b11ab578ad
The distinction between SkJumper and SkRasterPipeline used to be important, but it's no longer. This CL moves everything under src/jumper to the appropriate SkRasterPipeline file. Change-Id: I1181fffafccb3dc4c4eb5f33b442c719ee370462 Reviewed-on: https://skia-review.googlesource.com/c/164627 Reviewed-by: Mike Klein <mtklein@google.com> Commit-Queue: Mike Klein <mtklein@google.com>
79 lines
2.6 KiB
C++
79 lines
2.6 KiB
C++
/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkColorSpace.h"
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#include "SkRasterPipeline.h"
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#include "Test.h"
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static void check_error(skiatest::Reporter* r, float limit, SkColorSpaceTransferFn fn) {
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float in[256], out[256];
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for (int i = 0; i < 256; i++) {
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in [i] = i / 255.0f;
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out[i] = 0.0f; // Not likely important. Just being tidy.
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}
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SkRasterPipeline_MemoryCtx ip = { in, 0},
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op = {out, 0};
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SkRasterPipeline_<256> p;
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p.append(SkRasterPipeline::load_f32, &ip);
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p.append(SkRasterPipeline::parametric, &fn);
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p.append(SkRasterPipeline::store_f32, &op);
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p.run(0,0, 256/4,1);
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for (int i = 0; i < 256; i++) {
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float want = (in[i] <= fn.fD) ? fn.fC * in[i] + fn.fF
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: powf(in[i] * fn.fA + fn.fB, fn.fG) + fn.fE;
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if (i % 4 == 3) { // alpha should stay unchanged.
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want = in[i];
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}
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float err = fabsf(out[i] - want);
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if (err > limit) {
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ERRORF(r, "At %d, error was %g (got %g, want %g)", i, err, out[i], want);
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}
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}
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}
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static void check_error(skiatest::Reporter* r, float limit, float gamma) {
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SkColorSpaceTransferFn fn = {0,0,0,0,0,0,0};
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fn.fG = gamma;
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fn.fA = 1;
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check_error(r, limit, fn);
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}
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DEF_TEST(Parametric_sRGB, r) {
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// Test our good buddy the sRGB transfer function in resplendent 7-parameter glory.
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check_error(r, 1/510.0f, {
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2.4f,
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1.0f / 1.055f,
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0.055f / 1.055f,
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1.0f / 12.92f,
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0.04045f,
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0.0f,
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0.0f,
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});
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}
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// A nice little spread of simple gammas.
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DEF_TEST(Parametric_1dot0, r) { check_error(r, 1/510.0f, 1.0f); }
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DEF_TEST(Parametric_1dot2, r) { check_error(r, 1/510.0f, 1.2f); }
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DEF_TEST(Parametric_1dot4, r) { check_error(r, 1/510.0f, 1.4f); }
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DEF_TEST(Parametric_1dot8, r) { check_error(r, 1/510.0f, 1.8f); }
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DEF_TEST(Parametric_2dot0, r) { check_error(r, 1/510.0f, 2.0f); }
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DEF_TEST(Parametric_2dot2, r) { check_error(r, 1/510.0f, 2.2f); }
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DEF_TEST(Parametric_2dot4, r) { check_error(r, 1/510.0f, 2.4f); }
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DEF_TEST(Parametric_inv_1dot2, r) { check_error(r, 1/510.0f, 1/1.2f); }
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DEF_TEST(Parametric_inv_1dot4, r) { check_error(r, 1/510.0f, 1/1.4f); }
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DEF_TEST(Parametric_inv_1dot8, r) { check_error(r, 1/510.0f, 1/1.8f); }
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DEF_TEST(Parametric_inv_2dot0, r) { check_error(r, 1/510.0f, 1/2.0f); }
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DEF_TEST(Parametric_inv_2dot2, r) { check_error(r, 1/510.0f, 1/2.2f); }
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DEF_TEST(Parametric_inv_2dot4, r) { check_error(r, 1/510.0f, 1/2.4f); }
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