1 // Copyright 2019 The PDFium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "core/fxge/dib/cfx_cmyk_to_srgb.h"
6
7 #include "testing/gtest/include/gtest/gtest.h"
8
9 union Float_t {
Float_t(float num=0.0f)10 Float_t(float num = 0.0f) : f(num) {}
11
12 int32_t i;
13 float f;
14 };
15
TEST(fxge,CMYK_Rounding)16 TEST(fxge, CMYK_Rounding) {
17 // Testing all floats from 0.0 to 1.0 takes about 35 seconds in release
18 // builds and much longer in debug builds, so just test the known-dangerous
19 // range.
20 constexpr float kStartValue = 0.001f;
21 constexpr float kEndValue = 0.003f;
22 float R = 0.0f;
23 float G = 0.0f;
24 float B = 0.0f;
25 // Iterate through floats by incrementing the representation, as discussed in
26 // https://randomascii.wordpress.com/2012/01/23/stupid-float-tricks-2/
27 for (Float_t f = kStartValue; f.f < kEndValue; f.i++) {
28 std::tie(R, G, B) = AdobeCMYK_to_sRGB(f.f, f.f, f.f, f.f);
29 }
30 // Check various other 'special' numbers.
31 std::tie(R, G, B) = AdobeCMYK_to_sRGB(0.0f, 0.25f, 0.5f, 1.0f);
32 }
33