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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/modular/transform/enc_transform.h"
#include "lib/jxl/modular/transform/enc_palette.h"
#include "lib/jxl/modular/transform/enc_rct.h"
#include "lib/jxl/modular/transform/enc_squeeze.h"
namespace jxl {
Status TransformForward(Transform &t, Image &input,
const weighted::Header &wp_header, ThreadPool *pool) {
switch (t.id) {
case TransformId::kRCT:
return FwdRCT(input, t.begin_c, t.rct_type, pool);
case TransformId::kSqueeze:
return FwdSqueeze(input, t.squeezes, pool);
case TransformId::kPalette:
return FwdPalette(input, t.begin_c, t.begin_c + t.num_c - 1, t.nb_colors,
t.nb_deltas, t.ordered_palette, t.lossy_palette,
t.predictor, wp_header);
default:
return JXL_FAILURE("Unknown transformation (ID=%u)",
static_cast<unsigned int>(t.id));
}
}
void compute_minmax(const Channel &ch, pixel_type *min, pixel_type *max) {
pixel_type realmin = std::numeric_limits<pixel_type>::max();
pixel_type realmax = std::numeric_limits<pixel_type>::min();
for (size_t y = 0; y < ch.h; y++) {
const pixel_type *JXL_RESTRICT p = ch.Row(y);
for (size_t x = 0; x < ch.w; x++) {
if (p[x] < realmin) realmin = p[x];
if (p[x] > realmax) realmax = p[x];
}
}
if (min) *min = realmin;
if (max) *max = realmax;
}
} // namespace jxl
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