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ColorButton: Fixed rendering color button with a checkerboard if the transparency comes from the global style.Alpha and not from the actual source color.

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This commit is contained in:
omar 2017-10-24 10:43:41 +02:00
parent de72e9cc87
commit e9ff7162bc
1 changed files with 7 additions and 2 deletions
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9
imgui.cpp
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@ -9433,7 +9433,7 @@ bool ImGui::ColorButton(const char* desc_id, const ImVec4& col, ImGuiColorEditFl
float grid_step = ImMin(size.x, size.y) / 2.99f; float grid_step = ImMin(size.x, size.y) / 2.99f;
float rounding = ImMin(g.Style.FrameRounding, grid_step * 0.5f); float rounding = ImMin(g.Style.FrameRounding, grid_step * 0.5f);
ImRect bb_inner = bb; ImRect bb_inner = bb;
float off = -0.75f; // The border (using Col_FrameBg) tends to look off when color is near-opaque and rounding is enabled. This offset seemed like a good middleground to reduce those artefacts. float off = -0.75f; // The border (using Col_FrameBg) tends to look off when color is near-opaque and rounding is enabled. This offset seemed like a good middle ground to reduce those artifacts.
bb_inner.Expand(off); bb_inner.Expand(off);
if ((flags & ImGuiColorEditFlags_AlphaPreviewHalf) && col.w < 1.0f) if ((flags & ImGuiColorEditFlags_AlphaPreviewHalf) && col.w < 1.0f)
{ {
@ -9443,7 +9443,12 @@ bool ImGui::ColorButton(const char* desc_id, const ImVec4& col, ImGuiColorEditFl
} }
else else
{ {
RenderColorRectWithAlphaCheckerboard(bb_inner.Min, bb_inner.Max, GetColorU32((flags & ImGuiColorEditFlags_AlphaPreview) ? col : col_without_alpha), grid_step, ImVec2(off, off), rounding); // Because GetColorU32() multiplies by the global style Alpha and we don't want to display a checkerboard if the source code had no alpha
ImVec4 col_source = (flags & ImGuiColorEditFlags_AlphaPreview) ? col : col_without_alpha;
if (col_source.w < 1.0f)
RenderColorRectWithAlphaCheckerboard(bb_inner.Min, bb_inner.Max, GetColorU32(col_source), grid_step, ImVec2(off, off), rounding);
else
window->DrawList->AddRectFilled(bb_inner.Min, bb_inner.Max, GetColorU32(col_source), rounding, ~0);
} }
if (window->Flags & ImGuiWindowFlags_ShowBorders) if (window->Flags & ImGuiWindowFlags_ShowBorders)
RenderFrameBorder(bb.Min, bb.Max, rounding); RenderFrameBorder(bb.Min, bb.Max, rounding);