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Demo: Custom Rendering: expose Stroke Position.

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Demo: Custom Rendering: amend tests (to include legacy AddLine() for vertical/horizontal lines to compare.
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ocornut
2026-05-04 15:55:46 +02:00
parent 79473f30a6
commit e2498814cc
1 changed files with 32 additions and 14 deletions
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46
imgui_demo.cpp
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@@ -10429,6 +10429,15 @@ static void ShowExampleAppCustomRendering(bool* p_open)
curve_segments_override |= ImGui::SliderInt("Curves segments override", &curve_segments_override_v, 3, 40);
ImGui::ColorEdit4("Color", &colf.x);
static ImDrawFlags flags = 0;
ImGui::AlignTextToFramePadding();
ImGui::Text("Stroke:");
ImGui::SameLine(); ImGui::RadioButton("Inside", &flags, ImDrawFlags_StrokeInside);
ImGui::SameLine(); ImGui::RadioButton("Center", &flags, ImDrawFlags_StrokeCenter);
ImGui::SameLine(); ImGui::RadioButton("CenterPixelAligned", &flags, ImDrawFlags_StrokeCenterPixelAligned);
ImGui::SameLine(); ImGui::RadioButton("Outside", &flags, ImDrawFlags_StrokeOutside);
ImGui::SameLine(); ImGui::RadioButton("Legacy", &flags, ImDrawFlags_StrokeLegacy);
const ImVec2 p = ImGui::GetCursorScreenPos();
const ImU32 col = ImColor(colf);
const float spacing = 10.0f;
@@ -10445,23 +10454,27 @@ static void ShowExampleAppCustomRendering(bool* p_open)
{
// First line uses a thickness of 1.0f, second line uses the configurable thickness
float th = (n == 0) ? 1.0f : thickness;
draw_list->AddNgon(ImVec2(x + sz*0.5f, y + sz*0.5f), sz*0.5f, col, ngon_sides, th); x += sz + spacing; // N-gon
draw_list->AddCircle(ImVec2(x + sz*0.5f, y + sz*0.5f), sz*0.5f, col, circle_segments, th); x += sz + spacing; // Circle
draw_list->AddEllipse(ImVec2(x + sz*0.5f, y + sz*0.5f), ImVec2(sz*0.5f, sz*0.3f), col, -0.3f, circle_segments, th); x += sz + spacing; // Ellipse
draw_list->AddRect(ImVec2(x, y), ImVec2(x + sz, y + sz), col, 0.0f, th); x += sz + spacing; // Square
draw_list->AddRect(ImVec2(x, y), ImVec2(x + sz, y + sz), col, rounding, th); x += sz + spacing; // Square with all rounded corners
draw_list->AddRect(ImVec2(x, y), ImVec2(x + sz, y + sz), col, rounding, th, corners_tl_br); x += sz + spacing; // Square with two rounded corners
draw_list->AddTriangle(ImVec2(x+sz*0.5f,y), ImVec2(x+sz, y+sz-0.5f), ImVec2(x, y+sz-0.5f), col, th);x += sz + spacing; // Triangle
draw_list->AddNgon(ImVec2(x + sz*0.5f, y + sz*0.5f), sz*0.5f, col, ngon_sides, th, flags); x += sz + spacing; // N-gon
draw_list->AddCircle(ImVec2(x + sz*0.5f, y + sz*0.5f), sz*0.5f, col, circle_segments, th, flags); x += sz + spacing; // Circle
draw_list->AddEllipse(ImVec2(x + sz*0.5f, y + sz*0.5f), ImVec2(sz*0.5f, sz*0.3f), col, -0.3f, circle_segments, th, flags); x += sz + spacing; // Ellipse
draw_list->AddRect(ImVec2(x, y), ImVec2(x + sz, y + sz), col, 0.0f, th, flags); x += sz + spacing; // Square
draw_list->AddRect(ImVec2(x, y), ImVec2(x + sz, y + sz), col, rounding, th, flags); x += sz + spacing; // Square with all rounded corners
draw_list->AddRect(ImVec2(x, y), ImVec2(x + sz, y + sz), col, rounding, th, flags | corners_tl_br); x += sz + spacing; // Square with two rounded corners
draw_list->AddTriangle(ImVec2(x+sz*0.5f,y), ImVec2(x+sz, y+sz-0.5f), ImVec2(x, y+sz-0.5f), col, th/*, flags*/);x += sz + spacing; // Triangle
//draw_list->AddTriangle(ImVec2(x+sz*0.2f,y), ImVec2(x, y+sz-0.5f), ImVec2(x+sz*0.4f, y+sz-0.5f), col, th);x+= sz*0.4f + spacing; // Thin triangle
PathConcaveShape(draw_list, x, y, sz); draw_list->PathStroke(col, th, ImDrawFlags_Closed); x += sz + spacing; // Concave Shape
PathConcaveShape(draw_list, x, y, sz); draw_list->PathStroke(col, th, flags | ImDrawFlags_Closed); x += sz + spacing; // Concave Shape
//draw_list->AddPolyline(concave_shape, IM_COUNTOF(concave_shape), col, ImDrawFlags_Closed, th);
draw_list->AddLineH(x, x + sz, y, col, th); x += sz + spacing; // Horizontal line (note: drawing a filled rectangle will be faster!)
draw_list->AddLineV(x, y, y + sz, col, th); x += spacing; // Vertical line (note: drawing a filled rectangle will be faster!)
draw_list->AddLine(ImVec2(x, y), ImVec2(x + sz, y + sz), col, th); x += sz + spacing; // Diagonal line
draw_list->AddLineH(x, x + sz, y, col, th, flags); x += sz + spacing; // Horizontal line (note: drawing a filled rectangle will be faster!)
draw_list->AddLineV(x, y, y + sz, col, th, flags); x += spacing; // Vertical line (note: drawing a filled rectangle will be faster!)
draw_list->AddLine(ImVec2(x, y), ImVec2(x + sz, y), col, th, flags); x += sz + spacing;
draw_list->AddLine(ImVec2(x, y), ImVec2(x, y + sz), col, th, flags); x += spacing;
draw_list->AddLine(ImVec2(x, y), ImVec2(x + sz, y + sz), col, th, flags); x += sz + spacing; // Diagonal line
// Path
draw_list->PathArcTo(ImVec2(x + sz*0.5f, y + sz*0.5f), sz*0.5f, 3.141592f, 3.141592f * -0.5f);
draw_list->PathStroke(col, th);
draw_list->PathStroke(col, th, flags);
x += sz + spacing;
// Quadratic Bezier Curve (3 control points)
@@ -10486,8 +10499,13 @@ static void ShowExampleAppCustomRendering(bool* p_open)
//draw_list->AddTriangleFilled(ImVec2(x+sz*0.2f,y), ImVec2(x, y+sz-0.5f), ImVec2(x+sz*0.4f, y+sz-0.5f), col); x += sz*0.4f + spacing; // Thin triangle
PathConcaveShape(draw_list, x, y, sz); draw_list->PathFillConcave(col); x += sz + spacing; // Concave shape
draw_list->AddRectFilled(ImVec2(x, y), ImVec2(x + sz, y + thickness), col); x += sz + spacing; // Horizontal line (faster than AddLine, but only handle integer thickness)
draw_list->AddRectFilled(ImVec2(x, y), ImVec2(x + thickness, y + sz), col); x += spacing * 2.0f;// Vertical line (faster than AddLine, but only handle integer thickness)
draw_list->AddRectFilled(ImVec2(x, y), ImVec2(x + 1, y + 1), col); x += sz; // Pixel (faster than AddLine)
draw_list->AddRectFilled(ImVec2(x, y), ImVec2(x + thickness, y + sz), col); x += spacing; // Vertical line (faster than AddLine, but only handle integer thickness)
x += sz + spacing;
x += spacing;
draw_list->AddRectFilled(ImVec2(x + 0, y), ImVec2(x + 0 + 1, y + 1), col); // Pixels (faster than AddLine)
draw_list->AddRectFilled(ImVec2(x + 2, y), ImVec2(x + 2 + 2, y + 2), col);
draw_list->AddRectFilled(ImVec2(x + 5, y), ImVec2(x + 5 + 3, y + 3), col);
x += spacing + sz;
// Path
draw_list->PathArcTo(ImVec2(x + sz * 0.5f, y + sz * 0.5f), sz * 0.5f, 3.141592f * -0.5f, 3.141592f);