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// 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/render_pipeline/stage_patches.h"
#include <cstddef>
#include <memory>
#include <vector>
#include "lib/jxl/dec_patch_dictionary.h"
#include "lib/jxl/render_pipeline/render_pipeline_stage.h"
namespace jxl {
namespace {
class PatchDictionaryStage : public RenderPipelineStage {
public:
PatchDictionaryStage(const PatchDictionary* patches,
const std::vector<ExtraChannelInfo>* extra_channel_info)
: RenderPipelineStage(RenderPipelineStage::Settings()),
patches_(*patches),
extra_channel_info_(extra_channel_info) {}
Status ProcessRow(const RowInfo& input_rows, const RowInfo& output_rows,
size_t xextra, size_t xsize, size_t xpos, size_t ypos,
size_t thread_id) const final {
JXL_ENSURE(xpos == 0 || xpos >= xextra);
size_t x0 = xpos ? xpos - xextra : 0;
size_t num_channels = 3 + extra_channel_info_->size();
std::vector<float*> row_ptrs(num_channels);
for (size_t i = 0; i < num_channels; i++) {
row_ptrs[i] = GetInputRow(input_rows, i, 0) + x0 - xpos;
}
return patches_.AddOneRow(row_ptrs.data(), ypos, x0,
xsize + xextra + xpos - x0, *extra_channel_info_);
}
RenderPipelineChannelMode GetChannelMode(size_t c) const final {
size_t num_channels = 3 + extra_channel_info_->size();
return c < num_channels ? RenderPipelineChannelMode::kInPlace
: RenderPipelineChannelMode::kIgnored;
}
const char* GetName() const override { return "Patches"; }
private:
const PatchDictionary& patches_;
const std::vector<ExtraChannelInfo>* extra_channel_info_;
};
} // namespace
std::unique_ptr<RenderPipelineStage> GetPatchesStage(
const PatchDictionary* patches,
const std::vector<ExtraChannelInfo>* extra_channel_info) {
return jxl::make_unique<PatchDictionaryStage>(patches, extra_channel_info);
}
} // namespace jxl