + 1] = row_in1[x]; + mutable_src_buf[3 * x + 2] = row_in2[x]; + } + } + float* JXL_RESTRICT dst_buf = c_transform.BufDst(thread); + if (!c_transform.Run(thread, src_buf, dst_buf)) { + ok.store(false); + return; + } + float* JXL_RESTRICT row_out0 = out->PlaneRow(0, y); + float* JXL_RESTRICT row_out1 = out->PlaneRow(1, y); + float* JXL_RESTRICT row_out2 = out->PlaneRow(2, y); + // De-interleave output and convert type. + if (is_gray) { + for (size_t x = 0; x < rect.xsize(); x++) { + row_out0[x] = dst_buf[x]; + row_out1[x] = dst_buf[x]; + row_out2[x] = dst_buf[x]; + } + } else { + for (size_t x = 0; x < rect.xsize(); x++) { + row_out0[x] = dst_buf[3 * x + 0]; + row_out1[x] = dst_buf[3 * x + 1]; + row_out2[x] = dst_buf[3 * x + 2]; + } + } + }, + "Colorspace transform")); + return ok.load(); +} + +} // namespace + +Status ImageBundle::TransformTo(const ColorEncoding& c_desired, + const JxlCmsInterface& cms, ThreadPool* pool) { + PROFILER_FUNC; + JXL_RETURN_IF_ERROR(CopyTo(Rect(color_), c_desired, cms, &color_, pool)); + c_current_ = c_desired; + return true; +} +Status ImageBundle::CopyTo(const Rect& rect, const ColorEncoding& c_desired, + const JxlCmsInterface& cms, Image3F* out, + ThreadPool* pool) const { + return CopyToT(metadata_, this, rect, c_desired, cms, pool, out); +} +Status TransformIfNeeded(const ImageBundle& in, const ColorEncoding& c_desired, + const JxlCmsInterface& cms, ThreadPool* pool, + ImageBundle* store, const ImageBundle** out) { + if (in.c_current().SameColorEncoding(c_desired) && !in.HasBlack()) { + *out = ∈ + return true; + } + // TODO(janwas): avoid copying via createExternal+copyBackToIO + // instead of copy+createExternal+copyBackToIO + store->SetFromImage(CopyImage(in.color()), in.c_current()); + + // Must at least copy the alpha channel for use by external_image. + if (in.HasExtraChannels()) { + std::vector<ImageF> extra_channels; + for (const ImageF& extra_channel : in.extra_channels()) { + extra_channels.emplace_back(CopyImage(extra_channel)); + } + store->SetExtraChannels(std::move(extra_channels)); + } + + if (!store->TransformTo(c_desired, cms, pool)) { + return false; + } + *out = store; + return true; +} + +} // namespace jxl |