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Code Activity

Shadows: Added experimental texture-based shadows (stripped of dynamic tex config and back-end code)

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(merged 10 commits, removing dynamic tex config, moved tex config to internal structs, removed back-end changes)
(squashed 2025-06-11, fixed conflict, doesn't build as-is)
Shadows: Added IMGUI_HAS_SHADOWS
Shadows: Demo code in Custom Rendering section. Added AddShadowRectFilled() variant. BeginMainMenuBar() disable shadows.
Shadows: Added initial version of convex shape shadow code.
(+stripped out of original polygon generation demo, moved to imgui_dev)
Shadows: Tweak demo to use AddShadowCircle() functions + fix warnings.
 (+ stripped old polygon generation code from commits)
Shadows: Convex shape shadow improvement/fixes
- Fixed pixel cracking on convex shadow edges
- Added convex shadow offset support
- Fixed some convex shadow fringing issues
- Added convex shadow demo code
Shadows: Added ImDrawShadowFlags, simplified API surface, reordered parameters
+ fix minor warnings
+ removed NGon variant for now.
Shadows: Re-added AddShadowNGon().
Shadows: Shallow styling tweaks and renaming for consistency.
Shadows: Fixes + two fixes for PVS Studio static analyzer.
Shadows: Fix for latest, reuse ImDrawList, remove ImDrawShadowFlags.
Shadows: Fix to support for colored-only font atlas. (4202)
Shadows: Fix broken shadows due to zero-clear added in 9417acc2.
Shadows: remove use of GetWindowContentRegionMax().
Shadows: WIP fixes for latest. (broken UV caching)
Shadows: WIP for latest (refreshing UV coordinates).
This commit is contained in:
Ben Carter 2020-04-24 18:16:48 +02:00 • committed by ocornut
parent 6d910d5487
commit aea4f38726
6 changed files with 1270 additions and 0 deletions
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26
imgui.cpp
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@ -1341,6 +1341,7 @@ static void UpdateTexturesNewFrame();
static void UpdateTexturesEndFrame();
static void UpdateSettings();
static int UpdateWindowManualResize(ImGuiWindow* window, int* border_hovered, int* border_held, int resize_grip_count, ImU32 resize_grip_col[4], const ImRect& visibility_rect);
static void RenderWindowShadow(ImGuiWindow* window);
static void RenderWindowOuterBorders(ImGuiWindow* window);
static void RenderWindowDecorations(ImGuiWindow* window, const ImRect& title_bar_rect, bool title_bar_is_highlight, bool handle_borders_and_resize_grips, int resize_grip_count, const ImU32 resize_grip_col[4], float resize_grip_draw_size);
static void RenderWindowTitleBarContents(ImGuiWindow* window, const ImRect& title_bar_rect, const char* name, bool* p_open);
@ -1466,6 +1467,9 @@ ImGuiStyle::ImGuiStyle()
AntiAliasedFill = true; // Enable anti-aliased filled shapes (rounded rectangles, circles, etc.).
CurveTessellationTol = 1.25f; // Tessellation tolerance when using PathBezierCurveTo() without a specific number of segments. Decrease for highly tessellated curves (higher quality, more polygons), increase to reduce quality.
CircleTessellationMaxError = 0.30f; // Maximum error (in pixels) allowed when using AddCircle()/AddCircleFilled() or drawing rounded corner rectangles with no explicit segment count specified. Decrease for higher quality but more geometry.
WindowShadowSize = 100.0f; // Size (in pixels) of window shadows.
WindowShadowOffsetDist = 0.0f; // Offset distance (in pixels) of window shadows from casting window.
WindowShadowOffsetAngle = IM_PI * 0.25f; // Offset angle of window shadows from casting window (0.0f = left, 0.5f*PI = bottom, 1.0f*PI = right, 1.5f*PI = top).
// Behaviors
HoverStationaryDelay = 0.15f; // Delay for IsItemHovered(ImGuiHoveredFlags_Stationary). Time required to consider mouse stationary.
@ -3727,6 +3731,7 @@ const char* ImGui::GetStyleColorName(ImGuiCol idx)
case ImGuiCol_NavWindowingHighlight: return "NavWindowingHighlight";
case ImGuiCol_NavWindowingDimBg: return "NavWindowingDimBg";
case ImGuiCol_ModalWindowDimBg: return "ModalWindowDimBg";
case ImGuiCol_WindowShadow: return "WindowShadow";
}
IM_ASSERT(0);
return "Unknown";
@ -7084,6 +7089,11 @@ void ImGui::RenderWindowDecorations(ImGuiWindow* window, const ImRect& title_bar
window->DrawList->AddRectFilled(window->Pos + ImVec2(0, window->TitleBarHeight), window->Pos + window->Size, bg_col, window_rounding, (flags & ImGuiWindowFlags_NoTitleBar) ? 0 : ImDrawFlags_RoundCornersBottom);
}
// Draw window shadow
if (style.WindowShadowSize > 0.0f && (!(flags & ImGuiWindowFlags_ChildWindow) || (flags & ImGuiWindowFlags_Popup)))
if (style.Colors[ImGuiCol_WindowShadow].w > 0.0f)
RenderWindowShadow(window);
// Title bar
if (!(flags & ImGuiWindowFlags_NoTitleBar))
{
@ -7132,6 +7142,16 @@ void ImGui::RenderWindowDecorations(ImGuiWindow* window, const ImRect& title_bar
window->DC.NavLayerCurrent = ImGuiNavLayer_Main;
}
void ImGui::RenderWindowShadow(ImGuiWindow* window)
{
ImGuiContext& g = *GImGui;
ImGuiStyle& style = g.Style;
float shadow_size = style.WindowShadowSize;
ImU32 shadow_col = GetColorU32(ImGuiCol_WindowShadow);
ImVec2 shadow_offset = ImVec2(ImCos(style.WindowShadowOffsetAngle), ImSin(style.WindowShadowOffsetAngle)) * style.WindowShadowOffsetDist;
window->DrawList->AddShadowRect(window->Pos, window->Pos + window->Size, shadow_col, shadow_size, shadow_offset, ImDrawFlags_ShadowCutOutShapeBackground, window->WindowRounding);
}
// Render title text, collapse button, close button
void ImGui::RenderWindowTitleBarContents(ImGuiWindow* window, const ImRect& title_bar_rect, const char* name, bool* p_open)
{
@ -9004,6 +9024,12 @@ void ImGui::UpdateCurrentFontSize(float restore_font_size_after_scaling)
g.FontBakedScale = (g.Font != NULL && window != NULL) ? (g.FontSize / g.FontBaked->Size) : 0.0f;
g.DrawListSharedData.FontSize = g.FontSize;
g.DrawListSharedData.FontScale = g.FontBakedScale;
if (g.Font)
{
ImFontAtlas* atlas = g.Font->OwnerAtlas;
g.DrawListSharedData.ShadowRectIds = &atlas->ShadowRectIds[0];
g.DrawListSharedData.ShadowRectUvs = &atlas->ShadowRectUvs[0];
}
}
// Exposed in case user may want to override setting density.