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1 // Copyright (c) 2016 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "ui/gfx/color_transform.h" | 5 #include "ui/gfx/color_transform.h" |
6 | 6 |
7 #include <vector> | 7 #include <vector> |
8 | 8 |
9 #include "base/logging.h" | 9 #include "base/logging.h" |
10 #include "ui/gfx/color_space.h" | 10 #include "ui/gfx/color_space.h" |
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645 c.custom_primary_matrix_[4], c.custom_primary_matrix_[5], | 645 c.custom_primary_matrix_[4], c.custom_primary_matrix_[5], |
646 c.custom_primary_matrix_[6], c.custom_primary_matrix_[7], | 646 c.custom_primary_matrix_[6], c.custom_primary_matrix_[7], |
647 c.custom_primary_matrix_[8], c.custom_primary_matrix_[9], | 647 c.custom_primary_matrix_[8], c.custom_primary_matrix_[9], |
648 c.custom_primary_matrix_[10], | 648 c.custom_primary_matrix_[10], |
649 c.custom_primary_matrix_[11], 0.0f, 0.0f, 0.0f, 1.0f); | 649 c.custom_primary_matrix_[11], 0.0f, 0.0f, 0.0f, 1.0f); |
650 } else { | 650 } else { |
651 return GetPrimaryMatrix(c.primaries_); | 651 return GetPrimaryMatrix(c.primaries_); |
652 } | 652 } |
653 } | 653 } |
654 | 654 |
655 void transform(TriStim* colors, size_t num) override { | 655 void transform(TriStim* colors, size_t num) const override { |
656 for (size_t i = 0; i < num; i++) { | 656 for (size_t i = 0; i < num; i++) { |
657 TriStim c = colors[i]; | 657 TriStim c = colors[i]; |
658 a_.TransformPoint(&c); | 658 a_.TransformPoint(&c); |
659 c = ToLinear(from_.transfer_, c); | 659 c = ToLinear(from_.transfer_, c); |
660 b_.TransformPoint(&c); | 660 b_.TransformPoint(&c); |
661 c.set_x(FromLinear(to_.transfer_, c.x())); | 661 c.set_x(FromLinear(to_.transfer_, c.x())); |
662 c.set_y(FromLinear(to_.transfer_, c.y())); | 662 c.set_y(FromLinear(to_.transfer_, c.y())); |
663 c.set_z(FromLinear(to_.transfer_, c.z())); | 663 c.set_z(FromLinear(to_.transfer_, c.z())); |
664 c_.TransformPoint(&c); | 664 c_.TransformPoint(&c); |
665 colors[i] = c; | 665 colors[i] = c; |
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678 | 678 |
679 class QCMSColorTransform : public ColorTransform { | 679 class QCMSColorTransform : public ColorTransform { |
680 public: | 680 public: |
681 // Takes ownership of the profiles | 681 // Takes ownership of the profiles |
682 QCMSColorTransform(qcms_profile* from, qcms_profile* to) | 682 QCMSColorTransform(qcms_profile* from, qcms_profile* to) |
683 : from_(from), to_(to) {} | 683 : from_(from), to_(to) {} |
684 ~QCMSColorTransform() override { | 684 ~QCMSColorTransform() override { |
685 qcms_profile_release(from_); | 685 qcms_profile_release(from_); |
686 qcms_profile_release(to_); | 686 qcms_profile_release(to_); |
687 } | 687 } |
688 void transform(TriStim* colors, size_t num) override { | 688 void transform(TriStim* colors, size_t num) const override { |
689 CHECK(sizeof(TriStim) == sizeof(float[3])); | 689 CHECK(sizeof(TriStim) == sizeof(float[3])); |
690 // QCMS doesn't like numbers outside 0..1 | 690 // QCMS doesn't like numbers outside 0..1 |
691 for (size_t i = 0; i < num; i++) { | 691 for (size_t i = 0; i < num; i++) { |
692 colors[i].set_x(fmin(1.0f, fmax(0.0f, colors[i].x()))); | 692 colors[i].set_x(fmin(1.0f, fmax(0.0f, colors[i].x()))); |
693 colors[i].set_y(fmin(1.0f, fmax(0.0f, colors[i].y()))); | 693 colors[i].set_y(fmin(1.0f, fmax(0.0f, colors[i].y()))); |
694 colors[i].set_z(fmin(1.0f, fmax(0.0f, colors[i].z()))); | 694 colors[i].set_z(fmin(1.0f, fmax(0.0f, colors[i].z()))); |
695 } | 695 } |
696 qcms_chain_transform(from_, to_, reinterpret_cast<float*>(colors), | 696 qcms_chain_transform(from_, to_, reinterpret_cast<float*>(colors), |
697 reinterpret_cast<float*>(colors), num * 3); | 697 reinterpret_cast<float*>(colors), num * 3); |
698 } | 698 } |
699 | 699 |
700 private: | 700 private: |
701 qcms_profile *from_, *to_; | 701 qcms_profile *from_, *to_; |
702 }; | 702 }; |
703 | 703 |
704 class ChainColorTransform : public ColorTransform { | 704 class ChainColorTransform : public ColorTransform { |
705 public: | 705 public: |
706 ChainColorTransform(std::unique_ptr<ColorTransform> a, | 706 ChainColorTransform(std::unique_ptr<ColorTransform> a, |
707 std::unique_ptr<ColorTransform> b) | 707 std::unique_ptr<ColorTransform> b) |
708 : a_(std::move(a)), b_(std::move(b)) {} | 708 : a_(std::move(a)), b_(std::move(b)) {} |
709 | 709 |
710 private: | 710 private: |
711 void transform(TriStim* colors, size_t num) override { | 711 void transform(TriStim* colors, size_t num) const override { |
712 a_->transform(colors, num); | 712 a_->transform(colors, num); |
713 b_->transform(colors, num); | 713 b_->transform(colors, num); |
714 } | 714 } |
715 std::unique_ptr<ColorTransform> a_; | 715 std::unique_ptr<ColorTransform> a_; |
716 std::unique_ptr<ColorTransform> b_; | 716 std::unique_ptr<ColorTransform> b_; |
717 }; | 717 }; |
718 | 718 |
719 qcms_profile* GetQCMSProfileIfAvailable(const ColorSpace& color_space) { | 719 qcms_profile* GetQCMSProfileIfAvailable(const ColorSpace& color_space) { |
720 ICCProfile icc_profile = ICCProfile::FromColorSpace(color_space); | 720 ICCProfile icc_profile = ICCProfile::FromColorSpace(color_space); |
721 if (icc_profile.GetData().empty()) | 721 if (icc_profile.GetData().empty()) |
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769 from, ColorSpace::CreateXYZD50(), intent)), | 769 from, ColorSpace::CreateXYZD50(), intent)), |
770 std::unique_ptr<ColorTransform>( | 770 std::unique_ptr<ColorTransform>( |
771 new QCMSColorTransform(GetXYZD50Profile(), to_profile)))); | 771 new QCMSColorTransform(GetXYZD50Profile(), to_profile)))); |
772 } else { | 772 } else { |
773 return std::unique_ptr<ColorTransform>( | 773 return std::unique_ptr<ColorTransform>( |
774 new ColorSpaceToColorSpaceTransform(from, to, intent)); | 774 new ColorSpaceToColorSpaceTransform(from, to, intent)); |
775 } | 775 } |
776 } | 776 } |
777 } | 777 } |
778 | 778 |
| 779 namespace { |
| 780 |
| 781 float TriStimChannel(const ColorTransform::TriStim& t, int c) { |
| 782 switch (c) { |
| 783 case 0: |
| 784 return t.x(); |
| 785 case 1: |
| 786 return t.y(); |
| 787 case 2: |
| 788 return t.z(); |
| 789 case 3: |
| 790 return 1.0f; |
| 791 default: |
| 792 NOTREACHED(); |
| 793 break; |
| 794 } |
| 795 return 0.0f; |
| 796 }; |
| 797 |
| 798 } // namespace |
| 799 |
| 800 bool ColorTransform::GetAffineApproximation(Transform* transform) const { |
| 801 const int num_points = 4; |
| 802 std::vector<TriStim> input(num_points * num_points * num_points); |
| 803 int i = 0; |
| 804 float offset = 0.1; |
| 805 float mult = 0.8 / num_points; |
| 806 for (int x = 0; x < num_points; x++) { |
| 807 for (int y = 0; y < num_points; y++) { |
| 808 for (int z = 0; z < num_points; z++) { |
| 809 input[i++] = ColorTransform::TriStim( |
| 810 offset + x * mult, offset + y * mult, offset + z * mult); |
| 811 } |
| 812 } |
| 813 } |
| 814 |
| 815 std::vector<TriStim> output(input); |
| 816 this->transform(output.data(), output.size()); |
| 817 SkMatrix44 XtX; |
| 818 for (int x = 0; x < 4; x++) { |
| 819 for (int y = 0; y < 4; y++) { |
| 820 double tmp = 0.0; |
| 821 for (int z = 0; z < num_points * num_points * num_points; z++) { |
| 822 tmp += TriStimChannel(input[z], x) * TriStimChannel(input[z], y); |
| 823 } |
| 824 XtX.setDouble(x, y, tmp); |
| 825 } |
| 826 } |
| 827 |
| 828 SkMatrix44 XtXinv; |
| 829 if (!XtX.invert(&XtXinv)) |
| 830 return false; |
| 831 |
| 832 SkVector4 results[4]; |
| 833 |
| 834 for (int x = 0; x < 4; x++) { |
| 835 double Xty[4]; |
| 836 for (int y = 0; y < 4; y++) { |
| 837 double tmp = 0.0; |
| 838 for (int z = 0; z < num_points * num_points * num_points; z++) { |
| 839 tmp += TriStimChannel(output[z], x) * TriStimChannel(input[z], y); |
| 840 } |
| 841 Xty[y] = tmp; |
| 842 } |
| 843 results[x] = XtXinv * SkVector4(Xty[0], Xty[1], Xty[2], Xty[3]); |
| 844 } |
| 845 |
| 846 *transform = |
| 847 Transform(results[0].fData[0], results[0].fData[1], results[0].fData[2], |
| 848 results[0].fData[3], results[1].fData[0], results[1].fData[1], |
| 849 results[1].fData[2], results[1].fData[3], results[2].fData[0], |
| 850 results[2].fData[1], results[2].fData[2], results[2].fData[3], |
| 851 results[3].fData[0], results[3].fData[1], results[3].fData[2], |
| 852 results[3].fData[3]); |
| 853 return true; |
| 854 } |
| 855 |
779 } // namespace gfx | 856 } // namespace gfx |
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