Internals: Removed unused ShadeVertsLinearAlphaGradientForLeftToRightText code.

imgui_draw.cpp

@@ -1267,23 +1267,6 @@ void ImGui::ShadeVertsLinearColorGradientKeepAlpha(ImDrawVert* vert_start, ImDra
     }
 }
 
-// Scan and shade backward from the end of given vertices. Assume vertices are text only (= vert_start..vert_end going left to right) so we can break as soon as we are out the gradient bounds.
-void ImGui::ShadeVertsLinearAlphaGradientForLeftToRightText(ImDrawVert* vert_start, ImDrawVert* vert_end, float gradient_p0_x, float gradient_p1_x)
-{
-    float gradient_extent_x = gradient_p1_x - gradient_p0_x;
-    float gradient_inv_length2 = 1.0f / (gradient_extent_x * gradient_extent_x);
-    int full_alpha_count = 0;
-    for (ImDrawVert* vert = vert_end - 1; vert >= vert_start; vert--)
-    {
-        float d = (vert->pos.x - gradient_p0_x) * (gradient_extent_x);
-        float alpha_mul = 1.0f - ImClamp(d * gradient_inv_length2, 0.0f, 1.0f);
-        if (alpha_mul >= 1.0f && ++full_alpha_count > 2)
-            return; // Early out
-        int a = (int)(((vert->col >> IM_COL32_A_SHIFT) & 0xFF) * alpha_mul);
-        vert->col = (vert->col & ~IM_COL32_A_MASK) | (a << IM_COL32_A_SHIFT);
-    }
-}
-
 // Distribute UV over (a, b) rectangle
 void ImGui::ShadeVertsLinearUV(ImDrawVert* vert_start, ImDrawVert* vert_end, const ImVec2& a, const ImVec2& b, const ImVec2& uv_a, const ImVec2& uv_b, bool clamp)
 {

imgui_internal.h

@@ -1175,7 +1175,6 @@ namespace ImGui
 
     // Shade functions (write over already created vertices)
     IMGUI_API void          ShadeVertsLinearColorGradientKeepAlpha(ImDrawVert* vert_start, ImDrawVert* vert_end, ImVec2 gradient_p0, ImVec2 gradient_p1, ImU32 col0, ImU32 col1);
-    IMGUI_API void          ShadeVertsLinearAlphaGradientForLeftToRightText(ImDrawVert* vert_start, ImDrawVert* vert_end, float gradient_p0_x, float gradient_p1_x);
     IMGUI_API void          ShadeVertsLinearUV(ImDrawVert* vert_start, ImDrawVert* vert_end, const ImVec2& a, const ImVec2& b, const ImVec2& uv_a, const ImVec2& uv_b, bool clamp);
 
 } // namespace ImGui