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Diffstat (limited to '')
-rw-r--r-- | third_party/jpeg-xl/lib/jxl/render_pipeline/stage_tone_mapping.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/third_party/jpeg-xl/lib/jxl/render_pipeline/stage_tone_mapping.h b/third_party/jpeg-xl/lib/jxl/render_pipeline/stage_tone_mapping.h new file mode 100644 index 0000000000..99824f8511 --- /dev/null +++ b/third_party/jpeg-xl/lib/jxl/render_pipeline/stage_tone_mapping.h @@ -0,0 +1,37 @@ +// 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_STAGE_TONE_MAPPING_H_ +#define LIB_JXL_RENDER_PIPELINE_STAGE_TONE_MAPPING_H_ +#include <math.h> +#include <stdint.h> +#include <stdio.h> + +#include <algorithm> +#include <utility> +#include <vector> + +#include "lib/jxl/dec_xyb.h" +#include "lib/jxl/render_pipeline/render_pipeline_stage.h" + +namespace jxl { + +// Tone maps the image if appropriate. It must be in linear space and +// `output_encoding_info.luminances` must contain the luminance for the +// primaries of that space. It must also be encoded such that (1, 1, 1) +// represents `output_encoding_info.orig_intensity_target` nits, unless +// `output_encoding_info.color_encoding.tf.IsPQ()`, in which case (1, 1, 1) must +// represent 10000 nits. This corresponds to what XYBStage outputs. After this +// stage, (1, 1, 1) will represent +// `output_encoding_info.desired_intensity_target` nits, except in the PQ +// special case in which it remains 10000. +// +// If no tone mapping is necessary, this will return nullptr. +std::unique_ptr<RenderPipelineStage> GetToneMappingStage( + const OutputEncodingInfo& output_encoding_info); + +} // namespace jxl + +#endif // LIB_JXL_RENDER_PIPELINE_STAGE_TONE_MAPPING_H_ |