GCC Code Coverage Report

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libs/imgui/src/eu/imgui/scurve.cc
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1 #include "eu/imgui/scurve.h"
2
3 #include "eu/assert/assert.h"
4 #include "eu/base/cint.h"
5
6 #include "eu/imgui/ui.h"
7
8 #include "dear_imgui/imgui.h"
9
10 #include <cmath>
11
12 #include "eu/core/scurve.h"
13
14 namespace eu::imgui
15 {
16
17 ✗ SCurveGuiState::SCurveGuiState(float x, float y)
18 ✗ : drag(x, y)
19 {
20 ✗ }
21
22 ✗ SCurveGuiState SCurveGuiState::light_curve()
23 {
24 ✗ return {0.2f, 0.0f};
25 }
26
27 ✗ bool imgui_s_curve_editor(const char* title, core::SCurve* curve, SCurveGuiState* gui, FlipX flip_x, const SCurveImguiSettings& settings, bool force_init_curve)
28 {
29
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 ✗ imgui_text(fmt::format("{} ({} {})", title, curve->slope, curve->threshold));
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 ✗ if (ImGui::BeginChild(title, settings.widget_size, settings.widget_border ? ImGuiChildFlags_Borders : ImGuiChildFlags_None, ImGuiWindowFlags_NoScrollbar | ImGuiWindowFlags_NoMove)
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 ✗ == false)
32 {
33
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 ✗ ImGui::EndChild();
34 ✗ return false;
35 }
36
37 ✗ auto& points = gui->point_cache;
38
39 ✗ bool changed = false;
40
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 ✗ const auto widget_position = ImGui::GetWindowPos();
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 ✗ const auto widget_size = ImGui::GetWindowSize();
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 ✗ auto* draw = ImGui::GetWindowDrawList();
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 ✗ draw->AddRectFilled(widget_position, widget_position + widget_size, settings.background_color);
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47
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 ✗ if (points.max_size() != settings.num_points)
49 {
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 ✗ points.resize(settings.num_points);
51 }
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 ✗ for (std::size_t point_index = 0; point_index < settings.num_points; point_index += 1)
53 {
54 ✗ const float srcx = static_cast<float>(point_index) / static_cast<float>(settings.num_points - 1); // -1 here to include 1.0f when evaluating the curve
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 ✗ const float x = flip_x == FlipX::yes? 1 - srcx : srcx;
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 ✗ const float y = core::calculate_s_curve(srcx, curve->slope, curve->threshold);
57 ✗ points[point_index] = ImVec2{x * widget_size.x, (1 - y) * widget_size.y} + widget_position;
58 }
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 ✗ draw->AddPolyline(points.data(), int_from_sizet(settings.num_points), settings.line_color, ImDrawFlags_None, 1.0f);
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 ✗ if (settings.draw_points)
62 {
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 ✗ for (std::size_t point_index = 0; point_index < settings.num_points; point_index += 1)
64 {
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 ✗ draw->AddCircleFilled(points[point_index], settings.point_radius, settings.point_color);
66 }
67 }
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 ✗ draw->AddCircleFilled(ImVec2{gui->drag.x * widget_size.x, (1 - gui->drag.y) * widget_size.y} + widget_position, settings.drag_radius, settings.drag_color);
69
70 ✗ const auto t01 = [&widget_position, &widget_size](const ImVec2& mp)
71 {
72 ✗ const auto x = (mp.x - widget_position.x) / widget_size.x;
73 ✗ const auto y = 1 - ((mp.y - widget_position.y) / widget_size.y);
74 ✗ return ImVec2{x, y};
75 ✗ };
76
77 ✗ const auto within01 = [](const ImVec2& p)
78 {
79 #define T(s) \
80 do \
81 { \
82 if ((s) < 0.0f || (s) > 1.0f) \
83 return false; \
84 } while (false)
85
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 ✗ T(p.x);
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 ✗ T(p.y);
87 ✗ return true;
88 #undef T
89 };
90
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 ✗ if (ImGui::IsMouseDown(settings.button) && within01(t01(ImGui::GetIO().MouseClickedPos[settings.button])))
92 {
93 // mouse is down and drag started inside the component
94
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 ✗ const auto mp = ImGui::GetMousePos();
95 ✗ const auto n = t01(mp);
96 ✗ gui->drag.x = std::min(1.0f, std::max(n.x, 0.0f));
97 ✗ gui->drag.y = std::min(1.0f, std::max(n.y, 0.0f));
98 ✗ changed = true;
99 }
100
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 ✗ if (changed || force_init_curve)
102 {
103
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 ✗ *curve = core::s_curve_from_input(flip_x == FlipX::yes ? 1 - gui->drag.x : gui->drag.x, gui->drag.y);
104 }
105
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 ✗ ImGui::EndChild();
107
108 ✗ return changed;
109 }
110
111 } // namespace eu::imgui_extra
112