-
Notifications
You must be signed in to change notification settings - Fork 14
/
imgui_widget_flamegraph.cpp
148 lines (126 loc) · 6.13 KB
/
imgui_widget_flamegraph.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
// The MIT License(MIT)
//
// Copyright(c) 2019 Sandy Carter
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files(the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions :
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#include <imgui_widget_flamegraph.h>
#include "imgui.h"
#include "imgui_internal.h"
void ImGuiWidgetFlameGraph::PlotFlame(const char* label, void (*values_getter)(float* start, float* end, ImU8* level, const char** caption, const void* data, int idx), const void* data, int values_count, int values_offset, const char* overlay_text, float scale_min, float scale_max, ImVec2 graph_size)
{
ImGuiWindow* window = ImGui::GetCurrentWindow();
if (window->SkipItems)
return;
ImGuiContext& g = *GImGui;
const ImGuiStyle& style = g.Style;
// Find the maximum depth
ImU8 maxDepth = 0;
for (int i = values_offset; i < values_count; ++i)
{
ImU8 depth;
values_getter(nullptr, nullptr, &depth, nullptr, data, i);
maxDepth = ImMax(maxDepth, depth);
}
const auto blockHeight = ImGui::GetTextLineHeight() + (style.FramePadding.y * 2);
const ImVec2 label_size = ImGui::CalcTextSize(label, NULL, true);
if (graph_size.x == 0.0f)
graph_size.x = ImGui::CalcItemWidth();
if (graph_size.y == 0.0f)
graph_size.y = label_size.y + (style.FramePadding.y * 3) + blockHeight * (maxDepth + 1);
const ImRect frame_bb(window->DC.CursorPos, window->DC.CursorPos + graph_size);
const ImRect inner_bb(frame_bb.Min + style.FramePadding, frame_bb.Max - style.FramePadding);
const ImRect total_bb(frame_bb.Min, frame_bb.Max + ImVec2(label_size.x > 0.0f ? style.ItemInnerSpacing.x + label_size.x : 0.0f, 0));
ImGui::ItemSize(total_bb, style.FramePadding.y);
if (!ImGui::ItemAdd(total_bb, 0, &frame_bb))
return;
// Determine scale from values if not specified
if (scale_min == FLT_MAX || scale_max == FLT_MAX)
{
float v_min = FLT_MAX;
float v_max = -FLT_MAX;
for (int i = values_offset; i < values_count; i++)
{
float v_start, v_end;
values_getter(&v_start, &v_end, nullptr, nullptr, data, i);
if (v_start == v_start) // Check non-NaN values
v_min = ImMin(v_min, v_start);
if (v_end == v_end) // Check non-NaN values
v_max = ImMax(v_max, v_end);
}
if (scale_min == FLT_MAX)
scale_min = v_min;
if (scale_max == FLT_MAX)
scale_max = v_max;
}
ImGui::RenderFrame(frame_bb.Min, frame_bb.Max, ImGui::GetColorU32(ImGuiCol_FrameBg), true, style.FrameRounding);
bool any_hovered = false;
if (values_count - values_offset >= 1)
{
const ImU32 col_base = ImGui::GetColorU32(ImGuiCol_PlotHistogram) & 0x77FFFFFF;
const ImU32 col_hovered = ImGui::GetColorU32(ImGuiCol_PlotHistogramHovered) & 0x77FFFFFF;
const ImU32 col_outline_base = ImGui::GetColorU32(ImGuiCol_PlotHistogram) & 0x7FFFFFFF;
const ImU32 col_outline_hovered = ImGui::GetColorU32(ImGuiCol_PlotHistogramHovered) & 0x7FFFFFFF;
for (int i = values_offset; i < values_count; ++i)
{
float stageStart, stageEnd;
ImU8 depth;
const char* caption;
values_getter(&stageStart, &stageEnd, &depth, &caption, data, i);
auto duration = scale_max - scale_min;
if (duration == 0)
{
return;
}
auto start = stageStart - scale_min;
auto end = stageEnd - scale_min;
auto startX = static_cast<float>(start / (double)duration);
auto endX = static_cast<float>(end / (double)duration);
float width = inner_bb.Max.x - inner_bb.Min.x;
float height = blockHeight * (maxDepth - depth + 1) - style.FramePadding.y;
auto pos0 = inner_bb.Min + ImVec2(startX * width, height);
auto pos1 = inner_bb.Min + ImVec2(endX * width, height + blockHeight);
bool v_hovered = false;
if (ImGui::IsMouseHoveringRect(pos0, pos1))
{
ImGui::SetTooltip("%s: %8.4g", caption, stageEnd - stageStart);
v_hovered = true;
any_hovered = v_hovered;
}
window->DrawList->AddRectFilled(pos0, pos1, v_hovered ? col_hovered : col_base);
window->DrawList->AddRect(pos0, pos1, v_hovered ? col_outline_hovered : col_outline_base);
auto textSize = ImGui::CalcTextSize(caption);
auto boxSize = (pos1 - pos0);
auto textOffset = ImVec2(0.0f, 0.0f);
if (textSize.x < boxSize.x)
{
textOffset = ImVec2(0.5f, 0.5f) * (boxSize - textSize);
ImGui::RenderText(pos0 + textOffset, caption);
}
}
// Text overlay
if (overlay_text)
ImGui::RenderTextClipped(ImVec2(frame_bb.Min.x, frame_bb.Min.y + style.FramePadding.y), frame_bb.Max, overlay_text, NULL, NULL, ImVec2(0.5f,0.0f));
if (label_size.x > 0.0f)
ImGui::RenderText(ImVec2(frame_bb.Max.x + style.ItemInnerSpacing.x, inner_bb.Min.y), label);
}
if (!any_hovered && ImGui::IsItemHovered())
{
ImGui::SetTooltip("Total: %8.4g", scale_max - scale_min);
}
}