Demo: Added color gradient in demo to identify srgb/linear issues better. Tweaks.

docs/CHANGELOG.txt

@@ -47,7 +47,7 @@ Other Changes:
 - Window: Fixed a bug with child window inheriting ItemFlags from their parent when the child
   window also manipulate the ItemFlags stack. (#3024) [@Stanbroek]
 - Font: Fixed non-ASCII space occasionally creating unnecessary empty polygons.
-- Demo: Added a black and white gradient to Demo>Examples>Custom Rendering.
+- Demo: Added black and white and color gradients to Demo>Examples>Custom Rendering.
 - Backends: Win32: Added ImGui_ImplWin32_EnableDpiAwareness(), ImGui_ImplWin32_GetDpiScaleForHwnd(),
   ImGui_ImplWin32_GetDpiScaleForMonitor() helpers functions (backported from the docking branch).
   Those functions makes it easier for example apps to support hi-dpi features without setting up

docs/README.md

@@ -194,7 +194,7 @@ Ongoing Dear ImGui development is financially supported by users and private spo
 - [Blizzard](https://careers.blizzard.com/en-us/openings/engineering/all/all/all/1), [Google](https://github.com/google/filament), [Nvidia](https://developer.nvidia.com/nvidia-omniverse), [Ubisoft](https://montreal.ubisoft.com/en/ubisoft-sponsors-user-interface-library-for-c-dear-imgui/)
 
 *Double-chocolate and Salty caramel sponsors*
-- [DotEmu](http://www.dotemu.com), [Framefield](http://framefield.com), [Hexagon](https://hexagonxalt.com/the-technology/xalt-visualization), [Kylotonn](https://www.kylotonn.com), [Media Molecule](http://www.mediamolecule.com), [Mesh Consultants](https://www.meshconsultants.ca), [Mobigame](http://www.mobigame.net), [Nadeo](https://www.nadeo.com), [Supercell](http://www.supercell.com), [Remedy Entertainment](https://www.remedygames.com/), [Unit 2 Games](https://unit2games.com/)
+- [Activision](https://careers.activision.com/c/programmingsoftware-engineering-jobs), [DotEmu](http://www.dotemu.com), [Framefield](http://framefield.com), [Hexagon](https://hexagonxalt.com/the-technology/xalt-visualization), [Kylotonn](https://www.kylotonn.com), [Media Molecule](http://www.mediamolecule.com), [Mesh Consultants](https://www.meshconsultants.ca), [Mobigame](http://www.mobigame.net), [Nadeo](https://www.nadeo.com), [Supercell](http://www.supercell.com), [Remedy Entertainment](https://www.remedygames.com/), [Unit 2 Games](https://unit2games.com/)
 
 From November 2014 to December 2019, ongoing development has also been financially supported by its users on Patreon and through individual donations. Please see [detailed list of Dear ImGui supporters](https://github.com/ocornut/imgui/wiki/Sponsors). 
 

imgui.cpp

@@ -3383,7 +3383,7 @@ static void ImGui::UpdateMouseInputs()
                 ImVec2 delta_from_click_pos = IsMousePosValid(&g.IO.MousePos) ? (g.IO.MousePos - g.IO.MouseClickedPos[i]) : ImVec2(0.0f, 0.0f);
                 if (ImLengthSqr(delta_from_click_pos) < g.IO.MouseDoubleClickMaxDist * g.IO.MouseDoubleClickMaxDist)
                     g.IO.MouseDoubleClicked[i] = true;
-                g.IO.MouseClickedTime[i] = -FLT_MAX;    // so the third click isn't turned into a double-click
+                g.IO.MouseClickedTime[i] = -DBL_MAX;    // so the third click isn't turned into a double-click
             }
             else
             {

imgui_demo.cpp

@@ -4454,16 +4454,37 @@ static void ShowExampleAppCustomRendering(bool* p_open)
 
     if (ImGui::BeginTabBar("##TabBar"))
     {
-        // Primitives
         if (ImGui::BeginTabItem("Primitives"))
         {
+            ImGui::PushItemWidth(-ImGui::GetFontSize() * 10);
+
+            // Draw gradients
+            // (note that those are currently exacerbating our sRGB/Linear issues)
+            ImGui::Text("Gradients");
+            ImVec2 gradient_size = ImVec2(ImGui::CalcItemWidth(), ImGui::GetFrameHeight());
+            {
+                ImVec2 p = ImGui::GetCursorScreenPos();
+                ImU32 col_a = ImGui::GetColorU32(ImVec4(0.0f, 0.0f, 0.0f, 1.0f));
+                ImU32 col_b = ImGui::GetColorU32(ImVec4(1.0f, 1.0f, 1.0f, 1.0f));
+                draw_list->AddRectFilledMultiColor(p, ImVec2(p.x + gradient_size.x, p.y + gradient_size.y), col_a, col_b, col_b, col_a);
+                ImGui::InvisibleButton("##gradient1", gradient_size);
+            }
+            {
+                ImVec2 p = ImGui::GetCursorScreenPos();
+                ImU32 col_a = ImGui::GetColorU32(ImVec4(0.0f, 1.0f, 0.0f, 1.0f));
+                ImU32 col_b = ImGui::GetColorU32(ImVec4(1.0f, 0.0f, 0.0f, 1.0f));
+                draw_list->AddRectFilledMultiColor(p, ImVec2(p.x + gradient_size.x, p.y + gradient_size.y), col_a, col_b, col_b, col_a);
+                ImGui::InvisibleButton("##gradient2", gradient_size);
+            }
+
+            // Draw a bunch of primitives
+            ImGui::Text("All primitives");
             static float sz = 36.0f;
             static float thickness = 3.0f;
             static int ngon_sides = 6;
             static bool circle_segments_override = false;
             static int circle_segments_override_v = 12;
             static ImVec4 colf = ImVec4(1.0f, 1.0f, 0.4f, 1.0f);
-            ImGui::PushItemWidth(-ImGui::GetFontSize() * 10);
             ImGui::DragFloat("Size", &sz, 0.2f, 2.0f, 72.0f, "%.0f");
             ImGui::DragFloat("Thickness", &thickness, 0.05f, 1.0f, 8.0f, "%.02f");
             ImGui::SliderInt("N-gon sides", &ngon_sides, 3, 12);
@@ -4511,26 +4532,6 @@ static void ShowExampleAppCustomRendering(bool* p_open)
             draw_list->AddRectFilledMultiColor(ImVec2(x, y), ImVec2(x + sz, y + sz), IM_COL32(0, 0, 0, 255), IM_COL32(255, 0, 0, 255), IM_COL32(255, 255, 0, 255), IM_COL32(0, 255, 0, 255));
             ImGui::Dummy(ImVec2((sz + spacing) * 9.8f, (sz + spacing) * 3));
 
-            // Draw black and white gradients
-            static int gradient_steps = 16;
-            ImGui::Separator();
-            ImGui::AlignTextToFramePadding();
-            ImGui::Text("Gradient steps");
-            ImGui::SameLine(); if (ImGui::RadioButton("16", gradient_steps == 16)) { gradient_steps = 16; }
-            ImGui::SameLine(); if (ImGui::RadioButton("32", gradient_steps == 32)) { gradient_steps = 32; }
-            ImGui::SameLine(); if (ImGui::RadioButton("256", gradient_steps == 256)) { gradient_steps = 256; }
-            ImVec2 gradient_size = ImVec2(ImGui::CalcItemWidth(), 64.0f);
-            x = ImGui::GetCursorScreenPos().x;
-            y = ImGui::GetCursorScreenPos().y;
-            for (int n = 0; n < gradient_steps; n++)
-            {
-                float f0 = n / (float)gradient_steps;
-                float f1 = (n + 1) / (float)gradient_steps;
-                ImU32 col32 = ImGui::GetColorU32(ImVec4(f0, f0, f0, 1.0f));
-                draw_list->AddRectFilled(ImVec2(x + gradient_size.x * f0, y), ImVec2(x + gradient_size.x * f1, y + gradient_size.y), col32);
-            }
-            ImGui::InvisibleButton("##gradient", gradient_size);
-
             ImGui::PopItemWidth();
             ImGui::EndTabItem();
         }
@@ -4598,9 +4599,9 @@ static void ShowExampleAppCustomRendering(bool* p_open)
             ImVec2 window_size = ImGui::GetWindowSize();
             ImVec2 window_center = ImVec2(window_pos.x + window_size.x * 0.5f, window_pos.y + window_size.y * 0.5f);
             if (draw_bg)
-                ImGui::GetBackgroundDrawList()->AddCircle(window_center, window_size.x * 0.6f, IM_COL32(255, 0, 0, 200), 48, 10+4);
+                ImGui::GetBackgroundDrawList()->AddCircle(window_center, window_size.x * 0.6f, IM_COL32(255, 0, 0, 200), 0, 10+4);
             if (draw_fg)
-                ImGui::GetForegroundDrawList()->AddCircle(window_center, window_size.y * 0.6f, IM_COL32(0, 255, 0, 200), 48, 10);
+                ImGui::GetForegroundDrawList()->AddCircle(window_center, window_size.y * 0.6f, IM_COL32(0, 255, 0, 200), 0, 10);
             ImGui::EndTabItem();
         }