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Image(): comment and minor refactor to resurface the fact that a border size may be added. (#2118) 

Make more similar to ImageButton()
pull/7111/head
ocornut 11 months ago
parent
5366bd09bf
commit
9d8de45313
2 changed files with 10 additions and 15 deletions
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  1. 4
      imgui.h
  2. 21
      imgui_widgets.cpp

4
imgui.h
View File

@ -532,8 +532,8 @@ namespace ImGui
// Widgets: Images
// - Read about ImTextureID here: https://github.com/ocornut/imgui/wiki/Image-Loading-and-Displaying-Examples
// - Note that ImageButton() adds style.FramePadding*2.0f to provided size. This is in order to facilitate fitting an image in a button.
IMGUI_API void Image(ImTextureID user_texture_id, const ImVec2& size, const ImVec2& uv0 = ImVec2(0, 0), const ImVec2& uv1 = ImVec2(1, 1), const ImVec4& tint_col = ImVec4(1, 1, 1, 1), const ImVec4& border_col = ImVec4(0, 0, 0, 0));
// - Note that Image() may add +2.0f to provided size if a border is visible, ImageButton() adds style.FramePadding*2.0f to provided size.
IMGUI_API void Image(ImTextureID user_texture_id, const ImVec2& image_size, const ImVec2& uv0 = ImVec2(0, 0), const ImVec2& uv1 = ImVec2(1, 1), const ImVec4& tint_col = ImVec4(1, 1, 1, 1), const ImVec4& border_col = ImVec4(0, 0, 0, 0));
IMGUI_API bool ImageButton(const char* str_id, ImTextureID user_texture_id, const ImVec2& image_size, const ImVec2& uv0 = ImVec2(0, 0), const ImVec2& uv1 = ImVec2(1, 1), const ImVec4& bg_col = ImVec4(0, 0, 0, 0), const ImVec4& tint_col = ImVec4(1, 1, 1, 1));
// Widgets: Combo Box (Dropdown)

21
imgui_widgets.cpp
View File

@ -1007,28 +1007,23 @@ bool ImGui::ScrollbarEx(const ImRect& bb_frame, ImGuiID id, ImGuiAxis axis, ImS6
return held;
}
void ImGui::Image(ImTextureID user_texture_id, const ImVec2& size, const ImVec2& uv0, const ImVec2& uv1, const ImVec4& tint_col, const ImVec4& border_col)
void ImGui::Image(ImTextureID user_texture_id, const ImVec2& image_size, const ImVec2& uv0, const ImVec2& uv1, const ImVec4& tint_col, const ImVec4& border_col)
{
ImGuiWindow* window = GetCurrentWindow();
if (window->SkipItems)
return;
ImRect bb(window->DC.CursorPos, window->DC.CursorPos + size);
if (border_col.w > 0.0f)
bb.Max += ImVec2(2, 2);
const float border_size = (border_col.w > 0.0f) ? 1.0f : 0.0f;
const ImVec2 padding(border_size, border_size);
const ImRect bb(window->DC.CursorPos, window->DC.CursorPos + image_size + padding * 2.0f);
ItemSize(bb);
if (!ItemAdd(bb, 0))
return;
if (border_col.w > 0.0f)
{
window->DrawList->AddRect(bb.Min, bb.Max, GetColorU32(border_col), 0.0f);
window->DrawList->AddImage(user_texture_id, bb.Min + ImVec2(1, 1), bb.Max - ImVec2(1, 1), uv0, uv1, GetColorU32(tint_col));
}
else
{
window->DrawList->AddImage(user_texture_id, bb.Min, bb.Max, uv0, uv1, GetColorU32(tint_col));
}
// Render
if (border_size > 0.0f)
window->DrawList->AddRect(bb.Min, bb.Max, GetColorU32(border_col), 0.0f, ImDrawFlags_None, border_size);
window->DrawList->AddImage(user_texture_id, bb.Min + padding, bb.Max - padding, uv0, uv1, GetColorU32(tint_col));
}
// ImageButton() is flawed as 'id' is always derived from 'texture_id' (see #2464 #1390)

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