From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 19:32:43 +0200
Subject: Adding upstream version 1:115.7.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../render_pipeline/low_memory_render_pipeline.h   | 111 +++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 third_party/jpeg-xl/lib/jxl/render_pipeline/low_memory_render_pipeline.h

(limited to 'third_party/jpeg-xl/lib/jxl/render_pipeline/low_memory_render_pipeline.h')

diff --git a/third_party/jpeg-xl/lib/jxl/render_pipeline/low_memory_render_pipeline.h b/third_party/jpeg-xl/lib/jxl/render_pipeline/low_memory_render_pipeline.h
new file mode 100644
index 0000000000..b386f7c078
--- /dev/null
+++ b/third_party/jpeg-xl/lib/jxl/render_pipeline/low_memory_render_pipeline.h
@@ -0,0 +1,111 @@
+// 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.
+
+#ifndef LIB_JXL_RENDER_PIPELINE_LOW_MEMORY_RENDER_PIPELINE_H_
+#define LIB_JXL_RENDER_PIPELINE_LOW_MEMORY_RENDER_PIPELINE_H_
+
+#include <stdint.h>
+
+#include "lib/jxl/dec_group_border.h"
+#include "lib/jxl/render_pipeline/render_pipeline.h"
+
+namespace jxl {
+
+// A multithreaded, low-memory rendering pipeline that only allocates a minimal
+// amount of buffers.
+class LowMemoryRenderPipeline final : public RenderPipeline {
+ private:
+  std::vector<std::pair<ImageF*, Rect>> PrepareBuffers(
+      size_t group_id, size_t thread_id) override;
+
+  void PrepareForThreadsInternal(size_t num, bool use_group_ids) override;
+
+  void ProcessBuffers(size_t group_id, size_t thread_id) override;
+
+  void ClearDone(size_t i) override { group_border_assigner_.ClearDone(i); }
+
+  void Init() override;
+
+  void EnsureBordersStorage();
+  size_t GroupInputXSize(size_t c) const;
+  size_t GroupInputYSize(size_t c) const;
+  void RenderRect(size_t thread_id, std::vector<ImageF>& input_data,
+                  Rect data_max_color_channel_rect,
+                  Rect image_max_color_channel_rect);
+  void RenderPadding(size_t thread_id, Rect rect);
+
+  void SaveBorders(size_t group_id, size_t c, const ImageF& in);
+  void LoadBorders(size_t group_id, size_t c, const Rect& r, ImageF* out);
+
+  std::pair<size_t, size_t> ColorDimensionsToChannelDimensions(
+      std::pair<size_t, size_t> in, size_t c, size_t stage) const;
+
+  std::pair<size_t, size_t> BorderToStore(size_t c) const;
+
+  bool use_group_ids_;
+
+  // Storage for borders between groups. Borders of adjacent groups are stacked
+  // together, e.g. bottom border of current group is followed by top border
+  // of next group.
+  std::vector<ImageF> borders_horizontal_;
+  std::vector<ImageF> borders_vertical_;
+
+  // Manages the status of borders.
+  GroupBorderAssigner group_border_assigner_;
+
+  // Size (in color-channel-pixels) of the border around each group that might
+  // be assigned to that group.
+  std::pair<size_t, size_t> group_border_;
+  // base_color_shift_ defines the size of groups in terms of final image
+  // pixels.
+  size_t base_color_shift_;
+
+  // Buffer for decoded pixel data for a group, indexed by [thread][channel] or
+  // [group][channel] depending on `use_group_ids_`.
+  std::vector<std::vector<ImageF>> group_data_;
+
+  // Borders for storing group data.
+  size_t group_data_x_border_;
+  size_t group_data_y_border_;
+
+  // Buffers for intermediate rows for the various stages, indexed by
+  // [thread][channel][stage].
+  std::vector<std::vector<std::vector<ImageF>>> stage_data_;
+
+  // Buffers for out-of-frame data, indexed by [thread]; every row is a
+  // different channel.
+  std::vector<ImageF> out_of_frame_data_;
+
+  // For each stage, a non-kIgnored channel.
+  std::vector<int32_t> anyc_;
+
+  // Size of the image at each stage.
+  std::vector<Rect> image_rect_;
+
+  // For each stage, for each channel, keep track of the kInOut stage that
+  // produced the input to that stage (which corresponds to the buffer index
+  // containing the data). -1 if data comes from the original input.
+  std::vector<std::vector<int32_t>> stage_input_for_channel_;
+
+  // Number of (virtual) extra rows that must be processed at each stage
+  // to produce sufficient output for future stages.
+  std::vector<int> virtual_ypadding_for_output_;
+
+  // Same thing for columns, except these are real columns and not virtual ones.
+  std::vector<int> xpadding_for_output_;
+
+  // First stage that doesn't have any kInOut channel.
+  size_t first_trailing_stage_;
+
+  // Origin and size of the frame after switching to image dimensions.
+  FrameOrigin frame_origin_;
+  size_t full_image_xsize_;
+  size_t full_image_ysize_;
+  size_t first_image_dim_stage_;
+};
+
+}  // namespace jxl
+
+#endif  // LIB_JXL_RENDER_PIPELINE_LOW_MEMORY_RENDER_PIPELINE_H_
-- 
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