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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"
namespace jxl {
namespace {
class PatchDictionaryStage : public RenderPipelineStage {
public:
PatchDictionaryStage(const PatchDictionary* patches, size_t num_channels)
: RenderPipelineStage(RenderPipelineStage::Settings()),
patches_(*patches),
num_channels_(num_channels) {}
void 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 {
PROFILER_ZONE("RenderPatches");
JXL_ASSERT(xpos == 0 || xpos >= xextra);
size_t x0 = xpos ? xpos - xextra : 0;
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;
}
patches_.AddOneRow(row_ptrs.data(), ypos, x0, xsize + xextra + xpos - x0);
}
RenderPipelineChannelMode GetChannelMode(size_t c) const final {
return c < num_channels_ ? RenderPipelineChannelMode::kInPlace
: RenderPipelineChannelMode::kIgnored;
}
const char* GetName() const override { return "Patches"; }
private:
const PatchDictionary& patches_;
const size_t num_channels_;
};
} // namespace
std::unique_ptr<RenderPipelineStage> GetPatchesStage(
const PatchDictionary* patches, size_t num_channels) {
return jxl::make_unique<PatchDictionaryStage>(patches, num_channels);
}
} // namespace jxl
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